Forklift

Abstract

The utility model provides a forklift which comprises a forklift body provided with a driving source. The fork arm assembly is arranged on one side of the vehicle body and comprises a connecting part connected with the driving source; the extension arm is fixedly arranged at the lower end of the connecting part, a mounting groove is formed in the bottom of the extension arm, and a load wheel set is pivotally connected to the mounting groove; the rotating piece is pivotally arranged on the connecting part and is hinged with the vehicle body; the transmission part is provided with a first end and a second end which are opposite, the first end is hinged to the rotating part, and the second end is hinged to the load wheel set; when the driving source drives the connecting part to lift, the rotating part rotates along with the lifting of the connecting part and drives the transmission part to swing so as to drive the load wheel set to pivotally extend out of the mounting groove and abut against the ground, and the cargo tray is jointly borne by the vehicle body and the load wheel set. When the driving source drives the connecting part to descend, the rotating part rotates reversely along with descending of the connecting part and drives the transmission part to swing reversely, so that the load wheel set is driven to reversely pivot and retract into the mounting groove, and the mounting groove of the extension arm is suspended.

Description

Technical Field

[0001] This utility model relates to the field of intelligent logistics equipment technology, and in particular to a forklift structure suitable for grid-shaped pallet trays. Background Technology

[0002] Forklifts are increasingly being used in material handling scenarios such as warehousing and production lines.

[0003] Existing forklifts are generally forklifts with forks or forks with front forks. However, these forklifts still face the following defects when adapting to standard grid pallets (i.e., the "grid" structure with transverse partitions at the bottom of the pallet): (1) Forklifts with forks usually integrate fixed wheels on the forks to ensure movement stability. However, when this type of forklift picks up a grid pallet, the wheels at the bottom will physically interfere with the transverse partitions at the bottom of the pallet, making it impossible to complete the insertion action and thus unsuitable for grid pallets. (2) Forklifts with front forks directly insert the forks into the gaps between the pallets to achieve transportation. Although they can adapt to grid pallets, their forks will generate a large overturning moment when carrying goods. In order to balance the moment, a large counterweight is usually loaded at the rear of the vehicle, which leads to a significant increase in the weight and size of the vehicle, making it unsuitable for narrow spaces.

[0004] Therefore, it is necessary to design a new type of forklift to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of this utility model is to provide a forklift in which the load wheel set at the front end of the fork arm assembly can be extended or retracted. When unloaded, the load wheel set at the front end of the fork arm assembly is retracted and lifted off the ground, and the front end of the extension arm is suspended in the air and can pass through the cross gap of the cross pallet to avoid interference. When loaded, the load wheel set is lowered and the height of the fork arm is raised. The load wheel and the vehicle body directly bear the weight of the goods without the need for additional counterweight balance, and it can be adapted to narrow spaces.

[0006] To achieve the above objectives, this utility model provides a forklift, including a vehicle body and a drive source;

[0007] A fork arm assembly, located on one side of the vehicle body, includes: a connecting part connected to the drive source; and an extension arm fixedly disposed at the lower end of the connecting part. The bottom of the extension arm has a mounting groove, and a load wheel assembly is pivotally connected to the mounting groove.

[0008] A rotating component, pivotally mounted on the connecting portion and hinged to the vehicle body; and

[0009] The transmission component has a first end and a second end opposite to each other, the first end being hinged to the rotating component and the second end being hinged to the load wheel assembly;

[0010] When the drive source drives the connecting part to lift, the rotating part rotates with the lifting of the connecting part and drives the transmission part to swing, so as to drive the load wheel set to pivot out of the mounting groove and press against the ground, so that the vehicle body and the load wheel set can jointly carry the cargo pallet.

[0011] When the drive source drives the connecting part to descend, the rotating part rotates in the opposite direction as the connecting part descends, and drives the transmission part to swing in the opposite direction, so as to drive the load wheel set to pivot in the opposite direction and retract to the mounting groove, thereby suspending the mounting groove of the extension arm.

[0012] Preferably, the bottom rear end of the extension arm is connected to a support wheel assembly, the bottom front end of the extension arm is connected to the load wheel assembly, the rear end is close to the connecting part, and the front end is far from the connecting part;

[0013] When the connecting part is raised, the fork arm assembly rotates based on the support wheel set supported on the ground, the load wheel set pivots out of the mounting groove and presses against the ground, and further lifts the extension arm, and the support wheel set is lifted off the ground;

[0014] When the connecting part descends, the fork arm assembly rotates in the opposite direction based on the load wheel set supported on the ground. The rotating member rotates in the opposite direction and drives the load wheel set to pivot upward and retract into the mounting slot through the transmission member, so that the support wheel set touches the ground and the front end of the extension arm is suspended in the air.

[0015] Preferably, there are two extension arms, which are flush with each other and symmetrically arranged at the lower end of the connecting portion;

[0016] There are two transmission components, and the load wheel assembly on each of the extension arms is connected to the rotating component through the corresponding transmission component.

[0017] Preferably, the rotating element includes:

[0018] The rotating shaft is horizontally mounted on the connecting part via a bearing;

[0019] A first guide rod is located between the vehicle body and the connecting part, with one end connected to the rotating shaft and the other end hinged to the vehicle body; and,

[0020] The second guide rod has one end connected to the rotating shaft and the other end hinged to the first end of the transmission component; and the second guide rod is circumferentially fixed relative to the first guide rod.

[0021] Preferably, the transmission component is a connecting rod, which passes through the extension arm, and the first end of the connecting rod is hinged to the second guide rod.

[0022] Preferably, the load wheel assembly includes a wheel frame axle, a wheel frame, and a load wheel;

[0023] The wheel frame shaft is hinged to the second end of the connecting rod, the wheel frame is pivotally mounted in the mounting groove, and the load wheel is rotatably mounted on the wheel frame;

[0024] The first end of the connecting rod moves with the rotation of the rotating shaft, and the second end of the connecting rod drives the wheel frame shaft of the load wheel assembly to move, so that the wheel frame rotates around the pivot point in the mounting groove, thereby pivoting the load wheel out or retracting it into the mounting groove.

[0025] Preferably, the connecting part is a connecting plate, which is located between the vehicle body and the extension arm;

[0026] The top of the connecting plate is connected to the output end of the drive source, and the extension arm is installed at the bottom of the connecting plate.

[0027] Preferably, the support wheel assembly includes:

[0028] The base is fixed to the bottom of the extension arm; and

[0029] The support wheel is rotatably mounted on the base.

[0030] Preferably, the drive source is a hydraulic cylinder, the output end of which is connected to the connecting part of the fork arm assembly.

[0031] Preferably, the bottom of the vehicle body is provided with at least one set of drive wheels.

[0032] Compared with the prior art, the forklift provided by this utility model has a load wheel set that can pivotally extend or retract into the mounting slot at the bottom of the extension arm. Through the cooperation of the rotating and transmission components, the lifting motion of the fork arm assembly is converted into the pivoting motion of the load wheel set. After the load wheel set is extended into place, the weight of the goods is jointly borne by the load wheel set and the vehicle body. The vehicle body does not need a rear counterweight, which improves the structural stability when carrying heavy loads. When the load wheel set is retracted into the mounting slot, the extension arm can pass through the cross-section gap of the grid pallet to avoid interference and effectively adapt to the grid-shaped pallet. The forklift has a compact and lightweight structure, which can effectively improve the efficiency of warehouse stacking. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a forklift structure according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the fork arm assembly of a forklift in a first position according to an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the fork arm assembly of a forklift in a critical position according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the fork arm assembly of a forklift in a second position according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram showing the interaction between the fork arm assembly of a forklift in the first position and the cargo pallet according to an embodiment of the present invention.

[0038] Figure 6 This is a schematic diagram showing the interaction between the fork arm assembly of a forklift and the cargo pallet at a critical position according to an embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of the fork arm assembly of a forklift in the second position, according to an embodiment of the present invention, when loaded with a cargo pallet. Detailed Implementation

[0040] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0041] Certain terms are used in the specification and claims to refer to specific elements. It will be understood by those skilled in the art that manufacturers may use different names to refer to the same element. This specification and claims do not distinguish elements by differences in name, but rather by differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to".

[0042] Reference Figure 1 The diagram shows a schematic representation of a forklift structure according to an embodiment of the present invention.

[0043] The forklift described above includes a body 1, a fork arm assembly 2, a rotating component 3, and a transmission component 4. The bottom of the body 1 is provided with a power wheel set 10 (e.g., drive wheels and steering wheels) to provide moving power; a drive source 11 is installed inside the body 1. In this embodiment, the drive source 11 is, for example, a hydraulic cylinder, but is not limited thereto. The output end of the drive source 11 is connected to the fork arm assembly 2.

[0044] The fork arm assembly 2 is disposed on one side of the vehicle body 1, and includes a connecting part 21 and an extension arm 22. The connecting part 21 is integrally formed with the extension arm 22, or the extension arm 22 is mounted on the connecting part 21. The connecting part 21 can rigidly support the extension arm 22. The drive source 11 is connected to the connecting part 21 to drive it to lift or lower. The extension arm 22 can be inserted into the cross-shaped pallet T that carries the goods. A mounting groove is formed at the bottom of the front end (the end away from the connecting part 21), and a load wheel set 5 is pivotally mounted in the mounting groove.

[0045] The aforementioned rotating member 3 is mounted on the connecting portion 21 of the fork arm assembly 2 and can rotate circumferentially around its own axis, and the rotating member 3 is hinged to the vehicle body 1. The aforementioned transmission member 4 has a first end and a second end opposite to each other, the first end being hinged to the rotating member 3 and the second end being hinged to the aforementioned load wheel set 5.

[0046] Among them, the aforementioned driving source 11 can drive the connecting part 21 to the first position ( Figure 2 ) rise to the second position ( Figure 4 ), or it may drop from the second position to the first position.

[0047] When the fork arm assembly 2 is raised from the first position to the second position, the rotating member 3 rotates with the lifting action of the connecting part 21, and drives the transmission member 4 to swing. The transmission member 4 drives the load wheel set 5 to pivot downward until the load wheel set 5 is fully extended and presses against the ground S to form a support point. The load wheel set 5 raises the extension arm 22 and can assist the fork arm assembly 2 in carrying the cargo pallet T. The weight of the cargo is directly transmitted to the ground S through the load wheel set 5. The forklift structure is lightweight and can adapt to narrow spaces.

[0048] When the fork arm assembly 2 descends from the second position to the first position, the rotating member 3 rotates in the opposite direction due to the descent of the connecting part 21, and drives the load wheel assembly 5 to pivot upward through the transmission member 4 until it is completely retracted into the mounting groove.

[0049] Thus, when the forklift is unloaded, the forklift assembly 2 is in the first position, and the load wheel set 5 at the front end of the forklift assembly 2 pivots and retracts into the mounting slot of the extension arm 22. The extension arm 22 can pass through the cross-section gap of the T-shaped pallet to avoid interference. When the forklift is loaded, the forklift assembly 2 is in the second position, and the load wheel set 5 pivots and falls down to bear the weight of the goods without the need for additional counterweight balance, making it suitable for narrow spaces.

[0050] like Figure 1 As shown, a support wheel assembly 6 is fixed to the rear end of the aforementioned extension arm 22 (the end near the connecting part 21).

[0051] Specifically, firstly, combining Figure 2 and Figure 5 As shown, this is the forklift fork insertion stage (fork arm assembly 2 inserts into pallet T), as follows: Figure 2 The fork arm assembly 2 is in the first position, the hydraulic cylinder drive source 11 is in the retracted state, the fork arm assembly 2 is lowered to the lowest position, the power wheel set 10 and the support wheel set 6 are in contact with the ground S, and the load wheel set 5 is completely retracted into the mounting groove and is in a suspended state. Figure 5When the forklift travels to the front of the grid pallet T, the extension arm 22 is horizontally aligned with the gap between the transverse partitions of the grid pallet T. Then, the vehicle body 1 moves forward, and the front end of the extension arm 22 (without interference from the load wheel set 5) can smoothly insert into the gap of the pallet T until the grid pallet T is completely fitted into the extension arm 22 without causing physical interference.

[0052] Secondly, combining Figure 3 and Figure 6 As shown, this is the lifting transition stage of the fork arm assembly 2, at which time the connecting part 21 moves from the first position ( Figure 2 ) rise to the critical position ( Figure 3 The drive source 11 drives the connecting part 21 to lift, and the connecting part 21 of the fork arm assembly 2 is lifted so that... Figures 2-7 From the perspective of the fork arm assembly 2, the support wheel assembly 6 rotates clockwise around the fulcrum. At the same time, the rotating member 3 rotates counterclockwise around the circumference based on the lifting action of the connecting part 21, thereby driving the transmission member 4 to push towards the front end of the extension arm 22 (the end away from the connecting part 21), so as to drive the load wheel assembly 5 to pivot. The load wheel 52 extends out of the mounting groove until it contacts the ground S. At this time, the support wheel assembly 6 and the load wheel assembly 5 simultaneously contact the ground S.

[0053] Furthermore, combined Figure 4 and Figure 7 As shown, this is the movement phase after the forklift carries the pallet T. At this time, the fork arm assembly 2 is at the aforementioned critical position ( Figure 3 ) to the second position ( Figure 4 ),like Figure 4 The hydraulic cylinder drive source 11 continues to extend until the hydraulic cylinder is pushed out to the preset stroke (the preset stroke can be the maximum stroke of the hydraulic cylinder). The load wheel assembly 5 further pivots downward until the load wheel 52 is fully extended out of the mounting slot. The load wheel assembly 5 further presses against the ground S and lifts the extension arm 22 upward. At this time, the aforementioned support wheel assembly 6 is lifted off the ground S and is in a suspended state. The load wheel assembly 5 forms a new support point, which, together with the power wheel assembly 10, supports the fork arm assembly 2 on both sides. Since both ends of the fork arm assembly 2 are lifted simultaneously, the fork arm assembly 2 as a whole is lifted relative to the ground S, which can assist the fork arm assembly 2 in carrying the cargo pallet T off the ground S. The torque is distributed without the need to set additional counterweights on the vehicle body 1. Since the cargo pallet T is lifted off the ground S, the vehicle body 1 can carry the cargo pallet T to the target cargo location. The weight of the cargo is directly transmitted to the ground S through the power wheel assembly 10 and the load wheel assembly 5, which can stabilize the transportation and effectively prevent the vehicle body 1 from tipping over.

[0054] Finally, understandably, after reaching the target location, during the forklift retraction (removal of pallet T) phase, drive source 11 drives fork arm assembly 2 to descend from the second position to the first position. Fork arm assembly 2 rotates counterclockwise, rotating component 3 rotates clockwise circumferentially, and drives transmission component 4 to swing towards the rear end of extension arm 22, causing load wheel set 5 to gradually retract from fully extended to the mounting slot. Support wheel set 6 gradually transitions from suspended to grounded and reset. At this time, control the forklift to retreat. Since load wheel set 5 is fully retracted to avoid interference, extension arm 22 smoothly exits from the gap of cargo pallet T.

[0055] In one embodiment, the connecting part 21 is a vertically arranged connecting plate, the top of which is fixed to the output end of the drive source 11, and two flush extension arms 22 are symmetrically installed at the bottom. Two transmission components 4 are also provided, wherein the load wheel set 5 on each extension arm 22 is respectively connected to the rotating component 3 via the corresponding transmission component 4.

[0056] Furthermore, refer to Figure 1 As shown, the rotating component 3 includes a rotating shaft 30, a first guide rod 31, and a second guide rod 32. The rotating shaft 30 is horizontally mounted on the connecting plate via a bearing, with its axis perpendicular to the extension direction of the extension arm 22. The first guide rod 31 is located between the vehicle body 1 and the connecting part 21, with one end connected to the rotating shaft 30 and the other end hinged to the vehicle body 1. One end of the second guide rod 32 is connected to the rotating shaft 30, and the other end is hinged to the first end of the transmission component 4. In one possible embodiment, the first guide rod 31 and the second guide rod 32 are circumferentially fixed to transmit torque, and the first guide rod 31 and the second guide rod 32 are approximately perpendicular to each other to convert the displacement of the connecting part 21 in the approximately vertical direction into the displacement of the transmission component 4 in the approximately horizontal direction. The transmission component 4 is a connecting rod, and the bottom of the extension arm 22 has an opening groove along its extension direction. The opening groove preferably communicates with the mounting groove, and the connecting rod passes through the opening groove, with the first end of the connecting rod hinged to the rotating shaft 30. The aforementioned load wheel assembly 5 includes a wheel frame axle 50, a wheel frame 51, and a load wheel 52. The wheel frame axle 50 is rotatably mounted on the second end of the connecting rod. The wheel frame 51 is pivotally mounted in the mounting groove and can pivotally extend / retract within the mounting groove. The load wheel 52 is rotatably mounted on the wheel frame 51. Furthermore, the aforementioned support wheel assembly 6 includes a base and a support wheel. The base is located at the bottom of the extension arm 22, and the support wheel is horizontally mounted on the base via an axle, with its axis perpendicular to the extension direction of the extension arm 22.

[0057] Specifically, combined Figures 2 to 4 As shown, the connecting part 22 is in the first position (e.g. Figure 2When the fork arm assembly 2 is lowered to its lowest position, the power wheel assembly 10 and the support wheel assembly 6 contact the ground S, the load wheel assembly 5 is completely retracted into the mounting slot, the extension arm 22 is horizontal, and the gap between the bottom surface of the front end of the extension arm 22 and the ground S is small, so that it can be inserted into the gap of the transverse partition of the grid pallet T.

[0058] When the drive source 11 drives the fork arm assembly 2 to rise from the first position to the critical position (such as...) Figure 3 During the process, the drive source 11 drives the connecting part 21 to rise, and the fork arm assembly 2 rotates clockwise around the support wheel set 6. When the connecting part 21 of the fork arm assembly 2 rises, the first guide rod 31 swings counterclockwise upward around the hinge point with the vehicle body 1, driving the rotating shaft 30 to rotate counterclockwise, and then pushes the connecting rod of the transmission component 4 to swing forward through the second guide rod 32. When the connecting rod moves, its second end drives the wheel frame shaft 50 to move, forcing the wheel frame 51 to pivot downward until the critical position, when the load wheel set 5 gradually extends out of the mounting groove and contacts the ground S. At this time, the drive wheel set 10, the support wheel set 6, and the load wheel set 5 simultaneously contact the ground S, and the front end of the extension arm 22 tilts slightly downward.

[0059] When the drive source 11 drives the fork arm assembly 2 to continue rising from the above critical position to the second position (such as... Figure 4 During the process of lifting the fork arm assembly 2, the first guide rod 31 swings counterclockwise upwards around the hinge point with the vehicle body 1, causing the rotating shaft 30 to rotate counterclockwise. The second guide rod 32 continues to push the connecting rod of the transmission component 4 to swing forward. The second end of the connecting rod drives the wheel frame shaft 50 to move, forcing the wheel frame 51 to pivot further downwards until the load wheel set 5 is fully pivoted, extends out of the mounting slot, and presses against the ground S. The load wheel set 5 also lifts the extension arm 22. Since both ends of the fork arm assembly 2 are lifted simultaneously, the support wheel set 6 is lifted off the ground and is in a suspended state. At this time, the power wheel set 10 and the load wheel set 5 contact the ground S, and the extension arm 22 returns to a roughly horizontal state. It can be understood that when the fork arm assembly 2 is lowered from the second position to the first position (i.e., from the second position to the first position), the fork arm assembly 2 is lowered from the second position to the first position. Figure 4 Status to Figure 3 Status to Figure 2 (State), the actions of the first guide rod 31, the rotating shaft 30, the second guide rod 32, the transmission component 4, and the load wheel group 5 are the reverse of the above process, and will not be repeated here.

[0060] In summary, the forklift provided by this utility model has a compact and lightweight structure. Through the linkage design of the drive source 11, rotating component 3, and transmission component 4, the load wheel assembly 5 can adaptively extend / retract during the lifting and lowering of the fork arm assembly 2. When the forklift is unloaded, the load wheel assembly 5 can retract into the mounting slot to pass through the pallet T gap; when the load is lifted, the load wheel assembly 5 extends into place, allowing the weight of the goods to be directly transferred to the ground S through the load wheel assembly 5, eliminating the need for a rear counterweight on the vehicle body 1. This improves structural stability during heavy-duty handling, makes it suitable for confined spaces, and effectively improves handling efficiency.

[0061] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A forklift, characterized in that, include: The vehicle body is equipped with a drive source; A fork arm assembly, located on one side of the vehicle body, includes: a connecting part connected to the drive source; and an extension arm fixedly disposed at the lower end of the connecting part. The bottom of the extension arm has a mounting groove, and a load wheel assembly is pivotally connected to the mounting groove. A rotating component, pivotally mounted on the connecting portion and hinged to the vehicle body; and The transmission component has a first end and a second end opposite to each other, the first end being hinged to the rotating component and the second end being hinged to the load wheel assembly; When the drive source drives the connecting part to lift, the rotating part rotates with the lifting of the connecting part and drives the transmission part to swing, so as to drive the load wheel set to pivot out of the mounting groove and press against the ground, so that the vehicle body and the load wheel set can jointly carry the cargo pallet. When the drive source drives the connecting part to descend, the rotating part rotates in the opposite direction as the connecting part descends, and drives the transmission part to swing in the opposite direction, so as to drive the load wheel set to pivot in the opposite direction and retract to the mounting groove, thereby suspending the mounting groove of the extension arm.

2. The forklift as described in claim 1, characterized in that, The rear end of the extension arm is connected to a support wheel assembly, and the front end of the extension arm is connected to a load wheel assembly. The rear end is close to the connecting part, and the front end is away from the connecting part. When the connecting part is raised, the fork arm assembly rotates based on the support wheel set supported on the ground, the load wheel set pivots out of the mounting groove and presses against the ground, and further lifts the extension arm, and the support wheel set is lifted off the ground; When the connecting part descends, the fork arm assembly rotates in the opposite direction based on the load wheel set supported on the ground. The rotating member rotates in the opposite direction and drives the load wheel set to pivot upward and retract into the mounting slot through the transmission member, so that the support wheel set touches the ground and the front end of the extension arm is suspended in the air.

3. The forklift as described in claim 1, characterized in that, The extension arm has two arms, which are flush with each other and symmetrically arranged at the lower end of the connecting part; There are two transmission components, and the load wheel assembly on each of the extension arms is connected to the rotating component through the corresponding transmission component.

4. The forklift as described in claim 1, characterized in that, The rotating component includes: The rotating shaft is horizontally mounted on the connecting part via a bearing; A first guide rod is located between the vehicle body and the connecting part, with one end connected to the rotating shaft and the other end hinged to the vehicle body; and, The second guide rod has one end connected to the rotating shaft and the other end hinged to the first end of the transmission component; and the second guide rod is circumferentially fixed relative to the first guide rod.

5. The forklift as described in claim 4, characterized in that, The transmission component is a connecting rod, which passes through the extension arm, and the first end of the connecting rod is hinged to the second guide rod.

6. The forklift as described in claim 5, characterized in that, The load-bearing wheel assembly includes a wheel frame axle, a wheel frame, and load-bearing wheels; The wheel frame shaft is hinged to the second end of the connecting rod, the wheel frame is pivotally mounted in the mounting groove, and the load wheel is rotatably mounted on the wheel frame; The first end of the connecting rod moves with the rotation of the rotating shaft, and the second end of the connecting rod drives the wheel frame shaft of the load wheel assembly to move, so that the wheel frame rotates around the pivot point in the mounting groove, thereby pivoting the load wheel out or retracting it into the mounting groove.

7. The forklift as described in claim 1, characterized in that, The connecting part is a connecting plate, which is located between the vehicle body and the extension arm; The top of the connecting plate is connected to the output end of the drive source, and the extension arm is installed at the bottom of the connecting plate.

8. The forklift as described in claim 2, characterized in that, The support wheel assembly includes: The base is fixed to the bottom of the extension arm; and The support wheel is rotatably mounted on the base.

9. The forklift as described in claim 1, characterized in that, The drive source is a hydraulic cylinder, and the output end of the hydraulic cylinder is connected to the connection part of the fork arm assembly.

10. The forklift as described in claim 1, characterized in that, The vehicle body has at least one set of drive wheels at its bottom.

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