CN217152810U

CN217152810U - Assembly structure of director and oil blanket of bumper shock absorber

Info

Publication number: CN217152810U
Application number: CN202121308952.1U
Authority: CN
Inventors: 李芳�; 郑德武; 刘燕芳
Original assignee: Qingdao Wisdom Oil Seal Co ltd
Current assignee: Qingdao Wisdom Oil Seal Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2022-08-09
Anticipated expiration: 2031-06-10

Abstract

The utility model relates to a bumper shock absorber assembly technique specifically is an assembly structure of director and oil blanket of bumper shock absorber, including urceolus, director, oil blanket, supplementary collar, director and oil blanket are all installed in the inside of urceolus, the oil blanket is including vulcanizing in the metal framework and the rubber body of an organic whole, the lower extreme of the rubber body is equipped with the annular seal, the upper end of director is equipped with annular boss, supplementary collar adopts the rubber material, supplementary collar cover is established in the outside of annular boss, the outside at supplementary collar is established to annular seal cover, the inner wall interference fit of annular seal and urceolus. The utility model discloses a set up the supplementary collar of rubber material, the prepositioning of supplementary director and oil blanket to reduce the pressure equipment number of times in director and the oil blanket assembling process, improved the assembly efficiency of bumper shock absorber.

Description

Assembly structure of guider and oil seal of shock absorber

Technical Field

The utility model relates to a bumper shock absorber assembly technique specifically is an assembly structure of director and oil blanket of bumper shock absorber.

Background

Hydraulic shock absorbers are widely used in automobile shock absorbing systems, in which when the frame and the axle make reciprocal relative motion, the piston (the piston rod is connected with the frame or the automobile body) reciprocates in the cylinder (the cylinder is connected with the axle) of the shock absorber, and when the piston reciprocates in the cylinder, the oil in the housing repeatedly flows from one chamber to another chamber through narrow apertures. Due to the throttling function of the small holes, the friction between the hole walls and the oil liquid and the friction in liquid molecules form damping force to vibration, so that the vibration energy of the vehicle body and the vehicle frame is converted into heat energy, absorbed by the oil liquid and the shock absorber shell and then emitted to the atmosphere.

The guide is an important component in the shock absorber, and mainly plays a role of guiding the up-and-down movement of the piston rod of the shock absorber. Fig. 1 shows a conventional shock absorber, which comprises an outer cylinder 1, a guider 2 and an oil seal 3, wherein the oil seal 3 comprises a metal framework 4 and a rubber body 5 which are vulcanized into a whole, an annular sealing body 6 is arranged at the lower end of the rubber body 5, and an annular boss 7 is arranged at the upper end of the guider 2. During assembly, the annular sealing body 6 is sleeved outside the annular boss 7, and the annular boss 7 outwards supports the annular sealing body 6, so that the annular sealing body 6 is in interference fit with the outer barrel 1, and a sealing effect is achieved. The installation process of the guider 2 and the oil seal 3 is that the guider 2 is firstly installed in the outer cylinder 1, and then the oil seal 3 is installed in the outer cylinder 1. The existing assembly method needs to carry out positioning and press fitting twice, and the assembly efficiency of the shock absorber is influenced. To improve efficiency, technicians have tried other assembly methods: 1. if the guider and the oil seal are firstly installed into a whole, the annular sealing body can be outwards propped by the annular boss, at the moment, the outer diameter of the annular sealing body is larger than the inner diameter of the outer cylinder (see the dotted line part in figure 1), so that the guider and the oil seal are difficult to install into the outer cylinder, and the annular sealing body is damaged due to the shearing force of the end part of the outer cylinder in the installation process. 2. If the oil seal and the guider are pre-positioned, namely, part of the annular sealing body is sleeved outside the annular boss and an axial gap is reserved, the purpose is to integrate the oil seal and the guider without influencing the insertion of the oil seal into the outer cylinder, but the static friction force between the annular sealing body made of rubber and the annular boss made of metal is not enough to maintain the pre-positioning state of the annular sealing body made of rubber and the annular boss made of metal, so the assembly method cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the not enough of above-mentioned prior art, provide an assembly structure of director and oil blanket of bumper shock absorber, through the supplementary collar that sets up the rubber material, the prepositioning of supplementary director and oil blanket to reduce the pressure equipment number of times in director and the oil blanket assembling process, improve the assembly efficiency of bumper shock absorber.

The technical problem to be solved is realized by adopting the following technical scheme: the utility model provides an assembly structure of director and oil blanket of bumper shock absorber, includes urceolus, director, oil blanket, supplementary collar, director and oil blanket are all installed in the inside of urceolus, the oil blanket is including vulcanizing in the metal framework and the rubber body of an organic whole, the lower extreme of the rubber body is equipped with annular seal, the upper end of director is equipped with annular boss, supplementary collar adopts the rubber material, supplementary collar is established in the outside of annular boss, the outside at supplementary collar is established to annular seal cover, the inner wall interference fit of annular seal and urceolus.

The utility model also provides an assembly method according to director and oil blanket of foretell bumper shock absorber, including following step:

A. sleeving the auxiliary mounting ring outside the annular boss;

B. pre-positioning the oil seal and the guider, namely sleeving part of the annular sealing body outside the auxiliary mounting ring, and reserving an axial gap between the annular sealing body and the guider;

C. and pressing the oil seal and the guider into the outer cylinder together, and continuously applying pressure to the oil seal after the guider is positioned until the axial clearance is eliminated.

Compared with the prior art, the utility model discloses the beneficial effect of the guide of bumper shock absorber and the assembly structure of oil blanket does: the auxiliary mounting ring is sleeved outside the annular boss and then can be spread outwards by the annular boss, but the auxiliary mounting ring is small in size, so that the auxiliary mounting ring cannot be inserted into the outer cylinder; because the auxiliary mounting ring is made of rubber, the static friction force between the auxiliary mounting ring and the annular sealing body made of rubber is enough to enable the oil seal and the guider to keep a pre-positioning state, and the pre-positioning state of the oil seal and the guider can enable the oil seal and the guider to be pressed into the outer barrel together and can not cause the annular sealing body to be subjected to the shearing force of the outer barrel. To sum up, the utility model discloses reduce the pressure equipment number of times in director and the oil blanket assembling process, improved the assembly efficiency of bumper shock absorber.

The technical proposal of the utility model is also that: the outer side surface of the annular boss is in a conical shape with a small upper part and a large lower part, and the inner side surface of the annular sealing body is in a conical shape with a small upper part and a large lower part. In this scheme, the toper lateral surface of annular boss and the toper medial surface of annular seal all play the effect of simplifying the assembly, make the annular boss change and insert supplementary collar and annular seal.

Drawings

Fig. 1 is a schematic structural diagram of a shock absorber in the prior art.

Fig. 2 is a schematic view illustrating an assembly structure of a guide and an oil seal of a shock absorber according to an embodiment.

Fig. 3 is an exploded view of the deflector, oil seal, and mounting ring in the first embodiment.

Fig. 4 is a first state reference view showing a guide of a shock absorber and a method of assembling an oil seal according to the first embodiment.

Fig. 5 is a view showing a state of a guide and an oil seal assembling method of the shock absorber according to the first embodiment.

Fig. 6 is a state reference diagram three of a guide of a shock absorber and an assembling method of an oil seal in the first embodiment. .

In the figure: 1. the outer cylinder, 2, the director, 3, the oil blanket, 4, metal framework, 5, the rubber body, 6, annular seal, 7, annular boss, 8, supplementary collar, 9, axial clearance, 10, piston rod, 11, first spring of hugging closely, 12, second spring of hugging closely, 13, first seal lip, 14, second seal lip.

Detailed Description

The following examples are further illustrative of the present invention, but the present invention is not limited thereto. Because of the utility model discloses it is more complicated, therefore embodiment is only right the utility model discloses a point part carries out the detail, the utility model discloses the part of not detail all can adopt prior art.

The first embodiment is as follows:

fig. 2-6 show embodiment one of the present invention.

As shown in fig. 2, the guide and oil seal assembling structure of the shock absorber comprises an outer cylinder 1, a guide 2, an oil seal 3, an auxiliary mounting ring 8 and a piston rod 10. The guider 2 and the oil seal 3 are both arranged in the outer cylinder 1. The guider 2 and the oil seal 3 are sleeved outside the piston rod 10.

The oil seal 3 comprises a metal framework 4, a rubber body 5, a first enclasping spring 11 and a second enclasping spring 12. The metal framework 4 and the rubber body 5 are vulcanized into a whole, the lower end of the rubber body 5 is provided with an annular sealing body 6, and the inner side surface of the annular sealing body 6 is in a conical shape with a small top and a big bottom.

The upper end of the guider 2 is provided with an annular boss 7, and the outer side surface of the annular boss 7 is in a conical shape with a small upper part and a large lower part.

The auxiliary mounting ring 8 is made of rubber, the auxiliary mounting ring 8 is sleeved outside the annular boss 7, the annular sealing body 6 is sleeved outside the auxiliary mounting ring 8, and the annular sealing body 6 is in interference fit with the inner wall of the outer barrel 1.

The inner wall of the rubber body 5 is provided with a first sealing lip 13 and a second sealing lip 14, the first sealing lip 13 and the second sealing lip 14 are in interference fit with the piston rod 10, the first tightly holding spring 11 and the second tightly holding spring 12 are embedded on the rubber body 5, the first tightly holding spring 11 is used for keeping the first sealing lip 13 in contact with the piston rod 10, and the second tightly holding spring 12 is used for keeping the second sealing lip 14 in contact with the piston rod 10.

The embodiment also provides an assembly method of the guider and the oil seal of the shock absorber, which comprises the following steps:

A. as shown in fig. 4, the auxiliary mounting ring 8 is sleeved outside the annular boss 7;

B. as shown in fig. 5, the oil seal 3 is pre-positioned with respect to the guide 2, i.e., a part of the annular seal body 6 is fitted over the outside of the auxiliary mounting ring 8, and an axial gap 9 is left between the annular seal body 6 and the guide 2;

C. sleeving the oil seal 3 and the guider 2 outside the piston rod 10; the oil seal 3 and the guider 2 are pressed into the outer cylinder 1 together, and after the guider 2 is positioned, pressure is continuously applied to the oil seal 3 until the axial clearance 9 (see figure 6) is eliminated and the annular sealing body 6 is in interference fit with the inner wall of the outer cylinder 1.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. The utility model provides an assembly structure of director and oil blanket of bumper shock absorber, includes urceolus (1), director (2), oil blanket (3), the inside in urceolus (1) is all installed in director (2) and oil blanket (3), oil blanket (3) are including vulcanizing in metal framework (4) and the rubber body (5) of an organic whole, the lower extreme of the rubber body (5) is equipped with annular seal (6), the upper end of director (2) is equipped with annular boss (7), its characterized in that: still include the supplementary collar (8) of rubber material, the outside at annular boss (7) is established to supplementary collar (8) cover, the outside at supplementary collar (8) is established to annular seal (6) cover, the inner wall interference fit of annular seal (6) and urceolus (1).

2. The structure for assembling a guide and oil seal of a shock absorber according to claim 1, wherein: the outer side surface of the annular boss (7) is in a tapered shape with a small upper part and a large lower part, and the inner side surface of the annular sealing body (6) is in a tapered shape with a small upper part and a large lower part.