CN217320362U - Tourist coach bogie - Google Patents

Abstract

The utility model provides a tourist car bogie, include: support body and actuating mechanism, walking subassembly, gyration supporting mechanism and wheel body mechanism of setting on the support body, actuating mechanism includes: motor element and brake assembly, motor element pass through traction motor and walking wheel drive connection of subassembly, and brake assembly sets up in one side of traction motor and cooperates with traction motor through the brake disc, and gyration supporting mechanism includes: gyration subassembly and damper, gyration subassembly set up and be connected with outside vehicle in the upper end of support body, damper arranges in between gyration subassembly and the support body, and wheel body mechanism sets up the stability that the support body was realized in the lower tip of support body and outside guide rail cooperation. The utility model relates to a tourist car bogie walking is better with cross curved stability, and inner structure sets up rationally, holistic simple structure, and operation cost of maintenance is lower, and use experience effect is better.

Description

Tourist car bogie

Technical Field

The utility model relates to a cable car bogie technical field, in particular to sight-seeing bus bogie.

Background

With the development of the amusement industry, large amusement parks and amusement parks in large commercial districts are continuously appeared and shown in new views. Because the large-scale amusement park occupies a large area, has the characteristics of more tourists and the like, the requirement of sightseeing around the whole park is generated, the problem of solving the flow of personnel is also generated, and the unique structure of the tourist car ensures that the tourist car is not influenced by the weather of rain and snow outside and has more advantages; frequent vibration can take place for the tourist car because of the road is uneven or other external factors in the in-process of walking, current tourist car bogie only is equipped with one and hangs or a shock attenuation, the bogie passes through the core disc with the carriage and is connected with the side bearing, the side bearing can take place slip dry friction with the automobile body when the tourist car takes place to turn to, form great frictional resistance and be unfavorable for the tourist car to cross little curve route, the while friction still can produce great noise, influence the travelling comfort of taking, its structure of current tourist car is most comparatively complicated in addition, in case break down its operation maintenance or emergency rescue are all comparatively troublesome under emergency, use cost is greatly improved, therefore a novel structure is urgently needed, tourist car bogie with diversified function

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a tourist car bogie that whole walking stability is better, can realize that rescue is assisted walking, two and is shock attenuation and braking speed reduction effect is better, overall structure is simple and functional stronger.

(II) technical scheme

In order to solve the technical problem, the utility model discloses a tourist car bogie, include: support body and setting are in actuating mechanism, walking subassembly, gyration supporting mechanism and wheel body mechanism on the support body, actuating mechanism includes: motor element and brake assembly, motor element pass through traction motor with walking wheel drive of walking subassembly is connected, brake assembly sets up one side of traction motor and through the brake disc with the traction motor cooperation, gyration supporting mechanism includes: the steering bogie comprises a rotary component and a damping component, wherein the rotary component is arranged at the upper end of a bogie body and connected with an external vehicle, the damping component is arranged between the rotary component and the bogie body, a wheel body mechanism is arranged at the lower end part of the bogie body and matched with an external guide rail to realize the stability of the bogie body, the motor component can drive the walking component to realize the walking of the bogie on the guide rail, the braking component can be arranged to realize the braking and decelerating effect on the walking component, the normal walking and stopping effect of the bogie can be ensured, the rotary component and the damping component can ensure the stable connection between the tourist coach and the bogie body, the declination between the bogie and a vehicle body in the process of passing a curve can be realized, the integral structure is more stable, and the wheel body mechanism can play a role in stably guiding the bogie, meanwhile, when the travelling wheels are blown out, the wheels can still support the vehicle to rescue and walk under the weight of the vehicle, the vehicle can be rescued by pulling the rescue vehicle, and the overall structure is more reasonable.

Further, the wheel mechanism includes: leading wheel, stabilizer wheel and auxiliary wheel, the leading wheel symmetry sets up the both sides of support body, the stabilizer wheel symmetry sets up the both sides of support body, the auxiliary wheel sets up the upper end of support body just the axis direction of auxiliary wheel with the leading wheel with the stabilizer wheel is perpendicular, the leading wheel with the setting of stabilizer wheel can lead in the both sides of guide rail supplementary and stability control, makes the bogie inseparabler with the cooperation of guide rail in the walking process, can effectively reduce rocking and the skew of support body improve the user and take experience.

Further, the leading wheel sets up respectively both ends around the support body, the stabilizer wheel is arranged in between the leading wheel at both ends, the leading wheel is arranged in the top of stabilizer wheel, the leading wheel with the stabilizer wheel realizes with the both sides wall cooperation of guide rail that the direction is stable, the auxiliary wheel sets up respectively both ends around the support body and realize supplementary the regulation with the up end cooperation of guide rail, the setting of this structure can be guaranteed on the support body wheel body mechanism overall structure is more reasonable, simultaneously the setting of auxiliary wheel can be when the walking wheel takes place under the condition of blowing out, the auxiliary wheel still can support rescue walking under the weight of vehicle, pull rescue car and can realize the rescue to the vehicle, reduce the operation maintenance cost, conveniently change maintenance and processing more, holistic structure is simpler simultaneously.

Furthermore, a cavity is symmetrically formed in the frame body, and the travelling wheels are symmetrically arranged on the frame body and are arranged in the cavity; the motor assembly further includes: with the transmission shaft that traction motor connects, the one end of transmission shaft with traction motor and the brake disc is connected, the other end of transmission shaft with the walking wheel cooperation is used for driving the walking, the setting of cavity has reduced occuping of space, traction motor drive the transmission shaft is realized the walking of walking wheel is advanced, and inside structure sets up rationally, has guaranteed the normal use of bogie.

Furthermore, one side of the traction motor is connected with the frame body through a flange plate, the other side of the traction motor is connected with the brake disc through a speed reducing shaft and is matched with the brake assembly, the speed reducing shaft is arranged in a speed reducing box of the motor assembly and is connected and matched with a speed reducer in the speed reducing box, and the speed reducing shaft is utilized to play a speed reducing effect on the travelling wheel, so that the whole braking function of the bogie is ensured, the brake disc occupies less space, can be matched with the brake assembly to be used more conveniently, and the braking effect is better.

Further, the brake assembly includes: stopper and mount pad, the mount pad is fixed to be set up one side of motor element, the stopper sets up on the mount pad and through clamp with the both sides cooperation of brake disc realizes the braking of slowing down, the clamp is electrical apparatus control, after control system sends brake signal, implements the control to braking clamp through basic brake control system, and the braking clamp is right the brake disc exerts force, makes the vehicle slow down until stopping, realizes the brake function of vehicle, holistic simple structure, and braking effect is good, and the user uses more conveniently, the setting of mount pad can be guaranteed the holistic structure of brake assembly is more firm.

Further, the swing assembly includes: bearing board, backup pad, gyration support bearing and gyration support bolt, the backup pad with damper assembly connects the cooperation, gyration support bearing arranges in the bearing board with between the backup pad, the gyration is supported the bolt and is arranged in the gyration support bearing, the gyration support the lower extreme of bolt with the support body cooperation, the gyration support the upper end of bolt with bearing board fixed connection, the cooperation is connected with outside vehicle to the bearing board, and the setting of this structure is passed through the bearing board is connected with the vehicle, utilizes gyration support bearing with the gyration support bolt realizes that the vehicle crosses the declination between curve in-process automobile body and the bogie to realize the longitudinal traction between automobile body and the bogie through supporting the bolt, can effectively guarantee the stability between vehicle and the bogie, increase of service life.

Further, the shock absorbing assembly includes: shock attenuation mount pad and yielding rubber spare, the shock attenuation mount pad is arranged in the upper and lower both sides of yielding rubber spare, the shock attenuation mount pad of upper end with backup pad fixed connection, the shock attenuation mount pad of lower extreme with support body fixed connection, the backup pad with be provided with the oil pressure bumper shock absorber between the support body, utilize yielding rubber spare with the oil pressure bumper shock absorber can realize the stationarity of operation in-process vehicle, guarantees that holistic stability is better.

Further, the one end of leading wheel is passed through the rotation axis and is connected with the wheel seat, the one end of wheel seat sets up adjustably on the support body, set up on the support body with wheel seat cooperation push rod subassembly, push rod subassembly passes through the sleeve pipe setting and is in on the support body, push rod subassembly includes: arrange in push rod, dish spring spare and pretension bolt in the cover, the one end of push rod with wheel seat cooperation, its other end passes through dish spring spare with pretension bolt cooperation, the setting of this structure can pass through push rod assembly's setting is rotatory pretension bolt is right the pretightning force is applyed to the dish spring spare, dish spring spare conduction pretightning force arrives on the push rod, the push rod promotes the leading wheel implements the pretension, can guarantee the cooperation of leading wheel and guide rail, just the stabilizer wheel with the structure of leading wheel is the same, can make automobile body and bogie more stable in the in-process of marcing.

(III) advantageous effects

The utility model relates to a tourist car bogie lies in for prior art's advantage: the whole structure is simpler, the pre-tightening function can be realized through the arranged guide wheels and the auxiliary wheels, the pre-tightening matching between the bogie and the guide rails is ensured, the bogie and the vehicle body are more stable in the walking process, the auxiliary wheels can still support the weight of the vehicle for rescue walking under the condition that the tire burst of the walking wheels can be ensured by utilizing the arranged auxiliary wheels, and the rescue of the vehicle can be realized by pulling the rescue vehicle; in addition, the rotary support between the bogie and the vehicle body can be guaranteed through the rotary component and the damping component which are arranged, the damping buffering of the vehicle body is guaranteed by utilizing the secondary damping, the deflection angle between the vehicle body and the bogie in the process of the vehicle passing a curve is achieved, the whole mechanism is more reasonable in arrangement, the operation and maintenance cost of the vehicle and the bogie is effectively reduced, and the service life is prolonged.

Drawings

Fig. 1 is a perspective view of a tourist car bogie of the present invention;

fig. 2 is a bottom upward perspective view of the tourist car bogie of the present invention;

fig. 3 is a front view of a tourist car bogie of the present invention;

fig. 4 is a side view of a tourist car bogie of the present invention;

fig. 5 is a top view of a tourist car bogie of the present invention;

fig. 6 is a cross-sectional view of the guide wheel of the tourist car bogie of the present invention;

fig. 7 is a cross-sectional view of a revolving support mechanism of a tourist car bogie of the present invention;

wherein: 1 is a frame body, 101 is a cavity, 2 is a driving mechanism, 3 is a walking component, 301 is a walking wheel, 4 is a rotary supporting mechanism, 5 is a wheel body mechanism, 501 is a guide wheel, 502 is a stabilizing wheel, 503 is an auxiliary wheel, 6 is a motor component, 601 is a traction motor, 602 is a brake disc, 603 is a transmission shaft, 604 is a speed reducing shaft, 605 is a reduction box, 7 is a braking component, 701 is a brake, 711 is a clamp, 702 is a mounting seat, 8 is a rotary component, 801 is a bearing plate, 802 is a support plate, 803 is a rotary supporting bearing, 804 is a supporting bolt, 9 is a damping component, 901 is a damping mounting seat, 902 is a damping rubber component, 10 is a flange plate, 11 is an oil hydraulic damper, 12 is a rotating shaft, 13 is a wheel seat, 14 is a push rod component, 1401 is a push rod, 1402 is a disc spring component, 1403 is a pre-tightening bolt, and 15 is a sleeve.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1 to 7, a tourist car bogie includes: support body 1 and the actuating mechanism 2, the running gear 3, gyration supporting mechanism 4 and the wheel body mechanism 5 of setting on support body 1, actuating mechanism 2 includes: motor element 6 and brake assembly 7, motor element 6 pass through traction motor 601 and walking 301 drive connection of walking subassembly 3, and brake assembly 7 sets up in one side of traction motor 601 and cooperates with traction motor 601 through brake disc 602, and gyration supporting mechanism 4 includes: the steering bogie comprises a rotary component 8 and a damping component 9, wherein the rotary component 8 is arranged at the upper end of a bogie body 1 and is connected with an external vehicle, the damping component 9 is arranged between the rotary component 8 and the bogie body 1, a wheel body mechanism 5 is arranged at the lower end part of the bogie body 1 and is matched with an external guide rail to realize the stability of the bogie body 1, the traveling component 3 can be driven by the motor component 6 to realize the traveling of the bogie on the guide rail, the braking component 7 can realize the braking and decelerating effect on the traveling component 3 to ensure the normal traveling and stopping effects of the bogie, the rotary component 8 and the damping component 9 can ensure the stable connection between the tourist coach and the bogie body 1 to realize the declination between a vehicle body and the bogie in the process of bending the vehicle over a curve, so that the whole structure is more stable, and the wheel body mechanism 5 can play a role in stable guiding on the bogie, meanwhile, when the travelling wheels 301 are blown out, the wheel body mechanisms 5 can still support the weight of the vehicle for rescue travelling, the vehicle can be rescued by towing the rescue vehicle, and the overall structure is more reasonable.

Referring to fig. 2, 3 and 4, the wheel mechanism 5 includes: leading wheel 501, stabilizing wheel 502 and auxiliary wheel 503, leading wheel 501 symmetry set up in the both sides of support body 1, and stabilizing wheel 502 symmetry sets up in the both sides of support body 1, and auxiliary wheel 503 sets up the axis direction and leading wheel 501 and stabilizing wheel 502 that are perpendicular at the upper end of support body and auxiliary wheel 503, leading wheel 501 with stabilizing wheel 502's setting can be in the both sides of guide rail supplementary and stability control of leading, makes the bogie inseparabler with the cooperation of guide rail in the walking process, can effectively reduce rocking and the skew of support body improves the user and takes experience.

Referring to fig. 2, fig. 3 and fig. 4, the leading wheel 501 sets up both ends around the support body 1 respectively, and the stabilizer wheel 502 is arranged in between the leading wheel 501 at both ends, and the top of stabilizer wheel 502 is arranged in to the leading wheel 501, and leading wheel 501 and stabilizer wheel 502 realize the direction stability with the both sides wall cooperation of guide rail, and auxiliary wheel 503 sets up both ends around the support body 1 respectively and realizes supplementary regulation with the up end cooperation of guide rail, can guarantee on the support body 1 wheel body mechanism 5 overall structure is more reasonable, simultaneously under the condition that the setting of auxiliary wheel 503 can take place to explode the child as the walking wheel, the auxiliary wheel 503 still can support the weight of vehicle and rescue the walking under, and the rescue car of pulling rescue can realize the rescue to the vehicle, reduces the operation maintenance cost, and more convenient change maintenance is handled, and holistic structure is simpler simultaneously.

Referring to fig. 5, the frame body 1 is symmetrically provided with cavities 101, and the traveling wheels 301 are symmetrically arranged on the frame body 1 and are arranged in the cavities 101; the motor assembly 6 further includes: the transmission shaft 603 that is connected with traction motor 601, the one end and the traction motor 601 and the brake disc 602 of transmission shaft 603 are connected, and the other end and the walking wheel 301 cooperation of transmission shaft 603 are used for the drive to walk, the occupation in space has been reduced in the setting of cavity 101, the drive of traction motor 601 the transmission shaft 603 is realized the walking of walking wheel 301 is advanced, and inside structure sets up rationally, has guaranteed the normal use of bogie.

Referring to fig. 5, one side of a traction motor 601 is connected with a frame body 1 through a flange plate 10, the other side of the traction motor is connected with a brake disc 602 through a speed reducing shaft 604 and is matched with a brake assembly 7, the speed reducing shaft 604 is arranged in a speed reducing box 605 of a motor assembly 6 and is connected and matched with a speed reducer in the speed reducing box 605, the speed reducing shaft 604 is utilized to play a speed reducing effect on a walking wheel 301, so that the whole braking function of a bogie is ensured, the brake disc 602 occupies less space, can be matched with the brake assembly 7 to be used more conveniently, and the braking effect is better.

Referring to fig. 4 and 5, the brake assembly 7 includes: stopper 701 and mount pad 702, the fixed one side that sets up at motor element 6 of mount pad 702, stopper 701 sets up on mount pad 702 and realizes the braking of slowing down through the both sides cooperation of clamp 711 with brake disc 602, in this embodiment, clamp 711 is electrical apparatus control, and after control system sent braking signal, through the control of basic brake control system implementation to braking clamp, braking clamp 711 is right the brake disc exerts force, makes the vehicle slow down until stopping, realizes the braking function of vehicle, holistic simple structure, and braking effect is good, and the user uses more conveniently, the setting of mount pad 702 can be guaranteed the holistic structure of braking element is more firm.

Referring to fig. 2 and 7, the swivel assembly 8 includes: bearing plate 801, backup pad 802, gyration support bearing 803 and gyration support bolt 804, backup pad 802 and damper assembly 9 are connected and cooperate, and gyration support bearing 803 is arranged in between bearing plate 801 and backup pad 802, and gyration support bolt 804 is arranged in gyration support bearing 803, and the lower extreme of gyration support bolt 804 cooperates with support body 1, and the upper end of gyration support bolt 804 and bearing plate 801 fixed connection, bearing plate 801 and outside vehicle connection cooperation, through bearing plate 801 is connected with the vehicle, utilize gyration support bearing 803 with gyration support bolt 804 realize that the vehicle crosses the declination between the curve in-process automobile body and the bogie to realize the vertical traction between automobile body and the bogie through supporting bolt 804, can effectively guarantee the stability between vehicle and the bogie, increase of service life.

Referring to fig. 2 and 7, the damper assembly 9 includes: shock attenuation mount pad 901 and yielding rubber spare 902, the upper and lower both sides of yielding rubber spare 902 are arranged in to shock attenuation mount pad 901, shock attenuation mount pad 901 and the backup pad 802 fixed connection of upper end, shock attenuation mount pad 901 and support body 1 fixed connection of lower extreme, are provided with oil pressure bumper shock absorber 11 between backup pad 802 and the support body 1, utilize yielding rubber spare 902 with oil pressure bumper shock absorber 11 can realize the stationarity of operation in-process vehicle, guarantee that holistic stability is better.

Referring to fig. 6, one end of the guide wheel 501 is connected with the wheel seat 13 through the rotating shaft 12, one end of the wheel seat 13 is adjustably disposed on the frame body 1, the wheel seat 13 is disposed on the frame body 1 to cooperate with the push rod assembly 14, the push rod assembly 14 is disposed on the frame body 1 through the sleeve 15, and the push rod assembly 14 includes: the push rod 1401, the disc spring member 1402 and the pre-tightening bolt 1403 are arranged in the sleeve 15, one end of the push rod 1401 is matched with the wheel seat 13, the other end of the push rod 1401 is matched with the pre-tightening bolt 1403 through the disc spring member 1402, the pre-tightening bolt 1403 can be rotated to apply pre-tightening force to the disc spring member 1402 through arrangement of the push rod assembly 14, the disc spring member 1402 transmits the pre-tightening force to the push rod 1401, the push rod 1401 pushes the guide wheel 501 to apply pre-tightening force, matching of the guide wheel 501 and a guide rail can be guaranteed, the stabilizing wheel 502 and the guide wheel 501 are identical in structure, and a vehicle body and a bogie can be more stable in the advancing process.

The tourist car bogie can realize a pre-tightening function through the guide wheels and the auxiliary wheels, ensures the pre-tightening fit between the bogie and the guide rails, enables the bogie and a car body to be more stable in a walking process, can ensure that the auxiliary wheels can still support the weight of a car to rescue and walk under the condition of tire burst of the walking wheels by utilizing the auxiliary wheels, can realize the rescue of the car by towing the rescue car, and has a simpler integral structure; in addition, the rotary support between the bogie and the vehicle body can be guaranteed through the rotary component and the damping component which are arranged, the damping buffering of the vehicle body is guaranteed by utilizing the secondary damping, the deflection angle between the vehicle body and the bogie in the process of the vehicle passing a curve is achieved, the whole mechanism is more reasonable in arrangement, the operation and maintenance cost of the vehicle and the bogie is effectively reduced, and the service life is prolonged.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A tourist car bogie, comprising: support body (1) and setting are in actuating mechanism (2), running gear (3), gyration supporting mechanism (4) and wheel body mechanism (5) on support body (1), actuating mechanism (2) include: motor element (6) and brake assembly (7), motor element (6) through traction motor (601) with walking wheel (301) drive connection of walking subassembly (3), brake assembly (7) set up one side of traction motor (601) and through brake disc (602) with traction motor (601) cooperation, gyration supporting mechanism (4) include: gyration subassembly (8) and damper assembly (9), gyration subassembly (8) set up the upper end and the outside vehicle of support body (1) are connected, damper assembly (9) are arranged in gyration subassembly (8) with between support body (1), wheel body mechanism (5) set up the lower tip and the outside guide rail cooperation of support body (1) are realized the stability of support body (1).

2. The tourist coach bogie according to claim 1, wherein said wheel mechanism (5) comprises: leading wheel (501), stabilizing wheel (502) and auxiliary wheel (503), leading wheel (501) symmetry sets up the both sides of support body (1), stabilizing wheel (502) symmetry sets up the both sides of support body (1), auxiliary wheel (503) set up the upper end of support body just the axis direction of auxiliary wheel (503) with leading wheel (501) with stabilizing wheel (502) are the perpendicular.

3. The tourist coach bogie according to claim 2, wherein the guide wheels (501) are respectively arranged at the front end and the rear end of the frame body (1), the stabilizing wheels (502) are arranged between the guide wheels (501) at the two ends, the guide wheels (501) are arranged above the stabilizing wheels (502), the guide wheels (501) and the stabilizing wheels (502) are matched with the two side walls of the guide rail to realize guiding stability, and the auxiliary wheels (503) are respectively arranged at the front end and the rear end of the frame body (1) and are matched with the upper end surface of the guide rail to realize auxiliary adjustment.

4. The tourist coach bogie according to claim 1, wherein the frame body (1) is symmetrically provided with a cavity (101), and the travelling wheels (301) are symmetrically arranged on the frame body (1) and are arranged in the cavity (101); the motor assembly (6) further comprises: with transmission shaft (603) that traction motor (601) are connected, the one end of transmission shaft (603) with traction motor (601) and brake disc (602) are connected, the other end of transmission shaft (603) with walking wheel (301) cooperation is used for the drive walking.

5. The tourist car bogie according to claim 1, wherein one side of the traction motor (601) is connected with the frame body (1) through a flange plate (10), the other side of the traction motor is connected with the brake disc (602) through a speed reducing shaft (604) and matched with the brake assembly (7), and the speed reducing shaft (604) is arranged in a speed reducing box (605) of the motor assembly (6) and connected and matched with a speed reducer in the speed reducing box (605).

6. The tourist bogie according to claim 1, wherein said brake assembly (7) comprises: the brake comprises a brake (701) and a mounting seat (702), wherein the mounting seat (702) is fixedly arranged on one side of the motor assembly (6), and the brake (701) is arranged on the mounting seat (702) and is matched with two sides of the brake disc (602) through a clamp (711) to realize deceleration braking.

7. The tourist bogie according to claim 1, wherein said swivel assembly (8) comprises: bearing board (801), backup pad (802), gyration support bearing (803) and gyration support bolt (804), backup pad (802) with damper assembly (9) are connected the cooperation, gyration support bearing (803) are arranged in bearing board (801) with between backup pad (802), gyration support bolt (804) are arranged in gyration support bearing (803), the lower extreme of gyration support bolt (804) with support body (1) cooperation, the upper end of gyration support bolt (804) with bearing board (801) fixed connection, bearing board (801) and outside vehicle connection cooperation.

8. The tourist bogie according to claim 7, wherein said shock absorbing assembly (9) comprises: the shock absorption device comprises shock absorption mounting seats (901) and shock absorption rubber pieces (902), wherein the shock absorption mounting seats (901) are arranged on the upper side and the lower side of the shock absorption rubber pieces (902), the shock absorption mounting seats (901) at the upper ends are fixedly connected with the supporting plate (802), and the shock absorption mounting seats (901) at the lower ends are fixedly connected with the frame body (1).

9. The tourist car bogie according to claim 7, wherein an oleo-hydraulic shock absorber (11) is arranged between the support plate (802) and the frame body (1).

10. The tourist bogie according to claim 2, wherein one end of the guiding wheel (501) is connected with a wheel seat (13) through a rotating shaft (12), one end of the wheel seat (13) is adjustably arranged on the frame body (1), a push rod assembly (14) matched with the wheel seat (13) is arranged on the frame body (1), the push rod assembly (14) is arranged on the frame body (1) through a sleeve (15), and the push rod assembly (14) comprises: the push rod (1401), the disc spring piece (1402) and the pre-tightening bolt (1403) are arranged in the sleeve (15), one end of the push rod (1401) is matched with the wheel seat (13), and the other end of the push rod is matched with the pre-tightening bolt (1403) through the disc spring piece (1402).

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