CN212985785U - Long shaft end part thread improved structure of chain block - Google Patents
Long shaft end part thread improved structure of chain block Download PDFInfo
- Publication number
- CN212985785U CN212985785U CN202021424960.8U CN202021424960U CN212985785U CN 212985785 U CN212985785 U CN 212985785U CN 202021424960 U CN202021424960 U CN 202021424960U CN 212985785 U CN212985785 U CN 212985785U
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- thread
- section
- chain block
- shaft end
- connecting section
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Abstract
The utility model discloses a chain block's major axis tip screw thread improves structure belongs to chain block major axis part technical field. The long shaft is provided with a shaft end journal at the left end, the periphery of the shaft end journal is provided with threads, the threads consist of a thread starting section and a thread connecting section, and the outer diameter of the thread starting section is 1mm smaller than that of the thread connecting section. After the technical scheme is adopted, the threads are formed on the periphery of the shaft end journal and consist of the thread starting section and the thread connecting section with different thread outer diameters, when the thread teeth of the thread starting section are slightly damaged, the smooth screwing-in of the slotted nut is not influenced, the slotted nut is smoothly screwed onto the thread connecting section and fixed, and the problem that the thread teeth which are fluffed or damaged on the thread starting section need to be repaired by the hinge plate teeth is avoided.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a chain block's major axis tip screw thread improves structure belongs to chain block major axis part technical field.
[ background of the invention ]
Referring to fig. 1, in the chain block, the right end of the long shaft is provided with a tooth 4', and the long shaft is generally called a five-tooth long shaft in the hoisting industry.
The structure of the long shaft comprises a main body section 3 ', a tooth part 4' positioned at the right side of the main body section, a shaft neck section 5 'positioned at the left side of the main body section, a multi-thread section 9' positioned at the left side of the shaft neck section 5 'and used for being matched with a hand chain wheel transmission screw, and a shaft end shaft neck 1' positioned at the leftmost end.
The long shaft is assembled on a well-known chain block, a hoisting chain wheel is in hollow fit with the long shaft, the right end of the long shaft is supported on an end cover plate of the speed reducer through a bearing, the long shaft is arranged in a seat hole of the hoisting chain wheel at the shaft neck section of the long shaft through a needle bearing, and the hoisting chain wheel is supported on two side wall plates through two large bearings. Wherein, the shaft end journal 1 'is provided with a mounting hole 10' for the cotter pin to insert, and the slotted nut is screwed to the shaft end journal 1 'and then fixed on the shaft end journal 1' through the cotter pin.
During the assembly process of the chain block complete machine, the thread 2 'at the shaft end journal 1' is easy to be accidentally collided due to careless operation, the slotted nut is difficult to be smoothly screwed up after the thread 2 'rubs traces and even is damaged, and the thread 2' at the fluffed or damaged part is sometimes required to be repaired by a hinged die; in the maintenance process of the whole machine or in the field of dredging management, the chain wheel cover of the chain block is often not installed and returned in time, the exposed chain block is randomly placed on the ground, the long shaft protected by the chain wheel cover is lost, the probability that the thread 2 'of the shaft end journal 1' is collided and damaged is greatly increased, the crest diameter D 'of the thread 2' is 10mm, and the root diameter is 8 mm.
[ Utility model ] content
The utility model aims at providing a long axis tip screw thread improved structure of chain block to the not enough of above-mentioned prior art existence.
Therefore, the utility model adopts the following technical scheme:
the utility model provides a long axis end screw thread improves structure of chain block, this long axis has the axle head axle journal at its left end, and the periphery system of axle head axle journal has the screw thread, and its improvement lies in: the thread consists of a thread starting section and a thread connecting section, and the outer diameter of the thread starting section is 1mm smaller than that of the thread connecting section.
The outer diameter of the thread starting section is 9 mm; the external diameter of the threaded connecting section is 10 mm.
The utility model has the advantages of as follows and effect:
the periphery of the shaft end journal is provided with threads, and the threads consist of thread starting sections and thread connecting sections with different thread outer diameters, when thread teeth of the thread starting sections are slightly damaged, the smooth screwing of the slotted nut is not influenced, the slotted nut is smoothly screwed onto the thread connecting sections and fixed, and the problem that the thread teeth which are fluffed or damaged on the thread starting sections need to be repaired by using a hinged die is avoided.
[ 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 a prior art long shaft;
FIG. 2 is a schematic view of the present invention with a slotted nut mounted on the long shaft;
fig. 3 is a schematic long axis view of the present invention;
fig. 4 is a schematic view of the long shaft of the present invention assembled on the chain block.
[ detailed description ] embodiments
Please refer to fig. 2 and 3, which illustrate a preferred embodiment of the present invention.
The utility model provides a chain block's major axis tip screw thread improves structure, this major axis is equipped with axle head axle journal 1 at its left end, and the periphery system of axle head axle journal 1 has screw thread 2, and its improvement lies in: the thread 2 consists of a thread starting section 21 and a thread coupling section 22, and the outer diameter 21D of the thread starting section is 1mm smaller than the outer diameter 22D of the thread coupling section.
The thread starting section 21 is arranged at the left end of the shaft, and the thread starting section 21 is used for screwing the slotted nut 6 in; the slotted nut 6 is screwed onto the threaded coupling section 22, and then the slotted nut 6 is coupled and fixed thereto by a cotter pin ((standard component not shown)), and the threaded coupling section 22 is located near the multi-start threaded section 9.
The outer diameter 21D of the thread starting section is 9 mm; the threaded coupling section outer diameter 22D is 10 mm.
In detail, the thread start section outer diameter 21D is the crest diameter of the thread start section: 9 mm; the external diameter 22D of the threaded coupling section is the crest diameter of the threaded coupling section: 10 mm.
The root diameter of the thread starting section and the root diameter of the thread connecting section are both 8 mm.
The shaft end journal 1 where the thread starting section 21 is located is provided with a mounting hole 10 for inserting a cotter pin.
The major axis further comprises a body section 3, a tooth 4 on the right side of the body section 3 for engagement with a stub shaft gear assembly 8 and a journal section 5 on the left side of the body section 3 for mounting a needle bearing 7, see fig. 4.
Referring to fig. 4, the hand chain wheel K is screwed to the multi-thread section 9 of the long shaft through the transmission thread, the hand chain wheel K serves as a driving member for applying force by a hand, when the chain block descends, the hand chain wheel K is reversed and moves towards the left end of the long shaft, and the slotted nut 6 is used for preventing the hand chain wheel K from being separated from the long shaft, which is combined with fig. 2.
Claims (2)
1. The utility model provides a chain block's major axis tip screw thread improves structure, this major axis has the axle head axle journal at its left end, and the periphery system of axle head axle journal has the screw thread, its characterized in that: the thread consists of a thread starting section and a thread connecting section, and the outer diameter of the thread starting section is 1mm smaller than that of the thread connecting section.
2. The improved structure of the long-axis end thread of the chain block of claim 1, characterized in that: the outer diameter of the thread starting section is 9 mm; the external diameter of the threaded connecting section is 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021424960.8U CN212985785U (en) | 2020-07-13 | 2020-07-13 | Long shaft end part thread improved structure of chain block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021424960.8U CN212985785U (en) | 2020-07-13 | 2020-07-13 | Long shaft end part thread improved structure of chain block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212985785U true CN212985785U (en) | 2021-04-16 |
Family
ID=75428402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021424960.8U Active CN212985785U (en) | 2020-07-13 | 2020-07-13 | Long shaft end part thread improved structure of chain block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212985785U (en) |
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2020
- 2020-07-13 CN CN202021424960.8U patent/CN212985785U/en active Active
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