Overload protection coupling

Abstract

The utility model discloses an overload protection coupler which comprises a driven end coupler part and a driving end coupler part which are used for connecting a driven shaft and a driving shaft, the driven end coupler part comprises a driven end coupler, a first belleville spring piece and a first transmission disc which are connected in sequence, and the driven shaft is inserted into the middle of the driven end coupler and fixedly connected with the driven end coupler. The first belleville spring piece is installed on the back side of the first transmission disc. The driving end coupler part and the driven end coupler part are oppositely and symmetrically connected, the driving end coupler part comprises a driving end coupler, a second belleville spring piece and a second transmission disc which are sequentially connected, the driving shaft is inserted into the middle of the driving end coupler and fixedly connected with the driving end coupler, and the second belleville spring piece is installed on the back side of the second transmission disc. When the transmitted torque of the coupler exceeds a certain value, the coupler can be automatically disconnected, parts in a transmission system are prevented from being damaged due to overload, and the overload protection effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, and in particular to an overload protection coupling. Background Technology

[0002] The function of a coupling is to transmit torque and rotational motion between two shafts, ensuring a smooth transfer of power from the driving end to the driven end and guaranteeing the normal operation of mechanical equipment. Couplings are typically used to securely connect the driving and driven shafts in different mechanisms, allowing them to rotate together and transmit motion and torque. However, in actual transmission operations, there are application scenarios where two or more shafts need to be driven coaxially. Overloading of shafts in a transmission system can damage system components. To prevent damage to components in the transmission system due to overload, it is necessary to develop a new type of coupling to solve the aforementioned technical problems. Utility Model Content

[0003] The technical problem this application aims to solve is that couplings are prone to component damage due to overload during actual transmission operations.

[0004] To address the aforementioned technical problems, this application provides an overload protection coupling, comprising a driven-end coupling section and a drive-end coupling section for connecting a driven shaft and a drive shaft. The driven-end coupling section includes a driven-end coupling, a first butterfly spring plate, and a first transmission disc connected in sequence. The driven shaft is inserted into the middle of the driven-end coupling and fixedly connected thereto. The first butterfly spring plate is installed on the back side of the first transmission disc and fixed to the connection end of the driven shaft connecting to the drive shaft. The drive-end coupling section is symmetrically connected to the driven-end coupling section. The drive-end coupling section includes a drive-end coupling, a second butterfly spring plate, and a second transmission disc connected in sequence. The drive shaft is inserted into the middle of the drive-end coupling and fixedly connected thereto. The second butterfly spring plate is installed on the back side of the second transmission disc and fixed to the connection end of the drive shaft connecting to the driven shaft. The first transmission disc and the second transmission disc mesh to transmit torque. When the load on the driven end is too high, the meshing first transmission disc and the second transmission disc undergo relative displacement, thereby disconnecting the connection.

[0005] According to an embodiment of this application, the first transmission disk and the second transmission disk have the same shape and specifications, both being circular disks.

[0006] According to an embodiment of this application, both the first transmission disk and the second transmission disk have transmission teeth on their opposing sides. The first transmission disk and the second transmission disk mesh with each other through the transmission teeth, which are evenly arranged along the circumference of the edge of the transmission disk surface.

[0007] According to an embodiment of this application, the transmission tooth is a cube with a trapezoidal cross-section that is narrower at the top and wider at the bottom.

[0008] According to an embodiment of this application, the first transmission disc and the transmission gear are integrally formed, and the second transmission disc and the transmission gear are also integrally formed.

[0009] According to an embodiment of this application, the first butterfly spring plate and the first transmission disc are fixed to the driven end coupling by countersunk fastening bolts, and the second butterfly spring plate and the second transmission disc are also fixed to the drive end coupling by countersunk fastening bolts.

[0010] According to an embodiment of this application, the driven shaft and the driven end coupling are fixedly connected by a transmission key, and the drive shaft and the drive end coupling are also fixedly connected by a transmission key.

[0011] According to an embodiment of this application, both the first and second butterfly spring sheets are circular in shape, and both the first and second butterfly spring sheets are provided with mounting holes.

[0012] According to an embodiment of this application, the drive-end coupling is located in an engagement direction substantially orthogonal to the driven shaft for engagement with the driven-end coupling.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] 1. In this application, the driven end coupling connecting the driven shaft and the driving end coupling connecting the drive shaft are connected by meshing to transmit torque. A transmission disc is fixed to the coupling, and a disc-shaped spring is provided between the disc and the coupling. The side of the disc away from the spring is also provided with transmission teeth, and the two discs mesh with each other through these teeth. When the load on the driven end is too high, relative displacement will occur between the two transmission teeth. This relative displacement will increase the axial distance between the two discs and increase the pressure on the disc-shaped springs. When the load exceeds a certain limit, the two transmission teeth will eventually disengage, preventing the two discs from contacting and thus avoiding overload damage to the drive motor. A key feature of this coupling is that it automatically disconnects when the transmitted torque exceeds a certain value, preventing damage to components in the transmission system due to overload and providing overload protection.

[0015] 2. This application can appropriately select a disc spring, which can change the spring constant, thereby adjusting the overload protection limit value of the drive end. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0017] Figure 1 This is a front view of an overload protection coupling as an example of this utility model;

[0018] Figure 2 for Figure 1 Cross-sectional view along the AA direction;

[0019] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0020] Figure 4 This is a front view of the first butterfly spring sheet in this example of the present invention;

[0021] Figure 5 This is a cross-sectional view of the first butterfly spring sheet in this utility model example.

[0022] The annotations in the attached figures are explained as follows:

[0023] 1. Countersunk fastening bolt; 2. First butterfly spring plate; 3. First transmission disc; 4. Transmission gear; 5. Drive shaft; 6. Drive end coupling; 7. Driven end coupling; 8. Driven shaft; 9. Transmission key; 10. Second butterfly spring plate; 11. Second transmission disc. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains. The terms “first,” “second,” and similar terms used in the specification and claims of this patent application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a,” and similar terms, do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0026] according to Figures 1 to 5 As shown, an overload protection coupling according to an example of this application includes a driven end coupling section and a drive end coupling section for connecting the driven shaft 8 and the drive shaft 5. The driven end coupling section and the drive end coupling section are connected by meshing. When the load on the driven end is too large, the meshing transmission teeth 4 will undergo relative displacement. When the load exceeds a certain limit, the two transmission teeth 4 will eventually disengage, thereby preventing the driven shaft 8 and the drive shaft 5 from transmitting torque, thus avoiding overload damage to the motor on the drive end.

[0027] In this embodiment, as Figure 1 As shown, the driven end coupling includes a driven end coupling 7, a first butterfly spring plate 2 and a first transmission disk 3 connected in sequence. The driven shaft 8 is inserted into the middle of the driven end coupling 7 and fixedly connected to it. The first butterfly spring plate 2 is installed on the back side of the first transmission disk 3 and fixed to the connection end of the driven shaft 8 that connects to the drive shaft 5.

[0028] Specifically, the driven shaft 8 and the driven end coupling 7 are fixedly connected by a transmission key 9. The inner wall of the driven end coupling 7 is provided with a keyway, and the transmission key 9 is embedded in the keyway to achieve circumferential fixation between the coupling and the driven shaft 8.

[0029] Specifically, the disc spring has excellent elastic properties, enabling it to store and release energy when subjected to impact or vibration, thus playing a role in buffering and damping. When the load on the driven end is too large, the presence of the first disc spring 2 can buffer the pressure between the driven end coupling 7 and the first transmission disc 3. Compared with other types of springs, the disc spring occupies less space under the same load-bearing capacity.

[0030] Specifically, the first butterfly spring plate 2 and the first transmission disc 3 are provided with evenly arranged mounting holes. The first butterfly spring plate 2 and the first transmission disc 3 are fixed to the driven end coupling 7 by countersunk fastening bolts 1. That is, the countersunk fastening bolts 1 pass through the mounting holes of the first butterfly spring plate 2 and the first transmission disc 3, thereby fixing them together to the joint end of the driven end coupling 7.

[0031] In this embodiment, the drive-end coupling section and the driven-end coupling section are symmetrically connected to each other. The drive-end coupling section includes a drive-end coupling 6, a second butterfly spring plate 10, and a second transmission disk 11 connected in sequence. The drive shaft 5 is inserted into the middle of the drive-end coupling 6 and fixedly connected to it. The second butterfly spring plate 10 is installed on the back side of the second transmission disk 11 and fixed to the connection end of the drive shaft 5 connecting to the driven shaft 8.

[0032] Specifically, such as Figure 1 , Figure 2 , Figure 3 As shown, both the first transmission disk 3 and the second transmission disk 11 have transmission teeth 4 on their facing sides. The first transmission disk 3 and the second transmission disk 11 mesh with each other through the transmission teeth 4, which are evenly arranged along the circumference of the edge of the transmission disk surface. Preferably, the transmission teeth 4 are cubic with a trapezoidal cross-section that is narrower at the top and wider at the bottom.

[0033] Specifically, the drive-end coupling 6 is located in an engagement direction substantially orthogonal to the driven shaft 8, so as to engage with the driven-end coupling 7.

[0034] Specifically, the drive shaft 5 and the drive end coupling 6 are fixedly connected by a transmission key 9. The inner wall of the drive end coupling 6 is provided with a keyway, and the transmission key 9 is embedded in the keyway to achieve circumferential fixation between the coupling and the drive shaft 5.

[0035] Specifically, the first transmission disc 3 and the second transmission disc 11 have the same shape and specifications, and can preferably be circular discs. The main structure of the transmission disc is a circular disc, and transmission teeth 4 can be milled on one side of the disc. Therefore, the first transmission disc 3 and the transmission teeth 4 are integrally formed, and the second transmission disc 11 and the transmission teeth 4 are also integrally formed.

[0036] Specifically, the second butterfly spring plate 10 and the second transmission disk 11 are provided with evenly arranged mounting holes. The second butterfly spring plate 10 and the second transmission disk 11 are fixed to the driven end coupling 7 by countersunk fastening bolts 1. That is, the countersunk fastening bolts 1 pass through the mounting holes of the second butterfly spring plate 10 and the second transmission disk 11, thereby fixing them together to the joint end of the drive end coupling 6.

[0037] The first transmission disc 3 meshes with the second transmission disc 11 to transmit torque; when the load on the driven end is too large, the meshing first transmission disc 3 and the second transmission disc 11 undergo relative displacement and thus disconnect.

[0038] Specifically, both the first butterfly spring plate 2 and the second butterfly spring plate 10 are circular in shape, and both the first butterfly spring plate 2 and the second butterfly spring plate 10 are provided with mounting holes.

[0039] The working principle of an overload protection coupling in this embodiment is as follows: Under normal operating conditions, the drive-end coupling 6 drives the transmission disc via the countersunk bolt 1. The transmission teeth 4 of the transmission disc mesh with the driven-end transmission teeth 4 to transmit torque, and there is no mutual movement between the two transmission teeth 4. When the load on the driven end is too large, a relative displacement will occur between the two transmission teeth 4. This relative displacement will increase the axial distance between the two transmission discs, and the pressure on the disc springs on both sides will also increase. When the load exceeds a certain limit, the two transmission teeth 4 will eventually disengage, preventing the two transmission discs from contacting each other, thus avoiding overload damage to the drive-end motor. By appropriately selecting disc springs, the spring constant can be changed, thereby adjusting the overload protection limit value of the drive end.

[0040] In summary, the technical solution of this application has the following beneficial effects:

[0041] 1. In this application, the driven end coupling connecting the driven shaft and the driving end coupling connecting the drive shaft are connected by meshing to transmit torque. A transmission disc is fixed to the coupling, and a disc-shaped spring is provided between the disc and the coupling. The side of the transmission disc away from the disc-shaped spring also has transmission teeth, and the two transmission discs mesh with each other through these teeth. When the load on the driven end is too high, relative displacement will occur between the two transmission teeth. This relative displacement will increase the axial distance between the two transmission discs and increase the pressure on the disc-shaped springs on both sides. When the load exceeds a certain limit, the two transmission teeth will eventually disengage, preventing the two transmission discs from contacting and thus avoiding overload damage to the drive motor. A key feature of this coupling is that it automatically disconnects when the transmitted torque exceeds a certain value, preventing damage to components in the transmission system due to overload and providing overload protection.

[0042] 2. This application can appropriately select a disc spring, which can change the spring constant, thereby adjusting the overload protection limit value of the drive end.

[0043] The above are merely exemplary embodiments of this application and are not intended to limit the scope of protection of this application, which is determined by the appended claims.

Claims

1. An overload protection coupling, characterized in that, Includes a driven-end coupling section and a drive-end coupling section for connecting the driven shaft and the drive shaft. The driven end coupling includes a driven end coupling, a first butterfly spring plate, and a first transmission disk connected in sequence. The driven shaft is inserted into the middle of the driven end coupling and fixedly connected thereto. The first butterfly spring plate is installed on the back side of the first transmission disk and fixed to the connection end of the driven shaft that connects to the drive shaft. The drive-end coupling and the driven-end coupling are symmetrically connected to each other. The drive-end coupling includes a drive-end coupling, a second butterfly spring plate, and a second transmission disk connected in sequence. The drive shaft is inserted into the middle of the drive-end coupling and fixedly connected to it. The second butterfly spring plate is installed on the back side of the second transmission disk and fixed to the connection end of the drive shaft connecting to the driven shaft. The first transmission disc meshes with the second transmission disc to transmit torque; when the load on the driven end is too large, the meshing first transmission disc and the second transmission disc undergo relative displacement, thereby disconnecting the connection.

2. The overload protection coupling according to claim 1, characterized in that, The first and second transmission discs have the same shape and specifications, both being circular discs.

3. The overload protection coupling according to claim 2, characterized in that, The first and second transmission disks are provided with transmission teeth on their opposite sides. The first and second transmission disks mesh with each other through the transmission teeth, which are evenly arranged along the circumference of the edge of the transmission disk surface.

4. An overload protection coupling according to claim 3, characterized in that, The transmission gear is a cube with a trapezoidal cross-section that is narrower at the top and wider at the bottom.

5. An overload protection coupling according to claim 3, characterized in that, The first transmission disc and the transmission gear are integrally formed, and the second transmission disc and the transmission gear are also integrally formed.

6. An overload protection coupling according to claim 2, characterized in that, The first butterfly spring and the first transmission disc are fixed to the driven end coupling by countersunk bolts, and the second butterfly spring and the second transmission disc are also fixed to the drive end coupling by countersunk bolts.

7. An overload protection coupling according to claim 2, characterized in that, The driven shaft and the driven end coupling are fixedly connected by a transmission key, and the drive shaft and the drive end coupling are also fixedly connected by a transmission key.

8. An overload protection coupling according to claim 2, characterized in that, Both the first and second butterfly spring sheets are circular in shape, and both have mounting holes.

9. An overload protection coupling according to claim 2, characterized in that, The drive-end coupling is located in an engagement direction substantially orthogonal to the driven shaft for engagement with the driven-end coupling.

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