Rear cover inner gap measuring device

Abstract

The invention discloses a rear cover inner gap measuring device which comprises a fixing block, a measuring block, a matching block and a first elastic piece. The fixing block comprises a first block and a second block, the top end of the first block is fixedly connected with the top end of the second block, and a clamping cavity matched with the water chute is defined by the bottom face of the joint of the first block and the second block, the first side face of the first block and the first side face of the second block; a first cavity is formed in the first block, a first hole is formed in the top face of the first block, a sliding way and scales are arranged on the second side face of the first block, and the first hole, the sliding way and the first cavity are all communicated. The measuring block comprises a moving block; the moving block moves in the first cavity in the z direction, and the first end face of the moving block is an inclined face. The side face of the moving block is fixedly connected with an indicating block which extends out of the sliding way and corresponds to the scales. The matching block is arranged on the side edge of the first end face of the moving block. The first end face of the matching block and the first end face of the moving block are parallel and slidably connected. The first elastic piece is connected between the second end face of the matching block and the inner wall of the first cavity. The device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring tools, and in particular to a device for measuring the inner gap of a rear cover. Background Art

[0002] During the automobile production process, the matching state of the inner gap between the rear cover and the water channel of the vehicle body needs to be monitored. Since the rear cover needs to be in a closed state when measuring the specific value of the inner gap between the rear cover and the water channel of the vehicle body, the convenience of measurement is limited.

[0003] In the prior art, the method used to measure the internal gap between the rear cover and the water channel of the vehicle body is: the staff enters the trunk of the white body and uses a steel ruler to measure the actual status one by one inside the vehicle. However, the internal space of the trunk is limited, which is very inconvenient for the staff to operate. There are also great safety hazards such as scratches and bumps, and the measurement results are not accurate enough. There are also attempts to use electronic internal gap measuring instruments for online monitoring and measurement, but because it needs to be connected to auxiliary equipment such as computers, the equipment is complex and costly, and it is impossible to achieve online monitoring and measurement of each vehicle on a batch production line. Summary of the invention

[0004] To solve at least one aspect of the above problems, the present invention provides a device for measuring the gap inside a rear cover, comprising a fixed block, a measuring block, a matching block and a first elastic member; the fixed block comprises a first block and a second block, the top of the first block and the top of the second block are fixedly connected, the bottom surface of the connection between the first block and the second block, the first side surface of the first block perpendicular to the x direction and the first side surface of the second block perpendicular to the x direction are surrounded by a clamping cavity, the shape and size of the clamping cavity match the shape and size of the water guide groove at the location to be measured; a first cavity is provided in the first block, a first hole is provided on the top surface of the first block, and the first hole is connected to the first cavity; a slideway extending along the z direction is provided on the second side surface of the first block perpendicular to the x direction, and the slideway is connected to the first cavity; a scale distributed along the z direction is provided on the side of the slideway on the second side surface of the first block; the measuring block comprises a moving block; ... The first end face of the block along the y direction is an inclined surface perpendicular to the yz plane. The moving block is arranged in the first cavity and moves along the z direction. Before measurement, the top end of the moving block extends out of the first hole; an indicating block is fixedly connected to the first side face of the moving block perpendicular to the x direction. The indicating block extends a slideway from the first cavity, and the indicating part of the indicating block corresponds to the scale; the matching block is arranged in the first cavity and is located on the side of the first end face of the moving block. The first end face of the matching block is an inclined surface. The first end face of the matching block is parallel to the first end face of the moving block. The first end face of the matching block is slidably connected to the first end face of the moving block along the extension direction of the first end face of the moving block; the first elastic member is arranged between the second end face of the matching block and the inner wall of the first cavity, the first end of the first elastic member is connected to the second end face of the matching block, the second end of the first elastic member is connected to the inner wall of the first cavity, and the first elastic member is in a compressed state.

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

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

[0007] Preferably, it also includes a pulling bolt; the pulling bolt extends along the y direction, passes through the end surface of the first block, is inserted into the matching block and is threadedly connected with the matching block.

[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 member is provided in the second cavity, the top end of the second elastic member is connected to the bottom surface of the moving block, and the bottom end of the second elastic member is connected to the inner bottom surface of the second cavity.

[0009] Preferably, a third cavity is provided in the second block, a second hole is provided on the top surface of the second block, and the second hole is connected to the third cavity; the measuring block also includes a stabilizing block and a connecting rod; the stabilizing block is arranged 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 member is provided in the third cavity, the top of the third elastic member is connected to the bottom surface of the stabilizing block, and the bottom end of the third elastic member 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 connection 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 connection groove along the y-direction matches the dimension of the connection rod along the y-direction.

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

[0013] Preferably, the first cavity passes 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 match the shape and size of the end face of the first block, the blocking plate is detachably connected to the end face of the first block, and the second end of the first elastic member is connected to the inner side surface of the blocking plate.

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

[0015] The present application designs a clamping cavity on the fixed block, which is used to clamp the water guide groove at the place to be measured through the clamping cavity during measurement, so as to achieve mutual fixation between the present application device and the place to be measured; a matching block is set in the first cavity through the first elastic member, which is used to squeeze the moving block that moves up and down to maintain the position of the moving block, and the top of the moving block is pulled out of the first cavity before measurement. During measurement, the back cover is closed and pressed on the top of the moving block to make the moving block move downward, and the specific value of the gap in the back cover can be known by reading the indicator block on the moving block and the scale on the first block; preferably, a pull bolt is set to adjust the matching block The position makes it convenient and labor-saving to pull the moving block upward before measurement, and a second elastic member is arranged below the moving block, which is used to automatically bounce the moving block to the position to be measured when the matching block is pulled away from the moving block by pulling the bolt before measurement; more preferably, the moving block is designed to be an isosceles trapezoid, and the first end faces of the two matching blocks are designed to be inclined surfaces that match the end faces of the moving blocks, so that the matching blocks can better press the moving block, which is helpful for the accuracy of the measurement results; by arranging a stabilizing block and a third elastic member in the second block to move synchronously with the moving block and the second elastic member through a connecting rod, it is helpful for the moving block to run stably. The measuring device of the present application has a simple structure, low cost, easy operation, and accurate measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0017] Figure 1 A schematic structural 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 gap measuring device according to an embodiment of the present invention is shown;

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

[0021] Description of reference numerals:

[0022] 1. Fixed block; 11. First block; 111. First cavity; 112. Slideway; 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. Boss; 24. Indicating block; 241. Connecting part; 242. Indicating part; 3. Matching 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 DESCRIPTION

[0023] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0024] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an 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] In order to at least partially solve the above problems and one or more of other potential problems, the embodiments of the present disclosure provide a back cover inner gap measuring device, such as Figures 1 to 4 As shown, it includes a fixing block 1, a measuring block 2, a matching block 3 and a first elastic member.

[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, and the size of the first block 11 along the z direction matches the size of the second block 12 along the z direction, and the top of the first block 11 and the top of the second block 12 are fixedly connected, so that the top surface of the first block 11 and the top surface of the second block 12 are in the same plane; the adjacent first side surfaces of the first block 11 and the second side surfaces of the second block 12 are both vertical surfaces, and 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 are surrounded to form a clamping cavity 13 with an "n"-shaped cross section, and the shape and size of the clamping cavity 13 match the shape and size of the water guide groove 6 at the location to be measured. Preferably, the lower part of the first side surface of the first block 11 is an inclined surface gradually 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 gradually 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 a "J". Figure 3 As shown, it is convenient to install the device of the present application on the water channel 6 at the location to be measured.

[0027] A first cavity 111 is provided in the first block 11, and a first hole is provided on the top surface of the first block 11, and the first hole is connected to the first cavity 111. A slideway 112 extending along the z direction is provided 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 side of the slideway 112 on the second side surface of the first block 11. In a specific embodiment, mounting grooves 15 are provided on both sides of the slideway 112 on the second side surface of the first block 11, and a scale plate 4 is connected in the mounting groove 15, and the scale plate 4 is engraved with scales distributed along the z direction; in another specific embodiment, the scales are engraved on the second side surface of the first block 11.

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

[0029] The measuring block 2 includes a moving block 21; the moving block 21 is in the shape of a right-angled trapezoid, and the first end face of the moving block 21 along the y direction is an inclined surface 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 surfaces 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 arranged in the first cavity 111 and moves along the z direction. Specifically, when the moving block 21 is in the shape of a right-angled trapezoid, the second end face of the moving block 21 and the two side faces of the moving block 21 along the x direction are respectively connected to the inner wall of the first cavity 111 in a sliding manner along the z direction; when the moving block 21 is in the shape of an isosceles trapezoid, the two side faces of the moving block 21 along the x direction are respectively connected to the inner wall of the first cavity 111 in a sliding manner along the z direction; before measurement, the top of the moving block 21 extends out of the first hole.

[0030] An indicating block 24 is fixedly connected to the first side surface of the moving block 21 perpendicular to the x-direction. The indicating block 24 extends out of the slide 112 from the first cavity 111. The indicating portion 242 of the indicating block 24 corresponds to the scale. Specifically, the indicating block 24 includes a connecting portion 241 and an indicating portion 242. The connecting portion 241 is a rectangular block. The size of the connecting portion 241 matches the size of the slide 112. The first side surface of the connecting portion 241 is fixedly connected to the first side surface of the moving block 21. The connecting portion 241 is arranged in the slide 112 and is slidably connected to the slide 112 along the z-direction in the slide 112. The indicating portion 242 is a rhombus block. The first side surface of the indicating portion 242 is fixedly connected to the second side surface of the connecting portion 241. The tip of the indicating portion 242 corresponds to the scale.

[0031] When the moving block 21 is in the shape of a right-angled trapezoid, one matching block 3 is provided, the matching block 3 is arranged in the first cavity 111 and is located on the side of the first end face of the moving block 21, the first end face of the matching block 3 is an inclined surface, the first end face of the matching block 3 is parallel to the first end face of the moving block 21, and the first end face of the matching block 3 is slidably connected to the first end face of the moving block 21 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 matching blocks 3 are provided, both of which are arranged in the first cavity 111 and are respectively arranged on the sides of the first end face and the second end face of the moving block 21, the first end faces of the two matching blocks 3 are both inclined surfaces, the first end faces of the two matching blocks 3 are respectively parallel to the first end face and the second end face of the moving block 21, and the first end faces of the two matching blocks 3 are respectively slidably connected to the first end face and the second end face of the moving block 21.

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

[0033] In a preferred embodiment, the device of the present application also includes a pulling bolt, the number of which is equal to the number of matching blocks 3, and the pulling bolts extend along the y direction. The pulling bolts pass through the end face of the first block 11, are arranged on the matching block 3 and are threadedly connected to the matching block 3; in some embodiments, a blocking plate 5 is connected to the end of the first block 11, a through hole 51 is provided on the blocking plate 5, and a threaded hole 32 is provided on the matching block 3, and the through hole 51 corresponds to the threaded hole 32. The pulling bolt passes through the through hole 51, is arranged in 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 passes through the second side surface of the first block 11; a second elastic member is provided in the second cavity 113, and the second elastic member is preferably a spring, the top end of the second elastic member is connected to the bottom surface of the moving block 21, and the bottom end of the second elastic member 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 of the connecting bolt and the first block 11 is short, and nut holes 1131 are respectively provided on the inner side walls at both ends of the second cavity 113 along the y direction, and the nut holes 1131 are connected to the second connecting hole 114 located at the bottom end of the first block 11, and a nut is connected to the nut hole 1131, and the connecting bolt passes through the first connecting hole 52 and the second connecting hole 114 at the same time, is penetrated into the nut, and is threadedly connected to the nut.

[0034] In a preferred embodiment, a third cavity 121 is provided in the second block 12, and a second hole is provided on the top surface of the second block 12, and the second hole 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 arranged 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 in 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 member is provided in the third cavity 121, and the third elastic member is preferably a spring, the top of the third elastic member is connected to the bottom surface of the stabilizing block 22, and the bottom of the third elastic member is connected to the inner bottom surface of the third cavity 121. Preferably, a connection 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 connection groove 14 along the y-direction matches the dimension of the connection rod 23 along the y-direction.

[0035] The use process of the measuring device of the present application is as follows: before measurement, the matching block 3 is pulled in a direction away from the moving block 21 by pulling the bolt, so that the matching block 3 is separated from the moving block 21, and the moving block 21 and the stabilizing block 22 automatically bounce to the position to be measured under the action of the second elastic member and the third elastic member, and then the pulling bolt is removed to make the matching block 3 abut against the moving block 21; during measurement, the measuring device of the present application is installed on the water guide groove 6 at the position to be measured through the clamping cavity 13, and during the process of closing the rear cover, the rear cover presses the protrusion 231 to make the moving block 21 move downward, and when the rear cover is closed, the moving block 21 is pressed and kept stationary under the action of the first elastic member and the matching block 3, and then the rear cover is opened, and the measuring device of the present application is removed to read the specific value of the gap inside the rear cover through the indicating block 24 and the scale.

[0036] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the present invention.

Claims

1. A device for measuring the gap inside a rear cover, characterized in that: It comprises a fixing block (1), a measuring block (2), a matching block (3) and a first elastic member; The fixed block (1) comprises 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 are arranged to 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 location to be measured; a first cavity (111) is provided in the first block (11), a first hole is provided on the top surface of the first block (11), and the first hole is connected to the first cavity (111); a slideway (112) extending along the z-direction is provided 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); and scales distributed along the z-direction are arranged on the side of the slideway (112) on the second side surface of the first block (11); The measuring block (2) comprises a moving block (21); a first end face of the moving block (21) along the y direction is an inclined surface perpendicular to the yz plane; the moving block (21) is arranged in the first cavity (111) and moves along the z direction; before measurement, the top end of the moving block (21) extends out of the first hole; an indicating block (24) is fixedly connected to a first side face of the moving block (21) perpendicular to the x direction; the indicating block (24) extends out of a slideway (112) from the first cavity (111); and an indicating portion (242) of the indicating block (24) corresponds to a scale; The matching block (3) is arranged in the first cavity (111) and is located on the side of the first end face of the moving block (21); the first end face of the matching block (3) is an inclined surface; the first end face of the matching block (3) is parallel to the first end face of the moving block (21); the first end face of the matching 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 member is arranged between the second end surface of the matching block (3) and the inner wall of the first cavity (111), the first end of the first elastic member is connected to the second end surface of the matching block (3), the second end of the first elastic member is connected to the inner wall of the first cavity (111), and the first elastic member 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 surface perpendicular to the yz plane; two matching blocks (3) are provided, and the two matching blocks (3) are respectively provided on the sides of the first end face and the second end face of the moving block (21), and the first end faces of the two matching blocks (3) are respectively slidably connected to the first end face and the second end face of the moving block (21); at least two first elastic members are provided, and the two first elastic members are respectively connected between the second end faces of the two matching 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 pulling bolt; the pulling bolt extends along the y direction, passes through the end surface of the first block (11), is inserted into the matching block (3) and is threadedly connected to the matching block (3).

5. The rear cover inner gap measuring device according to claim 4, characterized in that: A second cavity (113) is provided on the first block (11) below the first cavity (111), and the second cavity (113) is communicated with the first cavity (111); a second elastic member is provided in the second cavity (113), the top end of the second elastic member is connected to the bottom surface of the moving block (21), and the bottom end of the second elastic member 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: A third cavity (121) is provided in the second block (12), a second hole is provided on the top surface of the second block (12), and the second hole is communicated with the third cavity (121); the measuring block (2) further comprises a stabilizing block (22) and a connecting rod (23); the stabilizing block (22) is arranged 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 top surface of the connecting rod (23) at the connection between the first block (11) and the second block (12) is separated; a third elastic member is provided in the third cavity (121), the top of the third elastic member is connected to the bottom surface of the stabilizing block (22), and the bottom of the third elastic member 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 connection groove (14) extending along the x-direction is provided on the top surface of the connection point between the first block (11) and the second block (12), and the dimension of the connection groove (14) along the y-direction matches the dimension of the connection rod (23) along the y-direction.

9. The rear cover inner gap measuring device according to claim 1, characterized in that: The first elastic member is a spring; a connecting column (31) extending along the y direction is fixedly connected to the second end face of the matching block (3); the first elastic member is sleeved on the connecting column (31); one end of the first elastic member abuts against the second end face of the matching 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) passes 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 face of the blocking plate (5).

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