CN212055641U

CN212055641U - Oil seal device for piston rod of shock absorber

Info

Publication number: CN212055641U
Application number: CN202020534448.2U
Authority: CN
Inventors: 徐勤燕
Original assignee: Qingdao Ankai Power Co ltd
Current assignee: Qingdao Ankai Power Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-12-01
Anticipated expiration: 2030-04-13

Abstract

The utility model discloses a shock absorber piston rod oil seal device, including the outer tube, the inside bottom cover of outer tube is equipped with the piston, the intermediate position department in the piston outside is provided with first sealing washer, the intermediate position department at piston top is provided with the piston rod, the top of piston rod extends the inside of outer tube, the top of outer tube is provided with the end cover, the non-centre of a circle department at end cover top is sealed evenly is provided with four groups first fastening bolt, the top in the piston rod outside is equipped with piston rod uide bushing and second sealing washer respectively; the utility model discloses the device is through the extrusion to the sealing washer for the inseparable and piston rod mutual slip adaptation of sealing washer prevents the leakage of oil, reduces the poor condition of appearance shock attenuation effect of bumper shock absorber, and the uide bushing of piston rod prevents to appear squinting in the removal in-process of piston rod, reduces the wearing and tearing to the sealing washer, improves the life of sealing washer.

Description

Oil seal device for piston rod of shock absorber

Technical Field

The utility model relates to an oil blanket technical field specifically is a bumper shock absorber piston rod oil blanket device.

Background

The shock absorber is mainly used for inhibiting the shock when the spring absorbs the shock and rebounds and the impact from the road surface, when the spring passes through the uneven road surface, although the shock absorbing spring can filter the shock of the road surface, the spring can still do reciprocating motion, the shock absorber is used for inhibiting the spring from jumping, the shock absorber is structurally characterized in that a piston rod with a piston is inserted into a cylinder, the cylinder is filled with oil, an orifice is formed in the piston, so that the oil in two parts of spaces separated by the piston can be supplemented with each other, the damping is generated when the viscous oil passes through the orifice, the smaller the orifice is, the larger the damping force is, the larger the viscosity of the oil is, and the larger the damping force is;

there are problems in the use of the existing shock absorber:

1. because the piston rod deviates after being used for a long time, the piston rod slides in the shock absorber in a reciprocating manner, so that the sealing ring is abraded, and the shock absorption effect of the shock absorber is shortened;

2. meanwhile, under the existing condition, the sealing ring is directly sleeved in the end cover and is in sliding fit with the piston rod, but the sealing ring possibly has poor sealing effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bumper shock absorber piston rod oil blanket device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a shock absorber piston rod oil sealing device comprises an outer sleeve, wherein a piston is sleeved at the bottom of the inner portion of the outer sleeve, a first sealing ring is arranged at the middle position of the outer side of the piston, a piston rod is arranged at the middle position of the top of the piston, the top of the piston rod extends out of the inner portion of the outer sleeve, a sealing end cover is arranged at the top of the outer sleeve, four groups of first fastening bolts are uniformly arranged at the non-circle center of the top of the sealing end cover, a piston rod guide sleeve and a second sealing ring are respectively sleeved at the top of the outer side of the piston rod, four groups of movable cavities are arranged at the middle position of the inner side of the sealing end cover, triangular blocks are arranged on one sides, far away from the bottoms of the inner portions of the four groups of movable cavities, through grooves are formed in the tops of the four groups of movable cavities, a, the top of four groups the spout all is provided with the nut, four groups the inside threaded connection of nut has second fastening bolt, the inside that spout and logical groove are run through to the bottom of second fastening bolt extends to the inside in activity chamber, four groups second fastening bolt's bottom all is provided with the gag lever post, four groups one side that the gag lever post is close to the second sealing washer is provided with the pressure strip.

Preferably, the pressure strip is of a circular arc-shaped structure, and one side of the pressure strip, which is close to the second seal ring, is provided with raised grains.

Preferably, one side of the limiting rod, which is close to the sliding groove, is obliquely arranged, and the oblique edge is matched with the oblique edge of the sliding groove.

Preferably, the bottom of the outer side of the second fastening bolt is sleeved with a bearing, and the bearing is fixedly connected with the top of the limiting rod.

Preferably, a gasket is arranged between the sealing end cover and the outer sleeve, and the gasket is made of rubber.

Preferably, the bottom of the first fastening bolt extends to the inside of the outer sleeve, and the first fastening bolt is in threaded connection with the outer sleeve.

Compared with the prior art, the beneficial effects of the utility model are that: the oil seal device for the piston rod of the shock absorber enables the seal ring to be in sliding fit with the piston rod tightly through extrusion of the seal ring, oil leakage is prevented, the situation of poor shock absorption effect of the shock absorber is reduced, meanwhile, the guide sleeve of the piston rod is arranged, deviation in the moving process of the piston rod is prevented, abrasion to the seal ring is reduced, and the service life of the seal ring is prolonged;

1. through the mutual matching of the movable cavity, the pressing plate, the pressing cover, the nut, the second fastening bolt, the through groove, the limiting rod and the sliding groove, the pressing cover and the sealing end cover can be fixed mutually, meanwhile, the pressing plate can be driven under the action of the limiting rod and the sliding groove, the second sealing ring is extruded, so that the second sealing ring is precisely attached to the piston rod to prevent oil in the outer sleeve from leaking, and the damping effect of the damper is improved;

2. through the mutual cooperation between piston rod uide bushing, end cover and the compression cap, the piston rod uide bushing can carry out auxiliary stay to the piston rod, prevents that the piston rod from appearing the skew at the in-process that removes, reduces the wearing and tearing to the sealing washer, improves the life of sealing washer.

Drawings

Fig. 1 is a front sectional view of the present invention;

fig. 2 is an enlarged view of fig. 1 at a according to the present invention;

fig. 3 is a top view of the present invention;

fig. 4 is a front view of the present invention.

In the figure: 1. an outer sleeve; 2. a piston rod; 3. a piston; 4. a first seal ring; 5. a first fastening bolt; 6. a piston rod guide sleeve; 7. sealing the end cap; 8. a movable cavity; 9. a compression plate; 10. a second seal ring; 11. a compression cover; 12. a nut; 13. a second fastening bolt; 14. a through groove; 15. a limiting rod; 16. a chute.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

Referring to fig. 1-4, the present invention provides an embodiment: a shock absorber piston rod oil sealing device comprises an outer sleeve 1, wherein a piston 3 is sleeved at the bottom inside the outer sleeve 1, a first sealing ring 4 is arranged at the middle position outside the piston 3, a piston rod 2 is arranged at the middle position on the top of the piston 3, the top of the piston rod 2 extends out of the inside of the outer sleeve 1, a sealing end cover 7 is arranged at the top of the outer sleeve 1, four groups of first fastening bolts 5 are uniformly arranged at the non-circle center position on the top of the sealing end cover 7, a piston rod guide sleeve 6 and a second sealing ring 10 are respectively sleeved at the top outside the piston rod 2 to prevent the piston rod 2 from deviating, four groups of movable cavities 8 are respectively arranged at the middle position inside the sealing end cover 7, triangular blocks are arranged on the sides, far away from each other, of the bottoms inside the four groups of movable cavities 8, through grooves 14 are arranged, four groups of sliding grooves 16 are uniformly formed in the non-circle center of the top of the pressing cover 11, nuts 12 are arranged on the tops of the four groups of sliding grooves 16, second fastening bolts 13 are connected to the inner threads of the four groups of nuts 12, the bottoms of the second fastening bolts 13 penetrate through the sliding grooves 16 and the inner portions of the through grooves 14 and extend to the movable cavity 8, limiting rods 15 are arranged at the bottoms of the four groups of second fastening bolts 13, a pressing plate 9 is arranged on one side, close to the second sealing ring 10, of the four groups of limiting rods 15, and the second sealing ring 10 is tightly pressed.

In this embodiment, the pressing plate 9 is in a circular arc structure, and one side of the pressing plate 9 close to the second sealing ring 10 is provided with raised grains, the second sealing ring 10 is pressed more tightly, one side of the limiting rod 15 close to the sliding chute 16 is arranged in an inclined way, and the bevel edge is matched with the bevel edge of the chute 16, so that the limiting rod 15 can move back and forth, the bottom of the outer side of the second fastening bolt 13 is sleeved with a bearing, and the bearing is fixedly connected with the top of the limiting rod 15, so that the second fastening bolt 13 can rotate on the limiting rod 15, a gasket is arranged between the sealing end cover 7 and the outer sleeve 1, the gasket is made of rubber, the sealing performance between the sealing end cover 7 and the outer sleeve 1 is enhanced, the bottom of the first fastening bolt 5 extends into the outer sleeve 1, and the first fastening bolt 5 is in threaded connection with the outer sleeve 1, so that the sealing end cover 7 is connected with the outer sleeve 1.

The working principle is as follows: after the shock absorber is assembled, the second fastening bolt 13 is rotated, when the second fastening bolt 13 rotates, under the action of the nut 12, the second fastening bolt 13 moves downwards, the second fastening bolt 13 drives the limiting rod 15 to move downwards, the inclined edge of the limiting rod 15 slides on the inclined edge of the sliding groove 16, so that the limiting rod 15 moves towards the second sealing ring 10, the limiting rod 15 drives the pressing plate 9 to approach the second sealing ring 10 until the second sealing ring 10 is pressed tightly, the second sealing ring 10 is tightly attached to the piston rod 2, meanwhile, the second fastening bolt 13 drives the nut 12 to slide in the sliding groove 16, the sealing end cover 7 and the pressing cover 11 are precisely fixed together, and the firmness of the shock absorber is improved;

be provided with piston rod uide bushing 6 in the inside of bumper shock absorber, piston rod uide bushing 6 carries out the auxiliary stay to piston rod 2 for piston rod 2 prevents that skew from appearing in piston rod 2 when removing under piston rod uide bushing 6's spacing, reduces the wearing and tearing to the sealing washer, has improved the life of sealing washer.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a bumper shock absorber piston rod oil blanket device, includes outer tube (1), its characterized in that: the bottom of the inner part of the outer sleeve (1) is sleeved with a piston (3), the middle position of the outer side of the piston (3) is provided with a first sealing ring (4), the middle position of the top of the piston (3) is provided with a piston rod (2), the top of the piston rod (2) extends out of the inner part of the outer sleeve (1), the top of the outer sleeve (1) is provided with a sealing end cover (7), the non-circle center of the top of the sealing end cover (7) is uniformly provided with four groups of first fastening bolts (5), the top of the outer side of the piston rod (2) is respectively sleeved with a piston rod guide sleeve (6) and a second sealing ring (10), the middle position of the inner side of the sealing end cover (7) is provided with four groups of movable cavities (8), one side of the inner part of the four groups of movable cavities (8) far away from each other is provided with a triangular block, the top of end cover (7) is provided with compresses tightly lid (11), compress tightly the non-centre of a circle department at lid (11) top and evenly be provided with four groups spout (16), four groups the top of spout (16) all is provided with nut (12), four groups the inside threaded connection of nut (12) has second fastening bolt (13), the inside that spout (16) and logical groove (14) were run through to the bottom of second fastening bolt (13) extends to the inside in activity chamber (8), four groups the bottom of second fastening bolt (13) all is provided with gag lever post (15), four groups one side that gag lever post (15) are close to second sealing washer (10) is provided with pressure strip (9).

2. The oil seal device for the piston rod of the shock absorber as claimed in claim 1, wherein: the pressing plate (9) is of a circular arc-shaped structure, and wave grains are arranged on one side, close to the second sealing ring (10), of the pressing plate (9).

3. The oil seal device for the piston rod of the shock absorber as claimed in claim 1, wherein: one side of the limiting rod (15) close to the sliding groove (16) is obliquely arranged, and the oblique edge is matched with the oblique edge of the sliding groove (16).

4. The oil seal device for the piston rod of the shock absorber as claimed in claim 1, wherein: the bottom outside the second fastening bolt (13) is sleeved with a bearing, and the bearing is fixedly connected with the top of the limiting rod (15).

5. The oil seal device for the piston rod of the shock absorber as claimed in claim 1, wherein: a gasket is arranged between the sealing end cover (7) and the outer sleeve (1), and the gasket is made of rubber.

6. The oil seal device for the piston rod of the shock absorber as claimed in claim 1, wherein: the bottom of the first fastening bolt (5) extends to the inside of the outer sleeve (1), and the first fastening bolt (5) is in threaded connection with the outer sleeve (1).