High clearance detection fixture

Abstract

This utility model discloses a height detection fixture, comprising: a base plate, the top surface of which is divided into a detection placement surface and an entry / exit guide surface arranged front and rear; the base plate is provided with first and second internal threaded holes; a first L-shaped block, which includes a first vertical plate portion and a first horizontal plate portion; the first vertical plate portion is provided with a first connecting hole; the first L-shaped block is detachably installed on the base plate by a first screw, and a first height detection groove is formed between the bottom surface of the first horizontal plate portion and the detection placement surface; a second L-shaped block, which includes a second vertical plate portion and a second horizontal plate portion; the second vertical plate portion is provided with a second connecting hole; the second L-shaped block is detachably installed on the base plate by a second screw, and a second height detection groove is formed between the bottom surface of the second horizontal plate portion and the detection placement surface; its structure is simple, low in cost, fast and efficient in operation, requires low operator skills, and is easy to replace or adjust the L-shaped blocks to adapt to the height detection needs of different product specifications, and has strong versatility.

Description

Technical Field

[0001] This utility model relates to the field of product height detection technology, and in particular to a height clearance detection fixture. Background Technology

[0002] While intelligent inspection equipment for measuring product dimensions (such as product height) has become a mature technology with technological advancements, its widespread adoption remains difficult for many small and medium-sized processing plants due to objective limitations. Currently, for sampling inspections of large batches of products, measuring instruments (such as vernier calipers and dial indicators) are generally used. However, for full inspection of batches of products, using existing measuring instruments is cumbersome and inefficient.

[0003] Based on this, some manual height measurement go / no-go gauges have emerged. For example, CN203928961U discloses a manual height detection go / no-go gauge for sorting the height range of magnetic cores. It includes: a detection base plate, which is a rectangular plate with a smooth and flat surface; a detection beam, which includes an upper limit detection beam and a lower limit detection beam, which are respectively fixed to the detection base plate at an acute angle, dividing the detection base plate into three parts. The lower surfaces of the upper limit detection beam and the lower limit detection beam are respectively separated from the upper surface of the detection base plate; and a support leg, which includes a high leg and a low leg, which are respectively connected to the two ends of the lower surface of the detection base plate and make the detection base plate tilted. In use, magnetic cores are put in batches from the magnetic core inlet and slide down along the detection base plate. Magnetic cores that are higher than the upper limit flow out from the magnetic core outlet that is higher than the upper limit. Magnetic cores that are lower than the upper limit standard block continue to slide down after passing through the upper limit detection beam. Magnetic cores that are higher than the lower limit standard block flow out from the magnetic core outlet that is qualified in height. Magnetic cores that are lower than the lower limit standard block flow out from the magnetic core outlet that is lower than the lower limit after passing through the lower limit detection beam.

[0004] For some small products, such as metal housings for automotive sensors and precision connectors, the entire machining process has already been completed. These small products are roughly cylindrical or cylindrical, with flat upper and lower end faces. The product's vertical height is greater than its outer diameter, and the outer surface is already machined. If the aforementioned manual height-checking go / no-go gauge is used to check the height, the following problems will occur:

[0005] 1. When the product slides down from top to bottom, multiple products are prone to collision, which affects the outer surface of the product and causes scratches, dents, etc., making it difficult for the product surface to meet the standards.

[0006] 2. Because its height-to-width ratio is greater than 1, the product is prone to tipping over during the tilting and sliding process, which can cause the height measurement to fail. For example, if the product tipps over during the process, it will slide down from below the upper limit detection beam and then pass under the lower limit detection beam. The detection will show that the height is below the lower limit, but in reality, the detection result may be qualified (if it did not tilt, it would not pass under the lower limit detection beam). In fact, the product height may be higher than the upper limit, but it passed under the upper limit detection beam smoothly because it tipped over.

[0007] In addition, for some automotive sensor metal housings, precision connector metal housings, etc., which are series products with similar or identical design dimensions, the dimensional accuracy standards (acceptable tolerances) vary for different customers. How to research a method that can be used for high-level full inspection of mass-produced products, while meeting the requirements of low cost, fast and efficient operation, and strong versatility, has become an urgent need for the actual production and processing technology of processing plants. Utility Model Content

[0008] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a height detection fixture that is simple in structure, low in cost, quick and efficient in operation, requires low operator skills, and is easy to replace or adjust the L-shaped block to adapt to the height detection needs of different product specifications, and has strong versatility.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A high clearance detection fixture, comprising:

[0011] The base plate has a horizontal top surface, which is divided into a front and rear inspection placement surface and an entry and exit guide surface. The base plate is provided with a first internal thread hole and a second internal thread hole at a distance from left to right. Both the first internal thread hole and the second internal thread hole penetrate upward through the inspection placement surface.

[0012] The first L-shaped block includes a first vertical plate and a first horizontal plate. The first horizontal plate extends horizontally forward from the top of the first vertical plate. A first connecting hole is provided in the first vertical plate, and the first connecting hole passes through the bottom end of the first vertical plate. The first L-shaped block is detachably installed on the base plate by a first screw. A first height detection groove is formed between the bottom surface of the first horizontal plate and the detection placement surface. The rear side, left side, and right side of the first height detection groove are fully open.

[0013] The second L-shaped block includes a second vertical plate and a second horizontal plate. The second horizontal plate extends horizontally forward from the top of the second vertical plate. A second connecting hole is provided in the second vertical plate, which passes through the bottom of the second vertical plate. The second L-shaped block is detachably installed on the base plate by a second screw. A second height detection groove is formed between the bottom surface of the second horizontal plate and the detection placement surface. The rear, left, and right sides of the second height detection groove are fully open.

[0014] The first height detection slot and the second height detection slot have different heights and satisfy the following conditions: one is the lower limit of the product height and the other is the upper limit of the product height.

[0015] As a preferred embodiment, the first connecting hole extends upward through the top of the first horizontal plate; the second connecting hole extends upward through the top of the second horizontal plate; both the first connecting hole and the second connecting hole include an inner hole section and an outer hole section that are connected and connected sequentially from bottom to top, and the cross-section of the outer hole section is larger than the cross-section of the inner hole section, so that the inner bottom surface of the outer hole section forms a first horizontal step surface located on the outer periphery of the top of the inner hole section.

[0016] As a preferred option, the inner hole section is a smooth hole, and its cross-section is larger than the corresponding first internal thread hole and second internal thread hole.

[0017] As a preferred embodiment, the inner section of the first connecting hole and / or the second connecting hole is an internally threaded hole, and its cross-section is consistent with the corresponding first internally threaded hole and second internally threaded hole. The first screw and the second screw are threaded downwards to the inner section and the corresponding first internally threaded hole and second internally threaded hole.

[0018] As a preferred option, both the inner and outer hole sections are oblong holes, with their front-to-back width greater than their left-to-right width, and their left-to-right width greater than or equal to the diameter of the corresponding first and second internal threaded holes.

[0019] As a preferred embodiment, a first stop portion extends downward from the bottom of the rear end of the first vertical plate portion, and the front side of the first stop portion maintains a first gap with the inner hole section;

[0020] The second stop extends downward from the bottom rear end of the second vertical plate, and the front side of the second stop maintains a second gap with the inner hole section.

[0021] As a preferred option, it also includes:

[0022] A thin adjusting shim is provided with a clearance through hole, the diameter of which is greater than or equal to the diameter of the corresponding first internal thread hole and second internal thread hole.

[0023] As a preferred embodiment, one or more thin adjusting shims are detachably placed between the bottom surface of the first vertical plate or the second vertical plate and the detection placement surface of the base plate.

[0024] As a preferred embodiment, the lower end of the first internal threaded hole and / or the second internal threaded hole is also connected to an adjusting groove, the adjusting groove extending downward through the bottom surface of the base plate, the cross-section of the adjusting groove being larger than the cross-section of the corresponding first internal threaded hole and the second internal threaded hole, and the inner top surface of the adjusting groove forming a second horizontal step surface located on the outer periphery of the bottom of the corresponding first internal threaded hole and the second internal threaded hole.

[0025] Accordingly, the first connecting hole and / or the second connecting hole are internal threaded holes; the first screw and / or the second screw extend upward into the corresponding first internal threaded hole and the second internal threaded hole, and are threadedly connected to the corresponding first connecting hole and / or the second connecting hole.

[0026] As a preferred embodiment, the upper end of the corresponding first connecting hole and / or second connecting hole is a blind end, which does not penetrate the corresponding first horizontal plate portion and / or second template portion.

[0027] Compared with existing technologies, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly uses a base plate and a first L-shaped block and a second L-shaped block detachably mounted on the base plate to form a first height detection groove and a second height detection groove that are fully open on three sides. The heights of the first height detection groove and the second height detection groove are different and satisfy the following: one is the lower limit Hmin of the product height, and the other is the upper limit Hmax of the product height. Its structure is simple, manufacturing and maintenance costs are low, and operation is simple (sliding products). The three-sided open design greatly facilitates the placement, removal and sliding of products, making detection faster and more efficient. The judgment is intuitive (pass / fail), and the detection speed is extremely fast. It is very suitable for online full inspection or sampling inspection in mass production. Compared with traditional measuring tools, this fixture is more intuitive and reliable, requires no reading, relies on physical contact for judgment, the results are clear, it is less prone to error, and the operator skill requirements are low. At the same time, the detachable design makes it easy to replace or adjust the L-shaped blocks to adapt to the height detection needs of different product specifications, and has strong versatility. This type of fixture is suitable for widespread use in workshops for height inspection because it is low in cost and small in size. Each person can be equipped with one, which facilitates a rapid response to the need for full height inspection of batch products. Compared with the sampling inspection method in traditional technology, it can better control the product height to meet the standard.

[0028] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0029] Figure 1 This is a perspective view of a height clearance detection fixture according to an embodiment of the present utility model;

[0030] Figure 2This is another perspective view of the height clearance detection fixture according to an embodiment of the present utility model;

[0031] Figure 3 This is a cross-sectional view of a height clearance detection fixture according to an embodiment of the present invention;

[0032] Figure 4 This is a front view of a height clearance detection fixture according to an embodiment of the present invention;

[0033] Figure 5 This is a cross-sectional view of a height clearance detection fixture according to another embodiment of the present invention. Detailed Implementation

[0034] Please refer to Figures 1 to 5 As shown, it illustrates the specific structure of various embodiments of the present invention.

[0035] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] A height clearance detection fixture includes a base plate 10 and a first L-shaped block 20 and a second L-shaped block 30 detachably mounted on the base plate 10.

[0037] The base plate 10 has a horizontal top surface, which is defined as the detection placement surface 101 and the entry / exit guide surface 12 arranged sequentially from front to back. The base plate 10 is provided with a first internal threaded hole 11 and a second internal threaded hole 12 at left and right intervals. The depth direction of the first internal threaded hole 11 and the second internal threaded hole 12 are both vertically extended and penetrate the detection placement surface 101 upwards. The bottom surface of the base plate 10 is usually also a horizontal surface. The base plate serves as the reference platform and installation base of the entire fixture, providing a flat support surface on which the product slides. The top surface is the reference surface for height measurement.

[0038] The first L-shaped block 20 includes an integrally connected first vertical plate portion 21 and a first horizontal plate portion 22. The first horizontal plate portion 22 extends horizontally forward from the top of the first vertical plate portion 21. A first connecting hole 201 is provided in the first vertical plate portion 21. The first connecting hole 201 extends vertically in the depth direction and penetrates downward through the bottom end of the first vertical plate portion 21. The first L-shaped block 20 is detachably installed on the base plate 10 by a first screw. The first horizontal plate portion 22 is suspended above the detection placement surface 101. A first height detection groove 202 is formed between the bottom surface of the first horizontal plate portion 22 and the detection placement surface 101. The rear side, left side, and right side of the first height detection groove 202 are fully open and penetrating. A flexible protective pad 40 is attached to the top surface of the first horizontal plate portion 22. A material with anti-static function can also be selected.

[0039] The second L-shaped block 30 includes a second vertical plate portion 31 and a second horizontal plate portion 32 integrally connected. The second horizontal plate portion 32 extends horizontally forward from the top of the second vertical plate portion 31. A second connecting hole 301 is provided in the second vertical plate portion 31. The second connecting hole 301 extends vertically in the depth direction and penetrates downward through the bottom end of the second vertical plate portion 31. The second L-shaped block 30 is detachably installed on the base plate 10 by a second screw. The second horizontal plate portion 32 is suspended above the detection placement surface 101. A second height detection groove 302 is formed between the bottom surface of the second horizontal plate portion 32 and the detection placement surface 101. The rear side, left side, and right side of the second height detection groove 302 are fully open and penetrating. A flexible protective pad 40 is attached to the top surface of the first horizontal plate portion 22. A material with anti-static function can also be selected.

[0040] The heights of the first height detection slot 202 and the second height detection slot 302 are different, and they satisfy the following conditions: one is the lower limit of product height Hmin, and the other is the upper limit of product height Hmax.

[0041] When in use, place the product on the inlet / outlet guide surface 12 and slide it forward toward the first height detection groove 202 and the second height detection groove 302 in sequence. If both conditions "low groove cannot pass" and "high groove can pass" are met, it means that the product height dimension is qualified, that is, the product height is between the highest and lowest values; if one of the conditions is not met, the product height dimension is unqualified.

[0042] The first connecting hole 201 extends upward through the top end of the first horizontal plate portion 22; the second connecting hole 301 extends upward through the top end of the second horizontal plate portion 32; both the first connecting hole 201 and the second connecting hole 301 include an inner hole section 3011 and an outer hole section 3012 connected sequentially from bottom to top, the cross-section of the outer hole section 3012 is larger than the cross-section of the inner hole section 3011, such that the inner bottom surface of the outer hole section 3012 forms a first horizontal step surface 3013 located on the top outer periphery of the inner hole section 3011; during installation, the first screw passes downward through the first connecting hole 201 and is threaded into the first internal threaded hole 11, the second screw passes downward through the second connecting hole 301 and is threaded into the second internal threaded hole 12, the bottom ends of the caps of the first screw and the second screw abut against the corresponding first horizontal step surface 3013, and the caps are hidden in the corresponding outer hole section.

[0043] In this embodiment, the inner hole section is a smooth hole, and its cross-section is larger than the corresponding first internal threaded hole 11 and second internal threaded hole 21. Both the inner hole section and the outer hole section are oblong holes, with their front-to-back width greater than their left-to-right width, and their left-to-right width greater than or equal to the diameter of the corresponding first internal threaded hole 11 and second internal threaded hole 12. This allows the first L-shaped block 20 and the second L-shaped block 30 to be adjusted in the front-to-back direction, so that the area left on the detection placement surface 101 can be flexibly varied. The first stop 211 extends downward from the rear bottom of the first vertical plate 21, and the front side of the first stop 211 maintains a first gap with the inner hole section; the second stop 311 extends downward from the rear bottom of the second vertical plate 31, and the front side of the second stop 311 maintains a second gap D1 with the inner hole section.

[0044] Furthermore, the height clearance detection fixture also includes a thin adjusting shim 50, which is designed to conform to the bottom surface of the corresponding first vertical plate portion 21 or second vertical plate portion 31. It is provided with a clearance through hole 51, the diameter of which is greater than or equal to the diameter of the corresponding first internal threaded hole 11 or second internal threaded hole 12. One or more thin adjusting shims 50 are detachably placed between the bottom surface of the first vertical plate portion 21 or second vertical plate portion 31 and the detection placement surface 101 of the base plate 10.

[0045] In another embodiment, the inner hole section of the first connecting hole 201 and / or the second connecting hole 301 is an internally threaded hole, and its cross-section is consistent with the corresponding first internally threaded hole 11 and second internally threaded hole 21. The first screw and the second screw are threaded downwards to the inner hole section and the corresponding first internally threaded hole 11 and second internally threaded hole 21. The height of the corresponding first height detection groove 202 and second height detection groove 302 can be adjusted by rotating the cap. Specifically, if either the upper limit Hmax or the lower limit Hmin of the product height needs to be adjusted, then one inner hole section is designed as an internally threaded hole; if both the upper limit Hmax and the lower limit Hmin of the product height need to be adjusted, then both inner hole sections are designed as internally threaded holes. These considerations require specific consideration of the current series of products being tested, as well as the different dimensional accuracy requirements of different customers for the same product. Therefore, height clearance detection fixtures are designed and selected accordingly to achieve height clearance detection of small-sized products in the factory at the lowest cost. The operation is simple, practical, and does not rely on high-cost testing equipment.

[0046] Alternatively, the screw head can be positioned downwards. Specifically, the lower end of the first internal threaded hole 11 and / or the second internal threaded hole 12 is also connected to an adjusting groove. The adjusting groove extends downwards through the bottom surface of the base plate 10. The cross-section of the adjusting groove is larger than the cross-section of the corresponding first internal threaded hole 11 and the second internal threaded hole 12. The inner top surface of the adjusting groove forms a second horizontal step surface located on the outer periphery of the bottom of the corresponding first internal threaded hole 11 and the second internal threaded hole 12. Correspondingly, the first connecting hole 201 and / or the second connecting hole 301 are internal threaded holes. The first screw and / or the second screw extend upwards into the corresponding first internal threaded hole 11 and the second internal threaded hole 12, and are threadedly connected to the corresponding first connecting hole 201 and / or the second connecting hole 301. Rotating the first screw and / or the second screw can adjust the height of the corresponding first height detection groove 202 and the second height detection groove 302. The upper ends of the corresponding first connecting hole 201 and / or second connecting hole 301 are blind ends, not penetrating the corresponding first horizontal plate portion 22 and / or second template portion 32, to prevent dust and dirt from entering from the top. The advantage of this solution is that the first and second screws used for connection, fixation, and height adjustment are concealed, preventing accidental adjustment. Furthermore, the heads of the first and second screws can be designed with non-slotted or cross-shaped grooves, requiring special tools to rotate them.

[0047] Next, a testing procedure is provided: Step 1: Attempt to slide the product forward into the low groove (the second height detection groove 302) by sliding it through the low groove (Hmin). Expected result (stop): The product cannot pass through the low groove, and the product height > Hmin; if the product can enter the low groove, it means its height ≤ Hmin, that is, it is lower than or equal to the minimum allowable value, and it is unqualified (too small). Step 2: Attempt to slide the product forward into the high groove (Hmax) by sliding it through the high groove (the first height detection groove 202). Expected result (pass): The product can pass through the high groove smoothly, and the product height ≤ Hmax; if the product cannot pass through the high groove, it means its height > Hmax, that is, it is greater than the maximum allowable value, and it is unqualified (too large). Qualification judgment: When both conditions of "cannot pass through the low groove" and "can pass through the high groove" are met, the product height is judged to be qualified, that is: Hmin < product height ≤ Hmax.

[0048] The key design feature of this invention lies in its use of a base plate and two L-shaped blocks detachably mounted on the base plate. These blocks form three fully open, through-hole height detection slots on the base plate. The heights of the first and second height detection slots differ, and each slot satisfies a minimum product height (Hmin) and a maximum product height (Hmax). This design offers a simple structure, low manufacturing and maintenance costs, and easy operation (sliding products). The three-sided through-hole design greatly facilitates product placement, removal, and sliding operations, making detection faster and more efficient. The judgment is intuitive (pass / fail), and the detection speed is extremely fast, making it ideal for online full inspection or sampling in mass production. Compared to traditional measuring tools, this fixture is more intuitive and reliable, requiring no readings and relying on physical contact for judgment. The results are clear, less prone to error, and require less operator skill. Furthermore, the detachable design allows for easy replacement or adjustment of the L-shaped blocks to adapt to the height detection needs of different product specifications, demonstrating strong versatility. This type of fixture is suitable for widespread use in workshops for height inspection because it is low in cost and small in size. Each person can be equipped with one, which facilitates a rapid response to the need for full height inspection of batch products. Compared with the sampling inspection method in traditional technology, it can better control the product height to meet the standard.

[0049] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A highly-passing stop detection jig characterized by, include: The base plate has a horizontal top surface, which is divided into a front and rear inspection placement surface and an entry and exit guide surface. The base plate is provided with a first internal thread hole and a second internal thread hole at a distance from left to right. Both the first internal thread hole and the second internal thread hole penetrate upward through the inspection placement surface. The first L-shaped block includes a first vertical plate and a first horizontal plate. The first horizontal plate extends horizontally forward from the top of the first vertical plate. A first connecting hole is provided in the first vertical plate, which passes downward through the bottom of the first vertical plate. The first L-shaped block is detachably mounted on the base plate by a first screw. A first height detection groove is formed between the bottom surface of the first horizontal plate and the detection placement surface. The rear, left, and right sides of the first height detection groove are fully open. The second L-shaped block includes a second vertical plate and a second horizontal plate. The second horizontal plate extends horizontally forward from the top of the second vertical plate. A second connecting hole is provided in the second vertical plate, which passes downward through the bottom of the second vertical plate. The second L-shaped block is detachably mounted on the base plate by a second screw. A second height detection groove is formed between the bottom surface of the second horizontal plate and the detection placement surface. The rear, left, and right sides of the second height detection groove are fully open. The first height detection slot and the second height detection slot have different heights and satisfy the following conditions: one is the lower limit of the product height and the other is the upper limit of the product height.

2. The height open / short detection jig according to claim 1, characterized by, The first connecting hole extends upward through the top of the first horizontal plate; the second connecting hole extends upward through the top of the second horizontal plate; both the first connecting hole and the second connecting hole include an inner hole section and an outer hole section that are connected and connected from bottom to top, and the cross-section of the outer hole section is larger than the cross-section of the inner hole section, so that the inner bottom surface of the outer hole section forms a first horizontal step surface located on the outer periphery of the top of the inner hole section.

3. The height clearance detection fixture according to claim 2, characterized in that, The inner hole section is a smooth hole, and its cross-section is larger than the corresponding first internal thread hole and second internal thread hole.

4. The height clearance detection fixture according to claim 2, characterized in that, The inner section of the first connecting hole and / or the second connecting hole is an internally threaded hole, and its cross-section is consistent with the corresponding first internally threaded hole and second internally threaded hole. The first screw and the second screw are threaded downwards to the inner section and the corresponding first internally threaded hole and second internally threaded hole.

5. The height clearance detection fixture according to claim 3, characterized in that, Both the inner and outer sections are oblong holes, with their front-to-back width greater than their left-to-right width, and their left-to-right width greater than or equal to the diameter of the corresponding first and second internal threaded holes.

6. The height clearance detection fixture according to claim 5, characterized in that, The first stop portion extends downward from the bottom rear end of the first vertical plate portion, and the front side of the first stop portion maintains a first gap with the inner hole section. The second stop extends downward from the bottom rear end of the second vertical plate, and the front side of the second stop maintains a second gap with the inner hole section.

7. The height clearance detection fixture according to claim 3, characterized in that, Also includes: A thin adjusting shim is provided with a clearance through hole, the diameter of which is greater than or equal to the diameter of the corresponding first internal thread hole and second internal thread hole.

8. The height clearance detection fixture according to claim 7, characterized in that, One or more thin adjusting shims are detachably placed between the bottom surface of the first or second vertical plate and the detection placement surface of the base plate.

9. The height clearance detection fixture according to claim 3, characterized in that, The lower end of the first internal threaded hole and / or the second internal threaded hole is also connected to an adjusting groove. The adjusting groove extends downward through the bottom surface of the base plate. The cross-section of the adjusting groove is larger than the cross-section of the corresponding first internal threaded hole and the second internal threaded hole. The inner top surface of the adjusting groove forms a second horizontal step surface located on the outer periphery of the bottom of the corresponding first internal threaded hole and the second internal threaded hole. Accordingly, the first connecting hole and / or the second connecting hole are internal threaded holes; the first screw and / or the second screw extend upward into the corresponding first internal threaded hole and the second internal threaded hole, and are threadedly connected to the corresponding first connecting hole and / or the second connecting hole.

10. The height clearance detection fixture according to claim 1, characterized in that, The upper ends of the corresponding first connecting hole and / or second connecting hole are blind ends, which do not penetrate the corresponding first horizontal plate part and / or second template part.

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