Traction mechanism of self-propelled vehicle and self-propelled vehicle

Abstract

The present invention provides a traction mechanism for a self-propelled vehicle, wherein the self-propelled vehicle comprises an axle, and the traction mechanism comprises a rotating connection assembly, a telescopic mechanism and a first locking member; the rotating connection assembly is rotatably connected to the first end of the telescopic mechanism, and the second end of the telescopic mechanism is rotatably connected to the steering mechanism of the axle; the first locking member is used to lock the telescopic mechanism to limit the telescopic mechanism; the rotating connection assembly can drive the locked telescopic mechanism to drive the steering mechanism to turn by rotating. The present invention also provides a self-propelled vehicle. By adopting the present invention, there is no need to start the self-power of the self-propelled vehicle, and the traction mechanism can be used to drive the steering mechanism to turn, so that the self-driving vehicle in traction can be autonomously turned, and the steering is more flexible and convenient. When the self-propelled vehicle is disconnected from the traction vehicle and moves autonomously, the restriction of the telescopic mechanism by the first locking member is released, and the self-propelled vehicle uses its own power to drive the steering mechanism to turn.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle connecting parts, in particular to a traction mechanism of a self-propelled vehicle and the self-propelled vehicle. Background Art

[0002] A self-propelled vehicle in the prior art can be controlled to move by its own power system, or it can be driven to move by a traction vehicle when its own power system is not working.

[0003] However, the existing self-propelled vehicle is usually connected to the tractor through a towing rod fixed on the body of the self-propelled vehicle. During the towing process, the steering mechanism on the axle of the self-propelled vehicle cannot turn simultaneously with the turning of the tractor. Therefore, during the towing and turning process of the tractor, the turning radius of the self-propelled vehicle is large and the steering is not flexible. Summary of the invention

[0004] In view of this, the main purpose of the present invention is to provide a traction mechanism for a self-propelled vehicle and a self-propelled vehicle, so as to solve the problem in the prior art that the self-propelled vehicle cannot flexibly turn during the turning process of being towed by a towing vehicle.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] The present invention provides a traction mechanism of a self-propelled vehicle, the self-propelled vehicle comprises an axle, and the traction mechanism comprises a rotating connection assembly, a telescopic mechanism and a first locking member;

[0007] The rotating connection assembly is rotationally connected to the first end of the telescopic mechanism, and the second end of the telescopic mechanism is rotationally connected to the steering mechanism of the axle;

[0008] The first locking member is used to lock the telescopic mechanism to limit the telescopic mechanism;

[0009] The rotating connection assembly can drive the locked telescopic mechanism to drive the steering mechanism to steer by rotating.

[0010] Further, the telescopic mechanism is a sleeve assembly, which includes a first sleeve and a second sleeve; the first end of the first sleeve is rotatably connected to the rotating connection assembly, the second end of the first sleeve is mutually sleeved with the first end of the second sleeve, and the second end of the second sleeve is rotatably connected to the steering mechanism of the axle; the first sleeve and the second sleeve can move relative to each other along the axial direction of the sleeve.

[0011] Furthermore, a first locking hole is provided on the first sleeve, a second locking hole matching with the first locking hole is provided on the second sleeve, and the first locking member is a first latch; the first latch passes through the first locking hole and the second locking hole at the same time to limit the relative movement of the first sleeve and the second sleeve.

[0012] Furthermore, the rotating connection assembly includes a swing rod and a traction connecting rod; the first end of the swing rod is connected to the traction connecting rod, and the second end of the swing rod is rotationally connected to the first end of the telescopic mechanism.

[0013] Furthermore, the second end of the traction connecting rod is rotatably connected to the first end of the swing rod; the height of the first end of the traction connecting rod can be adjusted by rotating the traction connecting rod.

[0014] Furthermore, the rotating connection assembly also includes a second locking member, and the second locking member can limit the rotation of the traction connecting rod.

[0015] Further, the traction connecting rod is detachably arranged at the first end of the swing rod, the traction connecting rod is provided with at least one first plug hole, the first end of the swing rod is provided with a second plug hole and a third plug hole; the second plug hole and the third plug hole are arranged adjacent to each other and the second plug hole is located on a side of the third plug hole away from the second end of the swing rod;

[0016] The second locking member is a second latch, and the rotating connection assembly further includes a third latch; the second latch cooperates with the second plug hole, and the third latch cooperates with the first plug hole and the third plug hole;

[0017] The third latch passes through the first plug hole and the third plug hole at the same time, so that the traction connecting rod can rotate relative to the swing rod; the second latch is inserted into the second plug hole to limit the rotation of the traction connecting rod.

[0018] Furthermore, the traction connecting rod includes a first folding rod and a second folding rod, the second end of the first folding rod is rotatably connected to the first end of the swing rod; and the second folding rod is detachably arranged on the first folding rod.

[0019] Further, the rotating connection assembly also includes a fourth latch and a fifth latch, the first folding rod is provided with a plurality of fourth plug holes, the plurality of the fourth plug holes are arranged at intervals along the axial direction of the first folding rod, the second folding rod is provided with a plurality of fifth plug holes that cooperate with the fourth plug holes, the fourth latch passes through one pair of aligned fourth plug holes and the fifth plug holes so that the second folding rod can rotate relative to the first folding rod, and the fifth latch is inserted into another pair of aligned fourth plug holes and the fifth plug holes to limit the rotation of the traction connecting rod; and / or,

[0020] The second folding rod comprises a rod head, a buffer portion and a rod tail which are connected in sequence. The rod tail is detachably arranged on the first folding rod. The rod head can be compressed or returned relative to the rod tail through the buffer portion.

[0021] Furthermore, the buffer part includes a guide shaft, a limit nut, a buffer seat, a buffer member and a guide block;

[0022] The buffer seat has a first cavity and a first mounting hole penetrating the first cavity, and the first cavity has an opening on a side away from the first mounting hole;

[0023] The rod tail has a second cavity and a second mounting hole penetrating the second cavity, and the second mounting hole is located at the first end of the rod tail;

[0024] The first end of the rod tail is fixedly connected to the buffer seat, and the first cavity and the second cavity are connected through the second mounting hole;

[0025] The buffer member has a third mounting hole, and the diameter of the third mounting hole is smaller than the diameter of the first mounting hole;

[0026] The buffer is arranged in the first cavity, the end surface of the buffer away from the first mounting hole abuts against the end surface of the first end of the rod tail, and the third mounting hole is connected to the first mounting hole;

[0027] The guide block is sleeved in the second mounting hole, and the guide block has a fourth mounting hole, the fourth mounting hole is connected with the first mounting hole and the third mounting hole, and the aperture of the fourth mounting hole is smaller than the aperture of the third mounting hole;

[0028] A first step surface and a second step surface are formed on the guide shaft, the first step surface and the second step surface both face the second end of the guide shaft, the first step surface is located on a side of the second step surface away from the second end of the guide shaft, and the outer diameter of the first step surface is greater than the outer diameter of the second step surface;

[0029] The first end of the guide shaft is fixedly connected to the rod head, the second end of the guide shaft passes through the first mounting hole, the third mounting hole and the fourth mounting hole and extends into the second cavity, and the first step surface abuts against the end surface of the buffer member on the side close to the first mounting hole;

[0030] The limiting nut is threadedly connected to the second end of the guide shaft, and the outer diameter of the limiting nut is larger than the aperture of the fourth mounting hole, so as to lock the guide block between the second step surface and the limiting nut.

[0031] The present invention also provides a self-propelled vehicle, which includes an axle and the above-mentioned traction mechanism, the axle includes a crossbeam, a mounting seat arranged on the crossbeam and a steering mechanism installed on the crossbeam; the mounting seat includes a limiting hole, one end of the rotating connection assembly passes through the limiting hole and is rotatably connected to the first end of the telescopic mechanism, the rotating connection assembly is rotatably connected to the crossbeam through the mounting seat, and the second end of the telescopic mechanism is rotatably connected to the steering mechanism.

[0032] Furthermore, the axle further comprises a first steering knuckle and a second steering knuckle respectively arranged at both ends of the cross beam, the steering mechanism comprises a first connecting rod, a second connecting rod, a switch valve and a steering cylinder, the steering cylinder is a double-acting double-piston rod cylinder, the cylinder barrel of the steering cylinder is fixedly connected to the cross beam, and the two rod chambers of the steering cylinder are connected through the switch valve;

[0033] The two ends of the first connecting rod are respectively connected to the first steering knuckle and the first piston rod of the steering cylinder, the two ends of the second connecting rod are respectively connected to the second steering knuckle and the second piston rod of the steering cylinder, and the second end of the telescopic mechanism is rotatably connected to the first connecting rod or the second connecting rod.

[0034] The present invention provides a traction mechanism of a self-propelled vehicle and a self-propelled vehicle. By connecting the traction mechanism with the steering mechanism of the axle of the self-propelled vehicle, the telescopic mechanism is locked by a first locking member during the process of the self-propelled vehicle being towed and turned by the traction vehicle, and the self-propelled vehicle can be turned autonomously by using the traction mechanism to drive the steering mechanism to turn without starting the self-power of the self-propelled vehicle, and the steering is more flexible and convenient. When the self-propelled vehicle is disconnected from the traction vehicle and moves autonomously, the restriction of the telescopic mechanism by the first locking member is released, and the self-propelled vehicle uses its own power to drive the steering mechanism to turn. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A three-dimensional diagram of a traction mechanism of a self-propelled vehicle provided in the first embodiment of the present invention, wherein the diagram also shows an axle and a mounting seat connected to the traction mechanism;

[0036] Figure 2 for Figure 1 A top view of

[0037] Figure 3 for Figure 2 AA section view;

[0038] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0039] Figure 5 A schematic diagram of the external structure of a self-propelled vehicle provided in the second embodiment of the present invention;

[0040] Figure 6 A schematic diagram of the bottom structure of a self-propelled vehicle provided in Embodiment 2 of the present invention.

[0041] Figure numerals: traction mechanism 100; axle 200; steering mechanism 210; first connecting rod 211; second connecting rod 212; steering cylinder 213; cylinder barrel 2131; first piston rod 2132; second piston rod 2133; crossbeam 220; first steering knuckle 230; second steering knuckle 240; mounting seat 300; limiting hole 300a; rotating connection assembly 1; swing rod 11; second plug hole 11a; third plug hole 11b; traction connecting rod 12; first plug hole 12a; first folding rod 121; fourth plug hole 121a; second folding rod 122; rod head 1221; guide shaft 1222; first step surface 1222a; second Step surface 1222b; limit nut 1223; buffer seat 1224; first cavity 1224a; first mounting hole 1224b; buffer member 1225; third mounting hole 1225a; guide block 1226; fourth mounting hole 1226a; rod tail 1227; second cavity 1227a; second mounting hole 1227b; fifth plug-in hole 122a; telescopic mechanism 2; first sleeve 21; first locking hole 21a; second sleeve 22; second locking hole 22a; first locking member 3; first storage rack 4; first storage hole 4a; second locking member 5; third latch 6; fourth latch 7; fifth latch 8; second storage rack 9; second storage hole 9a. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] In the description of the present invention, for the convenience of description, "first end" and "second end" are used to distinguish the two ends of the component. This is only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number or order of the indicated technical features.

[0044] In the description of the present invention, the "upper" and "lower" directions or positional relationships are based on the normal use state of the self-driving vehicle, that is, the attached Figure 1 The orientation or position relationship shown, where “looking down” is Figure 1 The downward direction of the "height" is the Figure 1 It should be understood that these directional terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0045] The self-propelled vehicle described in the present invention refers to a vehicle that can move on its own power but is not equipped with a cab, such as a self-propelled aerial work vehicle, a self-propelled construction elevator, etc. The self-propelled vehicle has a slow travel speed and can only travel in relatively closed places such as factory areas and construction sites when traveling by itself. When towed, it can be towed on the road with a towing vehicle, which is different from general motor vehicles that can travel on roads such as highways.

[0046] Embodiment 1

[0047] Embodiment 1 of the present invention provides a traction mechanism for a self-propelled vehicle. Figure 1 and Figure 2 As shown, the traction mechanism 100 includes a rotating connection assembly 1, a telescopic mechanism 2 and a first locking member 3. The rotating connection assembly 1 is rotatably connected to a first end of the telescopic mechanism 2, and a second end of the telescopic mechanism 2 is rotatably connected to a steering mechanism 210 of an axle 200 of a self-propelled vehicle. The first locking member 3 is used to lock the telescopic mechanism 2 to limit the telescopic mechanism 2 from extending and retracting. The rotating connection assembly 1 can drive the locked telescopic mechanism 2 to drive the steering mechanism 210 to turn by rotating.

[0048] Specifically, when the first locking member 3 is in an unlocked state, the traction mechanism 100 is in a non-working state, and the self-propelled vehicle mainly relies on its own power system to control its movement. When the steering mechanism 210 generates a steering action under the control of the power system, the steering mechanism 210 will drive the telescopic mechanism 2 to move together, and because the telescopic mechanism 2 is not locked by the first locking member 3, the telescopic mechanism 2 can be freely extended and retracted, and can also rotate accordingly during the process of moving with the steering mechanism 210, so that the traction mechanism 100 will not affect the normal steering of the steering mechanism 210. When the first locking member 3 is in a locked state, the traction mechanism 100 is in a working state, and the power system of the self-propelled vehicle stops working. After the traction mechanism 100 is connected to the corresponding tractor, the self-propelled vehicle can rely on the power traction of the tractor to drive itself to move. Since the telescopic mechanism 2 is locked by the first locking member 3, the telescopic mechanism 2 cannot be extended or retracted. At this time, the telescopic mechanism 2 is equivalent to a connecting rod, and the rotating connection component 1, the telescopic mechanism 2 and the steering mechanism 210 together form a connecting rod mechanism. Therefore, when the tractor turns, the rotating connection component 1 can drive the locked telescopic mechanism 2 to drive the steering mechanism 210 to turn by rotating, thereby allowing the self-propelled vehicle to flexibly turn when being towed.

[0049] Further, in this embodiment, the telescopic mechanism 2 is a sleeve assembly, which includes a first sleeve 21 and a second sleeve 22. The first end of the first sleeve 21 is rotatably connected to the rotating connection assembly 1, the second end of the first sleeve 21 is mutually sleeved with the first end of the second sleeve 22, and the second end of the second sleeve 22 is rotatably connected to the steering mechanism 210 of the axle 200; the first sleeve 21 and the second sleeve 22 can move relative to each other along the axial direction of the sleeve, thereby realizing the telescopic action. In this embodiment, the second sleeve 22 is sleeved in the first sleeve 21. It can be understood that in other embodiments, the first sleeve 21 can also be sleeved in the second sleeve 22. In other embodiments, the telescopic mechanism 2 can also be a combination of a cylinder and a piston rod, or a combination of a slide groove and a guide rail, as long as the telescopic function described in this embodiment can be realized.

[0050] Furthermore, in order to facilitate locking the sleeve assembly, in this embodiment, a first locking hole 21a is provided on the first sleeve 21, a second locking hole 22a matching the first locking hole 21a is provided on the second sleeve 22, and the first locking member 3 is a first latch. When the first latch passes through the first locking hole 21a and the second locking hole 22a at the same time, the relative movement of the first sleeve 21 and the second sleeve 22 can be restricted. In other embodiments, the first locking member 3 can also be a locking buckle structure provided on the sleeve assembly, or any other locking method, as long as the telescopic mechanism 2 can be restricted from telescoping.

[0051] Furthermore, a first storage rack 4 is provided on the traction mechanism 100, and a first storage hole 4a is provided on the first storage rack 4. When the first latch is not needed, the first latch can be plugged into the first storage hole 4a to store the first latch and prevent it from being lost.

[0052] Furthermore, the rotating connection assembly 1 of the present embodiment includes a swing rod 11 and a traction connection rod 12, wherein the first end of the swing rod 11 is connected to the traction connection rod 12, and the second end of the swing rod 11 is rotatably connected to the first end of the telescopic mechanism 2. The traction connection rod 12 is mainly used to be connected to the tractor, and the swing rod 11 can facilitate the movement of the telescopic mechanism 2 during traction. Since the heights of the fixed ends used to fix the traction connection rod 12 on different tractors are different, the present embodiment rotatably connects the second end of the traction connection rod 12 to the first end of the swing rod 11, and the traction connection rod 12 can adjust the height of the first end of the traction connection rod 12 by rotating, thereby adapting to different tractors. In other embodiments, the second end of the traction connection rod 12 can also be fixedly connected to the first end of the swing rod 11.

[0053] Furthermore, the rotating connection assembly 1 of this embodiment also includes a second locking member 5, which can limit the rotation of the traction connection rod 12. That is, when the second locking member 5 is in an unlocked state, the traction connection rod 12 can rotate, and when the second locking member 5 is in a locked state, the traction connection rod 12 is locked and cannot rotate, thereby allowing the traction mechanism 100 to meet different usage needs.

[0054] Furthermore, the traction connecting rod 12 of the present embodiment is detachably arranged at the first end of the swing rod 11, and at least one first plug hole 12a is arranged on the traction connecting rod 12. The first end of the swing rod 11 is provided with a second plug hole 11a and a third plug hole 11b. The second plug hole 11a and the third plug hole 11b are arranged adjacent to each other, and the second plug hole 11a is located on the side of the third plug hole 11b away from the second end of the swing rod 11. The second locking member 5 is a second pin, and the rotating connection assembly 1 also includes a third pin 6, which cooperates with the second plug hole 11a, and the third plug pin 6 cooperates with the first plug hole 12a and the third plug hole 11b. When the third latch 6 passes through the first plug hole 12a and the third plug hole 11b at the same time, and the second latch is not inserted in the second plug hole 11a, the traction connecting rod 12 can rotate relative to the swing rod 11, thereby facilitating the adjustment of the height of the first end of the traction connecting rod 12. When the third latch 6 passes through the first plug hole 12a and the third plug hole 11b at the same time, and the second latch is inserted into the second plug hole 11a, the second latch can limit the rotation of the traction connecting rod 12.

[0055] Furthermore, the traction connecting rod 12 of this embodiment includes a first folding rod 121 and a second folding rod 122 , the second end of the first folding rod 121 is rotatably connected to the first end of the swing rod 11 , and the second folding rod 122 is detachably arranged on the first folding rod 121 .

[0056] Specifically, the rotating connection assembly 1 further includes a fourth latch 7 and a fifth latch 8, a plurality of fourth plug holes 121a are provided on the first folding rod 121, and a plurality of fifth plug holes 122a that match the fourth plug holes 121a are provided on the second folding rod 122. The fourth plug holes 121a and the fifth plug holes 122a are arranged at intervals along the axial direction of the first folding rod 121, thereby facilitating the adjustment of the height of the second folding rod 122. The fourth latch 7 can pass through one pair of aligned fourth plug holes 121a and fifth plug holes 122a as needed, so that the second folding rod 122 can rotate relative to the first folding rod 121, and after the fifth latch 8 is inserted into another pair of aligned fourth plug holes 121a and fifth plug holes 122a, the rotation of the second folding rod 122 can be restricted. By providing the first folding rod 121 and the second folding rod 122, the adjustment of the traction connecting rod 12 in the height direction can be made more flexible. It is understandable that the fourth plugging hole 121 a can have the same hole diameter as the first plugging hole 12 a , so that the fourth plugging hole 121 a can also cooperate with the third plugging hole 11 b to adjust the installation height of the first folding rod 121 .

[0057] Furthermore, a second storage rack 9 is provided on the traction mechanism 100, and a second storage hole 9a is provided on the second storage rack 9. When the fourth latch 7 or the fifth latch 8 is not needed, the fourth latch 7 or the fifth latch 8 can be inserted into the second storage hole 9a to facilitate the storage of the fourth latch 7 or the fifth latch 8 and prevent the fourth latch 7 or the fifth latch 8 from being lost.

[0058] Furthermore, in order to prevent the traction connecting rod 12 from breaking due to excessive force during the traction process, a buffer structure is also provided on the traction connecting rod 12 of this embodiment. Figure 4 As shown, the second folding rod 122 of this embodiment includes a rod head 1221, a buffer portion and a rod tail 1227 which are connected in sequence. The rod tail 1227 is detachably arranged on the first folding rod 121. The rod head 1221 can be compressed or returned relative to the rod tail 1227 through the buffer portion to buffer the up and down shaking of the traction mechanism caused by uneven roads, etc., to avoid damage to the traction mechanism.

[0059] Specifically, the buffer portion includes a guide shaft 1222, a limit nut 1223, a buffer seat 1224, a buffer member 1225 and a guide block 1226, the buffer seat 1224 has a first cavity 1224a and a first mounting hole 1224b penetrating the first cavity 1224a, the first cavity 1224a has an opening on a side away from the first mounting hole 1224b, the rod tail 1227 has a second cavity 1227a and a second mounting hole 1227b penetrating the second cavity 1227a, the second mounting hole 1227b is located at the first end of the rod tail 1227, and the first end of the rod tail 1227 is fixed to the buffer seat 1224 The first cavity 1224a and the second cavity 1227a are connected through the second mounting hole 1227b; the buffer 1225 has a third mounting hole 1225a, and the aperture of the third mounting hole 1225a is smaller than the aperture of the first mounting hole 1224b; the buffer 1225 is arranged in the first cavity 1224a of the buffer seat 1224, and the end surface of the buffer 1225 away from the first mounting hole 1224b abuts against the end surface of the first end of the rod tail 1227, the third mounting hole 1225a and the first mounting hole 1224b are connected, and the buffer 1225 can be extended and retracted along the axial direction of the second folding rod 122. The guide block 1226 is sleeved in the second mounting hole 1227b, and the guide block 1226 has a fourth mounting hole 1226a, which is connected to the first mounting hole 1224b and the third mounting hole 1225a, and the aperture of the fourth mounting hole 1226a is smaller than the aperture of the third mounting hole 1225a; a first step surface 1222a and a second step surface 1222b are formed on the guide shaft 1222, and the first step surface 1222a and the second step surface 1222b are both facing the second end of the guide shaft 1222, the first step surface 1222a is located on the side of the second step surface 1222b away from the second end of the guide shaft 1222, and the outer diameter of the first step surface 1222a is larger than the outer diameter of the second step surface 1222b, and the guide shaft 1222 is provided with a plurality of guide shafts 1224a, 1224b and 1224b. The first end of the guide shaft 1222 is connected to the rod head 1221, and the second end of the guide shaft 1222 passes through the first mounting hole 1224b, the third mounting hole 1225a and the fourth mounting hole 1226a at the same time and extends into the second cavity 1227a, the first step surface 1222a abuts against the end surface of the buffer member 1225 on the side close to the first mounting hole 1224b, and the second step surface 1222b abuts against the end surface of the guide block 1226 on the side close to the first mounting hole 1224b, the limiting nut 1223 is threadedly connected to the second end of the guide shaft 1222 and the outer diameter of the limiting nut 1223 is larger than the aperture of the fourth mounting hole 1226a, so as to lock the guide block 1226 between the second step surface 1222b and the limiting nut 1223.

[0060] The guide shaft 1222 can move along the axial direction of the second folding rod 122. When the rod head 1221 is compressed, the first step surface 1222a compresses the buffer 1225, and the second step surface 1222b pushes the guide block 1226 to slide downward in the fourth mounting hole 1226a, that is, the guide shaft 1222 drives the rod head 1221 to move downward; when the rod head 1221 is released from compression, the restoring force of the buffer 1225 abuts against the first step surface 1222a, so that the guide shaft 1222 drives the rod head 1221 to return. The buffer of this embodiment is a disc spring, which has good shock absorption performance and can increase the service life of the traction connecting rod 12.

[0061] Embodiment 2

[0062] A second embodiment of the present invention provides a self-propelled vehicle, such as Figure 5 and Figure 6 As shown, the self-propelled vehicle includes an axle 200 and a traction mechanism 100 provided in Example 1. The axle 200 includes a crossbeam 220 and a steering mechanism 210 installed on the crossbeam 220. The rotating connection assembly 1 is rotationally connected to the crossbeam 220, and the second end of the telescopic mechanism 2 is rotationally connected to the steering mechanism 210.

[0063] Furthermore, combined with Figure 1-2 As shown, the self-propelled vehicle further includes a mounting seat 300, which is disposed on the crossbeam 220. The rotating connection assembly 1 is rotatably connected to the crossbeam 220 through the mounting seat 300. The mounting seat 300 includes a limiting hole 300a, and one end of the rotating connection assembly 1 passes through the limiting hole 300a to be rotatably connected to the first end of the telescopic mechanism 2. The purpose of providing the mounting seat 300 is that, on the one hand, the mounting seat 300 can provide a rotation fulcrum for the rotating connection assembly 1, so that the rotating connection assembly 1 can drive the telescopic mechanism 2 to move. On the other hand, the limiting hole 300a on the mounting seat 300 can also limit the swing amplitude of the rotating connection assembly 1, so as to prevent the rotating connection assembly 1 from causing the second sleeve 22 to slip out of the first sleeve 21 due to excessive swing amplitude.

[0064] Furthermore, the axle 200 of this embodiment further includes a first steering knuckle 230 and a second steering knuckle 240 respectively arranged at both ends of the cross beam 220, and the steering mechanism 210 includes a first connecting rod 211, a second connecting rod 212, a switch valve (not shown) and a steering cylinder 213; the steering cylinder 213 is a double-acting double-piston rod cylinder, the cylinder barrel 2131 of the steering cylinder 213 is fixedly connected to the cross beam 220, and the two rod chambers of the steering cylinder 213 are connected through the switch valve. The two ends of the first connecting rod 211 are respectively connected to the first steering knuckle 230 and the first piston rod 2132 of the steering cylinder 213, and the two ends of the second connecting rod 212 are respectively connected to the second steering knuckle 24 and the second piston rod 2133 of the steering cylinder 213. The second end of the telescopic mechanism 2 is rotatably connected to the first connecting rod 211.

[0065] When the self-propelled vehicle needs to be towed, the self-power of the self-propelled vehicle is turned off, the switch valve of the steering cylinder 213 is opened, and the two rod chambers of the steering cylinder 213 are connected, and the steering mechanism 210 can realize the steering function under the drive of the telescopic mechanism 2. In other embodiments, the steering cylinder 213 may not be provided in the steering mechanism 210. For example, the steering mechanism 210 may be one or more connecting rods that can drive the first steering knuckle 230 and the second steering knuckle 240 to turn. The second end of the telescopic mechanism 2 is not limited to being rotatably connected to the first connecting rod 211. In other embodiments, the second end of the telescopic mechanism 2 may also be rotatably connected to the second connecting rod 212.

[0066] The self-propelled vehicle of this embodiment is a self-propelled aerial work equipment, specifically a self-propelled maintenance vehicle, which is mainly used for aircraft maintenance and upkeep, such as de-icing, cleaning and repairing aircraft. The self-propelled vehicle of this application can also be other equipment having the traction mechanism of embodiment 1, which is not limited here.

[0067] Each of the above embodiments provides a traction mechanism of a self-propelled vehicle and a self-propelled vehicle, respectively. By connecting the traction mechanism to the steering mechanism of the axle of the self-propelled vehicle, the telescopic mechanism is locked by the first locking member during the process of the self-propelled vehicle being towed and turned by the traction vehicle, and the self-propelled vehicle can be turned autonomously by using the traction mechanism to drive the steering mechanism without starting the self-power of the self-propelled vehicle, and the steering is more flexible and convenient. When the self-propelled vehicle is disconnected from the traction vehicle and moves autonomously, the restriction of the telescopic mechanism by the first locking member is released, and the self-propelled vehicle uses its own power to drive the steering mechanism to turn.

[0068] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A traction mechanism for a self-propelled vehicle, the self-propelled vehicle comprising an axle, characterized in that: The traction mechanism includes a rotating connection assembly, a telescopic mechanism and a first locking member; The rotating connection assembly is rotationally connected to the first end of the telescopic mechanism, and the second end of the telescopic mechanism is rotationally connected to the steering mechanism of the axle; The first locking member is used to lock the telescopic mechanism to limit the telescopic mechanism; The rotating connection assembly can drive the locked telescopic mechanism to drive the steering mechanism to turn by rotating; The rotating connection assembly includes a swing rod and a traction connecting rod; the first end of the swing rod is connected to the traction connecting rod, and the second end of the swing rod is rotatably connected to the first end of the telescopic mechanism; The steering mechanism is mounted on the crossbeam of the axle, and the rotation connection assembly is rotationally connected to the crossbeam; The traction connecting rod includes a buffer structure.

2. The traction mechanism according to claim 1, characterized in that: The telescopic mechanism is a sleeve assembly, which includes a first sleeve and a second sleeve; the first end of the first sleeve is rotatably connected to the rotating connection assembly, the second end of the first sleeve is mutually sleeved with the first end of the second sleeve, and the second end of the second sleeve is rotatably connected to the steering mechanism of the axle; the first sleeve and the second sleeve can move relative to each other along the axial direction of the sleeve.

3. The traction mechanism according to claim 2, characterized in that: The first sleeve is provided with a first locking hole, the second sleeve is provided with a second locking hole matching with the first locking hole, and the first locking member is a first latch; the first latch passes through the first locking hole and the second locking hole at the same time to limit the relative movement of the first sleeve and the second sleeve.

4. The traction mechanism according to claim 1, characterized in that: The second end of the traction connecting rod is rotatably connected to the first end of the swing rod; the traction connecting rod can be rotated to adjust the height of the first end of the traction connecting rod.

5. The traction mechanism according to claim 4, characterized in that: The rotating connection assembly further includes a second locking member, which can limit the rotation of the traction connecting rod.

6. The traction mechanism according to claim 5, characterized in that: The traction connecting rod is detachably arranged at the first end of the swing rod, the traction connecting rod is provided with at least one first plug hole, the first end of the swing rod is provided with a second plug hole and a third plug hole; the second plug hole and the third plug hole are arranged adjacent to each other and the second plug hole is located on a side of the third plug hole away from the second end of the swing rod; The second locking member is a second latch, and the rotating connection assembly further includes a third latch; the second latch cooperates with the second plug hole, and the third latch cooperates with the first plug hole and the third plug hole; The third latch passes through the first plug hole and the third plug hole at the same time, so that the traction connecting rod can rotate relative to the swing rod; the second latch is inserted into the second plug hole to limit the rotation of the traction connecting rod.

7. The traction mechanism according to claim 1, characterized in that: The traction connecting rod comprises a first folding rod and a second folding rod, wherein the second end of the first folding rod is rotatably connected to the first end of the swing rod; and the second folding rod is detachably arranged on the first folding rod.

8. The traction mechanism according to claim 7, characterized in that: The rotating connection assembly further includes a fourth latch and a fifth latch, the first folding rod is provided with a plurality of fourth plug holes, the plurality of the fourth plug holes are arranged at intervals along the axial direction of the first folding rod, the second folding rod is provided with a plurality of fifth plug holes matching the fourth plug holes, the fourth latch passes through one pair of aligned fourth plug holes and the fifth plug holes so that the second folding rod can rotate relative to the first folding rod, and the fifth latch is inserted into another pair of aligned fourth plug holes and the fifth plug holes to limit the rotation of the traction connecting rod; and / or, The second folding rod comprises a rod head, a buffer portion and a rod tail which are connected in sequence. The rod tail is detachably arranged on the first folding rod. The rod head can be compressed or returned relative to the rod tail through the buffer portion.

9. The traction mechanism according to claim 8, characterized in that: The buffer part includes a guide shaft, a limit nut, a buffer seat, a buffer member and a guide block; The buffer seat has a first cavity and a first mounting hole penetrating the first cavity, and the first cavity has an opening on a side away from the first mounting hole; The rod tail has a second cavity and a second mounting hole penetrating the second cavity, and the second mounting hole is located at the first end of the rod tail; The first end of the rod tail is fixedly connected to the buffer seat, and the first cavity and the second cavity are connected through the second mounting hole; The buffer member has a third mounting hole, and the diameter of the third mounting hole is smaller than the diameter of the first mounting hole; The buffer is arranged in the first cavity, the end surface of the buffer away from the first mounting hole abuts against the end surface of the first end of the rod tail, and the third mounting hole is connected to the first mounting hole; The guide block is sleeved in the second mounting hole, and the guide block has a fourth mounting hole, the fourth mounting hole is connected with the first mounting hole and the third mounting hole, and the aperture of the fourth mounting hole is smaller than the aperture of the third mounting hole; A first step surface and a second step surface are formed on the guide shaft, the first step surface and the second step surface both face the second end of the guide shaft, the first step surface is located on a side of the second step surface away from the second end of the guide shaft, and the outer diameter of the first step surface is greater than the outer diameter of the second step surface; The first end of the guide shaft is fixedly connected to the rod head, the second end of the guide shaft passes through the first mounting hole, the third mounting hole and the fourth mounting hole and extends into the second cavity, and the first step surface abuts against the end surface of the buffer member on the side close to the first mounting hole; The limiting nut is threadedly connected to the second end of the guide shaft, and the outer diameter of the limiting nut is larger than the aperture of the fourth mounting hole, so as to lock the guide block between the second step surface and the limiting nut.

10. A self-propelled vehicle, characterized in that: The self-propelled vehicle includes an axle and the traction mechanism described in any one of claims 1 to 7, the axle includes a crossbeam, a mounting seat arranged on the crossbeam and a steering mechanism installed on the crossbeam; the mounting seat includes a limiting hole, one end of the rotating connection assembly passes through the limiting hole and is rotatably connected to the first end of the telescopic mechanism, the rotating connection assembly is rotatably connected to the crossbeam through the mounting seat, and the second end of the telescopic mechanism is rotatably connected to the steering mechanism.

11. The self-propelled vehicle according to claim 10, characterized in that: The axle further comprises a first steering knuckle and a second steering knuckle respectively arranged at two ends of the cross beam, the steering mechanism comprises a first connecting rod, a second connecting rod, a switch valve and a steering cylinder, the steering cylinder is a double-acting double-piston rod cylinder, the cylinder barrel of the steering cylinder is fixedly connected to the cross beam, and the two rod chambers of the steering cylinder are connected through the switch valve; The two ends of the first connecting rod are respectively connected to the first steering knuckle and the first piston rod of the steering cylinder, the two ends of the second connecting rod are respectively connected to the second steering knuckle and the second piston rod of the steering cylinder, and the second end of the telescopic mechanism is rotatably connected to the first connecting rod or the second connecting rod.

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