CN210971418U

CN210971418U - Bicycle and chain shifter thereof

Info

Publication number: CN210971418U
Application number: CN201921603317.9U
Authority: CN
Inventors: 刘春生; 彭国鹏
Original assignee: Zhuhai Diruile Technology Co ltd
Current assignee: Zhuhai Blueprint Sports Technology Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-07-10
Anticipated expiration: 2029-09-25

Abstract

The utility model relates to the technical field of bicycle, a bicycle derailleur is disclosed, include four-bar linkage subassembly and articulate the chain subassembly of opening on four-bar linkage subassembly, be equipped with the hinge seat on the four-bar linkage subassembly, it includes to open the chain subassembly: the outer guide plate is fixedly arranged on the hinge seat and extends obliquely downwards; the inner guide plate is fixedly connected to the side surface of the outer guide plate; the rotating arm is rotatably connected between the outer guide plate and the inner guide plate, and a reset assembly is arranged at the rotating connection position of the rotating arm; and the tensioning wheel is rotationally connected to the rotating arm. The outer guide plate and the rotating arm are arranged in an inclined and backward extending mode, and the rotating arm is close to or attached to the bottom of the hinge seat in a tensioning state, so that the vertical distance between the rotating arm and the chain shifter is shortened, the whole chain shifter is more compact through the matching between the inner guide plate and the outer guide plate, the situation that the tensioning wheel touches the ground is avoided, and the chain shifter is firm in structure and not easy to damage.

Description

Bicycle and chain shifter thereof

Technical Field

The utility model relates to a bicycle technical field, especially a bicycle and move chain ware thereof.

Background

The bicycle rear derailleur is arranged at the rear part of the bicycle and matched with the speed change line to shift the chain to complete the clutch gear shifting process among different flywheels. The existing chain shifter consists of a four-bar linkage assembly and a chain stretching unit, and a speed changing line pulls the four-bar linkage assembly to push a guide wheel to move, so that the guide wheel pulls a chain to be meshed with different flywheels in a switching way. When the chain is switched among different flywheels, the tightness degree of the chain can be changed along with the diameter change of the different flywheels, so that a tensioning structure for tensioning the chain needs to be additionally arranged. The existing chain shifter adopts a tension pulley structure with elastic potential energy to solve the problem of the tensioning process of a chain in the gear shifting process, and when the chain is switched from a flywheel with a larger diameter to a flywheel with a smaller diameter, the tension pulley outwards tensions the chain to prevent the chain from loosening; when the chain is switched from the flywheel with the smaller diameter to the flywheel with the larger diameter, the chain overcomes the elastic potential energy of the tension wheel and is meshed to the other flywheel, and the chain is always in a proper tension state in the speed change process.

However, the fulcrum of the existing chain tensioning assembly is located at the bottom of the chain puller, the tensioning wheel in the tensioning state is located under or obliquely below the chain puller, and the distance from the fulcrum is far, so that the rocking condition of the rotating arm of the existing bicycle connected with the tensioning wheel in the riding process is easy to generate, the structural firmness of the chain tensioning assembly is poor, the tensioning wheel cannot be well protected, the condition that a chain is loosened and jumps out of a guide wheel easily occurs, and in an uneven road surface or a shifting process, the tensioning wheel is easy to contact with the ground due to the fact that the tensioning wheel is close to the ground.

SUMMERY OF THE UTILITY MODEL

In order to solve one of the technical problems, the utility model provides a firm reliable bicycle derailleur, simple structure, low in manufacturing cost, convenient operation, and the take-up pulley on the chain subassembly is difficult for touching ground.

The utility model provides a technical scheme that its technical problem adopted is: a bicycle derailleur comprising a four bar linkage assembly and a chain extending assembly hinged to the four bar linkage assembly, the four bar linkage assembly having a hinge mount thereon, the chain extending assembly comprising: the outer guide plate is fixedly arranged on the hinge seat and extends obliquely downwards; the inner guide plate is fixedly connected to the side surface of the outer guide plate; the rotating arm is rotatably connected between the outer guide plate and the inner guide plate, and a reset assembly is arranged at the rotating connection position of the rotating arm; and the tensioning wheel is rotationally connected to the rotating arm.

It can be seen from the above-mentioned scheme that the outer baffle that the slant downwardly extending set up, set up the interior baffle and the rocking arm of rotation connection on outer baffle in outer baffle side, this slant downward mode can be for preceding or backward slant downwardly extending, has shortened the perpendicular distance between rocking arm and the derailleur, makes whole derailleur compacter, has avoided the take-up pulley to touch the condition on ground and has taken place, and sound construction is not fragile.

Preferably, the four-bar linkage assembly comprises: a base; the hinge base; the wire seat is hinged to the rear side of the bottom of the base; the first end part of the outer hinge plate is hinged to the middle part of the base, and the second end part of the outer hinge plate is hinged to the upper end of the hinge seat; and the first end part of the inner hinge plate is hinged to the bottom of the base and extends outwards to form a connecting plate fixedly connected with the wire seat, and the second end part of the inner hinge plate is hinged to the lower end of the hinge seat.

Therefore, the base, the outer hinge plate, the inner hinge plate and the hinge seat form a four-bar mechanism, the inner hinge plate is fixedly connected with the guide wire seat to form a driving part, the guide wheel can swing around the base, switching and clutching of the chain among different chain wheels are achieved, and effective swinging distance of the guide wheel is guaranteed.

Preferably, the side surface of the wire guide seat is provided with a connecting seat fixedly connected with the connecting plate.

From the above, the connecting seat is the structure that the wire post is used for being connected with connecting plate fixed connection, and this design has guaranteed the rationality of the fixed connection structural design of wire post and interior flap.

Preferably, the wire guide seat is provided with a guide groove, and the base is provided with a speed change wire groove located along the outlet side of the guide groove.

Therefore, the wire guide seat is used for guiding and limiting the speed change wire, the speed change wire is prevented from being wound with other parts on the chain shifter in the process of pulling the four-bar linkage mechanism assembly, and the working reliability of the chain shifter is ensured.

Preferably, the first end of the rotating arm is rotatably connected to the ends of the inner guide plate and the outer guide plate, and the guide wheel is disposed at the second end of the rotating arm.

Therefore, the tail ends of the inner guide plate and the outer guide plate are rotation pivots of the tensioning wheel, the effective length of the rotating arm is reasonably utilized, cost materials are saved, and the structural compactness between tensioning assemblies is improved.

Preferably, the reset assembly is a torsion spring, a containing cavity is arranged in the first end part of the rotating arm, a groove for containing the first end part of the torsion spring is formed in the side wall of the containing cavity, and an inner hole for placing the second end part of the torsion spring is formed in the joint of the inner guide plate and the rotating arm.

Therefore, when the rotating arm rotates around the outer guide plate, the torsion spring provides elastic potential energy required by the rotating arm, so that the tensioning wheel can tension the chain when the chain moves, and the chain is always in a tensioning state in the whole gear shifting process.

Preferably, the tail ends of the inner guide plate and the outer guide plate are connected with the rotating arm through screws.

Therefore, the detachable connection mode between the inner guide plate and the outer guide plate is realized in a screw connection mode, and convenience in detachment among the rotating arm, the inner guide plate and the outer guide plate is guaranteed.

Preferably, one side of the hinge seat close to the guide wheel is provided with a blocking part extending along the outer edge.

It can be seen from above that, in the derailleur installation, the position setting of guide pulley is between frame and four-bar linkage subassembly, and the fender portion has certain effect of blockking to the water or mud that spatter in the process of traveling, prevents that the splash in the outside from influencing guide pulley and the chain of meshing on the guide pulley.

Preferably, the position of the rotating arm near the first end is provided with an outward bending part, and the bending part is used for staggering the bottom of the outer guide plate during the upward rotation of the rotating arm.

As can be seen from the above, if the swivel arm is disposed at the same side as the guide wheel, the swivel arm can be rotated upward to contact the guide wheel located at the upper side of the swivel arm, thereby damaging the chain and the guide wheel, and the main body of the swivel arm is disposed at the outer side of the outer guide plate through a bending part bent outward, thereby preventing the guide wheel from directly contacting the swivel arm.

In order to realize the utility model discloses a further purpose, the utility model provides a bicycle, including frame and rear derailleur, rear derailleur includes the four-bar linkage subassembly and articulates the chain subassembly of opening on the four-bar linkage subassembly, be equipped with the hinge seat on the four-bar linkage subassembly, it includes to open the chain subassembly: the inner guide plate is fixedly arranged on the hinge seat and extends obliquely downwards; the outer guide plate is fixedly connected to the side surface of the outer guide plate; the rotating arm is rotatably connected between the outer guide plate and the inner guide plate, and a reset assembly is arranged at the rotating connection position of the rotating arm; and the tensioning wheel is rotationally connected to the rotating arm.

It can be seen from the above-mentioned scheme that rear derailleur makes the take-up pulley can press close to four-bar linkage mechanism subassembly more under the tensioning state through adding an outer baffle to accord with the mechanical balance requirement, make the structure of whole bicycle compacter, simple structure, the take-up pulley can set up the oblique lower place ahead or the oblique lower rear at the guide pulley, has solved the bicycle and has taken place to take off the chain easily, jump the chain and easily touch the problem on road surface.

Drawings

The invention will be further described with reference to the following figures and examples:

FIG. 1 is a first isometric view of a preferred embodiment of the invention;

FIG. 2 is a second perspective view of a preferred embodiment of the present invention, omitting the inner guide plate;

fig. 3 is a third isometric view of a preferred embodiment of the invention;

FIG. 4 is a block diagram of a tensioning assembly of a preferred embodiment of the present invention;

fig. 5 is a fourth axis perspective view of a preferred embodiment of the invention;

FIG. 6 is a structural view of an inner guide plate according to a preferred embodiment of the present invention;

FIG. 7 is a block diagram of a bicycle in which a preferred embodiment of the present invention is implemented;

fig. 8 is a partial enlarged view at a in fig. 7.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 7 and 8 together, a preferred embodiment of a bicycle includes a frame 14, a front wheel 16, a rear wheel 13, a chain 8, a front sprocket set 9, a rear sprocket set 12, a pedal device 10, a shifter 15, a shift cable and a derailleur 7. Wherein the shifter 15 is mounted on the handlebar of the frame 14, the start end of the shift cable is connected to the shifter 15, the end of the shift cable is connected to the derailleur 7,

a pedal device 10 is mounted on the front sprocket set 9, the pedal device 10 is used for driving the front sprocket set 9 to rotate, the derailleur 7 is mounted on the rear sprocket set 12, and the chain 8 is mounted on the front sprocket set 9, the rear sprocket set 12 and the derailleur 7.

Referring to fig. 1, the derailleur comprises a four-bar linkage assembly and a chain-opening assembly, wherein the chain-opening assembly is hinged to the four-bar linkage assembly, and a speed-changing line drives the chain-opening assembly through the four-bar linkage assembly and stirs a chain, so that the chain and different chain wheels are switched and moved, and the gear-shifting process of the derailleur is realized.

Referring collectively to fig. 1-5, the four bar linkage assembly includes the following components:

the base 1 is a swinging fulcrum of the four-bar linkage assembly, and the upper end of the base 1 is hinged to the frame 14;

a hinge seat 31, the hinge seat 31 is used for installing a guide wheel 34 and is an output component of the four-bar mechanism component, the hinge seat 31 is hinged on the four-bar mechanism component,

wire seat 21, wire seat 21 articulates the rear side in base 1 bottom, be equipped with guide way 212 on wire seat 21, when the shift cable was installed on the derailleur, guide way 212 played the guide effect to the shift cable, a cardboard has set firmly on guide way 212 simultaneously, the cardboard is used for preventing the shift cable from breaking away from guide way 212, be equipped with on base 1 and be located along the shift wire casing 11 of guide way 212 outlet side, the shift cable passes shift wire casing 11 to finally fix on the derailleur through guide way 212.

The first end part of the outer hinge plate 22 is hinged to the middle position of the base 1, the top part of the base 1 is hinged to the vehicle frame, and the second end part of the outer hinge plate 22 is hinged to the hinge seat 31, so that the hinge seat 31 can rotate around the base 1;

inner hinge plate 23, the first end of inner hinge plate 23 articulates the bottom position at base 1, its first end outwards extends has a connecting plate 231 with wire seat 21 rigid coupling, connecting plate 231 accessible screw or bolted connection or other can dismantle the connected mode and be in the same place with wire seat 21 fixed connection, inner hinge plate 23 side rigid coupling has wire winding subassembly 4, wire winding subassembly 4 is used for the end of fixed variable speed line, wire winding subassembly 4 can be by the bolt, nut and gasket are constituteed, the end winding of variable speed line is on the bolt, and compress tightly fixedly through the nut, thereby make variable speed line can pull inner hinge plate 23.

A four-bar linkage mechanism is formed among the base 1, the inner hinge plate 23, the outer hinge plate 22 and the hinge base 31, and the four-bar linkage mechanism is a double-rocker mechanism, wherein the length of the outer hinge plate 22 is the same as that of the inner hinge plate 23, and therefore, the four-bar linkage mechanism is a parallel double-rocker mechanism. The four-bar linkage mechanism is adopted to ensure that the derailleur has firm and compact structure, and the structural stability is increased while the movement stroke range of the guide wheel 34 is ensured.

Referring to fig. 2, 4, 5 and 6, the zipper assembly includes the following components:

the outer guide plate 32 is fixedly arranged on the hinge seat 31 and extends obliquely downwards, the outer guide plate 32 is arranged on one side of the hinge seat 31 facing the bicycle frame, and the outer guide plate 32 can extend obliquely downwards backwards and can also extend obliquely downwards forwards;

an inner guide plate 36, which is arranged on the side surface of the outer guide plate 32, can be arranged on one side of the outer guide plate 32 facing the frame 14, and can also be arranged on the other side of the outer guide plate 32 opposite to the frame 14;

the rotating arm 33 is used for connecting the outer guide plate 32 and the tension wheel 35, is a rotating part of the tension wheel 35, is arranged at the tail ends of the outer guide plate 32 and the inner guide plate 36 through a rotating connection point of the rotating arm 33, and is provided with a resetting component at the rotating connection position, the resetting component is used for providing the tension force of the tension wheel 35, and the outer guide plate 32 and the inner guide plate 36 form a stable structure rotatably connected with the rotating arm 33;

the guide wheel 34 and the guide wheel 34 are used for shifting the chain 8, and are guiding shifting pieces of the chain 8, the guide wheel 34 is rotatably connected to one side, close to the frame, of the hinge base 31 and is arranged between the outer guide plate 32 and the inner guide plate 36, the inner guide plate 36 plays a role in stabilizing the guide wheel 34, the guide wheel 34 is meshed with the chain 8, the chain 8 is driven to move on chain wheels with different diameters through meshing parts, and the gear shifting process is achieved.

The tension wheel 35 is used for maintaining the tension of the chain wheel, is rotatably connected to the end position of the rotating arm 33, can rotate around the tail end of the outer guide plate 32, and utilizes the elastic potential energy of the torsion spring 6 to enable the tension wheel 35 to press the chain 8 downwards in the switching process of the chain 8, so that the chain 8 is always in a tension state.

It should be noted that, on the rocking arm 33 rotated and connected outer baffle 32, its rocking arm 33 need not be connected the end at outer baffle 32 and inner guide 36, only need connect the oblique downwardly extending part at outer baffle 32, alright shorten the vertical distance between take-up pulley 35 and the ground, can reach the technical effect of the utility model equally.

The side of the wire seat 21 is provided with a fixed seat 211 fixedly connected with the connecting plate 231, the fixed seat 211 is arranged on one side of the wire seat 21 close to the frame, the guide groove 212 is arranged on the wire seat 21, and the wire seat 21 is arranged on the outer side wall of the bottom of the base 1, so that the wire winding assembly 4 is just arranged at the extension of the inlet side of the guide groove 212.

The first end of the rotating arm 33 is rotatably connected to the end of the outer guide plate 32, the guide wheel 34 is disposed at the second end of the rotating arm 33, the rotating arm 33 rotates around the end of the outer guide plate 32, and the rotating arm 33 can be tightened on the bottom of the derailleur, so that the whole derailleur is more compact. Except that the pivoted arm 33 is articulated at outer baffle 32 through first end, its articulated position with outer baffle 32 still can be for the middle part position of pivoted arm 33, only needs to form take-up pulley 35 and rotates around outer baffle 32 end and take-up pulley 35 sets up the relation of connection at pivoted arm 33 lowermost end, just can reach the technical effect of the utility model.

The first end of the rotating arm 33 is provided with a containing cavity 332 for installing the torsion spring 6, the side wall of the containing cavity 332 is provided with a groove 333 for containing the first end of the torsion spring 6, the first end of the torsion spring 6 transversely protrudes out of the side wall of the torsion spring 6, the second end of the torsion spring 6 extends out of the side wall of the torsion spring 6, the containing cavity 332 is arranged between the end parts of the outer guide plate 32 and the inner guide plate 36, the end part of the inner guide plate 36, namely, the connecting part with the rotating arm 33, is provided with an inner hole 361 for fixedly arranging the second end part of the torsion spring, when the rotating arm 33 rotates around the outer guide plate 32, the relative positions of the first end and the second end part of the torsion spring 6.

The end of outer baffle 32 is equipped with the screw hole seat, and interior baffle 36 passes through the screw-thread fit relation and outer baffle 32 fixed connection of set screw and screw hole seat, and the screw hole seat is worn to establish in holding chamber 332, is equipped with circular flange 334 on the first end of rocking arm 33, is equipped with the circular recess with circular flange 334 complex in the interior baffle 36, and rocking arm 33 passes through circular flange 334 and circular recess cooperation, the screw seat realization is connected with the terminal rotation of outer baffle 32.

The side of the hinge seat 31 close to the guide wheel 34 is provided with a blocking part 311 extending along the outer edge, the blocking part 311 can be formed by integrally forming with the hinge seat 31, similarly, the outer guide plate 32 can also be formed by integrally forming with the hinge seat 31, and the blocking part 311 can be used for reducing sundries such as splashed water or sludge from entering the guide wheel 34, washing off the engine oil on the guide wheel 34 or the chain 8, and influencing the meshing and lubricating effects of the guide wheel 34 and the chain 8.

A bent part 331 which is bent outwards is arranged on the rotating arm 33 at a position close to the first end of the rotating arm, the bent part 331 enables the rear half part of the rotating arm 33 to be close to the inner side of the vehicle frame, the bent part 331 enables the rotating arm 33 to be staggered with the bottom of the outer guide plate 32 in the rotating process, the rotating arm 33 can be close to or attached to the bottom of the hinge seat 31 when rotating upwards, and the guide wheel 34 and the tension wheel 35 are positioned on the same vertical plane, so that the chain 8 is accurately meshed with the guide wheel 34 and the tension wheel 35.

The end of the outer guide plate 32 is provided with a hinge plate 322 which is reversely deviated from the bending part 331, the hinge plate 322 is arranged at the end of the outer guide plate 32 through a bending part 321, the first end of the rotating arm 33 is rotatably connected on the hinge plate 322, the hinge plate 322 is a connecting part of the outer guide plate 32 and the rotating arm 33, and the bending part 321 is matched with the bending part 331 to stagger the outer guide plate 32 and the rotating arm 33.

Referring to fig. 7 and 8, fig. 7 is a structural diagram of the present invention implemented on a bicycle, and the rider shifts the transmission on the handlebar on the rear wheel of the bicycle, and the transmission utilizes the shift cable to push the four-bar linkage assembly to move the guide wheel 34, and further the switching chain 8 is engaged on different sprockets.

It should be noted that the utility model discloses on being applied to steamboat bicycle or climbing bicycle more, solve the derailleur bottom of steamboat bicycle and contact easily with ground and the insecure problem of structure of climbing bicycle, in addition, the utility model discloses still can be applied to other bicycle types, its stability can be good, and is not fragile.

The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the technical effects of the present invention should be all included in the protection scope of the present invention as long as the technical effects are achieved by any of the same or similar means.

Claims

1. A bicycle derailleur, includes four bar linkage assembly and opens the chain subassembly that articulates on four bar linkage assembly, its characterized in that, be equipped with the hinge seat on the four bar linkage assembly, it includes to open the chain subassembly:

the outer guide plate is fixedly arranged on the hinge seat and extends obliquely downwards;

the inner guide plate is fixedly connected to the side surface of the outer guide plate;

the rotating arm is rotatably connected between the outer guide plate and the inner guide plate, and a reset assembly is arranged at the rotating connection position of the rotating arm;

and the tensioning wheel is rotationally connected to the rotating arm.

2. The bicycle derailleur according to claim 1, wherein said four bar linkage assembly includes:

a base;

the hinge base;

the wire seat is hinged to the rear side of the bottom of the base;

the first end part of the outer hinge plate is hinged to the middle part of the base, and the second end part of the outer hinge plate is hinged to the upper end of the hinge seat;

and the first end part of the inner hinge plate is hinged to the bottom of the base and extends outwards to form a connecting plate fixedly connected with the wire seat, and the second end part of the inner hinge plate is hinged to the lower end of the hinge seat.

3. The bicycle derailleur according to claim 2, wherein the wire seat defines a guide slot and the base defines a shift wire slot located along an exit side of the guide slot.

4. The bicycle derailleur according to claim 1, wherein a first end of the pivot arm is pivotally coupled to a distal end of the inner and outer guide plates, and a second end of the pivot arm is provided with a guide wheel.

5. The bicycle derailleur according to claim 4, wherein the return assembly is a torsion spring, the first end of the pivot arm has a receiving cavity therein, a sidewall of the receiving cavity has a recess for receiving the first end of the torsion spring, and a connection between the inner guide and the pivot arm has an inner bore for receiving the second end of the torsion spring.

6. The bicycle derailleur according to claim 5, wherein distal ends of said inner and outer guide plates are coupled to the pivot arm by a screw.

7. The bicycle derailleur according to claim 4, wherein a side of the hinge base adjacent the guide wheel is provided with a stop extending along an outer edge.

8. The bicycle derailleur according to claim 4, wherein the pivot arm is provided with an outwardly curved bend near the first end thereof, the bend serving to offset the bottom of the outer guide plate during upward rotation of the pivot arm.

9. A bicycle comprising a frame and a bicycle derailleur according to any one of claims 1-8.