CN212712520U

CN212712520U - Long shaft for chain block

Info

Publication number: CN212712520U
Application number: CN202021452898.3U
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: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-03-16
Anticipated expiration: 2030-07-13

Abstract

The utility model discloses a long axis that chain block used belongs to chain block part technical field. The long shaft comprises a main body section, a tooth part positioned on the right side of the main body section and used for being meshed with the short shaft piece gear assembly, and a shaft neck section positioned on the left side of the main body section and used for installing a needle bearing. After the steps are reasonably arranged on the long shaft, the long shaft does not axially move in the lifting operation process of the chain block, so that the tooth part of the long shaft is ensured to be well meshed with the sheet gear of the short shaft sheet gear assembly all the time without deviation, and the transmission efficiency of the chain block is ensured; after the long shaft does not axially move any more, the end face of the needle bearing does not rub against the step between the journal section and the main body section any more, and the needle bearing does not bear extra force any more, so that the needle bearing is more durable.

Description

Long shaft for chain block

[ technical field ] A method for producing a semiconductor device

The utility model relates to a long axis that chain block used belongs to chain block part technical field.

[ background of the invention ]

Referring to fig. 3 and 4, in the chain block, the right end of the long shaft is provided with a tooth 2', and the long shaft is generally called a five-tooth long shaft in the hoisting industry.

The structure of the long shaft comprises a body section 1 ', a tooth section 2 ' on the right side of the body section and a journal section 3 ' on the left side of the body section. The hoisting chain wheel 6 ' is in hollow fit with the long shaft, the right end of the long shaft is supported on an end cover plate 7 ' of the speed reducer through a bearing 51 ', the long shaft is arranged in a shaft neck section of the long shaft through a needle bearing 5 ' in a seat hole (not shown) of the hoisting chain wheel 6 ', and the hoisting chain wheel is supported on the two side wall plates B ' through two large bearings F '. In addition, the hand chain wheel 8' is in threaded connection with the long shaft transmission.

Because the space of the seat hole of the hoisting chain wheel 6 'is limited, the transition step between the journal section 3' and the main body section 1 'is narrow, and in the lifting operation process of the chain block, the hand chain wheel 8' is driven, and then the long shaft axially moves, so that friction exists between the end surface of the needle bearing 5 'and the transition step, the needle bearing 5' has extra stress to influence the normal service life of the chain block, and the problem of poor meshing between the tooth part 2 'of the long shaft and the segment gear of the short shaft segment gear assembly 4' is caused, thereby influencing the transmission efficiency of the chain block.

[ Utility model ] content

The utility model aims at providing a long axis that chain block used to the not enough of above-mentioned prior art existence.

Therefore, the utility model adopts the following technical scheme:

the long shaft for chain block includes main body section, tooth part on the right side of the main body section for meshing with the short shaft gear assembly and shaft neck section on the left side of the main body section for installing needle bearing.

The utility model has the advantages of as follows and effect:

the steps are arranged on the long shaft and the positions of the steps are reasonable, and the long shaft does not axially move any more in the lifting operation process of the chain block, so that the tooth part of the long shaft is ensured to be well meshed with the sheet gear of the short shaft sheet gear assembly all the time without deviation, and the transmission efficiency of the chain block is ensured.

After the long shaft does not axially move any more, the end face of the needle bearing does not have unnecessary friction with the transition step between the journal section and the main body section, and the needle bearing does not bear extra force, so that the needle bearing is more durable.

[ description of the drawings ]

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

Fig. 1 is a schematic view of the long shaft of the present invention assembled on a chain block;

fig. 2 is a schematic long axis view of the present invention;

FIG. 3 is a schematic view of a prior art long shaft;

fig. 4 is a schematic view of a long shaft assembled on a chain block.

[ detailed description ] embodiments

Referring to fig. 1 and 2, a long shaft for a chain block comprises a main body section 1, a tooth section 2 located at the right side of the main body section 1 for meshing with a stud plate gear assembly 4, and a journal section 3 located at the left side of the main body section 1 for mounting a needle roller bearing 5, wherein the improvement point is that a step 11 is formed on the main body section 1 adjacent to the tooth section 2, and the step 11 is abutted against a hoisting sprocket 6.

The step 11 has an outer diameter greater than the outer diameter of the main body section 1.

The step 11 is a cold extrusion molding structure.

When the well-known chain block is lifted, a hand chain wheel is driven by manpower through a chain block to compact a brake part, the brake part is connected with a long shaft chain, a tooth part 2 of the long shaft rotates to be meshed with a transmission short shaft sheet gear assembly 4, the short shaft sheet gear assembly 4 is meshed with a spline hole gear, the spline hole gear is connected with a hoisting chain wheel 6 in an inner and outer chain manner, and finally the rotation of the hoisting chain wheel 6 and the traction of the hoisting chain to lift a heavy object are finished.

Because hand sprocket and major axis transmission threaded connection, still usually along with removing a small amount left when the major axis rotates, and lean on the back when step 11 that the major axis system had on its main part section 1 offsets with outer (right) terminal surface of jack-up sprocket 6, axial displacement just no longer takes place for the major axis, consequently its tooth portion of major axis 2 meshes well with the pinion blade gear of minor axis piece gear assembly 4 all the time, has embodied the utility model discloses a progressive.

Claims

1. A long shaft for chain block is composed of a main body segment, a tooth part at right side of said main body segment for engaging with the gear assembly of short shaft segment, and a shaft neck segment at left side of said main body segment for installing needle bearing.