Non-drive axle and vehicle

Abstract

The utility model discloses a non-drive axle and a vehicle, the non-drive axle according to the embodiment of the utility model comprises a middle section and mounting sections connected to the two ends of the middle section in the length direction, and the size of the mounting sections in the front-back direction is smaller than the size of the middle section in the front-back direction. The middle section comprises two transition sections, and the size of each transition section in the front-back direction is gradually increased in the direction facing each other. According to the non-driving axle, the size of the middle section in the front-back direction is increased, so that the modal frequency of the non-driving axle in the front-back direction is improved, the vibration mode is restrained, modal resonance of the non-driving axle and a vehicle body sound cavity in the running process of vehicles of some models can be effectively relieved, the in-vehicle noise value is effectively reduced, and the in-vehicle sound quality is improved. Meanwhile, the size increasing position of the middle section in the front-back direction is transited through the transition section, the stress concentration area of the non-driving axle is reduced, and the cracking risk of fatigue durability is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle components, in particular to a non-driving axle and a vehicle. Background Art

[0002] In general vehicles, non-driven axles usually adopt a tubular beam structure, and the two ends of the tubular beam are connected to the vehicle body or frame through leaf springs. Different types of vehicles need to match non-driven axles of different sizes. The non-driven axles of some types of vehicles are easy to overlap with the modal frequency of the vehicle body, which can easily excite the acoustic cavity modal resonance. Especially when the vehicle is driving on a rough road, the road noise in the car increases and a roaring sound occurs. Therefore, there is room for improvement. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a non-driven axle, increase the modal frequency, so as to avoid the non-driven axle mode and the body acoustic cavity mode of some models of vehicles, so that the two modes do not resonate, thereby reducing noise.

[0004] The utility model also provides a vehicle.

[0005] According to an embodiment of the utility model, the non-driven axle includes a middle section and mounting sections connected to both ends of the middle section in the length direction, the front-to-back dimension of the mounting section is smaller than the front-to-back dimension of the middle section, and the middle section includes two gradient sections; the front-to-back dimension of each gradient section gradually increases in the direction toward each other.

[0006] According to the non-driven axle of the embodiment of the utility model, the non-driven axle increases the size of the middle section in the front-to-back direction, thereby increasing the modal frequency of the non-driven axle in the front-to-back direction, suppressing the vibration type, and effectively alleviating the modal resonance between the non-driven axle and the body sound cavity during the driving of some models of vehicles, and effectively reducing the noise value inside the vehicle. At the same time, the middle section's front-to-back size increases through a gradual transition section, reducing the stress concentration area of ​​the non-driven axle and reducing the risk of fatigue cracking. In addition, the non-driven axle can be connected to other structures of the vehicle through the mounting section without redesigning or changing the size of the surrounding components of the non-driven axle, reducing the cost of design changes, and the quality change range is small, which has little impact on the weight of the entire vehicle.

[0007] In some embodiments, the middle section further includes a first wide section, and the two gradient sections are connected to both ends of the first wide section in the length direction, and the front-to-back dimension of each gradient section gradually increases in the direction toward the first wide section.

[0008] In some embodiments, the middle section also includes: two second wide sections, the two second wide sections are arranged corresponding to the two gradient sections, each second wide section is connected between the gradient section and the mounting section, and the cross-sectional shape and size of the second wide section are equal to those of the corresponding mounting section.

[0009] In some embodiments, the front-to-back dimensions of the first wide section are equal at all locations along its length.

[0010] In some embodiments, the gradient section, the first wide section, and the second wide section are all connected by arc transition.

[0011] In some embodiments, the non-driven axle is a tube.

[0012] In some embodiments, the middle section includes two half shells, and the two half shells are butt-jointed along the front-to-back direction.

[0013] In some embodiments, the two half shells are connected by welding, and the middle section and the mounting section are connected by welding.

[0014] In some embodiments, the height of the non-driven axle is equal at all locations in the length direction.

[0015] The vehicle according to the embodiment of the utility model includes a body; a non-driven axle according to the embodiment of the utility model, the non-driven axle is located under the body; two shock-absorbing structures, the two shock-absorbing structures are respectively located on the two mounting sections of the non-driven axle and connected to the body; two wheel structures, each of the wheel structures has a wheel fixing bracket, and the wheel fixing bracket is fixedly connected to the mounting section.

[0016] According to the vehicle implemented in the utility model, by setting the above-mentioned non-driven axle, while strengthening the non-driven axle in the front-to-back direction, the design size of the installation section is maintained, so that the design state of the wheel fixing bracket, leaf spring mounting bracket, shock absorber mounting bracket, etc. connected to the mounting section is free from change, and the design change cost is reduced while strengthening the non-driven axle. At the same time, according to the non-driven axle of the embodiment of the utility model, the non-driven axle increases the size of the middle section in the front-to-back direction, thereby increasing the modal frequency of the non-driven axle in the front-to-back direction, suppressing the vibration type, and effectively alleviating the modal resonance between the non-driven axle and the body sound cavity during the driving of some models of vehicles, and effectively reducing the noise value in the car. At the same time, the transition of the middle section where the front-to-back direction size becomes larger is through a gradual section, reducing the stress concentration area of ​​the non-driven axle and reducing the risk of fatigue durability cracking. In addition, the non-driven axle can be connected to other structures of the vehicle through the mounting section without redesigning or changing the size of the surrounding components of the non-driven axle, reducing the design change cost, and the quality change range is small, which has little impact on the weight of the whole vehicle.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a non-driven axle according to an embodiment of the utility model at a viewing angle;

[0020] Figure 2 is a schematic diagram of a non-driven axle according to an embodiment of the utility model at another viewing angle;

[0021] Figure 3 is a comparison diagram of wheel center force and road noise simulation results of the cross-section variation of the non-driven axle using CAE in some embodiments;

[0022] Figure 4 is a comparison diagram of in-vehicle noise results before and after the non-driving axle cross section is changed in actual vehicle testing in some embodiments;

[0023] Figure 5 is a stress cloud diagram of a finite element analysis when the cross section of a non-driving axle is unchanged in some embodiments;

[0024] Figure 6 Yes Figure 5 In the embodiment, a finite element analysis stress cloud diagram of a middle section of a non-driving axle cross section after the front-to-back dimension is enlarged.

[0025] Reference numerals:

[0026] Non-driven axle 100;

[0027] Middle section 1, gradual section 10, first wide section 11, second wide section 12;

[0028] Install segment 2. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present utility model, it is necessary to understand that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Reference below Figure 1-Figure 6 A non-driven axle 100 and a vehicle according to an embodiment of the present invention are described.

[0033] like Figure 1 and Figure 2 As shown, the non-drive axle 100 according to the embodiment of the present utility model includes a middle section 1 and a mounting section 2 .

[0034] The middle section 1 extends along the length direction, and the size of the middle section 1 in the length direction is greater than the size of the middle section 1 in the front-rear direction. It should be further explained that the front-rear direction is usually the driving direction of the vehicle, the height direction is consistent with the gravity direction, and the height direction is perpendicular to the ground. The length direction is perpendicular to the front-rear direction and the height direction, and usually the length direction is consistent with the left-right direction of the vehicle.

[0035] The mounting section 2 is connected to both ends of the middle section 1 in the length direction. There are two mounting sections 2, and one mounting section 2, the middle section 1 and the other mounting section 2 on the non-driving axle 100 are sequentially arranged along the length direction of the non-driving axle 100. In the front-to-back direction, the size of the mounting section 2 is smaller than that of the middle section 1. The middle section 1 also includes two gradient sections 10. The two gradient sections 10 are facing each other, and the front-to-back size of each gradient section 10 gradually increases. The gradient section 10 is located between the middle section 1 and the mounting section 2, and the gradient section 10 is the transition from the middle section 1 to the mounting section 2. That is to say, the non-driving axle 100 increases the size of the middle section 1 in the front-to-back direction, thereby increasing the modal frequency of the non-driving axle 100 in the front-to-back direction, suppressing the vibration shape, avoiding the modal resonance between the non-driving axle 100 and the body sound cavity during the vehicle driving process, and effectively reducing the noise value inside the vehicle. At the same time, the transition between the middle section 1 and the mounting section 2 is through the gradient section 10, reducing the stress concentration area of ​​the non-driving axle 100 and reducing the risk of fatigue durability cracking.

[0036] In the related technology, the non-driven axle adopts a tubular beam structure with a constant cross-section. In some technical solutions, the wall thickness of the non-driven axle is increased to improve the mode of the non-driven axle. Compared with the non-driven axle with a tubular beam structure with a constant cross-section, the mode of this technical solution is improved by 3Hz, but the mass of the non-driven axle will be increased; in other technical solutions, a rectangular square tube is added to the middle section of the non-driven axle to improve the mode of the non-driven axle. Compared with the non-driven axle with a tubular beam structure with a constant cross-section, the mode of this technical solution is improved by 11Hz, the mass of the non-driven axle is increased significantly, and the sudden change in cross-section will cause the durability of the structure to decrease and increase the risk of fatigue cracking.

[0037] like Figure 3-Figure 6 As shown, the difference from the related art is: 1. By increasing the size of the middle section 1 in the front-to-back direction, the modal frequency of the non-driven axle 100 in the front-to-back direction is increased to suppress the vibration type. For example, the front-to-back modal of the non-driven axle 100 after strengthening is increased from 125Hz to 138Hz, an increase of 13Hz; the results of the CAE wheel center force road noise simulation show that the peak value at 95Hz causing the road noise in this application is reduced by 5dB; in the actual vehicle test, the peak value of the road noise at 95Hz is reduced by 7dB. 2. The transition between the middle section 1 and the installation section 2 is through the gradient section 10, which reduces the stress concentration area of ​​the non-driven axle 100 and reduces the risk of fatigue durability cracking.

[0038] In addition, the dimensions of the mounting section 2 in the front-to-rear direction may not be changed, thereby maintaining the original design dimensions. After the mounting section 2 is installed and connected to the middle section 1, the non-driven axle 100 can be connected to other structures of the vehicle through the mounting section 2 without redesigning or changing the dimensions of the peripheral components of the non-driven axle 100, thereby reducing the cost of design changes.

[0039] It should be further explained that in the present application, after the non-driven axle 100 is optimized in design, the mass of the non-driven axle 100 can be consistent with the mass of the non-driven axle with increased wall thickness in the related art, but the modal of the technical solution of the present application is increased by 13Hz, and the optimization effect of the present application is better; compared with the technical solution of adding rectangular square tubes, under the condition of similar modal improvement effect caused by structural optimization, the mass change of the present application is smaller and the mass is lighter.

[0040] According to the non-driven axle 100 of the embodiment of the utility model, the non-driven axle 100 increases the size of the middle section 1 in the front-to-back direction, thereby increasing the modal frequency of the non-driven axle 100 in the front-to-back direction, suppressing the vibration type, and effectively alleviating the modal resonance between the non-driven axle 100 and the body sound cavity during the driving of some models of vehicles, and effectively reducing the noise value inside the vehicle. At the same time, the part where the size of the middle section 1 in the front-to-back direction becomes larger is transitioned through the gradient section 10, reducing the stress concentration area of ​​the non-driven axle 100 and reducing the risk of fatigue and durability cracking. In addition, the non-driven axle 100 can be connected to other structures of the vehicle through the mounting section 2 without redesigning or changing the size of the peripheral components of the non-driven axle 100, reducing the cost of design changes, and the quality change range is small, which has little impact on the weight of the whole vehicle.

[0041] like Figure 1 and Figure 2 As shown, in some embodiments, the middle section 1 further includes a first wide section 11. In the length direction, two gradient sections 10 are connected to both ends of the first wide section 11, and the front-to-back dimension of each gradient section 10 gradually increases in the direction toward the first wide section 11. The first wide section 11 of the middle section 1 is larger than the mounting section 2, and the dimension of the gradient section 10 in the front-to-back direction gradually changes from the dimension of the first wide section 11 in the front-to-back direction to the same dimension as the mounting section 2 in the front-to-back direction, thereby reducing the stress concentration area of ​​the non-drive axle 100 and reducing the risk of fatigue durability cracking.

[0042] In other embodiments not shown in the figures, the middle section 1 of the non-driven axle 100 does not have the first wide section 11, the middle section 1 protrudes from the mounting section 12 in the front-to-back direction, and the transition section 10 can be constructed in an elliptical shape, an arc shape, an olive shape, a hyperbola shape, etc.

[0043] like Figure 1 and Figure 2As shown, in some embodiments, the middle section 1 also includes two second wide sections 12, and the two second wide sections 12 are arranged corresponding to the two gradient sections 10, each second wide section 12 is connected between the gradient section 10 and the mounting section 2, and the cross-sectional shape and size of the second wide section 12 and the corresponding mounting section 2 are equal. In the length direction of the non-driven axle 100, a mounting section 2, a second wide section 12, a gradient section 10, a first wide section 11, another gradient section 10, another second wide section 12 and another mounting section 2 are arranged in sequence. When the middle section 1 is connected to the mounting section 2, by setting the second wide section 12, the operating space can be increased and the quality of the non-driven axle 100 can be improved. At the same time, the second wide section 12 has the same cross-sectional shape and size as the mounting section 2, which can reduce cross-sectional mutations and reduce the risk of fatigue durability cracking.

[0044] like Figure 1 and Figure 2 As shown, in some embodiments, the front-to-back dimensions of the first wide section 11 are equal at all locations in the length direction. That is to say, in the length direction, the front-to-back dimensions of the first wide section 11 remain unchanged, which can reduce cross-sectional mutations and reduce the risk of fatigue durability cracking. At the same time, the front-to-back dimensions of the first wide section 11 are greater than the front-to-back dimensions of the mounting section 2, thereby greatly improving the mode of the non-driven axle 100 in the front-to-back direction, thereby suppressing the vibration mode of the non-driven axle 100 in the front-to-back direction during driving, avoiding the non-driven axle 100 and the vehicle body acoustic cavity modal resonance, and reducing the roaring noise inside the vehicle when the vehicle is driving on uneven roads.

[0045] like Figure 1 and Figure 2 As shown, in some embodiments, the gradient section 10 is connected to the first wide section 11 through an arc transition, and the gradient section 10 is connected to the second wide section 12 through an arc transition. While achieving the front-to-back direction reinforcement of the non-drive axle 100, the original design size of the installation section 2 is maintained, and different cross sections are connected through arc transition. The arc is a curve with a relatively large radius and a long transition section, which can provide a more gentle transition effect, reduce stress concentration, and reduce the possibility of vibration, fatigue and damage caused by sudden changes in cross sections.

[0046] like Figure 1 and Figure 2 As shown, in some embodiments, the non-driven axle 100 is a tube, that is, the thickness can be reduced at the first wide section 11, thereby improving the modality of the non-driven axle 100 and reducing the mass of the rear axle.

[0047] like Figure 1 and Figure 2As shown, in some embodiments, the middle section 1 includes two half shells, and the two half shells are connected and arranged in a butt joint along the front-back direction. The middle section 1 is formed by splicing the two half shells, which is simple to manufacture and easy to produce, reducing the difficulty of processing technology and production.

[0048] like Figure 1 and Figure 2 As shown, in some embodiments, the two half shells are connected by welding, and the middle section 1 and the mounting section 2 are connected by welding. The welding connection effect is stable and the connection is more flexible.

[0049] like Figure 1 and Figure 2 As shown, in some embodiments, the height of the non-driven axle 100 at all locations in the length direction is equal, and the non-driven axle 100 only changes the mode in the front-to-back direction, and its height remains unchanged. While increasing the mode, the volume increase of the non-driven axle 100 is reduced, ensuring that the appearance of the non-driven axle 100 is smooth and beautiful.

[0050] like Figure 1 and Figure 2 As shown, for example, the two half shells are of front-to-back symmetrical structure, and the half shells are welded to each other and then connected to the mounting section 2 .

[0051] The vehicle according to the embodiment of the utility model comprises a vehicle body, two shock absorbing structures, two wheels and a non-driven axle 100 according to the embodiment of the utility model. The non-driven axle 100 is located under the vehicle body, and the two shock absorbing structures are respectively located on the two mounting sections 2 of the non-driven axle 100 and connected to the vehicle body; each wheel structure has a wheel fixing bracket, and the wheel fixing bracket is fixedly connected to the mounting section 2. For example, the shock absorbing structure can be a leaf spring installed on the mounting section 2 of the non-driven axle 100, and the mounting section 2 is provided with a leaf spring mounting bracket, and the leaf spring mounting bracket fixes the leaf spring to the mounting section 2 through a U-shaped bolt, and the leaf spring is connected to the vehicle body through the front and rear hanging ears on the leaf spring.

[0052] According to the vehicle implemented in the utility model, by setting the above-mentioned non-driven axle 100, while achieving the front-to-back direction reinforcement of the non-driven axle 100, the design size of the installation section 2 is maintained, so that the design state of the wheel fixing bracket, leaf spring mounting bracket, shock absorber mounting bracket, etc. connected to the mounting section 2 is free from change, and the design change cost is reduced while strengthening the non-driven axle 100. At the same time, according to the non-driven axle 100 of the embodiment of the utility model, the non-driven axle 100 increases the size of the middle section 1 in the front-to-back direction, thereby increasing the modal frequency of the non-driven axle 100 in the front-to-back direction, suppressing the vibration type, and effectively alleviating the modal resonance between the non-driven axle 100 and the body sound cavity during the driving of some models of vehicles, and effectively reducing the noise value inside the vehicle. At the same time, the part where the front-to-back direction size of the middle section 1 becomes larger is transitioned through the gradual section 10, reducing the stress concentration area of ​​the non-driven axle 100 and reducing the risk of fatigue durability cracking. In addition, the non-driven axle 100 can be connected to other structures of the vehicle through the mounting section 2 without redesigning or changing the size of the peripheral components of the non-driven axle 100, thereby reducing the cost of design changes, reducing the range of mass changes, and having little impact on the weight of the entire vehicle.

[0053] Other components and operations of the vehicle according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here. In the description of the utility model, "first feature" and "second feature" may include one or more of the features. Among them, the up-down direction, left-right direction and front-back direction are based on the up-down direction, left-right direction and front-back direction shown in the figure.

[0054] In the description of the present utility model, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature "above", "above" and "above" a second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A non-driven axle, characterized in that: include: A middle section and mounting sections connected to both ends of the middle section in the length direction, wherein the front-to-back dimension of the mounting section is smaller than the front-to-back dimension of the middle section, and the middle section includes two gradient sections; The two gradient sections are in a direction toward each other, and the dimension of each gradient section in the front-to-rear direction gradually increases.

2. The non-driven axle according to claim 1, characterized in that: The middle section also includes: The first wide section, the two gradient sections are connected at both ends of the first wide section in the length direction, and the front-to-back dimension of each gradient section gradually increases in the direction toward the first wide section.

3. The non-driven axle according to claim 2, characterized in that: The middle section also includes: two second wide sections, the two second wide sections are arranged corresponding to the two gradient sections, each second wide section is connected between the gradient section and the installation section, and the second wide section has the same cross-sectional shape and size as the corresponding installation section.

4. The non-driven axle according to claim 2, characterized in that: The dimensions of the first wide section in the front-to-back direction are equal at all locations along its length.

5. The non-driven axle according to claim 3, characterized in that: The gradient section, the first wide section, and the second wide section are all connected by arc transition.

6. The non-driven axle according to any one of claims 1 to 5, characterized in that: The non-driving axle is a tube body.

7. The non-driven axle according to claim 6, characterized in that: The middle section comprises two half shells, and the two half shells are butt-jointed along the front-rear direction.

8. The non-driven axle according to claim 7, characterized in that: The two half shells are connected by welding, and the middle section and the mounting section are connected by welding.

9. The non-driven axle according to any one of claims 1 to 5, characterized in that: The height of the non-driving axle is equal at all locations in the length direction.

10. A vehicle, characterized in that: include: Car body; The non-driven axle according to any one of claims 1 to 9, wherein the non-driven axle is located below the vehicle body; Two shock absorbing structures, the two shock absorbing structures are respectively located on the two mounting sections of the non-driving axle and connected to the vehicle body; Two wheel structures, each of which has a wheel fixing bracket, and the wheel fixing bracket is fixedly connected to the mounting section.

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