CN210565969U - Cylinder type shock absorber - Google Patents

Abstract

The utility model provides a cylinder shock absorber belongs to car damping technical field. It has solved the unstable problem of current shock absorber damping effect. This cylinder shock absorber, including the oil storage cylinder, the working cylinder, piston rod and piston assembly, the piston assembly is including wearing to locate the spacing seat on the piston rod in proper order, first valve block, a piston, second valve block and lock nut, open along the axial of piston rod on the piston has first logical groove and second to lead to the groove, first valve block and second valve block are used for the first logical groove of closing cap and second respectively to lead to the groove, be equipped with first gasket between first valve block and the spacing seat, be equipped with the second gasket between second valve block and the lock nut, first valve block and second valve block all adopt elastic material to make, first valve block and second valve block can take place elasticity warpage and open first logical groove and second logical groove respectively under the pressure of fluid. The utility model discloses a first valve block and second valve block and first logical groove and the cooperation that the second led to the groove are more accurate, and the damping is more stable.

Description

Cylinder type shock absorber

Technical Field

The utility model belongs to the technical field of the car damping, a cylinder shock absorber is related to.

Background

In order to improve the comfort of the automobile during running, a shock absorption structure is usually required to be arranged in a suspension system of the automobile, at present, the shock absorption structure usually adopts a structure that an elastic element such as a spring and a damping element such as a shock absorber are installed in parallel, the impact generated during the running of the automobile is relieved through the elastic element, and the kinetic energy in the elastic element is eliminated through the damping effect generated by the shock absorber, wherein a cylinder type shock absorber is the most commonly used damping element in the suspension system of the automobile.

The basic working principle of the cylinder type shock absorber is to utilize the damping generated by the oil liquid in the shock absorber to continuously pass through the narrow valve to consume the vibration energy, for example, the piston assembly of the hydraulic shock absorber disclosed in the Chinese patent (application number: 201520821107.2), the shock absorber comprises a liquid storage cylinder, a working cylinder, a piston rod and a valve body assembly, the working cylinder is positioned in the liquid storage cylinder, the piston rod extends into the working cylinder, the valve body assembly is hermetically fixed at the bottom end of the working cylinder, the piston assembly is fixed at the tail end of the piston rod, the piston assembly comprises a circulation valve limit seat, a circulation valve spring sheet, a circulation valve, a piston, a stretching valve, a support seat ring, an adjusting washer, a stretching valve spring and a gland nut which are sequentially sleeved on the piston rod from top to bottom, when in use, the end of the piston rod and the bottom of the working cylinder are respectively connected with two objects which vibrate relatively, the circulation valve and the extension valve are opened through the oil liquid, so that the oil liquid flows back and forth between the upper cavity and the lower cavity of the working cylinder through the piston assembly. The flow valve and the extension valve provide pretightening force through the spring piece or the spring, so that the flow valve and the extension valve can move up and down relative to the piston, and the spring has the structure problem that the thicknesses of all parts of the spring cannot be completely consistent, namely one side of the spring is thick and the other side of the spring is thin, the elasticity of all parts of the spring cannot be completely consistent, the stress of all parts of the flow valve or the extension valve is unbalanced, the oil is easy to deflect when the oil pushes the flow valve or the extension valve, the oil cannot uniformly diffuse towards the circumferential direction of the flow valve or the extension valve, the vibration damping effect is unstable, and the deflection of the flow valve or the extension valve can cause the oil to be clamped on the piston rod, so that the vibration damping effect is further reduced.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a cylinder shock absorber, the utility model aims to solve the technical problem that: how to improve the stability of vibration damping.

The purpose of the utility model can be realized by the following technical proposal: a cylinder type shock absorber comprises an oil storage cylinder, a working cylinder positioned in the oil storage cylinder, a piston rod inserted in the working cylinder and a piston assembly positioned in the working cylinder and fixedly connected with the piston rod, it is characterized in that the piston assembly comprises a limiting seat, a first valve plate, a piston, a second valve plate and a locking nut which are sequentially arranged on the piston rod in a penetrating way, the piston is provided with a first through groove and a second through groove along the axial direction of the piston rod, the first valve plate and the second valve plate are respectively used for sealing the first through groove and the second through groove, a first gasket which enables a gap to be formed between the first valve plate and the limiting seat is arranged between the first valve plate and the limiting seat, a second gasket for forming a gap between the second valve plate and the lock nut is arranged between the second valve plate and the lock nut, the first valve plate and the second valve plate are made of elastic materials, and the first valve plate and the second valve plate can elastically warp under the pressure of oil and respectively open the first through groove and the second through groove.

The piston assembly of the shock absorber adopts a non-spring structure, the inner cavity of the working cylinder is divided into an upper cavity and a lower cavity by the piston, the first valve plate and the second valve plate are made of spring steel and other materials capable of generating elastic deformation, the first valve plate and the second valve plate are in a compression state, the first valve plate and the second valve plate are respectively sealed with the first through groove and the second through groove, gaps for buckling deformation of the first valve plate and the second valve plate are respectively arranged between the first valve plate and the limiting seat and between the second valve plate and the locking nut, when the piston moves downwards, the oil pressure of the lower cavity is increased, the oil in the lower cavity pushes the first valve plate to buckle deformation towards the limiting groove, the first through groove is opened by the first valve plate, the oil in the lower cavity enters the upper cavity from the first through groove, and similarly, when the piston moves upwards, the oil in the upper cavity pushes the second valve plate to buckle deformation towards one side of the locking nut, and the second valve plate opens the second through groove, the oil in the upper cavity enters the lower cavity through the second through groove, and the piston rod drives the oil in the working cylinder to flow and consume the vibration energy when vibrating up and down relative to the working cylinder. Because first valve block and second valve block are directly fixed in the piston rod through the tight fit in the present case, make first valve block and second valve block and first logical groove and the cooperation precision that the second led to the groove remain the invariant throughout, first valve block and second valve block only determine its size of warping according to the pressure magnitude that receives, the size that first logical groove or second led to the groove of deciding to open promptly according to the atress size, make piston assembly's job stabilization nature higher, damping effect is better.

Moreover, when first valve block and second valve block atress were too big, first valve block and second valve block can lean on with spacing seat or lock nut and lean on, avoid first valve block and second valve block because of warping too big and lead to losing efficacy, and job stabilization nature is better.

In the above cylinder type shock absorber, a first throttling piece is further arranged between the first valve plate and the piston, a second throttling piece is further arranged between the second valve plate and the piston, the first throttling piece and the second throttling piece are both made of elastic materials capable of being elastically warped, a first throttling groove communicated with the first through groove is formed in the outer peripheral surface of the first throttling piece, and a second throttling groove communicated with the second through groove is formed in the outer peripheral surface of the second throttling piece.

The openings of the first throttling groove and the second throttling groove are smaller, so that the first throttling groove and the second throttling groove can play a role in guiding oil without influencing the damping effect of the piston assembly, when the piston moves downwards, the oil in the lower cavity can directly pass through the first throttling groove from the first through groove to enter the upper cavity, and the oil in the lower cavity is guided to push the first throttling piece and the first valve piece away, so that the first valve piece is conveniently and stably opened; similarly, when the piston moves upwards, the second through groove is conveniently opened by oil in the upper cavity due to the arrangement of the second throttling groove.

In the above cylinder shock absorber, the first through groove is located outside the second through groove, and the first through groove and the second through groove are uniformly distributed at intervals around the axial lead of the piston. Therefore, the first throttling piece, the first valve plate, the second throttling piece and the second valve plate are stressed more uniformly, and the oil liquid circulation stability in the working cylinder is better.

In the above-mentioned cylinder shock absorber, the end face of the piston facing the first throttle blade is provided with three coaxial annular bosses with successively increasing diameters, each first through groove is located between two adjacent annular bosses with larger diameters, and each second through groove is located between two adjacent annular bosses with smaller diameters. First throttle blade is direct to form the laminating with annular boss and is sealed, and each first logical groove and each second lead to the groove homoenergetic and form the intercommunication respectively between two annular bosses, further improves the force balance nature of each first throttle blade and first valve block.

In the above-described tube damper, the width of the annular boss is reduced in the bottom-to-top direction in order. Like this, the area of contact of first throttle piece and annular boss is littleer, and pressure is bigger, makes the sealed effect between first throttle piece and the annular boss better more stable, forms the flaring form between two adjacent annular bosses moreover, and the fluid of being convenient for gets into the second between two annular bosses and leads to the groove.

In the tube damper, the second valve plates are two adjacent to each other.

In the above-mentioned tubular shock absorber, the lock nut is a self-locking nut.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses an among the piston assembly, first valve block and second valve block are all direct to be fixed through the relative piston of tight fit, and the elasticity warpage that only passes through first valve block or second valve block self opens first logical groove or second and leads to the groove, makes first valve block, second valve block and first logical groove and second logical groove cooperation more accurate, and stability is better.

2. A first throttle piece and a second throttle piece are respectively arranged between the first valve plate and the piston and between the second valve plate and the piston, so that a stable passage is formed between the first through groove and the upper cavity and between the second through groove and the upper cavity, and oil can be more stably guided to push the first valve plate or the second valve plate away so as to open the first through groove or the second through groove.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of a piston assembly;

FIG. 3 is an enlarged view of portion a of FIG. 2;

FIG. 4 is an enlarged view of portion b of FIG. 2;

FIG. 5 is a top view of the first valve plate;

FIG. 6 is a top view of the first throttle plate;

FIG. 7 is a plan view of the second valve plate;

FIG. 8 is a plan view of the second valve sheet.

In the figure, 1, a reserve tube; 2. a working cylinder; 3. a piston rod; 4. a piston assembly; 41. a limiting seat; 41a, flow guide holes; 42. a first gasket; 43. a first valve plate; 43a, a relief hole; 44. a first throttle blade; 44a, a first throttle groove; 44b, a yielding groove; 45. a piston; 451. a first through groove; 452. a second through groove; 453. an annular boss; 46. a second throttle plate; 47. a second valve plate; 48. a second gasket; 49. locking the nut; 5. a bottom valve assembly.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

A cylinder type vibration damper, as shown in figure 1, comprises an oil storage cylinder 1, a working cylinder 2, a piston assembly 4 fixedly connected with a piston rod 3, wherein the oil storage cylinder 1 and the working cylinder 2 are both cylindrical, the working cylinder 2 and the oil storage cylinder 1 are coaxially inserted into the oil storage cylinder 1, an oil storage cavity is formed between the oil storage cylinder 1 and the working cylinder 2, the bottom of the working cylinder 2 is provided with a bottom valve assembly 5, the piston rod 3 is inserted into the working cylinder 2, the upper end of the piston rod 3 extends out of the working cylinder 2, the piston assembly 4 is positioned in the working cylinder 2 and is fixedly connected with the lower end of the piston rod 3, the piston assembly 4 divides the working cylinder 2 into an upper cavity and a lower cavity, the upper end of the piston rod 3 and the lower end of the working cylinder 2 are respectively connected with two objects vibrating relatively, when a piston 45 moves up and down along with the piston rod 3, oil in the working cylinder 2 flows between the upper cavity and the lower cavity through, the damping effect is achieved.

Specifically, as shown in fig. 2 to 8, the piston assembly 4 includes a limiting seat 41, a first gasket 42, a first valve plate 43, a first throttle plate 44, a piston 45, a second throttle plate 46, a second valve plate 47, a second gasket 48 and a lock nut 49, which are sequentially and tightly inserted on the piston rod 3 from top to bottom, the cross sections of the limiting seat 41, the first gasket 42, the first valve plate 43, the first throttle plate 44, the piston 45, the second throttle plate 46, the second valve plate 47 and the second gasket 48 are all substantially circular, wherein the piston 45 is provided with a first through groove 451 and a second through groove 452 which are axially formed along the piston rod 3, the first valve plate 43 and the first throttle plate 44 are located at the upper end of the piston 45 and cover the first through groove 451, the second valve plate 47 and the second throttle plate 46 are located at the lower end of the piston 45 and cover the second through groove 452, the diameter of the first gasket 42 is smaller than the diameters of the limiting seat 41, the first throttle plate 43 and the first throttle plate 44, in the scheme, the first valve plate 43, the first throttle plate 44, the second valve plate 47 and the second throttle plate 46 are made of spring steel and other materials, when the piston 45 moves downwards, the oil in the lower cavity pushes the first throttle plate 44 and the first valve plate 43 through the first through groove 451, so that the first throttle plate 44 and the first valve plate 43 generate elastic warping in the direction of the limiting seat 41, a gap for oil to pass through is formed between the first throttle plate 44 and the piston 45, and the oil in the lower cavity enters the upper cavity; similarly, when the piston 45 moves upward, the oil in the upper chamber pushes the second throttle blade 46 and the second valve blade 47 through the second through groove 452, so that the second throttle blade 46 and the second valve blade 47 elastically warp in the direction of the lock nut 49 and the second through groove 452 is opened, and the oil in the upper chamber enters the lower chamber. Because the first throttle blade 44, the first valve plate 43, the second throttle blade 46 and the second valve plate 47 form a relatively fixed whole with the piston 45 through the limit of the limit seat 41 and the lock nut 49, the opening of the first through groove 451 and the second through groove 452 is only opened through the elastic warping of the first throttle blade 44, the first valve plate 43, the second throttle blade 46 and the second valve plate 47, thereby ensuring the matching precision and stability between the first throttle blade 44, the first valve plate 43, the second throttle blade 46 and the second valve plate 47 and the first through groove 451 and the second through groove 452, and further ensuring the damping effect of the damper to be more stable.

Further, as shown in fig. 2, 3, 4, 6, and 7, the first through groove 451 and the second through groove 452 are both provided in plural numbers around the piston rod 3, in this embodiment, the number of the first through groove 451 is nine, the number of the second through groove 452 is four, the first through groove 451 is located at the outer side of the second through groove 452, the first valve plate 43 is provided with a plurality of yielding holes 43a, the first throttle plate 44 is provided with a plurality of yielding grooves 44b, the limit seat 41 is also provided with a plurality of diversion holes 41a, the yielding holes 43a, the yielding grooves 44b, and the diversion holes 41a are all opposite to the second through groove 452, so that the oil in the upper chamber can conveniently enter the second through holes 452 through the diversion holes 41a, the yielding holes 43a, and the yielding grooves 44 b. The second orifice 46 and the second valve plate 47 have a relatively small diameter to prevent the second through groove 452 from being blocked. The outer peripheral surface of the first throttling sheet 44 is provided with a plurality of first throttling grooves 44a at intervals along the circumferential direction, in the embodiment, the number of the first throttling grooves 44a is the same as that of the first through grooves 451, the first throttling grooves 44a are communicated with the first through grooves 451, the openings of the first throttling grooves 44a are small, and therefore oil in the lower cavity can conveniently pass through the first through grooves 451 and push the first throttling sheet 44 and the first valve plate 43 open to form stable radial flow. Similarly, a plurality of second throttle grooves communicating with the second through grooves 452 are also circumferentially formed in the outer peripheral surface of the second throttle plate 46 so that the second through grooves 452 are opened by the oil in the upper chamber.

As shown in fig. 2, 3, and 4, each of the upper end surfaces of the pistons 45 has three annular bosses 453, the three annular bosses 453 are all located on the same axial line as the piston 45, the diameter sides of the three annular bosses 453 are increased, each of the first through grooves 451 is located between two adjacent annular bosses 453 having a larger diameter, each of the second through grooves 452 is located between two adjacent annular bosses 453 having a smaller diameter, the first throttle plate 44 abuts against each of the annular bosses 453, the first throttle plate 44 covers each of the first through grooves 451, and the first through grooves 451 and each of the second through grooves 452 communicate between the adjacent two annular bosses 453. Moreover, in this embodiment, the width of the annular boss 453 all reduces in proper order along the direction from the bottom to the top, so that the area of the annular boss 453 attached to the first throttle blade 44 is smaller, the pressure is higher, the sealing effect is better, and moreover, an expanding shape is formed between the adjacent annular bosses 453, so that oil can conveniently enter the second through groove 452.

Further, in this embodiment, the number of the second valve plates 47 is two, so that the elastic force provided by the second valve plates 47 is larger and more stable, the pressure required by the oil to open the second valve plates 47 is larger, and the energy absorption and vibration reduction effects are better.

Furthermore, in this embodiment, the lock nut 49 is an all-metal self-locking nut, so that the lock nut 49 and the piston rod 3 are more stably connected, thereby ensuring the connection stability between the components of the piston assembly 4 and making the vibration damper work more stably.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms reserve tube 1, working tube 2, piston rod 3, piston assembly 4, etc. are used more extensively herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (7)

1. A cylinder type shock absorber comprises an oil storage cylinder (1), a working cylinder (2) positioned in the oil storage cylinder (1), a piston rod (3) inserted in the working cylinder (2) and a piston assembly (4) positioned in the working cylinder (2) and fixedly connected with the piston rod (3), and is characterized in that the piston assembly (4) comprises a limiting seat (41), a first valve plate (43), a piston (45), a second valve plate (47) and a locking nut (49) which are sequentially arranged on the piston rod (3) in a penetrating manner, a first through groove (451) and a second through groove (452) are formed in the piston (45) along the axial direction of the piston rod (3), the first valve plate (43) and the second valve plate (47) are respectively used for sealing the first through groove (451) and the second through groove (452), and a first gasket (42) for forming a gap between the first valve plate (43) and the limiting seat (41) is arranged between the first valve plate (43) and the limiting seat (41), be equipped with between second valve block (47) and lock nut (49) and make second valve block (47) and lock nut (49) between form second gasket (48) in clearance, first valve block (43) and second valve block (47) can take place elasticity warpage and open first logical groove (451) and second logical groove (452) respectively under the pressure of fluid.

2. The tube type shock absorber according to claim 1, wherein a first throttling piece (44) is further arranged between the first valve plate (43) and the piston (45), a second throttling piece (46) is further arranged between the second valve plate (47) and the piston (45), the first throttling piece (44) and the second throttling piece (46) are both made of elastic materials capable of being elastically warped, a first throttling groove (44a) communicated with the first through groove (451) is formed in the outer peripheral surface of the first throttling piece (44), and a second throttling groove communicated with the second through groove (452) is formed in the outer peripheral surface of the second throttling piece (46).

3. A tube damper according to claim 2, characterized in that the first through groove (451) is located outside the second through groove (452), and the first through groove (451) and the second through groove (452) are both evenly spaced around the axial center line of the piston (45).

4. A tube damper according to claim 3, characterized in that the piston (45) has, on its end face facing the first restrictor plate (44), three concentric annular bosses (453) of successively larger diameter, each first through groove (451) being located between two adjacent annular bosses (453) of larger diameter and each second through groove (452) being located between two adjacent annular bosses (453) of smaller diameter.

5. The tube damper according to claim 4, characterized in that the width of the annular boss (453) decreases in the bottom-to-top direction.

6. A tube damper according to claim 1 or 2 or 3 or 4, characterized in that the second valve plate (47) is two abutting.

7. A tube damper according to claim 1 or 2 or 3 or 4, characterized in that the locking nut (49) is a self-locking nut.

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