Inflatable hydraulic damping rod

Abstract

The utility model relates to the technical field of automobile damping, in particular to an inflatable hydraulic damping rod which comprises a cylinder body, a floating piston and a piston are arranged in the cylinder body in a sliding mode, two hydraulic oil communication holes are formed in the piston, a piston rod is arranged on the piston, and the piston rod and the end of the cylinder body are arranged in a sealing and sliding mode. A guide ring is arranged on the outer wall of the piston, and a liquid oil groove is formed in the guide ring. According to the utility model, firstly, the resistance can be adjusted by filling or discharging high-pressure gas; secondly, liquid oil can be injected between the outer wall of the guide ring and the inner wall of the cylinder body through the liquid oil groove to reduce friction force and heat productivity between the guide ring and the cylinder body, so that the abrasion loss of the guide ring is reduced; in addition, the characteristic that the front section of the conical spring is soft and the rear section of the conical spring is hard is utilized, and vehicle parts are well protected. The utility model has a reasonable and compact structure, and can reduce the heeling phenomenon of the automobile when the automobile turns, relieve the carsickness of passengers and ensure the stable running of the automobile.

Description

TECHNICAL FIELD

[0001] The utility model relates to automobile shock absorbing technical field more specifically, it relates to an inflatable hydraulic damping rod. BACKGROUND

[0002] In the process of automobile driving, in order to accelerate the attenuation of frame and body vibration, to improve the ride comfort of automobile, the chassis of automobile is usually installed with horizontal balance damping rod. However, the existing horizontal balance damping rod is a steel pole, cannot realize flexible damping, and the size of resistance cannot be adjusted, cannot be adjusted according to the weight of different automobiles, and is inconvenient to use.

[0003] Therefore, the patent with the publication number CN219366668U discloses a damping rod, which is filled with high-pressure gas into the cylinder body, and then the size of resistance can be adjusted. However, the damping rod has the following shortcomings in the process of use: (1) under complex road conditions, high-frequency reciprocating friction occurs between the piston and the cylinder body, the cylinder body heats up seriously, the friction between the guide ring on the piston and the inner wall of the cylinder body increases, and the guide ring wears out, which affects the service life of the damping rod. (2) during the whole compression process of the damping rod, the damping gradually increases, but the increment of damping is relatively linear, so that the damping feeling of the damping rod is either hard or soft, and the effect of soft in the front and hard in the rear cannot be realized, and the vehicle parts cannot be well protected. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an inflatable hydraulic damping rod to solve at least one technical problem in the background art.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] An inflatable hydraulic damping rod, comprising a cylinder body, a floating piston for sealing and separating the internal space of the cylinder body into a gas cavity and a liquid oil cavity is slidably arranged in the cylinder body, a piston for separating the liquid oil cavity into a first liquid cavity and a second liquid cavity is slidably arranged in the cylinder body, two liquid oil communication holes for communicating the first liquid cavity and the second liquid cavity are formed in the piston, a piston rod is arranged on the piston, and the piston rod and the end of the cylinder body are sealingly and slidably arranged; a guide ring is arranged on the outer wall of the piston, and a liquid oil groove for conveying liquid oil between the outer wall of the guide ring and the inner wall of the cylinder body to improve the service life of the guide ring is formed in the guide ring.

[0007] Optionally, a valve core for inflating or exhausting the gas cavity is arranged at the rear end of the cylinder body, and the piston rod and the front end of the cylinder body are sealingly and slidably arranged.

[0008] Optionally, a cylindrical spring is arranged in the second liquid cavity and sleeved on the piston rod; one end of the cylindrical spring abuts against the piston, and the other end of the cylindrical spring abuts against the inner wall of the front end of the cylinder body.

[0009] Optionally, the front end and the rear end of the piston are provided with restoring valves.

[0010] Optionally, a conical spring is arranged in the gas cavity; the thick end of the conical spring abuts against the floating piston, and the thin end of the conical spring abuts against the inner wall of the rear end of the cylinder body.

[0011] Optionally, the floating piston and the piston are sealingly connected with the cylinder body through sealing rings.

[0012] In conclusion, the utility model has the following beneficial effects: by opening the liquid oil groove on the guide ring, liquid oil can enter between the outer wall of the guide ring and the inner wall of the cylinder body, the friction and the heat generation between the two are reduced, the wear of the guide ring is reduced, and the service life of the damping rod is prolonged. In addition, the characteristics of the conical spring that the front section is soft and the rear section is hard hinder the floating piston from compressing the volume of the gas cavity, so that the front section is soft and the rear section is hard during the compression of the piston rod, the use comfort of the vehicle is improved, and the vehicle parts are better protected. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the structural schematic diagram of the utility model;

[0014] Figure 2 is the sectional view of the utility model;

[0015] Figure 3 is the local structural schematic diagram of the utility model;

[0016] Figure 4 is Figure 2 is the enlarged schematic diagram of the A area. DETAILED DESCRIPTION

[0017] In order to make the purpose, characteristics and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in combination with the drawings. The drawings show several embodiments of the utility model. However, the utility model can be realized in many different forms, and is not limited to the embodiments described herein.

[0018] The utility model is described in detail below in combination with the drawings and embodiments.

[0019] The utility model provides a kind of inflatable hydraulic damping rod, such as Figures 1-4As shown, including the cylinder 1, the cylinder 1 is provided with a floating piston 2 for sealing the internal space of the cylinder 1 into a gas cavity 11 and a liquid oil cavity 12, the cylinder 1 is provided with a piston 3 for separating the liquid oil cavity 12 into a first liquid cavity 121 and a second liquid cavity 122, the piston 3 is provided with two liquid oil communication holes 31 for communicating the first liquid cavity 121 and the second liquid cavity 122, the piston 3 is provided with a piston rod 4, the piston rod 4 is sealingly and slidingly arranged with the end of the cylinder 1; the outer wall of the piston 3 is provided with a guide ring 32, the guide ring 32 is provided with a liquid oil groove 321 for conveying liquid oil between the outer wall and the inner wall of the cylinder 1 to improve the service life of the guide ring 32.

[0020] Specifically, the rear end of the cylinder 1 is sealed by a sealing end cover in the art, and the front end is sealed by an oil storage cover in the art; the front end of the piston rod 4 penetrates the oil storage cover and is sealingly and slidingly connected with the oil storage cover, and the rear end of the piston rod 4 penetrates the piston 3 and is fixedly connected with the piston 3 through a nut. The gas cavity 11 is filled with high-pressure compressed gas, and the liquid oil cavity 12 is filled with liquid oil (hydraulic oil); when the piston 3 slides forward and backward, the liquid oil in the first liquid cavity 121 and the liquid oil in the second liquid cavity 122 flow into each other through the liquid oil communication hole 31, thereby changing the relative volume of the first liquid cavity 121 and the second liquid cavity 122. The guide ring 32 plays a supporting and guiding role, prevents the piston 3 from directly contacting and rubbing with the cylinder 1 during movement, and protects the cylinder 1 and the piston 3 from being damaged; the inner ring of the guide ring 32 is arranged on the outer wall of the piston 3, and the outer ring is attached to the inner wall of the cylinder 1; the liquid oil groove 321 is inclined or vertically arranged on the outer ring of the guide ring 32, and the groove depth is less than one third of the radial thickness of the guide ring 3; the number of liquid oil grooves 321 can be set as needed, which is generally related to its diameter, the larger the diameter, the more the number, and it is preferably arranged at equal intervals. During the reciprocating sliding of the piston 3, liquid oil can enter between the outer wall of the guide ring 32 and the inner wall of the cylinder 1 through the liquid oil groove 321, thereby reducing the friction and heat generation between the two, and further reducing the wear of the guide ring 32 and improving the service life of the damping rod.

[0021] Further, the rear end of the cylinder 1 is provided with a valve core 5 for charging or discharging the gas cavity 11, and the piston rod 4 is sealingly and slidingly arranged with the front end of the cylinder 1.

[0022] As shown in the drawings, Figure 2 The valve core 5 is screwed in the sealing end cover at the rear end of the cylinder 1 by threaded connection, and the specific cooperation structure of the valve core 5 and the sealing end cover refers to the structure of the valve nozzle on the truck inner tube. The valve core 5 realizes charging and discharging of the gas cavity 11 to adjust the internal pressure, realizes adjustment of the resistance, has the advantages of convenient and flexible use.

[0023] Furthermore, a cylindrical spring 6 sleeved on the piston rod 4 is placed in the second liquid chamber 122; one end of the cylindrical spring 6 abuts against the piston 3, and the other end abuts against the inner wall of the front end of the cylinder 1.

[0024] like Figures 2-4 As shown, the front end of the cylindrical spring 6 abuts against the oil reservoir cap located at the front end of the cylinder 1, and its rear end directly or indirectly abuts against the piston 3. When the piston rod 4 extends forward, the piston 3 compresses the cylindrical spring 6; when the piston rod 4 retracts into the cylinder 1, the cylindrical spring 6 quickly releases its elastic potential energy to push the piston 3 to slide towards the floating piston 2, thereby improving the responsiveness of the damping rod.

[0025] Furthermore, the piston 3 is equipped with a recovery valve 7 at both its front and rear ends.

[0026] like Figure 4 As shown, the rear end of the piston rod 4 is provided with an external thread adapted to the nut. It passes sequentially through the return valve 7 located at the front end of the piston 3, the piston 3, and the return valve 7 located at the rear end of the piston 3 before connecting to the nut. The return valve 7 controls the flow direction of the hydraulic oil. When the piston 3 slides towards the rear end of the cylinder 1, the return valve 7 located at the rear end of the piston 3 deforms and blocks the hydraulic oil connecting hole 31 located at the top of the piston 3, but does not block the hydraulic oil connecting hole 31 located at the bottom of the piston 3, so that the hydraulic oil in the first hydraulic chamber 121 enters the second hydraulic chamber 122 from the hydraulic oil connecting hole 31 located at the bottom of the piston 3; when the piston 3 slides towards the front end of the cylinder 1, the return valve 7 located at the front end of the piston 3 deforms and blocks the hydraulic oil connecting hole 31 located at the bottom of the piston 3, but does not block the hydraulic oil connecting hole 31 located at the top of the piston 3, so that the hydraulic oil in the second hydraulic chamber 122 enters the first hydraulic chamber 121 from the hydraulic oil connecting hole 31 located at the top of the piston 3. The dual-restoration valve 7 design ensures that the damping rod provides a smooth and continuous damping feel with minimal play during the switching between compression and extension states of the piston rod 4.

[0027] Furthermore, a conical spring 8 is placed inside the gas chamber 11; the thick end of the conical spring 8 abuts against the floating piston 2, and its thin end abuts against the inner wall of the rear end of the cylinder 1.

[0028] like Figure 2 As shown, the conical spring 8 is located within the gas chamber 11, and it is used to increase the resistance to the sliding of the floating piston 2 towards the rear end of the cylinder 1. The conical spring 8 has a non-constant K value; the K value is approximately constant in the initial compression stage, and gradually increases in the later compression stage, making the conical spring 8 exhibit a softer initial stage and a harder later stage characteristic.

[0029] Further, the piston rod 4 also realizes the effect of soft front and hard rear during compression; the soft front is beneficial to obtain larger compression stroke, thereby improving the comfort of using the vehicle; the hard rear is beneficial to hinder the rigid "bottoming out" phenomenon of the piston rod 4, can better protect the structure of the damping rod itself, reduce the vehicle roll phenomenon, and protect the vehicle parts.

[0030] Further, the floating piston 2 and the piston 3 are both sealed and connected with the cylinder body 1 through the sealing ring 9.

[0031] As shown in Figures 2-4 the outer wall of the floating piston 2 and the piston 3 is provided with an annular groove, and the sealing ring 9 is sleeved on the annular groove. The sealing ring 9 is an O-shaped sealing ring, which can prevent gas-liquid mutual mixing and liquid-liquid mutual mixing, and provides protection for the stable performance of the damping rod.

[0032] The preferred embodiments of the utility model are described above, the protection scope of the utility model is not only limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the utility model belong to the protection scope of the utility model. It should be pointed out that, for ordinary skilled persons in the art, some improvements and decorations without departing from the principle of the utility model can also be considered as the protection scope of the utility model.

Claims

1. An inflatable hydraulic damping rod, characterized by, The application relates to a cylinder, which comprises a cylinder body, a floating piston arranged in the cylinder body and used for sealingly separating the internal space of the cylinder body into a gas cavity and a liquid oil cavity, a piston arranged in the cylinder body and used for sealingly separating the liquid oil cavity into a first liquid cavity and a second liquid cavity, two liquid oil communication holes arranged on the piston and used for communicating the first liquid cavity and the second liquid cavity, a piston rod arranged on the piston and sealingly and slidably arranged at the end of the cylinder body, a guide ring arranged on the outer wall of the piston, and a liquid oil groove arranged on the guide ring and used for conveying liquid oil between the outer wall of the guide ring and the inner wall of the cylinder body to prolong the service life of the guide ring.

2. The inflatable hydraulic damping rod of claim 1, wherein, The rear end of the cylinder body is provided with a valve core used for inflating or exhausting the gas cavity, and the piston rod is sealingly and slidably arranged at the front end of the cylinder body.

3. The inflatable hydraulic damping rod of claim 1, wherein, A cylindrical spring is arranged in the second liquid cavity and sleeved on the piston rod; one end of the cylindrical spring abuts against the piston, and the other end of the cylindrical spring abuts against the inner wall of the front end of the cylinder body.

4. The inflatable hydraulic damping rod of claim 1, wherein, The front end and the rear end of the piston are both provided with a restoring valve.

5. The inflatable hydraulic damping rod of claim 1, wherein, A conical spring is arranged in the gas cavity; the thick end of the conical spring abuts against the floating piston, and the thin end of the conical spring abuts against the inner wall of the rear end of the cylinder body.

6. The inflatable hydraulic damping rod of claim 1, wherein, The floating piston and the piston are both sealingly connected with the cylinder body through sealing rings.

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