CN217553676U - Rear suspension bush assembly, rear suspension system and automobile - Google Patents

Abstract

The utility model provides a back suspension bush assembly, back suspension system and car, back suspension bush assembly includes: the outer framework and the first inner core are fixed through rubber vulcanization, and rubber is vulcanized at a plurality of positions surrounding the first inner core; the middle connecting rod partially penetrates through a round hole formed in the outer framework and then extends into the outer framework; the connection of the intermediate connecting rod and the inner core is realized by screwing a first bolt passing through the intermediate connecting rod into the first inner core.

Description

Rear suspension bush assembly, rear suspension system and automobile

Technical Field

The utility model belongs to car parts, concretely relates to back suspension bush assembly, back suspension system and car.

Background

At present, a horizontal power assembly system of a conventional fuel vehicle is mostly arranged by adopting a pendulum type three-point suspension, the left suspension and the right suspension support the weight of an engine, the rear suspension mainly plays a role in vibration reduction and torsion resistance, and the rear suspension is mainly provided with a pull rod.

In the scheme of patent No. CN214928936U, a rear suspension bracket is provided, in which a large end of a rear suspension rod assembly is connected and fastened with a front subframe from bottom to top by a bolt; because the big end of the rear suspension pull rod assembly is generally large and can move, a large opening needs to be formed in the front auxiliary frame in order to install the big end of the rear suspension pull rod assembly in the front auxiliary frame. This structure easily causes the following problems:

1) The overall volume of an external framework where the big head of the rear suspension pull rod assembly is located is very large, so that the rigid body mode of the rear suspension pull rod assembly is not high, and the pitch rigid body mode of the rear suspension pull rod assembly is easily coupled with the first-order mode of a front auxiliary frame or the 2-order excitation of a power assembly to cause resonance, thereby causing accelerated rolling;

2) The outer framework where the big head of the rear suspension pull rod assembly is located is large in size, and the outer framework of the big head of the rear suspension pull rod assembly needs to be inserted into the front auxiliary frame for installation, so that a large opening needs to be formed in the front auxiliary frame, the bending rigidity of the front auxiliary frame is weakened, and the bending modal frequency of the front auxiliary frame is reduced;

3) The rear suspension pull rod assembly is fastened to the front auxiliary frame through 1 bolt, the dynamic stiffness of the mounting point is not high, and NVH problems such as accelerated rumbling and accelerated roughness are easily caused;

4) The bolt is beaten from up down to the assembly of back suspension pull rod assembly and preceding sub vehicle frame, can lead to whole car ground clearance to reduce, influences the trafficability characteristic.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a rear suspension bush assembly, rear suspension system and car have been designed.

The technical scheme of the utility model is that:

the utility model provides a back suspension bush assembly, include:

the outer framework and the first inner core are fixed through rubber vulcanization, and rubber is vulcanized at a plurality of positions surrounding the first inner core;

the middle connecting rod partially penetrates through a round hole formed in the outer framework and then extends into the outer framework;

the connection of the intermediate connecting rod and the inner core is realized by screwing a first bolt passing through the intermediate connecting rod into the first inner core.

Preferably, mounting holes for fixing with the front sub-frame are provided at both sides of the outer frame.

Preferably, reverse gear limiting rubber arranged in an arc shape is vulcanized in a first cavity between the outer framework and the first inner core, forward gear limiting rubber is vulcanized in a second cavity between the outer framework and the first inner core, and main spring rubber is vulcanized in a third cavity between the outer framework and the first inner core;

the first cavity is close to the front auxiliary frame, the second cavity is opposite to the first cavity, and the third cavity is connected with the first cavity and the second cavity.

Preferably, the intermediate connecting rod is Y-shaped, and a connecting hole is formed in one end, far away from the outer framework, of the intermediate connecting rod.

Preferably, the intermediate connecting rod is made of cast aluminum material.

The utility model also provides a rear suspension system, including foretell rear suspension bush assembly and support assembly, the support assembly includes:

the driving side bracket is connected with the other end of the middle connecting rod, and an assembling hole is formed in the driving side bracket;

a skeleton which is interference fitted into the fitting hole;

and the second inner core is fixed in the framework through rubber vulcanization.

Preferably, the driving side bracket is provided with a bolt fitting hole for achieving fitting with the transmission in the longitudinal direction.

The utility model also provides a car, including foretell back suspension system.

The utility model has the advantages that:

1) The outer framework of the rear suspension bush assembly and the front auxiliary frame are fixed through two first bolts, so that the mounting rigidity of the rear suspension bush assembly and the front auxiliary frame is improved, and the problems of NVH (noise, vibration and harshness) such as accelerated rumble and accelerated roughness caused by low mounting strength are avoided;

2) The rear suspension bushing assembly integrates the advantages of the shoe-shaped gold ingot type suspension, and because the opening of the front auxiliary frame required by the shoe-shaped gold ingot type suspension is smaller, the mode of the front auxiliary frame can be improved, and the complete mode frequency of the front auxiliary frame is reduced;

2) The first bolt for realizing the assembly of the outer framework and the front auxiliary frame is assembled in the horizontal direction instead of from top to bottom, so that the ground clearance of the whole vehicle can be improved, and the replacement and the maintenance are convenient;

3) The outer framework and the middle connecting rod are arranged in a split mode, so that the whole volume of the outer framework is reduced, the rigid body mode of the middle connecting rod is improved, resonance caused by first-order mode of the middle connecting rod and a front auxiliary frame or 2-order excitation coupling of a power assembly is avoided, and accelerated rumbling is avoided;

4) The structure inherits the advantage of small rigidity of a traditional bush type suspension working point, so that the whole vehicle can keep good vibration isolation in the acceleration process, reduce the noise in the vehicle and provide riding comfort; the trafficability of the whole vehicle can be improved, and the maintenance and the replacement are convenient;

5) The rubber with different shapes is vulcanized at multiple positions between the outer framework and the first inner core, the support assembly is pressed by the forward gear limiting rubber and the reverse gear limiting rubber when the forward gear and the reverse gear are in working conditions, the forward gear limiting rubber and the reverse gear limiting rubber cannot be pressed too fast, and when the whole vehicle accelerates, acceleration noise caused by the fact that the rigidity of a working point is large enough due to the fact that the rubber is pressed too fast is avoided.

Drawings

FIG. 1 is a schematic view of the mounting structure of the rear suspension bushing assembly and the bracket assembly on the whole vehicle in the present embodiment;

FIG. 2 is an exploded view of the rear suspension bushing assembly in this embodiment;

FIG. 3 is a cross-sectional view of the rear suspension bushing assembly in this embodiment;

FIG. 4 is a schematic view of the carriage assembly in the present embodiment;

in the drawings, 1-rear suspension bushing assembly; 2-a bracket assembly; 3-front auxiliary frame; 4-a first bolt; 5-a second bolt; 6-third bolt; 11-an exoskeleton; 111-round holes; 112-mounting holes; 12-a first inner core; 13-an intermediate connecting rod; 131-a connection hole; 14-a fourth bolt; 15-reverse gear limit rubber; 16-main spring rubber; 17-forward gear limit rubber; 21-an active side bracket; 211-assembly holes; 212-bolt assembly holes; 22-a backbone; 23-rubber; 24-second inner core.

Detailed Description

As shown in fig. 1, the embodiment of the present invention provides a rear suspension system, which includes a rear suspension bush assembly 1 for connecting with a front subframe 3, a bracket assembly 2 for connecting with a transmission, and a Y-shaped connecting rod 13 for connecting the rear suspension bush assembly 1 and the bracket assembly 2.

As shown in fig. 3, the rear suspension bushing assembly 1 includes a first core 12, an exoskeleton 11, and an intermediate connecting rod 13.

Wherein, the outer frame 11 has two mounting holes 112, and the middle of the forward gear direction of the outer frame 11 is provided with a round hole 111. The mounting hole 112 and the circular hole 111 are arranged horizontally instead of longitudinally in the axial direction. The outer frame 11 passes a mounting hole 112 through two first bolts 4 respectively and realizes the assembly with preceding sub vehicle frame 3 for the first bolt 4 that realizes the assembly of outer frame 11 and preceding sub vehicle frame 3 is not from the top down the assembly but assembles in the horizontal direction, so can improve the ground clearance of whole car, is convenient for change the maintenance. In addition, the outer framework 11 of the rear suspension bush assembly 1 is fixed with the front subframe 3 through the two first bolts 4, so that the mounting rigidity of the rear suspension bush assembly 1 and the front subframe 3 is improved, and the NVH problems of acceleration rumble, acceleration rough sound and the like caused by low mounting strength are avoided. The axial direction of the circular hole 111 is arranged horizontally, so that the occupied area of the middle connecting rod 13 in the longitudinal direction when being assembled with the first inner core 12 can be reduced.

The outer framework 11 and the first inner core 12 are vulcanized together through rubber, and the rubber comprises main spring rubber 16, reverse gear limiting rubber 15 and forward gear limiting rubber 17; the main spring rubber 16 is arranged on two sides of the inner core 12, the reverse gear limiting rubber 15 is arranged in a first cavity close to the front auxiliary frame 3, the forward gear limiting rubber 17 is arranged in a second cavity close to the transmission, and the main spring rubber 16 is arranged in a third cavity connecting the first cavity and the second cavity. The inner core 12 of the forward gear limiting rubber 17 is positioned on two sides, and in order to avoid large rigidity change when the limiting rubber is contacted, the surface of the reverse gear limiting rubber 15 is in a wave shape. Because the rubber that the shape is different between skeleton 11 and the first inner core 12 has been vulcanized in the position of many places, support assembly 2 is in the fender that advances when keeping off with the reverse gear operating mode and is kept off spacing rubber 17 and reverse gear spacing rubber 15 and all compressed, makes the fender that advances spacing rubber 17 and reverse gear spacing rubber 15 can not be dead by the dead-pressing at the excessive speed, when whole car is accelerated, avoids appearing because the rubber is dead by the dead-pressing at the excessive speed and leads to the accelerating noise that operating point rigidity leads to the fact greatly.

The intermediate connecting rod 13 in this embodiment is a cast aluminum material, and has the advantages of light specific mass and high mode shape, the structure of the intermediate connecting rod is similar to a letter "Y", the middle part is a through hole, the intermediate connecting rod 13 is connected with the first inner core 12 through a fourth bolt 14, the first inner core 12 is provided with an internal thread, one side of the internal thread is provided with a sinking platform, and two sides of the sinking platform are provided with positioning pins for positioning and preventing the intermediate connecting rod 13 from rotating. Adopt split type setting with outer frame 11 and intermediate junction pole 13, reduce outer frame 11's whole volume, and then improve the rigid body mode of intermediate junction pole 13 itself, avoid leading to resonance with 3 first-order modes of preceding sub vehicle frame or 2 rank excitation couplings of power assembly, can not produce and accelerate rumble.

Referring to fig. 2 and 4, the stent assembly 2 includes an active-side stent 21, a skeleton 22, and a second core 24. The frame 22 is made of cast aluminum and is provided with two bolt assembling holes 212 for connecting the transmission shell; the framework 22 and the inner core 24 are vulcanized together through rubber 23; and then pressed integrally into the driving side bracket 21 by interference fit. The integrated bracket assembly 2 is connected with the intermediate connection rod 13 by the third bolt 6 passing through the inside of the second core 24.

Referring to fig. 1, the rear suspension bush assembly 1 passes through the mounting hole 111 on the outer frame 11 through 2 first bolts 4 and then is connected with the front subframe 3, the bracket assembly 2 is connected with the transmission through two second bolts 5, and the bracket assembly 2 and the rear suspension bush assembly 1 are fixed through a third bolt 6.

Claims (8)

1. A rear suspension bushing assembly, comprising:

the outer framework (11) and the first inner core (12) are arranged in the outer framework (11), the outer framework (11) and the first inner core (12) are fixed through rubber vulcanization, and rubber is vulcanized at multiple positions surrounding the first inner core (12);

the middle connecting rod (13) partially penetrates through a round hole (111) formed in the outer framework (11) and then extends into the outer framework;

the connection of the intermediate connecting rod (13) to the first inner core (12) is achieved by a first bolt (14) passing through the intermediate connecting rod (13) being screwed into the first inner core (12).

2. A rear suspension bushing assembly according to claim 1, characterized in that mounting holes (112) for fixing with the front sub-frame (3) are provided on both sides of the outer frame (11).

3. A rear suspension bushing assembly according to claim 1, characterized in that a reverse gear limit rubber (15) arranged in an arc shape is vulcanized in a first cavity between the exoskeleton (11) and the first inner core (12), a forward gear limit rubber (17) is vulcanized in a second cavity between the exoskeleton (11) and the first inner core (12), and a main spring rubber (16) is vulcanized in a third cavity between the exoskeleton (11) and the first inner core (12);

the first cavity is close to the front auxiliary frame (3), the second cavity is opposite to the first cavity, and the third cavity is connected with the first cavity and the second cavity.

4. A rear suspension bushing assembly according to claim 1, wherein the intermediate connecting rod (13) is Y-shaped, and a connecting hole (131) is formed at an end of the intermediate connecting rod (13) away from the outer frame (11).

5. A rear suspension bushing assembly according to claim 1, characterized in that the intermediate connecting rod (13) is made of cast aluminum material.

6. A rear suspension system including the rear suspension bushing assembly of any one of claims 1-5 and a carrier assembly, the carrier assembly comprising:

a driving side bracket (21) which is connected with the other end of the middle connecting rod (13), wherein the driving side bracket (21) is internally provided with an assembly hole (211);

a skeleton (22) that is interference-fitted into the fitting hole (211);

and a second inner core (24) which is fixed in the framework (22) through vulcanization of rubber (23).

7. The rear suspension system as claimed in claim 6, wherein the driving side bracket (21) is provided with a bolt fitting hole (212) in a longitudinal direction for enabling fitting with the transmission.

8. An automobile characterized by comprising the rear suspension system of claim 7.

Images