Wheel set guiding device capable of automatically resetting and highway-railway dual-purpose tractor

Abstract

A wheel set guide device capable of resetting automatically comprises a first mounting seat, a guide wheel lifting device and a guide rotating device. The guide rotation device comprises a fixing support, a rotation bearing, a fixing plate, a guide wheel set and a reset assembly, the fixing support is installed on the guide wheel lifting device, the rotation bearing comprises an inner ring and an outer ring which can rotate relatively, one of the inner ring and the outer ring is connected with the fixing support, the other of the inner ring and the outer ring is connected with the fixing plate, and the guide wheel set is connected to the bottom of the fixing plate; a stop block is arranged at the bottom of the fixed bracket; and the reset assembly comprises a second mounting seat arranged on the top surface of the fixing plate and two elastic reset pieces, the reset pieces are connected to the second mounting seat, and the two elastic reset pieces abut against the two side faces, in the rotating direction of the slewing bearing, of the check block correspondingly. The invention further provides a highway-railway dual-purpose tractor using the wheel set guiding device. Compared with the prior art, the wheel set guiding device can automatically reset, the rail climbing and derailing risks are reduced, and the driving safety is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wheel set guiding devices, and particularly relates to a wheel set guiding device capable of automatic reset and a rail-road dual-purpose tractor using the device. Background Art

[0002] In order to meet the requirements of railway driving, rail-road dual-purpose tractors are generally provided with guiding devices at the front and rear of the vehicle. However, traditional guiding devices usually only include a pair of guiding wheels, and a steel shaft is connected between the guiding wheels. This kind of guiding device can meet the requirements of load bearing and guiding. However, when the vehicle turns, it can only maintain guiding by squeezing the conical wheel rim of the guiding steel wheel against the track, which easily causes the front and rear of the body of the rail-road dual-purpose tractor to be misaligned and skewed with the track, resulting in the phenomenon of the guiding wheel climbing the track, further leading to guiding failures such as derailment, and affecting the safety of personnel and equipment.

[0003] Chinese Patent No. 202220281658.4 discloses a double-wheel guiding mechanism and a rail-road dual-purpose tractor thereof. It mainly improves the structural strength and increases the steering load-bearing capacity by providing two pairs of guiding steel wheels connected by two connecting shaft parts. However, it still cannot effectively reduce the derailment risk of the guiding device when turning. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a wheel set guiding device capable of automatic reset.

[0005] To achieve the above purpose, the present invention discloses a wheel set guiding device capable of automatic reset, which includes a first mounting seat, a guiding wheel lifting device provided on the first mounting seat, and a guiding rotary device provided at the bottom of the guiding wheel lifting device. The first mounting seat is provided behind the chassis of the tractor.

[0006] The guiding rotary device includes a fixed bracket, a slewing bearing, a fixing plate, a guiding wheel set and a reset assembly. The fixed bracket is installed on the guiding wheel lifting device. The slewing bearing includes an inner ring and an outer ring that can rotate relative to each other. One of the inner ring and the outer ring is connected to the fixed bracket, and the other of the inner ring and the outer ring is connected to the fixing plate. The guiding wheel set is connected to the bottom of the fixing plate.

[0007] A stop block is provided at the bottom of the fixed bracket.

[0008] The reset assembly includes a second mounting seat and an elastic reset member. The second mounting seat is provided on the top surface of the fixing plate. The reset member is connected to the second mounting seat. There are two elastic reset members, and the two elastic reset members respectively press against two sides of the stop block along the rotation direction of the slewing bearing.

[0009] In one embodiment, there are two sets of the guide wheel groups, and the guide rotary device is rotatably connected to the guide wheel lifting device.

[0010] In another embodiment, the guide wheel lifting device includes a lifting adjustment mechanism and a flipping adjustment mechanism. One end of the lifting adjustment mechanism is connected to the first mounting seat, and the other end of the lifting adjustment mechanism is hinged to the fixed bracket through a first rotating shaft. The flipping adjustment mechanism is installed on the lifting adjustment mechanism, and the output end of the flipping adjustment mechanism is connected to the fixed bracket for driving the fixed bracket to rotate along the first rotating shaft.

[0011] In another embodiment, the flipping adjustment mechanism includes a first telescopic cylinder and an adjustment block. The first telescopic cylinder is installed on the lifting adjustment mechanism. The middle position of the adjustment block is hinged to the first rotating shaft. An end of the top surface of the adjustment block is provided with a first hinge seat. The pull rod of the first telescopic cylinder is hinged to the first hinge seat. Both ends of the bottom surface of the adjustment block are pressing surfaces in contact with the fixed bracket.

[0012] In another embodiment, there are two sets of the flipping adjustment mechanisms. Two first telescopic rods are respectively located on both sides of the lifting adjustment mechanism, and two adjustment blocks are respectively hinged to both ends of the first rotating shaft.

[0013] In another embodiment, it further includes a third mounting seat, and the third mounting seat is arranged on the chassis girder;

[0014] The lifting adjustment mechanism includes a second telescopic cylinder, a swing arm, a rotating block and a spring;

[0015] The second telescopic cylinder is connected to the first mounting seat, and a limiting portion is provided at the extending end of the pull rod of the second telescopic cylinder;

[0016] The swing arm includes two connecting arms arranged in parallel and a connecting plate connecting the two connecting arms. Both ends of the two connecting arms are respectively hinged to the third mounting seat and the fixed bracket. The connecting plate is in a "well" shape, and there is an installation cavity at the middle position of the connecting plate. The rotating block is hinged to the installation cavity through a second rotating shaft. Both sides of the rotating block are in limit fit with the installation cavity. The pull rod of the second telescopic cylinder is hinged to the rotating block and the pull rod is perpendicular to the second rotating shaft;

[0017] The spring is sleeved on the pull cylinder of the second telescopic cylinder, and both ends of the spring are in limit fit with the limiting portion and the rotating block respectively.

[0018] In another embodiment, a limiting groove is provided on the rotating block, and the end of the spring is clamped in the limiting groove.

[0019] In another embodiment, a second hinge seat extends outwardly from the outer side of the connecting arm, and the flipping and adjusting mechanism is hinged to the second hinge seat.

[0020] In another embodiment, there are two stoppers, which are symmetrically arranged at the bottom of the fixed bracket, and there are two sets of reset components, and one set of reset components cooperates with one stopper.

[0021] The present invention also provides a rail-road dual-purpose tractor using the above-mentioned automatically resetable wheel set guiding device.

[0022] A rail-road dual-purpose tractor includes a tractor main body and a wheel set guiding device, and the wheel set guiding device is the automatically resetable wheel set guiding device described in any one of the above.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] When the vehicle turns from a straight road to a curved road, the conical wheel rim of the guiding wheel set is squeezed by the track, so that the guiding wheel set rotates around the center of the slewing bearing, and the guiding wheel set can be guided along the direction of the curved road, significantly alleviating the problems of climbing the track and derailing of the guiding wheel set caused by the skewing and misalignment of the vehicle after entering the curved road. During the rotation of the guiding wheel set, the elastic resetting member is compressed under the limiting action of the stopper. When the vehicle travels on the track and turns from a curved road to a straight road, the extrusion between the guiding wheel and the track gradually weakens until it disappears. At this time, the elastic resetting member releases the compression amount, so that the guiding wheel set rotates and resets around the center of the slewing bearing.

[0025] By setting the guiding wheel set to a rotatable state and arranging a reset component to cooperate with the guiding wheel set, the guiding wheel set can make adaptive rotation adjustment and automatic reset during the driving process on the curved road and the straight road, reducing the risks of climbing the track and derailing, and improving the driving safety.

[0026] The combined design of the slewing bearing and the elastic resetting component enables the vehicle to be automatically corrected by making full use of the conical surface of the guiding wheel set and its own slewing function when the vehicle deviates due to the lateral deviation of the track or the wear of the wheel-rail, without having to re-debug the entire device, which is more convenient to use. It also enables the guiding wheel set to convert its rigid contact with the track into a combined action of rolling friction and elastic deformation. The guiding wheel set has a certain buffering effect, reducing the wear of the guiding wheel set and improving the service life of the guiding wheel set. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the front view of the automatically resetable wheel set guiding device of Embodiment 1;

[0028] Figure 2 For Figure 1 It is the three-dimensional structure schematic diagram of the automatically resetable wheel set guiding device in

[0029] Figure 3 For Figure 1 The three-dimensional structure schematic diagram of another perspective of the wheel set guiding device with automatic reset in

[0030] Figure 4 For Figure 1 The top view of the guiding and rotating device (excluding the fixed bracket) in

[0031] Figure 5 For Figure 1 The three-dimensional structure schematic diagram of the fixed bracket in

[0032] Figure 6 For Figure 1 The three-dimensional structure schematic diagram of the swing arm in

[0033] The first mounting seat 100; the vertical plate 110; the side plate 120; the cross beam 130; the cylinder mounting seat 140; the spare tire mounting rack 150;

[0034] The lifting and adjusting mechanism 200; the second telescopic cylinder 210; the swing arm 220; the connecting arm 221; the connecting plate 222; the mounting cavity 223; the second hinge seat 224; the rotating block 230; the limiting groove 240; the spring 250;

[0035] The flipping and adjusting mechanism 300; the first telescopic cylinder 310; the adjusting block 320;

[0036] The guiding and rotating device 400; the fixed bracket 410; the stop block 411; the slewing bearing 420; the fixing plate 430; the guiding wheel set 440; the wheel axle 441; the guiding wheel 442; the reset assembly 450; the second mounting seat 451; the elastic reset member 452;

[0037] The third mounting seat 500; the main beam fixing seat 510; the vehicle frame fixing seat 520; the swing arm mounting seat 530; the strengthening cross beam 540. Specific embodiments

[0038] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Embodiment 1

[0040] An automatically resetable wheel set guiding device, see Figure 1 , including the first mounting seat 100, the guiding wheel lifting device provided on the first mounting seat 100, and the guiding and rotating device 400 provided at the bottom of the guiding wheel lifting device.

[0041] See Figures 2-4, the guiding and slewing device 400 includes a fixed bracket 410, a slewing bearing 420, a fixing plate 430, a guiding wheel set 440 and a reset assembly 450. The fixed bracket 410 is installed on the guiding wheel lifting device; the slewing bearing 420 includes an inner ring and an outer ring that can rotate relative to each other, one of the inner ring and the outer ring is connected to the fixed bracket 410, and the other of the inner ring and the outer ring is connected to the fixing plate 430. In this embodiment, the inner ring and the outer ring are respectively connected to the fixed bracket 410 and the fixing plate 430; the guiding wheel set 440 is connected to the bottom of the fixing plate 430. When the vehicle turns from a straight road to a curved road, the conical rim of the guiding wheel set 440 is squeezed by the track, causing the guiding wheel set 440 to rotate around the center of the slewing bearing 420. The guiding wheel set 440 can guide along the direction of the curved road, significantly alleviating the problems of the guiding wheel set 440 climbing the track and derailing caused by the vehicle skewing and misaligning after entering the curved road.

[0042] See Figure 2 , Figure 5 , a stop block 411 is provided at the bottom of the fixed bracket 410. The reset assembly 450 includes a second mounting seat 451 and an elastic reset member 452. The second mounting seat 451 is provided on the top surface of the fixing plate 430, and the reset member is connected to the second mounting seat 451. There are two elastic reset members 452, and the two elastic reset members 452 respectively press against two sides of the stop block 411 along the rotation direction of the slewing bearing 420. During the rotation of the guiding wheel set 440, the elastic reset member 452 is compressed under the limiting action of the stop block 411. When the vehicle travels on the track and turns from a curved road to a straight road, the extrusion between the guiding wheel and the track gradually weakens until it disappears. At this time, the elastic reset member 452 releases the compression amount, causing the guiding wheel set 440 to rotate and reset around the center of the slewing bearing 420.

[0043] For the wheel set guiding device with automatic reset in this embodiment, the guiding wheel set 440 is set to a rotatable state and has a reset function through the reset assembly 450, and has the following advantages:

[0044] First, the guiding wheel set 440 can rotate and automatically reset, enabling the guiding wheel set 440 to make adaptive rotation adjustment and automatic reset during the driving process on curved roads and straight roads, reducing the risks of climbing the track and derailing, and improving driving safety.

[0045] Second, the combined design of the slewing bearing 420 and the elastic reset assembly 450 enables automatic correction by making full use of the conical surface of the guiding wheel set 440 and its own slewing function when the vehicle is offset due to lateral deviation of the track or wheel-rail wear, without having to re-debug the entire device, making it more convenient to use; it also enables the guiding wheel set 440 to convert its rigid contact with the track into a combined action of rolling friction and elastic deformation. The guiding wheel set 440 has a certain buffering effect, reducing the wear of the guiding wheel set 440 and improving the service life of the guiding wheel set 440.

[0046] Among them, there are two stoppers 411, which are symmetrically arranged at the bottom of the fixed bracket 410. There are two sets of reset components 450, and one set of reset components 450 cooperates with one stopper 411. Through the two stoppers 411 and at the same time through the two sets of reset components 450, the reset is realized. When the guide wheel set 440 deflects left / right, it triggers the compression of different reset parts respectively, which can improve the later reset response speed.

[0047] In this embodiment, referring to Figure 4 , the guide wheel set 440 includes a wheel axle 441 and guide wheels 442 respectively installed at both ends of the wheel axle 441. There are two sets of guide wheel sets 440, and the two sets of guide wheels are welded to the bottom of the fixed plate 430. The double guide wheel set 440 is provided to improve the load-bearing capacity. The guide slewing device 400 is rotatably connected to the guide wheel lifting device. In actual use, when the tractor is on the track, through the linkage of lifting and flipping, all the guide wheels of the guide wheel set 440 can effectively contact the track surface, ensuring that the pressure on the track reaches the expected value and is balanced, avoiding problems such as reduced guiding performance due to insufficient load-bearing capacity, which increases the derailment risk, or the wheel set is easily damaged due to overload and the load-bearing of the driving wheels is reduced, thereby reducing the traction performance. When the tractor is off the track, through the linkage of lifting and flipping, the guide wheel set 440 is retracted to the initial position. At this position, the ground clearance of the guide wheel set 440 is the largest, and the included angle with the ground horizontal direction is the largest, ensuring the passing performance of the vehicle during highway driving.

[0048] Specifically, referring to Figure 2 , the guide wheel lifting device includes a lifting adjustment mechanism 200 and a flipping adjustment mechanism 300. One end of the lifting adjustment mechanism 200 is connected to the first mounting seat 100, and the other end of the lifting adjustment mechanism 200 is hinged to the fixed bracket 410 through a first rotating shaft. The flipping adjustment mechanism 300 is hinged to the lifting adjustment mechanism 200, and the output end of the flipping adjustment mechanism 300 is hinged to the fixed bracket 410 for driving the fixed bracket 410 to rotate along the first rotating shaft. When the guide wheel set 440 needs to be guided, the lifting adjustment mechanism 200 drives the fixed bracket 410 downward, so that the entire guide slewing device 400 rotates and opens until the guide wheel set 440 contacts the track. During the process of the guide wheel set 440 contacting the track, the flipping adjustment mechanism 300 drives the fixed bracket 410 to rotate, so that all the guide wheels of the guide wheel set 440 can contact the track, and each guide wheel can evenly bear the load.

[0049] More specifically, referring to Figure 2, the flipping adjustment mechanism 300 includes a first telescopic cylinder 310 and an adjustment block 320. The first telescopic cylinder 310 is hinged to the lifting adjustment mechanism 200. The middle position of the adjustment block 320 is hinged to the first rotating shaft. An end of the top surface of the adjustment block 320 is provided with a first hinge seat, and a pull rod of the first telescopic cylinder 310 is hinged to the first hinge seat. Both ends of the bottom surface of the adjustment block 320 are pressing surfaces that contact the fixed bracket 410. By driving the adjustment block 320 to rotate through the pull rod of the first telescopic cylinder 310, the guiding and rotating device 400 is driven to flip, and finally the adjustment between the guide wheel set 440 and the track is realized.

[0050] Among them, there are two sets of flipping adjustment mechanisms 300. The two first telescopic rods are respectively located on both sides of the lifting adjustment mechanism 200, and the two adjustment blocks 320 are respectively hinged to both ends of the first rotating shaft.

[0051] In this embodiment, referring to Figure 2 , the first mounting seat 100 includes a vertical plate 110, a side plate 120, a cross beam 130, a cylinder mounting support 140, and a spare tire mounting bracket 150. The vertical plate 110 is welded to the side plate 120 and the cross beam 130. The welded overall structure is installed at the last cross beam 130 of the chassis. The two side plates 120 are bolted to the chassis girder, and the vertical plate 110 is bolted to the chassis cross beam 130. The cross beam 130 passes through the side plate 120 and is welded above the vertical plate 110. A cylinder mounting support 140 is welded in the middle of the cross beam 130, and at the same time, a triangular reinforcing plate is welded. Spare tire mounting brackets 150 are welded on both sides of the oil cylinder mounting support on the cross beam 130.

[0052] Referring to Figures 1-2 , the wheel set guiding device further includes a third mounting seat 500. The third mounting seat 500 includes a girder fixing seat 510, a frame fixing seat 520, a swing arm mounting seat 530, and a reinforcing cross beam 540. The girder fixing seat 510 and the frame fixing seat 520 are bolted up and down, and the side is bolted to the fixing seat of the swing arm 220. At the same time, the girder fixing seat 510 is installed inside the chassis girder, and the frame fixing seat 520 is installed inside the sub-frame above the girder. The reinforcing cross beam 540 bolts the fixing seats on the left and right sides, so that the third mounting seat 500 forms an integral body.

[0053] Referring to Figure 2 、 Figures 4-5, the lifting and adjusting mechanism 200 includes a second telescopic cylinder 210, a swing arm 220, a rotating block 230 and a spring 250. Among them, the second telescopic cylinder 210 is hinged to the cylinder mounting support 140 of the first mounting seat 100, and a limiting portion is provided at the extending end of the pull rod of the second telescopic cylinder 210; the swing arm 220 includes two connecting arms 221 arranged in parallel and a connecting plate 222 connecting the two connecting arms 221 together. The two ends of the two connecting arms 221 are respectively hinged to the third mounting seat 500 and the fixed bracket 410. The connecting plate 222 is in a "well" shape, and an installation cavity 223 is provided at the middle position of the connecting plate 222. The rotating block 230 is hinged in the installation cavity 223 through a second rotating shaft. The two sides of the rotating block 230 are in limiting cooperation with the installation cavity 223. The pull rod of the second telescopic cylinder 210 is hinged to the rotating block 230 and the pull rod is perpendicular to the second rotating shaft. The spring 250 is sleeved on the pull cylinder of the second telescopic cylinder 210, and the two ends of the spring 250 are in limiting cooperation with the limiting portion and the rotating block 230 respectively. When it is necessary to lower the guiding and slewing device 400, the pull rod of the second telescopic cylinder 210 extends, and the pull rod pushes the swing arm 220 to turn downward, so as to place the guide wheel set 440 of the guiding and slewing device 400 on the guide rail; similarly, when it is necessary to retract, the pull rod of the second telescopic cylinder 210 retracts, so as to retract the guiding and slewing device 400. Among them, by setting the spring 250, the spring 250 provides a certain pre-tightening force. When the vehicle travels on a bumpy road section and causes an upward derailment trend as a whole, when the rail pressure of the guide wheel set 440 decreases, the spring 250 releases the compression amount to push the swing arm 220 downward, maintaining the stability of the rail pressure of the guiding device. At the same time, the guide wheel set 440 automatically resets, reducing the risk of derailment. The connecting plate 222 is specifically set as a "well" - shaped structure to form the installation cavity 223. The two sides of the rotating block 230 are in limiting cooperation with the inner side wall of the installation cavity 223. This does not mean that the two are in contact, but there is a certain gap. In this way, it can not only ensure the smooth rotation of the rotating block 230, but also make the overall structure compact. The "well" - shaped connecting plate 222 connects the two connecting arms 221, improving the structural strength and rigidity of the entire swing arm 220, enhancing the load - bearing capacity and service life of the swing arm 220, and at the same time having the characteristics of light weight, reducing the weight of the swing arm 220. And the rotating block 230 is hinged in the installation cavity 223 through the second rotating shaft so that its pull rod is perpendicular to the second rotating shaft. During the whole process of lowering or retracting the guiding and slewing device 400, the mechanical efficiency of the pushing and pulling force of the second telescopic cylinder 210 is the largest, which can output a larger torque and reduce the requirements for the second telescopic cylinder 210.

[0054] Among them, see Figures 5-6, a cross-shaped channel is provided inside the rotating block 230. The pull rod of the second telescopic cylinder 210 penetrates into one of the channels, and the other channel is for the pin shaft to pass through, so that the pin shaft passes through the rotating block 230 and the pull rod of the second telescopic cylinder 210 and is finally connected to the rotating connecting plate 222. A limiting groove 240 is provided on the rotating block 230, and the end of the spring 250 is clamped in the limiting groove 240. In this way, the spring 250 can cooperate reliably with the rotating block 230 to prevent the spring 250 from disengaging from the limiting groove 240.

[0055] Among them, referring to Figure 5 , second hinge seats 224 extend outward from the outer sides of both connecting arms 221, and one second telescopic cylinder 210 is hinged to one second hinge seat 224.

[0056] Embodiment 2

[0057] A rail-road dual-purpose tractor includes a tractor main body and a wheel set guiding device. In this embodiment, the wheel set guiding device is the automatically resetable wheel set guiding device of Embodiment 1.

[0058] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A wheel guide device capable of automatically resetting, characterized in that: It comprises a first mounting seat, a guide wheel lifting device arranged on the first mounting seat, and a guide rotating device arranged at the bottom of the guide wheel lifting device, wherein the first mounting seat is arranged at the rear of the chassis of the tractor; The guide slewing device comprises a fixed bracket, a slewing bearing, a fixed plate, a guide wheel group and a reset assembly, wherein the fixed bracket is mounted on the guide wheel lifting device, the slewing bearing comprises an inner ring and an outer ring which can rotate relatively, one of the inner ring and the outer ring is connected to the fixed bracket, the other of the inner ring and the outer ring is connected to the fixed plate, and the guide wheel group is connected to the bottom of the fixed plate; A stopper is provided at the bottom of the fixing bracket; The reset assembly includes a second mounting seat and an elastic reset member, the second mounting seat is arranged on the top surface of the fixed plate, the reset member is connected to the second mounting seat, there are two elastic reset members, and the two elastic reset members respectively press against the two side surfaces of the stopper along the rotation direction of the slewing bearing.

2. The wheel guide device capable of automatically resetting according to claim 1, characterized in that: There are two guide wheel groups, and the guide rotating device is rotatably connected to the guide wheel lifting device.

3. The wheel guide device capable of automatically resetting according to claim 2, characterized in that: The guide wheel lifting device includes a lifting adjustment mechanism and a flipping adjustment mechanism, one end of the lifting adjustment mechanism is connected to the first mounting seat, the other end of the lifting adjustment mechanism is hinged to the fixed bracket through the first rotating shaft, the flipping adjustment mechanism is installed on the lifting adjustment mechanism, and the output end of the flipping adjustment mechanism is connected to the fixed bracket for driving the fixed bracket to rotate along the first rotating shaft.

4. The wheel guide device capable of automatically resetting according to claim 3, characterized in that: The flip adjustment mechanism includes a first telescopic cylinder and an adjustment block. The first telescopic cylinder is installed on the lifting adjustment mechanism. The middle position of the adjustment block is hinged to the first rotating shaft. The end of the top surface of the adjustment block is provided with a first hinge seat. The pull rod of the first telescopic cylinder is hinged to the first hinge seat. The two ends of the bottom surface of the adjustment block are downward pressure surfaces in contact with the fixed bracket.

5. The wheel guide device capable of automatically resetting according to claim 4, characterized in that: The flip adjustment mechanism has two groups, two first telescopic rods are respectively located on both sides of the lifting adjustment mechanism, and two adjustment blocks are respectively hinged to the two ends of the first rotating shaft.

6. The wheel guide device capable of automatically resetting according to claim 3, characterized in that: It also includes a third mounting seat, wherein the third mounting seat is arranged on the chassis beam; The lifting and lowering adjustment mechanism comprises a second telescopic cylinder, a swing arm, a rotating block and a spring; The second telescopic cylinder is connected to the first mounting seat, and a limit portion is provided at the extended end of the pull rod of the second telescopic cylinder; The swing arm includes two connecting arms arranged in parallel and a connecting plate connecting the two connecting arms together, the two ends of the two connecting arms are respectively hinged to the third mounting seat and the fixed bracket, the connecting plate is in a "well" shape, and a mounting cavity is provided in the middle of the connecting plate, the rotating block is hinged in the mounting cavity through a second rotating shaft, the two sides of the rotating block are limitedly matched with the mounting cavity, the pull rod of the second telescopic cylinder is hinged to the rotating block and the pull rod is perpendicular to the second rotating shaft; The spring is sleeved on the pulling cylinder of the second telescopic cylinder, and the two ends of the spring are respectively matched with the limiting part and the rotating block.

7. The wheel guide device capable of automatically resetting according to claim 6, characterized in that: The rotating block is provided with a limiting groove, and the end of the spring is clamped in the limiting groove.

8. The wheel guide device capable of automatically resetting according to claim 6, characterized in that: A second hinge seat is extended outwardly from the outer side of the connecting arm, and the flip adjustment mechanism is hinged to the second hinge seat.

9. The wheel guide device capable of automatically resetting according to claim 1, characterized in that: There are two stoppers, which are symmetrically arranged at the bottom of the fixed bracket. There are two groups of reset components, one group of reset components cooperates with one stopper.

10. A road-rail dual-purpose tractor, comprising a tractor body and a wheel guide device, characterized in that: The wheel set guiding device is an automatically resettable wheel set guiding device as described in any one of claims 1-9.

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