Anti-interference position sensor

Abstract

The utility model provides an anti-interference position sensor, which belongs to the technical field of sensors and comprises a shielding shell, a shielding cover is arranged at one end of the shielding shell, shielding layers are arranged on the inner walls of the shielding shell and the shielding cover, and a sensor stator and a sensor rotor are arranged in the shielding shell. The sealing mechanism is arranged at the end part of the shielding cover and is used for enhancing the connection sealing performance of the shielding shell and the shielding cover; and a fixing mechanism. According to the utility model, through the complete shielding structure formed by the shielding shell, the shielding cover and the shielding layer and the reflection and absorption of the shielding layer on electromagnetic waves, the influence of external electromagnetic interference on internal elements of the sensor is significantly reduced, and the accuracy and stability of the sensor in a complex electromagnetic environment are ensured; external dust, moisture and other impurities are effectively prevented from entering, elements in the sensor are protected, and the service life of the sensor is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and in particular relates to an anti-interference type position sensor. Background Art

[0002] With the continuous development of motor technology and the expansion of its application fields, the importance of motor rotor position detection has become increasingly prominent. Motor rotor position detection is one of the key technologies to achieve precise motor control, optimize performance and ensure safe operation. Position sensors are the core components to achieve this technology, and their performance and application range directly affect the overall performance of the motor.

[0003] Existing position sensors are easily affected by external electromagnetic interference in complex electromagnetic environments, resulting in inaccurate sensor output signals, which in turn affects the accuracy and stability of position detection. In high-precision position detection applications such as industrial automation and robot control, electromagnetic interference may cause serious production errors or safety accidents. In addition, existing position sensors have poor sealing performance, and external impurities such as dust and moisture can easily enter the sensor, causing damage to internal components or performance degradation, shortening the sensor's service life. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-interference type position sensor, aiming to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An anti-interference position sensor comprises a shielding shell, a shielding cover is arranged at one end of the shielding shell, shielding layers are arranged on the inner walls of the shielding shell and the shielding cover, and a sensor stator and a sensor rotor are arranged inside the shielding shell;

[0007] A sealing mechanism, which is arranged at the end of the shielding cover and is used to enhance the sealing performance of the connection between the shielding shell and the shielding cover;

[0008] The fixing mechanism is arranged inside the shielding shell and is used to fix the sensor stator.

[0009] As a preferred solution of the utility model, a fixing ring is fixedly installed at one end of the shielding shell, a fixing hole is opened on the surface of the fixing ring, and the shielding shell is fixedly connected to the motor by screws penetrating the fixing hole.

[0010] As a preferred solution of the utility model, the sealing mechanism includes a clamping ring fixedly connected to one end of the shielding cover, a mounting groove is provided on the outer side of the clamping ring, and a sealing ring is sleeved inside the mounting groove.

[0011] As a preferred solution of the utility model, the clamping ring is inserted into the interior of the shielding shell, and the sealing ring is located between the clamping ring and the shielding shell.

[0012] As a preferred solution of the utility model, threaded holes are provided at the end of the shielding shell and the surface of the shielding cover, bolts are connected to the internal threads of the threaded holes, and the shielding shell and the shielding cover are fixedly connected by the bolts.

[0013] As a preferred solution of the utility model, the fixing mechanism includes a support rod fixedly installed on the inner wall of the shielding shell, a baffle is fixedly installed on the end of the support rod, an insertion rod is fixedly installed on the end of the baffle, a spring is sleeved on the outer side of the insertion rod, the insertion rod passes through the sensor stator, and a nut is threadedly connected to the end of the insertion rod.

[0014] As a preferred solution of the utility model, a through hole is opened in the center of the shielding shell and the shielding cover, a sealed bearing is fixedly installed inside the through hole, and the motor shaft passes through the shielding shell and the shielding cover through the sealed bearing, and the sensor rotor is clamped with the motor shaft through an internal spline.

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

[0016] 1. This anti-interference position sensor significantly reduces the impact of external electromagnetic interference on the internal components of the sensor through the complete shielding structure composed of the shielding shell, shielding cover and shielding layer, as well as the reflection and absorption of electromagnetic waves by the shielding layer, ensuring the accuracy and stability of the sensor in complex electromagnetic environments.

[0017] 2. This anti-interference position sensor effectively prevents the entry of external impurities such as dust and moisture through the design of sealing mechanism and sealed bearing, protects the internal components of the sensor, and extends the service life of the 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 is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

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

[0020] Figure 2 It is a schematic diagram of the disassembly of the shielding shell and the shielding cover of the utility model;

[0021] Figure 3This is a schematic diagram of the internal structure of the shielding shell of the utility model;

[0022] Figure 4 It is an exploded view of the local structure of the utility model;

[0023] Figure 5 It is a schematic diagram of the partial structure of the fixing mechanism of the utility model.

[0024] In the figure: 1. shielding shell; 2. shielding cover; 3. shielding layer; 4. sealing mechanism; 401. retaining ring; 402. mounting groove; 403. sealing ring; 5. sensor stator; 6. sensor rotor; 7. fixing mechanism; 701. support rod; 702. baffle; 703. plug rod; 704. spring; 705. nut; 8. fixing ring; 9. fixing hole; 10. threaded hole; 11. bolt; 12. through hole; 13. sealed bearing. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Example 1

[0029] Refer to the figure Figure 1-5 , which is the first embodiment of the utility model, and provides an anti-interference type position sensor, comprising a shielding shell 1, a shielding cover 2 is arranged at one end of the shielding shell 1, a shielding layer 3 is arranged on the inner wall of the shielding shell 1 and the shielding cover 2, and a sensor stator 5 and a sensor rotor 6 are arranged inside the shielding shell 1;

[0030] A sealing mechanism 4, which is arranged at the end of the shielding cover 2 and is used to enhance the sealing performance of the connection between the shielding shell 1 and the shielding cover 2;

[0031] The fixing mechanism 7 is arranged inside the shielding shell 1 and is used to fix the sensor stator 5 .

[0032] Specifically, a fixing ring 8 is fixedly mounted on one end of the shielding shell 1 , a fixing hole 9 is opened on the surface of the fixing ring 8 , and the shielding shell 1 is fixedly connected to the motor by screws penetrating the fixing hole 9 .

[0033] Furthermore: the shielding shell 1 and the shielding cover 2 together constitute a complete shielding structure, further reducing electromagnetic interference. The shielding layer 3 is made of conductive material, and is used to further reflect and absorb electromagnetic waves entering the shielding shell 1 and the shielding cover 2, reducing electromagnetic interference and significantly improving the anti-interference ability of the sensor. The sealing mechanism 4 can prevent external impurities such as dust and moisture from entering the sensor and protect internal components. The fixing mechanism 7 ensures that the sensor stator 5 will not be displaced or vibrated during operation, thereby ensuring the accuracy of the measurement. The sensor stator 5 is an important component of the position sensor and cooperates with the sensor rotor 6 to detect position changes.

[0034] Specifically, the sealing mechanism 4 includes a clamping ring 401 fixedly connected to one end of the shielding cover 2, a mounting groove 402 is provided on the outer side of the clamping ring 401, a sealing ring 403 is sleeved inside the mounting groove 402, the clamping ring 401 is inserted into the inside of the shielding shell 1, and the sealing ring 403 is located between the clamping ring 401 and the shielding shell 1.

[0035] Furthermore: the sealing mechanism 4 realizes the sealing between the shielding shell 1 and the shielding cover 2 through the clamping ring 401 and the sealing ring 403. The clamping ring 401 can be tightly inserted into the interior of the shielding shell 1 and fit with the inner wall of the shielding shell 1. When the clamping ring 401 is inserted into the interior of the shielding shell 1, the sealing ring 403 is compressed between the clamping ring 401 and the shielding shell 1 to form a tight sealing layer to prevent the entry of external impurities.

[0036] Specifically, threaded holes 10 are provided at the end of the shielding shell 1 and the surface of the shielding cover 2 . Bolts 11 are threadedly connected inside the threaded holes 10 . The shielding shell 1 and the shielding cover 2 are fixedly connected by the bolts 11 .

[0037] Furthermore, the threaded hole 10 and the bolt 11 are engaged with each other through threads. When the bolt 11 rotates, it moves forward or backward along the thread direction of the threaded hole 10, thereby achieving a tight connection between the two.

[0038] Specifically, the fixing mechanism 7 includes a support rod 701 fixedly installed on the inner wall of the shielding shell 1, a baffle 702 is fixedly installed on the end of the support rod 701, an insertion rod 703 is fixedly installed on the end of the baffle 702, a spring 704 is sleeved on the outer side of the insertion rod 703, the insertion rod 703 passes through the sensor stator 5, and a nut 705 is threadedly connected to the end of the insertion rod 703.

[0039] Furthermore: the support rod 701 provides a stable supporting foundation for the sensor stator 5 through its solid structure and close connection with the shielding shell 1. The insertion rod 703 forms a tight fixed connection by cooperating with the hole position of the sensor stator 5. The length and diameter design of the insertion rod 703 ensures that it matches the hole position of the sensor stator 5, thereby achieving a stable fixing effect. When the insertion rod 703 is inserted into the sensor stator 5, the spring 704 will be compressed and generate a certain elastic force. This elastic force can ensure the close contact between the insertion rod 703 and the sensor stator 5 to prevent loosening or falling off. At the same time, the spring 704 can also provide a certain buffering effect to reduce the impact of vibration and impact on the sensor stator 5. By rotating the nut 705, its position on the insertion rod 703 can be adjusted, thereby changing the compression degree of the spring 704, and then adjusting the clamping force of the insertion rod 703 on the sensor stator 5.

[0040] Specifically, a through hole 12 is opened in the center of the shielding shell 1 and the shielding cover 2, a sealed bearing 13 is fixedly installed inside the through hole 12, and the motor shaft passes through the shielding shell 1 and the shielding cover 2 through the sealed bearing 13, and the sensor rotor 6 is clamped with the motor shaft through the internal spline.

[0041] Furthermore: the through hole 12 is located at the center of the shielding shell 1 and the shielding cover 2, and is used to allow the motor shaft to pass through, ensuring that the motor shaft can drive the sensor rotor 6 to rotate. The design of the sealed bearing 13 can prevent external impurities such as dust and moisture from entering the interior of the shielding shell 1 to protect internal components. The sensor rotor 6 is connected to the motor shaft through an internal spline to ensure a stable connection and synchronous rotation between the two.

[0042] Working principle:

[0043] When in use, first place the sensor stator 5 accurately inside the shielding shell 1, and pass the rod 703 of the fixing mechanism 7 through its fixing hole; then, adjust the pressing force of the rod 703 by rotating the nut 705 to ensure that the sensor stator 5 is firmly installed in the shielding shell 1 to avoid any displacement or vibration; then, pass the motor shaft through the central through hole 12 of the sealing bearing 13 to ensure that the motor shaft can rotate smoothly and has good sealing performance. Next, the sensor rotor 6 is tightly clamped with the motor shaft through the internal spline to ensure stable connection and synchronous rotation between the two; at the same time, the sealing ring 403 is accurately mounted on the mounting of the retaining ring 401 The inside of the groove 402 ensures that the sealing ring 403 can fit tightly and play a sealing role. After that, the shielding cover 2 is accurately aligned with the shielding shell 1 to ensure the sealing between the two; then, the retaining ring 401 with the sealing ring 403 is inserted into the inside of the shielding shell 1, and ensure that the sealing ring 403 is tightly located between the retaining ring 401 and the shielding shell 1 to form an effective sealing layer, and the shielding cover 2 and the shielding shell 1 are fixed by bolts 11. Finally, the shielding structure composed of the shielding shell 1, the shielding cover 2 and the shielding layer 3, as well as the sealing design of the sealing mechanism 4 and the sealing bearing 13 provide powerful anti-electromagnetic interference and dustproof and waterproof protection for the entire sensor.

[0044] To sum up: the complete shielding structure formed by the shielding shell 1, the shielding cover 2 and the shielding layer 3, and the reflection and absorption of electromagnetic waves by the shielding layer 3 significantly reduce the impact of external electromagnetic interference on the internal components of the sensor, thereby ensuring the accuracy and stability of the sensor in a complex electromagnetic environment. The design of the sealing mechanism 4 and the sealing bearing 13 effectively prevents the entry of external impurities such as dust and moisture, thereby protecting the internal components of the sensor and extending the service life of the sensor.

Claims

1. An anti-interference position sensor, characterized in that: The invention comprises a shielding shell (1), a shielding cover (2) being arranged at one end of the shielding shell (1), shielding layers (3) being arranged on the inner walls of the shielding shell (1) and the shielding cover (2), and a sensor stator (5) and a sensor rotor (6) being arranged inside the shielding shell (1); A sealing mechanism (4), the sealing mechanism (4) being arranged at the end of the shielding cover (2) and being used to enhance the sealing performance of the connection between the shielding shell (1) and the shielding cover (2); A fixing mechanism (7), wherein the fixing mechanism (7) is arranged inside the shielding shell (1) and is used to fix the sensor stator (5).

2. The anti-interference position sensor according to claim 1, characterized in that: A fixing ring (8) is fixedly mounted on one end of the shielding shell (1), a fixing hole (9) is provided on the surface of the fixing ring (8), and the shielding shell (1) is fixedly connected to the motor via screws penetrating the fixing hole (9).

3. The anti-interference position sensor according to claim 1, characterized in that: The sealing mechanism (4) comprises a clamping ring (401) fixedly connected to one end of the shielding cover (2), a mounting groove (402) is provided on the outer side of the clamping ring (401), and a sealing ring (403) is sleeved inside the mounting groove (402).

4. The anti-interference position sensor according to claim 3, characterized in that: The clamping ring (401) is inserted into the interior of the shielding shell (1), and the sealing ring (403) is located between the clamping ring (401) and the shielding shell (1).

5. The anti-interference position sensor according to claim 1, characterized in that: The end of the shielding shell (1) and the surface of the shielding cover (2) are both provided with threaded holes (10), the internal threads of the threaded holes (10) are connected with bolts (11), and the shielding shell (1) and the shielding cover (2) are fixedly connected by the bolts (11).

6. The anti-interference position sensor according to claim 1, characterized in that: The fixing mechanism (7) comprises a support rod (701) fixedly mounted on the inner wall of the shielding shell (1); a baffle (702) is fixedly mounted on the end of the support rod (701); an insertion rod (703) is fixedly mounted on the end of the baffle (702); a spring (704) is sleeved on the outer side of the insertion rod (703); the insertion rod (703) passes through the sensor stator (5); and a nut (705) is threadedly connected to the end of the insertion rod (703).

7. The anti-interference position sensor according to claim 1, characterized in that: A through hole (12) is provided at the center of the shielding shell (1) and the shielding cover (2), a sealed bearing (13) is fixedly installed inside the through hole (12), and the motor shaft passes through the shielding shell (1) and the shielding cover (2) through the sealed bearing (13), and the sensor rotor (6) is clamped with the motor shaft through an internal spline.

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