Pallet fork capable of finely adjusting pitch angle

By designing a fine-tuning system of articulation and cam structure in forklift forks, the problem of the forks being tilted after loading heavy objects and difficulty in installing pitch adjustment devices is solved, and stable lowering of the goods during unloading and effective fine-tuning of the fork angle is achieved.

CN222861102UActive Publication Date: 2025-05-13ZHANYI INTELLIGENT TECH (SUZHOU) CO LTD
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Patent Information

Application Number
CN202421970111.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-14
Publication Date
2025-05-13
Estimated Expiration
2034-08-14

AI Technical Summary

Technical Problem

The forks for the existing forklifts are tilted due to one-sided stress after loading heavy objects, and then the front end of the cargo falls to the ground first during unloading, causing bumps or damage. The forks are compact in structure and difficult to install a huge pitch adjustment device.

Method used

By designing a fork including a hinged structure and a cam structure, the angle adjustment between the fork body and the fork substrate is achieved. The adjustment crankshaft assembly consists of a crankshaft body, a linkage block, a driving ear plate and a driving motor. By driving the crankshaft body, the pitch angle of the fork is achieved.

Benefits of technology

It effectively avoids the phenomenon that the front end lands first when unloading, reduces the risk of cargo damage, and realizes the fork pitch angle fine-tuning function through a compact structural design.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222861102U_ABST
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Abstract

The utility model provides a pallet fork capable of finely adjusting a pitch angle, which comprises an L-shaped pallet fork body comprising horizontal fork teeth and a vertical plate; the pallet fork base plate and the vertical plate are arranged in parallel; the supporting shaft assembly is connected between the pallet fork body and the pallet fork base plate and located at the bottom. The adjusting crankshaft assembly is connected between the pallet fork body and the pallet fork base plate and located on the top, the adjusting crankshaft assembly comprises a crankshaft body, a linkage block, a driving lug plate and a driving motor, one of the driving lug plate and the linkage block is fixedly connected with the pallet fork body, and the other one of the driving lug plate and the linkage block is fixedly connected with the pallet fork base plate; and the linkage block is provided with a long hole for accommodating a shaft neck of the crankshaft body. According to the pallet fork with the pitch angle capable of being finely adjusted, the angle between the pallet fork body and the pallet fork base plate can be adjusted by adjusting the crankshaft assembly after goods are loaded, so that the front end of the pallet fork body is lifted up, and the front end is prevented from falling to the ground first when the goods are put down.
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Description

Technical Field

[0001] The utility model relates to the technical field of loading and unloading, in particular to a cargo fork capable of fine-tuning a pitch angle. Background Art

[0002] A forklift has two forks, which are inserted into the bottom of the pallet (or a cargo box, cargo, etc. with a fork-mounted structure) to lift the pallet and the cargo on it. Since the forks are load-bearing structures, in order to ensure the load-bearing strength of the forks, the forks are basically fixed in structure, and the pitch of the forks cannot be adjusted. Since the cargo loaded with forks is usually heavy and the force is applied to one side of the forks, after the forks lift the cargo, the forks and their bearing structure will be deformed as a whole due to the characteristics of the one-sided force. In other words, the outside of the forks will tilt downward due to the torque, so in the process of unloading the cargo, the front end of the cargo will inevitably fall to the ground first, causing bumps or damage.

[0003] Since the fork needs to be raised and lowered after loading the goods, the fork structure is compact and it is difficult to install a bulky pitch adjustment device.

[0004] In short, it is difficult to achieve fine pitch adjustment for the forks of existing forklifts. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a fork capable of fine-tuning the pitch angle, which can achieve fine-tuning of the pitch angle of the fork through a hinge structure and a cam structure, thereby solving the problem of the fork tilting due to bearing heavy objects.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] A fork capable of fine-tuning a pitch angle, comprising:

[0008] The fork body (100) is L-shaped and includes horizontal fork teeth (110) and a vertical stand (120);

[0009] A fork base plate (400) is arranged parallel to the vertical stand plate (120);

[0010] A support shaft assembly (200) connected between the fork body (100) and the fork base plate (400) and located at the bottom;

[0011] The adjusting crankshaft assembly (300) is connected between the fork body (100) and the fork base plate (400) and is located at the top. The adjusting crankshaft assembly (300) comprises a crankshaft body (310), a linkage block (320), a driving ear plate (330) and a driving motor (340). One of the driving ear plate (330) and the linkage block (320) is fixedly connected to the fork body (100), and the other is fixedly connected to the fork base plate (400). The linkage block (320) has an elongated hole (321) for accommodating a journal (311) of the crankshaft body (310). The two shaft ends (312) of the crankshaft body (310) are respectively rotatably connected to one driving ear plate (330).

[0012] A fork capable of fine-tuning a pitch angle, comprising:

[0013] The fork body (100) is L-shaped and includes horizontal fork teeth (110) and a vertical stand (120);

[0014] A fork base plate (400) is arranged parallel to the vertical stand plate (120);

[0015] A support shaft assembly (200) connected between the fork body (100) and the fork base plate (400) and located at the top;

[0016] The adjusting crankshaft assembly (300) is connected between the fork body (100) and the fork base plate (400) and is located at the bottom. The adjusting crankshaft assembly (300) comprises a crankshaft body (310), a linkage block (320), a driving ear plate (330) and a driving motor (340). One of the driving ear plate (330) and the linkage block (320) is fixedly connected to the fork body (100), and the other is fixedly connected to the fork base plate (400). The linkage block (320) has an elongated hole (321) for accommodating a journal (311) of the crankshaft body (310). The two shaft ends (312) of the crankshaft body (310) are respectively rotatably connected to one driving ear plate (330).

[0017] A drive hole (313) is provided at one shaft end (312) of the crankshaft body (310), and the drive motor (340) is directly or indirectly connected to the drive hole (313) to drive the crankshaft body (310).

[0018] The driving motor (340) drives the crankshaft body (310) via a reducer.

[0019] The reducer is a planetary reducer or a bevel gear reducer.

[0020] The crankshaft body (310) further comprises a truncated cone structure (314) and an auxiliary positioning platform (315), wherein the truncated cone structure (314) is coaxially arranged with the journal (311), and the diameter of the truncated cone structure (314) is larger than the diameter of the journal (311), and the truncated cone structure (314) is located between the journal (311) and a shaft end (312) with a driving hole (313); the auxiliary positioning platform (315) is located between the journal (311) and the other shaft end (312); the diameter of the auxiliary positioning platform (315) is larger than the diameter of the shaft end (312) but smaller than the diameter of the journal (311).

[0021] The length direction of the elongated hole (321) is the vertical direction.

[0022] One or more ball bearings are also arranged between the journal (311) and the elongated hole (321).

[0023] A limiting structure is installed on the auxiliary positioning platform (315) to limit the ball bearing.

[0024] The upper end of the fork base plate (400) is provided with a limiting guide wheel (420), and the lower end is provided with a track groove (430) and a track groove driving gear (440) for transmission with the track and the rack on the track.

[0025] Compared with the prior art, the advantages of the utility model are as follows:

[0026] The fork capable of fine-adjusting the pitch angle provided by the utility model can adjust the angle between the fork body and the fork base plate by adjusting the crankshaft assembly after loading the goods, so that the front end of the fork body is lifted to avoid the front end falling to the ground first when the goods are lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of a fork capable of fine-tuning the pitch angle in an embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the crankshaft body in the embodiment of the utility model;

[0029] Figure 3 It is a schematic diagram of the exploded structure of the fork capable of fine-tuning the pitch angle in the embodiment of the utility model;

[0030] Figure 4 It is a schematic diagram of the exploded structure of adjusting the crankshaft assembly in the embodiment of the utility model.

[0031] In the figure:

[0032] 100-fork body; 110-fork tines; 120-vertical plate;

[0033] 200-support shaft assembly;

[0034] 300-adjusting crankshaft assembly; 310 crankshaft body; 320 linkage block; 330 driving lug plate; 340 driving motor; 311 journal; 312 shaft end; 313 driving hole; 314 truncated table structure; 315 auxiliary positioning table; 321 elongated hole;

[0035] 400 - fork base plate; 410 image device; 420 limiting guide wheel; 430 track groove; 440 track groove driving gear. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Example

[0038] like Figure 1-4 As shown, the utility model provides a fork capable of fine-tuning the pitch angle, comprising:

[0039] The fork body 100 is L-shaped and includes horizontal fork teeth 110 and a vertical stand 120. The fork body 100 is used to be inserted into a pallet and lift the pallet and the goods thereon through the horizontal fork teeth 110.

[0040] The fork base plate 400 is arranged in parallel with the vertical stand plate 120. The fork base plate 400 is a structure for transmitting power in the middle. The rear end of the fork base plate 400 is usually fixedly connected to the lifting drive mechanism, or can also be connected to the horizontal sliding mechanism;

[0041] The support shaft assembly 200 is connected between the fork body 100 and the fork base plate 400 and is located at the bottom. The support shaft assembly 200 is located at the bottom and is used to provide a force support point. It is connected in the form of a rotating shaft so that the fork body 100 can be used as a rotating shaft for rotation support during pitch adjustment.

[0042] The adjusting crankshaft assembly 300 is connected between the fork body 100 and the fork base plate 400 and is located at the top. The adjusting crankshaft assembly 300 includes a crankshaft body 310, a linkage block 320, a driving ear plate 330 and a driving motor 340, wherein one of the driving ear plate 330 and the linkage block 320 is fixedly connected to the fork body 100, and the other is fixedly connected to the fork base plate 400, the linkage block 320 has an elongated hole 321 for accommodating the journal 311 of the crankshaft body 310, and the two shaft ends 312 of the crankshaft body 310 are respectively rotatably connected to one driving ear plate 330; the adjusting crankshaft assembly 300 realizes swing control through the design of the crankshaft structure, so that the linkage block 320 moves relative to the driving ear plate 330 under the drive of the crankshaft body; the driving ear plate 330 is connected to the fork base plate 400, and the driving block 320 is connected to the fork body 100.

[0043] Compared with the prior art, the advantages of the utility model are as follows:

[0044] The fork capable of fine-adjusting the pitch angle provided by the utility model can adjust the angle between the fork body and the fork base plate by adjusting the crankshaft assembly after loading the goods, so that the front end of the fork body is lifted to avoid the front end falling to the ground first when the goods are lowered.

[0045] In an alternative embodiment, the support shaft assembly is located at the bottom and the adjustment crankshaft assembly is located at the top, i.e. Figure 1-4 The upper and lower positions of the illustrated embodiment are reversed.

[0046] A drive hole 313 is provided at one shaft end 312 of the crankshaft body 310, and the drive motor 340 is directly or indirectly connected to the drive hole 313 to drive the crankshaft body 310. By designing the drive hole 313, the structural design of the coupling can be avoided, and the overall size of the adjustable crankshaft assembly 300 can be reduced.

[0047] The driving motor 340 drives the crankshaft body 310 through a reducer.

[0048] The reducer is a planetary reducer or a bevel gear reducer.

[0049] The crankshaft body 310 also includes a truncated cone structure 314 and an auxiliary positioning platform 315, wherein the truncated cone structure 314 is coaxially arranged with the journal 311, and the diameter of the truncated cone structure 314 is larger than the diameter of the journal 311, and the truncated cone structure 314 is located between the journal 311 and the shaft end 312 with the driving hole 313; the auxiliary positioning platform 315 is located between the journal 311 and the other shaft end 312; the diameter of the auxiliary positioning platform 315 is larger than the diameter of the shaft end 312, but smaller than the diameter of the journal 311. An auxiliary limiting structure can be installed on the auxiliary positioning platform 315, for example, a limiting block can be connected by bolts. The positions of both sides of the journal 311 are limited from both sides by the truncated cone structure 314 and the auxiliary positioning platform 315, so as to limit the ball bearing installed on the journal 311.

[0050] The length direction of the long hole 321 is the vertical direction, and the length of the long hole 321 can meet the up and down swing requirement of the journal 311 of the crankshaft body 310 during one rotation. The two ends of the long hole 321 can be semicircular or square to match the ball bearing.

[0051] One or more ball bearings are further arranged between the journal 311 and the elongated hole 321 .

[0052] A limiting structure is installed on the auxiliary positioning platform 315 to limit the ball bearing.

[0053] The upper end of the fork base plate 400 is provided with a limiting guide wheel 420, and the lower end is provided with a track groove 430 and a track groove driving gear 440 to transmit power to the track and the rack on the track.

[0054] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A fork capable of fine-tuning the pitch angle, characterized in that: include: The fork body (100) is L-shaped and includes horizontal fork teeth (110) and a vertical stand (120); A fork base plate (400) is arranged parallel to the vertical stand plate (120); A support shaft assembly (200) connected between the fork body (100) and the fork base plate (400) and located at the bottom; The adjusting crankshaft assembly (300) is connected between the fork body (100) and the fork base plate (400) and is located at the top. The adjusting crankshaft assembly (300) comprises a crankshaft body (310), a linkage block (320), a driving ear plate (330) and a driving motor (340). One of the driving ear plate (330) and the linkage block (320) is fixedly connected to the fork body (100), and the other is fixedly connected to the fork base plate (400). The linkage block (320) has an elongated hole (321) for accommodating a journal (311) of the crankshaft body (310). The two shaft ends (312) of the crankshaft body (310) are respectively rotatably connected to one driving ear plate (330).

2. A fork capable of fine-tuning the pitch angle, characterized in that: include: The fork body (100) is L-shaped and includes horizontal fork teeth (110) and a vertical stand (120); A fork base plate (400) is arranged parallel to the vertical stand plate (120); A support shaft assembly (200) connected between the fork body (100) and the fork base plate (400) and located at the top; The adjusting crankshaft assembly (300) is connected between the fork body (100) and the fork base plate (400) and is located at the bottom. The adjusting crankshaft assembly (300) comprises a crankshaft body (310), a linkage block (320), a driving ear plate (330) and a driving motor (340). One of the driving ear plate (330) and the linkage block (320) is fixedly connected to the fork body (100), and the other is fixedly connected to the fork base plate (400). The linkage block (320) has an elongated hole (321) for accommodating a journal (311) of the crankshaft body (310). The two shaft ends (312) of the crankshaft body (310) are respectively rotatably connected to one driving ear plate (330).

3. The fork according to claim 1 or 2, characterized in that: A drive hole (313) is provided at one shaft end (312) of the crankshaft body (310), and the drive motor (340) is directly or indirectly connected to the drive hole (313) to drive the crankshaft body (310).

4. The fork according to claim 3, characterized in that: The driving motor (340) drives the crankshaft body (310) via a reducer.

5. The fork according to claim 4, characterized in that: The reducer is a planetary reducer or a bevel gear reducer.

6. The fork according to claim 1 or 2, characterized in that: The crankshaft body (310) further comprises a truncated cone structure (314) and an auxiliary positioning platform (315), wherein the truncated cone structure (314) is coaxially arranged with the journal (311), and the diameter of the truncated cone structure (314) is larger than the diameter of the journal (311), and the truncated cone structure (314) is located between the journal (311) and a shaft end (312) with a driving hole (313); the auxiliary positioning platform (315) is located between the journal (311) and the other shaft end (312); the diameter of the auxiliary positioning platform (315) is larger than the diameter of the shaft end (312) but smaller than the diameter of the journal (311).

7. The fork according to claim 6, characterized in that: The length direction of the elongated hole (321) is the vertical direction.

8. The fork according to claim 6, characterized in that: One or more ball bearings are also arranged between the journal (311) and the elongated hole (321).

9. The fork according to claim 6, characterized in that: A limiting structure is installed on the auxiliary positioning platform (315) to limit the ball bearing.

10. The fork according to claim 1 or 2, characterized in that: The upper end of the fork base plate (400) is provided with a limiting guide wheel (420), and the lower end is provided with a track groove (430) and a track groove driving gear (440) for transmission with the track and the rack on the track.