Variable coupling capable of transmitting torque
By introducing three sets of connecting components and elastic parts into the coupling, the problem of uneven force when the existing coupling encounters the raised parts in the grinding tool is solved, and the grinding faces the raised parts is realized The uniform contact and the stability of power transmission reduce damage to the grinding surface.
Patent Information
- Application Number
- CN202323654700.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The existing couplings cannot rebound when encountering a raised part in the grinding tool, resulting in uneven force on the grinding surface and easily causing damage.
A variable coupling capable of transmitting torque is designed, and the synchronous rotation of the first coupling member and the second coupling member is achieved through three sets of connecting components and the elastic member, and when encountering a raised part, the elastic member is passed through the elastic member. The elastic force pushes the second coupling away from the first coupling to maintain uniform contact between the grinding surface and the protruding part.
The smooth transition of the grinding faces of the protruding parts during the grinding process is achieved, which reduces damage to the grinding surface and ensures the continuity of power transmission.
Smart Images
Figure CN222185528U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a coupling, in particular to a variable coupling capable of transmitting torque. Background Art
[0002] The coupling is mainly used for connection in mechanical transmission. It is the main component in mechanical transmission. Its function is to connect the driving shaft and the driven shaft, or between the shaft and the rotating part, to transmit motion and torque. On the grinding machine, the power shaft and the rotating grinding part are connected by the coupling. The power shaft is connected to the rotating grinding part through the coupling to drive the rotating grinding part to rotate and grind the surface of the grinding object.
[0003] For example, patent CN2388402Y discloses a coupling, which includes a left coupling shaft, a right coupling shaft, and a sleeve. The sleeve is sleeved between the left coupling shaft and the right coupling shaft, and also includes a left spherical roller and a right spherical roller. The left coupling shaft and the right coupling shaft are processed with semicircular arc grooves distributed radially on the circumference, and both ends of the sleeve are processed with semicircular arc grooves that are equally divided with the left coupling shaft and the right coupling shaft. The left spherical roller is installed in a circular hole formed by the left coupling shaft and the corresponding semicircular arc grooves at the left end of the sleeve, and the right spherical roller is installed in a circular hole formed by the right coupling shaft and the corresponding semicircular arc grooves at the right end of the sleeve.
[0004] The couplings disclosed in the above patent cannot be extended or retracted. The couplings are installed on grinding tools such as grinders. When grinding the surface of an object, if there are raised parts on the surface of the object, the grinders and other grinding tools can only move as a whole to avoid them. Then the user presses the grinders and other grinding tools to grind the raised parts. During the grinding process, the grinding surface is easily damaged due to the unbalanced force. Utility Model Content
[0005] Based on the application of the above coupling on the grinding tool, when encountering a raised part on the surface of the object to be ground, the coupling does not have a rebound effect, and the grinding tool can only move as a whole to avoid it, and then the user presses down to grind. During the manual grinding process, the grinding surface is easily damaged due to the unbalanced force. The utility model provides a variable coupling that can transmit torque.
[0006] The technical solution adopted by the utility model to solve the above technical problems is: a variable coupling capable of transmitting torque, including a first coupling for connecting a power shaft, a second coupling for connecting a driven shaft and a connecting assembly, the connecting assembly is arranged between the first coupling and the second coupling to connect the first coupling and the second coupling so that the first coupling and the second coupling can rotate synchronously, the connecting assembly has three groups, the connecting assembly includes a first inner folding member and a second inner folding member, one end of the first inner folding member is hinged to the first coupling member, one end of the second inner folding member is hinged to the second coupling member, and the other end of the first inner folding member is hinged to the other end of the second inner folding member Hinged, three groups of first inner folding parts and second inner folding parts restrict the first coupling part and the second coupling part to move relative to each other in a straight line, and there is an angle between the first inner folding part and the second inner folding part, and an elastic part for providing a reset force is provided between the first coupling part and the second coupling part, when the second coupling part is subjected to force and moves toward the first coupling part, the elastic part is squeezed and elastically deformed, and the first inner folding part and the second inner folding part fold inward to reduce the angle, when the second coupling part loses force, the elastic part pushes the second coupling part to move to the side away from the first coupling part, and the first inner folding part and the second inner folding part open to increase the angle.
[0007] A further preferred technical solution of the utility model is: the first coupling and the second coupling are cylindrical, the axis line of the first coupling coincides with the axis line of the second coupling, and the three groups of first inner folding parts and second inner folding parts are evenly distributed along the circumference of the first coupling and the second coupling.
[0008] A further preferred technical solution of the utility model is that the elastic member is arranged as an integral whole between the first coupling member and the second coupling member.
[0009] A further preferred technical solution of the utility model is: the elastic part includes a first rebound part and a second rebound part which are separately arranged, and the first rebound part and the second rebound part are respectively fixed on the first coupling part and the second coupling part, and when the second coupling part is forced to move toward the first coupling part, the first rebound part and the second rebound part are in contact and squeezed and elastically deformed.
[0010] A further preferred technical solution of the utility model is that the elastic member is an elastic rubber member, a plurality of extension holes are arranged on the elastic rubber member, and the extension holes are opened along the direction of relative movement of the first coupling member and the second coupling member.
[0011] A further preferred technical solution of the present invention is that an angle limiting structure is provided between the first inner folding member and the second inner folding member to limit the maximum angle of opening.
[0012] A further preferred technical solution of the utility model is: the angle limiting structure includes limit card points respectively arranged on the first inner folding part and the second inner folding part, and when the limit card point on the first inner folding part abuts against the limit card point on the second inner folding part, the first inner folding part and the second inner folding part are restricted from rotating and opening.
[0013] A further preferred technical solution of the utility model is: the elastic member is a spring.
[0014] A further preferred technical solution of the utility model is: the first coupling and the second coupling are provided with notches for connecting with the shaft, and when the shaft is inserted into the notches and connected with the first coupling or the second coupling, the axis centerline of the shaft coincides with the axis centerline of the first coupling or the second coupling.
[0015] A further preferred technical solution of the utility model is: the first coupling comprises a first cylinder and a second cylinder of two sections with different diameters, the diameter of the first cylinder close to the second coupling is larger than the diameter of the second cylinder away from the second coupling, the first inner folding piece is hinged on the first cylinder, and the groove is arranged on the end face of the second cylinder; the second coupling comprises a third cylinder and a fourth cylinder of two sections with different diameters, the diameter of the third cylinder close to the first coupling is larger than the diameter of the fourth cylinder away from the first coupling, the second inner folding piece is hinged on the third cylinder, and the groove is arranged on the end face of the fourth cylinder.
[0016] Compared with the prior art, the utility model has the advantages that the first coupling and the second coupling are connected by three groups of connecting components, the connecting components include a first inner folding member and a second inner folding member, the three groups of the first inner folding member and the second inner folding member restrict the first coupling and the second coupling to move relative to each other in a straight line, so that the first coupling and the second coupling can still transmit torque during the relative movement, an elastic member for providing a reset force is provided between the first coupling and the second coupling, and the coupling is applied to a grinding tool, and the grinding surface of the grinding tool is When the surface of the object to be ground has a raised portion, the grinding surface is squeezed by the raised portion so that the second coupling can move closer to the first coupling, thereby allowing the grinding surface to float and pass smoothly over the raised portion. In this process, the elastic force of the elastic member pushes the second coupling to move to the side away from the first coupling so that the grinding surface is always pressed against the surface of the raised portion, and the coupling continuously transmits rotational power so that the grinding surface can quickly grind the raised portion flat. By applying force through the elastic force of the elastic member, the grinding surface can be subjected to more uniform force, thereby reducing damage to the grinding surface. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.
[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0019] Figure 2 It is a front view of the utility model;
[0020] Figure 3 The figure is a disassembled view of the first coupling, the connecting assembly and the second coupling;
[0021] Figure 4 It is a cutaway schematic diagram of the utility model;
[0022] Figure 5 A state diagram of the second coupling member after being subjected to force and moving closer to the first coupling member;
[0023] Figure 6 It is a schematic diagram of the first scheme of the angle limiting structure;
[0024] Figure 7 is a schematic diagram of the second scheme of the angle limiting structure;
[0025] Figure 8 This is a schematic diagram of the third scheme of the angle limiting structure.
[0026] In the figure: 1. second coupling member; 2. first coupling member; 3. connecting assembly; 4. elastic member; 5. notch; 6. first inner folding member; 7. second inner folding member; 8. first cylinder; 9. second cylinder; 10. first hinge seat; 11. first rebound part; 12. extension hole; 13. third cylinder; 14. fourth cylinder; 15. second hinge seat; 16. second rebound part; 17. limit card point; 18. arc limit groove; 19. sliding part; 20. opening groove. DETAILED DESCRIPTION
[0027] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.
[0028] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.
[0029] Figure 1-Figure 8 As shown, the variable coupling capable of transmitting torque comprises a first coupling member 2 for connecting a power shaft, a second coupling member 1 for connecting a driven shaft and a connecting assembly 3.
[0030] The connecting assembly 3 is disposed between the first coupling member 2 and the second coupling member 1 for connecting the first coupling member 2 and the second coupling member 1 so that the first coupling member 2 and the second coupling member 1 can rotate synchronously.
[0031] Figure 1-Figure 3 As shown, the connection assembly 3 has three groups, including a first inner folding member 6 and a second inner folding member 7, one end of the first inner folding member 6 is hinged to the first coupling member 2, one end of the second inner folding member 7 is hinged to the second coupling member 1, and the other end of the first inner folding member 6 is hinged to the other end of the second inner folding member 7. The three groups of the first inner folding member 6 and the second inner folding member 7 restrict the first coupling member 2 and the second coupling member 1 to move relative to each other on a straight line, and there is an angle between the first inner folding member 6 and the second inner folding member 7. During the relative movement of the first coupling member 2 and the second coupling member 1, the angle of the angle changes. Let the angle be α.
[0032] The three sets of connecting components 3 connecting the first coupling 2 and the second coupling 1 can effectively prevent the first coupling 2 and the second coupling 1 from shifting during use, making the linkage through the coupling more stable and better restricting the first coupling 2 and the second coupling 1 to move in a straight line.
[0033] Preferably, the first coupling 2 and the second coupling 1 are cylindrical, the axis line of the first coupling 2 coincides with the axis line of the second coupling 1, the three groups of first inner folding parts 6 and second inner folding parts 7 are evenly distributed along the circumference of the first coupling 2 and the second coupling 1, and the three groups of connecting components 3 limit the relative movement of the first coupling 2 and the second coupling 1 in the direction of the axis line.
[0034] Preferably, the first coupling 2 and the second coupling 1 are provided with a notch 5 for connecting with the shaft, and when the shaft is inserted into the notch 5 and connected with the first coupling 2 or the second coupling 1, the axis of the shaft coincides with the axis of the first coupling 2 or the second coupling 1. Preferably, the notch 5 is a hexagonal socket.
[0035] Figure 4As shown, preferably, the first coupling 2 includes two sections of a first cylinder 8 and a second cylinder 9 of different diameters, the diameter of the first cylinder 8 close to the second coupling 1 is larger than the diameter of the second cylinder 9 far from the second coupling 1, the first inner folding member 6 is hinged on the first cylinder 8, and the notch 5 is arranged at the end face center of the second cylinder 9, and the second coupling 1 includes two sections of a third cylinder 13 and a fourth cylinder 14 of different diameters, the diameter of the third cylinder 13 close to the first coupling 2 is larger than the diameter of the fourth cylinder 14 far from the first coupling 2, the second inner folding member 7 is hinged on the third cylinder 13, and the notch 5 is arranged on the end face of the fourth cylinder 14. Both the first coupling 2 and the second coupling 1 include two sections of cylinders of different diameters to ensure the depth of the notch 5.
[0036] Preferably, two first hinge seats 10 corresponding to the single first inner folding parts 6 are provided at the end face edge of the first cylinder 8, and there is a spacing between the two first hinge seats 10 for the first inner folding parts 6 to be inserted. After the first inner folding parts 6 are inserted between the two first hinge seats 10, they are connected through a hinge shaft.
[0037] Preferably, two second hinged seats 15 corresponding to the single second inner folding member 7 are provided at the end face edge of the third cylinder 13, and there is a spacing between the two second hinged seats 15 for the second inner folding member 7 to be inserted. After the second inner folding member 7 is inserted between the two second hinged seats 15, it is connected through a hinge shaft.
[0038] An elastic member 4 for providing a restoring force is arranged between the first coupling member 2 and the second coupling member 1 .
[0039] Preferably, the elastic member 4 is integrally arranged between the first coupling member 2 and the second coupling member 1. The elastic member 4 can be fixed on one of the opposite end faces of the first coupling member 2 or the second coupling member 1, or the two sides of the elastic member 4 can be fixedly connected to the first coupling member 2 and the second coupling member 1 on both sides respectively.
[0040] Or in another embodiment, preferably, the elastic member 4 includes a first rebound portion 11 and a second rebound portion 16 which are separately arranged, and the first rebound portion 11 and the second rebound portion 16 are respectively fixed to the first coupling member 2 and the second coupling member 1, and when the second coupling member 1 is forced to move toward the first coupling member 2, the first rebound portion 11 and the second rebound portion 16 are in contact and squeezed with each other and elastically deformed.
[0041] Figure 3 , Figure 4As shown, preferably, the elastic member 4 is an elastic rubber member, and a plurality of extension holes 12 are provided on the elastic rubber member. The extension holes 12 are opened along the direction of relative movement of the first coupling member 2 and the second coupling member 1. The extension holes 12 can change the elastic coefficient of the entire elastic member 4, that is, the elastic rubber member can be made softer. The elastic rubber member can be arranged as a whole between the first coupling member 2 and the second coupling member 1, or the elastic rubber member can be arranged in a divided manner between the first coupling member 2 and the second coupling member 1.
[0042] Preferably, the elastic member 4 is a spring. A mounting seat can be provided on the opposite surface of the first coupling member 2 and the second coupling member 1, and a positioning hole is provided on the mounting seat for inserting and positioning the end of the spring. The two ends of the elastic member are respectively inserted into the positioning holes on the mounting seats on both sides for positioning, and the spring support provides a reset force between the first coupling member 2 and the second coupling member 1.
[0043] Figure 5 As shown, when the second coupling 1 is subjected to force and moves toward the first coupling 2, the elastic member 4 is squeezed and elastically deformed, and the first inner folding member 6 and the second inner folding member 7 are folded inward to reduce the angle. When the second coupling 1 loses force, the elastic member 4 pushes the second coupling 1 to move to the side away from the first coupling 2, and the first inner folding member 6 and the second inner folding member 7 open to increase the angle.
[0044] The coupling is applied to a grinding tool. The first coupling member 2 of the coupling is connected to the power shaft of the grinding tool, and the second coupling member 1 is connected to the driven shaft with a grinding functional head. When the power shaft rotates, the driven shaft can be driven to rotate through the coupling. During the grinding process, when the grinding surface of the grinding functional head encounters a raised portion on the surface of the object to be ground, the grinding surface is squeezed by the raised portion so that the second coupling member 1 can move closer to the first coupling member 2, so that the grinding surface floats to adapt to the height of the raised portion, and the elastic member 4 is elastically deformed by the compression. The elastic force of the deformed elastic member 4 acts on the second coupling member 1 to push the second coupling member 1. The shaft member 1 moves toward the side away from the first coupling member 2, so that the grinding surface is always pressed against the surface of the raised part during the floating process, and the coupling always transmits the rotational power output by the power shaft to the driven shaft during the floating process of the grinding surface, so that the grinding surface is rotated and ground, so that the grinding surface can quickly grind the raised part flat. When the grinding tool encounters a raised part, the coupling structure does not require the entire grinding tool to retreat to adapt to the height of the raised part. It can be completed by elastically moving the second coupling member 1 backward, and the elastic force of the elastic member 4 is used to apply force to rebound, which can make the grinding surface more evenly stressed and reduce damage to the grinding surface.
[0045] In addition, an angle limiting structure is provided between the first inner folding member 6 and the second inner folding member 7 to limit the maximum angle between the first inner folding member 6 and the second inner folding member 7 when they are opened.
[0046] Figure 6As shown, preferably, the angle limiting structure includes limit card points 17 respectively arranged on the first inner folding part 6 and the second inner folding part 7. When the first inner folding part 6 and the second inner folding part 7 are opened, the limit card point 17 on the first inner folding part 6 abuts against the limit card point 17 on the second inner folding part 7 to limit the first inner folding part 6 and the second inner folding part 7 from continuing to rotate and open.
[0047] Figure 7 As shown, preferably, in another embodiment, the angle limiting structure includes an arc limiting groove 18 provided on the side wall of the second inner folding member 7 and a sliding portion 19 connected to the first inner folding member 6 and cooperating with the arc limiting groove 18. The sliding portion 19 is inserted into the arc limiting groove 18 and slides along the arc limiting groove 18. The center of the arc limiting groove 18 falls on the hinge point of the first inner folding member 6 and the second inner folding member 7. The maximum angle and the minimum angle of the angle between the first inner folding member 6 and the second inner folding member 7 are limited by the sliding portion 19 cooperating with the arc limiting groove 18.
[0048] Figure 8 As shown, preferably, in another embodiment, the angle limiting structure includes an open groove 20 provided on the first inner folding member 6, the open groove 20 having a groove 5 for inserting the end of the second inner folding member 7, one end of the second inner folding member 7 is inserted into the open groove 20 from the groove 5 and is hinged to the first inner folding member 6, the second inner folding member 7 rotates relative to the first inner folding member 6 in the groove 5, and the maximum angle and the minimum angle between the first inner folding member 6 and the second inner folding member 7 are limited by the edge of the groove 5.
[0049] The angle limiting structure is not limited to the above three structures, and other conventional structures are applicable to this patent.
[0050] The above is an introduction to the variable coupling capable of transmitting torque provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A variable coupling capable of transmitting torque, comprising a first coupling for connecting a power shaft, a second coupling for connecting a driven shaft, and a connecting assembly, wherein the connecting assembly is arranged between the first coupling and the second coupling to connect the first coupling and the second coupling so that the first coupling and the second coupling can rotate synchronously, characterized in that: The connecting component has three groups, including a first inner folding part and a second inner folding part, one end of the first inner folding part is hinged to the first coupling part, one end of the second inner folding part is hinged to the second coupling part, and the other end of the first inner folding part is hinged to the other end of the second inner folding part. The three groups of first inner folding parts and second inner folding parts limit the first coupling part and the second coupling part to move relative to each other on a straight line, and there is an angle between the first inner folding part and the second inner folding part. An elastic part for providing a reset force is provided between the first coupling part and the second coupling part. When the second coupling part is subjected to force and moves toward the first coupling part, the elastic part is squeezed and elastically deformed, and the first inner folding part and the second inner folding part fold inward to reduce the angle. When the second coupling part loses force, the elastic part pushes the second coupling part to move to the side away from the first coupling part, and the first inner folding part and the second inner folding part open to increase the angle.
2. The variable coupling capable of transmitting torque according to claim 1, characterized in that: The first coupling and the second coupling are cylindrical, the axis of the first coupling coincides with the axis of the second coupling, and the three groups of first inner folding parts and second inner folding parts are evenly distributed along the circumference of the first coupling and the second coupling.
3. The variable coupling capable of transmitting torque according to claim 1, characterized in that: The elastic member is arranged as a whole between the first coupling member and the second coupling member.
4. The variable coupling capable of transmitting torque according to claim 1, characterized in that: The elastic member includes a first rebound portion and a second rebound portion which are separately arranged, and the first rebound portion and the second rebound portion are respectively fixed to the first coupling member and the second coupling member. When the second coupling member is forced to move toward the first coupling member, the first rebound portion is contacted and squeezed with the second rebound portion and elastically deformed.
5. The variable coupling capable of transmitting torque according to claim 3 or 4, characterized in that: The elastic member is an elastic rubber member, and a plurality of extension holes are arranged on the elastic rubber member. The extension holes are opened along the direction in which the first coupling member and the second coupling member move relative to each other.
6. The variable coupling capable of transmitting torque according to claim 1, characterized in that: An angle limiting structure is provided between the first inner folding piece and the second inner folding piece to limit the maximum angle of opening.
7. The variable coupling capable of transmitting torque according to claim 6, characterized in that: The angle limiting structure includes limiting points respectively arranged on the first inner folding member and the second inner folding member. When the limiting point on the first inner folding member abuts against the limiting point on the second inner folding member, the first inner folding member and the second inner folding member are limited from rotating and opening.
8. The variable coupling capable of transmitting torque according to claim 1, characterized in that: The elastic member is a spring.
9. The variable coupling capable of transmitting torque according to claim 2, characterized in that: The first coupling and the second coupling are provided with notches for connecting with the shaft. When the shaft is inserted into the notch and connected with the first coupling or the second coupling, the axis center line of the shaft coincides with the axis center line of the first coupling or the second coupling.
10. The variable coupling capable of transmitting torque according to claim 9, characterized in that: The first coupling comprises a first cylinder and a second cylinder with two sections of different diameters, the diameter of the first cylinder close to the second coupling is larger than the diameter of the second cylinder far from the second coupling, the first inner folding piece is hinged on the first cylinder, and a groove is arranged on the end surface of the second cylinder, and the second coupling comprises a third cylinder and a fourth cylinder with two sections of different diameters, the diameter of the third cylinder close to the first coupling is larger than the diameter of the fourth cylinder far from the first coupling, the second inner folding piece is hinged on the third cylinder, and a groove is arranged on the end surface of the fourth cylinder.