Electric induction type angle sensor

Abstract

The utility model discloses an electric induction type angle sensor which comprises an outer fixing ring, an inner fixing ring, a first stator, a second stator, a rotor and an elastic clamp. The inner fixing ring is arranged on the inner side of the outer fixing ring; the first stator is in a circular ring shape, and the first stator is arranged at the upper end of the inner fixing ring; the second stator is in a circular ring shape, the second stator is arranged at the lower end of the inner fixing ring, and the second stator is electrically connected with the first stator; the rotor comprises a rotating ring part and a rotating cylinder part, the rotating ring part is arranged between the first stator and the second stator, and the two ends of the rotating cylinder part extend out of the middle of the first stator and the middle of the second stator respectively; the elastic clamp is arranged on the outer side wall of the inner fixing ring, the upper end of the elastic clamp abuts against the first stator, and the lower end of the elastic clamp abuts against the second stator.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to an inductive angle sensor. Background Art

[0002] The working principle of an angle sensor is based on a sensitive element to sense the position change of a rotating bearing, and principles such as capacitance, inductance, Hall effect, and photoelectric effect are used for measurement. When rotation occurs, the signal detected by the sensitive element also changes, and finally it is output in the form of a digital or analog signal. Angle sensors are widely used, including but not limited to fields such as geography, civil use, and industry.

[0003] An angle sensor mainly includes two parts: a stator and a rotor. The measurement method is to install the rotor on the measured rotating part and the stator on the fixed part. The rotation of the measured moving part drives the rotor to move, and the rotation angle of the measured moving part is reflected in the rotation angle of the rotor relative to the stator.

[0004] In the prior art, the stator usually includes a first stator and a second stator, and the rotor is installed between the first stator and the second stator. However, in the existing angle sensors, the stator is inconvenient to disassemble, resulting in great inconvenience when installing the rotor and the stator, which is not conducive to improving the assembly efficiency. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide an inductive angle sensor to solve the technical problem of low assembly efficiency existing in the prior art.

[0006] The utility model is realized by adopting the following technical scheme: an inductive angle sensor, including an outer fixing ring, an inner fixing ring, a first stator, a second stator, a rotor, and an elastic clip;

[0007] The inner fixing ring is arranged inside the outer fixing ring;

[0008] The first stator is in a circular ring shape and is arranged at the upper end of the inner fixing ring;

[0009] The second stator is in a circular ring shape and is arranged at the lower end of the inner fixing ring, and the second stator is electrically connected to the first stator;

[0010] The rotor includes a rotating ring part and a rotating cylinder part. The rotating ring part is arranged between the first stator and the second stator, and both ends of the rotating cylinder part extend out from the middle parts of the first stator and the second stator respectively;

[0011] The elastic clip is arranged on the outer side wall of the inner fixing ring. The upper end of the elastic clip abuts against the first stator, and the lower end of the elastic clip abuts against the second stator.

[0012] In a possible implementation, an upper clamping area is provided on the upper surface of the first stator, a lower clamping area is provided on the lower surface of the second stator, the upper end of the elastic clip abuts against the upper clamping area, and the lower end of the elastic clip abuts against the lower clamping area.

[0013] In a possible implementation, a first avoidance groove is provided on the inner side wall of the outer fixing ring, and the elastic clip is located in the first avoidance groove.

[0014] In a possible implementation, the first stator and the second stator are connected by a flexible flat cable.

[0015] In a possible implementation, a second avoidance groove is provided on the inner side wall of the outer fixing ring, and the flexible flat cable is located in the second avoidance groove.

[0016] In a possible implementation, a first limiting protrusion is provided at the upper end of the inner side wall of the inner fixing ring, and a first limiting groove corresponding to the first limiting protrusion is provided on the outer side wall of the first stator.

[0017] In a possible implementation, a second limiting protrusion is provided at the lower end of the inner side wall of the inner fixing ring, and a second limiting groove corresponding to the second limiting protrusion is provided on the outer side wall of the second stator.

[0018] In a possible implementation, a clamping groove is provided on the inner side wall of the rotating cylinder part, and the clamping groove is used to connect an external rotating part.

[0019] In a possible implementation, a first connecting part is provided on the outer side wall of the inner fixing ring, a second connecting part corresponding to the first connecting part is provided on the outer side wall of the outer fixing ring, and the first connecting part and the second connecting part are connected by a fastening bolt.

[0020] In a possible implementation, a third connecting part is further provided on the outer side wall of the outer fixing ring, and the third connecting part is used to connect an external fixing part.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows: The outer fixing ring is used to connect an external fixing part, the rotor is used to connect an external rotating part, the inner fixing ring and the outer fixing ring are fixedly connected, the inner fixing ring provides an installation basis for the first stator and the second stator, and provides a rotating space for the rotor. The elastic clip can fix the inner fixing ring, the first stator and the second stator together to improve the stability of the stator. When disassembling, only the outer fixing ring needs to be removed and then the elastic clip can be taken off, which is very convenient. Description of the Drawings

[0022] Figure 1Schematic structural diagram of the electric induction angle sensor of the present utility model;

[0023] Figure 2 Exploded schematic diagram of the electric induction angle sensor of the present utility model;

[0024] Figure 3 Schematic structural diagram of the electric induction angle sensor of the present utility model after hiding the outer fixing ring.

[0025] In the figure:

[0026] 100. Outer fixing ring; 101. First avoidance groove; 102. Second avoidance groove; 103. Second connecting portion; 104. Third connecting portion;

[0027] 200. Inner fixing ring; 201. First limiting protrusion; 202. Second limiting protrusion; 203. First connecting portion;

[0028] 300. First stator; 301. Upper clamping area; 302. First limiting groove;

[0029] 400. Second stator; 401. Lower clamping area; 402. Second limiting groove; 403. Flexible flat cable;

[0030] 500. Rotor; 501. Rotating ring portion; 502. Rotating cylinder portion; 503. Clamping groove;

[0031] 600. Elastic clip. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts shall fall within the protection scope of the present application.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0034] In addition, the descriptions involving "first", "second", etc. in this application are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0035] Such as Figures 1-3An inductive angle sensor shown in the figure includes an outer fixed ring 100, an inner fixed ring 200, a first stator 300, a second stator 400, a rotor 500 and an elastic clip 600; the inner fixed ring 200 is arranged inside the outer fixed ring 100; the first stator 300 is in a circular ring shape and is arranged at the upper end of the inner fixed ring 200; the second stator 400 is in a circular ring shape and is arranged at the lower end of the inner fixed ring 200, and the second stator 400 is electrically connected to the first stator 300; the rotor 500 includes a rotating ring part 501 and a rotating cylinder part 502, the rotating ring part 501 is arranged between the first stator 300 and the second stator 400, and both ends of the rotating cylinder part 502 extend out from the middle parts of the first stator 300 and the second stator 400 respectively; the elastic clip 600 is arranged on the outer side wall of the inner fixed ring 200, the upper end of the elastic clip 600 abuts against the first stator 300, and the lower end of the elastic clip 600 abuts against the second stator 400. It should be noted that during installation, it is necessary to ensure that the rotor 500, the first stator 300 and the second stator 400 are coaxially installed, the rotating ring part 501 of the rotor 500 is located between the first stator 300 and the second stator 400, and the rotating ring part 501 has a clearance fit with both the first stator 300 and the second stator 400 to ensure that the rotor 500 can rotate smoothly. The rotating cylinder part 502 is in a cylindrical shape, and both ends of the rotating cylinder part 502 extend out from the centers of the first stator 300 and the second stator 400. There is a first step at the upper end of the inner side wall of the inner fixed ring 200, and the first stator 300 is placed on the first step. There is a second step at the lower end of the inner side wall of the inner fixed ring 200, and the second stator 400 is placed on the second step. During assembly, only need to place the first stator 300 on the first step, then place the second stator 400 on the second step, and then use the elastic clip 600 to clamp the inner fixed ring 200, the first stator 300 and the second stator 400. And, the number of elastic clips 600 can be freely set according to actual needs. The outer fixed ring 100 is arranged outside the inner fixed ring 200, which can provide protection for the inner fixed ring 200 and the elastic clip 600 and ensure that the elastic clip 600 will not break away from the inner fixed ring 200, greatly improving the overall stability of the stator. When disassembling, only need to remove the outer fixed ring 100 first and then remove the elastic clip 600, which is very convenient.

[0036] Specifically, the first stator 300 is an electric field receiver, the second stator 400 is an electric field emitter, and a modulated electric field pattern is provided on the rotor 500. The stator emits an electric field signal to the rotor 500 and receives the returned signal for processing. When in use, the stator of the angle sensor is fixedly connected to the fixed axis of the measured object, and the rotor 500 of the angle sensor is fixedly connected to the moving axis. By rotating the rotor 500, the electric field of the stator is modulated regularly. Finally, the regularly changing electric field signal is converted into sine and cosine signals through the solving circuit on the stator, and then further solved into an angle digital quantity through the analog-to-digital conversion circuit, and is output using the corresponding communication protocol.

[0037] Please refer to Figure 2 and Figure 3 In a possible implementation, the upper surface of the first stator 300 is provided with an upper clamping area 301, and the lower surface of the second stator 400 is provided with a lower clamping area 401. The upper end of the elastic clip 600 abuts against the upper clamping area 301, and the lower end of the elastic clip 600 abuts against the lower clamping area 401. It should be noted that the settings of the upper clamping area 301 and the lower clamping area 401 can position the elastic clip 600. When the user installs the elastic clip 600, it only needs to be directly installed according to the positions of the upper clamping area 301 and the lower clamping area 401, which is beneficial to improving the installation efficiency of the elastic clip 600. Moreover, both the upper clamping area 301 and the lower clamping area 401 are slightly recessed inward to form a groove-like structure to limit the elastic clip 600 and prevent the elastic clip 600 from accidentally sliding.

[0038] Please refer to Figure 2 and Figure 3 In a possible implementation, a first avoidance groove 101 is provided on the inner side wall of the outer fixing ring 100, and the elastic clip 600 is located in the first avoidance groove 101. It is easy to understand that the elastic clip 600 is arranged on the outer side wall of the inner fixing ring 200, and the inner fixing ring 200 is arranged inside the outer fixing ring 100. Therefore, the setting of the first avoidance groove 101 can avoid the elastic clip 600 and enable the inner fixing ring 200 to smoothly enter the outer fixing ring 100. Moreover, the first avoidance groove 101 can also play a limiting role. The elastic clip 600 located in the first avoidance groove 101 can prevent the elastic clip 600 from shifting, which is beneficial to improving the overall structural stability of the stator.

[0039] Please refer to Figure 2 and Figure 3 In a possible implementation, the first stator 300 and the second stator 400 are connected by a flexible flat cable 403. It should be noted that the second stator 400 is provided with a wire for connecting an external component, and both the first stator 300 and the second stator 400 are provided with circuits. Therefore, the second stator 400 needs to be electrically connected to the first stator 300. The flexible flat cable 403 has the characteristics of miniaturization, small size, simple wiring, and excellent flexibility. Using the flexible flat cable 403 is beneficial to improving the service life of the sensor.

[0040] Please refer to Figure 2, in a possible implementation, a second avoidance groove 102 is provided on the inner side wall of the external fixing ring 100, and the flexible flat cable 403 is located in the second avoidance groove 102. It is easy to understand that the flexible flat cable 403 needs to pass through the outer side wall of the internal fixing ring 200 to connect the first stator 300 and the second stator 400, and the internal fixing ring 200 is arranged inside the external fixing ring 100. Therefore, the setting of the second avoidance groove 102 can play an avoidance role for the flexible flat cable 403, enabling the internal fixing ring 200 to smoothly enter the external fixing ring 100, and there is also a notch on the side wall of the internal fixing ring 200 to facilitate the passage of the flexible flat cable 403.

[0041] Please refer to Figure 2 , in a possible implementation, a first limiting protrusion 201 is provided at the upper end of the inner side wall of the internal fixing ring 200, and a first limiting groove 302 corresponding to the first limiting protrusion 201 is provided on the outer side wall of the first stator 300. It is easy to understand that since both the first stator 300 and the internal fixing ring 200 are circular rings, the first stator 300 is prone to accidental rotation. The cooperation of the first limiting protrusion 201 and the first limiting groove 302 can play a limiting role for the first stator 300, which is beneficial to improving the stability of the first stator 300.

[0042] Please refer to Figure 2 , in a possible implementation, a second limiting protrusion 202 is provided at the lower end of the inner side wall of the internal fixing ring 200, and a second limiting groove 402 corresponding to the second limiting protrusion 202 is provided on the outer side wall of the second stator 400. It is easy to understand that since the second stator 400 is circular, the second stator 400 is prone to accidental rotation. The cooperation of the second limiting protrusion 202 and the second limiting groove 402 can play a limiting role for the second stator 400, which is beneficial to improving the stability of the second stator 400.

[0043] Please refer to Figure 2 , in a possible implementation, a clamping groove 503 is provided on the inner side wall of the rotating cylinder portion 502, and the clamping groove 503 is used to connect an external rotating member. It is easy to understand that the rotor 500 needs to be connected to an external rotating member, and the setting of the clamping groove 503 can facilitate the connection between the rotor 500 and the external rotating member. It only needs the rotating shaft of the external rotating member to extend into the rotating cylinder portion 502 for clamping, which is beneficial to improving the installation efficiency of the rotor 500.

[0044] Please refer to Figure 1, in a possible implementation, a first connecting portion 203 is provided on the outer side wall of the internal fixing ring 200, and a second connecting portion 103 corresponding to the first connecting portion 203 is provided on the outer side wall of the external fixing ring 100. The first connecting portion 203 and the second connecting portion 103 are connected by a fastening bolt. It is easy to understand that through holes are provided on both the first connecting portion 203 and the second connecting portion 103, and the first connecting portion 203 and the second connecting portion 103 are connected by using the fastening bolt, so that the internal fixing ring 200 and the external fixing ring 100 are fixedly connected.

[0045] Please refer to Figure 1 , in a possible implementation, a third connecting portion 104 is further provided on the outer side wall of the external fixing ring 100, and the third connecting portion 104 is used to connect an external fixing member. It is easy to understand that a through hole is also provided on the third connecting portion 104, and the external fixing ring 100 is fixedly connected to the external fixing member through the third connecting portion 104.

[0046] The above-mentioned implementation is only the preferred implementation of the present utility model, and the protection scope of the present utility model cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present utility model fall within the protection scope required by the present utility model.

Claims

1. An electric inductive angle sensor, characterized in that: It includes an outer fixing ring, an inner fixing ring, a first stator, a second stator, a rotor and an elastic clip; The inner fixing ring is arranged on the inner side of the outer fixing ring; The first stator is in a circular ring shape and is arranged at the upper end of the inner fixing ring; The second stator is in a circular ring shape, is disposed at the lower end of the inner fixed ring, and is electrically connected to the first stator; The rotor comprises a rotating ring portion and a rotating drum portion, wherein the rotating ring portion is arranged between the first stator and the second stator, and two ends of the rotating drum portion extend from the middle of the first stator and the second stator respectively; The elastic clip is arranged on the outer side wall of the inner fixing ring, the upper end of the elastic clip abuts against the first stator, and the lower end of the elastic clip abuts against the second stator.

2. The electric inductive angle sensor according to claim 1, characterized in that: An upper clamping area is provided on the upper surface of the first stator, and a lower clamping area is provided on the lower surface of the second stator. The upper end of the elastic clip abuts against the upper clamping area, and the lower end of the elastic clip abuts against the lower clamping area.

3. The electric inductive angle sensor according to claim 1, characterized in that: A first avoidance groove is provided on the inner side wall of the outer fixing ring, and the elastic clip is located in the first avoidance groove.

4. The electric inductive angle sensor according to claim 1, characterized in that: The first stator and the second stator are connected via a flexible flat cable.

5. The electric inductive angle sensor according to claim 4, characterized in that: A second avoidance groove is provided on the inner side wall of the outer fixing ring, and the flexible flat cable is located in the second avoidance groove.

6. The electric inductive angle sensor according to claim 1, characterized in that: A first limiting protrusion is disposed on the upper end of the inner side wall of the inner fixing ring, and a first limiting groove corresponding to the first limiting protrusion is disposed on the outer side wall of the first stator.

7. The electric inductive angle sensor according to claim 1, characterized in that: A second limiting protrusion is disposed at the lower end of the inner side wall of the inner fixing ring, and a second limiting groove corresponding to the second limiting protrusion is disposed on the outer side wall of the second stator.

8. The electric inductive angle sensor according to claim 1, characterized in that: A clamping groove is provided on the inner side wall of the rotating cylinder portion, and the clamping groove is used to connect an external rotating member.

9. The electric inductive angle sensor according to claim 1, characterized in that: A first connection portion is provided on the outer side wall of the inner fixing ring, and a second connection portion corresponding to the first connection portion is provided on the outer side wall of the outer fixing ring. The first connection portion and the second connection portion are connected by fastening bolts.

10. The electric inductive angle sensor according to claim 1, characterized in that: A third connecting portion is also provided on the outer side wall of the outer fixing ring, and the third connecting portion is used to connect to the external fixing member.

Images