Rotary damper

Abstract

The utility model relates to the technical field of automobile parts, in particular to a rotary damper. The rotary 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 rotary core is arranged on the lower portion of the rotor, the rotary core is coaxially installed in the damping cavity, damping liquid is injected into a gap between the damping cavity and the rotary core, and the upper portion of the shell is sleeved with a ring sleeve. The end cover is sleeved with the ring sleeve, and the rotating core is provided with a damping hole communicated with the inner cavity. The connecting plate has the advantages that the structure is novel, the design is ingenious and simple, the ring sleeve is convenient to replace when damaged, the cost is low, the service life is prolonged, the sealing ring a prevents damping liquid from leaking outwards, the inner wall body and the protruding ring are further arranged above the sealing ring a to form secondary protection, the protection capacity is improved, the inner wall of the connecting plate is large in thickness, and the rotating supporting force is improved; due to the fact that flowing of damping liquid is blocked, uniform resistance is obtained, the damping effect is lasting, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a rotary 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 which are two parts, the rotor and the shell. The upper part of the rotor is more easily damaged than the shell, which affects the service life and benefits of the product. Summary of the invention

[0003] In order to solve the technical problem that the upper part of the rotor is more easily damaged and affects the service life of the product, the utility model provides a rotary damper.

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

[0005] The rotary 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 at 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 injected into the gap between the damping cavity and the rotating core. A collar is arranged at the upper part of the shell, and the collar is arranged on the end cover. The rotating core is provided with a damping hole connected with the inner cavity.

[0006] The trap is an annular body, with an inner wall body and an outer wall body at the bottom of the trap, a convex ring at the top of the shell, the convex ring is clamped between the inner wall body and the outer wall body, the bottom of the inner wall body contacts the surface of the rotating core, the inner wall of the trap contacts the outer wall of the end cover, and the outer wall at the lower part of the inner wall body and the lower part of the inner wall of the outer wall body are provided with inclined surfaces.

[0007] The end cover and the rotating core are annular bodies, and a connecting plate is arranged between the end cover and the rotating core. The diameter of the connecting plate is larger than the diameter of the rotating core, the diameter of the rotating core is larger than the diameter of the end cover, the inner wall thickness of the connecting plate is larger than the outer wall thickness, and a sealing ring a is arranged under the connecting plate.

[0008] A damping groove is provided in the vertical direction where the damping hole is located. The damping grooves are symmetrically arranged, and the number of the damping holes is two.

[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 a damping surface is provided on the outer wall protrusion below the step. The number of the damping surfaces is three, and there are intervals between the damping surfaces, which are evenly distributed.

[0010] The upper part of the end cover is provided with protrusions on both sides, and a gap is provided between the protrusions.

[0011] The lower part of the inner wall of the retaining ring is provided with an inclined surface.

[0012] The technical solution of the utility model has a novel structure, ingenious and simple design, easy replacement of the snare when damaged, low cost, and extended service life. The sealing ring a prevents the damping fluid from leaking out, and the inner wall body and the convex ring on the upper side form secondary protection to improve the protection capability. The thick inner wall of the connecting plate improves the rotation support force. The damping holes and the damping grooves obtain uniform resistance due to the obstruction of the flow of the damping fluid, and the damping effect is lasting and the service life is long. The damping hole enables the damping surface of the rotating core to 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 , 5 It is a structural schematic diagram of the housing of the utility model;

[0016] Figure 6 It is a structural schematic diagram of the utility model snare;

[0017] Figure 7 It is a schematic diagram of the structure of the rotor of the utility model;

[0018] Figure 8 It is a structural schematic diagram of embodiment 2 of the present utility model. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments. Example

[0020] like Figure 1 , 2 The rotary damper shown in , 3, 4, 5, 6, and 7 comprises a shell 6 and a rotor 1. 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. The lower part of the rotor 1 is a ring-shaped rotating core 4. The rotating core 4 is coaxially installed in the damping chamber 3. The gap between the damping chamber 3 and the rotating core 4 is filled with damping fluid. A snare 9 is provided on the upper part of the shell 6. The snare 9 is provided on the end cover 7. The rotating core 4 is provided with a damping hole 10 connected with the inner chamber.

[0021] The trap 9 is an annular body, and an inner wall body and an outer wall body are provided at the bottom of the trap 9. A circle of convex rings 16 are provided on the top of the shell 6. The convex rings 16 are clamped between the inner wall body and the outer wall body. The bottom of the inner wall body contacts the surface of the rotating core 4, and the inner wall of the trap 9 contacts the outer wall of the end cover 7. The outer wall of the lower part of the inner wall body and the lower part of the inner wall body are provided with inclined surfaces.

[0022] The end cover 7 and the rotating core 4 are annular bodies, and a connecting plate 11 is provided between the end cover 7 and the rotating core 4. The diameter of the connecting plate 11 is larger than the diameter of the rotating core 4, and the diameter of the rotating core 4 is larger than the diameter of the end cover 7. The inner wall thickness of the connecting plate 11 is larger than the thickness of the outer wall, and a sealing ring a8 is provided under the connecting plate 11.

[0023] A damping groove 12 is provided in the vertical direction where the damping hole 10 is located. The damping grooves 12 are symmetrically arranged, and the number of the damping holes 10 is two.

[0024] 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 outer wall below the step is convexly provided with a damping surface 13. The number of the damping surfaces 13 is three, and the damping surfaces 13 are spaced apart and evenly distributed.

[0025] The end cover 7 is provided with protrusions 2 on both sides of the upper part, and a notch 14 is provided between the protrusions 2 .

[0026] The lower part of the inner wall of the retaining ring 15 is provided with an inclined surface.

[0027] When in use, the shell 6 is cylindrical, and a shaft hole 13 is opened in the center to adapt to the rotation of the external shaft. 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 snare 9 coaxial with the shaft hole 13 is provided at the top of the shell 6. Some damper rotors are designed as one piece, and the upper part is completely replaced if it is lost. The structure is designed as a split body, and the inner wall of the snare 9 forms a secondary protection. The lower part of the connecting plate 11 is used to clamp the sealing ring a8 to prevent the damping oil from leaking out. The inner wall There is also a ring body inside the body, which is in close contact with the end cover 7. The shell 6 is not provided with a circle of inner grooves like some dampers, so the overall processing is more convenient. A convex positioning block 5 is axially arranged on the outer wall of the shell 6 to prevent the shell 6 from rotating. There are four damping holes 10 and damping grooves 12, which makes 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 surface 13 of the rotating core 4 also produce a damping effect with the damping oil, further making the resistance more uniform. Example

[0028] like Figure 8 As shown, the difference between this embodiment and embodiment 1 is that arc-shaped protrusions are provided on both sides of the upper part of the end cover 7, a gap b is provided between the arc-shaped protrusions, the inner side of the arc-shaped protrusion is arc-shaped, and the length of the arc-shaped protrusion is greater than the protrusion length.

[0029] 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 rotary damper comprising a housing (6) and a rotor (1), characterized in that: 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 at the upper part of the rotor (1), a ring-shaped rotating core (4) is provided at the lower part of the rotor (1), the rotating core (4) is coaxially mounted in the damping chamber (3), a damping fluid is injected into the gap between the damping chamber (3) and the rotating core (4), a collar (9) is sleeved on the upper part of the shell (6), the collar (9) is sleeved on the end cover (7), and the rotating core (4) is provided with a damping hole (10) communicating with the inner chamber.

2. The rotary damper according to claim 1, characterized in that: The trap (9) is an annular body. An inner wall body and an outer wall body are provided at the bottom of the trap (9). A convex ring (16) is provided at the top of the shell (6). The convex ring (16) is clamped between the inner wall body and the outer wall body. The bottom of the inner wall body contacts the surface of the rotating core (4). The inner wall of the trap (9) contacts the outer wall of the end cover (7). The lower outer wall of the inner wall body and the lower inner wall of the outer wall body are provided with inclined surfaces.

3. The rotary damper according to claim 1, characterized in that: The end cover (7) and the rotating core (4) are annular bodies, a connecting plate (11) is provided between the end cover (7) and the rotating core (4), the diameter of the connecting plate (11) is greater than the diameter of the rotating core (4), the diameter of the rotating core (4) is greater than the diameter of the end cover (7), the thickness of the inner wall of the connecting plate (11) is greater than the thickness of the outer wall, and a sealing ring a (8) is provided below the connecting plate (11).

4. The rotary damper according to claim 1, characterized in that: A damping groove (12) is provided in the vertical direction where the damping hole (10) is located. The damping grooves (12) are symmetrically arranged, and the number of the damping holes (10) is two.

5. The rotary damper according to claim 1, characterized in that: The outer wall at the top of the retaining ring (15) is provided with a step, a sealing ring b is provided at the step, and a damping surface (13) is provided on the outer wall protrusion below the step. The number of the damping surfaces (13) is three, and the damping surfaces (13) are spaced apart and evenly distributed.

6. The rotary damper according to claim 1, characterized in that: The upper part of the end cover (7) is provided with protrusions (2) on both sides, and a notch a (14) is provided between the protrusions (2).

7. The rotary damper according to claim 1, characterized in that: The lower portion of the inner wall of the retaining ring (15) is provided with an inclined surface.

8. The rotary damper according to claim 1, characterized in that: Arc-shaped protrusions are provided on both sides of the upper part of the end cover (7), a notch b is provided between the arc-shaped protrusions, and the inner sides of the arc-shaped protrusions are in an arc shape.

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