阅读说明：本技术 一种液压阻尼器 (Hydraulic damper ) 是由 应端忠 于 2019-07-16 设计创作，主要内容包括：一种液压阻尼器：活塞杆总成中活塞杆拉头和活塞杆本体左端固连,中间密封件上设有过油孔,左隔板右端的中部和右隔板左端中部向外凸起,左隔板、左弹性挡片、中间密封件、右弹性挡片、右隔板从左到右套置并被锁紧螺母锁固在活塞杆本体右端上,左弹性挡片、右弹性挡片盖住过油孔。工作缸总成由左堵头、工作缸本体、中堵头、弹簧、弹簧定位座、工作缸弹性挡片、右堵头、气囊相连构成。储油缸总成由左封头、储油缸主体、自润滑套筒、储油缸拉头、左封头大密封圈、左封头小密封圈相连构成。活塞杆拉头位于左封头的左侧面外,活塞杆本体右端位于工作缸本体内；中间密封件和工作缸本体滑动密封相连。优点：具结构简单、工作可靠、使用寿命长。(A hydraulic damper: a piston rod pull head in the piston rod assembly is fixedly connected with the left end of a piston rod body, an oil passing hole is formed in a middle sealing piece, the middle of the right end of a left partition plate and the middle of the left end of a right partition plate protrude outwards, the left partition plate, a left elastic separation blade, the middle sealing piece, a right elastic separation blade and the right partition plate are sleeved from left to right and locked on the right end of the piston rod body by a locking nut, and the left elastic separation blade and the right elastic separation blade cover the oil passing hole. The working cylinder assembly is formed by connecting a left plug, a working cylinder body, a middle plug, a spring positioning seat, a working cylinder elastic separation blade, a right plug and an air bag. The oil storage cylinder assembly is formed by connecting a left end socket, an oil storage cylinder main body, a self-lubricating sleeve, an oil storage cylinder pull head, a left end socket large sealing ring and a left end socket small sealing ring. The piston rod pull head is positioned outside the left side surface of the left end socket, and the right end of the piston rod body is positioned in the working cylinder body; the middle sealing element is connected with the working cylinder body in a sliding and sealing mode. The advantages are that: the device has simple structure, reliable work and long service life.)

1. A hydraulic damper characterized by: comprises a piston rod assembly, a working cylinder assembly and an oil storage cylinder assembly;

the piston rod assembly comprises a piston rod body; the diameter of the left end of the piston rod body is smaller than or equal to that of the middle end of the piston rod body, and a piston rod pull head is fixedly connected to the left end of the piston rod body; the diameter of the right end of the piston rod body is smaller than that of the middle end of the piston rod body; the middle sealing piece is provided with a plurality of oil passing holes, the middle part of the right end of the left clapboard and the middle part of the left end of the right clapboard are outwards protruded, and the oil passing holes can not be shielded by the protrusions; the left partition plate, the left elastic baffle piece, the middle sealing piece, the right elastic baffle piece and the right partition plate are sleeved from left to right and are locked on the right end of the piston rod body by a locking nut; the left and right elastic blocking pieces cover the oil passing hole;

the working cylinder assembly comprises a working cylinder body and an air bag; the left plug is fixedly connected with the left end of the working cylinder body, and a through hole for the piston rod body to pass through is formed in the left plug; the left end of the middle plug is fixedly connected with the right end of the working cylinder body, and the right end of the middle plug is fixedly connected with the right plug; the right end of the middle plug is provided with a concave cavity, the left end of the middle plug is provided with a locking nut through hole communicated with the concave cavity, and the diameter of the locking nut through hole is smaller than the outer diameter of the right partition plate; the middle part of the right end of the spring positioning seat and the left end of the right plug are protruded outwards; the spring, the spring positioning seat and the elastic baffle of the working cylinder are arranged in the concave cavity from left to right; the left end of the spring abuts against the bottom of the cavity of the concave cavity, the right end of the spring abuts against the left end of the spring positioning seat, and the spring pushes the elastic blocking piece of the working cylinder against the left side surface of the right plug through the spring positioning seat so as to seal the central hole on the right plug; the air bag is fixedly arranged on the working cylinder body;

the oil storage cylinder assembly comprises an oil storage cylinder main body and a left end socket small sealing ring, the left end socket is arranged at the left end of the oil storage cylinder main body and is fixedly connected with the left end of the oil storage cylinder main body in a sealing manner, and a through hole for the piston rod body to pass through in a sliding fit manner and a left concave cavity for accommodating the left end socket small sealing ring connected with the piston rod body in a sliding sealing manner are formed in the left end socket; the oil storage cylinder pull head is fixedly connected with the right end of the oil storage cylinder main body in a sealing way;

the working cylinder assembly is arranged in the oil storage cylinder main body, the left plug abuts against the left sealing head, and the right plug abuts against the oil storage cylinder pulling head; the inner diameter of the oil storage cylinder main body is larger than the outer diameter of the working cylinder main body; the space enclosed by the oil storage cylinder main body and the working cylinder body is communicated with the central hole on the right plug;

the piston rod pull head is positioned outside the left side surface of the left end socket, and the right end of the piston rod body is positioned in the working cylinder body; the middle sealing element is connected with the working cylinder body in a sliding and sealing mode.

2. A hydraulic damper as set forth in claim 1 wherein: the left end of the oil storage cylinder main body (3.1) is in a bottle bottom shape with a hole at the bottom, the left end of the left seal head (3.2) is abutted against the right side face of the left end of the oil storage cylinder main body (3.1) in the bottle bottom shape, and a left seal head large sealing ring (3.5) is arranged between the outer cylindrical face of the left seal head (3.2) and the inner cylindrical face of the oil storage cylinder main body (3.1).

3. A hydraulic damper as set forth in claim 1 wherein: the left end of the left seal head (3.2) is fixedly provided with a self-lubricating sleeve (3.21), and the piston rod body (1.1) is in sliding fit with the self-lubricating sleeve (3.21) so as to realize the sliding fit of the piston rod body (1.1) and the left seal head (3.2).

4. A hydraulic damper as set forth in claim 1 wherein: and a third sealing ring (1.9) is arranged between the outer cylindrical surface of the middle sealing element (1.5) and the inner surface of the working cylinder body (2.1), and the third sealing ring (1.9) is fixed on the middle sealing element (1.5).

5. A hydraulic damper as set forth in claim 1 wherein: the right end of the locking nut (1.8) is fixedly provided with an anti-rotation piece (1.10) for preventing the locking nut (1.8) from loosening.

6. A hydraulic damper as set forth in claim 1 wherein: the spring (2.4) is a conical spring, the large end of the conical spring is positioned on the left side, and the left end of the spring positioning seat (2.5) is provided with a circular truncated cone-shaped positioning boss (2.51) protruding into the right end of the spring (2.4).

Technical Field

The invention relates to the technical field of dampers, in particular to a hydraulic damper.

Background

At present, the hydraulic damper is widely applied to the field of vibration resistance and shock absorption. The invention patent application No. 201810347161.6, application publication No. CN 108506404 a discloses a hydraulic damper: the piston comprises a right pin head, a right end cover, a cylinder body, a piston assembly, a piston rod, a left end cover, a left pin head and an auxiliary piston rod. The device adopts the mode that the damping flow channel is matched with the first flow channel, and the first flow channel comprises the first one-way valve and the second one-way valve, so that the low-speed friction resistance and the quick locking performance of the damper are realized. "the hydraulic damper has its own features, but also has its own disadvantages.

Disclosure of Invention

The invention mainly aims to provide a novel damper which consists of a recovery valve system and a compression valve system, wherein high pressure is generated in a cavity during working, and oil passes through a corresponding elastic baffle plate in a hard extrusion deformation mode instead of passing through a throttling groove.

The technical scheme adopted by the invention is as follows: a hydraulic damper: comprises a piston rod assembly, a working cylinder assembly and an oil storage cylinder assembly. The piston rod assembly comprises a piston rod body, a piston rod pull head, a left partition plate, a right partition plate, a middle sealing element, a left elastic separation blade, a right elastic separation blade and a locking nut. The working cylinder assembly comprises a working cylinder body, a left plug, a middle plug, a spring positioning seat, a working cylinder elastic separation blade, a right plug and an air bag. The oil storage cylinder assembly comprises an oil storage cylinder main body, a left end socket, an oil storage cylinder pull head and a left end socket small sealing ring;

the diameter of the left end of the piston rod body is smaller than or equal to the diameter of the middle end of the piston rod body, and the piston rod pull head is fixedly connected with the left end of the piston rod body. The diameter of the right end of the piston rod body is smaller than that of the middle end of the piston rod body. The middle sealing piece is provided with a plurality of oil passing holes, the middle part of the right end of the left partition plate protrudes rightwards, the middle part of the left end of the right partition plate protrudes leftwards, and the oil passing holes can not be shielded by the two protrusions. The left clapboard, the left elastic separation blade, the middle sealing element, the right elastic separation blade and the right clapboard are sleeved from left to right and are locked on the right end of the piston rod body by the locking nut. The left elastic baffle plate and the right elastic baffle plate cover the oil passing hole;

the left end cap is fixedly connected with the left end of the working cylinder body, and a through hole for the piston rod body to pass through is formed in the left end cap. The left end of the middle plug is fixedly connected with the right end of the working cylinder body, and the right end of the middle plug is fixedly connected with the right plug. The right end of the middle plug is provided with a concave cavity, and the left end of the middle plug is provided with a locking nut through hole communicated with the concave cavity. The diameter of the through hole of the locking nut is smaller than the outer diameter of the right partition plate. The middle part of the right end of the spring positioning seat protrudes outwards, the left end of the right plug protrudes outwards, and the outer diameter of the protruding middle part of the right end of the spring positioning seat is smaller than the inner diameter of the protruding left end of the right plug. The spring, the spring positioning seat and the elastic baffle of the working cylinder are arranged in the concave cavity from left to right. The left end of the spring abuts against the bottom of the cavity of the concave cavity, the right end of the spring abuts against the left end of the spring positioning seat, and the spring pushes the elastic blocking piece of the working cylinder against the left side surface of the right plug through the spring positioning seat so as to seal the central hole in the right plug. The air bag is fixedly arranged on the working cylinder body;

the left seal head is arranged at the left end of the oil storage cylinder main body and is fixedly connected with the left end of the oil storage cylinder main body in a sealing manner, and a through hole for the piston rod body to pass through in a sliding fit manner and a left concave cavity for accommodating a left seal head small sealing ring connected with the piston rod body in a sliding sealing manner are arranged on the left seal head. The oil storage cylinder pull head is fixedly connected with the right end of the oil storage cylinder main body in a sealing way;

the working cylinder assembly is arranged in the oil storage cylinder main body. The left plug abuts against the left sealing head, and the right plug abuts against the pull head of the oil storage cylinder; the inner diameter of the oil storage cylinder main body is larger than the outer diameter of the working cylinder main body; the space enclosed by the oil storage cylinder main body and the working cylinder body is communicated with the central hole on the right plug;

the piston rod pull head is positioned outside the left side surface of the left end socket, and the right end of the piston rod body is positioned in the working cylinder body; the middle sealing element is connected with the working cylinder body in a sliding and sealing mode.

The present invention has A, B, C three oil chambers in total, wherein the C oil chamber is defined by a space enclosed by the surfaces of the corresponding components of the reserve tube body and the working tube assembly. ' the middle sealing piece is provided with a plurality of oil passing holes, the middle part of the right end of the left partition plate protrudes rightwards, the left end of the right partition plate protrudes leftwards, and the oil passing holes can not be shielded by the two protrusions. That is, the distance between the outer cylindrical surfaces of the two bulges is smaller than the minimum distance between the cylindrical surfaces of the oil passing holes, so that the corresponding oil passages can be communicated by utilizing the elasticity of the left and right elastic baffle plates to obtain necessary deformation. When the piston rod body moved rightwards, the fluid in the B oil storage cavity can extrude and open left elastic catch piece, right elastic catch piece gets into the A oil storage cavity, but because partial volume of the piston rod body gets into the A oil storage cavity, will lead to the A oil storage cavity can not hold the fluid that the B oil storage cavity flows in completely, so B oil storage cavity part fluid will extrude working cylinder elastic catch piece and take place elastic deformation and get into the C oil storage cavity, and the C oil storage cavity is also full of fluid before, so the fluid that gets into the C oil storage cavity will compress the gasbag so that hold in. And when the piston rod body moved left, the fluid in the A oil storage cavity will extrude the orbit to get into left elastic catch, right elastic catch gets into B oil storage cavity, because the fluid volume that gets into B oil storage cavity this moment is less than the B oil storage cavity volume after the expansion, B oil storage cavity will produce the negative pressure, the fluid in the C oil storage cavity will push away working cylinder elastic catch and get into B oil storage cavity after with spring compression this moment, the former volume of gasbag recovery to accomplish a duty cycle. The invention is a novel damper which has novel and unique structure and allows oil not to pass through a throttling groove.

Preferably, the left end of the oil storage cylinder body is in a bottle bottom shape with a hole at the bottom, the left end of the left end enclosure abuts against the right side face of the left end of the oil storage cylinder body in the bottle bottom shape, and a left end enclosure large sealing ring is arranged between the outer cylindrical face of the left end enclosure and the inner cylindrical face of the oil storage cylinder body. This preferred scheme, simple structure is reasonable, and manufacturing is easy, and the installation effectiveness is high.

As preferred, the left end of the left end socket is fixedly provided with a self-lubricating sleeve, and the piston rod body is in sliding fit with the self-lubricating sleeve so as to realize the sliding fit of the piston rod body and the left end socket. According to the preferred scheme, the processing and manufacturing cost of the left end socket can be reduced, the using effect of the invention is improved, and the service life of the invention is prolonged.

Preferably, a third sealing ring is arranged between the outer cylindrical surface of the middle sealing part and the inner surface of the working cylinder body, and the third sealing ring is fixed on the middle sealing part. This preferred scheme can reduce the manufacturing degree of difficulty of middle sealing member, reduces middle sealing member and removes resistance, improves sealed effect and life.

Preferably, the right end of the locking nut is fixedly provided with an anti-rotation piece for preventing the locking nut from loosening. The anti-loosening structure of the optimal scheme is simple and reliable, and is novel and creative.

Preferably, the spring is a conical spring, the large end of the conical spring is positioned on the left side, and the left end of the spring positioning seat is provided with a circular truncated cone-shaped positioning boss protruding into the right end of the spring. In the preferred embodiment, the spring is easy to position and select.

In conclusion, the damper is a novel and unique damper, and oil does not pass through a throttling groove; has the advantages of simple structure, reliable work and long service life.

Drawings

FIG. 1: the invention has a structure schematic diagram.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

As shown in fig. 1, the present invention includes a piston rod assembly 1, a working cylinder assembly 2, and a reserve cylinder assembly 3;

the piston rod assembly 1 comprises a piston rod body 1.1, a piston rod pull head 1.2, a left partition plate 1.3, a right partition plate 1.4, a middle sealing element 1.5, a left elastic baffle plate 1.6, a right elastic baffle plate 1.7, a locking nut 1.8, a third sealing ring 1.9 and an anti-rotation plate 1.10;

the working cylinder assembly 2 comprises a working cylinder body 2.1, a left plug 2.2, a middle plug 2.3, a spring 2.4, a spring positioning seat 2.5, a working cylinder elastic baffle 2.6, a right plug 2.7 and an air bag 2.8;

the oil storage cylinder assembly 3 comprises an oil storage cylinder main body 3.1, a left end socket 3.2, a self-lubricating sleeve 3.21, an oil storage cylinder pull head 3.3, a left end socket large sealing ring 3.5 and a left end socket small sealing ring 3.4;

the diameter of the left end of the piston rod body 1.1 is smaller than that of the middle end of the piston rod body 1.1, and threads are arranged at the left end of the piston rod body. The left end of the piston rod pull head 1.2 is provided with a pull hole, the right end of the piston rod pull head 1.2 is provided with a threaded hole, and the right end of the piston rod pull head 1.2 is fixedly connected with the left end of the piston rod body 1.1 through threads. The diameter of the right end of the piston rod body 1.1 is smaller than that of the middle end of the piston rod body 1.1. The middle sealing piece 1.5 is provided with a plurality of oil passing holes 1.51, the middle part of the right end of the left clapboard 1.3 protrudes rightwards, the middle part of the left end of the right clapboard 1.4 protrudes leftwards, and the two protrusions can not shield the oil passing holes 1.51; the left clapboard 1.3, the left elastic baffle plate 1.6, the middle sealing element 1.5, the right elastic baffle plate 1.7 and the right clapboard 1.4 are sleeved from left to right and are locked on the right end of the piston rod body 1.1 by a locking nut 1.8; the left elastic baffle plate 1.6 and the right elastic baffle plate 1.7 cover the oil passing hole 1.51. The thickness of the anti-rotation piece 1.10 is equal to the thread pitch of the locknut 1.8, the anti-rotation piece is arranged in an anti-rotation piece fixing groove at the right end of the locknut 1.8, when the locknut 1.8 is rotated to move leftwards, the anti-rotation piece 1.10 can move leftwards along with the rotation, at the moment, the anti-rotation piece 1.10 can generate elastic deformation, and the looseness of the locknut 1.8 can be effectively prevented by utilizing the elastic deformation;

the left plug 2.2 is fixedly connected with the left end of the working cylinder body 2.1, and a through hole for the piston rod body 1.1 to pass through is formed in the left plug; the left end of the middle choke plug 2.3 is fixedly connected with the right end of the working cylinder body 2.1, and the right end of the middle choke plug is fixedly connected with the right choke plug 2.7; the right end of the middle plug 2.3 is provided with a concave cavity 2.31, the left end is provided with a locking nut through hole 2.32 communicated with the concave cavity 2.31, and the diameter of the locking nut through hole 2.32 is smaller than the outer diameter of the right partition plate 1.4; the middle part of the right end of the spring positioning seat 2.5 is convex, the left end of the right plug 2.7 is convex, and the outer diameter of the convex middle part of the right end of the spring positioning seat 2.5 is smaller than the inner diameter of the convex left end of the right plug 2.7; the spring 2.4, the spring positioning seat 2.5 and the working cylinder elastic baffle plate 2.6 are arranged in the cavity 2.31 from left to right; the left end of the spring 2.4 abuts against the cavity bottom of the concave cavity 2.31, the right end abuts against the left end of the spring positioning seat 2.5, the spring 2.4 pushes the elastic baffle plate 2.6 of the working cylinder against the left side surface of the right plug 2.7 through the spring positioning seat 2.5 so as to seal the central hole on the right plug 2.7; the air bag 2.8 is fixedly wrapped on the working cylinder body. Preferably, the spring 2.4 is a conical spring, the inner diameter of the large end of the conical spring is larger than the diameter of the locknut through hole 2.32 and is positioned on the left side, and the left end of the spring positioning seat 2.5 is provided with a circular truncated cone-shaped positioning boss 2.51 protruding into the right end of the spring 2.4;

the self-lubricating sleeve 3.21 is made of one of materials with self-lubricating characteristics such as brass, polytetrafluoroethylene, tin bronze, self-lubricating metal ceramics and the like, the shaft section of the self-lubricating sleeve is in a convex shape, and a through hole in sliding fit with the middle end of the piston rod body 1.1 is formed.

The left end of the oil storage cylinder body 3.1 is in a bottle bottom shape with a hole at the bottom, the left end of the left end socket 3.2 is abutted against the right side face of the left end of the oil storage cylinder body 3.1 in the bottle bottom shape, a sealing ring mounting groove matched with the left end socket large sealing ring 3.5 is arranged on the outer cylindrical face of the left end socket 3.2, and the left end socket 3.2 is connected with the left end of the oil storage cylinder body 3.1 in a sealing mode through the left end socket large sealing ring 3.5. The self-lubricating sleeve 3.21 is made of one of materials with self-lubricating characteristics such as brass, polytetrafluoroethylene, tin bronze, self-lubricating metal ceramics and the like, the shaft section of the self-lubricating sleeve is in a convex shape, and a through hole in sliding fit with the middle end of the piston rod body 1.1 is formed. The self-lubricating sleeve 3.21 is connected with the left seal head 3.2, and a through hole for the piston rod body 1.1 to pass through in a sliding fit manner on the self-lubricating sleeve forms a through hole for the middle end of the piston rod body 1.1 to pass through in a sliding fit manner on the left seal head 3.2. The left end socket 3.2 is provided with a left concave cavity for accommodating the left end socket small sealing ring 3.4 on the right side of the self-lubricating sleeve 3.21, and the left end socket small sealing ring 3.4 is connected with the piston rod body in a sliding sealing manner. The right end of the oil storage cylinder pull head 3.3 is provided with a pull hole, and the left end is hermetically and fixedly connected with the right end of the oil storage cylinder main body 3.1;

the working cylinder assembly 2 is arranged in the oil storage cylinder main body 3.1, the left plug 2.2 abuts against the left end socket 3.2, and the right plug 2.7 abuts against the puller 3.3 of the oil storage cylinder;

the inner diameter of the oil storage cylinder main body 3.1 is larger than the outer diameter of the working cylinder main body 2.1; the space enclosed by the oil storage cylinder main body 3.1 and the working cylinder body 2.1 is communicated with the central hole on the right plug 2.7 through a channel which is not shown in the figure;

the piston rod pull head 1.2 is positioned outside the left side surface of the left seal head 3.2, and the right end of the piston rod body 1.1 is positioned in the working cylinder body 2.1. Be equipped with the third sealing washer mounting groove with third sealing washer 1.9 adaptation on the middle sealing member 1.5, third sealing washer 1.9 of this embodiment is an O type sealing washer, and third sealing washer 1.9 is established in third sealing washer mounting groove, and middle sealing member 1.5 realizes through third sealing washer 1.9 that it links to each other with working cylinder body 2.1 sliding seal.

Preferably, the right end of the left plug 2.2 protrudes into the inner hole of the cylinder body 2.1 and is in interference fit with the cylinder body 2.1, and a welding connection can be performed between the left end of the cylinder body 2.1 and the left plug 2.2 as necessary to ensure the sealing performance. The left end of the middle choke plug 2.3 also protrudes into the inner hole of the working cylinder body 2.1 and is in interference fit with the working cylinder body 2.1, and if necessary, welding connection is carried out between the right end of the working cylinder body 2.1 and the middle choke plug 2.3 so as to ensure the sealing performance. Likewise, the left end of the right plug 2.7 protrudes into the cavity 2.31 at the right end of the middle plug 2.3 and is in interference fit with the middle plug 2.3 and is connected by welding between the right plug 2.7 and the middle plug 2.3 if necessary to ensure tightness.

Preferably, the diameter of the oil passing hole 1.51 is larger at both ends than at the middle end of the oil passing hole 1.51. Preferably, a plurality of elasticity increasing grooves 1.52 are further formed at two ends of the oil passing hole 1.51 to ensure that the left elastic baffle plate 1.6 and the right elastic baffle plate 1.7 are deformed correspondingly in time to conduct corresponding oil paths.

Preferably, the left elastic baffle 1.6 and the right elastic baffle 1.7 are formed by overlapping two elastic baffles, and the working cylinder elastic baffle 2.6 is formed by overlapping three elastic baffles.

The above embodiments are merely preferred embodiments of the present invention, and not intended to limit the structure and scope of the invention. Indeed, many equivalent variations in the shapes, constructions and design objectives of the devices according to the present invention are possible. Therefore, all equivalent changes in the shapes, structures and design objectives of the present invention are intended to be covered by the present invention, and all such equivalent changes are intended to be protected by the present invention.