Detection tool for vehicle trailing arm

Abstract

The detection tool comprises a main body frame, and a first positioning seat, a second positioning seat and a third positioning seat which are respectively arranged on the main body frame, after a first positioning part penetrating through one end of a vehicle trailing arm is arranged on the first positioning seat, a second positioning part penetrating through the other end of the vehicle trailing arm is arranged on the second positioning part; the position degrees of the positioning holes in the two ends of the vehicle trailing arm are directly detected through the matching relation of the second positioning parts, and the top face precision and the side face precision of the vehicle trailing arm are verified through the top face detection part and the side face detection part under the condition of the same reference on the premise that the first positioning parts keep the relative positions of the vehicle trailing arm. The precision of the vehicle trailing arm is detected through the upper limit and the lower limit of the design requirement of the vehicle trailing arm, integration of multiple data on multiple stations is omitted through the unified position reference provided by the main body frame, the operation efficiency is improved, the labor intensity of detection operation is reduced, and the reliability and the accuracy are improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle longitudinal arm detection, and in particular to a detection tool for a vehicle longitudinal arm. Background Art

[0002] The vehicle trailing arm is often called the control arm. It is an important part of the vehicle suspension system and is mainly used in independent suspension structures. The trailing arm connects the wheel and the body. Its main function is to transmit the force and torque between the wheel and the body, while limiting and guiding the movement trajectory of the wheel to ensure that the wheel remains correctly positioned when bouncing up and down, thereby maintaining the stability and handling of the vehicle. The design of the longitudinal arm is diverse. During the dynamic driving of the vehicle, the length and stiffness of the longitudinal arm directly affect the changes in geometric parameters such as the camber angle and toe angle of the wheel, which in turn affects the contact characteristics of the tire with the ground, which has an important impact on the vehicle's steering response, straight-line driving stability and ride comfort. When the vehicle encounters an uneven road surface, the longitudinal arm can also effectively absorb and buffer vibrations, reduce the impact transmitted to the vehicle body, and improve the smoothness of driving. At present, the inspection of the vehicle's longitudinal arm is carried out by manually operating the vehicle's longitudinal arm at multiple inspection positions using different inspection gauges, and judging whether the accuracy of the vehicle's longitudinal arm meets the requirements based on the data feedback of the inspection results. During the inspection process, the operator is required to operate the vehicle's longitudinal arm one by one to conduct inspections between multiple workstations, and multiple workstations only provide reliability for a single inspection data, and cannot maintain the accuracy between multiple data, resulting in low inspection efficiency, low reliability and low accuracy. Utility Model Content

[0003] In view of the defects existing in the prior art, the present application provides a vehicle longitudinal arm detection tooling to solve the problem of low efficiency and low accuracy of vehicle longitudinal arm detection in the prior art.

[0004] The above-mentioned purpose of the present application is mainly achieved through the following technical solutions:

[0005] A detection tool for a vehicle longitudinal arm, the detection tool comprising:

[0006] Main frame;

[0007] A first positioning seat, wherein the first positioning seat is provided with a first positioning portion for passing through one end of the vehicle longitudinal arm, and the first positioning portion is detachably connected to the first positioning seat;

[0008] A second positioning seat, wherein the second positioning seat is provided with a second positioning portion for passing through the other end of the vehicle longitudinal arm, and the second positioning portion is detachably connected to the second positioning seat;

[0009] A third positioning seat is provided with a working space for accommodating the vehicle longitudinal arm, and a top surface detection part and a side surface detection part are movably provided on the third positioning seat.

[0010] In an optional embodiment, a plurality of support columns are provided on the main frame, and the plurality of support columns are used to support the vehicle longitudinal arms.

[0011] In an optional embodiment, the vehicle longitudinal arm is kept in clearance fit with the working space.

[0012] In an optional embodiment, the first positioning portion and the second positioning portion respectively cooperate with positioning holes at both ends of the vehicle longitudinal arm.

[0013] In an optional embodiment, the detection tool further includes a third positioning portion, the second positioning portion or the third positioning portion can be connected to the second positioning seat, and the third positioning portion is used to limit the movement of the vehicle longitudinal arm close to or away from the first positioning portion.

[0014] In an optional embodiment, the top surface detection portion includes a first top surface detection roller and a second top surface detection roller. The first top surface detection roller or the second top surface detection roller can be movably disposed on the third positioning seat and can roll along the extension direction of the vehicle longitudinal arm in the working space.

[0015] In an optional embodiment, the outer diameter of the first top surface detection roller is smaller than the outer diameter of the second top surface detection roller, and the first top surface detection roller is used to provide a reference for the minimum size of the top surface of the vehicle longitudinal arm, and the second top surface detection roller is used to provide a reference for the maximum size of the top surface of the vehicle longitudinal arm.

[0016] In an optional embodiment, a plurality of clamping members for clamping the vehicle longitudinal arms are provided on the main frame.

[0017] In an optional embodiment, the side detection portion includes a detection rod, and the detection rod is used to extend between a side wall of the vehicle longitudinal arm and a side wall of the working space.

[0018] In an optional embodiment, the side detection portion further includes a slide seat, the detection rod is vertically fixed on the slide seat, and when the detection rod is extended into the working space, the slide seat can slide on the third positioning seat.

[0019] Compared with the prior art, the advantages of this application are:

[0020] The detection tooling of the present application includes a main frame and a first positioning seat, a second positioning seat and a third positioning seat respectively arranged on the main frame, the first positioning seat is provided with a first positioning part for passing through one end of the vehicle longitudinal arm, the first positioning part is detachably connected to the first positioning seat, the second positioning seat is provided with a second positioning part for passing through the other end of the vehicle longitudinal arm, the second positioning part is detachably connected to the second positioning seat, the third positioning seat is provided with an operating space for accommodating the vehicle longitudinal arm, and the third positioning seat is movably provided with a top surface detection part and a side surface detection part. When performing the detection operation, the working space mounted on the third positioning seat in coordination with the vehicle longitudinal arm is taken, and the first positioning seat is used to detect the side surface of the vehicle longitudinal arm. After a first positioning portion passing through one end of the vehicle longitudinal arm is set on the seat, a second positioning portion passing through the other end of the vehicle longitudinal arm is set on the second positioning portion, and the position of the positioning holes at both ends of the vehicle longitudinal arm is directly detected through the matching relationship of the second positioning portion. On the premise that the first positioning portion maintains the relative position of the vehicle longitudinal arm, the top surface accuracy and side surface accuracy of the vehicle longitudinal arm are verified under the same reference condition through the top surface detection portion and the side surface detection portion, so as to detect the accuracy of the vehicle longitudinal arm through the upper and lower limits of the vehicle longitudinal arm design requirements. The unified position reference provided by the main frame eliminates the need for integration of multiple data at multiple workstations, thereby improving work efficiency, reducing the labor intensity of detection operations, and improving reliability and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the structure of the inspection tooling during inspection operation provided in an embodiment of the present application;

[0023] Figure 2 A cross-sectional view of the inspection tool provided in the embodiment of the present application;

[0024] In the figure: 100, main frame; 101, support column; 102, clamping member; 200, first positioning seat; 201, first positioning part; 300, second positioning seat; 301, second positioning part; 302, third positioning part; 400, third positioning seat; 401, working space; 501, top surface detection part; 502, first top surface detection roller; 503, second top surface detection roller; 600, side detection part; 601, detection rod; 602, slide seat; 700, vehicle longitudinal arm. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structural and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments described herein.

[0026] Figure 1 This is a schematic diagram of the structure of the detection tooling provided in the embodiment of the present application during the detection operation. Figure 2 A cross-sectional view of the inspection tooling provided in an embodiment of the present application.

[0027] like Figure 1 As shown, a detection tool for a vehicle longitudinal arm 700, the detection tool comprises a main frame 100, a first positioning seat 200, a second positioning seat 300 and a third positioning seat 400, wherein:

[0028] The main frame 100 serves as a relative operating reference, which is used to carry and fix the first positioning seat 200, the second positioning seat 300 and the third positioning seat 400. Correspondingly, the first positioning seat 200, the second positioning seat 300 and the third positioning seat 400 are respectively maintained at relative positions based on the main frame 100, so that when configuring the relevant specification parameters of the first positioning seat 200, the second positioning seat 300 and the third positioning seat 400, the uniformity can be higher, and when the main frame 100 is moved as a whole, the relevant positions of the first positioning seat 200, the second positioning seat 300 and the third positioning seat 400 can be kept relatively fixed, thereby improving reliability and avoiding relative displacement caused by repeated operations.

[0029] The first positioning seat 200 is provided with a first positioning portion 201 for passing through one end of the vehicle longitudinal arm 700. The first positioning portion 201 is detachably connected to the first positioning seat 200. The specifications of the first positioning portion 201 are matched with the positioning hole at one end of the vehicle longitudinal arm 700 and the first positioning seat 200 respectively. The first positioning portion 201 can penetrate the positioning hole at one end of the vehicle longitudinal arm 700 while also being inserted into the first positioning seat 200. The first positioning portion 201 limits the displacement of the vehicle longitudinal arm 700 in the radial direction of the positioning hole, thereby maintaining the detection condition of the vehicle longitudinal arm 700 in this direction.

[0030] The second positioning seat 300 is provided with a second positioning portion 301 for passing through the other end of the vehicle longitudinal arm 700. The second positioning portion 301 is detachably connected to the second positioning seat 300. The specifications of the second positioning portion 301 are matched with the positioning hole at the other end of the vehicle longitudinal arm 700 and the second positioning seat 300 respectively. The second positioning portion 301 can penetrate the positioning hole at the other end of the vehicle longitudinal arm 700 while also being inserted into the first positioning seat 200. Then, the position accuracy between the two positioning holes on the vehicle longitudinal arm 700 is determined by the degree of fit between the second positioning portion 301 and the vehicle longitudinal arm 700 at the positioning hole, so as to detect the corresponding position accuracy and operation accuracy of the vehicle longitudinal arm 700 after installation.

[0031] The third positioning seat 400 is provided with a working space 401 for accommodating the vehicle longitudinal arm 700, and the third positioning seat 400 is movably provided with a top surface detection part 501 and a side detection part 600. After the vehicle longitudinal arm 700 is erected, the middle part of the vehicle longitudinal arm 700 is correspondingly located in the working space 401. The top surface detection part 501 and the side detection part 600 movably provided on the third positioning seat 400 can respectively use the top surface of the third positioning seat 400 as a moving reference to perform top surface detection and side detection of the vehicle longitudinal arm 700, and respectively feedback whether the top surface and side of the vehicle longitudinal arm 700 are in compliance through the detection results of the top surface detection part 501 and the side detection part 600.

[0032] like Figure 1 As shown, Figure 1The present invention provides a structural schematic diagram of the detection tooling during the detection operation of the detection tooling provided in the embodiment of the present application. In an optional embodiment, the detection tooling of the present application includes a main frame 100 and a first positioning seat 200, a second positioning seat 300 and a third positioning seat 400 respectively arranged on the main frame 100, the first positioning seat 200 is provided with a first positioning portion 201 for passing through one end of the vehicle longitudinal arm 700, the first positioning portion 201 is detachably connected to the first positioning seat 200, the second positioning seat 300 is provided with a second positioning portion 301 for passing through the other end of the vehicle longitudinal arm 700, the second positioning portion 301 is detachably connected to the second positioning seat 300, the third positioning seat 400 is provided with an operating space 401 for accommodating the vehicle longitudinal arm 700, and the third positioning seat 400 is movably provided with a top surface detection portion 501 and a side detection portion 600. When performing the detection operation, take the vehicle longitudinal arm 700 In the working space 401 mounted on the third positioning seat 400, after the first positioning portion 201 penetrating one end of the vehicle longitudinal arm 700 is set on the first positioning seat 200, the second positioning portion 301 penetrating the other end of the vehicle longitudinal arm 700 is set on the second positioning portion 301, and the position of the positioning holes at both ends of the vehicle longitudinal arm 700 is directly detected through the matching relationship of the second positioning portion 301. On the premise of keeping the first positioning portion 201 to maintain the relative position of the vehicle longitudinal arm 700, the top surface accuracy and side surface accuracy of the vehicle longitudinal arm 700 are verified under the same reference condition through the top surface detection portion 501 and the side detection portion 600, so as to detect the accuracy of the vehicle longitudinal arm 700 through the upper and lower limits of the design requirements of the vehicle longitudinal arm 700, and the unified position reference provided by the main frame 100 eliminates the integration of multiple data on multiple workstations, improves work efficiency, reduces the labor intensity of detection work, and improves reliability and accuracy.

[0033] like Figure 1 , Figure 2 As shown, in an optional embodiment, a plurality of support columns 101 are provided on the main frame 100, and the plurality of support columns 101 are used to support the vehicle longitudinal arm 700. The support columns 101 provide support for the vehicle longitudinal arm 700, and the relative assumed height of the vehicle longitudinal arm 700 is kept uniform through the plurality of support columns 101, thereby maintaining the relative distance between the vehicle longitudinal arm 700 and the main frame 100 without being affected by the first positioning seat 200, the second positioning seat 300 and the third positioning seat 400, thereby maintaining reliable detection of the vehicle longitudinal arm 700.

[0034] like Figure 1 , Figure 2As shown, in an optional embodiment, the clearance between the vehicle longitudinal arm 700 and the working space 401 is maintained to provide a hypothetical space in the middle of the vehicle longitudinal arm 700, while avoiding contact between the vehicle longitudinal arm 700 and the third positioning seat 400. When the third positioning seat 400 detects vehicle longitudinal arms 700 of different precisions, it avoids interference with the relative position of the vehicle longitudinal arm 700, thereby improving detection reliability.

[0035] In order to maintain a stable clearance fit between the vehicle longitudinal arm 700 and the working space 401 , a support column 101 may be provided in the working space 401 to maintain reliable support for the middle portion of the vehicle longitudinal arm 700 .

[0036] like Figure 1 , Figure 2 As shown, in an optional embodiment, the first positioning portion 201 and the second positioning portion 301 respectively cooperate with the positioning holes at both ends of the vehicle longitudinal arm 700, so that under the premise that the first positioning portion 201 positions the vehicle longitudinal arm 700, the second positioning portion 301 can detect the position between the positioning holes of the vehicle longitudinal arm 700.

[0037] like Figure 1 , Figure 2 As shown, in an optional embodiment, the detection tool further includes a third positioning portion 302, the second positioning seat 300 can be connected to the second positioning portion 301 or the third positioning portion 302, and the third positioning portion 302 is used to limit the movement of the vehicle longitudinal arm 700 close to or away from the first positioning portion 201, the second positioning portion 301 cooperates with the positioning hole of the vehicle longitudinal arm 700, that is, the second positioning portion 201 is installed on the first positioning seat 200, and after the second positioning portion 301 is installed on the second positioning seat 300, the second positioning portion 301 can be moved by the second positioning portion 30 1. Detect the position of the two positioning holes of the vehicle longitudinal arm 700. After completing the operation detection of the second positioning part 301, remove the second positioning part 301, and then operate the third positioning part 302 to be assembled on the second positioning seat 300. At this time, the third positioning part 302 only limits the movement of the vehicle longitudinal arm 700 in the direction close to or away from the first positioning part 201, reduces the constraint on the vehicle longitudinal arm 700, and facilitates more reliable results when detecting the top surface and side surface of the vehicle longitudinal arm 700, avoiding the first positioning part 201 and the second positioning part 301 directly locking the vehicle longitudinal arm 700.

[0038] like Figure 1 , Figure 2As shown, in an optional embodiment, the top surface detection portion 501 includes a first top surface detection roller 502 and a second top surface detection roller 503, and the first top surface detection roller 502 or the second top surface detection roller 503 can be movably arranged on the third positioning seat 400, and can roll along the extension direction of the vehicle longitudinal arm 700 in the working space 401, so that the first top surface detection roller 502 and the second top surface detection roller 503 can detect the top surface of the vehicle longitudinal arm 700 during the rolling process, and the top surface of the third positioning seat 400 remains stable, and the corresponding detection positions of the first top surface detection roller 502 and the second top surface detection roller 503 extend into the working space 401, and through the relative position relationship with the vehicle longitudinal arm 700, the accuracy range of the vehicle longitudinal arm 700 is reflected.

[0039] like Figure 1 , Figure 2 As shown, in an optional embodiment, the outer diameter of the first top surface detection roller 502 is smaller than the outer diameter of the second top surface detection roller 503, and the first top surface detection roller 502 is used to provide a reference for the minimum size of the top surface of the vehicle longitudinal arm 700, and the second top surface detection roller 503 is used to provide a reference for the maximum size of the top surface of the vehicle longitudinal arm 700, that is, during the detection process, when the first top surface detection roller 502 can smoothly roll over the vehicle longitudinal arm 700, the accuracy of the vehicle longitudinal arm 700 is within the tolerance range, and when the first top surface detection roller 502 abuts against the vehicle longitudinal arm 700 and cannot smoothly roll over the vehicle longitudinal arm 700, the accuracy of the vehicle longitudinal arm 700 is outside the tolerance range, that is, the vehicle longitudinal arm 700 is too large at this time, and the top surface of the vehicle longitudinal arm 700 cannot be normally assembled with other parts;

[0040] That is, during the detection process, when the second top surface detection roller 503 can smoothly roll over the vehicle longitudinal arm 700, the accuracy of the vehicle longitudinal arm 700 is within the tolerance range; when the second top surface detection roller 503 abuts against the vehicle longitudinal arm 700 and cannot smoothly roll over the vehicle longitudinal arm 700, the accuracy of the vehicle longitudinal arm 700 is outside the tolerance range, that is, the vehicle longitudinal arm 700 is too small at this time, and the top surface of the vehicle longitudinal arm 700 cannot be normally assembled with other parts. Even if the assembly is completed, it will lead to problems such as loose fit and poor assembly connection.

[0041] like Figure 1 , Figure 2 As shown, in an optional embodiment, the main frame 100 is provided with a plurality of clamping members 102 for clamping the vehicle longitudinal arm 700 to maintain the relative stability of the vehicle longitudinal arm 700 during the detection process, so as to facilitate reliable operation.

[0042] In an optional embodiment, the side detection unit 600 includes a detection rod 601, which is used to extend between the side wall of the vehicle longitudinal arm 700 and the side wall of the working space 401. The detection rod 601 extends into the working space 401, and uses the side wall of the working space 401 as a reference to judge the size range of the side wall of the vehicle longitudinal arm 700. During the detection process, the side wall of the detection rod 601 is always kept attached to the inner wall of the working space 401, and the relative distance between the detection rod 601 and the vehicle longitudinal arm 700 is used to judge whether the side wall specification of the vehicle longitudinal arm 700 is too large, and the operability is strong.

[0043] In order to maintain the smoothness of the detection operation, a detection wheel may be provided on the detection rod 601, and the smoothness of the displacement may be improved by the rolling of the detection wheel.

[0044] like Figure 1 , Figure 2 As shown, in an optional embodiment, the side detection unit 600 also includes a slide 602, and the detection rod 601 is vertically fixed on the slide 602. When the detection rod 601 extends into the working space 401, the slide 602 can slide on the third positioning seat 400, thereby improving the convenience of mobile detection of the side detection unit 600.

[0045] It should be understood that the terms first, second, etc. are only used to distinguish descriptions and should not be understood as indicating or implying relative importance. Although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit may be referred to as the second unit, and similarly, the second unit may be referred to as the first unit without departing from the scope of the exemplary embodiments of the present utility model.

[0046] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another relationship between associated objects, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0047] It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside", etc. indicate orientations or positional relationships that are customarily placed when the disclosed product is used, or are orientations or positional relationships that are customarily understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The terms used herein are only used to describe specific embodiments and are not intended to limit the exemplary embodiments of the utility model. As used herein, the singular forms "one", "an", and "the" are intended to include plural forms unless the context clearly indicates the opposite meaning. It should also be understood that the terms "include", "comprise", "include", and / or "comprising" when used herein specify the existence of the claimed features, integers, steps, operations, units, and / or components, and do not exclude the existence or increase of one or more other features, quantities, steps, operations, units, components, and / or their combinations.

[0050] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, it should be understood by those of ordinary skill in the art that the exemplary embodiments may be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid making the exemplary embodiments unclear.

[0051] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

[0052] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field.

Claims

1. A vehicle longitudinal arm detection tool, characterized in that: The detection tooling comprises: Main frame; A first positioning seat, wherein the first positioning seat is provided with a first positioning portion for passing through one end of the vehicle longitudinal arm, and the first positioning portion is detachably connected to the first positioning seat; A second positioning seat, wherein the second positioning seat is provided with a second positioning portion for passing through the other end of the vehicle longitudinal arm, and the second positioning portion is detachably connected to the second positioning seat; A third positioning seat is provided with a working space for accommodating the vehicle longitudinal arm, and a top surface detection part and a side surface detection part are movably provided on the third positioning seat.

2. The vehicle longitudinal arm detection tool as claimed in claim 1, characterized in that: The main frame is provided with a plurality of support columns, and the plurality of support columns are used to support the vehicle longitudinal arms.

3. The vehicle longitudinal arm detection tool as claimed in claim 1, characterized in that: And the clearance between the vehicle longitudinal arm and the working space is maintained.

4. The vehicle longitudinal arm detection tool as claimed in claim 1, characterized in that: The first positioning portion and the second positioning portion are respectively matched with positioning holes at both ends of the vehicle longitudinal arm.

5. The vehicle trailing arm detection tool as claimed in claim 1, characterized in that: The detection tool also includes a third positioning portion, the second positioning seat can be connected to the second positioning portion or the third positioning portion, and the third positioning portion is used to limit the movement of the vehicle longitudinal arm close to or away from the first positioning portion.

6. The vehicle trailing arm detection tool as claimed in claim 1, characterized in that: The top surface detection portion includes a first top surface detection roller and a second top surface detection roller. The first top surface detection roller or the second top surface detection roller can be movably disposed on the third positioning seat and can roll along the extension direction of the vehicle longitudinal arm in the working space.

7. The vehicle trailing arm detection tool as claimed in claim 6, characterized in that: The outer diameter of the first top surface detection roller is smaller than the outer diameter of the second top surface detection roller, and the first top surface detection roller is used to provide a reference for the minimum size of the top surface of the vehicle longitudinal arm, and the second top surface detection roller is used to provide a reference for the maximum size of the top surface of the vehicle longitudinal arm.

8. The vehicle trailing arm detection tool as claimed in claim 1, characterized in that: The main body frame is provided with a plurality of clamping members for clamping the vehicle longitudinal arms.

9. The vehicle longitudinal arm detection tool as claimed in claim 1, characterized in that: The side detection portion includes a detection rod, and the detection rod is used to extend between a side wall of the vehicle longitudinal arm and a side wall of the working space.

10. The vehicle trailing arm detection tool as claimed in claim 9, characterized in that: The side detection part further comprises a slide seat, the detection rod is vertically fixed on the slide seat, and when the detection rod is extended into the working space, the slide seat can slide on the third positioning seat.

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