CN102979848A - Inversion type rear shock absorber with adjustable prepressure of shock absorber spring - Google Patents

Abstract

The invention discloses an inverted rear shock absorber with adjustable preload of the shock absorbing spring, which comprises an upper joint, a lower joint, a double cylinder cylinder, a shock absorbing connecting rod, a shock absorbing spring, an oil seal, a piston body, and a shock absorbing connecting rod. The lower end of the rod is locked on the lower joint through a nut, the upper end of the double-barrel cylinder is fixed with the upper joint, and the upper end of the shock-absorbing connecting rod extends into the working cylinder of the double-barrel cylinder; the upper part of the double-barrel cylinder A spring support base is set in the sleeve, and the spring support base is connected with a hydraulic adjustment handle through a hydraulic pipe. The upper end of the damping spring is against the lower surface of the spring support base, and the lower end of the damping spring is against the upper surface of the lower joint. By adding spring support bases, pipelines and hydraulic adjustment pumps, the pre-pressure adjustment mechanism of the shock absorber spring can be adjusted to meet the requirements of different vehicle working conditions and road conditions, improving driving comfort and maneuverability; while simplifying the overall structure , reducing costs.

Description

Inverted rear shock with adjustable spring preload

technical field

The invention relates to a vehicle shock absorber, in particular to a motorcycle rear shock absorber.

Background technique

Fig. 1 shows a traditional hydraulic damping type rear shock absorber, and Fig. 2 shows the installation diagram of the rear shock absorber on a vehicle frame. Combining with Figure 1 and Figure 2, it can be seen that the rear shock absorber is mainly composed of upper joint 1, lower joint 2, double cylinder cylinder body 3, shock absorbing connecting rod 4, shock absorbing spring 5, oil seal 6, guide seat 7, piston body 8 , buffer spring 10 and other components. The upper end of the shock-absorbing connecting rod 4 is locked on the upper joint 1 through a nut, the lower end of the double-barrel cylinder 3 is welded with the lower joint 2, and the lower end of the shock-absorbing connecting rod 4 extends into the working position of the double-barrel cylinder 3. In the cylinder. A piston body 8 is arranged between the shock-absorbing connecting rod 4 and the working cylinder, and the piston body 8 divides the working cylinder into an upper chamber A and a lower chamber B. An oil seal 6 and a guide seat 7 are arranged between them, and a damping hole 8a is opened on the piston body 8 to connect the upper chamber A and the lower chamber B. The upper end of the rear shock absorber is hinged on the vehicle frame 18 through the upper joint 1 , and the lower end is hinged on the rear fork 19 through the lower joint 2 . When the vehicle encounters an obstacle and the load increases, the damping spring 5 is compressed, the damping connecting rod 4 moves downward relatively, the volume of the lower chamber B decreases, and the oil flows upward through the damping hole 8a to the upper chamber A. When the damping spring 5 returns to its original position, the oil flows downward, and is resisted when the oil passes through the damping hole 8a, thereby realizing the effect of shock absorption.

With the development of rear shock absorber technology, an inverted rear shock absorber has appeared, such as "an inverted rear shock absorber" disclosed by the State Intellectual Property Office, the patent number is 20082099733.5, that is, the upper end of the shock absorber connecting rod and the upper joint 1-connection, the lower end of the double-tube cylinder is connected to the lower joint. Compared with the traditional hydraulic damping rear shock absorber, the shock absorption effect is better and the driving comfort is higher. However, the current inverted rear shock absorbers usually have a complex structure and a large number of parts; at the same time, the preload of the shock absorber spring has been determined at the time of design, and its shock absorber characteristics can only match a certain driving characteristic, and cannot satisfy According to the requirements of different road conditions and load capacity, the handling and comfort of the vehicle still need to be improved.

Contents of the invention

The present invention improves on the above-mentioned technical problems, and aims to provide an inverted rear shock absorber capable of adjusting the preload of the shock absorber spring, so as to adapt to different road conditions and load requirements, and improve driving comfort and maneuverability.

In order to solve the above technical problems, the present invention provides an inverted rear shock absorber with adjustable shock spring preload, which includes an upper joint (1), a lower joint (2), a double cylinder cylinder (3), a shock absorber The connecting rod (4) and the damping spring (5), the key is: the lower end of the damping connecting rod (4) is locked on the lower joint (2) through a nut, and the upper end of the double cylinder cylinder (3) is connected to the upper The joints (1) are fixed together, the upper end of the shock absorbing connecting rod (4) extends into the working cylinder of the double-barrel cylinder (3), and a piston body is arranged between the shock absorbing connecting rod (4) and the working cylinder (8), the piston body (8) divides the working cylinder (3b) into an upper chamber (A) and a lower chamber (B), and the lower end of the double cylinder cylinder (3) is connected with the shock absorbing connecting rod ( 4) An oil seal (6) is arranged between, and a damping hole (8a) is opened on the piston body (8) to connect the upper chamber (A) and the lower chamber (B); The upper part of (3) is fitted with a spring support base (12), the spring support base (12) is connected to the hydraulic adjustment pump (14) through the pipeline (13), and the upper end of the shock absorbing spring (5) is against the spring The lower surface of the support base (12), the lower end of the damping spring (5) is against the upper surface of the lower joint (2).

The working process and principle are as follows: When the car encounters a bumpy road or the load increases, the pressure in the pipeline is increased by hydraulically adjusting the pump, thereby pushing the spring support base to move downward and compressing the shock absorbing spring to improve The preload of the shock absorber spring; the working principle during driving is the same as that of the existing inverted rear shock absorber. When the car encounters an obstacle, the shock absorber spring is compressed, and the shock absorber connecting rod moves upward relatively, and the upper cavity The volume of the body decreases, and the oil flows down the cavity through the orifice. When the shock-absorbing spring recovers, the oil flows upward, and is resisted when the oil passes through the damping hole, thereby realizing the effect of shock absorption.

A guide seat (7) is provided between the above-mentioned working cylinder and the shock absorbing connecting rod (4), the guide seat (7) is located above the oil seal (6), and a limit pad (9) is provided below the piston body (8) , a buffer spring (10) is installed on the shock-absorbing connecting rod (4) between the limit pad (9) and the guide seat (7), and the top of the double-barrel cylinder (3) is fixed with an oil storage chamber (C), the bottom valve body (11) and the bottom valve limit plate (16), the oil storage chamber (C) is connected to the upper cavity ( A) Communication, between the piston body (8) and the limit pad (9), between the bottom valve body (11) and the bottom valve limit piece (16) are respectively provided with a valve plate (17) and a valve spring (15); the valve plate (17) arranged between the piston body (8) and the spacer pad (9) covers the damping hole (8a), and the corresponding valve leaf spring (15) pushes against the valve plate (17 ), the valve piece (17) arranged between the bottom valve body (11) and the bottom valve limit piece (16) covers the oil hole (11a), and the corresponding valve leaf spring (15) is pressed against the valve on the sheet (17). The guide seat guides the up and down movement of the shock absorber connecting rod, combined with the buffer spring, bottom valve body, valve plate and valve plate spring, etc., further improves the shock absorption effect of the rear shock absorber.

The damping hole (8a) is composed of an axial through hole and a radial hole perpendicular to the axial through hole, the overall shape is "L", and the structure of the damping hole is optimized to facilitate the processing of the damping hole.

Preferably, the upper joint (1) is provided with a mounting hole, and a shock absorber (1a) and a spacer ring (1b) are provided in the mounting hole, and the upper joint (1) and the double-barreled cylinder (3) are welded on Together.

Beneficial effect:

(1) The preload of the shock absorbing spring can be adjusted by adding a spring support base, a pipeline and a hydraulic adjustment pump. The user can adjust the pre-pressure according to the load capacity of the vehicle and the road surface conditions, so as to enhance the shock absorption performance of the vehicle, improve the adhesion and safety between the wheels and the road surface, and meet the requirements of multiple working conditions of the vehicle, as well as people's expectations for vehicle comfort and maneuverability. high requirements.

(2) Compared with the existing inverted shock absorber, the inverted rear shock absorber has a simpler and more compact structure, which effectively reduces the manufacturing cost.

Description of drawings

Fig. 1 is a structural schematic diagram of a conventional hydraulic damping type rear shock absorber.

Fig. 2 is a schematic diagram of the installation of the hydraulic damping type rear shock absorber on the vehicle frame.

Fig. 3 is a structural schematic diagram of the present invention.

FIG. 4 is a partially enlarged view of FIG. 3 .

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

Combined with the inverted rear shock absorber with adjustable shock spring preload shown in Figure 3 and Figure 4, it consists of an upper joint 1, a lower joint 2, a double cylinder cylinder 3, a damping connecting rod 4, a damping spring 5, Oil seal 6, guide seat 7, piston body 8, limit pad 9, buffer spring 10, bottom valve body 11, spring support base 12, pipeline 13, hydraulic adjustment pump 14, valve leaf spring 15, bottom valve limit plate 16 , valve plate 17 and so on.

The lower end of the shock-absorbing connecting rod 4 is locked on the lower joint 2 through a nut, and the upper end of the double-tube cylinder body 3 is fixed with the upper joint 1 . The lower end of the double-barrel cylinder body 3 is an open end, and the upper end of the shock-absorbing connecting rod 4 stretches in the working cylinder of the double-barrel cylinder body 3 . A piston body 8 is arranged between the damping connecting rod 4 and the working cylinder, the piston body 8 is locked on the damping connecting rod 4 through a nut, and the piston body 8 divides the working cylinder into an upper chamber A and a lower chamber B. An oil seal 6 is arranged between the lower end of the double-tube cylinder body 3 and the shock absorbing connecting rod 4, so as to prevent the oil liquid in the working cylinder from overflowing. A damping hole 8a is opened on the piston body 8 to connect the upper chamber A and the lower chamber B. The upper part of the double-barrel cylinder body 3 is covered with a spring support base 12 , the spring support base 12 is slidingly connected with the double-barrel cylinder body 3 , and the spring support base 12 is connected with the hydraulic adjustment pump 14 through a pipeline 13 . Hydraulic adjustment pump 14 preferably selects manual hydraulic pump for use, to save cost. By hydraulically adjusting the pump 14 , the pressure in the pipeline 13 is increased or decreased, thereby pushing the spring support base 12 to slide up and down along the double cylinder cylinder body 3 . The damping spring 5 is arranged between the spring supporting base 12 and the lower joint 2 , the upper end of the damping spring 5 is against the lower surface of the spring supporting base 12 , and the lower end of the damping spring 5 is against the upper surface of the lower joint 2 .

Preferably, a guide seat 7 is provided between the working cylinder and the shock-absorbing connecting rod 4, the guide seat 7 is located above the oil seal 6, and is fixed through the closing port at the lower end of the working cylinder. A limit pad 9 is arranged below the piston body 8 , and a buffer spring 10 is installed on the shock-absorbing connecting rod 4 between the limit pad 9 and the guide seat 7 . The top of the double-barrel cylinder body 3 is fixed with an oil storage chamber C, a bottom valve body 11 and a bottom valve stopper 16, the bottom valve stopper 16 is located inside the bottom valve body 11, and the oil storage chamber C The oil hole 11a on the valve body 11 communicates with the upper chamber A. A valve plate 17 and a valve leaf spring 15 are respectively arranged between the piston body 8 and the limit pad 9 , and between the bottom valve body 11 and the bottom valve limit plate 16 . The valve plate 17 arranged between the piston body 8 and the limit pad 9 covers the damping hole 8a, and the corresponding valve leaf spring 15 is supported on the valve plate 17; similarly, the bottom valve body 11 and the bottom valve limit The valve plate 17 between the plates 16 covers the oil passage hole 11a, and the corresponding valve plate spring 15 bears on the valve plate 17.

Secondly, the damping hole 8a is preferably composed of an axial through hole and a radial hole perpendicular to the axial through hole, and the overall shape is "L". Further, an installation hole is provided on the upper joint 1, and a shock absorber 1a and a spacer ring 1b are arranged in the installation hole, and the upper joint 1 and the double-barreled cylinder body 3 are welded together. Mounting holes are also arranged on the lower joint 2 .

Claims (4)

1. damping behind the adjustable upside-down of a damping spring precompression, comprise upper connection (1), lower contact (2), double barreled cylinder body (3), damping connecting rod (4) and damping spring (5), it is characterized in that: the lower end of described damping connecting rod (4) by nut check in lower contact (2), the upper end of double barreled cylinder body (3) and upper connection (1) are fixed together, the upper end of damping connecting rod (4) is stretched in the clutch release slave cylinder of double barreled cylinder body (3), and between damping connecting rod (4) and clutch release slave cylinder, be provided with piston body (8), described piston body (8) is separated into upper cavity (A) and lower chamber (B) with clutch release slave cylinder (3b), between the lower end of double barreled cylinder body (3) and damping connecting rod (4), be provided with oil sealing (6), have damping hole (8a) at described piston body (8) upper cavity (A) and lower chamber (B) are communicated with; The top of described double barreled cylinder body (3) is set with spring supporting base (12), described spring supporting base (12) links to each other with hydraulic regulation pump (14) by pipeline (13), the upper end of described damping spring (5) is against the lower surface of spring supporting base (12), and the lower end of damping spring (5) is against the upper surface of lower contact (2).

2. according to damping behind the adjustable upside-down of damping spring precompression claimed in claim 1, it is characterized in that: between described clutch release slave cylinder and damping connecting rod (4), be provided with guide holder (7), guide holder (7) is positioned at the top of oil sealing (6), be provided with spacing pad (9) in the below of piston body (8), damping connecting rod (4) between spacing pad (9) and guide holder (7) is equipped with buffer spring (10), the top of described double barreled cylinder body (3) is installed with shoe cream room (C), bottom valve body (11) and bottom valve banking stop (16), described shoe cream room (C) is communicated with upper cavity (A) by the oil-through hole (11a) that is arranged on the bottom valve body (11), between described piston body (8) and the spacing pad (9), be respectively arranged with valve block (17) and valve block spring (15) between bottom valve body (11) and the bottom valve banking stop (16); The valve block (17) that is arranged between piston body (8) and the spacing pad (9) covers damping hole (8a), corresponding valve block spring (15) withstands on this valve block (17), the valve block (17) that is arranged between bottom valve body (11) and the bottom valve banking stop (16) covers oil-through hole (11a), and corresponding valve block spring (15) withstands on this valve block (17).

3. according to damping behind the adjustable upside-down of claim 1 or 2 described damping spring precompressions, it is characterized in that: described damping hole (8a) is comprised of the radial hole of axial hole and through hole perpendicular to axial direction, and is whole L-shaped.

4. according to damping behind the adjustable upside-down of damping spring precompression claimed in claim 3, it is characterized in that: described upper connection (1) is provided with mounting hole, be provided with shock absorbing sleeve (1a) and spacer ring (1b) in the mounting hole, upper connection (1) welds together with double barreled cylinder body (3).

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