A crawler chassis structure with variable width for aerial work vehicles

Abstract

The present invention discloses a crawler chassis structure with variable width for aerial work vehicles, including a fixed chassis, two movable chassis and a crawler assembly, wherein a fixed block is fixedly provided on the outer wall of the fixed chassis, a transmission cavity is provided in the fixed block, a first transmission shaft is provided in the transmission cavity through a first motor, a plurality of screws extending to the outer wall of the fixed block are also provided in the transmission cavity, and the plurality of screws are connected to the first transmission shaft through a first rotating mechanism, and the outer walls of the plurality of screws are threadedly connected with connecting rods, and the plurality of connecting rods are matched with the fixed block through a limiting mechanism. The present invention can realize the rotation of the screw by means of the above components by setting a fixed chassis, a movable chassis, a screw and a connecting rod, and realize the movement of the connecting rod relative to the fixed block by means of the rotation of the screw, thereby realizing the spacing adjustment of the crawler assemblies on both sides, and ensuring that the work vehicle can adapt to different road environments and move smoothly.

Description

Technical Field

[0001] The invention relates to the technical field of aerial work vehicles, and in particular to a crawler chassis structure with variable width for an aerial work vehicle. Background Art

[0002] An aerial work vehicle is a vehicle that is over three meters high and has multiple hydraulic cylinders controlled by a hydraulic or electric system. It can lift up and down to perform operations. It is a manned aerial work vehicle that uses hydraulic transmission and is a contemporary advanced species of mechanical equipment.

[0003] A crawler aerial work vehicle is one type of aerial work vehicle. In the prior art, since the aerial work vehicle needs to be placed and used in a variety of usage scenarios and needs to move from an initial location to a destination, if a narrow road surface is encountered during movement, the spacing between the track assemblies on both sides is constant due to the fixed chassis. At this time, the work vehicle will not be able to pass through the road surface normally. If there is a groove in the middle of the road surface, and the spacing between the raised road surfaces is smaller than the spacing between the tracks on both sides of the work vehicle, the work vehicle will also not be able to pass through easily and smoothly. During actual operation, the spacing between the tracks on both sides often needs to be adjusted according to the specific usage environment. The chassis structure of common crawler aerial work vehicles is fixed and does not have the ability to be flexibly adjusted. Therefore, it is necessary to design a crawler chassis structure with a variable width for an aerial work vehicle to address the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a crawler chassis structure with variable width for an aerial work vehicle.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A crawler chassis structure with variable width for an aerial work vehicle comprises a fixed chassis, two movable chassis and a crawler assembly, wherein a fixed block is fixedly arranged on the outer wall of the fixed chassis, a transmission cavity is arranged in the fixed block, a first transmission shaft is arranged in the transmission cavity through a first motor, a plurality of screws extending to the outer wall of the fixed block are also rotatably arranged in the transmission cavity, a plurality of the screws are connected to the first transmission shaft through a first rotating mechanism, a plurality of the outer walls of the screws are threadedly connected to connecting rods, a plurality of the connecting rods are matched with the fixed block through a limiting mechanism, a plurality of the connecting rods are connected to the two fixing blocks through an installation mechanism The movable chassis are connected, a through movable channel is provided on the fixed chassis, a groove is provided at one end of the two movable chassis, the two movable chassis are in the movable channel and are connected with the fixed chassis through a connecting mechanism, an output shaft that cooperates with the track assembly is rotatably provided on the two movable chassis, two fixed shafts are provided in the movable channel through a stabilizing mechanism, a second transmission shaft is also rotatably provided in the movable channel through a second motor, the two fixed shafts are connected with the second transmission shaft through a second transmission mechanism, and the two fixed shafts are connected with the output shaft through a clamping mechanism.

[0007] Preferably, the first rotating mechanism comprises a first driving gear fixedly arranged on the outer wall of the first transmission shaft, and the end of the screw rod is fixedly provided with a first transmission gear meshing with the first driving gear.

[0008] Preferably, the limiting mechanism comprises a limiting rod fixedly connected to the outer wall of the fixing block, and the outer wall of the connecting rod is provided with a limiting hole corresponding to the limiting rod.

[0009] Preferably, the mounting mechanism comprises a mounting block fixedly connected to the end of the connecting rod, and the mounting block is connected to the outer wall of the movable chassis through a plurality of mounting bolts.

[0010] Preferably, the connection mechanism comprises a connection block arranged on the inner wall of the movable channel on the fixed chassis, and the outer wall of the movable chassis is provided with a connection groove corresponding to the connection block.

[0011] Preferably, the stabilizing mechanism comprises a stabilizing ring rotatably sleeved on the outside of the fixed shaft, and the stabilizing ring is stably arranged in the movable channel through two stabilizing rods on the outer wall of the stabilizing ring.

[0012] Preferably, the second transmission mechanism comprises a second driving gear fixedly arranged on the outer wall of the second transmission shaft, and the end of the fixed shaft is fixedly provided with a second transmission gear meshing with the second driving gear.

[0013] Preferably, the clamping mechanism comprises a plurality of clamping strips arranged on the outer wall of the fixed shaft, the output shaft is provided with a connecting groove corresponding to the fixed shaft, and the inner wall of the connecting groove is provided with a plurality of clamping grooves corresponding to the clamping strips.

[0014] Beneficial effects of the present invention:

[0015] 1. By setting a fixed chassis, a movable chassis, a screw and a connecting rod, etc., the screw can be rotated with the help of the above components, and the connecting rod can move relative to the fixed block with the help of the screw rotation, thereby realizing the adjustment of the spacing of the crawler assemblies on both sides, ensuring that the work vehicle can adapt to different road environments and move smoothly.

[0016] 2. By setting the output shaft, fixed shaft, clamping mechanism and stabilizing mechanism, when the output shaft moves relative to the fixed shaft and drives the track assembly to adjust the spacing, the clamping strip 24 and the clamping groove can still ensure that the output shaft has power output.

[0017] 3. By providing the connection blocks and the connection grooves, when the movable chassis moves relative to the fixed chassis, the stability of the movable chassis during movement can be achieved with the aid of the above components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a crawler chassis structure with variable width for an aerial work vehicle proposed by the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure viewed from above;

[0020] Figure 3 It is a schematic diagram of the internal component structure of the fixed block;

[0021] Figure 4 It is a schematic diagram of the internal component structure of the fixed base and the movable base;

[0022] Figure 5 for Figure 4 A schematic diagram of the enlarged structure.

[0023] In the figure: 1 fixed chassis, 2 movable chassis, 3 track assembly, 4 fixed block, 5 connecting rod, 6 mounting block, 7 transmission chamber, 8 first transmission shaft, 9 first driving gear, 10 first transmission gear, 11 screw, 12 limit rod, 13 movable channel, 14 groove, 15 connecting block, 16 connecting groove, 17 output shaft, 18 second transmission shaft, 19 second driving gear, 20 fixed shaft, 21 second transmission gear, 22 stabilizing ring, 23 stabilizing rod, 24 clamping strip. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Reference Figure 1-5A crawler chassis structure with variable width for an aerial work vehicle comprises a fixed chassis 1, two movable chassis 2 and a crawler assembly 3. A fixed block 4 is fixedly arranged on the outer wall of the fixed chassis 1. A transmission cavity 7 is arranged in the fixed block 4. A first transmission shaft 8 is rotated by a first motor in the transmission cavity 7. A plurality of screws 11 extending to the outer wall of the fixed block 4 are also rotated in the transmission cavity 7. The plurality of screws 11 are connected to the first transmission shaft 8 through a first rotating mechanism. The first rotating mechanism comprises a first driving gear 9 fixedly arranged on the outer wall of the first transmission shaft 8. A first transmission gear 10 meshing with the first driving gear 9 is fixedly arranged at the end of the screw 11. Both the first driving gear 9 and the first transmission gear 10 are bevel gears and are vertically meshed.

[0026] The outer walls of the multiple screw rods 11 are all threadedly connected with connecting rods 5, and the multiple connecting rods 5 are all cooperated with the fixed block 4 through a limiting mechanism. The limiting mechanism includes a limiting rod 12 fixedly connected to the outer wall of the fixed block 4, and the outer wall of the connecting rod 5 is provided with a limiting hole corresponding to the limiting rod 12. The limiting rod 12 cooperates with the limiting hole to prevent the connecting rod 5 from being completely separated from the screw rod 11. The vertical cross-section of the limiting rod 12 and the limiting hole are both T-shaped.

[0027] Multiple connecting rods 5 are connected to the two movable chassis 2 through a mounting mechanism. The mounting mechanism includes a mounting block 6 fixedly connected to the end of the connecting rod 5. The mounting block 6 is connected to the outer wall of the movable chassis 2 through multiple mounting bolts. The mounting bolts are used to achieve convenient disassembly and assembly between the connecting rod 5 and the movable chassis 2.

[0028] A through-type movable channel 13 is provided on the fixed chassis 1, and a groove 14 is provided at one end of the two movable chassis 2. The two movable chassis 2 are located in the movable channel 13 and are connected to the fixed chassis 1 through a connecting mechanism. The connecting mechanism includes a connecting block 15 arranged on the inner wall of the movable channel 13 on the fixed chassis 1, and a connecting groove 16 corresponding to the connecting block 15 is provided on the outer wall of the movable chassis 2. The connecting block 15 and the connecting groove 16 are also T-shaped in vertical section. With the help of the connecting block 15 and the connecting groove 16, the stability of the movable chassis 2 when moving relative to the fixed chassis 1 is achieved.

[0029] An output shaft 17 that cooperates with the track assembly 3 is rotatably provided on both movable chassis 2. Two fixed shafts 20 are provided in the movable channel 13 through a stabilizing mechanism. The stabilizing mechanism includes a stabilizing ring 22 rotatably sleeved on the outside of the fixed shaft 20. The stabilizing ring 22 is stably set in the movable channel 13 through two stabilizing bars 23 on its outer wall. The stabilizing ring 22 cooperates with the stabilizing bar 23 to achieve stable support for the fixed shaft 20.

[0030] A second transmission shaft 18 is also provided in the movable channel 13 and is rotated by a second motor. Both fixed shafts 20 are connected to the second transmission shaft 18 through a second transmission mechanism. The second transmission mechanism includes a second driving gear 19 fixedly arranged on the outer wall of the second transmission shaft 18. A second transmission gear 21 meshing with the second driving gear 19 is fixedly arranged at the end of the fixed shaft 20. The second driving gear 19 and the second transmission gear 21 are also bevel gears and are vertically meshed.

[0031] Both fixed shafts 20 are connected to the output shaft 17 through a clamping mechanism, which includes a plurality of clamping strips 24 arranged on the outer wall of the fixed shaft 20. The output shaft 17 is provided with a connecting groove corresponding to the fixed shaft 20, and the inner wall of the connecting groove is provided with a plurality of clamping grooves corresponding to the clamping strips 24. The clamping strips 24 and the clamping grooves realize the movable clamping between the fixed shaft 20 and the output shaft 17.

[0032] When the present invention is used, starting the first motor can drive the first transmission shaft 8 to rotate, and the rotation of the first transmission shaft 8 can drive the first driving gear 9 fixed on its outer wall to rotate, and the rotation of the first driving gear 9 can cooperate with the first transmission gear 10 to drive the screw 11 to rotate, and when the screw 11 rotates, the connecting rod 5 threadedly connected thereto can drive the movable chassis 2 to move in the movable channel 13, and the two movable chassis 2 can move away from or close to each other, which can drive the crawler assembly 3 to move to adjust the spacing, so that the working vehicle can adapt to various road environments;

[0033] When the connecting rod 5 drives the movable chassis 2 to move relative to the fixed chassis 1, the output shaft 17 arranged on the movable chassis 2 and connected to the track assembly 3 will slide and move on the outer wall of the fixed shaft 20. Since the clamping strip 24 is provided and cooperates with the connecting groove and the clamping groove in the connecting groove, it can always rotate with the fixed shaft 20 to realize power transmission. The specific power transmission is: start the second motor, the second motor can drive the second transmission shaft 18 to rotate, the second transmission shaft 18 can drive the second driving gear 19 to rotate, the rotation of the second driving gear 19 can cooperate with the second transmission gear 21 to drive the fixed shaft 20 to rotate, and the fixed shaft 20 cooperates with the clamping strip 24 and the clamping groove to realize the rotation of the output shaft 17.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A crawler chassis structure with variable width for an aerial work vehicle, comprising a fixed chassis (1), two movable chassis (2) and a crawler assembly (3), characterized in that: A fixed block (4) is fixedly provided on the outer wall of the fixed chassis (1), a transmission chamber (7) is provided in the fixed block (4), a first transmission shaft (8) is provided in the transmission chamber (7) for rotation by a first motor, a plurality of screw rods (11) extending to the outer wall of the fixed block (4) are also rotatably provided in the transmission chamber (7), the plurality of screw rods (11) are connected to the first transmission shaft (8) via a first rotation mechanism, the outer walls of the plurality of screw rods (11) are threadedly connected to connecting rods (5), and the plurality of connecting rods (5) are connected to the fixed block (4) via a limiting mechanism. ), the limiting mechanism comprises a limiting rod (12) fixedly connected to the outer wall of the fixed block (4), the outer wall of the connecting rod (5) is provided with a limiting hole corresponding to the limiting rod (12), a plurality of the connecting rods (5) are connected to the two movable chassis (2) through a mounting mechanism, the mounting mechanism comprises a mounting block (6) fixedly connected to the end of the connecting rod (5), the mounting block (6) is connected to the outer wall of the movable chassis (2) through a plurality of mounting bolts, a through-type movable channel (13) is provided on the fixed chassis (1), and the two movable chassis ( 2) one end of each of the two movable chassis (2) is provided with a groove (14), the two movable chassis (2) are located in the movable channel (13) and are connected to the fixed chassis (1) through a connection mechanism, the connection mechanism comprises a connection block (15) arranged on the inner wall of the movable channel (13) on the fixed chassis (1), the outer wall of the movable chassis (2) is provided with a connection groove (16) corresponding to the connection block (15), the two movable chassis (2) are rotatably penetrated by an output shaft (17) that cooperates with the crawler assembly (3), and the movable channel (13) is provided with a stabilizing mechanism. There are two fixed shafts (20), and a second transmission shaft (18) is also provided in the movable channel (13) for rotation by a second motor. The two fixed shafts (20) are connected to the second transmission shaft (18) through a second transmission mechanism, and the second transmission mechanism comprises a second driving gear (19) fixedly arranged on the outer wall of the second transmission shaft (18). A second transmission gear (21) meshing with the second driving gear (19) is fixedly arranged at the end of the fixed shaft (20), and the two fixed shafts (20) are connected to the output shaft (17) through a clamping mechanism.

2. The variable width crawler chassis structure of an aerial work vehicle according to claim 1, characterized in that: The first rotating mechanism comprises a first driving gear (9) fixedly arranged on the outer wall of the first transmission shaft (8), and a first transmission gear (10) meshing with the first driving gear (9) is fixedly arranged on the end of the screw rod (11).

3. The crawler chassis structure with variable width for aerial work vehicles according to claim 2, characterized in that: The stabilizing mechanism comprises a stabilizing ring (22) rotatably sleeved on the outside of a fixed shaft (20); the stabilizing ring (22) is stably arranged in the movable channel (13) via two stabilizing rods (23) on its outer wall.

4. The crawler chassis structure with variable width for aerial work vehicles according to claim 3, characterized in that: The clamping mechanism comprises a plurality of clamping strips (24) arranged on the outer wall of the fixed shaft (20); the output shaft (17) is provided with a connecting groove corresponding to the fixed shaft (20); and the inner wall of the connecting groove is provided with a plurality of clamping grooves corresponding to the clamping strips (24).

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