Cylinder type damper

Abstract

The utility model relates to the field of dampers, in particular to a barrel type damper. The barrel type damper comprises a shell and a rotor sleeved with the shell. A trapezoidal slope step is arranged on the rotor, a clamping groove matched with the trapezoidal slope step is formed in the shell, a spiral groove is formed in the inner wall of the shell, a through hole is formed in the rotor, the width of the spiral groove is equal to that of the through hole, a sealing ring is arranged in the groove below the slope step, and the crest of the spiral groove is located below the groove. And compared with a traditional triangular slope step, the trapezoidal slope step has obvious advantages. The wide-pitch spiral groove pushes the damping liquid when the rotor rotates reversely, the damping liquid is prevented from overflowing, the wide-pitch spiral groove is matched with the through hole to ensure smooth flowing and uniform distribution of the damping liquid, and the damping force can be adjusted. The sealing ring and the multiple layers of steps effectively prevent the damping liquid from leaking, and the sealing performance is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to damper field, concretely relates to cylinder damper. BACKGROUND

[0002] As a kind of device that can provide movement resistance, dissipate movement energy, damper has wide application in many fields.Cylinder damper mainly includes shell and rotor assembly that is sleeved in shell, rotor in rotor assembly is arranged, and rotating shaft is rotated in shell.And existing damper such as the cylinder damper with publication No.CN 212272905 U, including shell and rotating shaft that is sleeved in shell, the shell includes inner tube and outer tube, the rotating shaft center position is penetrated and is provided with through-hole, the outer surface of rotating shaft is equipped with inclined surface step, the section of inclined surface step is protruding triangle, the inner surface of outer tube is equipped with the clamping groove that is mutually clamped and connected with inclined surface step, the outer wall of outer tube and rotating shaft constitutes a damping cavity filled with damping oil, the inner wall of inner tube and rotating shaft constitutes a second damping cavity filled with damping oil.Among them, the force distribution of triangle-shaped inclined surface step triangle is more concentrated in apex and hypotenuse under the bearing torque.Under the action of the same torque, the pressure distribution of the contact part of triangle step and clamping groove is uneven, which may cause local wear of clamping groove, and further affect the stability of friction, so that relative sliding is more likely to occur.And when rotating shaft is high-speed operation, damping cavity pressure is too large, and due to the action of centrifugal force, damping liquid will overflow upwards, even if sealed, it may also overflow in a long time. SUMMARY

[0003] The utility model aims at overcoming the problem that damping liquid is easy to overflow in existing cylinder damper.

[0004] To achieve the above object, the technical idea adopted by the utility model for solving its technical problems is that, to solve the above problems, the triangular inclined surface step is replaced by isosceles trapezoid in the present application, the trapezoid has two parallel bottom edges, the long bottom edge can provide stable support, and the friction generated by the long bottom edge and inclined edge of trapezoid and the self-locking property of structure can better resist relative sliding.

[0005] Spiral groove is arranged on the inner wall of shell, the spiral groove has wide pitch, when rotor rotates against spiral thread, spiral thread will have downward pushing force on damping liquid, to slow down the overflow of damping liquid.The diameter of oil outlet is set to be equal to the groove width of spiral groove, when damping liquid flows in through-hole, it can rotate more along spiral groove, to avoid the throttling effect caused by groove width change, and to avoid the problem of uneven damping distribution.

[0006] To achieve the above object, the technical solution adopted by the utility model for solving its technical problems is that:

[0007] The utility model designs a cylinder damper, and the specific scheme is as follows:

[0008] The cylinder damper comprises a shell and a rotor, characterized in that the rotor is sleeved in the shell; the inner wall of the shell is provided with a spiral groove; and the upper end of the rotor is provided with a trapezoidal inclined surface step.

[0009] Further, the inner surface of the shell is provided with a clamping groove matched with the inclined surface step.

[0010] Further, the rotor is provided with a through hole.

[0011] Further, the spiral groove has a groove width equal to the through hole.

[0012] Further, the spiral groove tooth top is arranged below the groove.

[0013] Further, the spiral groove tooth top is arranged below the groove.

[0014] The utility model has the beneficial effects that:

[0015] 1. The trapezoidal inclined surface step long bottom edge of the utility model is used for clamping and stabilizing support, force is uniformly distributed, and the clamping groove is tightly matched to prevent the rotor from sliding and improve stability.

[0016] 2. The wide-pitch spiral groove of the utility model pushes the damping liquid in reverse rotation, the groove width is equal to the through hole to avoid throttling, the damping liquid flows smoothly and uniformly, and is not easy to overflow. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a vertical section structure schematic view of the utility model;

[0018] Figure 2 It is an exploded structure schematic view of the utility model;

[0019] Figure 3 It is a shell part perspective detail schematic view;

[0020] Figure 4 It is a front view of the utility model;

[0021] Among them, the above-mentioned drawing includes the following figure marks:

[0022] 10, shell; 11, spiral groove; 12, clamping groove; 13, rotating shaft; 20, rotor; 21, inclined surface step; 22, through hole; 23, section; 30, groove; 31, sealing ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments, not all the embodiments.

[0024] In the description of the utility model, it needs to be understood that the terms "front", "back", "left", "right", "up", "down", "top", "bottom", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] Reference Figures 1-4 The utility model provides cylinder damper is improved on the basis of existing cylinder damper, this cylinder damper is mainly by shell 10 and rotor 20 constitute, rotor 20 is sleeved in shell 10, and rotates in shell 10. Two cut surfaces 23 are arranged on the rotor 20, the through hole 22 is arranged on the cut surface 23, the inner wall of shell 10 is provided with spiral groove 11, and the upper end of rotor 20 is provided with trapezoidal inclined surface step 21. The inner surface of shell 10 is also provided with clamping groove 12 matched with inclined surface step 21. The inclined surface step 21 below is provided with groove 30, and the sealing ring 31 is arranged in the groove 30, and the tooth top of spiral groove 11 is arranged below the groove 30.

[0026] In specific implementation, the top of shell 10 is provided with a flange to prevent the rotor 20 from falling out, and its structure is similar to the cylinder damper with publication number CN221591609U,

[0027] In specific implementation, the design of trapezoidal inclined surface step 21 aims to optimize stress distribution and improve stability. The long bottom edge is parallel to the short bottom edge, and the long bottom edge can provide more stable support. Compared with the original triangular inclined surface step, when torque is borne, force can be more evenly distributed on the long bottom edge and the inclined edge. When the rotor 20 rotates, the friction force generated by the long bottom edge and the inclined edge of the trapezoid and the self-locking property of the structure can better resist relative sliding. The clamping groove 12 is tightly matched with the inclined surface step 21, so that the rotor 20 can stably rotate in the shell 10, and at the same time, good sealing performance is maintained to prevent the damping liquid from leaking from the matching part.

[0028] In actual implementation, the helical groove 11 on the inner wall of the shell 10 has a wide pitch, and when the rotor 20 rotates in the reverse direction of the helical thread, the helical thread will generate a downward pushing force on the damping liquid. This design can effectively slow down the upward overflow trend of the damping liquid due to centrifugal force and other factors. The groove width of the helical groove 11 is equal to the diameter of the through hole 22, and when the damping liquid flows through the through hole 22, it can rotate more along the helical groove 11, avoiding the throttling effect caused by the change of the groove width, thereby preventing the problem of uneven damping distribution. When the rotor 20 rotates in the shell 10, the damping liquid will flow along the helical groove 11 due to the existence of the helical groove 11. In this process, there is relative motion between the damping liquid and the groove wall of the helical groove 11, thereby generating a shear force.

[0029] The tooth crest of the helical groove 11 is arranged below the groove 30, and such a positional relationship can ensure that the tooth crest of the helical groove 11 does not interfere with the sealing performance of the sealing ring 31 during the rotation of the rotor 20 and the flow of the damping liquid, and also does not affect the normal flow of the damping liquid in the groove of the helical groove 11. During processing and assembly, the relative position accuracy of the tooth crest of the helical groove 11 and the groove 30 needs to be strictly controlled to ensure that the cooperation between the components meets the design requirements and guarantees the overall performance and reliability of the damper.

[0030] In actual application, the speed gradient can be changed by adjusting the parameters (such as pitch, groove depth, groove width, etc.) of the helical thread, thereby adjusting the shear force and damping force. For example, reducing the pitch will make the damping liquid experience more rotation in the unit length of the helical groove, increase the speed gradient, and thus increase the shear force and damping force, which is suitable for instruments with high rotation speed.

[0031] In actual implementation, the groove 30 is located below the inclined step 21 to provide installation space for the sealing ring 31. The sealing ring 31 is installed in the groove 30 in an interference fit to ensure that the leakage of the damping liquid from between the inclined step 21 and the shell 10 can be effectively prevented during the rotation of the rotor 20. The material of the sealing ring can be selected from wear-resistant and high-temperature-resistant rubber materials, such as nitrile rubber or fluororubber, to ensure that it maintains good sealing performance during long-term use.

[0032] A plurality of steps are arranged below the sealing ring 31, and preferably a plurality of steps are symmetrically arranged on the left and right sides. Through such cooperation, the impact force generated by the rotation of the damping liquid in the shell 10 is reduced.

[0033] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cylinder damper comprising a housing (10) and a rotor (20), characterized in that: The rotor (20) is sleeved in the shell (10); the inner wall of the shell (10) is provided with a spiral groove (11); the upper end of the rotor (20) is provided with a trapezoidal inclined step (21).

2. The cartridge damper of claim 1, wherein, The inner surface of the shell (10) is provided with a clamping groove (12) matched with the inclined step (21).

3. The cartridge damper of claim 1, wherein, The rotor (20) is provided with a through hole (22).

4. The barrel damper of claim 3, wherein, The groove width of the spiral groove (11) is equal to the through hole (22).

5. The cartridge damper of claim 1, wherein, The inclined step (21) is provided below with a groove (30), and the groove (30) is provided with a sealing ring (31).

6. The barrel damper of claim 5, wherein, The tooth top of the spiral groove (11) is arranged below the groove (30).

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