CN213615480U

CN213615480U - High-precision worm gear and worm pair indexing positioning device

Info

Publication number: CN213615480U
Application number: CN202021572564.XU
Authority: CN
Inventors: 张涛
Original assignee: Wuxi Chuanghao Technology Co ltd
Current assignee: Wuxi Chuanghao Technology Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-07-06
Anticipated expiration: 2030-07-31

Abstract

The utility model provides a high-precision worm gear and worm pair indexing positioning device, which comprises a transmission device and a fixing device, wherein the transmission device is fixedly arranged in the fixing device; the transmission device comprises a worm mechanism and a worm wheel mechanism, wherein a first bearing, a first gear, a second bearing and a first oil seal are sequentially arranged from left to right, the worm mechanism is formed by connecting an input shaft in series, and a second gear, a third bearing and a second oil seal are sequentially arranged from back to front and are formed by connecting an output shaft in series; the first gear of the worm mechanism is meshed with the second gear of the worm gear mechanism, and the worm gear mechanism is positioned right below the worm mechanism; the utility model adopts the mode of direct connection of the worm and the gear, and the shortening of the transmission chain reduces the manufacturing error of each part and the adverse effect of the clearance between the parts on the motion precision; meanwhile, large-size and large-size parts are selected to improve the rigidity of the whole transmission chain and avoid the vibration of the whole transmission chain caused by intermittent cutting.

Description

High-precision worm gear and worm pair indexing positioning device

Technical Field

The utility model relates to an accurate digit control machine tool transmission field especially relates to vice graduation positioner of high accuracy worm gear.

Background

In the worm drive, an appropriate backlash is one of the requirements for the normal operation of the worm gear drive. The normal meshing backlash is a clearance existing between two non-working surfaces in the working process of the worm gear and the worm, is used for compensating thermal deformation, elastic deformation, manufacturing and installation errors and the like generated by transmission, and a certain space is left for a lubricating oil film between tooth surfaces, so that the tooth spaces are not blocked. However, as the worm gear has large relative sliding between the tooth surfaces, the phenomena of abrasion, gluing and the like are inevitably generated when the speed is high and the working condition is not good enough. After the machine is normally used for a period of time, the meshing backlash exceeds the designed value and the transmission precision is reduced due to the abrasion among the tooth surfaces, and even the whole equipment cannot be normally used. The meshing backlash brings idle running to the mechanism during reverse rotation, so that the mechanism cannot be accurately positioned, mechanical impact and vibration are generated, the transmission precision of equipment is reduced, and the part machining error is increased. In a transmission system of a precise numerical control machine tool, a high-precision worm gear and worm pair is always a key technology which is difficult to solve.

Published chinese utility model patent, application No. CN201220055869.2, patent name: high accuracy worm gear pair graduation positioner, application date: 20120221, the utility model discloses a high-precision worm gear and worm gear indexing positioning device applied to a numerical control rotary table of an indexable blade peripheral grinding machine, when the worm gear pair is meshed, two worm gears are meshed with a worm gear at the same time, and the two worm gears are coaxially installed; the clearance between the end faces of the two worms is adjusted, so that the positive and negative rotation clearances of the worm-gear pair are eliminated or reduced. After the turntable reaches a certain angle, pressure oil is injected into the sealing oil cavity through the flange sleeve, along with the increase of oil pressure, the piston pushes the elastic braking ring to elastically deform, the gasket is compressed to increase the friction force of the end face of the gasket to lock the worm wheel, the meshing precision of the worm wheel and the tooth surface of the worm is ensured, and therefore the positioning precision and the rotation precision of the turntable are ensured. The utility model discloses can popularize and use in high-grade digit control machine tool trade to the higher rotary motion mechanism of gyration precision and positioning accuracy requirement, also can regard as independent accurate graduation location functional part, can satisfy rotary motion mechanism's high accuracy degree location requirement.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects of the prior art, the utility model provides a high-precision worm gear pair indexing positioning device, which comprises a transmission device and a fixing device, wherein the transmission device is fixedly arranged inside the fixing device;

the transmission device comprises a worm mechanism and a worm wheel mechanism,

a first bearing 1, a first gear 2, a second bearing 3 and a first oil seal 4 are sequentially arranged from left to right, a worm mechanism is formed by connecting an input shaft 5 in series,

a second gear 6, a third bearing 7 and a second oil seal 8 are sequentially arranged from back to front and are connected in series through an output shaft 9 to form a worm gear mechanism;

the first gear 2 of the worm mechanism and the second gear 6 of the worm gear mechanism are meshed with each other, and the worm gear mechanism is positioned right below the worm mechanism.

Preferably, the fixing device comprises a box body 10, an aerator 11, a clamping seat 12, a small end cover 13, a large end cover 14 and a foot seat 15, wherein the box body 10 is hollow, the aerator 11 is fixedly installed on the upper surface of the box body 10, the clamping seat 12 is fixedly installed on the inner side wall of the box body 10 and is used for fixedly installing the first bearing 1, the small end cover 13 is fixedly installed on the outer side wall of the box body 10 and is used for disassembling and installing the worm mechanism, the large end cover 14 is fixedly installed on the outer side wall of the box body 10 and is used for disassembling and installing the worm mechanism, and the foot seat 15 is provided with a pair.

Preferably, the outer side wall of the box body 10 is provided with an oil drainage bolt 16 which is positioned at the lower end of the large end cover 14.

Preferably, the four corners of the large end cover 14 and the small end cover 13 are provided with hexagon screws 17.

Preferably, the input shaft 5 and the output shaft 9 are provided with a raised key slot 18 through the side wall of the exposed portion of the housing 10.

Preferably, the worm wheel 6 is made of cast tin bronze.

Preferably, the cartridge 12 is axially clamped.

The utility model has the advantages that: the worm and gear direct connection mode is adopted, and the transmission chain is shortened, so that the manufacturing errors of all parts are reduced, and the adverse effect of gaps among the parts on the movement precision is reduced; meanwhile, large-size and large-size parts are selected to improve the rigidity of the whole transmission chain and avoid the vibration of the whole transmission chain caused by intermittent cutting.

Drawings

Fig. 1 is a schematic view of a partial structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

in the figure, the position of the upper end of the main shaft,

1. a first bearing; 2. a first gear; 3. a second bearing; 4. a first oil seal; 5. an input shaft; 6. a second gear; 7. a third bearing; 8. a second oil seal; 9. an output shaft; 10. a box body; 11. an aerator; 12. a card holder; 13. a small end cap; 14. a large end cap; 15. a foot seat; 16. An oil drain bolt; 17. a hex screw; 18. a raised keyway.

Detailed Description

In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.

As shown in fig. 1-2, the present invention comprises: the transmission device is fixedly arranged in the fixing device;

the transmission device comprises a worm mechanism and a worm wheel mechanism,

Preferably, the fixing device comprises a box body 10, an aerator 11, a clamping seat 12, a small end cover 13, a large end cover 14 and a foot seat 15, wherein the box body 10 is hollow, the aerator 11 is fixedly installed on the upper surface of the box body 10, the clamping seat 12 is fixedly installed on the inner side wall of the box body 10 and is used for fixedly installing the first bearing 1, the small end cover 13 is fixedly installed on the outer side wall of the box body 10 and is used for disassembling and installing the worm mechanism, the large end cover 14 is fixedly installed on the outer side wall of the box body 10 and is used for disassembling and installing the worm mechanism, and the foot seat 15 is provided with a pair of pairs and is.

By the arrangement of the structure, the complete fixing device is combined, and the accuracy of the installation position of the transmission device is ensured.

In the present embodiment, it is preferable that the outer side wall of the case 10 is provided with an oil drain bolt 16 at the lower end of the large end cover 14.

The structure is arranged, and the device is mainly used for discharging dirty oil and cleaning agents during lubricating oil replacement.

In the embodiment, the four corners of the large end cover 14 and the small end cover 13 are provided with hexagonal screws 17.

By adopting the structure, the end cover fixes the axial position of the shaft fastening component and bears axial load, and the hexagon screw is used for locking and unlocking the end cover.

In this embodiment, it is preferred that the input shaft 5 and the output shaft 9 are provided with a raised key slot 18 through the side wall of the exposed portion of the housing 10.

By the arrangement of the structure, the key slot is mainly reserved for key connection to place flat keys, and the connection of the shaft and the gear on the shaft can be completed through the keys.

In the present embodiment, the second gear 6 is preferably made of cast tin bronze.

By adopting the structure, the cast tin bronze has the advantages of high strength, high compactness, good wear resistance and stable chemical performance.

In the present embodiment, the clamping seat 12 is preferably axially clamped.

By the arrangement of the structure, the phenomenon that the indexing precision is damaged due to the fact that the position of the circle center of the workbench is changed by using radial clamping force is avoided.

In the use process, the clamping seat adopts an axial clamping mode, so that the phenomenon that the indexing precision is damaged due to the fact that the position of the circle center of the workbench is changed by using radial clamping force is avoided; the worm and gear direct connection mode is adopted, and the transmission chain is shortened, so that the manufacturing errors of all parts are reduced, and the adverse effect of gaps among the parts on the movement precision is reduced; meanwhile, large-size and large-size parts are selected to improve the rigidity of the whole transmission chain and avoid the vibration of the whole transmission chain caused by intermittent cutting.

The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of this patent application.

Claims

1. The high-precision worm and gear pair indexing positioning device is characterized by comprising a transmission device and a fixing device, wherein the transmission device is fixedly arranged in the fixing device;

the transmission device comprises a worm mechanism and a worm wheel mechanism,

a first bearing (1), a first gear (2), a second bearing (3) and a first oil seal (4) are sequentially arranged from left to right, a worm mechanism is formed by connecting an input shaft (5) in series,

a second gear (6), a third bearing (7) and a second oil seal (8) are sequentially arranged from back to front, and are connected in series through an output shaft (9) to form a worm gear mechanism;

the first gear (2) of the worm mechanism and the second gear (6) of the worm gear mechanism are meshed with each other, and the worm gear mechanism is located right below the worm mechanism.

2. The high precision worm-and-gear pair indexing positioning device of claim 1, wherein: the fixing device comprises a box body (10), an aerator (11), a clamping seat (12), a small end cover (13), a large end cover (14) and a foot seat (15), wherein the box body (10) is hollow, the aerator (11) is fixedly installed on the upper surface of the box body (10), the clamping seat (12) is fixedly installed on the inner side wall of the box body (10) and is used for fixedly installing a first bearing (1), the small end cover (13) is fixedly installed on the outer side wall of the box body (10) and is used for disassembling and installing a worm mechanism, the large end cover (14) is fixedly installed on the outer side wall of the box body (10) and is used for disassembling and installing a worm gear mechanism, and the foot seat (15) is provided with a pair of symmetrical.

3. The high precision worm-and-gear pair indexing positioning device of claim 2, wherein: the outer side wall of the box body (10) is provided with an oil drainage bolt (16) which is positioned at the lower end of the large end cover (14).

4. The high precision worm-and-gear pair indexing positioning device of claim 2, wherein: and hexagonal screws (17) are arranged at the four corners of the large end cover (14) and the small end cover (13).

5. The high precision worm-and-gear pair indexing positioning device of claim 1, wherein: and the side walls of the exposed parts of the input shaft (5) and the output shaft (9) penetrating through the box body (10) are provided with raised key grooves (18).

6. The high precision worm-and-gear pair indexing positioning device of claim 1, wherein: the second gear (6) is made of cast tin bronze.

7. The high precision worm-and-gear pair indexing positioning device of claim 2, wherein: the clamping seat (12) adopts an axial clamping mode.