A four-way shuttle car lifting wheel suspension assembly and a four-way shuttle car

Abstract

The present invention discloses a lifting wheel suspension assembly of a four-way shuttle vehicle and a four-way shuttle vehicle. The suspension assembly includes a wheel and a rotating shaft assembly connected to a wheel shaft on the wheel. An elevating mechanism for driving the wheel to lift and lower and a shock absorber for reducing the vibration of the shuttle vehicle caused by the undulation of the track during the running of the wheel are connected to the wheel shaft. The elevating mechanism is provided with an elevating component connected to the upper end of the shock absorber, and a first stroke limiting mechanism for forming an adjustable height range of the shock absorber is arranged at the elevating component. The present invention divides the adjustable height range of the shock absorber and the wheel lifting height range through the adjustable height range of the shock absorber formed by the first stroke limiting mechanism, so that the same elevating mechanism can be used to adjust the shock absorber and lift the wheel, simplify the equipment structure, limit the occupied space of the equipment, and realize the shock absorption and commutation operations of the four-way shuttle vehicle within a limited space range.

Description

Technical Field

[0001] The present invention relates to the technical field of four-way shuttle vehicles, and particularly relates to a lifting wheel suspension assembly for a four-way shuttle vehicle and a four-way shuttle vehicle. Background Art

[0002] A four-way shuttle vehicle is a small vehicle that realizes four-way driving by changing the landing condition of the wheels on both sides, that is, the small vehicle can move in two directions, namely the x-channel and the y-channel of the shelf. The specific method is that when the wheels on the x-track are on the ground and the wheels on the y-track are suspended, it is the x-channel mode. At this time, the shuttle vehicle can travel on the x-channel. When the wheels on the y-track are on the ground and the wheels on the x-track are suspended, it is the y-channel mode. At this time, the shuttle vehicle can travel on the y-channel, realizing the commutation function of the shuttle vehicle.

[0003] Since in the field of vertical warehouse shuttle vehicles, the volume of the small vehicle is limited. Therefore, in the prior art, since a wheel lifting mechanism needs to be provided for the four-way shuttle vehicle, there is no space to provide a vibration damping mechanism for the wheels. Therefore, the wheels of the small vehicle are generally set as rubber-tyred wheels, and the vibration of the small vehicle is reduced by the rubber wheels, reducing the impact between the small vehicle and the vertical warehouse. However, the damping effect of the rubber-tyred wheels is not ideal. Therefore, there is an urgent need for a suspension mechanism applied to a four-way shuttle vehicle to realize the damping and lifting of the wheels of the four-way shuttle vehicle. Summary of the Invention

[0004] Technical Objective: Aiming at the deficiencies of the existing shuttle vehicles described above, the present invention discloses a lifting wheel suspension assembly for a four-way shuttle vehicle and a four-way shuttle vehicle that can simultaneously realize wheel lifting and damping in a limited space.

[0005] Technical Solution: To achieve the above technical objective, the present invention adopts the following technical solution:

[0006] A lifting wheel suspension assembly for a four-way shuttle vehicle includes a wheel and a rotating shaft assembly connected to the wheel shaft on the wheel to drive the wheel to rotate. An elevating mechanism for driving the wheel to lift and lower when the four-way shuttle vehicle switches the moving direction is connected to the wheel shaft, and a shock absorber for reducing the vibration of the shuttle vehicle caused by the undulation of the track when the wheel is traveling. The elevating mechanism is provided with an elevating component connected to the upper end of the shock absorber. The lower end of the shock absorber is rotationally and cooperatively connected to the wheel shaft through a connecting component. During the lifting and lowering stroke of the elevating mechanism, the lifting height is divided into a shock absorber adjustment height interval and a wheel lifting height interval located above the shock absorber adjustment height interval; a first stroke limiting mechanism for forming the shock absorber adjustment height interval is provided at the elevating component; the first stroke limiting mechanism is connected to the wheel shaft. When the rising height of the elevating component reaches the upper end point of the height interval limited by the first stroke limiting mechanism, the continuous rising of the elevating component will drive the wheel shaft to rise synchronously through the first stroke limiting mechanism to lift the wheel.

[0007] Preferably, the first stroke limiting mechanism of the present invention has an upper boundary and a lower boundary along the moving direction of the driving end of the lifting mechanism. When adjusting the shock absorption capacity of the shock absorber, the lifting mechanism drives the upper end of the shock absorber to move within the boundary range of the first stroke limiting mechanism.

[0008] Preferably, the first stroke limiting mechanism of the present invention includes a wheel carrier back plate arranged parallel to the moving direction of the lifting component. The lower part of the wheel carrier back plate is connected to the connecting component on the wheel axle. A limiting hole is provided on the wheel carrier back plate, and the upper and lower boundary positions of the shock absorber adjustment height range are defined by the opening position and size of the limiting hole.

[0009] Preferably, an elastic buffer mechanism is provided at the lower end of the limiting hole of the wheel carrier back plate of the present invention. The elastic buffer mechanism is fixed on the wheel carrier back plate, and the elastic end abuts against the lifting component. A fixing plate for restricting the lower end position of the wheel carrier back plate is provided at the lower end of the wheel carrier back plate. When the lifting component moves up and down within the height range where the limiting hole is located, the downward elastic force is applied through the elastic buffer mechanism to keep the wheel carrier back plate in contact with the fixing plate and buffer the movement of the lifting component.

[0010] Preferably, the elastic buffer mechanism of the present invention includes a buffer fixing block fixedly arranged on the wheel carrier back plate. A guide rod is provided at one end of the buffer fixing block close to the lifting component. The guide rod is inserted into the lifting component, and a buffer spring is sleeved on the guide rod. The end parts of the buffer spring respectively abut against the buffer fixing block and the end face of the lifting component.

[0011] Preferably, the connecting component of the present invention is rotatably connected to the wheel carrier back plate. When the wheel undulates up and down under the action of the track, the connecting component rotates relative to the wheel carrier back plate along the rotation axis, driving the lower end of the shock absorber to move to perform shock absorption of the four-way shuttle car.

[0012] Preferably, a second stroke limiting mechanism for restricting the maximum deformation length of the shock absorber is provided between the lifting component and the connecting component of the present invention. The maximum stroke of the second stroke limiting mechanism is consistent with the maximum limiting stroke of the limiting hole. When the lifting component enters the wheel lifting height range, the second stroke limiting mechanism assists in lifting the wheel.

[0013] Preferably, the second stroke limiting mechanism of the present invention includes a limiting link and a rotating wheel. The rotating wheel is rotatably arranged on the lifting component. One end of the limiting link is connected to the wheel disc of the rotating wheel through a pin shaft, and the other end is hinged to the connecting component. When the lifting component reaches the upper boundary of the limiting hole, the connecting line between the hinge center of the limiting link on the connecting component and the rotation center of the rotating wheel and the rod body of the limiting link are in the same straight line, and the distance between the lifting component and the connecting component reaches the maximum.

[0014] Preferably, the connecting component of the present invention includes a bushing sleeved on the wheel axle and a connecting block connecting the bushing and the shock absorber. One end of the connecting block close to the wheel carrier back plate is rotatably connected to the wheel carrier back plate, and the rotation axis is consistent with the axis direction of the wheel axle. A groove for installing the end of the shock absorber is formed on the connecting block, and the end of the shock absorber is embedded in the groove and rotatably connected to the wall surface of the groove through a pin shaft.

[0015] Preferably, the lifting mechanism of the present invention includes an electric cylinder and a slider connecting the driving end of the electric cylinder and the lifting component. The upper end of the shock absorber is rotatably connected to the lifting component through a pin shaft.

[0016] Preferably, an installation groove matching with the upper end of the shock absorber is formed on the lifting component of the present invention. The symmetric center line in the vertical direction of the installation groove and the axis of the electric cylinder are in the same vertical plane. The end of the shock absorber is located in the installation groove and is connected to the wall surface of the installation groove through a pin shaft.

[0017] Preferably, the electric cylinder of the present invention is fixed through a mounting plate, and a guide plate is arranged on the mounting plate along the sliding direction of the slider.

[0018] Preferably, the rotating shaft assembly of the present invention includes a transmission shaft and a connecting shaft. A fixing piece for integrally fixing the suspension assembly on the vehicle body is arranged on the transmission shaft, and the connecting shaft connects the transmission shaft and the wheel axle of the corresponding wheel.

[0019] Preferably, the connecting shaft of the present invention adopts a universal joint shaft. Both ends of the universal joint shaft are connected to the transmission shaft and the wheel axle through shaft heads. The shaft head at least at one end is slidably and cooperatively connected to the shaft body through splines. When the wheel is driven by the lifting mechanism to rise and fall, the universal joint shaft correspondingly expands and contracts to change its length to adapt to the distance change between the end of the wheel axle and the end of the transmission shaft.

[0020] The present invention also provides a four-way shuttle car, which uses the above-mentioned four-way shuttle car to lift the wheel suspension assembly. Among the wheels in two mutually perpendicular directions of the four-way shuttle car, at least one direction of the wheels uses the lifting wheel suspension assembly to perform height switching of the corresponding direction wheels, change the relative height of the wheels in the two directions, and perform switching of the moving direction of the four-way shuttle car.

[0021] Beneficial effects: A four-way shuttle car lifting wheel suspension assembly and a four-way shuttle car disclosed by the present invention have the following beneficial effects:

[0022] 1. The driving end of the lifting mechanism of the present invention is connected to the shock absorber through a lifting component, which can reduce the height space occupied by the overall lifting structure. The first stroke limiting mechanism adjusts the height range of the shock absorber to demarcate the height range of the shock absorber adjustment and the height range of the wheel lift, so that the same lifting mechanism can be used to realize the shock absorption adjustment of the shock absorber and the lifting operation of the wheel, simplify the equipment structure, and further limit the occupied space of the equipment, and realize the shock absorption and commutation operations of the four-way shuttle vehicle within a limited space range.

[0023] 2. The first stroke limiting mechanism of the present invention is connected to the wheel shaft, and the driving end of the lifting mechanism performs shock absorption adjustment of the shock absorber within the upper and lower boundaries of the first stroke limiting mechanism, so as to utilize the mechanical limit structure to limit the adjustment range of the shock absorber. At the same time, the deformation range of the shock absorber can be controlled, so as to avoid damage to the shock absorber caused by excessive deformation and affect the shock absorption performance of the shock absorber.

[0024] 3. The first stroke limiting mechanism of the present invention defines the upper and lower boundaries of the height adjustment range of the shock absorber through the wheel carrier back plate with a limiting hole. The plate structure can reduce the occupied space, and at the same time, the boundaries are adjusted through the size of the limiting hole opened, without a complex adjustment structure and can ensure the reliability of the limit.

[0025] 4. An elastic buffer mechanism is arranged on the wheel carrier back plate of the present invention. Through the elastic buffer mechanism, the adjustment amplitude of the shock absorber can be buffered to avoid directly impacting the structure through the action of the electric cylinder; the elastic buffer mechanism can also generate a downward acting force on the wheel carrier back plate, so that during the normal operation of the shock absorber, the position of the wheel carrier back plate remains stable and avoids vibrating up and down with the wheel.

[0026] 5. The elastic buffer mechanism of the present invention is guided in cooperation with the lifting component through a guide rod, which can avoid the deviation between the axis of the lifting component and the shock absorber, affecting the transmission of the acting force of the electric cylinder on the shock absorber.

[0027] 6. The present invention limits the maximum deformation length of the shock absorber through the second stroke mechanism, so that when the wheel is lifted, the second stroke limiting mechanism is used to assist in lifting the wheel, avoiding the relative downward rotation of the connecting component with respect to the wheel carrier back plate under the action of the wheel gravity, affecting the lifting height of the wheel and increasing the required height space for lifting.

[0028] 7. The connecting shaft of the present invention adopts a universal joint, which can rotate relative to the transmission shaft. The transmission shaft is relatively fixed to the shuttle vehicle in the height direction. When the wheel is lifted, through the telescopic movement of the connecting shaft, the wheel provides the displacement amount of lifting or bouncing, reducing the lifting load of the wheel, thereby reducing the required equipment power, and realizing the shock absorption and lifting of the wheel within the limited installation space of the four-way shuttle vehicle. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0030] Figure 1 It is the overall structure diagram of the lifting wheel suspension assembly of the present invention;

[0031] Figure 2 For the present invention along Figure 1 Partial enlarged view of area A in;

[0032] Figure 3 It is the structure diagram of the elastic buffer mechanism of the present invention

[0033] Wherein, 1 - wheel, 2 - wheel shaft, 3 - lifting mechanism, 4 - shock absorber, 5 - lifting component, 6 - connecting component, 7 - wheel frame back plate, 8 - limiting hole, 9 - fixing plate, 10 - buffer fixing block, 11 - guide rod, 12 - buffer spring, 13 - limiting connecting rod, 14 - rotating wheel, 15 - connecting shaft sleeve, 16 - connecting block, 17 - groove, 18 - electric cylinder, 19 - slider, 20 - installation groove, 21 - installation plate, 22 - guide plate, 23 - transmission shaft, 24 - connecting shaft, 25 - fixing piece, 26 - shaft head, 27 - shaft body. Detailed implementation manners

[0034] Now, reference will be made in detail to the embodiments of the present disclosure, one or more examples of which are set forth below. Each embodiment and example is provided by way of explanation of the devices, components, and materials of the present disclosure, and not by way of limitation. On the contrary, the following description provides a convenient illustration for implementing the exemplary embodiments of the present disclosure. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made within the teachings of the present disclosure without departing from the scope or spirit thereof. For example, features shown or described as part of one embodiment can be combined with another embodiment to yield yet another embodiment. It is intended that the present disclosure cover such modifications and variations that fall within the scope of the appended claims and their equivalents. Other objects, features, and aspects of the present disclosure are disclosed or are apparent from the following detailed description. It is to be understood by those of ordinary skill in the art that this discussion is only a description of exemplary embodiments and is not intended to limit the broader aspects of the present disclosure.

[0035] Such as Figure 1 And Figure 2As shown in the figure, the present invention discloses a lifting wheel suspension assembly for a four-way shuttle vehicle, which includes a wheel 1 and a rotating shaft assembly connected to a wheel shaft 2 on the wheel 1 to drive the wheel 1 to rotate. An elevating mechanism 3 for driving the wheel 1 to lift and lower when the four-way shuttle vehicle switches its moving direction and a shock absorber 4 for reducing the vibration of the shuttle vehicle caused by the undulation of the track during wheel travel are connected to the wheel shaft 2. The elevating mechanism 3 is provided with an elevating component 5 connected to the upper end of the shock absorber 4, and the lower end of the shock absorber 4 is rotationally and cooperatively connected to the wheel shaft 2 through a connecting component 6. The shock absorption capacity adjustment of the shock absorber 4 and the lifting of the wheel 1 can both be achieved by the action of the same elevating mechanism 3. Thus, in the case of limited installation space of the shuttle vehicle, the setting of shock absorption and lifting equipment can be realized. At the same time, the suspension assembly of the lifting wheel of the present application is not limited to the specific technical field of four-way shuttle vehicles and can also be applied to other scenarios where wheel lifting and shock absorption of the wheel are required during the running process.

[0036] Within the lifting stroke of the elevating mechanism 3 of the present invention, the lifting height is divided into a shock absorber adjustment height interval and a wheel lifting height interval located above the shock absorber adjustment height interval. A first stroke limiting mechanism for forming the shock absorber adjustment height interval is provided at the elevating component 5. The first stroke limiting mechanism has an upper boundary and a lower boundary along the moving direction of the driving end of the elevating mechanism. When adjusting the shock absorption capacity of the shock absorber, the elevating mechanism 3 drives the upper end of the shock absorber 4 to move within the boundary range of the first stroke limiting mechanism. The first stroke limiting mechanism is connected to the wheel shaft 2. When the rising height of the elevating component 6 reaches the upper endpoint of the height interval limited by the first stroke limiting mechanism, the continuous rising of the elevating component 6 will drive the wheel shaft 2 to rise synchronously through the first stroke limiting mechanism to lift the wheel 1. Through the provided first stroke limiting mechanism, the shock absorption adjustment range of the shock absorber can be controlled, and at the same time, the problem that directly lifting the wheel through the shock absorber 4 results in low controllable accuracy of the lifting height and is prone to damage the shock absorber itself and affect the shock absorption performance can be avoided. In a specific embodiment, the first stroke limiting mechanism of the present invention includes a wheel frame back plate 7 arranged parallel to the moving direction of the elevating component 5. The lower part of the wheel frame back plate 7 is connected to the connecting component 6 on the wheel shaft 2. A limiting hole 8 is opened on the wheel frame back plate 7, and the positions of the upper and lower boundaries of the shock absorber adjustment height interval are defined by the opening position and size of the limiting hole 8. The wheel frame back plate 7 is a plate-like structure as a whole to reduce the occupied space. At the same time, for facilitating the transmission of the acting force of the elevating component 5, a horizontal protrusion can be provided at the upper boundary of the limiting hole 8 on the wheel frame back plate 7 to increase the contact area with the elevating component 5 and better transmit the lifting force to ensure the smoothness of the wheel 1 during the lifting process.

[0037] The lower end of the wheel carrier back plate 7 is connected to the wheel axle 2 through the connecting component 6. When the lower end of the shock absorber 4 is driven by the wheel axle 2 to move up and down for shock absorption due to the influence of the track, the wheel carrier back plate 7 will move up and down synchronously under the action of the connecting component 6, thereby increasing the load of the shock absorber 4. Therefore, in the present invention, the connecting component 6 is rotatably connected to the wheel carrier back plate 7. When the wheel 1 undulates up and down under the action of the track, the connecting component 6 rotates relative to the wheel carrier back plate 7 along the rotation axis, driving the lower end of the shock absorber 4 to move, for shock absorption of the four-way shuttle vehicle; an elastic buffer mechanism is arranged at the lower end of the limiting hole 8 of the wheel carrier back plate 7. The elastic buffer mechanism is fixed on the wheel carrier back plate 7, and the elastic end abuts against the lifting component 5. A fixing plate 9 for limiting the lower end position of the wheel carrier back plate 7 is arranged at the lower end of the wheel carrier back plate 7. When the lifting component 5 moves up and down within the height range where the limiting hole 8 is located, a downward elastic force is applied through the elastic buffer mechanism to keep the wheel carrier back plate 7 in contact with the fixing plate 9 and buffer the movement of the lifting component 5; in a specific embodiment, the elastic buffer mechanism of the present invention includes a buffer fixing block 10 fixedly arranged on the wheel carrier back plate 7. A guide rod 11 is arranged at one end of the buffer fixing block 10 close to the lifting component 5. The guide rod 11 is inserted into the lifting component 5, and a buffer spring 12 is sleeved on the guide rod 11. The end parts of the buffer spring 12 respectively abut against the end faces of the buffer fixing block 10 and the lifting component 5.

[0038] A second stroke limiting mechanism for limiting the maximum deformation length of the shock absorber 4 is arranged between the lifting component 5 and the connecting component 6 of the present invention. The maximum stroke of the second stroke limiting mechanism is consistent with the maximum limiting stroke of the limiting hole 8. When the lifting component 6 enters the wheel lifting height range, the second stroke limiting mechanism assists in lifting the wheel 1, and can limit the connecting component 6 from rotating downward around the rotation center with the wheel carrier back plate 7 under the action of the wheel gravity and the like when the wheel is lifted, resulting in an increase in the operating stroke of the lifting mechanism 3, and further requiring a larger equipment installation space, which is not conducive to the operation of the shuttle vehicle.

[0039] Specifically, the second stroke limiting mechanism of the present invention includes a limiting link 13 and a runner 14. The runner 14 is rotatably arranged on the lifting member 5. One end of the limiting link 13 is connected to the disk of the runner 14 through a pin shaft, and the other end is hinged to the connecting member 6. When the lifting member 5 reaches the upper boundary of the limit hole 8, the connecting line between the hinge center of the limiting link 13 on the connecting member 6 and the rotation center of the runner 14 is in the same straight line as the rod body of the limiting link 13, and the distance between the lifting member 5 and the connecting member 6 reaches the maximum. When the wheel 1 travels on the track, the lower end of the limiting link 13 will move up and down synchronously with the wheel when the wheel moves up and down, and the upper end of the limiting link 13 will drive the disk 14 to rotate through the pin shaft, thereby changing the position of the upper end of the limiting link 13 to adapt to the distance change between the connecting member 6 and the lifting member 5 caused by the up and down movement of the wheel. During this process, the limiting link 13 will not affect the movement of the wheel. When it is necessary to lift the wheel to change the direction of the four-way shuttle car, during the process of the lifting member 5 rising to the upper boundary of the limit hole 8, the lower end position of the limiting link 13 remains unchanged, and the runner 14 rotatably arranged on the lifting member 5 will rotate under the action of the pulling force of the upper end of the limiting link 13 to adapt to the distance change between the connecting member 6 and the lifting member 5. When the lifting member 5 reaches the upper boundary, the second stroke limiting mechanism reaches the maximum value of the stroke that can be adjusted by rotating the runner 14, and the wheel 1 is lifted by applying a pulling force to the connecting member 6 through the limiting link 13.

[0040] In a specific embodiment, the lifting mechanism 3 of the present invention includes an electric cylinder 18 and a slider 19 connecting the driving end of the electric cylinder 18 and the lifting component 5. The upper end of the shock absorber 4 is rotatably connected to the lifting component 5 through a pin shaft. The electric cylinder 18 is fixed by a mounting plate 21, and a guide plate 22 is arranged on the mounting plate 21 along the sliding direction of the slider 19; the connecting component 6 adopts a horn arm structure, including a sleeve 15 sleeved on the wheel shaft 2 and a connecting block 16 connecting the sleeve 15 and the shock absorber 4, and the end of the connecting block 16 close to the wheel frame back plate 7 is rotatably connected to the wheel frame back plate 7, and the rotation axis is consistent with the axial direction of the wheel shaft 2. A groove 17 for mounting the end of the shock absorber 4 is provided on the connecting block 16, and the end of the shock absorber 4 is embedded in the groove 17 and rotatably connected to the wall of the groove 17 through a pin shaft; The corresponding lifting component 5 is provided with a mounting groove 20 that matches the upper end of the shock absorber 4. The symmetrical center line of the mounting groove 20 in the vertical direction is in the same vertical plane as the axis of the electric cylinder 18. The end of the shock absorber 4 is located in the mounting groove 20 and is connected to the wall of the mounting groove 20 through a pin shaft. In the embodiment of the present invention, in order to facilitate the assembly and assembly of the structure, the mounting plate 21, the guide plate 22 and the fixing plate 9 of the present invention can adopt an integrated U-shaped plate and be directly assembled as a whole. The lifting component 5 and the connecting component 6 can both adopt a U-shaped structure. The shape of the groove corresponding to the stroke of the U-shaped structure is used to facilitate the installation of the shock absorber, so as to keep the driving force axis of the electric cylinder 18 and the axis of the shock absorber 4 in the same vertical plane, thereby avoiding the additional force arm caused by the axis deviation and ensuring the smooth lifting of the wheel.

[0041] The rotating shaft assembly of the present invention includes a transmission shaft 23 and a connecting shaft 24. A fixing part 25 for fixing the suspension assembly as a whole to the vehicle body is arranged on the transmission shaft 23. According to different driving sources of the shuttle vehicle, a synchronous pulley, a gear or a sprocket and other structures can be arranged on the transmission shaft 23 to cooperate with the driving source to transmit the rotational power. The connecting shaft 24 connects the transmission shaft 23 and the wheel shaft 2 of the corresponding wheel. The connecting shaft 24 adopts a universal joint shaft. The two ends of the universal joint shaft are connected to the transmission shaft 23 and the wheel shaft 2 through the shaft head 26. The shaft head 25 at at least one end is connected to the shaft body 26 through a spline sliding fit. When the wheel 1 is lifted by the lifting mechanism 3 When driving the lifting, the universal joint shaft will correspondingly extend and retract to change its length to adapt to the change in the distance between the end of the wheel shaft and the end of the transmission shaft; the shaft assembly of the present invention designs the wheel shaft into a segmented structure, and the middle transmission shaft 23 remains fixed relative to the body of the shuttle. When the wheel vibrates and rises due to the track, only the wheel and the end of the connecting shaft 24 are lifted, thereby reducing the vibration load and the lifting load. The corresponding specifications of the shock absorber and the electric cylinder are also reduced accordingly, thereby further reducing the space occupied by the equipment, so that the equipment can be installed and used even in a smaller shuttle body.

[0042] In addition, the present invention further provides a four-way shuttle vehicle based on the above-mentioned four-way shuttle vehicle lift wheel suspension assembly. Among the wheels in two mutually perpendicular directions of the four-way shuttle vehicle, at least one direction of the wheels uses the lift wheel suspension assembly to perform height switching of the wheels in the corresponding direction, change the relative height of the wheels in the two directions, and perform switching of the moving direction of the four-way shuttle vehicle.

[0043] When the liftable wheel 1 is lower than the wheels in the other direction, the bottom of the wheel 1 contacts the track, driving the shuttle vehicle to run on the track. When vibrations occur during the running process, the wheel 1 drives the lower end of the connected shock absorber 4 to move up and down for shock absorption. At this time, the lifting component 5 connected to the upper end of the shock absorber is located in the limit hole 8, and the position in the height direction remains unchanged. When it is necessary to adjust the shock absorption performance of the shock absorber 4, the electric cylinder 18 can be used to drive the upper end of the shock absorber 4 to move up and down in the limit hole 8 for adjustment; when it is necessary to switch the moving direction of the four-way shuttle vehicle, the electric cylinder 18 drives the lifting component 5 to move upward through the slider 19. When moving to the upper boundary of the limit hole 8, the stroke of the shock absorber 4 will not change any further due to the restriction of the limiting link 13. The lifting component 5 continues to move upward, applying an upward pulling force to the connecting component 6 through the wheel carrier back plate 7 to lift the wheel. At the same time, the limiting link 13 restricts the rotation of the connecting component 6 relative to the wheel carrier back plate 7. When the height of the wheel 1 is higher than the height of the wheels on the other side, the switching of the moving direction of the four-way shuttle vehicle is completed; the lift wheel suspension assembly of the present invention has the characteristics of a compact structure and a small volume, is particularly suitable for installation in a limited space, will not interfere with other components, and has a good effect on shock absorption and lifting control of the wheels, ensuring the smooth operation of the four-way shuttle vehicle.

Claims

1. A four-way shuttle lifting wheel suspension assembly, characterized in that: The invention comprises a wheel (1) and a rotating shaft assembly connected to a wheel shaft (2) on the wheel (1) to drive the wheel (1) to rotate; a lifting mechanism (3) for lifting and lowering the wheel (1) when the four-way shuttle switches the moving direction and a shock absorber (4) for reducing vibration of the shuttle caused by track fluctuations when the wheel is traveling are connected to the wheel shaft (2); the lifting mechanism (3) is provided with a lifting component (5) connected to the upper end of the shock absorber (4); the lower end of the shock absorber (4) is rotatably connected to the wheel shaft (2) via a connecting component (6); Within the lifting stroke of the lifting mechanism (3), the lifting height is divided into a shock absorber adjustment height interval and a wheel lifting height interval located above the shock absorber adjustment height interval; a first stroke limiting mechanism for forming the shock absorber adjustment height interval is provided at the lifting component (5); the first stroke limiting mechanism is connected to the wheel axle (2), and when the lifting height of the lifting component (5) reaches the upper end point of the height interval limited by the first stroke limiting mechanism, the lifting component (5) continues to rise, driving the wheel axle (2) to rise synchronously through the first stroke limiting mechanism to lift the wheel (1); The first stroke limiting mechanism has an upper boundary and a lower boundary along the moving direction of the driving end of the lifting mechanism; the first stroke limiting mechanism comprises a wheel frame back plate (7) arranged parallel to the moving direction of the lifting component (5), and a limiting hole (8) is provided on the wheel frame back plate (7); an elastic buffer mechanism is provided at the lower end of the limiting hole (8) of the wheel frame back plate (7); A second stroke limiting mechanism for limiting the maximum deformation length of the shock absorber (4) is provided between the lifting component (5) and the connecting component (6); the maximum stroke of the second stroke limiting mechanism is consistent with the maximum limit stroke of the limit hole (8); when the lifting component (5) enters the wheel lifting height interval, the second stroke limiting mechanism assists in lifting the wheel (1); The second stroke limiting mechanism comprises a limiting link (13) and a rotating wheel (14); the rotating wheel (14) is rotatably arranged on the lifting component (5); one end of the limiting link (13) is connected to a wheel disc of the rotating wheel (14) via a pin shaft, and the other end is hinged to the connecting component (6); when the lifting component (5) reaches the upper boundary of the limiting hole (8), a line connecting a hinge center of the limiting link (13) on the connecting component (6) and a rotation center of the rotating wheel (14) and a rod body of the limiting link (13) are on the same straight line, and the distance between the lifting component (5) and the connecting component (6) reaches a maximum.

2. A four-way shuttle lifting wheel suspension assembly according to claim 1, characterized in that: When adjusting the shock absorber's shock absorption capacity, the lifting mechanism (3) drives the upper end of the shock absorber (4) to move within the boundary range of the first stroke limiting mechanism.

3. The four-way shuttle lifting wheel suspension assembly according to claim 1, characterized in that: The lower part of the wheel frame back plate (7) is connected to the connecting component (6) on the wheel axle (2), and the upper and lower boundary positions of the shock absorber adjustment height range are defined by the opening position and size of the limit hole (8).

4. The four-way shuttle lifting wheel suspension assembly according to claim 1, characterized in that: The elastic buffer mechanism is fixed on the wheel frame back plate (7), the elastic end is in contact with the lifting component (5), and a fixing plate (9) for limiting the position of the lower end of the wheel frame back plate (7) is provided at the lower end of the wheel frame back plate (7). When the lifting component (5) moves up and down within the height range where the limiting hole (8) is located, the elastic buffer mechanism applies a downward elastic force to keep the wheel frame back plate (7) in contact with the fixing plate (9) and to buffer the movement of the lifting component (5).

5. The four-way shuttle lifting wheel suspension assembly according to claim 4, characterized in that: The elastic buffer mechanism comprises a buffer fixing block (10) fixedly arranged on a wheel frame back plate (7); a guide rod (11) is arranged at one end of the buffer fixing block (10) close to the lifting component (5); the guide rod (11) is inserted into the lifting component (5); a buffer spring (12) is sleeved on the guide rod (11); and ends of the buffer spring (12) are respectively in contact with end surfaces of the buffer fixing block (10) and the lifting component (5).

6. The four-way shuttle lifting wheel suspension assembly according to claim 1, characterized in that: The connecting component (6) is rotatably connected to the wheel frame back plate (7). When the wheel (1) rises and falls under the action of the track, the connecting component (6) rotates along the rotation axis relative to the wheel frame back plate (7), driving the lower end of the shock absorber (4) to move, thereby performing shock absorption on the four-way shuttle vehicle.

7. The four-way shuttle lifting wheel suspension assembly according to claim 1, characterized in that: The connecting component (6) comprises a shaft sleeve (15) sleeved on the wheel shaft (2) and a connecting block (16) connecting the shaft sleeve (15) and the shock absorber (4); one end of the connecting block (16) close to the wheel frame back plate (7) is rotatably connected to the wheel frame back plate (7); the rotation axis is consistent with the axis direction of the wheel shaft (2); a groove (17) for mounting the end of the shock absorber (4) is provided on the connecting block (16); the end of the shock absorber (4) is embedded in the groove (17) and is rotatably connected to the wall surface of the groove (17) via a pin.

8. The four-way shuttle lifting wheel suspension assembly according to claim 1, characterized in that: The lifting mechanism (3) comprises an electric cylinder (18) and a slider (19) connecting a driving end of the electric cylinder (18) and a lifting component (5); the upper end of the shock absorber (4) is rotatably connected to the lifting component (5) via a pin shaft.

9. A four-way shuttle lifting wheel suspension assembly according to claim 8, characterized in that: The lifting component (5) is provided with a mounting groove (20) which matches the upper end of the shock absorber (4); the vertical symmetry center line of the mounting groove (20) and the axis of the electric cylinder (18) are located in the same vertical plane; the end of the shock absorber (4) is located in the mounting groove (20) and is connected to the wall of the mounting groove (20) via a pin shaft.

10. The four-way shuttle lifting wheel suspension assembly according to claim 8, characterized in that: The electric cylinder (18) is fixed by means of a mounting plate (21), and a guide plate (22) is arranged on the mounting plate (21) along the sliding direction of the slide block (19).

11. The four-way shuttle lifting wheel suspension assembly according to claim 1, characterized in that: The rotating shaft assembly comprises a transmission shaft (23) and a connecting shaft (24); a fixing member (25) for fixing the suspension assembly as a whole on a vehicle body is arranged on the transmission shaft (23); and the connecting shaft (24) connects the transmission shaft (23) and a wheel shaft (2) of a corresponding wheel.

12. A four-way shuttle lifting wheel suspension assembly according to claim 11, characterized in that: The connecting shaft (24) is a universal joint shaft, and the two ends of the universal joint shaft are connected to the transmission shaft (23) and the wheel shaft (2) through shaft heads (26). The shaft head (26) at at least one end is connected to the shaft body (27) through a spline sliding fit. When the wheel (1) is lifted or lowered by the lifting mechanism (3), the universal joint shaft is correspondingly extended and retracted to change its length to adapt to the change in the distance between the end of the wheel shaft and the end of the transmission shaft.

13. A four-way shuttle vehicle, using the four-way shuttle vehicle lifting wheel suspension assembly according to any one of claims 1 to 12, characterized in that: Among the wheels in two directions perpendicular to each other of the four-way shuttle, the wheels in at least one direction use a lifting wheel suspension assembly to switch the height of the wheels in the corresponding direction, thereby changing the relative heights of the wheels in the two directions and switching the moving direction of the four-way shuttle.

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