阅读说明：本技术 一种用于施工车辆的复合轮 (Composite wheel for construction vehicle ) 是由 刘小毅 胡建东 秦先文 于 2021-01-13 设计创作，主要内容包括：一种用于施工车辆的复合轮,包括行走装置,所述的行走装置包括主动轮、轨道轮以及连接座,连接座的一端固定在轨道轮上,另一端固定在主动轮上,轨道轮的直径小于主动轮的直径。采用复合轮,将主动轮和轨道轮通过连接座连接在一起,在路面上行驶,就用主动轮,在轨道上行驶,就用轨道轮,因此,不需要更换轮胎,就能够适应路况的变化；轮架能够围绕固定在车体上的固定轴转动,能够根据路面情况自动围绕固定轴转动以适应路面的弧度,从而不仅能够在平坦的路面行驶,也能够在具有不同弧度的隧道里行驶。(The utility model provides a composite wheel for construction vehicle, includes running gear, running gear include action wheel, rail wheel and connecting seat, the one end of connecting seat is fixed on the rail wheel, the other end is fixed on the action wheel, the diameter of rail wheel is less than the diameter of action wheel. The composite wheel is adopted, the driving wheel and the track wheel are connected together through the connecting seat, when the vehicle runs on the road surface, the driving wheel is used, when the vehicle runs on the track, the track wheel is used, and therefore, the vehicle can adapt to the change of road conditions without replacing tires; the wheel carrier can rotate around the fixed shaft fixed on the vehicle body, and can automatically rotate around the fixed shaft according to the road surface condition to adapt to the radian of the road surface, so that the vehicle can run on a flat road surface and also can run in tunnels with different radians.)

1. A composite wheel for a construction vehicle, comprising a running gear, characterized in that: the walking device comprises a driving wheel (1), a track wheel (2) and a connecting seat (3), one end of the connecting seat is fixed on the track wheel, the other end of the connecting seat is fixed on the driving wheel, and the diameter of the track wheel is smaller than that of the driving wheel.

2. The composite wheel for a construction vehicle according to claim 1, wherein: the connecting seat protrudes outwards from the side of the central seat of the rail wheel.

3. The composite wheel for a construction vehicle according to claim 1, wherein: the walking device also comprises a driven wheel (4).

4. The composite wheel for a construction vehicle according to claim 1, wherein: the composite wheel also comprises a wheel carrier (5) and a shaft seat (6), wherein the wheel carrier (5) is provided with a wheel carrier shaft protruding towards two sides, a hole is formed along the center of the wheel carrier shaft, and a fixed shaft (71) on the construction vehicle (7) penetrates through the hole on the wheel carrier shaft to enable the wheel carrier to rotate around the fixed shaft under the action of external force; the wheel carrier (5) is provided with an intermediate shaft (51) which is vertical to the wheel carrier shaft and protrudes outwards, the shaft seat is provided with a shaft hole, the intermediate shaft on the wheel carrier is inserted into the shaft hole on the shaft seat, and the shaft seat can rotate around the intermediate shaft under the action of external force; the composite wheel also comprises a driving device (8); the driving device comprises a chain wheel (81), a walking motor (82) and a chain (83); the central seat of the track wheel protrudes towards the direction far away from the driving wheel, the chain wheel is fixed on the end surface of the central seat far away from the driving wheel, and the chain wheel is connected with the output end of the walking motor; the driving wheel and the track wheel are arranged on the shaft seat.

5. The composite wheel for a construction vehicle according to claim 4, wherein: the composite wheel further comprises a steering device (9), the steering device mainly comprises a steering shaft (91), a steering gear (92) and a steering motor (93), one end of the steering shaft is connected with the steering motor, and the other end of the steering shaft is connected with the steering gear.

6. The composite wheel for a construction vehicle according to claim 5, wherein: the intermediary shaft is provided with a key slot (52), the tail end of the intermediary shaft is provided with a thread, the plane bearing (53) is sleeved on the intermediary shaft (51), the intermediary shaft downwards passes through a shaft hole on the shaft seat (6) and is inserted into the intermediary toothed ring (54), a toothed ring key at the center of the intermediary toothed ring (54) is inserted into the corresponding key slot (52) on the intermediary shaft (51), the thread at the tail end of the intermediary shaft passes through the intermediary toothed ring to be exposed, the intermediary nut (35) is screwed on the thread at the tail end of the intermediary shaft, so that the wheel carrier and the intermediary toothed ring are integrated into a whole, and the intermediary toothed ring rotates to drive the wheel; a sector ratchet (56) protruding outwards is arranged on the side of the intermediate gear ring (54), the sector ratchet is meshed with an intermediate gear (62) arranged on a shaft seat connecting lug (61) protruding outwards of the shaft seat (6), and the intermediate gear (62) is meshed with a steering gear (92); the intermediate gear shaft of the intermediate gear (62) passes through the intermediate bearing (63), and the intermediate bearing is arranged in the intermediate shaft hole of the shaft seat connecting lug, so that the intermediate gear shaft can rotate in the intermediate bearing under the action of external force.

7. The composite wheel for a construction vehicle according to claim 6, wherein: a motor base (64) is arranged on the shaft seat (6), a steering motor (93) and a walking motor (82) are fixed on the top of the motor base, two motor base legs extending downwards of the motor base are respectively fixed on two sides of the shaft seat, wheel frame shafts protruding outwards on two sides of the wheel frame (5) are positioned on the same side of the two shaft base legs, one motor base leg of the motor base abuts against the wheel frame shaft on the wheel frame on the same side to be incapable of rotating any more during steering, and the maximum deflection angle in the horizontal direction is 5-15 degrees no matter whether the left rotation or the right rotation is performed; the steering motor (93) drives the steering shaft to rotate, the steering shaft drives the steering gear to rotate, the steering gear drives the intermediary gear meshed with the steering shaft to rotate, the intermediary gear drives the fan-shaped ratchet protruding outwards on the edge of the intermediary gear ring meshed with the intermediary gear to rotate, so that the intermediary gear sleeved with the intermediary gear ring is driven to rotate, and the wheel carrier rotates in the horizontal direction to realize steering; the right turn or the left turn of the wheel carrier is realized by inputting forward current or reverse current to the steering motor.

8. The composite wheel for a construction vehicle according to claim 6, wherein: the axle seat connecting lug (61) protrudes outwards from the side of the axle seat and then inclines towards the direction of the track wheel, the intermediate axle hole is positioned on the part of the axle seat connecting lug, which is vertical to the axle seat, and the tail end of the axle seat connecting lug, which is far away from the axle seat, is provided with a steering hole; one end of the steering shaft is fixed on a bevel gear, the bevel gear is meshed with another bevel gear fixed on an output shaft of the steering motor, and the other end of the steering shaft passes through a bearing shaft arranged in a steering hole and then is fixed on a steering gear (92).

9. The composite wheel for a construction vehicle according to claim 6, wherein: a driving wheel multi-stage tower-shaped shaft protruding towards the driving wheel is arranged on one side of the shaft seat (6), a driven wheel multi-stage tower-shaped shaft protruding towards the driven wheel is arranged on the opposite side of the shaft seat, threads are arranged on the outer wall of the tail end of the driving wheel multi-stage tower-shaped shaft, and threads are also arranged on the outer wall of the tail end of the driven wheel multi-stage tower-shaped shaft; the wheel hub of the driving wheel (1) is a split wheel hub, a tire is fixed on a tire groove formed by butting two split wheel hubs locked together by screws, a chain wheel (81) is fixed on the wall surface of the rail wheel back to the driving wheel by screws, and a conical bearing (21) and a framework oil seal (22) are sequentially placed in a central hole at one end, close to the chain wheel, of the rail wheel (2); a driven wheel hub bushing (41) is also arranged in the hub of the driven wheel (4).

10. The composite wheel for a construction vehicle according to claim 9, wherein: a multi-stage tower-shaped shaft of a driving wheel on a shaft seat is inserted into a central through hole of a chain wheel, a track wheel and the driving wheel from one side of the chain wheel, a driving wheel gasket and a driving wheel snap ring (11) are sequentially sleeved at the tail end of the multi-stage tower-shaped shaft of the driving wheel, a driving wheel nut is screwed on the multi-stage tower-shaped shaft, one side of the driving wheel snap ring is bent towards the direction of the driving wheel nut and then pressed on the driving wheel nut, so that the driving wheel snap ring and the driving wheel nut can not move any more, and then driving wheel oil seal paper (12) and; after a driven wheel multi-stage tower-shaped shaft of the shaft seat is inserted into a driven wheel hub bushing (41), a driven wheel washer and a driven wheel snap ring (42) are sleeved, a driven wheel nut is screwed, one side of the driven wheel snap ring is screwed towards the direction of the driven wheel nut and then pressed on the driven wheel nut, so that the driven wheel nut and the driven wheel snap ring can not move any more, and then driven wheel oil seal paper (43) and a driven wheel cover plate (44) are fixed on the driven wheel hub bushing (41) through screws.

Technical Field

The invention relates to a composite wheel mainly used for construction vehicles for subway or high-speed rail construction and belongs to the optimization technology of construction vehicle wheels.

Background

In the process of subway construction and high-speed rail construction, a construction vehicle is provided with a rubber tire and can run on a road surface, or is provided with a track wheel and can run on a paved track.

However, in practical applications, where a track is not laid, a construction vehicle needs to run on the road surface, and where a track is already laid, the construction vehicle cannot run on the road surface, but instead runs on the track. In the process of road construction, certain road sections are necessarily paved with tracks, and certain road sections are not paved with tracks and can only travel on the road surface. The road surface here includes a general road surface and also includes a bottom wall of the tunnel. The current treatment method is to mount a rubber tire when driving on a road surface, and to dismount the rubber tire when driving on a rail, and to mount a rail wheel matched with the rail. When the running on the road is changed to the running on the road, the rail wheels are required to be replaced by rubber tires.

The rubber tires and the rail wheels are replaced, the operation is time-consuming and labor-consuming, the temporarily unused rubber tires or rail wheels are detached, and the rubber tires or the rail wheels need to be stored in places. Are usually placed on the construction vehicle so that they can be replaced in time when replacement is required.

Adopt the mode of changing to switch between rubber tire and rail wheel, it is consuming time hard still need deposit rail wheel or rubber wheel separately.

Therefore, it is necessary to find a wheel for construction vehicles which is more time-saving, labor-saving and economical.

Disclosure of Invention

The purpose of the invention is: provides a wheel for construction vehicles, which is more time-saving, labor-saving and economical.

The technical scheme of the invention is as follows: the utility model provides a compound wheel for construction vehicle, includes running gear, running gear include action wheel 1, rail wheel 2 and connecting seat 3, the one end of connecting seat is fixed on the rail wheel, the other end is fixed on the action wheel, the diameter of rail wheel is less than the diameter of action wheel.

The connecting seat protrudes outwards from the side of the central seat of the rail wheel. I.e. the connecting socket may be a separate part or may be integrated with the rail wheel.

The walking device also comprises a driven wheel 4.

The composite wheel also comprises a wheel frame 5 and a shaft seat 6, wherein the wheel frame 5 is provided with a wheel frame shaft protruding towards two sides, a hole is formed along the center of the wheel frame shaft, and a fixed shaft 71 on the construction vehicle 7 penetrates through the hole on the wheel frame shaft to enable the wheel frame to rotate around the fixed shaft under the action of external force; the wheel carrier 5 is provided with an intermediate shaft 51 which is vertical to the wheel carrier shaft and protrudes outwards, the shaft seat is provided with a shaft hole, the intermediate shaft on the wheel carrier is inserted into the shaft hole on the shaft seat, and the shaft seat can rotate around the intermediate shaft under the action of external force;

the composite wheel also comprises a driving device 8; the driving device comprises a chain wheel 81, a walking motor 82 and a chain 83; the central seat of the track wheel protrudes towards the direction far away from the driving wheel, the chain wheel is fixed on the end surface of the central seat far away from the driving wheel, and the chain wheel is connected with the output end of the walking motor; the driving wheel and the track wheel are arranged on the shaft seat.

The composite wheel also comprises a steering device 9 which mainly comprises a steering shaft 91, a steering gear 92 and a steering motor 93, wherein one end of the steering shaft is connected with the steering motor, and the other end of the steering shaft is connected with the steering gear.

The intermediary shaft 51 is provided with a key slot 52, the tail end of the intermediary shaft is provided with a thread, the plane bearing 53 is sleeved on the intermediary shaft 51, the intermediary shaft downwards passes through a shaft hole on the shaft seat 6 and is inserted into the intermediary toothed ring 54, a toothed ring key at the center of the intermediary toothed ring 54 is inserted into the corresponding key slot 52 on the intermediary shaft 51, the thread at the tail end of the intermediary shaft is exposed through the intermediary toothed ring, the intermediary nut 55 is screwed on the thread at the tail end of the intermediary shaft, the wheel carrier and the intermediary toothed ring are integrated, and the intermediary toothed ring rotates to drive the wheel carrier to rotate; sector ratchets 56 protruding outwards are arranged on the lateral sides of the intermediate gear ring 54, the sector ratchets 56 are meshed with an intermediate gear 62 arranged on an axle seat receiving lug 61 protruding outwards of the axle seat 6, and the intermediate gear 62 is meshed with a steering gear 92; the intermediate gear shaft of the intermediate gear 62 passes through the intermediate bearing 63, and the intermediate bearing is arranged in the intermediate shaft hole of the shaft seat joint lug, so that the intermediate gear shaft can rotate in the intermediate bearing under the action of external force.

The axle seat 6 is provided with a motor seat 64, the steering motor 93 and the walking motor 82 are fixed on the top of the motor seat, two motor seat legs extending downwards of the motor seat are respectively fixed on two sides of the axle seat, wheel frame shafts protruding outwards on two sides of the wheel frame 5 are positioned on the same side of the two axle seat legs, when the wheel frame shafts are turned, one motor seat leg of the motor seat is abutted to the wheel frame shaft on the wheel frame on the same side, so that the wheel frame shaft can not rotate any more, and the maximum deflection angle in the horizontal direction is between 5 and 15 degrees no matter the wheel frame shaft is turned left or right; the steering motor 93 drives the steering shaft to rotate, the steering shaft drives the steering gear to rotate, the steering gear drives the intermediary gear meshed with the steering gear to rotate, the intermediary gear drives the fan-shaped ratchet protruding outwards on the edge of the intermediary gear ring meshed with the intermediary gear to rotate, so that the intermediary gear sleeved with the intermediary gear ring is driven to rotate, and the wheel carrier rotates in the horizontal direction to realize steering; the right turn or the left turn of the wheel carrier is realized by inputting forward current or reverse current to the steering motor.

The axle seat lug 61 protrudes outwards from the side of the axle seat and then inclines towards the direction of the track wheel, the intermediate axle hole is positioned on the part of the axle seat lug perpendicular to the axle seat, and a steering hole is arranged at the tail end of the axle seat lug far away from the axle seat; one end of the steering shaft is fixed on a bevel gear, the bevel gear is engaged with another bevel gear fixed on the output shaft of the steering motor, and the other end of the steering shaft passes through a bearing shaft arranged in the steering hole and then is fixed on the steering gear 92.

A driving wheel multi-stage tower-shaped shaft protruding towards the driving wheel is arranged on one side of the shaft seat 6, a driven wheel multi-stage tower-shaped shaft protruding towards the driven wheel is arranged on the other opposite side of the shaft seat, threads are arranged on the outer wall of the tail end of the driving wheel multi-stage tower-shaped shaft, and threads are also arranged on the outer wall of the tail end of the driven wheel multi-stage tower-shaped shaft; the hub of the driving wheel 1 is a split hub, a tire is fixed on a tire groove formed by butting two split hubs locked together by screws, a chain wheel 81 is fixed on the wall surface of the rail wheel back to the driving wheel by screws, and a conical bearing 21 and a framework oil seal 22 are sequentially placed in a central hole at one end of the rail wheel 2 close to the chain wheel; a driven wheel hub bushing 41 is also provided in the hub of the driven wheel 4.

A multi-stage tower-shaped shaft of a driving wheel on a shaft seat is inserted into a central through hole of a chain wheel, a track wheel and the driving wheel from one side of the chain wheel, a driving wheel gasket and a driving wheel snap ring 11 are sequentially sleeved at the tail end of the multi-stage tower-shaped shaft of the driving wheel, then a driving wheel nut is screwed on the multi-stage tower-shaped shaft, one side of the driving wheel snap ring is bent towards the direction of the driving wheel nut and then pressed on the driving wheel nut, so that the driving wheel snap ring and the driving wheel nut can not move any more, and then driving wheel; after a driven wheel multi-stage tower-shaped shaft of the shaft seat is inserted into a driven wheel hub bushing 41, a driven wheel washer and a driven wheel snap ring 42 are sleeved, a driven wheel nut is screwed, one side of the driven wheel snap ring is spirally folded towards the direction of the driven wheel nut and then pressed on the driven wheel nut, so that the driven wheel nut and the driven wheel snap ring can not move any more, and then a driven wheel oil seal paper 43 and a driven wheel cover plate 44 are fixed on the driven wheel hub bushing 41 through screws.

The tail end of the driving wheel multistage trapezoidal shaft is provided with a driving wheel clamping ring groove, correspondingly, the inner wall of the driving wheel clamping ring is provided with a driving wheel clamping ring key which protrudes inwards, and when the driving wheel clamping ring is sleeved on the driving wheel multistage trapezoidal shaft, the driving wheel clamping ring key on the driving wheel clamping ring enters the driving wheel clamping ring groove; the tail end of the driven wheel multi-stage trapezoidal shaft is provided with a driven wheel clamping ring groove, correspondingly, the inner wall of the driven wheel clamping ring is provided with a driven wheel clamping ring key protruding inwards, and when the driven wheel clamping ring is sleeved on the driven wheel multi-stage trapezoidal shaft, the driven wheel clamping ring key on the driven wheel clamping ring enters the driven wheel clamping ring groove.

When the construction vehicle runs on the inner wall of the tunnel with the radian, the wheel frame can automatically deflect around the fixed shaft under the extrusion action of the inner wall of the tunnel to adapt to the radian of the inner wall of the tunnel, and the projection of the central line of the fixed shaft on the ground is positioned on the central line of the tread of the driving wheel tire.

Has the advantages that:

1. the composite wheel is adopted, the driving wheel and the track wheel are connected together through the connecting seat, when the vehicle runs on the road surface, the driving wheel is used, when the vehicle runs on the track, the track wheel is used, and therefore, the vehicle can adapt to the change of road conditions without replacing tires;

2. the wheel carrier can rotate around the fixed shaft fixed on the vehicle body, and can automatically rotate around the fixed shaft according to the road surface condition to adapt to the radian of the road surface, so that the vehicle can run on a flat road surface and also can run in tunnels with different radians;

3. the wheel carrier can rotate on the shaft seat, and the steering motor is input with forward current or reverse current to realize the right rotation or left rotation of the wheel carrier, so that the steering is realized;

4. the steering range is controlled to be 5-15 degrees, two motor seat legs extending downwards of a motor seat are respectively fixed on two sides of a shaft seat, wheel frame shafts protruding outwards on two sides of a wheel frame are positioned on the same side of the two shaft seat legs, when the steering wheel is turned, one motor seat leg of the motor seat is abutted against the wheel frame shaft on the wheel frame on the same side, so that the wheel frame shaft cannot rotate, and the maximum deflection angle in the horizontal direction is 5-15 degrees no matter whether the wheel frame is turned left or right.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic partial burst view of FIG. 1;

FIG. 3 is a schematic partial burst view of FIG. 2;

FIG. 4 is a schematic partial burst view of FIG. 3;

FIG. 5 is a schematic partial burst view of FIG. 4;

FIG. 6 is a schematic partial burst view of FIG. 5;

FIG. 7 is a schematic partial cross-sectional view of FIG. 6;

FIG. 8 is an enlarged fragmentary view of a portion of FIG. 7;

FIG. 9 is an enlarged fragmentary view of another portion of FIG. 7;

FIG. 10 is a schematic exploded view of the sprocket, rail wheel and drive wheel;

FIG. 11 is a schematic partial cross-sectional view of a sprocket, a rail wheel and a drive wheel;

FIG. 12 is a schematic partial cross-sectional view of a driven wheel;

FIG. 13 is a schematic view of a partial explosion of the present invention;

FIG. 14 is a schematic perspective view of an embodiment of the present invention;

FIG. 15 is a schematic view of a set of composite wheels of the embodiment of FIG. 14;

FIG. 16 is a schematic partial burst view of FIG. 15;

fig. 17 shows an embodiment of the present invention.

Detailed Description

As shown in fig. 1 to 13, a composite wheel for a construction vehicle, hereinafter referred to as a composite wheel. Including running gear, running gear include action wheel 1, rail wheel 2 and connecting seat 3, the one end of connecting seat is fixed on the rail wheel, the other end is fixed on the action wheel, the diameter of rail wheel is less than the diameter of action wheel.

The connecting seat protrudes outwards from the side of the central seat of the rail wheel. I.e. the connecting socket may be a separate part or may be integrated with the rail wheel. A connecting socket bearing 31 is placed in the central through hole of the connecting socket 3.

The walking device also comprises a driven wheel 4.

As shown in fig. 14 to 17, the composite wheel is used on a construction vehicle 7. The composite wheel also comprises a wheel frame 5 and a shaft seat 6, wherein a wheel frame shaft protruding towards two sides is arranged on the wheel frame 3, a hole is formed along the center of the wheel frame shaft, and a fixed shaft 71 on the construction vehicle 7 penetrates through the hole on the wheel frame shaft to enable the wheel frame to rotate around the fixed shaft under the action of external force; the wheel carrier 5 is provided with an intermediate shaft 51 which is perpendicular to the wheel carrier shaft and protrudes outwards, the shaft seat is provided with a shaft hole, the intermediate shaft on the wheel carrier is inserted into the shaft hole on the shaft seat, and the shaft seat can rotate around the intermediate shaft under the action of external force. The construction vehicle is provided with a fixed lug 72, a fixed shaft 71 penetrates through two adjacent fixed lugs, and the composite wheel is fixed between the two fixed lugs, so that the composite wheel can rotate around the fixed shaft.

The composite wheel also comprises a driving device 8; the driving device comprises a chain wheel 81, a walking motor 82 and a chain 83; the central seat of the track wheel protrudes towards the direction far away from the driving wheel, the chain wheel is fixed on the end surface of the central seat far away from the driving wheel, and the chain wheel is connected with the output end of the walking motor; the driving wheel and the track wheel are arranged on the shaft seat. When the walking motor works, the chain wheel is driven by the chain to rotate, and the chain wheel drives the center seat fixed together with the chain wheel to rotate, so that the rail wheel fixed together with the center seat rotates, and the driving wheel fixed together with the rail wheel rotates.

The driving device is used for providing power for the composite wheel, so that the composite wheel can drive the construction vehicle to move forwards or backwards.

The composite wheel also comprises a steering device 9 which mainly comprises a steering shaft 91, a steering gear 92 and a steering motor 93, wherein one end of the steering shaft is connected with the steering motor, and the other end of the steering shaft is connected with the steering gear. The steering device realizes the deflection of the composite wheel in the horizontal direction, thereby realizing the deflection of the construction vehicle in the driving direction.

The intermediary shaft is provided with a key slot 52, the tail end of the intermediary shaft is provided with a thread, the plane bearing 53 is sleeved on the intermediary shaft 51, the intermediary shaft downwards passes through a shaft hole on the shaft seat 6 and is inserted into the intermediary toothed ring 54, a toothed ring key at the center of the intermediary toothed ring 54 is inserted into the corresponding key slot 52 on the intermediary shaft 51, the thread at the tail end of the intermediary shaft is exposed through the intermediary toothed ring, the intermediary nut 55 is screwed on the thread at the tail end of the intermediary shaft, the wheel carrier and the intermediary toothed ring are integrated, and the intermediary toothed ring rotates to drive the wheel carrier to rotate; the side of the intermediate gear ring 54 is provided with a sector ratchet 56 which protrudes outwards, the sector ratchet is meshed with an intermediate gear 62 which is arranged on a shaft seat connecting lug 61 which protrudes outwards of the shaft seat 6, and the intermediate gear 62 is meshed with a steering gear 92; the intermediate gear shaft of the intermediate gear 62 passes through the intermediate bearing 63, and the intermediate bearing is arranged in the intermediate shaft hole of the shaft seat joint lug, so that the intermediate gear shaft can rotate in the intermediate bearing under the action of external force.

In order to prevent the intermediary nut from loosening, the end of the intermediary shaft is provided with an intermediary shaft hole, the intermediary nut is provided with a corresponding intermediary nut groove or an intermediary nut hole, after the intermediary nut is screwed on the intermediary shaft, the intermediary pin 57 is inserted into the intermediary nut groove or the intermediary nut hole or the intermediary shaft hole, and the intermediary nut is fixed on the intermediary shaft, so that the intermediary nut cannot loosen in the using process.

The axle seat 6 is provided with a motor seat 64, the steering motor 93 and the walking motor 82 are fixed on the top of the motor seat, two motor seat legs extending downwards of the motor seat are respectively fixed on two sides of the axle seat, wheel frame shafts protruding outwards on two sides of the wheel frame 5 are positioned on the same side of the two axle seat legs, when the wheel frame shafts are turned, one motor seat leg of the motor seat is abutted to the wheel frame shaft on the wheel frame on the same side, so that the wheel frame shaft can not rotate any more, and the maximum deflection angle in the horizontal direction is between 5 and 15 degrees no matter the wheel frame shaft is turned left or right; the steering motor 93 drives the steering shaft to rotate, the steering shaft drives the steering gear to rotate, the steering gear drives the intermediary gear meshed with the steering gear to rotate, the intermediary gear drives the fan-shaped ratchet protruding outwards on the edge of the intermediary gear ring meshed with the intermediary gear to rotate, so that the intermediary gear sleeved with the intermediary gear ring is driven to rotate, and the wheel carrier rotates in the horizontal direction to realize steering; the right turn or the left turn of the wheel carrier is realized by inputting forward current or reverse current to the steering motor.

The axle seat lug 61 protrudes outwards from the side of the axle seat and then inclines towards the direction of the track wheel, the intermediate axle hole is positioned on the part of the axle seat lug perpendicular to the axle seat, and a steering hole is arranged at the tail end of the axle seat lug far away from the axle seat; one end of the steering shaft is fixed on a bevel gear, the bevel gear is engaged with another bevel gear fixed on the output shaft of the steering motor, and the other end of the steering shaft passes through a bearing shaft arranged in the steering hole and then is fixed on the steering gear 92.

A driving wheel multi-stage tower-shaped shaft protruding towards the driving wheel is arranged on one side of the shaft seat 6, a driven wheel multi-stage tower-shaped shaft protruding towards the driven wheel is arranged on the other opposite side of the shaft seat, threads are arranged on the outer wall of the tail end of the driving wheel multi-stage tower-shaped shaft, and threads are also arranged on the outer wall of the tail end of the driven wheel multi-stage tower-shaped shaft; the hub of the driving wheel 1 is a split hub, a tire is fixed on a tire groove formed by butting two split hubs locked together by screws, a chain wheel 81 is fixed on the wall surface of the rail wheel back to the driving wheel by screws, and a conical bearing 21 and a framework oil seal 22 are sequentially placed in a central hole at one end of the rail wheel 2 close to the chain wheel; a driven wheel hub bushing 41 is also provided in the hub of the driven wheel 4.

A multi-stage tower-shaped shaft of a driving wheel on a shaft seat is inserted into a central through hole of a chain wheel, a track wheel and the driving wheel from one side of the chain wheel, a driving wheel gasket and a driving wheel snap ring 11 are sequentially sleeved at the tail end of the multi-stage tower-shaped shaft of the driving wheel, then a driving wheel nut is screwed on the multi-stage tower-shaped shaft, one side of the driving wheel snap ring is bent towards the direction of the driving wheel nut and then pressed on the driving wheel nut, so that the driving wheel snap ring and the driving wheel nut can not move any more, and then driving wheel; after a driven wheel multi-stage tower-shaped shaft of the shaft seat is inserted into a driven wheel hub bushing 41, a driven wheel washer and a driven wheel snap ring 42 are sleeved, a driven wheel nut is screwed, one side of the driven wheel snap ring is spirally folded towards the direction of the driven wheel nut and then pressed on the driven wheel nut, so that the driven wheel nut and the driven wheel snap ring can not move any more, and then a driven wheel oil seal paper 43 and a driven wheel cover plate 44 are fixed on the driven wheel hub bushing 41 through screws.

The tail end of the driving wheel multistage trapezoidal shaft is provided with a driving wheel clamping ring groove, correspondingly, the inner wall of the driving wheel clamping ring is provided with a driving wheel clamping ring key which protrudes inwards, and when the driving wheel clamping ring is sleeved on the driving wheel multistage trapezoidal shaft, the driving wheel clamping ring key on the driving wheel clamping ring enters the driving wheel clamping ring groove; the tail end of the driven wheel multi-stage trapezoidal shaft is provided with a driven wheel clamping ring groove, correspondingly, the inner wall of the driven wheel clamping ring is provided with a driven wheel clamping ring key protruding inwards, and when the driven wheel clamping ring is sleeved on the driven wheel multi-stage trapezoidal shaft, the driven wheel clamping ring key on the driven wheel clamping ring enters the driven wheel clamping ring groove.

The tail end of the multi-stage trapezoidal shaft of the driving wheel is provided with a driving wheel clamping ring groove, correspondingly, the inner wall of the driving wheel clamping ring is provided with a driving wheel clamping ring key which protrudes inwards, when the driving wheel clamping ring is sleeved on the multi-stage trapezoidal shaft of the driving wheel, the driving wheel clamping ring key on the driving wheel clamping ring enters the driving wheel clamping ring groove, and the driving wheel clamping ring cannot rotate around the multi-stage trapezoidal shaft of the driving wheel under the action of external force.

Similarly, the tail end of the driven wheel multi-stage trapezoidal shaft is provided with a driven wheel clamping ring groove, correspondingly, an inward protruding driven wheel clamping ring key is arranged on the inner wall of the driven wheel clamping ring, the driven wheel clamping ring is sleeved on the driven wheel multi-stage trapezoidal shaft, the driven wheel clamping ring key on the driven wheel clamping ring enters the driven wheel clamping ring groove, and the driven wheel clamping ring cannot rotate around the driven wheel multi-stage trapezoidal shaft under the action of external force.

As shown in fig. 17, when the construction vehicle using the present invention runs on the inner wall of the tunnel with a curvature, the wheel frame will automatically deflect around the fixed shaft to adapt to the curvature of the inner wall of the tunnel under the squeezing action of the inner wall of the tunnel, and the projection of the central line of the fixed shaft on the ground is located outside the central line of the tread of the driving wheel tire.

The above-mentioned embodiments are only used for illustrating the application of the present invention, and are not meant to be limiting, and those skilled in the art should make various changes or substitutions within the spirit of the present invention, and shall fall within the protection scope of the present invention.