A high-speed straight line device

Abstract

The application relates to a high-speed straight-line device, wherein a telescopic pipe is arranged at one end of an outer pipe, a motor base is arranged at the other end of the outer pipe, a transmission motor with a main shaft is arranged on the motor base and faces the telescopic pipe, a speed reducer is arranged on the main shaft end of the transmission motor, the output end of the speed reducer penetrates through the motor base and is connected with a transmission screw rod, and a lower support is arranged on the side of the motor base close to the telescopic pipe, at least one horizontally arranged guide rod is arranged on the lower support, one end of the guide rod is connected with the lower support, and the other end of the guide rod is connected with an upper support arranged in the end of the outer pipe where the telescopic pipe is arranged. The application has the characteristics of long service life, high telescopic precision, more stable operation, and improved operation speed of the straight-line device.

Description

Technical Field

[0001] This invention relates to the field of telescopic straight-through device technology, and in particular to a high-speed straight-through device. Background Technology

[0002] Conventional straighteners, such as those described in patent number 2021206548744, typically control the start and stop of the straightener using two limit switches. These two limit switches are mounted at both ends of the outer tube, and the motor starts and stops by contacting the internally moving transmission block. However, this design has significant technical flaws. Since the motor and control panel are usually mounted on the motor base, the distances between the lower and upper limit switches and the control panel differ. The upper limit switch is typically far from the control panel and connected via a long cable. Cable length affects signal transmission speed, and even a slight difference can cause variations in motor start and stop. That is, when the transmission block contacts the upper limit switch, the motor continues to rotate before the signal reaches the control panel. Therefore, the transmission block may exceed its limits, and repeated occurrences accelerate wear on the transmission block and also affect the upper limit switch. Consequently, straighteners produced using this method cannot operate in high-precision and high-strength equipment.

[0003] To address the aforementioned issues, typically two limit switches are mounted on a single base. A pull rod structure is installed within the tube and connects to one of the limit switches. When the transmission block pushes the pull rod structure, the pull rod pushes the limit switch, causing the limit structure to close, thus enabling the motor to start and stop. However, while this method solves the signal transmission speed problem, it significantly increases the cost and lifespan of the actuator. To ensure stable operation of the pull rod, a separate groove for its movement is required within the tube, further increasing the tube's cost. Furthermore, since the rebound force relies on the limit switch's own elasticity, in high-intensity and repetitive operating environments, the limit switch itself experiences significant wear, greatly impacting its lifespan. Additionally, the linkage between the transmission block and the contact switch via the pull rod affects the transmission accuracy. When the pull rod deforms under external force, its linkage effect decreases. Therefore, the aforementioned product cannot operate under high-intensity working conditions.

[0004] To solve the above problems, the structure needs to be improved to achieve the requirements of high precision and high strength. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a high-speed straight-through device with the characteristics of long service life, high telescopic accuracy, more stable operation, and improved straight-through device operating speed.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: A high-speed straight-line device is provided, comprising an outer tube and a telescopic tube. The telescopic tube is installed inside one end of the outer tube, and a motor base is installed inside the other end of the outer tube. A drive motor with its main shaft facing the telescopic tube is installed on the motor base. A reducer is installed on the main shaft end of the drive motor. The output end of the reducer passes through the motor base and is connected to a transmission lead screw. The outer tube also contains:

[0007] The lower bracket located on the side of the motor base near the telescopic tube has at least one horizontally arranged guide rod installed on it. One end of the guide rod is connected to the lower bracket, and the other end is connected to the upper bracket located inside the end of the outer tube where the telescopic tube is installed.

[0008] A switch fixing component is located on the side of the lower bracket near the telescopic tube. A circuit board is mounted on the switch fixing component, and two staggered sensor switches are provided on the circuit board.

[0009] A transmission nut is located on the side of the switch fixing component near the telescopic tube. The transmission nut and the transmission screw are connected by a thread, and the transmission nut is connected to one end of the telescopic tube.

[0010] The transverse length of the threaded surface of the transmission lead screw is greater than the length of the guide rod;

[0011] The transmission nut is equipped with an upper insert for inserting a switch fixing component, and the lower bracket is equipped with a lower insert for inserting a switch fixing component. The upper insert can contact one of the sensor switches, and the lower insert can contact the other sensor switch.

[0012] In this technical solution, a switch fixing component is used to conveniently fix the circuit board and two sensor switches, ensuring that the distance between the sensor switches and the circuit board is the same, and the distance between the two circuit boards and the drive motor is also the same. This avoids the difference caused by different cable lengths during the sensing and control process, ensures the response speed of the drive motor, and improves the operating accuracy of the entire device. At the same time, by setting a lower bracket and a drive nut, two-stage triggering is achieved, and the two sensor switches are contacted through the upper and lower plugs, improving the operational stability of all three components.

[0013] In this technical solution, the transmission nut is operated by a transmission screw. When the transmission nut moves to the position of contact with the upper bracket, the transmission screw can still rotate and control the transmission nut to move upward. At this time, under the action of the guide rod, the lower bracket is driven to move upward, so that the lower plug-in enters the switch fixing part and contacts the sensor switch, thereby causing the transmission motor to stop quickly.

[0014] As a supplement to this technical solution, the sensor switch is arranged in the same straight line as the upper or lower plug-in, and the upper or lower plug-in is vertically triggered, that is, the root of the inclined trigger spring on the sensor switch is close to the upper or lower plug-in, and the upper or lower plug-in contacts the root of the trigger spring first when they come into contact.

[0015] This technical solution employs a vertical triggering method, ensuring that the sensor switch itself is not subjected to direct impact from the upper or lower plug-in. The main force on the sensor switch is concentrated on the inclined trigger spring, which greatly improves the service life of the sensor switch and enables the device to operate stably in high-intensity equipment.

[0016] As a supplement to this technical solution, the lower bracket and the switch fixing component are connected by a buffer elastic element. By setting the buffer elastic element, the impact force of the lower bracket and the transmission nut on the switch fixing component is mitigated, thereby improving the service life of the switch fixing component. At the same time, the buffer elastic element increases the operating margin of the transmission motor. When the sensor switch controls the transmission motor to stop rotating, the transmission motor will definitely have a slight delay. At this time, the transmission motor will control the transmission nut to make a slight movement. If the lower bracket and the switch fixing component are rigidly connected, it will cause pressure damage to the switch fixing component, the lower bracket and the transmission nut. The buffer elastic element buffers the slight movement distance, ensuring the service life of the switch fixing component, the lower bracket and the transmission nut.

[0017] As a supplement to this technical solution, the buffer elastic element adopts a spring structure. Several spring mounting rods parallel to the guide rod are installed on the lower bracket. The buffer elastic element is installed between the guide rod and the spring mounting rods to support the switch fixing component. The spring structure makes the buffer elastic element easy to install and arrange, reducing the assembly difficulty of the device.

[0018] As a supplement to this technical solution, cable channels are provided on the switch fixing component, motor base, drive motor and lower bracket. By providing cable channels, it is convenient to concentrate the cable and lead it out from one end of the straight device to connect to the external power supply.

[0019] As a supplement to this technical solution, a guide rail parallel to the guide rod is provided on the inner wall of the outer tube, and the transmission nut, switch fixing component and lower bracket are all provided with sliding grooves that match the guide rail. By setting the guide rail, the operational stability of the transmission nut, switch fixing component and lower bracket is improved.

[0020] As a supplement to this technical solution, the end of the transmission screw is located inside the telescopic tube, and a stop block is installed on the end of the transmission screw. The outer side of the stop block forms a locking constraint with the inner wall of the telescopic tube. By setting the stop block, it is ensured that the telescopic tube will not rotate during the rotation of the transmission screw.

[0021] As a supplement to this technical solution, the telescopic pipe adopts a pipe structure with an elliptical or polygonal cross-section.

[0022] As a supplement to this technical solution, a bushing that mates with the output end of the reducer is installed inside the motor base. A stabilizing convex ring is provided in the middle of the bushing, and plane bearings are installed on both sides of the stabilizing convex ring. The operation stability of the reducer's output end is improved by installing the bushing and the plane bearings.

[0023] As a supplement to this technical solution, an upper cover is installed on one end of the telescopic tube of the outer tube, and an upper cover pressure plate is installed on the upper cover and sleeved on the telescopic tube. An upper cover sealing ring is provided between the upper cover and the upper cover pressure plate. The dustproof and waterproof capabilities are improved by adding the upper cover, the upper cover pressure plate and the upper cover sealing ring.

[0024] Beneficial Effects: This invention relates to a high-speed straight-line device. By installing switch fixing components, a circuit board and two sensor switches are easily fixed, ensuring that the distance between the sensor switches and the circuit board is the same, and the distance between the two circuit boards and the drive motor is also the same. This avoids discrepancies caused by varying cable lengths during the sensor control process, ensuring the response speed of the drive motor and improving the overall operational accuracy of the device. Furthermore, by setting a lower bracket and a drive nut, two-stage triggering is achieved. The upper and lower plugs contact the two sensor switches, improving the operational stability of all three components. The device features a long service life, high telescopic accuracy, more stable operation, and increased straight-line device operating speed. Attached Figure Description

[0025] Figure 1 This is the front view of the present invention;

[0026] Figure 2 This is an internal structural view of the present invention;

[0027] Figure 3 This is the present invention. Figure 2 Enlarged view of a portion of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the sensor switch's triggering structure before the improvement of this invention;

[0029] Figure 5 This is a schematic diagram of the triggered structure of the improved sensor switch of the present invention;

[0030] Figure 6 This is a structural view of the switch fixing component described in this invention.

[0031] Diagram: 1. Outer tube, 2. Telescopic tube, 3. Drive motor, 4. Reducer, 5. Motor base, 6. Lower bracket, 7. Switch fixing component, 8. Drive nut, 9. Drive screw, 10. Guide rod, 11. Upper bracket, 12. Stop block, 13. Spring mounting rod, 14. Buffer elastic component, 15. Circuit board, 16. Upper plug-in, 17. Lower plug-in, 18. Bushing, 19. Surface bearing, 20. Cable channel, 21. Circuit board mounting notch, 22. Sensor switch, 23. Upper cover sealing ring, 24. Upper cover pressure plate, 25. Upper cover, 26. Central through hole, 27. Sensor switch mounting slot. Detailed Implementation

[0032] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0033] Embodiments of the present invention relate to a high-speed straight-line device, such as... Figure 1 As shown in Figure 4, the device includes an outer tube 1 and a telescopic tube 2. The telescopic tube 2 is installed inside one end of the outer tube 1, and a motor base 5 is installed inside the other end of the outer tube 1. A drive motor 3 with its main shaft facing the telescopic tube 2 is installed on the motor base 5. A reducer 4 is installed on the main shaft end of the drive motor 3. The output end of the reducer 4 passes through the motor base 5 and is connected to a transmission screw 9. The outer tube 1 also contains:

[0034] The lower bracket 6 is located on the side of the motor base 5 near the telescopic tube 2. At least one horizontally arranged guide rod 10 is installed on the lower bracket 6. One end of the guide rod 10 is connected to the lower bracket 6, and the other end is connected to the upper bracket 11 located in the end of the outer tube 1 where the telescopic tube 2 is installed.

[0035] A switch fixing component 7 is located on the side of the lower bracket 6 near the telescopic tube 2. A circuit board 15 is installed on the switch fixing component 7. Two staggered sensor switches 22 are provided on the circuit board 15.

[0036] The transmission nut 8 is located on the side of the switch fixing part 7 near the telescopic tube 2. The transmission nut 8 and the transmission screw 9 form a threaded connection. The transmission nut 8 is connected to one end of the telescopic tube 2.

[0037] The transverse length of the threaded surface of the transmission lead screw 9 is greater than the length of the guide rod 10;

[0038] The transmission nut 8 is equipped with an upper plug 16 into which a switch fixing member 7 can be inserted, and the lower bracket 6 is provided with a lower plug 17 into which a switch fixing member 7 can be inserted. The upper plug 16 can contact one of the sensor switches 22, and the lower plug 17 can contact the other sensor switch 22.

[0039] In this technical solution, the switch fixing component 7 is used to conveniently fix the circuit board 15 and the two sensor switches 22, so that the distance between the sensor switches 22 and the circuit board 15 is the same, and the distance between the two circuit boards 15 and the drive motor is also the same. This avoids the difference caused by the different cable lengths in the sensing and control process, ensures the response speed of the drive motor 3, and improves the operating accuracy of the entire device. At the same time, by setting the lower bracket 6 and the transmission nut 8, two-stage triggering is realized. The upper plug 16 and the lower plug 17 are used to contact the two sensor switches 22, which improves the operating stability of the three.

[0040] In this technical solution, the transmission nut 8 is operated by the transmission screw 9. When the transmission nut 8 moves to the position of contact with the upper bracket 11, the transmission screw 9 can still rotate and control the transmission nut 8 to move upward. At this time, under the action of the guide rod 10, the lower bracket 6 is driven to move upward, so that the lower plug 17 enters the switch fixing part 7 and contacts the sensor switch 22, thereby causing the transmission motor 3 to stop quickly.

[0041] As a supplement to this technical solution, the sensor switch 22 is arranged in the same straight line as the upper plug-in 16 or the lower plug-in 17. The upper plug-in 16 or the lower plug-in 17 are vertically triggered, that is, the root of the inclined trigger spring on the sensor switch 22 is close to the upper plug-in 16 or the lower plug-in 17. When the upper plug-in 16 or the lower plug-in 17 makes contact, it first makes contact with the root of the trigger spring.

[0042] In this technical solution, by adopting a vertical triggering method, the sensor switch 22 itself is not subjected to direct impact force from the upper plug-in 16 or the lower plug-in 17. The main force-bearing position of the sensor switch 22 is on the inclined trigger spring, which greatly improves the service life of the sensor switch 22 and enables the device to operate stably in equipment with high-intensity operation.

[0043] As a supplement to this technical solution, the lower bracket 6 and the switch fixing member 7 are connected by a buffer elastic member 14. By setting the buffer elastic member 14, the impact force of the lower bracket 6 and the transmission nut 8 on the switch fixing member 7 is mitigated, thereby improving the service life of the switch fixing member 7. At the same time, the buffer elastic member 14 increases the operating margin of the transmission motor 3. When the sensor switch 22 controls the transmission motor 3 to stop rotating, the transmission motor 3 will definitely have a slight delay. At this time, the transmission motor 3 will control the transmission nut 8 to make a slight movement. If the lower bracket 6 and the switch fixing member 7 are rigidly connected, it will cause pressure damage to the switch fixing member 7, the lower bracket 6 and the transmission nut 8. The buffer elastic member 14 buffers the slight movement distance, ensuring the service life of the switch fixing member 7, the lower bracket 6 and the transmission nut 8.

[0044] As a supplement to this technical solution, the buffer elastic element 14 adopts a spring structure. Several spring mounting rods 13 parallel to the guide rod 10 are installed on the lower bracket 6. The buffer elastic element 14 is installed between the guide rod 10 and the spring mounting rods 13 to support the switch fixing element 7. The spring structure makes the buffer elastic element 14 easy to install and arrange, reducing the assembly difficulty of the device.

[0045] As a supplement to this technical solution, cable channels 20 are provided on the switch fixing component 7, motor base 5, transmission motor 3 and lower bracket 6. By providing cable channels 20, it is convenient to concentrate the cable and lead it out from one end of the straight device to connect with the external power supply.

[0046] As a supplement to this technical solution, a guide rail parallel to the guide rod 10 is provided on the inner wall of the outer tube 1. The transmission nut 8, the switch fixing part 7 and the lower bracket 6 are all provided with grooves that match the guide rail. By setting the guide rail, the operational stability of the transmission nut 8, the switch fixing part 7 and the lower bracket 6 is improved.

[0047] As a supplement to this technical solution, the end of the transmission screw 9 is located inside the telescopic tube 2, and a stop block 12 is installed on the end of the transmission screw 9. The outer side of the stop block 12 forms a locking constraint with the inner wall of the telescopic tube 2. By setting the stop block 12, it is ensured that the telescopic tube 2 will not rotate during the rotation of the transmission screw 9.

[0048] As a supplement to this technical solution, the telescopic pipe 2 adopts a pipe structure with an elliptical or polygonal cross-section.

[0049] As a supplement to this technical solution, a bushing 18 is installed inside the motor base 5 to connect with the output end of the reducer 4. A stabilizing convex ring is provided in the middle of the bushing 18, and a plane bearing 19 is installed on both sides of the stabilizing convex ring. The operation stability of the output end of the reducer 4 is improved by installing the bushing 18 and the plane bearing 19.

[0050] As a supplement to this technical solution, an upper cover 25 is installed on one end of the outer tube 1 where the telescopic tube 2 is installed. An upper cover pressure plate 24 is installed on the upper cover 25 and sleeved on the telescopic tube 2. An upper cover sealing ring 23 is provided between the upper cover 25 and the upper cover pressure plate 24. The dustproof and waterproof capabilities are improved by adding the upper cover 25, the upper cover pressure plate 24 and the upper cover sealing ring 23.

[0051] The switch fixing member 7 is provided with a limiting protrusion on the inner wall of the outer tube 1 near the telescopic tube 2 to limit the movement distance of the switch fixing member 7. When the switch fixing member 7 moves towards the telescopic tube 2 and abuts against the limiting protrusion, the lower bracket 6 can start to approach the switch fixing member 7. The buffer elastic member 14 on the lower bracket 6 is compressed by force, and the upper plug 16 can be inserted into the switch fixing member 7.

[0052] Example 1

[0053] like Figure 1 and Figure 2 As shown, when this device is working, a start signal is first given to the drive motor 3. The main shaft of the drive motor 3 rotates, which drives the output end of the reducer 4 to rotate. The output end of the reducer 4 drives the drive screw 9 to rotate. Under the action of the thread of the drive screw 9, the drive nut 8 and the telescopic tube 2 move, causing the telescopic tube 2 to extend. When the drive nut 8 contacts the upper bracket 11, the drive nut 8 pushes the upper bracket 11. The upper bracket 11 pulls the lower bracket 6 towards the switch fixing part 7 through the guide rod 10. At this time, the buffer elastic element 14 on the lower bracket 6 contracts until the lower plug 17 on the lower bracket 6 is inserted into the switch fixing part 7 and contacts a sensor switch 22. Then the drive motor 3 stops moving, allowing the straight traveler to complete the extension action.

[0054] When the retraction action is performed, the drive motor 3 rotates in the opposite direction, and the drive nut 8 moves in the direction of the motor, causing the telescopic tube 2 to retract until the upper plug 16 on the drive nut 8 is inserted into the switch fixing part 7 and contacts another sensor switch 22. Then the drive motor 3 stops moving, and the retraction action is completed.

[0055] During the switching process of the drive motor 3, there is a very slight delay due to signal transmission issues. During this delay, the drive motor 3 remains running, creating a delay margin. The buffer elastic element 14 will act as a buffer to prevent the delay margin from acting directly between the drive nut 8 and the switch fixing part 7 or between the lower bracket 6 and the switch fixing part 7 during switching, thus protecting the structure of the three components and improving their service life.

[0056] Example 2

[0057] like Figure 4 and Figure 5 As shown, conventional proximity switches are horizontally installed. Under normal circumstances, the transmission block directly contacts the inclined trigger spring of the proximity switch. When in contact, the proximity switch itself is subjected to direct impact force. Repeated impacts will affect the service life of the proximity switch. However, in this technical solution, the sensor switch 22 is in a vertical state. When contact is initiated, the sensor switch 22 body and the impact part are misaligned. The impact part directly impacts the inclined spring of the sensor switch 22, thereby reducing the wear of the sensor switch 22 and greatly improving its service life.

[0058] Example 3

[0059] like Figure 6 As shown, a circuit board mounting notch 21 is provided on one side of the switch fixing component 7. Two sensor switch mounting slots 27 are symmetrically installed on the vertical side wall of the circuit board mounting notch 21. A central through hole 26 is provided in the middle of the switch fixing component 7. A circuit board 15 is installed on the circuit board mounting notch 21. Two sensor switches 22 extending into the sensor switch mounting slots 27 are installed on one side of the circuit board 15. The sensor switches 22 are arranged vertically and the two installation directions are exactly opposite, so that the two sensor switches 22 correspond to the upper plug-in 16 and the lower plug-in 17. The two ends of the sensor switch mounting slots 27 pass through the upper and lower end faces of the switch fixing component 7, so that the upper plug-in 16 and the lower plug-in 17 can enter the sensor switch mounting slots 27.

[0060] The above provides a detailed description of a high-speed straight-line device provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A high-speed straight-line device, comprising an outer tube (1) and a telescopic tube (2), wherein the telescopic tube (2) is installed inside one end of the outer tube (1), and a motor base (5) is installed inside the other end of the outer tube (1), a drive motor (3) with its main shaft facing the telescopic tube (2) is installed on the motor base (5), and a reducer (4) is installed on the main shaft end of the drive motor (3), the output end of the reducer (4) passing through the motor base (5) and connected to a transmission lead screw (9), characterized in that: The outer tube (1) is also equipped with: The lower bracket (6) is installed on the side of the motor base (5) near the telescopic tube (2). At least one horizontally arranged guide rod (10) is installed on the lower bracket (6). One end of the guide rod (10) is connected to the lower bracket (6), and the other end is connected to the upper bracket (11) located in the end of the outer tube (1) where the telescopic tube (2) is installed. A switch fixing component (7) is installed on the side of the lower bracket (6) near the telescopic tube (2). A circuit board (15) is installed on the switch fixing component (7). Two staggered sensor switches (22) are provided on the circuit board (15). A transmission nut (8) is installed on the side of the switch fixing part (7) near the telescopic tube (2). The transmission nut (8) and the transmission screw (9) form a threaded connection. The transmission nut (8) is connected to one end of the telescopic tube (2). The transverse length of the threaded surface of the transmission screw (9) is greater than the length of the guide rod (10); The transmission nut (8) is equipped with an upper plug (16) into which a switch fixing member (7) can be inserted, and the lower bracket (6) is provided with a lower plug (17) into which a switch fixing member (7) can be inserted. The upper plug (16) can contact one of the sensor switches (22), and the lower plug (17) can contact the other sensor switch (22).

2. A high-speed straight-line device according to claim 1, characterized in that: The sensor switch (22) is arranged in the same straight line as the upper plug-in (16) or the lower plug-in (17). The upper plug-in (16) or the lower plug-in (17) are vertically triggered, that is, the root of the inclined trigger spring on the sensor switch (22) is close to the upper plug-in (16) or the lower plug-in (17). When the upper plug-in (16) or the lower plug-in (17) makes contact, it first makes contact with the root of the trigger spring.

3. A high-speed straight-line device according to claim 1, characterized in that: The lower bracket (6) and the switch fixing member (7) are connected by a buffer elastic member (14).

4. A high-speed straight-line device according to claim 3, characterized in that: The buffer elastic element (14) adopts a spring structure. Several spring mounting rods (13) parallel to the guide rod (10) are installed on the lower bracket (6). The buffer elastic element (14) is installed between the guide rod (10) and the spring mounting rods (13) to support the switch fixing element (7).

5. A high-speed straight-line device according to claim 1, characterized in that: Cable channels (20) are provided on the switch fixing component (7), motor base (5), drive motor (3) and lower bracket (6).

6. A high-speed straight-line device according to claim 1, characterized in that: The inner wall of the outer tube (1) is provided with a guide rail parallel to the guide rod (10), and the transmission nut (8), the switch fixing part (7) and the lower bracket (6) are all provided with a groove matching the guide rail.

7. A high-speed straight-line device according to claim 1, characterized in that: The end of the transmission screw (9) is located inside the telescopic tube (2), and a stop block (12) is installed on the end of the transmission screw (9). The outer side of the stop block (12) forms a snap-fit ​​constraint with the inner wall of the telescopic tube (2).

8. A high-speed straight-line device according to claim 7, characterized in that: The telescopic pipe (2) has an internal pipe structure with an elliptical or polygonal cross-section.

9. A high-speed straight-line device according to claim 1, characterized in that: The motor base (5) is equipped with a bushing (18) that is connected to the output end of the reducer (4). A stabilizing convex ring is provided in the middle of the bushing (18), and a plane bearing (19) is installed on both sides of the stabilizing convex ring.

10. A high-speed straight-line device according to claim 1, characterized in that: The outer tube (1) is fitted with a top cover (25) at one end of the telescopic tube (2). The top cover (25) is fitted with a top cover pressure plate (24) that is sleeved on the telescopic tube (2). A top cover sealing ring (23) is provided between the top cover (25) and the top cover pressure plate (24).

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