CN116164892A - Oil leakage testing device and method for drive axle assembly - Google Patents

Abstract

The invention relates to an oil leakage testing device of a drive axle assembly, which comprises a supporting component, a torque applying component and a stress simulating component, wherein an output axle in the drive axle assembly is rotationally connected with the supporting component around an axis parallel to a second direction and slides relative to the supporting component along the second direction, the torque applying component is connected with an input axle in the drive axle assembly so as to drive the input axle to rotate around the axis parallel to a first direction, the stress simulating component comprises at least one actuator arranged on a drive axle shell, the actuator is configured to provide preset simulating force for the drive axle shell along the longitudinal direction of the actuator, and the first direction and the second direction are mutually perpendicular.

Description

An oil leakage testing device and method for a drive axle assembly

technical field

The invention relates to the technical field of drive axle assembly detection, in particular to an oil leakage testing device and method for a drive axle assembly.

Background technique

The chassis of the vehicle is equipped with a drive axle assembly. After the assembly of the drive axle assembly is completed, its airtightness usually needs to be tested to check whether the functions are normal. If the final drive and the axle housing in the drive axle assembly are combined If there is oil leakage between the surfaces, it will accelerate the loss of each component, which is not conducive to the long-term safe operation of the vehicle.

In the related art, the drive axle assembly is usually submerged in water to observe whether there are air bubbles to detect whether the drive axle assembly is leaking oil. However, after using the traditional detection method to detect the oil leakage of the drive axle assembly, A large amount of moisture will remain on the drive axle assembly, resulting in cumbersome subsequent cleaning operations.

Contents of the invention

Based on this, it is necessary to provide an oil leakage testing device and method for a drive axle assembly for the problem that it is difficult to effectively detect the oil leakage of the drive axle assembly.

According to one aspect of the present application, an oil leakage test device for a drive axle assembly is provided, the drive axle assembly includes a drive axle housing and an input shaft rotatably arranged in the drive axle housing around an axis parallel to the first direction , the output wheel shaft that is arranged on the drive axle housing to rotate around the axial direction parallel to the second direction, the oil leakage test device of the drive axle assembly includes a support component, a torque application component and a force simulation component, wherein the output wheel shaft rotates around a parallel The axis in the second direction is rotatably connected to the support assembly _, and slides relative to the support assembly along the second direction; the torque application assembly is connected to the input shaft to drive the input shaft to rotate around the axis parallel to the first direction; the force simulation assembly includes a device At least one actuator on the drive axle housing, wherein the actuator is configured to provide the drive axle housing with a preset simulated force along the longitudinal direction of the actuator, the first direction and the second direction perpendicular to each other.

In one of the embodiments, at least one actuator includes a first linear actuator extending along a first direction and a second linear actuator extending along a third direction, wherein the first direction, the second direction and the second Three directions are perpendicular to each other.

In one of the embodiments, at least one actuator includes a plurality of first linear actuators arranged at intervals in the drive axle housing along the second direction, and a plurality of second linear actuators arranged at intervals in the drive axle housing along the second direction. linear actuator _.

In one embodiment, the drive axle assembly further includes a speed reducer disposed in the drive axle housing, and the end of the input shaft away from the torque applying assembly is connected to the output wheel shaft through the speed reducer.

In one of the embodiments, the drive axle assembly also includes a joint provided on the drive axle housing, one end of the speed reducer connected to the input shaft is rotatably connected to the joint, and the oil leakage test device also includes a camera, and the focus of the camera is The focal point coincides with the junction.

In one of the embodiments, the torque application assembly includes a bearing seat, a moment arm shaft and a third linear actuator, the bearing seat includes a first bearing seat and a second bearing seat oppositely arranged along a first direction, and the moment arm shaft is arranged along the first direction. One direction passes through the first bearing seat and the second bearing seat, one end of the arm shaft is connected to the input shaft, and the third linear actuator is connected to the arm shaft, and is used to drive the arm shaft to rotate parallel to the first direction axis rotation.

In one embodiment, the support assembly includes a bracket and a rotating plate, the rotating plate is connected to the bracket in rotation around an axis in the second direction, and the output wheel shaft passes through the rotating plate along the second direction.

According to another aspect of the present application, an oil leakage test method of a drive axle assembly is provided. According to the method for testing the oil leakage test device of the above drive axle assembly, the oil leakage test method includes: Apply a preset simulation force on the body and run for a preset time; if oil leakage occurs in the drive axle assembly, stop the test and indicate that the drive axle assembly is in a state of unqualified sealing; if no oil is observed when the preset time is reached traces, it indicates that the drive axle assembly is in a qualified state of sealing.

In one of the embodiments, a preset simulated force is applied on the drive axle housing, and the operation is performed for a preset time, which specifically includes collecting road spectrum data, analyzing and calculating the load at each position according to the road spectrum data; A preset simulated force corresponding to the load is applied to the body.

In one of the embodiments, the drive axle assembly further includes a speed reducer arranged in the drive axle housing, and the end of the input shaft away from the torque applying assembly is connected to the output wheel shaft through the speed reducer; a preset simulated force is applied to the drive axle housing , before running for a preset time, the oil leakage test method also includes pre-tightening the bolt fasteners at the connection between the drive axle housing and the reducer according to the minimum pre-tightening force.

In the technical solution of the present application, the force simulation component in the drive axle assembly oil leakage test device is used to simulate the force condition of the drive axle assembly during use. The force simulation component includes a plurality of actuators, which can provide The preset simulated force along the longitudinal direction of the actuator can effectively detect whether there is oil leakage or oil leakage risk between the drive axle housing and the reducer or other components in the drive axle assembly.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the oil leakage testing device of the drive axle assembly of an embodiment of the present application;

2 is a schematic structural view of a torque applying assembly according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a support assembly according to an embodiment of the present application;

FIG. 4 is a flowchart of an oil leakage detection method for a drive axle assembly according to an embodiment of the present application.

Reference signs:

The oil leakage test device 100 of the drive axle assembly;

Support assembly 11; bracket 111; rotating plate 112, transition plate 113; first splint 114; second splint 115;

Torque application assembly 12; first bearing seat 121; second bearing seat 122; moment arm shaft 123; third linear actuator 124;

The force simulation component 13; the first linear actuator 131; the second linear actuator 132;

camera 14;

Drive axle assembly 200; drive axle housing 21; input shaft 22; output wheel shaft 23; reducer 24;

The first direction F ₁ ; the second direction F ₂ ; the third direction F ₃ ;

Preset time T.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiments.

Usually, the drive axle assembly 200 may not have oil leakage in the initial stage after the assembly is completed, but oil leakage occurs after a period of use. The use history has an important influence on it. Traditional detection methods This makes it inconvenient to remove a large amount of residual moisture on the drive axle assembly 200 after the test. On the other hand, the traditional detection method can only detect whether there is oil leakage in the initial stage after the drive axle assembly 200 is assembled, and cannot detect potential leaks. effective detection of oil spill risks.

Based on this, it is necessary to provide an oil leakage testing device and method for a drive axle assembly for the problem that the oil leakage phenomenon or risk of the drive axle assembly is difficult to be effectively detected.

Referring to Fig. 1, Fig. 1 has shown the overall structure schematic diagram of the oil leakage test device 100 of the drive axle assembly 200 in an embodiment of the present invention, and drive axle assembly 200 comprises drive axle housing 21 and is parallel to the first direction The axis of _F1 is rotatably arranged on the input shaft 22 in the drive axle housing 21, and the output wheel shaft 23 is rotatably arranged on the drive axle housing 21 around the axial direction parallel to the second direction _F2 , and the drive axle assembly 200 The oil leakage testing device 100 includes a support assembly 11, a torque application assembly 12 and a force simulation assembly 13, wherein the output shaft 23 is connected to the support assembly 11 in rotation around an axis parallel to the second direction _F2 , and rotates along the second direction _F2 Sliding relative to the support assembly 11, the torque application assembly 12 is connected to the input shaft 22 to drive the input shaft 22 to rotate around an axis parallel to the first direction _F1 , and the force simulation assembly 13 includes at least one The actuator, wherein the actuator is configured to provide the transaxle housing 21 with a preset simulated force along the longitudinal direction of the actuator, the first direction _F1 and the second direction _F2 are perpendicular to each other.

It can be understood that the present application uses the force simulation component 13 in the oil leakage test device 100 of the drive axle assembly 200 to simulate the force condition of the drive axle assembly 200 during use. The force simulation component 13 includes a The multiple actuators on the actuator can provide preset simulated forces along the longitudinal direction of the actuator, thereby fully simulating the actual deformation of the drive axle assembly 200 during use, and then effectively detecting the drive axle Whether there is oil leakage phenomenon or risk of oil leakage between the drive axle housing 21 and the reducer 24 or other components in the assembly 200 .

For example, in some embodiments, at least one actuator includes a first linear actuator 131 extending along a first direction _F1 and a second linear actuator 132 extending along a third direction _F3 , wherein the first direction F ₁ , the second direction F ₂ and the third direction F ₃ are perpendicular to each other. In this way, through the vertical arrangement of the first linear actuator 131 and the second linear actuator 132, it is beneficial to synthesize simulated forces in various directions and sizes in this plane, thereby fully simulating the vehicle driving on different road conditions. The complex alternating force on the driving axle housing 21 and the deformation of the driving axle housing 21 under the alternating force.

Further, at least one actuator includes a plurality of first linear actuators 131 arranged at intervals along the second direction F2 on the drive axle housing ₂₁ , and a plurality of first linear actuators 131 arranged at intervals on the drive axle housing ₂₁ along the second direction F2. A second linear actuator 132, that is to say, the present application is equipped with a plurality of first linear actuators 131 and a plurality of second linear actuators 132 at different positions on the transaxle housing 21, simulating The stress status of each position of the drive axle assembly 200 in actual operation can further improve the simulation effect of the oil leakage detection device 100 of the drive axle assembly 200 on real working conditions.

In some embodiments, it should be understood that the drive axle assembly 200 further includes a reducer 24 disposed in the drive axle housing 21 , and the end of the input shaft 22 away from the torque applying assembly 12 is connected to the output wheel shaft 23 through the reducer 24 . In this way, the rotational motion of the input shaft 22 can be converted into the rotational motion of the output shaft 23 through the speed reducer 24, and the transmission ratio can be changed through different gear ratios of the internal gear sets of the speed reducer 24, thereby controlling the speed of the output shaft 23.

Optionally, the input shaft 22, the output shaft 23 and the speed reducer 24 can be meshed in the form of helical gears, so as to make the transmission process more stable and reduce the noise during the oil leakage test.

In some embodiments, the drive axle assembly 200 also includes a joint provided on the drive axle housing 21, one end of the reducer 23 connected to the input shaft 22 is rotatably connected to the joint, and the oil leakage of the drive axle assembly 200 The testing device 100 also includes a camera whose focusing point coincides with the joint. In this way, when the oil leakage detection experiment is in progress, if oil stains appear between the drive axle housing 21 and the reducer 24, the camera can clearly capture the relevant images, which is convenient for the experimenters to record the experiment data.

As an implementation, specifically the structural schematic diagram of the torque application assembly 12 shown in FIG. The first bearing seat 121 and the second bearing seat 122 that are arranged opposite to _F1 , the arm shaft 123 is passed through the first bearing seat 121 and the second bearing seat 122 along the first direction _F1 , and one end of the arm shaft 123 is connected to The input shaft 22 and the third linear actuator 124 are connected to the arm shaft 123 for driving the arm shaft 123 to rotate around an axis parallel to the first direction F ₁ . Here, the first bearing seat 121 and the second bearing seat 122 are fixed on the ground, the moment arm shaft 123 is connected with the third linear actuator 124 through the tooling, and the first bearing seat 121 and the second bearing seat 122 can eliminate the third linear actuator. The actuator 124 applies the additional bending moment brought by the load, so as to convert the force load into a torque load, and drive the arm shaft 123 to rotate.

3 is a schematic structural view of a support assembly 11 according to an embodiment of the present application. The support assembly 11 includes a bracket 111 and a rotating plate 112. The rotating plate 112 is rotatably connected to the bracket 111 around the axis of the second direction F2, and the output wheel shaft 23 is along the axis of the second direction _F2 . The two directions F ₂ pass through the rotating plate 112 .

It is worth noting that, during the experimental detection process, it mainly involves the coupling of the torsion and sliding motions of the two hub ends of the output shaft 23. Therefore, it is necessary to eliminate the motion interference of the hub ends due to the interaction of various motion forms to Meet the requirements of the testing experiment. The support assembly 11 provided by the present application includes a bracket 111 fixed on the ground and a rotating plate 112 connected to the bracket 111 rotatably around the axis of the second direction F ₂ , and the output wheel shaft 23 passes through and is fixed on the rotating plate along the second direction F ₂ 112, so that, on the one hand, the output wheel shaft 23 can move relative to the bracket 111 along the second direction _F2 , and on the other hand, the output wheel shaft 23 can also rotate around the axis of the second direction _F2 with the rotating plate 112 relative to the bracket 111 , so as to resolve the movement interference of the hub end and provide technical support for the experimental detection.

Further, the support assembly 11 also includes a transition plate 113 connected to the rotating plate 112 along the second direction _F2 , and the transition plate 113 is connected to both ends of the output shaft 23, and the transition plate 113 is provided with openings of different sizes. Thus, different types of drive axle assemblies 200 are adapted. The support assembly 11 also includes a first clamping plate 114 and a second clamping plate 115 connected to the bracket 111 by bolts along the second direction _F2 , and the rotating plate 112 is sandwiched between the first clamping plate 114 and the second clamping plate 115, so that the rotating plate The rotary motion of 112 is more stable.

According to another aspect of the present application, a method for testing oil leakage of the drive axle assembly 200 is provided, and FIG. 4 is a flow chart of the method for detecting oil leakage of the drive axle assembly according to an embodiment of the present application.

The method for testing according to the oil leakage test device 100 of the drive axle assembly 200 includes: applying a preset simulation force on the drive axle housing 21 and running for a preset time T; if there is oil leakage in the drive axle assembly 200, Then the test is stopped, and it indicates that the drive axle assembly 200 is in a sealed unqualified state; if no oil stains are observed when the preset time T is reached, it indicates that the drive axle assembly 200 is in a sealed qualified state.

It can be understood that what this application provides is a durability test method, fully considering the influence of the service history on the test results, by applying a preset simulated force on the drive axle housing 21 and running for a preset time T, so as to assess Whether there is oil leakage phenomenon or risk of oil leakage on the joint surface of drive axle housing 21 and reducer 24 under the specified load history.

In particular, it is pointed out that the drive axle assembly 200 does not have the phenomenon of oil leakage at the joint surface at the beginning, but often occurs after a period of use, and the time factor plays a great role in it. In some other methods, it is used to measure the amount of misalignment and clearance under the standard installation state, and compare the characteristic value of the sealant used on the joint surface to judge whether the degree of deformation of the joint surface meets the requirements of the sealant. Further predicting the reliability of the seal, this method generally can only detect whether there is oil leakage in the current drive axle assembly 200 . In this application, the preset time T is run under the preset simulation force, and the deformation degree of the drive axle assembly 200 is iterated under the effect of the time factor, so as to be closer to the real working conditions and effectively eliminate the potential leakage of the drive axle assembly 200. Oil risks are tested.

Further, a preset simulated force is applied on the drive axle housing 21, and the run is run for a preset time T, which specifically includes: collecting road spectrum data, analyzing and calculating the load at each position according to the road spectrum data; according to the load at each position, driving A preset simulated force corresponding to the load is applied to the axle housing 21 . It should be noted that this experimental method adopts the test load spectrum technology. The load spectrum samples are derived from the user's road spectrum to fit the actual use of the user. And analyze and calculate the test load spectrum of the drive axle assembly 200 at each position and the phase relationship of each load according to the load spectrum strengthening principle, then install the drive axle assembly 200 on the oil leakage test device 100, set up the camera and focus The focus is adjusted on the joint surface of the drive axle housing 21 and the reducer 24, and finally the loads at various positions are loaded by a plurality of first linear actuators 131 and a plurality of second linear actuators 132, forming a variable size and direction A variety of preset simulation forces.

In some embodiments, as a preferred embodiment, the drive axle assembly 200 further includes a speed reducer 24 arranged in the drive axle housing 21, and the end of the input shaft 22 away from the torque applying assembly 12 passes through the speed reducer 24 and the output The wheel shaft 23 is connected; a preset simulation force is applied on the drive axle housing 21, and before running for a preset time T, the oil leakage test method also includes: according to the minimum pre-tightening force on the joint of the drive axle housing 21 and the speed reducer 24 Bolt fasteners are pre-tightened. It can be understood that at this time, there is the greatest risk of oil leakage at the joint surface. If there is no oil stain in the detection test under this working condition, it means that the drive frame assembly 200 is well sealed and the product quality is reliable. Therefore, pre-tightening the connecting bolts according to the minimum pre-tightening force and adding a specified amount of lubricating oil can provide sufficient guarantee for the reliability of the test results.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. The utility model provides an oil leak testing arrangement of transaxle assembly, its characterized in that, the transaxle assembly includes the transaxle casing and locates rotationally around the axis that is on a parallel with the first direction the input shaft in the transaxle casing, locates rotationally around the axial that is on a parallel with the second direction the output shaft of transaxle casing, the oil leak testing arrangement of transaxle assembly includes:

a support assembly, the output axle being rotatably connected to the support assembly about an axis parallel to the second direction _， And sliding relative to the support assembly in the second direction;

a torque applying assembly coupled to the input shaft to drive rotation of the input shaft about an axis parallel to the first direction;

the stress simulation assembly comprises at least one actuator arranged on the drive axle shell;

wherein the actuator is configured to provide a predetermined simulated force to the transaxle housing in a longitudinal direction of the actuator;

the first direction and the second direction are perpendicular to each other.

2. The device for testing for oil leakage of a drive axle assembly according to claim 1, wherein said at least one of said actuators comprises a first linear actuator extending in said first direction and a second linear actuator extending in a third direction;

the first direction, the second direction and the third direction are perpendicular to each other.

3. The device for testing for oil leakage of a drive axle assembly according to claim 2, wherein said at least one of said actuators comprises a plurality of said first linear actuators disposed in said drive axle housing at intervals along said second direction, and a plurality of said second linear actuators disposed in said drive axle housing at intervals along said second direction.

4. A device for testing a transaxle assembly for oil leakage according to any one of claims 1 to 3, wherein the transaxle assembly further comprises a speed reducer disposed within the transaxle housing;

one end of the input shaft, which is far away from the torque application assembly, is connected with the output wheel shaft through the speed reducer.

5. The oil leakage testing device of a drive axle assembly according to claim 4, further comprising a joint provided on the drive axle housing, wherein one end of the decelerator connected to the input shaft is rotatably connected to the joint;

the oil leakage testing device of the drive axle assembly further comprises a camera, and the focusing focus of the camera coincides with the joint part.

6. A drive axle assembly oil leak testing apparatus in accordance with any one of claims 1 to 3, wherein the torque applying assembly comprises:

the bearing seat comprises a first bearing seat and a second bearing seat which are oppositely arranged along the first direction;

a force arm shaft penetrating the first bearing seat and the second bearing seat along the first direction, wherein one end of the force arm shaft is connected with the input shaft; and

and the third linear actuator is connected with the force arm shaft and is used for driving the force arm shaft to rotate around an axis parallel to the first direction.

7. A drive axle assembly oil leak testing apparatus in accordance with any one of claims 1 to 3, wherein the support assembly comprises:

a bracket;

the rotating plate is rotatably connected to the bracket around the axis of the second direction, and the output wheel shaft penetrates through the rotating plate along the second direction.

8. A method of testing a drive axle assembly for oil leakage, the method comprising:

applying the preset simulation force on the drive axle shell, and running for a preset time;

if the driving axle assembly has oil leakage, stopping the test and indicating that the driving axle assembly is in a state of unqualified sealing;

and if no oil stain is observed when the preset time is reached, indicating that the drive axle assembly is in a sealed qualified state.

9. The method for testing the oil leakage of the drive axle assembly according to claim 8, wherein the applying the preset simulation force to the drive axle housing for a preset time comprises:

collecting road spectrum data, and analyzing and calculating the load of each position according to the road spectrum data;

and according to the load, applying the preset simulation force corresponding to the load on the drive axle housing.

10. The method of claim 8, further comprising a speed reducer disposed within the axle housing, wherein an end of the input shaft remote from the torque application assembly is coupled to the output axle via the speed reducer;

the oil leakage testing method further comprises the steps of applying the preset simulation force on the drive axle shell and before running for a preset time:

and pre-tightening the bolt fastener at the joint of the drive axle housing and the speed reducer according to the minimum pre-tightening force.

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