Split type encoder

Abstract

The utility model discloses a split type encoder which comprises a rotor and a stator, and the rotor and the stator are coaxially arranged. The rotor comprises a top cover and a reflecting plate, the top cover is provided with a first sleeve, the reflecting plate sleeves the first sleeve, the top cover is used for connecting a rotating shaft of a measured object, and the reflecting plate is used for reflecting an electric field signal; the stator comprises a shell, a signal plate and a receiving plate, a second sleeve is arranged on the shell, the signal plate and the receiving plate are sequentially arranged on the second sleeve in a sleeving mode, the first sleeve extends into the second sleeve, the shell is used for being connected with a fixed shaft of a measured object, and the receiving plate is used for receiving electric field signals. And the signal plate is used for transmitting an electric field signal and analyzing and processing the received electric field signal. The stator and the rotor are separately installed, the first sleeve extends into the second sleeve, and the rotor extends into the shell of the stator, so that the space utilization rate of the stator is improved, and the size of the encoder is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of encoders, in particular to a split 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 applicable to different working occasions.

[0003] However, most of the existing encoders have complex structures and large volumes, and cannot be installed in equipment with small spaces, unable to 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 a split encoder to solve the technical problem of large volume in the prior art.

[0005] The utility model is realized by adopting the following technical scheme: a split encoder includes a rotor and a stator, and the rotor and the stator are coaxially arranged;

[0006] The rotor includes a top cover and a reflector. A first sleeve is provided on the top cover, and the reflector is sleeved on the first sleeve. The top cover 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 housing, a signal board and a receiving board. A second sleeve is provided on the housing, and the signal board and the receiving board are sequentially sleeved on the second sleeve, and the first sleeve extends into the second sleeve. The housing 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, a first step is provided on the first sleeve, and the inner ring of the reflector contacts the outer side wall of the first step.

[0009] In a possible implementation manner, a receiving groove is provided on the housing, and both the receiving board and the signal board are arranged in the receiving groove.

[0010] In a possible implementation manner, a second step is provided on the inner wall of the receiving groove, and the receiving board is arranged on the second step.

[0011] In a possible implementation, a first positioning groove is provided on the inner side wall of the receiving groove, and a first positioning protrusion is provided on the outer peripheral wall surface of the receiving plate. The first positioning protrusion extends into the first positioning groove.

[0012] In a possible implementation, a second positioning groove is provided on the outer side wall of the second sleeve, and a second positioning protrusion is provided on the inner peripheral wall surface of the receiving plate. The second positioning protrusion extends into the second positioning groove.

[0013] In a possible implementation, a wiring portion is provided on the signal plate, a wire is connected to the wiring portion, and a notch for the wiring portion to pass through is provided on the side wall of the housing.

[0014] In a possible implementation, a connecting portion is provided on the outer peripheral wall of the housing, and a connecting hole is provided on the connecting portion.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: The fixed shaft of the object to be measured is connected to the housing, the rotating shaft of the object to be measured extends into the first sleeve and is connected to the top cover, and the stator and the rotor are separately installed, which can effectively reduce the volume of the encoder. In addition, the first sleeve extends into the second sleeve, so that the rotor extends into the housing of the stator, improving the space utilization rate of the stator and further reducing the volume of the encoder, meeting the application requirements of special occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the split encoder of the present utility model;

[0017] Figure 2 is an exploded view of the split encoder of the present utility model;

[0018] Figure 3 is a cross-sectional view of the split encoder of the present utility model.

[0019] In the figure:

[0020] 100, rotor; 101, top cover; 102, reflector; 103, first sleeve; 104, first step;

[0021] 200, stator; 201, housing; 202, signal plate; 203, receiving plate; 204, second sleeve; 205, receiving groove; 206, second step; 207, first positioning groove; 208, first positioning protrusion; 209, second positioning groove; 210, second positioning protrusion; 211, wiring portion; 212, wire; 213, connecting portion; 214, connecting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.

[0023] 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.

[0024] 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 of such features. In addition, the technical solutions between various embodiments may 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 appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0025] Such as Figures 1-3A split encoder as shown includes a rotor 100 and a stator 200, with the rotor 100 and the stator 200 coaxially arranged; the rotor 100 includes a top cover 101 and a reflector 102. A first sleeve 103 is provided on the top cover 101, and the reflector 102 is sleeved on the first sleeve 103. The top cover 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 housing 201, a signal board 202 and a receiving board 203. A second sleeve 204 is provided on the housing 201, and the signal board 202 and the receiving board 203 are sequentially sleeved on the second sleeve 204, and the first sleeve 103 extends into the second sleeve 204. The housing 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 transmit the electric field signal and analyze and process the received electric field signal. It should be noted that the rotating shaft of the object to be measured is arranged at the center of the fixed shaft. The stator 200 is fixedly connected to the fixed shaft through the housing 201, and the rotor 100 is fixedly connected to the rotating shaft through the first sleeve 103. The first sleeve 103 extends into the second sleeve 204, which effectively guarantees the accuracy of the coaxial installation of the rotor 100 and the stator 200. A signal processing circuit, a digital processor, a digital-to-analog conversion circuit, etc. are provided on the signal board 202. 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. A modulated electric field pattern is provided on the reflector 102, 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 angle signal through the digital-to-analog conversion circuit, so as to achieve the purpose of measuring the rotation angle.

[0026] For the split encoder provided by the present utility model, the fixed shaft of the object to be measured is connected to the housing 201, the rotating shaft of the object to be measured extends into the first sleeve 103 and is connected to the top cover 101. The stator 200 and the rotor 100 are detachably installed, which can effectively reduce the volume of the encoder. Moreover, the first sleeve 103 extends into the second sleeve 204, so that the rotor 100 extends into the housing 201 of the stator 200, improving the space utilization rate of the stator 200 and further reducing the volume of the encoder, meeting the application in special occasions. In addition, the first sleeve 103 and the top cover 101 are of an integral structure, and the second sleeve 204 and the housing 201 are of an integral structure. The first sleeve 103 extending into the second sleeve 204 can not only facilitate the connection between the top cover 101 and the rotating shaft, but also improve the matching accuracy between the rotor 100 and the stator 200.

[0027] Please refer to Figure 3, in a possible implementation, a first step 104 is provided on the first sleeve 103, and the inner ring of the reflector 102 contacts the outer sidewall of the first step 104. It is easy to understand that after the reflector 102 is sleeved on the first sleeve 103, the inner ring of the reflector 102 contacting the outer sidewall of the first step 104 is beneficial to improving the fitting accuracy between the reflector 102 and the top cover 101. Moreover, the reflector 102 and the top cover 101 can be connected by bonding or welding to enhance the connection strength between the reflector 102 and the top cover 101.

[0028] Please refer to Figure 2 , in a possible implementation, a receiving groove 205 is provided on the housing 201, and both the receiving plate 203 and the signal plate 202 are disposed in the receiving groove 205. It is easy to understand that the provision of the receiving groove 205 can provide an installation basis for the receiving plate 203 and the signal plate 202, enabling the receiving plate 203 and the signal plate 202 to be installed within the housing 201, thereby forming the stator 200 with the housing 201. Additionally, the rotor 100 can also extend into the receiving groove 205 to improve the fitting accuracy between the rotor 100 and the stator 200.

[0029] Please refer to Figure 3 , in a possible implementation, a second step 206 is provided on the inner wall of the receiving groove 205, and the receiving plate 203 is disposed on the second step 206. It is easy to understand that the provision of the second step 206 can provide a placement basis for the receiving plate 203. Placing the receiving plate 203 on the second step 206 can keep the middle part of the receiving plate 203 in a suspended state, while the signal plate 202 is located between the receiving plate 203 and the housing 201, which is beneficial to improving the overall structural stability of the stator 200. Moreover, the receiving plate 203 and the housing 201 can also be connected by bonding or welding to enhance the connection strength between the receiving plate 203 and the housing 201.

[0030] Please refer to Figure 2 , in a possible implementation, a first positioning groove 207 is provided on the inner sidewall of the receiving groove 205, and a first positioning protrusion 208 is provided on the outer circumferential wall surface of the receiving plate 203. The first positioning protrusion 208 extends into the first positioning groove 207. It is easy to understand that the cooperation between the first positioning protrusion 208 and the first positioning groove 207 enables the receiving plate 203 to be quickly and accurately installed in the receiving groove 205. Moreover, both end faces of the first positioning protrusion 208 are arc-shaped, and both sidewall surfaces of the first positioning groove 207 are also arc-shaped, and the outer surface of the first positioning protrusion 208 fits and adheres to the inner wall surface of the first positioning groove 207.

[0031] Please refer to Figure 2, in a possible implementation, a second positioning groove 209 is provided on the outer side wall of the second sleeve 204, and a second positioning protrusion 210 is provided on the inner circumferential wall surface of the receiving plate 203. The second positioning protrusion 210 extends into the second positioning groove 209. It is easy to understand that the cooperation between the second positioning protrusion 210 and the second positioning groove 209 enables the receiving plate 203 to be quickly and accurately installed in the accommodating groove 205. Moreover, both end faces of the second positioning protrusion 210 are arc-shaped, and both side wall surfaces of the second positioning groove 209 are also arc-shaped, so that the outer surface of the second positioning protrusion 210 fits well with the inner wall surface of the second positioning groove 209. In addition, the first positioning protrusion 208 and the second positioning protrusion 210 are oppositely arranged on the inner and outer sides of the receiving plate 203. During installation, the first positioning protrusion 208 and the second positioning protrusion 210 simultaneously play a positioning role for the receiving plate 203, which is beneficial to improving the overall stability of the rotor 100.

[0032] Please refer to Figure 2 , in a possible implementation, the signal plate 202 has a wiring portion 211, a wire 212 is connected to the wiring portion 211, and a notch for the wiring portion 211 to pass through is provided on the side wall of the housing 201. It is easy to understand that the wire 212 on the signal plate 202 is used to connect to an external device. The wiring portion 211 corresponds to the notch, and the notch on the side wall of the housing 201 enables the wiring portion 211 to pass through smoothly.

[0033] Please refer to Figure 1 , in a possible implementation, a connecting portion 213 is provided on the outer circumferential wall surface of the housing 201, and a connecting hole 214 is provided on the connecting portion 213. It is easy to understand that the connecting portion 213 is in direct contact with the fixed axis of the object to be measured, and by using a fastening screw to pass through the connecting hole 214, the connecting portion 213 is fixedly connected to the fixed axis, thereby realizing the fixed connection between the stator 200 and the fixed axis. Moreover, the number of the connecting portions 213 is multiple, and the multiple connecting portions 213 are arranged at equal intervals along the outer side wall surface of the housing 201.

[0034] The above embodiments are only the preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A split encoder, characterized in that: It comprises a rotor and a stator, wherein the rotor and the stator are coaxially arranged; The rotor comprises a top cover and a reflective plate, the top cover is provided with a first sleeve, the reflective plate is sleeved on the first sleeve, the top cover 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 shell, a signal board and a receiving board. The shell is provided with a second sleeve. The signal board and the receiving board are sequentially sleeved on the second sleeve, and the first sleeve extends into the second sleeve. The shell is used to connect the fixed axis of the object to be measured, the receiving board is used to receive electric field signals, and the signal board is used to transmit electric field signals and analyze and process the received electric field signals.

2. The split encoder according to claim 1, characterized in that: The first sleeve is provided with a first step, and the inner circle of the reflector is in contact with the outer side wall of the first step.

3. The split encoder according to claim 1, characterized in that: The housing is provided with a receiving groove, and the receiving board and the signal board are both arranged in the receiving groove.

4. The split encoder according to claim 3, characterized in that: A second step is provided on the inner wall of the accommodating groove, and the receiving plate is arranged on the second step.

5. The split encoder according to claim 3, characterized in that: A first positioning groove is provided on the inner side wall of the accommodating groove, and a first positioning protrusion is provided on the outer ring wall surface of the receiving plate, and the first positioning protrusion extends into the first positioning groove.

6. The split encoder according to claim 1, characterized in that: A second positioning groove is provided on the outer side wall of the second sleeve, and a second positioning protrusion is provided on the inner ring wall surface of the receiving plate, and the second positioning protrusion extends into the second positioning groove.

7. The split encoder according to claim 1, characterized in that: The signal board is provided with a wiring portion, the wiring portion is connected with a wire, and the side wall of the shell is provided with a notch for the wiring portion to pass through.

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

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