Stable chassis assembly of overhead working truck

Abstract

The utility model relates to the technical field of hydraulic aerial cage chassis, in particular to a stable chassis assembly of a hydraulic aerial cage, which comprises a chassis body, wheels are respectively mounted on two sides of the front end and the rear end of the chassis body, a chassis top frame is arranged above the chassis body, and alloy connecting rods are respectively arranged at four corners of the chassis body. The upper ends of the alloy connecting rods are movably hinged to the side walls, corresponding to the lateral openings, of the chassis body, buffering connecting assemblies are symmetrically installed on the inner side and the outer side of each chassis top frame correspondingly, and the two ends of each buffering connecting assembly are connected to the bottom of the chassis body correspondingly. And multi-angle side supporting mechanisms are respectively arranged at four corners of each chassis top frame. The whole chassis assembly can play a stable supporting role when the chassis assembly is matched with a high-altitude working truck to carry out high-altitude lifting operation, multi-point supporting is achieved through the cooperation of the four wheels arranged at the bottom and the multi-angle side supporting mechanism capable of stretching out and drawing back and inclining laterally during supporting, and the supporting stability of the bottom of the whole structure is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chassis of aerial work vehicles, in particular to a stable chassis assembly of an aerial work vehicle. Background Art

[0002] Aerial work vehicles are a type of mechanical equipment used for aerial work. They are widely used in construction, power maintenance, urban lighting, road maintenance and other fields to ensure the safety and efficiency of workers working at high altitudes. As an indispensable equipment in modern engineering construction, the reasonable selection and use of aerial work vehicles is of great significance to improving work efficiency and ensuring the safety of operators.

[0003] Since aerial work vehicles need to use lifting to lift the operators to the working height when working, the stability of their overall chassis plays an important role in the safety of the workers working on them. Therefore, the research and development and design of the chassis of work vehicles are also constantly innovating in the industry.

[0004] For example, in the patent document with patent publication number CN213011865U, a chassis of an aerial platform work vehicle is disclosed, whose main structure includes a chassis body, a cross beam, a vertical beam, a support foot, a telescopic rod, a support foot, wheels, a wear-resistant layer and other structural parts. It can be seen that the improvement lies in that telescopic rods are respectively installed at the four corners of the chassis body to achieve support to improve the stability of the entire structure.

[0005] However, this structure only relies on the support of the telescopic rod. When working under the influence of wind load, this chassis structure cannot increase the support range of the support point, and the stability enhancement effect on the entire chassis is not obvious, and the overall stability is still poor.

[0006] To this end, the utility model optimizes the existing aerial work vehicle chassis structure, and hereby proposes a stable chassis assembly for an aerial work vehicle to better solve the problems existing in the prior art. Utility Model Content

[0007] The utility model is to solve one of the above-mentioned technical problems, and the technical scheme adopted is: a stable chassis assembly of an aerial work vehicle, comprising a chassis body, wheels are respectively installed on both sides of the front end and the rear end of the chassis body, a chassis top frame is arranged above the chassis body, a slewing bearing is installed on the central top of the chassis top frame, lateral openings are respectively arranged at the front and rear ends of the chassis top frame, alloy connecting rods are respectively arranged at the four corners of the chassis body, the upper end of each of the alloy connecting rods is respectively movably hinged on the side wall at the position of the lateral opening corresponding to the chassis body, the lower end of each of the alloy connecting rods is respectively movably hinged to the corresponding end of the chassis top frame, buffer connection components are respectively symmetrically installed on the inner and outer sides of each of the chassis top frames, the two ends of each of the buffer connection components are respectively connected to the bottom of the chassis body, and multi-angle side support mechanisms are respectively installed at the four corners of each of the chassis top frames.

[0008] In any of the above schemes, it is preferred that the buffer connection assembly includes a first leaf spring and a second leaf spring respectively arranged at the front and rear parts of one side of the chassis top frame, and the two ends of the first leaf spring are respectively connected to the positioning seats fixedly connected to the bottom of the chassis top frame at corresponding positions, and the two ends of the second leaf spring are respectively connected to the positioning seats fixedly connected to the bottom of the chassis top frame at corresponding positions.

[0009] In any of the above schemes, preferably, a U-shaped clamp is fixed to the bottom of the middle section of each of the first leaf springs, and the U-shaped clamp is used to clamp the periphery of the wheel axle at a corresponding position.

[0010] In any of the above schemes, it is preferred that a plurality of first vertical springs are spaced apart above the first leaf spring, the top of each of the first vertical springs is fixed to the bottom of the chassis top frame, and the bottom of the first vertical springs is fixed to the top of the first leaf spring.

[0011] In any of the above schemes, it is preferred that a plurality of second vertical springs are spaced apart above the second leaf spring, the top of each of the second vertical springs is fixed to the bottom of the chassis top frame, and the bottom of the second vertical springs is fixed to the top of the second leaf spring.

[0012] In any of the above schemes, preferably, the multi-angle side support mechanism includes a side support cylinder hinged at the end side wall of the chassis top frame, a leveling foot seat is movably hinged at the bottom of the piston rod of the side support cylinder, the bottom of the leveling foot seat is used to support on the ground, a positioning ear seat is fixedly welded to the top of the chassis top frame on one side of the side support cylinder, a position control cylinder is arranged between the positioning ear seat and the side support cylinder, the lower end of the cylinder barrel of the position control cylinder is movably hinged on the positioning ear seat, the piston rod of the position control cylinder is movably hinged to the top of the cylinder barrel of the side support cylinder, and the position control cylinder drives the adjustment of the inclination angle of the side support cylinder through the extension and retraction of the piston rod.

[0013] In any of the above schemes, it is preferred that a two-way telescopic cylinder is fixedly installed in the middle of the inner wall and the middle of the outer wall of the chassis body, and an arc-shaped friction block is fixedly installed at the bottom of the piston rod on both sides of the two-way telescopic cylinder, and the arc-shaped surface of the arc-shaped friction block is used to abut against the outer wall of the wheel on the corresponding side.

[0014] In any of the above schemes, it is preferred that the two-way telescopic cylinder adopts a two-way telescopic hydraulic cylinder, and the two-way telescopic hydraulic cylinder is connected with a hydraulic station configured on the aerial work vehicle when working.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The stable chassis assembly of the aerial work vehicle as a whole can play a role of stable support when cooperating with the entire aerial work vehicle to perform high-altitude lifting operations. When providing support, it relies on the four wheels arranged at the bottom to cooperate with the multi-angle side support mechanism that can be telescopic and laterally tilted to achieve multi-point support, effectively improving the support stability of the bottom of the entire structure.

[0017] 2. When the designed multi-angle side support mechanism is supported on the ground, the corresponding side support cylinder is controlled to drive the corresponding leveling foot to support on the ground. The leveling foot can increase the contact area with the ground and enhance the stability of the ground connection. In addition, when controlling the swing of the side support cylinder, the corresponding position control cylinder is relied on to control its inclination angle, so as to achieve the effect of extending the support of the side support cylinder and control the position of the leveling foot at the bottom of the four side support cylinders to support the ground outside.

[0018] 3. The buffer connection components designed in the entire chassis assembly structure can effectively achieve buffering when encountering vibrations by relying on the support of the leaf spring and the corresponding vertical spring, ensuring the softness of the entire structure when it is bumpy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the specific implementation of the utility model, the following will briefly introduce the drawings required for the specific implementation. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, each element or component is not necessarily drawn according to the actual scale.

[0020] Figure 1 It is a structural schematic diagram of the multi-angle side support mechanism of the utility model in an idle state.

[0021] Figure 2 It is a structural schematic diagram of the multi-angle side support mechanism of the utility model in a vertical support state.

[0022] Figure 3 It is a structural schematic diagram of the multi-angle side support mechanism of the utility model in a side support positioning state.

[0023] Figure 4 It is a partial enlarged structural schematic diagram of the wheel part of the utility model.

[0024] Figure 5 It is a schematic diagram of the top structure of the chassis top frame of the utility model.

[0025] In the figure, 1, chassis body; 2, wheels; 3, chassis top frame; 4, slewing bearing; 5, alloy connecting rod; 6, first leaf spring; 7, second leaf spring; 8, positioning seat; 9, U-shaped clamp; 10, wheel axle; 11, first vertical spring; 12, second vertical spring; 13, side support cylinder; 14, leveling foot seat; 15, positioning ear seat; 16, control cylinder; 17, two-way telescopic cylinder; 18, arc-shaped friction block; 19, lateral opening. DETAILED DESCRIPTION

[0026] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the scope of protection of the utility model. The specific structure of the utility model is as follows Figure 1-Figure 5 as shown in .

[0027] Embodiment 1: A stable chassis assembly for an aerial work vehicle comprises a chassis body 1, wheels 2 are respectively installed on both sides of the front end and the rear end of the chassis body 1, a chassis top frame 3 is arranged above the chassis body 1, a slewing bearing 4 is installed at the central top of the chassis top frame 3, lateral openings 19 are respectively arranged at the front and rear ends of the chassis top frame 3, alloy connecting rods 5 are respectively arranged at the four corners of the chassis body 1, the upper end of each of the alloy connecting rods 5 is movably hinged on the side wall at the position of the lateral opening of the chassis body 1, and the lower end of each of the alloy connecting rods 5 is movably hinged to the corresponding end of the chassis top frame 3, buffer connection components are symmetrically installed on the inner and outer sides of each of the chassis top frames 3, the two ends of each of the buffer connection components are respectively connected to the bottom of the chassis body 1, and multi-angle side support mechanisms are respectively installed at the four corners of each of the chassis top frames 3. The stable chassis assembly of the aerial work vehicle in this design is supported on the ground by four wheels 2 as a whole. The slewing bearing 4 on the top is used to install the lifting structure, which can be driven to convert to the corresponding work station by the rotation of the slewing bearing 4. The chassis body 1 and the chassis top frame 3 are connected by various alloy connecting rods 5, and then rely on the buffer connection assembly for buffer connection. The overall coordination effectively improves the stability of the entire chassis structure. When it is necessary to connect to the ground for positioning, the extension of the multi-angle side support mechanism can drive the corresponding leveling foot 14 to support on the ground, and cooperate with the ground support of each wheel 2 to ensure the stability of multi-point support and reduce the probability of lateral tilt.

[0028] In any of the above schemes, it is preferred that the buffer connection assembly includes a first leaf spring 6 and a second leaf spring 7 respectively arranged at the front and rear parts of one side of the chassis top frame 3, and the two ends of the first leaf spring 6 are respectively connected to the positioning seat 8 fixedly connected to the bottom of the chassis top frame 3 at the corresponding position, and the two ends of the second leaf spring 7 are respectively connected to the positioning seat 8 fixedly connected to the bottom of the chassis top frame 3 at the corresponding position.

[0029] In any of the above schemes, preferably, a U-shaped clamp 9 is fixed to the bottom of the middle section of each of the first leaf springs 6, and the U-shaped clamp 9 is used to clamp the periphery of the axle 10 of the wheel 2 at the corresponding position.

[0030] The buffer connection assembly in the present design adopts the first leaf spring 6 and the second leaf spring 7 to play the role of main body support, and at the same time connects the chassis top frame 3 and the chassis body 1 together in the form of suspension. By relying on the limitation of the wheel axle 10 by the U-shaped clamp 9, the first leaf spring 6 and the second leaf spring 7 can withstand the load impact of the wheel 2 on the chassis top frame 3, maintain the stability of the vehicle's driving and adaptability to different road conditions, and effectively ensure the stability of its entire chassis structure.

[0031] In any of the above schemes, it is preferred that a plurality of first vertical springs 11 are spaced apart above the first leaf spring 6 , the top of each of the first vertical springs 11 is fixed to the bottom of the chassis top frame 3 , and the bottom of the first vertical spring 11 is fixed to the top of the first leaf spring 6 .

[0032] In any of the above schemes, it is preferred that a plurality of second vertical springs 12 are spaced apart above the second leaf spring 7 , the top of each of the second vertical springs 12 is fixed to the bottom of the chassis top frame 3 , and the bottom of the second vertical springs 12 is fixed to the top of the second leaf spring 7 .

[0033] The corresponding first leaf spring 6 and the second leaf spring 7 are both provided with corresponding first vertical springs 11 and second vertical springs 12 to further enhance the supporting effect of the entire leaf spring, thereby effectively improving the stability of the entire chassis structure and its adaptability to different road conditions.

[0034] Embodiment 2: Compared with Embodiment 1, this embodiment is different in that it also includes the following technical features:

[0035] In any of the above schemes, it is preferred that the multi-angle side support mechanism includes a side support cylinder 13 hinged at the end side wall of the chassis top frame 3, a leveling foot seat 14 is movably hinged at the bottom of the piston rod of the side support cylinder 13, the bottom of the leveling foot seat 14 is used to support on the ground, a positioning ear seat 15 is fixedly welded to the top of the chassis top frame 3 on one side of the side support cylinder 13, a control cylinder 16 is arranged between the positioning ear seat 15 and the side support cylinder 13, the lower end of the cylinder barrel of the control cylinder 16 is movably hinged on the positioning ear seat 15, the piston rod of the control cylinder 16 is movably hinged to the top of the cylinder barrel of the side support cylinder 13, and the control cylinder 16 drives the adjustment of the inclination angle of the side support cylinder 13 through the extension and retraction of the piston rod.

[0036] The multi-angle side support mechanism mainly relies on the position control cylinder 16, the side support cylinder 13 and the chassis top frame 3 to form a stable triangular support structure when working. When the position control cylinder 16 is extended or retracted, it can drive the corresponding side support cylinder 13 to swing, so that the swing angle of the side support cylinder 13 can be adjusted. When the side support cylinder 13 needs to be connected to the ground, the extension and retraction of the side support cylinder 13 is controlled to drive the leveling foot 14 hinged at its end to support it on the ground. The set leveling foot 14 can ensure the stability of the entire support structure when it is connected to the ground.

[0037] In any of the above schemes, it is preferred that a two-way telescopic cylinder 17 is fixedly installed in the middle of the inner wall and the middle of the outer wall of the chassis body 1, and an arc-shaped friction block 18 is fixedly installed at the bottom of the piston rod on both sides of the two-way telescopic cylinder 17, and the arc-shaped surface of the arc-shaped friction block 18 is used to abut against the outer wall of the wheel 2 on the corresponding side.

[0038] The expansion and contraction of the piston rod of the bidirectional telescopic cylinder 17 can drive the corresponding arc-shaped friction block 18 to brake the wheel 2, effectively ensuring the smooth braking performance of the wheel 2 during the entire lifting operation of the aerial work vehicle; in addition, the wheel 2 itself is also equipped with a braking structure to achieve the purpose of double braking coordination.

[0039] In any of the above schemes, it is preferred that the two-way telescopic cylinder 17 adopts a two-way telescopic hydraulic cylinder, and the two-way telescopic hydraulic cylinder is connected with the hydraulic station configured on the aerial work vehicle when working.

[0040] Specific working principle: The chassis assembly is supported on the ground by four wheels 2. The slewing bearing 4 on the top is used to install the lifting structure, which can be driven to the corresponding work position by the rotation of the slewing bearing 4. The chassis body 1 and the chassis top frame 3 are connected by various alloy connecting rods 5, and then rely on the buffer connection assembly for buffer connection. The overall coordination effectively improves the stability of the entire chassis structure.

[0041] When ground positioning is required, the extension of the multi-angle side support mechanism can drive the corresponding leveling foot 14 to support on the ground, and cooperate with the ground support of each wheel 2 to ensure the stability of multi-point support and reduce the probability of lateral tilt.

[0042] Specifically, when side support is performed to increase stability, the position control cylinder 16, the side support cylinder 13 and the chassis top frame 3 are mainly relied on to form a stable triangular support structure. When the position control cylinder 16 is extended or retracted, the corresponding side support cylinder 13 can be driven to swing, thereby adjusting the swing angle of the side support cylinder 13.

[0043] When the side support cylinder 13 needs to be connected to the ground, the extension and contraction of the side support cylinder 13 is controlled to drive the leveling foot 14 hinged at its end to support on the ground. The set leveling foot 14 can ensure the stability of the entire support structure when connected to the ground.

[0044] The stable chassis assembly of the aerial work vehicle as a whole can play a role of stable support when cooperating with the entire aerial work vehicle to perform high-altitude lifting operations. When providing support, it relies on the four wheels 2 arranged at the bottom to cooperate with the multi-angle side support mechanism that can be telescopic and laterally tilted to achieve multi-point support, effectively improving the support stability of the bottom of the entire structure.

[0045] When supported on the ground by the designed multi-angle side support mechanism, the corresponding side support cylinder 13 is controlled to extend and retract to drive the corresponding leveling foot 14 to support on the ground. The leveling foot 14 can increase the contact area with the ground and enhance the stability of the ground connection; in addition, when controlling the swing of the side support cylinder 13, the corresponding position control cylinder 16 is used to control its inclination angle, so as to achieve the effect of extending the support of the side support cylinder 13 and control the position of the leveling foot 14 at the bottom of the four side support cylinders 13 to support the ground outside; the buffer connection component designed in the entire chassis assembly structure can rely on the support of the leaf spring and the corresponding vertical spring to effectively achieve effective buffering when encountering vibration, thereby ensuring the softness of the entire structure when it is bumpy.

[0046] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model. For technicians in this technical field, any replacement improvements or changes made to the implementation methods of the utility model fall within the protection scope of the utility model.

[0047] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A stable chassis assembly for an aerial work vehicle, comprising a chassis body, with wheels mounted on both sides of the front and rear ends of the chassis body, characterized in that: A chassis top frame is arranged above the chassis body, a slewing bearing is installed on the central top of the chassis top frame, lateral openings are respectively arranged at the front and rear ends of the chassis top frame, alloy connecting rods are respectively arranged at the four corners of the chassis body, the upper end of each alloy connecting rod is movably hinged on the side wall at the position of the lateral opening corresponding to the chassis body, the lower end of each alloy connecting rod is movably hinged to the corresponding end of the chassis top frame, buffer connection components are symmetrically installed on the inner and outer sides of each chassis top frame, the two ends of each buffer connection component are respectively connected to the bottom of the chassis body, and multi-angle side support mechanisms are respectively installed at the four corners of each chassis top frame.

2. The stable chassis assembly of an aerial work vehicle according to claim 1, characterized in that: The buffer connection assembly includes a first leaf spring and a second leaf spring respectively arranged at the front and rear of one side of the chassis top frame, the two ends of the first leaf spring are respectively connected to the positioning seats fixedly connected to the bottom of the chassis top frame at corresponding positions, and the two ends of the second leaf spring are respectively connected to the positioning seats fixedly connected to the bottom of the chassis top frame at corresponding positions.

3. The stable chassis assembly of an aerial work vehicle according to claim 2, characterized in that: A U-shaped clamp is fixed to the bottom of the middle section of each of the first leaf springs, and the U-shaped clamp is used to clamp the periphery of the wheel axle at the corresponding position.

4. The stable chassis assembly of an aerial work vehicle according to claim 3, characterized in that: A plurality of first vertical springs are arranged at intervals above the first leaf springs, the top of each of the first vertical springs is fixed to the bottom of the chassis top frame, and the bottom of each of the first vertical springs is fixed to the top of the first leaf spring.

5. The stable chassis assembly of an aerial work vehicle according to claim 4, characterized in that: A plurality of second vertical springs are spaced apart above the second leaf springs, the top of each of the second vertical springs is fixed to the bottom of the chassis top frame, and the bottom of each of the second vertical springs is fixed to the top of the second leaf spring.

6. The stable chassis assembly of an aerial work vehicle according to claim 5, characterized in that: The multi-angle side support mechanism includes a side support cylinder hinged at the end side wall of the chassis top frame, a leveling foot seat is movably hinged at the bottom of the piston rod of the side support cylinder, the bottom of the leveling foot seat is used to support on the ground, a positioning ear seat is fixedly welded to the top of the chassis top frame on one side of the side support cylinder, a position control cylinder is arranged between the positioning ear seat and the side support cylinder, the lower end of the cylinder barrel of the position control cylinder is movably hinged on the positioning ear seat, the piston rod of the position control cylinder is movably hinged to the top of the cylinder barrel of the side support cylinder, and the position control cylinder drives the adjustment of the inclination angle of the side support cylinder through the extension and retraction of the piston rod.

7. The stable chassis assembly of an aerial work vehicle according to claim 6, characterized in that: A two-way telescopic cylinder is fixedly installed in the middle of the inner wall and the middle of the outer wall of the chassis body, and an arc-shaped friction block is fixedly installed at the bottom of the piston rod on both sides of the two-way telescopic cylinder, and the arc-shaped surface of the arc-shaped friction block is used to abut against the outer wall of the wheel on the corresponding side.

8. The stable chassis assembly of an aerial work vehicle according to claim 7, characterized in that: The bidirectional telescopic cylinder adopts a bidirectional telescopic hydraulic cylinder, and the bidirectional telescopic hydraulic cylinder is connected with the hydraulic station configured on the aerial work vehicle when working.

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