An assembly inspection tool for realizing three state thresholds and its inspection method

Abstract

The present invention relates to an assembly inspection tool for realizing three-state thresholds and a detection method thereof, comprising a base frame and a base plate, wherein the base plate is fixed to the middle part of the upper surface of the frame, and further comprising a threshold mounting mechanism, a left profile detection mechanism, a right profile detection mechanism and an auxiliary detection mechanism, wherein the threshold mounting mechanism is fixed to one side of an outer wall of the base plate and is used to fix and install the threshold, the left profile detection mechanism is fixed to one side of the outer wall of the base plate close to the threshold mounting mechanism, the right profile detection mechanism is fixed to one side of the outer wall of the base plate close to the left profile detection mechanism, and the auxiliary detection mechanism is fixed to the lower end of one side of the outer wall of the base plate close to the right profile detection mechanism; the inspection tool provided by the present invention can complete the profile detection work of three different thresholds of Great Wall P05 automobile, so that enterprises no longer need to use three different inspection tools to complete the detection work of three different thresholds, which greatly saves the inspection tool development cost of the enterprise, improves the adaptability of the inspection tool, and can reduce the floor space occupied by the inspection tool, making it convenient for enterprises to use.

Description

Technical Field

[0001] The invention relates to the technical field of automobile door sill assembly inspection tools, and in particular to an assembly inspection tool for realizing three-state door sills and a detection method thereof. Background Art

[0002] At present, automobile exterior products are gradually developing in the direction of vehicle segmentation and differentiation to highlight different vehicle styles. At present, the Great Wall P05 project obtained by our company is divided into off-road version and passenger version, and the matching threshold assembly products have three states: electric version, off-road version, and fixed version. This requires suppliers to invest more molds and fixtures, and this type of tooling equipment will also occupy a large site area, inevitably resulting in high development costs, low site utilization, and difficulty in distinguishing fixture states. In order to reduce the development cost of the P05 threshold assembly fixture during the development process, combined with the fixed installation of the threshold assembly, the differences in the shapes of the threshold assembly in various areas, and the product characteristics of the corresponding areas of each styling threshold, the three threshold assembly fixtures are considered for integrated solution design to reduce the fixture development cost and reduce the temporary use of the site.

[0003] Therefore, it is necessary to provide a new inspection tool for realizing the three-state threshold assembly to solve the above technical problems. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an assembly inspection fixture and an inspection method thereof for realizing three state thresholds.

[0005] The present invention provides a checking fixture for realizing a threshold assembly in three states, comprising a base frame and a base plate, wherein the base plate is fixed to the middle part of the upper surface of the frame, and further comprising a threshold mounting mechanism, a left profile detection mechanism, a right profile detection mechanism and an auxiliary detection mechanism, wherein the threshold mounting mechanism is fixed to one side of the outer wall of the base plate and is used for fixing and mounting the threshold, the left profile detection mechanism is fixed to one side of the outer wall of the base plate close to the threshold mounting mechanism, the right profile detection mechanism is fixed to one side of the outer wall of the base plate close to the left profile detection mechanism, the auxiliary detection mechanism is fixed to the lower end of the outer wall of the base plate close to the right profile detection mechanism, the threshold mounting mechanism comprises a first connecting seat, a horizontal bar, a hinge structure hole pin and a first pneumatic clamp, four first connecting seats are equidistantly fixed to the upper end of one side of the outer wall of the base plate, the horizontal bar is fixed to one side of the four first connecting seats away from the base plate, a plurality of hinge structure hole pins are all plugged and fixed to the lower end of the outer wall of the horizontal bar, and a plurality of first pneumatic clamps are all fixed to the upper end of the outer wall of the horizontal bar.

[0006] Preferably, the threshold mounting mechanism also includes a second connecting seat, a positioning block and a second pneumatic clamp, the second connecting seat is fixed to the upper end of the outer wall of the base plate close to the first connecting seat, the positioning block is fixed to the surface of the second connecting seat, the second pneumatic clamp is fixed to the lower end of the surface of the second connecting seat, and the second pneumatic clamp is located below the positioning block.

[0007] Preferably, the left side profile detection mechanism includes a fixed support panel, a left side adjustment plate, a left side first detection block, a left side second detection block and a left side third detection block. The fixed support panel is fixed to the side of the outer wall of the bottom plate close to the horizontal bar, and the fixed support panel is located at the end of the horizontal bar. The left side adjustment plate is slidably connected to the surface of the fixed support panel through a first linear slide rail, and the left side first detection block, the left side second detection block and the left side third detection block are fixed to the surface of the left side adjustment plate in sequence from top to bottom.

[0008] Preferably, the right side profile detection mechanism includes a large support plate, a small support plate, a right side adjustment plate, a right side first detection block, a right side second detection block and a right side third detection block. The large support plate is fixed to the side of the outer wall of the bottom plate close to the horizontal bar, and the large support plate is located at the end of the horizontal bar away from the fixed support panel. The small support plate is slidably connected to the outer wall of the large support plate through a second linear slide rail, the right side adjustment plate is slidably connected to the outer wall of the small support plate through a third linear slide rail, and the surface of the right side adjustment plate is fixed with the right side first detection block, the right side second detection block and the right side third detection block in sequence from top to bottom.

[0009] Preferably, first positioning blocks are fixed on the surface of the fixed support panel and the surface of the large support plate at equal distances from top to bottom, first positioning pins are inserted into one side of the middle of the left adjustment plate and one side of the middle of the small support plate, and the two first positioning pins are inserted into the first positioning blocks corresponding to their positions, second positioning blocks are symmetrically fixed on the surface of the small support plate, and second positioning pins are symmetrically inserted into one side of the right adjustment plate, and the two second positioning pins are inserted into the second positioning blocks corresponding to their positions.

[0010] Preferably, handles are fixed on the surface of the left adjustment plate and the surface of the small support plate.

[0011] Preferably, the auxiliary detection mechanism includes a support sleeve, a fixing rod, an auxiliary left-side profile detection block, an auxiliary right-side profile detection block and a third pneumatic clamp, the two support sleeves are fixed to the lower end of the outer wall of the base plate near the horizontal bar, the fixing rod is fixedly connected to the inner wall of the support sleeve, a placement plate is fixed on the top of the fixing rod, a sink groove is formed on the top of the placement plate, the two auxiliary left-side profile detection blocks are fixed to the lower end of the outer wall of the base plate near the support sleeve, and the auxiliary left-side profile detection block is located above the placement plate, the two auxiliary right-side profile detection blocks are fixed to the outer wall of the base plate near the lower end of the auxiliary left-side profile detection block, and the position of the auxiliary right-side profile detection block corresponds to the auxiliary left-side profile detection block, eight third pneumatic clamps are fixed to the outer wall of the base plate near the auxiliary left-side profile detection block, and the eight third pneumatic clamps are divided into a group of four, and two groups of third pneumatic clamps are respectively located between the auxiliary left-side profile detection block and the auxiliary right-side profile detection block on both sides.

[0012] Preferably, two groups of threshold installation mechanisms, left-side profile detection mechanisms, right-side profile detection mechanisms and auxiliary detection mechanisms are each provided, and the two groups of threshold installation mechanisms, the two groups of left-side profile detection mechanisms, the two groups of right-side profile detection mechanisms and the two groups of auxiliary detection mechanisms are all symmetrically fixed on both sides of the base plate.

[0013] Preferably, self-locking universal wheels are symmetrically fixed to the bottom of the base frame.

[0014] Preferably, lifting rings are symmetrically fixed on both sides of the upper end of the bottom plate.

[0015] At the same time, the present invention also adopts a new detection method:

[0016] There are three states of threshold assemblies, and each set of assembly products is relatively long. If a test fixture is developed for each set of assemblies, three sets of threshold assembly test fixtures are required. The development cost is high, the floor space is large, the practicality is poor, and it is inconvenient to use. In order to solve the previous problems, a set of left and right threshold assemblies are arranged on the left and right sides of the test fixture plate. The fixed points of the same position of the threshold assembly on the same side are universal, and the fixed points of different positions are designed to be fixed at different positions. They are all fixed on the bottom plate of the assembly test fixture. However, the detection of threshold assemblies in different states is the most prominent problem that needs to be solved. The shape of the threshold assembly is different, and the boundary between the periphery and the body is also different. In addition, the matching relationship between each set of threshold assembly and the body includes the left, right and upper areas. By comparing the shapes of the three areas of the P05 threshold assembly with the body environment parts, the shapes of the left and right sides are completely different. It is necessary to design a detection mechanism that slides up and down. The sliding fixed position is divided into three positions: upper, middle and lower. Each position corresponds to a detection block of one state. The three detection blocks are arranged and fixed on the same large sliding slider, so that the detection of three different profiles can be realized. As for the other side, when sliding up and down, there will be motion interference with the product. It is also necessary to design corresponding lateral sliding at different positions of the top, middle and bottom. The up and down sliding avoids interference with the product, and the left and right sliding ensures that the detection block is installed in the theoretical detection position. At the same time, for the three products with the same upper shape, a unified detection block can be designed to realize the surface detection function of the same area position of the three shapes.

[0017] 1. The large bottom plate of the inspection fixture is placed vertically, which is equivalent to the vehicle body. The products are assembled from the front and back of the side in the simulated loading direction. The left and right products are assembled on the left and right sides of the vertically placed large bottom plate of the inspection fixture, which completely simulates the loading method of left and right parts, is easy to assemble and the vertical placement greatly saves space.

[0018] 2. On the large bottom plate of the inspection fixture, all the positioning and fixing connection points of the three states of the door sill assembly corresponding to the vehicle body are designed to ensure that the three states of the door sill assembly can use the same bottom plate of the inspection fixture (if the products involved are different but have the same fixed position, the same fixing point can be designed on the inspection fixture for fixing.

[0019] 3. For the threshold assembly of three states, at the same surface position on the upper part, the inspection fixture is designed with the same surface detection block to realize the detection of three states. Similarly, the inspection block of the inspection fixture is offset from the inspected product by a certain distance (3mm) to detect the gap surface or surface difference (0mm) of the product.

[0020] 4. The three-state threshold assembly has different shapes in the left area. The inspection fixture is designed with a fixed support panel, and a slide rail with a certain movement direction is designed on the panel. Three different detection blocks corresponding to the different shapes of the product in this area are designed and installed on another panel. This panel is designed on the above slide rail. When corresponding to different product inspections, the panel is guided along the movement direction of the slide rail, and the latch is fixed after it is in place to inspect the corresponding state product surface. Similarly, the inspection block of the inspection fixture is offset by a certain distance (3mm) from the inspected product to detect the product gap surface or surface difference (0mm) surface.

[0021] 5. The three-state threshold assembly has different shapes in the right area, and the products are quite different. If a single upward and downward slide rail is designed, there will be interference between the non-corresponding detection blocks and the detection products when the detection blocks of the three states are arranged. Therefore, a horizontally movable slide rail is needed to avoid interference, that is, the detection block is horizontally returned when it slides up and down to the corresponding detection area. A large fixed support plate is designed for the inspection fixture, and two upward and downward sliding rails are designed on the panel. The holes and pins of the upper and lower sliding rails are designed at three heights, and the pins are used to fix the theoretical height. A small support plate is designed on the large support plate, and two horizontally movable slide rails are designed on the small support plate to ensure that the horizontal sliding can avoid interference for a certain distance, and fixed holes and pins are designed at the corresponding positions on the small support plate to ensure that the three-state detection blocks are fixed after the horizontal position is in place. Similarly, the inspection block of the inspection fixture is offset by a certain distance (3mm) from the inspected product to detect the product gap profile or face difference (0mm) profile.

[0022] Compared with the related art, the inspection fixture for realizing the three-state threshold assembly provided by the present invention has the following beneficial effects:

[0023] 1. The inspection tool provided by the present invention can complete the surface inspection of three different door sills of Great Wall P05 automobile, so that enterprises no longer need to use three different inspection tools to complete the inspection of three different door sills, which greatly saves the development cost of the inspection tool of the enterprise, and can reduce the floor space occupied by the inspection tool, which is convenient for enterprises to use. In actual use, the set door sill installation mechanism can match the plastic buckle position and the hinge structure hole position on the three different door sills. During installation, the plastic buckle can be clamped by the first pneumatic clamp or the second pneumatic clamp, and the hinge structure hole pin is inserted into the hinge structure control on the door sill, or the door sill is clamped into the inner side of the positioning block, so as to realize the fixing of the door sill, simulate the state of door sill loading, and then the left side surface inspection mechanism and the right side surface inspection mechanism can be used to inspect the surface of the two ends of the door sill;

[0024] 2. The auxiliary detection mechanism provided by the present invention can facilitate the inspection tool to complete the surface inspection of other types of door sills, further improving the adaptability of the inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is one of the overall structural schematic diagrams of the present invention;

[0026] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the door sill installation mechanism of the present invention;

[0028] Figure 4 It is an enlarged view of point A of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the left profile detection mechanism of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the right side profile detection mechanism of the present invention;

[0031] Figure 7 It is a schematic diagram of the handle position structure of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the auxiliary detection mechanism of the present invention;

[0033] Fig. 9 It is an enlarged view of B of the present invention;

[0034] Fig.10 It is a cross-sectional view of the inspection point at the left end;

[0035] Fig.11 It is a schematic diagram of the left end structure plane of the present invention;

[0036] Fig.12 This is a working state diagram of the present invention during left end detection;

[0037] Fig.13 This is a schematic diagram of the right end detection of the present invention;

[0038] Numbers in the figure: 1, chassis; 2, bottom plate; 3, threshold installation mechanism; 31, first connecting seat; 32, horizontal bar; 33, hinge structure hole pin; 34, first pneumatic clamp; 35, second connecting seat; 36, positioning block; 37, second pneumatic clamp; 4, left side profile detection mechanism; 41, fixed support panel; 42, left side adjustment plate; 43, left side first detection block; 44, left side second detection block; 45, left side third detection block; 5, right side profile detection mechanism; 51, large support plate; 52, small Support plate; 53, right side adjustment plate; 54, first detection block; 55, right side second detection block; 56, right side third detection block; 6, auxiliary detection mechanism; 61, support sleeve; 62, fixing rod; 63, placement plate; 63a, sink; 64, auxiliary left side profile detection block; 65, auxiliary right side profile detection block; 66, third pneumatic clamp; 7, first positioning block; 8, first positioning pin; 9, second positioning block; 10, second positioning pin; 11, handle; 12, self-locking universal wheel; 13, lifting ring. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0041] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the present invention provides a three-state threshold assembly inspection tool, including a base frame 1 and a base plate 2, the base plate 2 is fixed to the middle of the upper surface of the frame, and also includes a threshold installation mechanism 3, a left profile detection mechanism 4, a right profile detection mechanism 5 and an auxiliary detection mechanism 6. The threshold installation mechanism 3 is fixed to one side of the outer wall of the base plate 2 and is used to fix and install the threshold. The left profile detection mechanism 4 is fixed to one side of the outer wall of the base plate 2 close to the threshold installation mechanism 3, and the right profile detection mechanism 5 is fixed to one side of the outer wall of the base plate 2 close to the left profile detection mechanism 4. On the side, the auxiliary detection mechanism 6 is fixed to the lower end of the outer wall of the base plate 2 close to the right side profile detection mechanism 5, the threshold installation mechanism 3 includes a first connecting seat 31, a horizontal bar 32, a hinge structure hole pin 33 and a first pneumatic clamp 34, four first connecting seats 31 are equidistantly fixed to the upper end of one side of the outer wall of the base plate 2, the horizontal bar 32 is fixed to the side of the four first connecting seats 31 away from the base plate 2, several hinge structure hole pins 33 are all plugged and fixed to the lower end of the outer wall of the horizontal bar 32, and several first pneumatic clamps 34 are all fixed to the upper end of the outer wall of the horizontal bar 32.

[0042] The provided inspection fixture can complete the surface inspection of three different types of door sills on Great Wall P05 cars, solving the problem that traditional inspection fixtures can only inspect a single type of door sill, thereby greatly increasing the company's inspection fixture development costs and inspection fixture storage space.

[0043] See also Figure 3 and Figure 4 The threshold mounting mechanism 3 also includes a second connecting seat 35, a positioning block 36 and a second pneumatic clamp 37. The second connecting seat 35 is fixed to the upper end of the outer wall of the base plate 2 close to the first connecting seat 31. The positioning block 36 is fixed to the surface of the second connecting seat 35. The second pneumatic clamp 37 is fixed to the lower end of the surface of the second connecting seat 35. The second pneumatic clamp 37 is located below the positioning block 36.

[0044] Plastic buckles are fixed on the three door sills of the Great Wall P50 series cars. When installing on the actual car, the installation of the door sill and the car is completed by the plastic buckles. The door sill installation mechanism 3 can clamp the plastic buckles through the first pneumatic clamp 34 and the second pneumatic clamp 37 to simulate the actual loading state of the door sill. At the same time, the bottoms of the three door sills of the Great Wall P50 series cars are all provided with hinge structure holes. The hinge interface hole pins can be inserted into the hinge structure holes on the door sills when installing the door sills. The final effect is to completely simulate the actual loading position state of the door sills. When installing, the plastic buckles and hinge structure holes on different door sills are aligned with the corresponding first pneumatic clamp 34 or the second pneumatic clamp 37 and the hinge structure hole pin 33.

[0045] See also Figure 5 The left profile detection mechanism 4 includes a fixed support panel 41, a left adjustment plate 42, a left first detection block 43, a left second detection block 44 and a left third detection block 45. The fixed support panel 41 is fixed to the outer wall of the bottom plate 2 on one side close to the horizontal bar 32, and the fixed support panel 41 is located at the end of the horizontal bar 32. The left adjustment plate 42 is slidably connected to the surface of the fixed support panel 41 through a first linear slide rail, and the surface of the left adjustment plate 42 is fixed with the left first detection block 43, the left second detection block 44 and the left third detection block 45 in sequence from top to bottom.

[0046] During inspection, the positions of the left first inspection block 43, the left second inspection block 44 and the left third inspection block 45 are adjusted by moving the left adjustment plate 42 up and down, so that the height of one of the inspection blocks is adjusted to the same installation height as the threshold that matches it, and then the threshold is installed so that the profile of one end of the threshold corresponds to the inspection block on the left.

[0047] See also Figure 6The right side profile detection mechanism 5 includes a large support plate 51, a small support plate 52, a right side adjustment plate 53, a right side first detection block 54, a right side second detection block 55 and a right side third detection block 56. The large support plate 51 is fixed to the outer wall of the bottom plate 2 on one side close to the horizontal bar 32, and the large support plate 51 is located at the end of the horizontal bar 32 away from the fixed support panel 41. The small support plate 52 is slidably connected to the outer wall of the large support plate 51 through a second linear slide rail, and the right side adjustment plate 53 is slidably connected to the outer wall of the small support plate 52 through a third linear slide rail, and the surface of the right side adjustment plate 53 is fixed with the right side first detection block 54, the right side second detection block 55 and the right side third detection block 56 in sequence from top to bottom.

[0048] After the threshold is installed, the detection block on the right side is adjusted. However, if the detection block on the right side is only moved up and down during adjustment, it may be hindered by the threshold and the detection block cannot be adjusted up and down smoothly. Therefore, the degree of freedom of the detection block on the right side is increased so that the detection block on the right side can move up and down and left and right with two degrees of freedom to ensure that the movement track of the detection block on the right side will not be hindered by the threshold. The specific adjustment is the same as the adjustment of the left profile detection mechanism 4. It is necessary to adjust one of the three detection blocks of the right first detection block 54, the right second detection block 55 and the right third detection block 56 that matches the threshold to be detected to a position that matches the end of the threshold. Then the two end profiles of the threshold are detected by the detection blocks on the left and the right.

[0049] See also Figure 5 and Figure 6 The surfaces of the fixed support panel 41 and the large support plate 51 are fixed with first positioning blocks 7 equidistantly from top to bottom, one side of the middle of the left adjustment plate 42 and one side of the middle of the small support plate 52 are plugged with first positioning pins 8, and the two first positioning pins 8 are plugged with the first positioning blocks 7 corresponding to their positions, and the surface of the small support plate 52 is symmetrically fixed with second positioning blocks 9, and one side of the right adjustment plate 53 is symmetrically plugged with second positioning pins 10, and the two second positioning pins 10 are plugged with the second positioning blocks 9 corresponding to their positions.

[0050] When adjusting the height of the left adjustment plate 42 and the small support plate 52, the first positioning pin 8 is pulled out from a first positioning block 7 sleeved thereon, thereby adjusting the height of the left adjustment plate 42 or the small support plate 52. After the adjustment is completed, the first positioning pin 8 is inserted into the corresponding first positioning block 7, and the left and right position adjustment work of the right adjustment plate 53 is the same as above;

[0051] It should be emphasized that there is a large friction between the first positioning pin 8 and the second positioning pin 10 and the inner wall of the position where they are inserted, so that the first positioning pin 8 and the second positioning pin 10 will not be displaced due to the action during the detection work after being fixed in position.

[0052] See also Figure 5 and Figure 7 A handle 11 is fixed to the surface of the left adjustment plate 42 and the surface of the small support plate 52, so that people can move the left adjustment plate 42 and the small support plate 52 conveniently.

[0053] See also Figure 8 and Fig. 9 The auxiliary detection mechanism 6 includes a support sleeve 61, a fixing rod 62, an auxiliary left-side profile detection block 64, an auxiliary right-side profile detection block 65 and a third pneumatic clamp 66. The two support sleeves 61 are fixed to the lower end of the outer wall of the bottom plate 2 close to the horizontal bar 32. The fixing rod 62 is fixedly connected to the inner wall of the support sleeve 61. A placement plate 63 is fixed on the top of the fixing rod 62. A sink groove 63a is formed on the top of the placement plate 63. The two auxiliary left-side profile detection blocks 64 are fixed to the lower end of the outer wall of the bottom plate 2 close to the support sleeve 61. 4 is located above the placement plate 63, the two auxiliary right side profile detection blocks 65 are fixed to the lower end of the outer wall of the bottom plate 2 close to the auxiliary left side profile detection block 64, and the position of the auxiliary right side profile detection block 65 corresponds to the auxiliary left side profile detection block 64, the eight third pneumatic clamps 66 are fixed to the outer wall of the bottom plate 2 close to the auxiliary left side profile detection block 64, and the eight third pneumatic clamps 66 are divided into a group of four, and the two groups of third pneumatic clamps 66 are respectively located between the auxiliary left side profile detection block 64 and the auxiliary right side profile detection block 65 on both sides.

[0054] The auxiliary detection mechanism 6 is set up so that the inspection fixture can not only complete the inspection of the three types of door sills of the Great Wall P50 car, but also complete the surface inspection of the door sills of other models. During the inspection, the door sills of other models are placed on the inner side of the sink groove 63a on the top of the placement plate 63. The plastic buckles on the same door sill are clamped by the third starting clamp, and then the surface inspection of the door sill is carried out by the auxiliary left surface inspection block 64 and the auxiliary right surface inspection block 65.

[0055] See also Figure 1 and Figure 2 The threshold installation mechanism 3, the left side profile detection mechanism 4, the right side profile detection mechanism 5 and the auxiliary detection mechanism 6 are each provided with two groups, and the two groups of threshold installation mechanisms 3, the two groups of left side profile detection mechanisms 4, the two groups of right side profile detection mechanisms 5 and the two groups of auxiliary detection mechanisms 6 are all symmetrically fixed on both sides of the base plate 2.

[0056] Since the door sills on the car are in pairs and symmetrical, the inspection tool can complete the inspection work of the left and right door sills of the same model symmetrically, and can inspect the left and right door sills at the same time.

[0057] See also Figure 1 Self-locking universal wheels 12 are symmetrically fixed to the bottom of the base frame 1, which can facilitate the movement of the inspection tool.

[0058] See also Figure 1 , lifting rings 13 are symmetrically fixed on both sides of the upper end of the bottom plate 2, which can facilitate the crane to lift the inspection tool.

[0059] The present invention uses the following detection method for detection: Figure 10 to Figure 13 As shown:

[0060] There are three states of threshold assemblies, and each set of assembly products is relatively long. If a test fixture is developed for each set of assemblies, three sets of threshold assembly test fixtures are required. The development cost is high, the floor space is large, the practicality is poor, and it is inconvenient to use. In order to solve the previous problems, a set of left and right threshold assemblies are arranged on the left and right sides of the test fixture plate. The fixed points of the same position of the threshold assembly on the same side are universal, and the fixed points of different positions are designed to be fixed at different positions. They are all fixed on the bottom plate of the assembly test fixture. However, the detection of threshold assemblies in different states is the most prominent problem that needs to be solved. The shape of the threshold assembly is different, and the boundary between the periphery and the body is also different. In addition, the matching relationship between each set of threshold assembly and the body includes the left, right and upper areas. By comparing the shapes of the three areas of the P05 threshold assembly with the body environment parts, the shapes of the left and right sides are completely different. It is necessary to design a detection mechanism that slides up and down. The sliding fixed position is divided into three positions: upper, middle and lower. Each position corresponds to a detection block of one state. The three detection blocks are arranged and fixed on the same large sliding slider, so that the detection of three different profiles can be realized. As for the other side, when sliding up and down, there will be motion interference with the product. It is also necessary to design corresponding lateral sliding at different positions of the top, middle and bottom. The up and down sliding avoids interference with the product, and the left and right sliding ensures that the detection block is installed in the theoretical detection position. At the same time, for the three products with the same upper shape, a unified detection block can be designed to realize the surface detection function of the same area position of the three shapes.

[0061] The large bottom plate of the inspection fixture is placed vertically, which is equivalent to the vehicle body. The products are assembled from the front and back of the side in the simulated loading direction. The left and right products are assembled on the left and right sides of the vertically placed large bottom plate of the inspection fixture, completely simulating the loading method of left and right parts, which is convenient for assembly and the vertical placement greatly saves space.

[0062] On the large bottom plate of the inspection fixture, all the positioning and fixing connection points of the door sill assemblies in the three states corresponding to the vehicle body are designed accordingly to ensure that the door sill assemblies in the three states can use the same bottom plate of the inspection fixture (if the products involved are different but have the same fixed position, the same fixing point can be designed on the inspection fixture for fixing.

[0063] The threshold assembly of three states, at the same surface position on the upper part, the inspection fixture is designed with the same surface detection block to realize the detection of three states. Similarly, the inspection block of the inspection fixture is offset from the inspected product by a certain distance (3mm) to detect the gap surface or surface difference (0mm) of the product.

[0064] The three-state threshold assembly has different shapes in the left area. The inspection fixture is designed with a fixed support panel, and a slide rail with a certain movement direction is designed on the panel. Three different detection blocks corresponding to the different shapes of the product in this area are designed and installed on another panel. This panel is designed on the above slide rail. When corresponding to different product inspections, the panel is guided along the movement direction of the slide rail, and the latch is fixed after it is in place to inspect the corresponding state product surface. Similarly, the inspection block of the inspection fixture is offset by a certain distance (3mm) from the inspected product to detect the product gap surface or surface difference (0mm) surface.

[0065] The three-state threshold assembly has different shapes in the right area, and the products are quite different. If a single up-down slide rail is designed, there will be interference between the non-corresponding detection blocks and the detection products when the detection blocks of the three states are arranged. Therefore, a horizontally movable slide rail is needed to avoid interference, that is, the detection block is horizontally returned when it slides up and down to the corresponding detection area. A large fixed support plate is designed for the inspection fixture, and two slide rails that move up and down are designed on the panel. The holes and pins at three heights of the upper and lower slide rails are designed, and the pins are used to fix the theoretical height. A small support plate is designed on the large support plate, and two horizontally movable slide rails are designed on the small support plate to ensure that the horizontal sliding can avoid interference for a certain distance, and fixed holes and pins are designed at the corresponding positions on the small support plate to ensure that the three-state detection blocks are fixed after the horizontal position is in place. Similarly, the inspection block of the inspection fixture is offset by a certain distance (3mm) from the inspected product to detect the product gap profile or face difference (0mm) profile.

[0066] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0067] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A check fixture for realizing a threshold assembly in three states, comprising: Base frame (1); A bottom plate (2), the bottom plate (2) being fixed to the middle of the upper surface of the frame; It is characterized by further comprising: A threshold installation mechanism (3), the threshold installation mechanism (3) being fixed to one side of the outer wall of the base plate (2) and being used for fixing and installing the threshold; A left side profile detection mechanism (4), wherein the left side profile detection mechanism (4) is fixed on a side of the outer wall of the bottom plate (2) close to the door sill mounting mechanism (3); A right side profile detection mechanism (5), wherein the right side profile detection mechanism (5) is fixed on a side of the outer wall of the bottom plate (2) close to the left side profile detection mechanism (4); An auxiliary detection mechanism (6), the auxiliary detection mechanism (6) being fixed to the lower end of the outer wall of the bottom plate (2) close to the right profile detection mechanism (5); The threshold installation mechanism (3) comprises: A first connecting seat (31), four of the first connecting seats (31) being fixed at equal distances to the upper end of one side of the outer wall of the bottom plate (2); A horizontal bar (32), wherein the horizontal bar (32) is fixed to a side of the four first connecting seats (31) away from the bottom plate (2); Hinge structure hole plug pins (33), a plurality of hinge structure hole plug pins (33) are all plugged and fixed at the lower end of the outer wall of the horizontal bar (32); A first pneumatic clamp (34), wherein a plurality of the first pneumatic clamps (34) are fixed to the upper end of the outer wall of the horizontal bar (32); The left profile detection mechanism (4) comprises: A fixed support panel (41), wherein the fixed support panel (41) is fixed to a side of the outer wall of the bottom plate (2) close to the horizontal bar (32), and the fixed support panel (41) is located at an end of the horizontal bar (32); A left adjustment plate (42), wherein the left adjustment plate (42) is slidably connected to the surface of the fixed support panel (41) via a first linear slide rail, and a left first detection block (43), a left second detection block (44) and a left third detection block (45) are sequentially fixed on the surface of the left adjustment plate (42) from top to bottom; The right side profile detection mechanism (5) comprises: A large support plate (51), wherein the large support plate (51) is fixed to a side of the outer wall of the bottom plate (2) close to the horizontal bar (32), and the large support plate (51) is located at an end of the horizontal bar (32) away from the fixed support panel (41); A small support plate (52), wherein the small support plate (52) is slidably connected to the outer wall of the large support plate (51) via a second linear slide rail; A right side adjustment plate (53) is slidably connected to the outer wall of the small support plate (52) via a third linear slide rail, and a right side first detection block (54), a right side second detection block (55) and a right side third detection block (56) are fixed in sequence from top to bottom on the surface of the right side adjustment plate (53).

2. The inspection fixture for realizing a three-state threshold assembly according to claim 1, characterized in that: The threshold installation mechanism (3) further comprises: A second connecting seat (35), the second connecting seat (35) being fixed to an upper end of an outer wall of the bottom plate (2) close to a side of the first connecting seat (31); A positioning block (36), wherein the positioning block (36) is fixed on the surface of the second connecting seat (35); A second pneumatic clamp (37), the second pneumatic clamp (37) is fixed to the lower end of the surface of the second connecting seat (35), and the second pneumatic clamp (37) is located below the positioning block (36).

3. The inspection fixture for realizing a three-state threshold assembly according to claim 1, characterized in that: The surfaces of the fixed support panel (41) and the large support plate (51) are both equidistantly fixed with first positioning blocks (7) from top to bottom; one side of the middle of the left adjustment plate (42) and one side of the middle of the small support plate (52) are both plugged with first positioning pins (8); the two first positioning pins (8) are both plugged with the first positioning blocks (7) corresponding to their positions; the surface of the small support plate (52) is symmetrically fixed with second positioning blocks (9); one side of the right adjustment plate (53) is symmetrically plugged with second positioning pins (10); the two second positioning pins (10) are both plugged with the second positioning blocks (9) corresponding to their positions.

4. The inspection fixture for realizing a three-state threshold assembly according to claim 1, characterized in that: A handle (11) is fixed to the surface of the left adjustment plate (42) and the surface of the small support plate (52).

5. The inspection fixture for realizing a three-state threshold assembly according to claim 1, characterized in that: The auxiliary detection mechanism (6) comprises: Support sleeves (61), two of the support sleeves (61) are fixed to the lower end of the outer wall of the bottom plate (2) close to the horizontal bar (32); A fixing rod (62), the fixing rod (62) being fixedly connected to the inner wall of the supporting sleeve (61), a placement plate (63) being fixed on the top of the fixing rod (62), and a sink groove (63a) being formed on the top of the placement plate (63); Auxiliary left side profile detection blocks (64), wherein the two auxiliary left side profile detection blocks (64) are both fixed to the lower end of the outer wall of the bottom plate (2) close to the support sleeve (61), and the auxiliary left side profile detection blocks (64) are located above the placement plate (63); Auxiliary right side profile detection blocks (65), wherein the two auxiliary right side profile detection blocks (65) are fixed to the lower end of the outer wall of the bottom plate (2) close to the auxiliary left side profile detection block (64), and the position of the auxiliary right side profile detection block (65) corresponds to the auxiliary left side profile detection block (64); The third pneumatic clamps (66) are eight and are all fixed on the outer wall of the bottom plate (2) near the side of the auxiliary left profile detection block (64). The eight third pneumatic clamps (66) are grouped into four pieces each. The two groups of the third pneumatic clamps (66) are respectively located between the auxiliary left profile detection block (64) and the auxiliary right profile detection block (65) on both sides.

6. The inspection fixture for realizing a three-state threshold assembly according to claim 5, characterized in that: The threshold installation mechanism (3), the left side profile detection mechanism (4), the right side profile detection mechanism (5) and the auxiliary detection mechanism (6) are each provided in two groups, and the two groups of threshold installation mechanisms (3), the two groups of left side profile detection mechanisms (4), the two groups of right side profile detection mechanisms (5) and the two groups of auxiliary detection mechanisms (6) are all symmetrically fixed on the two sides of the bottom plate (2).

7. The inspection fixture for realizing a three-state threshold assembly according to claim 1, characterized in that: Self-locking universal wheels (12) are symmetrically fixed to the bottom of the base frame (1).

8. The inspection fixture for realizing a three-state door sill assembly according to claim 1, characterized in that: Hanging rings (13) are symmetrically fixed on both sides of the upper end of the bottom plate (2).

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