A device for measuring the inner gap of a rear cover

Abstract

This invention discloses a back cover inner gap measuring device, comprising a fixed block, a measuring block, a mating block, and a first elastic element. The fixed block includes a first block and a second block, with the top ends of the first block and the second block fixedly connected. The bottom surface of the connection between the first block and the second block, the first side surface of the first block, and the first side surface of the second block form a clamping cavity that matches a water guide groove. A first cavity is formed inside the first block, with a first hole on its top surface and a slide and a scale on its second side surface. The first hole, the slide, and the first cavity are all connected. The measuring block includes a moving block. The moving block moves along the z-direction within the first cavity, and its first end face is an inclined surface. An indicator block is fixedly connected to the side surface of the moving block, extending out of the slide and corresponding to the scale. The mating block is disposed on the side of the first end face of the moving block, with the first end face of the mating block parallel to and slidably connected to the first end face of the moving block. The first elastic element is connected between the second end face of the mating block and the inner wall of the first cavity. The device of this application has a simple structure and is easy to operate.

Description

Technical Field

[0001] This invention relates to the technical field of measuring tools, and more specifically, to a device for measuring the inner gap of a rear cover. Background Technology

[0002] During automobile production, it is necessary to monitor the quality of the matching of the inner gap between the rear cover and the body's water channel. However, measuring the specific value of this inner gap requires the rear cover to be closed, which limits the ease of measurement.

[0003] In existing technologies, methods for measuring the internal clearance between the rear cover and the body's water channel include: workers entering the trunk of the body-in-white and using a steel ruler to measure the actual condition at each position. However, the limited space inside the trunk makes this operation very inconvenient for workers, and also poses significant safety hazards such as scratches and bumps, and the measurement results are not accurate enough. There have also been attempts to use electronic internal clearance measuring instruments for online monitoring and measurement, but this requires connection to auxiliary equipment such as computers, making the equipment complex and costly, and it cannot achieve online monitoring and measurement for every car on a mass production line. Summary of the Invention

[0004] To address at least one aspect of the aforementioned problems, the present invention provides a back cover inner gap measuring device, comprising a fixing block, a measuring block, a mating block, and a first elastic element; the fixing block includes a first block and a second block, the top ends of the first block and the second block being fixedly connected; the bottom surface of the connection between the first block and the second block, a first side surface of the first block perpendicular to the x-direction, and a first side surface of the second block perpendicular to the x-direction are arranged to form a clamping cavity, the shape and size of which match the shape and size of the water guide groove at the point to be measured; a first cavity is formed inside the first block, and a first hole is formed on the top surface of the first block, the first hole communicating with the first cavity; a slide rail extending along the z-direction is formed on the second side surface of the first block perpendicular to the x-direction, the slide rail communicating with the first cavity; graduations distributed along the z-direction are provided on the second side surface of the first block at the side of the slide rail; the measuring block includes a moving block; the moving block... The first end face of the block along the y-direction is an inclined plane perpendicular to the yz plane. The moving block is set in the first cavity and moves along the z-direction. Before measurement, the top of the moving block protrudes from the first hole. An indicator block is fixedly connected to the first side of the moving block perpendicular to the x-direction. The indicator block extends from the first cavity with a slide, and the indicator part of the indicator block corresponds to the scale. A mating block is set in the first cavity and located on the side of the first end face of the moving block. The first end face of the mating block is an inclined plane and is parallel to the first end face of the moving block. The first end face of the mating block and the first end face of the moving block are slidably connected along the extension direction of the first end face of the moving block. A first elastic element is set between the second end face of the mating block and the inner wall of the first cavity. The first end of the first elastic element is connected to the second end face of the mating block, and the second end of the first elastic element is connected to the inner wall of the first cavity. The first elastic element is in a compressed state.

[0005] Preferably, the second end face of the moving block along the y direction is an inclined plane perpendicular to the yz plane; two mating blocks are provided, and the two mating blocks are respectively provided on the sides of the first end face and the second end face of the moving block, and the first end face of the two mating blocks is slidably connected to the first end face and the second end face of the moving block respectively; at least two first elastic elements are provided, and the two first elastic elements are respectively connected between the second end face of the two mating blocks and the inner wall of the first cavity.

[0006] Preferably, the moving block is in the shape of an isosceles trapezoid.

[0007] Preferably, it also includes a pull bolt; the pull bolt extends along the y direction, passes through the end face of the first block, is threaded onto the mating block, and is connected to the mating block by threads.

[0008] Preferably, a second cavity is provided on the first block below the first cavity, and the second cavity is connected to the first cavity; a second elastic element is provided in the second cavity, the top end of the second elastic element is connected to the bottom surface of the moving block, and the bottom end of the second elastic element is connected to the inner bottom surface of the second cavity.

[0009] Preferably, the second block has a third cavity, and a second hole is formed on the top surface of the second block, which communicates with the third cavity; the measuring block also includes a stabilizing block and a connecting rod; the stabilizing block is disposed in the third cavity and is slidably connected to the inner wall of the third cavity along the z-direction; one end of the connecting rod passes through the first hole and is fixedly connected to the top of the moving block, and the other end passes through the second hole and is fixedly connected to the top of the stabilizing block; before measurement, the top of the moving block extends out of the first hole through the connecting rod, and the connecting rod is separated from the top surface of the connection between the first block and the second block; a third elastic element is disposed in the third cavity, the top of the third elastic element is connected to the bottom surface of the stabilizing block, and the bottom of the third elastic element is connected to the inner bottom surface of the third cavity.

[0010] Preferably, a protrusion is fixedly connected to the top surface of the connecting rod.

[0011] Preferably, a connecting groove extending along the x-direction is provided on the top surface of the connection between the first block and the second block, and the dimension of the connecting groove along the y-direction matches the dimension of the connecting rod along the y-direction.

[0012] Preferably, the first elastic element is a spring; a connecting post extending along the y direction is fixedly connected to the second end face of the mating block, the first elastic element is sleeved on the connecting post, one end of the first elastic element abuts against the second end face of the mating block, and the other end abuts against the inner wall of the first cavity.

[0013] Preferably, the first cavity extends through the end face of the first block along the y direction; a blocking plate is provided on the end face of the first block, the shape and size of the blocking plate matching the shape and size of the end face of the first block, the blocking plate being detachably connected to the end face of the first block, and the second end of the first elastic member being connected to the inner side of the blocking plate.

[0014] The rear cover inner gap measuring device of the present invention has the following beneficial effects:

[0015] This application designs a clamping cavity on the fixed block, which is used to clamp the device onto the water channel at the measurement point during measurement, thus achieving mutual fixation between the device and the measurement point. A mating block is set within the first cavity via a first elastic element to compress and hold the moving block in position. Before measurement, the top of the moving block is pulled out of the first cavity. During measurement, the rear cover closes and presses against the top of the moving block, causing it to move downwards. The specific value of the gap inside the rear cover can be obtained by reading the indicator block on the moving block and the scale on the first block. Preferably, a pull bolt is provided for adjusting the mating block. The positioning of the moving block makes it convenient and effortless to pull it upwards before measurement. A second elastic element is located below the moving block to automatically spring the moving block back to the measurement position when the mating block is pulled away from the moving block by pulling the bolt before measurement. More preferably, the moving block is designed as an isosceles trapezoid, and the first end faces of the two mating blocks are designed as inclined planes matching the end face of the moving block, allowing the mating blocks to better press the moving block, which helps improve the accuracy of the measurement results. By setting a stabilizing block and a third elastic element inside the second block, which move synchronously with the moving block and the second elastic element via a connecting rod, the stability of the moving block's operation is improved. The measuring device of this application has a simple structure, low cost, easy operation, and accurate measurement results. Attached Figure Description

[0016] To better understand the above and other objects, features, advantages, and functions of the present invention, reference can be made to the embodiments shown in the accompanying drawings. The same reference numerals in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate preferred embodiments of the invention and do not limit the scope of the invention in any way; the parts in the drawings are not drawn to scale.

[0017] Figure 1 A schematic diagram of a rear cover inner gap measuring device according to an embodiment of the present invention is shown;

[0018] Figure 2 An exploded view of a rear cover inner gap measuring device according to an embodiment of the present invention is shown;

[0019] Figure 3 A side view of a rear cover inner clearance measuring device according to an embodiment of the present invention is shown;

[0020] Figure 4 A diagram illustrating the usage state of a rear cover inner gap measuring device according to an embodiment of the present invention is shown.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Fixing block; 11. First block; 111. First cavity; 112. Slide; 113. Second cavity; 1131. Nut hole; 114. Second connecting hole; 12. Second block; 121. Third cavity; 13. Clamping cavity; 14. Connecting groove; 15. Mounting groove; 2. Measuring block; 21. Moving block; 22. Stabilizing block; 23. Connecting rod; 231. Protrusion; 24. Indicating block; 241. Connecting part; 242. Indicating part; 3. Mating block; 31. Connecting column; 32. Threaded hole; 4. Scale plate; 5. Blocking plate; 51. Through hole; 52. First connecting hole; 53. Blind hole; 6. Water guide groove. Detailed Implementation

[0023] The exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0024] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0025] To at least partially address one or more of the aforementioned problems and other potential issues, embodiments of this disclosure provide a rear cover inner clearance measuring device, such as... Figures 1 to 4 As shown, it includes a fixing block 1, a measuring block 2, a mating block 3, and a first elastic element.

[0026] The fixed block 1 includes a first block 11 and a second block 12, and the fixed block 1 is preferably integrally formed; the first block 11 and the second block 12 are arranged opposite to each other, the dimension of the first block 11 along the z direction matches the dimension of the second block 12 along the z direction, the top ends of the first block 11 and the second block 12 are fixedly connected, so that the top surfaces of the first block 11 and the second block 12 are on the same plane; the first side surfaces of the adjacent first block 11 and the second block 12 are both vertical surfaces, and the bottom surface at the connection of the first block 11 and the second block 12, the first side surface of the first block 11 perpendicular to the x direction, and the first side surface of the second block 12 perpendicular to the x direction enclose a clamping cavity 13 with a cross-section in the shape of "n". The shape and size of the clamping cavity 13 match the shape and size of the water guide groove 6 at the measurement location. Preferably, the lower part of the first side surface of the first block 11 is an inclined surface that gradually moves away from the second block 12 from top to bottom, and the lower part of the first side surface of the second block 12 is an inclined surface that gradually moves away from the first block 11 from top to bottom, so that the cross-section of the clamping cavity 13 is in the shape of "∟", as Figure 3 shown, which facilitates the installation of the device of the present application on the water guide groove 6 at the measurement location.

[0027] A first cavity 111 is formed in the first block 11, and a first hole is formed on the top surface of the first block 11. The first hole is connected to the first cavity 111. A slideway 112 extending along the z direction is formed on the second side surface of the first block 11 perpendicular to the x direction, and the slideway 112 is connected to the first cavity 111; scales distributed along the z direction are provided on the second side surface of the first block 11 at the side of the slideway 112. In a specific embodiment, installation grooves 15 are formed on both sides of the slideway 112 on the second side surface of the first block 11, and scale plates 4 are connected in the installation grooves 15. Scales distributed along the z direction are marked on the scale plates 4; in another specific embodiment, the scales are marked on the second side surface of the first block 11.

[0028] In a preferred embodiment, the first cavity 111 penetrates through the two end faces of the first block 11 along the y direction, as Figure 2 shown. Plug plates 5 are provided on both end faces of the first block 11. The shape and size of the plug plates 5 match the shape and size of the end faces of the first block 11, and the plug plates 5 are detachably connected to the end faces of the first block 11. Specifically, a plurality of first connection holes 52 are formed on the plug plates 5, and a plurality of second connection holes 114 are formed on the end faces of the first block 11. The plurality of first connection holes 52 correspond to the plurality of second connection holes 114 one by one; a plurality of connection bolts are provided on the plug plates 5. The connection bolts penetrate through the first connection holes 52 and are inserted into the second connection holes 114 and are threadedly connected to the second connection holes 114.

[0029] The measuring block 2 includes a moving block 21; the moving block 21 is in the shape of a right trapezoid, and the first end face of the moving block 21 along the y direction is an inclined plane perpendicular to the yz plane, or the moving block 21 is in the shape of an isosceles trapezoid, and the first end face and the second end face of the moving block 21 along the y direction are both inclined planes perpendicular to the yz plane. In a preferred embodiment, the moving block 21 is in the shape of an isosceles trapezoid; the moving block 21 is disposed in the first cavity 111 and moves along the z direction. Specifically, when the moving block 21 is in the shape of a right trapezoid, the second end face of the moving block 21 and the two sides of the moving block 21 along the x direction are slidably connected to the inner wall of the first cavity 111 along the z direction; when the moving block 21 is in the shape of an isosceles trapezoid, the two sides of the moving block 21 along the x direction are slidably connected to the inner wall of the first cavity 111 along the z direction; before measurement, the top end of the moving block 21 protrudes from the first hole.

[0030] An indicator block 24 is fixedly connected to the first side of the moving block 21 perpendicular to the x-direction. The indicator block 24 extends from the first cavity 111 into a slide 112. The indicator part 242 of the indicator block 24 corresponds to the scale. Specifically, the indicator block 24 includes a connecting part 241 and an indicator part 242. The connecting part 241 is a rectangular block, and its size matches the size of the slide 112. The first side of the connecting part 241 is fixedly connected to the first side of the moving block 21. The connecting part 241 is disposed in the slide 112 and slides along the z-direction in the slide 112. The indicator part 242 is a rhombus-shaped block, and its first side is fixedly connected to the second side of the connecting part 241. The tip of the indicator part 242 corresponds to the scale.

[0031] When the moving block 21 is in the shape of a right trapezoid, one mating block 3 is provided. The mating block 3 is located in the first cavity 111 and on the side of the first end face of the moving block 21. The first end face of the mating block 3 is an inclined surface and is parallel to the first end face of the moving block 21. The first end face of the mating block 3 and the first end face of the moving block 21 are slidably connected along the extension direction of the first end face of the moving block 21. When the moving block 21 is in the shape of an isosceles trapezoid, two mating blocks 3 are provided. Both mating blocks 3 are located in the first cavity 111 and are respectively located on the side of the first end face and the second end face of the moving block 21. The first end faces of both mating blocks 3 are inclined surfaces and are parallel to the first end face and the second end face of the moving block 21, respectively. The first end faces of both mating blocks 3 are slidably connected to the first end face and the second end face of the moving block 21, respectively.

[0032] When there is one mating block 3, the first elastic element is disposed between the second end face of the mating block 3 and the inner wall of the first cavity 111; when there are two mating blocks 3, there are at least two first elastic elements, and the two first elastic elements are respectively connected between the second end face of the two mating blocks 3 and the inner wall of the first cavity 111; the first end of the first elastic element is connected to the second end face of the mating block 3, and the second end of the first elastic element is connected to the inner wall of the first cavity 111, and the first elastic element is in a compressed state. The first elastic element is a spring or a rubber block. In a specific embodiment, the first elastic element is a spring. Preferably, each mating block 3 is provided with two first elastic elements, and two connecting posts 31 extending along the y direction are fixedly connected to the second end face of the mating block 3. The two first elastic elements are respectively sleeved on the two connecting posts 31, one end of the first elastic element abuts against the second end face of the mating block 3, and the other end abuts against the inner wall of the first cavity 111. In some embodiments, a blocking plate 5 is connected to the end of the first block 11, and two blind holes 53 are formed on the inner side of the blocking plate 5. The two blind holes 53 correspond to two first elastic members respectively, and the other ends of the two first elastic members are located in the two blind holes 53 respectively.

[0033] In a preferred embodiment, the device further includes a pull bolt, the number of which is equal to the number of mating blocks 3. The pull bolt extends along the y-direction, passes through the end face of the first block 11, passes through the mating block 3, and is threadedly connected to the mating block 3. In some embodiments, a blocking plate 5 is connected to the end of the first block 11. The blocking plate 5 has a through hole 51, and the mating block 3 has a threaded hole 32. The through hole 51 corresponds to the threaded hole 32. The pull bolt passes through the through hole 51 and passes through the threaded hole 32, and is threadedly connected to the threaded hole 32. More preferably, a second cavity 113 is provided on the first block 11 below the first cavity 111, and the second cavity 113 is connected to the first cavity 111. Preferably, the second cavity 113 penetrates the second side surface of the first block 11. A second elastic element is provided in the second cavity 113. The second elastic element is preferably a spring. The top end of the second elastic element is connected to the bottom surface of the moving block 21, and the bottom end of the second elastic element is connected to the inner bottom surface of the second cavity 113. In some embodiments, since the second cavity 113 is provided on the first block 11, the connection length between the connecting bolt and the first block 11 is short. Nut holes 1131 are respectively provided on the inner sidewalls of both ends of the second cavity 113 along the y direction. The nut holes 1131 are connected to the second connecting hole 114 located at the bottom end of the first block 11. A nut is connected in the nut hole 1131. The connecting bolt passes through the first connecting hole 52 and the second connecting hole 114 and is threaded into the nut.

[0034] In a preferred embodiment, a third cavity 121 is provided inside the second block 12, and a second hole is provided on the top surface of the second block 12, which is connected to the third cavity 121; the measuring block 2 also includes a stabilizing block 22 and a connecting rod 23, and the measuring block 2 is preferably integrally formed; the stabilizing block 22 is disposed in the third cavity 121 and is slidably connected to the inner wall of the third cavity 121 along the z direction; one end of the connecting rod 23 passes through the first hole and is fixedly connected to the top of the moving block 21, and the other end passes through the second hole and is fixedly connected to the top of the stabilizing block 22; preferably, a protrusion 231 is fixedly connected to the middle of the top surface of the connecting rod 23; before measurement, the top of the moving block 21 extends out of the first hole through the connecting rod 23, and the connecting rod 23 is separated from the top surface of the connection between the first block 11 and the second block 12; a third elastic element is provided in the third cavity 121, which is preferably a spring, the top of the third elastic element is connected to the bottom surface of the stabilizing block 22, and the bottom of the third elastic element is connected to the inner bottom surface of the third cavity 121. Preferably, a connecting groove 14 extending along the x-direction is provided on the top surface of the connection between the first block 11 and the second block 12, and the dimension of the connecting groove 14 along the y-direction matches the dimension of the connecting rod 23 along the y-direction.

[0035] The process of using the measuring device of this application is as follows: Before measurement, the mating block 3 is pulled away from the moving block 21 by pulling the bolt, so that the mating block 3 is separated from the moving block 21. Under the action of the second elastic element and the third elastic element, the moving block 21 and the stabilizing block 22 automatically spring to the position to be measured. Then, the pulling bolt is removed so that the mating block 3 and the moving block 21 abut against each other. During measurement, the measuring device of this application is installed on the water guide 6 at the location to be measured through the clamping cavity 13. During the closing process of the back cover, the back cover presses the protrusion 231 so that the moving block 21 moves downward. When the back cover is closed, the moving block 21 is pressed and kept still under the action of the first elastic element and the mating block 3. Then the back cover is opened and the measuring device of this application is removed. The specific value of the gap inside the back cover is read through the indicator block 24 and the scale.

[0036] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand this document.

Claims

1. A device for measuring the inner gap of a rear cover, characterized in that: It includes a fixing block (1), a measuring block (2), a mating block (3), and a first elastic element; The fixing block (1) includes a first block (11) and a second block (12). The top of the first block (11) and the top of the second block (12) are fixedly connected. The bottom surface of the connection between the first block (11) and the second block (12), the first side surface of the first block (11) perpendicular to the x-direction, and the first side surface of the second block (12) perpendicular to the x-direction form a clamping cavity (13). The shape and size of the clamping cavity (13) match the shape and size of the water guide groove (6) at the point to be measured. A first cavity (111) is opened inside the first block (11). A first hole is opened on the top surface of the first block (11). The first hole is connected to the first cavity (111). A slide (112) extending along the z-direction is opened on the second side surface of the first block (11) perpendicular to the x-direction. The slide (112) is connected to the first cavity (111). A scale distributed along the z-direction is provided on the second side surface of the first block (11) at the side of the slide (112). The measuring block (2) includes a moving block (21); the first end face of the moving block (21) along the y direction is an inclined plane perpendicular to the yz plane, the moving block (21) is set in the first cavity (111) and moves along the z direction, before measurement, the top end of the moving block (21) protrudes out of the first hole; an indicator block (24) is fixedly connected to the first side of the moving block (21) perpendicular to the x direction, the indicator block (24) extends a slide (112) from the first cavity (111), and the indicator part (242) of the indicator block (24) corresponds to the scale; The mating block (3) is located in the first cavity (111) and on the side of the first end face of the moving block (21). The first end face of the mating block (3) is an inclined surface. The first end face of the mating block (3) is parallel to the first end face of the moving block (21). The first end face of the mating block (3) and the first end face of the moving block (21) are slidably connected along the extension direction of the first end face of the moving block (21). The first elastic element is disposed between the second end face of the mating block (3) and the inner wall of the first cavity (111). The first end of the first elastic element is connected to the second end face of the mating block (3), and the second end of the first elastic element is connected to the inner wall of the first cavity (111). The first elastic element is in a compressed state.

2. The rear cover inner gap measuring device according to claim 1, characterized in that: The second end face of the moving block (21) along the y direction is an inclined plane perpendicular to the yz plane; two mating blocks (3) are provided, and the two mating blocks (3) are respectively provided on the side of the first end face and the second end face of the moving block (21), and the first end face of the two mating blocks (3) is slidably connected to the first end face and the second end face of the moving block (21); at least two first elastic elements are provided, and the two first elastic elements are respectively connected between the second end face of the two mating blocks (3) and the inner wall of the first cavity (111).

3. The rear cover inner gap measuring device according to claim 2, characterized in that: The moving block (21) is in the shape of an isosceles trapezoid.

4. A rear cover inner gap measuring device according to claim 1 or 2, characterized in that: It also includes a pull bolt; the pull bolt extends along the y direction, passes through the end face of the first block (11), passes through the mating block (3) and is threadedly connected to the mating block (3).

5. The rear cover inner gap measuring device according to claim 4, characterized in that: The first block (11) has a second cavity (113) below the first cavity (111), and the second cavity (113) is connected to the first cavity (111); a second elastic element is provided in the second cavity (113), the top end of the second elastic element is connected to the bottom surface of the moving block (21), and the bottom end of the second elastic element is connected to the inner bottom surface of the second cavity (113).

6. The rear cover inner gap measuring device according to claim 1, characterized in that: The second block (12) has a third cavity (121) inside, and a second hole is opened on the top surface of the second block (12), which is connected to the third cavity (121). The measuring block (2) also includes a stabilizing block (22) and a connecting rod (23). The stabilizing block (22) is set in the third cavity (121) and is slidably connected to the inner wall of the third cavity (121) along the z direction. One end of the connecting rod (23) passes through the first hole and is fixedly connected to the top of the moving block (21), and the other end passes through the second hole and is fixedly connected to the top of the stabilizing block (22). Before measurement, the top of the moving block (21) extends out of the first hole through the connecting rod (23), and the connecting rod (23) is separated from the top surface of the connection between the first block (11) and the second block (12). A third elastic element is provided in the third cavity (121). The top of the third elastic element is connected to the bottom surface of the stabilizing block (22), and the bottom end of the third elastic element is connected to the inner bottom surface of the third cavity (121).

7. The rear cover inner gap measuring device according to claim 6, characterized in that: A protrusion (231) is fixedly connected to the top surface of the connecting rod (23).

8. The rear cover inner gap measuring device according to claim 6, characterized in that: A connecting groove (14) extending along the x-direction is provided on the top surface at the connection between the first block (11) and the second block (12). The dimension of the connecting groove (14) along the y-direction matches the dimension of the connecting rod (23) along the y-direction.

9. The rear cover inner gap measuring device according to claim 1, characterized in that: The first elastic element is a spring; a connecting post (31) extending along the y direction is fixedly connected to the second end face of the mating block (3), the first elastic element is sleeved on the connecting post (31), one end of the first elastic element abuts against the second end face of the mating block (3), and the other end abuts against the inner wall of the first cavity (111).

10. The rear cover inner gap measuring device according to claim 1, characterized in that: The first cavity (111) extends through the end face of the first block (11) along the y direction; a blocking plate (5) is provided on the end face of the first block (11), the shape and size of the blocking plate (5) match the shape and size of the end face of the first block (11), the blocking plate (5) is detachably connected to the end face of the first block (11), and the second end of the first elastic member is connected to the inner side of the blocking plate (5).

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