A test fixture used to detect the distance between the two opening center points of the automobile subframe swing arm mounting box

Abstract

This invention discloses a gauge for detecting the distance between the center points of two openings of a vehicle subframe swing arm mounting box. The gauge includes a crossbeam and a first central mechanism and a second central mechanism fixed at both ends of the crossbeam. Both the first and second central mechanisms are equipped with a detection element that can extend and retract in a direction parallel to the crossbeam. The distance between the center points of the first and second central mechanisms is equal to the distance between the center points of the two openings of the vehicle subframe swing arm mounting box. This invention uses the detection element of one central mechanism against the two sides of one opening as a reference for positioning, and then determines whether the distance between the center points of the two openings is acceptable by detecting the gap between the detection element of the other central mechanism and the side of the other opening. This invention is simple to operate, requires no training, and only requires controlling the extension and retraction of the detection element during testing, saving significant manpower and testing costs.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing technology, and in particular to a gauge for detecting the distance between the center points of the two openings of the automotive subframe swing arm mounting box. Background Technology

[0002] As the technical requirements for automotive chassis components continue to increase, the quality inspection requirements also continue to increase, and the inspection tools used for quality inspection are required to closely approximate the actual use conditions in terms of inspection methods.

[0003] The automotive subframe is a core component of a car. During assembly, it needs to house multiple parts such as control arms, longitudinal beams, and stabilizer bars, thus requiring precise dimensional control. Among these, the mounting gap dimensions for the control arms are particularly critical. When assembling the control arms with the subframe, the mounting points need to be inspected to locate the center point of the mounting gap, simulating the actual installation of the control arms and subframe. Currently, the commonly used inspection method in the industry is sleeve inspection. This involves installing sleeves at two gaps to control the center distance between them. While this method has low initial investment, it is cumbersome. Each inspection requires manual installation of the sleeves and clamping with a liner, followed by disassembly and removal of the sleeves after inspection, which is time-consuming, labor-intensive, and not particularly accurate. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a tool that is easy to operate and has high detection accuracy for detecting the distance between the center points of the two openings of the swing arm mounting box of an automobile subframe.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a gauge for detecting the distance between the center points of the two openings of the automotive subframe swing arm mounting box, including a crossbeam and a first center mechanism and a second center mechanism fixed at both ends of the crossbeam; the first center mechanism and the second center mechanism are each provided with a detection element that can extend and retract in a direction parallel to the crossbeam; the distance between the center points of the first center mechanism and the second center mechanism is equal to the distance between the center points of the two openings of the automotive subframe swing arm mounting box.

[0006] Furthermore, both the first and second central mechanisms include supports for mounting the test piece, with the two supports fixed to both ends of the crossbeam, and the test piece being telescopically mounted on the supports.

[0007] Furthermore, the detection element consists of two pins movably mounted on the support. The two pins on the same support are coaxially aligned and can extend and retract toward the sides of the support respectively. The extension and retraction of the two pins on the same support are synchronized and the extension and retraction distances are the same.

[0008] Furthermore, the support is provided with mounting blocks for mounting two pins respectively. The mounting blocks are provided with through holes adapted to the pins. The pins are inserted into the through holes of the corresponding mounting blocks and both ends extend out of the through holes. The support is also provided with a pusher between the two pins. The pusher is a conical structure. The opposite ends of the two pins abut against the circumferential surface of the pusher. The pusher pushes the two pins by telescoping in a direction perpendicular to the pins.

[0009] Furthermore, it also includes a compression spring fixed inside the mounting block, the compression spring being sleeved on the pin and connected to the mounting block.

[0010] Furthermore, it also includes a locking knob installed on the support, which is threaded to the support and rotatably connected to the pusher. Rotating the locking knob can push or pull the pusher in a direction perpendicular to the extension and retraction path of the pin.

[0011] Furthermore, it also includes a buffer installed on the outer end of the pin of the first central mechanism and / or the second central mechanism.

[0012] Furthermore, it also includes grips mounted on the crossbeam.

[0013] Furthermore, the gripping component is a handle fixed to the crossbeam, an anti-slip texture on the outer circumference of the crossbeam, or a groove structure on the crossbeam.

[0014] The beneficial effects of this invention are as follows: This invention sets two central mechanisms on the crossbeam, with the distance between their center points corresponding to the distance between the center points of the two openings of the swing arm mounting box. Simultaneously, retractable detection components are installed on these two central mechanisms. By using the detection component of one central mechanism against the two sides of one opening as a reference for positioning, and then detecting the gap between the detection component of the other central mechanism and the side of the other opening, the distance between the center points of the two openings is determined to be acceptable. This invention is simple to operate and requires no training to use. During testing, only the extension and retraction of the detection components needs to be controlled. This invention can quickly detect the distance between the center points of the two openings of the swing arm mounting box, saving significant manpower and testing costs, and effectively improving testing efficiency. The testing process of this invention is independent of human testing experience, effectively eliminating human testing errors and improving testing accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the two openings of the present invention in conjunction with the two openings of the automotive subframe swing arm mounting box.

[0016] The markings in the diagram are as follows: 100-crossbeam, 110-grip, 200-first central mechanism, 300-second central mechanism, 400-support, 410-pin, 420-mounting block, 430-pushing component, 440-locking knob, 510-first opening, 520-second opening, L-center distance deviation between the two openings. Detailed Implementation

[0017] To facilitate understanding of the present invention, the invention will be further described below with reference to the accompanying drawings.

[0018] In the description of this invention, it should be noted that the terms "front", "rear", "left", "right", "up", "down", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0019] like Figure 1 As shown, the inspection tool disclosed in this invention for detecting the distance between the center points of the two openings of an automotive subframe swing arm mounting box comprises a crossbeam 100 and a central mechanism. The central mechanism includes a first central mechanism 200 and a second central mechanism 300, respectively fixed to both ends of the crossbeam 100. The crossbeam 100 is used to fix the two central mechanisms and determine the detection dimensions. Therefore, the length of the crossbeam 100 should be determined based on the distance between the center points of the two openings to be detected, so that the distance between the center points of the first central mechanism 200 and the second central mechanism 300 corresponds to the designed distance between the center points of the two openings of the automotive subframe swing arm mounting box. This invention provides retractable detection elements on both the first central mechanism 200 and the second central mechanism 300, with the retraction direction of the detection elements parallel to the length direction of the crossbeam 100.

[0020] like Figure 1 As shown, when using the inspection tool described in this invention for detecting the distance between the center points of the two openings of the automotive subframe swing arm mounting box, the first center mechanism 200 is inserted into the first opening 510, and the second center mechanism 300 is inserted into the second opening 520. The two ends of the inspection piece on the first center mechanism 200 are extended and respectively abut against the two inner sides of the first opening 510. Then, the inspection piece on the second center mechanism 300 is operated so that the two ends of the inspection piece are extended, and one end of the inspection piece abuts against one inner side of the second opening 520. It is observed whether the other end of the inspection piece can simultaneously abut against the other inner side of the second opening 520. If there is a gap between the other end of the inspection piece and the other inner side of the second opening 520, the value of this gap is the deviation value L of the center distance between the two openings. If the value of L is within the designed deviation range, the center point distance between the two openings is judged to be qualified.

[0021] Specifically, the two central mechanisms used in this invention, namely the first central mechanism 200 and the second central structure 300, have the same structural composition, both including a support 400 and a detection element. The support 400 serves as the mounting base for the detection element, and the two supports 400 are respectively fixed to both ends of the crossbeam 100. The detection element is mounted on the corresponding support 400. The detection element in this invention uses two pins 410 movably mounted on the support 400. Mounting blocks 420 for mounting the pins 410 are fixed on the support 400. The mounting blocks 420 have through holes. The through holes of the two mounting blocks 420 on the same support 400 extend parallel to the length direction of the crossbeam 100, and the two through holes are axially aligned. The pins 410 are clearance-fitted with the through holes to allow the pins 410 to slide along the through holes. The two pins 410 are inserted into the corresponding through holes, making the two pins 410 on the same support 400 coaxially aligned. In this invention, a pusher 430 is used to drive the pins 410 to extend and retract, such as... Figure 1 As shown, the pusher 430 has a conical structure and is located in the middle of the support 400. The opposite ends of the two pins 410 on the same support 400 abut against the circumferential surface of the pusher 430, pushing the pusher 410 in a direction perpendicular to the length of the pins 410. Since the circumferential surface of the pusher 410 is inclined, it can push the two pins 410 to extend to both sides of the support 400, thereby realizing the push of the two pins 410. Since the movement of the two pins 410 is controlled by the pusher 410 at the same time, the extension and retraction of the two pins 410 on the same support 400 are synchronized and the extension and retraction distances are the same.

[0022] After the two pins 410 are pushed outward by the pusher 410, a return function is needed to retract the pins 410. In this invention, a compression spring is used to achieve this. Specifically, a compression spring is installed in the through hole corresponding to the pin 410 on the mounting block 420. The compression spring is sleeved on the pin 410, and its two ends are connected to the pin 410 and the mounting block 420, respectively. After the two pins 410 are pushed outward by the pusher 430, the compression spring is compressed. When the pusher 430 is withdrawn, the two pins 410 are no longer pushed by the pusher 430. Under the elastic force of the compression spring, they retract and abut against the circumferential surface of the pusher 430 again. Therefore, the extension length of the pins 410 is limited by the movement of the pusher 430.

[0023] like Figure 1As shown, the movement of the pusher 430 in this invention is achieved by the locking knob 440. A threaded hole is provided on the support 400 to engage with the locking knob 440. After the locking knob 440 passes through the threaded hole, it is rotatably connected to the pusher 430. When the locking knob 440 is rotated, the pusher 430 is pushed forward. When the locking knob 440 is reversed, the pusher 430 is pulled backward, thereby realizing the movement of the pusher 430 in a direction perpendicular to the extension path of the pin 410.

[0024] In this invention, both the first central mechanism 200 and the second central mechanism 300 can be used as reference parts during testing. Since the pin 410 on the central mechanism serving as the reference part needs to abut against the two sides of the opening, in order to avoid damage to both, a buffer can be installed on the outer end of the pin 410 of the central mechanism serving as the reference part for protection. The buffer can be made of soft materials such as rubber, plastic, silicone, or cloth.

[0025] To facilitate operation by staff, the present invention also provides a grip 110 on the crossbeam 100. The form of the grip 110 is not limited, and it can be a handle fixed on the crossbeam 100, an anti-slip texture on the outer circumference of the crossbeam 100, or a groove structure on the crossbeam 100.

Claims

1. A gauge for detecting the distance between the center points of the two openings of a car subframe swing arm mounting box, characterized in that: It includes a crossbeam (100) and a first central mechanism (200) and a second central mechanism (300) fixed at both ends of the crossbeam (100); the first central mechanism (200) and the second central mechanism (300) are each provided with a detection element that can extend and retract in a direction parallel to the crossbeam (100); the distance between the center points of the first central mechanism (200) and the second central mechanism (300) is equal to the distance between the center points of the two openings of the vehicle subframe swing arm mounting box; Both the first central mechanism (200) and the second central mechanism (300) include supports (400) for mounting the test piece. The two supports (400) are respectively fixed at both ends of the crossbeam (100), and the test piece is telescopically mounted on the supports (400). The detection element consists of two pins (410) movably mounted on the support (400). The two pins (410) on the same support (400) are coaxially aligned and can extend and retract toward both sides of the support (400) respectively. The extension and retraction actions of the two pins (410) on the same support (400) are synchronized and the extension and retraction distances are the same. The support (400) is provided with mounting blocks (420) for mounting two pins (410) respectively. The mounting blocks (420) are provided with through holes adapted to the pins (410). The pins (410) are inserted into the through holes of the corresponding mounting blocks (420) and both ends extend out of the through holes. The support (400) is also provided with a pusher (430) located between the two pins (410). The pusher (430) is a conical structure. The opposite ends of the two pins (410) abut against the circumferential surface of the pusher (430). The pusher (430) pushes the two pins (410) by telescoping in a direction perpendicular to the pins (410). It also includes a buffer installed on the outer end of the pin (410) of the first central mechanism (200) and / or the second central mechanism (300).

2. The inspection tool for detecting the distance between the center points of the two openings of the automotive subframe swing arm mounting box as described in claim 1, characterized in that: It also includes a compression spring fixed inside the mounting block (420), the compression spring being sleeved on the pin (410) and connected to the mounting block (420).

3. The inspection tool for detecting the distance between the center points of the two openings of the automotive subframe swing arm mounting box as described in claim 1, characterized in that: It also includes a locking knob (440) mounted on the support (400), the locking knob (440) being threadedly connected to the support (400) and rotatably connected to the pusher (430), rotating the locking knob (440) can push and pull the pusher (430) in a direction perpendicular to the telescopic path of the pin (410).

4. The inspection tool for detecting the distance between the center points of the two openings of the automotive subframe swing arm mounting box as described in any one of claims 1 to 3, characterized in that: It also includes a grip (110) provided on the crossbeam (100).

5. The inspection tool for detecting the distance between the center points of the two openings of the automotive subframe swing arm mounting box as described in claim 4, characterized in that: The grip (110) is a handle fixed on the crossbeam (100), an anti-slip texture on the outer circumference of the crossbeam (100), or a groove structure on the crossbeam (100).

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