Lifting mechanism and pallet truck

Abstract

The embodiment of the utility model provides a lifting mechanism and a tray truck. The lifting mechanism comprises a supporting frame, a lifting mechanism and a lifting mechanism, the fork arm assembly comprises a back plate and a pallet fork arm, the back plate is connected with the supporting frame, and the pallet fork arm is connected with one end of the back plate and extends towards the side, away from the supporting frame, of the back plate; the auxiliary wheel assembly is rotationally installed at the end, away from the supporting frame, of the pallet fork arm, and the auxiliary wheel assembly is used for assisting in supporting the lifting mechanism; and the driving assembly is installed on the supporting frame, the driving assembly is connected with the back plate, and the driving assembly is used for driving the fork arm assembly to ascend in the vertical direction, driving the auxiliary wheel assembly to rotate and be in a contraction state and driving the fork arm assembly to descend in the vertical direction, driving the auxiliary wheel assembly to rotate and be in an extending state. The lifting mechanism and the pallet truck provided by the embodiment of the utility model can be suitable for carrying American pallets, and ascending or descending of the fork arm assembly and contraction or extension of the auxiliary wheel assembly are achieved through the driving assembly.

Description

Technical Field

[0001] This application belongs to the field of pallet truck technology, and particularly relates to a lifting mechanism and a pallet truck. Background Technology

[0002] AGVs (Automated Guided Vehicles) are automated handling vehicles specifically designed for logistics and warehousing scenarios. They are primarily used to efficiently and accurately transport, stack, and sort palletized goods in environments such as warehouses and factories. They achieve autonomous path planning through laser navigation, magnetic stripe navigation, visual navigation, or real-time positioning and mapping technology; they typically carry palletized goods weighing from 500kg to 2000kg; and they support various handling methods such as forklift, tow, or roller conveyor systems, adapting to different pallet types.

[0003] Current pallet trucks are not compatible with pallet sizes used in various industries. For example, existing pallet trucks cannot accommodate American pallets because their structure differs from other pallets. American pallets, in addition to the surface for placing goods, also have horizontal fixing plates on the surface in contact with the ground. The structure of existing pallet trucks can interfere with and collide with the pallets, causing them to shift and making it impossible to complete the transport operation. Utility Model Content

[0004] In view of this, embodiments of this application provide a lifting mechanism and a pallet transport vehicle to solve the technical problem that the structure of existing pallet transport vehicles interferes with and collides with the pallet, causing the pallet to shift.

[0005] In a first aspect, embodiments of this application provide a lifting mechanism, including:

[0006] Support frame;

[0007] A fork arm assembly includes a back plate and a fork arm, the back plate being connected to the support frame, and the fork arm being connected to one end of the back plate and extending toward the side of the back plate away from the support frame;

[0008] An auxiliary wheel assembly is rotatably mounted on the end of the fork arm away from the support frame, and the auxiliary wheel assembly is used to assist in supporting the lifting mechanism;

[0009] A drive assembly is mounted on the support frame and connected to the back plate. The drive assembly is used to drive the fork arm assembly to rise vertically while simultaneously driving the auxiliary wheel assembly to rotate and be in a retracted state, and to drive the fork arm assembly to descend vertically while simultaneously driving the auxiliary wheel assembly to rotate and be in an extended state.

[0010] In some embodiments, the lifting mechanism further includes a linkage assembly that connects the support frame, the back plate, and the auxiliary wheel assembly. While the drive assembly drives the fork arm assembly to rise or fall, it also drives the auxiliary wheel assembly to rotate through the linkage assembly, so that the auxiliary wheel assembly retracts or extends synchronously.

[0011] In some embodiments, the linkage assembly includes:

[0012] A support member is provided on the side of the back plate away from the fork arm;

[0013] One end of the pull rod is hinged to the auxiliary wheel assembly;

[0014] The swing arm is rotatably connected to the support member in the middle, and one end of the swing arm is hinged to the tie rod;

[0015] A guide structure, disposed on the support frame, is used to guide the swing direction of the swing arm and the pull rod; and

[0016] The energy storage component has one end fixed to the back plate and the other end connected to the end of the swing arm away from the pull rod. The energy storage component is used to convert the driving force of the drive assembly driving the back plate and the fork arm to rise or fall into the force that drives the swing arm and the pull rod to swing.

[0017] In some embodiments, the guide structure includes:

[0018] The guide roller is hinged to the pull rod via a rotating shaft;

[0019] A guide slider is provided on the support frame;

[0020] The guide slider is inclined from the end away from the energy storage member to the end near the energy storage member, in a direction close to the back plate.

[0021] In some embodiments, the support member includes two fixed blocks and a support roller, the support roller being rotatably disposed between the two fixed blocks, and the swing arm being rotatably connected to the fixed blocks through the support roller;

[0022] And / or, the energy storage element is a tension spring.

[0023] In some embodiments, the driving component includes:

[0024] One end of the cantilever is fixed to the back plate, and the other end of the cantilever is slidably connected to the support frame;

[0025] A hydraulic rod, one end of which is fixed to the support frame, and the other end of which is connected to the cantilever;

[0026] The hydraulic rod extends and retracts, causing the cantilever and fork arm assemblies to rise and fall.

[0027] In some embodiments, the support frame includes:

[0028] A base plate, which supports the drive assembly;

[0029] A top plate is located above the bottom plate;

[0030] A fixing plate is disposed at one end of the base plate near the fork arm, and the fixing plate connects the top plate and the top plate. The fixing plate has a through hole for the cantilever arm to pass through.

[0031] A slide rail guide post is located at the end of the base plate away from the fixed plate. The two ends of the slide rail guide post are respectively connected to the top plate and the top plate. The slide rail causes a sliding connection with the cantilever.

[0032] In some embodiments, the fork arm is provided with a receiving groove for accommodating the connecting rod assembly and the auxiliary wheel assembly.

[0033] In some embodiments, the fork arm is further provided with a clearance hole for the auxiliary wheel assembly.

[0034] In some embodiments, the fork arm is further provided with a limiting plate, which is used to limit the swing of the auxiliary wheel assembly.

[0035] In some embodiments, the auxiliary wheel assembly includes:

[0036] The mounting block is hingedly connected to the connecting rod assembly;

[0037] At least one directional wheel is rotatably mounted on the mounting block; and

[0038] A fixed shaft is inserted through the mounting block, and the fixed shaft is in contact with the connecting rod assembly.

[0039] Secondly, embodiments of this application provide a pallet transport vehicle, including:

[0040] The lifting mechanism described in the first aspect;

[0041] The vehicle body is equipped with a traveling assembly, which is used to drive the pallet transport vehicle to move.

[0042] The lifting mechanism is mounted on the vehicle body.

[0043] The lifting mechanism and pallet truck provided in this application embodiment, by setting an extendable and retractable auxiliary wheel assembly, can transport pallets of different sizes, especially American pallets. When the fork arm enters the fork hole of the American pallet, the auxiliary wheel is in a retracted state (retracted into the fork arm), and the fork arm is suspended in the pallet fork hole, thereby effectively avoiding interference and collision between the fork arm and the pallet during passage, which would cause the pallet to shift. Moreover, by using the same set of drive components to simultaneously provide driving force to the fork arm assembly to drive the fork arm to rise or fall, it can also simultaneously drive the auxiliary wheel assembly to extend or retract, simplifying the drive components. Only one set of drive components is needed to provide power output to complete the synchronous actions of fork arm lifting, lowering and auxiliary wheel retraction and extension. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application, 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 embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the lifting mechanism provided in the embodiments of this application. Figure 1 ;

[0046] Figure 2 This is a schematic diagram of the lifting mechanism provided in the embodiments of this application. Figure 2 ;

[0047] Figure 3 This is a schematic diagram of the lifting mechanism provided in the embodiments of this application. Figure 3 ;

[0048] Figure 4 This is a schematic diagram of the structure of the pallet truck provided in the embodiments of this application. Figure 1 ;

[0049] Figure 5 This is a schematic diagram of the structure of the pallet truck provided in the embodiments of this application. Figure 2 ;

[0050] Figure 6 This is a schematic diagram of the structure of the pallet truck provided in the embodiments of this application. Figure 3 .

[0051] The attached icon numbers are as follows:

[0052] 10. Support frame; 11. Base plate; 12. Top plate; 13. Fixing plate; 14. Slide rail guide column;

[0053] 20. Fork arm assembly; 21. Back plate; 22. Fork arm; 220. Receiving groove; 221. Assist hole; 222. Limiting plate;

[0054] 30. Auxiliary wheel assembly; 31. Mounting block; 32. Directional wheel; 33. Fixed shaft;

[0055] 40. Drive assembly; 41. Cantilever; 42. Hydraulic rod;

[0056] 50. Linkage assembly; 51. Support component; 511. Fixing block; 512. Support roller; 52. Tie rod; 53. Swing arm; 54. Guide structure; 541. Guide roller; 542. Guide slider; 55. Power storage component;

[0057] 60. Vehicle body; 61. Running gear; 611. Wheel. Detailed Implementation

[0058] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that the embodiments of this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the embodiments of this application with unnecessary detail.

[0059] It should also be understood that the term "and / or" as used in the specification of embodiments of this application and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0060] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0061] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0062] Furthermore, in the description of the embodiments and the appended claims of this application, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0063] In the description of embodiments in this application, references to "some embodiments" or "some embodiments" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in some embodiments," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiments, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. "A plurality" refers to two or more.

[0064] The first aspect of this application provides a lifting mechanism, such as... Figures 1 to 3 As shown, the lifting mechanism includes a support frame 10, a fork arm assembly 20, an auxiliary wheel assembly 30, and a drive assembly 40;

[0065] The fork arm assembly 20 includes a back plate 21 and a fork arm 22. The back plate 21 is connected to the support frame 10, and the fork arm 22 is connected to one end of the back plate 21 and extends toward the side of the back plate 21 away from the support frame 10.

[0066] The auxiliary wheel assembly 30 is rotatably mounted on the end of the fork arm 22 away from the support frame 10. The auxiliary wheel assembly 30 is used to assist in supporting the lifting mechanism.

[0067] The drive assembly 40 is mounted on the support frame 10 and is connected to the back plate 21. The drive assembly 40 is used to drive the fork arm assembly 20 to rise vertically while driving the auxiliary wheel assembly 30 to rotate and be in a retracted state. The drive assembly 40 is also used to drive the fork arm assembly 20 to descend vertically while driving the auxiliary wheel assembly 30 to rotate and be in an extended state.

[0068] The lifting mechanism provided in this application embodiment, by providing an extendable and retractable auxiliary wheel assembly 30, can transport pallets of different sizes, especially American pallets. When the fork arm 22 enters the fork hole of the American pallet, the auxiliary wheel is in a retracted state (retracted into the fork arm 22), and the fork arm 22 is suspended in the pallet fork hole, thereby effectively avoiding interference and collision between the fork arm 22 and the pallet during passage, which would cause the pallet to shift. Specifically, when transporting American pallets, when the fork arm 22 enters the fork hole of the American pallet, the drive assembly 40 drives the fork arm 22 to rise, causing the auxiliary wheel assembly 30, which is rotatably connected to the fork arm 22, to rotate and retract into the fork arm 22. Furthermore, the entire fork arm 22 is suspended in the air, preventing interference between the auxiliary wheel assembly 30 and the structure of the American pallet, thus enabling the handling of American pallets and improving its applicability.

[0069] Furthermore, the lifting mechanism provided in this application embodiment provides driving force to the fork arm assembly 20 simultaneously through the same set of drive components 40 to drive the fork arm 22 to rise or fall, and can also simultaneously drive the auxiliary wheel assembly 30 to extend or retract. Only one set of drive components 40 is needed to provide power output to complete the synchronous actions of lifting and lowering the fork arm and retracting and extending the auxiliary wheel, which effectively simplifies the drive components 40 of the lifting mechanism and makes the entire lifting mechanism lighter.

[0070] In this application, two fork arms 22 are provided, parallel to each other and spaced apart at one end of the back plate 21. This arrangement of the two fork arms 22 facilitates the formation of a stable support platform to stably support and lift the pallet. Each fork arm 22 includes a connecting end and a bearing end. The connecting end of the fork arm 22 is connected to one end of the back plate 21, and the bearing end extends towards the side of the back plate 21 away from the support frame 10. This allows the bearing end to be inserted into the pallet's fork holes as much as possible, avoiding interference between the back plate 21 and the pallet's structure.

[0071] It should be noted that the vertical direction refers to the direction in which the lifting mechanism goes up or down, which is the Y direction in the figure, and the horizontal direction refers to the length direction of the fork arm 22, which is the X direction in the figure.

[0072] In application, the auxiliary wheel assembly 30 being in the retracted state means that the auxiliary wheel assembly 30 is located inside the fork arm 22 or overlaps with the fork arm 22 in the vertical direction, so as to avoid the auxiliary wheel assembly 30 interfering with the pallet in the vertical direction, affecting the lifting and transportation of the pallet; the extended state means that the auxiliary wheel assembly 30 is located below the fork arm 22, and the auxiliary wheel assembly 30 is in contact with the ground or support surface, and together with the vehicle body 60, it supports the fork arm 22.

[0073] In some embodiments, such as Figures 1 to 3 As shown, the lifting mechanism also includes a linkage assembly 50, which connects the support frame 10, the back plate 21, and the auxiliary wheel assembly 30. While driving the fork arm assembly 20 to rise or fall, the drive assembly 40 drives the auxiliary wheel assembly 30 to rotate via the linkage assembly 50, causing the auxiliary wheel assembly 30 to retract or extend synchronously. Specifically, when the drive assembly 40 drives the fork arm assembly 20 to rise, the linkage assembly 50 drives the auxiliary wheel assembly 30 to retract into the fork arm 22; when the drive assembly 40 drives the fork arm assembly 20 to fall, the linkage assembly 50 drives the auxiliary wheel assembly 30 to extend and provide auxiliary support to the fork arm 22.

[0074] In some embodiments, such as Figures 1 to 3 As shown, the linkage assembly 50 includes a support member 51, a tie rod 52, a swing arm 53, a guide structure 54, and a power storage member 55;

[0075] The support member 51 is located on the side of the back plate 21 away from the fork arm 22;

[0076] One end of the pull rod 52 is hinged to the auxiliary wheel assembly 30, and the other end of the pull rod 52 is hinged to one end of the swing arm 53;

[0077] The middle part of the swing arm 53 is rotatably connected to the support member 51, and the end of the swing arm 53 away from the tie rod 52 is connected to the energy storage member 55.

[0078] The guide structure 54 is mounted on the support frame 10 and is used to guide the swing direction of the swing arm 53 and the tie rod 52.

[0079] One end of the accumulator 55 is fixed to the back plate 21, and the other end of the accumulator 55 is connected to the end of the swing arm 53 away from the pull rod 52. The accumulator 55 is used to convert the driving force of the drive assembly 40 driving the back plate 21 and the fork arm 22 to rise or fall into the force that drives the swing arm 53 and the pull rod 52 to swing. Through the linkage assembly 50, part of the power of the drive assembly 40 driving the fork arm 22 to rise or fall is converted into the power to drive the auxiliary wheel assembly 30 to rotate, so that when the fork arm 22 rises, the auxiliary wheel assembly 30 retracts synchronously, and when the fork arm 22 falls, the auxiliary wheel assembly 30 extends synchronously. It is very convenient and quick to use and can effectively improve the efficiency of pallet handling.

[0080] In some embodiments, such as Figure 1 and Figure 2 As shown, the guide structure 54 includes a guide roller 541 and a guide slider 542;

[0081] The guide roller 541 is hinged to the pull rod 52 via a rotating shaft, and the guide slider 542 is mounted on the support frame 10.

[0082] The guide slider 542 is inclined towards the back plate 21 from the end furthest from the energy storage member 55 to the end closest to the energy storage member 55. This ensures that the swing arm 53 moves obliquely upward in the direction of the guide slider 542, thereby causing the pull rod 52 to push the auxiliary wheel assembly 30 to rotate in the horizontal direction, thus achieving retraction and extension.

[0083] In some embodiments, such as Figure 2 As shown, the support member 51 includes two fixed blocks 511 and a support roller 512. The support roller 512 is rotatably disposed between the two fixed blocks 511, and the swing arm 53 is rotatably connected to the fixed blocks 511 through the support roller 512. This arrangement helps improve the connection stability between the swing arm 53 and the support roller 512, and also enables the rotatable connection between the swing arm 53 and the support roller 512. In application, the support roller is rotatably connected to the back plate 21, so that when the back plate 21 and the fork arm 22 are driven to rise or fall, sliding friction can be converted into rolling friction, which helps to make the fork arm 22 rise or fall smoothly.

[0084] In application, the energy storage component 55 is a tension spring. The tension spring first stores the force that causes the fork arm 22 to deform when it rises, and then releases the potential energy when it descends to pull the swing arm 53 and the pull rod 52 back to their original positions, thereby enabling the extension of the auxiliary wheel assembly 30.

[0085] In application, a support roller 512 is installed at the connection between the back plate 21 and the support frame 10. The support roller 512 is used to support the fork arm 22, and the distance and angle of the fork arm 22 supported by this support point are used to fine-tune the height of the front end of the fork arm 22 relative to the ground. One end of the swing arm 53 is fixed to the support roller 512, and a guide roller 541 is installed on the side of the swing arm 53. The other end of the swing arm 53 is then connected to the tie rod 52, and the other end of the tie rod 52 is connected to the auxiliary wheel assembly 30. One end of the tension spring is fixed to the swing arm 53, and the other end of the tension spring is fixed to the back plate 21.

[0086] In applications, such as Figures 4 to 6 As shown, the specific working principle of the linkage assembly 50 is as follows:

[0087] When the fork arm 22 descends to the set minimum height, the swing arm 53 is affected by the tension of the tension spring. The swing arm 53 moves in the opposite direction to the connection between the swing arm 53 and the pull rod 52 around the rotation center of the fixed block 511. The auxiliary wheel assembly 30 is pulled and retracted into the fork arm 22 via the pull rod 52. At this time, the fork arm 22 can smoothly enter the pallet fork hole.

[0088] When the drive assembly 40 pushes the fork arm assembly 20 to move up or down, the support roller 512 supports the fork arm 22 and rolls on the back plate 21, so that the fork arm 22 moves up and down smoothly in parallel.

[0089] When the fork arm 22 moves up and down, the guide roller 541 rolls on the inclined surface of the guide slider 542. Under the influence of the inclined surface of the guide slider 542, the swing arm 53 pushes the pull rod 52 when it moves up. At this time, the tension spring is stretched. When it moves down, the tension spring pulls the pull rod 52, which in turn enables the auxiliary wheel assembly 30 to perform continuous ground support actions (retraction or extension) in coordination with the fork arm 22 when it moves up or down.

[0090] In some embodiments, such as Figure 1 As shown, the drive assembly 40 includes a cantilever 41 and a hydraulic rod 42;

[0091] One end of the cantilever 41 is fixed to the back plate 21, and the other end of the cantilever 41 is slidably connected to the support frame 10.

[0092] One end of the hydraulic rod 42 is fixed to the support frame 10, and the other end of the hydraulic rod 42 is connected to the cantilever 41.

[0093] The cantilever 41 and fork arm assembly 20 are raised and lowered by the extension and retraction of the hydraulic rod 42. Using the hydraulic rod 42 (i.e., a hydraulic cylinder) to drive the fork arm 22 to rise or fall has the following advantages: Firstly, it has a high load capacity. Based on Pascal's law, by transmitting pressure through incompressible fluid, the hydraulic system can generate a large output force with a small input force. Secondly, the movement is smooth and precise. The continuity and adjustability of the fluid flow allow the hydraulic system to achieve stepless speed regulation, smooth start and stop, and reduced impact vibration. Thirdly, the hydraulic cylinder is small in size and has high power density, providing large thrust within a limited space and simplifying the mechanical structure.

[0094] In some embodiments, such as Figure 1 As shown, the support frame 10 includes a base plate 11, a top plate 12, a fixing plate 13, and a slide rail guide column 14;

[0095] The base plate 11 is used to support the drive assembly 40, and the top plate 12 is located above the base plate 11;

[0096] The fixing plate 13 is located at one end of the bottom plate 11 near the fork arm 22, and the fixing plate 13 connects the top plate 12 and the top plate 12. The fixing plate 13 has through holes for the cantilever 41 to pass through.

[0097] The slide rail guide post 14 is located at the end of the base plate 11 away from the fixed plate 13. The two ends of the slide rail guide post 14 are connected to the top plate 12 and the top plate 12 respectively, and the slide rail causes a sliding connection with the cantilever 41. In this way, the support frame 10 is reasonably laid out, with a compact and stable structure, which can provide stable support for the drive assembly 40 and the fork arm assembly 20.

[0098] In some embodiments, such as Figure 5As shown, a receiving groove 220 is provided on the fork arm 22, which is used to receive the connecting rod assembly 50 and the auxiliary wheel assembly 30.

[0099] In some embodiments, such as Figure 5 As shown, a clearance hole 221 is also provided on the fork arm 22, which is used to make way for the auxiliary wheel assembly 30.

[0100] In some embodiments, such as Figure 5 As shown, the fork arm 22 is also provided with a limiting plate 222, which is used to limit the swing of the auxiliary wheel assembly 30. Under the positioning of the auxiliary wheel anti-sway fixing plate, the auxiliary wheel assembly 30 is prevented from swinging out of the limit and not being horizontal, which is conducive to the fork arm 22 entering the fork hole of the pallet for handling.

[0101] In some embodiments, such as Figure 3 As shown, the auxiliary wheel assembly 30 includes a mounting block 31, a directional wheel 32, and a fixed shaft 33;

[0102] Mounting block 31 is hinged to connecting rod assembly 50;

[0103] At least one directional wheel 32 is rolled on the mounting block 31;

[0104] The fixed shaft 33 passes through the mounting block 31 and is abutted against the connecting rod assembly 50. Thus, a pulling force or a pushing force can be applied to the fixed shaft 33 by the pull rod 52 to cause the auxiliary wheel assembly 30 to rotate, thereby retracting into or extending out of the fork arm 22.

[0105] In a specific embodiment, two directional wheels 32 are provided, which can be arranged sequentially or side by side to further enhance the supporting function.

[0106] This application also provides a pallet transporter, such as... Figures 4 to 6 As shown, the pallet truck includes the lifting mechanism and vehicle body 60 described in the first aspect;

[0107] The vehicle body 60 is equipped with a traveling component 61, which is used to drive the pallet truck to move.

[0108] The lifting mechanism is mounted on the vehicle body 60.

[0109] The pallet truck provided in this application embodiment has the lifting mechanism described in the first aspect, and therefore naturally possesses all the beneficial effects described in the first aspect. In addition, the pallet truck provided in this application can be applied to pallets of different sizes, and in particular can be specifically used for handling American pallets, which greatly improves the applicability of the pallet truck.

[0110] In the application, the travel assembly 61 includes a motor (not shown) and wheels 611, which are evenly distributed on the vehicle body 60. The motor drives the wheels 611 to move, thereby moving the vehicle body 60. In other embodiments, the travel assembly 61 may include drive wheels with their own drive motors.

[0111] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0112] The above-described embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of the embodiments of this application.

Claims

1. A lifting mechanism, characterized in that, include: Support frame; A fork arm assembly includes a back plate and a fork arm, the back plate being connected to the support frame, and the fork arm being connected to one end of the back plate and extending toward the side of the back plate away from the support frame; An auxiliary wheel assembly is rotatably mounted on the end of the fork arm away from the support frame, and the auxiliary wheel assembly is used to assist in supporting the lifting mechanism; A drive assembly is mounted on the support frame and connected to the back plate. The drive assembly is used to drive the fork arm assembly to rise vertically while simultaneously driving the auxiliary wheel assembly to rotate and be in a retracted state, and to drive the fork arm assembly to descend vertically while simultaneously driving the auxiliary wheel assembly to rotate and be in an extended state.

2. The lifting mechanism as described in claim 1, characterized in that, The lifting mechanism also includes a linkage assembly, which connects the support frame, the back plate, and the auxiliary wheel assembly. While the drive assembly drives the fork arm assembly to rise or fall, it also drives the auxiliary wheel assembly to rotate through the linkage assembly, so that the auxiliary wheel assembly retracts or extends synchronously.

3. The lifting mechanism as described in claim 2, characterized in that, The linkage assembly includes: A support member is provided on the side of the back plate away from the fork arm; One end of the pull rod is hinged to the auxiliary wheel assembly; The swing arm is rotatably connected to the support member in the middle, and one end of the swing arm is hinged to the pull rod; A guide structure, disposed on the support frame, is used to guide the swing direction of the swing arm and the pull rod; and The energy storage component has one end fixed to the back plate and the other end connected to the end of the swing arm away from the pull rod. The energy storage component is used to convert the driving force of the drive assembly driving the back plate and the fork arm to rise or fall into the force that drives the swing arm and the pull rod to swing.

4. The lifting mechanism as described in claim 3, characterized in that, The guiding structure includes: The guide roller is hinged to the pull rod via a rotating shaft; A guide slider is provided on the support frame; The guide slider is inclined from the end away from the energy storage member to the end near the energy storage member, in a direction close to the back plate.

5. The lifting mechanism as described in claim 3, characterized in that, The support member includes two fixed blocks and a support roller. The support roller is rotatably disposed between the two fixed blocks, and the swing arm is rotatably connected to the fixed blocks through the support roller. And / or, the energy storage element is a tension spring.

6. The lifting mechanism as described in claim 1, characterized in that, The driving component includes: One end of the cantilever is fixed to the back plate, and the other end of the cantilever is slidably connected to the support frame; A hydraulic rod, one end of which is fixed to the support frame, and the other end of which is connected to the cantilever; The hydraulic rod extends and retracts, causing the cantilever and fork arm assemblies to rise and fall.

7. The lifting mechanism as described in claim 6, characterized in that, The support frame includes: A base plate, which supports the drive assembly; A top plate is disposed above the bottom plate; A fixing plate is disposed at one end of the base plate near the fork arm, and the fixing plate connects the top plate and the top plate. The fixing plate has a through hole for the cantilever arm to pass through. A slide rail guide post is located at the end of the base plate away from the fixed plate. The two ends of the slide rail guide post are respectively connected to the top plate and the top plate. The slide rail causes a sliding connection with the cantilever.

8. The lifting mechanism as described in claim 1, characterized in that, The fork arm is provided with a receiving groove for accommodating the auxiliary wheel assembly; And / or, the fork arm is also provided with a clearance hole, which is used to make way for the auxiliary wheel assembly; And / or, the fork arm is further provided with a limiting plate, which is used to limit the swing of the auxiliary wheel assembly.

9. The lifting mechanism as described in any one of claims 2 to 5, characterized in that, The auxiliary wheel assembly includes: The mounting block is hingedly connected to the connecting rod assembly; At least one directional wheel is rotatably mounted on the mounting block; and A fixed shaft is inserted through the mounting block, and the fixed shaft is in contact with the connecting rod assembly.

10. A pallet transporter, characterized in that, include: The lifting mechanism according to any one of claims 1 to 9; The vehicle body is equipped with a traveling assembly, which is used to drive the pallet transport vehicle to move. The lifting mechanism is mounted on the vehicle body.

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