Encoder

Abstract

The utility model relates to the technical field of encoders, in particular to an encoder, which comprises a shell, a core assembly, a control circuit board, a shielding wire, a signal wire and a metal guide wire. The shell sleeves the outer side of the core assembly, and the core assembly comprises a main body part. The control circuit board is arranged above the core assembly and located in the shell. The first end of the shielding wire and the first end of the signal wire are both connected to the control circuit board, and the second end of the shielding wire and the second end of the signal wire form a wire harness and extend outwards. The first end of the metal guide wire is connected to the control circuit board and electrically connected with the first end of the shielding wire through a wire in the control circuit board. And the second end of the metal guide wire is clamped between the shell and the main body part in an interference fit manner, so that the shell is connected to the shielding wire through the metal guide wire. Therefore, effective conduction of the shielding wire can be ensured without setting a fixing screw, and the structure is simpler.

Description

TECHNICAL FIELD

[0001] The utility model belongs to encoder technical field, especially relate to an encoder. BACKGROUND

[0002] In modern electronic technology field, the encoder is as a kind of sensor that converts rotary displacement into digital pulse signal, is widely used in various automation control systems.The effective connection of the shielded wire of the encoder can ensure that signal is not disturbed by outside.

[0003] The shielded wire of traditional encoder is guaranteed effective conduction by fixing screw, however, in practical application, often meet the situation such as the encoder without fixing screw, fixing screw loss etc.So the effective connection of the shielded wire of the encoder cannot be realized, signal transmission process is susceptible to external electromagnetic interference, influence the performance of the encoder and the stability of system.And some alternative solutions can realize a certain degree of conduction in short term, but due to small contact area, insufficient contact pressure and other reasons, cannot realize stable and reliable conduction effect, and with the extension of use time, due to environmental factors, the connecting part is prone to looseness, oxidation and other problems, in turn will lead to the decline of conduction performance.Still some alternative solutions need to make great changes to the structure of the encoder, increase the manufacturing cost and process complexity.Therefore, in the case that the encoder does not have fixing screw, how to realize the effective conduction of shielded wire has been a technical problem to be solved. SUMMARY

[0004] Therefore, the utility model aims at providing a kind of encoder, without setting fixing screw can guarantee the effective conduction of shielded wire, structure is simpler.

[0005] To achieve the above-mentioned purposes, the technical scheme of the utility model is as follows:

[0006] A kind of encoder, comprising:

[0007] Housing;

[0008] Core component, housing is sleeved on the outside of core component, and core component includes main body part;

[0009] Control circuit board, is located above core component and is located in housing;

[0010] Shielded wire and signal line, the first end of shielded wire and the first end of signal line are connected to control circuit board, and the second end of shielded wire and the second end of signal line form wire harness and extend outward;And

[0011] The metal wire is connected to the control circuit board at a first end and is electrically connected to the first end of the shield wire via a wire in the control circuit board.

[0012] Further, the core assembly further comprises a main shaft and a bearing; the main body comprises a mounting cavity, the bearing is sleeved on the main shaft and is fixed to the inner wall of the mounting cavity, and the bearing is used to realize rotation of the main shaft relative to the main body.

[0013] Further, the core assembly further comprises a light source and a grating, the grating is sleeved on the main shaft and is located between the light source and the control circuit board; the light source is arranged on the main body and is arranged towards the grating.

[0014] Further, the first end of the metal wire is connected to the side of the control circuit board away from the grating and extends downwards to the space between the shell and the main body after being bent.

[0015] Further, the main body is provided with a recessed portion, the recessed portion is recessed downwards from the upper surface of the main body; the second end of the metal wire and the shell are located in the recessed portion, and the second end of the metal wire is clamped between the shell and the inner wall of the recessed portion in an interference fit.

[0016] Further, the recessed portion is located at the outer edge of the main body.

[0017] Further, the diameter of the metal wire is 0.5mm-1mm; and / or

[0018] The length of the metal wire is 10mm-20mm.

[0019] Further, the length of the metal wire at the contact between the second end and the main body is greater than or equal to 2mm; and / or

[0020] The distance between the first end of the metal wire and the first end of the shield wire is less than or equal to 10mm.

[0021] Compared with the prior art, the encoder of the utility model can achieve the following beneficial effects: the utility model discloses an encoder including a metal guide wire, the first end of the metal guide wire is connected to a control circuit board, and is electrically connected with the first end of the shielding wire through the wire in the control circuit board. The second end of the metal guide wire is clamped between the shell and the main body portion by interference fit. The shielding wire is connected to the first end of the metal guide wire through the wire of the control circuit board, and is connected to the main body portion and the shell through the second end of the metal guide wire clamped between the shell and the main body portion by interference fit, thereby completing the conduction of the shielding wire signal. Thus, the effective conduction of the shielding wire can be ensured without setting a fixing screw, and the structure is simpler. Thus, the conduction problem of the shielding wire in the case where the encoder does not have a fixing screw is effectively solved, the stability and accuracy of signal transmission are ensured, errors and faults caused by signal interference are greatly reduced, and the working reliability of the encoder is improved. And through the mode that the second end of the metal guide wire is clamped between the shell and the main body portion by interference fit, the original structure of the encoder does not need to be greatly changed, the manufacturing cost and process complexity are reduced, the production efficiency is improved, and the production cost is reduced. At the same time, the above connection mode has good stability and durability, so that stable contact pressure can be maintained during long-term use, and loosening or poor contact caused by environmental factors such as temperature change and vibration is not prone to occur, and the service life of the encoder is prolonged. The innovative connection method has high universality and expandability, can be applied to various types and specifications of encoders, and provides more flexibility and selection space for the design and manufacture of the encoder. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the present application illustrated in the drawings are presented by way of example or for purpose of illustration, and not as limitations of the present application. In the drawings:

[0023] Figure 1 A schematic diagram of the encoder according to the embodiment of the utility model;

[0024] Figure 2 A partial sectional view of the encoder according to the embodiment of the utility model;

[0025] Figure 3 A schematic diagram of the control circuit board of the encoder according to the embodiment of the utility model.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] Encoder 10; Shell 11; Core assembly 12; Control circuit board 13; Shielding wire 14, signal wire 15; Metal guide wire 16; Main body portion 17; Main shaft 18; Bearing 19; Mounting cavity 20; Wire harness 21; Wire 22; Light source 23; Grating 24; Groove portion 25. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the utility model clearer and more understandable, the utility model will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and do not constitute a limitation on the utility model. In different embodiments, similar elements are associated with similar element numbers. In the following embodiments, many details are described in order to make the utility model better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases or replaced by other elements, materials or methods. In some cases, some operations related to the utility model are not shown or described in the specification in order to avoid the core part of the utility model being overwhelmed by too much description, and detailed description of these related operations is not necessary for those skilled in the art, and they can fully understand the related operations according to the description in the specification and general technical knowledge in the art.

[0029] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined to form various embodiments without conflict. At the same time, each step or action in the method description can be sequentially changed or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean a necessary sequence, unless otherwise stated that a certain sequence must be followed.

[0030] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more.

[0031] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "installation", "connection" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the above-mentioned term can be understood by the specific meaning in the utility model through specific circumstances.

[0032] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0033] Referring to Figure 1 、 Figure 2 And Figure 3 As shown, the encoder 10 comprises a shell 11, a core assembly 12, a control circuit board 13, a shielding wire 14, a signal wire 15 and a metal guide wire 16.

[0034] The shell 11 is sleeved on the outer side of the core assembly 12, which can protect the core assembly 12. The core assembly 12 comprises a main body part 17. The materials of the shell 11 and the main body part 17 can be metal. In an embodiment, the core assembly 12 further comprises a main shaft 18 and a bearing 19. The main shaft 18 is used to connect with an external rotating structure, which can refer to the output shaft of a motor. The bearing 19 can be a ball bearing. The main body part 17 comprises a mounting cavity 20, and the bearing 19 is sleeved on the main shaft 18 and fixed to the inner wall of the mounting cavity 20, so that the main shaft 18 is rotatably arranged in the mounting cavity 20. The bearing 19 is used to realize the rotation of the main shaft 18 relative to the main body part 17. The control circuit board 13 is arranged above the core assembly 12 and located in the shell 11. The control circuit board 13 can realize the control of the encoder 10.

[0035] The first end of the shielding wire 14 and the first end of the signal wire 15 are connected to the control circuit board 13, and the first end of the shielding wire 14 and the first end of the signal wire 15 can be connected to the control circuit board 13 by welding. The second end of the shielding wire 14 and the second end of the signal wire 15 form a wire harness 21 and extend outward.

[0036] The material of the metal guide wire 16 can be copper, which has good electrical conductivity and flexibility. In an embodiment, the diameter of the metal guide wire 16 is 0.5mm-1mm. The length of the metal guide wire 16 is 10mm-20mm, which can ensure stable performance during long-term use of the metal guide wire 16. The first end of the metal guide wire 16 is connected to the control circuit board 13 and connected to the first end of the shielding wire 14 through the wire 22 in the control circuit board 13 (such as a wire). Figure 3The first end of the metal wire 16 can be connected to the control circuit board 13 by welding, which ensures the close connection between the first end of the metal wire 16 and the internal circuit of the control circuit board 13, improves the stability and reliability of signal transmission, and enhances the performance of the encoder 10. The second end of the metal wire 16 is interference-fitted between the shell 11 and the main body 17, so that the shell 11 is connected to the shield wire 14 through the metal wire 16. The shell 11 and the main body 17 can have a gap, and the second end of the metal wire 16 can be interference-fitted in the gap, so that the metal wire 16 is interference-fitted between the shell 11 and the main body 17. The interference fit can continuously provide contact pressure and will not loosen or have poor contact due to the extension of the use time or changes in environmental factors, so that the connection between the metal wire 16 and the shell 11 and the connection between the metal wire 16 and the main body 17 are more stable and reliable, prolonging the service life of the encoder 10. Without making large-scale changes to the original structure of the encoder 10, the manufacturing cost and process complexity are reduced, which is conducive to improving production efficiency and reducing production cost. The shield wire 14 is connected to the first end of the metal wire 16 through the lead 22 of the control circuit board 13, and is connected to the main body 17 and the shell 11 through the second end of the metal wire 16 that is interference-fitted between the shell 11 and the main body 17, thereby completing the conduction of the shield wire 14 signal. Without the need for a fixed screw, the shield wire 14 can be effectively conducted, and the structure is simpler. Thus, the shield wire 14 can be used to prevent the signal wire 15 from being affected by external electromagnetic interference, greatly reducing the errors and failures of the encoder 10 caused by signal interference, and improving the working reliability of the encoder 10. At the same time, the good conductivity of the metal wire 16 can more effectively shield external electromagnetic interference and ensure stable transmission of the encoder 10 signal, and can be applied to different types and specifications of encoders 10, providing more flexibility and selection space for the design and manufacture of the encoder 10.

[0037] In an embodiment, the length of the metal wire 16 at the contact between the second end and the main body 17 is greater than or equal to 2 mm, so that the shield wire 14 has good conduction effect and the encoder 10 has high use reliability. Figure 1 In the embodiment shown, the metal wire 16 is first bent and then extends in the vertical direction from the first end to the second end, so that the contact between the second end of the metal wire 16 and the main body 17 is a straight line with a length H≥2 mm.

[0038] In one embodiment, the core component 12 further comprises a light source 23 and a grating 24. The grating 24 is sleeved on the main shaft 18 and located between the light source 23 and the control circuit board 13. The grating 24 can rotate synchronously with the main shaft 18. The light source 23 is arranged on the main body 17 and faces the grating 24. The light beam emitted by the light source 23 can irradiate on the grating 24. When the grating 24 rotates synchronously with the main shaft 18, the state of the grating 24 of blocking light or transmitting light can be changed, thereby generating different light signals.

[0039] In one embodiment, the first end of the metal wire 16 is connected to the side of the control circuit board 13 away from the grating 24 and extends downward between the shell 11 and the main body 17 after being bent. In this way, the contact area between the metal wire 16 and the shell 11 is large, so that the arrangement of the metal wire 16 is more compact and reasonable.

[0040] In one embodiment, the main body 17 is provided with a recessed portion 25 which is recessed downward from the upper surface of the main body 17. The second end of the metal wire 16 and the shell 11 are located in the recessed portion 25, and the second end of the metal wire 16 is clamped between the shell 11 and the inner wall of the recessed portion 25 in an interference fit, so that the fixing effect of the second end of the metal wire 16 is better. Figure 1 In the embodiment shown in FIG. 1, the recessed portion 25 is located at the outer edge of the main body 17.

[0041] It should be understood that the above-described various forms of processes can be reordered, added or deleted. For example, the steps described in the present disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions of the present disclosure can be achieved, which are not limited herein.

[0042] The above detailed description does not constitute a limitation on the scope of protection of the present disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. An encoder, characterized in that, include: case; A core component, wherein the housing is fitted onto the outside of the core component, and the core component includes a main body portion; The control circuit board is located above the core component and inside the housing; The shielded wire and the signal wire are connected to the control circuit board at the first end of the shielded wire and the first end of the signal wire, and the second end of the shielded wire and the second end of the signal wire form a wire bundle and extend outward. and A metal guide wire, the first end of which is connected to the control circuit board and electrically connected to the first end of the shielding wire through a wire in the control circuit board; the second end of the metal guide wire is interference-fitted between the housing and the main body so that the housing is connected to the shielding wire through the metal guide wire.

2. The encoder according to claim 1, characterized in that, The core component also includes a spindle and a bearing; the main body includes a mounting cavity, the bearing is sleeved on the spindle and fixed to the inner wall of the mounting cavity, and the bearing is used to enable the spindle to rotate relative to the main body.

3. The encoder according to claim 2, characterized in that, The core component also includes a light source and a grating. The grating is sleeved on the main shaft and located between the light source and the control circuit board. The light source is disposed on the main body and is oriented toward the grating.

4. The encoder according to claim 3, characterized in that, The first end of the metal guide wire is connected to the side of the control circuit board away from the grating, and extends downward after being bent to the space between the housing and the main body.

5. The encoder according to claim 1, characterized in that, The main body is provided with a groove, which is formed by recessing downward from the upper surface of the main body; the second end of the metal guide wire and the housing are located in the groove, and the second end of the metal guide wire is interference-fitted between the housing and the inner wall of the groove.

6. The encoder according to claim 5, characterized in that, The groove is located at the outer edge of the main body.

7. The encoder according to claim 1, characterized in that, The diameter of the metal guide wire is 0.5 mm to 1 mm; and / or The length of the metal guide wire is 10mm to 20mm.

8. The encoder according to claim 1, characterized in that, The length of the second end of the metal guide wire in contact with the main body is greater than or equal to 2 mm; and / or The distance between the first end of the metal guide wire and the first end of the shielding wire is less than or equal to 10 mm.

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