Multifunctional heavy support for driving bridge rack test

Abstract

The invention provides a multifunctional heavy support for driving bridge rack testing. The multifunctional heavy support comprises a base and a supporting platform located on the base, and the supporting platform is provided with an X-direction adjusting device used for X-direction adjustment, a Y-direction adjusting device used for Y-direction adjustment and a Z-direction adjusting device used for Z-direction adjustment. The Y-direction adjusting device is located at the upper end of the supporting platform, the Y-direction adjusting device comprises a fixing end and an adjusting end, the fixing end is used for fixing the drive axle, the adjusting end comprises a rotary supporting platform and a first lead screw machine, the first lead screw machine drives the drive axle to move in the Y direction through the rotary supporting platform, and the Y-direction adjusting device can be used for a support for driving axle testing. Most tested parts such as passenger vehicle and commercial vehicle drive axles can be covered. The problems that an existing tested piece support for rack testing is single in function, inconvenient to adjust and poor in expansion performance are solved.

Description

Technical Field

[0001] The present invention relates to a multifunctional heavy-duty support for drive axle bench testing, which is suitable for multi-directional adjustable heavy-duty support for drive axles, including but not limited to conventional drive axles, electric drive axles, vehicle chassis testing and other test pieces. It is widely used in two-motor benches, three-motor benches, four-motor benches, and five-motor benches for vehicle testing, powertrain testing, and gearbox testing. Background Art

[0002] With the rapid development of the automotive industry, new requirements are put forward for test benches. Modular design, multifunctionality and automation are the future development trends. Traditional drive axle supports have relatively simple functions and low automation. Most of them only have the ability to adjust the height, but not the other directions. Due to the large difference in specifications and sizes between drive axles of passenger cars and commercial vehicles, and the different installation and positioning sizes of drive axles equipped by equipment from different manufacturers, it is usually impossible to share a support, making the drive axle support not universally applicable. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention proposes a multifunctional heavy-duty support for drive axle bench testing, which can be used as a support for drive axle testing and can cover most of the test pieces such as passenger car and commercial vehicle drive axles. It solves the problem that the current support for the test piece for bench testing has a single function, is inconvenient to adjust, and has poor expansion performance.

[0004] To achieve the above object, the present invention provides the following technical solutions: A multifunctional heavy-duty support for a drive axle bench test comprises a base and a support platform located on the base, wherein the support platform is provided with an X-direction adjustment device for X-direction adjustment, a Y-direction adjustment device for Y-direction adjustment and a Z-direction adjustment device for Z-direction adjustment; the Y-direction adjustment device is located at the upper end of the support platform, the Y-direction adjustment device comprises a fixed end and an adjustment end, the fixed end is used to fix the drive axle, and the adjustment end comprises a rotating support platform and a first screw machine, and the first screw machine drives the Y-direction movement of the drive axle by rotating the support platform.

[0005] As a further solution of the present invention, the adjusting end also includes a combined base, a first fastener, a second fastener, an arc-shaped support limit block, and a screw machine nut. The rotating support platform is located in the combined base. The first fastener and the second fastener are used to lock the tilt angle. The arc-shaped support limit block is located on the rotating support platform for rotation limitation, and the screw machine nut is used to drive the rotation of the rotating support platform.

[0006] As a further solution of the present invention, the rotation support platform is provided with a fixing rod, and the screw machine nut drives the rotation of the rotation support platform through the fixing rod.

[0007] As a further solution of the present invention, the support platform includes a lifting support platform and a lifting adjustment platform; the lifting adjustment platform is driven by the Z-direction adjustment device to adjust the lifting adjustment platform on the lifting support platform in the Z-direction.

[0008] As a further solution of the present invention, the support platform includes four lifting support platforms and two lifting adjustment platforms, the lifting adjustment platforms are located on the two lifting support platforms, and the Y-axis adjustment device is located on the lifting adjustment platform.

[0009] As a further solution of the present invention, the Z-direction adjustment device includes a slide groove located on the lifting support platform, and an adjusting fixing nut. The Z-direction adjustment is performed on the slide groove by lifting the adjusting platform, and then fixed by adjusting the fixing nut.

[0010] As a further solution of the present invention, the X-axis adjustment device includes a second screw machine and a slide rail located on the base, and the second screw machine drives the support platform to move on the slide rail.

[0011] As a further solution of the present invention, the support platform is fixed in the T-slot of the base by T-nuts and bolts.

[0012] As a further solution of the present invention, a pressure plate is provided at the fixed end, and the pressure plate is used to fix the two ends of the drive axle.

[0013] The present invention has the following beneficial effects: 1. The support of the present invention is located on the iron bottom plate platform, which can be translated forward and backward as a whole to meet the fixed support of the tested part, and can also be raised and lowered to adjust the center height of the drive axle hub shaft system, and the distance between the support mounting plates on both sides can be adjusted to adapt to different drive axles. At the same time, it can also meet the road condition simulation test requirements such as uphill and downhill front and rear pitch angle adjustment of the drive axle, tilted road surface and left and right tilt of the body, etc. In the later stage, other modules can be added according to the test requirements to expand other functions.

[0014] 2. The X-axis adjustment, Y-axis adjustment, and Z-axis adjustment methods have been optimized, especially for the Y-axis adjustment, which can achieve precise positioning of the adjustment angle. For example, precise positioning of different angles can be achieved through different fasteners, and the amplitude of movement can be limited by setting arc-shaped support limit blocks.

[0015] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a stereoscopic diagram of a multifunctional heavy-duty support for drive axle bench testing mentioned in the present invention.

[0017] Figure 2It is a top view of a multifunctional heavy-duty support for driving axle bench testing mentioned in the present invention.

[0018] Figure 3 It is a structural schematic diagram of the Y-direction adjusting device mentioned in the present invention.

[0019] Figure 4 , Figure 5 It is a schematic diagram of the exploded view of the Y-direction adjusting device mentioned in the present invention.

[0020] Figure 6 , Figure 7 , Figure 8 It is a partial schematic diagram of the Y-direction adjusting device mentioned in the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further explained below in conjunction with the accompanying drawings and related knowledge, and described clearly and completely. Obviously, the described application is only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-Figure 8 As shown, the present invention provides a multifunctional heavy-duty support for testing a drive axle bench, including a base 1, a supporting platform located on the base 1, the supporting platform is provided with an X-direction adjustment device for X-direction adjustment, a Y-direction adjustment device for Y-direction adjustment and a Z-direction adjustment device for Z-direction adjustment; the Y-direction adjustment device is located at the upper end of the supporting platform, the Y-direction adjustment device includes a fixed end 2 and an adjustment end 3, the fixed end 2 is used to fix the drive axle 4, the adjustment end 3 includes a rotating supporting platform 5 and a first screw machine 6, the first screw machine 6 drives the Y-direction movement of the drive axle 4 by rotating the supporting platform 5.

[0023] In the present invention, the bench test of the tested part involves road condition testing, which needs to simulate the vehicle uphill and downhill working conditions. At this time, in addition to supporting and fixing, the drive axle needs to rotate along the Y axis to make it tilt to a certain test angle. The test support of the present invention realizes rotation along the Y axis. By accurately simulating this working condition on the bench, it can comprehensively and accurately test the various performance indicators of the drive axle in similar real scenes, such as its support stability, component force distribution, transmission efficiency, etc., so as to provide a strong basis for the optimization design, quality control and reliability evaluation of the drive axle. The vehicle body will produce a corresponding tilt due to the road slope. The drive axle is a key component of vehicle power transmission, and its angle will also change accordingly. Simulating this angle change in the bench test can put the drive axle in a stress state similar to the actual working condition, ensure the authenticity and validity of the test data, and then accurately evaluate the impact of the drive axle on the vehicle driving performance when going uphill and downhill; in order to realize the rotation of the drive axle along the Y axis to the specified test angle, the multifunctional heavy-duty support plays an important role. The support is equipped with a special angle adjustment mechanism, which allows the drive axle to rotate smoothly and accurately along the Y axis to a predetermined angle, completing the key step of simulating uphill and downhill working conditions.

[0024] The support of the present invention is located on the iron bottom plate platform, and can be translated forward and backward as a whole to meet the fixed support of the tested part, and can also be raised and lowered to adjust the center height of the drive axle hub shaft system, and can also adjust the distance between the support mounting plates on both sides to adapt to different drive axles. At the same time, it can also meet the road condition simulation test requirements such as uphill and downhill front and rear pitch angle adjustment of the drive axle, tilted road surface and left and right tilt of the body, and other modules can be added in the later stage according to the test requirements to expand other functions; In other words, the whole can be smoothly translated in the front-to-back direction. This feature greatly facilitates the installation and adjustment of the test drive axle bench. Whether in the initial positioning process or when the test piece needs to be slightly changed in position during the test, it can be easily achieved, greatly improving the efficiency and convenience of the test work; in the test of the drive axle, different test items often require specific shaft height settings to simulate the vehicle operation status under real road conditions. The support can achieve height adjustment in a large range through a precise lifting mechanism to ensure that the shaft height is accurately matched with the test requirements, laying a solid foundation for obtaining accurate test data; it can simulate the front and rear pitch angle changes of the drive axle when going up and down the slope, as well as the state of the body tilting left and right when driving on an inclined road. By precisely controlling these angles, various mechanical conditions in actual road driving can be reproduced in the bench test environment, making the test results more authentic and reliable. This is of great significance for the durability, stability and safety testing of the drive axle, and helps to discover potential problems in advance during the product development and quality control stages to avoid failures in actual use.

[0025] Reference Figure 2-Figure 8As shown, the adjustment end 3 also includes a combined base 7, a first fastener 8, a second fastener 9, an arc-shaped support limit block 10, and a screw machine nut 11. The rotation support platform 5 is located in the combined base 7. The first fastener 8 and the second fastener 9 are used to lock the tilt angle. The arc-shaped support limit block 10 is located on the rotation support platform 5 for limiting the rotation. The screw machine nut 11 is used to drive the rotation of the rotation support platform. The specific working process is: the movement of the screw machine nut 11 is driven by the first screw machine 6, thereby driving the movement of the rotation support platform 5. When it is adjusted to the position that needs to be adjusted, the first fastener 8 or the second fastener 9 passes through the combined base. The seat 7 is fixed to the rotating support platform 5, so as to complete the Y-axis adjustment, and the precise positioning of the adjustment angle can be realized. For example, precise positioning of different angles can be realized by different fasteners, and the amplitude of movement can be limited by setting an arc-shaped support limit block. It should be noted that the present invention only lists two fasteners, and precise fixation of multiple angles can be set as needed. Precise adjustment is required according to different test products, or precise setting is required according to different test products, which can save a lot of adjustment time and has higher rotation accuracy, thereby realizing a variety of simulation scenarios in the test, and greatly improving the accuracy and efficiency of the test.

[0026] Further preferably, the combined base 7 has five plates in total, which are connected by countersunk bolts, and the surface is milled with semicircular countersunk holes with angle division lines on the outside and long round holes; the rotating support platform is welded by the top support plate and the two semicircular support plates and cylindrical push rods below, and the outer side of the semicircular plate below has a 0 degree scale mark; the first screw machine 6 is fixed to the combined base 7 by bolts, and the flange-type bearing seat at the end of the screw is connected and fixed with the combined base 7 by bolts. The screw machine nut is I-shaped as a whole, with the inner hole threaded and the lower plane milled. When working, it slides on the upper surface of the bottom plate of the combined base 7. When the screw machine handwheel is rotated, this structure can ensure that the screw machine nut only moves along the direction of the screw and will not rotate. The 0 degree scale mark on the outer side of the semicircular plate below plays an important role in rotation operations and angle measurement. It can be used as a reference point to facilitate the determination of the starting angle of rotation or other parts with angle marks, thereby achieving precise angle control and positioning. When the hand wheel of the screw machine is rotated, due to the special structural design of the screw machine nut, which is in an I-shaped shape and has a flat surface at the bottom, this structure can ensure that the screw machine nut only moves along the direction of the screw and does not rotate. This is because the sliding fit between the plane and the upper surface of the bottom plate limits the rotational freedom of the nut, so that the rotational motion of the screw can be accurately converted into the linear motion of the nut, thereby achieving precise transmission and displacement control, meeting the needs of the entire system for component position adjustment and other aspects.

[0027] In the present invention, the handwheel is first removed during assembly, and the matching nut is adjusted to a suitable position (when the upper surface of the rotating support platform is parallel to the bottom of the combined base, the 0 degree scale line of the rotating support platform is at the scale center position of the combined base), the screw machine is installed on the combined base, and the remaining matching parts of the combined base are connected by bolts. After the assembly is completed, the rotating support platform is placed inside the combined base, the arc-shaped support limit block is fixed to the rotating support platform by bolts, the handwheel of the screw machine is installed, the screw machine is rotated, the tilt angle required for the test is adjusted, and the tilt angle is locked by the first fastener 8 and the second fastener 9.

[0028] In the present invention, the rotating support platform 5 is provided with a fixing rod 12, and the screw machine nut 11 drives the rotating support platform to rotate through the fixing rod 12, thereby achieving adjustment in the Y direction.

[0029] The support platform of the present invention includes a lifting support platform 13 and a lifting adjustment platform 14; the Z-direction adjustment device drives the lifting adjustment platform to be adjusted in the Z direction on the lifting support platform. Further preferably, the support platform includes four lifting support platforms and two lifting adjustment platforms, the lifting adjustment platforms are located on the two lifting support platforms, and the Y-direction adjustment device is located on the lifting adjustment platform; more preferably, the Z-direction adjustment device includes a slide groove 15 located on the lifting support platform, and an adjusting fixing nut, the Z-direction adjustment is performed on the slide groove by the lifting adjustment platform, and then fixed by adjusting the fixing nut.

[0030] The X-direction adjustment device of the present invention includes a second screw machine 16 and a slide rail 17 located on the base, and the second screw machine drives the support platform to move on the slide rail. The support platform is fixed in the T-slot of the base by T-nuts and bolts; a pressure plate 18 is provided at the fixed end, and the pressure plate is used to fix the two ends of the drive axle.

[0031] In the present invention, the support as a whole is fixed in the T-slot of the iron bottom plate by T-nuts and bolts, the power input end of the drive axle is connected to the input dynamometer through a retractable universal coupling, the dynamometer provides power input (the electric drive axle directly provides input power through the motor installed on the bridge housing), and the wheel hub ends on both sides are connected to the wheel side load dynamometer. When the drive axle is installed, it is connected and fixed by 8 bolts on both sides. Due to the different specifications of the tested parts, the bolt hole positions are also different, and the distance between the bolts on both sides also needs to be adjusted. When the bolt holes on the mounting surface of the rotating adjustment fixture along the Y direction are not compatible with the tested parts, 2 tooling adapter plates can be added for matching and transferring of the bolt holes. At the same time, 2 pressure plates are matched as tooling pressure plates. When the distance between the bolt holes on both sides changes, the third screw machine 21 is adjusted to match the spacing between the bolt holes on both sides of the tested parts. Before adjustment, the lifting platform leg fixing bolts are removed, and the handwheel of the third screw machine 21 is rotated. The screw machine pushes and pulls the lifting platform legs. The leg bottom plate is restrained and limited by the concave and convex matching of the self-lubricating graphite copper plate that matches it. The copper plate is fixed on the support bottom plate to ensure that the platform can only be moved and adjusted along the Y direction. After the legs are adjusted to the appropriate position, tighten the lifting platform leg bolts. When the tested parts are installed, the drive axle is fixed by the matching pressure plate and matching bolts on the top.

[0032] Usually, the load dynamometer and its transmission shaft system cannot move in the x and z directions, and can only be extended and retracted in the Y direction through the telescopic universal shaft. During installation, the wheel hub and the load dynamometer shaft system need to be aligned, and the position of the wheel hub in the x direction can be adjusted through the second screw machine 16. During the adjustment process, it is necessary to loosen the fixing bolts between the support base plate and the iron base plate in advance, fix the second screw machine 16 through the fixed support, rotate the screw machine handwheel, and the screw machine pushes and pulls the support base plate to adjust the position of the support base plate; loosen the Z-direction lifting support platform fixing bolts, and adjust the height of the wheel hubs on both sides through the fourth screw machine 22 and the fifth screw machine 23 respectively, so that they are coaxial with the load dynamometers on both sides. After the adjustment is completed, tighten the support base plate bolts and the lifting platform fixing bolts.

[0033] The bench test of the test piece involves road condition testing, which needs to simulate the vehicle's uphill and downhill conditions. At this time, in addition to being supported and fixed, the drive axle also needs to rotate along the Y axis to make it tilt to a certain test angle. To meet this working condition requirement, a fixing device that can be rotated and adjusted along the Y direction is added to the lifting platforms on both sides.

[0034] In the present invention, when the bench test of the test piece involves road condition testing and needs to simulate the vehicle uphill and downhill working conditions, the drive axle, in addition to the conventional support and fixing functions, needs to rotate along the Y axis to make it tilt to a certain test angle. In order to meet the requirements of this special working condition, fixing devices that can be adjusted along the Y direction are added to the lifting platforms on both sides. These fixing devices can effectively realize the angle adjustment of the drive axle under the simulated uphill and downhill working conditions, so that the drive axle is in a stress state similar to the actual road conditions, so as to more accurately test the various performance indicators of the drive axle under the working conditions. The entire drive axle bench test system can perform bench tests on drive axles of different specifications more comprehensively and accurately through a variety of ingenious installation and fixing methods, fine centering adjustment means and countermeasures for special working conditions, simulating the working conditions under various actual road conditions, and providing a strong basis for the performance evaluation and optimization of the drive axle.

[0035] The technical principle of the present invention is described above in combination with the specific embodiments, which are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments, and all technical solutions under the idea of ​​the present invention belong to the protection scope of the present invention. Those skilled in the art can think of other specific implementations of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A multifunctional heavy-duty support for drive axle bench testing, characterized in that: It includes a base and a supporting platform located on the base, wherein the supporting platform is provided with an X-direction adjusting device for X-direction adjustment, a Y-direction adjusting device for Y-direction adjustment and a Z-direction adjusting device for Z-direction adjustment; the Y-direction adjusting device is located at the upper end of the supporting platform, and the Y-direction adjusting device includes a fixed end and an adjusting end, the fixed end is used to fix the drive bridge, and the adjusting end includes a rotating supporting platform and a first screw machine, and the first screw machine drives the Y-direction movement of the drive bridge by rotating the supporting platform.

2. The multifunctional heavy-duty support for drive axle bench testing as claimed in claim 1, characterized in that: The adjustment end also includes a combined base, a first fastener, a second fastener, an arc-shaped support limit block, and a screw machine nut. The rotating support platform is located in the combined base. The first fastener and the second fastener are used to lock the tilt angle. The arc-shaped support limit block is located on the rotating support platform for rotation limitation, and the screw machine nut is used to drive the rotation of the rotating support platform.

3. The multifunctional heavy-duty support for driving axle bench testing as claimed in claim 2, characterized in that: The rotation support platform is provided with a fixing rod, and the lead screw machine nut drives the rotation of the rotation support platform through the fixing rod.

4. The multifunctional heavy-duty support for driving axle bench testing as claimed in claim 1, characterized in that: The support platform includes a lifting support platform and a lifting adjustment platform; the lifting adjustment platform is driven to adjust the Z direction on the lifting support platform through the Z direction adjustment device.

5. The multifunctional heavy-duty support for driving axle bench testing as claimed in claim 4, characterized in that: The support platform includes four lifting support platforms and two lifting adjustment platforms. The lifting adjustment platforms are located on the two lifting support platforms, and the Y-axis adjustment device is located on the lifting adjustment platforms.

6. The multifunctional heavy-duty support for driving axle bench testing as claimed in claim 4, characterized in that: The Z-direction adjustment device comprises a slide groove located on the lifting support platform and an adjustment fixing nut. The Z-direction adjustment is performed on the slide groove by lifting the adjustment platform, and then fixed by adjusting the fixing nut.

7. The multifunctional heavy-duty support for driving axle bench testing as claimed in claim 1, characterized in that: The X-axis adjustment device comprises a second screw machine and a slide rail located on the base, and the second screw machine drives the support platform to move on the slide rail.

8. The multifunctional heavy-duty support for driving axle bench testing as claimed in claim 1, characterized in that: The supporting platform is fixed in the T-slot of the base through T-nuts and bolts.

9. The multifunctional heavy-duty support for driving axle bench testing as claimed in claim 4, characterized in that: The fixed end is provided with a pressing plate, and the pressing plate is used to fix the two ends of the drive axle.

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