CN220268301U

CN220268301U - Primary and secondary bumper shock absorber

Info

Publication number: CN220268301U
Application number: CN202321781438.9U
Authority: CN
Inventors: 华佳锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-07-07
Filing date: 2023-07-07
Publication date: 2023-12-29
Anticipated expiration: 2033-07-07

Abstract

The utility model belongs to the technical field of shock absorbers, in particular to a primary-secondary shock absorber, which is provided with a primary shock absorber and a secondary shock absorber in an outer cylinder barrel, wherein the primary shock absorber comprises an upper piston, a lower piston and a damping spring, the upper piston can be arranged on a piston rod in a floating way up and down, a damping through hole is arranged in the upper piston, the lower piston is fixedly arranged on the piston rod, the damping spring is sleeved on the piston rod at a position between the upper piston and the lower piston, damping media are respectively arranged in a space between an oil seal and the upper piston and a space between the upper piston and the lower piston, the primary shock absorber is an elastic part arranged at the bottom of the lower piston, and when the piston rod is pressed, the primary shock absorber and the secondary shock absorber simultaneously play a role in shock absorption, so that the shock absorption capacity is stronger, and the shock absorption effect is better under the same thickness condition, thereby being beneficial to reducing the cost of the damping shock absorber.

Description

Primary and secondary bumper shock absorber

Technical Field

The utility model belongs to the technical field of shock absorbers, and particularly relates to a primary-secondary shock absorber.

Background

The hydraulic damper is a common damping part in battery cars and various other vehicles or mechanical equipment, and generally comprises an outer cylinder barrel and a piston rod, wherein an oil seal, a piston and damping medium are arranged in a working cavity of the outer cylinder barrel, when the piston rod is pressed to move so as to drive the piston to move, the piston extrudes the damping medium in the working cavity, so that the upper side space and the lower side space of the piston in the working cavity are changed, and the damping medium is driven to slowly pass through a flow hole in the piston to play a role in damping and damping. The existing hydraulic damper has the problem of insufficient damping capacity, generally if the effect of enough buffering and damping is to be achieved, the damper needs to be thicker, so that the cost of the damper is higher, and thicker dampers are inconvenient to install on installation positions of some devices.

Disclosure of Invention

The utility model aims to provide a primary-secondary shock absorber, which solves the technical problem that the shock absorber in the prior art is poor in shock absorption effect.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the primary-secondary shock absorber comprises an outer cylinder barrel, wherein a piston rod is arranged in the outer cylinder barrel, an oil seal is arranged between the upper part of the piston rod and the outer cylinder barrel, the primary shock absorber further comprises a primary shock absorber and a secondary shock absorber, the primary shock absorber comprises an upper piston, a lower piston and a damping spring, the upper piston can be arranged on the piston rod in a floating mode up and down, a damping through hole is formed in the upper piston, the lower piston is fixedly arranged on the piston rod, and the damping spring is sleeved on the piston rod and located at a position between the upper piston and the lower piston; the space inside the outer cylinder between the oil seal and the upper piston is a first damping space, the space inside the outer cylinder between the upper piston and the lower piston is a second damping space, and damping media are arranged in the first damping space and the second damping space; the sub damping device is an elastic component arranged at the bottom of the lower piston.

Preferably, the elastic member is a spring.

Preferably, a connecting ring is arranged at the bottom of the outer cylinder.

Preferably, the sealing device further comprises a sealing piece embedded at the inner top of the outer cylinder barrel.

Preferably, the outer diameter of the outer cylinder is 24mm.

Preferably, the upper part of the piston rod is provided with a thread section.

Preferably, the length of the elastic component is 50% -70% of the total length of the outer cylinder.

Preferably, the damping medium is damping oil.

Compared with the prior art, the utility model has the beneficial effects that: this primary and secondary bumper shock absorber is equipped with primary and secondary damping device and primary damping device in outer cylinder, primary and secondary damping device includes the upper piston, lower piston, damping spring, the upper piston can reciprocate set up on the piston rod, be equipped with the damping through-hole in the upper piston, lower piston is fixed to be set up on the piston rod, damping spring cover is established and is located the position between upper piston and the lower piston on the piston rod, space between oil blanket and the upper piston and space between upper piston and the lower piston all are equipped with damping medium, primary damping device is the elastomeric element of setting in lower piston bottom, when the piston rod is pressed, primary damping device and primary damping device play the cushioning effect simultaneously, shock-absorbing capacity is stronger, under the same thick and thin circumstances, the shock attenuation effect is better, be favorable to reducing the cost of damping bumper shock absorber.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of a primary-secondary shock absorber according to an embodiment of the present utility model.

FIG. 2 is an exploded view of one embodiment of a primary and secondary shock absorber of the present utility model.

FIG. 3 is a schematic view illustrating an internal structure of an embodiment of the primary-secondary damper of the present utility model.

Fig. 4 is an enlarged view of a portion a of fig. 3.

In the drawings, each reference numeral is intended to: the piston rod comprises an outer cylinder barrel 1, a piston rod 2, an oil seal 21, an upper piston 22, a lower piston 23, a damping spring 24, a first damping space 25, a second damping space 26, a threaded section 27, a sealing plate 28 and a spring 3.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In one embodiment, as shown in fig. 1, a primary-secondary shock absorber is provided, the primary-secondary shock absorber comprises an outer cylinder 1, the outer cylinder 1 is a cylinder, a piston rod 2 is arranged in the outer cylinder 1, the upper part of the piston rod 2 is positioned outside the outer cylinder 1, an oil seal 21 is arranged between the upper part of the piston rod 2 and the outer cylinder 1, a hole for the piston rod 2 to pass through is arranged in the middle part of the oil seal 21, the oil seal is fixed at the inner top part of the outer cylinder 1, the hole wall in the middle part of the oil seal 21 is in sealing contact with the outer wall of the piston rod 2, the upper port of the outer cylinder 1 is sealed by the oil seal 21, and damping medium in the outer cylinder 1 is prevented from flowing out.

As shown in fig. 2, the primary-secondary shock absorber further comprises a primary shock absorber and a secondary shock absorber, the primary shock absorber and the secondary shock absorber are combined together to play a role in shock absorption, wherein the primary shock absorber comprises an upper piston 22, a lower piston 23 and a damping spring 24, a hole for a piston rod 2 to pass through is formed in the middle of the upper piston 22, a plurality of damping through holes are formed in the upper piston 22, the upper piston 22 is sleeved on the piston rod 2 and then can float up and down along the piston rod 2, the lower piston 23 is fixed at the bottom of the piston rod 2, the damping spring 24 is sleeved on the piston rod 2 and is positioned between the upper piston 22 and the lower piston 23, and the damping spring 24 can enable the upper piston 22 to be at a certain height to prevent the upper piston 22 from falling onto the lower piston 23 due to dead weight and not achieving the role in shock absorption.

As shown in fig. 3, a space between an oil seal 21 and an upper piston 22 inside an outer cylinder 1 of the primary-secondary shock absorber is a first shock absorbing space 25, a space between the upper piston 22 and a lower piston 23 inside the outer cylinder 1 is a second shock absorbing space 26, and damping media are arranged in the first shock absorbing space 25 and the second shock absorbing space 26, wherein the damping media are damping oil.

The sub-damping device of the sub-and-main damper is an elastic component arranged at the bottom of the lower piston 23, as shown in fig. 3, in this embodiment, the elastic component specifically adopts a spring 3, the bottom of the spring 3 is supported at the inner bottom surface of the outer cylinder 1, and the top of the spring 3 is supported at the bottom surface of the lower piston 23.

The working mode of the primary-secondary shock absorber is as follows: taking the primary-secondary shock absorber as an example for the front fork of the electric vehicle, the bottom of the outer cylinder barrel 1 is connected to the wheel shaft of the wheel, the upper end of the piston rod 2 is connected to the rotating handle frame, when the piston rod 2 is subjected to downward pressure, the piston rod 2 presses the lower piston 23 to move downwards, the oil seal 21 is not moved, the upper piston 22 also can not move downwards immediately, so that the second shock absorption space 26 between the upper piston 22 and the lower piston 23 is suddenly increased to form negative pressure, and damping medium in the first shock absorption space 25 between the oil seal 21 and the upper piston 22 flows to the second shock absorption space 26 through a damping through hole in the upper piston 22 to play a role of shock absorption; meanwhile, when the piston rod 2 is pressed by downward pressure to move the piston 23 downwards, the spring 3 is compressed to play a role in buffering, so that the child damping device and the parent damping device play a role in damping at the same time, and a better damping effect is achieved. When the piston rod 2 is pressed and moved to the lowest position, the rebound force of the spring 3 is larger than the downward pressure applied to the piston rod 2, the lower piston 23 is rebounded by the spring 3, so that the first damping space 25 between the oil seal 21 and the upper piston 22 is enlarged to form negative pressure, damping medium in the second damping space 26 between the upper piston 22 and the lower piston 23 flows to the first damping space 25 through the damping through hole in the upper piston 22, and the damping effect is achieved, and jolt caused by rebound of the spring 3 is avoided.

Further, as shown in fig. 1, a connecting ring 11 is arranged at the bottom of an outer cylinder barrel 1 of the primary-secondary shock absorber, and a threaded section 27 is arranged at the upper part of a piston rod 2, so that the upper end and the lower end of the primary-secondary shock absorber are conveniently connected with corresponding parts on equipment such as an electric bicycle.

Further, as shown in fig. 2 and 4, the primary-secondary shock absorber further comprises a sealing piece 28 embedded in the inner top of the outer cylinder 1, the sealing piece 28 is pressed by the top closing of the outer cylinder 1, the sealing piece 28 is prevented from being separated, and the sealing piece 28 is pressed on the upper side of the oil seal.

Further, the outer diameter of the outer cylinder barrel 1 of the primary-secondary shock absorber is 24mm, and as the primary-secondary shock absorber and the primary-secondary shock absorber are arranged in the outer cylinder barrel, the shock absorption effect is equivalent to that of the existing damper with the outer diameter of the cylinder barrel being 32mm, and the cost of the shock absorber is reduced.

Further, the length of the elastic part of the primary-secondary shock absorber is 50% -70% of the total length of the outer cylinder, so that a good shock absorption effect can be achieved.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a primary and secondary bumper shock absorber, includes outer cylinder, be equipped with the piston rod in the outer cylinder, piston rod upper portion with be equipped with the oil blanket between the outer cylinder, its characterized in that: the damping device comprises a piston rod, a damping spring, a main damping device and a secondary damping device, wherein the damping spring is sleeved on the piston rod and is positioned between the upper piston and the lower piston; the space inside the outer cylinder between the oil seal and the upper piston is a first damping space, the space inside the outer cylinder between the upper piston and the lower piston is a second damping space, and damping media are arranged in the first damping space and the second damping space; the sub damping device is an elastic component arranged at the bottom of the lower piston.

2. The primary and secondary shock absorber according to claim 1, wherein: the elastic component is a spring.

3. The primary and secondary shock absorber according to claim 1, wherein: the bottom of the outer cylinder is provided with a connecting ring.

4. The primary and secondary shock absorber according to claim 1, wherein: the sealing piece is embedded at the inner top of the outer cylinder barrel.

5. The primary and secondary shock absorber according to claim 1, wherein: the outer diameter of the outer cylinder is 24mm.

6. The primary and secondary shock absorber according to claim 1, wherein: the upper part of the piston rod is provided with a thread section.

7. The primary and secondary shock absorber according to claim 1, wherein: the length of the elastic part is 50% -70% of the total length of the outer cylinder.

8. The primary and secondary shock absorber according to claim 1, wherein: the damping medium is damping oil.