Coupling

Abstract

The utility model discloses a coupler, relates to the technical field of couplings, and provides a coupler which comprises a first coupling shaft, a second coupling shaft and a spring piece clamped between the first coupling shaft and the second coupling shaft. Center holes are formed in the centers, in the axial direction of the coupler, of the first coupling shaft, the second coupling shaft and the spring piece, the circle centers of the center holes are located on the same axis, a first straight handle is arranged at the end, facing the spring piece, of the first coupling shaft, and a second straight handle is arranged at the end, facing the spring piece, of the second coupling shaft. The width of the first straight handle and the width of the second straight handle are equal to the maximum width of the spring piece, fixing holes are formed in the first straight handle, the second straight handle and the spring piece, and fixing pieces used for fixedly connecting the first coupling shaft and the second coupling shaft with the spring piece are arranged in the fixing holes. When the executing mechanism is not coaxial with the rotating shaft of the angle measuring device, the spring piece generates slight deformation compensation, and signal collection jumping of the angle measuring device is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shaft coupling technical field, concretely relates to a shaft coupling. BACKGROUND

[0002] In the current equipment with rotation function, in order to accurately measure and control the rotation angle, a rigid connection shaft is usually installed between the angle measuring device and the actuator, and the rigid connection shaft is usually manufactured by integral machining, and has the advantages of small size, high product precision and no empty return amount. However, due to the rigid connection characteristics of the rigid connection shaft, the product machining and installation precision have high requirements. In actual application, especially in the use process of a product, due to the difficulty in achieving ideal assembly precision, the rotation centers of the angle measuring device and the actuator cannot be completely collinear, causing slight flexure of the shaft coupling in the axial direction, leading to unstable signal collection of the angle measuring device and data jump. SUMMARY

[0003] The present application provides a shaft coupling, which can solve the technical problems of the shaft coupling in the prior art, such as slight flexure in the axial direction, unstable signal collection of the angle measuring device and data jump.

[0004] The present application provides a shaft coupling, which comprises a first shaft coupling, a second shaft coupling and a spring sheet clamped between the first shaft coupling and the second shaft coupling. The first shaft coupling, the second shaft coupling and the spring sheet are all provided with a center hole at the center of the axial direction of the shaft coupling, the centers of the center holes are located on the same axis, one end of the first shaft coupling towards the spring sheet is provided with a first straight handle, one end of the second shaft coupling towards the spring sheet is provided with a second straight handle, the widths of the first straight handle and the second straight handle are equal to the maximum width of the spring sheet, and the first straight handle, the second straight handle and the spring sheet are all provided with fixing holes, and the fixing holes are provided with fixing members for fixing the first shaft coupling and the second shaft coupling to the spring sheet, respectively.

[0005] In combination with the above embodiment, in an embodiment, the orthographic projection of the first straight handle on the spring sheet and the orthographic projection of the second straight handle on the spring sheet are perpendicular and intersected to form a cross shape, and the orthographic projection of the fixing hole on the first straight handle on the spring sheet does not cover the orthographic projection of the fixing hole on the second straight handle on the spring sheet.

[0006] In combination with the above embodiment, in an embodiment, the first straight handle and the second straight handle are provided with protruding steps at both ends of the side towards the spring sheet, and the fixing holes are located on the steps.

[0007] In combination with the above embodiment, in an embodiment, the shaft coupling further comprises:

[0008] A first clamp and a second clamp are engaged at the end of the second coupling away from the spring plate. Both the first clamp and the second clamp have a Z-shaped structure. The inner walls of the first clamp and the second clamp are smooth arc surfaces, and the curvature of the arc surfaces matches the curvature of the outer side of the second coupling.

[0009] In one embodiment, in conjunction with the above embodiments, connecting ears are symmetrically provided on both sides of the first clamp and the second clamp. The connecting ears of the first clamp have a round hole, and the connecting ears of the second clamp have a threaded hole. The first clamp and the second clamp are engaged and connected by screws that pass through the round hole and the threaded hole in sequence.

[0010] In conjunction with the above embodiments, in one implementation, the outer wall of the second coupling has multiple straight grooves along the axial direction of the coupling, the multiple straight grooves are spaced at the same interval, and the gap width between the first clamp and the second clamp is greater than the width of one of the straight grooves.

[0011] In one embodiment, in conjunction with the above embodiments, the second coupling passes through the first clamp and the second clamp, and the portion of the second coupling exposed above the first clamp and the second clamp is provided with a protruding structure, and the protruding structure is in contact with the first clamp and the second clamp.

[0012] In one embodiment, in conjunction with the above embodiments, the spring sheet has an annular cross-sectional shape in the axial direction perpendicular to the first coupling, the central hole is located at the center of the spring sheet, and the spring sheet has a plurality of fixing holes along the circumference, and the spacing between the plurality of fixing holes is the same.

[0013] In one embodiment, in conjunction with the above embodiments, the spring sheet has a rectangular cross-sectional shape in the axial direction perpendicular to the first coupling, the central hole is located at the center of the spring sheet, and a fixing hole is provided on each side of the spring sheet.

[0014] In one embodiment, in conjunction with the above embodiments, the fixing hole is a riveting hole, the fixing member is a rivet, and the first coupling and the second coupling are fixedly connected to the spring sheet by the rivet passing through the riveting hole.

[0015] The beneficial effects of the technical solutions provided in this application include:

[0016] This application embodiment includes a first coupling fixedly connected to an actuator, a second coupling fixedly connected to an angle measuring device, and a spring plate sandwiched between the first and second couplings. Each of the first coupling, the second coupling, and the spring plate has a central hole at its center along the axial direction of the coupling, with the centers of all the central holes located on the same axis. When there is an installation error, such as misalignment between the actuator and the angle measuring device shafts, or deviation between the central axes of the first and second couplings, the spring plate undergoes slight deformation to compensate. This elastic deformation effectively compensates for the deflection caused by the misalignment, thus effectively solving the problem of signal jumps in the angle measuring device. Furthermore, the first coupling has a first straight handle at its end facing the spring plate, and the second coupling has a second straight handle at its end facing the spring plate. The widths of both the first and second straight handles are adapted to the maximum width of the spring plate. Each of the first and second straight handles, as well as the spring plate, has a fixing hole containing a fastener for fixing the first and second couplings to the spring plate, respectively. This ensures that the first coupling, the second coupling, and the spring plate are securely connected together. When the shaft rotates in both directions, this tight connection and fit can eliminate the gaps between the components. During the rotation process, the coupling will not have obvious lag or gaps, avoiding the generation of backlash. The rotation angle signal collected by the angle measuring device is more accurate, and the data jump is reduced, thereby improving the reliability of the entire measurement system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the coupling provided in the embodiments of this application;

[0019] Figure 2 This is an exploded structural diagram of the coupling provided in the embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the working state of the coupling provided in the embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the deflection state of the coupling provided in the embodiments of this application.

[0022] In the diagram: 1. First coupling; 101. First straight shank; 2. Second coupling; 201. Second straight shank; 3. Spring plate; 4. Fixing hole; 5. Center hole; 6. Fixing element; 7. Step; 8. First clamp; 9. Second clamp; 10. Threaded hole; 11. Screw; 12. Straight groove; 13. Actuator; 14. Angle measuring device; 15. Set screw; 16. Protruding structure; 17. Washer; 18. Round hole. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0024] This application provides a coupling that can solve the technical problem in the prior art where slight axial deflection of the coupling leads to unstable signal acquisition and data jumps in the angle measuring device.

[0025] Figure 1 This is a schematic diagram of the coupling provided in an embodiment of this application. See also... Figure 1 The coupling provided in this application includes: a first coupling 1, a second coupling 2, and a spring plate 3 sandwiched between the first coupling 1 and the second coupling 2; wherein, the first coupling 1, the second coupling 2, and the spring plate 3 are all provided with a center hole 5 at the center along the axial direction of the coupling, and the center of each center hole 5 is located on the same axis. The first coupling 1 is provided with a first straight handle 101 at one end facing the spring plate 3, and the second coupling 2 is provided with a second straight handle 201 at one end facing the spring plate 3. The width of the first straight handle 101 and the second straight handle 201 is equal to the maximum width of the spring plate 3, and the first straight handle 101, the second straight handle 201, and the spring plate 3 are all provided with a fixing hole 4, and a fixing member 6 for fixing the first coupling 1 and the second coupling 2 to the spring plate 3 is provided in the fixing hole 4.

[0026] Specifically, the first coupling 1 is fixedly connected to the actuator 13, and the second coupling 2 is fixedly connected to the angle measuring device 14. When the equipment with the rotation function is running, the actuator 13 rotates and drives the shaft of the angle measuring device 14 to rotate through the coupling, and collects the rotation angle signal. When there is an installation error and the shafts of the actuator 13 and the angle measuring device 14 are not on the same axis, there will be a certain deviation between the central axes of the first coupling 1 and the second coupling 2. At this time, the spring plate 3 will undergo slight elastic deformation. This elastic deformation can effectively compensate for the deflection problem caused by the different axes, so that the coupling can adapt to the working conditions of different axes to a certain extent, and avoid signal acquisition instability and data jump phenomenon caused by coupling deformation.

[0027] Since both the first coupling 1 and the second coupling 2 have a center hole 5 at the center along the axial direction of the coupling, the center hole 5 provides a precise reference for the assembly process. By aligning the center holes 5, it can be ensured that the components of the coupling remain on the same axis during the assembly process, thereby improving the overall coaxiality quality of the assembly.

[0028] Figure 4 A schematic diagram illustrating the deflection state of the coupling provided in an embodiment of this application. See also... Figure 4 Due to the installation of the fixing hole 4 and the fixing piece 6, the first coupling 1, the second coupling 2, and the spring plate 3 can be firmly connected together. During forward and reverse rotation, this tight connection can eliminate the gaps between the components and avoid the generation of backlash. When the actuator 13 drives the coupling to rotate, the shaft of the angle measuring device 14 can follow the rotation in real time and accurately without lag or gap, thus ensuring the accurate acquisition of the rotation angle signal.

[0029] In this embodiment, the orthographic projection of the first straight handle 101 on the spring plate 3 and the orthographic projection of the second straight handle 201 on the spring plate 3 intersect perpendicularly to form a cross shape, and the orthographic projection of the fixing hole 4 on the first straight handle 101 on the spring plate 3 does not cover the orthographic projection of the fixing hole 4 on the second straight handle 201 on the spring plate 3.

[0030] Specifically, two fixing holes 4 can be respectively arranged at both ends of the first straight handle 101 and the second straight handle 201, and four fixing holes 4 can be circumferentially arranged on the spring piece 3, thereby further ensuring the connection stability between the first straight handle 101 and the second straight handle 201 and the spring piece 3. At the same time, the cross-sectional shapes of the first straight handle 101 and the second straight handle 201 are both rectangular. The orthographic projection of the first straight handle 101 on the spring piece 3 is perpendicularly crossed with the orthographic projection of the second straight handle 201 on the spring piece 3 to form a cross shape, and the widths of the first straight handle 101 and the second straight handle 201 are both equal to the maximum width of the spring piece 3. On the one hand, this can make the connection between the first straight handle 101 and the second straight handle 201 and the spring piece 3 more stable. On the other hand, when the coupling transmits torque, the force can be more evenly distributed on the spring piece 3, improving the efficiency and uniformity of force transmission.

[0031] Figure 2 is an exploded structural schematic diagram of the coupling provided by the embodiment of the present application. Refer to Figure 2 , in the embodiment of the present application, raised steps 7 are provided at both ends of the first straight handle 101 and the second straight handle 201 facing the spring piece 3, and the fixing holes 4 are located on the steps 7.

[0032] Specifically, due to the setting of the steps 7, there is a certain gap at the center between the first straight handle 101 and the second straight handle 201 and the spring piece 3, which provides space for the elastic deformation of the spring piece 3, enabling the spring piece 3 to deform more freely when subjected to torque or axial force, and thus better exerting the compensation function of the spring piece 3. At the same time, the gap at the center can reduce the contact area between the first straight handle 101 and the second straight handle 201 and the spring piece 3, thereby reducing the friction between the two, which helps the coupling to operate more smoothly.

[0033] Figure 3 is a working state schematic diagram of the coupling provided by the embodiment of the present application. Refer to Figure 3 , in the embodiment of the present application, the coupling further includes: a first clamp 8 and a second clamp 9 clamped at one end of the second coupling 2 away from the spring piece 3. The first clamp 8 and the second clamp 9 are both in a U-shaped structure. The inner walls of the first clamp 8 and the second clamp 9 are smooth arc surfaces, and the radian of the arc surface matches the radian of the outside of the second coupling 2.

[0034] Specifically, the first coupling 1 is pressed against the frame of the actuator 13 by set screws 15 on both sides, and the second coupling 2 is clamped to the shaft of the angle measuring device 14 by first clamp 8 and second clamp 9. Since both first clamp 8 and second clamp 9 have a U-shaped structure, when the first clamp 8 and second clamp 9 are engaged with the second coupling 2, axial movement and radial displacement of the coupling during operation can be prevented, thus improving the working stability of the coupling. In some other embodiments of this application, the opening size of the clamps can be adjusted to accommodate couplings of different diameters, thereby improving the versatility and adaptability of the coupling.

[0035] Furthermore, the first coupling 1, the second coupling 2, the spring plate 3, the first clamp 8, and the second clamp 9 can all be made of ordinary steel. Furthermore, the spring plate 3 can be made of thin spring steel strip. The first coupling 1, the second coupling 2, and the spring plate 3 can be effectively prevented from rusting by surface oxidation or other surface treatment methods.

[0036] In this embodiment of the application, connecting ears are symmetrically provided on both sides of the first clamp 8 and the second clamp 9. The connecting ears of the first clamp 8 are provided with round holes 18, and the connecting ears of the second clamp 9 are provided with threaded holes 10. The first clamp 8 and the second clamp 9 are connected by screws 11 that are sequentially inserted into the round holes 18 and the threaded holes 10.

[0037] Specifically, the symmetrically arranged connecting lugs and threaded holes 10 ensure that the clamping force is evenly distributed around the second coupling 2. The tightening degree of the screw 11 can be adjusted according to actual needs, thereby adapting to different shaft diameters and installation requirements. Among them, a washer 17 is provided between the screw 11 and the first clamp 8 and the second clamp 9 to protect the surfaces of the first clamp 8 and the second clamp 9 from direct pressure from the screw 11 and avoid surface damage.

[0038] In this embodiment, the outer wall of the second coupling 2 has multiple straight grooves 12 along the axial direction of the coupling. The spacing between the multiple straight grooves 12 is the same, and the gap width between the first clamp 8 and the second clamp 9 is greater than the width of a single groove 12.

[0039] Specifically, during the process of the first clamp 8 and the second clamp 9 clamping the second coupling 2, a certain gap is maintained between the first clamp 8 and the second clamp 9 and the second coupling 2. When the first clamp 8 and the second clamp 9 are tightened, the inner walls of the first clamp 8 and the second clamp 9 will apply pressure inward, causing the first clamp 8 and the second clamp 9 to undergo elastic deformation in the radial direction, thereby generating a clamping force, so that the first clamp 8 and the second clamp 9 clamp the second coupling 2.

[0040] The outer wall of the second coupling 2 has four straight grooves 12 along the axial direction of the coupling. When the first clamp 8 and the second clamp 9 are tightened, the second coupling 2 can deform inward through the straight grooves 12 to hold the rotating shaft of the angle measuring device 14, so that the coupling and the rotating shaft of the angle measuring device 14 form a tight whole, effectively preventing relative sliding or loosening between the coupling and the angle measuring device 14 during rotation, and ensuring the accuracy and stability of rotation.

[0041] In this embodiment, the second coupling 2 passes through the first clamp 8 and the second clamp 9. The portion of the second coupling 2 exposed in the first clamp 8 and the second clamp 9 is provided with a protruding structure 16, and the protruding structure 16 is in contact with the first clamp 8 and the second clamp 9.

[0042] Specifically, the protruding structure 16 limits the second coupling 2 in the axial direction, making it difficult for the second coupling 2 to move in the axial direction, thereby preventing it from falling out of the clamp, enhancing the connection strength, and improving the reliability of the coupling.

[0043] In this embodiment, the spring sheet 3 has an annular cross-sectional shape in the axial direction perpendicular to the first coupling 1, with a central hole 5 located at the center of the spring sheet 3. The spring sheet 3 has multiple fixing holes 4 arranged circumferentially, and the spacing between the fixing holes 4 is the same. In some other embodiments of this application, the spring sheet 3 has a rectangular cross-sectional shape in the axial direction perpendicular to the first coupling 1, with a central hole 5 located at the center of the spring sheet 3, and fixing holes 4 are provided on each side of the spring sheet 3. Specifically, as long as the tightness and stability of the connection between the spring sheet 3 and the first coupling 1 and the second coupling 2 are satisfied, the shape of the spring sheet 3 is not limited here.

[0044] In this embodiment, the fixing hole 4 is a riveting hole, the fixing member 6 is a rivet, and the first coupling 1 and the second coupling 2 are fixedly connected to the spring plate 3 by the rivet passing through the riveting hole. In some other embodiments of this application, other detachable connection methods may also be used, such as threaded connection, pin connection, clamping device connection, etc., which are not limited here.

[0045] In this embodiment, when there are installation errors, misalignment between the actuator 13 and the angle measuring device 14, and a small angle between the central axes of the first coupling 1 and the second coupling 2, the spring plate 3 undergoes slight deformation compensation. This elastic deformation effectively compensates for the deflection caused by the misalignment, thereby effectively solving the problem of signal jumps in the angle measuring device 14. Furthermore, the first coupling 1, the second coupling 2, and the spring plate 3 can be firmly connected together. When the shaft rotates in both directions, this tight connection and fit eliminates the gaps between the components. During the rotation in both directions, the coupling will not exhibit significant hysteresis or gaps, avoiding the generation of backlash. The rotation angle signal collected by the angle measuring device 14 is more accurate, and data jumps are reduced, thereby improving the reliability of the entire measurement system.

[0046] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0047] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A coupling, characterized in that, The coupling includes: A first coupling (1), a second coupling (2), and a spring plate (3) sandwiched between the first coupling (1) and the second coupling (2); wherein, the first coupling (1), the second coupling (2), and the spring plate (3) are all provided with a center hole (5) at the center of the coupling along the axial direction, and the center of each center hole (5) is located on the same axis. The first coupling (1) is provided with a first straight handle (101) at one end facing the spring plate (3), and the second coupling (2) is provided with a second straight handle (201) at one end facing the spring plate (3). The width of the first straight handle (101) and the second straight handle (201) is equal to the maximum width of the spring plate (3), and the first straight handle (101), the second straight handle (201), and the spring plate (3) are all provided with a fixing hole (4). The fixing hole (4) is provided with a fixing member (6) for fixing the first coupling (1) and the second coupling (2) to the spring plate (3) respectively.

2. The coupling according to claim 1, characterized in that, The orthographic projection of the first straight handle (101) on the spring plate (3) and the orthographic projection of the second straight handle (201) on the spring plate (3) are perpendicularly intersected in a cross shape, and the orthographic projection of the fixing hole (4) on the first straight handle (101) on the spring plate (3) does not cover the orthographic projection of the fixing hole (4) on the second straight handle (201) on the spring plate (3).

3. A coupling according to claim 1, characterized in that, The first straight handle (101) and the second straight handle (201) have raised steps (7) at both ends facing the spring sheet (3), and the fixing hole (4) is located on the step (7).

4. A coupling according to claim 1, characterized in that, The coupling also includes: A first clamp (8) and a second clamp (9) are engaged with the second coupling (2) at the end away from the spring plate (3). Both the first clamp (8) and the second clamp (9) have a zigzag structure. The inner walls of the first clamp (8) and the second clamp (9) are smooth arc surfaces, and the curvature of the arc surfaces matches the curvature of the outer side of the second coupling (2).

5. A coupling according to claim 4, characterized in that, The first clamp (8) and the second clamp (9) are symmetrically provided with connecting ears on both sides. The connecting ear of the first clamp (8) is provided with a round hole (18), and the connecting ear of the second clamp (9) is provided with a threaded hole (10). The first clamp (8) and the second clamp (9) are engaged and connected by screws (11) that are sequentially inserted into the round hole (18) and the threaded hole (10).

6. A coupling according to claim 5, characterized in that, The outer wall of the second coupling (2) has multiple straight grooves (12) along the axial direction of the coupling. The spacing between the multiple straight grooves (12) is the same, and the gap width between the first clamp (8) and the second clamp (9) is greater than the width of one of the straight grooves (12).

7. A coupling according to claim 4, characterized in that, The second coupling (2) passes through the first clamp (8) and the second clamp (9). The part of the second coupling (2) exposed in the first clamp (8) and the second clamp (9) is provided with a protruding structure (16), and the protruding structure (16) is in contact with the first clamp (8) and the second clamp (9).

8. A coupling according to claim 1, characterized in that, The spring sheet (3) has a circular cross-sectional shape in the axial direction perpendicular to the first coupling (1), and the central hole (5) is located at the center of the spring sheet (3). The spring sheet (3) has multiple fixing holes (4) along the circumference, and the spacing between the multiple fixing holes (4) is the same.

9. A coupling according to claim 1, characterized in that, The spring sheet (3) has a rectangular cross-sectional shape in the axial direction perpendicular to the first coupling (1), and the central hole (5) is located at the center of the spring sheet (3). Each side of the spring sheet (3) is provided with a fixing hole (4).

10. A coupling according to claim 1, characterized in that, The fixing hole (4) is a riveting hole, the fixing member (6) is a rivet, and the first coupling (1) and the second coupling (2) are fixedly connected to the spring plate (3) by the rivet passing through the riveting hole.

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