CN214578533U - Recovery valve auxiliary valve and hydraulic shock absorber - Google Patents

Abstract

The application relates to the technical field of hydraulic shock absorbers, in particular to a recovery valve auxiliary valve and a hydraulic shock absorber. The recovery valve auxiliary valve comprises a fixed ring, a sliding ring and an elastic piece; the fixed ring and the elastic piece are sequentially sleeved on the piston rod and are connected with the piston rod in a positioning mode, the sliding ring is sleeved outside the fixed ring and is in frictional contact with the fixed ring, meanwhile, two ends of the sliding ring are respectively abutted against the main valve plate and the elastic piece of the recovery valve, and the elastic piece can elastically deform. When the main valve plate of the recovery valve is opened and trembles due to high-frequency vibration input, the main valve plate pushes the sliding ring to move, the elastic piece is elastically deformed under the action of the sliding ring, the resilience force of the elastic piece counteracts on the sliding ring and reversely pushes the sliding ring to move, and the sliding ring can generate friction force with the fixed ring in the moving process of the sliding ring, so that the movement of the sliding ring is inhibited, the tremble of the main valve plate is inhibited, the acceleration of the piston rod is reduced, the vibration transmitted to a vehicle body by the piston rod is reduced, and the riding comfort of the vehicle is improved.

Description

Recovery valve auxiliary valve and hydraulic shock absorber

Technical Field

The application relates to the technical field of hydraulic shock absorbers, in particular to a recovery valve auxiliary valve and a hydraulic shock absorber.

Background

Hydraulic shock absorbers are commonly adopted in automobile suspension systems to accelerate the attenuation of the vibration of a frame and an automobile body and improve the riding comfort of automobiles. However, when the vehicle is driven under a bumpy road condition and high-frequency vibration is input, the conventional hydraulic damper has slow response, and a main valve plate of the recovery valve is normally open and in a tremble state in a short time, so that the vibration is transmitted to all parts of the vehicle body through a piston rod of the damper, and the riding comfort is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rebound valve auxiliary valve and hydraulic damper to solve the hydraulic damper among the prior art to a certain extent and respond the technical problem that can't restrain high frequency vibration slowly.

The utility model provides a recovery valve auxiliary valve, which is used for a recovery valve of a hydraulic shock absorber; the recovery valve auxiliary valve comprises a fixed ring, a sliding ring and an elastic piece; the fixing ring and the elastic piece are sequentially sleeved on a piston rod of the hydraulic shock absorber and are connected with the piston rod in a positioning mode, and the fixing ring is located between a main valve plate of the recovery valve and the elastic piece; the sliding ring is sleeved outside the fixed ring, and two ends of the sliding ring are respectively abutted against the main valve plate and the elastic piece; the elastic member is capable of elastic deformation in the axial direction of the piston rod.

Further, the recovery valve auxiliary valve also comprises a gasket and a fastening nut; the gasket is sleeved on the piston rod, and the fastening nut is screwed on the piston rod so as to limit and install the fixing ring and the elastic piece between the gasket and the main valve plate.

Furthermore, adjusting washers are arranged between the fixing ring and the main valve plate, between the elastic piece and the fixing ring and between the elastic piece and the gasket.

Further, the side wall of the fixing ring is provided with a friction piece, and the fixing ring is in friction contact with the sliding ring through the friction piece.

Furthermore, an annular groove is formed in the side wall of the fixing ring, and the friction piece is embedded in the annular groove.

Further, the friction piece is an O-shaped ring or an annular gasket made of rubber.

Further, the friction piece is a friction ring made of metal.

Furthermore, a first bending part is formed at one end of the sliding ring facing the main valve plate; the first bending part extends towards one side departing from the piston rod, and the first bending part is abutted against the main valve piece; one end of the sliding ring, facing the elastic piece, forms a second bending part, the second bending part extends towards one side of the piston rod, and the second bending part abuts against the elastic piece.

Further, the elastic piece is a spring piece.

The utility model also provides a hydraulic shock absorber, including rebound valve and above-mentioned arbitrary recovery valve pair valve.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a recovery valve auxiliary valve, which is used for a recovery valve of a hydraulic shock absorber; the recovery valve auxiliary valve comprises a fixed ring, a sliding ring and an elastic piece; the fixing ring and the elastic piece are sequentially sleeved on the piston rod and are connected with the piston rod in a positioning mode, and the fixing ring is located between the main valve piece of the recovery valve and the elastic piece; the slip ring cover is located outside solid fixed ring, and the inside wall of slip ring and solid fixed ring's inside wall can frictional contact, and the upper end and the main valve piece of slip ring support mutually simultaneously, and the lower extreme and the elastic component of slip ring support and lean on. Elastic deformation can take place for the elastic component, and when the elastic component received external effort, the elastic component can take place along the length direction of piston rod deformation in vertical direction promptly. When the main valve plate of the recovery valve is opened and shakes due to high-frequency vibration input, the main valve plate pushes the sliding ring to move towards the direction of the elastic piece, so that the elastic piece is subjected to acting force from the sliding ring and elastically deforms, and meanwhile, the sliding ring can move relative to the fixed ring due to the elastic deformation of the elastic piece; and along with the deformation of the elastic part, the resilience force of the elastic part also acts on the sliding ring and can reversely push the sliding ring to move. Because the inside wall of slip ring and the lateral wall frictional contact of solid fixed ring for the slip ring is at the in-process that removes, and the slip ring can produce frictional force with solid fixed ring, and restrain the removal of slip ring, thereby restrain the tremor of main valve block through the slip ring, reduce the acceleration of piston rod, reduce the vibration that the piston rod transmitted the automobile body, improve the vehicle and take the travelling comfort, also can restrain tire high frequency vibration simultaneously, reduce the road noise.

The utility model also provides a hydraulic shock absorber, include the vice valve of rebound valve, therefore hydraulic shock absorber also has the beneficial effect of the vice valve of rebound valve.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an auxiliary valve of a recovery valve provided by an embodiment of the present invention.

Reference numerals:

1-piston rod, 2-piston, 3-main valve plate, 4-fixed ring, 5-friction piece, 6-sliding ring, 7-elastic piece, 8-gasket, 9-fastening nut and 10-adjusting washer.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A rebound valve auxiliary valve and a hydraulic shock absorber according to some embodiments of the present application are described below with reference to fig. 1.

The application provides a recovery valve auxiliary valve which is used for a recovery valve of a hydraulic shock absorber; the rebound valve of the hydraulic shock absorber is arranged on a piston rod 1 of the hydraulic shock absorber, the rebound valve comprises a piston 2, a rebound valve hole and a main valve piece 3, the rebound valve hole and the main valve piece 3 are formed in the piston 2, when the piston rod 1 is stretched, the main valve piece 3 is opened, chambers on two sides of the piston 2, namely an inner upper chamber and an inner lower chamber of the shock absorber, can be communicated through the rebound valve hole, and hydraulic oil in the inner upper chamber flows into the inner lower chamber through the rebound valve hole and generates a rebound damping force. When the vehicle moves to a bumpy road section and the shock absorber vibrates at high frequency, the main valve piece 3 is opened, but the main valve piece 3 is normally opened or in a tremble state in a short time due to slow response; the restoring valve secondary valve can act on the restoring valve to suppress chattering of the main valve piece 3 of the restoring valve.

As shown in fig. 1, the restoring valve sub-valve includes a fixed ring 4, a slide ring 6, and an elastic member 7; the fixed ring 4 and the elastic piece 7 are sequentially sleeved on the piston rod 1 and are connected with the piston rod 1 in a positioning mode, and the fixed ring 4 is located between the main valve piece 3 and the elastic piece 7 of the recovery valve; the sliding ring 6 is sleeved outside the fixing ring 4, and the inner side wall of the sliding ring 6 is in frictional contact with the outer side wall of the fixing ring 4, preferably, the sliding ring 6 is in frictional contact with the fixing ring 4 through a friction piece arranged on the outer side wall of the fixing ring 4; meanwhile, the upper end of the sliding ring 6 abuts against the main valve plate 3, and the lower end of the sliding ring 6 abuts against the elastic piece 7. Elastic deformation can take place for elastic component 7, and when elastic component 7 received external effort, elastic component 7 can take place along the length direction of piston rod 1 deformation on the vertical direction promptly.

When the main valve plate 3 of the recovery valve is opened and shakes due to high-frequency vibration input, the main valve plate 3 pushes the sliding ring 6 to move towards the elastic piece 7, so that the elastic piece 7 is subjected to acting force from the sliding ring 6, the elastic piece 7 is elastically deformed, and meanwhile, the sliding ring 6 can move relative to the fixed ring 4 due to the elastic deformation of the elastic piece 7; and along with the deformation of the elastic part 7, the resilience force of the elastic part 7 also acts on the sliding ring 6 and can reversely push the sliding ring 6 to move. Because the inside wall of slip ring 6 and the outer wall frictional contact of solid fixed ring 4 for slip ring 6 is at the in-process that removes, and slip ring 6 can produce frictional force with solid fixed ring 4, and restrain the removal of slip ring 6, thereby restrain the tremor of main valve piece 3 through slip ring 6, reduce the acceleration of piston rod 1, reduce the vibration that piston rod 1 transmitted the automobile body, improve the vehicle and take the travelling comfort, also can restrain tire high frequency vibration simultaneously, reduce the road noise.

In one embodiment of the present application, it is preferable that a friction member 5 is provided on an outer sidewall of the fixing ring 4, a sidewall of the friction member 5 facing the sliding ring 6 is formed with a frictional contact surface, and the frictional contact surface of the friction member 5 protrudes a predetermined height from the outer sidewall of the fixing ring 4.

When the slip ring 6 cover was located outside solid fixed ring 4, the inside wall of slip ring 6 can closely laminate with the friction contact surface of friction piece 5 to when slip ring 6 removed solid fixed ring 4 relatively, can produce frictional force between the friction contact surface of slip ring 6 and friction piece 5, thereby realize the suppression to the main valve plate 3 trembles.

In this embodiment, the friction member 5 and the fixing ring 4 may be integrally formed, and the friction member 5 may also be detachably mounted on the outer side wall of the fixing ring 4.

Preferably, the friction member 5 is detachably connected to the fixed ring 4; an annular groove is formed on the outer side wall of the fixing ring 4, the friction piece 5 is embedded and installed in the annular groove, the friction contact surface of the friction piece 5 faces the outer side of the fixing ring 4, and the friction contact surface protrudes out of the outer side wall of the fixing ring 4 by a preset height, so that the inner side wall of the sliding ring 6 can be tightly attached to the friction contact surface of the friction piece 5, and friction force can be generated when relative movement occurs; meanwhile, since the friction member 5 is a wearing part, the friction member 5 can be easily replaced by detachably disposing the friction member 5 on the fixing ring 4.

Simultaneously, through setting up friction piece 5 and solid fixed ring 4 to be connected for dismantling, can change the specification of friction piece to the laminating compactness between adjustment slip ring 6 and the friction piece 5, thereby change the size of the frictional force that produces between slip ring 6 and the friction piece 5, in order to adapt to the damping force that the rebound valve produced. Similarly, the adjustment of the fit tightness between the slip ring 6 and the friction element 5 can be achieved by changing the specifications of the slip ring 6 and selecting slip rings 6 with different inner diameters.

Preferably, the number of the friction members 5 may be plural, and the plural friction members 5 are provided on the outer side wall of the fixing ring 4 at intervals along the length direction of the fixing ring 4.

When the number of friction member 5 is a plurality of, and friction member 5 and solid fixed ring 4 are for dismantling the connection, the annular groove's that is used for placing friction member 5 quantity also is a plurality of, a plurality of annular grooves and a plurality of friction member 5 one-to-one.

In one embodiment of the present application, the friction member 5 may be an O-ring or an annular gasket made of elastic rubber; the O-shaped ring or the annular gasket can be embedded in the annular groove and protrudes out of the outer side wall of the fixing ring 4 by a preset height; when the sliding ring 6 is sleeved on the fixing ring 4, the O-ring or the annular gasket can be clamped between the sliding ring 6 and the fixing ring 4 and elastically deformed. When the sliding ring 6 moves relative to the fixed ring 4 and the friction piece 5, a friction force with a preset magnitude is generated between the sliding ring 6 and the O-shaped ring or the annular gasket, so that the vibration of the main valve piece 3 is inhibited, and the riding comfort of a vehicle is improved.

Preferably, the friction member 5 may also be a friction member 5 made of metal, the friction member 5 is limited and fixed in the annular groove of the fixed ring 4, and the friction contact surface of the friction member 5 faces the sliding ring 6 and protrudes a predetermined height from the outer side wall of the fixed ring 4; the sliding ring 6 is in frictional contact with the frictional contact surface of the friction piece 5, so that the sliding ring 6 generates friction force when moving; the friction piece 5 is made of metal, so that the friction piece 5 is not easy to wear, and the service life of the recovery valve auxiliary valve is prolonged.

In one embodiment of the present application, the elastic member 7 is a spring plate, the spring plate is sleeved on the piston rod 1, and the spring plate is installed in a positioning manner with the piston rod 1. When the spring plate is subjected to an acting force, the spring plate can deform in the length direction of the piston rod 1, namely in the vertical direction. The lower end of the sliding ring 6 is abutted against the spring piece, and when the main valve plate 3 vibrates and pushes the sliding ring 6 to move downwards, the sliding ring 6 applies acting force to the spring piece to enable the spring piece to generate elastic deformation; meanwhile, the spring piece also applies reverse driving force to the sliding ring 6 to reversely drive the sliding ring 6 to move, so that friction force is generated when the sliding ring 6 moves.

Through the spring leaf of changing different specifications, choose for use the spring leaf that has different rigidity to the realization is to the adjustment of the resilience force of spring leaf.

In one embodiment of the present application, it is preferable that the recovery valve sub-valve further includes a washer 8 and a fastening nut 9. The gasket 8 is sleeved on the piston rod 1, so that the gasket 8 is positioned below the elastic element 7, the fastening nut 9 can be screwed on the piston rod 1, and the gasket 8 is abutted against the elastic element 7 by screwing the fastening nut 9. The elastic member 7, the fixing ring 4 and the slide ring 6 are restrained by the fastening nut 9 and the washer 8, while also avoiding endurance fatigue of the elastic member 7.

In one embodiment of the present application, preferably, an adjusting washer 10 is disposed between the fixing ring 4 and the main valve piece 3, and an adjusting washer 10 is also disposed between the fixing ring 4 and the elastic member 7 and between the elastic member 7 and the gasket 8; by changing the height of the adjusting washer 10 so that the distance between the elastic member 7 and the main valve plate 3 is adapted to the height of the sliding ring 6, the sliding ring 6 can be installed between the elastic member 7 and the main valve plate 3, and both ends of the sliding ring 6 abut against the main valve plate 3 and the elastic member 7, respectively; meanwhile, the height of the gasket 10 can be adjusted at three positions, so that the function of adjusting the resilience force of the spring pad on the sliding ring 6 can be achieved.

In one embodiment of the present application, preferably, the sliding ring 6 includes a sliding ring main body, a first bending portion and a second bending portion, and the first bending portion and the second bending portion are respectively located at two ends of the sliding ring main body and are respectively perpendicular to the sliding ring main body. The first bending part is positioned at one end of the sliding ring main body close to the main valve plate 3, extends towards one side away from the fixed ring 4, and abuts against the main valve plate 3; the second bending portion is located at one end of the sliding ring main body close to the elastic member 7, and the second bending portion extends towards one side of the fixing ring 4, and the second bending portion abuts against the elastic member 7. Through setting up first kink, increase the contact of slip ring 6 and main valve block 3 and lean on the area, through setting up the second kink, increase the contact of slip ring 6 and elastic component 7 and lean on the area to make the both ends of slip ring 6 can stably support with main valve block 3 and elastic component 7 respectively and lean on, slip ring 6 can move under the promotion of main valve block 3 and elastic component 7.

The present application further provides a hydraulic shock absorber comprising a rebound valve and the secondary valve of the rebound valve of any of the above embodiments.

In this embodiment, the hydraulic shock absorber includes the secondary valve of the rebound valve, so the hydraulic shock absorber has all the benefits of the secondary valve of the rebound valve, and the details are not repeated herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A kind of recovery valve secondary valve, is used in the recovery valve of the hydraulic shock absorber; it is characterized by comprising a fixed ring, a sliding ring and an elastic piece;

the fixing ring and the elastic piece are sequentially sleeved on a piston rod of the hydraulic shock absorber and are connected with the piston rod in a positioning mode, and the fixing ring is located between a main valve plate of the recovery valve and the elastic piece;

the sliding ring is sleeved outside the fixed ring, and two ends of the sliding ring are respectively abutted against the main valve plate and the elastic piece;

the elastic member is capable of elastic deformation in the axial direction of the piston rod.

2. The recovery valve secondary valve of claim 1 further comprising a gasket and a fastening nut;

the gasket is sleeved on the piston rod, and the fastening nut is screwed on the piston rod so as to limit and install the fixing ring and the elastic piece between the gasket and the main valve plate.

3. The auxiliary valve of claim 2, wherein an adjusting washer is disposed between the fixing ring and the main valve plate, between the elastic member and the fixing ring, and between the elastic member and the gasket.

4. The restoring valve auxiliary valve according to claim 1, wherein a friction member is provided on a side wall of the fixing ring, and the fixing ring is in frictional contact with the slide ring via the friction member.

5. The auxiliary valve of the recovery valve as set forth in claim 4, wherein an annular groove is formed on a side wall of the fixing ring, and the friction member is fitted in the annular groove.

6. The auxiliary valve of claim 4, wherein the friction member is an O-ring or an annular gasket made of rubber.

7. The auxiliary valve of claim 4, wherein the friction member is a friction ring made of metal.

8. The auxiliary valve of recovery valve as claimed in claim 1, wherein the sliding ring has a first bent portion formed at an end thereof facing the main valve plate;

the first bending part extends towards one side departing from the piston rod, and the first bending part is abutted against the main valve piece;

one end of the sliding ring, facing the elastic piece, forms a second bending part, the second bending part extends towards one side of the piston rod, and the second bending part abuts against the elastic piece.

9. The auxiliary valve of claim 8, wherein the resilient member is a leaf spring.

10. A hydraulic shock absorber comprising a rebound valve and the auxiliary valve of the rebound valve set forth in any one of claims 1 to 9.

Images