Adjusting mechanism for pitching angle of pallet fork

Abstract

The utility model discloses an adjusting mechanism for the pitching angle of a pallet fork, which comprises a portal frame, a first connecting part and a second connecting part, a third connecting part and a fourth connecting part are arranged on the pallet fork, and the third connecting part is rotatably connected with the first connecting part; the driving oil cylinder comprises a cylinder body and a piston rod, the cylinder body is rotatably connected with the second connecting part, and the piston rod is rotatably connected with the fourth connecting part. In the utility model, as the cylinder body can rotate relative to the door frame by taking the second connecting part as the shaft, and the piston rod can rotate relative to the pallet fork by taking the fourth connecting part as the shaft, the oil cylinder can also rotate synchronously in the process of adjusting the angle of the pallet fork, so that the suffocation between the cylinder body and the door frame, between the cylinder body and the piston rod and between the piston rod and the pallet fork is avoided; and the service life of the driving oil cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to an adjustment mechanism for the pitch angle of a cargo fork. Background Art

[0002] The fork is a component installed on a forklift for lifting goods. When loading and unloading goods, the fork needs to be tilted forward to facilitate the fork to enter or exit the shelf. When driving, the fork needs to be tilted backward to enhance the stability of the fork and the goods during driving and prevent the goods from falling off the fork. Based on this, it is necessary to design a set of fork pitch angle adjustment mechanisms. The current pitch angle adjustment mechanism drives the fork to rotate relative to the mast by driving the extension and contraction of the oil cylinder, thereby achieving the adjustment of the fork pitch angle.

[0003] When the driving cylinder drives the fork to adjust the angle, the cylinder itself also rotates at a small angle. However, since the fork angle adjustment range is very small, the rotation angle required by the driving cylinder is also small. Therefore, in the existing pitch angle adjustment mechanism, the driving cylinder is fixed to the mast, and the cylinder remains fixed and does not rotate with the rotation of the fork. It can be seen that although the rotation angle required by the driving cylinder is very small, after it is fixed, most of the time it can absorb the force of the fork on the cylinder through its own elasticity when the fork rotates. However, as the fork adjustment angle increases and the use time prolongs, when the cylinder's own elasticity is not enough to absorb the force of the fork rotation on the cylinder, the cylinder is prone to a series of damage phenomena such as bending, breaking and breakage. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose an adjustment mechanism for the pitch angle of a fork, so as to solve the problem that the driving cylinder cannot rotate with the fork and is damaged in the prior art.

[0005] The technical solution adopted by the utility model to solve the technical problem is a mechanism for adjusting the pitch angle of a fork, comprising:

[0006] A gantry, wherein the gantry is provided with a first connection portion and a second connection portion; the fork is provided with a third connection portion and a fourth connection portion, and the third connection portion is rotatably connected to the first connection portion;

[0007] The driving oil cylinder comprises a cylinder body and a piston rod, wherein the cylinder body is rotatably connected to the second connecting part, and the piston rod is rotatably connected to the fourth connecting part.

[0008] Furthermore, a connecting frame is provided on the second connecting portion, the connecting frame comprising a connecting plate for connecting with the door frame, and side plates provided on both sides of the connecting plate, the side plates being provided with a first connecting hole;

[0009] A connecting column is respectively provided on both sides of the cylinder body, and the connecting column can be rotatably arranged in the first connecting hole.

[0010] Furthermore, a gasket is provided in the first connecting hole, and the gasket is sleeved on the connecting column.

[0011] Furthermore, a connecting block is respectively provided on both sides of the cylinder body, and the connecting column is threadedly connected to the connecting block.

[0012] Furthermore, the connecting plate is connected to the portal frame by bolts.

[0013] Furthermore, the fork is provided with two mounting blocks, and the mounting blocks are provided with second connecting holes;

[0014] A through hole is opened on the piston rod along its radial direction, a connecting rod is arranged in the through hole, and two ends of the connecting rod extend out of the through hole and extend into the second connecting hole respectively to be rotatably connected with the mounting block.

[0015] Furthermore, the first connecting portion is located at an upper end of the door frame, and the second connecting portion is located at a lower end of the door frame.

[0016] Furthermore, the third connection portion is located at an upper end of the fork, and the fourth connection portion is located at a lower end of the fork.

[0017] Compared with the prior art, the utility model has at least the following beneficial effects:

[0018] The cylinder body of the driving oil cylinder is hinged to the second connection part on the gantry, and the piston rod on the driving oil cylinder is hinged to the fourth connection part on the fork. When the driving oil cylinder is extended and retracted, it can drive the fork to rotate relative to the gantry with the third connection part as the axis, thereby adjusting the pitch angle of the fork. At the same time, since the cylinder body can rotate relative to the gantry with the second connection part as the axis, and the piston rod can rotate relative to the fork with the fourth connection part as the axis, the cylinder also rotates synchronously during the process of adjusting the angle of the fork, thereby avoiding the cylinder body and the gantry, the cylinder body and the piston rod, and the piston rod and the fork from being stuck, thereby extending the service life of the driving oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the adjustment mechanism in the embodiment;

[0020] Figure 2 This is a schematic diagram of the structure of the adjustment mechanism after the door frame is removed in the embodiment;

[0021] Figure 3 It is a schematic diagram of the structure of the driving cylinder and the connecting frame in the embodiment;

[0022] Figure 4It is a structural schematic diagram of the connecting frame in the embodiment;

[0023] In the figure:

[0024] 100. Door frame;

[0025] 200, fork; 210, mounting block;

[0026] 300, driving cylinder; 310, cylinder body; 311, connecting block; 312, connecting column; 320, piston rod; 321, connecting rod;

[0027] 400, connecting frame; 410, connecting plate; 420, side plate; 421, first connecting hole; 422, gasket. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] Please refer to Figure 1-Figure 4 The utility model discloses a mechanism for adjusting the pitch angle of a fork, comprising:

[0030] A mast 100, wherein the mast 100 is provided with a first connection portion and a second connection portion; the fork 200 is provided with a third connection portion and a fourth connection portion, wherein the third connection portion is rotatably connected to the first connection portion;

[0031] The driving cylinder 300 includes a cylinder body 310 and a piston rod 320 . The cylinder body 310 is rotatably connected to the second connection portion, and the piston rod 320 is rotatably connected to the fourth connection portion.

[0032] Specifically, the present application hinges the cylinder body 310 of the driving cylinder 300 with the second connection part on the gantry 100, and hinges the piston rod 320 on the driving cylinder 300 with the fourth connection part on the fork 200. When the driving cylinder 300 is extended or retracted, it can drive the fork 200 to rotate relative to the gantry 100 with the third connection part as the axis, thereby adjusting the pitch angle of the fork 200. At the same time, since the cylinder body 310 can rotate relative to the gantry 100 with the second connection part as the axis, and the piston rod 320 can rotate relative to the fork 200 with the fourth connection part as the axis, the cylinder also rotates synchronously during the process of adjusting the angle of the fork 200, thereby avoiding the cylinder body 310 and the gantry 100, the cylinder body 310 and the piston rod 320, and the piston rod 320 and the fork 200 from being stuck, thereby extending the service life of the driving cylinder 300.

[0033] Furthermore, a connecting frame 400 is further provided on the second connecting portion, and the connecting frame 400 includes a connecting plate 410 for connecting with the door frame 100, and side plates 420 provided on both sides of the connecting plate 410, and a first connecting hole 421 is opened on the side plate 420;

[0034] A connecting column 312 is respectively disposed on both sides of the cylinder body 310 , and the connecting column 312 is rotatably disposed in the first connecting hole 421 .

[0035] Specifically, a connecting frame 400 is provided, which includes a connecting plate 410 and two side plates 420. A first connecting hole 421 is opened on the side plate 420, so that the connecting columns 312 on both sides of the cylinder body 310 extend into the first connecting hole 421, thereby realizing a rotatable connection between the cylinder body 310 and the door frame 100.

[0036] Furthermore, a gasket 422 is disposed in the first connection hole 421 , and the gasket 422 is sleeved on the connection column 312 .

[0037] Specifically, the gasket 422 is provided to prevent the connection column 312 from directly contacting the inner wall of the first connection hole 421 , thereby protecting the connection column 312 and the first connection hole 421 .

[0038] It should be noted that since the rotation angle required to drive the oil cylinder 300 is very small, there is no need to set a bearing between the first connecting hole 421 and the connecting column 312. Only a washer 422 is needed to protect the connecting column 312 and the first connecting hole 421, which can also reduce costs.

[0039] Furthermore, a connecting block 311 is respectively disposed on both sides of the cylinder body 310 , and the connecting column 312 is threadedly connected to the connecting block 311 .

[0040] A connecting block 311 is provided, a threaded hole is opened on the connecting block 311, and a thread is provided on the connecting column 312. The connecting column 312 is screwed into the threaded hole to realize the rotatable connection between the cylinder body 310 and the connecting frame 400.

[0041] Furthermore, the connecting plate 410 is bolted to the door frame 100 .

[0042] The connecting plate 410 is bolted to the door frame 100 to facilitate assembly and maintenance.

[0043] Furthermore, the fork 200 is provided with two mounting blocks 210, and the mounting blocks 210 are provided with second connecting holes;

[0044] The piston rod 320 is provided with a through hole along its radial direction, and a connecting rod 321 is provided in the through hole. Two ends of the connecting rod 321 extend out of the through hole and extend into the second connecting hole to be rotatably connected to the mounting block 210 .

[0045] Specifically, a through hole is opened on the piston rod 320, and a connecting rod 321 is arranged on the through hole. Both ends of the connecting rod 321 extend out of the through hole, and the two ends extending out of the through hole extend into the second connecting hole respectively and can rotate in the second connecting hole, thereby realizing a rotatable connection between the piston rod 320 and the fork 200.

[0046] Further, the first connection portion is located at an upper end of the door frame 100 , and the second connection portion is located at a lower end of the door frame 100 .

[0047] The third connection portion is located at the upper end of the fork 200 , and the fourth connection portion is located at the lower end of the fork 200 .

[0048] The first connection part and the third connection part are at the upper end, and the second connection part and the fourth connection part are at the lower end, so that the distance between the driving cylinder 300 and the rotation axis of the fork 200 can be extended, and the ratio of the extension amount of the piston rod 320 to the rotation angle of the fork 200 can be increased, so that the driving cylinder 300 can more accurately control the rotation angle of the fork 200.

[0049] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A mechanism for adjusting the pitch angle of a fork, characterized in that: include: A gantry, wherein the gantry is provided with a first connection portion and a second connection portion; the fork is provided with a third connection portion and a fourth connection portion, and the third connection portion is rotatably connected to the first connection portion; The driving oil cylinder comprises a cylinder body and a piston rod, wherein the cylinder body is rotatably connected to the second connecting part, and the piston rod is rotatably connected to the fourth connecting part.

2. The fork pitch angle adjustment mechanism according to claim 1, characterized in that: A connecting frame is also provided on the second connecting portion, the connecting frame includes a connecting plate for connecting with the door frame, and side plates arranged on both sides of the connecting plate, and the side plates are provided with a first connecting hole; A connecting column is respectively provided on both sides of the cylinder body, and the connecting column can be rotatably arranged in the first connecting hole.

3. The fork pitch angle adjustment mechanism according to claim 2, characterized in that: A gasket is arranged in the first connecting hole, and the gasket is sleeved on the connecting column.

4. The mechanism for adjusting the pitch angle of a fork according to claim 2, characterized in that: A connecting block is respectively arranged on both sides of the cylinder body, and the connecting column is threadedly connected to the connecting block.

5. The mechanism for adjusting the pitch angle of a fork according to claim 2, characterized in that: The connecting plate is connected to the door frame by bolts.

6. The mechanism for adjusting the pitch angle of a fork according to claim 1, characterized in that: The fork is provided with two mounting blocks, and the mounting blocks are provided with second connecting holes; A through hole is opened on the piston rod along its radial direction, a connecting rod is arranged in the through hole, and two ends of the connecting rod respectively extend out of the through hole and extend into the second connecting hole to be rotatably connected to the mounting block.

7. The mechanism for adjusting the pitch angle of a fork according to claim 1, characterized in that: The first connection portion is located at the upper end of the door frame, and the second connection portion is located at the lower end of the door frame.

8. The fork pitch angle adjustment mechanism according to claim 1, characterized in that: The third connection portion is located at the upper end of the fork, and the fourth connection portion is located at the lower end of the fork.

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