CN110789327A - An engine front mount rubber cushion - Google Patents

Abstract

The invention discloses a rubber cushion for front suspension of an engine, which comprises two split-type upper and lower rubber cushions with the same structure and symmetrically arranged up and down in a mirror, both of which include an upper frame and a lower The skeleton and the rubber body set in the middle, the rubber body is in the structure of an outer cylinder and an inner cone, and the outer cylinder and the inner cone have the same central axis, wherein: the diameter of the upper port of the inner cone is larger than the diameter of the lower port; the lower frame is embedded in the rubber The bottom surface of the body is integrally formed by vulcanization, and the center of the lower skeleton is provided with a central sleeve installation part for installing the central sleeve; the upper skeleton is arranged inside the upper end of the rubber body and is integrally formed by vulcanization, and the upper skeleton extends upward along the central hole with a protruding part. The protruding part on the surface of the rubber body is used to be inserted into the mounting hole of the frame side bracket to prevent radial displacement; the outer peripheral surface of the rubber body is wrapped with a band and upper and lower flanges. The present invention has good noise reduction and vibration reduction effects while ensuring the rigidity performance of the mount.

Description

An engine front mount rubber cushion

technical field

The invention relates to the technical field of engine installation, in particular to a rubber cushion mounted on the front of the engine, which is used for connecting the engine and the vehicle frame, and has the functions of noise reduction and vibration reduction.

Background technique

In order to reduce the vibration and noise generated during the whole driving process of the vehicle, the automobile engine adopts the vibration damping mount installed with elastic support. Among them, the rubber mount is still widely used in the field of commercial vehicles.

In the process of realizing the present invention, the inventor found that:

In order to improve the ride comfort and comfort of the vehicle as much as possible, the stiffness performance index of the suspension is often set to a very low level, but this design will inevitably reduce the fatigue performance of the product and affect the quality of the vehicle to a certain extent.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention proposes a rubber pad for the front mount of the engine, which can achieve the effects of noise reduction and vibration reduction while ensuring the rigidity performance index of the front mount.

To this end, the technical solution of the present invention is as follows: an engine front suspension rubber cushion, comprising two separate structures of an upper rubber cushion and a lower rubber cushion, the upper and lower rubber cushions have the same structure and are mirror-shaped. Symmetrically arranged up and down, all include an upper skeleton, a lower skeleton arranged coaxially, and a rubber body arranged between the upper skeleton and the lower skeleton, and are characterized in that:

The rubber body is in the structure of an outer cylinder and an inner cone, and the outer cylinder and the inner cone have the same central axis, wherein: the diameter of the upper port of the inner cone is larger than the diameter of the lower port;

The lower skeleton is a circular plate structure with a through-hole mounting hole in the center, which is embedded in the bottom surface of the rubber body and integrally formed by vulcanization. The relative annular protrusions of the pads cooperate with each other to form the installation part of the central sleeve;

The upper frame includes a horizontal section extending radially from the outside to the center, a transition connecting section arched downward, and a vertical section extending upward. A raised portion extending upward is formed on the surface of the rubber body. The outer diameter of the raised portion is adapted to the mounting hole provided on the frame side bracket, and is used to be inserted into the mounting hole of the frame side bracket to prevent radial displacement. ;

The outer peripheral surface of the rubber body is wrapped with a cuff, and the cuff is provided with flanging on the upper and lower sides. There is an overlap between them;

During installation, the upper rubber pad and the lower rubber pad are inserted into the upper and lower end surfaces of the mounting holes on the side brackets of the frame respectively, and the central sleeve passes through the mounting holes on the side brackets of the frame and is located on the lower rubber pad and the upper rubber pad. The upper end surface of the upper rubber cushion is also connected with the bottom surface of the engine side bracket between the installation parts of the center sleeve, and a bolt connects the lower rubber cushion, the center sleeve, the frame side bracket, the upper rubber cushion, the engine side The mounting hole of the bracket passes through and is fixed by a locking nut. After fixing, the two ends of the center sleeve are respectively supported on the center sleeve installation parts of the lower rubber cushion and the upper rubber cushion.

Preferably, in the installed state, a clearance gap is reserved between the protruding parts of the upper frame of the upper rubber cushion and the lower rubber cushion.

Preferably, the cuff is a nylon cuff.

Preferably, the upper frame and the lower frame are metal frames, wherein the material of the upper frame is cold-rolled low carbon steel plate, and the material of the lower frame is medium carbon steel plate.

Beneficial effects: Compared with the existing structure, the present invention has a more optimized and reasonable structure, the fatigue performance of the suspension cushion is obviously improved, the bearing capacity is improved, the vibration reduction effect is obvious, and in the area with poor road shape, the suspension fatigue life is prolonged by about above 50.

The center of the rubber body is set as an inner cone surface structure, there is a movable gap between the rubber body and the central sleeve under the installation state, and there is a space for avoidance during extrusion;

The upper rubber cushion and the lower rubber cushion are installed by setting the center sleeve installation part to install the center sleeve. Stable stiffness value of the pad and the lower rubber pad; the second is to connect the upper rubber pad and the lower rubber pad as a whole to support the upper rubber pad and the lower rubber pad and prevent deformation;

A transition connecting section that is arched downward is arranged between the horizontal section and the vertical section of the upper frame to increase the connection strength between the horizontal section and the vertical section of the upper frame; the upper frame is arranged inside the upper end of the rubber body and is integrally formed by vulcanization. Avoid direct contact between the upper frame and the end surface of the frame side bracket during installation, which can reduce noise; the upper frame is provided with a raised part, which is inserted into the mounting hole on the frame side bracket for positioning to prevent radial displacement and bulge The inner part is the skeleton and the outer part is the rubber body, which can also reduce the noise; at the same time, in the installation and tightening state, there is a clearance gap between the upper rubber cushion and the upper skeleton of the lower rubber cushion to avoid deformation. When the contact occurs, the upper rubber pad or the lower rubber pad is deformed and cannot fit with the upper and lower end surfaces of the frame side bracket, which affects the use effect and service life;

The outer peripheral surface of the rubber body is wrapped with a cuff, and the upper and lower parts of the cuff are provided with flanging, which can reduce and limit the deformation of the rubber body, reduce the local stress, and improve the fatigue performance; at the same time, the cuff is made of nylon. Nylon material bears large tensile force, has excellent toughness and tensile force, impact resistance, acid and alkali resistance, fire resistance, cold resistance and heat resistance, which can prolong the service life;

The upper frame is made of cold-rolled low carbon steel sheet, which has good stamping process and is convenient for stamping and forming of the upper frame structure; the lower frame is made of medium carbon steel sheet, and its strength and toughness can meet the quality requirements.

Description of drawings

FIG. 1 is a schematic diagram of the present invention in an installed state.

FIG. 2 is a structural diagram of an upper rubber pad and a lower rubber pad of the present invention.

As shown in the picture: 1. Upper rubber pad; 2. Lower rubber pad; 3. Upper frame; 3-1. Horizontal section; 3-2. Transition connection section; 3-3, Vertical section; 4. Lower skeleton; 5. Rubber body; 5-1. Cylindrical protrusion; 6. Annular protrusion; 7. Avoidance gap; 8. Nylon band; 8-1. Flanging; 9. Center sleeve; 10. Bolts; 11. Lock nuts; 12. Metal washers;

A. Frame side bracket; B. Engine side bracket.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, but the embodiments should not be construed as limiting the present invention.

The present invention is shown in Figure 1 and Figure 2:

A rubber pad for front suspension of an engine, comprising an upper rubber pad 1 and a lower rubber pad 2 of two separate structures, the upper rubber pad and the lower rubber pad have the same structure and are symmetrically arranged in the mirror up and down, and both include Coaxially arranged upper frame 3, lower frame 4 and rubber body 5 arranged between the upper frame and the lower frame, wherein:

The rubber body 5 is in the structure of an outer cylinder and an inner cone, and the outer cylinder and the inner cone have the same central axis, wherein: the diameter of the upper port of the inner cone is larger than the diameter of the lower port;

The lower frame 4 is a circular plate structure with a through-hole mounting hole in the center, which is embedded in the bottom surface of the rubber body and integrally formed by vulcanization. The relative annular protrusions 6 of the lower rubber cushion 2 cooperate with each other to form a central sleeve mounting portion;

The cross-section of the upper frame 3 includes a horizontal section 3-1 that is connected in turn by extending outward to the center, a transition connecting section 3-2 that arches downward, and a vertical section 3-3 that extends upward. The upper frame is arranged inside the upper end of the rubber body. And it is integrally formed by vulcanization. This arrangement makes the rubber body contact the end face of the frame side bracket, which can reduce noise. The vertical section protrudes from the surface of the rubber body to form an upwardly extending cylindrical protrusion 5-1. The outer diameter of the convex part is adapted to the mounting hole provided on the frame side bracket, and is used to be inserted into the mounting hole of the frame side bracket A to prevent radial displacement; at the same time, in the fastened state, the upper rubber is soft A clearance gap 7 is reserved between the cushion and the cylindrical protrusion 5-1 on the upper frame of the lower rubber cushion to prevent interference when deformed under pressure;

The outer peripheral surface of the rubber body 5 is wrapped with a nylon band 8. The upper and lower parts of the nylon band are provided with flanges 8-1. There are overlapping parts between the edge and the upper frame and the lower frame;

The upper frame 3 is made of cold-rolled low carbon steel sheet, which has good stamping process and is convenient for stamping; the lower frame 4 is made of medium carbon steel sheet, and its strength and toughness can meet the quality requirements.

The installation method of the present invention:

When installing, first insert the lower rubber cushion bulge into the mounting hole of the frame side bracket, so that the upper end face of the lower rubber cushion pad is in contact with the lower end face of the frame side bracket; there will be a metal gasket 12 The bolt 10 passes upward from the bottom of the lower rubber cushion, sets the center sleeve 9 on the bolt, and then inserts the upper rubber cushion with the raised end facing down (that is, turning 180 degrees) on the frame. In the installation hole of the side bracket, make the lower end surface of the upper rubber cushion fit with the upper end surface of the frame side bracket; then pass the bolt through the installation hole at the bottom of the engine side bracket B, and fix it with the locking nut 11.

The working principle of the present invention:

When the car passes through bad road sections such as potholes, it will bump up and down and swing left and right. The frame side bracket, the frame side bracket and the upper rubber pad, and the upper rubber pad and the engine side bracket are all attached to each other, which restricts the rubber body of the lower rubber pad and the rubber body of the upper rubber pad from standing vertically. Displacement in the straight direction, at the same time, the shock absorption effect is achieved under the elastic use of the rubber body; when swinging left and right, the outer side of the rubber body is surrounded by nylon straps and flanging, which reduces and limits the deformation of the rubber body and controls the deformation within a certain range. In order to reduce the local stress, the inner side of the rubber body is provided with a convex part inserted into the mounting hole of the frame side bracket to limit the rubber body radially, so that the rubber body of the lower rubber cushion and the upper rubber cushion can be separated. The lateral displacement of the rubber body is limited, and the inner cone surface structure of the rubber body provides a reasonable deformation avoidance space, which avoids friction and collision inside the rubber body and improves the fatigue performance; The fitting parts of the frame side brackets are connected by the rubber body, and the internal structure is adopted to reduce interference as much as possible, which effectively reduces the generation of noise.

What is not described in detail in this specification is a well-known technology in the art.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (4)

1. A front-mounted rubber cushion for an engine, comprising an upper rubber cushion and a lower rubber cushion of two separate structures, the upper rubber cushion and the lower rubber cushion have the same structure and are symmetrically arranged in the mirror up and down, and both include The coaxially arranged upper skeleton and lower skeleton and the rubber body arranged between the upper skeleton and the lower skeleton are characterized in that: The rubber body is in the structure of an outer cylinder and an inner cone, and the outer cylinder and the inner cone have the same central axis, wherein: the diameter of the upper port of the inner cone is larger than the diameter of the lower port; The lower skeleton is a circular plate structure with a through-hole mounting hole in the center, which is embedded in the bottom surface of the rubber body and integrally formed by vulcanization. The relative annular protrusions of the pads cooperate with each other to form the installation part of the central sleeve; The upper frame includes a horizontal section extending radially from the outside to the center, a transition connecting section arched downward, and a vertical section extending upward. A raised portion extending upward is formed on the surface of the rubber body. The outer diameter of the raised portion is adapted to the mounting hole provided on the frame side bracket, and is used to be inserted into the mounting hole of the frame side bracket to prevent radial displacement. ; The outer peripheral surface of the rubber body is wrapped with a cuff, and the cuff is provided with flanging on the upper and lower sides. There is an overlap between them; During installation, the upper rubber pad and the lower rubber pad are inserted into the upper and lower end surfaces of the mounting holes on the side brackets of the frame respectively, and the central sleeve passes through the mounting holes on the side brackets of the frame and is located on the lower rubber pad and the upper rubber pad. The upper end surface of the upper rubber cushion is also connected with the bottom surface of the engine side bracket between the installation parts of the center sleeve, and a bolt connects the lower rubber cushion, the center sleeve, the frame side bracket, the upper rubber cushion, the engine side The mounting hole of the bracket passes through and is fixed by a locking nut. After fixing, the two ends of the center sleeve are respectively supported on the center sleeve installation parts of the lower rubber cushion and the upper rubber cushion. 2 . The front-mounted rubber cushion of claim 1 , wherein in the installed state, there is reserved space between the upper and lower rubber cushions and the raised portions of the upper frame. 3 . Avoid gaps. 3 . The front-mounted rubber cushion of claim 1 or 2 , wherein the strap is a nylon strap. 4 . 4. A kind of rubber pad for engine front mount according to claim 3, characterized in that: the upper frame and the lower frame are metal frames, wherein: the material of the upper frame is a cold-rolled low carbon steel plate, and the material of the lower frame is a metal frame. It is a medium carbon steel plate.

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