Telescopic transmission shaft

Abstract

The utility model discloses a telescopic transmission shaft, relates to transmission shaft field, its technical scheme key point is: including outer shaft and inner shaft, the outer shaft is hollow, the inner shaft is located in the outer shaft and can stretch in and out along the outer shaft to change the length of transmission shaft, the outer side wall of the outer shaft is threaded connection with screw rod, the screw rod is in threaded connection with the screw rod, and the screw rod is in threaded connection with the inner shaft. The screw drives the fixing part located in the outer shaft to move downwards to be inserted into the concave part of the part connected with the inner shaft, the outer shaft and the inner shaft are fixed, the length of the transmission shaft can be flexibly adjusted in the mode that the inner shaft stretches out and draws back relative to the outer shaft and then is fixed, and the practicability of the transmission shaft is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of transmission shaft, more specifically, it relates to a telescopic transmission shaft. BACKGROUND

[0002] In the mechanical field, the transmission shaft as the key component of power transmission, its performance directly affects the equipment operation. When the equipment such as automobile, industrial robot and special operation vehicle runs, the relative position between each component often changes significantly due to different working conditions. For example: the multi-joint movement of industrial robot and the adjustment of work space layout make the distance from base to end effector change, which causes the length of transmission shaft to change accordingly.

[0003] However, the length of conventional transmission shaft is fixed, which cannot adapt to these changes, and the practicability is poor. In order to maintain the normal operation of equipment under different working conditions and meet the actual demand of transmission shaft length in various application scenarios, it is necessary to frequently replace transmission shafts of different lengths according to specific working conditions to ensure smooth power transmission between equipment components and guarantee stable and efficient operation of equipment, which undoubtedly increases the working intensity of workers and transmission cost.

[0004] Therefore, in order to solve the above technical problems, the present application provides a telescopic transmission shaft. TECHNICAL SOLUTION

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a telescopic transmission shaft.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a telescopic transmission shaft, comprising an outer shaft and an inner shaft, the outer shaft is hollow, the inner shaft is located inside the outer shaft and can extend in and out along the outer shaft to change the length of the transmission shaft, a screw is threadedly connected to the outer side wall of the outer shaft, the downward movement of a fixed component located in the outer shaft is driven by the screw to insert into the recess of the inner shaft connecting component, and the outer shaft and the inner shaft are fixed.

[0007] Preferably, the inner part of the outer shaft is fixedly connected with guide rails A for sliding of sliding blocks A on both sides, the sliding blocks A are fixedly connected with a connecting block, and the surface of the connecting block is fixed with the end of the inner shaft.

[0008] Preferably, a circular groove is formed in the top of the connecting block, the fixed component comprises a horizontal plate rotatably connected with the bottom of the screw, multiple cylinders are horizontally arranged at the bottom end of the horizontal plate, guide rails B are fixedly connected to the inner side wall of the outer shaft on both sides near the top end, and the two sides of the horizontal plate are slidably connected in the guide rails B through sliding blocks B.

[0009] Preferably, a platform is provided on the outer side wall of the outer shaft at the opposite position to the screw, a rotating plate is fixedly connected to the top of the screw, and a sealing ring A is bonded to the bottom of the rotating plate to reduce the gap between the rotating plate and the platform.

[0010] Preferably, a sealing component is installed at the opening of the outer shaft to seal the opening.

[0011] Preferably, the sealing component includes a cover fixed to the opening of the outer shaft, the cover having a circular through groove for the inner shaft to pass through, and a sealing ring B being adhered to the inner wall of the circular through groove.

[0012] Preferably, the outer wall of the inner shaft is marked with the length of the drive shaft. By comparing the length scale with the cover, the length of the inner shaft extending out of the cover can be known, and thus the total length of the drive shaft can be obtained.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model allows for flexible adjustment of the transmission shaft length by extending and retracting the inner shaft relative to the outer shaft and then fixing it, greatly improving the practicality of the transmission shaft and solving the problem of the fixed length of traditional transmission shafts in the background art, which cannot adapt to these changes and has poor practicality.

[0015] 2. This utility model uses a rotating plate to rotate the screw. When the cylinder is inserted into the circular groove on the connecting block, the rotating plate is pressed tightly against the inner wall of the platform, and the sealing ring A is compressed, thereby reducing the gap between the rotating plate and the platform to prevent dust from entering the outer shaft. At the same time, the sealing ring A undergoes elastic deformation under compression. This elastic deformation causes the sealing ring A to generate an additional compressive force on the rotating plate and the platform, and also increases the friction between the rotating plate and the platform, thus preventing the rotating plate and the screw from rotating due to external forces.

[0016] 3. The opening of the outer shaft of this utility model is equipped with a sealing component to seal the opening and prevent dust from entering the interior of the outer shaft from here. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This utility model Figure 1 Enlarged view of the local structure of A;

[0020] Figure 3 This is a schematic diagram of the specific structure of the present invention after the sealing component is removed;

[0021] Figure 4 This utility model Figure 3 Enlarged view of the local structure of B;

[0022] Figure 5 This is a schematic diagram of the specific structure of this utility model after removing the sealing component and the outer shaft;

[0023] Figure 6 This is a schematic diagram of the connecting block connection structure in this utility model.

[0024] In the diagram: 1. Outer shaft; 2. Inner shaft; 3. Screw; 4. Length scale; 5. Fixing component; 501. Horizontal plate; 502. Cylinder; 503. Guide rail B; 504. Slider B; 6. Sealing component; 601. Cover; 602. Circular through groove; 603. Sealing ring B; 7. Guide rail A; 8. Slider A; 9. Connecting block; 10. Circular groove; 11. Platform; 12. Rotating plate; 13. Sealing ring A. Detailed Implementation

[0025] like Figures 1-6 As shown, this utility model provides a telescopic transmission shaft, including an outer shaft 1 and an inner shaft 2. The outer shaft 1 is hollow, and the inner shaft 2 is located inside the outer shaft 1 and can extend and retract along the outer shaft 1 to change the length of the transmission shaft. A screw 3 is threaded onto the outer wall of the outer shaft 1. The screw 3 drives the downward movement of the fixing component 5 located inside the outer shaft 1 to insert into the recess of the component connecting to the inner shaft 2, thereby fixing the outer shaft 1 and the inner shaft 2. Sliding sliders A8 are fixedly connected to both sides of the inner side of the outer shaft 1. A connecting block 9 is fixedly connected between the guide rail A7 and the slider A8, and the surface of the connecting block 9 is fixed to the end of the inner shaft 2. A circular groove 10 is provided on the top of the connecting block 9. The fixing component 5 includes a horizontal plate 501 that is rotatably connected to the bottom of the screw 3, and multiple cylinders 502 are arranged in a horizontal array at the bottom of the horizontal plate 501. Guide rails B503 are fixedly connected to both sides of the inner side wall of the outer shaft 1 near the top. The two sides of the horizontal plate 501 are slidably connected to the guide rails B503 through the sliders B504.

[0026] In use, the inner shaft 2 is pulled back and forth, the inner shaft 2 slides back and forth along the inside of the outer shaft 1, the inner shaft 2 drives the movement of the connecting block 9, the connecting block 9 drives the movement of the sliding block A8, the sliding block A8 slides along the guide rail A7 to maintain the linear movement of the inner shaft 2 relative to the outer shaft 1, thereby changing the length of the transmission shaft (the length of the transmission shaft = the length of the outer shaft 1 + the length of the inner shaft 2 extending out of the outer shaft 1), when the length of the transmission shaft is adjusted, the screw 3 is turned clockwise, the screw 3 moves downward along the outer shaft 1, the screw 3 drives the downward movement of the horizontal plate 501, the horizontal plate 501 drives the downward movement of the sliding block B504, the sliding block B504 slides along the guide rail B503 to maintain the linear movement of the horizontal plate 501, the horizontal plate 501 drives the downward movement of the cylinder 502, so that one of the cylinders 502 is inserted into the circular groove 10 on the connecting block 9, thereby fixing the length of the inner shaft 2 relative to the outer shaft 1, so that the length of the transmission shaft can be flexibly adjusted by the extension and retraction of the inner shaft 2 relative to the outer shaft 1, greatly improving the practicality of the transmission shaft, and vice versa. Clockwise rotation of the screw 3 drives the upward movement of the horizontal plate 501 and the cylinder 502, thereby pulling the cylinder 502 out of the circular groove 10 on the connecting block 9, and then the extension and retraction of the inner shaft 2 relative to the outer shaft 1 can be performed, thereby adjusting the length of the transmission shaft.

[0027] Further, a platform 11 is arranged on the opposite part of the outer shaft 1 outer wall and the screw 3, the top end of the screw 3 is fixedly connected with a rotating plate 12, the bottom of the rotating plate 12 is bonded with a sealing ring A13, that is, the rotating plate 12 is used to rotate the screw 3, when the cylinder 502 is inserted into the circular groove 10 on the connecting block 9, the rotating plate 12 is tightly attached to the inner wall of the platform 11, and the sealing ring A13 is extruded, thereby reducing the gap between the rotating plate 12 and the platform 11, to avoid dust entering the inside of the outer shaft 1 (dust is not easy to clean inside, and long time can cause corrosion), and the sealing ring A13 is extruded and elastically deformed. This elastic deformation will make the sealing ring A extrude the rotating plate 12 and the platform 11, and also improve the friction between the rotating plate 12 and the platform 11, to avoid the rotating plate 12 and the screw 3 from being affected by external force and rotating.

[0028] Moreover, the opening part of the outer shaft 1 is provided with a sealing member 6 to seal the opening part and prevent dust from entering the inside of the outer shaft 1, the specific structure of the sealing member 6 is as follows: the sealing member 6 comprises a cover body 601 fixed on the opening part of the outer shaft 1, a circular through slot 602 is formed in the cover body 601 for the inner shaft 2 to pass through, and a sealing ring B603 is bonded to the inner side wall of the circular through slot 602.

[0029] That is, the opening of the outer shaft 1 is reduced by the cover 601, and the sealing ring B603 of the contact part of the inner shaft 2 is extruded when contacting the inner shaft 2, thereby reducing the gap between the cover 601 and the inner shaft 2, and further avoiding dust from entering the inner shaft 1.

[0030] Furthermore, the outer side wall of the inner shaft 2 is marked with a length scale 4 of the transmission shaft, and the length of the inner shaft 2 extending out of the cover 601 is compared with the cover 601 through the length scale 4, so that the total length of the transmission shaft can be obtained.

[0031] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any person skilled in the art can easily implement the present application according to the drawings and the above description; however, any equivalent changes, modifications and evolutions made by those skilled in the art within the scope of the technical scheme of the present application, using the above disclosed technical content, are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolutions made according to the essential technology of the present application to the above embodiments are still within the protection scope of the technical scheme of the present application.

Claims

1. A telescoping propeller shaft, characterized by: Including outer shaft (1) and inner shaft (2), the outer shaft (1) is hollow, the inner shaft (2) is located in the outer shaft (1), and the length of the transmission shaft can be changed by extending into and out of the outer shaft (1), the outer wall of the outer shaft (1) is screw connected with screw rod (3), the fixed part (5) in the outer shaft (1) is driven to move downward by screw rod (3) and inserted into the recess of the connecting part of the inner shaft (2), so that the outer shaft (1) and the inner shaft (2) are fixed.

2. A telescoping propeller shaft as in claim 1 wherein: Both sides of the inner part of the outer shaft (1) are fixedly connected with guide rail A (7) for sliding block A (8), the sliding block A (8) is fixedly connected with connecting block (9), and the surface of the connecting block (9) is fixed with the end of the inner shaft (2).

3. A telescoping propeller shaft as defined in claim 2 wherein: The top of the connecting block (9) is provided with a circular groove (10), the fixed part (5) includes a horizontal plate (501) rotatably connected with the bottom of the screw rod (3), and the bottom end of the horizontal plate (501) is transversely arranged with a plurality of cylinders (502), the inner side wall of the outer shaft (1) is fixedly connected with guide rail B (503) on both sides of the top end part, and the both sides of the horizontal plate (501) are slidably connected in the guide rail B (503) through the sliding block B (504).

4. A telescoping propeller shaft as defined in claim 1, wherein: The opposite part of the outer side wall of the outer shaft (1) and the screw rod (3) is provided with a platform (11), the top end of the screw rod (3) is fixedly connected with a rotating plate (12), and the bottom of the rotating plate (12) is bonded with a sealing ring A (13).

5. A telescoping propeller shaft as defined in claim 1 wherein: The opening part of the outer shaft (1) is provided with a sealing part (6) to seal the opening part.

6. A telescoping propeller shaft as defined in claim 5 wherein: The sealing part (6) includes a cover (601) fixed on the opening part of the outer shaft (1), the cover (601) is provided with a circular through slot (602) for the inner shaft (2) to pass through, and the inner side wall of the circular through slot (602) is bonded with a sealing ring B (603).

7. A telescoping propeller shaft as defined in claim 1 wherein: The outer side wall of the inner shaft (2) is marked with a length scale (4) of the transmission shaft.

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