A bottom valve structure of a noise reduction shock absorber

Abstract

The utility model discloses a kind of bottom valve structures of noise reduction shock absorber, including locating rod, locating rod top end is fixedly connected with top plate, top plate bottom wall outside is fixedly connected with helical spring, helical spring bottom end is fixedly connected in lower pressing plate top wall outside, lower pressing plate inside is provided with multiple groups of annular distribution's connecting hole, valve body inside left and right sides are provided with liquid inlet passage.This kind of bottom valve structure of noise reduction shock absorber, in damper working process, when piston moves downward, under the action of pressure, make lower pressing plate and lifting ring move downward, in the process of lower pressing plate moving downward, the top of liquid outlet passage is blocked, make liquid outlet passage close, lifting ring moves downward and makes liquid inlet passage open, oil enters another cavity inside from liquid inlet passage, when piston moves upward, lower pressing plate and lifting ring move upward, make liquid outlet passage open liquid inlet passage close, oil enters top cavity inside from liquid outlet passage, so that oil inlet and outlet bottom valve form circulation path, to reduce the noise generated by damper work.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber technology, specifically to a bottom valve structure for a noise reduction shock absorber. Background Technology

[0002] Shock absorbers are used to suppress the oscillations when the spring absorbs shock and rebounds, as well as the impact from the road surface. They are widely used in automobiles to accelerate the attenuation of vibrations in the chassis and body, thereby improving the ride comfort of the car. The core components of a shock absorber are the piston and the bottom valve. When the shock absorber vibrates up and down, the piston and the bottom valve shear the fluid, generating heat, which dissipates the energy of the spring vibration. The bottom valve mainly controls the damping force of compression.

[0003] In the existing technology, the bottom valve structure of the shock absorber usually adopts a single-hole oil inlet and outlet method for damping. This damping method will cause collisions when the oil moves up and down from the fixed hole during the operation of the damper, resulting in greater noise. Therefore, a noise-reducing shock absorber bottom valve structure is needed. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a bottom valve structure for a noise reduction and shock absorber, including a valve body, wherein a circulation mechanism is provided on the inner side of the valve body.

[0006] The circulation mechanism includes a positioning rod, with a top plate fixedly connected to the top of the positioning rod. A helical spring is fixedly connected to the outer side of the bottom wall of the top plate, and the bottom end of the helical spring is fixedly connected to the outer side of the top wall of the lower pressure plate. The lower pressure plate has multiple sets of annularly distributed connecting holes inside. Liquid inlet channels are provided on both the left and right sides inside the valve body, and liquid outlet channels are provided at both the left and right ends of the middle part of the valve body. Limiting rods are fixedly connected to the lower middle part of the front and rear walls of the outer side of the positioning rod. The limiting rods are slidably connected to the inner side of the limiting grooves, which are respectively provided on the front and rear sides of the middle part of the lifting ring.

[0007] As a preferred embodiment of this utility model, the positioning rod passes through and is fixedly connected to the inside of the opening, and the opening is located in the middle of the valve body.

[0008] As a preferred embodiment of this utility model, the lower pressure plate is slidably connected to the upper side of the outer periphery of the positioning rod, and the connecting hole is located at the top of the liquid inlet channel.

[0009] In a preferred embodiment of this invention, both the inlet channel and the outlet channel penetrate the valve body, and the outlet channel is located outside the inlet channel.

[0010] As a preferred embodiment of this utility model, a fixing ring is fixedly connected to the lower outer periphery of the positioning rod, and the bottom end of the limiting rod is fixedly connected to the front and rear sides of the middle part of the top wall of the fixing ring.

[0011] As a preferred embodiment of this utility model, the limiting grooves are all fitted with the limiting rods with clearance, and the liquid inlet channels are all located directly above the lifting ring.

[0012] As a preferred embodiment of this utility model, the liquid outlet channels are all located directly below the lower pressure plate, and the liquid outlet channels are respectively located on the left and right sides above the lifting ring.

[0013] The beneficial effects of this utility model are:

[0014] This noise-reducing damper bottom valve structure works by the piston moving downwards during damper operation. Under pressure, the lower pressure plate and lifting ring move downwards, blocking the top of the outlet channel during the downward movement of the lower pressure plate, thus closing the outlet channel. The lifting ring moves downwards, opening the inlet channel, allowing oil to enter another chamber from the inlet channel. When the piston moves upwards, the lower pressure plate and lifting ring move upwards, opening the outlet channel and closing the inlet channel, allowing oil to enter the top chamber from the outlet channel. This creates a circulation path for oil entering and exiting the bottom valve, thereby reducing the noise generated by the damper during operation. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a front view schematic diagram of the overall structure of the bottom valve structure of the noise reduction and shock absorber of this utility model;

[0017] Figure 2 This is a bottom view schematic diagram of the overall structure of the bottom valve structure of the noise reduction and shock absorber of this utility model;

[0018] Figure 3 This is a front view schematic diagram of the adjustment structure of the bottom valve structure of a noise reduction and shock absorber according to this utility model;

[0019] Figure 4 This is a top view schematic diagram of the valve body structure of the bottom valve structure of a noise reduction and shock absorber according to this utility model.

[0020] In the diagram: 1. Valve body; 2. Circulation mechanism; 3. Opening; 4. Inlet channel; 5. Outlet channel; 6. Positioning rod; 7. Top plate; 8. Helical spring; 9. Connecting hole; 10. Lower pressure plate; 11. Fixing ring; 12. Limiting rod; 13. Limiting groove; 14. Lifting ring. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example: Figures 1-4 As shown, the present invention provides a bottom valve structure for a noise reduction and shock absorber, including a valve body 1, and a circulation mechanism 2 is provided on the inner side of the valve body 1.

[0023] The circulation mechanism 2 includes a positioning rod 6, which connects and fixes the valve body 1 to determine its position. The positioning rod 6 is fixed in the middle of the bottom wall of the oil pipe cavity. The valve body 1 is installed at the bottom of the damper tube, isolating the first cavity from the second cavity. A top plate 7 is fixedly connected to the top of the positioning rod 6, and a helical spring 8 is fixedly connected to the outer side of the bottom wall of the top plate 7. The helical spring 8 connects to the lower pressure plate 10 and allows the lower pressure plate 10 to bear a certain prestress. The bottom end of the helical spring 8 is fixedly connected to the outer side of the top wall of the lower pressure plate 10. The lower pressure plate 10 has multiple sets of annularly distributed connecting holes 9 inside. The connecting holes 9 prevent the top of the inlet channel 4 from being sealed when the lower pressure plate 10 is in contact with the top of the valve body 1. This allows the oil to pass through the inside of the inlet channel 4. The valve body 1 has inlet channels 4 on both the left and right sides, and outlet channels 5 on both the left and right ends of the middle part of the valve body 1. The outlet channels 5 are dedicated channels for the bottom cavity to enter the upper cavity. The inlet channels 4 and outlet channels 5 form a circulation, making the oil movement smoother and thus reducing the noise generated by the damper. The lower middle part of the front and rear walls of the positioning rod 6 is fixedly connected to the limiting rod 12. The limiting rod 12 is slidably connected to the inside of the limiting groove 13. The limiting rod 12 and the limiting groove 13 cooperate to restrict the lifting ring 14, so that the lifting ring 14 can only move up and down and cannot rotate. The limiting groove 13 is respectively set on the front and rear sides of the middle part of the lifting ring 14.

[0024] The positioning rod 6 passes through and is fixedly connected to the inside of the opening 3. The opening 3 is located in the middle of the valve body 1. The lower pressure plate 10 is slidably connected to the upper side of the outer periphery of the positioning rod 6. The connecting hole 9 is located at the top of the liquid inlet channel 4. The positioning rod 6 is fixed to the inside of the opening 3 to fix the valve body 1 and determine the installation position of the valve body 1. The oil enters the liquid inlet channel 4 through the lower pressure plate 10 from the connecting hole 9.

[0025] Both the inlet channel 4 and the outlet channel 5 pass through the valve body 1. The outlet channel 5 is located outside the inlet channel 4. A fixing ring 11 is fixedly connected to the lower outer side of the positioning rod 6. The bottom end of the limiting rod 12 is fixedly connected to the front and rear sides of the middle of the top wall of the fixing ring 11. The fixing ring 11 can connect and fix the positioning rod 6 and the limiting rod 12, and at the same time can support the lifting ring 14 to prevent it from failing to reset and block the bottom of the inlet channel 4 under pressure.

[0026] The limiting grooves 13 are all clearance-fitted with the limiting rods 12. The liquid inlet channels 4 are all located directly above the lifting ring 14, and the liquid outlet channels 5 are all located directly below the lower pressure plate 10. The liquid outlet channels 5 are located on the left and right sides above the lifting ring 14. The lower pressure plate 10 can only block the top of the liquid outlet channel 5, and the lifting ring 14 can only block the bottom of the liquid inlet channel 4.

[0027] Working principle: During the operation of the damper, when the piston moves downward, the pressure causes the lower pressure plate 10 and the lifting ring 14 to move downward. During the downward movement of the lower pressure plate 10, the top of the outlet channel 5 is blocked, thus closing the outlet channel 5. The lifting ring 14 moves downward, opening the inlet channel 4. The oil enters the other cavity from the inlet channel 4. When the piston moves upward, the lower pressure plate 10 and the lifting ring 14 move upward, opening the outlet channel 5 and closing the inlet channel 4. The oil enters the top cavity from the outlet channel 5, thus forming a circulation path for the oil inlet and outlet of the bottom valve. The oil inlet and outlet of the bottom valve do not interfere with each other, reducing the obstruction of oil movement and thus reducing the noise generated by the damper during operation.

[0028] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bottom valve structure for a noise reduction and vibration damping device, comprising a valve body (1), characterized in that: A circulation mechanism (2) is provided on the inner side of the valve body (1); The circulation mechanism (2) includes a positioning rod (6), a top plate (7) is fixedly connected to the top of the positioning rod (6), a spiral spring (8) is fixedly connected to the outer side of the bottom wall of the top plate (7), the bottom end of the spiral spring (8) is fixedly connected to the outer side of the top wall of the lower pressure plate (10), the lower pressure plate (10) is provided with multiple sets of annularly distributed connecting holes (9), the valve body (1) is provided with liquid inlet channels (4) on both the left and right sides, the valve body (1) is provided with liquid outlet channels (5) at both the left and right ends of the middle part of the valve body (1), the positioning rod (6) is fixedly connected to the lower middle part of the front and rear walls, the limiting rod (12) is slidably connected to the inner side of the limiting groove (13), the limiting groove (13) is respectively provided on the front and rear sides of the middle part of the lifting ring (14).

2. The bottom valve structure of a noise reduction and vibration damper according to claim 1, characterized in that, The positioning rod (6) passes through and is fixedly connected to the inside of the opening (3), which is located in the middle of the valve body (1).

3. The bottom valve structure of a noise reduction and vibration damper according to claim 1, characterized in that, The lower pressure plate (10) is slidably connected to the upper side of the outer periphery of the positioning rod (6), and the connecting hole (9) is located at the top of the liquid inlet channel (4).

4. The bottom valve structure of a noise reduction and vibration damper according to claim 1, characterized in that, Both the inlet channel (4) and the outlet channel (5) penetrate the valve body (1), and the outlet channel (5) is located outside the inlet channel (4).

5. The bottom valve structure of a noise reduction and vibration damper according to claim 1, characterized in that, The positioning rod (6) is fixedly connected to a fixing ring (11) on its lower outer periphery, and the bottom end of the limiting rod (12) is fixedly connected to the front and rear sides of the top wall of the fixing ring (11).

6. The bottom valve structure of a noise reduction and vibration damper according to claim 1, characterized in that, The limiting grooves (13) are all fitted with the limiting rods (12) with clearance, and the liquid inlet channels (4) are all located directly above the lifting rings (14).

7. The bottom valve structure of a noise reduction and vibration damper according to claim 1, characterized in that, The liquid outlet channels (5) are all located directly below the lower pressure plate (10), and the liquid outlet channels (5) are located on the left and right sides above the lifting ring (14).

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