A rotating damper

Abstract

This utility model discloses a rotary damper, including a housing, an inner rotating body rotatably located within the housing, a rotating rod penetrating the housing and the inner rotating body, and a torsion spring sleeved on the rotating rod. The inner rotating body has a receiving groove on its cylindrical outer wall, and a rubber ring is provided in the receiving groove. The inner rotating body is embedded in the housing, and the rubber ring is tightly fitted against the cylindrical cavity. One end of the rotating rod extends outside the housing and is fitted with an end cap; the other end of the rotating rod extends outside the inner rotating body. One end of the torsion spring is fixed to the inner rotating body, and the other end of the torsion spring abuts against a rod sleeve, which is fixed to the rotating rod. The damper provided by this utility model breaks away from the stereotypical structure of traditional damping oil-type dampers. During rotation, the rubber ring acts as a buffer medium. Simultaneously, the force exerted by the torsion spring against the inner rotating body changes during rotation, causing a change in the force between the inner rotating body and the housing, thus achieving a damping effect. The entire damper is easy to assemble, and easily replaces easily damaged parts, and there is no problem of damping oil leakage and pollution.

Description

Technical Field

[0001] This utility model relates to the field of mechanical automation equipment, and more specifically to a rotary damper that uses a rubber ring instead of damping oil. Background Technology

[0002] Dampers are installed in products to provide resistance to motion, reduce kinetic energy, and thus act as a buffer. Dampers have a wide range of applications; among them, rotary dampers are used in roll-up products such as screens.

[0003] These rotary dampers typically consist of a housing, a spindle, a damping cavity, and damping oil. The housing houses other components, the spindle rotates relative to the housing and connects to a rotating component, and the damping cavity, located between the housing and the spindle, is filled with damping oil. Damping effect is achieved by controlling the flow of the damping oil. Damping oil is a high-viscosity liquid that acts as a buffer to slow the spindle's rotation. Due to factors such as ambient temperature or usage frequency, the damping oil can heat up and thin, often leading to leakage, which can contaminate the product and affect normal operation.

[0004] If a small amount of damping oil leaks from a rotary damper, the user can usually wipe up the leaked portion and continue using it. However, if the leakage is significant, the damper needs to be removed and replaced with a new one, or the damper needs to be disassembled and refilled with damping oil. Discarding the entire old damper would be a waste of resources. Refilling the damper with damping oil requires improved ease of disassembly and reassembly, and cleaning the damping oil inevitably causes some contamination. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a rotary damper that uses rubber rings instead of traditional damping oil to achieve a damping effect. The components are easy to assemble and disassemble, and it is convenient to replace easily damaged parts later.

[0006] According to one aspect of the present invention, a rotary damper is provided, comprising:

[0007] The housing has a first opening at one end, and a cylindrical cavity is formed inward from the first opening. The other end of the housing has a first end face with a first through hole.

[0008] The inner rotating body has a cylindrical outer wall with a receiving groove on the cylindrical outer wall. A rubber ring is provided in the receiving groove. The inner rotating body is embedded in the cylindrical cavity of the shell, and the rubber ring is tightly attached to the cylindrical cavity.

[0009] A rotating rod passes through the center of the inner rotating body, with one end of the rotating rod extending to the outside of the first through hole and having an end head installed thereon, and the other end of the rotating rod extending to the outside of the inner rotating body;

[0010] A torsion spring is sleeved on a rotating rod outside the inner rotating body. One end of the torsion spring is fixed to the inner rotating body, and the other end of the torsion spring abuts against a rod sleeve, which is fixed to the rotating rod.

[0011] Therefore, a rubber ring is fitted onto the inner rotating body, located between the shell and the inner rotating body. One end of the torsion spring is connected to the inner rotating body, and the other end abuts against the rod sleeve. When the rotating rod is rotated, the inner rotating body, the spring, and the rotating rod rotate synchronously relative to the shell. During the rotation, the rubber ring acts as a buffer medium. At the same time, the torsion spring deforms due to the deformation of its internal metal wires, causing the force of the torsion spring against the inner rotating body to change, and the force of the inner rotating body against the shell to change, thus achieving a damping effect. This new type of damper can achieve the damping effect without the use of traditional damping oil, avoiding pollution caused by damping oil leakage.

[0012] In some embodiments, a hollow cylindrical sleeve extends into the cylindrical cavity from the first through hole, through which the rotating rod passes. Thus, the housing has a cylindrical sleeve to limit the rotation of the rotating rod, making its rotation more stable. When this damper is applied to the product, the product operates more smoothly.

[0013] In some embodiments, the inner rotating body has a guide sleeve inside, and multiple connecting ribs are distributed between the guide sleeve and the inner wall of the inner rotating body. The guide sleeve is fitted onto the outside of a cylindrical sleeve. Thus, there is a gap between the inner rotating body and the shell. The assembly and cooperation of the guide sleeve and the cylindrical sleeve of the shell can improve the coaxiality of the assembly of the inner rotating body and the shell, as well as the stability during rotation. The inner wall of the inner rotating body and the guide sleeve are not solid, which can reduce weight. At the same time, the connecting ribs ensure the strength of the inner rotating body itself.

[0014] In some embodiments, there is a gap between the end face of the guide sleeve and the first end face of the housing. This reduces the contact area between the inner rotating body and the first end face of the housing, thereby reducing assembly errors and lowering the processing requirements for the inner rotating body.

[0015] In some embodiments, the inner rotating body has a boss on the side near the torsion spring, and the end of the torsion spring near the inner rotating body is bent to have an insertion part. The boss has an insertion port, and the insertion part of the torsion spring is placed in the insertion port. There is a gap between the end face of the torsion spring and the boss of the inner rotating body. As a result, the positioning and assembly of the torsion spring are very convenient, and the torsion spring and the inner rotating body can rotate synchronously.

[0016] In some embodiments, the rod sleeve includes a retaining ring and a rod cylinder. The rod cylinder is sleeved outside the rotating rod, and the torsion spring is sleeved outside the rod cylinder. One end of the torsion spring abuts against the retaining ring, and the retaining ring is fixed to the rotating rod. Thus, the top and interior of the torsion spring are supported, ensuring stable positioning of the torsion spring, preventing it from being suspended in the air during rotation, and improving product stability.

[0017] In some embodiments, the retaining ring has a recessed pin groove, and a first pin is mounted on the rotating rod, the first pin being embedded in the pin groove of the retaining ring. Thus, during assembly, the first pin is installed on the rotating rod, a rod sleeve is fitted onto the rotating rod to align the pin groove with the first pin, and the rotating rod is inserted into the inner rotating body. The insertion part of the torsion spring is then inserted into the insertion port of the inner rotating body, making assembly convenient.

[0018] In some embodiments, the end is a cuboid with a second opening forming a receiving cavity inward from the second opening. The rotating rod is inserted into the receiving cavity and fixed by a second pin or by screws. Thus, after the rotating rod is inserted into the inner rotating body and housing, it is fixed with the end and the second pin / or screws, making assembly and subsequent disassembly convenient. Simply remove the second pin / or screws, remove the end, and the rotating rod can be pulled out. This also facilitates the replacement of easily damaged parts and promotes resource sorting and recycling.

[0019] In some embodiments, the first end face of the housing protrudes from the outer wall of the housing to form a flange, and the outer wall of the housing is provided with a positioning latching portion, the end of which extends to the flange, and the top of which is arc-shaped. This facilitates the positioning and connection of the housing with other product components.

[0020] Compared with existing technologies, the advantages of this utility model are: the rotary damper provided by this utility model has a novel structure, breaking the stereotype that traditional dampers must use damping oil. A rubber ring is placed in a groove on the inner rotating body, and the inner rotating body with the rubber ring is embedded into the shell. The rod sleeve and rotating rod are assembled and fitted with a torsion spring. The rotating rod is inserted into the inner rotating body and passes through the first through hole along the cylindrical sleeve of the shell, and is fixed with an end and a second pin / or screw. The assembly of the entire damper is convenient. Furthermore, if the rubber ring or torsion spring needs to be replaced later, the second pin / or screw can be directly removed, the end removed, and the rotating rod pulled out for replacement, which is very convenient. In the damper described in this application, during rotation, the rubber ring acts as a buffer medium. Simultaneously, the force of the torsion spring against the inner rotating body changes during rotation, causing a change in the force between the inner rotating body and the shell, thereby achieving a damping effect. Compared to traditional damping oil-based dampers, the damper provided in this application does not have the problem of damping oil leakage and pollution, nor does it suffer from poor damping effect due to the damping oil heating and melting. Attached Figure Description

[0021] Figure 1 This is a perspective view of one embodiment of the rotary damper of this utility model;

[0022] Figure 2 yes Figure 1 A stereoscopic view from another perspective;

[0023] Figure 3 yes Figure 1 Internal structure diagram;

[0024] Figure 4 This is a schematic diagram of the shell structure;

[0025] Figure 5 This is a schematic diagram of the internal rotating body. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments.

[0027] like Figure 1 and Figure 3 As shown, the rotary damper of one embodiment of this utility model includes a housing 1, an inner rotating body 2, a rotating rod 4, and a torsion spring 7. One end of the housing 1 has a first opening 11, and a cylindrical cavity 12 extends from the first opening 11 into the interior of the housing 1. The other end of the housing 1 has a first end face 13, and a first through hole 14 is formed on the first end face 13. The inner rotating body 2 has a cylindrical outer wall 21, and multiple receiving grooves 22 are formed on the cylindrical outer wall 21. The receiving grooves 22 are grooves with concentric arc-shaped bottoms. A rubber ring 3 is fitted inside each receiving groove 22. The lower half of the rubber ring 3 is embedded in the receiving groove 22, and the upper half of the rubber ring 3 protrudes relative to the inner rotating body 2. Figure 3 The middle section is a temporary receiving groove 22, and the rubber ring 3 is not fully installed. During damper assembly, the inner rotating body 2 is embedded in the cylindrical cavity 12 of the housing 1, and the rubber ring 3 is tightly attached to the cylindrical cavity 12. The rotating rod 4 passes through the center of the inner rotating body 2. One end of the rotating rod 4 extends to the outside of the first through hole 14 and is equipped with an end head 8. The other end of the rotating rod 4 extends to the outside of the inner rotating body 2 and a torsion spring 7 is sleeved at that end. One end of the torsion spring 7 is fixed to the inner rotating body 2, and the other end of the torsion spring 7 abuts against a rod sleeve 5, fixing the rod sleeve 5 to the rotating rod 4.

[0028] To better position the rotating rod 4, a hollow cylindrical sleeve 15 extends into the cylindrical cavity 12 from the first through hole 14 of the housing 1. The cylindrical sleeve 15 allows the rotating rod 4 to pass through, thereby limiting the rotation of the rotating rod 4 and making the rotation of the rotating rod 4 more stable.

[0029] like Figure 4 As shown, the outer periphery of the first end face 13 of the housing 1 protrudes from the outer wall of the housing 1 to form a flange 16. The outer wall of the housing 1 has a positioning latching portion 17, the end of which extends to the flange 16. The top of the positioning latching portion 17 is arc-shaped, which facilitates the positioning and connection of the housing 1 with other product components. An outwardly protruding protrusion 18 is provided on the outer surface of the first end face 13 of the housing 1. The center of the protrusion 18 allows the rotating rod 4 to pass through, and the protrusion 18 prevents the end 8 from being tightly pressed against the first end face 13 of the housing 1.

[0030] like Figure 3 and 5As shown, the inner rotating body 2 has a guide sleeve 23 inside. The guide sleeve 23 is hollow inside, and multiple connecting ribs 24 are distributed between the guide sleeve 23 and the inner wall of the inner rotating body 2. When the inner rotating body 2 is assembled with the shell 1, the inner rotating body 2 is embedded in the cylindrical cavity 12, and the guide sleeve 23 is fitted onto the cylindrical sleeve 15. The length of the guide sleeve 23 is shorter than the length of the outer wall of the inner rotating body 2, so that there is a gap 101 between the end face of the guide sleeve 23 and the first end face 13 of the shell 1. This reduces the contact area between the inner rotating body 2 and the first end face 13 of the shell 1, reduces assembly errors, and also lowers the processing requirements of the inner rotating body 2. There is a gap 102 between the outer wall of the inner rotating body 2 and the inner wall of the shell 1. The assembly and cooperation of the guide sleeve 23 with the cylindrical sleeve 15 of the shell 1 can improve the coaxiality of the inner rotating body 2 and the shell 1 during assembly, as well as the stability during rotation. The inner wall of the inner rotating body 2 and the guide sleeve 23 are not solid, which can reduce weight. At the same time, the connecting ribs 24 are used to ensure the strength of the inner rotating body 2 itself.

[0031] like Figure 2 and Figure 3 As shown, the inner rotating body 2 has a boss 25 on the side near the torsion spring 7, and an insertion port 26 is provided on the boss 25. The insertion port 26 is a blind hole. The end of the torsion spring 7 near the inner rotating body 2 is bent to have an insertion part 71. During assembly, the insertion part 71 of the torsion spring 7 is placed in the insertion port 26, and the torsion spring 7 and the inner rotating body 2 are positioned as one unit to achieve synchronous rotation. There is a gap between the end face of the torsion spring 7 and the boss 25 of the inner rotating body 2.

[0032] The sleeve 5 includes a retaining ring 51 and a sleeve 52, both of which are hollow, allowing the rotating rod 4 to pass through. The sleeve 52 is fitted over the rotating rod 4, the retaining ring 51 is fixed to the rotating rod 4, and the torsion spring 7 is fitted over the sleeve 52, with its top end abutting against the retaining ring 51. This provides support for both the top and interior of the torsion spring 7, ensuring stable positioning and preventing it from being suspended during rotation, thus improving product stability. Fixing the rotating rod 4 to the retaining ring 51 is simple. The top surface of the retaining ring 51 has a recessed pin groove 511. During assembly, a first pin 6 is installed on the rotating rod 4, and the sleeve 5 is fitted over the rotating rod 4, aligning the pin groove 511 with the first pin 6. The first pin 6 is then embedded in the pin groove 511 of the retaining ring 51. Then, the rotating rod 4 is inserted into the cylindrical sleeve 15 of the inner rotating body 2 and the housing 1, and the insertion part 71 of the torsion spring 7 is inserted into the insertion port 26 of the inner rotating body 2.

[0033] The end head 8 is a cuboid with a second opening. A receiving cavity 81 extends from the second opening into the end head 8, fitting the rotating rod 4. The receiving cavity 81 is cylindrical and is inserted into the receiving cavity 81 and secured by a second pin 9, or by screws (not shown). If secured by a pin, holes are drilled in both the rotating rod 4 and the end head 8 to allow the second pin 9 to be inserted and secured. If secured by screws, a through hole or threaded hole is drilled in the end head 8, and a threaded hole is drilled in the rotating rod 4, allowing the screws to lock the two together. This securing method facilitates assembly and disassembly. The second pin 9 and / or screws are removed, and the end head 8 is taken off to pull out the rotating rod 4. It also makes it convenient to replace easily damaged parts later and facilitates resource sorting and recycling.

[0034] In this embodiment, the housing 1, inner rotating body 2, rod sleeve 5, and end cap 8 are all one-piece molded plastic parts, while the rotating rod 4 and torsion spring 7 are metal parts. When assembling the damper, a rubber ring 3 is fitted onto the receiving groove 22 of the inner rotating body 2; the inner rotating body 2 with the rubber ring 3 is embedded into the housing 1, with the rubber ring 3 located between the housing 1 and the inner rotating body 2; the rod sleeve 5 is fixed to one end of the rotating rod 4 with the first pin 6, and the torsion spring 7 is fitted on it; the other end of the rotating rod 4 is inserted into the inner rotating body 2 and passes through the first through hole 14 along the cylindrical sleeve 15 of the housing 1; the end cap 8 is fitted onto the end of the rotating rod 4 and fixed with the second pin 9 or screws. Assembly is very convenient. If other components such as the rubber ring 3 or torsion spring 7 need to be replaced later, the second pin 9 / or screws can be directly removed, the end cap 8 removed, and the rotating rod 4 pulled out for replacement, which is very convenient.

[0035] This rotary damper is applied to a retractable screen. The housing 1 is inserted into the screen core tube and positioned by the positioning latch 17 of the housing 1. The end 8 is assembled into the end caps on both sides of the screen. When the screen is retracted or released, the housing 1 rotates with the screen core tube, and the housing 1 rotates relative to the inner rotating body 2.

[0036] This utility model provides a novel rotary damper structure, breaking the stereotype that traditional dampers must use damping oil. During rotation, the rubber ring 3 acts as a buffer medium. Simultaneously, the force exerted by the torsion spring 7 against the inner rotating body 2 changes during rotation, causing a change in the force between the inner rotating body 2 and the shell 1, thus achieving a damping effect. Compared to traditional damping oil-based dampers, the damper provided in this application eliminates the problem of damping oil leakage and contamination, and avoids the issue of poor damping performance due to the damping oil melting from heat.

[0037] The above descriptions are merely some embodiments of this utility model. It should be noted that those skilled in the art can make other modifications and improvements without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A rotary damper, characterized in that, include: The housing (1) has a first opening (11) at one end and a cylindrical cavity (12) is formed inward from the first opening (11). The housing (1) has a first end face (13) at the other end and a first through hole (14) at the first end face (13). The inner rotating body (2) has a cylindrical outer wall (21) and a receiving groove (22) on the cylindrical outer wall (21). A rubber ring (3) is fitted on the receiving groove (22). The inner rotating body (2) is embedded in the cylindrical cavity (12) of the shell (1), and the rubber ring (3) is in close contact with the cylindrical cavity (12). Rotating rod (4), the rotating rod (4) passes through the center of the inner rotating body (2), one end of the rotating rod (4) extends to the outside of the first through hole (14) and is equipped with an end head (8), and the other end of the rotating rod (4) extends to the outside of the inner rotating body (2); Torsion spring (7), the torsion spring (7) is sleeved on the rotating rod (4) outside the inner rotating body (2), one end of the torsion spring (7) is fixed to the inner rotating body (2), and the other end of the torsion spring (7) abuts against a rod sleeve (5), the rod sleeve (5) is fixed to the rotating rod (4).

2. The rotary damper according to claim 1, wherein A hollow cylindrical sleeve (15) extends into the cylindrical cavity (12) from the first through hole (14), and the rotating rod (4) passes through the cylindrical sleeve (15).

3. The rotary damper of claim 2, wherein The inner rotating body (2) has a guide sleeve (23) inside, and there are multiple connecting ribs (24) between the guide sleeve (23) and the inner wall of the inner rotating body (2). The guide sleeve (23) is fitted outside the cylindrical sleeve (15).

4. The rotary damper of claim 3, wherein There is a gap between the end face of the guide sleeve (23) and the first end face (13) of the housing (1).

5. The rotary damper according to claim 1 or 4, characterized in that The inner rotating body (2) has a boss (25) on one side of the torsion spring (7). The end of the torsion spring (7) near the inner rotating body (2) is bent to have an insertion part (71). The boss (25) has an insertion port (26). The insertion part (71) of the torsion spring (7) is placed in the insertion port (26). There is a gap between the end face of the torsion spring (7) and the boss (25) of the inner rotating body (2).

6. The rotary damper of claim 5, wherein The rod sleeve (5) includes a retaining ring (51) and a rod tube (52). The rod tube (52) is sleeved outside the rotating rod (4). The torsion spring (7) is sleeved outside the rod tube (52). One end of the torsion spring (7) abuts against the retaining ring (51). The retaining ring (51) is fixed to the rotating rod (4).

7. The rotary damper of claim 6, wherein The retaining ring (51) has a recessed pin groove (511), and the rotating rod (4) is equipped with a first pin (6), which is embedded in the pin groove (511) of the retaining ring (51).

8. The rotary damper of claim 1, wherein, The end (8) is a cuboid and has a receiving cavity (81). The rotating rod (4) is inserted into the receiving cavity (81) and fixed by a second pin or by screws.

9. The rotary damper of claim 1, wherein, The first end face (13) of the housing (1) protrudes from the outer wall of the housing (1) to form a protruding edge (16). The outer wall of the housing (1) is provided with a positioning snap-fit ​​part (17). The end of the positioning snap-fit ​​part (17) extends to the protruding edge (16). The top of the positioning snap-fit ​​part (17) is arc-shaped.

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