Load limiting device of chain block

Abstract

The utility model discloses a chain block load limiting device which comprises a load limiting disc and a load limiting device base, the load limiting disc is of an annular structure, a shaft sleeve of the load limiting device base penetrates through a center hole of the load limiting disc and is arranged in the center hole of the load limiting disc, the inner circumferential face of the load limiting disc is arranged on the outer circumferential face of the load limiting device base in a sleeved mode, and the load limiting disc is of an annular structure. The load limiting disc abuts against the outer circumferential face of the load limiting device base, the long shaft is sleeved with the load limiting device base and fixed to the long shaft, the load limiting disc and the long shaft cannot move relatively, the load limiting disc and the load limiting device base are connected in a fastened mode through an external nut, and adjusting gaskets are arranged on the load limiting device base and the load limiting disc. According to the load limiting device of the chain block adopting the structure, the friction force between the load limiting disc and the load limiting device seat is adjusted by the adjusting gasket, so that the load limiting function is achieved, the structure is simple, the cost is low, the installation and the use are convenient, and the safety coefficient can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting equipment, in particular to a load limiting device for a chain block. Background Art

[0002] During the use of a chain block, by manually pulling the hand chain, the hand chain drives the chain block to rotate. Through the reduction of the internal gear set of the chain block, the hoisting sprocket is then driven to rotate, driving the hoisting sprocket to rise / fall, so as to lift or lower heavy objects. Since the strengths of different operators are different, the phenomenon of overloading of the chain block may occur. If the overload is too large, it may damage the chain block or even cause accidents. Content of the Utility Model

[0003] The purpose of the utility model is to provide a load limiting device for a chain block, which solves the problem that the hand chain wheel will slip and the heavy object cannot rise after the lifted heavy object exceeds the rated load, and ensures the safety of hoisting operations.

[0004] To achieve the above purpose, the utility model provides a load limiting device for a chain block, including a load limiting disc and a load limiter seat. The load limiting disc is of an annular structure. The bushing of the load limiter seat penetrates through the central hole of the load limiting disc and is arranged in the central hole of the load limiting disc. The inner circumferential surface of the load limiting disc is sleeved on the outer circumferential surface of the load limiter seat and abuts against the outer circumferential surface of the load limiter seat. It also includes a long shaft. The load limiter seat is sleeved on the long shaft and fixed to the long shaft, and the two cannot move relative to each other. The load limiting disc and the load limiter seat are fixedly connected by an external nut, and adjusting gaskets are arranged on the load limiter seat and the load limiting disc.

[0005] Preferably, in the above load limiting device for a chain block, the load limiting disc is provided with a first step, and the load limiter seat is provided with a second step. The first step and the second step abut against each other, and there is friction between them under the fastening of the external nut.

[0006] Preferably, in the above load limiting device for a chain block, the load limiter seat is provided with a groove for filling the adjusting gasket, and the friction between the load limiter seat and the load limiting disc is adjusted through the adjusting gasket.

[0007] Preferably, in the above load limiting device for a chain block, the outer surface of the load limiter seat is provided with threads for connecting the external nut.

[0008] Therefore, the overload limiting device of the chain block of the present utility model adopts the above structure. The friction force between the overload limiting disc and the overload limiting seat is increased under the fastening of the external nut. The friction force between the overload limiting disc and the overload limiting seat is adjusted by using the adjusting gasket to achieve the overload limiting function, so that the chain block stops working after reaching the overload capacity, and the friction force can be adjusted through the setting of the adjusting gasket. The overload limiting device has a simple structure, low cost, is convenient for installation and use, and can improve the safety factor.

[0009] The technical solution of the present utility model will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0010] Figure 1 is a schematic structural view of an embodiment of the overload limiting device of the chain block of the present utility model;

[0011] Figure 2 is a cross-sectional view of an embodiment of the overload limiting device of the chain block of the present utility model. Detailed Embodiments

[0012] The technical solution of the present utility model will be further described below with reference to the drawings and embodiments.

[0013] Unless otherwise defined, the technical terms or scientific terms used in the present utility model should have the ordinary meaning understood by those with ordinary skills in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object to be described changes, the relative positional relationship may also change accordingly.

[0014] Refer to Figure 1-2 As shown, the present application provides an overload limiting device for a chain block, including an overload limiting disc 1 and an overload limiting seat 2. The overload limiting disc 1 is of an annular structure. The bushing of the overload limiting seat 2 penetrates through the central hole of the overload limiting disc 1 and is arranged in the central hole of the overload limiting disc 1. The inner circumferential surface of the overload limiting disc 1 is sleeved on the outer circumferential surface of the overload limiting seat 2 and abuts against the outer circumferential surface of the overload limiting seat 2. It further includes a long shaft 3. The overload limiting seat 2 is sleeved on the long shaft 3 and fixed to the long shaft 3, and the two cannot move relative to each other. The overload limiting disc 1 and the overload limiting seat 2 are fixedly connected by an external nut, and an adjusting gasket 4 is arranged on the overload limiting seat 2 and the overload limiting disc 1.

[0015] To further optimize the above technical solution, the load-limiting disc 1 is provided with a first step 11, and the load-limiting base 2 is provided with a second step 21. The first step 11 and the second step 21 are in contact with each other, and there is friction between them under the fastening of an external nut.

[0016] To further optimize the above technical solution, a groove is provided on the load-limiting base 2. The groove is used to fill the adjusting gasket 4, and the friction between the load-limiting base 2 and the load-limiting disc 1 is adjusted by the adjusting gasket 4.

[0017] To further optimize the above technical solution, the outer surface of the load-limiting base 2 is provided with threads for connecting an external nut.

[0018] Working principle: The friction between the load-limiting disc 1 and the load-limiting base 2 is increased under the fastening of an external nut. The adjusting gasket 4 is used to adjust the friction between the load-limiting disc 1 and the load-limiting base 2 so as to achieve the function of load limitation. When the staff is pulling the load-limiting disc 1, if the friction does not exceed the load-limiting friction, the load-limiting base 2 and the load-limiting disc 1 are integrated and the lifting effect can be achieved. If the hand-pulling force increases during illegal and overloaded use and the existing friction cannot reach the required friction for use, the load-limiting base 2 and the load-limiting disc 1 will be separated. The result is that the staff pulls the load-limiting disc 1, but the load-limiting base 2 does not work, and thus the hoist cannot be lifted.

[0019] Therefore, the load-limiting device of a hand-operated hoist adopting the above structure in the present utility model increases the friction between the load-limiting disc and the load-limiting base under the fastening of an external nut, and uses the adjusting gasket to adjust the friction between the load-limiting disc and the load-limiting base so as to achieve the function of load limitation, enabling the hand-operated hoist to stop working after reaching the load-limiting capacity, and being able to adjust its friction through the setting of the adjusting gasket. This load-limiting device has a simple structure, low cost, is convenient for installation and use, and can improve the safety factor.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present utility model, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present utility model.

Claims

1. A load limit device for a chain block, characterized in that The cam is secured to the cam frame and is adapted to engage said support member and to engage with said guide rail when said lever is in engagement with said support member, said guide rail being secured to said support member when said lever is in engagement with said support member.

2. The overload limiting device of a chain block according to claim 1, characterized in that, The load limiter seat is provided with a groove, and the groove is used to fill an adjusting gasket, and the friction force between the load limiter seat and the load limiter plate is adjusted by the adjusting gasket.

3. The overload limiting device of a chain block according to claim 1, characterized in that, The outer surface of the load limiter seat is provided with threads for connecting an external nut.

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