CN214591034U - Be used for exchanging synchronous servo motor encoder fastening structure of permanent magnetism - Google Patents
Be used for exchanging synchronous servo motor encoder fastening structure of permanent magnetism Download PDFInfo
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- CN214591034U CN214591034U CN202120617938.3U CN202120617938U CN214591034U CN 214591034 U CN214591034 U CN 214591034U CN 202120617938 U CN202120617938 U CN 202120617938U CN 214591034 U CN214591034 U CN 214591034U
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- servo motor
- encoder
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- cylindrical surface
- motor shaft
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Abstract
The utility model discloses a fastening structure for an alternating current permanent magnet synchronous servo motor encoder, the utility model discloses a fastening mode for a permanent magnet synchronous servo motor encoder can improve the connection precision of a servo motor encoder and a servo motor shaft, thereby improving the operation precision of a servo motor; meanwhile, the servo motor shaft and the encoder can be fully and effectively prevented from sliding relative to each other in the circumferential direction through a simple key groove matching mode, so that the problem of zero offset of the encoder caused by looseness of screws due to acceleration, over-fast deceleration and frequent forward and reverse rotation can be solved in the operation process of the servo motor. Therefore, the running stability and reliability of the servo motor are greatly improved. The problem that the motor is burnt down or even more serious due to large current of the servo motor caused by zero offset of the servo motor is avoided. Meanwhile, the motor encoder mounting structure is simple in machining process, convenient to detach and maintain, capable of reducing maintenance cost and widely applicable to the field of motor encoder mounting.
Description
Technical Field
The utility model relates to the technical field of electric machines, especially, relate to a be used for exchanging synchronous servo motor encoder fastening structure of permanent magnetism.
Background
The alternating-current permanent magnet synchronous servo motor for the high-precision machine tool and the robot has high requirements on the torque stability of the motor and the rotating speed fluctuation; meanwhile, the torque density of the alternating-current permanent magnet synchronous servo motor needs to be improved, the module current of a driver is reduced, and the volume of a servo system is reduced. This is necessary to ensure high precision of the servo motor position feedback element encoder and to ensure reliability of the servo motor zero point.
The defects and shortcomings of the prior art are as follows: currently, two main fixing modes of an encoder and a servo motor shaft are available. One is that the servo motor shaft is an outer cone structure, the encoder fixed end is an inner cone structure, through conical surface matching, and meanwhile, a fastening screw is added on the tail end of the shaft, and the zero point of the servo motor encoder is prevented from shifting by means of the friction force between the motor shaft and the encoder fixed end; the utility model provides a for servo motor shaft is outer cylinder structure, the encoder stiff end is interior cylinder structure, through the cooperation of face of cylinder, prevents servo motor encoder zero point skew in addition holding screw simultaneously in the encoder side. With the two structural forms, under the condition that the motor rotates forwards and backwards for a long time or the screw is loosened, the zero point of the motor can be greatly deviated, the loss of the motor can be caused, and even serious safety accidents of a machine tool and a robot can be caused.
The invention can ensure the condition that the fastening screws of the motor shaft and the motor encoder are loosened, the zero point of the servo motor is not deviated, and the reliable operation of the servo motor is ensured.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an aim at just lies in the cooperation with servo motor shaft in order to solve the traditional encoder that exists among the prior art, and the encoder zero offset that appears in the operation process leads to servo motor electric current too big, operates unstably, burns out even, the problem of damage and provides one kind and is used for exchanging permanent magnetism synchronous servo motor encoder fastening structure.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
the utility model comprises a servo motor shaft, a servo motor shaft installation cylindrical surface and an encoder, wherein one side surface of the servo motor shaft installation cylindrical surface is provided with a servo motor shaft installation flat key concave surface, the middle part of the encoder is provided with a penetrating encoder installation cylindrical surface, the encoder installation cylindrical surface is internally provided with an encoder installation flat key convex surface, the shape of the encoder installation flat key convex surface in the encoder installation cylindrical surface is matched with the shape of the servo motor shaft installation cylindrical surface after the servo motor shaft installation cylindrical surface is provided with a servo motor shaft installation flat key concave surface, the side surface of the encoder installation cylindrical surface is provided with a side bolt installation hole, the side bolt installation hole is internally threaded with a side installation fastening bolt, the side installation fastening bolt is contacted with the servo motor shaft installation flat key concave surface on the servo motor shaft installation cylindrical surface, the middle part of the other end of the encoder passes through an end installation fastening bolt, the end part of the installation cylindrical surface of the servo motor shaft is provided with an installation cylindrical surface threaded hole, and the end part of the end part installation fastening bolt is in threaded connection with the installation cylindrical surface threaded hole.
The beneficial effects of the utility model reside in that:
the utility model relates to a be used for exchanging synchronous servo motor encoder fastening structure of permanent magnetism, compared with the prior art, the utility model discloses the synchronous servo motor encoder fastening mode of structure permanent magnetism can improve servo motor encoder and servo motor shaft connection precision to servo motor operation precision has been improved; meanwhile, the servo motor shaft and the encoder can be fully and effectively prevented from sliding relative to each other in the circumferential direction through a simple key groove matching mode, so that the problem of zero offset of the encoder caused by looseness of screws due to acceleration, over-fast deceleration and frequent forward and reverse rotation can be solved in the operation process of the servo motor. Therefore, the running stability and reliability of the servo motor are greatly improved. The problem that the motor is burnt down or even more serious due to large current of the servo motor caused by zero offset of the servo motor is avoided. Meanwhile, the motor encoder mounting structure is simple in machining process, convenient to detach and maintain, capable of reducing maintenance cost and widely applicable to the field of motor encoder mounting.
Drawings
Fig. 1 is a schematic sectional structure of the present invention;
FIG. 2 is a schematic structural view of a servo motor shaft according to the present invention;
fig. 3 is a schematic diagram of the structure of the encoder of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1-3: the utility model comprises a servo motor shaft 1, a servo motor shaft installation cylindrical surface 2 and an encoder 9, wherein one side surface of the servo motor shaft installation cylindrical surface 2 is provided with a servo motor shaft installation flat key concave surface 3, the middle part of the encoder 9 is provided with a penetrating encoder installation cylindrical surface 8, an encoder installation flat key convex surface 6 is arranged in the encoder installation cylindrical surface 8, the shape of the encoder installation flat key convex surface 6 arranged in the encoder installation cylindrical surface 8 is matched with the shape of the servo motor shaft installation cylindrical surface 2 provided with a servo motor shaft installation flat key concave surface 3, the side surface of the encoder installation cylindrical surface 8 is provided with a side bolt installation hole 7, the side bolt installation hole 7 is internally screwed with a side installation fastening bolt 5, the side installation fastening bolt 5 is contacted with the servo motor shaft installation flat key concave surface 3 on the servo motor shaft installation cylindrical surface 2, the middle part of the other end of the encoder 9 penetrates through an end part mounting fastening bolt 10, the end part of the servo motor shaft mounting cylindrical surface 2 is provided with a mounting cylindrical surface threaded hole 4, and the end part of the end part mounting fastening bolt 10 is in threaded connection with the mounting cylindrical surface threaded hole 4.
In order to improve the matching precision of the servo motor shaft and the encoder, the servo motor shaft can be processed at one time by adopting a turning and milling composite machine tool, so that the parallelism between the plane key groove and the cylindrical surface axis is improved;
further preferably, in the embodiment of the present invention, a screw fastening glue may be used when the set screw is connected to the encoder mounting base to prevent the set screw from loosening, or a screw fastening glue may be used when the set screw is connected to the encoder mounting base and the servo motor shaft to prevent the set screw from loosening.
The diameter of the installation cylindrical surface of the servo motor shaft is 9mm, the length of the installation cylindrical surface of the servo motor shaft is 15mm, and the width of the concave surface of the installation flat key of the servo motor shaft is 8 mm; the diameter of the installation cylindrical surface of the encoder is 9mm, the length of the installation cylindrical surface of the encoder is 13mm, the width of the convex surface of the installation flat key of the encoder is 8mm, and the fit clearance between the shaft of the servo motor and the encoder is 0.02 mm; servo motor shaft and encoder can carry out accurate axial positioning through the face of cylinder like this, and the slip that can take place the circumferencial direction hardly between encoder installation base and the servo motor shaft takes place to slide in time, and angle that can slide is also very little, only does servo motor shaft with the fit clearance of encoder.
Installing the set screw on the circular shaft surface of the encoder installation base by using an inner hexagonal wrench, and when the set screw is installed, using thread fastening glue between the screw and the thread to prevent loosening; and the fastening screw is installed between the end surface of the installation cylindrical surface of the servo motor shaft and the encoder installation base by using an inner hexagonal wrench, and when the fastening screw is installed, thread fastening glue is used between the screw and the thread to prevent loosening. Therefore, the installation precision between the shaft of the servo motor and the encoder can be ensured, and the zero point of the servo motor can not generate large offset when the servo motor rotates at high speed and high frequency, so that the operation reliability of the servo motor can be improved.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The utility model provides a be used for exchanging synchronous servo motor encoder fastening structure of permanent magnetism, includes servo motor shaft (1), servo motor axle installation face of cylinder (2) and encoder (9), its characterized in that: a servo motor shaft installation flat key concave surface (3) is arranged on one side surface of the servo motor shaft installation cylindrical surface (2), a penetrating encoder installation cylindrical surface (8) is arranged in the middle of the encoder (9), an encoder installation flat key convex surface (6) is arranged in the encoder installation cylindrical surface (8), the shape of the encoder installation flat key convex surface (6) arranged in the encoder installation cylindrical surface (8) is matched with the shape of the servo motor shaft installation cylindrical surface (2) arranged with the servo motor shaft installation flat key concave surface (3), a side surface bolt installation hole (7) is arranged on the side surface of the encoder installation cylindrical surface (8), a side surface installation fastening bolt (5) is connected with the side surface bolt installation hole (7) through internal threads, the side surface installation fastening bolt cylindrical surface (5) is contacted with the servo motor shaft installation flat key concave surface (3) on the servo motor shaft installation cylindrical surface (2), the middle of the other end of the encoder (9) penetrates through an end mounting fastening bolt (10), an end mounting cylindrical surface threaded hole (4) is formed in the end of the servo motor shaft mounting cylindrical surface (2), and the end of the end mounting fastening bolt (10) is in threaded connection with the end mounting cylindrical surface threaded hole (4).
2. The fastening structure for an alternating-current permanent magnet synchronous servo motor encoder according to claim 1, wherein: servo motor axle installation face of cylinder (2) diameter is 9mm, servo motor axle installation face of cylinder (2) length is 15mm, the width of servo motor axle installation parallel key concave surface (3) is 8mm, the internal diameter of encoder installation face of cylinder (8) is 9mm, the length of encoder installation parallel key convex surface (6) is 13mm, the width of encoder installation parallel key convex surface (6) is 8 mm.
3. The fastening structure for an alternating-current permanent magnet synchronous servo motor encoder according to claim 1, wherein: and the installation fit clearance between the servo motor shaft installation cylindrical surface (2) and the encoder installation cylindrical surface (8) is 0.02 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120617938.3U CN214591034U (en) | 2021-03-26 | 2021-03-26 | Be used for exchanging synchronous servo motor encoder fastening structure of permanent magnetism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120617938.3U CN214591034U (en) | 2021-03-26 | 2021-03-26 | Be used for exchanging synchronous servo motor encoder fastening structure of permanent magnetism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214591034U true CN214591034U (en) | 2021-11-02 |
Family
ID=78322013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120617938.3U Active CN214591034U (en) | 2021-03-26 | 2021-03-26 | Be used for exchanging synchronous servo motor encoder fastening structure of permanent magnetism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214591034U (en) |
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2021
- 2021-03-26 CN CN202120617938.3U patent/CN214591034U/en active Active
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