Transport vehicle and its driving mechanism

Abstract

The utility model relates to a driving mechanism of a transport vehicle, wherein a first spring and a buffer block are sleeved on the outer side of the shaft head, the lower end of the first spring is limited by a first lower limit plate installed on the shaft head, and the upper end of the first spring is limited by a second bearing connected to the shaft head; the buffer block is located below the first bearing, the lower end of the buffer block is limited by a second limit plate installed on the shaft head, and the upper end of the buffer block is limited by the first bearing; the shaft head can slide axially relative to the first bearing and the second bearing. The utility model also relates to a transport vehicle, including the above-mentioned driving mechanism. The above-mentioned scheme uses the spring and the buffer to perform elastic buffering, which can increase the load and keep the extension and contraction distance of the spring within an appropriate range, so that the vehicle has good ability to pass through pits and bumps and climb slopes.

Description

Technical Field

[0001] The utility model relates to the technical field of transport vehicles, in particular to a transport vehicle and a driving mechanism thereof. Background Art

[0002] The utility model patent with publication number CN219709031U discloses a driving floating mechanism and a double-pallet stacker truck thereof, the driving floating mechanism includes a driving system, the driving system includes a driving mounting frame and an axle head, a compression spring is sleeved on the axle head, one end of the compression spring abuts against a spring pad, and the other end abuts against a thrust ball bearing, and the lower end of the axle head is connected to a driving wheel through a driving assembly. The compression spring is provided to provide appropriate elastic force to meet the vehicle climbing requirements; when the driving wheel is vibrated, the vibration can be buffered and eliminated through the elastic contraction of the compression spring.

[0003] The above scheme is used in stackers, which have a relatively small load when fully loaded. However, when fully loaded, transport trucks and order pickers have a large load, generally reaching about 300kg. If the above floating scheme is used in transport trucks and order pickers, the compression of the compression spring will vary greatly when the vehicle is empty and fully loaded, and the drive mounting frame may touch the ground; if a spring with a large elastic coefficient is used, the vehicle will have poor ability to cope with potholes and bumps. Summary of the invention

[0004] In order to solve the above problems, the purpose of the utility model is to provide a driving mechanism of a transport vehicle according to the working characteristics of the transport vehicle and the picking vehicle.

[0005] A driving mechanism of a transport vehicle comprises a floating mounting plate and an axle head for connecting a handle; the axle head is longitudinally arranged, and its lower part is connected to the floating mounting plate through a first bearing, the axle head downwardly penetrates the floating mounting plate, and the lower end of the axle head is connected to a driving wheel through a driving assembly; a first spring and a buffer block are sleeved on the outer side of the axle head, the lower end of the first spring is limited by a first lower limit plate installed on the axle head, and the upper end of the first spring is limited by a second bearing connected to the axle head; the buffer block is located below the first bearing, the lower end of the buffer block is limited by a second limit plate installed on the axle head, and the upper end of the buffer block is limited by the first bearing; the axle head can slide axially relative to the first bearing and the second bearing.

[0006] Preferably, a first locking nut is threadedly connected to the shaft head, and the lower end of the first locking nut abuts against the upper end of the second bearing.

[0007] Preferably, a floating upper limit stopper for limiting the maximum floating distance is provided on the shaft head.

[0008] Preferably, universal wheel mounting seats are provided on both sides of the floating mounting plate, and the universal wheel assembly can be lifted and lowered on the universal wheel mounting seats.

[0009] Preferably, the universal wheel assembly and the universal wheel mounting seat are connected via a longitudinally arranged screw and nut.

[0010] Preferably, universal wheel mounting seats are provided on both sides of the floating mounting plate, the universal wheel assembly is mounted on the universal wheel mounting seats, and the universal wheel assembly includes a wheel pressure adjusting mechanism for adjusting the wheel pressure of the universal wheel.

[0011] Preferably, the universal wheel assembly includes a first bracket and a second bracket, the wheel axle of the universal wheel is rotatably set on the first bracket, and the first bracket is connected to the second bracket by a rotating pin; the first bracket includes a first connecting plate arranged along the longitudinal direction, and the second bracket includes a second connecting plate arranged along the longitudinal direction; the wheel pressure adjustment structure includes an adjusting screw, a second spring and a second locking nut, the adjusting screw is arranged horizontally, the second spring is sleeved on the adjusting screw, and one end of the adjusting screw passes through the first connecting plate and the second connecting plate and is connected to the second locking nut.

[0012] The utility model also aims to provide a transport vehicle, comprising the driving mechanism of the transport vehicle described in any one of the above items.

[0013] Preferably, the transport vehicle comprises a pedal, and a detection device for detecting whether there is a person on the pedal is provided under the pedal, and the control device controls the vehicle to start according to a signal fed back by the detection device.

[0014] Optionally, the detection device is a pressure sensor.

[0015] Optionally, the detection device is a contact switch, the pedal can be swung up and down and is installed on the base, and an elastic buffer is provided between the pedal and the base; when there is no one on the pedal, the pedal is supported by the elastic buffer and separated from the contact switch, and the contact switch is disconnected; when there is someone on the pedal, the elastic buffer is compressed, the pedal contacts the contact switch, and the contact switch is turned on.

[0016] Preferably, the seat is mounted on the frame in a liftable manner.

[0017] The driving mechanism in the present application can increase the load and keep the extension distance of the spring within a suitable range by using the spring and the buffer to perform elastic buffering, so that the vehicle has good ability to pass through potholes and bumps and climb slopes. The transport vehicle in the present application also has the above effects due to the use of the driving mechanism of the above structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the driving mechanism in this application.

[0019] Reference numerals:

[0020] Floating mounting plate 1, shaft head 2, first lower limit plate 21, second lower limit plate 22, driving assembly 3, first spring 41, buffer block 42, first bearing 51, second bearing 52, first locking nut 6, floating upper limit member 7, universal wheel mounting seat 8, universal wheel assembly 9, first bracket 91, first connecting plate 911, second bracket 92, second connecting plate 921, rotating pin 93, adjusting screw 94, second spring 95, second locking nut 96. DETAILED DESCRIPTION

[0021] The embodiments of the present utility model are described in detail below.

[0022] Embodiment 1

[0023] This embodiment provides a driving mechanism of a transport vehicle, such as Figure 1 As shown, the driving mechanism includes a floating mounting plate 1 and a shaft head 2 for connecting the handle, the shaft head 2 is longitudinally arranged, and its lower part is connected to the floating mounting plate 1 through a first bearing 51, the shaft head 2 passes through the floating mounting plate 1 downward, and the lower end of the shaft head 2 is connected to the driving wheel through a driving assembly 3; so that after the handle is connected to the shaft head 2, the steering of the vehicle can be controlled by manipulating the handle. In the embodiment, a plurality of pin holes are provided on the upper part of the shaft head 2, and the handle and the shaft head 2 are fixed to the shaft head 2 through spring pins, and the connection structure is simple.

[0024] The outer side of the shaft head 2 is sleeved with a first spring 41 and a buffer block 42, the lower end of the first spring 41 is limited by the first lower limit plate 21 installed on the shaft head 2, and the upper end of the first spring 41 is limited by the second bearing 52 connected to the shaft head 2; the buffer block 42 is located below the first bearing 51, the lower end of the buffer block 42 is limited by the second lower limit plate 22 installed on the shaft head 2, and the upper end of the buffer block 42 is limited by the first bearing 51; the shaft head 2 can slide axially relative to the first bearing 51 and the second bearing 52. The shaft head 2 is fixed by the first bearing 51 and the second bearing 52, and the shaft head 2 can rotate circumferentially relative to the bearings to realize the steering control of the drive wheel. And the shaft head 2 can slide up and down axially relative to the first bearing 51 and the second bearing 52, so that the first spring 41 and the buffer block 42 can be extended and retracted, and the drive wheel can float up and down. In a specific embodiment,

[0025] The axial sliding of the shaft head 2 can be achieved by selecting the types of the first bearing 51 and the second bearing 52. In a preferred embodiment, the first bearing 51 is a deep groove ball bearing, and the second bearing 52 is a thrust ball bearing.

[0026] In a specific embodiment, the front wheel of the transport truck is a driving wheel. When the vehicle is unloaded, the front wheel load is 160kg, and when it is fully loaded with 1.5t, the front wheel load is 380kg. When climbing a slope with load, the front wheel load requires 300kg. The elastic force of the first spring 41 is 160kg when the universal wheel is parallel to the driving wheel. The pre-compression elastic force of a single universal wheel is 30kg. When climbing a slope with full load, the driver continues to compress the buffer block 42 and the first spring 41 to make the front wheel load reach the required 300kg, and the universal wheels on both sides continue to compress 30-40kg, so that the driving wheel meets the climbing wheel pressure.

[0027] In a preferred embodiment, a first locking nut 6 is threadedly connected to the shaft head 2, and the lower end of the first locking nut 6 abuts against the upper end of the second bearing 52. By adjusting the connection position of the first locking nut 6 on the shaft head 2, the pre-compression amount of the first spring 41 can be adjusted, and its telescopic distance can be adjusted to meet the requirements of the load state of different vehicles. In addition, the method of using the first locking nut 6 for adjustment is simple to operate.

[0028] A floating upper limit stop 7 for limiting the maximum floating distance is provided on the shaft head 2. In a scheme where the first locking nut 6 is not provided, the floating upper limit stop 7 is located above the second bearing 52; in a scheme where the first locking nut 6 is provided, the floating upper limit stop 7 is located above the first locking nut 6.

[0029] Universal wheel mounting seats 8 are provided on both sides of the floating mounting plate 1, and universal wheel assemblies 9 are installed on the universal wheel mounting seats 8. As a preferred embodiment, the universal wheel assembly 9 can be adjusted in a lifting manner in the universal wheel mounting seats 8. As an optional embodiment, the universal wheel assembly 9 is connected to the universal wheel mounting seats 8 through a longitudinally arranged screw rod and a nut. The height adjustment of the universal wheel assembly 9 can be achieved by adjusting the connection position of the screw rod 94.

[0030] In a preferred embodiment. The universal wheel assembly 9 includes a wheel pressure adjustment mechanism for adjusting the wheel pressure of the universal wheel, and the wheel pressure of the universal wheel can be adjusted by the wheel pressure adjustment mechanism. In this embodiment, the universal wheel assembly 9 includes a first bracket 91 and a second bracket 92, the wheel axle of the universal wheel is rotatably arranged on the first bracket 91, and the first bracket 91 and the second bracket 92 are connected by a rotating pin 93; the first bracket 91 includes a first connecting plate 911 arranged in the longitudinal direction, and the second bracket 92 includes a second connecting plate 921 arranged in the longitudinal direction; the wheel pressure adjustment mechanism includes an adjusting screw 94, a second spring 95 and a second locking nut 96, the adjusting screw 94 is arranged horizontally, the second spring 95 is sleeved on the adjusting screw 94, and one end of the adjusting screw 94 passes through the first connecting plate 911 and the second connecting plate 921 and is connected to the second locking nut 96. The wheel pressure adjustment mechanism in this scheme has a compact structure, and the second spring 95 is independently arranged from the height adjustment mechanism of the universal wheel assembly 9, and the height of the universal wheel assembly 9 will not be changed when the wheel pressure of the universal wheel is adjusted. In other optional embodiments, the expansion and contraction direction of the second spring 95 in the wheel pressure adjustment device may also be set along the height direction of the universal wheel.

[0031] Embodiment 2

[0032] This embodiment provides a transport vehicle, which includes the driving mechanism of the first embodiment. Furthermore, the transport vehicle includes a pedal, and the driver stands on the pedal to operate it during driving. A detection device for detecting whether there is a person on the pedal is provided under the pedal, and the control device controls the start of the vehicle according to the signal fed back by the detection device. With this arrangement, the vehicle can be automatically started after a person stands on the pedal, and the control of the entire vehicle is more intelligent and safer. In an optional embodiment, the detection device is a pressure sensor, which determines whether someone is standing on the pedal by detecting pressure changes. In another optional embodiment, the detection device is a contact switch, and the pedal can be swung up and down and installed on a base. The pedal

[0033] There is an elastic buffer between the pedal and the base; when there is no one on the pedal, the pedal is supported by the elastic buffer and separated from the contact switch, and the contact switch is disconnected; when there is someone on the pedal, the elastic buffer is compressed, the pedal contacts the contact switch, and the contact switch is turned on. Whether someone is standing on the pedal is determined by the change of the on-off signal of the contact switch.

[0034] Preferably, the seat can be mounted on the frame in a liftable manner to accommodate operators of different heights. In an optional embodiment, the seat mounting plate is fixed to the back plate mounting plate, and the seat is finely adjusted in height through the fixing screws on the seat mounting plate and the waist-shaped holes on the back plate mounting plate. Furthermore, the back plate mounting plate is fixed to the seat adjustment plate, and the seat adjustment plate is provided with a plurality of connection holes arranged longitudinally in the height direction. By connecting the seat mounting plate to the connection holes at different heights on the seat adjustment plate, the seat height can be adjusted.

[0035] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A driving mechanism of a transport vehicle, comprising a floating mounting plate and a shaft head for connecting a handle; the shaft head is arranged longitudinally, and its lower part is connected to the floating mounting plate through a first bearing, the shaft head passes through the floating mounting plate downward, and the lower end of the shaft head is connected to a driving wheel through a driving assembly; characterized in that: A first spring and a buffer block are sleeved on the outer side of the shaft head, the lower end of the first spring is limited by a first lower limit plate installed on the shaft head, and the upper end of the first spring is limited by a second bearing connected to the shaft head; the buffer block is located below the first bearing, the lower end of the buffer block is limited by the second lower limit plate installed on the shaft head, and the upper end of the buffer block is limited by the first bearing; the shaft head can slide axially relative to the first bearing and the second bearing.

2. A driving mechanism of a transport vehicle according to claim 1, characterized in that: A first locking nut is threadedly connected to the shaft head, and the lower end of the first locking nut abuts against the upper end of the second bearing.

3. The driving mechanism of a transport vehicle according to claim 1, characterized in that: A floating upper limit stopper for limiting the maximum floating distance is arranged on the shaft head.

4. The driving mechanism of a transport vehicle according to claim 1, characterized in that: Universal wheel mounting seats are arranged on both sides of the floating mounting plate, and the universal wheel assembly can be lifted and installed on the universal wheel mounting seats.

5. The driving mechanism of a transport vehicle according to claim 4, characterized in that: The universal wheel assembly and the universal wheel mounting seat are connected via a longitudinally arranged screw rod and a nut.

6. The driving mechanism of a transport vehicle according to claim 1, characterized in that: Universal wheel mounting seats are arranged on both sides of the floating mounting plate, and the universal wheel assembly is mounted on the universal wheel mounting seats. The universal wheel assembly includes a wheel pressure regulating mechanism for regulating the wheel pressure of the universal wheel.

7. The driving mechanism of a transport vehicle according to claim 6, characterized in that: The universal wheel assembly includes a first bracket and a second bracket, the wheel axle of the universal wheel is rotatably set on the first bracket, and the first bracket is connected to the second bracket by a rotating pin; the first bracket includes a first connecting plate arranged along the longitudinal direction, and the second bracket includes a second connecting plate arranged along the longitudinal direction; the wheel pressure adjustment mechanism includes an adjusting screw, a second spring and a second locking nut, the adjusting screw is arranged horizontally, the second spring is sleeved on the adjusting screw, and one end of the adjusting screw passes through the first connecting plate and the second connecting plate and is connected to the second locking nut.

8. A transport vehicle, characterized in that: A driving mechanism comprising the transport vehicle according to any one of claims 1 to 7.

9. A transport vehicle according to claim 8, characterized in that: The vehicle comprises a pedal, under which a detection device for detecting whether there is a person on the pedal is arranged, and a control device controls the vehicle to start according to a signal fed back by the detection device.

10. A transport vehicle according to claim 9, characterized in that: The detection device is a pressure sensor.

11. The transport vehicle according to claim 9, characterized in that: The detection device is a contact switch, the pedal can swing up and down and is installed on the base, and an elastic buffer is provided between the pedal and the base; when no one is on the pedal, the pedal is supported by the elastic buffer and separated from the contact switch, and the contact switch is disconnected; When someone is on the pedal, the elastic buffer is compressed, the pedal contacts the contact switch, and the contact switch is turned on.

12. The transport vehicle according to claim 8, characterized in that: The seat can be raised and lowered and installed on the frame.

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