CN102128233A - Multi-strand spiral spring shock absorber - Google Patents

Abstract

A multi-strand coil spring shock absorber, mainly composed of a shock absorbing spring (3), a buffer spring (8), an intermediate tube (5), an outer tube (9), a piston tube (7), an end cover (1), Back-up ring (11), dust cover (4) constitute, and wherein, damping spring is multi-strand coil spring, buffer spring is single-strand coil spring or multi-strand coil spring. The hardness of the multi-strand coil spring shock absorber of the present invention will dynamically change with the change of the vehicle load and self-weight, thereby having a better damping effect than the single-strand coil spring; at the same time, due to the mechanism characteristics of the multi-strand coil spring, the The multi-strand coil spring shock absorber has longer service life and stability. The multi-strand coil spring shock absorber of the present invention can be widely used in shock absorbing systems of automobiles, motorcycles, electric vehicles and other vehicles.

Description

Multi-strand coil spring shock absorber

technical field

The invention belongs to the technical field of damping devices for motorcycles, light motor vehicles and vibration machines.

Background technique

At present, the commonly used shock absorbers include rubber shock absorbers, spring shock absorbers, air shock absorbers, oil air air shock absorbers, and full oil hydraulic shock absorbers. Among them, the use of spring shock absorbers most widely.

The shock absorber is mainly used to suppress the shock when the spring rebounds after absorbing the shock and the impact from the road surface. When passing through uneven roads, although the shock-absorbing spring can filter the vibration of the road surface, the spring itself will reciprocate, and the shock absorber is used to suppress this spring jumping. Shock absorber is too soft, automobile body can hop up and down, shock absorber can bring too great resistance too forcedly, cloggy bedspring works normally. A hard shock absorber should be matched with a hard spring, and the hardness of the spring is closely related to the weight of the car, so a heavier car generally uses a harder shock absorber. The quality of vehicles such as automobiles or motorcycles changes with the load, so the hardness of the required shock absorber must change with the weight of the vehicle to better meet the shock absorption requirements. The springs in the spring shock absorbers currently used are all single-strand coil springs wound by a steel wire. The elastic stiffness coefficient is a constant and cannot be changed with the load. Shock absorbers cannot meet the shock absorption requirements under changing load conditions very well.

Contents of the invention

The purpose of the present invention is to provide a multi-strand coil spring shock absorber for the existing single-strand coil spring shock absorber, which has a constant spring elastic stiffness coefficient and cannot meet the shock-absorbing requirements under load changes.

A multi-strand coil spring shock absorber involved in the present invention includes a shock absorbing spring, a buffer spring, an intermediate tube, an outer tube, a piston tube, an end cover, a retaining ring, and a sealing ring, and the buffer spring and the retaining ring are sequentially placed on the On the piston tube, the piston tube is fixed in the outer cylinder by screws, the middle tube ring is inserted into the outer cylinder on the piston tube and connected with the retaining ring, the shock absorbing spring is placed inside the left side of the middle tube, and the end cap is installed in the middle tube At the left end of the tube, the middle tube and the outer tube are fixed and sealed by a sealing ring and a dust cover. The piston tube has a throttle hole on both sides of the retaining ring, and the outer tube has an oil injection hole and is sealed by a screw; the end cover When the left side is subjected to an impact load, the end cover, the middle tube and the retaining ring slide along the piston tube in the outer tube as a whole, and the shock absorbing spring is compressed between the end cover and the piston tube to absorb the load; at the same time, the inner cavity of the outer tube The oil flows from the left to the right of the retaining ring through the orifice on the piston barrel; when the shock absorbing spring rebounds, the oil in the inner cavity of the outer cylinder flows from the right to the left of the retaining ring through the orifice on the piston barrel, The cushioning spring is compressed to achieve a cushioning and damping effect.

In the multi-strand coil spring shock absorber involved in the present invention, since the damping spring adopts a multi-strand coil spring, the helical direction of the steel wire winding is opposite to the helical direction of the spring. The greater the tightening degree of the cable, the torsional rigidity of the cable gradually increases, which leads to the gradual increase of the stiffness coefficient of the multi-strand coil spring, that is, the hardness of the multi-strand coil spring shock absorber will change with the load and self-weight of the vehicle. Dynamic changes, so that it has a better damping effect than the single-strand coil spring; at the same time, due to the mechanism characteristics of the multi-strand coil spring, the multi-strand coil spring shock absorber has a longer service life and stability. The multi-strand coil spring shock absorber of the present invention can be widely used in shock absorbing systems of automobiles, motorcycles, electric vehicles and other vehicles.

Description of drawings

Fig. 1 is a structural diagram of Embodiment 1 of the present invention.

Fig. 2 is a structural diagram of Embodiment 2 of the present invention.

In the figure: 1 end cover; 2○ type sealing ring I; 3 shock absorbing spring; 4 dustproof cover; 5 intermediate tube; 6○ type sealing ring II; 7 piston tube; circle; 11 retaining ring; 12, screw I; 13 screw II;

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention is further described as follows:

Example 1

Fig. 1 is the structural diagram of embodiment 1 of the present invention, as shown in Fig. 1, this multi-strand coil spring shock absorber comprises shock absorbing spring 3, buffer spring 8, intermediate bobbin tube 5, piston tube 7, retaining ring 11, Outer cylinder 9, end cover 1, dustproof cover 4 etc. The middle tube 5 is set on the end cover 1, the damping spring 3 is put into the middle tube 5, the piston tube 7 is set into the middle tube 5, the buffer spring 8 is set on the piston tube 7, and the retaining ring 11 is set on the piston The tube 7 is connected to the right end of the middle tube 5, the buffer spring 8 and the shock spring 3 are packaged in the middle tube 5, the piston tube 7 is inserted into the outer tube 9 and fixed inside the outer tube 9 by screws II13, the middle tube The tube 5, the end cover 1 and the piston tube 7 are sealed by the ○-shaped sealing ring I 2 and the ○-shaped sealing ring II6, the retaining ring 11 and the piston tube 7 are sealed by the sealing ring 10, and the outer cylinder 9 and the middle tube 5 are sealed by the anti- The dust cover 4 is sealed, and the oil is injected into the inner cavity of the outer cylinder 9 through the oil injection hole and sealed by the screw I12. Wherein, both the damping spring 3 and the buffer spring 8 are multi-strand coil springs. When the load changes, the compression of the shock absorbing spring 3 changes, and the stiffness coefficient of the corresponding shock absorbing spring changes, thereby changing the hardness of the shock absorber; The barrel tube 5 and retaining ring 11 move along the piston tube 7 in the outer cylinder 9, and the damping spring 3 is compressed to absorb the shock. The left side of 11 flows into the right side; when the shock absorbing spring 3 rebounds, the oil in the outer cylinder 9 flows from the right side of the block diagram 11 to the left side through the orifice on the piston tube 7, and realizes buffering together with the buffer spring 8 with damping effect.

Example 2:

Fig. 2 is the structural diagram of embodiment 2 of the present invention, as shown in Fig. 2, this multi-strand coil spring shock absorber comprises shock absorbing spring 3, cushioning spring 8, intermediate bobbin tube 5, piston tube 7, retaining ring 11, Outer cylinder 9, end cover 1, dustproof cover 4 etc. The middle tube 5 is set on the end cover 1, the damping spring 3 is put into the middle tube 5, the piston tube 7 is set into the middle tube 5, the buffer spring 8 is set on the piston tube 7, and the retaining ring 11 is set on the piston The tube 7 is connected to the right end of the middle tube 5, the buffer spring 8 and the shock spring 3 are packaged in the middle tube 5, the piston tube 7 is inserted into the outer tube 9 and fixed inside the outer tube 9 by screws 13, the middle tube Tube 5, end cover 1 and piston tube 7 are sealed by ○-shaped sealing ring I2 and ○-shaped sealing ring II6, retaining ring 11 and piston tube 7 are sealed by sealing ring 10, outer cylinder 9 and intermediate tube 5 are sealed by dust-proof The cover 4 is sealed, and the oil is injected into the inner cavity of the outer cylinder 9 through the oil injection hole and sealed by the screw 12 . Wherein, the damping spring 3 is a multi-strand coil spring, and the buffer spring 8 is a single-strand coil spring. When the load changes, the compression of the shock absorbing spring 3 changes, and the stiffness coefficient of the corresponding shock absorbing spring changes, thereby changing the hardness of the shock absorber; The barrel tube 5 and retaining ring 11 move along the piston tube 7 in the outer cylinder 9, and the damping spring 3 is compressed to absorb the shock. The left side of 11 flows into the right side; when the damping spring 3 rebounds, the oil in the outer cylinder 9 flows from the right side of the retaining ring 11 to the left side through the orifice on the piston tube 7, and realizes buffering together with the buffer spring 8 with damping effect.

Claims (2)

1. A multi-strand coil spring shock absorber, comprising a shock absorbing spring (3), a buffer spring (8), an intermediate tube (5), a piston tube (7), a retaining ring (11), and an outer tube (9) , end cover (1), dust cover (4), the middle tube (5) is set on the end cover (1), the damping spring (3) is put into the middle tube (5), the piston tube (7) Put it into the middle tube (5), set the buffer spring (8) on the piston tube (7), put the retaining ring (11) on the piston tube (7) and connect it with the right end of the middle tube (5), put The buffer spring (8) and the damping spring (3) are packaged in the middle tube (5), the piston tube (7) is inserted into the outer tube (9) and fixed inside the outer tube (9) by screw II (13), and the middle The bobbin (5), end cap (1) and piston tube (7) are sealed by ○-shaped sealing rings I (2) and (6), and the retaining ring (11) and the piston tube (7) are sealed by sealing ring II (10 ) for sealing, the outer cylinder (9) and the middle cylinder tube (5) are sealed through the dust cover (4), the oil is injected into the inner cavity of the outer cylinder (9) through the oil injection hole and sealed by the screw (12); it is characterized in that The damping spring (3) adopts a multi-strand coil spring, and its stiffness coefficient can change with load and impact force, so that the hardness of the shock absorber can be automatically adjusted. 2. A multi-strand coil spring shock absorber according to claim 1, characterized in that the buffer spring (8) is a single-strand coil spring or a multi-strand coil spring.

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