Locking device for coupling assembly

Abstract

The utility model belongs to the technical field of couplings, and particularly relates to a locking device for coupling assembly, which comprises a driving shaft, a driven shaft arranged at one end of the driving shaft, a plurality of first limit grooves arranged at one end of the driven shaft, and first cushions fixedly mounted on the inner walls of the first limit grooves. First limiting rods are fixedly installed at the positions, located in the first limiting grooves, of one end of the driving shaft, a plurality of second limiting grooves are formed in one end of the driving shaft, second buffering pads are fixedly installed on the inner walls of the second limiting grooves, and second limiting rods are fixedly installed at the positions, located in the second limiting grooves, of one end of the driven shaft; dust cannot enter the connecting position of the driving shaft and the driven shaft, it is guaranteed that the driving shaft and the driven shaft cannot be seriously abraded due to the dust for a long time, the service life of the driving shaft and the service life of the driven shaft are prolonged, meanwhile, vibration and noise of the whole device can be reduced, and the influence on the working environment is reduced; and the service life of the equipment can be prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of coupling technology, and in particular relates to a locking device for coupling assembly. Background Technology

[0002] As a key mechanical component, couplings are used to connect two shafts to achieve synchronous rotation and transmit torque. They can compensate for axial, radial and angular displacements that may occur between the two shafts during installation and operation in equipment in many industries such as machinery manufacturing, power, metallurgy, petrochemicals, and transportation. They can also buffer and reduce vibration, protect equipment components from impact damage, and play a safety protection role in overload.

[0003] This patent has some drawbacks in its use, such as: common couplings are prone to dust accumulation between the driving and driven shafts during prolonged use. This dust causes increased wear on the mating surfaces due to the relative movement of the components during operation, affecting the coupling's accuracy and lifespan. Furthermore, common couplings generally use rigid connections, which can lead to vibration and noise, impacting the working environment. Therefore, we propose a locking device for coupling assembly. Utility Model Content

[0004] The purpose of this invention is to provide a locking device for coupling assembly, so as to solve the problems mentioned in the background art.

[0005] In view of this, the present invention provides a locking device for coupling assembly, comprising:

[0006] The drive shaft has a driven shaft at one end. A plurality of limiting grooves are formed at one end of the driven shaft. A buffer pad is fixedly installed on the inner wall of each limiting groove. A limiting rod is fixedly installed at one end of the drive shaft within each of the limiting grooves. A plurality of limiting grooves are also formed at one end of the drive shaft. A buffer pad is fixedly installed on the inner wall of each limiting groove. A limiting rod is fixedly installed at one end of the driven shaft within each of the limiting grooves. A rectangular groove is formed at one end of the driven shaft between the limiting grooves. A buffer pad is fixedly installed on the inner wall of the rectangular groove. A rectangular block is fixedly installed at one end of the drive shaft within the rectangular groove. A rubber pad is fixedly installed at one end of the drive shaft. A rubber pad is fixedly installed at one end of the driven shaft.

[0007] Protective shell one and protective shell two are respectively disposed on both sides of the drive shaft, and a sealing gasket is fixedly installed on the opposite side of each of the protective shell one and protective shell two.

[0008] A fastening assembly is located on the first protective shell and is used to fasten the first protective shell and the second protective shell.

[0009] In this technical solution, during installation, personnel can align one end of the driven shaft with one end of the driven shaft. At this time, the rectangular block on the driven shaft will be inserted into the rectangular groove, and several limit rods will be inserted into several limit grooves. Simultaneously, several limit rods will be inserted into several limit grooves until the rubber pad one at one end of the driven shaft contacts the rubber pad two at one end of the driven shaft. At this point, personnel can clamp the protective shell one and the protective shell two onto both sides of the driven shaft and the driven shaft. At this time, the sealing gaskets on the protective shell one and the protective shell two will be in contact with the periphery of the driven shaft and the driven shaft. Then, the protective shell one and the protective shell two are tightened by the fastening components to ensure that the two sealing gaskets can be tightly attached to the periphery of the driven shaft and the driven shaft. Under the sealing effect of the sealing gaskets, dust will not enter the connection between the driven shaft and the driven shaft, ensuring that the driven shaft and the driven shaft will not suffer significant wear due to dust over a long period of time, thereby extending the service life of the driven shaft and the driven shaft.

[0010] When the drive shaft rotates, it drives the rectangular block to rotate. Simultaneously, the drive shaft also drives several limit rods (first type) and several limit grooves (second type) to rotate. The rotation of the rectangular block drives the driven shaft to rotate through the rectangular grooves. Meanwhile, buffer pads (third type) cushion the rectangular block. The rotation of the limit rods (first type) drives the driven shaft to rotate through the limit grooves, and buffer pads (first type) cushion each limit rod (first type). Similarly, the rotation of the limit grooves (second type) drives the driven shaft to rotate through the limit rods (second type), and buffer pads (second type) cushion each limit rod (second type). Through the cushioning effect of buffer pads (third type), buffer pads (first type), and buffer pads (second type), the drive shaft and driven shaft maintain good transmission performance while reducing overall vibration and noise, minimizing the impact on the working environment, and extending the equipment's service life.

[0011] In the above technical solution, the fastening component further includes:

[0012] Two screw rods are inserted and installed on a protective shell. One end of each screw rod passes through the protective shell, the driven shaft, and the protective shell and is threaded with a nut. Two screw rods are inserted and installed on the protective shell. One end of each screw rod passes through the protective shell, the drive shaft, and the protective shell and is threaded with a nut.

[0013] In this technical solution, protective housing one and protective housing two can be secured to both sides of the drive shaft and driven shaft. At this time, the sealing gaskets on protective housing one and protective housing two will be in contact with the circumference of the drive shaft and driven shaft. Then, two screws one are inserted into protective housing one, so that one end of the two screws one passes through the driven shaft and protective housing two. Then, two nuts one are threaded onto one end of the two screws one respectively. Subsequently, two screws two are inserted into protective housing one, so that one end of the two screws two passes through the drive shaft and protective housing two. Then, two nuts two are threaded onto one end of the two screws one respectively. At one end of rod two, use a tool to tighten the two screws one and two screws two. At the same time, this will cause the protective shell one and protective shell two to move closer together. The movement of the protective shell one and protective shell two will squeeze the two sealing gaskets, causing them to deform slightly. This ensures that the two sealing gaskets can fit tightly against the periphery of the drive shaft and driven shaft. Under the sealing effect of the sealing gaskets, dust will not enter the connection between the drive shaft and driven shaft, ensuring that the drive shaft and driven shaft will not suffer significant wear due to dust over a long period of time, thereby extending the service life of the drive shaft and driven shaft.

[0014] In the above technical solution, the first screw is inserted into the driven shaft and the second protective shell, and the second screw is inserted into the drive shaft and the second protective shell.

[0015] In this technical solution, it is ensured that one end of screw one can be inserted into the driven shaft and the protective shell two, and that one end of screw two can be inserted into the drive shaft and the protective shell two.

[0016] In the above technical solution, the first limiting rod is inserted into the first limiting groove, the rectangular block is inserted into the rectangular groove, and the second limiting rod is inserted into the second limiting groove.

[0017] In this technical solution, it is ensured that the first limiting rod can be inserted into the first limiting groove, the rectangular block can be inserted into the rectangular groove, and the second limiting rod can be inserted into the second limiting groove.

[0018] In the above technical solution, both sealing gaskets are in close contact with the circumference of the drive shaft and the driven shaft, and the rubber gasket one and the rubber gasket two are in close contact.

[0019] In this technical solution, the two sealing gaskets are designed to seal between the drive shaft and the driven shaft, ensuring that dust does not enter between them.

[0020] In the above technical solution, further, the plurality of limiting rods one are distributed in a ring with equal spacing, and the plurality of limiting rods two are distributed in a ring with equal spacing.

[0021] In this technical solution, it is ensured that the force on several limiting rods is uniform and that the force on several limiting rods is uniform.

[0022] In the above technical solution, furthermore, the two sealing gaskets are in close contact on opposite sides.

[0023] In this technical solution, better sealing between the two sealing gaskets is ensured.

[0024] The beneficial effects of this utility model are:

[0025] 1. This locking device for coupling assembly, through the cooperation of the fastening components, protective shell one, protective shell two, sealing gasket, rubber gasket one, and rubber gasket two, ensures that dust will not enter the connection between the drive shaft and the driven shaft, and ensures that the drive shaft and the driven shaft will not suffer significant wear due to dust over a long period of time, thereby extending the service life of the drive shaft and the driven shaft.

[0026] 2. This locking device for coupling assembly, through the setting of limit rod one, limit groove two, rectangular block, rectangular groove, buffer pad three, limit groove one, buffer pad one, limit rod two, and buffer pad two, ensures that the driving shaft and driven shaft have good transmission effect, while also reducing the vibration and noise of the overall device, reducing the impact on the working environment, and extending the service life of the equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the overall explosion structure of this utility model;

[0029] Figure 3 This is a schematic diagram of the three-explosion structure of the buffer pad in this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the second buffer pad in this utility model when it explodes;

[0031] Figure 5 This is a schematic diagram of the structure of the sealing gasket exploding in this utility model.

[0032] The markings in the diagram are as follows:

[0033] 1. Driven shaft; 2. Driven shaft; 3. Limiting groove one; 4. Buffer pad one; 5. Limiting rod one; 6. Limiting groove two; 7. Buffer pad two; 8. Limiting rod two; 9. Rectangular groove; 10. Buffer pad three; 11. Rectangular block; 12. Protective shell one; 13. Protective shell two; 14. Sealing gasket; 15. Screw one; 16. Nut one; 17. Screw two; 18. Nut two; 19. Rubber pad one; 20. Rubber pad two. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0036] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0037] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0038] It should be noted that, in this application, 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 that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0039] Example 1:

[0040] Please see Figure 1 - Figure 5 As shown, this embodiment provides a locking device for coupling assembly, including:

[0041] A drive shaft 1 is provided at one end of the drive shaft 1, and a driven shaft 2 is provided at one end of the driven shaft 2. A plurality of limiting grooves 1 3 are provided at one end of the driven shaft 1, and a buffer pad 4 is fixedly installed on the inner wall of the limiting groove 1 3. A limiting rod 5 is fixedly installed at one end of the drive shaft 1 and within the plurality of limiting grooves 1 3. A plurality of limiting grooves 2 6 are provided at one end of the drive shaft 1, and a buffer pad 2 7 is fixedly installed on the inner wall of the limiting groove 2 6. A limiting rod 2 8 is fixedly installed at one end of the driven shaft 2 and within the plurality of limiting grooves 1 3. A rectangular groove 9 is provided at one end of the driven shaft 2 and between the plurality of limiting grooves 1 3. A buffer pad 3 10 is fixedly installed on the inner wall of the rectangular groove 9. A rectangular block 11 is fixedly installed at one end of the drive shaft 1 and within the rectangular groove 9. A rubber pad 19 is fixedly installed at one end of the drive shaft 1, and a rubber pad 20 is fixedly installed at one end of the driven shaft 2.

[0042] Protective housing 12 and protective housing 2 13 are respectively set on both sides of the drive shaft 1, and sealing gaskets 14 are fixedly installed on the opposite side of protective housing 12 and protective housing 2 13.

[0043] Fastening assembly, located on protective housing 12, and used to fasten protective housing 12 and protective housing 2 13.

[0044] During installation, personnel can align one end of the driven shaft 2 with one end of the driving shaft 1. At this time, the rectangular block 11 on the driving shaft 1 will insert into the rectangular groove 9, and several limiting rods 5 will be inserted into several limiting grooves 3. Simultaneously, several limiting rods 8 will be inserted into several limiting grooves 6, until the rubber pad 19 at one end of the driving shaft 1 contacts the rubber pad 20 at one end of the driven shaft 2. Then, personnel can secure the protective shells 12 and 13 to both sides of the driving shaft 1 and driven shaft 2. At this point, the protective... The sealing gaskets 14 on the first housing 12 and the second protective housing 13 will be in contact with the periphery of the drive shaft 1 and the driven shaft 2. Then, the first protective housing 12 and the second protective housing 13 will be fastened by the fastening assembly to ensure that the two sealing gaskets 14 can be tightly attached to the periphery of the drive shaft 1 and the driven shaft 2. Under the sealing effect of the sealing gaskets 14, dust will not enter the connection between the drive shaft 1 and the driven shaft 2, and the drive shaft 1 and the driven shaft 2 will not suffer from significant wear due to dust over a long period of time, thereby extending the service life of the drive shaft 1 and the driven shaft 2.

[0045] When the drive shaft 1 rotates, it drives the rectangular block 11 to rotate. Simultaneously, the drive shaft 1 also drives several limit rods 5 and several limit grooves 6 to rotate. The rotation of the rectangular block 11 drives the driven shaft 2 to rotate via the rectangular grooves 9. Meanwhile, the buffer pads 10 buffer the rectangular block 11. The rotation of the limit rods 5 drives the driven shaft 2 to rotate via the limit grooves 3, and the buffer pads 4 buffer each limit rod 5. The rotation of the limit grooves 6 drives the driven shaft 2 to rotate via the limit rods 8, and the buffer pads 7 buffer each limit rod 8. Through the buffering effects of the buffer pads 10, 4, and 7, the drive shaft 1 and driven shaft 2 maintain good transmission performance while reducing vibration and noise of the overall device, minimizing the impact on the working environment, and extending the equipment's service life.

[0046] Example 2:

[0047] This embodiment provides a locking device for coupling assembly. In addition to the technical solutions described in the above embodiments, it also has the following technical features: the fastening components include:

[0048] Two screws 15 are inserted and installed on the protective housing 12. One end of each screw 15 passes through the protective housing 12, the driven shaft 2, and the protective housing 13 and is threaded with a nut 16. Two screws 17 are inserted and installed on the protective housing 12. One end of each screw 17 passes through the protective housing 12, the drive shaft 1, and the protective housing 13 and is threaded with a nut 18.

[0049] The protective housing 12 and the protective housing 2 13 can be secured to both sides of the drive shaft 1 and the driven shaft 2. At this time, the sealing gaskets 14 on the protective housing 12 and the protective housing 2 13 will be in contact with the periphery of the drive shaft 1 and the driven shaft 2. Then, two screws 15 are inserted into the protective housing 12, so that one end of each screw 15 passes through the driven shaft 2 and the protective housing 2 13. Two nuts 16 are then threaded onto one end of each screw 15. Next, two screws 2 17 are inserted into the protective housing 12, so that one end of each screw 2 17 passes through the drive shaft 1 and the protective housing 2 13. Two nuts 2 18 are then threaded onto the two... Using a tool, tighten one end of screw 17 and the other two screws 15 and 17. This will cause the protective shells 12 and 13 to move closer together. The closer movement of the protective shells 12 and 13 will compress the two sealing gaskets 14, causing them to deform slightly. This ensures that the two sealing gaskets 14 can fit tightly against the periphery of the drive shaft 1 and the driven shaft 2. Under the sealing effect of the sealing gaskets 14, dust will not enter the connection between the drive shaft 1 and the driven shaft 2, ensuring that the drive shaft 1 and the driven shaft 2 will not suffer significant wear due to dust over a long period of time, thereby extending the service life of the drive shaft 1 and the driven shaft 2.

[0050] Example 3:

[0051] This embodiment provides a locking device for coupling assembly. In addition to the technical solution of the above embodiment, it also has the following technical features: screw 15 is inserted and engaged with driven shaft 2 and protective shell 2 13, and screw 2 17 is inserted and engaged with drive shaft 1 and protective shell 2 13.

[0052] Specifically, it is ensured that one end of screw 15 can be inserted into driven shaft 2 and protective shell 2 13, and that one end of screw 2 17 can be inserted into drive shaft 1 and protective shell 2 13.

[0053] Example 4:

[0054] This embodiment provides a locking device for coupling assembly. In addition to the technical solution of the above embodiment, it also has the following technical features: the first limiting rod 5 is inserted into the first limiting groove 3, the rectangular block 11 is inserted into the rectangular groove 9, and the second limiting rod 8 is inserted into the second limiting groove 6.

[0055] Specifically, it ensures that the limiting rod 5 can be inserted into the limiting groove 3, that the rectangular block 11 can be inserted into the rectangular groove 9, and that the limiting rod 8 can be inserted into the limiting groove 6.

[0056] Example 5:

[0057] This embodiment provides a locking device for coupling assembly. In addition to the technical solution of the above embodiment, it also has the following technical features: both sealing gaskets 14 are in close contact with the periphery of the driving shaft 1 and the driven shaft 2, and rubber gasket 19 and rubber gasket 20 are in close contact.

[0058] Specifically, the two sealing gaskets 14 are designed to seal between the drive shaft 1 and the driven shaft 2, ensuring that dust does not enter between them.

[0059] Example 6:

[0060] This embodiment provides a locking device for coupling assembly. In addition to the technical solution of the above embodiment, it also has the following technical features: a plurality of limiting rods 5 are distributed in a ring at equal intervals, and a plurality of limiting rods 8 are distributed in a ring at equal intervals.

[0061] In this process, it is ensured that the force on several limit rods 1 5 is uniform, and that the force on several limit rods 2 8 is uniform.

[0062] Example 7:

[0063] This embodiment provides a locking device for coupling assembly. In addition to the technical solution of the above embodiment, it also has the following technical features: the two sealing gaskets 14 are in close contact on opposite sides.

[0064] This ensures a better seal between the two sealing gaskets 14.

[0065] Working principle: During installation, the driven shaft 2 is aligned with one end of the driving shaft 1. The rectangular block 11 on the driving shaft 1 inserts into the rectangular groove 9, and several limiting rods 5 insert into several limiting grooves 3. Simultaneously, several limiting rods 8 insert into several limiting grooves 6 until the rubber pad 19 at one end of the driving shaft 1 contacts the rubber pad 20 at one end of the driven shaft 2. At this point, the protective shells 12 and 13 are secured to both sides of the driving shaft 1 and driven shaft 2. The sealing gaskets 14 on the protective shells 12 and 13 then come into contact with the periphery of the driving shaft 1 and driven shaft 2. Next, two screws 15 are inserted into the protective shell 12, so that one end of each screw 15 passes through the driven shaft 2 and the protective shell 13. Finally, two nuts 16 are threaded onto the screws 15. Then, insert two screws 17 into the protective housing 12, so that one end of the two screws 17 passes through the drive shaft 1 and the protective housing 13. Then, thread two nuts 18 onto one end of the two screws 17 respectively. Then, use a tool to tighten the two screws 15 and the two screws 17. At the same time, the protective housing 12 and the protective housing 13 will move closer to each other. The close proximity of the protective housing 12 and the protective housing 13 will squeeze the two sealing gaskets 14, causing the two sealing gaskets 14 to undergo slight deformation. This ensures that the two sealing gaskets 14 can be tightly attached to the periphery of the drive shaft 1 and the driven shaft 2. Under the sealing effect of the sealing gaskets 14, dust will not enter the connection between the drive shaft 1 and the driven shaft 2, ensuring that the drive shaft 1 and the driven shaft 2 will not suffer significant wear due to dust over a long period of time, thereby extending the service life of the drive shaft 1 and the driven shaft 2.

[0066] When the drive shaft 1 rotates, it drives the rectangular block 11 to rotate. Simultaneously, the drive shaft 1 also drives several limit rods 5 and several limit grooves 6 to rotate. The rotation of the rectangular block 11 drives the driven shaft 2 to rotate via the rectangular grooves 9. Meanwhile, the buffer pads 10 buffer the rectangular block 11. The rotation of the limit rods 5 drives the driven shaft 2 to rotate via the limit grooves 3, and the buffer pads 4 buffer each limit rod 5. The rotation of the limit grooves 6 drives the driven shaft 2 to rotate via the limit rods 8, and the buffer pads 7 buffer each limit rod 8. Through the buffering effects of the buffer pads 10, 4, and 7, the drive shaft 1 and driven shaft 2 maintain good transmission performance while reducing vibration and noise of the overall device, minimizing the impact on the working environment, and extending the equipment's service life.

[0067] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A locking device for shaft coupling assembly, characterized by, Include: The driving shaft (1) is provided with a driven shaft (2) at one end, a plurality of limiting grooves (3) are opened at one end of the driven shaft (2), the inner wall of the limiting groove (3) is fixedly installed with the buffer pad (4), the one end of the driving shaft (1) and the plurality of limiting grooves (3) are fixedly installed with the limiting rod (5), the one end of the driving shaft (1) is opened with a plurality of limiting grooves (6), the inner wall of the limiting groove (6) is fixedly installed with the buffer pad (7), the one end of the driven shaft (2) and the plurality of limiting grooves (6) are fixedly installed with the limiting rod (8), the one end of the driven shaft (2) and the plurality of limiting grooves (3) are opened with a rectangular groove (9), the inner wall of the rectangular groove (9) is fixedly installed with the buffer pad (10), the one end of the driving shaft (1) and the rectangular groove (9) are fixedly installed with the rectangular block (11), the one end of the driving shaft (1) is fixedly installed with the rubber pad (19), the one end of the driven shaft (2) is fixedly installed with the rubber pad (20); The protective shell (12) and the protective shell (2) are arranged on both sides of the driving shaft (1), and the protective shell (12) and the protective shell (2) are fixedly installed with the sealing pad (14) on the opposite side; The fastening assembly is located on the protective shell (12) and is used for fastening the protective shell (12) and the protective shell (2).

2. The locking device for shaft coupling assembly according to claim 1, wherein The fastening assembly comprises: Two screw rods (15) are inserted and connected to the protective shell (12), one end of the two screw rods (15) penetrates the protective shell (12), the driven shaft (2) and the protective shell (2), and is screwed with a nut (16), two screw rods (17) are inserted and connected to the protective shell (12), one end of the two screw rods (17) penetrates the protective shell (12), the driving shaft (1) and the protective shell (2), and is screwed with a nut (18).

3. The locking device for shaft coupling assembly according to claim 2, wherein The screw rod (15) is inserted and connected with the driven shaft (2) and the protective shell (2), and the screw rod (17) is inserted and connected with the driving shaft (1) and the protective shell (2).

4. The locking device for shaft coupling assembly according to claim 1, wherein The limiting rod (5) is inserted and connected with the limiting groove (3), the rectangular block (11) is inserted and connected with the rectangular groove (9), and the limiting rod (8) is inserted and connected with the limiting groove (6).

5. The locking device for shaft coupling assembly according to claim 1, wherein The two sealing pads (14) are in close contact with the circumferential side of the driving shaft (1) and the driven shaft (2), and the rubber pad (19) and the rubber pad (20) are in close contact.

6. The locking device for shaft coupling assembly according to claim 1, wherein A plurality of limiting rods (5) are annularly and equidistantly distributed, and a plurality of limiting rods (8) are annularly and equidistantly distributed.

7. The locking device for shaft coupling assembly according to claim 1, wherein The opposite sides of the two sealing pads (14) are in close contact.

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