Four-way shuttle vehicle lifting wheel suspension assembly and four-way shuttle vehicle

Abstract

The invention discloses a four-way shuttle vehicle lifting wheel suspension assembly and a four-way shuttle vehicle. The suspension assembly comprises wheels and a rotating shaft assembly connected with wheel axles on the wheels. The lifting mechanism is used for driving the wheels to ascend and descend, the shock absorber is used for reducing shock of the shuttle vehicle caused by fluctuation of a rail when the wheels run, and the lifting mechanism is provided with a lifting component connected with the upper end of the shock absorber. A first stroke limiting mechanism used for forming a height adjusting interval of the shock absorber is arranged at the lifting component; the first stroke limiting mechanism is used for limiting the shock absorber adjusting height interval, the shock absorber adjusting height interval and the wheel lifting height interval are divided, and therefore the same lifting mechanism can be used for achieving shock absorber adjusting and wheel lifting operation, the equipment structure is simplified, the occupied space of equipment is limited and reduced, and the service life of the equipment is prolonged. Damping and reversing operation of running of the four-way shuttle vehicle are achieved within a limited space range.

Description

Technical Field

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

[0002] The four-way shuttle is a trolley that can travel in four directions by changing the grounding conditions of the wheels on both sides, that is, the trolley can move in two directions of the x channel and y channel of the shelf. The specific method is that when the x-track wheels are on the ground and the y-track wheels are suspended, it is in the x-channel mode, at which time the shuttle can travel in the x channel; when the y-track wheels are on the ground and the x-track wheels are suspended, it is in the y-channel mode, at which time the shuttle can travel in the y channel, realizing the shuttle's reversing function.

[0003] In the field of vertical warehouse shuttle vehicles, the volume of the trolley is limited. Therefore, in the prior art, the four-way shuttle vehicle needs to be equipped with a wheel lifting mechanism, so there is no space to set the wheel vibration reduction mechanism. Therefore, the wheels of the trolley are generally set as rubber-coated wheels, which reduce the vibration of the trolley and reduce the impact between the trolley and the vertical warehouse. However, the shock-absorbing function and effect of the rubber-coated wheels are not ideal, so there is an urgent need for a suspension mechanism used in the four-way shuttle vehicle to achieve shock absorption and lifting of the wheels of the four-way shuttle vehicle. Summary of the invention

[0004] Technical purpose: In view of the above-mentioned deficiencies of the existing shuttle vehicles, the present invention discloses a four-way shuttle vehicle lifting wheel suspension assembly and a four-way shuttle vehicle which can simultaneously realize wheel lifting and shock absorption in a limited space.

[0005] Technical solution: To achieve the above technical objectives, the present invention adopts the following technical solution: The wheel axle is connected to the lifting and lowering mechanism of the lifting and lowering mechanism when the four-way shuttle vehicle switches the moving direction, and the wheel axle is connected to the lifting and lowering mechanism of the lifting and lowering mechanism for driving the wheel to lift and lower when the four-way shuttle vehicle switches the moving direction, and the wheel axle is used to reduce the vibration of the shuttle vehicle caused by the undulation of the track when the wheel is traveling. The lifting mechanism is provided with a lifting component connected with the upper end of the shock absorber, and the lower end of the shock absorber is rotatably connected with the wheel axle through a connecting component. Within the lifting stroke of the lifting 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 lifting component; the first stroke limiting mechanism is connected to the wheel axle, and when the lifting height of the lifting component reaches the upper end point of the height interval limited by the first stroke limiting mechanism, the lifting component continues to rise and drives the wheel axle to rise synchronously through the first stroke limiting mechanism to lift the wheel.

[0006] 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 absorber's damping capacity, the lifting mechanism drives the upper end of the shock absorber to move within the boundary range of the first stroke limiting mechanism.

[0007] Preferably, the first stroke limiting mechanism of the present invention includes a wheel frame back plate arranged parallel to the moving direction of the lifting component, the lower part of the wheel frame back plate is connected to the connecting component on the wheel axle, and a limiting hole is opened on the wheel frame back plate. 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.

[0008] Preferably, the wheel frame back plate of the present invention is provided with an elastic buffer mechanism at the lower end of the limiting hole, the elastic buffer mechanism is fixed on the wheel frame back plate, the elastic end is in contact with the lifting component, and a fixed plate for limiting the lower end position of the wheel frame back plate is provided at the lower end of the wheel frame back plate. When the lifting component moves up and down within the height range where the limiting hole is located, the elastic buffer mechanism applies a downward elastic force to keep the wheel frame back plate in contact with the fixed plate and buffer the movement of the lifting component.

[0009] Preferably, the elastic buffer mechanism of the present invention includes a buffer fixing block fixedly arranged on the back plate of the wheel frame, a guide rod is arranged at one end of the buffer fixing block close to the lifting component, the guide rod is passed through the lifting component, a buffer spring is sleeved on the guide rod, and the ends of the buffer spring are respectively abutted against the end faces of the buffer fixing block and the lifting component.

[0010] Preferably, the connecting component of the present invention is rotatably connected to the wheel frame back plate. When the wheel rises and falls under the action of the track, the connecting component rotates along the rotation axis relative to the wheel frame back plate, driving the lower end of the shock absorber to move, thereby performing shock absorption on the four-way shuttle.

[0011] Preferably, a second stroke limiting mechanism for limiting the maximum deformation length of the shock absorber is arranged 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 limit stroke of the limiting hole, and when the lifting component enters the wheel lifting height range, the second stroke limiting mechanism assists in lifting the wheel.

[0012] Preferably, the second stroke limiting mechanism of the present invention includes a limiting link and a rotating wheel, and 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 line connecting 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 on the same straight line, and the distance between the lifting component and the connecting component reaches the maximum.

[0013] Preferably, the connecting component of the present invention includes a sleeve sleeved on the wheel axle and a connecting block connecting the sleeve and the shock absorber, wherein one end of the connecting block close to the wheel frame back plate is rotatably connected to the wheel frame back plate, and the rotation axis is consistent with the axial direction of the wheel axle, and a groove for installing the end of the shock absorber is provided on the connecting block, and the end of the shock absorber is embedded in the groove and rotatably connected to the wall of the groove through a pin shaft.

[0014] Preferably, the lifting mechanism of the present invention comprises an electric cylinder and a slider connecting a driving end of the electric cylinder and a lifting component, and the upper end of the shock absorber is rotatably connected to the lifting component via a pin shaft.

[0015] Preferably, the lifting component of the present invention is provided with an installation groove that matches the upper end of the shock absorber, the vertical symmetry center line 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 of the installation groove through a pin shaft.

[0016] Preferably, the electric cylinder of the present invention is fixed by a mounting plate, and a guide plate is arranged on the mounting plate along the sliding direction of the slider.

[0017] Preferably, the shaft assembly of the present invention comprises a transmission shaft and a connecting shaft, a fixing member for fixing the suspension assembly as a whole to the vehicle body is provided on the transmission shaft, and the connecting shaft connects the transmission shaft and the wheel axle of the corresponding wheel.

[0018] Preferably, the connecting shaft of the present invention adopts a universal joint shaft, and the two ends of the universal joint shaft are connected to the drive shaft and the wheel shaft through shaft heads. The shaft head at at least one end is connected to the shaft body through a spline sliding fit. When the wheel is driven to rise and fall by the lifting mechanism, 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 drive shaft.

[0019] The present invention also provides a four-way shuttle vehicle, which uses the above-mentioned four-way shuttle vehicle lifting wheel suspension assembly. Among the wheels in two directions perpendicular to each other of the four-way shuttle vehicle, the wheels in at least one direction use the 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 vehicle.

[0020] Beneficial effects: The four-way shuttle lifting wheel suspension assembly and the four-way shuttle disclosed in the present invention have the following beneficial effects: 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, and the shock absorber adjustment height range is adjusted by the first stroke limiting mechanism, and the shock absorber adjustment height range and the wheel lifting height range are divided, so that the same lifting mechanism can be used to achieve the shock absorption adjustment of the shock absorber and the lifting operation of the wheel, simplifying the equipment structure, thereby further limiting the occupied space of the equipment, and realizing the shock absorption and switching operations of the four-way shuttle vehicle within a limited space.

[0021] 2. The first stroke limiting mechanism of the present invention is connected to the wheel axle, 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 that the adjustment range of the shock absorber can be limited by the mechanical limit structure. At the same time, the deformation range of the shock absorber can be controlled, so that the deformation beyond the limit will cause damage to the shock absorber and affect the shock absorption performance of the shock absorber.

[0022] 3. The first stroke limiting mechanism of the present invention defines the upper and lower boundaries of the shock absorber adjustment height range by opening a limit hole on the wheel frame back plate. The plate-like structure can reduce the occupied space. At the same time, the boundary can be adjusted by the size of the limit hole. There is no need for a complex adjustment structure and the reliability of the limit can be guaranteed.

[0023] 4. An elastic buffer mechanism is provided on the wheel frame back plate of the present invention, through which the adjustment range of the shock absorber can be buffered to avoid direct impact on the structure through the action of the electric cylinder; the elastic buffer mechanism can also generate a downward force on the wheel frame back plate, so that during the normal operation of the shock absorber, the position of the wheel frame back plate remains stable to avoid up and down vibration with the wheel.

[0024] 5. The elastic buffer mechanism of the present invention is guided by the guide rod in cooperation with the lifting component, which can avoid the deflection between the lifting component and the axis of the shock absorber, thereby affecting the transmission of the force of the electric cylinder on the shock absorber.

[0025] 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 assists in lifting the wheel, preventing the connecting component from rotating downward relative to the wheel frame back plate under the action of the wheel's gravity, affecting the lifting height of the wheel and increasing the height space required for lifting.

[0026] 7. The connecting shaft of the present invention adopts a universal joint and can rotate relative to the transmission shaft. The transmission shaft is relatively fixed to the shuttle in the height direction. When the wheel is lifted, the wheel provides a lifting or bouncing displacement through the extension and retraction of the connecting shaft, thereby reducing the wheel lifting load and the required equipment power, thereby achieving simultaneous shock absorption and lifting of the wheel within the limited installation space of the four-way shuttle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0028] Figure 1 This is the overall structural diagram of the lifting wheel suspension assembly of the present invention; Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A area; Figure 3 The elastic buffer mechanism structure diagram of the present invention Among them, 1-wheel, 2-wheel axle, 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 sleeve, 16-connecting block, 17-groove, 18-electric cylinder, 19-slider, 20-mounting groove, 21-mounting plate, 22-guide plate, 23-drive shaft, 24-connecting shaft, 25-fixing part, 26-axle head, 27-axle body. DETAILED DESCRIPTION

[0029] Reference will now be made in detail to embodiments of the present disclosure, one or more examples of which are set forth herein below. Each embodiment and example is provided by explaining the apparatus, composition and materials of the present disclosure, rather than limiting. On the contrary, the following description provides a convenient illustration of an exemplary embodiment for implementing the present disclosure. In fact, it will be clear to those skilled in the art that various modifications and variations can be made in the teachings of the present disclosure without departing from the scope or spirit of the present disclosure. For example, a feature shown or described as a part of an embodiment can be used in conjunction with another embodiment to produce yet another embodiment. It is expected that the present disclosure covers such modifications and variations within the scope of the appended claims and their equivalents. Other objects, features and aspects of the present disclosure are disclosed in or clear from the following detailed description. It will 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 wider aspects of the present disclosure.

[0030] like Figure 1 and Figure 2As shown, the present invention discloses a lifting wheel suspension assembly of a four-way shuttle vehicle, comprising 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 vehicle switches the moving direction and a shock absorber 4 for reducing the vibration of the shuttle vehicle caused by the undulation of the track 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, and the lower end of the shock absorber 4 is rotatably connected to the wheel shaft 2 through a connecting component 6; the shock absorbing capacity adjustment of the shock absorber 4 and the lifting and lowering of the wheel 1 can be achieved by using the action of the same lifting mechanism 3, so that the setting of the shock absorbing and lifting equipment can be achieved when the installation space of the shuttle vehicle is limited. At the same time, the lifting wheel suspension assembly of the present application is not limited to the specific technical field of the four-way shuttle vehicle, and can also be applied to other scenes where the wheel needs to be lifted and lowered and the wheel needs to be damped during operation.

[0031] The present invention divides the lifting height into a shock absorber adjustment height interval and a wheel lifting height interval located above the shock absorber adjustment height interval within the lifting stroke of the lifting mechanism 3; 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 having an upper boundary and a lower boundary along the moving direction of the driving end of the lifting mechanism, and when the shock absorber damping capacity is adjusted, 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; the first stroke limiting mechanism is connected to the wheel axle 2, and when the lifting height of the lifting component 6 reaches the upper end point of the height interval limited by the first stroke limiting mechanism, the lifting component 6 continues to rise and will drive the wheel axle 2 to rise synchronously through the first stroke limiting mechanism to lift the wheel 1; by setting the first stroke limiting mechanism, the shock absorption adjustment range of the shock absorber can be controlled The control can avoid directly lifting the wheel through the shock absorber 4, which leads to low controllable accuracy of the lifting height and easily causes damage to the shock absorber itself, affecting the shock absorption performance. In a specific embodiment, the first stroke limiting mechanism of the present invention includes a wheel frame back plate 7 arranged in parallel with the moving direction of the lifting component 5. The lower part of the wheel frame back plate 7 is connected to the connecting component 6 on the wheel axle 2. A limiting hole 8 is opened on the wheel frame back plate 7. 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 8. The wheel frame back plate 7 is a plate-like structure as a whole to reduce the occupied space. At the same time, in order to facilitate the transmission of the force acting on the lifting component 5, a horizontal protrusion can be set on the wheel frame back plate 7 at the upper boundary of the limiting hole 8 to increase the contact area with the lifting component 5, so as to better transmit the lifting force and ensure the stability of the wheel 1 during the lifting process.

[0032] The lower end of the wheel frame back plate 7 is connected to the wheel axle 2 through the connecting component 6. When the wheel axle 2 is affected by the track and drives the lower end of the shock absorber 4 to move up and down for shock absorption, the wheel frame 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. For this reason, the present invention rotatably connects the connecting component 6 with the wheel frame back plate 7. When the wheel 1 rises and falls due to 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 for the four-way shuttle vehicle; the wheel frame back plate 7 is provided with an elastic buffer mechanism at the lower end of the limiting hole 8, and the elastic buffer mechanism is fixed on the wheel frame back plate 7, and the elastic end abuts against the lifting component 5. A fixing plate 9 is provided at the lower end of 7 for limiting the lower end position 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, a downward elastic force is applied by the elastic buffer mechanism to keep the wheel frame 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 frame back plate 7, and a guide rod 11 is provided at one end of the buffer fixing block 10 close to the lifting component 5. The guide rod 11 is penetrated in the lifting component 5, and a buffer spring 12 is sleeved on the guide rod 11, and the ends of the buffer spring 12 are respectively in contact with the end faces of the buffer fixing block 10 and the lifting component 5.

[0033] 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 limit stroke of the limiting hole 8. When the lifting component 6 enters the wheel lifting height interval, 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 of the wheel frame 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, thereby requiring a larger equipment installation space, which is not conducive to the operation of the shuttle vehicle.

[0034] Specifically, the second stroke limiting mechanism of the present invention includes a limiting link 13 and a rotating wheel 14, wherein the rotating wheel 14 is rotatably arranged on the lifting component 5, one end of the limiting link 13 is connected to the wheel disc of the rotating wheel 14 through 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, the line connecting the hinge center of the limiting link 13 on the connecting component 6 and the rotation center of the rotating wheel 14 and the 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 the maximum; when the wheel 1 remains on the track, the lower end of the limiting link 13 will keep rising and falling synchronously with the wheel when the wheel moves up and down, and the upper end of the limiting link 13 will drive the wheel disc 14 to rotate together with the pin shaft, thereby changing the limiting The position of the upper end of the connecting rod 13 is to adapt to the change in the distance between the connecting component 6 and the lifting component 5 caused by the up and down movement of the wheel. During this process, the limiting connecting rod 13 will not affect the movement of the wheel; when the wheel needs to be lifted to change the direction of the four-way shuttle, the lifting component 5 rises to the upper boundary of the limiting hole 8, and the lower end position of the limiting connecting rod 13 remains unchanged. The rotating wheel 14 set on the lifting component 5 will rotate under the action of the pulling force of the upper end of the limiting connecting rod 13 to adapt to the change in the distance between the connecting component 6 and the lifting component 5. When the lifting component 5 reaches the upper boundary, the second stroke limiting mechanism reaches the maximum stroke that can be adjusted by rotating the rotating wheel 14, and applies pulling force to the connecting component 6 by limiting the connecting rod 13 to lift the wheel 1.

[0035] 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.

[0036] 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.

[0037] In addition, the present invention also provides a four-way shuttle vehicle based on the above-mentioned four-way shuttle vehicle lifting wheel suspension assembly. Among the wheels in two directions perpendicular to each other of the four-way shuttle vehicle, the wheels in at least one direction use the 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 vehicle.

[0038] When the liftable wheel 1 is lower than the wheel in the other direction, the bottom of the wheel 1 contacts the track, driving the shuttle vehicle to run on the track. When vibration occurs during operation, the wheel 1 will drive 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 limiting hole 8, and the height direction position remains unchanged. When the shock absorption performance of the shock absorber 4 needs to be adjusted, the upper end of the shock absorber 4 can be driven by the electric cylinder 18 to move up and down in the limiting hole 8 for adjustment; when the moving direction of the four-way shuttle vehicle needs to be switched, the electric cylinder 18 drives the lifting component 5 to move upward through the slider 19, and when it moves to the upper boundary of the limiting hole 8 The stroke of the shock absorber 4 will not change further due to the limitation of the limiting link 13, and the lifting component 5 will continue to move upward, applying an upward pulling force to the connecting component 6 through the wheel frame back plate 7 to lift the wheel. At the same time, the limiting link 13 limits the rotation of the connecting component 6 relative to the wheel frame back plate 7. When the height of the wheel 1 is higher than that of the wheel on the other side, the switching of the moving direction of the four-way shuttle is completed. The lifting wheel suspension assembly of the present invention has the characteristics of compact structure and small size, and is particularly suitable for installation in a limited space without interfering with other components. It also has a good effect on the shock absorption and lifting control of the wheel, thereby ensuring the smooth operation of the four-way shuttle.

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 (6) reaches the upper end point of the height interval limited by the first stroke limiting mechanism, the lifting component (6) continues to rise and drives the wheel axle (2) to rise synchronously through the first stroke limiting mechanism to lift the wheel (1).

2. A four-way shuttle lifting wheel suspension assembly according to claim 1, characterized in that: 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, and when the shock absorber's shock absorption capacity is adjusted, 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. A four-way shuttle lifting wheel suspension assembly according to claim 2, characterized in that: The first stroke limiting mechanism comprises a wheel frame back plate (7) arranged parallel to the moving direction of the lifting component (5), the lower part of the wheel frame back plate (7) being connected to the connecting component (6) on the wheel axle (2), and a limiting hole (8) being provided on the wheel frame back plate (7), 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 (8).

4. A four-way shuttle lifting wheel suspension assembly according to claim 3, characterized in that: The wheel frame back plate (7) is provided with an elastic buffer mechanism at the lower end of the limiting hole (8), 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 3, 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 3, characterized in that: 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 (6) enters the wheel lifting height range, the second stroke limiting mechanism assists in lifting the wheel (1).

8. The four-way shuttle lifting wheel suspension assembly according to claim 7, characterized in that: 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.

9. 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.

10. 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.

11. A four-way shuttle lifting wheel suspension assembly according to claim 10, 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.

12. The four-way shuttle lifting wheel suspension assembly according to claim 10, 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).

13. 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.

14. A four-way shuttle lifting wheel suspension assembly according to claim 13, 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), and the shaft head (25) at at least one end is connected to the shaft body (27) through a spline sliding fit, and when the wheel (1) is driven to rise and fall 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.

15. A four-way shuttle vehicle, using the four-way shuttle vehicle lifting wheel suspension assembly according to any one of claims 1 to 14, 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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