CN213899714U - Shock absorber - Google Patents

Abstract

The utility model belongs to the technical field of the bumper shock absorber and specifically relates to a bumper shock absorber. The utility model provides a following technical scheme: a shock absorber comprises an outer cylinder, an inner cylinder arranged in the outer cylinder, an oil seal seat, a guider, a piston rod, a piston valve and a bottom valve assembly, wherein an oil storage cavity is formed between the inner cylinder and the outer cylinder, the piston valve is arranged on the piston rod, the piston valve is provided with an oil passing hole, an oil outlet hole and a valve core cavity communicated with the oil passing hole and the oil outlet hole, a movable adjusting valve core is arranged in the valve core cavity, a plug body capable of blocking the oil passing hole is arranged on the adjusting valve core corresponding to the oil passing hole, a shock absorber spring mounting piece which is movable is arranged on the surface of the outer cylinder, a limiting plate capable of changing the position of the shock absorber spring mounting piece is arranged in the oil storage cavity, and an anti-foaming buffer structure is arranged in the oil storage cavity and comprises two or more than two buffer rings which are fixedly arranged in the oil storage cavity of the shock absorber along the radial direction, and a plurality of axially-through drainage holes are arranged on the ring surface. The utility model discloses can avoid the foam to produce, case sensitivity is better and can convenient regulation limiting plate height.

Description

Shock absorber

Technical Field

The utility model belongs to the technical field of the bumper shock absorber and specifically relates to a bumper shock absorber.

Background

The existing automobile shock absorber generally comprises an outer cylinder, an inner cylinder, a guider arranged in the inner cylinder, a piston rod and a bottom valve, wherein a piston valve is arranged on the piston rod, an oil storage cavity is formed between the outer cylinder and the inner cylinder, oil in the oil storage cavity can enter the inner cylinder from the bottom valve through oil pressure, an oil hole and a valve core are formed in the piston valve, and a plug body for plugging the oil hole is arranged on the valve core corresponding to the oil hole.

And a damper spring is arranged outside the damper, and the height of the damper spring is adjusted through a limiting plate. The limiting plate in the prior art comprises a threaded pipe and a threaded sleeve, a part for mounting the shock absorber spring is movably sleeved outside the shock absorber and abuts against one end of the threaded sleeve, the height of the part is changed by screwing the threaded sleeve, and the end which abuts against the shock absorber spring is moved, so that the mounting height of the shock absorber spring is adjusted.

The shock absorber in the prior art has the following three defects: when oil in the oil storage cavity flows to the bottom valve, the oil is impacted too much and collides with the inner wall to generate foams, and the foams are brought into the inner cylinder, so that the shock absorber generates noise; the oil passes through the oil passing hole, and the oil can pass through the oil passing hole only by impacting the plug body and then rushing the plug body from the oil passing hole, so that the sensitivity is insufficient; when the height of the threaded sleeve is adjusted, a tool is needed to hold the threaded pipe to keep the threaded pipe still, and then the threaded sleeve on the threaded pipe is screwed to adjust the height, which is troublesome.

Disclosure of Invention

To the problem that exists among the prior art, the utility model provides an avoid the foam to produce, case sensitivity is better and can convenient a bumper shock absorber of adjusting limiting plate height.

In order to achieve the above purpose, the utility model provides a following technical scheme: a shock absorber comprises an outer cylinder, an inner cylinder arranged in the outer cylinder, an oil seal seat, a guider, a piston rod, a piston valve and a bottom valve assembly, wherein an oil storage cavity is formed between the inner cylinder and the outer cylinder, the piston valve is arranged on the piston rod, the piston valve is provided with an oil passing hole, an oil outlet hole and a valve core cavity communicated with the oil passing hole and the oil outlet hole, a movable adjusting valve core is arranged in the valve core cavity, the adjusting valve core is provided with a plug body capable of blocking the oil passing hole corresponding to the oil passing hole, a movable shock absorber spring mounting piece and a limiting plate capable of changing the position of the shock absorber spring mounting piece through height adjustment are arranged on the surface of the outer cylinder, a foam-proof buffering structure is arranged in the oil storage cavity, the structure of the shock absorber comprises two or more than two buffering rings which are fixedly arranged in the oil storage cavity of the shock absorber along the radial direction, and a plurality of axially-through drainage holes are arranged on the ring surface at equal intervals along the circumferential direction; one end of the regulating valve core, which corresponds to the oil passing hole, is provided with a buffer spring for jacking the regulating valve core, and two ends of the buffer spring are respectively abutted against the regulating valve core and the inner wall of the valve core cavity; the limiting plate comprises a threaded pipe, a threaded sleeve and an adjusting stop block fixed on the outer cylinder, the threaded pipe is matched with the threaded sleeve through threads, a protruding block is arranged at one end, corresponding to the adjusting stop block, of the threaded pipe, and a groove capable of being inserted into the protruding block is formed in the adjusting stop block.

By adopting the technical scheme, the oil flowing in the oil storage cavity impacts the buffer rings, so that the impact force of the oil can be absorbed and the oil can be decelerated, the foam generated by the impact of the oil can be blocked by the ring surface, the decelerated oil passes through the drainage holes, so that the oil is prevented from impacting the inner wall to generate foam, when the oil passes through the first buffer ring, a small amount of foam possibly exists, and the foam can completely disappear after passing through the second buffer ring, so that double insurance can be achieved; the buffer spring can directly jack the adjusting valve core to open the oil passing hole without opening the oil passing hole through the impact of oil, so that the sensitivity of a force value is more easily achieved, and the phenomenon that the piston rod is clamped due to the fact that the plug body and the oil passing hole are combined too tightly can be avoided; the screwed pipe passes through the lug and inserts in the recess and fixed mutually with adjusting the dog to because adjusting the dog and fixing on the bumper shock absorber, the screwed pipe also is fixed mutually with the bumper shock absorber, when the height of screw thread cover is adjusted to needs, only need rotatory screw thread cover directly adjust the height can, need not like this with the help of instrument hold the screwed pipe after the height of readjustment, improved the convenience of regulation.

Further, prevent that foam buffer structure includes integrative installation department and the separation blade that sets up, the installation department sets up on the inner casing, the drainage hole sets up on the separation blade.

Adopt above-mentioned technical scheme, the setting of installation department is used for making anti-foam buffer structure and inner cylinder link to each other, prevents that the impact of fluid makes its aversion to the accessible separation blade blocks the foam that fluid striking produced.

Furthermore, the separation blade is equipped with the connection face that links to each other with the outer jar inner wall for the other end of installation department, the drainage hole sets up on being connected the face.

Adopt above-mentioned technical scheme, the setting of connecting the face is in order to make the separation blade can block the fluid that the oil storage intracavity flows, makes it contact with the separation blade to make anti-foam buffer structure can exert an effect, the drainage hole sets up on connecting the face, can avoid fluid striking position on the separation blade, and reduce the foam that fluid striking separation blade formed and pass through.

Furthermore, a sponge layer capable of absorbing foam is further arranged in the oil storage cavity.

By adopting the technical scheme, the sponge layer can also absorb the foam in the oil, so as to filter the oil foam in the oil storage cavity, thereby avoiding the foam to make the shock absorber generate noise.

Furthermore, the adjusting valve core is provided with an installation section corresponding to the buffer spring, the buffer spring is sleeved outside the installation section, and the diameter of the installation section is larger than that of the plug body but smaller than the size of the adjusting valve core.

By adopting the technical scheme, the buffer spring can be conveniently installed, and the matching between the buffer spring and the adjusting valve core is firmer.

Furthermore, the shape of the plug body is set to be a circular truncated cone, one end of the plug body corresponding to the adjusting valve core is in clearance fit with the oil passing hole, and the section size of the plug body gradually decreases towards the direction of the oil passing hole.

Adopt above-mentioned technical scheme, set up like this and can avoid the cock body and cross the cooperation between the oilhole too tightly, prevent to cause the jamming phenomenon to the removal of piston rod.

Furthermore, the threaded sleeve is also provided with a locking threaded hole and a locking screw, the locking screw is arranged in the locking threaded hole, and the tail of the locking screw can be abutted against the threaded pipe.

Adopt above-mentioned technical scheme, set up the accessible like this and screw up locking screw, make it inconsistent with the screwed pipe to carry out the locking between screwed pipe and the thread bush, can avoid the screwed pipe to take place to rotate under vibrations and cause the height to change.

Furthermore, a sealing element for sealing the adjusting valve core with the valve core cavity is arranged on the adjusting valve core, an installation groove is formed in the adjusting valve core corresponding to the sealing element, the sealing element is arranged in the installation groove and is in sealing connection with the installation groove, and the part extending out of the installation groove keeps sealed with the valve core cavity.

By adopting the technical scheme, the adjusting valve core and the valve core cavity are sealed by the sealing piece, so that oil leakage is avoided.

Furthermore, the sealing element is respectively provided with a sealing ring at the position contacting with the mounting groove and the valve core cavity, and the sealing rings are arranged along the two axial ends of the sealing element.

By adopting the technical scheme, the sealing effect of the sealing element, the mounting groove and the valve core cavity is better by the arrangement, and the movement of the valve core in the valve core cavity can be conveniently adjusted by the arrangement of the sealing ring.

Drawings

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

Fig. 2 is a schematic structural view of an anti-foaming cushioning structure.

Fig. 3 is a sectional view of the anti-foaming cushioning structure in the axial direction.

Fig. 4 is a schematic structural view of the threaded pipe.

Fig. 5 is a right side view of fig. 4.

Fig. 6 is a schematic structural view of the adjustment stopper.

Fig. 7 is a right side view of fig. 6.

Fig. 8 is an enlarged view of a portion a of fig. 1.

Fig. 9 is an enlarged view of a portion B of fig. 8.

Fig. 10 is a schematic structural view of the sealing member.

Detailed Description

The following will further describe the embodiments of the present invention with reference to the drawings and examples.

As shown in fig. 1-10, a shock absorber includes an outer cylinder 1, an inner cylinder 2 disposed in the outer cylinder 1, an oil seal seat 3, a guide 4, a piston rod 5, a piston valve 6 and a bottom valve assembly 7, an oil storage chamber 8 is formed between the inner cylinder 2 and the outer cylinder 1, the piston valve 6 is disposed on the piston rod 5, the piston valve 6 is provided with an oil passing hole 31, an oil outlet hole 32 and a valve core chamber 33 communicated with the oil passing hole 31 and the oil outlet hole 32, a movable adjusting valve core 34 is disposed in the valve core chamber 33, the adjusting valve core 34 is provided with a plug 35 corresponding to the oil passing hole 31 and capable of blocking the oil passing hole 31, a movable shock absorber spring mounting member 17 and a limiting plate capable of changing the position of the shock absorber spring mounting member 17 by adjusting the height are mounted on the surface of the outer cylinder 1, the oil storage chamber 8 is provided with an anti-foaming buffer structure, which includes two or more than two buffer rings 10 fixed in the oil storage chamber of the shock absorber along the radial direction, and a plurality of axially through drainage holes 11 are equidistantly arranged on the ring surface along the circumferential direction; one end of the regulating valve core 34 corresponding to the oil passing hole 31 is provided with a buffer spring 40 for jacking the regulating valve core 34, and two ends of the buffer spring 40 respectively abut against the regulating valve core 34 and the inner wall of the valve core cavity 33; the limiting plate includes screwed pipe 21, thread bush 22 and fixes regulation dog 23 on outer jar 1, screwed pipe 21 cooperatees through the screw thread with thread bush 22, the one end that screwed pipe 21 corresponds regulation dog 23 is equipped with lug 24, be equipped with the recess 25 that can insert lug 24 on the regulation dog 23. The oil flowing in the oil storage cavity impacts the buffer rings 10 to absorb the impact force and decelerate the buffer rings, the foam generated by the impact of the oil can be blocked by the ring surfaces, and the decelerated oil passes through the drainage holes 11, so that the oil is prevented from impacting the inner wall to generate foam; the buffer spring 40 can directly jack the adjusting valve core 34 to open the oil passing hole 31 without opening the oil passing hole 31 through the impact of oil, so that the sensitivity of a force value is more easily achieved, and the phenomenon that the piston rod moves and is clamped due to the fact that the plug body 35 is combined with the oil passing hole 31 too tightly can be avoided; the screwed pipe 21 is inserted into the groove 25 through the convex block 24 and is fixed with the adjusting stop block 23, the screwed pipe 21 is also fixed with the shock absorber because the adjusting stop block 23 is fixed on the shock absorber, when the height of the screwed sleeve 22 needs to be adjusted, the height can be directly adjusted by rotating the screwed sleeve 22, the height can be adjusted after the screwed pipe 21 is held by a tool, and the adjusting convenience is improved.

Wherein, the shock absorber spring mounting part 17 is located the other end of screwed pipe 21 and the cooperation one end of regulation dog 23, and along with the rotation of threaded bush 22, threaded bush 22 moves relative screwed pipe 21, and its height change promotes the height that shock absorber spring mounting part 17 also changes to the height of adjustable shock absorber spring.

The adjusting stop 23 is fixedly arranged on the outer cylinder 1 of the shock absorber, and can be fixed in a welding mode or an interference fit mode.

The number of the protrusions 24 and the grooves 25 may be one, two or more, and the shape thereof may be rectangular, wedge-shaped or other shapes. In this embodiment, the number of the protrusions 24 and the number of the grooves 25 are two, so that the adjustment stopper 23 and the threaded pipe 21 are more tightly matched, and the threaded pipe is uniformly stressed and not easily broken.

The anti-foaming buffer structure 10 comprises an integrally arranged installation part 12 and a separation blade 13, the installation part 12 is arranged on the inner cylinder 2, and the drainage hole 11 is arranged on the separation blade 13. The installation part 12 is provided to connect the anti-foaming buffer structure 10 to the inner cylinder 2, prevent the oil from being displaced by the impact of the oil, and block the foam generated by the oil collision by the blocking piece 13.

The fixing between the mounting portion 12 and the inner cylinder 2 may be performed by press fitting or interference fit.

A stop block 16 is arranged at one end of the connecting position of the mounting part 12 and the blocking piece 13, the stop block 16 is also integrally formed with the mounting part 12 and the blocking piece 13, and the stop block is arranged at one side close to the bottom valve assembly 7 when the anti-foaming buffer structure 10 is mounted.

The other end of separation blade 13 for installation department 12 is equipped with the face 15 of being connected with outer jar 1 inner wall, drainage hole 11 sets up on being connected face 15. The setting of being connected face 15 is for making separation blade 13 can block the fluid that flows in the oil storage chamber 8, makes it contact with separation blade 13 to make anti-foam buffer structure 10 can play a role, drainage hole 11 sets up on being connected face 15, can avoid the position that fluid struck to separation blade 13, and reduce the foam that fluid striking separation blade 13 formed and pass through.

The anti-foaming buffer structure 10 is made of rubber. The rubber has good elasticity, and when oil in high-speed operation collides the surface of the rubber, the oil can be buffered, so that the generation of foams is reduced.

A sponge layer 9 capable of absorbing foam is also arranged in the oil storage cavity 8. The sponge layer 9 can also absorb the foam in the oil liquid, and the oil liquid foam in the oil storage cavity 8 is filtered out, so that the foam is prevented from making the shock absorber generate noise.

The adjusting valve core 34 is provided with an installation section 36 corresponding to the buffer spring 40, the buffer spring 40 is sleeved outside the installation section 36, and the diameter of the installation section 36 is larger than that of the plug body 35 but smaller than the size of the adjusting valve core 34. This arrangement facilitates installation of the damping spring 40 and provides a more secure fit with the regulator valve spool 34.

The plug body 35 is in a shape of a circular truncated cone, one end of the plug body 35 corresponding to the regulating valve core 34 is in clearance fit with the oil passing hole 31, and the section size of the plug body gradually decreases towards the direction of the oil passing hole 31. The arrangement can avoid the over-tight fit between the plug body 35 and the oil passing hole 31, and prevent the clamping stagnation phenomenon caused by the movement of the piston rod.

The threaded sleeve 22 is further provided with a locking threaded hole 26 and a locking screw 27, and the locking screw 27 is arranged in the locking threaded hole 26, and the tail part of the locking screw 27 can be abutted against the threaded pipe 21. The locking screw 27 can be screwed down to abut against the threaded pipe 21, so that the threaded pipe 21 and the threaded sleeve 22 are locked, and the threaded pipe 21 can be prevented from rotating under vibration to cause height change.

The locking screw 27 is configured as a socket head cap screw, and the locking threaded hole 26 can accommodate a nut of the locking screw 27.

The regulating valve core 34 is provided with a sealing element 37 which enables the regulating valve core 34 to be sealed with the valve core cavity 33, the regulating valve core 34 is provided with a mounting groove 38 corresponding to the sealing element 37, the sealing element 37 is arranged in the mounting groove 38 and is connected with the mounting groove 38 in a sealing mode, and the part extending out of the mounting groove 38 keeps sealed with the valve core cavity 33. This arrangement seals the regulator spool 34 from the spool chamber 33 with the seal 37 to prevent oil leakage.

The number of the sealing members 37 may be 1, 2 or more than 2 as required.

The sealing member 37 is provided with sealing rings 39 at positions contacting the mounting groove 38 and the spool chamber 33, respectively, and the sealing rings 39 are provided along both axial ends of the sealing member 37. This arrangement provides a better seal of the seal 37 with the mounting groove 38 and the spool chamber 33, and the provision of the seal ring 39 facilitates movement of the regulator spool 34 in the spool chamber 33.

Claims (9)

1. The utility model provides a shock absorber, including the outer cylinder, locate inner casing, oil seal seat, director, piston rod, piston valve and bottom valve assembly in the outer cylinder, form the oil storage chamber between inner casing and the outer cylinder, the piston valve sets up on the piston rod, be equipped with on the piston valve oilhole, oil outlet and with the two communicating case chamber of case, the case intracavity is equipped with mobilizable adjusting valve core, adjusting valve core corresponds the oilhole and is equipped with the cock body that can block up the oilhole, mobilizable shock absorber spring installed part of surface mounting and the limiting plate that accessible height-adjusting of outer cylinder changed shock absorber spring installed part position, its characterized in that: the oil storage cavity is internally provided with an anti-foaming buffer structure, the structure of the anti-foaming buffer structure comprises two or more buffer rings which are fixedly arranged in the oil storage cavity of the shock absorber along the radial direction, and a plurality of axially-through drainage holes are formed in the ring surface along the circumferential direction at equal intervals; one end of the regulating valve core, which corresponds to the oil passing hole, is provided with a buffer spring for jacking the regulating valve core, and two ends of the buffer spring are respectively abutted against the regulating valve core and the inner wall of the valve core cavity; the limiting plate comprises a threaded pipe, a threaded sleeve and an adjusting stop block fixed on the outer cylinder, the threaded pipe is matched with the threaded sleeve through threads, a protruding block is arranged at one end, corresponding to the adjusting stop block, of the threaded pipe, and a groove capable of being inserted into the protruding block is formed in the adjusting stop block.

2. A shock absorber according to claim 1, wherein: the anti-foaming buffer structure comprises an integrally arranged installation part and a blocking piece, the installation part is connected with the inner cylinder, and the drainage hole is formed in the blocking piece.

3. A shock absorber according to claim 2, wherein: the separation blade is equipped with the connection face that links to each other with the outer jar inner wall for the other end of installation department, the drainage hole sets up on connecting the face.

4. A shock absorber according to claim 1, 2 or 3, wherein: a sponge layer capable of absorbing foam is further arranged in the oil storage cavity.

5. A shock absorber according to claim 1, 2 or 3, wherein: the adjusting valve core is provided with an installation section corresponding to the buffer spring, the buffer spring is sleeved outside the installation section, and the diameter of the installation section is larger than that of the plug body but smaller than the size of the adjusting valve core.

6. A shock absorber according to claim 5, wherein: the shape of the plug body is set to be a circular truncated cone shape, one end of the plug body, corresponding to the adjusting valve core, is in clearance fit with the oil passing hole, and the section size of the plug body gradually decreases towards the direction of the oil passing hole.

7. A shock absorber according to claim 6, wherein: the threaded sleeve is also provided with a locking threaded hole and a locking screw, the locking screw is arranged in the locking threaded hole, and the tail of the locking screw can be abutted to the threaded pipe.

8. A shock absorber according to claim 1 or 2 or 3 or 6 or 7, wherein: the adjusting valve core is provided with a sealing element which enables the adjusting valve core to be sealed with the valve core cavity, the adjusting valve core is provided with a mounting groove corresponding to the sealing element, the sealing element is arranged in the mounting groove and is connected with the mounting groove in a sealing mode, and the part extending out of the mounting groove keeps sealed with the valve core cavity.

9. A shock absorber according to claim 8, wherein: and the sealing element is respectively provided with a sealing ring at the position contacted with the mounting groove and the valve core cavity, and the sealing rings are arranged along the two axial ends of the sealing element.

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