CN112298262A - Buffer device, coupler assembly, train and rail transit system - Google Patents

Buffer device, coupler assembly, train and rail transit system Download PDF

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Publication number
CN112298262A
CN112298262A CN201910697381.6A CN201910697381A CN112298262A CN 112298262 A CN112298262 A CN 112298262A CN 201910697381 A CN201910697381 A CN 201910697381A CN 112298262 A CN112298262 A CN 112298262A
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CN
China
Prior art keywords
cavity
assembly
lip
valve body
medium
Prior art date
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Pending
Application number
CN201910697381.6A
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Chinese (zh)
Inventor
张静
刘佳佳
王卫春
吴圣
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BYD Co Ltd
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BYD Co Ltd
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Publication date
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN201910697381.6A priority Critical patent/CN112298262A/en
Publication of CN112298262A publication Critical patent/CN112298262A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G9/00—Draw-gear
    • B61G9/04—Draw-gear combined with buffing appliances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G9/00—Draw-gear
    • B61G9/12—Continuous draw-gear combined with buffing appliances, e.g. incorporated in a centre sill
    • B61G9/16—Continuous draw-gear combined with buffing appliances, e.g. incorporated in a centre sill with fluid springs or fluid shock-absorbers; Combinations thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G9/00—Draw-gear
    • B61G9/20—Details; Accessories

Abstract

The invention discloses a buffer device, a coupler component, a train and a rail transit system, wherein the buffer device comprises a piston cylinder, a separation component and a piston rod, a medium cavity is arranged in the piston cylinder, the separation component is arranged in the medium cavity to separate the medium cavity into a first sub cavity and a second sub cavity which are positioned at two sides of the separation component, an overflowing channel communicated with the first sub cavity and the second sub cavity is arranged on the separation component, the piston rod comprises a plug part, a first rod part and a second rod part, the first rod part and the second rod part are arranged at two sides of the plug part, the plug part is positioned in the first sub cavity, the first rod part penetrates through the separation component, and the second rod part penetrates through the piston cylinder. The buffer device has good buffer performance and simultaneously realizes quick return.

Description

Buffer device, coupler assembly, train and rail transit system
Technical Field
The invention relates to the technical field of rail transit, in particular to a buffer device, a coupler assembly, a train and a rail transit system.
Background
At present, coupler buffer devices used on railway vehicles have various forms, such as rubber buffer devices, daub buffer devices, hydraulic buffer devices and the like.
In the related art, the possibility that the piston scrapes the inner wall of the piston rod exists in the process and the return stroke of the buffer device, and the piston rod is subjected to an unbalanced impact load, so that the buffer device is poor in sealing and has a leakage risk; in addition, in the operation process, the buffer device cannot fully consume impact energy, the energy absorption rate of the buffer device is reduced, and meanwhile, a piston rod of the buffer device cannot be quickly reset.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a buffer device which has good buffer performance and simultaneously realizes quick return.
The invention also provides a coupler assembly with the buffer device.
The invention also provides a train with the coupler assembly.
The invention further provides a rail transit system with the train.
A buffer device according to a first aspect of the present invention includes: the piston cylinder is internally provided with a medium cavity; the separation assembly is arranged in the medium cavity to separate the medium cavity into a first sub cavity and a second sub cavity which are positioned at two sides of the separation assembly, and an overflowing channel communicated with the first sub cavity and the second sub cavity is arranged on the separation assembly; the piston rod comprises a plug portion, a first rod portion and a second rod portion, the first rod portion and the second rod portion are arranged on two sides of the plug portion, the plug portion and the first rod portion are located in the medium cavity, the first rod portion penetrates through the separation assembly, and the second rod portion penetrates through the piston cylinder.
According to the buffering device, the separating component is arranged to separate the medium cavity into the first sub cavity and the second sub cavity which are communicated, so that the buffering device can fully consume impact capacity in the operation process of the buffering device, the energy absorption rate of the buffering device can be improved, and meanwhile, the piston rod of the buffering device can be quickly returned.
According to some embodiments of the invention, the partition assembly comprises: the outer ring of the positioning ring is in positioning fit with the medium cavity, and the positioning ring is provided with an overflowing hole; the first guide sleeve is matched with the inner ring of the positioning ring, and the first rod part penetrates through the first guide sleeve.
According to some embodiments of the invention, the partition assembly further comprises: the first clamp spring is matched with the medium cavity in a positioning mode, one axial end of the positioning ring abuts against the first clamp spring, a first positioning boss is arranged in the piston cylinder, and the other axial end of the positioning ring abuts against the first positioning boss.
According to some embodiments of the invention, the buffer device further comprises: the second guide sleeve is embedded in the through hole in the piston cylinder, and the second rod part penetrates through the second guide sleeve.
According to some embodiments of the invention, the buffer device further comprises: a first seal assembly sealing between the second rod portion and the piston cylinder, the first seal assembly including at least one first lip seal having a lip opening to the media chamber.
According to some embodiments of the invention, the first seal assembly further comprises: and the first elastic sealing ring and the second elastic sealing ring are arranged on two sides of the first lip-shaped sealing ring.
According to some embodiments of the invention, the first seal assembly further comprises: and the elastic piece is arranged on one side of all the first lip-shaped sealing rings, which is far away from the medium cavity.
According to some embodiments of the invention, the buffer device further comprises: the second guide sleeve is embedded in the through hole in the piston cylinder, the second rod portion penetrates through the second guide sleeve, the second clamp spring is matched with the wall surface of the through hole in a positioning mode, the first sealing assembly is located between the second guide sleeve and the second clamp spring, the second guide sleeve is internally provided with an accommodating groove facing the opening of the second clamp spring, and the elastic piece is accommodated in the accommodating groove.
According to some embodiments of the invention, the piston cylinder comprises a cylinder barrel and a cylinder cover, the cylinder cover is arranged at one axial end of the cylinder barrel and defines the medium cavity with the cylinder barrel, and the buffer device further comprises: the second seal assembly is sealed between the cylinder barrel and the cylinder cover and comprises at least one second lip-shaped seal ring, and the lip opening of the second lip-shaped seal ring is opened towards the medium cavity.
According to some embodiments of the invention, the cylinder bore and the cylinder head are threadedly connected.
According to some embodiments of the invention, the piston cylinder is formed with an injection port communicating with the medium chamber, the damping device further comprising: the valve body assembly is arranged on the injection port.
According to some embodiments of the invention, further comprising: a third seal assembly sealed between the piston cylinder and the valve body assembly, the third seal assembly including at least one third lip seal having a lip opening to the media cavity.
According to some embodiments of the invention, the valve body assembly comprises: the valve body is provided with an injection channel and a valve body cavity, and the valve body cavity is communicated between the medium cavity and the injection channel; the stopper is arranged in the valve body cavity and is provided with a through hole; the valve ball is arranged in the valve body cavity and positioned between the stopper and the injection channel, and the valve ball is used for sealing the injection channel timely.
According to some embodiments of the invention, the valve body assembly further comprises: and the third clamp spring is matched with the wall surface of the valve body cavity in a positioning manner, one axial end of the stopper abuts against the third clamp spring, a second positioning boss is arranged in the valve body cavity, and the other axial end of the stopper abuts against the second positioning boss.
According to some embodiments of the invention, the piston cylinder and the valve body are threadedly connected.
According to some embodiments of the invention, the plug portion has an orifice therethrough from a process side end face of the plug portion to a return side end face of the plug portion.
According to some embodiments of the invention, the piston rod is a single piece.
According to some embodiments of the invention, the medium cavity is filled with a buffer medium.
A coupler assembly according to a second aspect of the present invention includes: the buffer device comprises a hook head for hooking, a base for being installed on a carriage, and a buffer device connected between the hook head and the base, wherein the buffer device is the buffer device according to the first aspect of the invention.
According to the coupler assembly, the coupler assembly has good buffering performance by adopting the buffering device.
A train according to a third aspect of the invention, comprising: a plurality of carriages and a coupler assembly according to the above second aspect of the invention, adjacent carriages being connected by the coupler assembly.
According to the train, the comfort of the train is improved by adopting the coupler assembly.
The rail transit system according to the fourth aspect of the invention comprises: a track and a train according to the above third aspect of the invention, the train travelling along the track
According to the rail transit system, the train is adopted, so that the applicability of the rail transit system is convenient to improve.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a damping device according to an embodiment of the present invention, wherein a medium chamber is filled with a damping medium, and a piston rod is in an initial state;
FIG. 2 is a schematic view of the cushioning device shown in FIG. 1, wherein the media chamber is not filled with a cushioning media;
FIG. 3 is an assembled schematic view of the piston rod shown in FIG. 2;
FIG. 4 is an enlarged view of portion A circled in FIG. 2;
FIG. 5 is an enlarged view of the portion B circled in FIG. 2;
FIG. 6 is a schematic view of the piston rod shown in FIG. 3;
FIG. 7 is a schematic structural view of the second guide sleeve shown in FIG. 3;
fig. 8 is a schematic view of the first lip seal shown in fig. 3;
FIG. 9 is a schematic view of the first elastomeric seal ring shown in FIG. 3;
FIG. 10 is a schematic view of the second elastomeric seal ring shown in FIG. 3;
FIG. 11 is a schematic illustration of a train according to one embodiment of the present invention;
fig. 12 is a schematic view of a rail transit system according to one embodiment of the present invention.
Reference numerals:
a rail transit system 400; a track 301;
a train 300; a vehicle compartment 201;
a coupler assembly 200;
a buffer device 100; a hook head 101; a base 102;
a piston cylinder 1; a media chamber 10;
a first subchamber 10 a; a second subchamber 10 b; a first chamber 10 c;
a second chamber 10 d; a buffer medium 10 e; an inlet 10 f;
a cylinder barrel 11; a first positioning boss 111;
a cylinder head 12; a via 121;
a partition member 2; an overflow channel 20;
a positioning ring 21; a first guide sleeve 22; a first clamp spring 23;
an overflow aperture 210;
a piston rod 3; a plug portion 31; a first rod portion 32; the second lever portion 33;
an orifice 310; a process-side end face 311; a return side end face 312;
a second guide sleeve 4; a receiving groove 40;
a first seal assembly 5;
a first lip seal 51; a first elastic seal ring 52; a second elastic seal ring 53; an elastic member 54;
a lip 510; the lips 511; a mating groove 521; a fitting projection 531;
a second clamp spring 6;
a second seal assembly 7; a second lip seal 71;
a valve body assembly 8;
a valve body 81; an injection channel 811; a valve body cavity 812; a second positioning boss 8121;
a stopper 82; a through hole 820;
a valve ball 83; a third catch 84; a blocking piece 85;
a third seal assembly 9; and a third lip seal 91.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.
A draft gear 100, coupler assembly 200, train 300 and rail transit system 400 according to an embodiment of the present invention will now be described with reference to figures 1-12.
Referring to fig. 11 and 12, a rail transit system 400 may include a rail 301 and a train 300, the train 300 traveling along the rail 301, the train 300 may include a plurality of cars 201 and a coupler assembly 200 coupled between adjacent cars 201, the coupler assembly 200 including a coupler head 101 for hooking, a base 102 for mounting to the cars, and a damping device 100 coupled between the coupler head 101 and the base 102. The buffer device 100 may be a buffer device 100 according to any embodiment of the invention described later, the train 300 may be a railway train, a light rail, a subway, or the like, and the rail transit system 400 may be a subway system, a light rail system, or the like.
As shown in fig. 1 and 2, the damping device 100 includes a piston cylinder 1, a medium cavity 10 is provided in the piston cylinder 1, and the medium cavity 10 is adapted to be filled with a damping medium 10e, such as elastic cement or the like; the shock absorber 100 further includes a piston rod 3, the piston rod 3 includes a plug portion 31, a first rod portion 32 and a second rod portion 33, the first rod portion 32 and the second rod portion 33 are respectively disposed at two sides of the plug portion 31, for example, the first rod portion 32 and the second rod portion 33 are respectively disposed at two axial sides of the plug portion 31.
As shown in fig. 1 and 2, the buffering device 100 further includes a partition component 2, the partition component 2 is disposed in the medium cavity 10, the first rod portion 32 is disposed through the partition component 2, so that the partition component 2 can support the first rod portion 32 to facilitate positioning of the first rod portion 32, the second rod portion 33 is disposed through the piston cylinder 1 to facilitate supporting of the second rod portion 33 by the piston cylinder 1, and facilitate positioning of the second rod portion 33, when the plug portion 31 moves in the medium cavity 10, the partition component 2 can guide the first rod portion 32 to move, and the piston cylinder 1 can guide the second rod portion 33 to move, thereby positioning and guiding two axial ends of the piston rod 3 to facilitate ensuring coaxiality between the piston rod 3 and the piston cylinder 1, and even if an impact load applied to the piston rod 3 has an unbalance load, abrasion of the piston rod 3 can be reduced, and poor sealing can be avoided, Alleviate medium 10e and reveal the scheduling problem, for in the conventional art, because the structure setting of piston rod 3 makes piston rod 3 can only axial one end location, can avoid scraping between stopper portion 31 and the piston cylinder 1 when piston rod 3 receives impact load in this application, promoted piston rod 3's durability, be favorable to prolonging piston rod 3's life.
The separating assembly 2 separates the medium cavity 10 into a first sub-cavity 10a and a second sub-cavity 10b located at two sides of the separating assembly 2, the first sub-cavity 10a and the second sub-cavity 10b can be arranged along the axial direction of the piston rod 3, the separating assembly 2 is provided with a flow passage 20 communicating the first sub-cavity 10a with the second sub-cavity 10b, when the buffering device 100 is used, the medium cavity 10 can be filled with a buffering medium 10e, the buffering medium 10e in the first sub-cavity 10a can flow into the second sub-cavity 10b through the flow passage 20, and the buffering medium 10e in the second sub-cavity 10b can flow into the first sub-cavity 10a through the flow passage 20.
The plug 31 is located in the first sub-chamber 10a, the plug 31 may reciprocate in the first sub-chamber 10a in the axial direction of the piston rod 3, and the movement of the plug 31 in the first sub-chamber 10a may include the plug 31 moving in the direction of the first sub-chamber 10a toward the second sub-chamber 10b (e.g., from left to right in fig. 1), and the plug 31 moving in the direction of the second sub-chamber 10b toward the first sub-chamber 10a (e.g., from right to left in fig. 1). When the plug 31 moves in the first sub-cavity 10a, the plug 31 can divide the first sub-cavity 10a into a first cavity 10c and a second cavity 10d located at two axial sides of the plug 31, the first cavity 10c is communicated with the second cavity 10d, the second cavity 10d is located between the first cavity 10c and the second sub-cavity 10b, and the second cavity 10d is communicated with the second sub-cavity 10b through the flow passage 20.
For example, when the shock absorber 100 is subjected to a compressive load, the movement of the piston rod 3 is a process to achieve the load damping, and when the shock absorber 100 is subjected to an unloaded load (the direction of the unloaded load is opposite to the direction of the compressive load), the movement of the piston rod 3 is a return stroke to achieve the load damping.
When the piston rod 3 advances, the plug 31 moves along the direction from the first sub-chamber 10a to the second sub-chamber 10b, the volume of the first chamber 10c gradually increases, the volume of the second chamber 10d gradually decreases, a part of the buffer medium 10e in the second chamber 10d can flow to the first chamber 10c at least through a gap between the outer peripheral surface of the plug 31 and the wall surface of the medium chamber 10, meanwhile, the volume of the part of the first rod part 32 extending into the second sub-chamber 10b gradually increases to compress the buffer medium 10e in the second sub-chamber 10b, and a part of the buffer medium 10e in the second sub-chamber 10b can flow into the second chamber 10d through the flow passage 20. In the above process, a part of the impact energy received by the piston rod 3 can be converted into friction between the buffer medium 10e and the wall surface of the medium cavity 10 and consumed by movement between the molecules in the buffer medium 10e, and another part can be converted into elastic potential energy of the buffer medium 10e to be stored, thereby playing a role of buffering and absorbing energy.
When the piston rod 3 returns, the plug 31 moves along the direction from the second sub-chamber 10b to the first sub-chamber 10a, the volume of the first chamber 10c gradually decreases, the volume of the second chamber 10d gradually increases, a part of the buffer medium 10e in the first chamber 10c can flow to the second chamber 10d at least through a gap between the outer peripheral surface of the plug 31 and the wall surface of the medium chamber 10, meanwhile, the volume of the part of the first rod part 32 extending into the second sub-chamber 10b gradually decreases, and a part of the buffer medium 10e in the second chamber 10d can flow into the second sub-chamber 10b through the flow passage 20. In the above process, a part of the elastic potential energy stored in the buffer medium 10e can be converted into friction between the buffer medium 10e and the wall surface of the medium cavity 10 and movement between the molecules in the buffer medium 10e for consumption, and most of the elastic potential energy is used for offsetting the impact energy received by the piston rod 3, thereby playing a role in buffering and absorbing energy.
From this, the buffer medium 10e of first sub-chamber 10a can mainly be used for buffering the impact load that piston rod 3 received, and through overflowing passageway 20 intercommunication between second sub-chamber 10b and the first sub-chamber 10a, make the buffer medium 10e of first sub-chamber 10a can cushion the impact load that piston rod 3 received, the impact load that piston rod 3 received not only can be cushioned to the effort that first pole portion 32 was applyed to buffer medium 10e of second sub-chamber 10b, be convenient for realize the abundant consumption of impact energy, promote energy absorption rate, can also realize the quick return of piston rod 3, promote the return efficiency of piston rod 3, thereby when buffer 100 is applied to coupler assembly 200, can promote coupler assembly 200's shock-absorbing capacity, be favorable to promoting the safe travelling comfort of train 300.
According to the buffering device 100 provided by the embodiment of the invention, the separating component 2 is arranged to separate the medium cavity 10 into the first sub-cavity 10a and the second sub-cavity 10b which are communicated, so that in the operation process of the buffering device 100, the buffering device 100 can fully consume impact capacity, the energy absorption rate of the buffering device 100 can be improved, and meanwhile, the piston rod 3 of the buffering device 100 can be quickly returned.
For example, the medium chamber 10 is filled with a buffer medium 10e, and the buffer medium 10e can buffer the impact energy received by the piston rod 3, so that the lift-up buffer device 100 has the function of buffering and absorbing energy. Wherein, buffering medium 10e can select to be elastic clay, and elastic clay is a semifluid, has a series of advantages such as thermal stability, chemical stability, it is not ageing, high elasticity, good compressibility, good mobility, then buffer 100 in this application can be for clay buffer, for rubber buffer, clay buffer's in this application shock-absorbing capacity is high, the capacity is big, energy absorption rate is high, longe-lived, for hydraulic buffer, liquid gas buffer, clay buffer in this application is convenient for guarantee sealed, easy maintenance.
In addition, the coupler assembly 200, the train 300 and the rail transit system 400 according to the embodiment of the present invention may have the same advantages as the buffer device 100 due to the buffer device 100 according to the embodiment of the present invention, and thus, detailed descriptions thereof are omitted.
In some embodiments of the present invention, as shown in fig. 1, 2 and 4, the separation assembly 2 comprises a positioning ring 21, the positioning ring 21 is formed in a ring-shaped structure, an outer ring of the positioning ring 21 is in positioning fit with the medium chamber 10 to facilitate positioning and installation of the separation assembly 2, an inner ring of the positioning ring 21 can be directly or indirectly fitted with the first rod portion 32, the positioning ring 21 is provided with an overflowing hole 210, the overflowing hole 210 can penetrate through the positioning ring 21 in the axial direction of the piston rod 3, and the overflowing hole 210 can define the overflowing channel 20 to communicate the first sub-chamber 10a and the second sub-chamber 10 b. Therefore, the partition component 2 has simple structure and is convenient to position.
As shown in fig. 1, 2 and 4, the partition assembly 2 further includes a first guiding sleeve 22, the first guiding sleeve 22 may be formed into a ring-shaped structure, the first guiding sleeve 22 is fitted to the inner ring of the positioning ring 21, for example, the first guiding sleeve 22 may be in interference fit with the inner ring of the positioning ring 21 to ensure the positioning of the first guiding sleeve 22 and the positioning ring 21, the first rod portion 32 is inserted through the first guiding sleeve 22, the first guiding sleeve 22 may be in direct contact with the first rod portion 32, the positioning ring 21 may be in indirect contact with the first rod portion 32 through the first guiding sleeve 22, and the first guiding sleeve 22 is convenient to be tightly fitted with the first rod portion 32, which is beneficial to improving the sealing performance and the wear resistance of the partition assembly 2.
Optionally, the contact surface of the first guide sleeve 22 and the first rod portion 32 may be provided with a self-lubricating material layer, so that the first guide sleeve 22 has a self-lubricating effect, the friction force between the first guide sleeve 22 and the first rod portion 32 may be reduced, the coaxiality of the piston rod 3 between the moving process and the piston cylinder 1 is further ensured, and the service life of the piston rod 3 is prolonged. For example, the first guide sleeve 22 may include a copper mesh member and a self-lubricating material member, the self-lubricating material member may be formed into a self-lubricating material layer to be disposed on a contact surface of the copper mesh member with the first rod portion 32, so as to ensure good bondability between the copper mesh member and the self-lubricating material member, and then the self-lubricating material member directly contacts with the first rod portion 32, and the copper mesh member indirectly contacts with the first rod portion 32 through the self-lubricating material member; the self-lubricating material piece can be a polytetrafluoroethylene material piece, but is not limited to the polytetrafluoroethylene material piece.
Further, as shown in fig. 1 and 4, the partition assembly 2 further includes a first snap spring 23, the first snap spring 23 is in positioning fit with the medium cavity 10 to achieve positioning and installation of the first snap spring 23, one axial end of the positioning ring 21 abuts against the first snap spring 23, a first positioning boss 111 is arranged in the piston cylinder 1, the other axial end of the positioning ring 21 abuts against the first positioning boss 111, and then the first snap spring 23 and the first positioning boss 111 can limit axial displacement of the positioning ring 21 on the piston rod 3, so that positioning of the positioning ring 21 is achieved. Therefore, the positioning ring 21 is simple in positioning and convenient to assemble.
For example, in the example of fig. 1 and 4, a positioning groove may be formed on the wall surface of the media cavity 10, the positioning groove may be formed by partially recessing the wall surface of the media cavity 10, the outer side of the first snap spring 23 is positioned and fitted in the positioning groove, and one axial end of the positioning ring 21 abuts against the end of the first snap spring 23 facing away from the first sub-cavity 10 a; the cross section of the first sub-cavity 10a is different from the cross section of the second sub-cavity 10b in size, the outer profile of the cross section of the second sub-cavity 10b can be located inside the outer profile of the cross section of the first sub-cavity 10a to form a first positioning boss 111, and the other axial end of the positioning ring 21 abuts against the first positioning boss 111. The first positioning boss 111 is not limited to this.
In some embodiments of the present invention, as shown in fig. 1 to 3, the buffering device 100 further includes a second guiding sleeve 4, the second guiding sleeve 4 may be formed into an annular structure, the second guiding sleeve 4 is embedded in the through hole 121 on the piston cylinder 1, for example, the second guiding sleeve 4 may be in interference fit with the through hole 121 to ensure the positioning of the second guiding sleeve 4 and the piston cylinder 1, the through hole 121 may be formed as a through hole and the through hole 121 may communicate with the first sub-cavity 10a, the second rod portion 33 is inserted through the second guiding sleeve 4, the second guiding sleeve 4 may directly contact with the second rod portion 33, and the second guiding sleeve 4 is convenient to be tightly fitted with the second rod portion 33, which is beneficial to improve the sealing performance and the wear resistance of the piston cylinder 1.
Optionally, the contact surface of the second guide sleeve 4 and the second rod portion 33 may be provided with a self-lubricating material layer, so that the second guide sleeve 4 has a self-lubricating effect, the friction force between the second guide sleeve 4 and the second rod portion 33 may be reduced, the coaxiality of the piston rod 3 between the moving process and the piston cylinder 1 is further ensured, and the service life of the piston rod 3 is prolonged. For example, the second guide sleeve 4 may include a copper mesh member and a self-lubricating material member, the self-lubricating material member may be formed into a self-lubricating material layer to be disposed on a contact surface of the copper mesh member and the second rod portion 33, so as to ensure good bondability between the copper mesh member and the self-lubricating material member, and then the self-lubricating material member directly contacts the second rod portion 33, and the copper mesh member indirectly contacts the second rod portion 33 through the self-lubricating material member; the self-lubricating material piece can be a polytetrafluoroethylene material piece, but is not limited to the polytetrafluoroethylene material piece.
In some embodiments of the present invention, as shown in fig. 1 and 2, the damping device 100 further comprises a first sealing assembly 5, wherein the first sealing assembly 5 seals between the second rod portion 33 and the piston cylinder 1, and ensures the sealing performance between the second rod portion 33 and the piston cylinder 1; the first seal assembly 5 includes at least one first lip seal 51, that is, the first lip seal 51 may be one or more, the first lip seal 51 has two lips 511, one end of the two lips 511 is connected, and the other end is spaced apart from each other to form a lip 510, the lip 510 of the first lip seal 51 is opened toward the medium chamber 10, and then the lip 510 may be deformed and further expanded by the pressure of the buffer medium 10e, so that the two lips 511 are better attached to the second rod portion 33 and the piston cylinder 1, and the sealing performance between the second rod portion 33 and the piston cylinder 1 is effectively improved.
The lip 511 can be attached to the sealing surface more tightly as the pressure of the buffer medium 10e is higher, and the lip 511 has a certain automatic compensation capability after being worn, so that the working life of the buffer device 100 is ensured.
It is to be understood that, when the first lip seal 51 is plural, as shown in fig. 1, plural first lip seals 51 may be sequentially stacked in the axial direction of the piston rod 3, the plural first lip seals 51 may have the same structure, and the lips 510 of the plural first lip seals 51 may be each disposed to be open to the medium chamber 10, that is, one ends of the two lips 511 of the first lip seal 51, which are far from the medium chamber 10, are connected, and one ends of the two lips 511, which are near to the medium chamber 10, are disposed to be spaced apart from each other. For example, the number of the first lip-shaped seal rings 51 may be two, three, or more than three.
Further, as shown in fig. 1-3 and 8-10, the first sealing assembly 5 further includes a first elastic sealing ring 52 and a second elastic sealing ring 53 disposed on two sides of all the first lip-shaped sealing ring 51, that is, all the first lip-shaped sealing ring 51 is disposed between the first elastic sealing ring 52 and the second elastic sealing ring 53, and the first elastic sealing ring 52 and the second elastic sealing ring 53 may provide a relatively flat support portion for two axial sides of the first sealing assembly 5, which is beneficial to ensuring the stability of the first lip-shaped sealing ring 51 and preventing the first lip-shaped sealing ring 51 from being squeezed into the gap, thereby facilitating to improve the stability of the first sealing assembly 5.
For example, in the example of fig. 3, 8-10, the first lip seal 51 may be plural, the plural first lip seals 51 may be stacked in the axial direction of the piston rod 3, the first elastic seal 52 may be provided on a side of the plural first lip seals 51 away from the medium chamber 10, and the second elastic seal 53 may be provided on a side of the plural first lip seals 51 close to the medium chamber 10; the first elastic seal ring 52 is formed with a fitting groove 521, and a side of the fitting groove 521 facing the first elastic seal rings 51 is open, so that one of the first elastic seal rings 51 adjacent to the first elastic seal ring 52 may be fitted into the fitting groove 521, the second elastic seal ring 53 is formed with a fitting protrusion 531, the fitting protrusion 531 may protrude toward the first elastic seal rings 51 in the axial direction of the piston rod 3, and the lip 510 of the first elastic seal ring 51 adjacent to the second elastic seal ring 53 may be fitted with the fitting protrusion 531. Thus, the first seal assembly 5 can be assembled as a single unit to facilitate installation of the first seal assembly 5. Among them, a side (e.g., a left side in fig. 1) of the first elastic sealing ring 52 facing away from the plurality of first lip-shaped sealing rings 51 may be formed as a plane, and a side (e.g., a right side in fig. 1) of the second elastic sealing ring 53 facing away from the plurality of first lip-shaped sealing rings 51 may be formed as a plane.
Further, as shown in fig. 3, the first seal assembly 5 further includes an elastic member 54 disposed on a side of all the first lip-shaped seal rings 51 away from the medium cavity 10, one end of the elastic member 54 can directly or indirectly abut against the side of all the first lip-shaped seal rings 51 away from the medium cavity 10, the elastic member 54 can be in a compressed state, and then the elastic member 54 can apply a pressing force toward the medium cavity 10 to all the first lip-shaped seal rings 51, when the first lip-shaped seal rings 51 are worn, the lip 511 of the first lip-shaped seal rings 51 can always tightly abut against the second rod portion 33 due to the pressing force applied by the elastic member 54, so that the first seal assembly 5 has a self-adjusting function, and ensures that the sealing effect of the first seal assembly 5 is not affected by the amount of wear, further ensures the sealing effect of the first seal assembly 5, and reduces the risk of leakage of the buffer medium 10e, the buffering performance of the buffering device 100 is effectively ensured.
For example, in the example of fig. 3, the first lip seal 51 may be plural, the plural first lip seals 51 may be stacked in the axial direction of the piston rod 3, the elastic member 54 may be provided on a side of the plural first lip seals 51 away from the medium chamber 10, and the elastic member 54 indirectly abuts against the side of the plural first lip seals 51 away from the medium chamber 10 to apply a pressing force to the plural first lip seals 51 toward the medium chamber 10 in the axial direction of the piston rod 3.
In some embodiments of the present invention, as shown in fig. 2 and 3, the buffering device 100 further includes a second guide sleeve 4 and a second snap spring 6, the second guide sleeve 4 may be formed into an annular structure, the second guide sleeve 4 is embedded in the through hole 121 on the piston cylinder 1, for example, the second guide sleeve 4 may be in interference fit with the through hole 121 to ensure the positioning of the second guide sleeve 4 and the piston rod 3, the through hole 121 may be formed as a through hole and the through hole 121 may communicate with the first sub-cavity 10a, the second rod portion 33 is inserted through the second guide sleeve 4, the second guide sleeve 4 may be in direct contact with the second rod portion 33, and the second guide sleeve 4 is convenient to be tightly fitted with the second rod portion 33, which is beneficial to improve the sealing performance and the wear resistance of the piston cylinder 1.
The second snap spring 6 is in positioning fit with the wall surface of the through hole 121, positioning and installation of the second snap spring 6 are achieved, the first sealing assembly 5 is located between the second guide sleeve 4 and the second snap spring 6, then all the first lip-shaped sealing rings 51 can be sealed between the wall surface of the through hole 121 and the second rod portion 33, and due to the extrusion force applied by the elastic piece 54, one sides of all the first lip-shaped sealing rings 51 close to the medium cavity 10 are directly or indirectly pressed on one side of the second snap spring 6. The second guide sleeve 4 has an accommodating groove 40 opening toward the second snap spring 6, the elastic element 54 is accommodated in the accommodating groove 40, and a side of the elastic element 54 away from the first lip seal 51 can be stopped against a wall surface of the accommodating groove 40.
In some embodiments of the present invention, the piston cylinder 1 includes a cylinder tube 11 and a cylinder head 12, the cylinder head 12 is disposed at one axial end of the cylinder tube 11, and a medium cavity 10 is defined between the cylinder head 12 and the cylinder tube 11, the buffer device 100 further includes a second sealing assembly 7, the second sealing assembly 7 is sealed between the cylinder tube 11 and the cylinder head 12 to ensure the sealing performance between the cylinder tube 11 and the cylinder head 12, the second sealing assembly 7 includes at least one second lip-shaped sealing ring 71, a lip 510 of the second lip-shaped sealing ring 71 is open toward the medium cavity 10, the lip 510 of the second lip-shaped sealing ring 71 can be deformed and further expanded under the pressure of the buffer medium 10e, so that the second lip-shaped sealing ring 71 can better cling to the cylinder tube 11 and the cylinder head 12, and the sealing performance between the cylinder tube 11 and the cylinder head 12 is improved.
For example, in the example of fig. 1, an axial one end (e.g., the left end in fig. 1) of the cylinder tube 11 may be formed with a first opening, and the cylinder head 12 is provided at the axial one end of the cylinder tube 11 to close the first opening, so that the cylinder head 12 may define the medium chamber 10 together with the cylinder tube 11. A first installation cavity can be defined between the cylinder barrel 11 and the cylinder cover 12, the second sealing assembly 7 is installed in the first installation cavity, and two axial ends of the second sealing assembly 7 can be respectively abutted to two axial side wall surfaces of the first installation cavity, so that limiting and installation of the second sealing assembly 7 are realized. Wherein, the second seal assembly 7 may further include a third elastic seal ring and a fourth elastic seal ring disposed at two axial sides of all the second lip-shaped seal rings 71, and then the third elastic seal ring and the fourth elastic seal ring may provide relatively flat supporting portions for two axial sides of the second seal assembly 7, so as to ensure the stability of the second seal assembly 7.
It will be appreciated that when the second sealing assembly 7 comprises a third elastic sealing ring and a fourth elastic sealing ring, the second lip-shaped sealing ring 71 may be one or more; when the second lip seal 71 is plural, the plural second lip seals 71 may be stacked in order in the axial direction of the piston rod 3, and the lip openings 510 of the plural second lip seals 71 may be all open toward the medium chamber 10. The number of the second lip-shaped sealing rings 71 may be the same as or different from the number of the first lip-shaped sealing rings 51, the structure of the second lip-shaped sealing rings 71 may be the same as that of the first lip-shaped sealing rings 51, the structure of the third elastic sealing rings may be the same as that of the first elastic sealing rings 52, and the structure of the fourth elastic sealing rings may be the same as that of the second elastic sealing rings 53; but is not limited thereto.
Optionally, as shown in fig. 1 and fig. 2, the cylinder 11 and the cylinder cover 12 are screwed, so that the sealing effect between the cylinder 11 and the cylinder cover 12 can be further ensured by the accuracy of the screw-thread fit between the cylinder 11 and the cylinder cover 12, and a double-seal fit is formed with the second seal assembly 7, thereby effectively avoiding leakage of the buffer medium 10e, and avoiding reduction of the initial pressure in the buffer device 100, thereby effectively ensuring the buffering performance of the buffer device 100, avoiding the failure of the buffer device 100, and making the use of the buffer device 100 reliable. Wherein, the cylinder 11 and the cylinder cover 12 can be screwed through external threads and internal threads, for example, internal threads are formed on the inner peripheral wall of the cylinder 11, and external threads are formed on the outer peripheral wall of the cylinder cover 12; of course, the connection manner between the cylinder tube 11 and the cylinder head 12 is not limited thereto.
In some embodiments of the present invention, as shown in fig. 1 and 2, the piston cylinder 1 is formed with an injection port 10f communicating with the medium chamber 10, and an operator can use a filling apparatus to inject a buffer medium 10e into the medium chamber 10 through the injection port 10 f; the buffer device 100 further includes a valve body assembly 8, and the valve body assembly 8 is disposed on the injection port 10f, so that the injection port 10f can be opened or closed by the valve body assembly 8, thereby facilitating the injection of the buffer medium 10e and avoiding the leakage of the buffer medium 10 e.
Further, as shown in fig. 1 and 2, the buffer device further includes a third seal assembly 9, the third seal assembly 9 is sealed between the piston cylinder 1 and the valve body assembly 8 to ensure the sealing performance between the piston cylinder 1 and the valve body assembly 8, the third seal assembly 9 includes at least one third lip-shaped seal ring 91, a lip 510 of the third lip-shaped seal ring 91 is opened toward the medium cavity 10, and the lip 510 of the third lip-shaped seal ring 91 can be deformed and further expanded under the pressure of the buffer medium 10e, so that the third lip-shaped seal ring 91 can better cling to the piston cylinder 1 and the valve body assembly 8, and the sealing performance between the piston rod 1 and the valve body assembly 8 is improved.
For example, in the example of fig. 2 and 5, a second installation cavity may be defined between the piston cylinder 1 and the valve body assembly 8, the third seal assembly 9 is installed in the second installation cavity, and two axial ends of the third seal assembly 9 may respectively abut against two axial side wall surfaces of the second installation cavity, so that the limiting and installing of the third seal assembly 9 are achieved. Wherein, the third seal assembly 9 may further include a fifth elastic seal ring and a sixth elastic seal ring disposed at two axial sides of the third lip-shaped seal ring 91, and the fifth elastic seal ring and the sixth elastic seal ring may provide relatively flat supporting portions for two axial sides of the third seal assembly 9, so as to ensure the stability of the third seal assembly 9.
It will be appreciated that when the third seal assembly 9 includes fifth and sixth elastomeric seal rings, the third lip seal 91 may be one or more; when the third lip seal 91 is plural, plural third lip seals 91 may be stacked in order in the axial direction of the piston rod 3, and the lip openings 510 of the plural third lip seals 91 may each be provided to be open toward the medium chamber 10. The number of the third lip-shaped sealing rings 91 may be the same as or different from the number of the first lip-shaped sealing rings 51, the structure of the third lip-shaped sealing rings 91 may be the same as that of the first lip-shaped sealing rings 51, the structure of the fifth elastic sealing ring may be the same as that of the first elastic sealing ring 52, and the structure of the sixth elastic sealing ring may be the same as that of the second elastic sealing ring 53; but is not limited thereto.
Alternatively, in the example of fig. 5, the valve body assembly 8 includes a valve body 81, a stopper 82, and a valve ball 83, the valve body 81 has an injection passage 811 and a valve body chamber 812 thereon, the valve body chamber 812 communicates between the medium chamber 10 and the injection passage 811, the stopper 82 is provided in the valve body chamber 812 and the stopper 82 is formed with a through hole 820, so that the medium chamber 10 can communicate with the valve chamber 812 through the through hole 820, the valve ball 83 is arranged in the valve chamber 812 and the valve ball 83 is located between the stopper 82 and the filling channel 811, the diameter of the valve ball 83 can be larger than the diameter of the through hole 820 to avoid the valve ball 83 moving into the medium chamber 10 through the through hole 820, the valve ball 83 is movable in the valve chamber 812 for closing the filling channel 811 at the right time, when the valve ball 83 blocks the injection channel 811, the injection channel 811 is blocked (i.e., non-conductive) from the valve body cavity 812, when the valve ball 83 does not block the injection channel 811, the injection channel 811 communicates with the valve body cavity 812. Therefore, the valve body assembly 8 can be roughly formed into a one-way valve, a special filling device can inject a certain buffer medium 10e into the medium cavity 10 through the injection channel 811, so that the initial pressure in the piston cylinder 1 reaches a preset value, and after filling is completed, the valve ball 83 can seal the injection channel 811, and leakage of the buffer medium 10e is avoided.
The stopper 82 can be a three-hole gasket, and three through holes 820 are formed in the stopper 82, and the three through holes 820 are uniformly distributed.
Further, as shown in fig. 5, the valve body assembly 8 further includes a third snap spring 84, the third snap spring 84 is in positioning fit with the wall surface of the valve body cavity 812 to achieve positioning and installation of the third snap spring 84, one axial end of the stopper 82 abuts against the third snap spring 84, a second positioning boss 8121 is arranged in the valve body cavity 812, and the other axial end of the stopper 82 abuts against the second positioning boss 8121, so that the third snap spring 84 and the second positioning boss 8121 can limit displacement of the stopper 82 in the axial direction of the piston rod 3, and positioning of the stopper 82 is achieved. Thus, the stop 82 is simple to position and easy to assemble.
For example, in the example of fig. 5, a positioning groove is formed on the wall surface of the valve body cavity 812, the positioning groove may be formed by partially recessing the wall surface of the valve body cavity 812 outwards, the outer side of the third snap spring 84 is positioned and matched with the positioning groove, and one axial end of the stopper 82 abuts against the end of the third snap spring 84 facing away from the medium cavity 10; a cross section of a portion of the valve body cavity 812 corresponding to the valve ball 83 is different in size from a cross section of a portion of the valve body cavity 812 corresponding to the stopper 82, and a cross-sectional outer contour of a portion of the valve body cavity 812 corresponding to the valve ball 83 may be located inside the cross-sectional outer contour of the valve body cavity 812 corresponding to the stopper 82 to form a second positioning boss 8121, and the other axial end of the stopper 82 is stopped against the second positioning boss 8121.
As shown in fig. 5, both ends in the axial direction of the injection channel 811 may be respectively formed as through holes, the valve ball 83 may timely close the through hole at one end in the axial direction of the injection channel 811, a blocking piece 85 may further be disposed at the through hole at the other end in the axial direction of the injection channel 811, the blocking piece 85 may be detachably mounted to the valve body 81, and the blocking piece 85 is used for blocking the injection channel 811, so that when the buffer device 100 needs to inject the buffer medium 10e, the blocking piece 85 may be detached from the valve body 81, and when the buffer device 100 completes the filling, the blocking piece 85 may be mounted to the valve body to block the injection channel 811, thereby further improving the sealing performance of the buffer device 100. The plugging member 85 may be screwed to the valve body 81, for example, but not limited to, the plugging member 85 is a screw.
Optionally, as shown in fig. 2 and fig. 5, the piston cylinder 1 and the valve body 81 are screwed, so that the sealing effect between the piston cylinder 1 and the valve body 81 can be further ensured by the thread fit precision between the piston cylinder 1 and the valve body 81, leakage of the buffer medium 10e is effectively avoided, and reduction of initial pressure in the buffer device 100 is avoided, thereby effectively ensuring the buffer performance of the buffer device 100, avoiding failure of the buffer device 100, and making the buffer device 100 reliable in use. The piston cylinder 1 and the valve body 81 can be screwed with each other through external threads and internal threads, for example, a second opening can be formed at the other axial end (e.g., the right end in fig. 2) of the piston cylinder 1, the valve body 81 is disposed at the other axial end of the piston cylinder 1 to close the second opening, internal threads can be formed on the inner wall of the second opening, and external threads can be formed on the outer peripheral wall of the valve body 81; of course, the manner of connection between the piston cylinder 1 and the valve body 81 is not limited thereto.
In some embodiments of the present invention, the plug portion 31 has an orifice 310 therethrough from a process side end surface 311 of the plug portion 31 to a return side end surface 312 of the plug portion 31. For example, in the example of fig. 1 to 3, the plug portion 31 may be formed in a columnar structure, both axial side end faces of the plug portion 31 include a process side end face 311 and a return side end face 312, the process side end face 311 is located on the process side of the plug portion 31, the return side end face 312 is located on the return side of the plug portion 31, the orifice 310 may extend in the axial direction of the plug portion 31 and both axial ends of the orifice 310 penetrate the process side end face 311 and the return side end face 312, respectively, so that the first chamber 10c and the second chamber 10d may communicate through the orifice 310. When the piston rod 3 advances, a part of the buffer medium 10e in the second chamber 10d can also flow to the first chamber 10c through the throttle hole 310; when the piston rod 3 returns, a part of the buffer medium 10e in the first chamber 10c may also flow to the second chamber 10d through the orifice 310. Therefore, in the movement process of the piston rod 3, the impact energy received by the piston rod 3 is consumed by the friction between the buffer medium 10e and the wall surface of the medium cavity 10, the outer peripheral wall of the plug part 31 and the wall surface of the throttling hole 310 and the movement of the inner part of the buffer medium 10e, and different buffer performances of the buffer device 100 can be realized by designing the gap between the plug part 31 and the medium cavity 10 and the cross section area of the throttling hole 310, so that the buffer device 100 can meet the use requirements of different occasions, and the applicability of the buffer device 100 is improved.
In some embodiments of the present invention, as shown in fig. 1-3, the piston rod 3 is a single piece, and the plug portion 31, the first rod portion 32 and the second rod portion 33 are integrally designed, so that compared to the conventional piston rod which is a split design, such as the plug portion and the rod portion of the piston rod are screwed, the piston rod 3 integrally designed in this application is beneficial to simplifying the structure of the piston rod 3, simplifying the assembly process, improving the assembly efficiency of the cushioning device 100, and simultaneously facilitating to ensure the coaxiality of the plug portion 31, the first rod portion 32 and the second rod portion 33. For example, the piston rod 3 may be selected as a 42CrMo high performance alloy steel material, and the outer surface of the piston rod 3 may be plated with hard chrome, but is not limited thereto.
The following describes in detail a damping device 100 according to an embodiment of the present invention in a specific embodiment with reference to fig. 1 to 10. It is to be understood that the following description is only exemplary, and not a specific limitation of the invention.
As shown in fig. 1 and 2, the damping device 100 includes a piston cylinder 1, a partition assembly 2, a piston rod 3, a second guide sleeve 4, a first seal assembly 5, a second snap spring 6, a second seal assembly 7, a valve body assembly 8, and a third seal assembly 9.
The piston cylinder 1 comprises a cylinder barrel 11 and a cylinder cover 12, a first opening is formed at one axial end of the cylinder barrel 11, the cylinder cover 12 is screwed to the axial end of the cylinder barrel 11 through matching threads of internal threads and external threads to block the first opening, a medium cavity 10 is defined between the cylinder barrel 11 and the cylinder cover 12, and a buffer medium 10e, such as elastic daub, is filled in the medium cavity 10; the second sealing assembly 7 is sealed between the cylinder barrel 11 and the cylinder cover 12, the second sealing assembly 7 comprises a second lip-shaped sealing ring 71, a third elastic sealing ring and a fourth elastic sealing ring which are arranged on two axial sides of the second lip-shaped sealing ring 71, the second lip-shaped sealing ring 71 is one, and a lip mouth 510 of the second lip-shaped sealing ring 71 is opened towards the medium cavity 10.
A second opening is formed at the other axial end of the cylinder barrel 11, and the valve body assembly 8 is screwed to the other axial end of the cylinder barrel 11 through the matching threads of the internal thread and the external thread to block the second opening, so that an injection port 10f communicated with the medium cavity 10 is formed on the piston cylinder 1; the third seal assembly 9 is sealed between the piston cylinder 1 and the valve body assembly 8, the third seal assembly 9 comprises a third lip-shaped seal ring 91, a fifth elastic seal ring and a sixth elastic seal ring which are arranged on two axial sides of the third lip-shaped seal ring 91, the third lip-shaped seal ring 91 is one, and a lip 510 of the third lip-shaped seal ring 91 is open towards the medium cavity 10.
As shown in fig. 1 and 5, the valve body assembly 8 includes a valve body 1, a stopper 82, a valve ball 83, a third snap spring 84, and a blocking member 85, the valve body 81 is screwed to the cylinder 11, the valve body 81 has an injection passage 811 and a valve body chamber 812, the valve body chamber 812 communicates between the medium chamber 10 and the injection passage 811, the stopper 82 is provided in the valve body chamber 812 with both axial ends of the stopper 82 respectively abutting against the third snap spring 84 and the second positioning boss 8121 of the valve body chamber 812, the stopper 82 is formed with a through hole 820, so that the medium chamber 10 can communicate with the valve chamber 812 through the through hole 820, the valve ball 83 is provided in the valve chamber 812 with the valve ball 83 between the stopper 82 and the injection channel 811, the diameter of the valve ball 83 may be larger than the diameter of the through hole 820 to prevent the valve ball 83 from moving into the medium chamber 10 through the through hole 820, the valve ball 83 is movable in the valve chamber 812 for closing one axial end of the injection channel 811 at a proper time, and the blocking member 85 is screwed to the valve body 81 to close the other axial end of the injection channel 811.
The separation component 2 is arranged in the medium cavity 10 to separate the medium cavity 10 into a first sub-cavity 10a and a second sub-cavity 10b which are positioned at two sides of the separation component 2, and the separation component 2 is provided with a flow passage 20 which is communicated with the first sub-cavity 10a and the second sub-cavity 10 b. The piston rod 3 is formed into a single piece, the piston rod 3 comprises a plug portion 31, a first rod portion 32 and a second rod portion 33, the first rod portion 32 and the second rod portion 33 are respectively arranged on two axial sides of the plug portion 31, the cross-sectional area of the first rod portion 32 is smaller than that of the second rod portion 33, the plug portion 31 is located in a first sub-cavity 10a, the plug portion 31 can reciprocate in the first sub-cavity 10a along the axial direction of the piston rod 3, the working condition of the buffer device 100 is high-pressure dynamic sealing, an orifice 310 penetrating from a process side end face 311 of the plug portion 31 to a return side end face 312 of the plug portion 31 is formed in the plug portion 31, a gap is formed between the outer peripheral face of the plug portion 31 and the medium cavity 10, the gap can be formed into an annular gap, the first rod portion 32 penetrates through the partition assembly 2, and the second rod portion 33 penetrates through the cylinder head 12, and positioning and guiding.
As shown in fig. 1 and 4, the partition assembly 2 includes a positioning ring 21, a first guide sleeve 22 and a first snap spring 23, the positioning ring 21 and the first guide sleeve 22 are both formed into an annular structure, a through-flow hole 210 is formed in the positioning ring 21, the through-flow hole 210 defines a through-flow channel 20 to communicate the first sub-cavity 10a and the second sub-cavity 10b, an outer ring of the positioning ring 21 is in positioning fit with the medium cavity 10, the first guide sleeve 22 is in interference fit with an inner ring of the positioning ring 21, and the first rod portion 32 is inserted through the first guide sleeve 22; the first snap spring 23 is in positioning fit with the medium cavity 10, one axial end of the positioning ring 21 abuts against the first snap spring 23, and the other axial end abuts against the first positioning boss 111 in the cylinder 11.
As shown in fig. 1, the second guide sleeve 4 is formed into an annular structure, a through via hole 121 is formed in the cylinder head 12, the second guide sleeve 4 is in interference fit with the via hole 121, the second rod portion 33 is inserted into the second guide sleeve 4, and an accommodating groove 40 which is open towards the second clamp spring 6 is formed in the second guide sleeve 4; the second snap spring 6 is positioned and matched to the via hole 121, the first sealing assembly 5 is located between the second guide sleeve 4 and the second snap spring 6, the first sealing assembly 5 is sealed between the second rod portion 33 and the cylinder cover 12, the first sealing assembly 5 comprises four first lip-shaped sealing rings 51, first elastic sealing rings 52 and second elastic sealing rings 53 which are arranged on two axial sides of the four first lip-shaped sealing rings 51, and an elastic piece 54, the lip mouths 510 of the four first lip-shaped sealing rings 51 are all opened towards the medium cavity 10, the elastic piece 54 is accommodated in the accommodating groove 40 and is in a compression state, and the elastic piece 54 is arranged on one side, far away from the medium cavity 10, of the first elastic sealing ring 52 to apply pressure to the first elastic sealing ring 52. Wherein the elastic member 54 may be selected as a spring.
In the installation process, the second guide sleeve 4 may be in interference fit with the cylinder head 12, and then the elastic member 54, the first elastic sealing ring 52, the four first lip-shaped sealing rings 51 and the second elastic sealing ring 53 are sequentially installed, and a certain pre-pressure is applied to the first sealing assembly 5, so that the second snap spring 6 is installed on the cylinder head 12, and the first sealing assembly 5 is axially fixed in the inner cavity of the cylinder head 12.
The first lip seal 51, the second lip seal 71, and the third lip seal 91 may be V-shaped seals. In an initial state, the right end face of the piston rod 3 can be flush with the right end face of the positioning ring 21; the maximum stroke S of the buffer device 100 is smaller than the distance L1 between the plug 31 and the first snap spring 23, and S is also smaller than the distance L2 between the right end face of the positioning ring 21 and the bottom of the cylinder 12 (i.e., the right side wall of the second sub-cavity 10b), so as to meet the requirement of ensuring the stroke S of the buffer device and avoid the buffer device 100 from being damaged due to collision between the piston rod 3 and the piston cylinder 1.
The movement of the plug 31 within the first sub-chamber 10a includes the plug 31 moving in a direction (e.g., from left to right in fig. 1) of the first sub-chamber 10a toward the second sub-chamber 10b, and the plug 31 moving in a direction (e.g., from right to left in fig. 1) of the second sub-chamber 10b toward the first sub-chamber 10 a. When the plug 31 moves in the first sub-cavity 10a, the plug 31 can divide the first sub-cavity 10a into a first cavity 10 and a second cavity 10d located at two axial sides of the plug 31, the first cavity 10c is communicated with the second cavity 10d through an annular gap and the throttle hole 310, the second cavity 10d is located between the first cavity 10c and the second sub-cavity 10b, and the second cavity 10d is communicated with the second sub-cavity 10b through the overflow channel 20.
When the piston rod 3 advances (the piston rod 3 moves from left to right in fig. 1), the volume of the first chamber 10c gradually increases, the volume of the second chamber 10d gradually decreases, a portion of the buffer medium 10e in the second chamber 10d flows to the first chamber 10c through the annular gap and the throttle hole 310, meanwhile, the volume of the portion of the first rod portion 32 extending into the second sub-chamber 10b gradually increases to compress the buffer medium 10e in the second sub-chamber 10b, and a portion of the buffer medium 10e in the second sub-chamber 10b can flow into the second chamber 10d through the flow passage 20. In the above process, a part of the impact energy received by the piston rod 3 can be converted into the annular space wall surface, the friction of the wall surface of the throttle hole 310 and the movement among the molecules in the buffer medium 10e for consumption, and the other part can be converted into the elastic potential energy of the buffer medium 10e for storage, thereby playing the role of buffering and absorbing energy.
When the piston rod 3 returns (the piston rod 3 moves from right to left in fig. 1), the volume of the first chamber 10c gradually decreases, the volume of the second chamber 10d gradually increases, a part of the buffer medium 10e in the first chamber 10c flows to the second chamber 10d through the annular gap and the throttle hole 310, the volume of the part of the first rod portion 32 extending into the second sub-chamber 10b gradually decreases, and a part of the buffer medium 10e in the second chamber 10d can flow into the second sub-chamber 10b through the flow passage 20. In the process, a part of the elastic potential energy stored in the buffer medium 10e can be converted into the friction of the annular space wall surface and the wall surface of the throttle hole 310 and the movement among the molecules in the buffer medium 10e for consumption, and most of the elastic potential energy is used for offsetting the impact energy received by the piston rod 3, thereby playing the roles of buffering and absorbing energy; meanwhile, the acting force applied to the first rod part 32 by the buffer medium 10e of the second sub-cavity 10b can buffer the impact load received by the piston rod 3, and can also realize quick return of the piston rod 3 to improve the return efficiency of the piston rod 3, so that when the buffer device 100 is applied to the coupler assembly 200, the buffer performance of the coupler assembly 200 can be improved, and the safety and comfort of the train 300 can be improved.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (21)

1. A cushioning device (100), comprising:
the piston cylinder (1), a medium cavity (10) is arranged in the piston cylinder (1);
the separation assembly (2) is arranged in the medium cavity (10) to separate the medium cavity (10) into a first sub cavity (10a) and a second sub cavity (10b) which are positioned at two sides of the separation assembly (2), and the separation assembly (2) is provided with an overflowing channel (20) which is communicated with the first sub cavity (10a) and the second sub cavity (10 b);
piston rod (3), piston rod (3) are including cock portion (31), first pole portion (32) and second pole portion (33), first pole portion (32) with second pole portion (33) are established respectively the both sides of cock portion (31), cock portion (31) are located in first sub-chamber (10a), just first pole portion (32) wear to locate separate subassembly (2), second pole portion (33) wear to locate piston cylinder (1).
2. The cushioning device (100) according to claim 1, characterized in that the partition assembly (2) comprises:
the outer ring of the positioning ring (21) is in positioning fit with the medium cavity (10), and the positioning ring (21) is provided with an overflowing hole (210);
the first guide sleeve (22), the first guide sleeve (22) is matched with the inner ring of the positioning ring (21), and the first rod part (32) penetrates through the first guide sleeve (22).
3. The cushioning device (100) according to claim 2, wherein the partition assembly (2) further comprises:
the first clamp spring (23) is in positioning fit with the medium cavity (10), one axial end of the positioning ring (21) abuts against the first clamp spring (23), a first positioning boss (111) is arranged in the piston cylinder (1), and the other axial end of the positioning ring (21) abuts against the first positioning boss (111).
4. The cushioning device (100) of claim 1, further comprising:
the second guide sleeve (4), the second guide sleeve (4) is embedded in a through hole (121) in the piston cylinder (1), and the second rod part (33) penetrates through the second guide sleeve (4).
5. The cushioning device (100) of claim 1, further comprising:
a first seal assembly (5), the first seal assembly (5) sealing between the second rod part (33) and the piston cylinder (1), the first seal assembly (5) comprising at least one first lip seal (51), a lip (510) of the first lip seal (51) opening out towards the media chamber (10).
6. The cushioning device (100) of claim 5, wherein the first seal assembly (5) further comprises: and a first elastic sealing ring (52) and a second elastic sealing ring (53) which are arranged on both sides of the first lip-shaped sealing ring (51).
7. The cushioning device (100) of claim 5, wherein the first seal assembly (5) further comprises: and the elastic piece (54) is arranged on one side of all the first lip-shaped sealing rings (51) far away from the medium cavity (10).
8. The cushioning device (100) of claim 7, wherein the cushioning device (100) further comprises: second uide bushing (4) and second jump ring (6), second uide bushing (4) are inlayed and are established in via hole (121) on the piston cylinder (1), second pole portion (33) are worn to locate second uide bushing (4), second jump ring (6) with the wall location fit of via hole (121), first seal assembly (5) are located second uide bushing (4) with between second jump ring (6), have in second uide bushing (4) towards the open groove (40) of accomodating of second jump ring (6), elastic component (54) are accomodate in accomodate groove (40).
9. The damping device (100) according to claim 1, characterized in that the piston cylinder (1) comprises a cylinder barrel (11) and a cylinder head (12), the cylinder head (12) being provided at an axial end of the cylinder barrel (11) and defining the medium chamber (10) with the cylinder barrel (11), the damping device (100) further comprising:
a second sealing assembly (7), the second sealing assembly (7) is sealed between the cylinder barrel (11) and the cylinder head (12), the second sealing assembly (7) comprises at least one second lip-shaped sealing ring (71), and a lip mouth (510) of the second lip-shaped sealing ring (71) is opened towards the medium cavity (10).
10. The damping device (100) according to claim 9, characterized in that the cylinder barrel (11) and the cylinder head (12) are screwed.
11. The damping device (100) according to claim 1, wherein the piston cylinder (1) is formed with an injection port (10f) communicating with the medium chamber (10), the damping device (100) further comprising:
a valve body assembly (8), the valve body assembly (8) being disposed at the injection port (10 f).
12. The cushioning device (100) of claim 11, further comprising:
a third seal assembly (9), the third seal assembly (9) being sealed between the piston cylinder (1) and the valve body assembly (8), the third seal assembly (9) comprising at least one third lip seal (91), a lip (510) of the third lip seal (91) being open towards the media chamber (10).
13. The cushioning device (100) of claim 11, wherein the valve body assembly (8) comprises:
a valve body (81), the valve body (81) having an injection passage (811) and a valve body chamber (812), the valve body chamber (812) communicating between the medium chamber (10) and the injection passage (811);
a stopper (82), the stopper (82) being disposed within the valve body cavity (812) and having a through hole (820) formed therein;
the valve ball (83) is arranged in the valve body cavity (812) and located between the blocking piece (82) and the injection channel (811), and the valve ball (83) is used for timely closing the injection channel (811).
14. The cushioning device (100) of claim 13, wherein the valve body assembly (8) further comprises:
the third clamp spring (84) is matched with the wall surface of the valve body cavity (812) in a positioning mode, one axial end of the stopper (82) abuts against the third clamp spring (84), a second positioning boss (8121) is arranged in the valve body cavity (812), and the other axial end of the stopper (82) abuts against the second positioning boss (8121).
15. The damping device (100) according to claim 13, characterized in that the piston cylinder (1) and the valve body (81) are screwed.
16. The shock absorbing device (100) according to claim 1, wherein the plug portion (31) has an orifice (310) penetrating from a process-side end surface (311) of the plug portion (31) to a return-side end surface (312) of the plug portion (31).
17. Cushioning device (100) according to any one of claims 1-16, characterized in that the piston rod (3) is in one piece.
18. The cushioning device (100) according to claim 1, characterized in that the medium chamber (10) is filled with a cushioning medium (10 e).
19. A coupler assembly (200), comprising: a hook head (101) for hooking, a base (102) for mounting to a car, and a damping device (100) connected between the hook head (101) and the base (102), the damping device (100) being a damping device (100) according to any one of claims 1 to 18.
20. A train (300), comprising: a multi-linked car (201) and a coupler assembly (200) as claimed in claim 19, adjacent said cars (201) being connected by said coupler assembly (200).
21. A rail transit system (400), comprising: a track (301) and a train (300) according to claim 20, the train (300) travelling along the track (301).
CN201910697381.6A 2019-07-30 2019-07-30 Buffer device, coupler assembly, train and rail transit system Pending CN112298262A (en)

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CN112298262A true CN112298262A (en) 2021-02-02

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Application publication date: 20210202