Elastic sheet coupling for small high-precision encoder

Abstract

The utility model relates to the field of coupling, provide a kind of elastic sheet coupling for small high-precision encoder, including central ring body, connecting unit, and connecting unit includes connecting strip, connecting column and connecting block.Elastic sheet coupling being set, the rotation movement of the measured power shaft can be accurately transmitted to encoder shaft, the transmission of torque is realized;During torque transmission process, the radial or axial offset that can appear between the measured power shaft and encoder shaft can be compensated, avoid the additional stress and wear of encoder due to the misalignment of two shafts, ensure the normal work and measurement accuracy of encoder;At the same time, the vibration and impact generated when equipment moves can be absorbed and buffered, reducing its adverse effects on encoder;In addition, the mechanical load transmitted to encoder shaft can also be limited, to prevent excessive shaft force and torque from causing damage to encoder shaft and bearing, protect the key components of encoder, prolong the service life of encoder.

Description

Technical Field

[0001] This utility model relates to the field of couplings, and more particularly to a flexible plate coupling for a small high-precision encoder. Background Technology

[0002] A small, high-precision encoder is an angle detection sensor that converts the angle of the input shaft into corresponding electrical pulses or digital signals. It has the advantages of small size and high precision and is currently widely used in devices and equipment that require angle detection, such as CNC machine tools, rotary tables, servo motors, robots, radar, and military target measurement.

[0003] The accuracy and reliability of small encoders are affected by a variety of factors, including environmental, electrical, and mechanical installation factors. Among these, mechanical installation factors mainly include whether the shaft system is aligned (coaxiality) and whether the clearance meets the requirements. If the encoder shaft is not concentric or parallel to the measured shaft (angular error) or there is axial movement during installation, additional radial or axial loads will be generated on the encoder bearings, which will lead to the following problems: (1) premature wear and failure of the bearings; shaft deformation or breakage; (2) shaft deformation or breakage; (3) changes in the clearance between the code disk and the sensor, affecting signal quality; (4) additional mechanical noise and vibration. Utility Model Content

[0004] The present invention aims to provide a flexible plate coupling for a small, high-precision encoder to solve at least one of the problems existing in the prior art.

[0005] This utility model provides a flexible plate coupling for a small, high-precision encoder, comprising: A central ring body, the outer wall of which is evenly distributed with multiple connecting units, each connecting unit including a connecting strip disposed on the outer side of the central ring body, the connecting strip being connected to the central ring body through multiple spaced connecting posts; connecting blocks are disposed on both sides of the connecting strip, one of the connecting blocks being provided with a first connecting hole, and the other connecting block being provided with a second connecting hole.

[0006] According to the present invention, a small high-precision encoder elastic plate coupling is provided, wherein the number of connecting units is four, the first connecting hole and the second connecting hole in adjacent connecting units are close to each other, and the centers of the first connecting hole and the second connecting hole are concentric.

[0007] According to the present invention, a flexible plate coupling for a small high-precision encoder is provided, wherein the included angle α between the center lines of the first connecting hole and the second connecting hole in adjacent connecting units is 26°.

[0008] According to the present invention, a small high-precision encoder elastic plate coupling is provided, wherein the included angle b between the inner edges of two closely spaced connecting blocks in adjacent connecting units is 17°, and the included angle c between their outer edges is 38°.

[0009] According to the present invention, a flexible sheet coupling for a small high-precision encoder is provided, wherein the connecting strip includes a concave section, and an convex section is connected to both sides of the concave section, and the end of the convex section is connected to the connecting block; the number of connecting posts is two, and the two connecting posts are respectively arranged on both sides of the concave section.

[0010] According to the present invention, a small high-precision encoder elastic plate coupling is provided, wherein the included angle d between the inner edges of the two connecting posts in the same connecting unit is 24°, and the included angle e between the inner edges of the two closely spaced connecting posts in adjacent connecting units is 66°.

[0011] According to the present invention, a flexible sheet coupling for a small high-precision encoder is provided, wherein the central ring, the connecting strip, the connecting column and the connecting block are integrally formed and are made of stainless steel.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: By using a flexible plate-like coupling, the rotational motion of the measured power shaft can be accurately transmitted to the encoder shaft, achieving torque transmission. During torque transmission, it can compensate for any radial or axial misalignment that may occur between the measured power shaft and the encoder shaft, avoiding additional stress and wear on the encoder due to misalignment of the two shafts, thus ensuring the normal operation and measurement accuracy of the encoder. At the same time, it can absorb and buffer the vibration and impact generated during equipment movement, reducing their adverse effects on the encoder. In addition, it can limit the mechanical load transmitted to the encoder shaft, preventing excessive axial force and torque from damaging the encoder shaft and bearings, protecting the key components of the encoder, and extending the encoder's service life.

[0013] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0014] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the elastic plate coupling for a small high-precision encoder provided in this utility model embodiment; Figure 2 This is a schematic diagram of the planar structure of the elastic sheet coupling for a small high-precision encoder provided in this embodiment of the utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Central ring body; 2. Connecting unit; 21. Connecting strip; 210. Concave section; 211. Protruding section; 22. Connecting post; 23. Connecting block; 230. First connecting hole; 231. Second connecting hole. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] Example: This utility model embodiment provides a flexible plate coupling for a small, high-precision encoder. Please refer to [link / reference]. Figures 1-2 It includes: a central ring body 1, and multiple connecting units 2 are evenly distributed on the outer wall of the central ring body 1. Each connecting unit 2 includes a connecting strip 21 disposed on the outer side of the central ring body 1. The connecting strip 21 is connected to the central ring body 1 through multiple spaced connecting posts 22. Connecting blocks 23 are disposed on both sides of the connecting strip 21. One connecting block 23 is provided with a first connecting hole 230, and the other connecting block 23 is provided with a second connecting hole 231.

[0019] In this embodiment, the first connecting hole 230 is a countersunk screw hole for connecting to the measured power shaft; the second connecting hole 231 is an internal hexagonal flat head screw hole for connecting to the encoder shaft; the central ring 1, connecting strip 21, connecting post 22, and connecting block 23 are integrally formed structures, using 2.5mm thick high-strength stainless steel sheets, such as SUS304, formed by laser cutting, and the whole is a sheet-like elastic structure; the stainless steel material has the characteristics of temperature resistance (-80℃ to +250℃), oil resistance, and corrosion resistance, and can be adapted to harsh application environments; the integrally formed structure has a very short overall axial length, does not occupy too much space, is lightweight and has a small moment of inertia, can adapt to the narrow installation space of small encoders, and will not affect the dynamic response of the system.

[0020] When in use, this elastic plate coupling can be used with an intermediate diaphragm. The intermediate diaphragm can be a circular metal sheet with high strength and a certain degree of flexibility. Two of the above-mentioned elastic plate couplings are symmetrically arranged on both sides of the intermediate diaphragm. A hexagonal flat-head screw is inserted through the corresponding second connecting hole 231 and connected to the encoder shaft. A countersunk screw is inserted through the corresponding first connecting hole 230 and connected to the measured power shaft. During operation, when the measured power shaft inputs power, it is first transmitted to the elastic plate coupling on that side, causing it to undergo elastic deformation. The force generated by the deformation is transmitted to the intermediate diaphragm, which then undergoes a slight deformation, transmitting the torque to the elastic plate coupling on the other side. This elastic plate coupling also transmits the torque to the encoder shaft through elastic deformation. Throughout the process, the elastic deformation not only transmits the torque but also absorbs the relative displacement and vibration between the two shafts.

[0021] This solution, through the use of a flexible plate-like coupling, accurately transmits the rotational motion of the measured power shaft to the encoder shaft, achieving torque transmission. During torque transmission, it compensates for any radial or axial misalignment that may occur between the measured power shaft and the encoder shaft, preventing additional stress and wear on the encoder due to misalignment, thus ensuring normal operation and measurement accuracy. Simultaneously, it absorbs and buffers vibrations and shocks generated during equipment movement, reducing their adverse effects on the encoder. Furthermore, it limits the mechanical load transmitted to the encoder shaft, preventing excessive axial force and torque from damaging the encoder shaft and bearings, protecting critical encoder components, and extending the encoder's service life.

[0022] In a further optimized design, the number of connecting units 2 is four. The first connecting hole 230 and the second connecting hole 231 in adjacent connecting units 2 are close to each other, and the centers of the first connecting hole 230 and the second connecting hole 231 are concentric. By setting the centers of the first connecting hole 230 and the second connecting hole 231 to be concentric, it is easier to align the holes when the two elastic sheet couplings are engaged with the intermediate diaphragm.

[0023] Specifically, the included angle α between the center lines of the first connecting hole 230 and the second connecting hole 231 in the adjacent connecting unit 2 is 26°; the included angle b between the inner edges of the two closely spaced connecting blocks 23 in the adjacent connecting unit 2 is 17°, and the included angle c between the outer edges is 38°.

[0024] Further optimization of the scheme: the connecting strip 21 includes a concave section 210, and an outward convex section 211 is connected to both sides of the concave section 210. The end of the outward convex section 211 is connected to the connecting block 23. There are two connecting posts 22, which are respectively arranged on both sides of the concave section 210.

[0025] Specifically, the included angle d between the inner edges of two connecting posts 22 in the same connecting unit 2 is 24°, and the included angle e between the inner edges of two closely spaced connecting posts 22 in adjacent connecting units 2 is 66°. By specifying the number of connecting units 2, the specific structure of the connecting strip 21, the number of connecting posts 22, and the specific settings of angles a, b, c, d, and e, combined with the use of stainless steel, zero-backlash transmission, precise compensation for installation deviations, and adaptability to miniaturization and harsh working conditions can be achieved.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A flexible plate coupling for a small, high-precision encoder, characterized in that, include: A central ring body (1) has multiple connecting units (2) evenly distributed on its outer wall. Each connecting unit (2) includes a connecting strip (21) disposed on the outer side of the central ring body (1). The connecting strip (21) is connected to the central ring body (1) through multiple spaced connecting posts (22). Connecting blocks (23) are provided on both sides of the connecting strip (21). One of the connecting blocks (23) is provided with a first connecting hole (230), and the other connecting block (23) is provided with a second connecting hole (231).

2. The flexible plate coupling for a small high-precision encoder according to claim 1, characterized in that, The number of the connecting units (2) is four. The first connecting hole (230) and the second connecting hole (231) in the adjacent connecting units (2) are close to each other, and the centers of the first connecting hole (230) and the second connecting hole (231) are on the same circle.

3. The flexible plate coupling for a small high-precision encoder according to claim 2, characterized in that, The included angle α between the center lines of the first connecting hole (230) and the second connecting hole (231) in the adjacent connecting unit (2) is 26°.

4. The elastic plate coupling for a small high-precision encoder according to claim 2, characterized in that, The included angle b between the inner edges of two adjacent connecting blocks (23) in the adjacent connecting unit (2) is 17°, and the included angle c between their outer edges is 38°.

5. The elastic plate coupling for a small high-precision encoder according to claim 2, characterized in that, The connecting strip (21) includes a concave section (210), and two convex sections (211) are connected to the two sides of the concave section (210). The end of the convex section (211) is connected to the connecting block (23). There are two connecting posts (22), and the two connecting posts (22) are respectively arranged on both sides of the concave section (210).

6. The flexible plate coupling for a small high-precision encoder according to claim 5, characterized in that, The included angle d between the inner edges of the two connecting posts (22) in the same connecting unit (2) is 24°, and the included angle e between the inner edges of the two closely spaced connecting posts (22) in adjacent connecting units (2) is 66°.

7. The flexible plate coupling for a small high-precision encoder according to any one of claims 1-6, characterized in that, The central ring (1), the connecting strip (21), the connecting column (22), and the connecting block (23) are integrally formed structures made of stainless steel.

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