CN110939716A

CN110939716A - Gear fixing precision mechanism

Info

Publication number: CN110939716A
Application number: CN201911382566.4A
Authority: CN
Inventors: 周艺龙; 吴礼剑; 王伟; 霍振普; 吴建亭; 黄学敏; 唐严清; 朱涛; 叶金华; 陈华锦
Original assignee: Zhongminggu Intelligent Robot Guangdong Co Ltd
Current assignee: Zhongminggu Intelligent Robot Guangdong Co Ltd
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-03-31

Abstract

The invention relates to the technical field of gear transmission, in particular to a precision mechanism for fixing a gear, which comprises a mounting base, wherein a bearing assembly is arranged in the mounting base, a gear is arranged at one end of the mounting base, a rotating shaft which penetrates through the bearing assembly and is connected with the gear is arranged at the other end of the mounting base, a fixing nut is arranged outside the bearing assembly, a special screw is connected between the rotating shaft and the gear, and an assembling hole which is connected with the special screw in a matching manner is arranged on the end surface of the rotating shaft. The invention realizes no axial looseness among the gear, the rotating shaft and the bearing assembly, effectively reduces the shaft bounce in the running process of the rotating shaft gear mechanism, and improves the service life and the transmission accuracy of the gear.

Description

Gear fixing precision mechanism

Technical Field

The invention relates to the technical field of gear transmission, in particular to a precision mechanism for fixing a gear.

Background

The traditional rotating shaft gear mechanism has the advantages that shaft jumping occurs in the operation process, connection is not firm, noise and unnecessary vibration are easily generated in the gear operation process, the gear is damaged, particularly when the gear is used for a long time and is seriously abraded, the noise and the vibration are stronger, the working requirement of accurate transmission cannot be met, the service life is shortened, and the working efficiency and the working precision are greatly influenced.

Disclosure of Invention

The invention aims to provide a precision mechanism for fixing a gear, aiming at the defects of the prior art, so that no axial looseness among the gear, a rotating shaft and a bearing assembly is realized, shaft jumping in the running process of the rotating shaft gear mechanism is effectively reduced, the service life of the gear is prolonged, and the transmission precision is improved.

In order to achieve the purpose, the precision mechanism for fixing the gear comprises a mounting base, wherein a bearing assembly is arranged in the mounting base, a gear is arranged at one end of the mounting base, a rotating shaft which penetrates through the bearing assembly and is connected with the gear is arranged at the other end of the mounting base, a fixing nut is arranged outside the bearing assembly, a special screw is connected between the rotating shaft and the gear, and an assembling hole which is connected with the special screw in a matched mode is formed in the end face of the rotating shaft.

Preferably, the bearing assembly comprises a bearing and a bearing cover plate, the outer ring of the bearing is fixedly arranged on the mounting base, the inner ring of the bearing is rotatably connected with the rotating shaft, a plurality of mounting holes are uniformly formed in the periphery of the bearing cover plate, and the mounting holes are connected with mounting screws.

Preferably, an elastic washer is arranged between the bearing and the bearing cover plate.

Preferably, the rotation axis includes cylindrical main part, the both ends of cylindrical main part are provided with first end and second end respectively, the lateral wall of first end is provided with the mounting groove, first end passes through mounting groove and gear connection, the junction between first end and the cylindrical main part is provided with outside convex shaft shoulder, the second end is provided with the parallel key.

Preferably, the flat key is a round-head flat key.

Preferably, the gear is a helical gear.

The invention has the beneficial effects that: the precision mechanism for fixing the gear comprises a mounting base, wherein a bearing assembly is arranged in the mounting base, a gear is arranged at one end of the mounting base, a rotating shaft which penetrates through the bearing assembly and is connected with the gear is arranged at the other end of the mounting base, a fixing nut is arranged outside the bearing assembly, a special screw is connected between the rotating shaft and the gear, and an assembling hole which is connected with the special screw in a matched mode is formed in the end face of the rotating shaft.

The gear is connected with the rotating shaft through a special screw to realize the axial fixation of the gear and the rotating shaft; the rotating shaft is mutually matched and connected through a shaft shoulder, an elastic washer and a fixing nut so as to realize that a bearing inner ring of the bearing assembly is axially fixed with the rotating shaft; the bearing inner race and the outer race are arranged integrally, the bearing outer race is connected with the mounting base in an axial direction through a circular groove in the mounting base, a bearing cover plate and mounting screws in a matched mode, the mounting base is axially fixed on an external mounting plate through the positioning assembly, and finally the precise axial fixing of the gear is achieved on the external mounting plate. The invention realizes no axial looseness among the gear, the rotating shaft and the bearing assembly, effectively reduces the shaft bounce in the running process of the rotating shaft gear mechanism, and improves the service life and the transmission accuracy of the gear.

Drawings

Fig. 1 is a schematic sectional view of the inside of the present invention.

Fig. 2 is an exploded view of the present invention.

The reference numerals include:

1-mounting base

2-bearing assembly 21-bearing 22-bearing cover plate

23-mounting hole 24-mounting screw

3-Gear

4-rotating shaft 40-cylindrical body 41-first end

42-second end 43-mounting groove 44-shaft shoulder

45-flat key

5-fixing nut 6-elastic washer 7-special screw

And 8, assembling holes.

Detailed Description

The present invention is described in detail below with reference to the attached drawings.

As shown in fig. 1 to 2, the precision mechanism for fixing a gear according to the present invention includes a mounting base 1, a bearing assembly 2 is disposed in the mounting base 1, a gear 3 is disposed at one end of the mounting base 1, a rotating shaft 4 penetrating through the bearing assembly 2 and connected to the gear 3 is disposed at the other end of the mounting base 1, a fixing nut 5 is disposed outside the bearing assembly 2, a special screw 7 is connected between the rotating shaft 4 and the gear 3, and an assembly hole 8 in matching connection with the special screw 7 is disposed on an end surface of the rotating shaft 4.

The gear 3 is connected with the rotating shaft 4 through a special screw 7 so as to realize the axial fixation of the gear 3 and the rotating shaft 4; the rotating shaft 4 is mutually matched and connected through a shaft shoulder 44, an elastic washer 6 and a fixing nut 5 so as to realize the axial fixation of the inner ring of the bearing 21 of the bearing assembly 2 and the rotating shaft 4; the bearing 21 inner ring and the outer ring are arranged integrally, the bearing 21 outer ring is connected with the mounting base 1 in an axial direction through a circular groove in the mounting base 1, a bearing cover plate 22 and a mounting screw 24 in a matching mode, the mounting base 1 is axially fixed on an external mounting plate through a positioning assembly, and finally, the gear 3 is precisely axially fixed on the external mounting plate. The invention realizes no axial looseness among the gear 3, the rotating shaft 4 and the bearing assembly 2, effectively reduces shaft jumping in the running process of the rotating shaft 4 and the gear 3 mechanism, and improves the service life and the transmission accuracy of the gear 3.

As shown in fig. 1 and 2, the bearing assembly 2 of the present embodiment includes a bearing 21 and a bearing cover plate 22, an outer ring of the bearing 21 is fixedly disposed on the mounting base 1, an inner ring of the bearing 21 is rotatably connected to the rotating shaft 4, a plurality of mounting holes 23 are uniformly disposed on an outer periphery of the bearing cover plate 22, and the mounting holes 23 are connected to mounting screws 24. Specifically, each set of bearings 21 is provided with one or more sets of rolling elements, which are mounted between the inner ring and the outer ring to function as a rolling transmission force. The inner ring, also called an inner sleeve or an inner ring, is usually fixed on a shaft neck, the inner ring rotates together with the rotating shaft 4, the outer ring, also called an outer sleeve or an outer ring, is usually fixed on a shell or a mounting base 1 of a machine and plays a role of supporting a rolling body, grooves for the rolling body to roll are formed in the outer surface of the inner ring and the inner surface of the outer ring, the load bearing capacity of the bearing 21 is improved, a plurality of mounting screws 24 are correspondingly inserted into a plurality of mounting holes 23 of a bearing cover plate 22 to be connected with the mounting base 1, the bearing 21 is fixedly mounted in the mounting base 1 through the bearing cover plate 22, the outer ring of the bearing 21 is fixed on the mounting base 1 through the mounting base 1 and the bearing cover plate 22, no axial looseness of the outer ring.

As shown in fig. 1 and 2, an elastic washer 6 is provided between the bearing 21 and the bearing cover plate 22 in the present embodiment. Specifically, the elastic washer 6 is arranged at the side of the fixing nut 5 to effectively prevent the fixing nut 5 from loosening and falling off, and the elastic washer is simple in structure, good in elasticity, firm in connection and good in reliability.

As shown in fig. 1 and 2, the rotating shaft 4 of the present embodiment includes a cylindrical main body 40, a first end 41 and a second end 42 are respectively disposed at two ends of the cylindrical main body 40, an outer side wall of the first end 41 is provided with a mounting groove 43, the first end 41 is connected to the gear 3 through the mounting groove 43, a connecting portion between the first end 41 and the cylindrical main body 40 is provided with a shoulder 44 protruding outward, and the second end 42 is provided with a flat key 45. Specifically, the cylindrical main body 40 and the first end 41 and the second end 42 are manufactured through an integral forming process, the structure is compact, the stability is good, the external connecting piece is inserted into the installation groove 43 and then connected with the gear 3, the fixing nut 5 is screwed to press the elastic washer 6 to drive the inner ring of the bearing 21 to abut against the shaft shoulder 44, the rotating shaft 4 is ensured not to slide on the inner ring of the bearing 21, the purpose of axial zero movement is achieved, the gear 3 and the rotating shaft 4 are fixed into a whole through the combined action of the special screw 7, the installation groove 43 and the fixing nut 5, and the gear 3 cannot be loosened relative to the rotating shaft 4.

As shown in fig. 2, the flat key 45 of the present embodiment is a round-headed flat key 45. Specifically, the round-head flat key 45 is suitable for installation and has a stable structure and good centering performance, and the round-head flat key 45 has good axial installation and fixation capacity in the groove.

As shown in fig. 1 and 2, the gear 3 of the present embodiment is a helical gear 3. Specifically, the common straight gear simultaneously enters into meshing along the tooth width, so impact vibration noise is generated, the transmission is not stable, the transmission of the helical gear 3 is better than a straight gear type, the center distance can be tightened for high-speed heavy load, the transmission torque is large, the starting is stable, the transmission accuracy is high, and the random installation connection and the selection of various installation positions can be carried out according to the processing requirement.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. The utility model provides a fixed precision mechanism of gear which characterized in that: the mounting structure comprises a mounting base, wherein a bearing assembly is arranged in the mounting base, a gear is arranged at one end of the mounting base, a rotating shaft which penetrates through the bearing assembly and is connected with the gear is arranged at the other end of the mounting base, a fixing nut is arranged outside the bearing assembly, a special screw is connected between the rotating shaft and the gear, and an assembling hole which is connected with the special screw in a matched mode is formed in the end face of the rotating shaft.

2. A gear fixing precision mechanism according to claim 1, wherein: the bearing assembly comprises a bearing and a bearing cover plate, the outer ring of the bearing is fixedly arranged on the mounting base, the inner ring of the bearing is rotatably connected with the rotating shaft, a plurality of mounting holes are uniformly formed in the periphery of the bearing cover plate, and the mounting holes are connected with mounting screws.

3. A gear fixing precision mechanism according to claim 2, wherein: and an elastic gasket is arranged between the bearing and the bearing cover plate.

4. A gear fixing precision mechanism according to claim 1, wherein: the rotation axis includes cylindrical main part, the both ends of cylindrical main part are provided with first end and second end respectively, the lateral wall of first end is provided with the mounting groove, first end passes through mounting groove and gear connection, the junction between first end and the cylindrical main part is provided with outside convex shaft shoulder, the second end is provided with the parallel key.

5. A gear fixing precision mechanism according to claim 4, characterized in that: the flat key is a round-head flat key.

6. A gear fixing precision mechanism according to claim 1, wherein: the gear is a helical gear.