Rotating shaft assembly of damper and damper
By using a necking process at the opening of the damper's housing to form a limiting flange that engages with the pressure ring, the complexity and instability of traditional fixing methods are solved. This achieves stable fixing of axial movement and simplifies manufacturing, thereby improving product stability and lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional damper shaft fixing methods suffer from complex welding processes, thermal deformation affecting accuracy and reliability, high cost of threaded connections and easy loosening, resulting in unstable performance and short service life.
A narrowing process is used to form a limiting flange at the opening of the shaft housing, which engages with the pressure ring. The axial movement of the shaft core is fixed by narrowing, which simplifies the design and improves stability.
It achieves stable fixation of axial movement, simplifies the manufacturing process, improves production qualification rate and product stability, extends service life, and reduces manufacturing costs.
Smart Images
Figure CN224039081U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to damper field especially relates to a damper's pivot subassembly and damper. BACKGROUND
[0002] Damper is a common speed control device, usually used for toilet cover, through the control toilet cover's closing speed, makes it can smoothly fall. Damper core function realizes the accurate fixing and stable movement of pivot. However, the traditional damper has many deficiencies in pivot fixing mode, which seriously limits its performance improvement and application expansion.
[0003] The traditional damper usually adopts gland welding or thread fastening to fix the axial movement of the pivot. Although the gland welding can provide strong fixing effect, the welding process is complex, and thermal deformation is easy to occur during the welding process, which affects the overall precision and reliability of the damper.
[0004] The thread fastening fixing mode is to fix the pivot in the damper shell through thread connection. The thread processing process is complex and requires high precision, which significantly increases the manufacturing cost. In addition, the thread connection has the risk of thread loosening during long-term use. Once the thread loosens, the fixing effect of the pivot will be greatly reduced, and even the axial movement of the pivot may occur, which seriously affects the performance and service life of the damper. SUMMARY
[0005] In order to solve the problems of the above-mentioned traditional fixing mode, the utility model provides a pivot subassembly of damper, which realizes sealing by necking process to fix the axial movement of the pivot, has simple structure, good stability and low cost.
[0006] In order to solve the above-mentioned technical problems, the utility model provides a pivot subassembly of damper, which includes shaft shell, shaft core and pressure ring. The shaft shell includes an opening, the shaft core is inserted into the shaft shell through the opening, and the shaft core is rotatable relative to the shaft shell. The opening has a limiting flange formed by necking, which protrudes inward.
[0007] The pressure ring is sleeved on the shaft core, and the pressure ring is located below the opening after the shaft core is inserted into the shaft shell. After the opening is necked, the limiting flange and the pressure ring form axial limiting to fix the shaft core in the shaft shell along the axial direction.
[0008] In a preferred embodiment, at least one necking deformation guide step is arranged on the inner wall of the shaft shell, and the position of the necking deformation guide step is close to the opening.
[0009] In a preferred embodiment, the inner wall of the shaft housing is further provided with a first step and a second step, and the constriction deformation guide step, the first step, and the second step are sequentially arranged along the insertion direction of the shaft core;
[0010] When the shaft core is inserted into the shaft housing, the pressure ring is engaged on the first step, and the shaft core includes a convex ring, which is engaged on the second step.
[0011] In a preferred embodiment, the shaft core is provided with a first groove corresponding to the position of the pressure ring, the first groove is provided with a first sealing ring, and the first sealing ring is in close contact with the inner wall of the pressure ring;
[0012] The pressure ring includes a second groove, in which a second sealing ring is built-in, and the second sealing ring is tightly fitted with the inner wall of the shaft housing.
[0013] In a preferred embodiment, the pressure ring is provided with a pressure platform, which faces the opening; the pressure platform and the limiting flange form an axial limiting fit.
[0014] In a preferred embodiment, the pressure table includes a pressure surface that mates with the limiting flange, and the pressure surface is an arc-shaped structure with the arc surface facing upward.
[0015] In a preferred embodiment, the shaft housing has a built-in positioning hole, and the bottom of the shaft core is provided with a positioning post. When the shaft core is inserted into the shaft housing, the positioning post is inserted into the positioning hole.
[0016] In a preferred embodiment, the shaft housing is made of metal.
[0017] This utility model also provides a damper, including the aforementioned rotating shaft assembly and blades. The blades are installed inside the shaft housing and are in contact with the inner wall of the shaft housing. The rotation of the shaft core drives the blades to rotate along the inner wall of the shaft housing.
[0018] The shaft core includes an oil-blocking rib that mates with the blade; the blade has a slot, and the oil-blocking rib is placed inside the slot;
[0019] When the shaft rotates, the oil baffle rib and the groove are fitted together with a clearance to form an oil passage.
[0020] In a preferred embodiment, the blade is provided with oil-passing notches on both sides along the length direction of the groove, and the shaft also includes an oil-passing groove, both of which can pass oil.
[0021] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:
[0022] 1. The necking process is used to seal the installation opening of the shaft shell, thereby fixing the axial movement of the shaft core, without complex mechanical structure or additional fixing device, simplifying the product design and manufacturing process.
[0023] 2. The necking deformation guide step is arranged on the inner wall of the shaft shell, the first step and the second step are used for assembly, the accuracy and stability of the necking process are ensured, and the function instability caused by pressure or machine stroke problem is avoided. Meanwhile, the cooperation of the pressing ring and the limiting flange further enhances the stability of the axial fixation of the shaft core.
[0024] 3. The necking deformation guide step is arranged on the inner wall of the shaft shell, so that the necking process can better deform according to the required shape, greatly improving the stability of the necking of the product, thereby improving the production qualified rate of the product. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is the overall exploded view of the damper in the preferred embodiment of the utility model;
[0026] Figure 2 It is the overall sectional view of the damper in the preferred embodiment of the utility model;
[0027] Figure 3 It is the necking structure schematic diagram of the shaft shell in the preferred embodiment of the utility model;
[0028] Figure 4 It is the internal structure schematic diagram of the shaft shell in the preferred embodiment of the utility model;
[0029] Figure 5 It is the structure schematic diagram of the shaft shell before necking in the preferred embodiment of the utility model;
[0030] Figure 6 It is the structure schematic diagram of the pressing ring in the preferred embodiment of the utility model;
[0031] Figure 7 It is the structure schematic diagram of the end face of the pressing ring in the preferred embodiment of the utility model;
[0032] Figure 8 It is the structure diagram of the shaft core oil passing groove and oil blocking rib in the preferred embodiment of the utility model;
[0033] Figure 9 It is the structure diagram of the shaft core positioning column in the preferred embodiment of the utility model;
[0034] Figure 10 It is the structure diagram of the blade in the preferred embodiment of the utility model;
[0035] Figure 11 It is the structure diagram of the oil passing channel of the blade in the preferred embodiment of the utility model;
[0036] Figure 12Practical new type preferred embodiment damper closing, opening over oil schematic diagram.
[0037] Marked for explanation: 1, shaft shell; 11, opening; 12, positioning hole; 13, limiting flange; 14, necking deformation guide step; 15, first step; 16, second step; 2, shaft core; 21, positioning column; 22, convex ring; 23, first groove; 24, oil blocking rib; 25, oil passing groove; 3, press ring; 31, pressing table; 32, pressing surface; 33, second groove; 4, first sealing ring; 5, second sealing ring; 6, blade; 61, notch; 62, oil passing gap; 63, oil blocking surface; 64, oil scraping surface. DETAILED DESCRIPTION
[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments, based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.
[0039] In the description of the present application, it should be pointed out that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0040] In the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be wall-mounted connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication between two elements, for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0041] Reference Figures 1-12 The present embodiment provides a damper shaft assembly, comprising a shaft shell 1, a shaft core 2 and a press ring 3, the shaft shell 1 comprises an opening 11 for inserting the shaft core 2, the shaft core 2 is inserted into the shaft shell 1 through the opening 11, the shaft shell 1 is provided with a positioning hole 12 (such as Figure 4 ) inside, the bottom of the shaft core 2 is provided with a positioning column 21 (such asFigure 9 When the shaft core 2 is inserted into the shaft shell 1, the positioning column 21 is inserted into the positioning hole 12, and the shaft core 2 can rotate relative to the shaft shell 1.
[0042] As Figure 2 , the opening 11 has a limiting flange 13 formed by necking, which protrudes inward; the compression ring 3 is sleeved on the shaft core 2, and after the shaft core 2 is inserted into the shaft shell 1, the compression ring 3 is located below the opening 11, and after the opening 11 is necked, the limiting flange 13 and the compression ring 3 form axial limiting to fix the shaft core 2 in the shaft shell 1 in the axial direction.
[0043] As Figure 3 , after the necking process of the opening 11, the limiting flange 13 and the compression ring 3 form axial limiting, the limiting flange 13 presses the compression ring 3 to prevent the compression ring 3 from being axially removed, thereby fixing the axial movement of the shaft core 2, and the necking process realizes sealing and axial limiting, without complex mechanical structure or additional fixing device, simplifying product design and manufacturing process.
[0044] Specifically, the compression ring 3 is provided with a pressing table 31 (as Figure 6 ), which faces the opening 11; the pressing table 31 and the limiting flange 13 form axial limiting cooperation, and the design of the pressing table 31 can effectively prevent the compression ring 3 from moving in the axial direction, ensuring that the shaft core 2 maintains a stable axial position in the shaft shell 1. The pressing table 31 includes a pressing surface 32 (as Figure 2 ) cooperating with the limiting flange 13, the pressing surface 32 is an arc surface upward arc structure, and the design of the arc pressing surface 32 makes the cooperation between the compression ring 3 and the limiting flange 13 more smooth. Under the action of axial force, the arc structure can uniformly disperse stress, avoiding stress concentration phenomenon, thereby improving the structural strength and durability of the pressing table 31 and the limiting flange 13, and prolonging the service life of the product.
[0045] In this embodiment, the shaft shell 1 is made of metal or metal-like material, and at least one necking deformation guide step 14 (as Figure 5 ) is arranged on the inner wall of the shaft shell 1. The necking deformation guide step 14 is located close to the opening 11. The design of the necking deformation guide step 14 on the inner wall of the shaft shell 1 enables the necking process to better deform according to the required shape, greatly improving the stability of product necking, thereby improving the production qualification rate of the product.
[0046] The inner wall of the shaft shell 1 is also provided with a first step 15 and a second step 16 (as Figure 5), the necking deformation guide step 14, the first step 15, and the second step 16 are sequentially arranged along the insertion direction of the shaft core 2; when the shaft core 2 is inserted into the shaft shell 1, the compression ring 3 is clamped on the first step 15, and the shaft core 2 comprises a convex ring 22 (as shown in Figure 8 ), the convex ring 22 is clamped on the second step 16.
[0047] As Figure 3 , the first step 15 and the second step 16 are assembly steps, through the arrangement of the assembly steps, when the shaft shell 1 is necked, the compression ring 3 cannot press the shaft core 2 to cause the problem of instability of rotation or function caused by too large pressure or machine overstroke work. The design can reduce the precision requirement of the necking process, and increase the function stability of the product.
[0048] As Figure 2 , in order to ensure good sealing performance, the shaft core 2 is provided with a first groove 23 corresponding to the position of the compression ring 3, the first groove 23 is internally provided with a first sealing ring 4, and the first sealing ring 4 is tightly matched with the inner wall of the compression ring 3; the compression ring 3 comprises a second groove 33 (as shown in Figure 7 ), the second groove 33 is internally provided with a second sealing ring 5, and the second sealing ring 5 is tightly matched with the inner wall of the shaft shell 1. Liquid leakage is effectively prevented, and the sealing performance and service life of the damper are improved.
[0049] The shaft assembly provided by the embodiment is used for a damper, as Figure 1 , the specific assembly structure is that the damper comprises the shaft assembly and a vane 6, the vane 6 is installed in the shaft shell 1, the vane 6 is attached to the inner wall of the shaft shell 1, and the shaft core 2 drives the vane 6 to rotate along the inner wall of the shaft shell 1; the shaft core 2 comprises an oil blocking rib 24 (as shown in Figure 8 ) matched with the vane 6; the vane 6 is provided with a notch 61 (as shown in Figure 10 ), and the oil blocking rib 24 is arranged in the notch 61; when the shaft core 2 rotates, the oil blocking rib 24 is gap matched with the notch 61 to form an oil passing channel (as shown in Figure 12 ).
[0050] The vane 6 is provided with an oil passing gap 62 on both sides along the length direction of the notch 61, and the shaft core 2 further comprises an oil passing groove 25, and the oil passing gap 62 and the oil passing groove 25 can pass oil. One side of the notch 61 along the length direction is provided with an oil sealing surface 63 and an oil scraping surface 64, the oil sealing surface 63 is arranged on the inner side of the groove, and the oil scraping surface 64 is arranged on the outer side of the groove (as shown in Figure 11 ).
[0051] As Figure 12The working principle of the damper is as follows: during rotation (including opening and closing), in the opening process, the shaft core 2 rotates, the gap between the notch 61 of the blade 6 and the oil blocking rib 24 is matched to form an oil passing channel, the damping oil flows through, and the synchronous damping oil also flows through the oil passing groove 25 of the shaft core 2 to quickly pass through the oil. In the closing process, the shaft core 2 rotates, the notch 61 of the blade 6 rotates relative to the oil blocking rib 24 to close the gap, and the blade 6 does not pass through the oil. During the working process of the rotary damper, the damping oil can pass through the oil passing groove 25 of the shaft core 2 in addition to passing through the blade 6, and the oil passing groove 25 is in the oil passing state during the opening and closing processes.
[0052] The above merely describes a preferred specific embodiment of the present application, but the design concept of the present application is not limited to this. Any skilled person in the art can make non-essential changes to the present application within the technical scope disclosed by the present application, and such changes shall be deemed to fall within the protection scope of the present application.
Claims
1. A rotating shaft assembly of a damper, characterized by: The shaft assembly comprises a shaft shell, a shaft core and a compression ring, the shaft shell comprises an opening, the shaft core is inserted into the shaft shell through the opening, and the shaft core is rotatable relative to the shaft shell; a limiting flange is formed by necking the opening, and the limiting flange protrudes inward; The compression ring is sleeved on the shaft core, the compression ring is located below the opening after the shaft core is inserted into the shaft shell, and the limiting flange and the compression ring form axial limiting after the opening is necked, so that the shaft core is fixed in the shaft shell in the axial direction.
2. The rotating shaft assembly of a damper according to claim 1, wherein: At least one necking deformation guide step is arranged on the inner wall of the shaft shell, and the necking deformation guide step is located close to the opening.
3. A rotating shaft assembly of a damper according to claim 2, wherein: The inner wall of the shaft shell is further provided with a first step and a second step, and the necking deformation guide step, the first step and the second step are sequentially arranged in the insertion direction of the shaft core. When the shaft core is inserted into the shaft shell, the compression ring is clamped on the first step, the shaft core comprises a protruding ring, and the protruding ring is clamped on the second step.
4. The rotating shaft assembly of a damper according to claim 3, wherein: The shaft core is provided with a first groove corresponding to the position of the compression ring, a first sealing ring is arranged in the first groove, and the first sealing ring is tightly matched with the inner wall of the compression ring; The compression ring comprises a second groove, a second sealing ring is arranged in the second groove, and the second sealing ring is tightly matched with the inner wall of the shaft shell.
5. The rotating shaft assembly of a damper according to claim 1, wherein: The compression ring is provided with a pressing table, and the pressing table faces the opening; the pressing table and the limiting flange form axial limiting cooperation.
6. A rotating shaft assembly of a damper according to claim 5, wherein: The pressing table comprises a pressing surface matched with the limiting flange, and the pressing surface is an arc surface with an upward arc structure.
7. The rotating shaft assembly of a damper according to claim 1, wherein: The shaft shell is provided with a positioning hole, and the bottom of the shaft core is provided with a positioning column; when the shaft core is inserted into the shaft shell, the positioning column is inserted into the positioning hole.
8. The rotating shaft assembly of a damper according to claim 1, wherein: The shaft shell is made of metal.
9. A damper characterized by: The shaft assembly comprises a shaft shell, a shaft core and a compression ring, the shaft shell comprises an opening, the shaft core is inserted into the shaft shell through the opening, and the shaft core is rotatable relative to the shaft shell; a limiting flange is formed by necking the opening, and the limiting flange protrudes inward; The compression ring is sleeved on the shaft core, the compression ring is located below the opening after the shaft core is inserted into the shaft shell, and the limiting flange and the compression ring form axial limiting after the opening is necked, so that the shaft core is fixed in the shaft shell in the axial direction. The shaft shell is provided with at least one necking deformation guide step on the inner wall, and the necking deformation guide step is located close to the opening.
10. A damper according to claim 9, wherein: The inner wall of the shaft shell is further provided with a first step and a second step, and the necking deformation guide step, the first step and the second step are sequentially arranged in the insertion direction of the shaft core. When the shaft core is inserted into the shaft shell, the compression ring is clamped on the first step, the shaft core comprises a protruding ring, and the protruding ring is clamped on the second step. The shaft core is provided with a first groove corresponding to the position of the compression ring, a first sealing ring is arranged in the first groove, and the first sealing ring is tightly matched with the inner wall of the compression ring; The compression ring comprises a second groove, a second sealing ring is arranged in the second groove, and the second sealing ring is tightly matched with the inner wall of the shaft shell. The compression ring is provided with a pressing table, and the pressing table faces the opening; the pressing table and the limiting flange form axial limiting cooperation. The pressing table comprises a pressing surface matched with the limiting flange, and the pressing surface is an arc surface with an upward arc structure. The shaft shell is provided with a positioning hole, and the bottom of the shaft core is provided with a positioning column; when the shaft core is inserted into the shaft shell, the positioning column is inserted into the positioning hole. The shaft shell is made of metal. The shaft assembly comprises a shaft shell, a shaft core and a compression ring, the shaft shell comprises an opening, the shaft core is inserted into the shaft shell through the opening, and the shaft core is rotatable relative to the shaft shell; a limiting flange is formed by necking the opening, and the limiting flange protrudes inward; The compression ring is sleeved on the shaft core, the compression ring is located below the opening after the shaft core is inserted into the shaft shell, and the limiting flange and the compression ring form axial limiting after the opening is necked, so that the shaft core is fixed in the shaft shell in the axial direction. The shaft shell is provided with at least one necking deformation guide step on the inner wall, and the necking deformation guide step is located close to the opening. The inner wall of the shaft shell is further provided with a first step and a second step, and the necking deformation guide step, the first step and the second step are sequentially arranged in the insertion direction of the shaft core. When the shaft core is inserted into the shaft shell, the compression ring is clamped on the first step, the shaft core comprises a protruding ring, and the protruding ring is clamped on the second step. The shaft core is provided with a first groove corresponding to the position of the compression ring, a first sealing ring is arranged in the first groove, and the first sealing ring is tightly matched with the inner wall of the compression ring; The compression ring comprises a second groove, a second sealing ring is arranged in the second groove, and the second sealing ring is tightly matched with the inner wall of the shaft shell. The compression ring is provided with a pressing table, and the pressing table faces the opening; the pressing table and the limiting flange form axial limiting cooperation. The pressing table comprises a pressing surface matched with the limiting flange, and the pressing surface is an arc surface with an upward arc structure. The shaft shell is provided with a positioning hole, and the bottom of the shaft core is provided with a positioning column; when the shaft core is inserted into the shaft shell, the positioning column is inserted into the positioning hole. The shaft shell is made of metal. The shaft assembly comprises a shaft shell, a shaft core and a compression ring, the shaft shell comprises an opening, the shaft core is inserted into the shaft shell through the opening, and the shaft core is rotatable relative to the shaft shell; a limiting flange is formed by necking the opening, and the limiting flange protrudes inward;