A forklift

Abstract

A forklift includes a front wheel base and a front wheel body hinged to the front wheel base. It also includes adjustment assemblies on both sides of the front wheel base. Each adjustment assembly includes a telescopic device and a rear wheel assembly hinged to the first end of the telescopic device. The two telescopic devices can operate independently to drive the corresponding rear wheel assembly to rise or fall respectively, and the horizontal distances between the rotation axes of the two rear wheel assemblies and the front wheel base are different. Because the distances between the two rear wheel assemblies and obstacles are different, one rear wheel assembly can be raised first using one telescopic device, allowing it to pass over the obstacle and then lower to the ground. Then, the other telescopic device can be used to raise the other rear wheel assembly, allowing it to pass over the obstacle and then lower to the ground. This avoids the rear wheels of the forklift colliding with obstacles during the picking process, ensuring that the forklift forks smoothly insert into the bottom of the pallet.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, and in particular to a forklift. Background Technology

[0002] When using manual forklifts or AGVs for pallet handling, problems often arise such as bending and deformation of the wooden slats at the bottom of the pallet due to long-term load-bearing, and dimensional deviations during manufacturing. These quality defects can narrow or deform the forklift aisle space at the bottom of the pallet, making it difficult for the forklift's forks to slide smoothly into the bottom of the pallet. If the operator forcibly pushes the forklift in this situation, the entire pallet is often pushed backward, and the forks still cannot properly insert into the bottom of the pallet, further damaging the wooden slats at the bottom of the pallet. This situation is particularly troublesome when using AGV automated handling systems, because AGVs cannot adjust as flexibly as manual operators, and will stop the operation once they encounter resistance, deeming the pickup a failure. Utility Model Content

[0003] This utility model provides a forklift that avoids the rear wheels of the forklift colliding with the wooden strips at the bottom of the pallet during the picking process, so that the forklift forks can be smoothly inserted into the bottom of the pallet.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A forklift includes a front wheel base and a front wheel body hinged to the front wheel base, and two adjustment assemblies respectively connected to both sides of the front wheel base. The two adjustment assemblies include telescopic devices and rear wheel assemblies hinged to the first end of the telescopic devices. The two telescopic devices can operate independently to drive the corresponding rear wheel assemblies to rotate so as to drive the rear wheel assemblies to rise or fall, and the horizontal distance between the rotation axis of the two rear wheel assemblies and the front wheel base is different.

[0006] Furthermore, the rear wheel assembly includes a rear wheel base and a rear wheel body hinged to the first end of the rear wheel base. The second end of the rear wheel base is hinged to the first end of the telescopic device. The telescopic device drives the corresponding rear wheel base to rotate, thereby raising or lowering the corresponding rear wheel body respectively.

[0007] Furthermore, it also includes a controller and a monitoring device. The monitoring device and the telescopic device are electrically connected to the controller. The monitoring device is used to monitor whether there are obstacles in the direction of movement of the forklift.

[0008] When the monitoring device detects an obstacle in the direction of the forklift's movement, the controller raises and lowers the two rear wheel bodies in sequence, so that the two rear wheel bodies pass over the obstacle in turn.

[0009] Furthermore, the controller is equipped with multiple delay segments, and the monitoring device includes a rear sensor and a front sensor. The rear sensor is used to monitor whether there are obstacles in the movement path when the forklift moves backward, and the front sensor is used to monitor whether there are obstacles in the movement path when the forklift moves forward.

[0010] When the rear or front sensor detects an obstacle on the corresponding movement path, the controller raises and lowers the two rear wheels sequentially according to a preset delay, so that the two rear wheels pass over the obstacle in turn.

[0011] Furthermore, the controller is equipped with multiple distance thresholds, and the monitoring device includes a first sensor, a second sensor, and an encoder located at the front wheel shaft. The encoder is used to count the rotation distance of the front wheel after the first sensor or the second sensor detects an obstacle.

[0012] Based on whether the rotation distance of the front wheel body reaches the distance threshold, the controller raises and lowers the two rear wheel bodies in sequence, so that the two rear wheel bodies pass over the obstacle in turn.

[0013] Furthermore, it also includes a transmission component, the first end of which is hinged to the front wheel base, and the second end of which is hinged to the second end of the telescopic device in each of the two adjustment assemblies. By driving the transmission component to rotate, the two rear wheel assemblies are driven to rotate simultaneously by driving the two telescopic devices, so as to simultaneously control the lifting or lowering of the two rear wheel bodies.

[0014] Furthermore, the transmission component includes a rotating shaft and two crank arms. The crank arms include a first arm and a second arm that are connected to each other. The two ends of the rotating shaft are connected to the connection points of the first arm and the second arm. The ends of the two first arms away from the rotating shaft are hinged to the front wheel base. The ends of the two second arms away from the rotating shaft are respectively hinged to the second ends of the corresponding telescopic devices. The two ends of the rotating shaft are used to hinge to the bracket.

[0015] Furthermore, the bracket is provided with a lifting device between the bracket and the front wheel base, and adjustment components are provided on both sides of the bottom of the bracket. The middle of the rear wheel base is hinged to the bracket, and both ends of the rotating shaft are hinged to the bracket. Thus, the lifting device drives the bracket to rise and fall, thereby driving the transmission component to rotate.

[0016] Furthermore, the bracket includes the vehicle body and fork walls located on both sides of the vehicle body, the adjustment components are respectively located at the bottom of the two fork walls, the rear wheel base is hinged to the fork wall, the two ends of the rotating shaft are hinged to the vehicle body, and the two ends of the lifting device are connected to the vehicle body and the front wheel base.

[0017] Furthermore, the lifting device includes a hydraulic cylinder and a handle connected to the pressurized end of the hydraulic cylinder. The handle is used to switch the working state of the hydraulic cylinder, so that it is in a lifting state or a lowering state.

[0018] The beneficial effects of this utility model are:

[0019] 1. This utility model discloses a forklift, including a front wheel base and a front wheel body hinged to the front wheel base, and adjusting components disposed on both sides of the front wheel base. The adjusting components include telescopic devices and rear wheel assemblies hinged to the first end of the telescopic devices. The two telescopic devices can operate independently to drive the corresponding rear wheel assemblies to rotate, thereby driving the rear wheel bodies to rise or fall. The rotation axes of the two rear wheel assemblies are at different horizontal distances from the front wheel base. Because the distances between the two rear wheel assemblies and obstacles are different, one rear wheel assembly can be raised first by one telescopic device, and after the rear wheel assembly passes over the obstacle, it will fall to the ground. Then, the other telescopic device can be used to raise the other rear wheel assembly, so that it passes over the obstacle and falls to the ground. This avoids the rear wheels of the forklift colliding with obstacles during the picking process, allowing the forklift forks to smoothly insert into the bottom of the pallet.

[0020] 2. The forklift proposed in this utility model also includes a controller and a monitoring device. The monitoring device and the telescopic device are electrically connected to the controller. The monitoring device is used to monitor whether there are obstacles in the direction of movement of the forklift. Based on the monitoring information of the monitoring device, the controller raises and lowers the two rear wheel bodies in sequence, so that the two rear wheel bodies pass over the obstacles in sequence, thereby realizing the automatic raising and lowering of the rear wheel bodies during the movement of the forklift. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a forklift according to the present invention;

[0023] Figure 2 This is an exploded view of a forklift according to the present invention.

[0024] Figure 3 This is one of the schematic diagrams of a forklift in a high-position state according to the present invention;

[0025] Figure 4 This is the second schematic diagram of a forklift in a high-position state according to the present invention;

[0026] Figure 5 This is one of the schematic diagrams of a forklift in a low-position state according to the present invention;

[0027] Figure 6This is the second schematic diagram of a forklift in a low-position state according to the present invention;

[0028] Figure 7 This is one of the schematic diagrams illustrating an obstacle crossing method for a forklift according to this utility model;

[0029] Figure 8 This is the second schematic diagram of an obstacle crossing method for a forklift according to the present invention;

[0030] In the diagram, 101 is the front wheel base; 102 is the front wheel body; 20 is the first adjustment assembly; 201 is the first telescopic device; 202 is the first rear wheel assembly; 2021 is the first rear wheel base; 2022 is the first rear wheel body; 30 is the second adjustment assembly; 301 is the second telescopic device; 302 is the second rear wheel assembly; 3021 is the second rear wheel base; 3022 is the second rear wheel body; 401 is the rear sensor; 40 is the rear wheel body. 2. Front sensor; 50. Transmission component; 501. Rotary shaft; 5021. First crank arm; 5022. Second crank arm; 601. First arm; 602. Second arm; 70. Bracket; 701. Body; 7011. Body body; 70111. Hinge hole; 7012. Platform; 702. Fork wall; 80. Lifting device; 801. Hydraulic base; 802. Hydraulic cylinder; 803. Handle; 804. Pressure relief rod. Detailed Implementation

[0031] The following is combined with Figures 1-8 This utility model will be described in detail.

[0032] A forklift includes a front wheel base 101 and a front wheel body 102 hinged to the front wheel base 101. It also includes two adjustment assemblies respectively connected to both sides of the front wheel base 101. The two adjustment assemblies include telescopic devices and rear wheel assemblies hinged to the first end of the telescopic devices. The two telescopic devices can operate independently to drive the corresponding rear wheel assemblies to rotate so as to raise or lower the rear wheel assemblies. The horizontal distance between the rotation axis of the two rear wheel assemblies and the front wheel base 101 is different.

[0033] Specifically, the adjustment assembly includes a first adjustment assembly 20 and a second adjustment assembly 30. The first adjustment assembly 20 includes a first telescopic device 201 and a first rear wheel assembly 202 hinged to a first end of the first telescopic device 201. Similarly, the second adjustment assembly 30 includes a second telescopic device 301 and a second rear wheel assembly 302 hinged to a first end of the second telescopic device 301. The first telescopic device 201 and the second telescopic device 301 can respectively drive the first rear wheel assembly 202 and the second rear wheel assembly 302 to rotate so as to drive the rear wheel body to rise or fall.

[0034] The configurations of the first adjustment component 20 and the second adjustment component 30 are basically the same, the difference being that, for example... Figure 2As shown, the distance between the rotation axis of the first rear wheel assembly 202 and the rotation axis of the front wheel body 102 is L1, and the distance between the rotation axis of the second rear wheel assembly 302 and the rotation axis of the front wheel body 102 is L2. L1 and L2 are not equal. Furthermore, in this embodiment, L1 is greater than L2.

[0035] Since L1 and L2 are not equal, the distances between the first rear wheel assembly 202 and the second rear wheel assembly 302 and the obstacle are different. Therefore, the corresponding rear wheel assembly can be lifted first by one of the telescopic devices. After the rear wheel assembly passes the obstacle, it will descend and touch the ground. At this time, the other rear wheel assembly can be lifted by the other telescopic device, so that it passes the obstacle and descends and touches the ground. This avoids the rear wheels of the forklift from colliding with the obstacle during the picking process, and allows the forklift forks 702 to be smoothly inserted into the bottom of the pallet.

[0036] like Figure 2 As shown, the rear wheel assembly includes a rear wheel base and a rear wheel body hinged to a first end of the rear wheel base. The second end of the rear wheel base is hinged to a first end of a telescopic device. The telescopic device drives the corresponding rear wheel base to rotate, thereby raising or lowering the corresponding rear wheel body. Specifically, the first rear wheel assembly 202 includes a first rear wheel base 2021 and a first rear wheel body 2022 hinged to a first end of the first rear wheel base 2021, and the second rear wheel assembly 302 includes a second rear wheel base 3021 and a second rear wheel body 3022 hinged to a first end of the second rear wheel base 3021.

[0037] The forklift also includes a controller and a monitoring device. The monitoring device and the telescopic device are electrically connected to the controller. The monitoring device is used to monitor whether there are obstacles in the forklift's direction of movement. Based on the monitoring information from the monitoring device, the controller sequentially raises and lowers the two rear wheel bodies, allowing the two rear wheel bodies to pass over obstacles in turn. The controller may include programmable logic controllers (PLCs), microcontrollers (MCNs), etc., while the monitoring device includes capacitive sensors, infrared sensors, and laser sensors, as well as other types of sensors that can be used to determine whether there are obstacles in the movement path.

[0038] The controller incorporates multiple delay segments. The monitoring device includes a rear sensor 401 and a front sensor 402. The rear sensor 401 monitors for obstacles in the forklift's path when it moves backward; the front sensor 402 monitors for obstacles in the forklift's path when it moves forward. The rear sensor 401 is located behind the rear wheel assembly with the longer distance between its rotation axis and the front wheel's rotation axis. The front sensor 402 is located in front of the rear wheel assembly with the shorter distance between its rotation axis and the front wheel's rotation axis. Figure 3 , Figure 5 as well as Figure 7As shown. Specifically, the rear sensor 401 is located on the rear side of the first rear wheel assembly 202, and the front sensor 402 is located on the front side of the second rear wheel assembly 302, wherein the directions of the front and rear sides are as follows: Figure 3 , Figure 5 as well as Figure 7 As shown in the figures, the definitions of front and rear sides apply to other figures in this embodiment.

[0039] As the forklift moves backward, i.e., during the process of the fork arm 702 inserting into the bottom of the pallet, the rear sensor 401 detects an obstacle in the movement path. The controller first retracts the first telescopic device 201 to rotate the first rear wheel assembly 202, causing the first rear wheel body 2022 to rise. Figure 7 As shown. After the first rear wheel body 2022 passes the obstacle, i.e., after time T1, the controller extends the first telescopic device 201 to rotate the first rear wheel assembly 202, causing the first rear wheel body 2022 to descend. The forklift continues to move backward, i.e., after time T2, the controller retracts the second telescopic device 301 to rotate the second rear wheel assembly 302, causing the second rear wheel body 3022 to rise. After the second rear wheel body 3022 passes the obstacle, i.e., after time T3, the controller extends the second telescopic device 301 again to rotate the second rear wheel assembly 302, causing the second rear wheel body 3022 to descend.

[0040] When the forklift moves forward, that is, when the fork wall 702 is disengaged from the bottom of the pallet, the front sensor 402 detects an obstacle in the movement path. The control logic of the controller is the opposite of the previous one, that is, first control the second telescopic device 301 to drive the second rear wheel assembly 302 to rotate, and then control the first telescopic device 201 to drive the first rear wheel assembly 202 to rotate.

[0041] As can be seen, during the process of the forklift inserting into and disengaging from the bottom of the pallet, the controller, through delays T1, T2, and T3 set within the controller, simultaneously raises and lowers the first rear wheel body 2022 and the second rear wheel body 3022 sequentially based on monitoring information from the rear sensor 401 and the front sensor 402, respectively, ensuring that the first rear wheel body 2022 and the second rear wheel body 3022 pass over the obstacle in sequence. In use, the delay can be appropriately increased to ensure that the rear wheel body completely passes over the obstacle.

[0042] In other embodiments, the controller includes multiple distance thresholds, including S1, S2, and S3. The monitoring device includes a first sensor, a second sensor, and an encoder located at the axle of the front wheel body 102. The encoder is used to count the rotation distance of the front wheel body 102 after the first or second sensor detects an obstacle. This solution is suitable for AGV (Automated Guided Vehicle) forklifts.

[0043] As the forklift moves backward, i.e., during the process of the fork arm 702 inserting into the bottom of the pallet, when the first sensor detects an obstacle in the movement path, the controller first retracts the first telescopic device 201 to rotate the first rear wheel assembly 202, causing the first rear wheel body 2022 to rise. Simultaneously, the controller begins to calculate the rotation distance of the front wheel body 102. When the rotation distance is greater than S1, the first rear wheel body 2022 has passed the obstacle, and the controller then extends the first telescopic device 201 to rotate the first rear wheel assembly 202, causing the first rear wheel body 2022 to fall. The forklift continues to move backward. At this point, the rotation distance of the second rear wheel body 3022 is greater than S2, and the second rear wheel body 3022 approaches the obstacle. The controller then retracts the second telescopic device 301 to rotate the second rear wheel assembly 302, causing the second rear wheel body 3022 to rise. When the rotation distance of the front wheel body 102 is greater than S3, the controller extends the second telescopic device 301 to rotate the second rear wheel assembly 302, causing the rear wheel body to fall.

[0044] When the forklift moves forward, that is, when the fork wall 702 is disengaged from the bottom of the pallet, the second sensor detects an obstacle in the movement path. The control logic of the controller is the opposite of the previous one, that is, first control the second telescopic device 301 to drive the second rear wheel assembly 302 to rotate, and then control the first telescopic device 201 to drive the first rear wheel assembly 202 to rotate.

[0045] As can be seen, during the process of the forklift inserting into and detaching from the bottom of the pallet, the controller determines the position of the first rear wheel body 2022 and the second rear wheel body 3022 by using multiple built-in distance thresholds, thereby sequentially raising and lowering the first rear wheel body 2022 and the second rear wheel body 3022, allowing them to pass over obstacles in sequence. Furthermore, the first sensor, the second sensor, the rear sensor 401, and the front sensor 402 can be sensors of the same model.

[0046] The forklift also includes a transmission component 50. The first end of the transmission component 50 is hinged to the front wheel base 101, and the second end of the transmission component 50 is respectively hinged to the second end of the first telescopic device 201 in the first adjustment assembly 20 and the second end of the second telescopic device 301 in the second adjustment assembly 30. By driving the transmission component 50 to rotate, the first telescopic device 201 and the second telescopic device 301 are simultaneously driven, thereby driving the first rear wheel assembly 202 and the second rear wheel assembly 302 to rotate simultaneously, so as to control the first rear wheel body 2022 and the second rear wheel body 3022 to rise or fall simultaneously.

[0047] The transmission component 50 includes a rotating shaft 501 and two crank arms, namely a first crank arm 5021 and a second crank arm 5022. Both the first crank arm 5021 and the second crank arm 5022 include a first arm 601 and a second arm 602 connected to each other. The two ends of the rotating shaft 501 are connected to the first crank arm 5021 and the second crank arm 5022. Furthermore, the two ends of the rotating shaft 501 are respectively connected to the connection points between the first arm 601 and the second arm 602. Figure 6 As shown. The ends of the two first arms 601 away from the pivot 501 are hinged to the two sides of the front wheel base 101, and the ends of the two second arms 602 away from the pivot 501 are respectively hinged to the second ends of the first telescopic device 201 and the second telescopic device 301. The two ends of the pivot 501 are used to hinge to the bracket 70.

[0048] The forklift also includes a bracket 70, with a lifting device 80 between the bracket 70 and the front wheel base 101. Adjustment components are located on both sides of the bottom of the bracket 70. The middle of the rear wheel base is hinged to the bracket 70, allowing the middle of the rear wheel base to rotate relative to the bracket 70. Both ends of the pivot 501 are hinged to the bracket 70, thereby driving the bracket 70 to rise and fall via the lifting device 80. This, in turn, drives the transmission component 50 to rotate. The rotation of the transmission component 50 drives the first crank arm 5021 and the second crank arm 5022 to move backward or forward, thereby pushing the first telescopic device 201 and the second telescopic device 301 to move as a whole. This simultaneously drives the first rear wheel assembly 202 and the second rear wheel assembly 302 to rotate relative to the bracket 70, causing both rear wheel bodies to rise or fall simultaneously.

[0049] The bracket 70 includes a body 701 and fork walls 702 located on both sides of the bottom of the body 701. Adjustment components are respectively located at the bottom of the two fork walls 702. The first rear wheel assembly 202 and the rear wheel base in the first rear wheel assembly 202 are hinged to the fork walls 702. Hinge holes 70111 are provided on both sides of the body 701. The two ends of the pivot 501 are hinged to the body 701. The body 701 includes a body body 7011 and a platform 7012 located on the top of the body body 7011 and extending away from the fork walls 702. The two ends of the lifting device 80 are connected to the platform 7012 and the front wheel base 101.

[0050] The lifting device 80 includes a hydraulic base 801 and a handle 803 hinged to the hydraulic base 801. The hydraulic base 801 is equipped with a hydraulic cylinder 802. The handle 803 is connected to the pressurizing end of the hydraulic cylinder 802. The handle 803 is used to switch the working state of the hydraulic cylinder 802, placing it in a lifting state or a lowering state. The handle 803 is also equipped with a pressure relief rod 804 for depressurizing the hydraulic cylinder 802. The working principle of pressurizing the hydraulic cylinder 802 through the handle 803 and depressurizing the hydraulic cylinder 802 through the pressure relief rod 804 is a conventional technical means and will not be described in detail here. The first end of the hydraulic cylinder 802 is hinged to the platform 7012, and the second end of the hydraulic cylinder 802 is circumferentially limited and connected to the front wheel base 101. Thus, by rotating the hydraulic cylinder 802 through the handle 803, the front wheel base 101 is driven to rotate, thereby changing the direction of movement of the forklift.

[0051] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A forklift, comprising a front wheel base and a front wheel body hinged to the front wheel base, characterized in that, It also includes two adjustment components connected to both sides of the front wheel base. The two adjustment components include a telescopic device and a rear wheel assembly hinged to the first end of the telescopic device. The two telescopic devices can operate independently to drive the corresponding rear wheel assembly to rotate, thereby driving the rear wheel assembly to rise or fall. The horizontal distance between the rotation axis of the two rear wheel assemblies and the front wheel base is different.

2. A forklift as described in claim 1, characterized in that, The rear wheel assembly includes a rear wheel base and a rear wheel body hinged to a first end of the rear wheel base. The second end of the rear wheel base is hinged to the first end of the telescopic device. The telescopic device drives the corresponding rear wheel base to rotate, thereby raising or lowering the corresponding rear wheel body.

3. A forklift as described in claim 2, characterized in that, It also includes a controller and a monitoring device, wherein the monitoring device and the telescopic device are electrically connected to the controller, and the monitoring device is used to monitor whether there are obstacles in the direction of movement of the forklift; When the monitoring device detects an obstacle in the direction of the forklift's movement, the controller sequentially raises and lowers the two rear wheel bodies, so that the two rear wheel bodies pass over the obstacle in turn.

4. A forklift as described in claim 3, characterized in that, The controller has multiple delay segments, and the monitoring device includes a rear sensor and a front sensor. The rear sensor is used to monitor whether there are obstacles in the movement path when the forklift moves backward, and the front sensor is used to monitor whether there are obstacles in the movement path when the forklift moves forward. When the rear sensor or the front sensor detects an obstacle on the corresponding movement path, the controller raises and lowers the two rear wheel bodies sequentially according to a preset delay, so that the two rear wheel bodies pass over the obstacle in turn.

5. A forklift as described in claim 4, characterized in that, The controller has multiple distance thresholds, and the monitoring device includes a first sensor, a second sensor, and an encoder located at the front wheel shaft. The encoder is used to count the rotation distance of the front wheel after the first sensor or the second sensor detects an obstacle. The controller raises and lowers the two rear wheels sequentially based on whether the rotation distance of the front wheel body reaches the distance threshold, so that the two rear wheels body pass over the obstacle in turn.

6. A forklift as described in claim 2, characterized in that, It also includes a transmission component, the first end of which is hinged to the front wheel base, and the second end of which is respectively hinged to the second end of the telescopic device in the two adjustment assemblies; by driving the transmission component to rotate, the two telescopic devices are simultaneously driven, thereby driving the two rear wheel assemblies to rotate, so as to simultaneously control the lifting or lowering of the two rear wheel bodies.

7. A forklift as described in claim 6, characterized in that, The transmission component includes a rotating shaft and two crank arms. Each crank arm includes a first arm and a second arm that are connected to each other. Both ends of the rotating shaft are connected to the connection point of the first arm and the second arm. The ends of the two first arms away from the rotating shaft are hinged to the front wheel base. The ends of the two second arms away from the rotating shaft are respectively hinged to the second end of the corresponding telescopic device. Both ends of the rotating shaft are used to hinge to the bracket.

8. A forklift as described in claim 7, characterized in that, The device includes a bracket, a lifting device between the bracket and the front wheel base, and adjustment components on both sides of the bottom of the bracket. The middle part of the rear wheel base is hinged to the bracket, and both ends of the rotating shaft are hinged to the bracket. Thus, the lifting device drives the bracket to rise and fall, thereby driving the transmission component to rotate.

9. A forklift as described in claim 8, characterized in that, The bracket includes a vehicle body and fork walls located on both sides of the vehicle body. The adjustment components are respectively located at the bottom of the two fork walls. The rear wheel base is hinged to the fork walls. The two ends of the rotating shaft are hinged to the vehicle body. The two ends of the lifting device are connected to the vehicle body and the front wheel base.

10. A forklift as described in claim 8 or 9, characterized in that, The lifting device includes a hydraulic cylinder and a handle connected to the pressurized end of the hydraulic cylinder. The handle is used to switch the working state of the hydraulic cylinder, so that it is in a lifting state or a lowering state.

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