CN211803847U

CN211803847U - Novel electric spindle device

Info

Publication number: CN211803847U
Application number: CN201922424123.9U
Authority: CN
Inventors: 许亮; 唐湘平; 张进; 文斌; 刘明松
Original assignee: Yuhuan Cnc Machine Tool Co ltd
Current assignee: Yuhuan Cnc Machine Tool Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-10-30
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a novel electric main shaft device, which comprises a main shaft part and an oil cylinder part; the main shaft part comprises a shell, a stator and a rotor which are arranged in the shell, a transmission shaft which is fixedly connected with the rotor and is provided with a central through hole, and a pull rod which is arranged in the central through hole of the transmission shaft through a radial limiting part and can axially move; the oil cylinder part comprises a cylinder body fixedly connected with the shell of the main shaft part and a piston rod rotatably arranged in the cylinder body, one end of the piston rod is connected with the pull rod, and the other end of the piston rod is provided with a displacement sensor. The utility model discloses can provide the circumference moment for the casing, can provide the axial moment for the casing again.

Description

Novel electric spindle device

Technical Field

The utility model belongs to electric main shaft, concretely relates to novel electric main shaft device.

Background

The electric spindle is widely applied in the field of machine tools, but the traditional electric spindle has the characteristics of high rotating speed and low torque and can only provide torque relative to the circumferential direction of the electric spindle. Many current mechanical structures require forces in more than one direction. To solve this problem, the conventional approach generally continues to add mechanical structure. However, such a solution not only results in a complex product structure, but also tends to greatly increase the volume, weight, floor space, etc. of the machine tool, and indirectly increases the production cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel electricity main shaft device can provide for the steady moment of electricity main shaft circumference can provide axial two-way effort again.

Realize the utility model discloses the technical scheme of purpose is:

the utility model provides a novel electric main shaft device, which comprises a main shaft part and an oil cylinder part; the main shaft part comprises a shell, a stator and a rotor which are arranged in the shell, a transmission shaft which is fixedly connected with the rotor and is provided with a central through hole, and a pull rod which is arranged in the central through hole of the transmission shaft through a radial limiting part and can axially move; the oil cylinder part comprises a cylinder body fixedly connected with the shell of the main shaft part and a piston rod rotatably arranged in the cylinder body, one end of the piston rod is connected with the pull rod, and the other end of the piston rod is provided with a displacement sensor.

The transmission shaft is fixed with a grating, and the shell is fixed with an induction contact corresponding to the grating.

The radial limiting component is a clamp arranged at the end part of the main shaft part, the clamp comprises an outer core fixedly connected with the shell and an inner core arranged in the outer core and connected with the outer core in a key mode, and the inner core is fixedly connected with the pull rod.

The pull rod in the main shaft part comprises a first pull rod and a second pull rod connected with the first pull rod, and the end part of the second pull rod is connected with the inner core.

The piston rod is provided with a central through hole, a third pull rod is arranged in the central through hole of the piston rod, one end of the third pull rod is connected with the first pull rod, and the other end of the third pull rod is connected with the displacement sensor.

Has the advantages that:

the utility model has the characteristics as follows:

1. the rotary piston rod is combined with a common electric spindle. The utility model discloses thereby well stator circular telegram produces electromagnetic induction and drives the rotor rotation, and the transmission shaft can be followed the rotor and rotatory with the same direction and angular velocity, and the inner core and the outer core of piston rod, pull rod, anchor clamps all can be the same direction and angular velocity rotation with the transmission shaft, and meanwhile under the hydraulic oil promotion of rotatory hydro-cylinder part, axial motion can be to the casing to the inner core of piston rod, pull rod, anchor clamps. This has just realized the utility model discloses can provide the circumference moment for the casing, can provide the utility model purpose for the axial moment of casing again.

2. The clamp is used as a medium for power transmission. The outer core of the clamp is connected with the inner core in a key connection mode, the outer core can drive the inner core to rotate, and the inner core can slide and displace in the outer core relative to the axial direction of the shell. The fixture combines the rotary piston rod and the common electric spindle to form a novel multifunctional electric spindle.

3. And a displacement sensor. The displacement sensor is connected with the pull rod, can be used for accurately controlling the displacement of the clamp, and protects the clamp from being damaged due to inaccurate displacement.

The technical scheme of the utility model is further explained in the following with the attached drawings.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the main shaft portion of the present invention.

Fig. 3 is a schematic structural diagram of the middle cylinder part of the present invention.

Fig. 4 is a schematic diagram of different states of the middle cylinder part of the present invention.

In the figure: 1. a housing; 2. a stator; 3. a rotor; 4. a drive shaft; 5. a nut A; 6. a shaft sleeve A; 7. a shaft sleeve B; 8. a sealing ring A; 9. a shaft sleeve C; 10. a bearing A; 11. a grating; 12. a nut B; 13. an inductive contact; 14. a gland; 15. an end cap A; 16. a seal ring B; 17. a bearing B; 18. a bearing C; 19. a sleeve; 20. an end cap B; 21. a seal ring C; 22. an end cap C; 23. a pull rod B; 24. a pull rod A; 25. a piston rod; 26. an end cap D; 27. a screw; 28. an oil cylinder A; 29. a seal ring D; 30. an elastic block A; 31. an oil cylinder B; 32. a bearing D; 33. a seal ring E; 34. an end cap E; 35. a displacement sensor; 36. a pull rod C; 37. an oil hole A; 38. an oil path A; 39. an oil passage B; 40. an oil chamber A; 41. an oil chamber B; 42. an oil hole B; 43. a screw hole A; 44. a screw hole B; 45. a clamp; 46. a main shaft box body; 47. a support pillar; 48. an elastic block B; 49. a bearing E; 50. a bearing F; 51. and a bearing G.

Detailed Description

Referring to fig. 1-3, the present invention is composed of a main shaft part (see fig. 2) and an oil cylinder part (see fig. 3 and 4); the main shaft part comprises a shell, a stator 2 and a rotor 3 which are arranged in the shell, a transmission shaft 4 which is fixedly connected with the rotor 3 and is provided with a central through hole, and a pull rod which is arranged in the central through hole of the transmission shaft 4 through a radial limiting part and can axially move; the oil cylinder part comprises a cylinder body fixedly connected with the shell of the main shaft part and a piston rod rotatably arranged in the cylinder body, one end of the piston rod is connected with the pull rod, and the other end of the piston rod is provided with a displacement sensor 35.

The transmission shaft 4 is fixed with a grating 11, and the shell is fixed with an induction contact 13 corresponding to the grating 11.

The radial limiting component is a clamp 45 arranged at the end part of the transmission shaft 4 of the main shaft part, the clamp 45 comprises an outer core 45a fixedly connected with the transmission shaft 4 and an inner core 45b arranged in the outer core 45a and connected with the outer core 45a in a key mode, and the inner core 45b is fixedly connected with the pull rod.

The pull rod in the main shaft part comprises a pull rod B23 and a pull rod A24 connected with the pull rod B23, and the end part of the pull rod A24 is connected with the inner core 45B.

The piston rod 25 is provided with a central through hole, a pull rod C36 is arranged in the central through hole of the piston rod 25, one end of the pull rod C36 is connected with the pull rod B23, and the other end of the pull rod C36 is connected with the displacement sensor 35.

The more specific structure of the utility model is as shown in fig. 1 and fig. 2, the main shaft part mainly comprises a shell 1, a stator 2, a rotor 3, a transmission shaft 4, a nut A5, a shaft sleeve A6, a shaft sleeve B7, a sealing ring A8, a shaft sleeve C9, a bearing a10, a grating 11, a nut B12, an inductive contact 13, a gland 14, an end cover a15, a sealing ring B16, a bearing B17, a bearing C18, a sleeve 19, an end cover B20, a sealing ring C21, an end cover C22, a pull rod B23, a pull rod a24 and the like, wherein the shell is composed of the shell 1, the gland 14, the end cover a15 and the end cover B596; the end cover A15 is fastened on the shell 1 through bolt connection, the stator 2, the shaft sleeve A6 and the shaft sleeve B7 are extruded by the end cover A15 and the shell 1 in the middle, and the stator 2, the shaft sleeve A6 and the shaft sleeve B7 are restrained relative to the axial direction of the shell 1; the nut A5 fastens the rotor 3 on the transmission shaft 4 through threaded connection, the end cover B20 fastens on the shell 1 through bolt connection, and the end cover A15, the bearing E49, the transmission shaft 4, the bearing B17 inner ring, the bearing C18 inner ring, the sleeve 19, the bearing F50 and the end cover B20 are fixed together through mutual extrusion in the axial direction relative to the shell 1; the end cover B20 presses the outer rings of the bearing C18 and the bearing B17 and the transmission shaft 4 together through threaded connection with the shell 1; the grating 11 is fixed on the transmission shaft 4 through threaded connection by the nut 12, the induction contact 13 is fixed on the end cover A15 through bolt connection, and the induction contact 13 is matched with the grating 11 to measure the rotating speed of the transmission shaft 4; the shaft sleeve A6 and the shaft sleeve C9 fix the shaft sleeve B7 and the sealing ring A8 in the middle through extrusion; end cap C22 and end cap B20 fix seal ring C21 in the middle by pressing, where seal ring a8, seal ring B16 and seal ring C21 seal.

As shown in fig. 1-3, when the stator 2 is energized to generate electromagnetic induction to drive the rotor 3 to rotate, the rotor 3 is fixed with the transmission shaft 4 by the locking force of the nut a5, so that the transmission shaft 4 rotates along with the rotor 3 in the same direction and angular speed, and the transmission shaft 4 is fastened with the outer core of the clamp 45 by bolt connection; the clamp 45 is mainly divided into an outer core 45a and an inner core 45b, wherein the outer core 45a is a cylinder with a hollow inner part, and the inner core 45b is a cylinder similar to a spline, so that the outer core 45a and the inner core 45b are connected in a key connection mode, the outer core 45a can drive the inner core 45b to rotate along with the transmission shaft 4, and the inner core 45b can perform sliding displacement relative to the outer core 45a in the axial direction of the shell 1; the inner core 45B of the clamp 45 is fastened with a pull rod A24 through threaded connection, the pull rod A24 is fastened with a pull rod B23 through threaded connection, the pull rod B23 is connected with a screw hole A43 at the end of the piston rod 25 through threaded connection, and the side wall of the end of the piston rod 25 is provided with a screw hole B44 for arranging a screw to position the pull rod B23. Therefore, the piston rod 25, the pull rod B23, the pull rod a24, the inner core 45B and the outer core 45a of the clamp 45 all rotate with the transmission shaft 4 in the same direction and at the same time, under the pushing of the hydraulic oil of the oil cylinder part, the piston rod 25 can drive the inner core 45B of the pull rod B23, the pull rod a24 and the clamp 45 to move axially relative to the shell 1, which is just realized by the utility model discloses can provide the circumferential moment relative to the shell 1, can provide the technical effect of the axial moment relative to the shell 1 again.

As shown in fig. 1 and 2, the gland 14 is connected with the end cap a15 through a wedge surface, and the gland 14 can compress the end cap a15 in the axial direction of the housing 1. The whole electric spindle is fixed on the spindle box 46 by the shell 1 and the gland 14 through bolt connection.

The oil cylinder part is shown in fig. 1 and 3 and comprises an end cover D26, an oil cylinder A28, an end cover E34, an oil cylinder B31 and a piston rod 25, wherein the end cover D26, the oil cylinder A28, the end cover E34 and the oil cylinder B31 form a cylinder body; the oil cylinder A28 and the end cover D26 are fastened with the end cover 15 of the main shaft part through a screw 27; the end cover E34 is fastened with the oil cylinder B31 through bolts, and presses the sealing ring E33 and the bearing D32 in the oil cylinder B31; the oil cylinder A28 and the oil cylinder B31 are fixedly connected through bolts, a sealing ring D29 and a bearing G51 are pressed in the oil cylinder B31, and the piston rod 25 is arranged on a bearing D32 and a bearing G51 in the cylinder body; an oil hole A37 is formed in the oil cylinder B31, an oil hole B42, an oil chamber A40 and an oil chamber B41 communicated with the oil hole B42 are formed in the oil cylinder A28, an oil path A38 and an oil path B39 communicated with the oil hole A37 and the oil chamber A40 are formed in the piston rod 25, and elastic blocks A30 and elastic blocks B48 located at two ends of the piston rod 25 are respectively arranged in the end cover D26 and the end cover E34; the piston rod 25 is provided with a central through hole, the pull rod C36 is installed in the central through hole of the piston rod 25, one end of the pull rod C36 is connected with the pull rod B23, the other end of the pull rod C36 is connected with the displacement sensor 35, the displacement sensor 35 is fixed on the supporting column 47, and the displacement sensor 35 is used for accurately controlling the displacement of the clamp 45, so that the clamp is protected from being damaged due to inaccurate displacement.

When the oil hole A37 is filled with oil, hydraulic oil enters the oil chamber A40 through the oil path A38 and the oil path B39, and the piston rod 25 is pushed to the oil chamber B41 from the oil chamber A40 until the piston rod 25 is positioned at the upper limit position; when the oil hole B42 takes oil, hydraulic oil enters the oil chamber B41, and the piston rod 25 is pushed from the oil chamber B41 to the oil chamber a40 by the hydraulic oil until the piston rod 25 is located at the lower limit position, see fig. 4.

Claims

1. A novel electric main shaft device is characterized by comprising a main shaft part and an oil cylinder part; the main shaft part comprises a shell, a stator and a rotor which are arranged in the shell, a transmission shaft which is fixedly connected with the rotor and is provided with a central through hole, and a pull rod which is arranged in the central through hole of the transmission shaft through a radial limiting part and can axially move; the oil cylinder part comprises a cylinder body fixedly connected with the shell of the main shaft part and a piston rod rotatably arranged in the cylinder body, one end of the piston rod is connected with the pull rod, and the other end of the piston rod is provided with a displacement sensor.

2. The new electric spindle unit according to claim 1, wherein a grating is fixed to the transmission shaft, and an inductive contact corresponding to the grating is fixed to the housing.

3. The new electric spindle device according to claim 1 or 2, wherein the radial position-limiting component is a clamp provided at an end of the spindle portion, the clamp includes an outer core fixedly connected to the housing, and an inner core provided in the outer core and connected to the outer core by a key, and the inner core is fixedly connected to the pull rod.

4. The new electric spindle unit according to claim 3, wherein the pull rod of the spindle part comprises a first pull rod and a second pull rod connected to the first pull rod, and an end of the second pull rod is connected to the inner core.

5. The new electric spindle unit according to claim 4, wherein the piston rod has a central through hole, and a third pull rod is disposed in the central through hole of the piston rod, and one end of the third pull rod is connected to the first pull rod, and the other end of the third pull rod is connected to the displacement sensor.