Telescopic shock absorber

Abstract

The application relates to a telescopic shock absorber which comprises a bottom cylinder, an upper cylinder telescopically arranged in the bottom cylinder, an upper flange plate and a lower flange plate, the upper flange plate is connected with the peripheral wall of the upper cylinder, a limiting piece is arranged between the upper flange plate and the lower flange plate, the limiting piece is used for limiting the sliding direction between the upper cylinder and the bottom cylinder, an elastic piece is further arranged between the upper flange plate and the lower flange plate, a buffer structure is further arranged between the upper flange plate and the lower flange plate, and the upper cylinder is sleeved outside the bottom cylinder. The application realizes the shock absorption effect in the process of pipeline concrete conveying through the buffer and shock absorption of the shock absorbing spring, and reduces the loss degree of the pipeline connection under the rigid load.

Description

Technical Field

[0001] This application relates to the technical field of mechanical vibration damping, and in particular to a telescopic vibration damper. Background Technology

[0002] Currently, hydraulic robotic arms are robotic arms driven by hydraulic principles, enabling high-precision, high-speed, and highly flexible movements. Their working principle utilizes the pressure of a hydraulic engine to move each joint of the robotic arm through the action of hydraulic cylinders, hydraulic pipes, and hydraulic valves, thereby achieving the purpose of moving the robotic arm. Hydraulic robotic arms mainly consist of multiple joints. During the movement of the end effector, all joints need to participate. However, due to factors such as its own weight and material strength, the position of the end effector is difficult to precisely reach the target location. Especially for large hydraulic robotic arms, with even more joints and larger dimensions, the negative impacts of various factors are amplified, particularly the different deformations occurring at different joints, making it even more difficult to control the end effector position.

[0003] The robotic arm currently consists of a boom section, a support section, and outriggers. The outriggers are used to support the support section. In the actual concrete pouring process, the connection between pipes is a rigid connection. Due to the large weight of the concrete during transportation, if there is no buffer between the pipes, the pipe connection will wear out significantly, affecting the stability of the pipe connection. Utility Model Content

[0004] To address the issue of easy damage under heavy loads at pipe connection points, this application provides a telescopic shock absorber.

[0005] The telescopic shock absorber provided in this application adopts the following technical solution:

[0006] A telescopic shock absorber includes a base cylinder, an upper cylinder telescopically disposed within the base cylinder, an upper flange, and a lower flange. The upper flange is connected to the peripheral wall of the upper cylinder. A limiting member is provided between the upper flange and the lower flange to limit the sliding direction between the upper cylinder and the base cylinder. An elastic member is also provided between the upper flange and the lower flange. A buffer structure is also provided between the upper flange and the lower flange. The upper cylinder is slidably sleeved outside the base cylinder.

[0007] Furthermore, the limiting component is configured as a limiting rod, with threaded rods connected to both ends of the limiting rod. Nuts are externally threaded onto the threaded rods, and the two nuts are located on the outer sides of the upper flange and the lower flange, respectively. Both the upper flange and the lower flange are provided with through holes, through which the limiting rod and the threaded rod pass.

[0008] Furthermore, the elastic element is configured as a shock-absorbing spring, and the threaded rod corresponding to the upper flange is also threadedly connected with a nut. The shock-absorbing spring is sleeved outside the limiting rod. The nut and the corresponding nut are respectively disposed on both sides of the upper flange. The top end of the shock-absorbing spring abuts against the nut, and the other end abuts against the upper side of the lower flange. In the initial state, the shock-absorbing spring is in a compressed state.

[0009] Furthermore, the buffer structure includes a base column, an upper column, a buffer plate, and a fixing assembly. The base column is connected to the lower flange via the fixing assembly, and the upper column is also connected to the upper flange via the fixing assembly. A buffer hole is provided at the top of the base column, and the upper column slides and adapts to the buffer hole. The buffer plate is fixedly connected to one end of the upper column that extends into the base column. The buffer plate is provided with multiple through holes, and the base column is filled with hydraulic oil.

[0010] Furthermore, multiple buffer springs are connected between the buffer plate and the bottom post of the bottom post.

[0011] Furthermore, the fixing assembly includes a fixing rod, a screw, a threaded sleeve, and a snap-fit ​​part. The fixing rod is fixedly connected to the bottom column or the upper column. The screw is connected to the upper flange or the lower flange respectively. The threaded sleeve is slidably sleeved on the outside of the fixing rod. The threaded sleeve is threadedly connected to the screw. The snap-fit ​​part is used to snap the fixing rod and the threaded sleeve together.

[0012] Furthermore, the snap-fit ​​part includes a snap-fit ​​ring and an abutment ring. The snap-fit ​​ring is fixedly connected to one end of the threaded sleeve, and the snap-fit ​​ring slides to fit outside the fixed rod. The abutment ring is fixedly connected to one end of the fixed rod near the screw. When the snap-fit ​​ring and the abutment ring abut against each other, the threaded sleeve is threadedly connected to the screw.

[0013] In summary, the beneficial technical effects of this application are as follows:

[0014] 1. When the upper cylinder slides downwards, the upper flange moves downwards due to the connection between the nut and the bolt. At this time, the damping spring begins to be compressed and deformed. Under the elastic force of the damping spring returning to its original shape, the damping spring begins to push the upper cylinder upwards, which achieves the buffering and shock absorption effect between the upper cylinder and the bottom cylinder.

[0015] 2. The buffer plate also moves inside the bottom column. At this time, the hydraulic oil flows upward after passing through the perforation. During this flow, the hydraulic oil has a resistance effect on the downward movement of the buffer plate, which can greatly reduce the descent speed of the upper column and thus protect the shock-absorbing spring.

[0016] 3. As the threaded sleeve continues to connect with the screw, the retaining ring slides along the length of the fixed rod until it moves to the position where it abuts against the abutting ring. Under the threaded connection between the threaded sleeve and the screw, and the mutual pulling action between the abutting ring and the retaining ring, the connection between the fixed rod and the screw is achieved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0018] Figure 2 This is a cross-sectional view of the buffer structure according to an embodiment of this application;

[0019] Figure 3 yes Figure 2 A magnified view of part A in the diagram.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Bottom cylinder; 10. Shock-absorbing spring; 11. Bottom column; 12. Upper column; 13. Buffer plate; 14. Buffer hole; 15. Through hole; 16. Buffer spring; 17. Fixing rod; 18. Screw; 19. Threaded sleeve; 20. Snap ring; 21. Abutment ring; 2. Upper cylinder; 3. Upper flange; 4. Lower flange; 5. Limiting rod; 6. Threaded rod; 7. Nut; 8. Nut; 9. Through hole. Detailed Implementation

[0022] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] This application discloses a telescopic shock absorber. (Refer to...) Figures 1-3 It includes a bottom cylinder 1, an upper cylinder 2 telescopically disposed within the bottom cylinder 1, an upper flange 3, and a lower flange 4. Both the bottom cylinder 1 and the upper cylinder 2 may be threaded to facilitate connection of the bottom cylinder 1 and the upper cylinder 2 to corresponding structures. In this embodiment, two pipe sections are connected between the bottom cylinder 1 and the upper cylinder 2, which can be connected by flanges or threads. Both the bottom cylinder 1 and the upper cylinder 2 are hollow and used for concrete transportation. Due to the weight of the pipes themselves and the weight of the concrete during the concrete transportation process, the load at the connection point of the two pipes is large. If buffering and shock absorption are not performed, the pipe connection point will suffer significant wear and tear, affecting the stability of the connection.

[0024] The upper flange 3 is fixedly connected to the circumferential wall of the upper cylinder 2, and the lower flange 4 is fixedly connected to the circumferential wall of the bottom cylinder 1. In this embodiment, welding is preferred. A limiting element is provided between the upper flange 3 and the lower flange 4. The limiting element is used to restrict the sliding between the upper cylinder 2 and the bottom cylinder 1, that is, to ensure that the upper cylinder 2 slides outside the bottom cylinder 1, it can also limit the sliding distance between the upper cylinder 2 and the bottom cylinder 1, thereby achieving the effect of limiting the bottom cylinder 1 and the upper cylinder 2. Therefore, in this embodiment, it is preferred to use a limiting element for restriction. The limiting element is set as a limiting rod 5. Both ends of the limiting rod 5 are connected to threaded rods 6. Nuts 8 are externally threaded to the threaded rods 6. The two nuts are located on the outside of the upper flange 3 and the lower flange 4, respectively. Both the upper flange 3 and the lower flange 4 are provided with through holes 9. The limiting rod 5 and the threaded rod 6 pass through the through holes 9, that is, the threaded rod 6 and the threaded rod 6 slide in the through holes 9.

[0025] An elastic element is also provided between the upper flange 3 and the lower flange 4; the elastic element is a shock-absorbing spring 10, and the threaded rod 6 corresponding to the upper flange 3 is also threadedly connected to a nut 7. The shock-absorbing spring 10 is sleeved on the limit rod 5, and the nut 7 and the corresponding nut 8 are respectively provided on both sides of the upper flange 3. The top end of the shock-absorbing spring 10 abuts against the nut 7, and the other end abuts against the upper side of the lower flange 4. In the initial state, the shock-absorbing spring 10 is in a compressed state. Under the action of the nut 7 and the nut 8, the flange can move together with the corresponding threaded rod 6. When the upper cylinder 2 slides downwards, the upper flange 3 moves downwards due to the mutual connection between the nut 8 and the bolt 7. At this time, the damping spring 10 begins to be compressed and deformed. Under the elastic force of the damping spring 10 returning to its original shape, the damping spring 10 begins to push the upper cylinder 2 upwards, which achieves the buffering and shock absorption effect between the upper cylinder 2 and the bottom cylinder 1. However, in order to ensure that there is an elastic restoring force between the upper cylinder 2 and the bottom cylinder 1 throughout the entire process, the damping spring 10 needs to be compressed and deformed in the initial state. Therefore, the upper cylinder 2 is always subjected to the elastic force of the damping spring 10.

[0026] A buffer structure is also provided between the upper flange 3 and the lower flange 4. In actual operation, if the upper cylinder 2 is subjected to excessive force, the instantaneous impact force on the shock absorber spring 10 will be too large, and the shock absorber spring 10 will be compressed too quickly, which will easily cause damage to the shock absorber spring 10 and affect its service life. The buffer structure itself has the function of relieving excessive force and can protect the shock absorber spring 10. The working principle of the buffer structure itself is to use the resistance of hydraulic oil in the flow process to greatly buffer the force on the upper cylinder 2.

[0027] The buffer structure includes a base column 11, an upper column 12, a buffer plate 13, and a fixing assembly. The base column 11 is connected to the lower flange 4 via the fixing assembly, and the upper column 12 is also connected to the upper flange 3 via the fixing assembly. A buffer hole 14 is provided at the top of the base column 11, and the upper column 12 slides and adapts to the buffer hole 14. The buffer plate 13 is fixedly connected to one end of the upper column 12 that extends into the base column 11. The buffer plate 13 has multiple through holes 15. The base column 11 is filled with hydraulic oil. The base column 11 is connected to the lower flange 4, and the upper column 12 is connected to the bottom of the upper flange 3. 2. The sliding adapter is fitted into the bottom column 11. The chassis is provided with multiple through holes 15. In this embodiment, two through holes 15 are preferred, and the two through holes 15 are symmetrically arranged with respect to the central axis of the upper column 12. As the upper column 12 moves rapidly downward with the upper flange 3, the buffer plate 13 also moves in the bottom column 11. At this time, the hydraulic oil flows upward after passing through the through holes 15. During this flow, the hydraulic oil has a resistance effect on the downward movement of the buffer plate 13, which can greatly reduce the descent speed of the upper column 12, thereby protecting the shock absorber spring 10.

[0028] A buffer spring 16 is connected between the buffer plate 13 and the bottom column 11. In order to ensure the normal movement between the upper cylinder 2 and the bottom cylinder 1, a buffer spring 16 that can restore the buffer plate 13 to its initial position is also required between the buffer plate 13 and the bottom column 11. The function of the buffer spring 16 is to ensure the sliding synchronization between the bottom cylinder 1 and the upper cylinder 2 and between the bottom column 11 and the upper column 12 to the greatest extent, thereby ensuring the shock absorption effect of the shock absorption spring 10. In this embodiment, the elastic performance of the buffer spring 16 can be lower than that of the shock absorption spring 10.

[0029] The fixing assembly includes a fixing rod 17, a screw 18, a threaded sleeve 19, and a snap-fit ​​part. The fixing rod 17 is fixedly connected to the bottom column 11 or the upper column 12. The screw 18 is connected to the upper flange 3 or the lower flange 4 respectively. The threaded sleeve 19 is slidably sleeved on the outside of the fixing rod 17 and is threadedly connected to the screw 18. The snap-fit ​​part is used to snap the fixing rod 17 and the threaded sleeve 19. In this embodiment, the connection relationship between the upper flange 3 and the upper column 12 is described. First, the threaded rod 18 is fixed to the bottom of the upper flange 3. At the same time, the length of the screw 18 is smaller than the length of the fixing rod 17. Both ends of the threaded sleeve 19 are open, and the threaded sleeve 19 can be fully threadedly connected to the screw 18 to ensure the connection strength between the fixing rod 17 and the screw 18.

[0030] The locking part includes a locking ring 20 and an abutment ring 21. The locking ring 20 is fixedly connected to one end of the threaded sleeve 19, and the locking ring 20 slides to fit the outside of the fixing rod 17. The abutment ring 21 is fixedly connected to the end of the fixing rod 17 near the screw 18. When the locking ring 20 and the abutment ring 21 abut, the threaded sleeve 19 is threadedly connected to the screw 18. The outer diameter of the locking ring 20 is smaller than the outer diameter of the abutment ring 21 to ensure that the locking ring 20 and the abutment ring 21 abut. The inner diameter of the threaded sleeve 19 is larger than the outer diameter of the abutment ring 21 to ensure that the threaded sleeve 19 can pass through or be fitted onto the abutment ring 21. Outside ring 21, threaded sleeve 19 is adapted to screw 18 and threadedly connected. First, the end of fixed rod 17 abuts against screw 18. Then, threaded sleeve 19 is rotated and threadedly connected to screw 18. During the process of threaded sleeve 19 continuing to be threadedly connected to screw 18, locking ring 20 slides along the length of fixed rod 17 until locking ring 20 moves to the position of abutting ring 21. Under the threaded connection between threaded sleeve 19 and screw 18 and the mutual pulling action between locking ring 21 and locking ring 20, the connection effect between fixed rod 17 and screw 18 is achieved. At this time, buffer spring 16 is also in a compressed state.

[0031] The implementation principle of the telescopic shock absorber in this embodiment is as follows: First, the fixed rod 17 and the end of the screw 18 are abutted together. The threaded sleeve 19 is rotated and threadedly connected to the screw 18. During the process of the threaded sleeve 19 continuing to be threadedly connected to the screw 18, the retaining ring 20 slides along the length direction of the fixed rod 17 until the retaining ring 20 moves to the position of abutting the abutting ring 21. Under the threaded connection between the threaded sleeve 19 and the screw 18 and the mutual pulling action between the abutting ring 21 and the retaining ring 20, the connection effect between the fixed rod 17 and the screw 18 is achieved. When the upper cylinder 2 slides downward, under the mutual connection action of the nut 8 and the bolt 7, the upper flange... As the disc 3 moves downwards, the damping spring 10 begins to be compressed and deformed. Under the elastic force of the damping spring 10 returning to its original shape, the damping spring 10 begins to push the upper cylinder 2 upwards, thus achieving the effect of buffering and damping between the upper cylinder 2 and the bottom cylinder 1. At the same time, as the upper column 12 moves downwards rapidly following the upper flange 3, the buffer plate 13 also moves within the bottom column 11. At this time, the hydraulic oil flows upwards after passing through the perforation 15. During this flow, the hydraulic oil has a resistance effect on the downward movement of the buffer plate 13, thus greatly reducing the descent speed of the upper column 12, thereby protecting the damping spring 10.

[0032] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A telescopic shock absorber, characterized in that, The device includes a bottom cylinder (1), an upper cylinder (2) telescopically disposed within the bottom cylinder (1), an upper flange (3), and a lower flange (4). The upper flange (3) is connected to the peripheral wall of the upper cylinder (2). A limiting element is provided between the upper flange (3) and the lower flange (4) to limit the sliding direction between the upper cylinder (2) and the bottom cylinder (1). An elastic element is also provided between the upper flange (3) and the lower flange (4). A buffer structure is also provided between the upper flange (3) and the lower flange (4). The upper cylinder (2) is slidably sleeved outside the bottom cylinder (1).

2. The telescopic shock absorber according to claim 1, characterized in that, The limiting component is configured as a limiting rod (5), and both ends of the limiting rod (5) are connected to threaded rods (6). The threaded rods (6) are externally threaded with nuts (8). The two nuts (8) are located on the outside of the upper flange (3) and the lower flange (4), respectively. The upper flange (3) and the lower flange (4) are both provided with through holes (9), and the limiting rod (5) and the threaded rods (6) pass through the through holes (9).

3. A telescopic shock absorber according to claim 2, characterized in that, The elastic element is configured as a shock-absorbing spring (10). The threaded rod (6) corresponding to the upper flange (3) is also threaded with a nut (7). The shock-absorbing spring (10) is sleeved on the limiting rod (5). The nut (7) and the corresponding nut (8) are respectively set on both sides of the upper flange (3). The top end of the shock-absorbing spring (10) abuts against the nut (7), and the other end abuts against the upper side of the lower flange (4). In the initial state, the shock-absorbing spring (10) is in a compressed state.

4. A telescopic shock absorber according to claim 1, characterized in that, The buffer structure includes a bottom column (11), an upper column (12), a buffer plate (13), and a fixing component. The bottom column (11) is connected to the lower flange (4) through the fixing component, and the upper column (12) is also connected to the upper flange (3) through the fixing component. The bottom column (11) has a buffer hole (14) at the top, and the upper column (12) is slidably adapted to the buffer hole (14). The buffer plate (13) is fixedly connected to one end of the upper column (12) that extends into the bottom column (11). The buffer plate (13) has multiple through holes (15), and the bottom column (11) is filled with hydraulic oil.

5. A telescopic shock absorber according to claim 4, characterized in that, Multiple buffer springs (16) are connected between the buffer plate (13) and the bottom post (11).

6. A telescopic shock absorber according to claim 5, characterized in that, The fixing assembly includes a fixing rod (17), a screw (18), a threaded sleeve (19), and a snap-fit ​​part. The fixing rod (17) is fixedly connected to the bottom column (11) or the upper column (12). The screw (18) is connected to the upper flange (3) or the lower flange (4) respectively. The threaded sleeve (19) is slidably sleeved on the outside of the fixing rod (17). The threaded sleeve (19) is threadedly connected to the screw (18). The snap-fit ​​part is used to snap the fixing rod (17) and the threaded sleeve (19).

7. A telescopic shock absorber according to claim 6, characterized in that, The snap-fit ​​part includes a snap-fit ​​ring (20) and an abutment ring (21). The snap-fit ​​ring (20) is fixedly connected to one end of the threaded sleeve (19), and the snap-fit ​​ring (20) slides to fit outside the fixed rod (17). The abutment ring (21) is fixedly connected to one end of the fixed rod (17) near the screw (18). When the snap-fit ​​ring (20) and the abutment ring (21) abut against each other, the threaded sleeve (19) and the screw (18) are threadedly connected.

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