Crankshaft mechanism for pallet fork

Abstract

The utility model provides a crankshaft mechanism for a pallet fork, which comprises a crankshaft body comprising a shaft neck in the middle and a free shaft end and a transmission shaft end at two ends, and the free shaft end and the transmission shaft end are coaxially arranged; the first fixing lug plate is rotationally connected with the outer shaft at the free shaft end, and the second fixing lug plate is rotationally connected with the outer shaft at the transmission shaft end; the fixing base plate is used for fixedly connecting the first fixing lug plate and the second fixing lug plate; the driven body is provided with a long circular shaft hole, and the shaft hole is connected with the shaft neck of the crankshaft body. According to the crankshaft mechanism for the pallet fork, the amplitude design generated by rotation of the crankshaft structure is applied to the pallet fork, and fine adjustment of the pitching angle of the pallet fork can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a loading and unloading technical field, especially a crankshaft mechanism for fork. BACKGROUND

[0002] The fork is the main structure for lifting the goods on the forklift, and the common fork on the forklift is directly fixedly connected with the driving mechanism, and the pitch angle of the fork cannot be finely adjusted. After the fork lifts the goods, the front end of the fork bears the gravity of the goods, and the fork is inclined downward, so that the goods are in a state of being low in front and high in back after being lifted. When the goods are unloaded (that is, the lifted goods are unloaded and placed on the ground or the carriage or other places), the front end of the goods falls to the ground first, that is, the front end of the goods collides with the ground, which not only causes the goods to shake, but also easily causes the goods to be damaged.

[0003] The commonly used pitch adjusting mechanism is too large and difficult to be applied to the fork. Therefore, a mechanism for adjusting the pitch angle of the fork without increasing the size of the fork needs to be designed. SUMMARY

[0004] In order to solve the problems in the prior art, the utility model provides a crankshaft mechanism for fork, which solves the problem of fine adjustment of the pitch angle of the fork without increasing the size of the fork.

[0005] In order to achieve the above-mentioned purpose, the following technical scheme is provided:

[0006] A crankshaft mechanism for fork, comprising:

[0007] The crankshaft body (100) comprises a shaft neck (110) in the middle and free shaft ends (120) and transmission shaft ends (130) at both ends, wherein the free shaft ends (120) and the transmission shaft ends (130) are coaxially arranged;

[0008] The first fixed ear plate (210) is rotatably connected with the outer shaft of the free shaft end (120), and the second fixed ear plate (220) is rotatably connected with the outer shaft of the transmission shaft end (130);

[0009] The fixed base plate (300) is used for fixedly connecting the first fixed ear plate (210) and the second fixed ear plate (220);

[0010] The driven body (400) has an oblong shaft hole (410), and the shaft hole (410) is connected with the shaft neck (110) of the crankshaft body (100).

[0011] A stepped shaft surface (150) is further arranged between the free shaft end (120) and the shaft journal (110), the diameter of the stepped shaft surface (150) is greater than the diameter of the free shaft end (120) but less than the diameter of the shaft journal (110).

[0012] Further, a detachable limiting block (151) is arranged on the stepped shaft surface, the height of the top of the limiting block (151) is higher than the shaft journal (110).

[0013] A boss (160) is arranged between the transmission shaft end (130) and the shaft journal (110), the diameter of the boss (160) is greater than the diameter of the shaft journal (110).

[0014] The transmission shaft end (130) is provided with an inner recessed driving hole (140) for connecting with the driving shaft of the driving device.

[0015] The fixed base plate (300) is provided with a receiving groove (310) corresponding to the position of the driven body (400), so that the driven body (400) will not collide with the fixed base plate (300) when moving towards the fixed base plate (300).

[0016] The length of the shaft hole (410) meets the rotation requirement of the shaft journal (110) for one revolution, and the width of the shaft hole is equal to the diameter of the shaft journal (110).

[0017] Ball bearings are arranged between the first fixed ear plate (210) and the free shaft end (120), between the second fixed ear plate (220) and the transmission shaft end (130), and between the shaft journal (110) and the shaft hole (410) of the driven body (400).

[0018] Compared with the prior art, the advantages of the utility model are as follows:

[0019] The crankshaft mechanism for the fork provided by the utility model is applied to the fork, and the amplitude design generated by the rotation of the crankshaft structure can realize the fine adjustment of the pitch angle of the fork. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a structural schematic view of the crankshaft mechanism for the fork in the embodiment of the utility model;

[0021] Figure 2 FIG. 2 is a transverse sectional view of the crankshaft mechanism for the fork in the embodiment of the utility model;

[0022] Figure 3 FIG. 3 is a longitudinal sectional view of the crankshaft mechanism for the fork in the embodiment of the utility model;

[0023] Figure 4It is the structure schematic view of the crankshaft body in the embodiment of the utility model.

[0024] Figure 5 It is the explosion view of the crankshaft mechanism for the fork in the embodiment of the utility model.

[0025] Figure 6 It is the explosion view of the crankshaft mechanism for the fork in the embodiment of the utility model.

[0026] Figure 7 It is the explosion view of the crankshaft mechanism for the fork in the embodiment of the utility model.

[0027] Figure 8 It is the structure schematic view of the fork in the embodiment of the utility model, and the upper portion of the fork is the crankshaft mechanism.

[0028] In the drawing:

[0029] 100-crankshaft body; 110-journal; 120-free shaft end; 130-driving shaft end; 140-driving hole; 150-step shaft surface; 151-limiting block; 160- boss;

[0030] 210-first fixed lug plate; 220-second fixed lug plate;

[0031] 300-fixed base plate; 310-receiving groove;

[0032] 400-driven body; 410-shaft hole. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiment of the utility model, and obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model described and shown in the drawing here can be arranged and designed in various different configurations. EMBODIMENT

[0034] As Figures 1-7 Indicated, the utility model provides a kind of crankshaft mechanism for fork, comprising:

[0035] Crankshaft body 100, including the journal 110 of middle part and the free shaft end 120 of both ends, driving shaft end 130, wherein the free shaft end 120 and driving shaft end 130 are coaxially arranged;Free shaft end 120 is not connected with other transmission components, only as support rotation is used;Driving shaft end 130 is used to receive external transmission power, to drive crankshaft body 100 to rotate in turn;

[0036] The first fixed lug plate 210 is rotatably connected with the outer shaft of the free shaft end 120, and the second fixed lug plate 220 is rotatably connected with the outer shaft of the transmission shaft end 130; the first fixed lug plate 210 and the second fixed lug plate 220 are connected side by side on the fixed base plate 300, and are used for providing a fixed support basis for the crankshaft body 100;

[0037] The fixed base plate 300 is used for fixedly connecting the first fixed lug plate 210 and the second fixed lug plate 220, and the main function of the fixed base plate 300 is to accept the power of an external power mechanism (such as a lifting mechanism or a horizontal moving mechanism), and then drive the fork to move up and down or horizontally through the crankshaft body and the driven body.

[0038] The driven body 400 has a long circular shaft hole 410, which is connected with the shaft neck 110 of the crankshaft body 100, and the side surface of the driven body 400 can be T-shaped. The shaft hole 410 receives the power of the shaft neck 110, so that the driven body 400 is displaced with the rotation of the shaft neck 110, and then the driven body 400 can drive the fork to change the pitch angle.

[0039] The step shaft surface 150 is further arranged between the free shaft end 120 and the shaft neck 110, the diameter of the step shaft surface 150 is greater than that of the free shaft end 120 but less than that of the shaft neck 110, and the main function of the step surface 150 is to install a limiting structure to limit and fix the bearing on the shaft neck 110.

[0040] Further, the step shaft surface is provided with a detachable limiting block 151, and the top of the limiting block 151 is higher than the shaft neck 110. The limiting block 151 is used for limiting the ball bearing on the shaft neck 110.

[0041] The transmission shaft end 130 is provided with a boss 160 between the transmission shaft end 130 and the shaft neck 110, and the diameter of the boss 160 is greater than that of the shaft neck 110. The boss 160 is used for limiting the ball bearing, and one end of the ball bearing is determined to be installed in the boss 160.

[0042] The transmission shaft end 130 is provided with an inner recessed driving hole 140 for connecting with the driving shaft of a driving device. The driving device can be a planetary reducer or a bevel gear reducer driven by a motor. Through the connection of the driving hole 140 and the driving shaft, the structure is more compact without the need for a shaft coupling structure.

[0043] The fixed base plate 300 is provided with a receiving groove 310 corresponding to the position of the driven body 400, so that the driven body 400 does not collide with the fixed base plate 300 when moving to the fixed base plate 300, thereby making the structure more compact.

[0044] The length of the shaft hole 410 meets the rotation requirement of the journal 110 for one revolution, and the width of the shaft hole is equal to the diameter of the journal 110.

[0045] Ball bearings are respectively provided between the first fixed lug 210 and the free shaft end 120, between the second fixed lug 220 and the transmission shaft end 130, and between the journal 110 and the shaft hole 410 of the driven body 400. The first fixed lug 210 and the second fixed lug 220 are respectively provided with stepped surfaces to accommodate the ball bearings, and the stepped surfaces are both located on the side closer to the transmission shaft end 130.

[0046] Compared with the prior art, the advantages of this utility model are as follows:

[0047] The crankshaft mechanism for forks provided by this utility model, through the amplitude design generated by the rotation of the crankshaft structure, can be applied to the forks to achieve fine adjustment of the pitch angle of the forks.

[0048] like Figure 8 As shown, this utility model provides an example of applying a crankshaft mechanism to a fork. Because the crankshaft mechanism is applied to the upper part of the fork, the fork can be finely adjusted for pitch angle. In addition to the crankshaft mechanism, the fork also needs to be fitted with a hinge structure, for example... Figure 8 The lower part of the forks, as shown, provides support and allows the forks to rotate around the hinge, thereby achieving pitch angle adjustment.

[0049] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A crank mechanism for a fork, characterized by, The crankshaft mechanism comprises: a crankshaft body (100) comprising a journal (110) in the middle and a free shaft end (120) and a transmission shaft end (130) at both ends, wherein the free shaft end (120) and the transmission shaft end (130) are coaxially arranged; a first fixed lug plate (210) and a second fixed lug plate (220), wherein the first fixed lug plate (210) is rotatably connected to the outer shaft of the free shaft end (120), and the second fixed lug plate (220) is rotatably connected to the outer shaft of the transmission shaft end (130); a fixed base plate (300) for fixedly connecting the first fixed lug plate (210) and the second fixed lug plate (220); a driven body (400) having an oblong shaft hole (410) connected to the journal (110) of the crankshaft body (100).

2. The crankshaft mechanism according to claim 1, wherein a stepped shaft surface (150) is further arranged between the free shaft end (120) and the journal (110), and the diameter of the stepped shaft surface (150) is greater than that of the free shaft end (120) but smaller than that of the journal (110).

3. The crankshaft mechanism according to claim 2, wherein a detachable limiting block (151) is installed on the stepped shaft surface, and the vertex height of the limiting block (151) is higher than that of the journal (110).

4. The crankshaft mechanism according to claim 1, wherein a boss (160) is arranged between the transmission shaft end (130) and the journal (110), and the diameter of the boss (160) is greater than that of the journal (110).

5. The crankshaft mechanism according to claim 1, wherein the transmission shaft end (130) is provided with an inner recessed driving hole (140) for connecting with a driving shaft of a driving device.

6. The crankshaft mechanism according to claim 5, wherein a receiving groove (310) is arranged on the fixed base plate (300) corresponding to the position of the driven body (400) so that the driven body (400) will not collide with the fixed base plate (300) when moving towards the fixed base plate (300).

7. The crankshaft mechanism according to claim 5, wherein the length of the shaft hole (410) meets the rotation requirement of the journal (110) for one revolution, and the width of the shaft hole is equal to the diameter of the journal (110).

8. The crankshaft mechanism according to claim 1, wherein ball bearings are arranged between the first fixed lug plate (210) and the free shaft end (120), between the second fixed lug plate (220) and the transmission shaft end (130), and between the journal (110) and the shaft hole (410) of the driven body (400), respectively.

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