阅读说明：本技术 一种商用车传动轴用气囊式中间支承装置、装配方法及使用方法 (Air bag type intermediate support device for transmission shaft of commercial vehicle, assembling method and using method ) 是由 张玉辛 公彦军 李萌芳 沙迪 张光明 王军 熊增选 刘心亮 于 2020-07-24 设计创作，主要内容包括：本发明提供一种商用车传动轴用气囊式中间支承装置、装配方法及使用方法,包括：轮辋式轴承座；轮辋式轴承座设有相互连接的内圈和外环；内圈的外周压装有轴承；内圈外沿与外环之间设有卡槽；卡槽内安装有弹性挡圈,弹性挡圈用以轴向固定轴承；外环外部装有环状气囊；环状气囊的内侧面与外环面相抵接,环状气囊的外侧面连接有环状组合支架；环状组合支架与车架连接。通过调节气囊气压调整支承总成的径向刚度,从而调整支承总成的固有频率,躲避或扰乱共振频率,提高整车行驶舒适性。同时本装置有效解决硫化橡胶支承的散热问题,提高轴承的使用寿命。装置结构简单,装配工艺简洁方便,性能可靠。(The invention provides an air bag type intermediate support device for a transmission shaft of a commercial vehicle, an assembling method and a using method, wherein the air bag type intermediate support device comprises the following steps: a rim-type bearing seat; the rim type bearing seat is provided with an inner ring and an outer ring which are connected with each other; the periphery of the inner ring is provided with a bearing in a pressing way; a clamping groove is arranged between the outer edge of the inner ring and the outer ring; an elastic retainer ring is arranged in the clamping groove and used for axially fixing the bearing; the outer part of the outer ring is provided with an annular air bag; the inner side surface of the annular air bag is abutted against the outer ring surface, and the outer side surface of the annular air bag is connected with an annular combined bracket; the annular combined bracket is connected with the frame. The radial rigidity of the supporting assembly is adjusted by adjusting the air pressure of the air bag, so that the natural frequency of the supporting assembly is adjusted, the resonance frequency is avoided or disturbed, and the driving comfort of the whole vehicle is improved. Meanwhile, the device effectively solves the heat dissipation problem of the vulcanized rubber bearing, and the service life of the bearing is prolonged. The device has simple structure, simple and convenient assembly process and reliable performance.)

1. An air bag type intermediate support device for a transmission shaft of a commercial vehicle, comprising: a rim type bearing seat (3);

the rim type bearing seat (3) is provided with an inner ring and an outer ring which are connected with each other;

the periphery of the inner ring is provided with a bearing (4) in a pressing way;

a clamping groove is arranged between the outer edge of the inner ring and the outer ring;

an elastic retainer ring (5) is arranged in the clamping groove, and the elastic retainer ring (5) is used for axially fixing the bearing (4);

the outer part of the outer ring is provided with an annular air bag (2);

the inner side surface of the annular air bag (2) is abutted against the outer annular surface, and the outer side surface of the annular air bag (2) is connected with an annular combined bracket (1);

the annular combined bracket (1) is connected with the frame.

2. The air bag type intermediate bearing device for a propeller shaft of a commercial vehicle according to claim 1, wherein,

an inflating valve (6) is arranged on the rim type bearing seat (3), and the inflating valve (6) is communicated with the annular air bag (2).

3. The air bag type intermediate bearing device for a propeller shaft of a commercial vehicle according to claim 1, wherein,

the annular combined bracket (1) is provided with a cross beam and two longitudinal beams;

one end of each longitudinal beam is connected with the two ends of the cross beam respectively.

4. The air bag type intermediate bearing device for a propeller shaft of a commercial vehicle according to claim 3, wherein,

the cross beam is provided with at least two mounting holes (7) and is connected with the frame through bolts.

5. The air bag type intermediate bearing device for a propeller shaft of a commercial vehicle according to claim 3, wherein,

the annular combined bracket (1) is also provided with a lantern ring;

the inner surface of the lantern ring is abutted against the outer side surface of the annular air bag (2);

and a space is arranged between the lantern ring and the outer ring of the rim type bearing seat (3).

6. The air bag type intermediate bearing device for a propeller shaft of a commercial vehicle according to claim 5, wherein,

the outer side surface of the lantern ring is sleeved with the cross beam and the two longitudinal beams.

7. The air bag type intermediate bearing device for a propeller shaft of a commercial vehicle according to claim 2, wherein,

the annular air bag (2) is connected with an inflation and deflation mechanism of the vehicle through an air valve (6).

8. An assembling method for assembling the air bag type intermediate bearing device for a propeller shaft of a commercial vehicle according to any one of claims 1 to 7, comprising:

the bearing is pressed into the rim type bearing seat, and the elastic retainer ring is arranged in the clamping groove on the inner side of the bearing seat to axially fix the bearing;

the inner side of the rim type bearing seat is provided with an inflating valve, and the outer side of the rim type bearing seat is provided with an annular air bag;

the assembled rim type bearing seat and the annular air bag are plugged into the annular combined support, the annular air bag is inflated through the inflating valve, when sufficient air pressure is achieved, the annular air bag expands and becomes large, the inner diameter of the annular air bag is fixed to the rim type bearing seat, and the outer portion of the annular air bag is fixed to the annular combined support;

supplementing enough air pressure according to the bearing requirement of the bearing;

is assembled on the rotating shaft of the vehicle transmission shaft through the inner surface of the bearing;

the transmission shaft is assembled on a frame cross beam or a hanging bracket through the mounting hole of the annular combined bracket, so that the functions of supporting the weight of the transmission shaft and buffering the vibration impact of the transmission shaft are achieved.

9. A method of using the air bag type intermediate bearing device for a propeller shaft of a commercial vehicle according to any one of claims 1 to 7, the method comprising:

in the running process of the automobile, the power of the engine is transmitted to an axle through a transmission and a transmission shaft;

when the shaft rotates at different phases with angular acceleration, the excitation frequency producing the vibration excitation exceeds a threshold, or resonance, or jerk,

the radial rigidity of the air bag type intermediate supporting device is adjusted by adjusting the air pressure of the annular air bag, and the natural frequency of the air bag type intermediate supporting device is changed to avoid or disturb the resonance frequency, so that the effects of eliminating resonance and shaking are achieved.

Technical Field

The invention relates to the technical field of commercial vehicle transmission shafts, in particular to an air bag type intermediate support device for a commercial vehicle transmission shaft, an assembling method and a using method.

Background

The long-wheelbase commercial vehicle needs to be provided with more than two transmission shafts to realize power transmission, and the transmission shaft intermediate supporting device fixes the front and rear transmission shafts on a frame cross beam and has the functions of bearing the weight of the transmission shafts and buffering axial and radial impact generated in the operation of the transmission shafts. The excitation generated in the working process of the transmission shaft is transmitted to the frame through the middle support, and if the excitation frequency is consistent with the frequency of a running system, resonance is easily formed, so that the problems of shaking and abnormal sound of the whole vehicle are caused, and the running comfort of the whole vehicle is influenced.

At present, a transmission shaft intermediate bearing generally adopts a vulcanized rubber structure, the rubber structure is complex and various so as to achieve different buffering effects, but the inherent rigidity becomes a fixed value after the structure is shaped, and the inherent vibration frequency cannot be changed. Once the first-order or second-order frequency of the transmission shaft is close to the intermediate bearing frequency, the resonance phenomenon is easily caused, and the intermediate bearing rigidity cannot be adjusted to avoid the resonance frequency; in addition, the vulcanized rubber has a heavy structure and poor heat dissipation performance, and the service life of the bearing is influenced.

Disclosure of Invention

In order to improve the driving comfort of the whole vehicle and reduce the problems of resonance, shake and abnormal sound caused by the approach of the excitation frequency of the transmission shaft and the frequency of a driving system. The air bag type intermediate supporting device for the transmission shaft of the commercial vehicle, provided by the invention, has the advantages of simple structure, convenience in installation, excellent buffering performance and adjustable radial rigidity.

The device comprises: a rim-type bearing seat;

the rim type bearing seat is provided with an inner ring and an outer ring which are connected with each other;

the periphery of the inner ring is provided with a bearing in a pressing way;

a clamping groove is arranged between the outer edge of the inner ring and the outer ring;

an elastic retainer ring is arranged in the clamping groove and used for axially fixing the bearing;

the outer part of the outer ring is provided with an annular air bag;

the inner side surface of the annular air bag is abutted against the outer ring surface, and the outer side surface of the annular air bag is connected with an annular combined bracket;

the annular combined bracket is connected with the frame.

It should be further noted that an inflating valve is arranged on the rim type bearing seat and is communicated with the annular air bag.

It is further noted that the annular combined bracket is provided with a cross beam and two longitudinal beams;

one end of each longitudinal beam is connected with the two ends of the cross beam respectively.

The beam is provided with at least two mounting holes and is connected with the frame through bolts.

It is further noted that the annular combined bracket is also provided with a lantern ring;

the inner surface of the lantern ring is abutted with the outer side surface of the annular air bag;

and a space is arranged between the lantern ring and the outer ring of the rim type bearing seat.

The outer side surface of the lantern ring is sleeved with the cross beam and the two longitudinal beams.

The invention also provides an assembly method, which comprises the following steps:

the bearing is pressed into the rim type bearing seat, and the elastic retainer ring is arranged in the clamping groove on the inner side of the bearing seat to axially fix the bearing;

the inner side of the rim type bearing seat is provided with an inflating valve, and the outer side of the rim type bearing seat is provided with an annular air bag;

the assembled rim type bearing seat and the annular air bag are plugged into the annular combined support, the annular air bag is inflated through the inflating valve, when sufficient air pressure is achieved, the annular air bag expands and becomes large, the inner diameter of the annular air bag is fixed to the rim type bearing seat, and the outer portion of the annular air bag is fixed to the annular combined support;

sufficient air pressure is supplemented according to the bearing requirement of the bearing.

Is assembled on the rotating shaft of the vehicle transmission shaft through the inner surface of the bearing;

the transmission shaft is assembled on a frame cross beam or a hanging bracket through the mounting hole of the annular combined bracket, so that the functions of supporting the weight of the transmission shaft and buffering the vibration impact of the transmission shaft are achieved.

The invention also provides a using method, which comprises the following steps:

in the running process of the automobile, the power of the engine is transmitted to an axle through a transmission and a transmission shaft;

when the shaft rotates at different phases with angular acceleration, the excitation frequency producing the vibration excitation exceeds a threshold, or resonance, or jerk,

the radial rigidity of the air bag type intermediate supporting device is adjusted by adjusting the air pressure of the annular air bag, and the natural frequency of the air bag type intermediate supporting device is changed to avoid or disturb the resonance frequency, so that the effects of eliminating resonance and shaking are achieved.

According to the technical scheme, the invention has the following advantages:

the air bag type intermediate supporting device for the transmission shaft of the commercial vehicle adjusts the radial rigidity of the supporting assembly by adjusting the air pressure of the air bag, so that the natural frequency of the supporting assembly is adjusted, the resonance frequency is avoided or disturbed, and the driving comfort of the whole vehicle is improved. Meanwhile, the device effectively solves the heat dissipation problem of the vulcanized rubber bearing, and the service life of the bearing is prolonged.

The device has simple structure, simple and convenient assembly process and reliable performance.

The bearing seat of the device adopts a rim type structure, the inner part of the bearing seat can fix the bearing through an elastic retainer ring, and the outer side of the bearing seat can be assembled with an annular air bag. The functions of fixing the bearing, bearing load and assembling the air bag are integrated.

The closed air bag device has excellent buffering performance after the annular air bag of the device is matched with the rim type bearing seat, and meanwhile, the internal air pressure can be adjusted through the inflating valve, so that different rigidity performances of the supporting assembly can be adjusted.

The annular air bag cavity of the device is large, the heat dissipation performance is good, heat generated by the operation of the bearing can be rapidly transferred and released, and the working environment of the bearing is improved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a front view of an air bag type intermediate support device for a transmission shaft of a commercial vehicle;

FIG. 2 is a side cross-sectional view of an air bag type intermediate support device for a propeller shaft of a commercial vehicle;

fig. 3 is an axial view of an air bag type intermediate bearing device for a propeller shaft of a commercial vehicle.

Description of reference numerals:

the combined support comprises an annular combined support 1, an annular air bag 2, a rim type bearing seat 3, a bearing 4, a circlip 5, an inflating valve 6, a support mounting hole 7, a cross beam 11, a longitudinal beam 12 and a sleeve ring 13.

Detailed Description

The present invention provides an air bag type intermediate support device for a transmission shaft of a commercial vehicle, as shown in fig. 1 to 3, comprising: a rim type bearing seat 3;

the rim type bearing seat 3 is provided with an inner ring and an outer ring which are connected with each other; the periphery of the inner ring is provided with a bearing 4 in a pressing way; a clamping groove is arranged between the outer edge of the inner ring and the outer ring; an elastic retainer ring 5 is arranged in the clamping groove, and the elastic retainer ring 5 is used for axially fixing the bearing 4; the outer part of the outer ring is provided with an annular air bag 2; the inner side surface of the annular air bag 2 is abutted against the outer annular surface, and the outer side surface of the annular air bag 2 is connected with an annular combined bracket 1; the annular combined bracket 1 is connected with a frame.

It will be understood that when an element or layer is referred to as being "on," connected to, "or" coupled to "another element or layer, it can be directly on, connected or coupled to the other element or layer, and intervening elements or layers may also be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Spatially relative terms such as "under …", "below", "lower", "above", "over", and the like, as may be used herein for ease of description, describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

In the embodiment of the present invention, the rim type bearing seat 3 is of a rim type structure, the rim type bearing seat 3 is provided with an air valve 6, and the air valve 6 is communicated with the annular air bag 2. The annular air bag 2 can be inflated and deflated, and the annular air bag 2 is connected with an inflating and deflating mechanism of the vehicle through an air valve 6. The inflation and deflation mechanism can be provided with a control electromagnetic valve, and a control module such as a controller and the like is arranged in the cab for automatic control to adjust the inflation and deflation amount.

The annular air bag 2 is used as an inflatable bearing mechanism of the supporting device, and the air pressure of the air bag is adjusted by inflating and deflating the inflating valve 6, so that the radial rigidity change of the supporting assembly is realized.

As an embodiment of the present invention, the annular combined bracket 1 is provided with a cross beam 11 and two longitudinal beams 12; one ends of the two longitudinal beams 12 are respectively connected with two ends of the cross beam 11.

The cross beam 11 is provided with at least two mounting holes 7 and is connected with the frame through bolts. The annular combined bracket 1 is also provided with a lantern ring 13; the inner surface of the lantern ring 13 is abutted with the outer side surface of the annular air bag 2; and a space is arranged between the lantern ring and the outer ring of the rim type bearing seat 3. The cross beam 11 and the two longitudinal beams 12 are sleeved on the outer side surface of the lantern ring 13.

Thus, the air bag is fixed on the inner side of the rim type bearing seat through the elastic retainer ring, the annular air bag is arranged on the outer side of the rim type bearing seat, and then the annular air bag is sleeved into the outer fixed support to be assembled into an assembly. The bearing and the air bag are respectively fixed inside and outside through the rim type bearing seat, and the air pressure in the air bag is adjusted through inflation and deflation, so that the radial rigidity of the support assembly can be changed. The air bag structure of the middle support has excellent buffering performance, the vibration impact of the rotation of the transmission shaft on the frame is relieved, and compared with a rubber support structure, the heat dissipation capacity of the bearing is improved; the radial rigidity of the middle support can be further changed by charging and discharging the air pressure of the air-conditioning air bag, so that the resonance frequency of the whole vehicle in the running process is avoided or disturbed. The purposes of reducing the noise of the whole vehicle and improving the driving comfort are achieved.

The invention also provides an assembly method based on the air bag type intermediate support device for the transmission shaft of the commercial vehicle, which comprises the following steps:

the bearing is pressed into the rim type bearing seat, and the elastic retainer ring is arranged in the clamping groove on the inner side of the bearing seat to axially fix the bearing;

the inner side of the rim type bearing seat is provided with an inflating valve, and the outer side of the rim type bearing seat is provided with an annular air bag;

the assembled rim type bearing seat and the annular air bag are plugged into the annular combined support, the annular air bag is inflated through the inflating valve, when sufficient air pressure is achieved, the annular air bag expands and becomes large, the inner diameter of the annular air bag is fixed to the rim type bearing seat, and the outer portion of the annular air bag is fixed to the annular combined support;

sufficient air pressure is supplemented according to the bearing requirement of the bearing.

Is assembled on the rotating shaft of the vehicle transmission shaft through the inner surface of the bearing;

the transmission shaft is assembled on a frame cross beam or a hanging bracket through the mounting hole of the annular combined bracket, so that the functions of supporting the weight of the transmission shaft and buffering the vibration impact of the transmission shaft are achieved.

Therefore, the annular combined bracket 1 can fix the annular air bag 2 in an annular manner, so that the annular air bag is stressed uniformly to bear the pressure and impact of the bearing, and meanwhile, the supporting assembly can be fixed on a frame through the mounting hole 7, so that the structure is simple and the installation is convenient.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description in this document. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

In order to improve the driving comfort of the whole vehicle and reduce the problems of resonance, shake and abnormal sound caused by the approach of the excitation frequency of the transmission shaft and the frequency of a driving system. By providing the using method which has the advantages of simple structure, convenience in installation, excellent buffering performance and adjustable radial rigidity, the method comprises the following steps:

in the running process of the automobile, the power of the engine is transmitted to an axle through a transmission and a transmission shaft;

when the shaft rotates at different phases with angular acceleration, the excitation frequency producing the vibration excitation exceeds a threshold, or resonance, or jerk,

the radial rigidity of the air bag type intermediate supporting device is adjusted by adjusting the air pressure of the annular air bag, and the natural frequency of the air bag type intermediate supporting device is changed to avoid or disturb the resonance frequency, so that the effects of eliminating resonance and shaking are achieved.

The invention can adjust the radial rigidity of the supporting assembly by adjusting the air pressure of the air bag, thereby adjusting the natural frequency of the supporting assembly, avoiding or disturbing the resonance frequency and improving the driving comfort of the whole vehicle. Meanwhile, the device effectively solves the heat dissipation problem of the vulcanized rubber bearing, and the service life of the bearing is prolonged.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.