One-way damper

Abstract

The utility model belongs to the technical field of dampers, and particularly relates to a one-way damper which comprises an outer sleeve, an inner rotating shaft and a packaging cover, one end of the outer sleeve is a closed end, the other end of the outer sleeve is an open end, an annular protruding disc is arranged on the surface of the inner rotating shaft, the side, on the annular protruding disc, of the inner rotating shaft is an outer end portion, and the other side of the inner rotating shaft is an inner end portion. The packaging cover is sleeved on the outer surface of the outer end part of the inner rotating shaft; and the packaging cover, the annular convex disc and the inner end part of the inner rotating shaft are inserted into the outer sleeve from the open end of the outer sleeve. Through the arrangement of the packaging cover, the packaging cover is of a structure composed of a plastic sleeve ring and a wear-resisting copper ring, the wear-resisting copper ring can improve the wear resistance in the twisting process, so that the service life is prolonged, the inner rotating shaft is a stainless steel component, the strength is improved compared with a common zinc alloy component, and therefore the shaft breaking phenomenon easily occurring in the high-frequency twisting process is avoided; and the annular convex discs are symmetrically arranged, so that the sealing ring can be limited, and the sealing ring can be fixed more firmly.

Description

Technical Field

[0001] This utility model belongs to the field of damper technology, specifically relating to a unidirectional damper. Background Technology

[0002] A unidirectional rotary damper is a device specifically designed to provide damping force in a single direction. Its main characteristic is that it generates resistance only in one direction, while offering little or no resistance in the opposite direction. This characteristic gives unidirectional rotary dampers significant advantages in specific applications. Unidirectional rotary dampers achieve their unidirectional damping effect through special internal structures (such as unidirectional bearings and rubber inserts). They are characterized by resistance to high and low temperatures, small size, and compact structure, effectively slowing down the rotational speed of objects. When the rotation direction matches its design direction, the damper generates significant resistance, while the resistance in the opposite direction is small or even negligible, improving the product's lifespan and performance.

[0003] Patent application (publication number: CN208057800U) discloses a damper comprising: a lower seat, a rotating shaft, and a upper cover. One end of the lower seat is closed, and the other end is open. The rotating shaft has an annular flange, and the upper cover is positioned on top of the annular flange. The lower portion of the upper cover and the rotating shaft are inserted into the lower seat from the open end. The lower seat is rolled inwards at the open end until the upper cover is pressed tightly into the lower seat. This damper simplifies the manufacturing process, provides stronger impact resistance, and effectively prevents the rotating shaft from breaking and the outer casing from bursting.

[0004] In the aforementioned application, the lower seat is rolled inward by rolling the open end until the upper cover is pressed into the lower seat. As a result, the surface of the upper cover will experience a certain degree of wear during rotation, and over time, the lifespan of the damper will decrease. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a unidirectional damper that solves the problem of wear on the surface of the top cover during rotation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a unidirectional damper, comprising an outer sleeve, an inner rotating shaft, and a sealing cover. One end of the outer sleeve is a closed end, and the other end is an open end. The surface of the inner rotating shaft is provided with an annular convex plate. The inner rotating shaft has an outer end on one side of the annular convex plate and an inner end on the other side. The sealing cover is fitted onto the outer surface of the outer end of the inner rotating shaft. The sealing cover, the annular convex plate, and the inner end of the inner rotating shaft are inserted into the outer sleeve from the open end of the outer sleeve. There are two annular convex plates, and a sealing ring is installed between the two annular convex plates. The sealing cover includes a plastic collar and a wear-resistant copper ring installed on the outside of the plastic collar. The inner rotating shaft is a stainless steel component.

[0007] Preferably, the outer sleeve presses the encapsulation cap, annular convex disc, and inner end into the outer sleeve by rolling the open end inward.

[0008] Preferably, the inner rotating shaft includes an outer end, an annular cam, and an inner end, which are sequentially formed from one end to the other. The outer end, the annular cam, and the inner end are integrally formed. The outer end is located on the outside of the outer sleeve, and the surface of the outer end has parallel planar sidewalls.

[0009] Preferably, the outer sleeve has at least one fixing ear on its surface, and the fixing ear is fixedly connected to the outer surface of the outer sleeve.

[0010] Preferably, the inner wall of the outer sleeve is provided with two protruding bony positions for limiting the rotation angle of the inner rotating shaft.

[0011] Preferably, the inner end surface of the inner rotating shaft is provided with a plurality of outwardly protruding ribs, a valve plate is sleeved on the outside of the ribs, and an oil passage groove corresponding to the ribs is opened in the valve plate. An oil passage hole is opened on one side of the valve plate, and a hole corresponding to the oil passage hole is provided on the side wall of the inner end. The valve plate is movably disposed between two protruding ribs on the inner wall of the outer sleeve.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This unidirectional damper, through the design of the encapsulation cover, is a structure composed of a plastic collar and a wear-resistant copper ring. The wear-resistant copper ring increases wear resistance during torsion, thus extending its service life. The inner rotating shaft is made of stainless steel, which improves strength compared to common zinc alloy components, thereby avoiding shaft breakage that is prone to occur during high-frequency torsion and further improving its lifespan. The annular convex disc adopts a symmetrical arrangement, which can restrict the sealing ring, making the sealing ring more secure and further enhancing the sealing performance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model, used together with the embodiments of this utility model to explain this utility model, and do not constitute a limitation on this utility model. In the drawings:

[0015] Figure 1 This is a complete structural schematic diagram of the present invention;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 This is a structural diagram of the outer sleeve of this utility model;

[0018] Figure 4 This is the cross-sectional structure of the present invention. Figure 1 ;

[0019] Figure 5 This is the cross-sectional structure of the present invention. Figure 2 ;

[0020] Figure 6 This is a structural diagram of the packaging cover of this utility model.

[0021] In the diagram: 1. Outer sleeve; 11. Fixing ear; 12. Protruding rib; 2. Inner shaft; 21. Outer end; 22. Inner end; 23. Protruding strip; 24. Valve plate; 25. Oil groove; 26. Oil hole; 27. Hole position; 3. Sealing cap; 31. Plastic collar; 32. Wear-resistant copper ring; 4. Annular convex disc; 5. Sealing ring. Detailed Implementation

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

[0023] Please see Figure 1-6The present invention provides the following technical solution: a unidirectional damper, comprising an outer sleeve 1, an inner rotating shaft 2, and a sealing cover 3. One end of the outer sleeve 1 is a closed end, and the other end is an open end. The surface of the inner rotating shaft 2 is provided with an annular convex plate 4. The inner rotating shaft 2 has an outer end 21 on one side of the annular convex plate 4 and an inner end 22 on the other side. The sealing cover 3 is fitted onto the outer surface of the outer end 21 of the inner rotating shaft 2. The sealing cover 3, the annular convex plate 4, and the inner end 22 of the inner rotating shaft 2 are inserted into the outer sleeve 1 from the open end of the outer sleeve 1. There are two annular convex plates 4. A sealing ring 5 is installed between the two annular convex plates 4. The sealing cover 3 includes a plastic collar 31 and a wear-resistant copper ring 32 installed on the outside of the plastic collar 31. The inner rotating shaft 2 is a stainless steel component.

[0024] In this embodiment, the encapsulation cover 3 is a structure composed of a plastic collar 31 and a wear-resistant copper ring 32. The wear-resistant copper ring 32 can increase wear resistance during the torsion process, thus extending the service life. The inner rotating shaft 2 is a stainless steel component, which improves the strength compared to common zinc alloy components, thereby avoiding the shaft breakage phenomenon that is prone to occur during high-frequency torsion and further improving the service life. The annular convex disc 4 adopts a symmetrical arrangement, which can restrict the sealing ring 5, making the sealing ring 5 more firmly fixed and further enhancing the sealing degree.

[0025] Specifically, the outer sleeve 1 presses the encapsulation cover 3, the annular convex disk 4 and the inner end 22 into the outer sleeve 1 by rolling the edge inward at the open end. Thus, the outer sleeve 1, the encapsulation cover 3, the annular convex disk 4 and the inner end 22 form a damper as a whole. The wear-resistant copper ring 32 of the encapsulation cover 3 contacts the inner wall of the outer sleeve 1, which helps to improve wear resistance.

[0026] Specifically, the inner rotating shaft 2 includes an outer end 21, an annular cam 4 and an inner end 22 from one end to the other. The outer end 21, the annular cam 4 and the inner end 22 are integrally formed. The outer end 21 is located on the outside of the outer sleeve 1. The surface of the outer end 21 is provided with mutually parallel planar sidewalls, so that the stress can be dispersed when the inner rotating shaft 2 rotates, reducing the possibility of breakage.

[0027] Specifically, the outer sleeve 1 has at least one fixing ear 11 on its surface. The fixing ear 11 is fixedly connected to the outer surface of the outer sleeve 1. The fixing ear 11 can be used to restrict the outer sleeve 1.

[0028] Specifically, the inner wall of the outer sleeve 1 is provided with two protruding bone positions 12 for limiting the rotation angle of the inner rotating shaft 2. The protruding bone positions 12 can limit the rotation angle of the inner rotating shaft 2 and prevent the inner rotating shaft 2 from rotating beyond the angle range.

[0029] Specifically, the inner end 22 of the inner rotating shaft 2 has multiple protruding ribs 23 on its surface. A valve plate 24 is sleeved on the outside of the ribs 23. The ribs 23 facilitate the movable installation of the valve plate 24. The valve plate 24 has an oil passage groove 25 corresponding to the ribs 23. An oil passage hole 26 is opened on one side of the valve plate 24. The side wall of the inner end 22 has a hole 27 corresponding to the oil passage hole 26. The valve plate 24 is movably disposed between two protruding ribs 12 on the inner wall of the outer sleeve 1. The hole 27, in conjunction with the oil passage hole 26 and the oil passage groove 25, helps the damping oil to fill between the ribs 23 and the valve plate 24, facilitating the flow of the damping oil.

[0030] The working principle or usage process of this utility model is as follows: First, damping oil is added to the outer sleeve 1. Since the inner rotating shaft 2 consists of an outer end 21, an annular convex plate 4, and an inner end 22 from one end to the other, and the outer end 21, annular convex plate 4, and inner end 22 are integrally formed, the sealing ring 5 can be fitted onto the annular convex plate 4. Then, the encapsulation cover 3 is assembled so that the wear-resistant copper ring 32 is fitted onto the surface of the plastic collar 31. The plastic collar 31 is then installed onto the surface of the inner rotating shaft 2. Next, the assembled inner rotating shaft 2 is inserted into the outer sleeve 1. Then, the open end of the outer sleeve 1 is rolled inward to press the encapsulation cover 3, annular convex plate 4, and inner end 22 into the outer sleeve 1. The sealing ring 5 can prevent damping oil leakage, and the wear-resistant copper ring 32 can increase wear resistance during the torsion process, thus extending the service life. The inner rotating shaft 2 is a stainless steel component, which improves the strength compared to common zinc alloy components, thereby avoiding the shaft breakage phenomenon that is prone to occur during high-frequency torsion and further improving the service life.

[0031] Finally, it should be noted that the above descriptions are merely preferred embodiments of this utility model and are not intended to limit the utility model. The selection and detailed description of these embodiments in this specification are for the purpose of better explaining the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A unidirectional damper, comprising an outer sleeve (1), an inner rotating shaft (2), and a sealing cover (3), wherein one end of the outer sleeve (1) is a closed end and the other end is an open end; the surface of the inner rotating shaft (2) is provided with an annular convex disk (4); the inner rotating shaft (2) has an outer end (21) on one side of the annular convex disk (4) and an inner end (22) on the other side; the sealing cover (3) is fitted onto the outer surface of the outer end (21) of the inner rotating shaft (2); the sealing cover (3), the annular convex disk (4), and the inner end (22) of the inner rotating shaft (2) are inserted into the outer sleeve (1) from the open end of the outer sleeve (1), characterized in that: The number of the annular convex discs (4) is two, and a sealing ring (5) is installed between the two annular convex discs (4). The encapsulation cover (3) includes a plastic collar (31) and a wear-resistant copper ring (32) installed on the outside of the plastic collar (31). The inner rotating shaft (2) is a stainless steel component.

2. The unidirectional damper according to claim 1, characterized in that: The outer sleeve (1) presses the sealing cap (3), the annular convex disc (4) and the inner end (22) into the outer sleeve (1) by rolling the open end inward.

3. A unidirectional damper according to claim 1, characterized in that: The inner rotating shaft (2) includes an outer end (21), an annular cam (4) and an inner end (22) from one end to the other. The outer end (21), annular cam (4) and inner end (22) are integrally formed. The outer end (21) is located on the outside of the outer sleeve (1). The surface of the outer end (21) is provided with mutually parallel planar sidewalls.

4. A unidirectional damper according to claim 1, characterized in that: The outer sleeve (1) is provided with at least one fixing ear (11) on its surface, and the fixing ear (11) is fixedly connected to the outer surface of the outer sleeve (1).

5. A unidirectional damper according to claim 1, characterized in that: The inner wall of the outer sleeve (1) is provided with two protruding bone positions (12) for limiting the rotation angle of the inner rotating shaft (2).

6. A unidirectional damper according to claim 1, characterized in that: The inner end (22) of the inner rotating shaft (2) has a plurality of protruding ribs (23) on its surface. A valve plate (24) is sleeved on the outside of the ribs (23), and an oil groove (25) corresponding to the ribs (23) is opened in the valve plate (24). An oil hole (26) is opened on one side of the valve plate (24), and a hole (27) corresponding to the oil hole (26) is provided on the side wall of the inner end (22). The valve plate (24) is movably disposed between two protruding ribs (12) on the inner wall of the outer sleeve (1).

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