Noise reduction type automobile front shock absorber

Abstract

The utility model discloses a noise reduction type automobile front shock absorber which is provided with a liquid storage barrel, a working cylinder is arranged in the liquid storage barrel, a first oil hole and a second oil hole which are communicated with an inner cavity of the liquid storage barrel are formed in the outer side wall of the working cylinder, a piston rod is movably arranged in the working cylinder, and a piston is connected to the piston rod. The hydraulic cylinder is characterized in that a guider is connected to the working cylinder in a threaded mode, a groove is formed in the position, connected with the working cylinder in a threaded mode, of the guider, the groove and the working cylinder jointly define a first flow channel communicated with an inner cavity of the liquid storage barrel, a rubber sleeve is arranged on the side, close to the piston rod, of the guider, and an oil passing gap is defined between the rubber sleeve and the piston rod. The guider is provided with a second flow channel communicated with the oil passing gap and the inner cavity of the liquid storage cylinder. The shock absorber is simple in structure and reasonable in design, the flowing path of shock absorption oil can be increased, the flowing amount of the shock absorption oil is increased, then the situation that foam is generated due to gas-oil mixing is reduced, and noise generated in the using process of the shock absorber is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shock absorber, concretely relates to a noise reduction type automobile front shock absorber. BACKGROUND

[0002] The shock absorber is mainly applied in the suspension system of the vehicle to realize the shock absorption of the vehicle. When the shock absorber works, the relative movement between the piston rod and the working cylinder is caused by the vehicle suspension, and then the shock absorbing oil in the working cylinder or the liquid storage cylinder is extruded to flow through the oil hole on the working cylinder, wherein a large amount of heat is generated after the shock absorber passes through the oil hole, and then the energy generated by the vibration of the vehicle is absorbed. The defects of this structure are as follows: modern cars have gradually changed into electric new energy cars, especially some logistics cars, which have basically realized electrification. Since the electric car no longer needs an engine, the noise has been greatly reduced during the motor driving process. However, due to the limited speed of the shock absorber oil passing through the oil hole, the gasification phenomenon of the oil and air mixture is easily caused when the piston rod moves quickly, which causes the oil travel foam. The noise is generated in the process of generating and disappearing of the foam, especially when the noise of the electric car is small, which is particularly obvious, and affects the user's test drive experience. SUMMARY

[0003] In view of the deficiencies in the background art, the technical problem to be solved by the utility model is to provide a noise reduction type automobile front shock absorber for solving the above problems.

[0004] To this end, the utility model is realized by adopting the following scheme:

[0005] A noise reduction type automobile front shock absorber has a liquid storage cylinder, a working cylinder is arranged in the liquid storage cylinder, a first oil hole and a second oil hole are formed in the outer side wall of the working cylinder and are in communication with the inner cavity of the liquid storage cylinder, a piston rod is movably arranged in the working cylinder, and a piston is connected to the piston rod, characterized in that a guide is screwed on the working cylinder, a groove is formed in the guide at the position where the guide is screwed on the working cylinder, the groove and the working cylinder jointly enclose a first flow channel in communication with the inner cavity of the liquid storage cylinder, a rubber sleeve is arranged on one side of the guide close to the piston rod, an oil travel gap is enclosed between the rubber sleeve and the piston rod, and the guide has a second flow channel in communication with the oil travel gap and the inner cavity of the liquid storage cylinder.

[0006] An oil seal is arranged on the guide to seal one end of the guide and the piston rod.

[0007] The second flow channel comprises a first flow groove, a second flow groove and a third flow groove which are in communication with each other, the first flow groove is in communication with the oil travel gap, and the third flow groove is in communication with the liquid storage cylinder.

[0008] The third flow groove is arranged in an inclined manner.

[0009] The noise reduction type automobile front shock absorber has the advantages that the structure of the guide is improved, the groove is arranged on the guide to cooperate with the working cylinder to enclose the first flow channel, the rubber sleeve and the flow groove are arranged on the guide to cooperate with the piston rod to enclose the second flow channel, the shock oil can flow between the working cylinder and the liquid storage cylinder through the first and second flow channels during high-speed movement of the piston rod, the flowability of the shock oil is effectively increased, the gas-oil mixing condition is further reduced, the foam generation is reduced, the noise generated during the working of the shock absorber is effectively reduced, and the utility of the user is improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model has the following drawings:

[0011] Figure 1 It is a sectional view of the utility model;

[0012] Figure 2 It is Figure 1 It is a local amplification drawing of the direction of A in the middle;

[0013] Figure 3 It is Figure 2 It is a local amplification drawing of the direction of B in the middle. PREFERRED EMBODIMENT

[0014] As shown in the figure, the utility model discloses a kind of noise reduction type automobile front shock absorber, with liquid storage cylinder 4, working cylinder 3 is arranged in liquid storage cylinder 4, first oil hole 5 and second oil hole 6 are arranged in the outer side wall of working cylinder 3, and the first oil hole 5 and the second oil hole 6 are communicated with the inner cavity of liquid storage cylinder 4, piston rod 1 is movably arranged in working cylinder 3, and piston rod 1 is connected with piston, guide 9 is screwed on working cylinder 3, recess 7 is arranged in the screwing place of guide 9 and working cylinder 3, and recess 7 is enclosed with working cylinder 3 to form first flow channel communicated with the inner cavity of liquid storage cylinder 4, rubber sleeve 12 is arranged on the side of guide 9 close to piston rod 1, and oil gap 15 is enclosed between rubber sleeve 12 and piston rod 1, and guide 9 has second flow channel communicated with oil gap 15 and the inner cavity of liquid storage cylinder 4.In the embodiment, the second flow channel includes first flow groove 14, second flow groove 10 and third flow groove 8, which are communicated with each other, the first flow groove 14 is communicated with oil gap 15, the third flow groove 8 is communicated with liquid storage cylinder 4, and the shock oil can flow quickly and stably in the second flow channel by reasonably arranging multiple flow grooves, and the third flow groove 8 is arranged obliquely, and the flow direction of the shock oil in liquid storage cylinder 4 is consistent, so that the shock oil can flow smoothly between the third flow groove 8 and liquid storage cylinder 4.Furthermore, oil seal 11 is arranged on guide 9 to seal one end of guide 9 and piston rod 1, so that the shock oil cannot flow out of working cylinder 3 from the gap between guide 9 and piston rod 1.

[0015] The utility model discloses this structure, through the improvement guide ware's structure, recess 7 is set up on guide ware 9 with the cooperation of working cylinder 3 and surrounds first flow channel, and sets up rubber bush 12 and flow groove on guide ware 9 with the cooperation of piston rod 1 and surrounds second flow channel, so that piston rod in the high -speed movement process, shock absorber oil can also flow between working cylinder 3 and liquid storage cylinder 4 through first, second flow channel, effectively increased the flowability of shock absorber oil, further reduced the gas oil mixing situation, reduced the generation of foam, effectively reduced the noise produced when the shock absorber works, especially applicable to some electrically driven vehicles of the smaller driving noise, improve the driving experience of user.

Claims

1. A noise-reducing automotive front shock absorber, comprising a reservoir (4), a working cylinder (3) disposed within the reservoir (4), a first oil hole (5) and a second oil hole (6) communicating with the inner cavity of the reservoir (4) being provided on the outer wall of the working cylinder (3), a piston rod (1) being movably disposed within the working cylinder (3), and a piston being connected to the piston rod (1), characterized in that: A guide (9) is screwed onto the working cylinder (3). The guide (9) has a groove (7) at the screw connection with the working cylinder (3). The groove (7) and the working cylinder (3) together form a first flow channel that communicates with the inner cavity of the liquid storage cylinder (4). The guide (9) has a rubber sleeve (12) on the side near the piston rod (1). The rubber sleeve (12) and the piston rod (1) form an oil flow gap (15). The guide (9) has a second flow channel that communicates with the oil flow gap (15) and the inner cavity of the liquid storage cylinder (4).

2. The noise-reducing automotive front shock absorber according to claim 1, characterized in that... An oil seal (11) is provided on the guide (9) to seal one end of the guide (9) with the piston rod (1).

3. A noise-reducing automotive front shock absorber according to claim 1, characterized in that... The second flow channel includes a first flow channel (14), a second flow channel (10), and a third flow channel (8) that are interconnected. The first flow channel (14) is connected to the oil flow gap (15), and the third flow channel (8) is connected to the liquid storage tank (4).

4. A noise-reducing automotive front shock absorber according to claim 3, characterized in that... The third flow channel (8) is set at an angle.

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