Pivot steering mechanism of wrecker

Abstract

The utility model relates to the technical field of vehicle steering, in particular to an in-situ steering mechanism of a wrecker, which adopts rear wheels of the wrecker as a driving source, is simple in structure, and can meet requirements, reduce cost and simplify operation by adopting a hydraulic cylinder with a small specification. Comprising a frame, two rear wheels and two front wheels. The rotary table is located below the frame, the two sets of supporting legs are oppositely arranged on the front side and the rear side of the rotary table, the lower ends of the two sets of supporting legs are hinged to the rotary end of the rotary table, the upper ends of the two sets of supporting legs are movably connected with the frame, and the transmission shaft is rotationally installed at the rotary end of the rotary table; the driven wheel is mounted on the transmission shaft, the driven shaft is rotatably mounted at the rotating end of the turntable, a transmission assembly is arranged between the transmission shaft and the driven shaft, the driven shaft is longitudinally parallel to the frame, and the driving wheel is mounted at the end of the driven shaft and is in frictional contact with the ground.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of vehicle steering, in particular to a wrecker in-place steering mechanism. BACKGROUND

[0002] The wrecker needs to clean up the accident vehicle on the congested road surface, and in order to improve the wrecker efficiency, the in-place steering mechanism is installed to make the wrecker in-place steering. The prior art discloses a wrecker in-place steering mechanism with the patent number CN222040324U, which comprises a sliding seat, a horizontal hydraulic cylinder and two rotating seats, the rotating seat is rotatably installed at the bottom end of the wrecker frame, the first vertical hydraulic cylinder and the first guide telescopic rod are fixedly installed on the rotating seat, the lower end of the first vertical hydraulic cylinder is provided with a steering wheel frame, the steering wheel frame is provided with a steering wheel, and the rotating power source is installed on one of the steering wheel frames; the horizontal hydraulic cylinder is fixedly connected with the wrecker frame, the output end of the horizontal hydraulic cylinder is fixedly connected with the sliding seat, the lower end of the sliding seat is fixedly provided with a sleeve and a second vertical hydraulic cylinder, the telescopic end of the first guide telescopic rod is rotatably connected with the sleeve, and the lower end of the second vertical hydraulic cylinder is rotatably provided with a center support seat. The center support seat and the two steering wheels are in contact with the ground, the rotating power source drives the steering wheel to rotate, the steering wheel rotates around the center support seat, and the in-place steering is realized.

[0003] However, the above-mentioned steering mechanism still needs to configure the rotating power source to drive the steering wheel to rotate, the structure is relatively complex, and all the front and rear wheels need to be separated from the ground, so that a large specification hydraulic cylinder is needed, which is not conducive to reducing the cost and simplifying the operation. UTILITY MODEL CONTENTS

[0004] In order to solve the above technical problems, the utility model provides a wrecker in-place steering mechanism which adopts the rear wheel of the vehicle as the driving source, the structure is relatively simple, a smaller specification hydraulic cylinder can meet the requirements, the cost is reduced and the operation is simplified.

[0005] The utility model discloses a clearing vehicle in situ steering mechanism, including frame, two rear wheels and two front wheels, two rear wheels rotate and install in the rear of frame, two front wheels rotate and install in the front of frame, still include turntable, support leg, transmission shaft, driven wheel, driven shaft, drive wheel and transmission assembly, the lower part of turntable is ground terminal for the lower of turntable, the upper part of turntable is rotating end, support leg sets two groups, two groups of support leg are opposite and arranged in the front and back of turntable, the lower end of two groups of support leg is hinged with the rotating end of turntable, the upper end of two groups of support leg is movably connected with frame, transmission shaft rotates and installs on the rotating end of turntable, driven wheel installs on transmission shaft, and driven wheel and rear wheel's wheel surface friction contact, driven shaft rotates and installs on the rotating end of turntable, and transmission assembly is arranged between transmission shaft and driven shaft, and driven shaft is with the longitudinal parallel of frame, and drive wheel installs in the end of driven shaft, and drive wheel and ground friction contact, when frame needs in situ steering, the upper end of two groups of support leg moves close along frame, makes two groups of support leg rotate to vertical state, and the turntable is pressed to the ground on, and the rear of frame is supported, makes two rear wheels and ground separate, and the wheel surface friction contact of driven wheel and rear wheel is adjusted to two front wheels to the maximum steering angle, and the operation vehicle makes rear wheel rotate, and the rear wheel friction drive driven wheel rotates, and driven wheel drives transmission shaft to rotate, and transmission shaft drives driven shaft and drive wheel to rotate through transmission assembly, and drive wheel and ground friction, thereby drive the rotating end of turnplate to rotate, and the rotating end of turnplate drives frame to rotate through two groups of support leg, realize the in situ steering of clearing vehicle, in the process of in situ steering, two front wheels roll and support the front of frame, compared with prior art, need not additional drive source, and the structure is relatively simple, and only need two rear wheels of the rear of clearing vehicle and ground separate, thereby adopt the smaller specification's hydraulic cylinder to meet the requirement, is favorable for reducing cost and simplifying operation.

[0006] Preferably, the transmission shaft comprises a bearing seat, a sleeve and a polygonal shaft pipe, the bearing seat is installed on the rotating end of the turntable, the sleeve is rotatably installed on the bearing seat, the sleeve is vertically arranged with the frame, the inside of the sleeve is provided with a polygonal hole, the polygonal shaft pipe is slidably inserted into the polygonal hole of the sleeve, and the driven wheel is concentrically installed on the end of the polygonal shaft pipe; the polygonal shaft pipe and the polygonal hole of the sleeve are matched to realize the transmission connection of the polygonal shaft pipe and the sleeve, the polygonal shaft pipe slides along the polygonal hole of the sleeve, the position of the driven wheel is adjusted, the driven wheel can be frictionally transmitted with the wheel surface of the rear wheel after being pulled out, and the driven wheel can be separated from the rear wheel after being inserted, so that the driven wheel is convenient to store and use.

[0007] Preferably, the transmission assembly comprises a worm and a worm wheel, the worm is concentrically installed on the sleeve, the worm wheel is concentrically installed on the driven shaft, and the worm wheel is engaged with the worm; the driven wheel drives the polygonal shaft pipe and the sleeve to rotate when rotating, the sleeve drives the worm to rotate, the worm engages the worm wheel to drive the driven shaft and the drive wheel to rotate, and the transmission efficiency is high.

[0008] Preferably, the polygonal shaft pipe further comprises a middle shaft rod, a sliding slot and a jacking rod, the side wall of the polygonal shaft pipe is provided with a insertion hole, the insertion hole is located in the inner wall of the sleeve pipe, the middle shaft rod is rotatably inserted into the polygonal shaft pipe, the outer end of the middle shaft rod is provided with a handle, the inner end of the middle shaft rod is provided with a sliding slot, the one end of the sliding slot is deeper than the other end, the jacking rod is slidably inserted into the insertion hole of the polygonal shaft pipe, and the inner end of the jacking rod is slidably connected with the sliding slot; the handle is used for rotating the middle shaft rod, the middle shaft rod drives the sliding slot to rotate by a certain angle, the inner end of the jacking rod is moved from the shallow end of the sliding slot to the deep end of the sliding slot, the outer end of the jacking rod is retracted into the insertion hole of the polygonal shaft pipe, the outer end of the jacking rod is separated from the inner wall of the sleeve pipe, the polygonal shaft pipe can move along the sleeve pipe, the handle is reversely rotated, the middle shaft rod drives the sliding slot to reverse rotate by a certain angle, the inner end of the jacking rod is moved from the deep end of the sliding slot to the shallow end of the sliding slot, the outer end of the jacking rod is extended out of the insertion hole of the polygonal shaft pipe, the outer end of the jacking rod is pressed against the inner wall of the sleeve pipe, the position of the polygonal shaft pipe and the sleeve pipe is locked, and the stability is improved.

[0009] Preferably, the utility model further comprises a double -end hydraulic cylinder and two sliding blocks, the lower end surface of the frame is provided with a slide rail, the fixed end of the double -end hydraulic cylinder is installed in the middle part of the slide rail of the frame, the piston rod of the both ends of double -end hydraulic cylinder is connected with two sliding blocks respectively, two sliding blocks are slidably installed on the slide rail of the frame, and the upper end of two groups of support legs is rotatably connected with two sliding blocks.

[0010] Preferably, the utility model further comprises an intermediate sliding block, a threaded seat and a screw rod, the fixed end of the double -end hydraulic cylinder is slidably installed on the slide rail of the frame through the intermediate sliding block, the threaded seat is installed on the fixed end of the double -end hydraulic cylinder, the screw rod is rotatably installed on the frame, and the threaded seat is rotatably screwed with the screw rod.

[0011] Preferably, the utility model further comprises a direction lug, and the direction lug is installed on the end of the screw rod.

[0012] Compared with the prior art, the utility model has the advantages that no additional driving source is needed, the structure is relatively simple, only two rear wheels of the wrecker rear part are needed to be separated from the ground, a smaller specification hydraulic cylinder can meet the requirements, the cost is reduced, and the operation is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the utility model;

[0014] Figure 2 is a side view structural schematic view of the utility model;

[0015] Figure 3 is an axonometric view structural schematic view of the utility model;

[0016] Figure 4 is a structural schematic view of the turntable, the supporting leg, the driven wheel, the driving wheel and the double-end hydraulic cylinder etc. structure;

[0017] Figure 5 is a structural schematic view of the driven wheel, the driven shaft and the driving wheel etc. structure;

[0018] Figure 6 is an exploded structural schematic view of the driven wheel, the polygonal shaft tube, the middle shaft rod, the sliding groove and the ejector rod etc. structure.

[0019] Markings in the drawing: 1, frame; 2, rear wheel; 3, front wheel; 4, turntable; 5, supporting leg; 6, transmission shaft; 7, driven wheel; 8, driven shaft; 9, driving wheel; 10, worm; 11, worm wheel; 12, bearing seat; 13, sleeve; 14, polygonal shaft tube; 15, middle shaft rod; 16, sliding groove; 17, ejector rod; 18, double-end hydraulic cylinder; 19, sliding block; 20, middle sliding block; 21, threaded seat; 22, screw rod; 23, direction protruding block. DETAILED DESCRIPTION

[0020] In order to facilitate understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings. The utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive. EMBODIMENT

[0021] As Figures 1 to 5As shown, a clearing vehicle in situ steering mechanism, including a frame 1, two rear wheels 2 and two front wheels 3, two rear wheels 2 are rotatably mounted on the rear of the frame 1, two front wheels 3 are rotatably mounted on the front of the frame 1; It also includes a turntable 4, a support leg 5, a transmission shaft 6, a driven wheel 7, a driven shaft 8, a drive wheel 9 and a transmission assembly, the turntable 4 is located below the frame 1, the lower part of the turntable 4 is the ground end, the upper part of the turntable 4 is the rotating end, the support leg 5 is provided in two groups, the two groups of support legs 5 are oppositely arranged on the front and rear sides of the turntable 4, the lower ends of the two groups of support legs 5 are hingedly connected with the rotating end of the turntable 4, the upper ends of the two groups of support legs 5 are movably connected with the frame 1, the transmission shaft 6 is rotatably mounted on the rotating end of the turntable 4, the driven wheel 7 is mounted on the transmission shaft 6, the driven wheel 7 is in frictional contact with the wheel surface of the rear wheel 2, the driven shaft 8 is rotatably mounted on the rotating end of the turntable 4, the transmission assembly is arranged between the transmission shaft 6 and the driven shaft 8, the driven shaft 8 is longitudinally parallel to the frame 1, the drive wheel 9 is mounted on the end of the driven shaft 8, and the drive wheel 9 is in frictional contact with the ground; The transmission shaft 6 includes a bearing seat 12, a sleeve 13 and a polygonal shaft tube 14, the bearing seat 12 is mounted on the rotating end of the turntable 4, the sleeve 13 is rotatably mounted on the bearing seat 12, the sleeve 13 is arranged vertically to the frame 1, the inside of the sleeve 13 is provided with a polygonal hole, the polygonal shaft tube 14 is slidably inserted into the polygonal hole of the sleeve 13, and the driven wheel 7 is concentrically mounted on the end of the polygonal shaft tube 14; The transmission assembly includes a worm 10 and a worm wheel 11, the worm 10 is concentrically mounted on the sleeve 13, the worm wheel 11 is concentrically mounted on the driven shaft 8, and the worm wheel 11 is engaged with the worm 10; It also includes a double-headed hydraulic cylinder 18 and two sliding blocks 19, the lower end surface of the frame 1 is provided with a sliding rail, the fixed end of the double-headed hydraulic cylinder 18 is mounted in the middle of the sliding rail of the frame 1, the piston rods at both ends of the double-headed hydraulic cylinder 18 are respectively connected with the two sliding blocks 19, the two sliding blocks 19 are slidably mounted on the sliding rail of the frame 1, and the upper ends of the two groups of support legs 5 are rotatably connected with the two sliding blocks 19.

[0022] The two piston rods of the double-head hydraulic cylinder 18 are synchronously extended to push the two sliding blocks 19 to move away along the sliding rails synchronously, so that the two sliding blocks 19 drive the two groups of supporting legs 5 to lay flat to the front and rear sides, so that the two groups of supporting legs 5 raise and store the turntable 4 under the vehicle frame 1. When the vehicle frame 1 needs to turn in place, the two piston rods of the double-head hydraulic cylinder 18 are synchronously retracted to pull the two sliding blocks 19 to move close along the rails synchronously, so that the two sliding blocks 19 drive the two groups of supporting legs 5 to rotate to the vertical state, abut the turntable 4 to the ground, and support the rear part of the vehicle frame 1, so that the two rear wheels 2 are separated from the ground, the driven wheel 7 is in frictional contact with the wheel surface of the rear wheel 2, the two front wheels 3 are adjusted to the maximum steering angle, the rear wheel 2 is rotated by operating the vehicle, the driven wheel 7 is rotated by the frictional driving of the rear wheel 2, the polygonal shaft pipe 14 and the sleeve pipe 13 are rotated when the driven wheel 7 is rotated, the sleeve pipe 13 drives the worm 10 to rotate, the worm 10 engages the worm gear 11 to drive the driven shaft 8 and the driving wheel 9 to rotate, the driving wheel 9 is in friction with the ground, so as to drive the rotation of the rotating end of the turntable 4, the rotating end of the turntable 4 drives the vehicle frame 1 to rotate through the two groups of supporting legs 5, and the turning in place of the recovery vehicle is realized. In the process of turning in place, the two front wheels 3 roll to support the front part of the vehicle frame 1. Compared with the prior art, no additional driving source is needed, the structure is relatively simple, and only the two rear wheels 2 of the rear part of the recovery vehicle need to be separated from the ground, so that a smaller specification hydraulic cylinder can meet the requirements, which is beneficial to reduce the cost and simplify the operation.

[0023] The polygonal holes of the polygonal shaft pipe 14 and the sleeve pipe 13 are matched to realize the transmission connection of the polygonal shaft pipe 14 and the sleeve pipe 13. The polygonal shaft pipe 14 slides along the polygonal hole of the sleeve pipe 13 to adjust the position of the driven wheel 7, so that the driven wheel 7 can be in frictional transmission with the wheel surface of the rear wheel 2 after being pulled out, and can be separated from the rear wheel 2 after being inserted. Embodiment 1

[0024] As Figure 6As shown, based on Embodiment 1, it further includes a central shaft 15, a sliding groove 16, and a top rod 17. An insertion hole is provided on the side wall of the polygonal shaft tube 14, located inside the sleeve 13. The central shaft 15 is rotatably inserted into the polygonal shaft tube 14. A handle is provided at the outer end of the central shaft 15. A sliding groove 16 is provided on the outer side wall of the inner end of the central shaft 15, with one end of the sliding groove 16 being deeper than the other. The top rod 17 is slidably inserted into the insertion hole of the polygonal shaft tube 14, with its inner end slidably connected to the sliding groove 16. By rotating the central shaft 15 through the handle, the central shaft 15 drives the sliding groove 16 to rotate at a certain angle, causing the inner end of the top rod 17 to exit the sliding groove. The shallow end of 16 moves to the deep end of the slide 16, causing the outer end of the push rod 17 to retract into the insertion hole of the polygonal shaft tube 14, thus disengaging the outer end of the push rod 17 from the inner wall of the sleeve 13. At this time, the polygonal shaft tube 14 can move along the sleeve 13. By reversing the handle to turn the central shaft 15, the central shaft 15 drives the slide 16 to reverse at a certain angle, causing the inner end of the push rod 17 to move from the deep end of the slide 16 to the shallow end of the slide 16, causing the outer end of the push rod 17 to extend out of the insertion hole of the polygonal shaft tube 14, thus pressing the outer end of the push rod 17 against the inner wall of the sleeve 13. At this time, the positions of the polygonal shaft tube 14 and the sleeve 13 are locked, improving stability. Example 2

[0025] like Figure 4 As shown, based on embodiment 2, it also includes an intermediate slider 20, a threaded seat 21, and a screw 22. The fixed end of the double-headed hydraulic cylinder 18 is slidably mounted on the slide rail of the frame 1 through the intermediate slider 20. The threaded seat 21 is mounted on the fixed end of the double-headed hydraulic cylinder 18. The screw 22 is rotatably mounted on the frame 1. The threaded seat 21 and the screw 22 are rotatably screwed together. It also includes a directional protrusion 23, which is mounted on the end of the screw 22.

[0026] Rotating the screw 22 causes it to engage with the threaded seat 21, thereby driving the double-headed hydraulic cylinder 18 to move along the slide rail via the intermediate slider 20. This allows for adjustment of the front and rear positions of the two sets of outriggers 5, turntable 4, and other structures, enabling different on-the-spot steering axes and improving steering flexibility. The directional protrusion 23 facilitates the rotation of the screw 22, enhancing practicality.

[0027] like Figures 1 to 6As shown, the in-situ steering mechanism of the wrecker, when working, first, when the vehicle frame 1 needs to steer in situ, the two piston rods of the double-head hydraulic cylinder 18 are synchronously retracted to pull the two sliding blocks 19 to synchronously approach along the track, so that the two sliding blocks 19 drive the two groups of supporting legs 5 to stand up, the rotating disc 4 is abutted to the ground, and the rear part of the vehicle frame 1 is supported, so that the two rear wheels 2 are separated from the ground, then the handle is rotated to rotate the central shaft rod 15, the central shaft rod 15 drives the sliding groove 16 to rotate by a certain angle, so that the inner end of the jacking rod 17 moves from the shallow end of the sliding groove 16 to the deep end of the sliding groove 16, so that the outer end of the jacking rod 17 is retracted into the insertion hole of the polygonal shaft pipe 14, so that the outer end of the jacking rod 17 is separated from the inner wall of the sleeve pipe 13, at this time, the polygonal shaft pipe 14 can move along the sleeve pipe 13, the handle is reversed to rotate the central shaft rod 15, the central shaft rod 15 drives the sliding groove 16 to reverse by a certain angle, so that the inner end of the jacking rod 17 moves from the deep end of the sliding groove 16 to the shallow end of the sliding groove 16, so that the outer end of the jacking rod 17 is extended out of the insertion hole of the polygonal shaft pipe 14, so that the outer end of the jacking rod 17 is pressed against the inner wall of the sleeve pipe 13, at this time, the position of the polygonal shaft pipe 14 and the sleeve pipe 13 is locked, then the driven wheel 7 is in frictional contact with the wheel surface of the rear wheel 2, the two front wheels 3 are adjusted to the maximum steering angle, the vehicle is operated to rotate the rear wheel 2, the rear wheel 2 frictionally drives the driven wheel 7 to rotate, the driven wheel 7 drives the transmission shaft 6 to rotate, the transmission shaft 6 drives the driven shaft 8 and the driving wheel 9 to rotate through the transmission assembly, the driving wheel 9 is in friction with the ground, so as to drive the rotating end of the rotating disc 4 to rotate, the rotating end of the rotating disc 4 drives the vehicle frame 1 to rotate through the two groups of supporting legs 5, and the in-situ steering of the wrecker is realized, finally, in the process of in-situ steering, the two front wheels 3 can roll to support the front part of the vehicle frame 1.

[0028] The main function realized by the utility model is:

[0029] 1. The vehicle rear wheel is used as a driving source, and the structure is relatively simple.

[0030] 2. Only the two rear wheels 2 of the rear part of the wrecker are separated from the ground, so that a smaller specification hydraulic cylinder can meet the requirements.

[0031] 3. The in-situ steering axis of the wrecker can be adjusted, and the steering flexibility is improved.

[0032] The installation mode, connection mode or setting mode of the in-situ steering mechanism of the wrecker are common mechanical modes, and any mode that can achieve the beneficial effects can be implemented; the frame 1, rear wheel 2, front wheel 3, rotating disc 4, transmission shaft 6, driven wheel 7, driven shaft 8, driving wheel 9, worm 10, worm wheel 11, sleeve 13, polygonal shaft tube 14, middle shaft rod 15, double-head hydraulic cylinder 18, sliding block 19, middle sliding block 20, threaded seat 21, screw rod 22, direction protruding block 23 of the in-situ steering mechanism of the wrecker are purchased on the market, and the technical personnel in the industry only need to install and operate according to the attached instruction manual, and the technical personnel in the field do not need to pay creative labor.

[0033] All the technical and scientific terms used herein have the same meanings as those commonly understood by the technical personnel belonging to the technical field of the utility model. The terms used in the specification of the utility model herein are only for the purpose of describing the specific embodiments, and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for the ordinary technical personnel in the technical field, several improvements and modifications can be made without departing from the technical principles of the utility model, and these improvements and modifications should be regarded as the protection scope of the utility model.

Claims

1. A wrecker in-situ steering mechanism, comprising a frame (1), two rear wheels (2) and two front wheels (3), the two rear wheels (2) being rotatably mounted at the rear of the frame (1), and the two front wheels (3) being rotatably mounted at the front of the frame (1); characterized in that, The transmission assembly further comprises a worm (10) and a worm wheel (11), the worm (10) is concentrically installed on the sleeve pipe (13), and the worm wheel (11) is concentrically installed on the driven shaft (8).

2. A wrecker in-place steering mechanism as in claim 1, wherein, The transmission assembly further comprises a middle shaft rod (15), a sliding groove (16) and a top rod (17), the sidewall of the polygonal shaft pipe (14) is provided with a bushing, the bushing is located in the inside of the sleeve pipe (13), the middle shaft rod (15) is rotatably inserted into the inside of the polygonal shaft pipe (14), the outer end of the middle shaft rod (15) is provided with a handle, the inner end of the middle shaft rod (15) is provided with the sliding groove (16) on the outer sidewall, one end of the sliding groove (16) is deeper than the other end, the top rod (17) is slidably inserted into the bushing of the polygonal shaft pipe (14), and the inner end of the top rod (17) is slidably connected with the sliding groove (16).

3. A wrecker in-place steering mechanism as in claim 2, wherein, The transmission assembly further comprises a double-head hydraulic cylinder (18) and two sliding blocks (19), the lower end surface of the frame (1) is provided with a sliding rail, the fixed end of the double-head hydraulic cylinder (18) is installed in the middle of the sliding rail of the frame (1), the piston rods at the two ends of the double-head hydraulic cylinder (18) are connected with the two sliding blocks (19) respectively, the two sliding blocks (19) are slidably installed on the sliding rail of the frame (1), and the upper ends of the two groups of supporting legs (5) are rotatably connected with the two sliding blocks (19) respectively.

4. A w'heelie mechanism for a recovery vehicle as set forth in claim 2, characterized in that, ​ 5. A wrecker in-place steering mechanism as in claim 1, wherein, ​ 6. A wrecker in-place steering mechanism as in claim 5, wherein, It also comprises an intermediate sliding block (20), a threaded seat (21) and a screw rod (22), the fixed end of the double-end hydraulic cylinder (18) is slidably installed on the slide rail of the vehicle frame (1) through the intermediate sliding block (20), the threaded seat (21) is installed on the fixed end of the double-end hydraulic cylinder (18), the screw rod (22) is rotatably installed on the vehicle frame (1), and the threaded seat (21) is rotatably screwed with the screw rod (22).

7. A wrecker in-place steering mechanism as in claim 6, wherein, It also comprises a direction protrusion (23), and the direction protrusion (23) is installed at the end of the screw rod (22).

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