CN216272835U

CN216272835U - Brake device of hand hoist

Info

Publication number: CN216272835U
Application number: CN202120512392.5U
Authority: CN
Inventors: 张贺成; 陈树忠
Original assignee: Zhejiang Zhexing Machinery Equipment Co ltd
Current assignee: Zhejiang Zhexing Machinery Equipment Co ltd
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2022-04-12
Anticipated expiration: 2031-03-02

Abstract

The utility model discloses a brake device of a hand hoist, which consists of a brake, a ratchet wheel and two pawl components, wherein the brake comprises a brake seat which is connected with a long shaft through a spline, the ratchet wheel is sleeved on the brake seat in an empty manner, each pawl component consists of a pawl pin which is riveted on a wall plate, and a torsion spring, a pawl and a shaft end stop spring which are sequentially arranged on the pawl pin, wherein the torsion spring is sleeved on the pawl pin in an empty manner, one end of the torsion spring is fixed on the wall plate, the other end of the torsion spring is clamped on the pawl, the shaft end stop ring is fixed at the end part of the pawl pin, the pawl of each pawl component consists of a pawl body and a pawl counterweight body which are integrated, and the weight of the pawl counterweight body is greater than that of the pawl body. After the technical scheme is adopted, when the elasticity of the torsion spring is weakened and even fails, the effective meshing between the pawl and the ratchet wheel can be still ensured, and the failure of the braking performance of the braking device is avoided, so that the safety accident of hoisting operation caused by the failure of braking is avoided, and the damage to the body of the manual hoist is avoided.

Description

Brake device of hand hoist

[ technical field ] A method for producing a semiconductor device

The utility model relates to a brake device of a hand-operated hoist, belonging to the technical field of hand-operated hoists and lever hoists.

[ background of the utility model ]

At present, a braking device of a manual hoist mainly comprises a pawl pin, a pawl torsion spring, a brake seat, a ratchet wheel and a friction plate, and the braking device is used for realizing braking when the manual hoist is in any working position. In the actual use process, the elasticity of the pawl torsion spring is weakened, so that the pawl and the ratchet wheel can not be reliably and effectively engaged sometimes, and the brake failure phenomenon is caused.

In view of the above, the brake device of the conventional hand-operated hoist needs to be improved.

[ Utility model ] content

The technical problem to be solved by the utility model is to provide a brake device of a hand-operated hoist aiming at the defects of the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a brake equipment of hand hoist, it comprises a stopper, a ratchet and two pawl subassemblies, the stopper includes that the spline couples in the stopper seat on the major axis, the empty cover of ratchet is on the stopper seat, each pawl subassembly by the riveting on the wallboard pawl round pin and adorn in proper order in the torsional spring on the pawl round pin, the pawl, the axle head keeps off the spring and constitutes, wherein, the empty cover of torsional spring is on the pawl round pin, the one end of torsional spring is fixed on the wallboard and its other end joint is on the pawl, the tip at the pawl round pin is fixed to the axle head retaining ring, its improvement point lies in: the pawl of each pawl component is integrally formed by a pawl body and a pawl counter weight body, and the weight of the pawl counter weight body is greater than that of the pawl body.

The inner edge of the head of the pawl counterweight body approaches the top surface of the ratchet wheel.

Compared with the prior art, the utility model has the advantages that:

because each pawl subassembly comprises pawl body and pawl counter weight body an organic whole, and the weight of pawl counter weight body is greater than the weight of pawl body, so when the elasticity of torsional spring weakens or even loses efficacy, still can ensure pawl and ratchet effective meshing, avoided this arresting gear's braking performance to lose efficacy to stop because of the emergence of the jack-up operation incident that the braking became invalid, and to the damage of hand-operated block organism.

[ description of the drawings ]

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the present invention.

[ detailed description ] embodiments

Referring to fig. 1, a brake device of a hand hoist comprises a brake, a ratchet wheel 2 and two pawl assemblies, wherein the brake comprises a brake seat 10 connected to a long shaft 6 through a spline, the ratchet wheel 2 is freely sleeved on the brake seat 10, each pawl assembly comprises a pawl pin riveted on a wall plate 4, a torsion spring, a pawl and a shaft end stop spring which are sequentially arranged on the pawl pin, the torsion spring is freely sleeved on the pawl pin, one end of the torsion spring is fixed on the wall plate 4, the other end of the torsion spring is clamped on the pawl, the shaft end stop ring is fixed at the end part of the pawl pin, the improvement point is that the pawl of each pawl assembly is integrally formed by a pawl body and a pawl counter weight body, and the weight of the pawl counter weight body is greater than that of the pawl body.

The long shaft 6 is rotatably supported on the wall plate 4 (two spaced apart, only one shown).

In fig. 1, the two pawl assemblies are divided into an upper pawl assembly disposed above the ratchet wheel 2 and a lower pawl assembly disposed below the ratchet wheel 2.

The upper pawl component consists of an upper pawl pin 31 riveted on the wall plate 4, an upper torsion spring 32, an upper pawl 33 and an upper shaft end retaining ring 34 which are sequentially arranged on the upper pawl pin 31, wherein the upper torsion spring 32 is sleeved on the upper pawl pin 31 in a hollow mode, one end of the upper torsion spring 32 is fixed in an upper clamping hole 4a formed in the wall plate 4, the other end of the upper torsion spring 32 is clamped on the upper pawl 33, and the upper shaft end retaining ring 34 is fixed at the end portion of the upper pawl pin 31. The upper pawl 33 is provided with an installation through hole (not shown), and the upper pawl balance weight body 332 and the upper pawl body 331 are located on the left side and the right side of the installation through hole.

The inner edge of the head of the upper pawl balance weight body 332 approaches the top surface of the ratchet teeth of the ratchet wheel 2, i.e. there is a gap between the inner edge of the head of the upper pawl balance weight body 332 and the top surface of the ratchet teeth of the ratchet wheel 2, in the specific implementation, the gap between the inner edge of the head of the upper pawl balance weight body 332 and the top surface of the ratchet teeth of the ratchet wheel 2 is 0.5 mm.

The lower pawl component consists of a lower pawl pin 51 riveted on the wall plate 4, a lower torsion spring 52, a lower pawl 53 and a lower shaft end retainer ring 54 which are sequentially arranged on the lower pawl pin 51, wherein the lower torsion spring 52 is sleeved on the lower pawl pin 51 in a hollow way, one end of the lower torsion spring 52 is fixed in a lower clamping hole 4b formed in the wall plate 4, the other end of the lower torsion spring 52 is clamped on the lower pawl 53, and the lower shaft end retainer ring 54 is fixed at the end part of the lower pawl pin 51. The lower pawl 53 is provided with an installation through hole (not shown), and the lower pawl body 531 and the lower pawl counterweight 532 are located on the left and right sides of the installation through hole.

The inner edge of the head of the lower pawl weight 532 approaches the top surface of the ratchet teeth of the ratchet wheel 2, i.e. there is a gap between the two, in practice, the gap between the inner edge of the head of the lower pawl weight 532 and the top surface of the ratchet teeth of the ratchet wheel 2 is 0.5 mm.

The lower pawl counter weight 532 added on the basis of the conventional lower pawl 53 has the weight larger than that of the lower pawl body 531, so that the material selection requirement and the elasticity requirement of the lower torsion spring 52 are low, and the cost of the lower torsion spring 52 is correspondingly reduced.

The brake is a known structure, and comprises a brake base 10, and two friction plates and a ratchet 2, wherein the two friction plates are sleeved on the brake base 10 in an empty manner, and the two friction plates are respectively positioned at two sides of the ratchet 2 (the two friction plates are not shown).

The upper pawl 33 and the lower pawl 53 have the same structure and are interchangeable.

The utility model can be applied to chain blocks or lever blocks.

Claims

1. A brake device of a hand hoist comprises a brake, a ratchet wheel and two pawl assemblies, wherein the brake comprises a brake seat connected with a long shaft through a spline, the ratchet wheel is sleeved on the brake seat in a hollow way,

each pawl component consists of a pawl pin riveted on the wall board, a torsion spring, a pawl and a shaft end baffle spring which are sequentially arranged on the pawl pin, wherein the torsion spring is sleeved on the pawl pin in an empty way, one end of the torsion spring is fixed on the wall board, the other end of the torsion spring is clamped on the pawl, a shaft end baffle ring is fixed at the end part of the pawl pin,

the method is characterized in that: the pawl of each pawl component is integrally formed by a pawl body and a pawl counter weight body, the weight of the pawl counter weight body is greater than that of the pawl body, and the pawl counter weight body and the pawl body are positioned on two sides of the pawl pin; the inner edge of the head of the pawl counterweight body approaches the top surface of the ratchet wheel.