CN207649567U - A kind of simulation detection fixture of automobile chassis rear overhang assembling process part deviation accumulation - Google Patents

Abstract

A simulated detection tool for the accumulation of part deviation in the assembly process of the rear suspension of the automobile chassis. This detection tool uses the assembly tool on the detection platform and measures the tolerance of the post-assembly tool through the detection equipment. Through this tool, the functions of the various parts of the rear suspension of the automobile chassis are realized. The inspection of parameters such as dimensional manufacturing deviation and assembly functional size, check the qualification of the chassis rear suspension, and simulate the deviation accumulation phenomenon in the assembly process of the chassis rear suspension, analyze and compare the cumulative effect of parts manufacturing deviation in the assembly process on the The influence of the functional dimensions of the rear suspension assembly after assembly is used to obtain the contribution relationship between the manufacturing deviation of each part and the final assembly deviation, so as to provide guidance for the tolerance optimization of the parts, improve the accuracy of the rear suspension assembly, and improve the driving performance of the vehicle.

Description

A simulation detection tool for the accumulation of part deviation in the assembly process of the rear suspension of the automobile chassis

technical field

The utility model relates to the field of assembly of automobile chassis parts, in particular to a simulated detection tool for the accumulation of part deviation in the process of the rear suspension device of the automobile chassis.

Background technique

At present, domestic automobile manufacturers mostly control the dimensional accuracy of the chassis from the manufacturing accuracy of parts. Taking the rear suspension system of the chassis as an example, it is composed of rear suspension shock absorbers, shock absorbing spring bases, torsion beams, longitudinal swing arms and other parts. , when controlling the dimensional accuracy, the automobile manufacturer puts forward design requirements for the manufacturing tolerance of these parts, that is, the manufacturing deviation of the parts needs to be controlled within a certain range before the assembly of the rear suspension can be carried out. Sometimes considering the manufacturing cost, the tolerance of the parts The difference will be designed to be relatively loose. In the process of assembling these parts with manufacturing deviations into the rear suspension assembly, the accumulation of deviations is unavoidable, and the accumulation of deviations may lead to out-of-tolerance parameters such as the functional dimensions of the rear suspension assembly after final assembly, and this The out-of-tolerance problem cannot be effectively controlled under the existing conditions, and there is no special inspection device to test the qualification of the assembly assembly, and to conduct in-depth detection and analysis of this out-of-tolerance problem.

There are the following problems:

The manufacture and assembly of automobile chassis parts is an important part of the overall automobile manufacturing and assembly process. The chassis of the car is assembled with the devices needed for the car to travel. It is composed of the transmission system, suspension system, steering system, brake system and driving system. This leads to out-of-tolerance problems in parameters such as the functional dimensions of the chassis assembly, which affects the driving performance of the car such as handling stability, steering performance, and safety performance, and may even cause difficulties in matching the chassis and body floor.

Utility model content

The utility model provides a tool for simulating and detecting part deviation accumulation in the rear suspension device of an automobile chassis, aiming to solve:

1. Through this tooling, the manufacturing deviation of the functional dimensions of each part of the rear suspension of the automobile chassis and the functional dimensions of the assembly are detected, and the accumulation of deviations in the assembly process of the parts is simulated to check the qualification of the rear suspension of the chassis. The simulation of deviation accumulation refers to installing the parts containing manufacturing deviations on the inspection tool according to the actual assembly sequence, and completing the simulation of the part deviation accumulation process through the simulation of the assembly process.

2. Analyze the cumulative effect of parts manufacturing deviations in the assembly process on the functional dimensions of the rear suspension assembly after assembly, and obtain the contribution relationship of each part manufacturing deviation to the final assembly deviation, thereby providing guidance for the tolerance optimization of parts and improving The accuracy of the rear suspension assembly, improving the driving performance of the vehicle and other issues.

In order to achieve the above purpose, the technical solution adopted by the utility model is to provide a simulated detection tool for the accumulation of parts deviation in the assembly process of the rear suspension of the automobile chassis. Point connection module, automobile chassis rear suspension, auxiliary measuring device, said automobile chassis rear suspension includes rear suspension shock absorber, shock absorption spring base, torsion beam, longitudinal swing arm, said rear suspension shock absorber, shock absorption spring The base, the torsion beam, and the longitudinal swing arm are connected in sequence and connected with the connection module of the rear suspension installation point, and connected to the frame of the inspection platform through the connection module of the rear suspension installation point. There are four design connection modules of the rear suspension installation point. The suspension installation point connection module is installed on the frame connection arm of the testing platform, the positions of the first rear suspension installation point connection module and the second rear suspension installation point connection module on the detection platform frame are respectively connected with the third rear suspension installation point connection module, The position of the connecting module of the fourth rear suspension installation point is symmetrical on the testing platform frame, the testing platform positioning system is installed on the testing platform frame, and the testing platform frame is fixedly connected to the base platform.

As a further improvement of the utility model, the auxiliary measuring device is a three-coordinate measuring machine or a high-precision optical measuring device.

As a further improvement of the utility model, the frame of the testing platform and the base platform are fixedly connected by six connecting plates.

As a further improvement of the utility model, the connecting plate positions and fixes the frame of the testing platform through positioning pins and fastening bolts.

As a further improvement of the utility model, the detection platform positioning system includes five positioning blocks, the positioning blocks are distributed around the frame of the testing platform, and are divided into main control and auxiliary control positioning blocks, and the main control positioning block is used to establish a detection The positioning coordinate system of the platform is used as the global coordinate system during detection, and the auxiliary control positioning block is used to ensure the relative position accuracy.

As a further improvement of the utility model, the positioning block includes a positioning block base and a positioning ball head, the positioning ball head is connected to the position fast base, the positioning block base is fixedly connected to the frame of the detection table, and the precise positioning ball head is obtained by a three-coordinate machine The position of the center of the sphere realizes the positioning of the detection platform.

The beneficial effects of the utility model are: detecting the functional size of the rear suspension assembly and the size deviation of the corresponding parts constituting the rear suspension assembly, checking the qualification of the chassis rear suspension; Simulate and analyze the cumulative effect of parts manufacturing deviations in the assembly process on the functional dimensions of the rear suspension assembly after assembly, and obtain the contribution relationship of each part manufacturing deviation to the final assembly deviation, thereby providing guidance for the tolerance optimization of parts and improving The precision of the rear suspension assembly improves the driving performance of the vehicle.

Description of drawings

Fig. 1 is the schematic diagram of the detection tool of the present invention being mounted on the rear suspension of the chassis;

Fig. 2 is a three-dimensional structural schematic diagram of a detection tool of the present invention;

Fig. 3 is a schematic diagram of the frame connecting plate of the present invention;

Fig. 4 is the positioning block schematic diagram of the present utility model;

Fig. 5 is a schematic diagram of the connection module of the rear suspension mounting point of the present invention;

Fig. 6 is a structural diagram of the rear suspension of the chassis of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 6, a simulated detection tool for the accumulation of component deviations in the rear suspension assembly process of an automobile chassis, including a base platform 2, a detection platform frame 3, a detection platform positioning system 5, a rear suspension mounting point connection module 6, and a vehicle Chassis rear suspension 7, auxiliary measuring device, described automobile chassis rear suspension 7 comprises rear suspension shock absorber 71, shock absorbing spring base 72, torsion beam 73, longitudinal swing arm 74, described rear suspension shock absorber 71, shock absorber The shock spring base 72, the torsion beam 73, and the longitudinal swing arm 74 are connected in sequence and connected with the rear suspension installation point connection module 6, and are connected to the detection table frame 3 through the rear suspension installation point connection module 6, and the rear suspension installation point is connected to A total of four modules 6 are designed. The rear suspension installation point connection module 6 is installed on the connecting arm of the test bench frame 3. The first rear suspension installation point connection module 61 and the second rear suspension installation point connection module 62 are installed on the test bench frame 3. The positions are respectively symmetrical with the positions of the third rear suspension installation point connection module 63 and the fourth rear suspension installation point connection module 64 on the detection platform frame 3, and the detection platform positioning system 5 is installed on the detection platform frame 3 , the test bench frame 3 is fixedly connected to the base platform 2

Specifically, the test bench frame 3 and the base platform 1 are fixedly connected through six connecting plates 4 .

Specifically, the connecting plate 4 positions and fixes the testing table frame 3 through the positioning pin 41 and the fastening bolt 42 .

Specifically, the detection station positioning system includes five positioning blocks 5, the positioning blocks 5 are distributed around the detection station frame 3, and are divided into main control and auxiliary control positioning blocks, and the main control positioning block is used to establish the detection platform. The positioning coordinate system is used as the global coordinate system during detection, and the auxiliary control positioning block is used to ensure the relative position accuracy.

Specifically, the positioning block 5 includes a positioning block base 51 and a positioning ball head 52. The positioning ball head 52 is connected to the positioning fast base 51. The positioning block base 51 is fixedly connected to the detection table frame 3, and the precise positioning is obtained by a three-coordinate machine. The position of the ball center of the ball head realizes the positioning of the detection table.

Through this testing tool, use the assembly tooling on the testing platform and measure the tolerance of the tooling after assembly through the testing equipment. Through this tooling, the manufacturing deviation of the functional dimensions of each part of the rear suspension 7 of the automobile chassis and the functional dimensions of the assembly are realized. Test, check the qualification of the chassis rear suspension 7, and simulate the deviation accumulation phenomenon of the chassis rear suspension 7 in the assembly process, analyze and compare the cumulative effect of the part manufacturing deviation in the assembly process on the function size of the rear suspension 7 assembly after assembly The influence of each part's manufacturing deviation on the final assembly deviation is obtained, so as to provide guidance for the tolerance optimization of parts, improve the accuracy of rear suspension assembly, and improve the driving performance of the vehicle.

In order to make the present invention easy to understand, some directional terms are used in this specification. It should be noted that the directional terms mentioned in this specification, such as "up", "down", "left", "right", "front", "rear", etc., refer to the directions of the drawings. The positive direction of X is right, the negative direction of X is left, the positive direction of Y is front, the negative direction of Y is back, the positive direction of Z is up, and the negative direction of Z is down. The directional terms used are used to illustrate and understand the utility model, but not to limit the protection scope of the utility model.

Referring to Fig. 2, the base platform 2 of the detection tool 1 is a rectangular structure, the length direction of the base platform 2 is defined as the X direction of the Cartesian coordinate system, the width direction is the Y direction, and the vertical direction perpendicular to the base platform 2 is the Z direction. The X direction is defined as the vertical direction, the Y direction is defined as the horizontal direction, and the Z direction is defined as the vertical direction. The length and width of the base platform 2 are both 1 to 3 meters. Place the detection platform frame 3 on the base platform 2, the frame 3 is fixed by the frame connecting plate 4 and the base platform 2, and the frame 3 is provided with a plurality of positioning blocks 5, which constitute the positioning system of the detection platform, including a positioning block base 51 and positioning balls Head 52, the detection platform positioning system includes 2 to 5 positioning blocks 5 (see Figure 2), the distribution example of 4 positioning blocks 5 is shown in the figure, 2 main control positioning blocks are located in the longitudinal direction of the testing platform, and the connecting plate The upper surface is jointly used to create a measurement coordinate system, and the two auxiliary control positioning blocks are used to ensure the relative position accuracy of the frame, and the base 51 of the positioning block 5 is connected and fixed to the detection table frame 3 . Rear suspension installation point connection modules 6 are installed on the detection platform frame 3 corresponding to each installation position on the chassis rear suspension 7. In the present embodiment, there are 4 installation points on the chassis rear suspension 7, so the Four rear suspension installation point connection modules 61-64 are provided, wherein 61, 62 are symmetrical to the structures of 63, 64 respectively, and Fig. 5 shows the structures of the rear suspension installation point connection modules 61, 62. The detected chassis rear suspension 7 is assembled from a plurality of parts, specifically including a rear suspension shock absorber 71 , a shock absorbing spring base 72 , a torsion beam 73 , and a longitudinal swing arm 74 . When performing deviation accumulation simulation, the above-mentioned parts are sequentially installed on the inspection tool 1 according to the on-site assembly process and corresponding specifications, and the auxiliary measurement equipment is used to detect the dimensional deviation of each part and the functional dimensions of the assembled rear suspension assembly. A schematic diagram of the assembly of the chassis rear suspension 7 on the inspection tool 1 is shown in FIG. 1 .

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or substitutions can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (6)

1. a kind of simulation detection fixture of automobile chassis rear overhang assembling process part deviation accumulation, which is characterized in that the simulation is examined Survey tooling include base platform, detection table frame, monitor station positioning system, rear overhang installation point link block, automobile chassis rear overhang, Aided measurement device, the automobile chassis rear overhang include rear overhang damper, damping spring pedestal, reverse crossbeam, longitudinal swing arm, Middle rear overhang damper, damping spring pedestal, torsion crossbeam, longitudinal swing arm are sequentially connected and connect with rear overhang installation point link block It connects, is connected on detection table frame by rear overhang installation point link block, the rear overhang installation point link block is designed with four altogether A, rear overhang installation point link block is mounted on monitor station frame connection arms, the first rear overhang installation point link block, the second rear overhang Position of the installation point link block on detection table frame, is installed with third rear overhang installation point link block, the 4th rear overhang respectively Positional symmetry of the point link block on detection table frame, the monitor station positioning system are mounted on the detection table frame, Detection table frame is fixedly connected on base platform.

2. a kind of simulation detection fixture of automobile chassis rear overhang assembling process part deviation accumulation as described in claim 1, It is characterized in that, the aided measurement device is three coordinate measuring machine or high-precision optical measuring apparatus.

3. a kind of simulation detection fixture of automobile chassis rear overhang assembling process part deviation accumulation as described in claim 1, It is characterized in that, the detection table frame is fixedly connected with base platform by 6 connecting plates.

4. a kind of simulation detection fixture of automobile chassis rear overhang assembling process part deviation accumulation as described in claim 1, It is characterized in that, the connecting plate is positioned and fixed to detection table frame by positioning pin and fastening bolt.

5. a kind of simulation detection fixture of automobile chassis rear overhang assembling process part deviation accumulation as described in claim 1, It being characterized in that, the monitor station positioning system includes five locating pieces, and the locating piece is distributed in the surrounding of detection table frame, point For master control and auxiliary control locating piece, master control locating piece is used to establish the location coordinate of monitor station, and using the location coordinate as Global coordinate system when detection, auxiliary control locating piece is for ensureing relative positional accuracy.

6. a kind of simulation detection fixture of automobile chassis rear overhang assembling process part deviation accumulation as claimed in claim 5, It is characterized in that, the locating piece includes locating piece pedestal and positioning bulb, and positioning bulb is connected on the fast pedestal in status, positions Block pedestal is fixedly connected with detection table frame, and obtaining precision positioning bulb sphere center position by three coordinate machine realizes to monitor station Positioning.