WO2020239063A1 - Road simulation test bench - Google Patents

Abstract

A road simulation test bench, which comprises a column supporting structure (10), a horizontal adjusting structure and a connecting plate (6), wherein the horizontal adjusting structure comprises an adjusting bracket (4), a linear guiding structure and a bearing plate (5), wherein the linear guiding structure is fixed onto the adjusting bracket (4), the linear guiding structure is used for supporting the bearing plate (5) and enabling the bearing plate (5) to move linearly, the first end of the adjusting bracket (4) is connected to the column supporting structure (10), and the connecting plate (6) is hinged to the lower side of the linear guiding structure. The road simulation test bench is stable in structure and flexible in size, and can adapt to road simulation test requirements of different types of chassis.

Description

Road simulation test bench Technical field

The invention relates to the technical field of road simulation tests, in particular to a road simulation test bench.

Background technique

In recent years, the development of my country's construction machinery has been advancing by leaps and bounds, product updates have become more frequent, and market competition has become more fierce. Therefore, construction machinery manufacturing companies need to shorten the development cycle, especially in the later stage of product research and development. It is necessary to formulate methods to accelerate product verification, namely Road simulation test technology. In order to shorten the product development cycle and reduce development costs, road simulation test methods have become the main means for product verification by major domestic and foreign vehicle and component companies. However, due to the large chassis size of construction machinery vehicles, and the large mass of the entire vehicle, such as mining trucks and agricultural harvesters, there are large differences in terms of vehicle quality, wheelbase and other parameters from ordinary passenger vehicles. Therefore, when the construction machinery is performing the vehicle road simulation bench test, the adjustable size of the road simulation test bench needs to be large enough, and at the same time the maximum load is large enough.

Although the existing road simulation test bench has a certain size adjustment ability, the adjustment range is limited. The maximum adjustment size of the wheelbase is generally small, and the load-bearing capacity is generally low, which cannot meet the test needs of large wheelbase and large tonnage of construction machinery vehicles. .

Summary of the invention

The purpose of the present invention is to provide a road simulation test bench with stable structure and flexible size, which is used to meet the needs of road simulation test of different types of chassis.

In order to achieve the above objective, the present invention provides the following solutions:

The invention discloses a road simulation test bench, which includes:

Column support structure;

A horizontal adjustment structure, the horizontal adjustment structure includes an adjustment bracket, a linear guide structure and a bearing plate, the linear guide structure is fixed on the adjustment bracket, the linear guide structure is used to support the bearing plate and make the bearing plate The board moves in a straight line, and the first end of the adjustment bracket is connected to the column support structure;

The connecting plate is hinged to the lower side of the linear guide structure.

Preferably, the column support structure includes a connecting frame, a vertical plate and two columns, the upper ends of the two columns are fixedly connected by the connecting frame, and the vertical plate is fixed to the end of the connecting frame, The first end of the adjusting bracket is connected to the vertical plate, and the bearing plate is located on the plane where the axes of the two uprights are located.

Preferably, the adjustment bracket is connected to the vertical plate through a vertical adjustment structure, the vertical adjustment structure includes a vertical guide rail and a sliding block, and the vertical guide rail is fixed to the vertical direction along the vertical direction. On the board, the sliding block is slidably arranged on the vertical guide rail, and the first end of the adjusting bracket is fixedly connected to the sliding block.

Preferably, the adjusting bracket has a Z-shaped structure, including a first horizontal part, a vertical part, and a second horizontal part. The first end of the second horizontal part is fixedly connected to the sliding block, and the second horizontal part The second end of the section is fixedly connected to the lower end of the vertical section, the upper end of the vertical section is fixedly connected to the first end of the first horizontal section, and the connecting plate is hingedly connected to the first horizontal section. Down side.

Preferably, the vertical plate and the horizontal adjustment structure are both two, and they are symmetrically distributed on both sides of the column support structure, and the horizontal adjustment structure includes a first horizontal adjustment structure and a second horizontal adjustment structure.

Preferably, the linear guide structure of the first level adjustment structure is a screw nut assembly, the screw nut assembly includes a screw and a nut, both ends of the screw are connected to the first On the adjustment bracket of the horizontal adjustment structure, the bearing plate of the first horizontal adjustment structure is fixedly connected with the nut.

Preferably, the linear guide structure of the second level adjustment structure is a linear bearing assembly, the linear bearing assembly includes an optical shaft and a linear bearing, and both ends of the optical shaft are connected to the second On the adjustment bracket of the horizontal adjustment structure, the bearing plate of the second horizontal adjustment structure is fixedly connected with the linear bearing.

Preferably, an end of the adjustment bracket away from the support structure of the column has a limit baffle, and the limit baffle is used to limit the displacement of the bearing plate.

Preferably, the carrying plate is in sliding contact with the adjusting bracket.

Preferably, the lower end of the column has a flange end surface, and the flange end surface is used for fixing to the ground by bolts.

Compared with the prior art, the present invention has achieved the following technical effects:

The invention adjusts the position of the load-bearing plate through the linear guide structure, so that the test bench can measure the maximum wheelbase of the vehicle to be greatly improved; the invention adopts a double-pillar structure to bear the loads generated during the simulation test of the wheels on both sides, so that they can offset each other , In order to improve the total load-bearing capacity of the road simulation test bench, effectively avoid the vibration head of the test bench from being damaged by excessive bending moment, so as to more fully meet the requirements of construction machinery related vehicles, especially large chassis and large tonnage vehicles. The requirements of road simulation test: The present invention leaves enough space for the chassis stroke of the construction machinery vehicle during the simulation test by designing the adjusting bracket as a Z-shaped structure, and at the same time significantly improves the maximum wheelbase and wheelbase of the measurable vehicle. It can meet the test requirements of large-chassis construction machinery; the present invention can perform wheelbase unidirectional adjustment, wheelbase unidirectional adjustment and wheelbase-wheelbase bidirectional adjustment for different vehicles; the present invention adopts pure mechanical mechanism, simple structure and low cost It is easy to assemble and has strong working reliability; all parts of the invention adopt standard parts, which have good interchangeability and easy maintenance.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, without creative work, other drawings can be obtained from these drawings.

Figure 1 is a schematic diagram of the overall structure of the road simulation test bench of the present invention;

Figure 2 is a schematic diagram of a partial structure of one side of the road simulation test bench of the present invention;

Figure 3 is a partial structural diagram of the other side of the road simulation test bench of the present invention;

Figure 4 is a schematic diagram of the overall structure of a road simulation test bench with only one level adjustment structure installed;

Figure 5 is a diagram of the force and moment of the adjustment bracket;

Description of Reference Signs: 1 optical axis; 2 linear bearing; 3 optical axis seat; 4 adjusting bracket; 5 bearing plate; 6 connecting plate; 7 sliding block; 8 vertical guide rail; 9 fixing seat; 10 column support structure; 10- 1 connecting frame; 10-2 column; 11 hinge; 12 bearing seat; 13 screw; 14 nut.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a road simulation test bench with stable structure and flexible size, which is used to meet the needs of road simulation test of different types of chassis.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIGS. 1-5, this embodiment provides a road simulation test bench, which includes a column support structure 10, a level adjustment structure and a connecting plate 6. Among them, the column support structure 10 is used to support the horizontal adjustment structure. The horizontal adjustment structure can change the lateral size to adapt to the simulation test needs of different chassis. The connecting plate 6 is used to contact the excitation structure and transfer the excitation to the horizontal adjustment structure to simulate The vibration of the chassis under different road conditions.

The horizontal adjustment structure includes an adjustment bracket 4, a linear guide structure and a bearing plate 5. The linear guide structure is fixed on the adjustment bracket 4. The linear guide structure is used to support the bearing plate 5 and move the bearing plate 5 along a straight line. The end is connected to the column support structure 10. There are many types of linear guide structures, and those skilled in the art can choose according to actual needs. The connecting plate 6 is hinged on the lower side of the linear guide structure, and can transmit vibrations in different directions.

When in use, the column support structure 10 is fixed on the ground or the base, the chassis of the test vehicle is fixed on the bearing plate 5, and then the excitation structure is activated so that the excitation structure transfers excitation to the connecting plate 6. The position of the load-bearing plate 5 can be adjusted according to the actual size of the chassis, so that the maximum wheelbase of the vehicle that can be measured by the test bench is greatly improved, which meets the test requirements of a large chassis. There are many ways to fix the column 10-2. The lower end of the column 10-2 of this embodiment has a flange end surface, and the flange end surface is used for fixing to the ground by bolts.

In order to improve the overall stability, the column support structure 10 of this embodiment includes a connecting frame 10-1, a vertical plate, and two columns 10-2. The upper ends of the two columns 10-2 are fixedly connected by the connecting frame 10-1. The direction plate is fixed to the end of the connecting frame 10-1, the first end of the adjusting bracket 4 is connected to the vertical plate, and the bearing plate 5 is located on the plane of the axes of the two uprights 10-2. The double-column structure is used to bear the force and moment caused by the extension of the lever arm. While increasing the load-bearing capacity of the test bench, it effectively avoids the vibration head of the test bench from being damaged due to excessive bending moments, so as to meet the project more comprehensively. Machinery-related vehicles, especially vehicles with large chassis and large tonnage, have requirements for road simulation tests.

In order to facilitate the adjustment of the height of the chassis, the adjustment bracket 4 of this embodiment is connected to the vertical plate through a vertical adjustment structure. The vertical adjustment structure includes a vertical rail 8 and a slider 7. The vertical rail 8 is fixed in the vertical direction. The seat 9 is fixed on the vertical plate, the sliding block 7 is slidably arranged on the vertical guide rail 8, and the first end of the adjusting bracket 4 is fixedly connected with the sliding block 7. By changing the position of the slider 7 on the vertical rail 8, the height of the chassis can be adjusted.

In order to avoid collisions between the chassis and the column support structure 10, the adjusting bracket 4 of this embodiment is a Z-shaped structure, including a first horizontal portion, a vertical portion, and a second horizontal portion. The first end of the second horizontal portion and the slider 7 The second end of the second horizontal part is fixedly connected with the lower end of the vertical part, the upper end of the vertical part is fixedly connected with the first end of the first horizontal part, and the connecting plate 6 is hinged to the lower side of the first horizontal part. The adjusting bracket 4 is a truss structure, which is welded by several square steels. The connecting plate 6 is hinged to the first horizontal part through a hinge 11, wherein one free end of the connecting plate 6 and the hinge 11 are fixedly connected by bolts, and the other free end of the hinge 11 is fixedly connected with the first horizontal part by bolts. The free ends can rotate relatively. By sliding the slider 7 upward on the vertical guide rail 8, the bearing plate 5 can be made higher than the connecting frame 10-1, thereby avoiding the chassis and the connecting frame 10-1 from colliding with each other.

When there are two horizontal adjustment structures, two-way size adjustment can be realized, and when there are one horizontal adjustment structures, one-way size adjustment can be realized. In this embodiment, both the vertical plate and the horizontal adjustment structure are two, and they are symmetrically distributed on both sides of the column support structure 10. The horizontal adjustment structure includes a first horizontal adjustment structure and a second horizontal adjustment structure. By symmetrically setting the first level adjustment structure and the second level adjustment structure, the moments on both sides can be balanced, thereby improving the overall stability.

In this embodiment, the linear guide structure of the first level adjustment structure is a screw nut assembly, and the linear guide structure of the second level adjustment structure is a linear bearing assembly. The screw nut assembly includes a screw 13 and a nut 14. The two ends of the screw 13 are connected to the adjusting bracket 4 of the first horizontal adjustment structure through the bearing seat 12, and the bearing plate 5 of the first horizontal adjustment structure is fixedly connected to the nut 14. By driving the screw 13 to rotate by the driving motor, the axial position of the nut 14 on the screw 13 can be adjusted. The linear bearing assembly includes an optical shaft 1 and a linear bearing 2. Both ends of the optical shaft 1 are connected to the adjusting bracket 4 of the second horizontal adjustment structure through the optical shaft seat 3, and the carrier plate 5 of the second horizontal adjustment structure is fixed to the linear bearing 2 Connected.

Due to the limited radial bearing capacity of the screw 13 and the optical axis 1, in order to meet the test requirements of a large-tonnage chassis, the bearing plate 5 of this embodiment is in sliding contact with the adjusting bracket 4, so that the screw 13 only bears axial force, and the optical axis 1 For guidance only.

When adjusting the position of the bearing plate 5, in order to prevent the bearing plate 5 from separating from the adjusting bracket 4, the adjusting bracket 4 of this embodiment has a limit baffle at one end away from the column support structure 10, and the limit baffle is used to limit the bearing plate 5 The displacement.

According to the principles of force balance and moment balance, the force and moment equations of the adjustment bracket 4 can be obtained, and the force and moment diagram of the adjustment bracket 4 can be calculated as shown in FIG. 5. It can be seen that the reasonable selection of the connection position of the connecting plate 6 and the road simulation test bench can avoid the additional bending moment due to the increase of the force arm, thus ensuring the life of the test bench.

In this specification, specific examples are used to describe the principles and implementation of the present invention. The descriptions of the above examples are only used to help understand the methods and core ideas of the present invention; at the same time, for those skilled in the art, according to this The idea of the invention will change in the specific implementation and application scope. In summary, the content of this specification should not be construed as limiting the present invention.

Claims (10)

A road simulation test bench, which is characterized in that it comprises: Column support structure; A horizontal adjustment structure, the horizontal adjustment structure includes an adjustment bracket, a linear guide structure and a bearing plate, the linear guide structure is fixed on the adjustment bracket, the linear guide structure is used to support the bearing plate and make the bearing plate The board moves in a straight line, and the first end of the adjustment bracket is connected to the column support structure; The connecting plate is hinged to the lower side of the linear guide structure. The road simulation test bench according to claim 1, wherein the column support structure includes a connecting frame, a vertical plate and two columns, and the upper ends of the two columns are fixedly connected by the connecting frame, so The vertical plate is fixed to the end of the connecting frame, the first end of the adjusting bracket is connected to the vertical plate, and the bearing plate is located on the plane where the axes of the two uprights are located. The road simulation test bench according to claim 2, wherein the adjustment bracket is connected to the vertical plate through a vertical adjustment structure, and the vertical adjustment structure includes a vertical guide rail and a sliding block, so The vertical guide rail is fixed on the vertical plate along the vertical direction, the slider is slidably arranged on the vertical guide rail, and the first end of the adjusting bracket is fixedly connected with the slider. The road simulation test bench according to claim 3, wherein the adjusting bracket is a Z-shaped structure, including a first horizontal part, a vertical part and a second horizontal part, the first of the second horizontal part The second end of the second horizontal part is fixedly connected to the lower end of the vertical part, and the upper end of the vertical part is fixedly connected to the first end of the first horizontal part. , The connecting plate is hinged to the lower side of the first horizontal part. The road simulation test bench according to claim 2, wherein the vertical plate and the horizontal adjustment structure are both two, and they are symmetrically distributed on both sides of the column support structure, and the horizontal adjustment The structure includes a first level adjustment structure and a second level adjustment structure. The road simulation test bench according to claim 5, wherein the linear guide structure of the first level adjustment structure is a screw nut assembly, the screw nut assembly comprising a screw and a nut, the Both ends of the lead screw are connected to the adjusting bracket of the first horizontal adjustment structure through a bearing seat, and the bearing plate of the first horizontal adjustment structure is fixedly connected with the nut. The road simulation test bench according to claim 6, wherein the linear guide structure of the second level adjustment structure is a linear bearing assembly, and the linear bearing assembly includes an optical shaft and a linear bearing, and the light The two ends of the shaft are connected to the adjusting bracket of the second horizontal adjustment structure through an optical shaft seat, and the carrying plate of the second horizontal adjustment structure is fixedly connected with the linear bearing. The road simulation test bench according to claim 1, wherein the end of the adjustment bracket away from the column support structure has a limit baffle, and the limit baffle is used to limit the load of the bearing plate. Displacement. The road simulation test bench according to claim 1, wherein the bearing plate is in sliding contact with the adjusting bracket. The road simulation test bench according to claim 1, wherein the lower end of the column has a flange end surface, and the flange end surface is used for fixing to the ground by bolts.

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