Double-encoder mounting structure and servo motor with same

Abstract

The utility model discloses a kind of double-encoder mounting structure and servo motor with it, the double-encoder mounting structure is installed on servo motor, and it includes: encoder connecting shaft, its front end passes through the rear end cover of servo motor and is coaxially connected with the rear end of the rotating shaft of servo motor;Hollow shaft encoder, its inner ring is detachably coaxially sleeved on the encoder connecting shaft, its outer ring is detachably connected with the rear end cover of servo motor;There is shaft encoder, the shaft body of which is detachably coaxially connected with the rear end of the encoder connecting shaft, and the main body is detachably connected with the rear end cover of servo motor by connecting piece.The utility model aims at providing a kind of double-encoder mounting structure capable of simultaneously compatible two different encoders, to effectively improve servo system response speed and eliminate static error.

Description

Technical Field

[0001] This utility model relates to the field of servo motors. More specifically, this utility model relates to a dual encoder mounting structure and a servo motor having the same. Background Technology

[0002] Traditional permanent magnet servo motors require an encoder to collect position and speed signals for real-time closed-loop control. However, in practical applications, due to the wide variety of encoders, different types of encoders are needed to meet different requirements. This often necessitates changes to the motor structure design for different encoders, increasing design workload and placing higher demands on the versatility of permanent magnet motor design. Furthermore, servo systems using a single encoder still have room for improvement in terms of system response speed and static error during control. Utility Model Content

[0003] The purpose of this invention is to provide a dual encoder mounting structure that can simultaneously accommodate two different encoders, thereby effectively improving the response speed of the servo system and eliminating static errors.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A dual encoder mounting structure, mounted on a servo motor, comprising:

[0005] The encoder connecting shaft has its front end passing through the rear end cover of the servo motor and coaxially connected to the rear end of the servo motor's rotating shaft.

[0006] A hollow shaft encoder, wherein the inner ring is detachably coaxially sleeved on the encoder connecting shaft, and the outer ring is detachably connected to the rear end cover of the servo motor.

[0007] A shaft encoder, the shaft of which is detachably coaxially connected to the rear end of the encoder connecting shaft, and its main body is detachably connected to the rear end cover of the servo motor via a connector.

[0008] Furthermore, in the aforementioned dual encoder mounting structure, the front end of the encoder connecting shaft is coaxially provided with a threaded shaft, and the rear end of the servo motor shaft is coaxially provided with a threaded hole, with the threaded shaft threadedly installed in the threaded hole.

[0009] Furthermore, in the aforementioned dual encoder mounting structure, a positioning ring is provided on the encoder connecting shaft, and the positioning ring abuts against the rear end of the servo motor shaft.

[0010] Furthermore, in the aforementioned dual encoder mounting structure, the encoder connecting shaft has an external thread and a nut is threadedly installed thereon. The nut and the positioning ring form a clamping position corresponding to the inner ring of the hollow shaft encoder.

[0011] Furthermore, in the aforementioned dual encoder mounting structure, the rear end of the encoder connecting shaft is coaxially provided with a positioning hole, and the shaft of the shaft encoder is coaxially embedded in the positioning hole.

[0012] Furthermore, in the aforementioned dual encoder mounting structure, the connector is an encoder housing, which is mounted on the rear end cover of the servo motor. The encoder connecting shaft and the hollow shaft encoder are both located inside the encoder housing, and the main body of the shaft encoder passes through the encoder housing and is embedded inside the encoder housing.

[0013] This utility model also provides a servo motor, including the dual encoder mounting structure described in any of the above claims.

[0014] The beneficial effects of this utility model are:

[0015] This invention features a dual encoder mounting structure compatible with two different encoders, facilitating easy disassembly and installation on servo motors to effectively improve servo system response speed and eliminate static errors. Furthermore, the number of encoders can be selected according to actual needs, allowing for both single and dual encoders, offering flexibility and convenience.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the dual encoder mounting structure described in this utility model;

[0018] Figure 2 This is a schematic diagram of the encoder connecting shaft of the present invention;

[0019] Figure 3 This is a cross-sectional view of the encoder connecting shaft described in this utility model;

[0020] Figure 4 This is a schematic diagram of the encoder housing of this utility model;

[0021] Figure 5 This is a cross-sectional view of the encoder housing described in this utility model. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0023] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Figures 1-5 The present invention provides a dual encoder mounting structure, mounted on a servo motor, comprising:

[0025] The encoder connecting shaft 1 has its front end passing through the rear end cover 2 of the servo motor and coaxially connected to the rear end of the servo motor's rotating shaft 3.

[0026] The hollow shaft encoder 4 has its inner ring detachably coaxially sleeved on the encoder connecting shaft 1, and its outer ring detachably connected to the rear end cover 2 of the servo motor; the front end of the encoder connecting shaft 1 is coaxially provided with a threaded shaft 6, and the rear end of the servo motor shaft 3 is coaxially provided with a threaded hole, and the threaded shaft 6 is threadedly installed in the threaded hole.

[0027] The shaft encoder 5 has its shaft body detachably coaxially connected to the rear end of the encoder connecting shaft 1, and its main body is detachably connected to the rear end cover 2 of the servo motor via a connector; the connector is the encoder cover 10, which is set on the rear end cover 2 of the servo motor. The encoder connecting shaft 1 and the hollow shaft encoder 4 are both located inside the encoder cover 10, and the main body of the shaft encoder 5 passes through the encoder cover 10 and is embedded in the encoder cover 10.

[0028] In this embodiment, a hole is made in the rear end cover 2 of the servo motor, and the encoder connecting shaft 1 is inserted into the housing of the servo motor and coaxially connected to the rear end of the servo motor's rotating shaft 3, so that when the rotating shaft 3 rotates, the encoder connecting shaft 1 rotates synchronously. Then, a hollow shaft encoder 4 and a shaft encoder 5 are respectively installed on the encoder connecting shaft 1, wherein the inner ring of the hollow shaft encoder 4 is connected to the encoder connecting shaft 1, and the shaft of the shaft encoder 5 is coaxially connected to the rear end of the encoder connecting shaft 1. When the encoder connecting shaft 1 rotates, the inner ring of the hollow shaft encoder 4 and the shaft of the shaft encoder 5 rotate together with the rotating shaft 3 of the servo motor, realizing the measurement of the magnetic pole position, rotation angle, and speed of the servo motor. The servo motor adopts a dual encoder structure, which can effectively improve the response speed of the servo system and eliminate static errors.

[0029] In this embodiment, both the hollow shaft encoder 4 and the shaft encoder 5 can be detachably connected to the encoder connecting shaft 1. In addition to using dual encoders, the servo motor can also selectively install either the hollow shaft encoder 4 or the shaft encoder 5 as needed.

[0030] In this embodiment, the outer ring of the hollow shaft encoder 4 is detachably connected to the rear end cover 2 of the servo motor, such as... Figure 1 As shown, the hollow shaft encoder 4 has an outward flange on its outer ring, and the outward flange is connected to the rear end cover 2 by multiple bolts. The main body of the shaft encoder 5 is embedded in the encoder cover 10, and the encoder cover 10 has an outward flange, which is connected to the rear end cover 2 by multiple bolts.

[0031] In this embodiment, the hollow shaft encoder 4 and the shaft encoder 5 can be, but are not limited to, rotary transformers, incremental encoders and absolute encoders.

[0032] Preferably, in another embodiment of this utility model, the encoder connecting shaft 1 is provided with a positioning ring 7, which abuts against the rear end of the servo motor shaft 3. The encoder connecting shaft 1 has an external thread, and a nut 8 is threadedly installed thereon. The nut 8 and the positioning ring 7 form a clamping position corresponding to the inner ring of the hollow shaft encoder 4. The rear end of the encoder connecting shaft 1 is coaxially provided with a positioning hole 9, and the shaft of the shaft encoder 5 is coaxially embedded in the positioning hole 9.

[0033] In this embodiment, when installing the encoder on the servo motor, the encoder cover 10 is removed beforehand. The threaded shaft 6 at the front end of the encoder connecting shaft 1 is threaded into the threaded hole at the rear end of the rotating shaft 3 until the positioning ring 7 abuts against the rear end of the rotating shaft 3, thus completing the connection between the encoder connecting shaft 1 and the rotating shaft 3. Then, the inner ring of the hollow shaft encoder 4 is fitted onto the encoder connecting shaft 1, with the front end of the inner ring abutting against the positioning ring 7. After connecting the outer flange of the hollow shaft encoder 4 to the rear end cover 2 with bolts, the nut 8 is threaded onto the encoder connecting shaft 1 and tightened until it abuts against the rear end of the inner ring, thus fixing the hollow shaft encoder 4 onto the encoder connecting shaft 1. Then, the shaft of the shaft encoder 5 is coaxially embedded in the positioning hole 9 at the rear end of the encoder connecting shaft 1. At this time, the outer flange on the encoder cover 10 abuts against the rear end cover 2 of the servo motor. After connecting the two with multiple bolts, the connection between the shaft of the shaft encoder 5 and the encoder connecting shaft 1 is completed.

[0034] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and embodiments shown and described herein.

Claims

1. A dual encoder mounting structure, mounted on a servo motor, characterized in that, include: The encoder connecting shaft has its front end passing through the rear end cover of the servo motor and coaxially connected to the rear end of the servo motor's rotating shaft. A hollow shaft encoder, wherein the inner ring is detachably coaxially sleeved on the encoder connecting shaft, and the outer ring is detachably connected to the rear end cover of the servo motor. A shaft encoder, the shaft of which is detachably coaxially connected to the rear end of the encoder connecting shaft, and its main body is detachably connected to the rear end cover of the servo motor via a connector.

2. The dual encoder mounting structure as described in claim 1, characterized in that, The encoder connecting shaft has a threaded shaft coaxially at its front end, and the servo motor shaft has a threaded hole coaxially at its rear end, with the threaded shaft threadedly installed in the threaded hole.

3. The dual encoder mounting structure as described in claim 2, characterized in that, The encoder connecting shaft is provided with a positioning ring, which abuts against the rear end of the servo motor shaft.

4. The dual encoder mounting structure as described in claim 3, characterized in that, The encoder connecting shaft has an external thread and a nut is threadedly installed thereon. The nut and the positioning ring form a clamping position corresponding to the inner ring of the hollow shaft encoder.

5. The dual encoder mounting structure as described in claim 2, characterized in that, The encoder connecting shaft has a positioning hole coaxially at its rear end, and the shaft of the shaft encoder is coaxially embedded in the positioning hole.

6. The dual encoder mounting structure as described in claim 2, characterized in that, The connector is an encoder housing, which is installed on the rear end cover of the servo motor. The encoder connecting shaft and the hollow shaft encoder are both located inside the encoder housing. The main body of the shaft encoder passes through the encoder housing and is embedded inside the encoder housing.

7. A servo motor, characterized in that, Includes the dual encoder mounting structure as described in any one of claims 1-6.

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