CN220009955U - Auxiliary wheel device for vehicle and vehicle - Google Patents

Abstract

The utility model discloses a vehicle auxiliary wheel device and a vehicle, and relates to the technical field of vehicle auxiliary wheels, wherein the vehicle auxiliary wheel device comprises: a fixed bracket for mounting to a body or subframe of a vehicle; the turning arm is pivotally mounted on the fixed bracket; an auxiliary wheel mounted at an end of the turnover arm; and a push arm mechanism for pushing the flip arm to pivot around the fixed bracket so that the auxiliary wheel can be reciprocally switched between an extended position and a retracted position; wherein, the auxiliary wheel at the position of stretching out can avoid vehicle chassis to scratch with the domatic emergence. The auxiliary wheel device of the vehicle and the auxiliary wheel of the vehicle can be retracted in a non-use state, the external structure of the vehicle body is not required to be changed, the reduction of the production and manufacturing cost and the later maintenance and replacement cost is facilitated, and the influence on the trafficability and the overall modeling of the vehicle can be avoided.

Description

Auxiliary wheel device for vehicle and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a vehicle and an auxiliary wheel device of the vehicle.

Background

The front suspension distance or the rear suspension distance of the vehicle is longer, and when the road surface with larger gradient is used, the lower part of the front part of the vehicle or the lower part of the rear part of the vehicle is easy to scratch with the ground, so that the safety passing performance of the whole vehicle in climbing is reduced. Therefore, in the prior art, the auxiliary wheel is arranged at the forefront end or the rearmost end of the vehicle, and is firstly contacted with the slope surface when approaching a slope with a larger gradient, so that the situation that the front lower end or the rear lower end of the vehicle is firstly scratched with the slope surface is avoided, and the contact between the front or the rear of the vehicle and the ground is changed from sliding friction to rolling friction, thereby enhancing the passing performance of climbing the vehicle. However, the auxiliary wheels are fixedly arranged at the forefront end or the rearmost end of the vehicle, cannot be retracted, are not coordinated with the overall shape of the vehicle, and are not attractive.

Disclosure of Invention

The utility model aims to overcome the technical problems and provide a vehicle auxiliary wheel device and a vehicle, wherein the vehicle auxiliary wheel device and the auxiliary wheel of the vehicle can be retracted in a non-use state without changing the external structure of a vehicle body, which are beneficial to reducing the production and manufacturing cost and the later maintenance and replacement cost and avoiding influencing the overall modeling of the vehicle.

In order to achieve the above object, the present utility model provides a vehicle auxiliary wheel device comprising:

a fixed bracket for mounting to a body or subframe of a vehicle;

the turning arm is pivotally mounted on the fixed bracket;

an auxiliary wheel mounted at an end of the turnover arm; and

a push arm mechanism for pushing the flip arm to pivot around the fixed bracket so that the auxiliary wheel can be switched back and forth between an extended position and a retracted position; wherein, the auxiliary wheel at the position of stretching out can avoid vehicle chassis to scratch with the domatic emergence.

Optionally, the turnover arm includes with the rotatable pivot connecting portion of being connected of fixed bolster, be equipped with the locking breach on the outer periphery of pivot connecting portion, vehicle auxiliary wheel device still includes locking piece and locking arm, the first end of locking arm with the locking piece is connected, the second end of locking arm with pushing arm mechanism is connected pushing arm mechanism promotes the turnover arm rotates to when stretching out the position, pushing arm mechanism passes through the locking arm drives the locking piece inserts the locking breach, in order to restrict the turnover arm rotates.

Further, one end of the turnover arm far away from the auxiliary wheel can be provided with a waist-shaped hole, the pushing arm mechanism is a pushing rod mechanism and comprises a pushing rod outer cylinder and a pushing rod arranged in the pushing rod outer cylinder, the pushing end of the pushing rod is movably connected in the waist-shaped hole through a pushing rod rotating shaft, the pushing rod outer cylinder is rotatably connected with the fixed support, and the second end of the locking arm is connected with the pushing end of the pushing rod.

In addition, the fixing support can be provided with a guide groove with one end open, an elastic piece is arranged in the guide groove and is stopped between the locking block and the closed end of the guide groove, and the locking block is accommodated in the guide groove and can extend out of the opening part under the elastic action of the elastic piece.

Furthermore, the locking arm may be a cylindrical spring; and/or the pushing arm mechanism comprises one of a linear motor, an air cylinder and a hydraulic cylinder.

Alternatively, the utility model provides a vehicle comprising a vehicle auxiliary wheel device as described above, said vehicle auxiliary wheel device being mounted on a body or sub-frame of said vehicle.

Further, the auxiliary wheel device of the vehicle can be arranged at the front part of the vehicle body, in the extending position, an included angle formed by a tangent line led out from the outer edge of the auxiliary wheel to the outer edge of the front wheel of the vehicle and the ground is smaller than or equal to a first passing angle, and the first passing angle is an included angle formed by a tangent line led out from a protruding point at the lower end of the front part of the vehicle to the outer edge of the front wheel of the vehicle and the ground; or,

the auxiliary wheel device of the vehicle can be arranged at the rear part of the vehicle body, in the extending position, an included angle formed by a tangent line led out from the outer edge of the auxiliary wheel to the outer edge of the rear wheel of the vehicle and the ground is smaller than or equal to a second passing angle, and the second passing angle is an included angle formed by a tangent line led out from a protruding point at the lower end of the rear part of the vehicle to the outer edge of the rear wheel of the vehicle and the ground.

Further, in the retracted position, the outer edge height of the auxiliary wheel may be greater than or equal to the bottom edge height of the vehicle chassis.

In addition, the vehicle further includes a gradient detecting device for detecting a road surface gradient angle, and a control device in communication connection with the gradient detecting device and the push arm mechanism, respectively, the control device being configured to:

acquiring a road surface gradient angle detected by the gradient detection device;

determining that the road surface gradient angle is equal to or greater than the first passing angle or the second passing angle;

controlling the pushing arm mechanism to push the overturning arm to rotate so as to enable the auxiliary wheel to be switched from a retracted position to an extended position;

determining that the road surface gradient angle is less than the first or second passage angle;

the pushing arm mechanism is controlled to push the turnover arm to rotate so that the auxiliary wheel is kept at the retraction position.

Further, the vehicle may further include a vehicle speed detecting device for detecting a vehicle speed, the vehicle speed detecting device being in control communication with the control device, the control device being further configured to, when the gradient detecting device detects that the road surface gradient angle is equal to or greater than the first passing angle or the second passing angle:

acquiring the vehicle speed detected by the vehicle speed detection device;

determining that the vehicle speed is greater than a preset vehicle speed, and sending out a deceleration reminding instruction;

and when the vehicle speed is less than or equal to the preset vehicle speed, controlling the arm pushing mechanism to push the overturning arm to rotate so as to enable the auxiliary wheel to be switched from the retracted position to the extended position.

The auxiliary wheel device of the vehicle comprises the fixed bracket, the turning arm, the auxiliary wheel and the pushing arm mechanism, wherein the fixed bracket is used for installing the auxiliary wheel device of the vehicle on a vehicle body or an auxiliary frame of the vehicle, the external structure of the vehicle body is not required to be changed, and the influence on the overall modeling of the vehicle is avoided. The turning arm is pivotally mounted on the fixed bracket, the auxiliary wheel is mounted at the outer end part of the turning arm, and the pushing arm mechanism is used for pushing the turning arm to pivot around the fixed bracket, so that the auxiliary wheel can be switched back and forth between an extending position and a retracting position; wherein, the auxiliary wheel at the position of stretching out can avoid vehicle chassis to scratch with the domatic emergence. The auxiliary wheel device of the vehicle and the auxiliary wheel of the vehicle adopt a telescopic mechanism, and the auxiliary wheel stretches out when the auxiliary wheel accords with a use state and can be retracted when the auxiliary wheel is not in use, so that the trafficability of the auxiliary wheel device of the vehicle in a normal driving state is not influenced, and the appearance of the vehicle is not influenced. In addition, the auxiliary wheel device of the vehicle is arranged on the body or the auxiliary frame of the vehicle, the external structure of the body does not need to be changed, and the reduction of the production and manufacturing cost and the later maintenance and replacement cost is facilitated.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

FIG. 1 illustrates an exploded view of the installation of a vehicle auxiliary wheel device according to one embodiment of the present utility model;

FIG. 2 is an installation view of the auxiliary wheel apparatus of FIG. 1, wherein the pushrod rotational axis is located at position I;

FIG. 3 is an installation view of the auxiliary wheel apparatus of FIG. 1, wherein the pushrod rotational axis is located at position II;

FIG. 4 is a schematic illustration of the auxiliary wheel apparatus of the vehicle of FIG. 1 mounted on a vehicle with the auxiliary wheels in a retracted position;

FIG. 5 is a schematic illustration of the auxiliary wheel apparatus of the vehicle of FIG. 1 mounted on a vehicle with the auxiliary wheels in an extended position;

FIG. 6 is a schematic view of the auxiliary wheel device of FIG. 1 mounted on the front of a vehicle body;

fig. 7 is a control logic diagram of a vehicle auxiliary wheel device according to an embodiment of the present utility model.

Description of the reference numerals

100. Vehicle auxiliary wheel device 1 vehicle front wheel outer edge

2. First passing angle limiting line 3 ground line

4. Front bumper of auxiliary wheel 5

6. Bolt 7 fixing support

8. Elastic piece 9 locking block

10. Rotating pin 11 turnover arm rotating shaft

12. The swivel arm 13 assists the wheel axis

121. Locking notch of rotating shaft connecting part 122

14. Push rod shaft 15 push rod

16. Locking arm 17 push rod outer cylinder

18. Guide groove of push rod rotating shaft 71

123. Waist-shaped hole 1000 vehicle

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the positional relationship of the various components with respect to one another in the vertical, vertical or gravitational directions. The terms "front" and "rear" refer to the positional relationship of each part of the product with respect to the angle of use of the user, and the side closer to the user is "front" and the side farther from the user is "rear".

In the prior art, the condition of passing a slope with a larger gradient is inevitably encountered in the running process of a vehicle, so that the slope passing performance of the vehicle is enhanced in order to avoid scratch between the lower end of the vehicle or the lower end of the rear part of the vehicle and the slope under the condition, but the auxiliary wheel is fixedly arranged at the forefront end or the rearmost end of the vehicle and cannot be retracted, and the vehicle is not coordinated with the overall shape of the vehicle and is not attractive. In addition, auxiliary wheel fixed mounting is at vehicle front end or rearmost, needs the external structure of changing the automobile body, is unfavorable for manufacturing cost to reduce, and later maintenance replacement cost is also higher.

To this end, the present utility model provides a vehicle auxiliary wheel device, and the vehicle auxiliary wheel device 100 includes a fixed bracket 7, an overturning arm 12, an auxiliary wheel 4, and an arm pushing mechanism. The fixing bracket 7 is used for installing the auxiliary wheel device 100 on the body or the auxiliary frame of the vehicle 1000, so that the original external structure of the body is not required to be changed, the influence on the overall modeling of the vehicle is avoided, the large production and manufacturing cost is not required to be additionally increased, and the maintenance and replacement cost of the auxiliary wheel device 100 of the later-stage vehicle is also low. Furthermore, the flipping arm 12 is pivotally mounted on the fixed bracket 7, the auxiliary wheel 4 is mounted at the end of the flipping arm 12, and the pushing arm mechanism is used to push the flipping arm 12 to pivot around the fixed bracket 7, so that the auxiliary wheel 4 can be reciprocally switched between the extended position and the retracted position; wherein, the auxiliary wheel 4 at the extending position can avoid the scratch of the chassis and the slope surface of the vehicle. In this way, the auxiliary wheel device 100 and the auxiliary wheel 4 of the vehicle 1000 can be retracted in the non-use state, so that the passing performance in the normal driving state is not affected, the external structure of the vehicle body is not required to be changed, and the integral shape of the vehicle is more coordinated and attractive.

Specifically, in one embodiment shown in fig. 2 and 3, the fixing bracket 7 is provided with a plurality of bolt holes, and the vehicle auxiliary wheel device 100 mounts the fixing bracket 7 on the vehicle body or the auxiliary frame by bolts 6. As shown in fig. 6, the auxiliary wheel device 100 is fixed on the vehicle body or the auxiliary frame and is retracted, the auxiliary wheel device 100 is mounted on the vehicle body or the auxiliary frame through bolts, the auxiliary wheel device 100 can be selected and installed in advance when a new vehicle leaves the factory, mounting holes can be reserved in advance in the design stage, and the auxiliary wheel device is additionally mounted through a refitted part in the later stage, so that the external structure of the vehicle body is not required to be changed, the production and manufacturing cost is reduced, and the later maintenance and replacement cost is low.

In addition, the extension and retraction time of the auxiliary wheel device 100 can be adjusted, and various modes such as quick opening and slow opening can be realized. And can be installed on the head or the tail of the vehicle according to the requirement. The auxiliary wheel device 100 is mounted on the auxiliary frame or the vehicle body, and has strong mounting position strength and good impact resistance effect. The auxiliary wheel 4 is rotatably mounted at the outer end of the tilting arm 12, i.e. the auxiliary wheel 4 can rotate, so that the sliding friction can be changed into rolling friction, and the resistance in the running process of the vehicle can be reduced. The material of the auxiliary wheel 4 may be hard or soft such as rubber.

In the embodiment shown in fig. 2 and 3, the fixing bracket 7 includes a plurality of bolt holes, and the plurality of bolt holes are distributed. The invert arm 12 is approximately T-shaped and includes a web end and two wing ends on either side of the web end. The web end of the turning arm 12 is pivotally connected with one end of the fixed bracket 7, the first wing end of the turning arm 12 is rotatably connected with the auxiliary wheel 4 through the turning arm rotating shaft 11, the second wing end of the turning arm 12 is movably connected with the pushing arm mechanism, and thus the pushing arm mechanism can drive the auxiliary wheel 4 on the first wing end to rotate around the fixed bracket 7 by pushing the second wing end to enable the turning arm 12 to rotate around the pivotal connection part of the fixed bracket 7, and further can be switched back and forth between the extending position and the retracting position.

It should be noted that, the structure of the auxiliary wheel device 100 for a vehicle is not limited to the above structure, and any structure capable of realizing extension and retraction belongs to a technical scheme of variability, for example, the turning arm 12 is long-strip-shaped, one end of the turning arm is rotatably connected with the fixed bracket 7, the other end of the turning arm is rotatably connected with the auxiliary wheel 4, and the middle part of the turning arm 12 is movably connected with the pushing arm mechanism, so that the turning arm 12 can be pushed to rotate around the pivot connection part of the fixed bracket 7 by the pushing arm mechanism, thereby driving the auxiliary wheel 4 on the first wing end to rotate around the fixed bracket 7, and further being capable of switching reciprocally between the extension position and the retraction position.

Further, the turning arm 12 may include a rotating shaft connecting portion 121 rotatably connected to the fixed support 7, a locking notch 122 is provided on an outer periphery of the rotating shaft connecting portion 121, the vehicle auxiliary wheel device 100 further includes a locking block 9 and a locking arm 16, a first end of the locking arm 16 is connected to the locking block 9, a second end of the locking arm 16 is connected to a pushing arm mechanism, and when the pushing arm mechanism pushes the turning arm 12 to rotate to the extended position, the pushing arm mechanism drives the locking block 9 to insert into the locking notch 122 through the locking arm 16 so as to limit the turning arm 12 to rotate. That is, the auxiliary wheel device 100 for a vehicle is designed with an automatic locking device, the tilting arm 12 rotates around the tilting arm rotating shaft 11 through the rotating shaft connecting part 121, and a locking notch 122 is arranged on the outer periphery of the rotating shaft connecting part 121 for providing a mechanical locking effect after the auxiliary wheel 4 extends out, when the tilting arm 12 extends out in place, the tilting arm 12 can be automatically locked, and the impact on the ascending slope is prevented from damaging the driving device.

Specifically, as shown in fig. 1, 2 and 3, the web end of the turning arm 12 is rotatably connected with the fixed support 7 through the turning arm rotating shaft 11, a rotating shaft connecting portion 121 for sleeving on the turning arm rotating shaft 11 is formed at the web end of the turning arm 12, the rotating shaft connecting portion 121 is annular, a locking notch 122 is formed on the annular outer periphery, and the locking block 9 can be inserted into the locking notch 122 under the driving of the locking arm 16, so that the turning arm 12 is mechanically locked, and the rotation of the turning arm 12 is further limited. Wherein a first end of the locking arm 16 is connected to the locking block 9 and a second end of the locking arm 16 is connected to a lockable arm drive structure. Alternatively, the locking arm driving structure may be a push arm mechanism, that is, the second end of the locking arm 16 is connected to the push arm mechanism, so that the driving structure is reduced by linking with the push arm mechanism, so that the overall structure of the auxiliary wheel device 100 of the vehicle is optimized, and the manufacturing cost is also greatly saved.

Further, a waist-shaped hole 123 can be formed in one end, far away from the auxiliary wheel 4, of the turning arm 12, the pushing arm mechanism is a push rod mechanism and comprises a push rod outer barrel 17 and a push rod 15 arranged in the push rod outer barrel 17, the pushing end of the push rod 15 is movably connected in the waist-shaped hole 123 through a push rod rotating shaft 14, the push rod outer barrel 17 is rotatably connected with the fixed support 7, and the second end of the locking arm 16 is connected to the pushing end of the push rod 15. The driving device of the pushing arm mechanism can be realized by adopting a linear motor, an air cylinder, a hydraulic cylinder and the like.

As shown in fig. 1, 2 and 3, the second wing end of the turning arm 12 is provided with a waist-shaped hole 123, the waist-shaped hole 123 is a oblong hole, and the push arm mechanism is a push rod mechanism and includes a push rod outer cylinder 17 and a push rod 15 provided in the push rod outer cylinder 17, the push rod 15 being movable in the outer cylinder 17 in the axial direction. The pushing end of the push rod 15 is movably connected in the waist-shaped hole 123 through the push rod rotating shaft 14, and the push rod outer cylinder 17 is rotatably connected with the fixed bracket 7 through the push rod rotating shaft 18.

In the extending process, the push rod 15 extends axially outwards, the push rod 15 extends outwards through the push rod rotating shaft 14 against the outer circumferential end (position i) of the waist-shaped hole 123 of the turning arm 12, the turning arm 12 rotates anticlockwise along the turning arm rotating shaft 11, the locking block 9 is pulled by the push rod 15 with the locking arm 16 to move towards the locking notch 122 of the rotating shaft connecting part 121, the locking block 9 is driven to enter the notch at the rotating shaft of the turning arm 7, and limiting locking is completed, and at this time, the opening action of the vehicle auxiliary wheel device 100 is completed. It should be noted that, the outer round end is an end of the waist-shaped hole 123 relatively far from the push rod 15, and the inner round end is an end of the waist-shaped hole 123 relatively close to the push rod 15.

In the vehicle auxiliary wheel device 100 shown in fig. 3, in the retraction process, since the turning arm 7 is locked by the locking block 9 at first, when the turning arm 15 is retracted axially inwards, the turning arm 7 does not act, the turning arm 15 drives the turning arm shaft 14 to move along the waist-shaped hole 123 of the turning arm 12 to the inner circular end (position ii) of the waist-shaped hole 123 first, at this time, the locking block 9 is pulled back by the locking arm 16, the locking state is released, then the turning arm 15 continues to move axially in the outer cylinder 17, the turning arm 15 is retracted inwards by pulling the inner circular part (position ii) of the waist-shaped hole 123 of the turning arm 12 by the turning arm shaft 14, the turning arm 12 rotates clockwise along the turning arm rotation shaft 11, and at this time, the whole auxiliary wheel device completes the retraction action.

Alternatively, the fixing bracket 7 may be provided with a guide groove 71 with one end open, the other end of the guide groove 71 is a closed end, the guide groove 71 is a straight rail groove and the extending direction is consistent with the moving direction of the push rod 15. The locking block 9 is rotatably connected with the locking arm 16 through the rotation pin 10, an elastic member 8 is provided in the guide groove 71, the elastic member 8 is stopped between the locking block 9 and the closed end of the guide groove 71, and the locking block 9 is accommodated in the guide groove 71 and can be extended from the opening portion under the elastic action of the elastic member 8 to be inserted into the locking notch 122. The locking arm 16 may be a cylindrical spring, the elastic member 8 may be a leaf spring, and the guide groove 71 is provided with a protruding cylinder for providing a rotation limiting effect for the leaf spring. Specifically, as shown in fig. 1, 2 and 3, the fixed bracket 7 is provided with a guide groove 71, a locking block 9 is installed in the guide groove 71, a hole is formed in the locking block 9, a rotating pin 10 is fixed on the locking block, one end of a locking arm 16 is inserted into the rotating pin 10, the other end is inserted into an installation hole of a push rod 15, an elastic piece 8 is installed on the fixed bracket 7, one end of the elastic piece is propped against the tail of the locking block 10, and the other end of the elastic piece is propped against the tail of the guide groove 71 of the fixed bracket 7.

Wherein, in the process of extending the auxiliary wheel 4, the push rod 15 extends outwards along the axial direction, the push rod 15 extends outwards along the outer circular end (position i) of the waist-shaped hole 123 of the turnover arm 12 through the push rod rotating shaft 14, the turnover arm 12 rotates anticlockwise along the turnover arm rotating shaft 11, the rotating pin 10 and the locking block 9 are pulled to move along the guide groove 71 of the fixed bracket 7 through the push rod 15 with the locking arm 16, the locking block 9 is driven to enter the locking notch 122 of the turnover arm 7, limiting locking is completed, and at the moment, the auxiliary wheel device 100 of the vehicle completes opening action. In the retraction process of the auxiliary wheel 4, the push rod 15 drives the push rod rotating shaft 14 to move to the inner circular end (position II) of the waist-shaped hole 123 of the turnover arm 12 along the waist-shaped hole 123, at this time, the locking block 9 is pulled back by the locking arm 16 along the guide groove 71 of the fixed support 7, because the locking arm 16 is a cylindrical spring, the elasticity of the locking arm is greater than that of the elastic piece 8 (the sheet spring), the elastic piece 8 (the sheet spring) is compressed, then the push rod 15 continues to move axially in the outer cylinder 17, the push rod 15 pulls the inner circular part (position II) of the waist-shaped hole 123 of the turnover arm 12 to retract inwards through the push rod rotating shaft 14, the turnover arm 12 rotates clockwise along the turnover arm rotating shaft 11, and at this time, the whole auxiliary wheel device completes the retraction action.

Further, the present utility model also provides a vehicle 1000, the vehicle 1000 includes the vehicle auxiliary wheel device 100, and the vehicle auxiliary wheel device 100 is mounted on a vehicle body or a subframe of the vehicle 1000.

Optionally, the auxiliary wheel device 100 is disposed at the front part of the vehicle body, and in the extended position, an included angle formed by a tangent line drawn from the outer edge of the auxiliary wheel 4 to the outer edge of the front wheel of the vehicle and the ground is smaller than or equal to a first passing angle, where the first passing angle is an included angle formed by a tangent line drawn from a protruding point at the lower end of the front part of the vehicle body to the outer edge of the front wheel of the vehicle and the ground. Therefore, when the vehicle passes through a slope with a larger gradient, the auxiliary wheel 4 is contacted with the slope surface at first, so that the situation that the lower end of the front part of the vehicle is scratched with the slope surface at first is avoided, and the contact between the front part of the vehicle and the ground is changed into rolling friction from sliding friction, so that the trafficability of the vehicle to climb the slope is enhanced.

Alternatively, the auxiliary wheel device 100 is disposed at the rear of the vehicle body, and in the extended position, an angle formed by a tangent line drawn from the outer edge of the auxiliary wheel to the outer edge of the rear wheel of the vehicle and the ground is smaller than or equal to a second passing angle, which is an angle formed by a tangent line drawn from a protruding point at the lower end of the rear end of the vehicle body to the outer edge of the rear wheel of the vehicle and the ground. Therefore, when the vehicle passes through a slope with a larger gradient, the auxiliary wheel 4 is contacted with the slope surface at first, so that the situation that the lower end of the rear part of the vehicle is scratched with the slope surface at first is avoided, and the contact between the rear part of the vehicle and the ground is changed from sliding friction to rolling friction, so that the trafficability of the vehicle to climb the slope is enhanced.

In addition, the outer rim height of the auxiliary wheel 4 is higher than or equal to the bottom rim height of the vehicle chassis. In this way, the vehicle auxiliary wheel device 100 and the auxiliary wheel 4 of the vehicle 1000 do not affect the passing performance in the normal driving state when retracted in the non-use state.

In addition, the vehicle may further include a gradient detecting device for detecting a gradient angle of the road surface, and a control device, the gradient detecting device may be a range radar detecting device, an ultrasonic detecting device, or the like. The control device is respectively in communication connection with the gradient detection device and the pushing arm mechanism, and is configured to:

acquiring a road surface gradient angle detected by the gradient detection device;

determining that the road surface gradient angle is greater than or equal to the first passing angle or the second passing angle;

controlling the pushing arm mechanism to push the turning arm 12 to rotate so that the auxiliary wheel 4 is switched from the retracted position to the extended position;

determining that the road surface gradient angle is smaller than the first passing angle or the second passing angle;

the push arm mechanism is controlled to push the flip arm 12 to rotate so that the auxiliary wheel 4 remains in the retracted position ii.

As shown in fig. 4, 1 is a tire boundary, 2 is a first passing angle restriction line, 3 is a ground line 5 is a front bumper. The auxiliary wheel device 100 of the vehicle is retracted and positioned in the front bumper 5 in the normal running process, the trafficability and the appearance of the whole vehicle are not affected, at the moment, the first passing angle of the vehicle is A, namely, the slope with the gradient smaller than A in the advancing process is adopted, when the front gradient detection device detects that the gradient angle is smaller than the first passing angle A, the vehicle is in a normal running state, the auxiliary wheel device 100 of the vehicle does not execute the extending action, and the auxiliary wheel 4 is in a retracting state.

As shown in fig. 5, the auxiliary wheel device is in an open state, when the gradient of the road surface is greater than a and less than B (angle B is greater than a), the auxiliary wheel 4 firstly contacts the road surface to provide support for the front part of the vehicle during running, the auxiliary wheel 4 can rotate, sliding friction is changed into rolling friction, and the functions of protecting the front bumper 5 from being scratched and improving the passing performance can be achieved. Thus, the auxiliary wheel device of the vehicle can be automatically opened and contracted.

Further, the vehicle further includes a vehicle speed detection device for detecting a vehicle speed, the vehicle speed detection device being in control communication with the control device, the control device being further configured to, when the gradient detection device detects that the road surface gradient angle is equal to or greater than the first passage angle or the second passage angle:

acquiring the vehicle speed detected by a vehicle speed detection device;

determining that the vehicle speed is greater than a preset vehicle speed, and sending out a deceleration reminding instruction;

when the vehicle speed is determined to be equal to or less than the preset vehicle speed, the push arm mechanism is controlled to push the turning arm 12 to rotate so that the auxiliary wheel 4 is switched from the retracted position to the extended position.

Fig. 7 is a control logic of the whole auxiliary wheel device, when the vehicle normally advances, the front distance radar on the front bumper 5 detects that the gradient angle is smaller than the first passing angle a, the auxiliary wheel is retracted, the vehicle is in a normal running state, the auxiliary wheel device does not execute the extending action, the vehicle can normally pass through a slope, and when the current distance radar detects that the gradient angle is larger than the first passing angle a and smaller than the approach angle limit B, the vehicle machine judges whether the vehicle speed is smaller than or equal to a preset vehicle speed at the moment, if the vehicle speed is smaller than or equal to the preset vehicle speed, the auxiliary wheel automatically extends, the auxiliary vehicle automatically retracts after passing through the slope, if the vehicle speed is larger than the preset vehicle speed, the driver is reminded of needing to decelerate, and when the vehicle speed is reduced to be smaller than or equal to the preset vehicle speed, the auxiliary wheel automatically extends, and the auxiliary vehicle automatically retracts after passing through the slope. Wherein the preset vehicle speed may be set to 5km/h.

The above description is that the auxiliary wheel device 100 for vehicle and the vehicle 1000 for improving passing performance are installed on the vehicle body or the auxiliary frame through reasonable structures, and can automatically control the auxiliary wheel device to extend on the premise of meeting the use requirement when needed, so as to assist the vehicle to pass through a slope; when not in use or after passing through a slope, the device can automatically control the retraction of the vehicle, and the device does not influence the normal passing and the appearance of the vehicle.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model.

In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.

Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

Claims (10)

1. A vehicle auxiliary wheel device, characterized in that the vehicle auxiliary wheel device (100) comprises:

a fixed bracket (7) for mounting to a body or subframe of a vehicle (1000);

a flip arm (12) pivotally mounted on the fixed bracket (7);

an auxiliary wheel (4) mounted to an end of the flip arm (12); and

a push arm mechanism for pushing the flip arm (12) to pivot around the fixed bracket (7) so that the auxiliary wheel (4) can be reciprocally switched between an extended position and a retracted position; wherein, the auxiliary wheel (4) at the extending position can avoid the scratch of the vehicle chassis and the slope.

2. The vehicle auxiliary wheel device according to claim 1, wherein the turning arm (12) comprises a rotating shaft connecting part (121) rotatably connected with the fixed bracket (7), a locking notch (122) is formed in the outer periphery of the rotating shaft connecting part (121), the vehicle auxiliary wheel device (100) further comprises a locking block (9) and a locking arm (16), a first end of the locking arm (16) is connected with the locking block (9), a second end of the locking arm (16) is connected with the pushing arm mechanism, and when the pushing arm mechanism pushes the turning arm (12) to rotate to the extending position, the pushing arm mechanism drives the locking block (9) to be inserted into the locking notch (122) through the locking arm (16) so as to limit the turning arm (12) to rotate.

3. The auxiliary wheel device for the vehicle according to claim 2, wherein one end of the turnover arm (12) far away from the auxiliary wheel (4) is provided with a waist-shaped hole (123), the push arm mechanism is a push rod mechanism and comprises a push rod outer cylinder (17) and a push rod (15) arranged in the push rod outer cylinder (17), the push end of the push rod (15) is movably connected in the waist-shaped hole (123) through a push rod rotating shaft (14), the push rod outer cylinder (17) is rotatably connected with the fixed support (7), and the second end of the locking arm (16) is connected with the push end of the push rod (15).

4. The auxiliary wheel device for vehicles according to claim 2, characterized in that the fixing bracket (7) is provided with a guide groove (71) with one end open, an elastic member (8) is arranged in the guide groove (71), the elastic member (8) is stopped between the locking block (9) and the closed end of the guide groove (71), and the locking block (9) is accommodated in the guide groove (71) and can be extended from the opening part under the elastic action of the elastic member (8).

5. The vehicle auxiliary wheel device according to claim 2, characterized in that the locking arm (16) is a cylindrical spring; and/or the pushing arm mechanism comprises one of a linear motor, an air cylinder and a hydraulic cylinder.

6. A vehicle, characterized in that the vehicle (1000) comprises a vehicle auxiliary wheel device (100) according to any one of claims 1 to 5, the vehicle auxiliary wheel device (100) being mounted on a body or subframe of the vehicle (1000).

7. The vehicle of claim 6, wherein the vehicle is further characterized by,

the auxiliary wheel device (100) is arranged at the front part of the vehicle body, and in the extending position, an included angle formed by a tangent line led out from the outer edge of the auxiliary wheel (4) to the outer edge of the front wheel of the vehicle and the ground is smaller than or equal to a first passing angle, wherein the first passing angle is an included angle formed by a tangent line led out from a protruding point at the lower end of the front part of the vehicle to the outer edge of the front wheel of the vehicle and the ground; or,

the auxiliary wheel device (100) is arranged at the rear part of the vehicle body, in the extending position, an included angle formed by a tangent line led out from the outer edge of the auxiliary wheel to the outer edge of the rear wheel of the vehicle and the ground is smaller than or equal to a second passing angle, and the second passing angle is an included angle formed by a tangent line led out from a protruding point at the lower end of the rear part of the vehicle to the outer edge of the rear wheel of the vehicle and the ground.

8. Vehicle according to claim 7, characterized in that in the retracted position the outer rim of the auxiliary wheel (4) is higher than or equal to the bottom rim of the vehicle chassis.

9. The vehicle according to claim 7 or 8, further comprising a gradient detecting device for detecting a road surface gradient angle, and a control device in communication with the gradient detecting device and the push arm mechanism, respectively, the control device being configured to:

acquiring a road surface gradient angle detected by the gradient detection device;

determining that the road surface gradient angle is equal to or greater than the first passing angle or the second passing angle;

controlling the pushing arm mechanism to push the overturning arm (12) to rotate so as to enable the auxiliary wheel (4) to be switched from a retracted position to an extended position;

determining that the road surface gradient angle is less than the first or second passage angle;

the pushing arm mechanism is controlled to push the overturning arm (12) to rotate so that the auxiliary wheel (4) is kept at the retraction position.

10. The vehicle of claim 9, further comprising a vehicle speed detection device for detecting a vehicle speed, the vehicle speed detection device in control communication with the control device, the control device further configured to, upon the slope detection device detecting that the road slope angle is equal to or greater than the first or second passage angle:

acquiring the vehicle speed detected by the vehicle speed detection device;

determining that the vehicle speed is greater than a preset vehicle speed, and sending out a deceleration reminding instruction;

when the vehicle speed is less than or equal to a preset vehicle speed, the pushing arm mechanism is controlled to push the overturning arm (12) to rotate so that the auxiliary wheel (4) is switched from a retracted position to an extended position.