Light high-strength damping bush and forming die thereof

Abstract

The utility model relates to a light high-strength damping bushing, which comprises an outer sleeve, the inner sleeve is arranged in the outer sleeve; the connecting sleeve is arranged between the outer sleeve and the inner sleeve; the rubber unit is arranged between the outer sleeve and the connecting sleeve as well as between the connecting sleeve and the inner sleeve, and is used for connecting the outer sleeve, the connecting sleeve and the inner sleeve; the two ends of the connecting sleeve are straight cylinder parts, and the middle of the connecting sleeve is an annular corrugated part. The damping shaft sleeve is sequentially provided with an outer sleeve, a connecting sleeve and an inner sleeve from outside to inside, and the outer sleeve, the connecting sleeve, the connecting sleeve and the inner sleeve are connected through rubber units. The connecting sleeve plays a role of a framework to improve the strength of the rubber unit, so that the strength of the whole damping shaft sleeve can be improved.

Description

Technical Field

[0001] The utility model relates to a damping bushing, in particular to a light and high-strength damping bushing and a forming die thereof. Background Art

[0002] Damping bushings are a common product among automotive parts. When a car is driving, the high-speed rotation of the shaft will cause vibration. In order to improve the stability of the shaft, reduce wear and increase the service life of the shaft, a damping bushing will be fixed on the outside of the shaft to protect the shaft. Bushings are currently commonly used components in the field of industrial equipment to prevent shaft wear and reduce shock.

[0003] The conventional damping sleeve is composed of an outer sleeve, an inner sleeve, and a rubber unit connecting the outer sleeve and the inner sleeve and playing a buffering role;

[0004] However, during use, the rubber unit between the outer sleeve and the inner sleeve is not strong enough, resulting in wear of the rubber unit during vehicle movement, causing hard contact and deformation between the outer sleeve and the inner sleeve.

[0005] In summary, how to improve the strength of the damping sleeve has become an urgent problem that researchers in this field need to solve. Utility Model Content

[0006] The technical problem to be solved by the utility model is: how to improve the strength of the damping sleeve;

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] The utility model is a light-weight and high-strength damping bushing, comprising: an outer sleeve; an inner sleeve, which is arranged inside the outer sleeve; a connecting sleeve, which is arranged between the outer sleeve and the inner sleeve; and a rubber unit, which is arranged between the outer sleeve, the connecting sleeve and the connecting sleeve and the inner sleeve, and connects the outer sleeve, the connecting sleeve and the inner sleeve; the two ends of the connecting sleeve are straight tube parts, and the middle part of the connecting sleeve is an annular corrugated part;

[0009] In this solution, the damping sleeve is provided with an outer sleeve, a connecting sleeve, and an inner sleeve in sequence from the outside to the inside, and the outer sleeve, the connecting sleeve, and the connecting sleeve and the inner sleeve are connected by a rubber unit; the connecting sleeve acts as a skeleton to improve the strength of the rubber unit, thereby improving the strength of the entire damping sleeve;

[0010] The connecting sleeve has straight tube parts at both ends and a corrugated part in the middle. The straight tube part is provided to facilitate fixed connection with the cavity of the mold, and the corrugated part can increase the contact area with the rubber unit to prevent the rubber unit from separating from the corrugated part.

[0011] In order to further improve the bonding strength of the connecting sleeve in the rubber unit, the utility model adopts a method of providing a plurality of through holes on the annular corrugated portion; the rubber unit is injected into the through holes;

[0012] During the injection molding process, the rubber unit will pass through the through hole to be connected with the rubber unit of the outer sleeve and the connecting sleeve and the rubber unit of the inner sleeve and the connecting sleeve, thereby improving the bonding strength of the connecting sleeve in the rubber unit.

[0013] In order to improve the shock absorption performance of the damping bushing, the utility model adopts the rubber unit having a first annular groove and a second annular groove; wherein the first annular groove is arranged at the top and bottom between the outer sleeve and the connecting sleeve; the second annular groove is arranged at the top and bottom between the inner sleeve and the connecting sleeve; the groove depth of the first annular groove is greater than the groove depth of the second annular groove;

[0014] Due to the existence of the first annular groove and the second annular groove, the force generated at the inner sleeve will squeeze the first annular groove and the second annular groove, thereby reducing the squeezing with the rubber unit and extending the service life of the rubber unit.

[0015] The present invention also discloses a molding die for a damping bushing, comprising a mold cavity formed by combining an upper mold, a middle mold, and a lower mold; a first annular protrusion for molding the first annular groove and a second annular protrusion for molding the second annular groove are arranged at the top and bottom of the mold cavity; an insertion groove matching the straight cylinder portion is arranged between the second annular protrusion and the first annular protrusion;

[0016] The second annular protrusion is used to form the second annular groove, and the first annular protrusion is used to form the first annular groove; the insertion groove is matched with the straight cylinder part, and when the mold is closed, the connecting sleeve can be fixed in the cavity.

[0017] The beneficial effects of the utility model are as follows: the utility model is a lightweight and high-strength damping bushing, wherein the damping sleeve is provided with an outer sleeve, a connecting sleeve and an inner sleeve in sequence from the outside to the inside, and the outer sleeve, the connecting sleeve and the connecting sleeve and the inner sleeve are connected by a rubber unit; the connecting sleeve acts as a skeleton to improve the strength of the rubber unit, thereby improving the strength of the entire damping sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a cross-sectional view of the utility model;

[0020] Figure 2 It is a cross-sectional view of the connecting sleeve of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the forming die;

[0022] In the figure: 1-outer sleeve, 2-inner sleeve, 3-connecting sleeve, 31-straight cylinder, 32-annular corrugated portion, 33-through hole, 4-rubber unit, 41-first annular groove, 42-second annular groove, 5-upper mold, 6-lower mold, 7-cavity, 71-first annular protrusion, 72-second annular protrusion, 73-insertion groove, 8-middle mold. DETAILED DESCRIPTION

[0023] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0024] like Figure 1-2 As shown, the utility model is a lightweight and high-strength damping bushing, comprising: an outer sleeve 1; an inner sleeve 2, which is arranged in the outer sleeve 1; a connecting sleeve 3, which is arranged between the outer sleeve 1 and the inner sleeve 2; and a rubber unit 4, which is arranged between the outer sleeve 1 and the connecting sleeve 3 and between the connecting sleeve 3 and the inner sleeve 2, and connects the outer sleeve 1, the connecting sleeve 3, and the inner sleeve 2; the two ends of the connecting sleeve 3 are straight tube parts 31, and the middle part of the connecting sleeve 3 is an annular corrugated part 32;

[0025] In this solution, the damping sleeve is provided with an outer sleeve, a connecting sleeve, and an inner sleeve in sequence from the outside to the inside, and the outer sleeve, the connecting sleeve, and the connecting sleeve and the inner sleeve are connected by a rubber unit; the connecting sleeve acts as a skeleton to improve the strength of the rubber unit, thereby improving the strength of the entire damping sleeve;

[0026] The connecting sleeve has straight tube parts at both ends and a corrugated part in the middle. The straight tube part is provided to facilitate fixed connection with the cavity of the mold, and the corrugated part can increase the contact area with the rubber unit to prevent the rubber unit from separating from the corrugated part.

[0027] like Figure 2 As shown, in order to further improve the bonding strength of the connecting sleeve in the rubber unit, the utility model adopts a plurality of through holes 33 on the annular corrugated portion 32; the rubber unit 4 is injected into the through holes 33, and the through holes 33 are conducive to bonding;

[0028] During the injection molding process, the rubber unit will pass through the through hole to be connected with the rubber unit of the outer sleeve and the connecting sleeve and the rubber unit of the inner sleeve and the connecting sleeve, thereby improving the bonding strength of the connecting sleeve in the rubber unit.

[0029] like Figure 1As shown, in order to improve the shock absorption performance of the damping bushing, the utility model adopts the rubber unit with a first annular groove 41 and a second annular groove 42; wherein the first annular groove 41 is arranged at the top and bottom between the outer sleeve 1 and the connecting sleeve 3; the second annular groove 42 is arranged at the top and bottom between the inner sleeve 2 and the connecting sleeve 3; the groove depth of the first annular groove 41 is greater than the groove depth of the second annular groove 42;

[0030] Due to the existence of the first annular groove and the second annular groove, the force generated at the inner sleeve will squeeze the first annular groove and the second annular groove, thereby reducing the squeezing with the rubber unit and extending the service life of the rubber unit.

[0031] like Figure 3 As shown, the present solution also discloses a molding die for a damping bushing, comprising a mold cavity 7 formed by an upper mold 5, a middle mold 8, and a lower mold 6; a first annular protrusion 71 for molding the first annular groove 41 and a second annular protrusion 72 for molding the second annular groove 42 are arranged at the top and bottom of the mold cavity 7; an insertion groove 73 matching the straight tube portion 31 is arranged between the second annular protrusion 72 and the first annular protrusion 71;

[0032] The second annular protrusion is used to form the second annular groove, and the first annular protrusion is used to form the first annular groove; the insertion groove is matched with the straight cylinder part, and when the mold is closed, the connecting sleeve can be fixed in the cavity.

[0033] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A lightweight and high-strength damping bushing, characterized in that: include: Outer sleeve; An inner sleeve, which is disposed inside the outer sleeve; A connecting sleeve, which is arranged between the outer sleeve and the inner sleeve; and a rubber unit, which is arranged between the outer sleeve, the connecting sleeve, and the connecting sleeve and the inner sleeve, and connects the outer sleeve, the connecting sleeve, and the inner sleeve; The two ends of the connecting sleeve are straight tube parts, and the middle part of the connecting sleeve is an annular corrugated part.

2. A lightweight and high-strength damping bushing according to claim 1, characterized in that: The annular corrugated portion is provided with a plurality of through holes; The rubber unit is injected into the through hole.

3. A lightweight and high-strength damping bushing according to claim 2, characterized in that: The rubber unit has a first annular groove and a second annular groove; Wherein, the first annular groove is arranged at the top and bottom between the outer sleeve and the connecting sleeve; The second annular groove is arranged at the top and bottom between the inner sleeve and the connecting sleeve; The groove depth of the first annular groove is greater than the groove depth of the second annular groove.

4. A lightweight and high-strength damping bushing forming die according to any one of claims 1 to 3, characterized in that: It includes a cavity formed by combining an upper die, a middle die and a lower die; A first annular protrusion for forming the first annular groove and a second annular protrusion for forming the second annular groove are arranged at the top and the bottom of the cavity; An insertion groove matching the straight tube portion is provided between the second annular protrusion and the first annular protrusion.

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