Coupling and drive arrangement

Abstract

A kind of coupling and driving device, coupling includes adapter and two connecting pieces, adapter is equipped with adapter part, connecting piece is equipped with limiting part, adapter part and limiting part are connected, at least one set of mating surface of adapter part and limiting part is inclined surface;Two connecting pieces are also respectively equipped with first connecting part and second connecting part, first connecting part is connected with the first transmission shaft of driving device, second connecting part is connected with the second transmission shaft of driving device;Because at least one set of mating surface between adapter part and limiting part is inclined surface, compared with the rectangular mating surface of existing cross coupling, inclined surface can realize the close cooperation between adapter and connecting piece according to its inclination direction, and with the use of coupling, wear of adapter part and limiting part also further close based on the inclination direction of inclined surface, so that the close cooperation between adapter and connecting piece can be kept, the overall precision of coupling is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission, specifically to a coupling and a drive device. Background Technology

[0002] In the field of mechanical transmission, in order to achieve the driving connection between shafts, a coupling is usually used to connect the driving shaft and the driven shaft, so that the driving shaft can transmit torque to the driven shaft. The commonly used cross coupling usually includes an adapter and connecting parts arranged axially on both sides of the adapter. The connecting parts and the adapter are fitted by rectangular sliders and grooves. On the one hand, the production tolerance requirements are very high. On the other hand, as the operation continues, the fit between the adapter and the connecting parts will wear, which will reduce the overall accuracy of the coupling. Utility Model Content

[0003] The main technical problem this invention addresses is the high manufacturing tolerance requirements for couplings in related technologies, and the decreasing accuracy that occurs with use.

[0004] To address the aforementioned technical problems, this application provides a coupling for a drive device, comprising an adapter and two connecting members, wherein the two connecting members are respectively inserted into both sides of the adapter along its axial direction.

[0005] The adapter is provided with an adapter portion, and the connector is provided with a limiting portion. The adapter portion and the limiting portion are connected in a cooperative manner to restrict the mutual rotation between the adapter and the connector. At least one set of the mating surfaces of the adapter portion and the limiting portion are inclined surfaces.

[0006] The two connecting parts are also provided with a first connecting part and a second connecting part, the first connecting part being connected to the first drive shaft of the driving device, and the second connecting part being connected to the second drive shaft of the driving device.

[0007] In one embodiment, one of the connecting portion and the limiting portion is a protrusion, and the other is a groove for accommodating the protrusion; at least one set of adjacent mating surfaces of the groove and the protrusion are inclined surfaces.

[0008] In one embodiment, the protrusion and the groove are interlocked to form a clearance fit.

[0009] In one embodiment, the adapter is a protrusion, and the limiting part is a groove for accommodating the protrusion; there are two grooves and two protrusions, and the two grooves are symmetrically arranged about the axis of the connector. When the connector is connected to the adapter, the two protrusions and the two grooves are inserted into each other in a one-to-one correspondence.

[0010] In one embodiment, the first connecting portion has a first connecting hole, the second connecting portion has a second connecting hole, at least one of the first connecting hole and the second connecting hole is an irregularly shaped hole, and the shape of the end of the first drive shaft and / or the second drive shaft connected to the irregularly shaped hole matches the irregularly shaped hole.

[0011] In one embodiment, the contour surface of the irregular hole includes interconnected arc surfaces and limiting planes.

[0012] In one embodiment, the adapter has slots on both sides along its axial direction, the shape of the slots matching the shape of the end of the connector near the adapter, and the two connectors are respectively inserted into the two sides of the adapter through the two slots.

[0013] In one embodiment, the extension directions of the slots on both sides of the adapter are perpendicular to each other.

[0014] This application embodiment also provides a driving device, including a motor, an encoder and the above-mentioned coupling; the motor has a first drive shaft, the encoder has a second drive shaft, the first drive shaft is connected to the first connecting part, and the second drive shaft is connected to the second connecting part.

[0015] In one embodiment, the drive device includes an elastic element, on which the first drive shaft and / or the second drive shaft are sleeved, the elastic element being used to provide a preload force to the connector along the axial direction of the first drive shaft and / or the second drive shaft toward the adapter.

[0016] According to the coupling and drive device of the above embodiments, since at least one set of mating surfaces between the adapter and the limiting part is an inclined surface, compared with the rectangular mating surface of the existing cross coupling, the inclined surface can automatically achieve a tight fit between the adapter and the connecting part according to its tilt direction. Moreover, as the coupling is used, the wear of the adapter and the limiting part will also be further close based on the tilt direction of the inclined surface, thereby maintaining a tight fit between the adapter and the connecting part and ensuring the overall accuracy of the coupling. Attached Figure Description

[0017] Figure 1 This is an exploded view of the drive device structure in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the adapter structure in an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of the connector structure in an embodiment of this application.

[0020] Figure 4This is a schematic diagram of the adapter and connector mating in an embodiment of this application.

[0021] Figure 5 This is an exploded view of the drive device structure in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1-Adapter; 11-Adapter section; 12-Slot;

[0024] 2-Connector; 21-Limiting part; 22-First connecting part; 221-First connecting hole;

[0025] 3-Mating surfaces;

[0026] 41-Bump; 42-Groove;

[0027] 5-Motor; 51-First drive shaft;

[0028] 6-Encoder; 61-Second drive shaft;

[0029] 7-Elastic element. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0031] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0032] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0033] A coupling is a mechanical component used to connect a driving shaft and a driven shaft to rotate together. To reduce the machining precision required for the rectangular mating structure used in related technologies, and to address the problem of wear on the mating surfaces of the coupling during use, which reduces the overall precision of the coupling, this application provides a coupling for a drive device.

[0034] Please refer to Figures 1 to 4 The coupling includes an adapter 1 and two connecting parts 2, which are respectively inserted into both sides of the adapter 1 along its axial direction.

[0035] The adapter 1 is provided with an adapter part 11, and the connector 2 is provided with a limiting part 21. The adapter part 11 and the limiting part 21 are connected to each other to restrict the mutual rotation between the adapter 1 and the connector 2. At least one set of mating surfaces 3 of the adapter part 11 and the limiting part 21 are inclined surfaces.

[0036] The two connectors 2 are also provided with a first connecting part 22 and a second connecting part, respectively. The first connecting part 22 is connected to the first drive shaft 51 of the drive device, and the second connecting part is connected to the second drive shaft 61 of the drive device.

[0037] The coupling in this embodiment includes three main components: two connecting members 2 for connecting the objects, namely the first drive shaft 51 and the second drive shaft 61, and an adapter 1 disposed between the two connecting members 2. For the adapter 1, the two connecting members 2 are disposed on both sides of the adapter 1 along its axial direction, and the axial direction of the adapter 1 is consistent with the axial direction of the first drive shaft 51 and the second drive shaft 61.

[0038] To enable a mating connection between the adapter 1 and the connector 2, the adapter 1 is provided with a connecting part 11, and the connector 2 is provided with a limiting part 21, wherein the connecting part 11 and the limiting part 21 form a contact mating connection; based on the connection between the connecting part 11 and the limiting part 21, the relative rotation between the corresponding adapter 1 and connector 2 can be restricted, and on this basis, the coupling composed of the adapter 1 and the connector 2 can realize the transmission of torque.

[0039] In order to achieve automatic adjustment of the connection position between the adapter 11 and the limiting part 21, at least one set of mating surfaces 3 of the adapter 11 and the limiting part 21 are inclined surfaces, where "at least one set" refers to the surfaces adjacent to the adapter 11 and the limiting part 21. Since the mating surfaces 3 of the adapter 11 and the limiting part 21 have inclined surfaces, depending on the inclination direction of the inclined surfaces, when the adapter 11 and the limiting part 21 are in contact with each other, the adapter 1 and the connector 2 will automatically move closer to complete contact along the inclination direction of the inclined surfaces. Compared with the rectangular mating method, the connection mating through inclined surfaces can achieve close contact between the adapter 1 and the connector 2 with lower machining accuracy.

[0040] Furthermore, this tight contact can be automatically adjusted as the coupling is used. This is because as the coupling operates, the contact area between the connecting part 2 and the adapter 1, namely the mating surface 3 between the adapter 11 and the limiting part 21, will wear to a certain extent. When the mating surface 3 is an inclined surface, even if wear occurs, the adapter 11 and the limiting part 21 can continue to be in tight contact based on the inclined direction of the inclined surface, thereby preventing the coupling's operating accuracy from decreasing due to wear.

[0041] To connect to the first drive shaft 51 and the second drive shaft 61, each of the two connecting parts 2 is provided with a first connecting portion 22 and a second connecting portion, which are used to connect to the first drive shaft 51 and the second drive shaft 61, respectively. In this embodiment, one of the first drive shaft 51 and the second drive shaft 61 serves as the driving shaft to output torque, while the other serves as the driven shaft to receive torque. The coupling formed by the adapter 1 and the connecting part 2 is used to transmit the torque output by the driving shaft to the driven shaft.

[0042] In some alternative embodiments, in order to achieve the connection between the adapter 1 and the connector 2 and prevent relative rotation between the adapter 1 and the connector 2, one of the adapter part 11 and the limiting part 21 is a protrusion 41 and the other is a groove 42 for accommodating the protrusion 41; at least one set of adjacent mating surfaces 3 of the groove 42 and the protrusion 41 are inclined surfaces.

[0043] The adapter 11 can specifically be a protrusion 41, and the limiting part 21 corresponds to a groove 42 that accommodates the protrusion 41; or, the adapter 11 can specifically be a groove 42, and the limiting part 21 corresponds to a protrusion 41 that is inserted into the groove 42. In other words, the connection between the adapter 1 and the connector 2 in the embodiments of this application can be achieved by the adapter 11 and the limiting part 21, which are the protrusion 41 and the groove 42 respectively, cooperating with each other; and in the structure in which the adapter 11 and the limiting part 21 are cooperating with each other, at least one surface of the groove 42 and at least one surface of the protrusion 41 are both inclined surfaces, that is, the inclined surface of the groove 42 is the mating surface 3, and the inclined surface of the protrusion 41 is also the mating surface 3, and the two form a set of mating surfaces 3.

[0044] In this structure, the groove 42 and the protrusion 41 are interlocked to form a mating connection. The surfaces of the groove 42 and the protrusion 41 are in contact with each other, and can then approach each other to close contact based on the inclined direction of the slope. In this mating connection structure, in order to ensure the redundancy of relative movement between the protrusion 41 and the groove 42, and to avoid excessive movement range between the groove 42 and the protrusion 41, the interlocking of the protrusion 41 and the groove 42 can form a clearance fit. A clearance fit refers to a fit with a gap, including the case where the minimum gap is 0. In this case, the tolerance zone of the groove 42 is above the tolerance zone of the protrusion 41, that is, when the groove 42 and the protrusion 41 are mated, the size of the groove 42 is greater than or equal to the size of the protrusion 41.

[0045] In some optional embodiments, the adapter 11 can be a protrusion 41, and the limiting part 21 can be a groove 42 for accommodating the protrusion 41. In order to ensure the stability of the connection, there are two grooves 42 and two protrusions 41. The two grooves 42 are symmetrically arranged about the axis of the connector 2. When the connector 2 is connected to the adapter 1, the two protrusions 41 and the two grooves 42 are inserted into each other in a one-to-one correspondence.

[0046] There are two grooves 42 and two protrusions 41. This is based on the structure of mutual connection and cooperation between a single connector 2 and adapter 1. That is, there are two protrusions 41 on one side of the axial direction of adapter 1, and the connector 2 connected to the side of adapter 1 is provided with two grooves 42. For the entire adapter 1, since both sides of the adapter 1 are connected to a connector 2 in the axial direction, there are two protrusions 41 on each side of the adapter 1 in the axial direction. The entire adapter 1 is equivalent to having four protrusions 41.

[0047] The two protrusions 41 on the adapter 1 are symmetrically arranged along the axis of the adapter 1, where the axis refers to the center line of the adapter 1, and its extension direction is consistent with the axial direction of the adapter 1. The symmetrical arrangement of the two protrusions 41 along the axis is equivalent to the two protrusions 41 being set at both ends of the radial direction of the adapter 1. Based on the characteristics of the coupling, the adapter 1 and the connecting member 2 can actually undergo a certain degree of relative displacement in the radial direction to address the problem of the non-overlapping axis of the first drive shaft 51 and the second drive shaft 61. When the protrusions 41 are arranged in the radial direction of the adapter 1, and the corresponding grooves 42 are arranged in the radial direction of the connecting member 2, then the protrusions 41 can slide in the grooves 42 in the radial direction of the connecting member 2 to address the problem of the non-overlapping axis of the first drive shaft 51 and the second drive shaft 61.

[0048] Since each of the two sides of the adapter 1 is provided with a connector 2 in the axial direction, the positions of the protrusions 41 provided on both sides of the adapter 1 do not overlap. The line connecting the two protrusions 41 on one side is perpendicular to the line connecting the two protrusions 41 on the other side, forming a cross structure. Under this structure, the connector 2 provided on one side of the adapter 1 in the axial direction can be displaced relative to the adapter 1 in the x direction, and the connector 2 provided on the other side of the adapter 1 in the axial direction can be positioned relative to the adapter 1 in the y direction, where the x and y directions are perpendicular to each other. In this case, the problem that the center lines of the first drive shaft 51 and the second drive shaft 61 do not overlap within a certain range can be solved.

[0049] In some alternative embodiments, in order to form a fixed connection between the connecting part and the drive shaft and prevent relative rotation between the connecting part and the drive shaft, the first connecting part 22 is formed with a first connecting hole 221, and the second connecting part is formed with a second connecting hole. At least one of the first connecting hole 221 and the second connecting hole is an irregular hole, and the shape of the end of the first drive shaft 51 and / or the second drive shaft 61 connected to the irregular hole matches the irregular hole.

[0050] In this embodiment, the first connecting hole 221 and / or the second connecting hole are configured as irregularly shaped holes, and the end shapes of the corresponding first drive shaft 51 and / or second drive shaft 61 are configured to match the irregularly shaped holes. This avoids the problem of relative rotation between the connector 2 and the drive shaft that is prone to occur when using circular holes and circular ends. It also eliminates the need for an interference fit between the drive shaft and the connecting hole to prevent rotation, thereby reducing production precision requirements. The drive shaft referred to in this embodiment can be the first drive shaft 51 and / or the second drive shaft 61.

[0051] In some alternative embodiments, to form an irregularly shaped hole, the contour surface of the irregularly shaped hole includes interconnected arc surfaces and limiting planes. Furthermore, the irregularly shaped hole can be any non-circular hole, including rectangular, triangular, elliptical, etc., and these shapes of irregularly shaped holes can all achieve the purpose of preventing relative rotation between the connector 2 and the drive shaft.

[0052] In some alternative embodiments, in order to further improve the connection stability between the connector 2 and the adapter 1, the adapter 1 may also be provided with slots 12 on both sides along its axial direction. The shape of the slots 12 matches the shape of the end of the connector 2 near the adapter 1, and the two connectors 2 are respectively inserted into the two sides of the adapter 1 through the two slots 12.

[0053] The purpose of providing slots 12 is to enhance the connection stability between the adapter 11 and the connector 2, in conjunction with the adapter 11. Besides restricting the mutual rotation between the adapter 1 and the connector 2, it also further restricts the relative movement between the connector 2 and the adapter 1. Furthermore, multiple sets of slots 12 can be provided, with corresponding structures on the connector 2 matching the slots 12 to achieve a fixed connection between the connector 2 and the adapter 1. Specifically, the extension directions of the slots 12 on both sides of the adapter 1 can be perpendicular to each other, and the extension direction of the slot 12 on the upward side of the adapter 1 can be parallel to the line connecting the multiple protrusions 41 provided on that side.

[0054] This application provides a coupling in which at least one set of mating surfaces 3 between the adapter 11 and the limiting part 21 are inclined surfaces. Compared with the rectangular mating surfaces of existing cross couplings, the inclined surfaces can automatically achieve a tight fit between the adapter 1 and the connecting part 2 according to their inclination direction. Moreover, as the coupling is used, the adapter 11 and the limiting part 21 will wear further based on the inclination direction of the inclined surfaces, thereby maintaining a tight fit between the adapter 1 and the connecting part 2 and ensuring the overall accuracy of the coupling.

[0055] This application also provides a driving device in its embodiments; please refer to... Figure 5 The device includes a motor 5, an encoder 6, and a coupling as described in this embodiment. The motor 5 has a first drive shaft 51, and the encoder 6 has a second drive shaft 61. The first drive shaft 51 is connected to a first connecting part 22, and the second drive shaft 61 is connected to a second connecting part. The coupling in this embodiment enables a stable transmission connection between the encoder 6 and the motor 5 in the drive device, ensuring torque transmission stability.

[0056] In some alternative embodiments, in order to further enhance the connection reliability between the connector 2 and the adapter 1, the drive device may also include an elastic element 7, on which the first drive shaft 51 and / or the second drive shaft 61 are fitted with the elastic element 7. The elastic element 7 is used to provide the connector 2 with a preload force close to the adapter 1 along the axial direction of the first drive shaft 51 and / or the second drive shaft 61.

[0057] Because the elastic element 7 provides the connector 2 with a preload force that moves towards the adapter 1 along the axial direction of the first drive shaft 51 and / or the second drive shaft 61, the connector 2 tends to move toward the adapter 1. Moreover, there is at least one set of mutually cooperating inclined surfaces between the adapter 1 and the connector 2. During operation, the connector 2 continuously abuts against the adapter 1 under the action of the preload force, and the adapter 1 and the connector 2 are in close contact with each other through the inclined surface cooperation, thereby further ensuring the stability of operation.

[0058] Specifically, the elastic element 7 can be a compression spring sleeved on the first drive shaft 51 and / or the second drive shaft 61, which abuts against the connecting member 2, thereby providing an elastic preload to the connecting member 2. In this structure, the fit between the connecting member 2 and the drive shaft can be a clearance fit, allowing the connecting member 2 to undergo relative displacement relative to the drive shaft to a certain extent. Of course, the clearance between the connecting member 2 and the drive shaft will not cause relative rotation between the connecting member 2 and the drive shaft.

[0059] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A coupling for a drive device, characterized in that, It includes an adapter and two connectors, the two connectors being respectively inserted into both sides of the adapter along its axial direction; The adapter is provided with a connecting part, and the connector is provided with a limiting part. The connecting part and the limiting part are connected to each other to restrict the mutual rotation between the adapter and the connector. At least one set of mating surfaces of the connecting part and the limiting part are inclined surfaces. The two connecting parts are also provided with a first connecting part and a second connecting part, the first connecting part being connected to the first drive shaft of the driving device, and the second connecting part being connected to the second drive shaft of the driving device.

2. The coupling as described in claim 1, characterized in that, One of the connecting part and the limiting part is a protrusion, and the other is a groove for accommodating the protrusion; at least one set of adjacent mating surfaces of the groove and the protrusion are inclined surfaces.

3. The coupling as described in claim 2, characterized in that, The protrusion and the groove are inserted to form a clearance fit.

4. The coupling as described in claim 1, characterized in that, The adapter is a protrusion, and the limiting part is a groove for accommodating the protrusion; there are two grooves and two protrusions, and the two grooves are symmetrically arranged about the axis of the connector. When the connector is connected to the adapter, the two protrusions and the two grooves are inserted into each other in a one-to-one correspondence.

5. The coupling as described in any one of claims 1-4, characterized in that, The first connecting portion has a first connecting hole, and the second connecting portion has a second connecting hole. At least one of the first connecting hole and the second connecting hole is an irregularly shaped hole, and the shape of the end of the first drive shaft and / or the second drive shaft connected to the irregularly shaped hole matches the irregularly shaped hole.

6. The coupling as described in claim 5, characterized in that, The contour surface of the irregular hole includes interconnected arc surfaces and limiting planes.

7. The coupling as described in any one of claims 1-4, characterized in that, The adapter has slots on both sides along its axial direction. The shape of the slots matches the shape of the end of the connector near the adapter. The two connectors are inserted into the two sides of the adapter through the two slots respectively.

8. The coupling as described in claim 7, characterized in that, The extension directions of the slots on both sides of the adapter are perpendicular to each other.

9. A driving device, characterized in that, It includes a motor, an encoder, and a coupling as described in any one of claims 1-8; the motor has a first drive shaft, the encoder has a second drive shaft, the first drive shaft is connected to the first connecting portion, and the second drive shaft is connected to the second connecting portion.

10. The driving device as claimed in claim 9, characterized in that, The drive device includes an elastic element, and the first drive shaft and / or the second drive shaft are sleeved with the elastic element. The elastic element is used to provide a preload force to the connector along the axial direction of the first drive shaft and / or the second drive shaft, close to the adapter.

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