Damper

Abstract

The utility model relates to the technical field of automobile parts, in particular to a damper. A damper comprises a shell and a rotor, a check ring is inwards formed at the bottom of the shell, a damping cavity is formed between the inner wall of the shell and the check ring, an end cover is arranged on the upper portion of the rotor, an annular rotating core is arranged on the lower portion of the rotor, the rotating core is coaxially installed in the damping cavity, and damping liquid is injected into a gap between the damping cavity and the rotating core. A circle of clamping groove is formed in the inner wall of the upper portion of the shell, a protruding ring is arranged on the outer wall of the upper portion of the rotor and clamped in the clamping groove, an inner ring face is arranged in the middle of the end cover, the bottom end of the inner ring face makes contact with the top end of the check ring, the clamping groove is in an arc shape, and the length of the inner wall of the check ring is larger than the diameter of the shell. The utility model has the benefits that the end cover is limited by the clamping groove, the bottom surface of the inner ring surface on the inner side and the top end of the check ring are contacted and supported during rotation, the inner step is higher than the sealing step, and the rotating core has large contact area and is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, and in particular to a damper. Background Art

[0002] The existing rotary damper used for the roof handle of the car or the like is generally installed on the rotating shaft of the handle. The general structure of this type of damper is composed of a shell with a cavity and a rotor arranged in the shell cavity, and the cavity is filled with damping fluid. There are various rotor structures of this type of damper. Most of them are two parts, the rotor and the shell. The rotor is clamped on the shell. Some of them have insufficient rotation support. There is also a problem that the damping becomes smaller and loses the damping function after repeated use. Summary of the invention

[0003] In order to solve the technical problems of insufficient rotation support and easy loss of damping function in the above-mentioned design, the utility model provides a damper.

[0004] The technical solution of the utility model is as follows:

[0005] A damper comprises a shell and a rotor, wherein a retaining ring is formed inwardly at the bottom of the shell, a damping cavity is arranged between the inner wall of the shell and the retaining ring, an end cover is arranged on the upper part of the rotor, and a ring-shaped rotating core is arranged at the lower part of the rotor. The rotating core is coaxially installed in the damping cavity, and a damping fluid is filled in the gap between the damping cavity and the rotating core. A damping hole connected with the inner cavity is arranged transversely on the rotating core, a circle of grooves is arranged on the inner wall of the upper part of the shell, a convex ring is arranged on the outer wall of the upper part of the rotor, and the convex ring is arranged on the groove, an inner ring surface is arranged in the middle of the end cover, the diameter of the inner ring surface is greater than the diameter of the inner wall of the retaining ring, the bottom end of the inner ring surface contacts the top end of the retaining ring, the groove is in an arc shape, a protrusion is arranged on the top of the end cover, and the diameter of the protrusion is consistent with that of the rotating core.

[0006] A sealing step is provided at the opening of the shell.

[0007] The number of the damping holes is two, which are arranged opposite to each other.

[0008] The outer wall of the upper part of the rotor is sleeved with a sealing ring a, which is sleeved on the concave ring of the rotating core, and the concave ring is below the end cover.

[0009] The outer wall at the top of the retaining ring is provided with a step, a sealing ring b is provided at the step, and two circles of recessed grooves a are provided at the lower part of the inner wall of the retaining ring. The height of the bottom surface of the step is higher than the height of the sealing step and the recessed circle.

[0010] The inner wall of the rotating core connected to the damping hole is concavely provided with a damping groove, and the number of the damping grooves is two.

[0011] A convex positioning block is axially arranged on the outer wall of the shell, and a notch is arranged in the middle of the positioning block.

[0012] The technical solution of the utility model has a novel structure and an ingenious and simple design. The structure is slender, the convex ring is clamped in the clamping groove, the clamping groove is arc-shaped, the end cover is limited by the clamping groove outside, the bottom end of the inner ring surface and the top end of the retaining ring are in contact and supported during rotation, the inner step is higher than the sealing step, the contact area of ​​the rotating core is large and more stable, the damping hole obtains uniform resistance due to the obstruction of the flow of the damping fluid, and the damping effect is long-lasting and the service life is long; the damping hole makes the damping groove of the rotating core also produce a damping effect with the damping oil, further making the resistance more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 , 3 It is a cross-sectional view of the utility model;

[0015] Figure 4 It is a structural schematic diagram of the housing of the utility model;

[0016] Figure 5 It is a structural schematic diagram of the rotor of the utility model. DETAILED DESCRIPTION

[0017] The utility model will be further described in conjunction with the accompanying drawings and embodiments. Example

[0018] like Figure 1 , 2 A damper shown in Figures 3, 4 and 5 comprises a shell 6 and a rotor 1, wherein a retaining ring 15 is formed inwardly at the bottom of the shell 6, a damping chamber 3 is provided between the inner wall of the shell 6 and the retaining ring 15, an end cover 7 is provided on the upper part of the rotor 1, a protrusion is provided on the top of the end cover 7 for engaging with the rotating shaft, an annular rotating core 4 is provided at the lower part of the rotor 1, the rotating core 4 is coaxially installed in the damping chamber 3, a damping fluid is injected into the gap between the damping chamber 3 and the rotating core 4, a damping hole 10 communicating with the inner chamber is transversely provided on the rotating core 4, a circle of grooves 16 is provided on the upper inner wall of the shell 6, a convex ring 14 is provided on the upper outer wall of the rotor, the convex ring 14 is clamped on the groove 16, an inner ring surface 9 is provided in the middle of the end cover 7, the diameter of the inner ring surface 9 is greater than the diameter of the inner wall of the retaining ring 15, the bottom end of the inner ring surface 9 contacts the top end 15 of the retaining ring, the groove 16 is arc-shaped, and the height of the inner wall of the retaining ring 15 is greater than the diameter of the shell 6. The diameters of the protrusion and the rotating core 4 are consistent, because compared with the commonly used structure, the rotating core 4 is longer. If they are not aligned with the same axis, the rotation is prone to jamming and is not smooth enough.

[0019] A sealing step 2 is provided at the opening of the housing 6 .

[0020] The number of the damping holes 10 is two, which are arranged opposite to each other.

[0021] The upper outer wall of the rotor 1 is sleeved with a sealing ring a8 , which is sleeved on the concave ring of the rotating core 4 , and the concave ring is below the end cover 7 .

[0022] The outer wall of the top of the retaining ring 15 is provided with a step, and a sealing ring b is provided at the step. The lower part of the inner wall of the retaining ring 15 is provided with two circles of recessed grooves a, and the height of the bottom surface of the step is higher than the height of the sealing step 2 and the recessed circle.

[0023] The inner wall of the rotating core 4 connected to the damping hole 10 is recessed with a damping groove 12, and the number of the damping grooves 12 is two.

[0024] A protruding positioning block 5 is axially arranged on the outer wall of the housing 6 , and a notch is arranged in the middle of the positioning block 5 .

[0025] When in use, the shell 6 is cylindrical, and a shaft hole 13 is opened in the center thereof, which is through from top to bottom, to accommodate the rotation of the external shaft. A side ring is provided on the top of the shell 6, which is higher than the surface of the end cover 7. The damping chamber 3 is annular, and the damping chamber 3 is coaxially arranged with the shaft hole 13. The bottom of the damping chamber 3 is sealed, and the upper end is open. A sealing ring a8 is provided at the top of the damping chamber 3 on the shell 6. The sealing ring a8 is on the sealing step 2 and the recessed ring to prevent the damping oil from leaking out. A section of convex positioning block 5 is provided on the outer wall of the shell 6 along the axial direction, and a notch is provided in the middle of the positioning block 5 to prevent the shell 6 from rotating. The ratio of the height to the diameter of the shell is relatively large, and it belongs to a fine Long version, the convex ring 14 is clamped in the clamping groove 16, the clamping groove 16 is arc-shaped, and has a certain extrusion space. The end cover is limited by the clamping groove 16. The bottom surface of the inner inner ring surface 9 and the top of the retaining ring 15 are in contact during rotation to provide support. The top of the retaining ring 15 is a smooth surface, and the outer side of the smooth surface is an arc surface. The inner step is higher than the sealing step. The contact area of ​​the rotating core 4 is large and more stable. The two damping holes 10 make the rotating core 4 obtain uniform resistance due to the obstruction of the flow of damping fluid during rotation, and the damping effect is long-lasting and the service life is long; the damping hole 10 makes the damping groove 12 of the rotating core 4 also produce a damping effect with the damping oil, further making the resistance more uniform.

[0026] It should be understood that the above description is only a preferred embodiment of the present invention and is not sufficient to limit the technical solution of the present invention. For ordinary technicians in this field, within the spirit and principles of the present invention, additions, substitutions, changes or improvements can be made according to the above description, and all these additions, substitutions, changes or improved technical solutions should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A damper, comprising a housing (6) and a rotor (1), characterized in that: The bottom of the shell (6) is formed with a retaining ring (15) inwardly, a damping chamber (3) is provided between the inner wall of the shell (6) and the retaining ring (15), the upper part of the rotor (1) is provided with an end cover (7), the lower part of the rotor (1) is a ring-shaped rotating core (4), the rotating core (4) is coaxially mounted in the damping chamber (3), the gap between the damping chamber (3) and the rotating core (4) is filled with damping fluid, the rotating core (4) is laterally provided with a damping hole (10) communicating with the inner chamber, and the shell (6) is provided with a damping hole (10) in communication with the inner chamber. The upper inner wall of the body (6) is provided with a circle of grooves (16), the upper outer wall of the rotor is provided with a convex ring (14), the convex ring (14) is clamped on the groove (16), an inner ring surface (9) is provided in the middle of the end cover (7), the diameter of the inner ring surface (9) is greater than the diameter of the inner wall of the retaining ring (15), the bottom end of the inner ring surface (9) is in contact with the top end of the retaining ring (15), the groove (16) is in an arc shape, and a protrusion is provided on the top of the end cover (7), and the diameter of the protrusion is consistent with that of the rotating core (4).

2. A damper according to claim 1, characterized in that: A sealing step (2) is provided at the opening of the shell (6).

3. A damper according to claim 1, characterized in that: The damping holes (10) are two in number and are arranged opposite to each other.

4. A damper according to claim 1, characterized in that: The upper outer wall of the rotor (1) is sleeved with a sealing ring a (8), which is sleeved on a recessed ring of the rotating core (4), and the recessed ring is below the end cover (7).

5. A damper according to claim 1, characterized in that: The outer wall of the top of the retaining ring (15) is provided with a step, and a sealing ring b is provided at the step. The lower part of the inner wall of the retaining ring (15) is provided with two circles of recessed grooves a, and the height of the bottom surface of the step is higher than the height of the sealing step (2) and the recessed circle.

6. A damper according to claim 1, characterized in that: A damping groove (12) is recessed on the inner wall of the rotating core (4) connected to the damping hole (10), and the number of the damping grooves (12) is two.

7. A damper according to claim 1, characterized in that: An outwardly protruding positioning block (5) is axially arranged on the outer wall of the housing (6), and a notch is arranged in the middle of the positioning block (5).

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