Rotation position sensor

Abstract

The utility model provides a rotary position sensor, which belongs to the technical field of position sensors and comprises a sensor stator, a bearing seat is fixedly mounted in the sensor stator, a shaft sleeve is rotatably mounted in the bearing seat, an internal spline is arranged in the shaft sleeve, a sensor rotor is arranged on the outer side of one end of the shaft sleeve, and a rotating shaft is arranged in the sensor rotor. The sensor rotor is connected with the shaft sleeve through the connecting mechanism; and the fixing mechanism is arranged on the outer side of the sensor stator. According to the utility model, the sensor stator and the sensor rotor are connected by adopting an assembled structure, so that the sensor stator and the sensor rotor can be simultaneously mounted on the motor, the mounting process is greatly simplified, the working efficiency is improved, the modular design enables the mounting process to be more visual and convenient, the technical requirements on operators are reduced, and the cost is reduced. When the sensor rotor needs to be separately repaired or replaced, the assembly type structure allows the sensor rotor to be separately disassembled.

Description

Technical Field

[0001] The utility model belongs to the technical field of position sensors, and particularly relates to a rotary position sensor. Background Art

[0002] With the continuous development of motor technology and the expansion of application fields, the importance of motor rotor position detection has become increasingly prominent. Motor rotor position detection is one of the key technologies for achieving precise control, optimizing performance, and ensuring safe operation of motors. As the core component for realizing this technology, the performance and application range of position sensors directly affect the overall performance of motors.

[0003] If traditional rotary position sensors adopt a non-assembled structure design, the installation and disassembly processes may become complex and time-consuming. This not only increases the installation difficulty but also raises the technical requirements for operators, which may lead to installation errors or low efficiency. At the same time, the sensor cannot be quickly repaired or replaced when a fault occurs, thus affecting the normal operation of the entire system. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a rotary position sensor, aiming to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A rotary position sensor includes a sensor stator, a bearing seat is fixedly installed inside the sensor stator, a shaft sleeve is rotatably installed inside the bearing seat, an internal spline is arranged inside the shaft sleeve, a sensor rotor is arranged on the outer side of one end of the shaft sleeve, and further includes:

[0007] A connecting mechanism, the sensor rotor is connected to the shaft sleeve through the connecting mechanism;

[0008] A fixing mechanism, the fixing mechanism is arranged on the outer side of the sensor stator.

[0009] As a preferred scheme of the utility model, the shaft sleeve is clamped with the external spline of the motor rotating shaft through the internal spline, and the sensor stator is fixedly connected to the motor through the fixing mechanism.

[0010] As a preferred scheme of the utility model, the length of the shaft sleeve is slightly longer than that of the bearing seat, and one end extends to the outside of the sensor stator.

[0011] As a preferred scheme of the utility model, the connecting mechanism includes a block fixedly installed inside the sensor rotor, and further includes a slot opened on the outer side of the shaft sleeve, and the block is slidably installed in the slot.

[0012] As a preferred solution of the present utility model, the connecting mechanism further includes a limiting block fixedly installed on the outer side of the bushing, and the sensor rotor is fixedly connected to the limiting block by screws.

[0013] As a preferred solution of the present utility model, the fixing mechanism includes a through hole opened on the surface of the sensor stator, a screw rod is inserted into the through hole, and a pressing piece and a spring are respectively arranged on the outer side of the screw rod.

[0014] As a preferred solution of the present utility model, the spring is located between the sensor stator and the pressing piece, the pressing piece is threadedly connected to the screw rod, and the end of the screw rod is threadedly connected to a threaded hole on the motor.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. For this rotary position sensor, an assembled structure is adopted for connecting the sensor stator and the sensor rotor, so that they can be installed on the motor simultaneously, greatly simplifying the installation process, improving work efficiency. This modular design makes the installation process more intuitive and convenient, and reduces the technical requirements for operators.

[0017] 2. For this rotary position sensor, when it is necessary to perform separate maintenance or replacement on the sensor rotor, the assembled structure allows the sensor rotor to be disassembled separately without disassembling the entire sensor. This not only saves maintenance time but also reduces maintenance costs because only the problematic components need to be replaced or repaired instead of the entire sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0019] Figure 1 is the overall structure schematic diagram of the present utility model;

[0020] Figure 2 is the overall structure exploded view of the present utility model;

[0021] Figure 3 is the partial structure cross-sectional view of the present utility model;

[0022] Figure 4 is the structure schematic diagram of the sensor stator of the present utility model;

[0023] Figure 5Schematic diagram of the partial structure of the fixing mechanism of the present utility model.

[0024] In the figure: 1, sensor stator; 2, bearing seat; 3, bushing; 4, connecting mechanism; 401, clamping block; 402, clamping groove; 403, limiting block; 5, fixing mechanism; 501, through hole; 502, screw; 503, pressing piece; 504, spring; 6, internal spline; 7, sensor rotor. Specific embodiments

[0025] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings of the specification.

[0026] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0027] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present utility model. The "in one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it an embodiment that is separate or selectively mutually exclusive with other embodiments.

[0028] Embodiment 1

[0029] Referring to the figure, please refer to Figures 1-5 , which is the first embodiment of the present utility model. This embodiment provides a rotational position sensor, including a sensor stator 1, a bearing seat 2 is fixedly installed inside the sensor stator 1, a bushing 3 is rotatably installed inside the bearing seat 2, an internal spline 6 is arranged inside the bushing 3, a sensor rotor 7 is arranged on the outer side of one end of the bushing 3, and further includes:

[0030] A connecting mechanism 4, and the sensor rotor 7 is connected to the bushing 3 through the connecting mechanism 4;

[0031] A fixing mechanism 5, and the fixing mechanism 5 is arranged on the outer side of the sensor stator 1.

[0032] Specifically, the bushing 3 is clamped with the external spline of the motor rotating shaft through the internal spline 6, the sensor stator 1 is fixedly connected to the motor through the fixing mechanism 5, the length of the bushing 3 is slightly longer than that of the bearing seat 2, and one end extends to the outside of the sensor stator 1.

[0033] Furthermore, the sensor stator 1 is the main body part of the sensor. Inside it, a bearing seat 2 is fixedly installed. The sensor stator 1 can support the bearing seat 2 to ensure that the shaft sleeve 3 and the sensor rotor 7 can rotate stably. The bearing seat 2 is used to fix the shaft sleeve 3 and reduce the friction during its rotation, ensuring the smoothness and accuracy of rotation. The shaft sleeve 3 is a rotatable cylindrical component used to connect the motor shaft and the sensor rotor 7. The shaft sleeve 3 is clamped with the external spline of the motor shaft through the internal spline 6, achieving synchronous rotation with the motor shaft and ensuring that the sensor rotor 7 can accurately reflect the rotation position of the motor shaft. The connecting mechanism 4 is used to connect the sensor rotor 7 and the shaft sleeve 3 to ensure their synchronous rotation. The fixing mechanism 5 is used to fixedly connect the sensor stator 1 and the motor to ensure the stability of the sensor during the operation of the motor.

[0034] Specifically, the connecting mechanism 4 includes a clamping block 401 fixedly installed inside the sensor rotor 7, and also includes a clamping groove 402 opened on the outer side of the shaft sleeve 3. The clamping block 401 is slidably installed in the clamping groove 402. The connecting mechanism 4 further includes a limiting block 403 fixedly installed on the outer side of the shaft sleeve 3. The sensor rotor 7 is fixedly connected to the limiting block 403 through screws.

[0035] Furthermore, the clamping block 401 being slidably installed in the clamping groove 402 realizes the connection between the sensor rotor 7 and the shaft sleeve 3; the limiting block 403 and the screws further fix this connection.

[0036] Specifically, the fixing mechanism 5 includes a through hole 501 opened on the surface of the sensor stator 1. A screw rod 502 is inserted into the through hole 501. On the outer side of the screw rod 502, a pressing piece 503 and a spring 504 are respectively arranged. The spring 504 is located between the sensor stator 1 and the pressing piece 503. The pressing piece 503 is threadedly connected to the screw rod 502. The end of the screw rod 502 is threadedly connected to a threaded hole on the motor.

[0037] Furthermore, the through hole 501 is used to insert the screw rod 502 to realize the fixed connection between the sensor stator 1 and the motor. The screw rod 502 is inserted through the through hole 501 and extends into the threaded hole on the motor. As the main component of the connection, by rotating the screw rod 502, the pressing piece 503 can press the motor and the spring 504. The spring 504 is located between the sensor stator 1 and the pressing piece 503, playing a role of buffering and maintaining the pressing force.

[0038] Working principle:

[0039] In use, the bushing 3 is installed inside the sensor stator 1 through the bearing housing 2 to ensure that the bushing 3 can rotate smoothly. The sensor rotor 7 is connected to the bushing 3 through the connecting mechanism 4 to ensure that the locking block 401 can slide smoothly in the card slot 402, and the limiting block 403 is fixed to the sensor rotor 7 with screws. The motor shaft is clamped with the internal spline 6 of the bushing 3 to ensure the synchronous rotation of the motor shaft and the bushing 3. Subsequently, the sensor stator 1 is fixed to the motor through the fixing mechanism 5. When the screw 502 is inserted into the through hole 501 and connected to the threaded hole on the motor, by rotating the screw 502, the pressing piece 503 can be pushed to move towards the motor direction. The movement of the pressing piece 503 will compress the spring 504 and generate a pressing force on the motor surface at the same time, thus realizing the tight fixation of the sensor stator 1 and the motor.

[0040] To sum up: The bushing 3 is clamped with the external spline of the motor shaft through the internal spline 6, realizing the precise synchronous rotation with the motor shaft. This connection method ensures that the sensor rotor 7 can accurately reflect the rotation position of the motor shaft, providing high-precision position information for the control system. The connecting mechanism 4 ensures the stable connection between the sensor rotor 7 and the bushing 3 through the sliding fit of the locking block 401 and the card slot 402, as well as the fixation of the limiting block 403 and the screws. This design not only simplifies the installation process but also improves the reliability and durability of the connection. The spring 504 in the fixing mechanism 5 plays a role of buffering and shock absorption between the sensor stator 1 and the motor. When the vibration and impact generated during the operation of the motor are absorbed by the spring 504, the direct impact on the sensor is reduced, thereby improving the service life and stability of the sensor.

Claims

1. A rotary position sensor, characterized in that: The invention comprises a sensor stator (1), a bearing seat (2) is fixedly mounted inside the sensor stator (1), a shaft sleeve (3) is rotatably mounted inside the bearing seat (2), an internal spline (6) is arranged inside the shaft sleeve (3), a sensor rotor (7) is arranged outside one end of the shaft sleeve (3), and further comprises: A connecting mechanism (4), wherein the sensor rotor (7) is connected to the shaft sleeve (3) via the connecting mechanism (4); A fixing mechanism (5), wherein the fixing mechanism (5) is arranged on the outside of the sensor stator (1).

2. A rotation position sensor according to claim 1, characterized in that: The shaft sleeve (3) is clamped with the external splines of the motor shaft via internal splines (6), and the sensor stator (1) is fixedly connected to the motor via a fixing mechanism (5).

3. A rotation position sensor according to claim 1, characterized in that: The length of the shaft sleeve (3) is slightly longer than the bearing seat (2), and one end thereof extends to the outside of the sensor stator (1).

4. A rotation position sensor according to claim 1, characterized in that: The connection mechanism (4) comprises a clamping block (401) fixedly mounted inside the sensor rotor (7), and also comprises a clamping groove (402) opened on the outside of the shaft sleeve (3), and the clamping block (401) is slidably mounted in the clamping groove (402).

5. A rotation position sensor according to claim 1, characterized in that: The connection mechanism (4) further comprises a limit block (403) fixedly mounted on the outside of the shaft sleeve (3), and the sensor rotor (7) is fixedly connected to the limit block (403) via screws.

6. A rotation position sensor according to claim 1, characterized in that: The fixing mechanism (5) comprises a through hole (501) opened on the surface of the sensor stator (1), a screw rod (502) is inserted into the through hole (501), and a pressing sheet (503) and a spring (504) are respectively arranged on the outside of the screw rod (502).

7. A rotation position sensor according to claim 6, characterized in that: The spring (504) is located between the sensor stator (1) and the clamping plate (503), the clamping plate (503) is threadedly connected to the screw rod (502), and the end of the screw rod (502) is threadedly connected to the threaded hole on the motor.

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