CN212095436U - Tool changing unloading structure of electric spindle - Google Patents
Tool changing unloading structure of electric spindle Download PDFInfo
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- CN212095436U CN212095436U CN202020802345.XU CN202020802345U CN212095436U CN 212095436 U CN212095436 U CN 212095436U CN 202020802345 U CN202020802345 U CN 202020802345U CN 212095436 U CN212095436 U CN 212095436U
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- tool changing
- unloading
- electric spindle
- claw
- pull rod
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Abstract
The utility model discloses a tool changing off-load structure of electricity main shaft, this electricity main shaft include axle core and pull rod, axle core overcoat is equipped with the bearing group, tool changing off-load structure include casing, sliding connection in promote in the casing the tool changing push rod of pull rod, be fixed in be used for on the casing taut the off-load petal claw of axle core, be equipped with the injection pressure chamber in the casing, when producing pressure in the injection pressure chamber the pressurized action point of off-load petal claw and tool changing push rod is located respectively the both sides in injection pressure chamber. The utility model discloses can be to trading sword push rod and off-load claw application of force and opposite direction simultaneously after the injection is pressed in the injection pressure chamber, off-load claw can hold the axle core tightly when the tool changing push rod promotes the pull rod antedisplacement promptly to having unloaded most pull rods and having passed through the axial force of axle core transmission to the bearing, having played the good protection to the bearing, be favorable to promoting the life of electricity main shaft.
Description
Technical Field
The utility model relates to a high-speed combined machining technical field of intelligence especially relates to a tool changing off-load structure of electricity main shaft.
Background
The electric main shaft is a new technology which integrates a machine tool main shaft and a main shaft motor into a whole and appears in the field of numerical control machine tools, and the electric main shaft, together with a linear motor technology and a high-speed cutter technology, pushes a high-speed machining technology to a new era. Specifically, the electric spindle is a set of components, which generally includes the electric spindle itself and its accessories, mainly including: the device comprises an electric main shaft, a high-frequency conversion device, an oil mist lubricator, a cooling device, a built-in encoder, a tool changing device and the like. The transmission structure form of the spindle motor and the machine tool spindle which are combined into a whole enables the spindle part to be relatively independent from a transmission system and an integral structure of the machine tool, so that the spindle unit can be made, and the traditional transmission structure utilizing a transmission belt is replaced, so that the rotating speed of the spindle is greatly improved, and the spindle motor is more and more popular in the market today.
The applicant is dedicated to research and development work of the high-speed electric spindle, for example, a high-speed electric spindle is described in a chinese patent document with an application number of 201820319554.1 and a patent name of "a high-speed ball bearing electric spindle", and mainly comprises a cylinder assembly, a cylinder block assembly, a rear bearing block assembly, a body assembly, a front bearing block assembly, a rotor assembly, a front bearing pressing plate assembly and a broach mechanism, and the motor is internally provided with a structure, has the characteristics of compact structure, light weight, small inertia, small vibration, low noise and the like, and can realize high rotating speed, high precision and high operation stability.
However, with the development of industry upgrading and technology, the direction of technology development is not only how to realize high-speed rotation, but also more people put eyes on the tool changing mode of the machining center, because the tool changing manipulator is a key functional component for stable and reliable operation of the machining center. The quick and accurate tool changing program is an important factor influencing the high-efficiency and reliable machining performance of the machining center. Without a tool changing robot, a machining center with centralized processes for machining is impossible.
At present, a manipulator tool changing mode is mostly adopted for an automatic tool changer, the manipulator tool changing device is flexible in configuration of a tool magazine, relative position of the manipulator tool changing device and a main shaft and tool number determination, the manipulator tool changing number and the tool changing mode are random, tool changing time is short, application is wide, tool changing time of BT40 abroad reaches 0.9 second, tool changing time of BT50 reaches about 1.5 seconds, and vertical and horizontal dual-purpose cam type tool changing manipulators and five-axis linkage tool changing manipulators are researched domestically. Correspondingly, whether the tool changing mechanism in the electric spindle can keep pace with the development of tool changing of the manipulator is also an important problem.
Also disclosed a high-speed electricity main shaft in another application number 201721064815.1, the chinese patent of patent name "a high-speed compound carving mills center and goes out pneumatic tool changing electricity main shaft", including the organism, be located rotation axis subassembly, stator module, pretension mechanism in the organism and being located the front bearing and the rear bearing at rotation axis subassembly both ends still including being located tool changing mechanism in the rotation axis subassembly, being located connector on the organism rear end, with cylinder subassembly, center that the connector is connected go out water mechanism and sealing mechanism, and it adopts cylinder and tool changing mechanism to cooperate, realizes snatching and loosening the handle of a knife, and the whole process of tool changing is accomplished to the cooperation manipulator.
In the tool changing process of the scheme, the operation is that "0.6 MPa of compressed air is injected into the tool unloading air inlet T0 to push the front piston 24 to move forward so as to compress the disc spring assembly 14 and the pulling claw 9 moves forward and opens automatically for tool changing",
but when claw and pull rod antedisplacement are drawn in the drive, the pull rod must produce great axial effort (7000N ~ 10000N) to the axle core, and this effort is shared by the bearing of cover establishing at the outside both ends of axle core, causes the inside ball of bearing to roll off easily and breaks away from, and in case there is vibration or deviation in the conduction process of power, all can produce very big impact to the bearing, causes the damage of bearing.
SUMMERY OF THE UTILITY MODEL
In order to solve the defect that causes the bearing damage among the above-mentioned prior art easily, the utility model provides a tool changing off-load structure of electricity main shaft.
The utility model discloses a technical scheme be, a tool changing off-load structure of electricity main shaft, electricity main shaft includes axle core and pull rod, the axle core overcoat is equipped with the bearing group, a serial communication port, tool changing off-load structure include casing, sliding connection in the casing and promote the tool changing push rod of pull rod, be fixed in be used for on the casing taut the off-load petal claw of axle core, be equipped with the injection pressure chamber in the casing, when producing pressure in the injection pressure chamber the pressurized action point of off-load petal claw and tool changing push rod is located respectively the both sides in injection pressure chamber.
Preferably, the shell comprises a front cover, a rear cover and a shell fixedly connected with the electric spindle, the front cover, the tool changing push rod and the rear cover are all connected in the shell in a sliding mode, and a space formed by enclosing the tool changing push rod, the shell and the rear cover is an injection pressure cavity.
Preferably, the rear cover is provided with a tool changing oil inlet and a broach oil inlet, a cavity enclosed by one end of the shell close to the pull rod and the tool changing push rod is a pressure relief cavity, the tool changing oil inlet is communicated with the injection pressure cavity, and the broach oil inlet is communicated with the pressure relief cavity.
Preferably, the front cover is fixedly connected with the rear cover, and the front cover is buckled on the unloading claw.
Preferably, a shaft core unloading ring is fixed on the shaft core, one end of each unloading claw is buckled on the front cover, and the other end of each unloading claw is buckled on the shaft core unloading ring.
Preferably, at least one abutting end extends to the outside of the electric spindle on the shaft core unloading ring, one end of the front cover, which is close to the shaft core unloading ring, also extends to the outside of the electric spindle to form one abutting end, at least two buckling ends extending to the inside of the electric spindle are arranged on the unloading claw, the two buckling ends can be abutted to the two abutting ends, which are close to the shaft core unloading ring and the front cover, respectively, and the minimum distance between the two buckling ends is greater than or equal to the maximum distance between the two abutting ends.
Preferably, the shaft core unloading ring is sleeved on the pull rod, and the shaft core unloading ring is fastened and fixed with the end part of the shaft core.
Preferably, the medium for generating pressure in the injection cavity is hydraulic oil/pressure gas.
Preferably, the pull rod is sleeved with a reset elastic piece which enables the pull rod to have a trend of moving towards the direction close to the tool changing unloading structure.
Preferably, the stroke of the unloading claw is smaller than the deformation of the return elastic part, and the return elastic part is a belleville spring set/a rectangular spring set/a double-spiral spring set.
Compared with the prior art, the utility model discloses following beneficial effect will have:
1. the unloading claw unloads most of axial acting force borne by the bearing and transfers the axial acting force to the front cover, so that the bearing is greatly protected, and the service lives of the bearing and the electric main shaft are prolonged;
2. because the elastic reset piece is sleeved on the pull rod, when pressure is generated in the pressure injection cavity, the elastic reset piece is firstly compressed and the front cover is synchronously pushed to retreat, namely, the pull rod cannot be pushed to advance immediately, the bearing does not receive axial acting force from the pull rod at the moment, and the front cover already tensions the shaft core when the pull rod starts to advance, so that the axial acting force of the pull rod on the bearing is transferred and removed in time, and the service life of the bearing is further prolonged by combining the elastic reset piece and the pull rod;
3. the acting forces of the unloading claw and the pull rod are from the same pressure source in the injection cavity, so that the unloading claw and the pull rod are equal in size and have no difference, the acting forces of the unloading claw and the pull rod can be well matched, and the axial acting force of the pull rod on the shaft core can be completely unloaded as far as possible.
Drawings
The invention is explained in more detail below with reference to exemplary embodiments and the accompanying drawings, in which:
fig. 1 is a schematic sectional view of the tool changing unloading structure of the embodiment.
6. Unloading the claw; 11. a shaft core unloading ring; 14. a tool changing push rod; 15. a front cover; 16. a pull rod; 17. a housing; 19. a rear cover; 20. a shaft core; 24. a belleville spring set; 25. a tool changing oil inlet; 26. a broach oil inlet; 27. a butting end; 28. and (6) buckling the ends.
Detailed Description
A tool changing unloading structure of an electric spindle is shown in figure 1, the electric spindle comprises a pull rod 16 and a spindle core 20 coated on the pull rod 16, a bearing set is sleeved outside the spindle core and comprises a front end bearing and a rear end bearing, one end of the pull rod 16 is connected with a pull claw, a tool handle and the like, and the other end of the pull rod is connected with the tool changing unloading structure.
The tool changing unloading structure comprises a shell, a tool changing push rod 14 and an unloading claw 6, wherein the tool changing push rod 14 is connected in the shell in a sliding mode and pushes a pull rod 16, the unloading claw 6 is fixed on the shell and used for tensioning a shaft core 20, a pressure injection cavity is formed in the shell, and pressure action points of the unloading claw 6 and the tool changing push rod 14 are respectively located on two sides of the pressure injection cavity when pressure is generated in the pressure injection cavity. The medium for generating pressure in the pressure injection cavity is hydraulic oil/pressure gas, in this embodiment, hydraulic oil is taken as an example, the tool changing unloading structure is mainly based on the oil cylinder and accessories thereof, and similarly, if pressure gas is taken as a pressure medium, the tool changing unloading structure is mainly based on the air cylinder and accessories thereof.
Specifically, the shell comprises a front cover 15, a rear cover 19 and a shell 17 fixedly connected with the electric spindle, the front cover 15, the tool changing push rod 14 and the rear cover 19 are all connected in the shell 17 in a sliding mode, the front cover 15 and the rear cover 19 are fixedly connected through bolts, and the front cover 15 is buckled on the unloading claw 6. The space that tool changing push rod 14, shell 17 and back lid 19 enclose to establish and form is promptly for annotating the pressure chamber, and the cavity that shell 17 is close to 16 one ends of pull rod and tool changing push rod 14 encloses is for releasing the pressure chamber, has seted up tool changing oil inlet 25 and broach oil inlet 26 on the back lid 19, and tool changing oil inlet 25 and notes pressure chamber intercommunication, broach oil inlet 26 and release the pressure chamber intercommunication.
When hydraulic oil is injected through the tool changing oil inlet 25, pressure generated by the hydraulic oil pushes the tool changing push rod 14 and the rear cover 19 to move simultaneously, when the tool changing push rod 14 moves forwards, the pressure is transmitted to the pull rod 16, the rear cover 19 retreats and drives the front cover 15 to retreat synchronously, so that the front cover 15 transmits tension to the unloading claw 6, and the unloading claw 6 tensions the shaft core 20, namely the shaft core 20 is in a tensioned state. On the contrary, when hydraulic oil is injected through the broach oil inlet 26, the broach oil inlet 25 is opened and the hydraulic oil in the injection cavity is discharged in time, at this time, the hydraulic oil in the pressure relief cavity pushes the broach push rod 14 to retreat and reset, the rear cover 19 losing the function of the hydraulic oil also drives the front cover 15 to reset under the action of the spring, and therefore the unloading claw 6 relieves the tensioning effect on the shaft core 20.
One end of the shaft core 20 close to the oil cylinder is fixedly buckled with a shaft core 20 unloading ring 11, the shaft core 20 unloading ring 11 is sleeved on the pull rod 16, one end of the unloading claw 6 is buckled on the front cover 15, and the other end of the unloading claw is buckled on the shaft core 20 unloading ring 11, so that the stress transmission of the front cover 15 and the shaft core 20 is realized. The unloading ring 11 of the shaft core 20 is provided with an abutting end 27 extending towards the outside of the electric spindle, one end of the front cover 15 close to the unloading ring 11 of the shaft core 20 also extends towards the outside of the electric spindle to form an abutting end 27, the unloading claw 6 is provided with two buckling ends 28 extending towards the inside of the electric spindle, the two buckling ends 28 can be abutted against the two abutting ends 27 close to the unloading ring 11 of the shaft core 20 and the front cover 15 respectively, and the minimum distance between the two buckling ends 28 is greater than the maximum distance between the two abutting ends 27. The unloading ring 11 of the shaft core 20 and the abutting end 27 on the front cover 15 may be a complete circle, or may be a plurality of pairs symmetrically arranged along the radial center of the electric spindle, and the buckling end 28 on the unloading claw 6 and the abutting end 27 may be correspondingly arranged.
The pull rod 16 is sleeved with a return elastic element which enables the pull rod 16 to have a tendency of moving towards the direction close to the tool changing unloading structure, because the minimum distance between the two buckling ends 28 is larger than the maximum distance between the two abutting ends 27, the unloading claw 6 has a certain stroke, the stroke of the unloading claw 6 is smaller than the deformation amount of the return elastic element, the return elastic element is a belleville spring group 24/a rectangular spring group/a double-spiral spring group, and the belleville spring group 24 is taken as an example in the embodiment. Because the butterfly spring group 24 is sleeved on the pull rod 16, when pressure is generated in the injection pressure cavity, the butterfly spring group 24 is firstly compressed and the front cover 15 is synchronously pushed to retreat, namely the pull rod 16 is not pushed to advance immediately, the bearing is not subjected to axial acting force from the pull rod 16 at the moment, and the front cover 15 strains the shaft core 20 when the pull rod 16 starts to advance, so that the axial acting force of the pull rod 16 to the bearing is transferred and removed in time, and the service life of the bearing is prolonged.
An inductor frame is further installed in the rear cover 19, the inner wall of the rear cover 19 is full threads, the outer circle of the inductor frame is also full threads, the inductor frame can be fixed through the threads, the axial distance of the inductor frame can be adjusted, an inductor is installed in the inductor frame, the states of 'tool loosening' and 'tool pulling' can be accurately controlled, and therefore the electric spindle is effectively protected from working normally.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a tool changing unloading structure of electricity main shaft, electricity main shaft includes axle core and pull rod, the axle core overcoat is equipped with the bearing group, a serial communication port, tool changing unloading structure include casing, sliding connection in promote in the casing the tool changing push rod of pull rod, be fixed in be used for tautly on the casing the unloading claw of axle core, be equipped with the injection pressure chamber in the casing, when producing pressure in the injection pressure chamber the pressurized action point of unloading claw and tool changing push rod is located respectively the both sides in injection pressure chamber.
2. The tool changing and unloading structure of the electric spindle according to claim 1, wherein the housing comprises a front cover, a rear cover and a housing fixedly connected with the electric spindle, the front cover, the tool changing push rod and the rear cover are all slidably connected in the housing, and a space defined by the tool changing push rod, the housing and the rear cover is an injection pressure chamber.
3. The tool changing unloading structure of the electric spindle according to claim 2, wherein a tool changing oil inlet and a broach oil inlet are formed in the rear cover, a cavity defined by one end of the shell close to the pull rod and the tool changing push rod is a pressure relief cavity, the tool changing oil inlet is communicated with the pressure injection cavity, and the broach oil inlet is communicated with the pressure relief cavity.
4. The tool changing and unloading structure of an electric spindle according to claim 2, wherein the front cover is fixedly connected with the rear cover, and the front cover is buckled on the unloading claw.
5. The tool changing and unloading structure of an electric spindle according to claim 4, wherein a spindle unloading ring is fixed on the spindle, one end of the unloading claw is fastened on the front cover, and the other end of the unloading claw is fastened on the spindle unloading ring.
6. The tool changing and unloading structure of an electric spindle according to claim 5, wherein the shaft unloading ring has at least one abutting end extending to the outside of the electric spindle, the end of the front cover close to the shaft unloading ring also has an abutting end extending to the outside of the electric spindle, the unloading claw is provided with at least two fastening ends extending to the inside of the electric spindle, the two fastening ends can be abutted to the two abutting ends of the shaft unloading ring and the front cover close to each other, and the minimum distance between the two fastening ends is greater than or equal to the maximum distance between the two abutting ends.
7. The tool changing unloading structure of an electric spindle according to claim 5, wherein the shaft core unloading ring is sleeved on the pull rod, and the shaft core unloading ring is fastened and fixed with the end of the shaft core.
8. The tool changing and unloading structure of an electric spindle according to any one of claims 1 to 7, wherein a medium for generating pressure in the pressure injection cavity is hydraulic oil/pressure gas.
9. The tool changing and unloading structure of an electric spindle according to any one of claims 1 to 7, wherein a return elastic member is sleeved on the pull rod to make the pull rod have a tendency to move towards the tool changing and unloading structure.
10. The tool changing and unloading structure of an electric spindle according to claim 9, wherein the stroke of the unloading claw is smaller than the deformation amount of the return elastic member, and the return elastic member is a belleville spring set/a rectangular spring set/a double-spiral spring set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020802345.XU CN212095436U (en) | 2020-05-14 | 2020-05-14 | Tool changing unloading structure of electric spindle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020802345.XU CN212095436U (en) | 2020-05-14 | 2020-05-14 | Tool changing unloading structure of electric spindle |
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| CN212095436U true CN212095436U (en) | 2020-12-08 |
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| CN202020802345.XU Active CN212095436U (en) | 2020-05-14 | 2020-05-14 | Tool changing unloading structure of electric spindle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115007889A (en) * | 2022-06-22 | 2022-09-06 | 珠海格力电器股份有限公司 | Electric spindle and machine tool |
| CN117415343A (en) * | 2023-12-06 | 2024-01-19 | 无锡阳光精机股份有限公司 | Built-in main shaft of motor |
-
2020
- 2020-05-14 CN CN202020802345.XU patent/CN212095436U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115007889A (en) * | 2022-06-22 | 2022-09-06 | 珠海格力电器股份有限公司 | Electric spindle and machine tool |
| CN115007889B (en) * | 2022-06-22 | 2024-01-23 | 珠海格力电器股份有限公司 | Electric spindle and machine tool |
| CN117415343A (en) * | 2023-12-06 | 2024-01-19 | 无锡阳光精机股份有限公司 | Built-in main shaft of motor |
| CN117415343B (en) * | 2023-12-06 | 2024-04-26 | 无锡阳光精机股份有限公司 | Built-in main shaft of motor |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211222 Address after: 610000 plant 2, No. 976, Gangtong North 4th Road, north area of Chengdu modern industrial port, Pidu District, Chengdu, Sichuan Patentee after: SICHUAN XINGWANGDA PRECISION ELECTROMECHANICAL Co.,Ltd. Address before: 518000 floor 1, building 4, Jinqiao Industrial Zone, Huangpu Jinqiao Industrial City, Xinqiao street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN PROSPERITY TECH. CO.,LTD. |
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| TR01 | Transfer of patent right |