CN216833176U

CN216833176U - Suspension bush and suspension assembly

Info

Publication number: CN216833176U
Application number: CN202220192045.3U
Authority: CN
Inventors: 钱学朋; 李芳�; 杜鹏程; 乌吉斯古楞; 王飞; 柴雅聪; 柴建伟
Original assignee: Nuobo Rubber Production Co Ltd
Current assignee: Nuobo Rubber Production Co Ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-06-28
Anticipated expiration: 2032-01-24

Abstract

The utility model provides a suspension bush and suspension assembly, the utility model discloses a suspension bush includes inner core, outer tube and the rubber main spring that links together both, and wherein, the one end of outer tube is formed with the spacing turn-ups that turns up the setting, and the both ends of rubber main spring are formed with the notch respectively to be equipped with along suspension bush axially extended's recess in the bottom of notch, and the notch at both ends all is the cyclic annular of arranging along suspension bush circumference with the recess. The utility model discloses a suspension bush can reduce the quiet rigidity of suspension bush to through the adjustment to the notch parameter, also can adjust the radial and axial rigidity ratio of suspension bush, and have better result of use.

Description

Suspension bush and suspension assembly

Technical Field

The utility model relates to a power assembly suspension system technical field, in particular to suspension bush. The utility model discloses still relate to the suspension assembly of installing this suspension bush.

Background

In a new energy automobile, a motor serving as a finished automobile driving source is usually connected in an automobile body through a suspension, vibration of the motor and road excitation force are transmitted to the automobile body through the suspension, and the transmission of the vibration and noise of the motor to the automobile body is influenced by the design of the suspension vibration isolation performance, so that the riding comfort-NVH (noise, vibration and harshness) characteristic of the finished automobile is determined. The suspension with good performance can reduce the transmission of vibration and noise to the automobile body, improve the riding comfort of the automobile and protect the motor.

At present, cross-shaped bushings or solid bushings are mostly adopted in motor suspensions on the market, wherein the durability of the cross-shaped bushings is poor, and the rigidity of the solid bushings is high, so that the NVH (noise, vibration and harshness) characteristics are poor. In addition, the existing suspension structure is difficult to limit with six degrees of freedom, so that the using effect is poor.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a suspension bushing to effectively reduce the stiffness ratio of the suspension bushing.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a suspension bushing comprises an inner core, an outer pipe and a rubber main spring, wherein the inner core and the outer pipe are connected together, a limiting flanging arranged in an outward turning mode is formed at one end of the outer pipe, notches are formed at two ends of the rubber main spring respectively, a groove extending along the axial direction of the suspension bushing is formed in the bottom of each notch, and the notches at the two ends and the groove are both annular and are arranged along the circumferential direction of the suspension bushing.

Further, the side walls of the two sides of the groove are provided with draft angles, and the groove is gradually reduced along the radial width of the suspension bushing along the depth direction of the groove.

Furthermore, the draft of the side walls of the two sides of the groove is 1-4 degrees, and the width L of the notch part of the groove is 1-3 mm.

Furthermore, at the end of the suspension bushing with the limiting flange, the end face of the inner core is higher than the limiting flange.

Furthermore, the rubber main spring is provided with a limiting colloid which covers the limiting flanging.

Furthermore, the limiting colloid is provided with noise reduction protrusions which are arranged along the circumferential direction of the limiting colloid at intervals.

Furthermore, for the end with the limiting flanging, the other end of the outer pipe is provided with a press-fitting chamfer.

Furthermore, the suspension bush is provided with an opening which is arranged along the axial direction of the suspension bush, the opening is one opening arranged on one side of the suspension bush, or the openings are two openings which are respectively arranged on two opposite sides of the suspension bush, and the opening penetrates through the outer pipe and the rubber main spring on one side.

Compared with the prior art, the utility model discloses following advantage has:

suspension bush through set up the notch at rubber main spring both ends to and set up the recess along suspension bush axial extension in the notch bottom, can effectively reduce the quiet rigidity of traditional solid bush, and through the adjustment to the notch parameter, for example shape and size etc. of notch, also can adjust the radial and axial rigidity ratio of suspension bush, thereby better result of use has.

In addition, the side walls of the two sides of the groove are provided with draft angles, which is beneficial to the processing and manufacturing of the rubber main spring. At the one end that has spacing turn-ups of suspension bush, the terminal surface of inner core is higher than spacing turn-ups for form hard spacing between outer tube and the component that is connected, and form soft spacing between inner core and the component that links to each other, so can have better spacing effect.

And the preferred spacing colloid that sets up on spacing turn-ups, the manufacturing of the suspension bush of being convenient for on the one hand, on the other hand can have better spacing effect with between the component that links to each other. Meanwhile, noise reduction bulges are formed on the limiting colloid, so that the NVH performance can be improved. In addition, the installation of suspension bush is favorable to the pressure equipment chamfer of setting. Through the arrangement of the opening, the press fitting of the suspension bushing during use can be facilitated.

Another object of the present invention is to provide a suspension assembly, which includes a base body having a bushing mounting hole, and further includes the suspension bushing pressed in the bushing mounting hole; the suspension bushing is pressed in from one end of the bushing mounting hole; the limiting flanging in the suspension bushing is abutted against the outer edge of the bushing mounting hole.

Further, the base body is a suspension support, and a support connecting hole is formed in the suspension support, or the base body is an auxiliary frame.

The utility model discloses a suspension assembly not only can reduce high frequency dynamic stiffness through adopting foretell suspension bush to utilize spacing turn-ups design, spacing when also can do benefit to the suspension assembly and use, therefore can compromise the durability that the suspension bush used and the operating stability of whole car, and can promote the NVH performance.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a suspension bushing according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of another view angle of the suspension bushing according to the first embodiment of the present invention;

fig. 3 is a cross-sectional view of a suspension bushing according to a first embodiment of the present invention;

fig. 4 is a schematic structural view of the single-sided opening of the first embodiment of the present invention;

fig. 5 is a schematic structural view of the first embodiment of the present invention when openings are formed on two sides;

fig. 6 is a schematic structural diagram of a suspension assembly according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a suspension assembly according to a third embodiment of the present invention;

description of the reference numerals:

1. a suspension bracket; 101. a bushing mounting hole; 102. a bracket connection hole; 2. a suspension bushing; 201. an inner core; 2011. mounting holes; 2012. a hole groove; 202. an outer tube; 2021. pressing and chamfering; 2022. limiting and flanging; 203. a rubber main spring; 2031. a recess; 2032. a groove; 2033. a limiting colloid; 2034. a noise reduction projection; 204. an opening; 3. and (3) a subframe.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The present embodiment relates to a suspension bushing, which comprises an inner core 201, an outer tube 202, and a main rubber spring 203 connecting the two together, in an integral configuration, as shown in fig. 1 to 3. Wherein, the limit flange 2022 that the one end of outer tube 202 was formed with the evagination and is set up, and the both ends of rubber master spring 203 are formed with notch 2031 respectively to be equipped with along the recess 2032 of suspension bush 2 axial extension in the bottom of notch 2031, and the notch 2031 at both ends all is the cyclic annular along suspension bush 2 circumference arrangement with recess 2032.

The suspension bush 2 of the embodiment can effectively reduce the static stiffness of the conventional solid bush by the recesses 2031 provided at both ends of the rubber main spring 203 and the grooves 2032 provided at the bottom of the recesses 2031 and extending along the axial direction of the suspension bush 2, and can also adjust the stiffness ratio of the suspension bush 2 in the radial direction and the axial direction by adjusting the parameters of the recesses 2031 and the grooves 2032, such as the shape and the size of the recess 2031.

Specifically, as shown in fig. 1 to 3, the suspension bushing 2 of the present embodiment includes an inner core 201, a main rubber spring 203, and an outer tube 202 in this order from inside to outside. The outer tube 202 is preferably made of a metal material having a certain strength, such as a steel material. The inner core 201 is of a cylindrical structure in the whole structure, the axis of the inner core 201 is provided with a mounting hole 2011, a plurality of long-strip-shaped hole grooves 2012 are arranged on the end face of the inner core 201 at intervals, and each hollow hole groove 2012 extends along the axial direction of the inner core 201 to facilitate lightweight design.

In addition, recesses 2031 are formed at both ends of the rubber main spring 203, respectively, and a groove 2032 extending in the axial direction of the suspension bushing 2 is provided at the bottom of the recess 2031, and the recesses 2031 and the groove 2032 at both ends are each in the shape of a ring arranged in the circumferential direction of the suspension bushing 2. The shape of the recess 2031 and the groove 2032 in the longitudinal section of the suspension bushing 2, as shown in fig. 3, is a zigzag shape, which is simple and easy to machine.

To facilitate the molding of the groove 2032 and the processing and manufacturing of the main rubber spring 203, in this embodiment, the two side walls of the groove 2032 have draft angles, and the width of the groove 2032 along the radial direction of the suspension bushing 2 is made to be gradually smaller along the depth direction of the groove 2032.

In a preferred embodiment, the draft angles of the sidewalls of the groove 2032 are between 1 ° and 4 °, and during the manufacturing process, the draft angle may be 1 °, 2 °, 3 °, or 4 °, for example, to ensure the processing accuracy of the rubber main spring and facilitate the demolding of the rubber main spring. In a further preferred embodiment, the width L of the notch portion of the groove 2032 is 1 to 3mm, and the value of L may be 1mm, 1.5mm, 2mm, 2.5mm, or 3mm, for example.

It should be noted that, in addition to the above configuration, the shape and size of the recess 2031 and the groove 2032 of the embodiment may also be adapted to the parameter configuration of the recess 2031 and the groove 2032 according to the actual use requirement, so as to meet the use requirement.

As a further improvement of this embodiment, in this embodiment, at the end of the suspension bushing 2 having the limit flange 2022, the end surface of the inner core 201 is higher than the limit flange 2022, so that a hard limit is formed between the outer tube 202 and the connected component, and a soft limit is formed between the inner core 201 and the connected component, which can have a better limit effect.

Based on the above structure, and as a preferred embodiment, the rubber main spring 203 of the present embodiment has the limiting colloid 2033 covering the limiting flange 2022, so that a soft limiting is formed between the limiting colloid 2033 and the adjacent component, so as to improve the NVH performance.

As a further preferred embodiment of this embodiment, the limiting colloid 2033 is formed with noise reducing protrusions 2034, and the noise reducing protrusions 2034 are a plurality of protrusions arranged at intervals along the circumferential direction of the limiting colloid 2033, thereby further improving NVH performance.

It should be noted that the shape, size and number of the noise reducing protrusions 2034 of the present embodiment are not limited, and may be adjusted adaptively according to actual requirements.

In addition, in order to facilitate the press-fitting of the suspension bushing 2, in this embodiment, the other end of the outer tube 202 is provided with a press-fitting chamfer 2021, opposite to the end with the limit flange 2022, that is, the press-fitting chamfer 2021 and the limit flange 2022 are respectively arranged at two ends of the outer tube 202.

However, also in order to facilitate the press-fitting of the suspension bushing 2 of the present embodiment, an opening 204 arranged along the axial direction of the suspension bushing may be further provided on the suspension bushing. At this time, as shown in fig. 4, the opening 204 may be one provided at one side of the suspension bushing, or, as shown in fig. 5, the opening 204 may be two provided at two opposite sides of the suspension bushing.

Meanwhile, regardless of whether the opening 204 is provided on one side or the openings 204 are provided on two opposite sides, the opening 204 of the present embodiment is specifically provided through the outer tube 202 and the rubber main spring 203 on the side where the opening is provided. Therefore, when the suspension bushing is pressed, the outer pipe 202 is partially contracted at the position of the opening 204, so that the whole suspension bushing can be smoothly pressed in, and the interference fit of the suspension bushing is realized.

The suspension bush 2 of this embodiment can effectively reduce the rigidity ratio of suspension bush 2 to can adjust the radial and axial rigidity ratio of suspension bush 2 through the adjustment to notch 2031, recess 2032 parameter, simultaneously, also can compromise the use durability and the NVH performance of suspension bush 2, and have fine practicality.

Example two

The present embodiment relates to a suspension assembly including a base body having a bushing mounting hole 101, and further including a suspension bushing 2 as in the first embodiment press-fitted in the bushing mounting hole 101.

An exemplary structure of the suspension assembly of the present embodiment is shown in fig. 6, in which the base body of the suspension assembly is a suspension bracket 1 having a bushing mounting hole 101, and a suspension bushing 2 as in the first embodiment is press-fitted into the bushing mounting hole 101. The suspension bush 2 is pressed in from one end of the bush mounting hole 101, and the limit flange 2022 in the suspension bush 2 abuts against the outer edge of the bush mounting hole 101.

The present embodiment is also provided with a plurality of bracket attachment holes 102 on the suspension bracket 1. In addition, it should be noted that the suspension assembly of the present embodiment may be a motor suspension, so as to be used for mounting a motor in a new energy automobile in a vehicle body when in use. At this time, the suspension bracket 1 is also a motor bracket connected to a motor, and specifically, the suspension bracket 1 is connected to the motor through a bracket connection hole 102, and the suspension bushing 2 is connected to the vehicle body through a bolt structure.

The suspension assembly of this embodiment not only can reduce high frequency dynamic stiffness through adopting the suspension bush 2 of embodiment one, utilizes the design of spacing turn-ups 2022 on the suspension bush 2 moreover, can make the suspension assembly have better spacing, therefore it can compromise the durability that suspension bush 2 used and the operating stability of whole car to can promote the NVH performance, and have better result of use.

EXAMPLE III

The present embodiment also relates to a suspension assembly, as shown in fig. 7, in the present embodiment, the base body of the suspension assembly is a subframe 3, the subframe is provided with a bushing mounting hole 101, in this case, the suspension bushing 2 of the first embodiment is pressed in from one end of the bushing mounting hole 101, and the suspension bushing 2 can also be connected to the power unit through a bolt structure.

The suspension assembly of this embodiment through adopting the suspension bush 2 of embodiment one, is favorable to reducing the high frequency dynamic stiffness of sub vehicle frame, and also can improve sub vehicle frame and transmit vibration and noise to the car in, and does benefit to and promote whole car NVH performance.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A suspension bushing comprising an inner core (201), an outer tube (202) and a main rubber spring (203) connecting the two together, characterized in that: an everting limiting flange (2022) is formed at one end of the outer pipe (202), notches (2031) are formed at two ends of the rubber main spring (203), grooves (2032) extending along the axial direction of the suspension bushing (2) are formed at the bottom of the notches (2031), and the notches (2031) and the grooves (2032) at two ends are both in a ring shape arranged along the circumferential direction of the suspension bushing (2).

2. The suspension liner of claim 1, wherein:

the side walls of the two sides of the groove (2032) are provided with draft angles, and the width of the groove (2032) along the radial direction of the suspension bushing (2) is gradually reduced along the depth direction of the groove (2032).

3. The suspension bushing of claim 2, wherein:

the draft angle of the side walls of the two sides of the groove (2032) is 1-4 degrees, and the width L of the notch part of the groove (2032) is 1-3 mm.

4. The suspension liner of claim 1, wherein:

at one end of the suspension bushing (2) with the limiting flanging (2022), the end surface of the inner core (201) is higher than the limiting flanging (2022).

5. The suspension liner of claim 1, wherein:

the rubber main spring (203) is provided with a limiting colloid (2033) covered on the limiting flanging (2022).

6. The suspension liner of claim 5, wherein:

noise reduction protrusions (2034) are formed on the limiting colloid (2033), and the noise reduction protrusions (2034) are arranged along the limiting colloid (2033) at intervals in the circumferential direction.

7. The suspension liner of claim 1, wherein:

and the other end of the outer pipe (202) is provided with a press-fitting chamfer (2021) relative to the end with the limit flanging (2022).

8. The suspension liner according to any one of claims 1 to 7, wherein:

the suspension bushing is provided with openings (204) which are arranged along the axial direction of the suspension bushing, the openings (204) are arranged on one side of the suspension bushing, or the openings (204) are respectively arranged on two opposite sides of the suspension bushing, and the openings (204) penetrate through the outer tube (202) and the main rubber spring (203) on one side.

9. A suspension assembly, characterized by:

comprising a base body having a bushing mounting hole (101), further comprising a suspension bushing (2) according to any of claims 1 to 8 press-fitted in the bushing mounting hole (101);

the suspension bushing (2) is pressed in from one end of the bushing mounting hole (101);

the limiting flanging (2022) in the suspension bushing (2) is abutted against the outer edge of the bushing mounting hole (101).

10. The suspension assembly of claim 9, wherein:

the base member is suspension support (1), be equipped with support connecting hole (102) on suspension support (1), perhaps, the base member is the sub vehicle frame.