A fixture for detecting automobile protective bracket

Abstract

The present invention discloses a jig for detecting automobile protective brackets, including a jig fixing frame; a support base, which is fixedly arranged on the jig fixing frame to support the bottom of the automobile protective bracket; a first top pressing assembly, which is fixedly arranged on the jig fixing frame to press and fix the automobile protective bracket on the support base from the top; a second top pressing assembly, which is fixedly arranged on the jig fixing frame to press and fix the automobile protective bracket on the support base from the top; a flanging pressing assembly, which is fixedly arranged on the jig fixing frame to provide downward pressing force to the automobile protective bracket; and a side pressing assembly, which is fixedly arranged on the jig fixing frame to press and fix the automobile protective bracket on the support base from the side. The present application has many advantages such as simple structure, convenient operation, accurate positioning and stable clamping, and is suitable for batch detection of automobile protective brackets.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts detection equipment, and in particular to a fixture for detecting automobile protective brackets. Background Art

[0002] The automobile industry continues to develop at a high speed, and parts are constantly being improved during the development and manufacturing process. Automobile manufacturers need to test the size, quality, surface and other factors of the improved parts to ensure their factory qualification. As a component that actively relieves the impact force on passengers and passers-by when a car collides, the car bumper is widely installed at the head and tail of the car, and the car protective bracket is a connector that connects the car bumper and the body structure; when the car protective bracket is produced, it is necessary to use a detection pin to check the hole position opened on it to avoid deviations in the support points and installation points on the car protective bracket, thereby ensuring its accuracy during installation and strength in the event of a collision. Since the size of the car protective bracket is not convenient for inspectors to directly inspect it, how to design a fixture for inspecting the car protective bracket is a technical problem we need to solve. Summary of the invention

[0003] In view of the deficiencies existing in the above-mentioned technologies, the present invention provides a jig for detecting automobile protective brackets.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A jig for detecting a protective bracket of an automobile, comprising: a fixture fixing frame, which is fixedly seated on a working ground; a support base, which is fixedly arranged on the fixture fixing frame to support the bottom of the automobile protective bracket, and the top of the support base is formed with a special-shaped fitting surface that matches the bottom surface of the automobile protective bracket; a first top pressing component, which is fixedly arranged on the fixture fixing frame to press and fix the automobile protective bracket to the support base from the top; a second top pressing component, which is fixedly arranged on the fixture fixing frame to press and fix the automobile protective bracket to the support base from the top; a flange pressing component, which is fixedly arranged on the fixture fixing frame to provide a downward pressing force on the automobile protective bracket; and a side pressing component, which is fixedly arranged on the fixture fixing frame to press and fix the automobile protective bracket to the support base from the side;

[0006] Among them, the bottom side of the automobile protection bracket is formed with a flange, and the flange pressing assembly can be pressed on the top surface of the flange; the top of the automobile protection bracket is provided with a plurality of mounting holes, and the bottom of the support base is provided with detection holes corresponding to the positions of the plurality of mounting holes, and the detection end of the detection pin can pass through the mounting hole and be inserted into the detection hole.

[0007] Preferably, the first top pressing assembly includes a first pressing fixed base, which is fixedly arranged on the inspection fixture fixing frame, a first pressing support plate and a second pressing support plate are fixed oppositely to each other on the top of the first pressing fixed base, a first threaded hole is provided on the first pressing support plate; a first rotating pressing plate is pivotally connected between the first pressing support plate and the second pressing support plate through a first hinge rod; a first positioning hole is provided on the side of the first rotating pressing plate; and a side positioning pin, which is screwed and fixed in the first threaded hole, and the side positioning pin can be inserted into the first positioning hole to achieve relative position fixing between the first rotating pressing plate and the first pressing support plate;

[0008] A first top pressing plate is fixed to one end of the first rotating top pressing plate, a second top pressing plate is fixed to one side of the first rotating top pressing plate, and a flip handle is fixed to the top of the first rotating top pressing plate.

[0009] Preferably, a second positioning hole is formed on the top of the first rotating pressing plate, and a third positioning hole is formed on the top of the first pressing and fixing base, and a top positioning pin can be inserted into the second positioning hole and the third positioning hole in sequence to achieve relative position fixing between the first rotating pressing plate and the first pressing support plate;

[0010] A first limiting folding plate for limiting the flipping angle of the first rotating top pressing plate is fixed on the top of the first pressing and fixing base.

[0011] Preferably, the side locating pin includes a shell having an installation cavity formed therein, and one end of which is formed with an external threaded portion that can be screwed and fixed to the first threaded hole; a connecting pin rod, which is inserted in the shell, one end of the connecting pin rod is fixedly connected to a handle, the other end of the connecting pin rod is fixedly connected to a pin head that can be inserted into the first positioning hole, and the middle part of the connecting pin rod is fixedly connected to a guide block that is in sliding contact with the installation cavity; and a spring, which is sleeved on the connecting pin rod, one end of the spring abuts against the guide block, and the other end of the spring abuts against the inner wall of the installation cavity.

[0012] Preferably, the flanging pressing assembly includes a flanging pressing fixed seat fixedly arranged on the fixture fixed frame; a U-shaped flanging pressing support plate fixedly installed on the top of the flanging pressing fixed seat; a flanging pressing plate pivotally connected to the U-shaped flanging pressing support plate through a first rotating shaft, and a flanging pressing block is fixedly installed at the end of the flanging pressing plate; a first wrench plate pivotally connected to one outer side of the U-shaped flanging pressing support plate through a second rotating shaft; a second wrench plate pivotally connected to the other outer side of the U-shaped flanging pressing support plate through a second rotating shaft, and the tops of the second wrench plate and the first wrench plate are both welded to a third wrench plate; and a linkage folding plate, one end of which is pivotally connected to the flanging pressing plate through a third rotating shaft, and the other end of which is pivotally connected between the first wrench plate and the second wrench plate.

[0013] Wherein, a linkage limiting block is formed at one end of the linkage folding plate, and a flipping limiting block for limiting the rotation angle of the first wrench plate is formed on the side of the U-shaped flanging pressing support plate; an inclined surface part is formed on the top of the U-shaped flanging pressing support plate.

[0014] Preferably, a pressing block mounting hole is formed at the end of the flanging pressing plate.

[0015] A screw rod capable of being inserted into the pressing block mounting hole is fixed on the top of the flanging pressing block, and positioning nuts are screwed on the screw rods on both the upper and lower sides of the flanging pressing plate, and a retaining plate is sleeved on the screw rods between the positioning nuts and the flanging pressing plate.

[0016] Preferably, the second top pressing assembly includes a top pressing heightening frame fixedly arranged on the fixture fixed frame; a second pressing fixed base fixed on the top of the top pressing heightening frame, and a third pressing support plate and a fourth pressing support plate are oppositely fixed on the top of the second pressing fixed base, and a first pin mounting hole is formed on the third pressing support plate; a second rotating top pressing plate pivotally connected between the third pressing support plate and the fourth pressing support plate through a second hinge rod, and a top pressing positioning hole is formed on the second rotating top pressing plate; and a rotary pin rotatably installed in the first pin mounting hole, and the rotary pin can be inserted into the top pressing positioning hole to realize the relative position fixation between the second rotating top pressing plate and the third pressing support plate.

[0017] Preferably, a spiral chute is formed on the rotary pin; a pin block is formed at one end of the rotary pin; and a lever is fixed on the side of the rotary pin.

[0018] A second threaded hole communicating with the first latch mounting hole is formed on the top of the third pressing support plate, a latch limiting rod is threadedly fixed in the second threaded hole, a ball bearing is rollably mounted on the bottom of the latch limiting rod; a hexagon socket is formed on the top of the latch limiting rod;

[0019] The ball bearing is rollingly installed in the spiral slide groove, and the pin block can be inserted into or pulled out of the top-pressing positioning hole by pulling the lever.

[0020] Preferably, the side pressing assembly includes a side pressing fixing seat, which is fixedly arranged on the inspection fixture fixing frame; a side flip support frame, which is fixed to the top of the side pressing fixing seat, a flip groove is formed on the side flip support frame, and a fourth positioning hole is provided at the bottom of the flip groove; a rotating side pressure plate, which is pivotally connected to the side flip support frame through a flip axis, and a fifth positioning hole is provided on the rotating side pressure plate; a side pressing plate, which is fixed to one end of the rotating side pressure plate to be used for pressing and fixing the vehicle protection bracket to the support base from the side; and a side pressing locating pin, which can be inserted into the fifth positioning hole and the fourth positioning hole in sequence to achieve relative position fixing of the rotating side pressure plate and the side flip support frame.

[0021] Preferably, a fixing groove is formed at one end of the flip shaft, and a third threaded hole is opened at the top of the side flip support frame; the stud can be threadedly installed in the third threaded hole, and the bottom of the stud can be inserted and abutted in the fixing groove, so as to fix the flip shaft on the side flip support frame.

[0022] Preferably, a second limiting folding plate for limiting the flipping angle of the rotating side pressure plate is installed at one end of the side flip support frame.

[0023] Compared with the prior art, the present invention has the following beneficial effects: the jig for detecting the automobile protective bracket provided by the present invention can press and fix the automobile protective bracket on the support base from the top through the first top pressing assembly and the second top pressing assembly, can press and fix the flange of the automobile protective bracket on the support base through the flange pressing assembly, and can press and fix the automobile protective bracket on the support base from the side through the side pressing assembly, so as to facilitate the use of the detection pin to detect the hole position of the mounting hole. The present application has many advantages such as simple structure, convenient operation, accurate positioning and stable clamping, and is suitable for batch detection of automobile protective brackets. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the present invention when the automobile protection bracket is installed;

[0025] Figure 2It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 — Figure 4 It is a structural schematic diagram of the first top pressing assembly in the present invention;

[0027] Figure 5 It is a structural cross-sectional view of the side positioning pin in the present invention;

[0028] Figure 6 — Figure 7 It is a structural schematic diagram of the flanging pressing assembly in the present invention;

[0029] Figure 8 — Fig. 9 It is a structural schematic diagram of the second top pressing assembly in the present invention;

[0030] Fig.10 — Fig.11 It is a schematic structural diagram of the side pressing assembly in the present invention.

[0031] In the figure: 1. Fixture fixing frame; 2. Support base; 3. Automobile protection bracket; 4. First top pressing assembly; 8. Second top pressing assembly; 5. Flanging pressing assembly; 7. Side pressing assembly; 30. Mounting hole; 20. Detection hole; 9. Detection pin; 40. First pressing fixing base; 411. First pressing support plate; 412. Second pressing support plate; 410. First threaded hole; 42. First rotating top pressing plate; 413. First hinge rod; 424. First positioning hole; 44. Side positioning pin; 422. First top pressing plate; 423. Second top pressing plate; 421. Flip handle; 420. Second positioning hole; 43. Top positioning pin; 45. First limiting flap; 440. Housing; 441. External thread part; 443. Linking pin rod; 445. Handle; 444. Pin head; 442. Guide block; 446. Spring; 50. Flanging pressing fixing seat; 511. U-shaped flanging pressing support plate; 52. Flanging pressing plate; 572. First rotating shaft; 56. Flanging pressing block; 531. First wrench plate; 571. Second rotating shaft; 532. Second wrench plate; 533. Third wrench plate; 54. Linking flap; 573. Third rotating shaft; 574. Fourth rotating shaft; 541. Linking limiting block; 512. Flip limiting block; 510. Inclined surface part; 551. Screw; 553. Positioning nut; 552. Retaining plate; 80. Top pressing heightening frame; 81. Second pressing fixing base; 811. Third pressing support plate; 812. Fourth pressing support plate; 810. First pin mounting hole; 82. Second rotating top pressing plate; 813. Second hinge rod; 820. Top pressing positioning hole; 83. Rotary pin; 830. Spiral chute; 832. Pin block; 831. Lever; 814. Second threaded hole; 84. Pin limiting rod; 85. Ball; 840. Hexagonal socket; 70. Side pressing fixing seat; 71. Side flip support frame; 710. Flip groove; 711. Fourth positioning hole; 72. Rotary side pressing plate; 721. Flip shaft; 720. Fifth positioning hole; 74. Side pressing plate; 73. Side pressing positioning pin; 722. Fixed groove; 76. Stud; 75 Second limiting flap. Detailed implementation manners

[0032] The following further elaborates on the present invention with reference to the accompanying drawings, enabling those skilled in the art to implement it based on the description in the specification.

[0033] As Figure 1 — Fig.11 shown, the present invention provides a jig for detecting an automobile protection bracket, including:

[0034] A fixture fixing frame 1, whose fixed seat is placed on the working ground;

[0035] A support base 2, which is fixedly arranged on the inspection fixture fixing frame 1, and is used to support the bottom of the automobile protection bracket 3, and the top of the support base 2 is formed with a special-shaped fitting surface that matches the bottom surface of the automobile protection bracket 3;

[0036] A first top pressing assembly 4, which is fixedly disposed on the inspection fixture fixing frame 1, and is used to press and fix the automobile protection bracket 3 on the supporting base 2 from the top;

[0037] A second top pressing assembly 8, which is fixedly disposed on the inspection fixture fixing frame 1, and is used to press and fix the automobile protection bracket 3 on the supporting base 2 from the top;

[0038] A flange pressing assembly 5, which is fixedly disposed on the inspection fixture fixing frame 1, and is used to provide a downward pressing force to the automobile protection bracket 3; and

[0039] A side pressing assembly 7, which is fixedly arranged on the inspection fixture fixing frame 1, and is used to press and fix the automobile protection bracket 3 on the supporting base 2 from the side;

[0040] Among them, the bottom side of the automobile protection bracket 3 is formed with a flange, and the flange pressing assembly 5 can be pressed on the top surface of the flange; the top of the automobile protection bracket 3 is provided with a plurality of mounting holes 30, and the bottom of the support base 2 is provided with detection holes 20 corresponding to the positions of the plurality of mounting holes 30, and the detection end of the detection pin 9 can pass through the mounting hole 30 and be inserted in the detection hole 20.

[0041] As an embodiment of the present invention, the first top pressing component 4 includes

[0042] A first pressing and fixing base 40 is fixedly disposed on the gauge fixing frame 1, a first pressing support plate 411 and a second pressing support plate 412 are oppositely fixed on the top of the first pressing and fixing base 40, and a first threaded hole 410 is formed on the first pressing support plate 411;

[0043] A first rotating pressing plate 42 is pivotally connected between the first pressing support plate 411 and the second pressing support plate 412 via a first hinge rod 413; a first positioning hole 424 is formed on a side of the first rotating pressing plate 42; and

[0044] A side positioning pin 44, which is screwed and fixed in the first threaded hole 410, and the side positioning pin 44 can be inserted into the first positioning hole 424 to achieve relative position fixing between the first rotating pressing plate 42 and the first pressing support plate 411;

[0045] A first top pressing plate 422 is fixed to one end of the first rotating pressing plate 42 , a second top pressing plate 423 is fixed to one side of the first rotating pressing plate 42 , and a flip handle 421 is fixed to the top of the first rotating pressing plate 42 .

[0046] As an embodiment of the present invention, a second positioning hole 420 is formed on the top of the first rotating pressing plate 42, and a third positioning hole is formed on the top of the first pressing and fixing base 40, and a top positioning pin 43 can be inserted into the second positioning hole 420 and the third positioning hole in sequence to achieve relative position fixing between the first rotating pressing plate 42 and the first pressing support plate 411;

[0047] A first limiting folding plate 45 for limiting the turning angle of the first rotating pressing plate 42 is fixed on the top of the first pressing and fixing base 40 .

[0048] As an embodiment of the present invention, the side positioning pin 44 includes

[0049] The housing 440 has a mounting cavity formed therein and an external threaded portion 441 formed at one end thereof that can be screwed and fixed to the first threaded hole 410;

[0050] A linkage pin 443 is inserted into the housing 440, a handle 445 is fixedly connected to one end of the linkage pin 443, a pin head 444 that can be inserted into the first positioning hole 424 is fixedly connected to the other end of the linkage pin 443, and a guide block 442 that is in sliding contact with the installation cavity is fixedly connected to the middle of the linkage pin 443; and

[0051] A spring 446 is sleeved on the linkage pin 443 , one end of the spring 446 abuts against the guide block 442 , and the other end of the spring 446 abuts against the inner wall of the installation cavity.

[0052] As an embodiment of the present invention, the flange pressing assembly 5 includes

[0053] A flange pressing fixing seat 50, which is fixedly arranged on the inspection fixture fixing frame 1;

[0054] A U-shaped flange pressing support plate 511, which is fixedly mounted on the top of the flange pressing fixing seat 50;

[0055] The flange pressing plate 52 is pivotally connected to the U-shaped flange pressing support plate 511 via a first rotating shaft 572 , and a flange pressing block 56 is fixedly mounted on the end of the flange pressing plate 52 ;

[0056] A first wrench plate 531, which is pivotally connected to an outer side of the U-shaped flange pressing support plate 511 through a second rotating shaft 571;

[0057] A second wrench plate 532 is pivotally connected to the other outer side of the U-shaped flanging pressing support plate 511 through a second rotating shaft 571. The tops of the second wrench plate 532 and the first wrench plate 531 are both welded to a third wrench plate 533; and

[0058] A linkage folding plate 54, one end of which is pivotally connected to the flanging pressing plate 52 through a third rotating shaft 573, and the other end of which is pivotally connected between the first wrench plate 531 and the second wrench plate 532 through a fourth rotating shaft 574;

[0059] Wherein, a linkage limiting block 541 is formed at one end of the linkage folding plate 54, and a flipping limiting block 512 for limiting the rotation angle of the first wrench plate 531 is formed at the side of the U-shaped flanging pressing support plate 511; an inclined surface portion 510 is formed at the top of the U-shaped flanging pressing support plate 511.

[0060] As an embodiment of the present invention, a pressing block mounting hole is provided at the end of the flanging pressing plate 52;

[0061] A screw 551 capable of being inserted into the pressing block mounting hole is fixed at the top of the flanging pressing block 56. Positioning nuts 553 are screwed onto the screws 551 on both the upper and lower sides of the flanging pressing plate 52, and a retaining plate 552 is sleeved on the screws 551 between the positioning nuts 553 and the flanging pressing plate 52.

[0062] As an embodiment of the present invention, the second top pressing assembly 8 includes

[0063] A top pressing heightening frame 80, which is fixedly arranged on the fixture fixing frame 1;

[0064] A second pressing fixing base 81, which is fixed on the top of the top pressing heightening frame 80. Oppositely fixed on the top of the second pressing fixing base 81 are a third pressing support plate 811 and a fourth pressing support plate 812. A first pin mounting hole 810 is provided in the third pressing support plate 811;

[0065] A second rotating top pressing plate 82, which is pivotally connected between the third pressing support plate 811 and the fourth pressing support plate 812 through a second hinge rod 813. A top pressing positioning hole 820 is provided in the second rotating top pressing plate 82; and

[0066] A rotary pin 83, which is rotatably installed in the first pin mounting hole 810 and can be inserted into the top pressing positioning hole 820 to fix the relative positions between the second rotating top pressing plate 82 and the third pressing support plate 811.

[0067] As an embodiment of the present invention, a spiral groove 830 is formed on the rotary latch 83; a pin block 832 is formed at one end of the rotary latch 83; a lever 831 is fixed to the side of the rotary latch 83;

[0068] A second threaded hole 814 communicating with the first latch mounting hole 810 is formed at the top of the third pressing support plate 811, a latch limiting rod 84 is threadedly fixed in the second threaded hole 814, a ball 85 is rollably mounted at the bottom of the latch limiting rod 84; a hexagon socket 840 is formed at the top of the latch limiting rod 84;

[0069] The ball 85 is rollingly installed in the spiral slide groove 830 , and the pin block 832 can be inserted into or pulled out of the top-pressing positioning hole 820 by pulling the lever 831 .

[0070] As an embodiment of the present invention, the side pressing assembly 7 includes:

[0071] A side pressing fixing seat 70, which is fixedly arranged on the inspection fixture fixing frame 1;

[0072] A side flip support frame 71, which is fixed to the top of the side pressing fixing seat 70, and a flip groove 710 is formed on the side flip support frame 71, and a fourth positioning hole 711 is opened at the bottom of the flip groove 710;

[0073] A rotating side pressure plate 72, which is pivotally connected to the side flip support frame 71 via a flip shaft 721, and a fifth positioning hole 720 is opened on the rotating side pressure plate 72;

[0074] A side pressing plate 74, which is fixed to one end of the rotating side pressing plate 72, so as to press and fix the automobile protection bracket 3 on the supporting base 2 from the side; and

[0075] The side pressing positioning pin 73 can be inserted into the fifth positioning hole 720 and the fourth positioning hole 711 in sequence to achieve the relative position fixing of the rotating side pressure plate 72 and the side flip support frame 71 .

[0076] As an embodiment of the present invention, a fixing groove 722 is formed at one end of the flip shaft 721, and a third threaded hole is opened at the top of the side flip support frame 71; the stud 76 can be threadedly installed in the third threaded hole, and the bottom of the stud 76 can be inserted and abutted in the fixing groove 722, so as to fix the flip shaft 721 on the side flip support frame 71.

[0077] As an embodiment of the present invention, a second limiting folding plate 75 for limiting the turning angle of the rotating side pressure plate 72 is installed at one end of the side turning support frame 71 .

[0078] The working principle of the fixture used to detect automobile protective brackets:

[0079] The inspector gently places the automobile protection bracket 3 on the top of the support base 2, and presses and fixes the automobile protection bracket 3 on the support base 2 from the top through the first top pressing component 4 and the second top pressing component 8, presses and fixes the flange of the automobile protection bracket 3 on the support base 2 through the flange pressing component 5, and presses and fixes the automobile protection bracket 3 on the support base 2 from the side through the side pressing component 7, so as to use the detection pin 9 to detect the hole position of the mounting hole 30. When the detection pin 9 can pass through the mounting hole 30 and be smoothly inserted into the detection hole 20, it indicates that the mounting hole 30 is a qualified hole position.

[0080] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A fixture for detecting automobile protective brackets, characterized in that: include: A check fixture fixing frame (1) is fixedly seated on the working ground; A support base (2) is fixedly arranged on the inspection fixture fixing frame (1) to support the bottom of the automobile protection bracket (3); the top of the support base (2) is formed with a special-shaped fitting surface that matches the bottom surface of the automobile protection bracket (3); A first top pressing assembly (4) which is fixedly arranged on the inspection fixture fixing frame (1) and is used to press and fix the automobile protection bracket (3) on the supporting base (2) from the top; A second top pressing assembly (8) is fixedly arranged on the inspection fixture fixing frame (1) and is used to press and fix the automobile protection bracket (3) on the supporting base (2) from the top; A flange pressing assembly (5) fixedly arranged on the inspection fixture fixing frame (1) to provide a downward pressing force on the automobile protective bracket (3); and A side pressing assembly (7) fixedly arranged on the inspection fixture fixing frame (1) and used for pressing and fixing the automobile protection bracket (3) on the supporting base (2) from the side; The bottom side of the automobile protection bracket (3) is formed with a flange, and the flange pressing assembly (5) can be pressed on the top surface of the flange; the top of the automobile protection bracket (3) is provided with a plurality of mounting holes (30), the bottom of the support base (2) is provided with detection holes (20) corresponding to the positions of the plurality of mounting holes (30), and the detection end of the detection pin (9) can pass through the mounting hole (30) and be inserted into the detection hole (20); The first top pressing assembly (4) comprises: A first pressing and fixing base (40) is fixedly arranged on the inspection fixture fixing frame (1), a first pressing support plate (411) and a second pressing support plate (412) are fixed oppositely to each other on the top of the first pressing and fixing base (40), and a first threaded hole (410) is formed on the first pressing support plate (411); A first rotating pressing plate (42) is pivotally connected between the first pressing support plate (411) and the second pressing support plate (412) via a first hinge rod (413); a first positioning hole (424) is provided on a side of the first rotating pressing plate (42); and A side positioning pin (44) which is threadedly fixed in the first threaded hole (410), and the side positioning pin (44) can be inserted into the first positioning hole (424) to achieve relative position fixation between the first rotating pressing plate (42) and the first pressing support plate (411); Wherein, a first top pressing plate (422) is fixed to one end of the first rotating top pressing plate (42), a second top pressing plate (423) is fixed to one side of the first rotating top pressing plate (42), and a flip handle (421) is fixed to the top of the first rotating top pressing plate (42); The side positioning pin (44) comprises: A housing (440) having an installation cavity formed therein and an external threaded portion (441) formed at one end thereof that can be threadedly fixed to the first threaded hole (410); a linkage pin (443) inserted in the housing (440), one end of the linkage pin (443) being fixedly connected to a handle (445), the other end of the linkage pin (443) being fixedly connected to a pin head (444) capable of being inserted into the first positioning hole (424), and the middle portion of the linkage pin (443) being fixedly connected to a guide block (442) that is in sliding contact with the installation cavity; and a spring (446) which is sleeved on the linkage pin (443), one end of the spring (446) abutting against the guide block (442), and the other end of the spring (446) abutting against the inner wall of the installation cavity; The flange pressing assembly (5) comprises: A flange pressing fixing seat (50) which is fixedly arranged on the inspection tool fixing frame (1); A U-shaped flange pressing support plate (511), which is fixedly mounted on the top of the flange pressing fixing seat (50); A flanging pressing plate (52) is pivotally connected to the U-shaped flanging pressing support plate (511) via a first rotating shaft (572), and a flanging pressing block (56) is fixedly mounted on the end of the flanging pressing plate (52); A first wrench plate (531) pivotally connected to an outer side of the U-shaped flange pressing support plate (511) via a second rotating shaft (571); A second wrench plate (532) is pivotally connected to the other outer side of the U-shaped flange pressing support plate (511) via a second rotating shaft (571), and the top of the second wrench plate (532) and the top of the first wrench plate (531) are both welded to a third wrench plate (533); and A linked folding plate (54), one end of which is pivotally connected to the flange pressing plate (52) via a third rotating shaft (573), and the other end of which is pivotally connected between the first wrench plate (531) and the second wrench plate (532) via a fourth rotating shaft (574); Wherein, a linkage limit block (541) is formed at one end of the linkage folding plate (54), and a flip limit block (512) for limiting the rotation angle of the first wrench plate (531) is formed on the side of the U-shaped flange pressing support plate (511); and a sloped portion (510) is formed on the top of the U-shaped flange pressing support plate (511); The second top pressing assembly (8) comprises: A top pressing and raising frame (80) which is fixedly arranged on the inspection tool fixing frame (1); A second pressing fixed base (81) is fixed to the top of the top pressing heightening frame (80), a third pressing support plate (811) and a fourth pressing support plate (812) are fixed oppositely to the top of the second pressing fixed base (81), and a first latch mounting hole (810) is provided on the third pressing support plate (811); A second rotating pressing plate (82) is pivotally connected between the third pressing support plate (811) and the fourth pressing support plate (812) via a second hinge rod (813), and a pressing positioning hole (820) is provided on the second rotating pressing plate (82); and A rotary latch (83) rotatably mounted in the first latch mounting hole (810), wherein the rotary latch (83) can be inserted into the pressing positioning hole (820) to achieve relative position fixation between the second rotary pressing plate (82) and the third pressing support plate (811); The side pressing assembly (7) comprises: A side pressing fixing seat (70) fixedly arranged on the inspection tool fixing frame (1); A side flip support frame (71) is fixed to the top of the side pressing fixing seat (70), a flip groove (710) is formed on the side flip support frame (71), and a fourth positioning hole (711) is formed at the bottom of the flip groove (710); A rotating side pressure plate (72) is pivotally connected to the side flip support frame (71) via a flip shaft (721), and a fifth positioning hole (720) is provided on the rotating side pressure plate (72); A side pressing plate (74) fixed to one end of the rotating side pressing plate (72) for pressing and fixing the automobile protection bracket (3) on the supporting base (2) from the side; and A side pressing positioning pin (73) which can be inserted into the fifth positioning hole (720) and the fourth positioning hole (711) in sequence to achieve relative position fixation of the rotating side pressure plate (72) and the side flip support frame (71); A second positioning hole (420) is provided at the top of the first rotating pressing plate (42), and a third positioning hole is provided at the top of the first pressing and fixing base (40), and a top positioning pin (43) can be inserted into the second positioning hole (420) and the third positioning hole in sequence to achieve relative position fixation between the first rotating pressing plate (42) and the first pressing support plate (411); A first limiting folding plate (45) for limiting the turning angle of the first rotating top pressing plate (42) is fixed on the top of the first pressing fixed base (40); The rotary latch (83) is provided with a spiral groove (830); one end of the rotary latch (83) is formed with a pin block (832); a lever (831) is fixed to the side of the rotary latch (83); A second threaded hole (814) communicating with the first latch mounting hole (810) is formed at the top of the third pressing support plate (811); a latch limiting rod (84) is threadedly fixed in the second threaded hole (814); a ball (85) is rollably mounted at the bottom of the latch limiting rod (84); The ball (85) is rollingly installed in the spiral slide groove (830), and the pin block (832) can be inserted into or pulled out of the top pressure positioning hole (820) by pulling the lever (831).

2. The jig for detecting automobile protective brackets according to claim 1, characterized in that: The end of the flange pressing plate (52) is provided with a pressing block mounting hole; A screw rod (551) capable of being inserted into the mounting hole of the pressing block is fixed on the top of the flanging pressing block (56), positioning nuts (553) are screwed onto the screw rods (551) located on the upper and lower sides of the flanging pressing plate (52), and a baffle plate (552) is mounted on the screw rods (551) located between the positioning nuts (553) and the flanging pressing plate (52).

3. The jig for detecting automobile protective brackets according to claim 1, characterized in that: A fixing groove (722) is formed at one end of the flip shaft (721), and a third threaded hole is formed at the top of the side flip support frame (71); the stud (76) can be threadedly installed in the third threaded hole, and the bottom of the stud (76) can be inserted and abutted against the fixing groove (722), so as to fix the flip shaft (721) on the side flip support frame (71).

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