A one-way adjustable large torque rotary variable damper

Abstract

The present invention relates to the technical field of rotary dampers, in particular to a one-way adjustable large torque rotary variable damper, wherein a lead screw is passed through a shell, a one-way bearing assembly is sleeved on the lead screw located in a left chamber, a friction plate is fixedly mounted on the right side surface of a friction end cover, a wear plate is fixedly mounted on the left side surface of the one-way bearing assembly, a distance is provided between the friction plate and the wear plate, a secondary compression spring is sleeved on the lead screw between the friction end cover and the one-way bearing assembly, a nut matched with its thread is provided on the lead screw located in the right chamber, a main compression spring is sleeved on the lead screw between the one-way bearing assembly and the nut, a convex block matched with a long slide groove and moving in the long slide groove is provided on the nut, the rotary lead screw can rotate for multiple turns, and in the last few turns, a one-way variable damping is provided to cause the rotation speed of the rotary lead screw to gradually decrease, and the final rotation speed is reduced to 0, the speed reduction process of the rotary lead screw is smoother, can provide large torque output, the total number of rotation turns can be fine-tuned, and smaller space is occupied.

Description

Technical Field

[0001] The invention relates to the technical field of rotary dampers, in particular to a unidirectional adjustable large torque rotary variable damper. Background Art

[0002] At present, there are many types of rotary dampers on the market, including torsion spring rotary dampers, dampers designed using damping media or damping oil, and constant dampers designed using friction plates.

[0003] The existing rotary damper has the following defects:

[0004] a) Dampers using damping media or damping oil provide a small damping torque and are only suitable for rotational damping of small and medium-sized components, and most of them are single-turn dampers.

[0005] b) It is difficult for a rotary damper realized by a torsion spring to achieve large torque damping and multiple turns of damping in a limited space.

[0006] c) Dampers designed with friction plates are constant dampers or adjustable constant damping and cannot provide variable damping. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a unidirectional large torque damper, which increases with the increase of the number of rotations, and can eventually reduce the rotation speed of the rotating part to 0. The total number of rotations from a high speed to 0 can be fine-tuned to achieve a unidirectional adjustable large torque rotation variable damper.

[0008] The technical solution adopted by the present invention to solve its technical problems is: a one-way adjustable large torque rotary variable damper, including a shell and a screw, a friction end cover matched with the left side of the shell is provided, a bearing end cover matched with the right side of the shell is provided, a protrusion is provided on the inner wall of the shell to divide the inner cavity of the shell into a left inner cavity and a right inner cavity, long slide grooves are symmetrically opened on the inner wall of the right inner cavity of the shell, and short slide grooves are symmetrically opened on the inner wall of the protrusion facing the left inner cavity, a screw is passed through the shell, and a one-way bearing assembly is sleeved on the screw located in the left chamber, and there is relative movement between the one-way bearing assembly and the screw, but they cannot move relative to each other. Rotate, a friction plate is fixedly installed on the right side surface of the friction end cover, the friction plate is an annular structure and is coaxial with the lead screw, a wear plate is fixedly installed on the left side surface of the one-way bearing assembly, and there is a distance between the friction plate and the wear plate, a secondary compression spring is sleeved on the lead screw between the friction end cover and the one-way bearing assembly, a nut matched with its thread is provided on the lead screw located in the right chamber, a main compression spring is sleeved on the lead screw between the one-way bearing assembly and the nut, and a protrusion is provided on the nut that matches with the long slide groove and moves in the long slide groove, so that the nut can only move in the shell and cannot rotate. Therefore, the nut is driven to move by rotating the lead screw.

[0009] Furthermore, the one-way bearing assembly includes a sliding sleeve, a retaining ring and a one-way bearing sleeve. The sliding sleeve is connected to the screw bracket by a key, so that torque can be transmitted between the sliding sleeve and the screw, and at the same time, relative movement is achieved between the sliding sleeve and the screw. A one-way bearing is arranged between the sliding sleeve and the one-way bearing sleeve, and a retaining ring is arranged on the right end head sleeve of the sliding sleeve. The retaining ring is provided with a limiting protrusion that cooperates with the short sliding groove, so that the retaining ring can only move in the shell and cannot rotate, and there is relative rotational movement between the retaining ring and the sliding sleeve. A wear plate is fixedly installed on the left side surface of the one-way bearing sleeve, and the wear plate rotates synchronously clockwise through the one-way bearing sleeve, the one-way bearing and the screw. When the screw rotates counterclockwise, there is relative rotation between the wear plate and the screw, and the wear plate is an annular structure, which is coaxial with the one-way bearing sleeve.

[0010] Furthermore, convex keys are symmetrically arranged in the inner cavity of the sliding sleeve, and a first retaining ring groove, a key groove and a step boss are arranged on the outer surface of the sliding sleeve from left to right in sequence. An elastic retaining ring for the shaft is opened in the retaining ring groove, and the one-way bearing is fixedly installed on the sliding sleeve by means of keys and key grooves.

[0011] Furthermore, an integrated protrusion is provided on the inner cavity wall of the shell, and the protrusion is a step sleeve with an "L"-shaped transverse cross-section. The inner wall of the step sleeve is provided with symmetrically arranged long slide grooves, and the inner wall of the step sleeve facing the left inner cavity is provided with a short slide groove, and the long slide groove and the short slide groove are vertically arranged.

[0012] Furthermore, bearings are arranged between the friction end cover, the bearing end cover and the lead screw, and small bearing end covers are fixedly mounted on the sides of the friction end cover and the bearing end cover.

[0013] Furthermore, a second retaining ring groove is provided on the inner wall of the one-way bearing sleeve close to the retaining ring, and an elastic retaining ring for the hole is clamped in the second retaining ring groove.

[0014] Furthermore, a spacer sleeve is provided between the sliding sleeve and the retaining ring.

[0015] The beneficial effects of the present invention are as follows: in a limited space, the rotating screw can be rotated for multiple turns, and as the number of rotations increases, the damping continues to increase, and the damping force can be fine-tuned. During the last few rotations, a one-way variable damping is provided to cause the rotation speed of the rotating screw to gradually decrease, and the final rotation speed is reduced to 0. The speed reduction process of the rotating screw is smoother, and a large torque output can be provided. The total number of rotations can be fine-tuned, and less space is occupied. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 is a stereogram of the present invention;

[0018] Figure 2is a cross-sectional view of the present invention;

[0019] Figure 3 is an exploded view of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the housing of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the sliding sleeve of the present invention.

[0022] In the figure: 1. housing, 2. friction end cover, 3. screw nut pair, 4. one-way bearing assembly, 5. friction plate, 6. main compression spring, 7. auxiliary compression spring, 8. screw, 9. bearing, 10. nut, 11. retaining ring, 12. sliding sleeve, 13. one-way bearing, 14. one-way bearing sleeve, 15. wear plate, 16. bearing end cover, 17. small bearing end cover, 18. protrusion, 19. long slide groove, 20. short slide groove, 21. convex key, 22. keyway, 23. step boss, 24. first retaining ring groove, 25. elastic retaining ring for shaft, 26. second retaining ring groove, 27. elastic retaining ring for hole, 28. limiting protrusion, 29. protrusion, 30. spacer. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] like Figures 1 to 5 The one-way adjustable large torque rotary variable damper shown in the figure comprises a housing 1 and a lead screw 8. The left side of the housing 1 is provided with a friction end cover 2 matched therewith, and the right side of the housing 1 is provided with a bearing end cover 16 matched therewith. The inner wall of the housing 1 is provided with a protrusion 18 for dividing the inner cavity of the housing 1 into a left inner cavity and a right inner cavity. The right inner cavity wall of the housing 1 is symmetrically provided with a long slide groove 19, and the inner wall of the protrusion 18 facing the left inner cavity is symmetrically provided with a short slide groove 20.

[0025] A lead screw 8 is passed through the housing 1, and a one-way bearing assembly 4 is sleeved on the lead screw 8 located in the left chamber. The one-way bearing assembly 4 and the lead screw can move relative to each other but cannot rotate relative to each other. A friction plate 5 is fixedly mounted on the right side surface of the friction end cover 2. The friction plate is an annular structure and is coaxial with the lead screw 8. A wear plate 15 is fixedly mounted on the left side surface of the one-way bearing assembly 4. There is a gap between the friction plate 5 and the wear plate 15. A secondary compression spring 7 is sleeved on the lead screw 8 between the friction end cover 2 and the one-way bearing assembly 4.

[0026] A nut 10 that cooperates with its thread is provided on the lead screw 8 located in the right chamber, a main compression spring 6 is sleeved on the lead screw 8 between the one-way bearing assembly 4 and the nut 10, and a protrusion 29 that cooperates with the long slide groove 19 and moves in the long slide groove 19 is provided on the nut 10, so that the nut can only move in the shell and cannot rotate. Therefore, the nut 10 is driven to move by rotating the lead screw 8.

[0027] The lead screw 8 is divided into a long-step optical axis portion, an intermediate threaded portion and a short-step optical axis portion. The long-step optical axis portion of the lead screw 8 is located in the left inner cavity of the housing 1 , and the intermediate threaded portion of the lead screw 8 is located in the right inner cavity of the housing 1 .

[0028] The one-way bearing assembly 4 includes a sliding sleeve 12, a retaining ring 11 and a one-way bearing sleeve 14. The sliding sleeve 12 is connected to the support of the lead screw 8 by a key, so that the sliding sleeve 12 and the lead screw 8 can transmit torque. At the same time, the sliding sleeve 12 and the lead screw 8 can move relative to each other. A one-way bearing 13 is arranged between the sliding sleeve 12 and the one-way bearing sleeve 14. The retaining ring 11 is sleeved on the right end of the sliding sleeve 12. The retaining ring 11 is provided with a limiting protrusion 28 that matches the short slide groove 20. The retaining ring 11 can only move in the housing 1 but cannot rotate. There is relative rotational movement between the retaining ring 11 and the sliding sleeve 12. A wear plate 15 is fixedly installed on the left side of the one-way bearing sleeve 14. The wear plate 15 rotates synchronously clockwise with the one-way bearing sleeve 14 and the one-way bearing 13 and the screw 8. When the screw 8 rotates counterclockwise, there is relative rotation between the wear plate 15 and the screw 8. The wear plate 15 is an annular structure and is coaxial with the one-way bearing sleeve 14.

[0029] A convex key 21 is symmetrically arranged in the inner cavity of the sliding sleeve 12, and a first retaining ring groove 24, a key groove 22 and a step boss 23 are arranged on the outer surface of the sliding sleeve 12 from left to right. An elastic retaining ring 25 for the shaft is provided in the retaining ring groove 24, and the one-way bearing 13 is fixedly mounted on the sliding sleeve 12 by means of a key and a key groove 22.

[0030] An integrated protrusion 18 is provided on the inner cavity wall of the shell 1. The protrusion 18 is a step sleeve with an "L"-shaped transverse cross-section. A symmetrically arranged long slide groove 19 is opened on the inner wall of the step sleeve, and a short slide groove 20 is opened on the inner wall of the step sleeve facing the left inner cavity. The long slide groove 19 and the short slide groove 20 are vertically arranged.

[0031] A bearing 9 is provided between the friction end cover 2 , the bearing end cover 16 and the lead screw 8 , and a small bearing end cover 17 is fixedly mounted on the sides of the friction end cover 2 and the bearing end cover 16 .

[0032] A second retaining ring groove 26 is formed on the inner wall of the one-way bearing sleeve 14 close to the retaining ring 11 , and a hole elastic retaining ring 27 is clamped in the second retaining ring groove 26 .

[0033] A spacer sleeve 30 is provided between the sliding sleeve 12 and the retaining ring 11 .

[0034] Specifically, the screw 8 is rotated clockwise to drive the nut 10 to move a certain distance to the left, and at the same time, the screw 8 drives the wear plate 15 to rotate synchronously, and the nut 10 begins to compress the main compression spring 6, and the main compression spring 6 pushes the one-way bearing assembly 4 to move to the left. Finally, the clockwise rotating wear plate 15 contacts the fixed friction plate 5 and generates friction, which produces a damping effect on the screw 8 and prevents it from rotating clockwise. When the screw 8 continues to rotate, the pressure between the wear plate 15 and the friction plate 5 increases, resulting in an increase in friction, and the greater the damping generated on the screw 8, an equilibrium state is finally reached, that is, the rotation speed of the screw 8 is 0.

[0035] Take a weight of 100 kg as an example. The rope is wound around a disc with a diameter of 50 mm. The disc is fixed coaxially with the lead screw. The free end of the rope is fixed on the weight. When the weight falls from a high altitude, the lead screw is driven by the rope to rotate clockwise. The damper reduces the speed of the lead screw, and finally the weight falls from a high altitude. The first descent is a free fall with a fast speed. The second half of the descent is a deceleration motion. When the weight is about to reach the ground, the speed drops to 0. Therefore, the damper plays a buffering role in the process of the weight falling from a high altitude. When the weight is at different heights, the time of damping intervention can be adjusted by rotating the lead screw to achieve the same effect as above. When the weight is pulled up, or when the disc is rotated to lift the weight, there is no damping force on the rotating disc due to the one-way bearing in the damper.

[0036] The above description only describes the specific implementation mode of the present invention. Various examples do not limit the essential content of the present invention. After reading the description, ordinary technicians in the relevant technical field can modify or deform the specific implementation modes described above without departing from the essence and scope of the invention.

Claims

1. A one-way adjustable large torque rotary variable damper, comprising a housing (1) and a lead screw (8), wherein a friction end cover (2) cooperating with the housing (1) is provided on the left side of the housing (1), and a bearing end cover (16) cooperating with the housing (1) is provided on the right side of the housing (1), characterized in that: The inner wall of the shell (1) is provided with a protrusion (18) for dividing the inner cavity of the shell (1) into a left inner cavity and a right inner cavity, the inner wall of the right inner cavity of the shell (1) is symmetrically provided with a long slide groove (19), and the inner wall of the protrusion (18) facing the inner cavity on the left side is symmetrically provided with a short slide groove (20). A lead screw (8) is inserted into the housing (1), a one-way bearing assembly (4) is sleeved on the lead screw (8) located in the left chamber, a friction plate (5) is fixedly mounted on the right side of the friction end cover (2), a wear plate (15) is fixedly mounted on the left side of the one-way bearing assembly (4), a distance is provided between the friction plate (5) and the wear plate (15), a secondary compression spring (7) is sleeved on the lead screw (8) between the friction end cover (2) and the one-way bearing assembly (4), A nut (10) is provided on the lead screw (8) located in the right chamber and matched with the thread thereof, a main compression spring (6) is sleeved on the lead screw (8) between the one-way bearing assembly (4) and the nut (10), and a protrusion (29) is provided on the nut (10) and matched with the long slide groove (19) and moves in the long slide groove (19).

2. A one-way adjustable large torque rotary variable damper as claimed in claim 1, characterized in that: The one-way bearing assembly (4) comprises a sliding sleeve (12), a retaining ring (11) and a one-way bearing sleeve (14); a one-way bearing (13) is arranged between the sliding sleeve (12) and the one-way bearing sleeve (14); a retaining ring (11) is arranged on the right end of the sliding sleeve (12); a limiting protrusion (28) matching with the short slide groove (20) is arranged on the retaining ring (11); and a wear plate (15) is fixedly installed on the left side surface of the one-way bearing sleeve (14).

3. A one-way adjustable large torque rotary variable damper as claimed in claim 2, characterized in that: The inner cavity of the sliding sleeve (12) is symmetrically provided with a convex key (21), and the outer surface of the sliding sleeve (12) is provided with a first retaining ring groove (24), a key groove (22) and a step boss (23) in sequence from left to right. An elastic retaining ring (25) for the shaft is provided in the retaining ring groove (24), and the one-way bearing (13) is fixedly mounted on the sliding sleeve (12) through a key and a key groove (22).

4. A one-way adjustable large torque rotary variable damper as claimed in claim 1, characterized in that: The inner cavity wall of the shell (1) is provided with an integrated protrusion (18), the protrusion (18) is a step sleeve with an "L"-shaped transverse cross-section, the inner wall of the step sleeve is provided with symmetrically arranged long slide grooves (19), and the inner wall of the step sleeve facing the inner cavity on the left side is provided with a short slide groove (20), and the long slide groove (19) and the short slide groove (20) are vertically arranged.

5. The one-way adjustable large torque rotary variable damper according to claim 1, characterized in that: A bearing (9) is arranged between the friction end cover (2), the bearing end cover (16) and the lead screw (8), and a small bearing end cover (17) is fixedly installed on the side of the friction end cover (2) and the bearing end cover (16).

6. A one-way adjustable large torque rotary variable damper as claimed in claim 2, characterized in that: A second retaining ring groove (26) is provided on the inner wall of the one-way bearing sleeve (14) close to the retaining ring (11), and a hole elastic retaining ring (27) is clamped in the second retaining ring groove (26).

7. A one-way adjustable large torque rotary variable damper as claimed in claim 2, characterized in that: A spacer sleeve (30) is provided between the sliding sleeve (12) and the retaining ring (11).

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