Encoder mounting structure for motor

Abstract

The invention belongs to the technical field of encoder installation, particularly relates to an encoder installation structure for a motor, and aims to solve the problems of high installation difficulty, difficulty in concentricity of a motor shaft and an encoder rotating shaft and magnetic field interference in the prior art. Butt-joint pieces distributed at equal intervals are welded to the outer wall of one side of the shaft sleeve, and positioning rings are welded to the outer walls of one sides of the butt-joint pieces. The inclined pressing block can extrude the rotating shaft of the encoder body so that the rotating shaft can be fixed in the shaft sleeve, then the rotating shaft of the encoder body can be driven to rotate through the motor shaft, hole grooves do not need to be formed in advance, the installation difficulty is greatly reduced, and the bearing and the positioning ring can guarantee that the motor shaft and the rotating shaft keep stable in the synchronous rotation process; and the electromagnetic shielding cover can wrap the encoder main body, so that the encoder has a good electromagnetic shielding effect, and the precision of a signal is prevented from being interfered by a magnetic field.

Description

Technical Field

[0001] The invention relates to the technical field of encoder installation, and in particular to an encoder installation structure for a motor. Background Art

[0002] The encoder is used at the motor shaft end to allow the motor to play a protective role and transmit in the form of electrical signals. The advantages of connecting the encoder to the motor are: first, it has the characteristics of high coaxial accuracy, precise movement, easy installation, compact structure, wide applicability, and high protection level; secondly, the encoder uses photoelectric effect to measure physical quantities such as length, position, speed or angle, and converts mechanical displacement into electrical signal sensors. It has a small size, high-quality signals, anti-fatigue compensation, temperature compensation and short-circuit protection, and is resistant to impact and vibration.

[0003] However, the following points should be noted when installing the encoder to the motor:

[0004] First, the connection structure between the encoder and the motor output end usually needs to be fixed by screws, which requires pre-opening holes and slots at the end of the encoder's rotating shaft, making installation more difficult.

[0005] In addition, the motor shaft and the encoder rotating shaft need to be concentric. If they are not concentric, there will be errors in the detection accuracy, and the encoder needs to be away from the environment with magnetic field interference. The resolver itself relies on magnetic field coupling, and magnetic field interference will affect the accuracy of the signal. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides an encoder installation structure for a motor, which overcomes the deficiencies of the prior art and effectively solves the problems of difficult installation, difficulty in concentricity between the motor shaft and the encoder rotating shaft, and magnetic field interference.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An encoder installation structure for a motor comprises a shaft sleeve, an outer wall of one side of the shaft sleeve is welded with butt pieces distributed at equal distances, and an outer wall of one side of the butt piece is welded with a positioning ring, an inner wall of one end of the shaft sleeve close to the butt piece is fixedly connected with a shaft pin distributed at equal distances, and an outer wall of the shaft pin is rotatably connected with an oblique pressure block, and a spring is fixedly connected between the oblique pressure block and the shaft sleeve;

[0009] An encoder body is provided on the inner wall of one side of the sleeve, an end ring is provided on the outer wall of the other side of the sleeve, and symmetrically distributed extension pieces are welded on the inner wall of the end ring, and a connecting rod is fixedly connected to the outer wall of one side of the extension piece by screws, a fixing sleeve is welded between the two connecting rods, and a bearing is installed on the inner wall of the fixing sleeve, an electromagnetic shielding cover is screwed on the outer wall of the end ring, and an inner frame is welded on the inner wall of one end of the electromagnetic shielding cover, and the encoder body is arranged on the inner wall of the inner frame.

[0010] Preferably, the rotating shaft of the encoder body is tightly attached to the outer wall of one end of the inclined pressure block, and the rotating shaft of the encoder body is rotatably connected to the inner wall of the positioning ring.

[0011] Preferably, transverse grooves are formed on both sides and the outer wall of the bottom of the electromagnetic shielding cover, and symmetrically distributed end grooves are formed on the outer wall of one end of the electromagnetic shielding cover.

[0012] Preferably, anti-slip strips distributed at equal distances are provided at one end of the periphery of the electromagnetic shielding cover.

[0013] Preferably, a signal line is fixedly connected to an outer wall of one side of the encoder body, and a threading hole is opened at the center of the outer wall of one end of the electromagnetic shielding cover, and the signal line is passed through the inner wall of the threading hole.

[0014] Preferably, the end ring is fixedly connected to the motor body by screws.

[0015] Preferably, the output end of the motor body is fixedly connected to a motor shaft, and a bearing is arranged on an outer wall of the motor shaft.

[0016] Preferably, a fixing opening is provided on the inner wall of the other end of the sleeve, and the motor shaft is fixedly connected to the inner wall of the fixing opening.

[0017] The beneficial effects of the present invention are:

[0018] 1. The encoder installation structure for the motor of the present invention, when the motor shaft is fixed to the inside of the sleeve, the rotating shaft of the encoder body will contact the inclined pressure block through the encoder body close to the sleeve, and the inclined pressure block will squeeze the rotating shaft of the encoder body to fix it inside the sleeve, and then the rotating shaft of the encoder body can be driven to rotate by the motor shaft, and there is no need to pre-open the hole groove, which greatly reduces the difficulty of installation;

[0019] 2. The encoder installation structure for the motor of the present invention is limited by the bearing and the fixed sleeve on the outside of the motor shaft. At the same time, a positioning ring is set on the rotating shaft of the encoder body. The bearing and the positioning ring can ensure that the motor shaft and the rotating shaft maintain stability during synchronous rotation, thereby improving the concentricity between the two.

[0020] 3. The encoder installation structure for the motor of the present invention is not only convenient for disassembly and assembly, because the electromagnetic shielding cover is fixed to the end ring by screwing, but the electromagnetic shielding cover can also wrap the encoder body inside, which has a good electromagnetic shielding effect and avoids the magnetic field from interfering with the accuracy of the signal. At the same time, the encoder body is arranged in the inner frame, which plays a role in fixing the encoder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of an encoder installation structure for a motor proposed by the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of an electromagnetic shielding cover of an encoder installation structure for a motor proposed by the present invention;

[0023] Figure 3 A schematic diagram of a shaft sleeve connection of an encoder mounting structure for a motor proposed by the present invention;

[0024] Figure 4 The present invention is a schematic diagram of the inner wall structure of a shaft sleeve of an encoder mounting structure for a motor proposed by the present invention.

[0025] In the figure: 1. shaft sleeve; 2. docking piece; 3. positioning ring; 4. shaft pin; 5. inclined pressure block; 6. spring; 7. encoder body; 8. end ring; 9. extension piece; 10. connecting rod; 11. fixing sleeve; 12. bearing; 13. electromagnetic shielding cover; 14. inner frame; 15. transverse groove; 16. end groove; 17. anti-slip strip; 18. signal line; 19. threading hole; 20. motor body; 21. motor shaft; 22. fixing port. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Embodiment 1, refer to Figure 4 , an encoder installation structure for a motor, comprising a shaft sleeve 1, an outer wall of one side of the shaft sleeve 1 is welded with equally distributed docking pieces 2, and an outer wall of one side of the docking piece 2 is welded with a positioning ring 3, an inner wall of one end of the shaft sleeve 1 close to the docking piece 2 is fixedly connected with equally distributed shaft pins 4, and the outer wall of the shaft pin 4 is rotatably connected with an oblique pressure block 5, and a spring 6 is fixedly connected between the oblique pressure block 5 and the shaft sleeve 1.

[0028] In this embodiment, when the motor shaft 21 is fixed to the inside of the sleeve 1, the rotating shaft of the encoder body 7 will contact the inclined pressure block 5 through the encoder body 7 approaching the sleeve 1. The inclined pressure block 5 will squeeze the rotating shaft of the encoder body 7 to fix it inside the sleeve 1, and then the rotating shaft of the encoder body 7 can be driven to rotate through the motor shaft 21. There is no need to pre-open holes and grooves, which greatly reduces the difficulty of installation.

[0029] Example 2, refer to Figure 2-3 , an encoder installation structure for a motor, an encoder body 7 is arranged on the inner wall of one side of a sleeve 1, an end ring 8 is arranged on the outer wall of the other side of the sleeve 1, and the inner wall of the end ring 8 is welded with symmetrically distributed extension pieces 9, and the outer wall of one side of the extension piece 9 is fixedly connected with a connecting rod 10 by screws, a fixing sleeve 11 is welded between the two connecting rods 10, and a bearing 12 is installed on the inner wall of the fixing sleeve 11, an electromagnetic shielding cover 13 is screwed on the outer wall of the end ring 8, and an inner frame 14 is welded on the inner wall of one end of the electromagnetic shielding cover 13, and the encoder body 7 is arranged on the inner wall of the inner frame 14.

[0030] In this embodiment, the outside of the motor shaft 21 is limited by the bearing 12 and the fixing sleeve 11. At the same time, a positioning ring 3 is arranged on the rotating shaft of the encoder body 7. The bearing 12 and the positioning ring 3 can ensure that the motor shaft 21 and the rotating shaft maintain stability during synchronous rotation, thereby improving the concentricity between the two. Since the electromagnetic shielding cover 13 is fixed to the end ring 8 by screwing, it is not only convenient for disassembly and assembly, but also the electromagnetic shielding cover 13 can wrap the encoder body 7 inside, which has a good electromagnetic shielding effect and avoids magnetic field interference with signal accuracy. At the same time, the encoder body 7 is arranged in the inner frame 14, which plays a role in fixing the encoder body 7.

[0031] Reference Figure 4 The rotating shaft of the encoder body 7 is closely attached to the outer wall of one end of the inclined pressure block 5 , and the rotating shaft of the encoder body 7 is rotatably connected to the inner wall of the positioning ring 3 .

[0032] Reference Figure 1 The electromagnetic shielding cover 13 has transverse grooves 15 on both sides and the bottom outer wall, and the electromagnetic shielding cover 13 has symmetrically distributed end grooves 16 on the outer wall at one end.

[0033] Reference Figure 1 One end of the electromagnetic shielding cover 13 is provided with anti-slip strips 17 distributed at equal distances.

[0034] Reference Figure 1 A signal line 18 is fixedly connected to the outer wall of one side of the encoder body 7 , and a threading hole 19 is opened at the center of the outer wall of one end of the electromagnetic shielding cover 13 , and the signal line 18 is arranged on the inner wall of the threading hole 19 through.

[0035] Reference Figure 1and Figure 3 The end ring 8 is fixedly connected to the motor body 20 by screws.

[0036] Reference Figure 1-2 The output end of the motor body 20 is fixedly connected to the motor shaft 21 , and the bearing 12 is arranged on the outer wall of the motor shaft 21 .

[0037] Reference Figure 4 A fixing opening 22 is provided on the inner wall of the other end of the sleeve 1 , and the motor shaft 21 is fixedly connected to the inner wall of the fixing opening 22 .

[0038] Working principle: First, fix the end ring 8 on the end wall of the motor body 20 by screws, and then fix the motor shaft 21 to the fixing port 22 inside the sleeve 1. At this time, pass the rotating shaft of the encoder body 7 through the positioning ring 3 close to the sleeve 1. In this process, fix the electromagnetic shielding cover 13 on the end ring 8 by screwing. At this time, the encoder body 7 is arranged in the inner frame 14, which can fix the encoder body 7, and the electromagnetic shielding cover 13 can wrap the encoder body 7 inside to increase the electromagnetic shielding effect. In the process of the electromagnetic shielding cover 13 being continuously screwed to the end ring 8, the rotating shaft of the encoder body 7 will contact the inclined pressure block 5, and the inclined pressure block 5 will squeeze the rotating shaft of the encoder body 7, so that it is fixed inside the sleeve 1, and then the rotating shaft of the encoder body 7 can be driven to rotate through the motor shaft 21.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An encoder mounting structure for a motor, comprising a sleeve (1), characterized in that: The outer wall of one side of the shaft sleeve (1) is welded with docking pieces (2) distributed at equal distances, and the outer wall of one side of the docking piece (2) is welded with a positioning ring (3); the inner wall of one end of the shaft sleeve (1) close to the docking piece (2) is fixedly connected with axle pins (4) distributed at equal distances, and the outer wall of the axle pin (4) is rotatably connected with an inclined pressure block (5), and a spring (6) is fixedly connected between the inclined pressure block (5) and the shaft sleeve (1); An encoder body (7) is arranged on the inner wall of one side of the shaft sleeve (1), an end ring (8) is arranged on the outer wall of the other side of the shaft sleeve (1), and symmetrically distributed extension pieces (9) are welded to the inner wall of the end ring (8), and a connecting rod (10) is fixedly connected to the outer wall of one side of the extension piece (9) by screws, a fixing sleeve (11) is welded between the two connecting rods (10), and a bearing (12) is installed on the inner wall of the fixing sleeve (11), an electromagnetic shielding cover (13) is screwed to the outer wall of the end ring (8), and an inner frame (14) is welded to the inner wall of one end of the electromagnetic shielding cover (13), and the encoder body (7) is arranged on the inner wall of the inner frame (14).

2. The encoder installation structure for a motor according to claim 1, characterized in that: The rotating shaft of the encoder body (7) is tightly attached to the outer wall of one end of the inclined pressure block (5), and the rotating shaft of the encoder body (7) is rotatably connected to the inner wall of the positioning ring (3).

3. The encoder installation structure for a motor according to claim 1, characterized in that: The electromagnetic shielding cover (13) has transverse grooves (15) on both sides and the bottom outer wall, and the outer wall at one end of the electromagnetic shielding cover (13) has symmetrically distributed end grooves (16).

4. The encoder installation structure for a motor according to claim 1, characterized in that: One end of the periphery of the electromagnetic shielding cover (13) is provided with anti-slip strips (17) distributed at equal distances.

5. The encoder installation structure for a motor according to claim 1, characterized in that: A signal line (18) is fixedly connected to the outer wall of one side of the encoder body (7), and a threading hole (19) is provided at the center of the outer wall of one end of the electromagnetic shielding cover (13), and the signal line (18) is arranged to pass through the inner wall of the threading hole (19).

6. The encoder installation structure for a motor according to claim 1, characterized in that: The end ring (8) is fixedly connected to the motor body (20) via screws.

7. The encoder installation structure for a motor according to claim 6, characterized in that: The output end of the motor body (20) is fixedly connected to a motor shaft (21), and the bearing (12) is arranged on the outer wall of the motor shaft (21).

8. The encoder installation structure for a motor according to claim 1, characterized in that: The inner wall of the other end of the shaft sleeve (1) is provided with a fixing opening (22), and the motor shaft (21) is fixedly connected to the inner wall of the fixing opening (22).

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