阅读说明：本技术 一种汽车悬架用筒式减震器 (Drum-type shock absorber for automobile suspension ) 是由 朱林 姚春生 杨行愿 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种汽车悬架用筒式减震器,包括液压筒体,液压筒体外壁有外筒体,液压筒体内上部设有多个上液压腔,每个上液压腔内上活塞顶部分别连接有上活塞杆,上活塞杆从液压筒体顶部穿出后共同连接上连接板,上连接板与液压筒体上端之间连接有上弹簧,液压筒体内下部设有下液压腔,各个上液压腔下端分别连通至下液压腔顶部,下液压腔内安装有下活塞,下活塞底部下活塞杆从液压筒体底部穿出,下活塞杆下端连接有下连接板,下连接板与液压筒体下端之间连接有下弹簧,液压筒体侧壁设有第一、第二开口,第一开口通外筒体和各个上液压腔内上部,第二开口连通至外筒体和下液压腔内下部。本发明提高了减震器的减震效果。(The invention discloses a cylinder shock absorber for an automobile suspension, which comprises a hydraulic cylinder body, wherein the outer wall of the hydraulic cylinder body is provided with an outer cylinder body, the upper part in the hydraulic cylinder body is provided with a plurality of upper hydraulic cavities, the top of an upper piston in each upper hydraulic cavity is respectively connected with an upper piston rod, the upper piston rods are jointly connected with an upper connecting plate after penetrating out of the top of the hydraulic cylinder body, an upper spring is connected between the upper connecting plate and the upper end of the hydraulic cylinder body, the lower part in the hydraulic cylinder body is provided with a lower hydraulic cavity, the lower end of each upper hydraulic cavity is respectively communicated with the top of a lower hydraulic cavity, a lower piston is arranged in the lower hydraulic cavity, the lower piston rod at the bottom of the lower piston penetrates out of the bottom of the hydraulic cylinder body, the lower end of the lower piston rod is connected, and the first opening is communicated with the upper parts in the outer cylinder body and each upper hydraulic cavity, and the second opening is communicated with the lower parts in the outer cylinder body and the lower hydraulic cavity. The invention improves the damping effect of the damper.)

1. The utility model provides a cylinder bumper shock absorber for automotive suspension which characterized in that: the hydraulic cylinder comprises a hydraulic cylinder body which is vertical in the axial direction, an outer cylinder body is coaxially sleeved and fixed on the outer wall of the hydraulic cylinder body, a plurality of upper hydraulic cavities are arranged at the upper part in the hydraulic cylinder body, the axial direction of each upper hydraulic cavity is respectively parallel to the axial direction of the hydraulic cylinder body, an upper piston is respectively arranged in each upper hydraulic cavity, the top parts of the upper pistons are respectively connected with an upper piston rod, the upper piston rods respectively penetrate out of the top parts of the hydraulic cylinder body, the upper end of each upper piston rod is commonly connected with an upper connecting plate, an upper spring is connected between the upper connecting plate and the upper end of the hydraulic cylinder body and sleeved outside each upper piston rod, a lower hydraulic cavity is arranged at the lower part in the hydraulic cylinder body, the lower end of each upper hydraulic cavity is respectively communicated with the top part of the lower hydraulic cavity, the radial cross-sectional area of the lower hydraulic cavity is larger than the sum of the radial cross-sectional areas of the upper hydraulic cavities, the lower end of the lower piston rod is connected with a lower connecting plate, a lower spring is connected between the lower connecting plate and the lower end of the hydraulic cylinder, the lower spring is sleeved outside the lower piston rod, one side of the hydraulic cylinder is provided with a first opening corresponding to the upper part of each upper hydraulic cavity, one end of the first opening is communicated into the outer cylinder, the other end of the first opening is communicated with the upper part of each upper hydraulic cavity, the other side of the hydraulic cylinder is provided with a second opening corresponding to the lower part of the lower hydraulic cavity, one end of the second opening is communicated into the outer cylinder, and the other end of the second opening is communicated to the lower part of the lower hydraulic cavity.

2. A tube damper for an automobile suspension as claimed in claim 1, wherein: the upper hydraulic cavity is circumferentially and uniformly distributed on the upper part in the hydraulic cylinder body.

3. A tube damper for an automobile suspension as claimed in claim 1, wherein: the center of the bottom of the upper connecting plate is connected with a connecting shaft, the center of the upper end of the hydraulic cylinder is provided with a circular groove, a rubber body is arranged in the circular groove, and the lower end of the connecting shaft extends into the circular groove and is connected with the rubber body into a whole.

4. A tube damper for an automobile suspension as claimed in claim 3, wherein: the improved rubber sealing device is characterized in that an upper pressing plate and a lower pressing plate are fixed in the circular groove, wherein the lower pressing plate is located at the bottom of the circular groove, the upper pressing plate is located at the notch of the circular groove, the rubber body is fixedly connected between the upper pressing plate and the lower pressing plate, the side wall of the rubber body is fixed with the inner wall of the circular groove into a whole, and the lower end of the connecting shaft is fixedly connected to the upper pressing.

Technical Field

The invention relates to the field of automobile shock absorbers, in particular to a cylindrical shock absorber for an automobile suspension.

Background

In order to quickly attenuate the vibration of a frame and a vehicle body in an automobile, a shock absorber is generally mounted on a suspension system, and the shock absorber absorbs the shock, so that the smoothness and the comfort of the running of the automobile are improved. The cylinder type shock absorber is a common shock absorber structure, which generally comprises a hydraulic cylinder, a spring, a connecting plate and the like, and the shock absorption function is realized by utilizing the hydraulic cylinder and the spring. The prior art cylinder shock absorber has good shock absorption effect to high-frequency small amplitude vibration, but has limited shock absorption effect to low-frequency large amplitude vibration.

Disclosure of Invention

The invention aims to provide a tubular shock absorber for an automobile suspension, which aims to solve the problem that the tubular shock absorber in the prior art has a limited low-frequency large-amplitude shock absorption effect.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a cylinder bumper shock absorber for automotive suspension which characterized in that: the hydraulic cylinder comprises a hydraulic cylinder body which is vertical in the axial direction, an outer cylinder body is coaxially sleeved and fixed on the outer wall of the hydraulic cylinder body, a plurality of upper hydraulic cavities are arranged at the upper part in the hydraulic cylinder body, the axial direction of each upper hydraulic cavity is respectively parallel to the axial direction of the hydraulic cylinder body, an upper piston is respectively arranged in each upper hydraulic cavity, the top parts of the upper pistons are respectively connected with an upper piston rod, the upper piston rods respectively penetrate out of the top parts of the hydraulic cylinder body, the upper end of each upper piston rod is commonly connected with an upper connecting plate, an upper spring is connected between the upper connecting plate and the upper end of the hydraulic cylinder body and sleeved outside each upper piston rod, a lower hydraulic cavity is arranged at the lower part in the hydraulic cylinder body, the lower end of each upper hydraulic cavity is respectively communicated with the top part of the lower hydraulic cavity, the radial cross-sectional area of the lower hydraulic cavity is larger than the sum of the radial cross-sectional areas of the upper hydraulic cavities, the lower end of the lower piston rod is connected with a lower connecting plate, a lower spring is connected between the lower connecting plate and the lower end of the hydraulic cylinder, the lower spring is sleeved outside the lower piston rod, one side of the hydraulic cylinder is provided with a first opening corresponding to the upper part of each upper hydraulic cavity, one end of the first opening is communicated into the outer cylinder, the other end of the first opening is communicated with the upper part of each upper hydraulic cavity, the other side of the hydraulic cylinder is provided with a second opening corresponding to the lower part of the lower hydraulic cavity, one end of the second opening is communicated into the outer cylinder, and the other end of the second opening is communicated to the lower part of the lower hydraulic cavity.

The telescopic shock absorber for the automobile suspension is characterized in that: the upper hydraulic cavity is circumferentially and uniformly distributed on the upper part in the hydraulic cylinder body.

The telescopic shock absorber for the automobile suspension is characterized in that: the center of the bottom of the upper connecting plate is connected with a connecting shaft, the center of the upper end of the hydraulic cylinder is provided with a circular groove, a rubber body is arranged in the circular groove, and the lower end of the connecting shaft extends into the circular groove and is connected with the rubber body into a whole.

The telescopic shock absorber for the automobile suspension is characterized in that: the improved rubber sealing device is characterized in that an upper pressing plate and a lower pressing plate are fixed in the circular groove, wherein the lower pressing plate is located at the bottom of the circular groove, the upper pressing plate is located at the notch of the circular groove, the rubber body is fixedly connected between the upper pressing plate and the lower pressing plate, the side wall of the rubber body is fixed with the inner wall of the circular groove into a whole, and the lower end of the connecting shaft is fixedly connected to the upper pressing.

According to the invention, when the part connected with the upper connecting plate generates high-frequency low-amplitude vibration, the low-amplitude vibration can be quickly attenuated through the rubber body connected with the connecting shaft, the upper spring and the hydraulic medium in the hydraulic cylinder, so that the influence of the vibration on the connecting part of the lower connecting plate is reduced.

When the part connected with the upper connecting plate generates low-frequency high-amplitude vibration, the upper piston rod and the upper piston move linearly to a large extent, so that hydraulic medium in the upper hydraulic cavity enters the lower hydraulic cavity, and the cross-sectional area of the lower hydraulic cavity is larger than the sum of the cross-sectional areas of the upper hydraulic cavities, so that the linear motion amplitude of the lower piston in the lower hydraulic cavity is reduced compared with that of the upper piston, and the influence of the vibration on the connecting part of the lower connecting plate can be reduced.

Compared with the prior art, the invention can quickly attenuate low-frequency large-amplitude vibration and improve the damping effect of the damper.

Drawings

FIG. 1 is a block diagram of the present invention.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

As shown in fig. 1, a tubular shock absorber for automotive suspension, including the axial vertical hydraulic cylinder 1, the coaxial suit of 1 outer wall of hydraulic cylinder is fixed with outer barrel 2, and upper portion is equipped with a plurality of hydraulic chamber 3 on in the hydraulic cylinder 1, goes up hydraulic chamber 3 and is hoop evenly distributed in upper portion in hydraulic cylinder 1. Each upper hydraulic cavity 3 is axially parallel to the axial direction of the hydraulic cylinder 1, an upper piston 4 is arranged in each upper hydraulic cavity 3, the top of each upper piston 4 is connected with an upper piston rod 5, the upper piston rods 5 respectively penetrate out of the top of the hydraulic cylinder 1, the upper ends of the upper piston rods 5 are commonly connected with an upper connecting plate 6, an upper spring 7 is connected between the upper connecting plate 6 and the upper end of the hydraulic cylinder 1, the upper spring 7 is sleeved outside each upper piston rod 5, a lower hydraulic cavity 8 is arranged at the inner lower part of the hydraulic cylinder 1, the lower end of each upper hydraulic cavity 3 is respectively communicated with the top of the lower hydraulic cavity 8, the radial cross-sectional area of the lower hydraulic cavity 8 is larger than the sum of the radial cross-sectional areas of the upper hydraulic cavities 3, a lower piston 9 is arranged in the lower hydraulic cavity 8, the bottom of the lower piston 9 is connected with a lower piston rod 10, the lower piston rod 10 penetrates out of the bottom of the hydraulic cylinder 1, the lower end, a lower spring 12 is connected between the lower connecting plate 11 and the lower end of the hydraulic cylinder 1, the lower spring 12 is sleeved outside the lower piston rod 10, a first opening 13 is arranged at one side of the hydraulic cylinder 1 corresponding to the upper part of each upper hydraulic cavity 3, one end of the first opening 13 is communicated to the inside of the outer cylinder 2, the other end of the first opening 13 is communicated with the upper part of each upper hydraulic cavity 3, a second opening 14 is arranged at the other side of the hydraulic cylinder 1 corresponding to the lower part of the lower hydraulic cavity 8, one end of the second opening 14 is communicated to the inside of the outer cylinder 2, and the other end of the second opening 14 is communicated to the lower part of the lower hydraulic cavity 8, so that the upper hydraulic cavity 3, the lower hydraulic cavity 8 and the outer cylinder 2 in the hydraulic cylinder 1 form a communicating cavity, and a hydraulic medium is arranged.

The center of the bottom of the upper connecting plate 6 is connected with a connecting shaft 15, the center of the upper end of the hydraulic cylinder body 1 is provided with a circular groove, a rubber body 16 is arranged in the circular groove, an upper pressure plate and a lower pressure plate are fixed in the circular groove, wherein the lower pressure plate 17 is positioned at the bottom of the circular groove, the upper pressure plate 18 is positioned at the notch of the circular groove, the rubber body 16 is fixedly connected between the upper pressure plate 18 and the lower pressure plate 17, the side wall of the rubber body 16 and the inner wall of the circular groove are fixed into a whole, and the lower end of.

When the upper connecting plate moves downwards, the upper piston rod drives the upper piston to move downwards in the upper hydraulic cavity, so that hydraulic media in each upper hydraulic cavity enter the lower hydraulic cavity, the radial sectional areas of the upper hydraulic cavities are the same, and the downward movement distances of the upper pistons are the same.

The hydraulic medium enters the lower hydraulic cavity to enable the lower piston to move downwards, and the radial sectional area of the lower hydraulic cavity is far larger than the sum of the radial sectional areas of the upper hydraulic cavities, and the volume of the hydraulic medium entering the lower hydraulic cavity is the sum of the volumes of the hydraulic medium discharged by the upper hydraulic cavities, so that the distance of downward movement of the lower piston is far smaller than the distance of downward movement of the upper piston, and the downward movement is attenuated through the diameter-variable hydraulic cavity. Finally, the hydraulic medium below the lower piston is pressed into the outer cylinder by the lower piston and flows back to the upper hydraulic cavity through the outer cylinder.

When the upper connecting plate moves upwards, the upper piston rod drives the upper pistons to move upwards in the upper hydraulic cavities, so that hydraulic media in the upper hydraulic cavities enter the outer cylinder body and flow into the lower hydraulic cavities through the outer cylinder body, the lower pistons move upwards, and the distance of the upward movement of the lower pistons is far smaller than that of the upward movement of the upper pistons, so that the upward movement can be attenuated.

The embodiments of the present invention are described only for the preferred embodiments of the present invention, and not for the limitation of the concept and scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall into the protection scope of the present invention, and the technical content of the present invention which is claimed is fully set forth in the claims.