CN221214234U - Chassis mechanism of self-propelled aerial working platform expansion bridge - Google Patents

Abstract

The utility model provides a chassis mechanism of an expansion bridge of a self-propelled aerial working platform, which is characterized in that a steering connecting rod is additionally arranged between a steering oil cylinder and a wheel frame, when a wheel steers, a pin shaft at the hinge position of a first connecting rod and a second connecting rod is pushed to do arc motion along the hinge position of the first connecting rod and the expansion bridge by extending and retracting the steering oil cylinder, so that the available space in the middle of the wheel frame is increased, a driving device occupying larger space can be adapted, and meanwhile, the phenomenon that the vehicle collides with the driving device in the steering process can be avoided, and the safe and stable operation of the vehicle is ensured.

Description

Chassis mechanism of self-propelled aerial working platform expansion bridge

Technical Field

The invention relates to a chassis mechanism for self-propelled aerial work, in particular to a chassis mechanism for a self-propelled aerial work platform expansion bridge, and belongs to the technical field of aerial work vehicles.

Background

The tire type chassis of the self-walking aerial work platform bears the mass of the whole vehicle and drives the whole vehicle to walk, when the whole vehicle walks, the width of the tire type chassis is limited in consideration of the trafficability problem, and when the whole vehicle works at high altitude, the stability of the whole vehicle is considered, and the whole width of the tire type chassis needs to be increased to improve the stability of the whole vehicle support. In order to take the two conditions into consideration, the current common mode is to add a bridge expansion function to the tire chassis, namely, the tire chassis is in a narrower state to ensure the passing performance during running, and is in a wider state after the tire chassis passes through the bridge expansion during high-altitude operation to improve the supporting stability.

The technical scheme of the prior China published application CN115257233A is that the chassis and the aerial work platform capable of in-situ bridge expansion are disclosed, the half-bridge structure also comprises a mounting bracket arranged at the swinging end of the supporting swing arm, and the wheel assembly is rotationally connected to the mounting bracket through the wheel frame; the second pushing device comprises a left pushing rod and a right pushing rod which respectively act on the wheel assemblies on the same side, one end of the second pushing rod is rotatably installed on the installing support, the other end of the second pushing rod is rotatably connected with the wheel frame, and the second pushing rod pushes the wheel assemblies to rotate through expansion and contraction. The second push rod of this application is when promoting the wheel subassembly, realizes the wheel and turns to through directly promoting the wheel carrier, and the hydraulic motor in the wheel subassembly can be close to the extension end of second push rod when turning to this moment, and the safe working range of second push rod reduces, easily bumps with other structures.

Because the development speed of new energy appliances is very fast in recent years, the driving device is gradually replaced by the driving motor, but the driving motor structure is larger, and the technical scheme disclosed in the application cannot adapt to the driving device with a larger structure, so that the problem that how to arrange the structure of the chassis to ensure the installation space of the driving device when the driving device with a larger structure is installed is solved, and the safety operation of the push rod and the driving motor is not influenced when the wheels turn is solved.

Disclosure of Invention

The invention aims to: aiming at the defects existing in the prior art, the chassis mechanism of the expansion bridge of the self-propelled aerial working platform is provided, the steering connecting rod is additionally arranged between the steering oil cylinder and the wheel frame, when the wheels steer, the pin shafts at the hinged positions of the first connecting rod and the second connecting rod are pushed to do arc motion along the hinged positions of the first connecting rod and the expansion bridge by extending and retracting the steering oil cylinder, so that the available space in the middle of the wheel frame is increased, a driving device occupying larger space can be adapted, collision with the driving device in the steering process can be avoided, and safe and stable operation of the vehicle is ensured.

The technical scheme is as follows: the chassis mechanism of the expansion bridge of the self-propelled aerial working platform comprises a frame main body and front and rear groups of expansion bridge assemblies connected with the frame main body, each group of expansion bridge assemblies comprises two expansion bridge monomers which are bilaterally symmetrical, one end of each expansion bridge monomer is hinged to the frame main body, the expansion bridge monomers swing in the horizontal direction relative to the frame main body, the other end of each expansion bridge monomer is hinged to a wheel frame provided with wheels, an expansion bridge oil cylinder used for pushing the expansion bridge monomers to expand outwards or retract inwards is arranged between the frame main body and the expansion bridge monomers, a steering oil cylinder is hinged between each expansion bridge monomer and the wheel frame, a steering connecting rod is hinged between each steering oil cylinder and the corresponding wheel frame, each steering connecting rod comprises a first connecting rod and a second connecting rod which are hinged to each other, the other end of each first connecting rod is hinged to the corresponding expansion bridge monomer, the other end of each steering oil cylinder is far away from the corresponding expansion bridge monomer, and one end of each steering oil cylinder is hinged to the first connecting rod and the second connecting rod to the corresponding wheel frame through a pin shaft.

According to the utility model, the steering connecting rod is additionally arranged between the steering oil cylinder and the wheel frame, when the wheels steer, the pin shafts at the hinged positions of the first connecting rod and the second connecting rod are pushed to do arc motion along the hinged positions of the first connecting rod and the expansion bridge monomer, so that the second connecting rod is driven to push forward or pull the wheel frame to steer the real wheels, and meanwhile, the second connecting rod is hinged with the wheel frame, so that the position degree of the second connecting rod is gradually far away from the middle part of the wheel frame in the forward pushing process, the available space in the middle part of the wheel frame is increased, a driving device with larger occupied space can be adapted, no collision with the driving device can be realized in the steering process, and the safe and stable operation of the vehicle is ensured.

In order to enlarge the available installation space in the middle of the wheel frame, the first connecting rod and the second connecting rod are both arc-shaped connecting rods.

The connecting rod is arranged to be an arc-shaped connecting rod, so that the distance between the second connecting rod and the middle part of the wheel frame during the action can be further enlarged in the process of pushing the wheels to turn, and the running reliability of the vehicle is improved.

In order to make the connecting rod atress even, first connecting rod and second connecting rod all set up to upper and lower two-layer, steering cylinder connects on the round pin axle between two-layer connecting rod structure.

The extending shaft of the steering oil cylinder is connected to the pin shaft between the upper layer connecting rod and the lower layer connecting rod, so that the stress of the steering connecting rod is uniform, the smoothness of steering of wheels is enhanced, and the time required by expansion is shortened.

In order to improve the expansion efficiency of the expansion bridge, the expansion bridge oil cylinders are divided into a front group and a rear group, each group of expansion bridge oil cylinders comprises two expansion bridge oil cylinder monomers which are bilaterally symmetrical, one end of each group of expansion bridge oil cylinders is hinged to the middle of the frame main body, and the other end of each group of expansion bridge oil cylinders is hinged to the middle of each expansion bridge monomer.

Through the installation extension bridge hydro-cylinder of from inside to outside direction to extension bridge hydro-cylinder and the free pin joint of extension bridge set up in the free middle part of extension bridge, make the extension bridge monomer when expanding, be the outside extension of extension bridge monomer atress, make the promotion structure more simple effective, increase equipment reliability, promote expansion efficiency.

In order to make the expansion bridge expand more laborsaving and quick, the expansion bridge monomer sets up to V type expansion bridge monomer, expansion bridge hydro-cylinder articulates in the expansion bridge monomer of V type and is close to frame main part one side.

The hinge point of the expansion bridge cylinder and the expansion bridge monomer is arranged on one side close to the frame main body, so that labor is saved when the expansion bridge monomer is pushed to expand outwards, the stress direction of the expansion bridge monomer is deviated to the vertical direction of the left side and the right side of the vehicle, and the expansion bridge cylinder can save labor more rapidly when the expansion bridge monomer is pushed to expand, and the expansion speed of the expansion bridge monomer is further improved.

In order to enable the steering cylinder to provide a better steering effect, the steering cylinder is hinged with the V-shaped expansion bridge monomer on the inner side surface of the inward bending part of the expansion bridge monomer.

The hinge point of the steering oil cylinder and the expansion bridge monomer is set at the bending position of the expansion bridge monomer, so that the extending and retracting distance of the steering oil cylinder is increased, and wheels can rotate at a larger angle under the pulling of the steering oil cylinder.

In order to further increase the steering angle of the wheels, a movable cavity is formed in one end, hinged to the wheel frame, of the extension bridge unit, and the first connecting rod is hinged to the extension bridge unit through a pin shaft in the movable cavity.

The hinge point of the first connecting rod and the expansion bridge monomer in the movable cavity is a point position for increasing the steering angle of the tire, so that the hinge point of the first connecting rod is positioned in the movable cavity in the expansion bridge monomer, and the four-bar structure formed by the hinge point of the expansion bridge monomer and the wheel frame, the hinge point of the first connecting rod and the wheel frame, the hinge point of the second connecting rod and the first connecting rod and the hinge point of the first connecting rod and the movable cavity has larger steering capacity.

In order to monitor the steering angle of the expansion bridge in real time, an angle sensor is arranged on a pin shaft at the hinge joint of the expansion bridge monomer and the frame main body.

And a driving motor with an output end in power connection with the wheels is arranged in the wheel frame.

The beneficial effects are that: according to the utility model, the steering connecting rod is additionally arranged between the steering oil cylinder and the wheel frame, when the wheels steer, the pin shafts at the hinged positions of the first connecting rod and the second connecting rod are pushed to do arc motion along the hinged positions of the first connecting rod and the expansion bridge through the extension and retraction of the steering oil cylinder, so that the available space in the middle of the wheel frame is increased, a driving device occupying larger space can be adapted, no collision with the driving device in the steering process can be realized, and the safe and stable operation of the vehicle is ensured.

The hinge point of the first connecting rod and the expansion bridge in the movable cavity is a point position for increasing the steering angle of the tire, so that the hinge point of the first connecting rod is located in the movable cavity in the expansion bridge, and the four-bar structure formed by the hinge point of the expansion bridge and the wheel frame, the hinge point of the first connecting rod and the wheel frame, the hinge point of the second connecting rod and the first connecting rod and the hinge point of the first connecting rod and the movable cavity has larger steering capacity.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is an overall construction diagram of the present utility model.

Fig. 2 is a partial construction diagram of the connection of the expansion bridge and the wheel of the present utility model.

FIG. 3 is an unexpanded state diagram of the present utility model.

Fig. 4 is a state diagram of the large angle steering of the wheel according to the present utility model.

Fig. 5 is a state diagram of the wheel steering after the expansion of the expansion bridge according to the present utility model.

Fig. 6 is an expanded wheel non-steering state diagram of the expansion bridge of the present utility model.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1 and 2, the chassis mechanism of the expansion bridge of the self-propelled aerial working platform comprises a frame main body 1 and front and rear groups of expansion bridge assemblies connected with the frame main body 1, each group of expansion bridge assemblies comprises two expansion bridge monomers 2 which are bilaterally symmetrical, one end of each expansion bridge monomer 2 is hinged on the frame main body 1, the expansion bridge monomers 2 swing in the horizontal direction relative to the frame main body 1, the other end of each expansion bridge monomer 2 is hinged with a wheel frame 31 provided with wheels 3, an expansion bridge cylinder 4 for pushing the expansion bridge monomers 2 to expand outwards or retract inwards is arranged between the frame main body 1 and the expansion bridge monomers 2, a steering cylinder 5 is hinged between each expansion bridge monomer 2 and the wheel frame 31, a steering connecting rod 6 is hinged between each steering cylinder 5 and each wheel frame 31, each steering connecting rod 6 comprises a first connecting rod 61 and a second connecting rod 62 which are hinged with each other, the other end of each first connecting rod 61 is hinged with each expansion bridge monomer 2, the other end of each steering cylinder 5 is hinged with each second connecting rod 62, and one end of each steering cylinder 5 is far away from the expansion bridge monomers 2 are hinged with each wheel frame 31, and each steering connecting rod 62 is hinged with each other pin shaft.

According to the utility model, the steering connecting rod 6 is additionally arranged between the steering oil cylinder 5 and the wheel frame 31, when the wheels steer, the pin shaft at the hinge joint of the first connecting rod 61 and the second connecting rod 62 is pushed to do arc motion along the hinge joint of the first connecting rod 61 and the expansion bridge monomer 2 through the extension and retraction of the steering oil cylinder 5, the second connecting rod 62 is driven to push or pull the wheel frame 31 forwards or backwards to steer the wheels, meanwhile, the second connecting rod 62 is hinged with the wheel frame 31, so that the position degree of the second connecting rod 62 is gradually far away from the middle part of the wheel frame 31 in the forward pushing process, the available space in the middle part of the wheel frame 31 is increased, a driving device with larger occupied space volume can be adapted, and meanwhile, the safe and stable operation of the vehicle can be ensured without collision with the driving device in the steering process.

As shown in fig. 2 to 6, in order to expand the installation space available in the middle of the wheel carrier, the first link 61 and the second link 62 are each provided as arc-shaped links.

The connecting rod is an arc-shaped connecting rod, so that the distance between the second connecting rod 62 and the middle part of the wheel frame 31 during the action of pushing the wheels to turn can be further enlarged, and the running reliability of the vehicle can be improved.

As shown in fig. 2, in order to make the stress of the connecting rods uniform, the first connecting rod 61 and the second connecting rod 62 are arranged in an upper layer and a lower layer, and the steering cylinder 5 is connected to a pin shaft between the two layers of connecting rod structures.

The extending shaft of the steering oil cylinder 5 is connected to the pin shaft between the upper layer connecting rod and the lower layer connecting rod, so that the stress of the steering connecting rod 6 is uniform, the smoothness of steering of wheels is enhanced, and the time required for expansion is shortened.

As shown in fig. 3 to 6, in order to improve the expansion efficiency of the expansion bridge, the expansion bridge cylinders 4 are divided into front and rear groups, each group of expansion bridge cylinders 4 comprises two expansion bridge cylinder 4 monomers which are symmetrical left and right, one end of each group of expansion bridge cylinders 4 is hinged to the middle part of the frame main body 1, and the other end of each group of expansion bridge cylinders 4 is hinged to the middle part of the expansion bridge monomer 2.

Through the installation extension bridge hydro-cylinder 4 of from inside to outside direction to extension bridge hydro-cylinder 4 sets up in the middle part of extension bridge monomer 2 with the pin joint of extension bridge monomer 2, makes extension bridge monomer 2 when the extension, is the outside extension of extension bridge monomer 2 atress, makes the promotion structure more simple effective, increases equipment reliability, promotes expansion efficiency.

In order to make the expansion bridge expand more laborsaving and quick, expansion bridge monomer 2 sets up to V type expansion bridge monomer 2, expansion bridge hydro-cylinder 4 articulates in the expansion bridge monomer 2 of V type and is close to frame main part 1 one side.

The hinge point of the expansion bridge cylinder 4 and the expansion bridge single body 2 is arranged on one side close to the frame main body 1, when the expansion bridge single body 2 is pushed to expand outwards, the force is more saved, the force bearing direction of the expansion bridge single body 2 is more deflected to the vertical direction on the left side and the right side of the vehicle, so that the expansion bridge cylinder 4 can be more quickly and labor-saving when the expansion bridge single body 2 is pushed to expand, and the expansion speed of the expansion bridge single body 2 is further improved.

In order to enable the steering cylinder to provide a better steering effect, the steering cylinder 5 is hinged with the V-shaped expansion bridge unit 2 on the inner side surface of the inward bending part of the expansion bridge unit 2.

As shown in fig. 2 to 6, by setting the hinge point of the steering cylinder 5 and the extension bridge unit 2 at the bending position of the extension bridge unit 2, the extending and retracting distance of the steering cylinder 5 is increased, so that the wheels 3 can rotate by a larger angle under the pulling of the steering cylinder 5.

In order to further increase the steering angle of the wheel, a movable cavity 21 is formed at one end of the expansion bridge unit 2 hinged with the wheel frame 31, and the first connecting rod 61 is hinged with the expansion bridge unit 2 in the movable cavity 21 through a pin shaft.

The hinge point of the first connecting rod 61 and the expansion bridge monomer 2 in the movable cavity 21 is a point position for increasing the steering angle of the tire, so that the hinge point of the first connecting rod 61 is positioned in the movable cavity 21 in the expansion bridge monomer 2, and a four-bar structure consisting of the hinge point of the expansion bridge monomer 2 and the wheel frame 31, the hinge point of the first connecting rod 61 and the wheel frame 31, the hinge point of the second connecting rod 62 and the first connecting rod 61 and the hinge point of the first connecting rod 61 and the movable cavity 21 has larger steering capability.

As shown in fig. 1, in order to monitor the steering angle of the expansion bridge in real time, an angle sensor 11 is installed on a pin shaft at the hinge joint of the expansion bridge unit 2 and the frame main body 1.

As shown in fig. 1 and 3, a driving motor 32 having an output end connected with the power of the wheel 3 is disposed in the wheel frame 31.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. Chassis mechanism of self-propelled aerial working platform extension bridge, including frame main part (1) and two sets of extension bridge assemblies of being connected with frame main part (1) around, every extension bridge assembly of group includes two bilateral symmetry's extension bridge monomer (2), extension bridge monomer (2) one end articulates on frame main part (1), makes extension bridge monomer (2) swing in the horizontal direction for frame main part (1), and the other end articulates with wheel frame (31) of installing wheel (3), be provided with between frame main part (1) and extension bridge monomer (2) and be used for promoting extension bridge monomer (2) outside extension or to inside extension bridge hydro-cylinder (4) of retrieving, articulated install steering cylinder (5) between extension bridge monomer (2) and wheel frame (31), its characterized in that: steering link (6) are installed to articulated between steering cylinder (5) and wheel frame (31), steering link (6) are including articulated first connecting rod (61) and second connecting rod (62) each other, first connecting rod (61) other end is articulated with extension bridge monomer (2), the second connecting rod (62) other end is articulated with wheel frame (31), steering cylinder (5) keep away from extension bridge monomer (2) one end respectively with first connecting rod (61) and second connecting rod (62) articulated at same round pin epaxially.

2. The chassis mechanism of a self-propelled aerial work platform extension bridge of claim 1, wherein: the first connecting rod (61) and the second connecting rod (62) are both arc-shaped connecting rods.

3. The chassis mechanism of a self-propelled aerial work platform extension bridge of claim 2, wherein: the first connecting rod (61) and the second connecting rod (62) are arranged in an upper layer and a lower layer, and the steering oil cylinder (5) is connected to a pin shaft between the two layers of connecting rod structures.

4. The chassis mechanism of a self-propelled aerial work platform extension bridge of claim 1, wherein: the expansion bridge oil cylinders (4) are divided into a front group and a rear group, each group of expansion bridge oil cylinders (4) comprises two expansion bridge oil cylinders (4) in bilateral symmetry, one end of each expansion bridge oil cylinder (4) is hinged to the middle of the frame main body (1), and the other end of each expansion bridge oil cylinder is hinged to the middle of the expansion bridge single body (2).

5. The chassis mechanism of a self-propelled aerial work platform extension bridge of claim 4, wherein: the expansion bridge unit (2) is arranged as a V-shaped expansion bridge unit (2), and the expansion bridge cylinder (4) is hinged to one side, close to the frame main body (1), of the V-shaped expansion bridge unit (2).

6. The chassis mechanism of a self-propelled aerial work platform extension bridge of claim 5, wherein: the steering cylinder (5) is hinged with the V-shaped expansion bridge unit (2) on the inner side surface of the inward bending part of the expansion bridge unit (2).

7. The chassis mechanism of a self-propelled aerial work platform extension bridge of claim 1, wherein: the expansion bridge unit (2) is hinged with the wheel frame (31), one end of the expansion bridge unit is provided with a movable cavity (21), and the first connecting rod (61) is hinged with the expansion bridge unit (2) in the movable cavity (21) through a pin shaft.

8. The chassis mechanism of a self-propelled aerial work platform extension bridge of claim 1, wherein: an angle sensor (11) is arranged on a pin shaft at the hinge joint of the expansion bridge monomer (2) and the frame main body (1).

9. The chassis mechanism of a self-propelled aerial work platform extension bridge of claim 1, wherein: a driving motor (32) with an output end in power connection with the wheels (3) is arranged in the wheel frame (31).