Ultra-thin split type inductance encoder

Abstract

The utility model discloses an ultra-thin split type inductance encoder, which comprises a rotor and a stator, the rotor and the stator are both annular, and the rotor and the stator are coaxially arranged; the rotor comprises an upper shell and a reflecting plate, the reflecting plate is arranged in the upper shell, the upper shell is used for being connected with a rotating shaft of a measured object, and the reflecting plate is used for reflecting an electric field signal; the stator comprises a lower shell, a signal plate and a receiving plate, the receiving plate is arranged in the lower shell, the signal plate is arranged on the inner side face of the receiving plate, the lower shell is used for being connected with a fixed shaft of a measured object, and the receiving plate is used for receiving an electric field signal; and the signal plate is used for transmitting an electric field signal and analyzing and processing the received electric field signal. A fixed shaft of a measured object is directly connected with the stator, a rotating shaft of the measured object penetrates through the middle of the stator and is connected with the rotor, the stator and the rotor are installed in a separated mode, the axial size of the encoder can be effectively reduced, and application in special occasions is met.

Description

Technical Field

[0001] The utility model relates to the technical field of encoders, in particular to an ultra-thin split inductive encoder. Background Art

[0002] At present, in the fields of electronic pods, vehicles, aircrafts, ships, robot control, etc., for the angle measurement of rotating objects, encoders with different structural forms and different principles are generally selected to meet the corresponding application requirements. These encoders include optical encoders, electromagnetic encoders, resolvers, etc. Different products have their own advantages and disadvantages and are respectively suitable for different working occasions.

[0003] However, most of the existing encoders have complex structures and large axial dimensions, and cannot be installed in equipment with a narrow space, so they cannot meet the application requirements of special occasions. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide an ultra-thin split inductive encoder to solve the technical problem of large axial dimensions existing in the prior art.

[0005] The utility model is realized by adopting the following technical scheme: An ultra-thin split inductive encoder includes a rotor and a stator. Both the rotor and the stator are annular, and the rotor and the stator are coaxially arranged.

[0006] The rotor includes an upper shell and a reflector. The reflector is arranged inside the upper shell. The upper shell is used to connect the rotating shaft of the object to be measured, and the reflector is used to reflect the electric field signal.

[0007] The stator includes a lower shell, a signal board and a receiving board. The receiving board is arranged inside the lower shell. The signal board is arranged on the inner side surface of the receiving board. The lower shell is used to connect the fixed shaft of the object to be measured. The receiving board is used to receive the electric field signal, and the signal board is used to emit the electric field signal and analyze and process the received electric field signal.

[0008] In a possible implementation manner, positioning protrusions are arranged on the inner side wall of the first accommodation groove, and positioning grooves are arranged on the inner circumferential wall surface of the reflector. The positioning protrusions extend into the positioning grooves.

[0009] In a possible implementation manner, a first step is arranged on the inner wall of the first accommodation groove, and the reflector is arranged on the first step.

[0010] In a possible implementation manner, a second accommodation groove is arranged on the lower shell, and the receiving board is arranged in the second accommodation groove.

[0011] In a possible implementation manner, a second step is provided on the inner wall of the second receiving groove, and the receiving plate is arranged on the second step.

[0012] In a possible implementation manner, an inner ring wall of the upper shell extends inwards to form a first connecting portion, and a first connecting hole is provided on the first connecting portion.

[0013] In a possible implementation manner, a second connecting portion is provided on an outer ring wall of the lower shell, and a second connecting hole is provided on the second connecting portion.

[0014] In a possible implementation manner, a wire is provided on the signal plate, and a notch for the wire to pass through is provided on a side wall of the lower shell.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: both the rotor and the stator adopt a hollow annular design. The fixed axis of the object to be measured is directly connected to the stator, and the rotating shaft of the object to be measured passes through the middle of the stator and is connected to the rotor. The stator and the rotor are detachably installed, which can effectively reduce the axial dimension of the encoder. In addition, the reflection plate is arranged in the upper shell, and the emitting plate and the signal plate are arranged in the lower shell. The axial dimension of the entire encoder is the sum of the thicknesses of the upper shell and the lower shell, further reducing the axial dimension of the encoder and meeting the application in special occasions. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the ultra-thin split-type inductive encoder of the present utility model;

[0017] Figure 2 is an exploded view of the ultra-thin split-type inductive encoder of the present utility model;

[0018] Figure 3 is a partial structural cross-sectional view of the ultra-thin split-type inductive encoder of the present utility model;

[0019] Figure 4 is an exploded view of the rotor in the ultra-thin split-type inductive encoder of the present utility model.

[0020] In the figure:

[0021] 100, rotor; 101, upper shell; 102, reflection plate; 103, first receiving groove; 104, positioning protrusion; 105, positioning groove; 106, first step; 107, first connecting portion; 108, first connecting hole;

[0022] 200, stator; 201, lower shell; 202, signal plate; 203, receiving plate; 204, second receiving groove; 205, second step; 206, second connecting portion; 207, second connecting hole; 208, wire. Detailed Embodiments

[0023] 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 the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0024] 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 the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating 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 can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions conflicts 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 the present application.

[0026] Such as Figures 1-4An ultra-thin split-type inductive encoder as shown includes a rotor 100 and a stator 200. Both the rotor 100 and the stator 200 are annular, and the rotor 100 and the stator 200 are coaxially arranged. The rotor 100 includes an upper shell 101 and a reflector 102. The reflector 102 is arranged inside the upper shell 101. The upper shell 101 is used to connect the rotating shaft of the object to be measured, and the reflector 102 is used to reflect the electric field signal. The stator 200 includes a lower shell 201, a signal board 202 and a receiving board 203. The receiving board 203 is arranged inside the lower shell 201. The signal board 202 is arranged on the inner side surface of the receiving board 203. The lower shell 201 is used to connect the fixed shaft of the object to be measured. The receiving board 203 is used to receive the electric field signal, and the signal board 202 is used to emit the electric field signal and analyze and process the received electric field signal. It should be noted that the fixed shaft of the object to be measured is in a ring structure, the rotating shaft of the object to be measured is arranged at the center of the fixed shaft, the rotor 100 is fixedly connected to the rotating shaft, and the stator 200 is fixedly connected to the fixed shaft, ensuring that the rotor 100 and the stator 200 can be coaxially installed. The signal board 202 is provided with a signal processing circuit, a digital processor, a digital-to-analog conversion circuit, etc. When the object to be measured rotates, it drives the rotor 100 to rotate. The stator 200 emits an electric field signal to the rotor 100 and receives the returned electric field signal for processing. The reflector 102 is provided with a modulated electric field pattern, and the modulation information at different rotation positions is different. The signal processing circuit on the signal board 202 determines the rotation angle position according to the returned electric field signal and outputs an angular electric field signal through the digital-to-analog conversion circuit, so as to achieve the purpose of measuring the rotation angle.

[0027] For the ultra-thin split-type inductive encoder provided by the present utility model, both the rotor 100 and the stator 200 adopt a hollow annular design. The fixed shaft of the object to be measured is directly connected to the stator 200, and the rotating shaft of the object to be measured passes through the middle of the stator 200 and is connected to the rotor 100. The stator 200 and the rotor 100 are separately installed, which can effectively reduce the axial dimension of the encoder. In addition, the reflector 102 is arranged inside the upper shell 101, and the emitting board and the signal board 202 are arranged inside the lower shell 201. The axial dimension of the whole encoder is the sum of the thicknesses of the upper shell 101 and the lower shell 201, further reducing the axial dimension of the encoder, meeting the application in special occasions, and also having the advantages of small volume, light weight and high precision, which is convenient for users to use.

[0028] Please refer to Figure 4 , in a possible implementation manner, the upper shell 101 is provided with a first receiving groove 103, and the reflector 102 is arranged in the first receiving groove 103. It is easy to understand that the setting of the first receiving groove 103 can provide an installation basis for the reflector 102, so that the reflector 102 is installed inside the upper shell 101, and thus the reflector 102 and the upper shell 101 form the rotor 100.

[0029] Please refer to Figure 4, in a possible implementation, a positioning protrusion 104 is provided on the inner sidewall of the first receiving groove 103, and a positioning groove 105 is provided on the inner circumferential wall surface of the reflector 102. The positioning protrusion 104 extends into the positioning groove 105. It is easy to understand that the cooperation of the positioning protrusion 104 and the positioning groove 105 enables the reflector 102 to be quickly and accurately installed in the first receiving groove 103. Moreover, both end faces of the positioning protrusion 104 are arc surfaces, and both sidewall surfaces of the positioning groove 105 are also arc surfaces, so that the outer surface of the positioning protrusion 104 fits well with the inner wall surface of the positioning groove 105, which is beneficial to improving the overall stability of the rotor 100.

[0030] Please refer to Figure 3 , in a possible implementation, a first step 106 is provided on the inner wall of the first receiving groove 103, and the reflector 102 is disposed on the first step 106. It is easy to understand that the provision of the first step 106 can provide a placement basis for the reflector 102. When the reflector 102 is placed on the first step 106, the middle part of the reflector 102 can be in a suspended state, and the reflector 102 and the upper shell 101 can be connected by bonding or welding.

[0031] Please refer to Figure 2 , in a possible implementation, a second receiving groove 204 is provided on the lower shell 201, and the receiving plate 203 is disposed in the second receiving groove 204. It is easy to understand that the provision of the second receiving groove 204 can provide an installation basis for the receiving plate 203 and the signal plate 202, so that the receiving plate 203 and the signal plate 202 are installed in the lower shell 201, thereby forming the stator 200 together with the lower shell 201 for the receiving plate 203, the signal plate 202.

[0032] Please refer to Figure 3 , in a possible implementation, a second step 205 is provided on the inner wall of the second receiving groove 204, and the receiving plate 203 is disposed on the second step 205. It is easy to understand that the provision of the second step 205 can provide a placement basis for the receiving plate 203. When the receiving plate 203 is placed on the second step 205, the middle part of the receiving plate 203 can be in a suspended state, while the signal plate 202 is located between the receiving plate 203 and the lower shell 201, which is beneficial to improving the overall structural stability of the stator 200.

[0033] Please refer to Figure 4 , in a possible implementation, an inner circumferential wall of the upper shell 101 extends inward to form a first connecting portion 107, and a first connecting hole 108 is provided on the first connecting portion 107. It is easy to understand that the rotating shaft of the object to be measured extends from the middle of the stator 200, then contacts the first connecting portion 107, and then the upper shell 101 is fixedly connected to the rotating shaft by using a fastening bolt to pass through the first connecting hole 108, so as to realize the rotation of the rotor 100 together with the rotating shaft of the object to be measured.

[0034] Please refer to Figure 2 , in a possible implementation, a second connection part 206 is provided on the outer peripheral wall of the lower shell 201, and a second connection hole 207 is provided on the second connection part 206. It is easy to understand that the second connection part 206 is in direct contact with the fixed axis of the object to be measured, and a fastening screw is used to pass through the second connection hole 207 so that the stator 200 is fixedly connected to the fixed axis. Moreover, the number of the second connection parts 206 is multiple, and the multiple second connection parts 206 are arranged at equal intervals along the outer side wall of the lower shell 201.

[0035] Please refer to Figure 2 , in a possible implementation, a wire 208 is provided on the signal board 202, and a notch for the wire 208 to pass through is provided on the side wall of the lower shell 201. It is easy to understand that the wire 208 on the signal board 202 is used to connect an external device, and the notch on the side wall of the lower shell 201 enables the wire 208 to pass through smoothly. Moreover, since the wire 208 must correspond to the notch, it can also play a role in positioning the signal board 202. And since the signal board 202 is arranged on the inner side surface of the receiving board 203, the positioning effect on the receiving board 203 is also achieved, so that the receiving board 203 can be quickly and accurately installed on the lower shell 201.

[0036] The above implementation is only the preferred implementation of the present utility model, and cannot be used to limit the protection scope of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model belong to the protection scope required by the present utility model.

Claims

1. An ultra-thin split inductive encoder, characterized in that: It comprises a rotor and a stator, wherein the rotor and the stator are both annular, and the rotor and the stator are coaxially arranged; The rotor comprises an upper shell and a reflective plate, wherein the reflective plate is arranged in the upper shell, the upper shell is used to connect the rotating shaft of the object to be measured, and the reflective plate is used to reflect the electric field signal; The stator includes a lower shell, a signal board and a receiving board. The receiving board is arranged in the lower shell, and the signal board is arranged on the inner side of the receiving board. The lower shell is used to connect the fixed axis of the object to be measured, the receiving board is used to receive the electric field signal, and the signal board is used to transmit the electric field signal and analyze and process the received electric field signal.

2. The ultra-thin split inductive encoder according to claim 1, characterized in that: The upper shell is provided with a first accommodating groove, and the reflecting plate is arranged in the first accommodating groove.

3. The ultra-thin split inductive encoder according to claim 2, characterized in that: A positioning protrusion is provided on the inner side wall of the first accommodating groove, a positioning groove is provided on the inner circle wall surface of the reflecting plate, and the positioning protrusion extends into the positioning groove.

4. The ultra-thin split inductive encoder according to claim 2, characterized in that: A first step is provided on the inner wall of the first containing groove, and the reflecting plate is arranged on the first step.

5. The ultra-thin split inductive encoder according to claim 1, characterized in that: The lower shell is provided with a second accommodating groove, and the receiving plate is arranged in the second accommodating groove.

6. The ultra-thin split-type inductive encoder according to claim 5, characterized in that: A second step is provided on the inner wall of the second containing groove, and the receiving plate is arranged on the second step.

7. The ultra-thin split-type inductive encoder according to claim 1, characterized in that: The inner ring wall of the upper shell extends inwardly to form a first connecting portion, and a first connecting hole is provided on the first connecting portion.

8. The ultra-thin split-type inductive encoder according to claim 1, characterized in that: A second connecting portion is provided on the outer ring wall of the lower shell, and a second connecting hole is provided on the second connecting portion.

9. The ultra-thin split-type inductive encoder according to claim 1, characterized in that: The signal board is provided with a wire, and the side wall of the lower shell is provided with a notch for the wire to pass through.

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