Rotatable lifting wheel set guide device and highway-railway dual-purpose tractor

Abstract

A rotatable lifting wheel set guide device comprises a first mounting seat, a guide wheel lifting device, a guide wheel device and a second mounting seat, and the first mounting seat and the second mounting seat are arranged on a tractor chassis; the guide wheel lifting device comprises a first telescopic cylinder, a swing arm and a spring; one end of the swing arm is hinged to the second mounting seat, and the other end of the swing arm is connected with the guide wheel device; the first telescopic cylinder is connected to the first mounting base, a pull rod of the first telescopic cylinder is hinged to the swing arm, and a limiting part is arranged at the pull rod extending end of the first telescopic cylinder; the spring sleeves the pull rod of the first telescopic cylinder, and the two ends of the spring are matched with the limiting part and the swing arm in an abutting mode respectively. The utility model further provides a highway-railway dual-purpose tractor using the wheel set guiding device. Compared with the prior art, the wheel set guiding device has the advantages that the first driving cylinder and the swing arm form a lever structure, under the same load condition, driving power is reduced, energy consumption is reduced, meanwhile, rigid impact is reduced through the swing arm, and the service life of the first telescopic cylinder is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wheel set guiding device, concretely relates to a rotatable lifting wheel set guiding device and a public and railway dual-purpose tractor using the wheel set guiding device. BACKGROUND

[0002] The public and railway dual-purpose tractor is a special vehicle that can switch between driving on the road and driving on the railway track, and the guiding wheel mechanism is a core component for ensuring the stability of track driving. When the tractor needs to switch the road conditions for driving, the guiding wheel needs to be lifted or lowered by a lifting driving mechanism.

[0003] The utility model patent with the authorization announcement number CN217320363U discloses a double-guiding-wheel guiding mechanism, which directly drives the lifting of the connecting shaft part by using an electric push rod, so that the guiding wheel set contacts or separates from the track. In this scheme, the electric push rod is directly connected with the guiding wheel set as a power unit. When the electric push rod needs to drive the lifting of the guiding wheel set under the conditions of frequent start and stop and high load, the driving power demand is high, especially in large-tonnage vehicles, the continuous high-current operation of the electric push rod will increase the power consumption; in addition, when the vehicle drives to the bumpy road section, the vertical impact load borne by the guiding wheel set will be directly transmitted to the internal transmission components of the electric push rod, and the internal components of the electric push rod are prone to wear and even breakage, so the reliability and service life of the equipment are greatly reduced. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the defects in the prior art and provides a rotatable lifting wheel set guiding device.

[0005] To achieve the above purpose, the utility model discloses a rotatable lifting wheel set guiding device, which comprises a first mounting seat, a guiding wheel lifting device arranged on the first mounting seat, a guiding wheel device arranged at the bottom of the guiding wheel lifting device, and a second mounting seat, wherein the first mounting seat is arranged at the rear of the chassis of the tractor, and the second mounting seat is arranged on the chassis girder.

[0006] The guiding wheel lifting device comprises a first telescopic cylinder, a swing arm, and a spring.

[0007] One end of the swing arm is hinged to the second mounting seat, and the other end of the swing arm is connected to the guiding wheel device.

[0008] The first telescopic cylinder is connected to the first mounting seat, the pull rod of the first telescopic cylinder is hinged to the swing arm, and is used for driving the swing arm to rotate and lift or rotate and lower, and the pull rod of the first telescopic cylinder is provided with a limiting part at the extending end.

[0009] The spring is sleeved on the pull rod of the first telescopic cylinder, and the two ends of the spring are respectively abutted against the limiting part and the swing arm.

[0010] In one embodiment, the swing arm includes two parallel connecting arms, a connecting plate connecting the two connecting arms together, and a rotating block. The two ends of the two connecting arms are respectively hinged to the second mounting base and the guide wheel device. The connecting plate is in the shape of a "well" and has a mounting cavity in the middle. The rotating block is hinged to the mounting cavity through a second rotating shaft. The pull rod of the first telescopic cylinder is hinged to the rotating block and the pull rod is perpendicular to the second rotating shaft.

[0011] In another embodiment, the two sides of the rotating block are limited to the inner wall of the mounting cavity.

[0012] In another embodiment, the rotating block is provided with a limiting groove, and the end of the spring is engaged in the limiting groove.

[0013] In another embodiment, the other end of the swing arm is hinged to the guide wheel device via a first pivot.

[0014] It also includes a flipping adjustment mechanism, which includes a second telescopic cylinder and an adjustment block. The second telescopic cylinder is hinged to the swing arm, and the middle position of the adjustment block is hinged to the first rotating shaft. The top end of the adjustment block is provided with a first hinge seat, and the pull rod of the second telescopic cylinder is hinged to the first hinge seat. The two ends of the bottom surface of the adjustment block are downward pressing surfaces that contact the guide wheel device.

[0015] In another embodiment, the flipping adjustment mechanism has two sets, with two second telescopic rods located on both sides of the swing arm, and two adjustment blocks hinged to both ends of the first rotating shaft.

[0016] In another embodiment, a second hinge seat for mounting the second telescopic cylinder is provided on each side of the swing arm.

[0017] In another embodiment, the lever of the first telescopic cylinder is hinged to the middle position of the swing arm.

[0018] This utility model also provides a road-rail tractor using the above-mentioned wheel set guiding device.

[0019] A dual-purpose road-rail tractor includes a tractor body and a wheel guide device, wherein the wheel guide device is any of the rotatable and liftable wheel guide devices described above.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] The first telescopic cylinder drives the swing arm to rotate and lift. The first drive cylinder and the swing arm form a lever structure, which reduces the driving power and energy consumption under the same load.

[0022] The swing arm is connected with the guide wheel device, which can avoid rigid impact directly acting on the internal transmission components of the first telescopic cylinder, reduce the wear of the internal structure of the first telescopic cylinder, and prolong the service life of the first telescopic cylinder, compared with the direct connection of the guide wheel device with the first telescopic cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A front view of the rotatable and liftable wheel set guide device of embodiment 1 is shown in the figure.

[0024] Figure 2 A perspective structural schematic view of the rotatable and liftable wheel set guide device of Figure 1

[0025] Figure 3 A perspective structural schematic view of the swing arm in Figure 1

[0026] First mounting seat 100; vertical plate 110; side plate 120; cross beam 130; cylinder body mounting support 140; spare tire mounting rack 150;

[0027] Guide wheel lifting device 200; first telescopic cylinder 210; swing arm 220; connecting arm 221; connecting plate 222; mounting cavity 223; rotating block 230; limiting groove 231; second hinge seat 240; spring 250;

[0028] Turnover adjusting mechanism 300; second telescopic cylinder 310; adjusting block 320; first hinge seat 330;

[0029] Guide wheel device 400;

[0030] Second mounting seat 500; girder fixing seat 510, vehicle frame fixing seat 520, swing arm mounting seat 530 and reinforcing cross beam 540. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, characteristics and advantages of the utility model more obvious and easy to understand, the utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0032] Embodiment 1

[0033] A rotatable and liftable wheel set guide device, referring to Figure 1 , comprising a first mounting seat 100, a guide wheel lifting device 200 arranged on the first mounting seat 100, a guide wheel device 400 arranged at the bottom of the guide wheel lifting device 200 and a second mounting seat 500.

[0034] Among them, the guide wheel device 400 can adopt the existing guide wheel, and the specific structure is not described here.

[0035] Among them, referring to​​Figures 2-3 The first mounting base 100 comprises a vertical plate 110, a side plate 120, a cross beam 130, a cylinder mounting support 140, and a spare tire mounting rack 150. The vertical plate 110 is welded with the side plate 120 and the cross beam 130, and the whole structure after welding is mounted at the last cross beam 130 of the chassis. The two side plates 120 are bolted with the chassis girder, and the vertical plate 110 is bolted with the chassis cross beam 130. The cross beam 130 is welded above the vertical plate 110 through the side plate 120, and the cylinder mounting support 140 is welded in the middle of the cross beam 130, with a triangular reinforcing plate welded at the same time. The spare tire mounting rack 150 is welded on the cross beam 130 on both sides of the cylinder mounting support. The second mounting base 500 comprises a girder fixing seat 510, a frame fixing seat 520, an oscillating arm 220 mounting seat 530, and a reinforcing cross beam 540. The girder fixing seat 510 is bolted with the frame fixing seat 520 up and down, and bolted with the oscillating arm 220 mounting seat on the side. Meanwhile, the girder fixing seat 510 is mounted on the inner side of the chassis girder, and the frame fixing seat 520 is mounted on the inner side of the sub-frame above the girder. The reinforcing cross beam 540 is bolted with the fixing seats on the left and right sides, so that the second mounting base 500 forms a whole.

[0036] Referring to Figure 2 The guide wheel lifting device 200 comprises a first telescopic cylinder 210, an oscillating arm 220, and a spring 250. One end of the oscillating arm 220 is hinged with the second mounting base 500, and the other end of the oscillating arm 220 is connected with the guide wheel device 400. The first telescopic cylinder 210 is connected with the first mounting base 100, and the pull rod of the first telescopic cylinder 210 is hinged with the oscillating arm 220, specifically at the middle position of the oscillating arm 220, for driving the oscillating arm 220 to rotate and lift up and rotate and put down. The extension end of the pull rod of the first telescopic cylinder 210 is provided with a limiting part. The spring 250 is sleeved on the pull rod of the first telescopic cylinder 210, and the two ends of the spring 250 are respectively in abutting contact with the limiting part and the oscillating arm 220. When the tractor is on the track, the pull rod of the first telescopic cylinder 210 is extended, so that the oscillating arm 220 is rotated downward until all the guide wheels of the guide wheel device 400 are in contact with the track, so as to ensure that the track pressure reaches the expected and balanced state, avoid the problem that insufficient load bearing leads to the decline of the guiding performance and increases the risk of derailment, or the problem that overloading leads to the easy damage of the wheel set and reduces the load bearing of the driving wheel and thus reduces the traction performance. When the tractor is off the track, the pull rod of the first telescopic cylinder 210 is retracted, so that the oscillating arm 220 is rotated upward until the guide wheel set device is retracted to the initial position. At this position, the guide wheel set device has the maximum ground clearance and the maximum included angle with the horizontal direction of the ground, so as to ensure the passability of the vehicle on the highway.

[0037] The aforementioned guide wheel lifting device 200 has the following advantages: First, the first telescopic cylinder 210 drives the swing arm 220 to rotate and lift, forming a lever structure with the first drive cylinder and the swing arm 220. Under the same load, this reduces driving power and energy consumption. Second, the swing arm 220 is connected to the guide wheel device 400. Compared to the guide wheel device 400 being directly connected to the first telescopic cylinder 210, this avoids rigid impacts directly acting on the internal transmission components of the first telescopic cylinder 210, reducing wear on the internal structure of the first telescopic cylinder 210 and extending its service life. Third, by setting a spring 250, which provides a certain preload, when the vehicle travels on a bumpy road section and the overall structure tends to derail, the pressure of the guide wheel device 400 on the rail decreases, and the spring 250 releases its compression to push the swing arm 220 downward, maintaining the stability of the guide device's pressure on the rail and significantly reducing the risk of rail climbing / derailment.

[0038] In this embodiment, the swing arm 220 includes two parallel connecting arms 221, a connecting plate 222 connecting the two connecting arms 221 together, and a rotating block 230. The two ends of the two connecting arms 221 are respectively hinged to the second mounting base 500 and the guide wheel device 400. The connecting plate 222 is shaped like a "well" and has a mounting cavity 223 in its middle position. The rotating block 230 is hinged to the mounting cavity 223 via a second rotating shaft. The two sides of the rotating block 230 are limited and engaged with the inner sidewall of the mounting cavity 223. The pull rod of the first telescopic cylinder 210 is hinged to the rotating block 230, and the pull rod is perpendicular to the second rotating shaft. When the guide wheel device 400 needs to be lowered, the pull rod of the first telescopic cylinder 210 extends, pushing the swing arm 220 downwards to place the guide wheel device 400 on the guide rail. Similarly, when it needs to be retracted, the pull rod of the first telescopic cylinder 210 retracts, thus retracting the guide wheel device 400.

[0039] In the aforementioned swing arm 220, the connecting plate 222 is specifically configured as a "well"-shaped structure to form a mounting cavity 223. The two sides of the rotating block 230 are limited and fitted with the inner sidewall of the mounting cavity 223. This does not mean that the two are in contact, but that there is a certain gap. This ensures the smooth rotation of the rotating block 230 while maintaining a compact overall structure. The "well"-shaped connecting plate 222 connects the two connecting arms 221, improving the overall structural strength and rigidity of the swing arm 220, increasing its load-bearing capacity and service life, and also reducing its weight. The rotating block 230 is hinged to the mounting cavity 223 via a second pivot, making its pull rod perpendicular to the second pivot. This maximizes the mechanical efficiency of the pushing and pulling force of the first telescopic cylinder 210 during the entire process of lowering or retracting the guide rotary device, allowing for a larger torque output and reducing the requirements on the first telescopic cylinder 210.

[0040] The rotating block 230 is provided with cross-shaped channels, the pull rod of the first telescopic cylinder 210 is inserted into one of the channels, and the other channel is used for inserting the pin shaft, so that the pin shaft is finally connected to the rotating connecting plate 222 through the rotating block 230 and the pull rod of the first telescopic cylinder 210. The rotating block 230 is provided with a limiting groove 231, and the end of the spring 250 is clamped in the limiting groove 231, so that the spring 250 can be reliably matched with the rotating block 230, and the spring 250 is prevented from being separated from the limiting groove 231.

[0041] The first telescopic cylinder 210 is provided with two, which are respectively hinged to the outer sides of the two connecting arms 221.

[0042] In the embodiment, the other end of the swing arm 220 is hinged to the guide wheel device 400 through a first rotating shaft. The device further comprises a turnover adjusting mechanism 300, the turnover adjusting mechanism 300 comprises a second telescopic cylinder 310 and an adjusting block 320, the second telescopic cylinder 310 is hinged to the swing arm 220, the middle position of the adjusting block 320 is hinged to the first rotating shaft, the end of the top surface of the adjusting block 320 is provided with a first hinge seat 330, the pull rod of the second telescopic cylinder 310 is hinged to the first hinge seat 330, and the two ends of the bottom surface of the adjusting block 320 are lower pressing surfaces in contact with the guide wheel device 400. During the process of placing the guide wheel device 400 on the track, the adjusting block 320 is driven to rotate through the pull rod of the second telescopic cylinder 310, and then the guide wheel device 400 is overturned, so that each wheel of the guide wheel device 400 can be in contact with the track.

[0043] The turnover adjusting mechanism 300 is provided with two groups, and the two second telescopic rods are respectively located on the two sides of the swing arm 220, and the two adjusting blocks 320 are respectively hinged to the two ends of the first rotating shaft.

[0044] The two sides of the swing arm 220 are respectively provided with a second hinge seat 240 for mounting the second telescopic cylinder 310.

[0045] Embodiment 2

[0046] A highway-railway dual-purpose tractor comprises a tractor main body and a wheel set guide device. In the embodiment, the wheel set guide device is the rotatable and liftable wheel set guide device of the wheel set guide device embodiment 1.

[0047] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A rotatable lift wheel set guide, characterized by: It includes a first mounting base, a guide wheel lifting device disposed on the first mounting base, a guide wheel device disposed at the bottom of the guide wheel lifting device, and a second mounting base. The first mounting base is disposed at the rear of the chassis of the tractor vehicle, and the second mounting base is disposed on the chassis beam. The guide wheel lifting device includes a first telescopic cylinder, a swing arm, and a spring; One end of the swing arm is hinged to the second mounting base, and the other end of the swing arm is connected to the guide wheel device; The first telescopic cylinder is connected to the first mounting base, and the pull rod of the first telescopic cylinder is hinged to the swing arm for driving the swing arm to rotate and lift and rotate and lower. The extended end of the pull rod of the first telescopic cylinder is provided with a limiting part. The spring is sleeved on the pull rod of the first telescopic cylinder, and the two ends of the spring are respectively pressed against the limiting part and the swing arm.

2. The rotatable lift wheel set guide of claim 1, wherein: The swing arm includes two parallel connecting arms, a connecting plate connecting the two connecting arms together, and a rotating block. The two ends of the two connecting arms are respectively hinged to the second mounting base and the guide wheel device. The connecting plate is in the shape of a "well" and has a mounting cavity in the middle. The rotating block is hinged to the mounting cavity through a second rotating shaft. The pull rod of the first telescopic cylinder is hinged to the rotating block and the pull rod is perpendicular to the second rotating shaft.

3. The rotatable lift wheel set guide of claim 2, wherein: The two sides of the rotating block are limited and fitted with the inner sidewall of the mounting cavity.

4. The rotatable lift wheel set guide of claim 2, wherein: The rotating block is provided with a limiting groove, and the end of the spring is engaged in the limiting groove.

5. The rotatable lift wheel set guide of claim 1, wherein: The other end of the swing arm is hinged to the guide wheel device via the first rotating shaft; It also includes a flipping adjustment mechanism, which includes a second telescopic cylinder and an adjustment block. The second telescopic cylinder is hinged to the swing arm, and the middle position of the adjustment block is hinged to the first rotating shaft. The top end of the adjustment block is provided with a first hinge seat, and the pull rod of the second telescopic cylinder is hinged to the first hinge seat. The two ends of the bottom surface of the adjustment block are downward pressing surfaces that contact the guide wheel device.

6. The rotatable lift wheel set guide of claim 5, wherein: The flipping adjustment mechanism has two sets, with two second telescopic rods located on both sides of the swing arm, and two adjustment blocks hinged to both ends of the first rotating shaft.

7. The rotatable lift wheel set guide of claim 6, wherein: Each side of the swing arm is provided with a second hinge seat for mounting the second telescopic cylinder.

8. The rotatable lift wheel set guide of claim 1, wherein: The lever of the first telescopic cylinder is hinged to the middle position of the swing arm.

9. An amphibious tractor comprising a tractor body and a wheel set guide, characterized in that: The wheel guide device is the rotatable and liftable wheel guide device as described in any one of claims 1-8.

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