CN210313289U

CN210313289U - Improved ratchet wheel structure of hand chain block braking device

Info

Publication number: CN210313289U
Application number: CN201921296659.0U
Authority: CN
Inventors: 陈树忠; 黎士存; 张哲兴
Original assignee: Hebei Chenghua Machinery Manufacturing Co Ltd
Current assignee: Hebei Chenghua Machinery Manufacturing Co Ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-04-14
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses a chain block arresting gear's ratchet improves structure belongs to chain block technical field. The ratchet wheel comprises a ratchet wheel body with a central hole and a ratchet, wherein the outer end of the ratchet wheel body consists of an annular blocking edge and a shallow groove, the annular blocking edge is formed by protruding along the outer side surface of the ratchet, and the groove bottom wall of the shallow groove is of an outer friction plane structure. The utility model discloses the ratchet adds cyclic annular flange and can play the effect that blocks well-known structure's last pawl, lower pawl axial skew outwards, goes up pawl, lower pawl all with ratchet meshing good and wearing and tearing even.

Description

Improved ratchet wheel structure of hand chain block braking device

[ technical field ] A method for producing a semiconductor device

The utility model relates to a chain block arresting gear's ratchet improves structure belongs to chain block technical field.

[ background of the invention ]

The ratchet wheel is the main component of the chain block braking device, and the ratchet wheel is separated from the inner friction plate and the outer friction plate and is matched with the pawl to complete braking; the ratchet wheel is also used as a transmission part, and the ratchet wheel and the inner and outer friction plates frictionally transmit power under the action of external force extrusion to finish the lifting of the heavy object.

The common structure of the ratchet wheel part for the chain block is a wheel body structure, the outer circumferential surface of the wheel body is provided with ratchets, and the center of the wheel body is provided with a through hole.

The lifting of the pawl and the insertion of the pawl into the engaged ratchet wheel need the energy storage and release of the torsion spring to be implemented in a matched mode, the energy release process of the torsion spring is accompanied by the deviation of the pawl towards the outer end direction of the pawl pin, the pawl is only partially engaged with the ratchet teeth of the ratchet wheel, and the abrasion is not uniform.

[ Utility model ] content

The to-be-solved technical problem of the utility model is to provide a chain block arresting gear's ratchet improves structure to the not enough of above-mentioned prior art existence, makes the ratchet good, the wearing and tearing are even with the pawl meshing.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the improved ratchet wheel structure for hand chain block brake includes ratchet wheel body with central hole and ratchet, and features that the outer end of the ratchet wheel body consists of annular blocking edge and shallow slot, the annular blocking edge is formed along the outer side of the ratchet and the slot bottom wall of the shallow slot is outer friction plane structure.

The inner end surface of the ratchet wheel body is of an inner friction plane structure.

The inner end surface structure of the ratchet wheel body can improve the working reliability with the inner friction plate.

Compared with the prior art, the utility model has the advantages of as follows and positive effect:

the utility model discloses the ratchet adds cyclic annular flange and can play the effect that blocks well-known structure's last pawl, lower pawl axial skew outwards, goes up pawl, lower pawl all with ratchet meshing good and wearing and tearing even.

[ description of the drawings ]

FIG. 1 is a perspective view of the ratchet of the present invention;

FIG. 2 is another perspective view of the ratchet of the present invention;

fig. 3 is a schematic structural view of the ratchet wheel assembled on the chain block of the present invention.

[ detailed description ] embodiments

Referring to fig. 1-3, an improved ratchet structure of a chain block braking device comprises a ratchet body having a central hole 1 and ratchet teeth (gear teeth) 2, and is characterized in that an outer end 3 of the ratchet body is composed of an annular retaining edge 31 and a shallow groove 32, wherein the annular retaining edge 31 is formed by protruding along an outer side surface of the ratchet teeth 2, and a groove bottom wall of the shallow groove 32 is of an outer friction plane structure.

The annular blocking edge 31 connects the outer side faces of all the ratchet teeth together, and after the annular blocking edge 31 is connected with the outer side faces of the ratchet teeth together, the annular blocking edge 31 serves as an organic whole of the ratchet wheel, so that the overall structure is compact.

The inner end surface 4 of the ratchet body is of an inner friction plane structure.

The upper and lower pawl assemblies of known construction are universally interchangeable. The upper pawl assembly consists of an upper pawl pin (not shown) fixedly arranged at the upper part of the left wall plate B, a torsion spring and an upper pawl 5 which are respectively sleeved on the upper pawl pin, and a check ring arranged on an annular groove at the outer end of the upper pawl pin, wherein two ends of the torsion spring are respectively fixed on the left wall plate B and the upper pawl 5; the lower pawl component consists of a lower pawl pin (not shown) fixedly arranged at the lower part of the left wall plate B, a torsion spring and a lower pawl 6 which are respectively sleeved on the lower pawl pin, and a check ring arranged on an outer end annular groove of the lower pawl pin, wherein two ends of the torsion spring are respectively fixed on the left wall plate B and the lower pawl 6.

The brake seat 8 of the brake device is provided with a flange part 82 and a necking part 81 which is connected with the flange part in a transition mode into a whole, and an inner friction plate 92, a ratchet wheel and an outer friction plate 91 are sequentially sleeved on the necking part 81 from inside to outside in a hollow mode. Wherein, the outer friction plate 91 falls into the shallow groove 32, and the friction working surface (inner side surface) of the outer friction plate 91 is in separable contact with the groove bottom wall of the shallow groove 32; the inner friction plate 92 has inner and outer friction surfaces which are in separable contact with the flange 82 and the inner end surface 4 of the ratchet body.

The brake housing 8 is splined to the long shaft 7, and specifically, the constricted portion 81 has a splined bore (not shown), and the section of the long shaft 7 where the constricted portion 81 is mounted is externally splined.

Claims

1. An improved ratchet wheel structure of a chain block braking device comprises a ratchet wheel body with a central hole and ratchet teeth, and is characterized in that the outer end of the ratchet wheel body consists of an annular blocking edge and a shallow groove, wherein the annular blocking edge is formed by protruding the outer side surface of the ratchet teeth, and the groove bottom wall of the shallow groove is of an outer friction plane structure.

2. The improved ratchet wheel structure of the chain block braking device of claim 1, wherein: the inner end surface of the ratchet wheel body is of an inner friction plane structure.