Coupler spline locking device

Abstract

The utility model discloses a coupler spline locking device, and particularly relates to the technical field of coupler spline locking, the coupler spline locking device comprises an internal spline shaft hub, an internal spline tooth part is fixedly embedded in the front end of the internal spline shaft hub, a mounting hole is formed in the front end of the internal spline shaft hub and is arranged above the internal spline tooth part, a pressing plate is arranged in the mounting hole, and the pressing plate is connected with the internal spline tooth part. Two first threaded holes distributed front and back are formed in the outer wall of the top of the inner spline shaft hub, the interiors of the two first threaded holes are in threaded connection with set screws, and the bottoms of the set screws make contact with the top of the pressing plate. According to the utility model, the pressing plate is extruded by the set screw, and pressure is applied above the internal spline tooth part by using the pressing plate, so that the internal spline shaft hub at the mounting hole is tightly attached to the spline shaft tooth part, the internal spline shaft hub is prevented from moving during rotation, the pressure of the internal spline shaft hub can be uniformly transmitted, and meanwhile, the internal spline shaft hub can be prevented from moving and being abraded; the service life of the inner spline shaft hub can be prolonged, and the use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coupling spline locking, and more specifically to a coupling spline locking device. Background Art

[0002] A coupling spline locking device is an important component for connecting two shafts and transmitting torque. The coupling spline locking device usually consists of the following parts: spline shaft: a shaft with splines, which is used to cooperate with the spline sleeve on another shaft to achieve torque transmission; spline sleeve: a sleeve that cooperates with the spline shaft, with spline grooves inside, and can be tightly combined with the spline shaft; locking mechanism: used to firmly lock the spline shaft and the spline sleeve together to prevent loosening during operation. The locking mechanism can adopt various forms, such as nut locking, bolt locking, clamping devices, etc. The working principle of the coupling spline locking device is to transmit torque through the spline fit between the spline shaft and the spline sleeve. When two shafts need to be connected, the spline shaft is inserted into the spline sleeve, and then the two are firmly locked together through the locking mechanism. During operation, the torque is transmitted through the engagement of the splines, causing the two shafts to rotate synchronously.

[0003] For example, a coupling spline locking device with the publication number of CN211343776U in the prior art. This utility model has a simple and reliable structure, avoids machining fastening bolt holes at the shaft end of the transmission shaft, has reliable locking, and can eliminate fretting wear between the external spline of the transmission shaft and the internal spline of the coupling; the structure is circumferentially symmetrical and has reliable positioning, and can be used for high-speed transmission shafts.

[0004] However, the above-mentioned prior art still has the following problems when in use: when the traditional coupling spline locking device is connected to the spline shaft, it is usually fixed with fastening bolts. The connection between the internal spline shaft hub and the spline shaft is not tight, resulting in easy axial movement of the internal spline shaft hub, which will further increase the wear of the internal spline shaft hub and reduce the service life of the internal spline shaft hub. Based on this, the utility model provides a coupling spline locking device with close fit and low wear. Summary of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a coupling spline locking device. By using a set screw to squeeze the pressure plate to apply pressure above the internal spline tooth part, the internal spline shaft hub can be tightly fitted with the spline tooth part of the spline shaft, the pressure is evenly transmitted, and the fastening bolts are used to fix the spline tooth part of the spline shaft and the internal spline shaft hub to prevent the axial movement of the internal spline shaft hub, which may cause premature wear of the internal spline shaft hub, thereby improving the service life of the internal spline shaft hub to solve the problems presented in the above background art.

[0006] To achieve the above object, the present utility model provides the following technical solution: A coupling spline locking device includes an internal spline shaft hub. The front end of the internal spline shaft hub is fixedly embedded with an internal spline tooth portion. An installation hole is provided at the front end of the internal spline shaft hub, and the installation hole is located above the internal spline tooth portion. A pressing plate is arranged inside the installation hole. Two first threaded holes distributed front and rear are provided on the outer wall of the top of the internal spline shaft hub. Threaded connection of set screws is provided in both of the two first threaded holes. The bottom of the set screw contacts the top of the pressing plate. When the set screw is tightened, the set screw pushes the pressing plate downward, providing a downward pressure, thereby being able to improve the tightness when the internal spline shaft hub is connected to the spline shaft. A circular baffle is fixedly provided at the rear end of the internal spline shaft hub. A fastening bolt passes through the circular baffle, and the fastening bolt is threadedly connected to the circular baffle. The fastening bolt is provided to connect the internal spline shaft hub to the spline shaft, thereby improving the connection firmness of the internal spline shaft hub.

[0007] In a preferred embodiment, a spline shaft tooth portion is arranged inside the internal spline tooth portion. The spline shaft tooth portion is inserted into the spline shaft tooth portion for connecting the internal spline shaft hub and the spline shaft tooth portion for use together. And a plurality of teeth on the inner wall of the internal spline tooth portion are engaged with a plurality of teeth on the outer wall of the spline shaft tooth portion, thereby being able to further improve the tight fit between the spline shaft tooth portion and the internal spline tooth portion, and further improving the connection firmness between the internal spline shaft hub and the spline shaft tooth portion.

[0008] In a preferred embodiment, a snap ring is arranged at the front end of the circular baffle. The snap ring is arranged at the rear end of the spline shaft tooth portion. The snap ring can play a buffering role between the spline shaft tooth portion and the circular baffle.

[0009] In a preferred embodiment, a second threaded hole is provided at the rear end of the spline shaft tooth portion. The front end of the fastening bolt extends into the second threaded hole and is threadedly connected to the second threaded hole. The spline shaft tooth portion is fixed by the fastening bolt, thereby being able to avoid axial movement of the internal spline shaft hub and resulting in wear.

[0010] In a preferred embodiment, the cross-section of the installation hole is set to be dumbbell-shaped for placing the pressing plate. At the same time, using two set screws facilitates pushing the pressing plate to apply a downward force, so that the internal spline shaft hub is in tight fit with the spline shaft tooth portion.

[0011] The technical effects and advantages of the present utility model:

[0012] 1. By squeezing the pressing plate with the set screw, the present utility model applies pressure above the internal spline tooth portion by using the pressing plate, thereby enabling the internal spline shaft hub at the installation hole to be in tight fit with the spline shaft tooth portion, avoiding the movement of the internal spline shaft hub when rotating, enabling uniform pressure transmission of the internal spline shaft hub, and at the same time being able to avoid the movement and wear of the internal spline shaft hub, thereby being able to improve the service life of the internal spline shaft hub and reduce the use cost;

[0013] 2. By turning the fastening bolt on the circular baffle to fix it with the second threaded hole, the inner spline shaft hub and the spline shaft tooth part can be strengthened, thereby improving the firmness between the spline shaft tooth part and the inner spline shaft hub, preventing premature wear of the inner spline shaft hub caused by axial movement of the inner spline shaft hub, and also improving the service life of the inner spline shaft hub and reducing the use cost.

[0014] 3. Through the engagement of multiple teeth on the inner wall of the inner spline tooth part with multiple teeth on the outer wall of the spline shaft tooth part, the tight fit between the spline shaft tooth part and the inner spline tooth part can be further improved, and then the connection firmness between the inner spline shaft hub and the spline shaft tooth part can be improved. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the spline shaft tooth part and the inner spline shaft hub of the present utility model;

[0017] Figure 3 is the front view of the overall structure of the present utility model;

[0018] Figure 4 is the side sectional view of the inner spline shaft hub and the spline shaft tooth part of the present utility model;

[0019] Figure 5 is the rear view of the overall structure of the present utility model.

[0020] The reference numerals are: 1. Inner spline shaft hub; 2. Inner spline tooth part; 3. Mounting hole; 4. Pressure plate; 5. First threaded hole; 6. Set screw; 7. Circular baffle; 8. Fastening bolt; 9. Spline shaft tooth part; 10. Snap ring; 11. Second threaded hole. Detailed Description of the Preferred Embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Refer to the accompanying drawings of the specification Figures 1-5, the present utility model provides a coupling spline locking device, including an internal spline shaft hub 1. A spline tooth portion 2 is fixedly embedded at the front end of the internal spline shaft hub 1. An installation hole 3 is provided at the front end of the internal spline shaft hub 1, and the installation hole 3 is located above the spline tooth portion 2. A pressing plate 4 is arranged inside the installation hole 3. Two front-and-back distributed first threaded holes 5 are provided on the outer wall of the top of the internal spline shaft hub 1. Tightening screws 6 are threadedly connected to both of the first threaded holes 5. The bottom of the tightening screw 6 contacts the top of the pressing plate 4. When the tightening screw 6 is tightened, the tightening screw 6 pushes the pressing plate 4 downward, providing a downward pressure, thereby improving the tightness when the internal spline shaft hub 1 is connected to the spline shaft;

[0023] Next, a spline shaft tooth portion 9 is arranged inside the spline tooth portion 2. The spline shaft tooth portion 9 is inserted into the spline shaft tooth portion 9 for connecting the internal spline shaft hub 1 and the spline shaft tooth portion 9 for use together. The cross-section of the installation hole 3 is arranged in a dumbbell shape for placing the pressing plate 4. At the same time, using two tightening screws 6 facilitates pushing the pressing plate 4 to apply a downward force, making the internal spline shaft hub 1 closely fit with the spline shaft tooth portion 9;

[0024] Moreover, a circular baffle 7 is fixedly arranged at the rear end of the internal spline shaft hub 1. A fastening bolt 8 penetrates through the circular baffle 7, and the fastening bolt 8 is threadedly connected to the circular baffle 7. The fastening bolt 8 is provided for connecting the internal spline shaft hub 1 and the spline shaft, thereby improving the connection firmness of the internal spline shaft hub 1. An elastic retaining ring 10 is arranged at the front end of the circular baffle 7. The elastic retaining ring 10 is arranged at the rear end of the spline shaft tooth portion 9. The elastic retaining ring 10 can play a buffering role between the spline shaft tooth portion 9 and the circular baffle 7;

[0025] Furthermore, a second threaded hole 11 is provided at the rear end of the spline shaft tooth portion 9. The front end of the fastening bolt 8 extends into the second threaded hole 11 and is threadedly connected to the second threaded hole 11. The spline shaft tooth portion 9 is fixed by the fastening bolt 8, thereby avoiding wear caused by the axial movement of the internal spline shaft hub 1.

[0026] In use, first align one end of the spline shaft tooth part 9 with the internal spline tooth part 2 and insert it. Then turn the set screw 6 to press the pressure plate 4 downward, and use the downward force applied by the pressure plate 4 to make the internal spline shaft hub 1 at the installation hole 3 fit tightly with the spline shaft tooth part 9, avoiding the movement of the internal spline shaft hub 1 when rotating. This can make the pressure transmission of the internal spline shaft hub 1 uniform, avoid the movement and wear of the internal spline shaft hub 1, and further improve the service life of the internal spline shaft hub 1 and reduce the use cost. Then turn the fastening bolt 8 and insert it from the circular baffle 7 into the second threaded hole 11, and tighten the fastening bolt 8 with the second threaded hole 11. The fastening bolt 8 can be used to reinforce the internal spline shaft hub 1 and the spline shaft tooth part 9, so as to improve the firmness between the spline shaft tooth part 9 and the internal spline shaft hub 1, preventing the premature wear of the internal spline shaft hub 1 caused by the axial movement of the internal spline shaft hub 1. Similarly, it can also improve the service life of the internal spline shaft hub 1 and reduce the use cost.

[0027] Refer to the attached instruction manual Figures 1-5 , multiple teeth on the inner wall of the internal spline tooth part 2 are engaged with multiple teeth on the outer wall of the spline shaft tooth part 9, so as to further improve the tight fit between the spline shaft tooth part 9 and the internal spline tooth part 2, and then improve the connection firmness between the internal spline shaft hub 1 and the spline shaft tooth part 9.

[0028] Finally: The above is only the preferred embodiment of the present invention and is not used to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coupling spline locking device, characterized in that: It comprises an internal spline hub (1), the front end of which is fixedly embedded with an internal spline tooth portion (2), the front end of which is provided with a mounting hole (3), and the mounting hole (3) is arranged above the internal spline tooth portion (2); A pressure plate (4) is provided inside the mounting hole (3), and two threaded holes (5) are provided on the top outer wall of the inner spline hub (1) and are distributed front and back. The two threaded holes (5) are both threadedly connected with set screws (6) inside, and the bottom of the set screws (6) is in contact with the top of the pressure plate (4); A circular baffle (7) is fixedly provided at the rear end of the internal spline hub (1), a fastening bolt (8) penetrates the interior of the circular baffle (7), and the fastening bolt (8) is threadedly connected to the circular baffle (7).

2. A coupling spline locking device according to claim 1, characterized in that: A spline shaft tooth portion (9) is provided inside the internal spline tooth portion (2), and the spline shaft tooth portion (9) is plug-connected with the spline shaft tooth portion (9).

3. A coupling spline locking device according to claim 2, characterized in that: The front end of the circular baffle (7) is provided with an elastic retaining ring (10), and the elastic retaining ring (10) is arranged at the rear end of the spline shaft tooth portion (9).

4. A coupling spline locking device according to claim 2, characterized in that: A second threaded hole (11) is formed at the rear end of the spline shaft tooth portion (9), and a front end of the fastening bolt (8) extends into the second threaded hole (11) and is threadedly connected to the second threaded hole (11).

5. A coupling spline locking device according to claim 1, characterized in that: The cross section of the mounting hole (3) is configured to be dumbbell-shaped.

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