CN217481848U - Sealing structure of hydraulic bushing - Google Patents

Abstract

The utility model provides a seal structure of hydraulic bushing, hydraulic bushing includes outer tube and pressure equipment rubber main spring in the outer tube, surrounds runner body and rubber backstop between outer tube and rubber main spring, and the both sides department of rubber main spring is equipped with the window as the liquid cavity, is equipped with the runner on the runner body, and the lateral wall department of rubber main spring is equipped with the bypass, and liquid cavity and runner intussuseption are filled with viscous liquid, seal structure of hydraulic bushing is including setting up at rubber main spring both ends department and its rubber body sealing ring as an organic whole structure and the turn-ups of overcoat tip department turn over inwards with the laminating of rubber body, and be interference fit between sealing ring and the overcoat inner wall. The utility model discloses an in the periphery side setting of rubber body both ends department with the sealing ring of rubber body integrated into one piece and the inside flanging cooperation of outer tube, avoid hydraulic pressure bush weeping, this kind of sealing ring can guarantee with rubber body integrated into one piece's mode moreover that the sealing ring can not shift in hydraulic pressure bush's equipment in-process, guarantees wholeness ability.

Description

Sealing structure of hydraulic bushing

Technical Field

The utility model relates to a seal structure, concretely relates to seal structure of hydraulic bushing belongs to the damping and falls the technical field of making an uproar.

Background

The hydraulic bushing is a vibration reduction part widely applied to automobiles, and compared with the traditional rubber bushing, the hydraulic bushing can provide larger viscous damping characteristic in a specific frequency range, and improves the driving stability and safety of the automobiles. The rubber main spring structure in the hydraulic bushing mainly meets the requirement of static rigidity of the hydraulic bushing in all directions, and the structure of the liquid cavity in the rubber main spring provides equivalent piston area and volume flexibility. In the use process of the hydraulic bushing, in order to ensure the stability of the performance of the hydraulic bushing, the contact surface between the flow channel and the outer pipe cannot have liquid flow, and the whole hydraulic bushing does not leak liquid outwards. If liquid flows on the contact surface between the flow channel and the outer pipe, the performance of the hydraulic bushing is uncontrollable; if the hydraulic bushing leaks outwards, the product can be failed. When the center deviation of the inner pipe and the outer pipe is realized, the volumes of two liquid chambers of the rubber main spring are changed, liquid flows from one chamber to the other chamber through the flow channel, energy generated by vibration is attenuated through inertia loss, friction and the like of liquid flowing, the attenuated energy generates heat, the generated heat and impact load borne by the liquid increase the sealing difficulty of the liquid, and the single sealing structure is difficult to realize the sealing of the liquid.

Like application number CN201921886875.0, the utility model patent of name "hydraulic pressure bush, swing arm assembly and car" sets up sealing rubber through the inboard at the hydraulic pressure bush outer tube, makes rubber main spring and sealing rubber laminating avoid hydraulic pressure bush weeping. However, how to arrange the sealing rubber at the inner side of the outer pipe is not mentioned in the method, the sealing performance between the sealing rubber and the outer pipe is doubtful, and the sealing method is inconvenient to install, because the internal structure of the hydraulic bushing is pressed in the outer pipe, the stability of the sealing rubber is difficult to ensure in the pressing process, the attaching degree between the sealing rubber and the main rubber spring is difficult to ensure, and the sealing effect is limited.

For another example, the application number CN201910815521.5 is entitled "a method and a structure for sealing a liquid cavity in a liquid rubber composite node" in which an annular groove is formed in the periphery of a cover plate through hole and outside an arc-shaped plate, and a cover plate sealing ring is placed in the groove. The inner side of the outer runner pipe is in interference fit with the outer side of the cover plate, so that the inner side of the outer runner pipe is tightly pressed on the sealing ring of the cover plate, a liquid channel sealing structure is formed, and liquid in the liquid cavity is prevented from flowing out from a gap between the outer side of the cover plate and the inner side of the outer runner pipe. The two ends of the whole outer pipe extend out of the top end of the runner outer pipe, the extending part of the whole outer pipe 1 is bent towards the top end of the middle spacer sleeve to form an outer pipe elbow, a folding cavity is formed among the whole outer pipe, the runner outer pipe and the middle spacer sleeve, and an end sealing ring is arranged in the folding cavity. This scheme also sets up solitary sealing washer in compound node, needs to set up extra structure and places this solitary sealing washer, also need additionally pay attention to not destroying the sealing washer in the installation moreover.

SUMMERY OF THE UTILITY MODEL

The utility model discloses sealed effect to current hydraulic pressure bush is difficult to the problem of guaranteeing, has provided a hydraulic pressure bush's seal structure, guarantees that liquid only flows in the flow space of design regulation in the hydraulic pressure bush, and the phenomenon of outside seepage can not appear.

The utility model discloses a solve the technical means that above-mentioned problem adopted and do: the utility model provides a seal structure of hydraulic bushing, hydraulic bushing includes outer tube and pressure equipment at outer tube rubber main spring, surrounds runner body and the rubber backstop between outer tube and rubber main spring, and the both sides department of rubber main spring is equipped with the window and regards as the liquid cavity, is equipped with the runner on the runner body, and the lateral wall department of rubber main spring is equipped with the bypass, and liquid cavity and runner intussuseption are filled with viscous liquid, seal structure of hydraulic bushing is including setting up at rubber main spring both ends department rather than the sealing ring of rubber body structure as an organic whole and the turn-ups of overcoat tip department enstrophe and rubber body laminating, and be interference fit between sealing ring and the overcoat inner wall.

Furthermore, the interference magnitude between the sealing ring and the inner wall of the outer pipe is 0.5-1.0 mm.

Further, the width of the seal ring is set to 2-5 mm.

Further, more than two sealing rings are respectively arranged on the periphery of the two ends of the rubber body.

Further, the distance between two adjacent sealing rings is 5-10 mm.

Furthermore, a sealing column is arranged between two adjacent sealing rings to connect the two sealing rings.

Further, the width of the sealing column is 2-5 mm.

Further, the number of the sealing columns between two adjacent sealing rings is 4-8.

Furthermore, the sealing ring exceeds the rubber body by 0.5-1.0 mm.

Furthermore, the sealing column exceeds the rubber body by 0.5-1.0 mm.

Further, the two ends of the outer tube are turned inwards by 20-40 ^o 。

The beneficial effects of the utility model are that:

1. the utility model discloses an in the periphery side setting of rubber body both ends department with the sealing ring of rubber body integrated into one piece and the inside flanging cooperation of outer tube, avoid hydraulic pressure bush weeping, this kind of sealing ring can guarantee with rubber body integrated into one piece's mode moreover that the sealing ring can not shift in hydraulic pressure bush's equipment in-process, guarantees wholeness ability.

2. The utility model further ensures the sealing effect by arranging more than two sealing rings at each end of the rubber body; and meanwhile, the sealing columns are adopted to connect adjacent sealing rings, so that the strength of the sealing rings is improved, and the sealing rings are prevented from being damaged in the press fitting process of the hydraulic bushing.

Drawings

FIG. 1 is a schematic view of the overall structure of a hydraulic bushing according to an embodiment;

FIG. 2 is a schematic radial cross-sectional view of FIG. 1;

FIG. 3 is a schematic axial cross-sectional view of the hydraulic bushing of FIG. 2, shown in an upward direction;

FIG. 4 is a schematic view of the structure of FIG. 1 with the outer tube removed;

FIG. 5 is a schematic view of a rubber main spring according to an embodiment;

FIG. 6 is an enlarged view of a portion of FIG. 5;

in the figure: 1. the rubber sealing device comprises an outer pipe, 100 rubber main springs, 2 inner pipes, 3 inner cages, 4 rubber bodies, 41 windows, 42 sealing rings, 43 sealing columns, 5 runner bodies, 51 runners, 52 notches, 6 rubber stoppers, 7 viscous liquid, 8 bypasses and 9 liquid cavities.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example one

A sealing structure of a hydraulic bushing is disclosed, as shown in fig. 1-3, the hydraulic bushing comprises an outer tube 1 and a rubber main spring 100 which is pressed in the outer tube 1, wherein the rubber main spring 100 is a structure which is formed by vulcanizing an inner tube 2 and an inner cage 3 into a whole by using a rubber body 4, windows 41 are arranged at two sides of the rubber main spring 100, after the outer tube 1 is pressed in, the direction of the window 41 forms the air direction of the hydraulic bushing, and the direction vertical to the air direction is the real direction of the hydraulic bushing. A runner body 5 and two rubber stoppers 6 are arranged between the outer pipe 1 and the rubber main spring 100, the runner body 5 is in a ring shape with a notch 52, after the runner body 5 is assembled into a whole, the notch 52 of the runner body 5 is positioned at the real position of the hydraulic bushing, and the rubber stoppers 6 are symmetrically arranged at the hollow position. As shown in fig. 4, a flow passage 51 is provided on the outer side wall of the flow passage body 5, and a bypass 8 is provided on the outer side wall of the rubber body 4 at a notch 52 of the flow passage body 5.

As shown in fig. 5, the outer circumference of the rubber body 4 at both ends of the rubber main spring 100 is provided with a sealing ring 42, the sealing ring 42 protrudes 0.5-1.0mm from the surface of the rubber body, so that an interference fit with an interference of 0.5-1.0mm is formed between the sealing ring 42 and the outer tube 1, and the viscous liquid 7 in the flow space is blocked to prevent the viscous liquid from leaking out of the hydraulic bushing. The width of the sealing ring 42 is 2-5mm, which not only ensures the strength of the sealing ring 42, but also facilitates the press-fitting, because if the width of the sealing ring 42 is too small, the sealing ring 42 is easily damaged in the process of demolding the rubber main spring 100 from a vulcanization mold and in the process of assembling the rubber main spring 100 with the outer tube 1; if the width of the seal ring 42 is too large, it will cause difficulty in assembling the rubber main spring 100 with the outer tube 1. Wherein preferably more than two sealing rings 42 are provided at each end to provide a multiple barrier, further sealing against the viscous liquid 7. Two at each end in this embodiment, although the number may be selected as appropriate based on the size of the hydraulic bushings and performance requirements. As shown in fig. 6, a sealing post 43 is further provided between adjacent sealing rings 42 to connect the two, so as to enhance the strength of the sealing ring 42, and the sealing ring 42 is not easily damaged during the demolding and press-fitting processes. The number of the sealing columns 43 between two adjacent sealing rings 42 is set to be 4-8, and when the number of the sealing columns 43 is too small, the reinforcing effect on the sealing rings 42 is limited, and the use requirement cannot be met; when the number is too large, the assembling process between the rubber main spring 100 and the outer tube 1 becomes difficult, and the design of the lateral demolding of the vulcanization mold is limited. Similarly, the width of the sealing post 43 is also selected to be 2 to 5mm to secure strength and mounting, and the thickness H of the sealing post 43 beyond the rubber body 4 is also set to be 0.5 to 1.0 mm.

In addition, after the rubber main spring 100 is pressed on the outer pipe 1, the two ends of the outer pipe 1 are turned inwards, the turning angle is 20-40 degrees, the matching of the rubber body 4 and the outer pipe 1 is further enhanced, the leakage of the hydraulic bushing is thoroughly avoided, meanwhile, the upper end part and the lower end part of the outer pipe 1 are turned inwards, the axial pressing-out force of the outer pipe 1 and the rubber main spring 100 is increased, and the stability of the hydraulic bushing in the actual use process is ensured.

The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, so all equivalent technical solutions should also belong to the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims (10)

1. The utility model provides a seal structure of hydraulic bushing, hydraulic bushing includes outer tube and pressure equipment rubber main spring in the outer tube, surrounds runner body and rubber backstop between outer tube and rubber main spring, and the both sides department of rubber main spring is equipped with the window as liquid cavity, is equipped with the runner on the runner body, and the lateral wall department of rubber main spring is equipped with the bypass, and liquid cavity and runner intussuseption are filled with viscous liquid, its characterized in that: the sealing structure of the hydraulic bushing comprises sealing rings which are arranged at two ends of the rubber main spring and are integrated with the rubber body, and turnups which are arranged at the end parts of the outer sleeve and are inwards turned over to be attached to the rubber body, and the sealing rings are in interference fit with the inner wall of the outer sleeve.

2. A seal structure of a hydraulic bushing according to claim 1, wherein: the interference magnitude between the sealing ring and the inner wall of the outer pipe is 0.5-1.0 mm.

3. A seal structure of a hydraulic bushing according to claim 1, wherein: the width of the sealing ring is set to be 2-5 mm.

4. A seal structure of a hydraulic bushing according to claim 1, wherein: more than two sealing rings are respectively arranged on the periphery of two ends of the rubber body.

5. A seal structure of a hydraulic bushing according to claim 4, wherein: the distance between two adjacent sealing rings is 5-10 mm.

6. A seal structure of a hydraulic bushing according to claim 4, wherein: and a sealing column is arranged between two adjacent sealing rings to connect the two sealing rings.

7. A seal structure of a hydraulic bushing according to claim 6, wherein: the width of the sealing column is 2-5 mm.

8. A seal structure of a hydraulic bushing according to claim 6, wherein: the number of the sealing columns between two adjacent sealing rings is 4-8.

9. A seal structure of a hydraulic bushing according to claim 1, wherein: the thickness of the sealing ring exceeding the rubber body is 0.5-1.0 mm.

10. A seal structure of a hydraulic bushing according to claim 6, wherein: the thickness of the sealing column exceeding the rubber body is 0.5-1.0 mm.

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