Damper and method of manufacture

Abstract

The application discloses a damper and a preparation method. The damper comprises a shell and a rotor located in a containing space of the shell, the rotor and the shell can rotate relative to each other; an outer wall of the rotor is provided with a first limiting protrusion and a second limiting protrusion in a circumferential direction, the first limiting protrusion and the second limiting protrusion are arranged in a direction of an axis of the rotor; the shell comprises a shell end and a shell side wall, the shell end is a bent part formed by hot riveting, the bent part and an inner part of the shell side wall form a first groove, and the first limiting protrusion is located in the first groove; the inner part of the shell side wall is provided with a second groove in a circumferential direction, the second groove and the first groove are arranged in the direction of the axis of the rotor, and the second limiting protrusion is clamped in the second groove. The structure of the damper can avoid damage of the shell under high pressure impact of the rotor, and ensure stable performance of the damper.

Description

Technical Field

[0001] This application belongs to the field of damper technology, specifically relating to a damper and its preparation method. Background Technology

[0002] In current mass-produced vehicles, the dampers used are either small low-torque or large high-torque dampers, or small metal dampers. Large high-torque dampers have limitations in terms of space layout, while metal dampers are expensive. To meet various needs, injection-molded dampers have been designed. Injection-molded dampers can meet both price and high torque requirements, but their strength is limited and they cannot withstand high-pressure impacts, leading to unstable performance. Summary of the Invention

[0003] The purpose of this application is to provide a damper and its manufacturing method to solve the problem of unstable performance of existing small dampers.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application provide a damper, comprising: a housing and a rotor located in an accommodating space of the housing, wherein the rotor is rotatable relative to the housing;

[0006] The outer wall of the rotor has a first limiting protrusion and a second limiting protrusion arranged circumferentially, and the first limiting protrusion and the second limiting protrusion are spaced apart in the axial direction of the rotor.

[0007] The housing includes a housing end and a housing sidewall. The housing end is a bent portion formed by hot riveting. The bent portion and the interior of the housing sidewall form a first groove. The first limiting protrusion is located in the first groove.

[0008] The inner sidewall of the housing has a second groove arranged circumferentially, and the second groove and the first groove are spaced apart in the axial direction of the rotor. The second limiting protrusion is engaged in the second groove.

[0009] In one embodiment, the end of the housing surrounds the first surface of the first limiting protrusion;

[0010] The first surface is an arc-shaped surface.

[0011] In one embodiment, in the axial direction of the rotor, the first limiting protrusion is spaced from the inner wall of the first groove.

[0012] In one embodiment, the second surface of the first limiting protrusion is connected to the first surface, and the second surface is a plane.

[0013] In one embodiment, the second limiting protrusion is stepped.

[0014] In one embodiment, the second limiting protrusion includes a third surface and a fourth surface, the fourth surface being an inclined surface, and the included angle between the third surface and the fourth surface being a rounded corner.

[0015] In one embodiment, the outer wall of the rotor has a third groove arranged circumferentially;

[0016] Along the axial direction of the rotor, the third groove is spaced apart from the second limiting protrusion; a first sealing ring is disposed within the third groove.

[0017] In one embodiment, the housing includes an outer shell and an inner shell, the outer shell being fitted over the outer shell and connected to the inner shell at one end away from the rotor; an accommodating space exists between the outer shell and the inner shell; the housing end and the housing sidewall are located within the outer shell;

[0018] The sidewall of the housing has at least one first through hole, the edge of which is connected to the inner housing via a connecting plate, and the first through hole is not in communication with the accommodating space.

[0019] In one embodiment, the rotor includes: a rotor body and an extension connected to the rotor body;

[0020] The first limiting protrusion and the second limiting protrusion are circumferentially arranged on the rotor body;

[0021] The extension extends into the accommodating space.

[0022] In one embodiment, the rotor has a second through hole along the axial direction, and one end of the inner housing is located in the second through hole;

[0023] The inner housing has a protrusion on the surface opposite to the inner wall of the rotor, and the protrusion is stepped; the inner wall of the second through hole has a recess; a second sealing ring is provided between the protrusion and the recess.

[0024] Secondly, embodiments of this application also provide a method for manufacturing a damper, applied to the damper described in the first aspect, the method comprising:

[0025] The rotor of the damper is obtained using a mold. The outer wall of the rotor has a first limiting protrusion and a second limiting protrusion arranged circumferentially. The first limiting protrusion and the second limiting protrusion are spaced apart in the axial direction of the rotor.

[0026] A damper housing is obtained using a mold. The housing includes a housing end and a housing sidewall. The interior of the housing sidewall has a circumferentially arranged second groove.

[0027] The rotor is placed in the accommodating space of the housing, and the second limiting protrusion is engaged in the second groove;

[0028] The end of the housing is formed into a bent portion by a hot riveting process. The bent portion forms a first groove with the inside of the side wall of the housing, and the first limiting protrusion is located in the first groove.

[0029] In an embodiment of this application, the rotor of the damper has a first limiting protrusion and a second limiting protrusion arranged circumferentially. The inner sidewall of the damper housing has a second groove. When the rotor and housing are assembled, the second limiting protrusion engages within the second groove. The bent end of the housing, formed by thermal riveting, forms the first groove with the sidewall of the housing, and the first limiting protrusion is located within the first groove, with the bent end of the housing surrounding the first limiting protrusion. Through the engagement of the second limiting protrusion with the second groove, and the engagement of the first limiting protrusion with the thermally riveted first groove, the strength of the damper is effectively increased, preventing damage to the housing under the high-pressure impact of the rotor. The rate of torque change during rotor movement is small, ensuring stable performance of the damper. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0031] Figure 1 This is one of the structural schematic diagrams of the damper according to an embodiment of this application;

[0032] Figure 2 This is a second schematic diagram of the damper structure according to an embodiment of this application;

[0033] Figure 3 This is one of the schematic diagrams of the rotor structure in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the shell structure according to an embodiment of this application;

[0035] Figure 5 This is a second schematic diagram of the rotor structure according to an embodiment of this application;

[0036] Figure 6 This is the third schematic diagram of the damper structure according to an embodiment of this application;

[0037] Figure 7 This is the fourth schematic diagram of the damper structure according to an embodiment of this application;

[0038] Figure 8This is the fifth schematic diagram of the damper structure according to an embodiment of this application;

[0039] Figure 9 This is the sixth schematic diagram of the damper structure according to an embodiment of this application;

[0040] Figure 10 This is the seventh schematic diagram of the damper in the embodiments of this application.

[0041] Reference numerals: 1. Housing; 2. Rotor; 11. Housing end; 12. Housing sidewall; 13. Second groove; 14. Outer shell; 15. Inner shell; 16. First through hole; 21. First limiting protrusion; 22. Second limiting protrusion; 23. Third groove; 24. First sealing ring; 25. Rotor body; 26. Extension; 31. Protrusion; 32. Recess; 33. Second sealing ring; 111. First groove; 211. First surface; 212. Spacing; 213. Second surface; 221. Third surface; 222. Fourth surface; 161. Connecting plate; 251. Second through hole. Detailed Implementation

[0042] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0044] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] The damper and its manufacturing method according to embodiments of this application are described below with reference to the accompanying drawings.

[0047] like Figures 1 to 10 As shown, an embodiment of this application provides a damper, including:

[0048] The housing 1 and the rotor 2 located in the accommodating space of the housing 1, wherein the rotor 2 and the housing 1 are rotatable relative to each other;

[0049] The outer wall of the rotor 2 has a first limiting protrusion 21 and a second limiting protrusion 22 arranged circumferentially, and the first limiting protrusion 21 and the second limiting protrusion 22 are spaced apart in the axial direction of the rotor 2.

[0050] The housing 1 includes a housing end 11 and a housing side wall 12. The housing end 11 is a bent portion formed by hot riveting. The bent portion and the interior of the housing side wall 12 form a first groove 111. The first limiting protrusion 21 is located in the first groove 111.

[0051] The interior of the housing sidewall 12 has a circumferentially arranged second groove 13, which is spaced apart from the first groove 111 in the axial direction of the rotor 2, and the second limiting protrusion 22 is engaged in the second groove 13.

[0052] In this embodiment, the damper housing 1 has an internal accommodating space, and the rotor 2 is located within this accommodating space. The rotor 2 and the housing 1 can rotate relative to each other. The housing 1 has an opening, and the interior of the opening forms the accommodating space. The rotor 2 is connected to the housing 1 at the opening and extends into the accommodating space.

[0053] The structure of rotor 2 is as follows Figure 3As shown, a first limiting protrusion 21 is circumferentially arranged on the outer wall of the rotor 2. This can be understood as the first limiting protrusion 21 being located on the outer wall of the rotor 2 and arranged around its circumference, protruding beyond the outer wall of the rotor 2. Similarly, a second limiting protrusion 22 is provided at a distance from the first limiting protrusion 21 on the outer wall of the rotor 2. This second limiting protrusion 22 is also located on the outer wall of the rotor 2 and arranged around its circumference, protruding beyond the outer wall of the rotor 2. Figure 3 As shown, there is a gap between the first limiting protrusion 21 and the second limiting protrusion 22, which can be formed into a groove.

[0054] like Figure 4 The diagram shown is a partial structural schematic of the housing 1. The housing 1 includes a housing end 11 and a housing sidewall 12. The housing end 11 refers to the end located at the opening of the accommodating space of the housing 1, and the housing sidewall 12 is connected to the housing end 11. During the assembly of the rotor 2 and the housing 1, the housing end 11 is formed into a bent portion through a hot riveting process, as shown... Figure 4 As shown, the end portion 11 of the housing is bent towards the opening of the housing 1. Since the end portion 11 is connected to the side wall 12 of the housing, a first groove 111 is formed at the connection between the bent end portion 11 and the side wall 12 within the accommodating space. This first groove 111 surrounds the inner wall of the housing 1. Optionally, the thickness of the end portion 11 is less than the thickness of the side wall 12. A second groove 13 is also provided circumferentially inside the side wall 12, surrounding the inner wall of the housing 1. There is a gap between the first groove 111 and the second groove 13, such as... Figure 4 As shown, the gap can be formed into a raised limiting part.

[0055] When assembling the rotor 2 with the housing 1, the rotor 2 is first inserted into the accommodating space of the housing 1 through the opening, and the second limiting protrusion 22 is engaged in the second groove 13, so that the first limiting protrusion 21 is located in the first groove 111. The end 11 of the housing is formed into a bent portion using a hot riveting process, such as... Figure 1 and Figure 2 As shown, the bent end 11 of the housing surrounds the surface of the first limiting protrusion 21, thereby assembling the rotor 2 with the housing 1.

[0056] In an embodiment of this application, the rotor of the damper has a first limiting protrusion and a second limiting protrusion arranged circumferentially. The inner sidewall of the damper housing has a second groove. When the rotor and housing are assembled, the second limiting protrusion engages within the second groove. The bent end of the housing, formed by thermal riveting, forms the first groove with the sidewall of the housing, and the first limiting protrusion is located within the first groove, with the bent end of the housing surrounding the first limiting protrusion. Through the engagement of the second limiting protrusion with the second groove, and the engagement of the first limiting protrusion with the thermally riveted first groove, the strength of the damper is effectively increased, preventing damage to the housing under the high-pressure impact of the rotor. The rate of torque change during rotor movement is small, ensuring stable performance of the damper.

[0057] In one embodiment, the housing end 11 surrounds the first surface 211 of the first limiting protrusion 21; the first surface 211 is an arc-shaped surface.

[0058] In this embodiment, the end 11 of the housing is a bent portion formed by hot riveting, and the first surface 211 of the first limiting protrusion 21 is the surface that contacts the inner wall of the first groove 111. Figure 5 What is shown is Figure 1 An enlarged cross-sectional view of the rotor 2 shows that the first surface 211 is arc-shaped, and the inner surface of the housing end 11 can also be arc-shaped. The bent housing end 11 surrounds the first surface 211, and the two are spaced apart. For example, the first surface 211 and the inner surface of the housing end 11 are aligned along the rotor axis (e.g., ...). Figure 2 The first surface 211 and the inner side surface of the housing end 11 are spaced apart in the direction perpendicular to the rotor axis (e.g., in the vertical direction). Figure 2 The left and right directions (in the middle) also have intervals.

[0059] Optionally, in the axial direction of the rotor 2, the first limiting protrusion 21 and the inner wall of the first groove 111 are spaced 212 apart.

[0060] like Figure 1 and Figure 2 As shown, after the housing 1 and rotor 2 are thermally riveted together, in the axial direction of the rotor, for example... Figure 1 and Figure 2 As shown in the vertical direction, there is a certain gap between the first limiting protrusion 21 and the inner wall of the first groove 111. This gap ensures that after the housing 1 and the rotor 2 are thermally riveted, the rotor 2 can rotate freely without obstruction and without affecting the torque value. It should be noted that the embodiments of this application do not limit the size of the gap between the first limiting protrusion 21 and the inner wall of the first groove 111, as long as it can ensure that the rotor 2 rotates freely and meets the stability requirements of the rotor 2 during rotation.

[0061] Optionally, the second surface 213 of the first limiting protrusion 21 is connected to the first surface 211, and the second surface 213 is a plane.

[0062] The second surface 213 may be located at Figure 5 The plane below the first surface 211. The second surface 213 is connected to the first surface 211, together forming the outer surface of the first limiting protrusion 21. Optionally, the included angle at the connection between the second surface 213 and the first surface 211 can be greater than or equal to 90 degrees, and the included angle at the connection between the second surface 213 and the first surface 211 can also be a rounded corner, thereby preventing the rotor 2 from rubbing against the inner wall of the first groove 111 and generating large damping when rotating.

[0063] In one embodiment, the second limiting protrusion 22 is stepped. The shape of the second groove 13 corresponds to the shape of the second limiting protrusion 22, which can ensure the snap-fit ​​engagement of the second limiting protrusion 22 in the second groove 13.

[0064] Optionally, the second limiting protrusion 22 includes a third surface 221 and a fourth surface 222, wherein the fourth surface 222 is an inclined surface, and the included angle between the third surface 221 and the fourth surface 222 is a rounded corner.

[0065] like Figure 5 As shown, the third surface 221 of the second limiting protrusion 22 is the surface close to the second surface 213 of the first limiting protrusion 21. The fourth surface 222 of the second limiting protrusion 22 is connected to the third surface 221. The fourth surface 222 can be a slope, so the second limiting protrusion 22 is formed as a step with one end protruding. The included angle between the third surface 221 and the fourth surface 222 is a rounded corner, which can also be understood as the connection between the third surface 221 and the fourth surface 222 being an arc-shaped surface. On the one hand, this can reduce the friction between the second limiting protrusion 22 and the second groove 13. On the other hand, this design makes mold processing more convenient, avoids poor demolding after product molding, and facilitates product assembly.

[0066] Optionally, the second limiting protrusion 22 can also be designed as a protrusion of other shapes, such as rectangle, trapezoid, etc., and the included angle of different shaped protrusions can be set to rounded corners, as long as the second limiting protrusion 22 and the second groove 13 can be well engaged and the rotor can rotate without obstruction. These are not listed one by one here.

[0067] like Figure 2 and Figure 3As shown, the gap between the first limiting protrusion 21 and the second limiting protrusion 22 forms a groove, and the gap between the first groove 111 and the second groove 13 forms a protrusion. When the rotor 2 is assembled with the housing 1, the first limiting protrusion 21 is engaged in the first groove 111, and the second limiting protrusion 22 is engaged in the second groove 13. The protrusion formed by the gap between the first groove 111 and the second groove 13 is engaged in the groove formed by the gap between the first limiting protrusion 21 and the second limiting protrusion 22, which achieves a good fit between the rotor 2 and the housing 1 in the rotor axis direction, increases the strength of the damper, and ensures that the housing is not easily damaged under a large impact force when the rotor rotates, thus ensuring the stability of the damper performance.

[0068] In one embodiment, the outer wall of the rotor 2 has a circumferentially arranged third groove 23; in the axial direction of the rotor 2, the third groove 23 is spaced apart from the second limiting protrusion 22; a first sealing ring 24 is provided in the third groove 23.

[0069] like Figure 3 and Figure 5 As shown, a third groove 23 is also provided on the outer wall of the rotor 2, which is spaced apart from the second limiting protrusion 22. When the rotor 2 is assembled with the housing 1, a first sealing ring 24 is provided in the third groove 23 to prevent the liquid filling the housing space from leaking out. The shape of the third groove 23 is not limited here.

[0070] like Figure 6 As shown, the housing 1 includes an outer shell 14 and an inner shell 15. The outer shell 14 is fitted over the inner shell 15, and one end of the outer shell 14 away from the rotor 2 is connected to the inner shell 15. There is an accommodating space between the outer shell 14 and the inner shell 15. The housing end 11 and the housing sidewall 12 are located on the outer shell 14.

[0071] The side wall 12 of the housing has at least one first through hole 16, the edge of the first through hole 16 is connected to the inner housing 15 through a connecting plate 161, and the first through hole 16 is not in communication with the accommodating space.

[0072] In this embodiment, the damper housing 1 can be integrally formed. One end of the outer shell 14 has an opening, the edge of which is the housing end 11, and the housing sidewall 12 is the sidewall of the outer shell 14. The inner shell 15 is disposed inside the outer shell 14, and the inner shell 15 can be a hollow barrel structure. The other end of the outer shell 14 is connected to and sealed to the inner shell 15, forming the accommodating space between the outer shell 14 and the inner shell 15. The rotor 2 extends from the opening into the accommodating space, and the rotor 2 can rotate within the accommodating space.

[0073] It should be noted that the accommodating space is a portion of the space between the inner shell 15 and the outer shell 14. It can also be understood that there is a limiting part between the inner shell 15 and the outer shell 14, and the other area outside the limiting part is the accommodating space, so that when the rotor 2 rotates in the accommodating space, it does not rotate around the axis for one revolution, but can reciprocate within the accommodating space.

[0074] like Figure 6 As shown, the outer shell 14 has one or more first through holes 16. The edges of each first through hole 16 are connected to the inner shell 15 via connecting plates 161, ensuring that the first through hole 16 is not in communication with the accommodating space and preventing leakage of the liquid filling the accommodating space. Since there is a limiting portion between the inner shell 15 and the outer shell 14, and the shell 1 is thicker in the area of ​​this limiting portion, shrinkage may occur during shell fabrication. Therefore, the first through hole 16 prevents shrinkage during shell fabrication.

[0075] In one embodiment, the rotor 2 includes: a rotor body 25 and an extension 26 connected to the rotor body 25; a first limiting protrusion 21 and a second limiting protrusion 22 are circumferentially disposed on the rotor body 25; the extension 26 extends into the accommodating space.

[0076] Optionally, the rotor 2 has a second through hole 251 along the axial direction, and one end of the inner housing 15 is located in the second through hole 251; the surface of the inner housing 15 opposite to the inner wall of the rotor 2 has a protrusion 31, and the protrusion 31 is stepped; the inner wall of the second through hole 251 has a recess 32; a second sealing ring 33 is provided between the protrusion 31 and the recess 32.

[0077] like Figure 3 As shown, the first limiting protrusion 21, the second limiting protrusion 22, and the third groove 23 are all disposed on the outer wall of the rotor body 25, and an extension portion 26 extends from the bottom of the rotor body 25. A second through hole 251 is provided on the rotor body 25, as shown. Figure 3 and Figure 7 As shown, where Figure 7 This is a top view of the damper. When the rotor 2 is assembled with the housing 1, one end of the inner housing 15 extends into the second through hole 251, and the extension 26 extends into the accommodating space between the outer housing 14 and the inner housing 15. The first limiting protrusion 21 located on the rotor body 25 is engaged with the first groove 111 of the outer housing 14, and the second limiting protrusion 22 located on the rotor body 25 is engaged with the second groove 13 of the outer housing 14, thereby realizing the assembly and fixation of the housing 1 and the rotor 2.

[0078] like Figure 5The right side of the rotor cross-section shown is the inner wall of the second through hole 251, and the inner wall of the second through hole 251 has a recess 32; as shown Figure 2 and Figure 4 As shown, the outer wall of the inner housing 15 has a protrusion 31. After the rotor 2 is assembled with the housing 1, there is a space between the recess 32 and the protrusion 31, forming another accommodating space arranged circumferentially around the inner housing 15. A second sealing ring 33 is provided in the space between the recess 32 and the protrusion 31 to prevent the liquid filling the accommodating space between the outer housing 14 and the inner housing 15 from leaking out.

[0079] The assembly diagram of the housing 1, rotor 2, first sealing ring 24 and second sealing ring 33 is shown below. Figure 8 As shown. The first sealing ring 24 is disposed in the third groove 23 of the rotor 2, and the second sealing ring 33 is disposed on the inner wall of the second through hole 251 of the rotor 2. The extension 26 of the rotor 2 extends into the accommodating space between the outer shell 14 and the inner shell 15. The second limiting protrusion 22 circumferentially disposed on the outer wall of the rotor body 25 is engaged in the second groove 13 of the outer shell 14. The first limiting protrusion 21 circumferentially disposed on the outer wall of the rotor body 25 is located in the first groove 111 of the outer shell 14. The side wall 12 of the shell is formed into a bent portion by a hot riveting process, and the bent portion covers the surface of the first limiting protrusion 21. Liquid is filled in the accommodating space between the outer shell 14 and the inner shell 15 to provide resistance to the rotation of the rotor 2.

[0080] The assembled damper, such as Figure 9 and Figure 10 As shown in the figures, tests have demonstrated that the damper provided in this application embodiment can withstand a rotor pull-out force of over 250N, and under normal temperature conditions, multiple rotations (over 15,000 times) will not cause damage to the housing. The torque change rate is small, remaining within 10%. In high-temperature environments (e.g., 85 degrees Celsius), multiple rotations (e.g., 1500 times) will not cause damage to the housing, and the torque change rate remains small, remaining within 15%. Therefore, the damper of this application possesses high strength and durability.

[0081] In an embodiment of this application, the rotor of the damper has a first limiting protrusion and a second limiting protrusion arranged circumferentially. The inner sidewall of the damper housing has a second groove. When the rotor and housing are assembled, the second limiting protrusion engages within the second groove. The bent end of the housing, formed by thermal riveting, forms the first groove with the sidewall of the housing, and the first limiting protrusion is located within the first groove, with the bent end of the housing surrounding the first limiting protrusion. Through the engagement of the second limiting protrusion with the second groove, and the engagement of the first limiting protrusion with the thermally riveted first groove, the strength of the damper is effectively increased, preventing damage to the housing under the high-pressure impact of the rotor. The rate of torque change during rotor movement is small, ensuring stable performance of the damper.

[0082] This application also provides a method for manufacturing a damper, applied to the aforementioned damper, the method comprising:

[0083] The rotor of the damper is obtained using a mold. The outer wall of the rotor has a first limiting protrusion and a second limiting protrusion arranged circumferentially. The first limiting protrusion and the second limiting protrusion are spaced apart in the axial direction of the rotor.

[0084] A damper housing is obtained using a mold. The housing includes a housing end and a housing sidewall. The interior of the housing sidewall has a circumferentially arranged second groove.

[0085] The rotor is placed in the accommodating space of the housing, and the second limiting protrusion is engaged in the second groove;

[0086] The end of the housing is formed into a bent portion by a hot riveting process. The bent portion forms a first groove with the inside of the side wall of the housing, and the first limiting protrusion is located in the first groove.

[0087] In this embodiment, both the rotor and the housing of the damper can be integrally formed. The thickness of the housing end can be less than the thickness of the housing sidewall. During assembly, the extension of the rotor is inserted into the accommodating space between the outer and inner housings. The second limiting protrusion on the rotor body is engaged with the second groove of the outer housing. The first limiting protrusion on the rotor body is located inside the housing end. The housing end is formed into a bent portion by a hot riveting process. Figure 1 and Figure 2 As shown, the bent portion forms a first groove with the interior of the housing sidewall, and a first limiting protrusion is engaged within the first groove. The bent portion covers the surface of the first limiting protrusion. A first sealing ring is provided between the rotor and the outer housing, and a second sealing ring is provided between the rotor and the inner housing. Liquid is filled in the accommodating space between the outer housing and the inner housing to complete the assembly of the damper.

[0088] The damper provided in this application can be applied to various vehicle models, such as the pivot points of various covers, the center console of automobiles, etc. For example, it can be applied to components such as the center armrest and rear armrest of automobiles. This damper is not limited by space and can improve the user experience. For example, when the damper is applied to the pivot point of a cover, the pivot of the cover is passed through the through hole of the damper and fixed to both ends of the damper. The cover can rotate against the spring force without the need for a slide rail, and the damper can be kept stable with only one operation.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0090] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A damper, characterized in that, include: A housing (1) and a rotor (2) located in the accommodating space of the housing (1), the rotor (2) being rotatable relative to the housing (1); The outer wall of the rotor (2) has a first limiting protrusion (21) and a second limiting protrusion (22) arranged circumferentially, and the first limiting protrusion (21) and the second limiting protrusion (22) are spaced apart in the axial direction of the rotor (2). The housing (1) includes a housing end (11) and a housing side wall (12). The housing end (11) is a bent portion formed by hot riveting. The bent portion and the interior of the housing side wall (12) form a first groove (111). The first limiting protrusion (21) is located in the first groove (111). The interior of the side wall (12) of the housing has a second groove (13) arranged in a circumferential direction. The second groove (13) and the first groove (111) are spaced apart in the axial direction of the rotor (2). The second limiting protrusion (22) is engaged in the second groove (13).

2. The damper according to claim 1, characterized in that, The end of the housing (11) surrounds the first surface (211) of the first limiting protrusion (21); The first surface (211) is an arc-shaped surface.

3. The damper according to claim 1, characterized in that, In the axial direction of the rotor (2), the first limiting protrusion (21) is spaced (212) from the inner wall of the first groove (111).

4. The damper according to claim 2, characterized in that, The second surface (213) of the first limiting protrusion (21) is connected to the first surface (211), and the second surface (213) is a plane.

5. The damper according to claim 1, characterized in that, The second limiting protrusion (22) is stepped.

6. The damper according to claim 1 or 5, characterized in that, The second limiting protrusion (22) includes a third surface (221) and a fourth surface (222), the fourth surface (222) being an inclined surface, and the included angle between the third surface (221) and the fourth surface (222) being a rounded corner.

7. The damper according to claim 1, characterized in that, The outer wall of the rotor (2) has a third groove (23) arranged in a circumferential direction; In the axial direction of the rotor (2), the third groove (23) is spaced apart from the second limiting protrusion (22); a first sealing ring (24) is provided in the third groove (23).

8. The damper according to claim 1, characterized in that, The housing (1) includes an outer shell (14) and an inner shell (15). The outer shell (14) is fitted over the inner shell (15), and one end of the outer shell (14) away from the rotor (2) is connected to the inner shell (15). There is an accommodating space between the outer shell (14) and the inner shell (15). The end (11) of the housing and the side wall (12) of the housing are located on the outer shell (14). The sidewall (12) of the housing has at least one first through hole (16), the edge of the first through hole (16) is connected to the inner housing (15) through a connecting plate (161), and the first through hole (16) is not in communication with the accommodating space.

9. The damper according to claim 8, characterized in that, The rotor (2) includes: a rotor body (25) and an extension (26) connected to the rotor body (25); The first limiting protrusion (21) and the second limiting protrusion (22) are circumferentially arranged on the rotor body (25); The extension (26) extends into the accommodating space.

10. The damper according to claim 8 or 9, characterized in that, The rotor (2) has a second through hole (251) along the axial direction, and one end of the inner shell (15) is located in the second through hole (251); The inner shell (15) has a protrusion (31) on the surface opposite to the inner wall of the rotor (2), and the protrusion (31) is stepped; the inner wall of the second through hole (251) has a recess (32); a second sealing ring (33) is provided between the protrusion (31) and the recess (32).

11. A method for manufacturing a damper, characterized in that, The method, applied to the damper according to any one of claims 1 to 10, comprises: The rotor of the damper is obtained using a mold. The outer wall of the rotor has a first limiting protrusion and a second limiting protrusion arranged circumferentially. The first limiting protrusion and the second limiting protrusion are spaced apart in the axial direction of the rotor. A damper housing is obtained using a mold. The housing includes a housing end and a housing sidewall. The interior of the housing sidewall has a circumferentially arranged second groove. The rotor is placed in the accommodating space of the housing, and the second limiting protrusion is engaged in the second groove; The end of the housing is formed into a bent portion by a hot riveting process. The bent portion forms a first groove with the inside of the side wall of the housing, and the first limiting protrusion is located in the first groove.

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