CN202847348U - Auxiliary wheel, and locking tool and unlocking tool used in matching - Google Patents

Abstract

The utility model discloses an auxiliary wheel, and a locking tool and an unlocking tool used in matching. The auxiliary wheel comprises a hub and a wheel tire; and the auxiliary wheel is fixedly installed on a wheel of a motor vehicle in a manner of having a common rotating axis. The auxiliary wheel further comprises one or more locking components placed on the hub; and the locking component(s) is/are used for fixing the auxiliary wheel on the hub of the wheel, so that the auxiliary wheel is driven by the hub of the wheel. The utility model further relates to a no-power jack used when the auxiliary wheel is installed; and the no-power jack comprises a climbing block and a supporting block which are rotatably connected, wherein the climbing block and the supporting block have a common supporting bottom, and the climbing block has a slope for climbing of the auxiliary wheel.

Description

Auxiliary wheel and locking and unlocking tool matched with same

Technical Field

The utility model relates to an auxiliary wheel and be used for installation of auxiliary wheel and the no helping hand jack of dismantlement.

Background

The vehicle may encounter various sudden situations during running, such as a failure of the tire in air tightness, severe weather such as ice and snow, and the like. In the prior art, after an emergency occurs, the commonly adopted processing method includes: replacement of a faulty tire, change to a special tire for special weather, or temporary handling of the tire, etc. For example, in order to address a flat tire, a special tire may be used, which has a support structure inside to ensure that the motor vehicle can safely travel for a certain distance after the flat tire is punctured; also for example, in slippery road sections such as mud, a studded tire may be used; further, for example, in icy and snowy weather, a tire chain or the like may be attached to a tire, thereby improving the vehicle running safety.

Although the special tire can solve the above problems to some extent, the special tire is more expensive than a general tire, and the special tire is used for a short time in order to cause an emergency with a small probability, which is not cost effective for users. On the other hand, if the manner of replacing the tire or wheel is adopted, the faulty tire or wheel needs to be removed and the spare tire or wheel is mounted, or the anti-skid tire needs to be mounted by using a special tool, and the steps of removing and mounting are rather troublesome, laborious, time-consuming and require some professional skill to complete. Therefore, users want to be able to provide a more cost effective way to prevent and deal with accidents of tires or wheels, and the handling of accidents is simpler, more convenient and faster.

Disclosure of Invention

In order to solve the technical problem, the utility model provides an auxiliary wheel and be used for the installation of auxiliary wheel and the no helping hand jack of dismantlement.

According to one aspect of the present invention, there is provided an auxiliary wheel comprising a hub and a tyre, the auxiliary wheel being fixedly mounted on a motor vehicle wheel in a manner having a common axis of rotation with the wheel.

Preferably, the utility model discloses an auxiliary wheel is including being located the first lock solid subassembly of one or more on wheel hub for with the auxiliary wheel is fixed on wheel hub for the auxiliary wheel is by wheel hub direct drive.

Preferably, the first locking assembly is used for fixing the auxiliary wheel to the wheel hub through a through hole in the wheel hub; alternatively, the first locking assembly is adapted to couple with a second locking assembly located on the wheel hub to mount the auxiliary wheel to the wheel hub.

Preferably, the first locking assembly comprises stop means and a self-locking device with successive locking positions, the self-locking device comprising:

a base having a cavity, a sidewall of the cavity including a first frictional contact surface and a fourth frictional contact surface, and the base being fixed to or integrally formed with the auxiliary wheel hub;

a self-locking component having a second frictional contact surface and a third frictional contact surface, the self-locking component being arranged to be at least partially located within the cavity such that the second frictional contact surface faces the first frictional contact surface and the third frictional contact surface faces the fourth frictional contact surface;

the first locking block is arranged between the first friction contact surface and the second friction contact surface and is contacted with the first friction contact surface and the second friction contact surface, and the second locking block is arranged between the third friction contact surface and the fourth friction contact surface and is contacted with the third friction contact surface and the fourth friction contact surface; the first locking block and the second locking block are configured to enable the self-locking component to be movable relative to the base along a first direction and locked in a second direction opposite to the first direction, so that the self-locking component can be locked in any continuous locking position, namely stepless locking is realized; preferably, the second direction is a direction in which a vertex of an angle formed by the first and second frictional contact surfaces or an angle formed by the third and fourth frictional contact surfaces is pointed.

Movement of the self-locking member in a first direction causes the stop means to abut against the wheel hub, thereby clamping the wheel hub between the self-locking means and the stop means, and locking of the self-locking member in a second direction prevents the stop means from disengaging from the wheel hub.

Preferably, the included angle between the first and second frictional contact surfaces is α, the included angle between the fourth and third frictional contact surfaces is α ', and the frictional angles of the first lock piece with respect to the first and second frictional contact surfaces are α', respectivelyAnd

the friction angles of the second locking block relative to the third and fourth friction contact surfaces are respectively

And

wherein,

and is

Preferably, 0<Alpha is less than or equal to 17 DEG and 0<Alpha' is less than or equal to 17 degrees; more preferably, α = α',

and is

Preferably, the self-locking device further comprises a holding component, and the holding component is used for exerting force on the first locking piece and the second locking piece, so that when the self-locking component is locked at the locking position, the first locking piece is kept in contact with the first friction contact surface and the second friction contact surface, and the second locking piece is kept in contact with the third friction contact surface and the fourth friction contact surface.

Preferably, the retaining means comprises a spring and a lock block sleeve extending through said cavity, the self-locking means extending through the lock block sleeve, a side wall of the lock block sleeve having a first aperture adapted to receive the first lock block and a second aperture adapted to receive the second lock block;

the spring is positioned in the cavity and applies elasticity to the first locking block and the second locking block; or

The spring is located outside the base and exerts elasticity on the lock block sleeve, a flange is arranged at the end of the lock block sleeve, and the spring is arranged between the outer surface of the base and the flange of the lock block sleeve.

According to another aspect of the invention, the first locking assembly comprises a stop device and a self-locking device with a continuous locking position, the self-locking device comprising:

a base having a cavity, the side wall of the cavity including a first frictional contact surface, and the base being fixed to or formed integrally with the auxiliary wheel hub;

a self-locking component having a second frictional contact surface, the self-locking component being arranged to be at least partially located within the cavity, the second frictional contact surface facing the first frictional contact surface;

a first lock block disposed between and in contact with the first and second frictional contact surfaces; the first locking block is configured to enable the self-locking part to be movable along a first direction relative to the base and to be locked in a second direction opposite to the first direction, so that the self-locking part can be locked in any continuous locking position;

movement of the self-locking member in a first direction causes the stop means to abut against the wheel hub, thereby clamping the wheel hub between the self-locking means and the stop means, and locking of the self-locking member in a second direction prevents the stop means from disengaging from the wheel hub.

Preferably, the included angle between the first and second friction contact surfaces is smaller than or equal to the sum of the friction angles of the first lock piece relative to the first and second friction contact surfaces respectively; preferably, the angle between the first and second frictional contact surfaces is less than or equal to 17 °.

Preferably, the self-locking device further comprises a retaining member for applying an elastic force to the first lock piece so that the first lock piece is kept in contact with the first and second frictional contact surfaces when the self-locking member is locked in the locking position.

Preferably, the friction contact surface has a groove matching the shape of the locking piece, along which the locking piece runs.

Preferably, the base, the self-locking part and the locking block are made of steel.

Preferably, the self-locking part is a plate wheel which is rotationally coupled with the base and is rotatable in the first direction and the second direction; preferably, the plate wheel is provided with a trigger along the radial direction thereof for rotating the plate wheel.

Preferably, the stopping means comprises a link mechanism and a stopping mechanism coupled to the link mechanism, wherein the link mechanism is configured to be coupled to the self-locking part through a through hole in the hub of the auxiliary wheel, so that movement of the self-locking part in the first direction urges the stopping mechanism against a side of the hub of the wheel facing away from the auxiliary wheel.

Preferably, the linkage mechanism and the stopping mechanism are movably connected or integrally formed, and/or the linkage mechanism and the self-locking part are movably connected or integrally formed; preferably, when the link mechanism is movably coupled with the stopping mechanism, one end of the stopping mechanism is rotationally coupled relative to the auxiliary wheel hub, and the other end of the stopping mechanism is used for abutting against or loosening from the wheel hub under the driving of the link mechanism; more preferably, the stopping means further comprises means for applying a spring force to the stopping mechanism to automatically disengage the wheel hub when unlocked.

Preferably, the first locking assembly further comprises an adapter module having a shape complementary to the through hole of the wheel hub and fitting into said through hole when the auxiliary wheel is fixed to the wheel hub.

Preferably, one end of the stopping mechanism is rotatably coupled with the adapter module, and the other end of the stopping mechanism is used for abutting against the wheel hub under the driving of the self-locking component.

Preferably, the second locking component is a lock cylinder; the first locking assembly is used for locking the lock cylinder. The lock cylinder is provided with an annular lock groove; and the first locking assembly comprises: the self-locking mechanism comprises a locking piece sleeve, a locking piece, a self-locking cover, an elastic component and a gland, wherein the locking piece sleeve is fixed on a hub of the auxiliary wheel or integrally formed with the hub of the auxiliary wheel and is used for being sleeved on the locking piece around the locking piece, locking piece holes corresponding to the number of the locking pieces and corresponding to the position of an annular locking groove are formed in the side wall of the locking piece sleeve, the locking piece holes are used for embedding the locking pieces, the self-locking cover is arranged around the locking piece sleeve, the contact surface facing the locking piece is a conical surface, the gland is fixedly arranged on the locking piece sleeve, and the elastic component is used for providing elastic force for enabling the conical surface of the self-locking cover to compress the locking pieces and be embedded.

Preferably, the included angle formed by the contact surface of the lock piece and the lock column and the included angle formed by the contact surface of the lock piece and the self-locking cover are smaller than or equal to the sum of the friction angles of the lock piece relative to the contact surface of the lock column and the contact surface of the self-locking cover respectively.

Preferably, the first locking assembly further comprises a cam rod, one end of the cam rod is a handle, the other end of the cam rod is a cam, the cam is hinged with the self-locking cover and is in contact with the gland, the cam rod can move between a locking position and a disengagement position, when the cam rod is located at the locking position, the conical surface of the self-locking cover presses the locking block to be embedded into the annular locking groove, and when the cam rod is located at the disengagement position, the self-locking cover is lifted to enable the locking block to be disengaged from the annular locking groove.

Preferably, the tyre comprises: the outer tire is fixed on the outer tire, and the anti-skid nails extend out of the outer surface of the outer tire; preferably, the tyre further comprises an insulation component arranged between the inner tube and the outer casing of the tyre.

Preferably, the tyre further comprises a receptacle secured in the outer tyre, the plurality of studs being integrated on a base plate having through holes and being sleeved on the receptacle so as to be slidable relative thereto. Therefore, the utility model discloses an antiskid auxiliary wheel easily makes, and antiskid is effectual, and is little to the road surface damage moreover.

According to another aspect of the present invention, there is provided a booster-less jack for use in installing the above-described auxiliary wheel, comprising a climbing block and a supporting block which are rotatably connected, wherein the climbing block and the supporting block have a common supporting bottom surface, and the climbing block has a slope for the auxiliary wheel to climb.

According to another aspect of the present invention, there is provided a locking and unlocking tool for unlocking and locking a self-locking device used for the above-mentioned auxiliary wheel, the locking and unlocking tool being a strip shape, one end of which is an opening end for opening the self-locking device; the other end is a locking end for locking the self-locking device;

wherein the opening end is provided with two hooks side by side for hooking a fixed part on the base to rotate the locking and unlocking tool about the fixed part; two protrusions are arranged between the two hooks and used for pressing the locking block downwards during rotation; the locking end has a notch for engaging the trigger to rotate the plate wheel.

The utility model discloses a lock solid subassembly is opened and is locked conveniently, and easy operation is showing and is improving efficiency. And the volume is less than traditional spare tyre, convenient to carry, easily everyone carries the installation. The jack of the utility model has the advantages of simple structure, convenient carrying, easy use and high adaptability.

Drawings

The invention will be further described with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention and do not constitute an undue limitation on the present invention. In the drawings:

fig. 1A is a front view of a wheel (e.g., a conventional wheel) having an auxiliary wheel according to an embodiment of the present invention mounted thereon, wherein the auxiliary wheel is fixedly mounted on a hub of the wheel via the hub thereof;

FIG. 1B is a cross-sectional view A-A of the wheel shown in FIG. 1A with an auxiliary wheel according to an embodiment of the present invention installed;

fig. 2A is a front view of a wheel hub for illustrating an auxiliary wheel according to an embodiment of the present invention;

FIG. 2B is a cross-sectional view B-B of the hub of the wheel shown in FIG. 2A;

FIG. 3A is a front view of an example of an adapter module for use in an auxiliary wheel according to a preferred embodiment of the present invention;

FIG. 3B is a cross-sectional view C-C of the adapter module shown in FIG. 3A;

FIG. 3C is a rear view of the adapter module shown in FIG. 3A;

fig. 4A is a self-locking schematic diagram of a first embodiment of a self-locking device for use in a locking assembly of an auxiliary wheel according to the present invention;

fig. 4B is a schematic view of an acting force triangle according to the self-locking principle of the first embodiment of the self-locking device of the present invention;

fig. 4C and 4D are views for explaining the structure and self-locking principle of the second and third embodiments of the self-locking device in the locking assembly for the auxiliary wheel according to the present invention;

fig. 5A, 5B, 5C and 5D are a front view and a sectional view a-A, B-B, C-C, respectively, of a second embodiment of a self-locking device of a locking assembly according to the present invention;

FIGS. 6A, 6B and 6C are a front view, a sectional view A-A and a rear view, respectively, of an example of a locking assembly employing a second embodiment of the self-locking device;

FIG. 7 is a cross-sectional view A-A of a locking assembly similar to that shown in FIGS. 6A-6C, wherein a different form of stop mechanism is employed;

FIGS. 8A, 8B, 8C and 8D are a front view, and a cross-sectional view C-C, A-A, B-B, respectively, of a third embodiment of a self-locking device of a locking assembly according to the present invention;

fig. 9 is a sectional view a-a of a variation of the third embodiment of the self-locking device of the locking assembly according to the present invention, wherein the locking piece has a pentahedral shape, different from the locking piece of the third embodiment of the self-locking device;

fig. 10 is a B-B cross-sectional view of a variation of the third embodiment of the self-locking device of the locking assembly according to the present invention, wherein the locking piece is spherical, unlike the locking piece of the third embodiment of the self-locking device;

fig. 11A is a perspective view of a locking and unlocking tool (wrench) of the self-locking device according to an embodiment of the present invention;

fig. 11B is a perspective view of a locking and unlocking tool (pry bar) of the self-locking apparatus according to another embodiment of the present invention;

fig. 11C is a perspective view of a locking and unlocking tool (pry bar) of the self-locking apparatus according to another embodiment of the present invention;

12A, 12B and 12C are front, A-A and B-B cross-sectional views, respectively, of an example of a lock cylinder fixed to the wheel hub and a locking assembly locked to the lock cylinder;

fig. 13A, 13B, 13C are a perspective view, a top view and a cross-sectional view a-a, respectively, of a non-assisted jack according to an embodiment of the present invention;

figure 14A is a radial cross-sectional view of an anti-skid auxiliary wheel according to an embodiment of the present invention;

figure 14B is a radial cross-sectional view of an anti-skid auxiliary wheel according to another embodiment of the present invention; and is

FIG. 14C is a perspective view of a cleat used with the anti-skid auxiliary wheel shown in FIG. 14B.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the present invention, the auxiliary wheel is fixedly mounted on the wheel, usually on the outside of the wheel, with a common axis of rotation with the motor vehicle wheel. In particular, auxiliary wheels may be mounted and/or attached to the wheel via the hub and/or axle of the wheel, and may be used for various purposes, such as anti-skid, anti-flat, replacing a failed conventional tire, and the like. The utility model discloses can be applied to various current wheels.

When the auxiliary wheel is installed on the wheel through the wheel shaft of the wheel, one or more screws in the existing screws for fixedly connecting the wheel can penetrate through the preset screw holes in the auxiliary wheel and then be screwed into the existing screw holes in the wheel, so that the auxiliary wheel is fixed on the wheel, and the description is omitted. The way in which the auxiliary wheel is fixed by the hub of the wheel is mainly explained hereinafter.

In this document, the direction of the rotation axis of the wheel axle is defined as "axial direction", the direction of the wheel diameter is defined as "radial direction", and the plane on which the wheel diameter lies perpendicular to the axial direction is defined as "radial plane". In addition, the term "wheel inner side" is defined as: the radial surface of the wheel is taken as a reference and is closer to the side surface of the wheel axle; the term "outboard wheel" is defined as: the side surface far away from the vehicle wheel axle by taking the radial surface of the wheel as a reference; the term "conventional wheel" refers to a wheel which the motor vehicle has for normal travel, connected to a wheel axle, hereinafter also referred to simply as a wheel. The term "auxiliary wheel" as referred to herein means a wheel which can be additionally fixed to a conventional wheel of a motor vehicle, i.e. a wheel of the present invention, which can function as a spare tire, as an anti-skid function or other function; in the case of no conflict, the technical features of the auxiliary wheel can also be directly applied to conventional wheels, for example the utility model discloses a stud can be applied to conventional wheels to form the wheel that has anti-skidding function. The term "coupling channel" refers to a through hole in the hub of the wheel for fixedly connecting an auxiliary wheel, and may be a lightening hole in the hub of a conventional wheel, or a special through hole or other through holes made in the hub of a conventional wheel.

Fig. 1A, 1B are wheel views to which auxiliary wheels according to an embodiment of the present invention are mounted. As shown in fig. 1B, the wheel 2 includes a hub 12 and a tire 14. The auxiliary wheel 1 comprises a hub 11 and a tyre 13 (see fig. 1B), and one or more locking assemblies 6 fixed to the hub 11, the locking assemblies 6 being adapted to fix the auxiliary wheel 1 to the hub of a vehicle wheel, i.e. to the hub 12 of the wheel 2 shown in the figures, such that the auxiliary wheel 1 is directly driven by the hub 12 of the wheel 2, rather than by the wheel axle, it being noted that the specific construction of the locking assemblies 6 is not shown in fig. 1A and 1B, but only indicated by a block. The auxiliary wheel 1 is preferably fixed to the wheel 2 with a common axis of rotation with the wheel 2. The auxiliary wheel 1 can also replace the function of the wheel 2. Typically, the auxiliary wheel 1 is mounted on the outside of the hub 12 of the wheel 2.

The locking assembly 6 can be mounted on the through hole 16 of the hub 12 of the wheel 2, so as to fix the auxiliary wheel 1; alternatively, the locking assembly 6 cooperates with another locking assembly on the hub 12 of the wheel 2, so as to fix the auxiliary wheel 1. The utility model discloses a lock solid subassembly is made simply, and is with low costs, and is safe in utilization, convenient, swift, specifically described in the following.

Fig. 2A is a front view of a wheel hub of an exemplary wheel for illustrating an auxiliary wheel according to an embodiment of the present invention; fig. 2B is a cross-sectional view a-a (i.e., a radial cross-sectional view) of the wheel hub. As shown, a through hole (e.g., a lightening hole) 16 is typically provided in the hub 12 of the vehicle wheel 2, as shown in fig. 2A. The through-hole 16 has sidewalls 16A, 16B, 16C and 16D that complimentarily mate with the adapter modules described in detail below to conform to the adapter modules. As shown in fig. 2B, the wheel hub 12 also has an inboard wall 16E against which a stop mechanism, described in more detail below, abuts.

When the auxiliary wheel is fixed to the wheel hub by means of the through-hole in the wheel hub, the locking assembly 6 of the auxiliary wheel according to the invention preferably also has an adapter module 8 (see fig. 3A-3C) which is complementarily matched to the shape of the through-hole 16. When the auxiliary wheel 1 is attached to the wheel 2, the adapter module 8 is inserted into the through hole 16 on the wheel hub 12, and the side surfaces 8A, 8B, 8C and 8D of the adapter module 8 are attached to the side surfaces 16A to 16D of the through hole 16, so that stable attachment and positioning of the auxiliary wheel to the wheel hub are facilitated.

When the wheel 2 and the auxiliary wheel 1 are in a mutually locked state, the adapter module 8 is positioned in the through hole 16 of the hub 12 of the wheel 2, and when the wheel 2 rotates, the torsion force transmission between the wheel 2 and the auxiliary wheel 1 is realized through the matching of the side walls 16C and 16D of the through hole 16 and the side surfaces 8C and 8D on the adapter module 8; the concentric positioning of the wheel 2 and the auxiliary wheel 1 is realized by the matching of the side walls 16A and 16B of the through hole 6 and the outer side surfaces 8A and 8B on the adaptation module 8.

Fig. 3A-3C illustrate only one exemplary structure of an adapter module for use in an auxiliary wheel according to an embodiment of the present invention. It will be appreciated that in order to accommodate various shapes of through-holes 16 in a motor vehicle hub, the adaptor module 8 may have a corresponding shape that matches the through-holes 16 so that it can be inserted into the through-holes 16 and fit snugly into the through-holes 16.

Preferably, the adapter module 8 has a positioning structure 8G for cooperating with a positioning structure on the auxiliary wheel hub 11 to achieve accurate positioning of the adapter module 8 on the auxiliary wheel hub 11. Of course, the adapter module 8 may not set the positioning structure 8G, but rely on the screw hole 8F and the auxiliary wheel hub 11 to achieve accurate positioning. The adapter module 8 can be fixed to the auxiliary wheel hub 11 by various known means, including screwing, riveting, snapping, gluing, etc. Furthermore, the adapter module 8 and the auxiliary wheel hub 11 may be integrally formed.

The working principle of the locking assembly and the embodiment of the locking assembly are described below.

According to an embodiment of the present invention, the locking assembly 6 comprises a self-locking device with a continuous locking position. According to a first embodiment of the self-locking device, as shown in fig. 4A, the self-locking device comprises a base 101 having a cavity, a self-locking part 102 at least partly located in the cavity, wherein a side wall of the cavity comprises a first frictional contact surface (i.e. a locking surface) W, and a locking piece 103, wherein the self-locking part 102 has a second frictional contact surface M facing the frictional contact surface W and making an angle α with the frictional contact surface W. The lock piece 103 is disposed between and in contact with the frictional contact surfaces W and M, and the lock piece 103 may have various shapes as required, for example, a spherical shape, a cylindrical shape, a polyhedral shape, or the like. The locking assembly 6 may further comprise a retaining member (not shown in fig. 4A), which may be a spring having one end fixed to the base 101 and the other end exerting an elastic pre-load on the locking block 103 in the direction indicated by the vertex of angle α. Here, the self-locking part 102 may be in contact with the seat, but the contact surface is a smooth or substantially smooth contact surface.

In the first embodiment of the self-locking device, self-locking of the self-locking part 102 is achieved by the contact friction of the locking piece 103 with the two frictional contact surfaces W, M in the cavity of the base, i.e. the self-locking part 102 is movable in a first direction F1 relative to the base and locked in a second direction F2 opposite to said first direction, so that the self-locking part 102 can be locked in any of the successive locking positions. Here, the first direction F1 is substantially the direction indicated by the vertex of the angle α. When the lock piece 103 is moved out of contact with the at least one frictional contact surface W, M by applying a force to the lock piece 103 in a direction opposite to the direction indicated by the vertex of the angle α (in the case of a holding member, the force of the holding member on the lock piece 103 is overcome), the lock of the lock piece 103 is released and the lock of the self-locking member 102 is released, and the self-locking member 102 is movable in the second direction F2. Therefore, as long as the lock piece remains in contact with the frictional contact surface W, M without being released, the self-locking member 102 is kept locked in the second direction F2.

The self-locking theory of the first embodiment of the self-locking device is as follows:

according to the principle of self-locking, as shown in fig. 4A, the acting force of the first frictional contact surface W on the lock block 103 is R₁₃The acting force of the second friction contact surface M on the locking block 103 is R₂₃Let the elastic force of the spring on the lock block 102 be P, the included angle between P and the second friction contact surface M be beta, alpha be the included angle between the first friction contact surface W and the second friction contact surface M,

and

the friction angles of the locking piece 103 relative to the first frictional contact surface W and the second frictional contact surface M, respectively, wherein the friction angles

And

coefficient of friction mu corresponding thereto₁And mu₂Is in the relationship of

It should be noted that, depending on the application, the friction coefficient of the locking piece 103 with respect to the first and second frictional contact surfaces W and M may be the same or different, and therefore,

and

may be the same or different. In the figure, Y₁And Y₂Indicating a normal.

Referring to fig. 4B, the self-locking condition is determined according to a condition that the resistance generated during the reverse stroke is less than or equal to zero.

Finishing to obtain:

if the locking block is required not to be automatically released, P is less than or equal to 0 because

Therefore, it is not only easy to use

Namely the self-locking condition is that

That is, at an angle α less than or equal to the friction angle of the lock piece 103 with respect to the first and second frictional contact surfaces W and M, respectively

And

when is at time

The self-locking part 102 is movable in a first direction F1 relative to the base 101 and is locked in a second direction F2 opposite to the first direction, so that the self-locking part can be locked in any one of successive locking positions.

For example, in the case where the base, the self-locking member and the lock piece are made of steel, the friction angle is about 0.15 because the friction coefficient between steel and steel is about

And

are each about 8.5 deg., and therefore, the angle alpha should be less than about 17 deg.. Each component of the self-locking device may be made of different materials (e.g., metal, plastic, ceramic, etc.) as desired, the materials may be different between the various components, and even each component itself may be made of different materials.

According to the principle of the first embodiment of the self-locking device, a plurality of first embodiments of the self-locking device can be arranged on a required device, and two first embodiments of the self-locking device can be arranged symmetrically.

For example, fig. 4C and 4D are diagrams illustrating the structure and principle of the second and third embodiments of the self-locking device in the locking assembly for the auxiliary wheel according to the present invention.

As shown in fig. 4C, the second and third embodiments of the self-locking device are a combination of the first embodiment of the two self-locking devices. Specifically, the self-locking device of the present embodiment includes a base 111 having a cavity, a self-locking part 112 at least partially located in the cavity, and a first locking block 113 and a second locking block 113a, wherein a sidewall of the cavity includes first and fourth frictional contact surfaces 111W, 111M, the self-locking part 112 has second and third frictional contact surfaces 112M, 112W, the first frictional contact surface 111W faces the second frictional contact surface 112M and forms an angle α therewith, and the fourth frictional contact surface 111M faces the third frictional contact surface 112W and forms an angle α' therewith. The first lock block 113 is disposed between and in contact with the first and second frictional contact surfaces; the second lock piece 113a is disposed between and in contact with the third and fourth frictional contact surfaces. Similar to the first embodiment of the self-locking device, the self-locking device of this embodiment may also include a retaining member for applying elastic pre-load to the first and second locking blocks 113 and 113a in the directions indicated by the vertices of the angle α and the angle α', respectively.

As can be seen from the above description in connection with the first embodiment of the self-locking device, if the angle α between the first friction surface 111W and the second friction surface 112M, the friction angle of the first lock piece 113 with respect to the first and second friction contact surfaces

And

satisfy the requirement ofThe angle α' between the third friction surface 112W and the fourth friction surface 111M, the angle of friction of the second locking piece 113a with respect to the third and fourth friction contact surfaces

And

satisfy the requirement of

The self-locking part 112 can be made movable in a first direction F1 relative to the base 111 and be locked and held stationary in a second direction F2 opposite to the first direction, so that the self-locking part can be locked in any one of the successive locking positions. In addition, if the angle between the second and third frictional contact surfaces 112M, 112W is γ, the angle between the first frictional contact surface 111W and the fourth frictional contact surface 111M is γ

Through the principle, the included angle of the cavity of the base can be designed, and the self-locking component can be locked at any continuous locking position under the action of the locking block.

A second embodiment of the self-locking device for the locking assembly in the auxiliary wheel of the present invention is described below. The locking assembly provided on the hub of the auxiliary wheel may comprise a self-locking device with successive locking positions as shown in fig. 5A-5D and stop means associated with the self-locking device. This embodiment of the self-locking device comprises a base 121, a self-locking part 122 and two locking blocks 123, 123 a. Preferably, the self-locking device may further comprise a retaining member (which comprises, for example, a spring 124).

As shown in fig. 5A-5D, the base 121 is fixed to or integrally formed with the hub of the auxiliary wheel. The base 121 has a cavity, the sidewall of the cavity includes two friction contact surfaces 121W, 121M (corresponding to the first and fourth friction contact surfaces 111W, 111M in fig. 4C), the self-locking member 122 also includes two friction contact surfaces 122M, 122W (corresponding to the second and third friction contact surfaces 112M, 112W in fig. 4C), and the self-locking member 122 is disposed at least partially in the cavity of the base 121, such that the friction contact surfaces 122M, 122W of the self-locking member 122 face the friction contact surfaces 121W, 121M of the base 121, respectively. As shown in fig. 5C, the self-locking part 122 is coupled with the base 121 and can rotate relative to the base 121, for example, the self-locking part 122 is hinged on the base 121 by a pin 126. The base 121 has a function of fixing other components and/or a function of fixing itself. When the self-locking member 122 rotates relative to the base 121, the friction contact surfaces 122M and 122W are driven to move relative to the friction contact surfaces 121W and 121M, respectively. In particular, the self-locking member 122 is a plate wheel rotatably coupled to the base 121, for example by pins 126 substantially perpendicular to both sides of the plate wheel, on which the friction contact surfaces 122M, 122W are located.

The base 121 also houses two locking pieces 123, 123 a. The lock piece 123 is disposed between and in contact with the frictional contact surface 121W and the frictional contact surface 122M, and the lock piece 123a is disposed between and in contact with the frictional contact surface 121M and the frictional contact surface 122W. Here, the self-locking device including the frictional contact surfaces 121W, 122M, 121M, 122W and the locking pieces 123, 123a corresponds to the self-locking device shown in fig. 4C, and the locking pieces 123, 123a are configured such that the self-locking member 122 is movable in the first direction F1 with respect to the base 121 and is locked in the second direction F2 opposite to the first direction F1, thereby enabling the self-locking member 122 to be locked in any of the successive locking positions. By applying an external force to the locking pieces 123, 123a, the locking pieces 123, 123a can be separated from the corresponding friction contact surfaces, so that the self-locking part 122 can move along the second direction F2, thereby unlocking the self-locking part. Preferably, the angle formed by the friction contact surfaces 121W and 122M is equal to or less than the sum of the friction angles of the lock piece 123 with respect to the friction contact surfaces 121W and 122M, respectively, and the angle formed by the friction contact surfaces 121M and 122W is equal to or less than the sum of the friction angles of the lock piece 123a with respect to the friction contact surfaces 121M and 122W, respectively.

The inner frictional contact surfaces 121W and 121M of the base 121 and the both side frictional contact surfaces 122M and 122W of the self-locking member 122 may be annular with the pin 126 as a center. The friction contact surface may be planar or may have other shapes that match the shape of the locking piece. Preferably, the frictional contact surfaces have a shape such that the lock pieces 123, 123a can be respectively inserted between the two frictional contact surfaces to roll or slide and contact the frictional contact surfaces as much as possible. Preferably, the cross-sectional shapes of the frictional contact surfaces 121W, 122M and the cross-sectional shapes of the frictional contact surfaces 122W, 121M are substantially complementary to the outer shapes of the locking pieces 123, 123a, respectively, to increase the contact surfaces of the locking pieces 123, 123a with the frictional contact surfaces; for example, the locking piece may be spherical and the friction contact surface may be grooved. The base 121 may be fixedly coupled to the auxiliary wheel hub 11 through the screw hole 121C thereof.

Preferably, the friction contact surface on both sides of the self-locking part 122 has an opening position groove 122B, so that the self-locking part 122 is always in an opening position before use, and the installation efficiency can be improved.

Preferably, the self-locking device may further include a spring seat 125, a spring 124, and a spring seat fixing screw 128. The spring seat 125 and the spring 124 are used to apply an elastic pre-load to the locking pieces 123, 123 a. The spring seat 125 and the base 121 may be fixed by a spring seat fixing screw 128, or the spring seat 125 may be deformed by punching to fix or fasten itself. The spring seat 125 may also be formed integrally with the base 121, in which case the screw 128 is not required. The self-locking device may further include a nut 127 for fixing the pin 126 to serve as a rotation shaft of the self-locking part 122.

The locking assembly may also include a stop device (described in detail below). In this embodiment, the self-locking member 122 is a plate wheel, and a coupling end 122D for coupling with the stopping device is provided on a rim of the plate wheel. Preferably, the plate wheel has a trigger 122C along its radial direction for applying a force thereto to rotate the plate wheel.

As shown in fig. 6A, 6B, 6C, there are shown views of an example of a locking assembly employing a second embodiment of the self-locking device. The locking assembly comprises a self-locking device fixed on the hub 11 of the auxiliary wheel and a stop device fixed on the adapter module 8. The stopping device comprises a link mechanism 120 and a stopping mechanism 110 movably coupled with the link mechanism 120, one end 110B of the stopping mechanism 110 is rotatably connected with the adapter module 8, and the other end opposite to the end 110B is used for abutting against the inner side of the wheel hub. The link mechanism 120 is configured to be movably coupled to the link connecting end 122D of the self-locking component 122 through a through hole on the hub of the auxiliary wheel, so that the movement of the self-locking component 122 in the first direction F1 in the locking assembly can cause the stopping mechanism 110 to abut against the hub of the wheel (e.g., abut against the inner side of the hub of the wheel, i.e., the side facing away from the auxiliary wheel, such as the inner side wall 16E of the hub of the wheel), thereby clamping the hub of the wheel between the self-locking device and the stopping device (e.g., the stopping mechanism; the locking of the self-locking member 122 in the second direction F2 prevents the stopping mechanism from being released from the wheel hub, so that the locking and unlocking of the stopping mechanism 110 is used to lock and release the auxiliary wheel to and from the wheel hub.

More specifically, the adapter module 8 may be fixed inside the auxiliary wheel hub 11, or may be formed integrally with the auxiliary wheel hub 11. The stop means further comprises a stop mechanism support 130 (see fig. 6B) provided in a recess 8H (see fig. 3C) of the adaptor module 8, which support 130 is fixedly mountable on the adaptor module 8 by means of a fixing screw 128. Catch mechanism 110 is hinged to catch mechanism mount 130 by catch mechanism pin 126B, and as shown in fig. 6B, the portion of catch mechanism 110 that couples with end 120A of linkage 120 is coupling portion 110A. Here, the stop means carrier 130 can be made in one piece with the adapter module 8. It is also possible to dispense with the stop means carrier 130, in which case the stop means 110 is directly hinged to the adapter module 8.

It can be seen that the adapter module 8 is provided with an opening 8E (see fig. 3A, 3E) through which the linkage 120, and/or the catch 110' (see fig. 8), and/or the self-locking element 132 (see fig. 8A) can pass.

A flexible element can be provided between the adapter module 8 and the wheel hub 12 in order to prevent damage to the wheel hub 12 by the adapter module 8, in particular damage to the wheel hub 12 which may occur as a result of squeezing, vibrations or the like during driving of the motor vehicle. The flexible member may or may not be elastic, and may for example be a rubber mat, which may be made of various flexible materials. The auxiliary wheel can also have no adapter module 8, in which case one end of the stop device 110 is directly articulated to the auxiliary wheel hub 11 or to a stop means support 130 fixed to the auxiliary wheel hub 11.

The stop means may also include means for applying a spring force to the stop mechanism 110 to keep the stop mechanism 110 disengaged from the wheel hub (i.e., in the open position) when unlocked. Such as a spring 124A, which spring 124A is fitted over the linkage 120 and rests with one end against the adapter module 8 and with the other end against the stop mechanism 110, as shown in fig. 6B.

The connecting rod mechanism and the stop mechanism are movably connected or integrally formed, and/or the connecting rod mechanism and the plate wheel are movably connected or integrally formed.

For example, fig. 7 illustrates a case where the link mechanism and the stopper mechanism are integrally formed, in which an assembly view of the adaptor module 8, the self-locking device, the stopper mechanism 110', the stopper mechanism seat 130', the torsion spring 124B, and the auxiliary wheel hub 11 is shown. In fig. 7, the stopping mechanism 110' (corresponding to the link mechanism 120 and the stopping mechanism 110 in the embodiment shown in fig. 6B) has one end 110' a directly hinged to the self-locking part 122 of the locking assembly and the other end is the locking end 110' B. One end 130'C of catch mechanism seat 130' may serve as a support point for locking end 110'B of catch mechanism 110' during locking and unlocking. The stopping mechanism seat 130' is provided with a torsion spring 124B, one end of the torsion spring 124B is fixed on the stopping mechanism seat 130', the other end is fixed on the locking end 110' B of the stopping mechanism 110', when the self-locking device is opened, the self-locking part 122 can rotate freely, at this time, the torsion spring 124B is used for pulling the locking end 110' B of the stopping part 110' to enable the locking end 110' B to be separated from the locking position of the wheel hub to be in the opening position, at this time, the concave part 110' C of the stopping mechanism 110' stops at the end part 130' C of the stopping mechanism seat 130 '.

Stop mechanism 110' is shown in FIG. 7 in a locked position with locking end 110' B of stop mechanism 110' abutting the wheel hub. To achieve this locked state, the self-locking member 122 is rotated in the locking direction F1, and the self-locking member 122 pulls the stopping mechanism 110', and the locking end 110' B of the stopping mechanism 110' abuts against the inner radial surface 16E of the wheel hub 12 supported by the end 130' C of the stopping mechanism seat 130', thereby achieving locking. During the unlocking process, when the locking assembly is unlocked, the self-locking member 122 can rotate freely along the unlocking direction F2, and the stopping mechanism 110' returns to the unlocking position under the elastic force of the torsion spring 124B.

It should be noted that the stop mechanism may be of any form as long as it can abut against the wheel hub under the drive of the link mechanism.

Fig. 8A to 8D are schematic structural views showing a third preferred embodiment of the self-locking device, which is a modification of the second preferred embodiment of the self-locking device, and the principle of the third preferred embodiment of the self-locking device is the same as that of the second preferred embodiment of the self-locking device, and the third preferred embodiment of the self-locking device can be used in an auxiliary wheel instead of the second preferred embodiment of the self-locking device. The third embodiment of the self-locking device comprises a base 131, a self-locking part 132, two locking blocks 133, 133a and a locking block sleeve (which serves as a fastening and opening part, described in detail below) 136, preferably also a retaining part (comprising, for example, a spring 134).

Generally speaking, the third self-locking device embodiment is different from the second self-locking device embodiment in that the third self-locking device embodiment adopts a different form of self-locking part 132 and adds a lock block sleeve 136, but has the same self-locking principle. For example, the base 131 has a cavity, the sidewall of the cavity includes two friction contact surfaces 131W, 131M (corresponding to the two friction contact surfaces 121W, 121M in fig. 5B), the self-locking member 132 also includes two friction contact surfaces 132M, 132W (corresponding to the two friction contact surfaces 122M, 122W in fig. 5B), and the self-locking member 132 is disposed at least partially in the cavity of the base 131, such that the friction contact surfaces 132M, 132W of the self-locking member 132 respectively face the friction contact surfaces 131W, 131M of the base 131.

The lock piece 133 is disposed between and in contact with the frictional contact surface 131W and the frictional contact surface 132M, and the lock piece 133a is disposed between and in contact with the frictional contact surface 131M and the frictional contact surface 132W. Here, the self-locking device including the frictional contact surfaces 131W, 132M, 131M, 132W and the locking pieces 133, 133a corresponds to the self-locking device shown in fig. 5B, and the locking pieces 133, 133a are configured such that the self-locking member 132 is movable in the first direction F1 with respect to the base 131 and is locked in the second direction F2 opposite to the first direction F1, thereby enabling the self-locking member 132 to be locked in any of the successive locking positions. By applying an external force to the locking blocks 133, 133a, the locking blocks 133, 133a can be disengaged from the corresponding friction contact surfaces, so that the self-locking part 132 can move along the second direction F2, thereby unlocking the self-locking part. Preferably, the angle α formed by the friction contact surfaces 131W and 132M is smaller than or equal to the friction angle of the locking piece 133 relative to the friction contact surfaces 131W and 132M, respectively

And the angle alpha' formed by the friction contact surfaces 131M and 132W is less than or equal to the friction angle of the lock piece 133a relative to the friction contact surfaces 131M and 132W

And (4) summing.

Here, the apexes of the included angles α and α' point in the direction F2. Preferably, the first and second electrodes are formed of a metal,α = α', and/or

And/or

The locking blocks 133, 133a are symmetrically disposed about the self-locking part 132.

In this embodiment, the lock block sleeve 136 is disposed in the cavity of the base 131, and the self-locking member 132 extends through the lock block sleeve 136. The locking pieces 133 and 133a are fitted into holes formed in the side walls of the locking piece sleeve 136, so that the locking pieces 133 and 133a can be manipulated by the locking piece sleeve 136 and the irregular rolling of the locking pieces 133 and 133a can be restricted. A locking block sleeve may be provided between the locking block sleeve 136 and the locking blocks 133, 133a for preventing the locking blocks 133, 133a from falling out when the self-locking part 132 is removed. Where the locking piece 133, 133a is cylindrical and the hole in the locking piece sleeve 136 has a complementary shape.

The self-locking device can be unlocked and locked through the locking block sleeve 136. For example, as shown in fig. 8A, in the longitudinal direction (i.e., in the directions of F1 and F2), one end of the lock block sleeve 136 has a flange on which a fastening pry face 136A is provided, the lock block sleeve 136 can be moved in the direction of F2 by pressing down the fastening pry face 136A, and one end of the self-locking member 132 has a fastening support face 132A, the self-locking member 132 can be moved in the direction of F1 by lifting up the fastening support face 132A, and the fastening pry face 136A faces the fastening support face 132A. In the locking process of the self-locking device, the prying bars 7B and 7C (shown in fig. 11B and 11C) can be inserted between the fastening pry surface 136A and the fastening support surface 132A, and in the prying process of the prying bars, due to the lever principle, the prying bars can press down the fastening prying surface 136A and lift up the fastening support surface 132A, so that the self-locking component 132 is lifted up along the direction F1, the locking block sleeve 136 presses down the two locking blocks 133 and 133a, the two locking blocks 133 and 133a are tightly clamped between the corresponding friction contact surfaces 131W and 132M and between the friction contact surfaces 131M and 132W respectively, and the self-locking component cannot exist in the locking process of the self-locking device, so that the deformation of the self-locking component and the material of the base are completely absorbed. The lock block sleeve 136 also has an opening abutment 136B, the lock block sleeve 136 can be moved in the direction F1 by lifting the opening abutment 136B, and the base 131 or other component fixed to the base 131, such as the spring seat 135, can have an opening pry surface 135B, the opening abutment 136B facing the opening pry surface 135B. During the opening process of the self-locking device, the prying bars 7B and 7C (shown in fig. 11B and 11C) can be inserted between the opening support surface 136B and the opening pry surface 135B, and during the prying process of the prying bars, due to the lever principle, the prying bars can lift the opening support surface 136B, so that the lock block sleeve 136 drives the two lock blocks 133 and 133a to move along the direction F1, and thus the two lock blocks 133 and 133a release the self-locking component 132, so that the self-locking component 132 can move along the direction F2, and naturally can also move freely along the direction F1. In addition, as a modification of the opening support surface 136B, an opening prying hole 136D may be provided on the lock block sleeve 136, and the opening and locking functions of the lock block sleeve 136 may also be realized by a corresponding prying tool, which is not described herein again. The "prying surface" and the "support surface" referred to herein may be changed to a "prying point" or a "fulcrum" as required.

In the third embodiment of the self-locking device, a spring seat 135 may also be provided, which may be fixed to the base or formed integrally with the base. A spring 134 is fixed to the spring seat 135 and applies a spring force to the locking blocks 133 and 133a to help keep the locking blocks 133 and 133a in contact with the self-locking member 132 and the base 131 while preventing foreign objects from entering the cavity of the base. The spring retainer snap 135A is snap-fit to the base 131 or otherwise attached thereto.

Similarly, the self-locking part 132 may be used in combination with the stop means and the adapter module described in relation to the second embodiment of the self-locking device, such that movement of the self-locking part 132 in the first direction F1 causes the stop means to abut against the wheel hub and the locking in the second direction F2 prevents the stop means from being released from the wheel hub. Preferably, a t-shaped thread head 132C is arranged at one end of the self-locking part 132 and hinged with the stopping device; alternatively, the self-locking member 132 may be provided with a stopper portion at one end thereof, which itself serves as a stopper mechanism capable of being locked to the wheel hub.

If necessary, the two locking pieces 133, 133a may have a pentahedral shape (the cross section thereof is approximately trapezoidal), as shown in fig. 9, and the contact of the locking pieces 133', 133a' with the self-locking part 132 and the base 131 is a surface-type contact to increase the friction area. Such locking pieces 133', 133a' can reduce the amount of deformation of the frictional surface of the self-locking member 132 and the base 131. The two locking pieces 133, 133a may also be spherical, as shown in fig. 10, the self-locking device having spherical locking pieces 133 ", 133 a". The locking piece may also have other shapes, for example the cross-section of the locking piece may be triangular, trapezoidal, diamond shaped, polygonal, irregular, etc.

The spring 134 may be a leaf spring with multiple pressure points, or may be composed of several springs; the spring 134 may apply a spring force to the lock block sleeve 136 and/or to both lock blocks 133, 133a, or the spring 134 and the lock block sleeve 136 may apply a force to both lock blocks 133, 133a together. The spring can be fixed between the base and the locking block and also between the base and the locking block sleeve. The spring may have various forms, such as a torsion spring, a plate spring, and the like.

A protrusion 136C may be further provided between both ends of the lock block sleeve 136 in the longitudinal direction (i.e., the directions F1 and F2), as shown in fig. 8C, and the protrusion 136C is used to keep the lock block sleeve at a certain position relative to the base when the self-locking device is in the unlocked state. Specifically, when the protruding portion 136C reaches the outside of the base 131 by lifting the opening pry surface 136B of the lock sleeve 136 with a tool, the spring 134A in the cavity of the base 131 pushes the lock sleeve 136 to incline toward the side where the protruding portion 136C is provided, so that the protruding portion 136C is caught on the opening pry surface 135B of the base 131 or the spring seat 135, and the third embodiment of the self-lock device is always in the open state.

The base 131 can be provided with a fixed seat, and the fixed seat is used for being hinged, screwed or fixed with the auxiliary wheel hub 11 in other modes; the base 131 may also be formed integrally with the auxiliary wheel hub 11.

The self-locking member 132 may be provided with an opening groove 132B, and in the opened state, the locking pieces 133 and 133a stay in the opening groove 132B to ensure that the self-locking member 132 is not self-locked when the self-locking device is vibrated. The prying tool may also catch the opening groove 132B to pry the self-locking member 136.

In addition, the self-locking device, the auxiliary wheel hub 11 and the adapter module 8 can be fixed together in sequence by bolts. In the self-locking device shown in fig. 8A-8D, in the case where the self-locking part 132 directly serves as a stopper mechanism, when locking is performed, the auxiliary wheel 1 is abutted against the wheel 2, the adapter module 8 is inserted into the lightening hole 16 of the wheel, the t-shaped wire head 132C of the self-locking part 132 is inserted into the lightening hole 16 through the through hole of the adapter module as a locking end, and when the self-locking part 132 is locked in the direction F1, the t-shaped wire head 132C abuts against the inner radial surface 16E of the wheel hub 12, so that the wheel 2 and the auxiliary wheel 1 are locked together. After the self-locking device is unlocked, the t-shaped head 132C is disengaged from the inner radial surface 16E of the wheel hub 12, and the auxiliary wheel 1 can be separated from the wheel 2.

The tools for opening and locking the self-locking device described above are described below with reference to fig. 11A-11C.

A wrench 7A as shown in fig. 11A may be used to open and lock the second embodiment of the self-locking device. The wrench 7A is a long strip, one end of which is an opening end 72 for opening the self-locking device; the other end of the wrench 7A is a locking end 74 for locking the self-locking device. Two hooks 78 are arranged on two sides of the opening end 72 side by side, and two protrusions 76 are arranged between the two hooks 78; the locking end 74 has a notch. To open the self-locking device, the two hooks 78 of the opening end 72 are hooked on two ends of a screw 127 (shown in fig. 5A) of the self-locking device, respectively, so that the wrench 7A can rotate about the screw 127; then, the two protrusions 76 of the wrench 7A are pressed against the locking pieces (including all the locking pieces in the second embodiment) of the second embodiment of the self-locking device, and the wrench 7A is rotated in the direction F1, so that the protrusions 76 press the locking pieces away from the locking position, and the self-locking part 122 is unlocked. To lock the self-locking device, the locking end 74 of the wrench 7A is used to engage the locking end 74 with the trigger 122C of the self-locking member 122, and the wrench 7A is rotated in the locking direction F1 to bring the second embodiment of the self-locking device into any locking position.

The pry bars 7B, 7C as shown in fig. 11B, 11C can be used to open and lock the third embodiment of the self-locking device.

One end of the pry bar 7B is provided with two pairs of arc-shaped claws, wherein one pair of arc-shaped claws is provided with a locking pry point 71 and a locking fulcrum 73, the other pair of arc-shaped claws is provided with a locking pry point 77 and a locking fulcrum 75, and the two pairs of arc-shaped claws are opposite to each other in pairs to form a roughly circular shape. Each pair of arc-shaped claws has a certain interval, and the intervals of the arc-shaped claws are different. The pry bar 7C has a pair of claws at each end, each pair of claws having a spacing therebetween, the spacing of each pair of claws being different, wherein one pair of claws has two lock pry points 71 'and two lock pry surfaces 73', and the other pair of claws has two lock pry points 77 'and two lock pry surfaces 75'. The claws of the pry bars 7B and 7C can be inserted between the fastening pry surface 136A of the lock block sleeve 136 and the fastening support surface 132A of the self-locking part 132, or between the opening support surface 136B of the lock block sleeve 136 and the opening pry surface 135B, so that the opening and the locking of the third embodiment of the self-locking device are realized.

The prys 7B, 7C may have different forms as long as the effects of pressing down the lock block sleeve 136 and lifting the self-locking member 132 and lifting the lock block sleeve 136 with respect to the base 131 can be achieved.

The wrench 7A and the pry bars 7B and 7C can also be modified into a hydraulic or pneumatic device according to the sizes of the second self-locking device embodiment and the third self-locking device embodiment, and the opening and the locking are implemented by using the force of hydraulic or pneumatic pressure.

In order to achieve the coaxial connection between the wheel 2 and the auxiliary wheel 1, in addition to utilizing the existing channel on the wheel hub 12, a device for cooperating with the locking assembly may be fixedly arranged on the wheel hub 12, and the locking assembly is fixedly connected to the device, so that the auxiliary wheel 1 and the wheel hub 12 are coaxially connected. While this approach requires modification or special design and manufacture of the hub 12 of the existing wheel 2, the ease of mounting and dismounting the auxiliary wheel is greatly enhanced.

In one example, the self-locking part of the self-locking device can be used as a lock cylinder, and the auxiliary wheel can be locked or released relative to the wheel hub through locking and releasing of the self-locking part relative to the base. For example, when the base 131 is fixed to the auxiliary wheel hub 11 by using the self-locking member 132 as a lock cylinder fixed to the wheel hub 12, the auxiliary wheel can be locked or released from the wheel hub by self-locking and unlocking the self-locking member 132 with respect to the base 131. Preferably, the base is cylindrical; the lock cylinder is cylindrical, and the diameter of the cross section of the root part of the lock cylinder is smaller than that of the end part of the lock cylinder; the locking piece is spherical.

In another example, shown in fig. 12A, 12B, and 12C, a single locking assembly embodiment is provided for locking a cylinder 12A on a wheel hub 12, the cylinder 12A having an annular locking groove 12B. The locking assembly of the present embodiment includes: lock piece sleeve 11A, lock piece 43, self-locking cover 41, elastic component 44 and gland 45.

The lock block sleeve 11A is fixed on the auxiliary wheel hub 11 or integrally formed with the auxiliary wheel hub 11 and is used for being sleeved on the lock column 12A around the lock column 12A, lock block holes 11B which are the same as the number of the lock blocks 43 and correspond to the positions of the annular lock grooves 12B are formed in the side wall of the lock block sleeve 11A, and the lock blocks 43 are embedded in the lock block holes 11B. The self-locking cover 41 is disposed around the lock block sleeve 11A, and a contact surface facing the lock block 43 is a conical surface. Preferably, the pressing cover 45 is fixedly disposed on the locking block sleeve 11A, and the elastic member 44 is disposed between the pressing cover 45 and the self-locking cover 41 for providing an elastic force for pressing the locking block 43 by the tapered surface of the self-locking cover 41 to be inserted into the annular locking groove 12B.

The lock cylinder 12A may also be formed integrally with the wheel hub 12.

Preferably, the embodiment of the locking assembly may further include a cam lever 42, one end of the cam lever 42 is a handle, and the other end is a cam, which is hinged to the self-locking cover 41 by a pin 46 and contacts with the gland 45, so that when the cam rotates about the pin 46 by rotating the handle, the self-locking cover 41 can be lifted and pressed (by using an elastic member 44) relative to the gland 45, so that the self-locking cover 41 presses or releases the locking block 43, thereby switching the self-locking cover 41 between the open position and the locking position.

In this embodiment, the lock block sleeve 11A has four lock block holes 11B, but may have other numbers of lock blocks 43 and lock block holes 11B. The locking piece hole 11B is a taper hole, the diameter of the taper hole gradually decreases from the outer wall to the inner wall of the locking piece sleeve 11A, and the minimum diameter of the taper hole is slightly smaller than the diameter of the locking piece 43, so that the locking piece 43 cannot penetrate through the locking piece sleeve 11A.

In this embodiment, the locking piece 43 is spherical, and the locking piece 43 may also be of different shapes, such as an oval shape.

Preferably, the inner conical surface of the self-locking cover 41, the surface of the locking groove 12B on the lock cylinder 12A and the locking piece 43 form the first embodiment of the self-locking device, that is, the inner conical surface of the self-locking cover 41 corresponds to the first frictional contact surface in the first embodiment of the self-locking device, the locking piece 43 corresponds to the locking piece, and the surface of the locking groove 12B corresponds to the second frictional contact surface of the self-locking part, wherein the apex of the included angle formed by the inner conical surface of the self-locking cover 41 and the surface of the locking groove 12B is generally directed to the direction from the wheel to the auxiliary wheel, so that the locking piece 43 can only move towards the wheel side direction, but can not move along the opposite direction. Since the lock block 43 is embedded in the lock block sleeve 11A, the lock block sleeve 11A can only move towards the wheel side direction, so that the wheel and the auxiliary wheel are locked together. When a gap is formed between the wheel and the auxiliary wheel due to a shock during the driving of the vehicle, the gap is automatically absorbed by the principle of the self-locking device and the function of the elastic member 44, so that the locking between the wheel and the auxiliary wheel is more and more tight.

In practical use of the locking assembly, to achieve locking, the auxiliary wheel and the wheel are abutted together, the lock block sleeve 11A is sleeved on the lock cylinder 12A, the cam rod 42 is pressed down to be in the locking position, the self-locking cover 41 is pressed down by the cam rod 42 and the elastic component 44, the lock block 43 passes through the lock block hole 11B on the lock block sleeve 11A to abut against the lock groove 12B of the lock cylinder 12A, so that the lock cylinder 12A and the lock block sleeve 11A are locked together, and the wheel and the auxiliary wheel are fixed together. To effect unlocking, the cam lever 42 is rotated to the unlocked position, thereby lifting the self-locking cover 41 to the unlocked position against the elastic force of the elastic member 44, and since the self-locking cover 41 is no longer pressed against the locking piece 43, the locking piece 43 is in a free state, thereby contacting the locking of the lock cylinder 12A and the locking piece sleeve 11A, and the auxiliary wheel can be freely removed from the wheel.

In practical applications, one or more of the locking assemblies may be used to further stabilize the locking of the wheels with the auxiliary vehicle.

In addition to the above-described locking of the wheels with the auxiliary wheels by the self-locking device, the following simple locking method may be adopted for a specific and special-purpose vehicle.

The first method is as follows: a screw with a back hook is adopted, and the back hook of the screw passes through the through hole 16 and is hooked on the hub 12 of the wheel 2. The screw rod passes through the mounting hole of auxiliary wheel 1 and fixes, realizes through the coaxial fixed connection of bolt with auxiliary wheel 1 and wheel 2.

The second method comprises the following steps: using some or all of the set screws on the wheel hub 12. The hub 11 of the auxiliary wheel 1 is provided with fixing screw holes corresponding to the wheel hub 12. During installation, the fixing screws on the wheel hub 12 are removed or partially removed, the auxiliary wheel 1 is attached to the wheel 2, the fixing screws on the wheel 2 are inserted into the fixing screw holes of the auxiliary wheel 1, and the screws are fixed again, so that the auxiliary wheel 1 is fixed on the wheel 2.

A non-assisted jack for use with the locking assembly of the present invention will be described with reference to fig. 13A, 13B and 13C.

The problem of lifting the wheel 2 when the auxiliary wheel 1 needs to be mounted is conveniently solved by using a non-assisted jack 5 as shown in fig. 13A. The non-assisted jack 5 comprises a support block 52 and a climbing block 51, and the support block 52 and the climbing block 51 are rotatably connected together through a pin 56. The climbing block 51 can rotate around a pin 56, when the jack 5 without the aid is used, the climbing block 51 is opened, the climbing block 51 and the supporting block 52 have the same bottom surface to be contacted with the ground, and the climbing block 51 has a slope and rolls along the climbing block 51 to climb, and then rolls on the supporting block 52; when not in use, the climbing block 51 is folded, thereby reducing the volume of the non-power jack 5 and being convenient to carry. The climbing block 51 may be substantially triangular. The climbing block 51 may be made of a material having elasticity such as rubber, and protrusions may be provided on a surface contacting with the wheel and a surface contacting with the ground to increase friction. Grooves may be formed in the support blocks 52 to facilitate securing the wheels. In order to smoothly drive the jack 5 without assistance on a smooth road surface, a flexible pad may be laid on the climbing block 51. The flexible gasket is longer than the climbing block 51. The wheels are firstly rolled on the flexible gaskets, so that the vehicle can smoothly run on the climbing block.

The auxiliary wheel 1 may replace or assist the conventional wheel 2 to perform a specific function. For example, when the vehicle cannot normally run due to a tire failure, this auxiliary wheel 1 can be used as a spare tire so that the vehicle can normally run to a maintenance station; in order to drive on ice or snow, the auxiliary wheel 1 has a structure with an anti-skid function; the auxiliary wheel 1 has a configuration with an off-road function for off-road driving. The auxiliary wheel 1 may have a solid tire, a vacuum tire or a composite tire.

For example, the following specifically describes the structure of an auxiliary wheel having an anti-skid function.

Fig. 14A shows the staple type antiskid auxiliary wheel 141. The spike type antiskid auxiliary wheel 141 includes a hub and a tire, and the tire includes: an inner tube 94, an outer tire 92, a spacer member 93 and cleats 91. The studs 91 are fixed to the outer tube 92, and the spacer 93 is annular and is disposed between the inner tube 94 and the outer tube 92 and abuts against the inner wall of the outer tube 92 to prevent and protect the studs or stud seats from damaging the inner tube. The spacer member 93 may be omitted if the studs 91 and stud receptacles are designed so as not to damage the tube. The heel of the stud 91 has a cap and is located inside the casing 92, and the tip of the stud 91 protrudes from the outer surface of the casing 92.

The auxiliary wheel 141 may also have a solid tire to which the stud is fixed. The antiskid auxiliary wheel can also be provided with a hollow tire without an inner tube.

Figure 14B shows the mounting cooperation of an alternative studded tyre cleat with a cleat and figure 14C shows the configuration of the cleat used. The antiskid device shown in fig. 14C includes: studs 91 and stud receptacles 98. In this embodiment, a plurality of cleats 91 are integrally fixed to a base plate having a through hole. The anti-skid stud seat 98 is used for being fixed on the auxiliary wheel outer tire 92 and comprises a connecting column and a base 98B, the diameter of the connecting column is smaller than that of the base 98E and is fixed on the base 98B, a connector 98A is further arranged on the connecting column, and the connector 98A can be connected with the connecting column in various forms, such as riveting, screw connection, buckling connection and the like. The tie bar of the cleat seat 98 can be passed through the base plate and then the connector 98A is secured to the tie bar. The cleat seats 98 ensure that the cleats 91 are installed on the non-slip tire and that the cleats 91 do not fall off the non-slip tire during operation, while allowing the base plate of the cleats 91 to slide up and down relative to the connecting rods of the cleat seats 98.

While fig. 14B-14C show cleats 91 as four-headed, cleats 91 may be one-headed, two-headed, or multi-headed. The antiskid nails can be inserted into ice and snow and muddy road surfaces and other road surfaces influencing normal control of the wheels, and the antiskid effect is achieved.

The cleats shown in fig. 14B-14C are movable relative to the cleat receptacles. The pressure to the road surface can be adjusted to mobilizable antiskid nail, increases anti-skidding effect, also can reduce the damage to the road surface.

The studs on the anti-skid auxiliary wheels can also be designed to be hollow. The tail end of the hollow antiskid nail is small in diameter, the root part connected with the base plate is large in diameter, ice and snow or sundries enter from the tail end of the hollow antiskid nail and then are discharged from the side outlet, and therefore the antiskid efficiency of the hollow antiskid nail for pricking the ground each time is improved.

The auxiliary anti-skid auxiliary wheel 1 and the wheel 2 of the motor vehicle jointly play an anti-skid role. To prevent the studs 91 from damaging the road surface, the ends of the studs 91 of the anti-skid auxiliary wheel 1 do not exceed the outer diameter of the wheel 2. The air pressure of the wheels 2 or the anti-skid auxiliary wheels 1 can be adjusted according to the condition of the ice and snow road surface, the anti-skid nails 91 are used according to the principle that the road surface can be effectively grasped without damaging the road surface, so that when the motor vehicle runs, the wheels 2 are firstly contacted with the ice and snow road surface and sundries such as bricks, stones and the like on the road surface, the anti-skid auxiliary wheels 1, the anti-skid nails 91 and the road surface are protected, the anti-skid function of the anti-skid wheels 1 is not influenced, and the oil consumption can be reduced.

The fixed nail type antiskid auxiliary wheel, the movable nail type antiskid auxiliary wheel and the hollow antiskid nail type antiskid auxiliary wheel can also be solid tires.

The foregoing detailed description of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Many modifications and variations are possible in light of the above teaching. The described embodiments are presented to better explain the principles of the invention and its practical application to thereby enable others skilled in the art to best utilize the invention. The scope of the invention is to be defined by the appended claims.

Claims (30)

1. An auxiliary wheel comprising a hub and a tyre, characterized by comprising one or more first locking assemblies on the hub for securing the auxiliary wheel to the hub of a motor vehicle wheel with a common axis of rotation with the wheel such that the auxiliary wheel is driven by the hub of the wheel.

2. The auxiliary wheel of claim 1, wherein the first locking assembly is for securing the auxiliary wheel to the hub of the wheel through a through hole in the hub of the wheel; alternatively, the first locking assembly is configured to connect with a second locking assembly located on the hub of the wheel, thereby mounting the auxiliary wheel to the hub of the wheel.

3. The auxiliary wheel according to claim 2, wherein the first locking assembly comprises a stop means and a self-locking means with successive locking positions,

wherein, self-lock device includes:

a base having a cavity, a sidewall of the cavity including a first frictional contact surface and a fourth frictional contact surface, the base being fixed to or integrally formed with a hub of the auxiliary wheel;

a self-locking component having a second frictional contact surface and a third frictional contact surface, the self-locking component configured to be at least partially positioned within the cavity such that the second frictional contact surface faces the first frictional contact surface and the third frictional contact surface faces the fourth frictional contact surface;

a first lock piece disposed between and in contact with the first and second frictional contact surfaces and a second lock piece disposed between and in contact with the third and fourth frictional contact surfaces; the first locking piece and the second locking piece are configured to enable the self-locking part to be movable relative to the base along a first direction and to be locked in a second direction opposite to the first direction, so that the self-locking part can be locked in any continuous locking position;

movement of the self-locking member in a first direction causes the stop means to abut against the hub of the wheel, thereby sandwiching the hub of the wheel between the self-locking means and the stop means, and locking of the self-locking member in a second direction prevents the stop means from disengaging from the hub of the wheel.

4. The auxiliary wheel according to claim 3, wherein the angle between the first and second frictional contact surfaces is α, the angle between the fourth and third frictional contact surfaces is α ', and the friction angles of the first lock piece with respect to the first and second frictional contact surfaces are α', respectively

Andthe friction angles of the second locking piece relative to the third friction contact surface and the fourth friction contact surface are respectively

And

wherein,

and is

5. The auxiliary wheel of claim 4, wherein 0< α ≦ 17 ° and 0< α' ≦ 17 °.

6. The auxiliary wheel of claim 5, wherein a = a',

and is

7. The auxiliary wheel according to claim 3, wherein the self-locking device further comprises a retaining member for applying a force to the first and second locking pieces such that the first locking piece remains in contact with the first and second frictional contact surfaces and the second locking piece remains in contact with the third and fourth frictional contact surfaces when the self-locking member is locked in the locked position.

8. The auxiliary wheel of claim 7, wherein the retaining member includes a spring and a lock block sleeve extending through the cavity, the self-locking member extending through the lock block sleeve, a sidewall of the lock block sleeve having a first aperture adapted to receive the first lock block and a second aperture to receive the second lock block;

the spring is positioned in the cavity and applies elasticity to the first locking block and the second locking block; or

The spring is located outside the base and exerts elasticity on the lock block sleeve, a flange is arranged at the end of the lock block sleeve, and the spring is arranged between the outer surface of the base and the flange of the lock block sleeve.

9. The auxiliary wheel according to claim 2, wherein the first locking assembly comprises a stop means and a self-locking means with successive locking positions,

wherein, self-lock device includes:

a base having a cavity, the side wall of the cavity including a first frictional contact surface, and the base being fixed to or formed integrally with the hub of the auxiliary wheel;

a self-locking component having a second frictional contact surface, the self-locking component configured to be at least partially positioned within the cavity, the second frictional contact surface facing the first frictional contact surface;

a first lock piece disposed between and in contact with the first and second frictional contact surfaces; the first locking block is configured to enable the self-locking part to be movable relative to the base in a first direction and to be locked in a second direction opposite to the first direction, so that the self-locking part can be locked in any of the continuous locking positions;

movement of the self-locking member in a first direction causes the stop means to abut against the hub of the wheel, thereby sandwiching the hub of the wheel between the self-locking means and the stop means, and locking of the self-locking member in a second direction prevents the stop means from disengaging from the hub of the wheel.

10. The auxiliary wheel of claim 9, wherein an included angle between the first and second frictionally interactive faces is less than or equal to a sum of frictional angles of the first lock piece relative to the first and second frictionally interactive faces, respectively.

11. The auxiliary wheel of claim 10, wherein an included angle between the first and second frictionally interactive faces is less than or equal to 17 °.

12. The auxiliary wheel according to claim 10, wherein the self-locking device further comprises a retaining member for applying an elastic force to the first lock piece such that the first lock piece remains in contact with the first and second frictional contact surfaces when the self-locking device is locked in the locked position.

13. An auxiliary wheel according to any of claims 3-12, wherein there is a groove on the friction contact surface matching the shape of the locking piece, along which groove the locking piece runs.

14. The auxiliary wheel according to any of claims 3-12, wherein the base, the self-locking part and the locking block are made of steel.

15. The auxiliary wheel according to claim 3, wherein the self-locking member is a plate wheel rotatably coupled with the base and rotatable in the first and second directions.

16. The auxiliary wheel according to claim 15, wherein the plate wheel has a trigger thereon in a radial direction thereof for rotating the plate wheel.

17. An auxiliary wheel according to any of claims 3-12, wherein the stop means comprises a linkage mechanism and a stop mechanism coupled to the linkage mechanism, wherein the linkage mechanism is adapted to be coupled to the self-locking part through a through hole in the auxiliary wheel hub, such that movement of the self-locking part in the first direction urges the stop mechanism against a side of the wheel hub facing away from the auxiliary wheel.

18. The auxiliary wheel according to claim 17, wherein the linkage mechanism and the stopping mechanism are movably coupled or integrally formed and/or the linkage mechanism is movably coupled or integrally formed with the self-locking part.

19. The auxiliary wheel of claim 18, wherein one end of the catch mechanism is rotationally coupled relative to the hub of the auxiliary wheel when the linkage mechanism is operatively coupled to the catch mechanism, the other end of the catch mechanism being adapted to abut against or disengage from the hub of the wheel upon actuation of the linkage mechanism.

20. The auxiliary wheel of claim 19, wherein the stopping means further comprises means for applying a spring force to the stopping mechanism to automatically disengage the wheel hub when unlocked.

21. The auxiliary wheel of claim 18, wherein the first locking assembly further comprises an adapter module having a shape complementary to the through-hole of the wheel hub and fitting into the through-hole when the auxiliary wheel is secured to the wheel hub.

22. The auxiliary wheel of claim 21, wherein one end of the stopping mechanism is rotationally coupled with the adapter module and the other end of the stopping mechanism is adapted to abut against a hub of the wheel upon actuation of the self-locking component.

23. The auxiliary wheel of claim 2, wherein the second locking assembly is a lock cylinder; the first locking assembly is used for locking the lock cylinder.

24. The auxiliary wheel of claim 23,

the lock cylinder is provided with an annular lock groove;

the first locking assembly includes: a locking block sleeve, a locking block, a self-locking cover, an elastic component and a gland,

the locking piece sleeve is fixed on the auxiliary wheel hub or integrally formed with the auxiliary wheel hub and is used for surrounding the locking piece and being sleeved on the locking piece, the side wall of the locking piece sleeve is provided with locking piece holes corresponding to the number of the locking pieces and the position of the annular locking groove, the locking piece holes are used for embedding the locking pieces, the self-locking cover is arranged around the locking piece sleeve, the contact surface facing the locking pieces is a conical surface, the pressing cover is fixedly arranged on the locking piece sleeve, and the elastic component is used for providing elastic force for enabling the conical surface of the self-locking cover to press the locking pieces to be embedded into the annular locking groove.

25. The auxiliary wheel according to claim 24, wherein an included angle formed by the contact surface of the lock piece with the lock cylinder and the contact surface of the lock piece with the self-locking cover is smaller than or equal to the sum of friction angles of the lock piece with respect to the contact surface of the lock cylinder and the contact surface of the self-locking cover, respectively.

26. The auxiliary wheel according to claim 24 or 25, wherein the first locking assembly further comprises a cam lever having a handle at one end and a cam at the other end, the cam being hinged to the self-locking cover and contacting the pressing cover, the cam lever being movable between a locking position in which the tapered surface of the self-locking cover presses the locking piece to fit into the annular locking groove and a release position in which the self-locking cover is lifted to disengage the locking piece from the annular locking groove.

27. The auxiliary wheel of claim 3, wherein the tire comprises: the tyre comprises a tyre casing and anti-skid nails fixed on the tyre casing and extending out of the outer surface of the tyre casing.

28. The auxiliary wheel of claim 27, wherein the tire further comprises an isolation component disposed between an inner tube and an outer tire of the tire.

29. The auxiliary wheel of claim 27, wherein the tire further comprises a receptacle secured within the outer tire, the plurality of studs being integrated into a base plate having through holes and being received in the receptacle so as to be slidable relative thereto.

30. A locking and unlocking tool for unlocking and locking the self-locking device for the auxiliary wheel according to claim 15, wherein the locking and unlocking tool is elongated and has an opening end at one end thereof for unlocking the self-locking device; the other end is a locking end for locking the self-locking device;

wherein the opening end is provided with two hooks side by side for hooking a fixed part on the base to rotate the locking and unlocking tool about the fixed part; two protrusions are arranged between the two hooks and used for pressing the locking block downwards during rotation; the locking end has a notch for engaging the trigger to rotate the plate wheel.

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