Distance detection device

Abstract

The utility model discloses a distance detection device, which relates to the technical field of vehicle detection and comprises a main ruler, a detector and a measuring assembly. Wherein the detector comprises a main body and a display module, the main body is slidably mounted on the main ruler, and the display module is used for displaying the displacement of the main body relative to the main ruler; the measuring assembly is installed on the main body and synchronously moves along with the main body, the measuring assembly comprises a circular truncated cone plug gauge, the circular truncated cone plug gauge comprises a measuring part, the measuring part is of a regular circular truncated cone structure and comprises a first end face and a second end face which are oppositely arranged, the axis of the measuring part is parallel to the extending direction of the main ruler, and the diameter of the first end face is smaller than that of the second end face; the first end face is disposed away from the body. According to the scheme, the to-be-detected width value can be obtained through conversion only by detecting the depth of the circular truncated cone plug gauge extending into the detected hole or gap, and a worker does not need to look down or side to read during detection, so that reading errors are avoided, and the reliability of detection data is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle detection technical field, especially a distance detection device. BACKGROUND

[0002] In the detection stage of the vehicle, it is usually required to detect whether the hole diameter in the vehicle part and the gap between the vehicle parts meet the design requirements, and the detection method for the gap width and the hole diameter between the vehicle parts is generally to measure by using a plug gauge or a plug gauge. When measuring by using the plug gauge, due to the limitation of the vehicle structure, the detection personnel can only view or side the scale line on the surface of the plug gauge, remember the value and then record by using paper and pen, and the reading error is caused by viewing or side reading. When detecting by using the plug gauge, only the interval range of the gap width or the hole diameter can be measured, and the accurate value cannot be accurately measured. Therefore, the accuracy of the traditional detection method is low, and the process of manually reading data and inputting data is prone to error, so that the detection data is unreliable, and the effectiveness of the detection data is affected.

[0003] In view of this, the utility model provides a distance detection device to solve or at least alleviate the above technical problems. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a distance detection device, which aims to solve the technical problem that the detection data is unreliable when detecting the gap width or the hole diameter of the vehicle part by using the traditional detection method.

[0005] To achieve the above purpose, the utility model provides a distance detection device, which comprises:

[0006] A main ruler;

[0007] A detector, the detector comprises a main body and a display module, the main body is slidingly installed on the main ruler, and the display module is used for displaying the displacement of the main body relative to the main ruler;

[0008] A measuring assembly, the measuring assembly is installed on the main body and moves synchronously with the main body, the measuring assembly comprises a circular truncated cone plug gauge, the circular truncated cone plug gauge comprises a measuring part, the measuring part is a right circular truncated cone structure, the measuring part comprises oppositely arranged first and second end faces, the axis of the measuring part is parallel to the extension direction of the main ruler, the diameter of the first end face is smaller than that of the second end face, and the first end face is arranged away from the main body.

[0009] In an embodiment, the detector further comprises a wireless module, the wireless module is installed on the main body, and the wireless module is used for sending the displacement of the main body relative to the main ruler to an external information processing device.

[0010] In an embodiment, the first end face has a diameter of D1, the second end face has a diameter of D2, and the distance between the first end face and the second end face is L;

[0011] The D1, D2 and L satisfy 1

[0012] In an embodiment, the measuring assembly comprises a side arm and a mounting base, one end of the side arm is mounted to the main body, the mounting base is slidingly mounted to the side arm, and the circular cone plug gauge is mounted to the mounting base and moves synchronously with the mounting base.

[0013] In an embodiment, the circular cone plug gauge further comprises a mounting portion connected to the second end face, the mounting portion is provided with external threads, the mounting base is provided with a threaded hole, the inside of the threaded hole is provided with internal threads, and the external threads and the internal threads are arranged in a matched manner, so that the circular cone plug gauge is mounted to the mounting base.

[0014] In an embodiment, the circular cone plug gauge further comprises a mounting portion connected to the second end face, the mounting portion is provided with an arc-shaped clamping groove, the mounting base is provided with a mounting hole, and a side wall of the mounting hole is provided with an arc-shaped protrusion, the arc-shaped clamping groove and the arc-shaped protrusion are arranged in a matched manner, so that the circular cone plug gauge is mounted to the mounting base.

[0015] In an embodiment, the measuring assembly further comprises a locking screw, the mounting base is provided with a locking through hole, the locking screw is mounted to the locking through hole, and the locking screw is turned to press the side arm towards or away from the end of the side arm.

[0016] In an embodiment, the distance detection device further comprises a measuring base, the measuring base is mounted to one end of the main ruler, one side of the measuring base away from the main ruler is provided with a measuring base surface, and the measuring base surface is perpendicular to the extension direction of the main ruler.

[0017] In an embodiment, the distance detection device further comprises an end limiting piece, the end limiting piece is mounted to one end of the main ruler away from the measuring base, and the end limiting piece is used to limit the sliding range of the main body in cooperation with the measuring base.

[0018] In an embodiment, the detector further comprises a fastening screw, the main body is provided with a fastening through hole, the fastening screw is mounted to the fastening through hole, and the fastening screw is turned to press the main ruler towards or away from the end of the main ruler.

[0019] According to the technical scheme provided by the utility model, distance detection device includes main ruler, detector and measurement component. Among them, the detector includes main body and display module, the main body is installed in the main ruler, and the display module is used for displaying the displacement of the main body relative to the main ruler, the measurement component is installed on the main body and moves synchronously with the main body, the measurement component includes a circular table plug gauge, the circular table plug gauge includes a measuring part, the measuring part is a positive circular table structure, the measuring part includes oppositely arranged first end face and second end face, the axis of the measuring part is parallel to the extension direction of the main ruler, the diameter of the first end face is smaller than the diameter of the second end face, and the first end face is away from the main body. Through the setting, when detecting the hole diameter or the gap width, the main ruler is erected on the surface near the measured hole or gap, the surface is taken as the reference surface, the circular table plug gauge is vertically inserted into the hole or the gap by moving the main body, until the surface of the circular table plug gauge is attached to the hole or the gap, the depth of the circular table plug gauge inserted into the hole or the gap can be directly displayed by the display module, manual observation of the scale line is not needed, thereby the reading error is avoided, and the diameter of the measured hole or the width of the measured gap can be converted according to the numerical value of the insertion depth, the diameter of the first end face and the second end face, and the distance between the first end face and the second end face. The diameter of the measured hole or the width of the measured gap is converted by measuring the depth inserted into the measured hole or the measured gap, the reading of the detection personnel is not needed during the detection process, only the depth numerical value displayed in the display module needs to be directly read, thereby the phenomenon of misreading and misreading of the detection personnel is reduced, the reading error is avoided, and the reliability of the detection data is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creating labor.

[0021] Figure 1 The structural schematic diagram of the embodiment of the distance detection device provided by the utility model is shown in the figure.

[0022] Figure 2 The exploded structural schematic diagram of the distance detection device provided by the utility model is shown in the figure. Figure 1 The partial structural schematic diagram in the distance detection device provided by the utility model is shown in the figure.

[0023] Figure 3 The cross-sectional structural schematic diagram of the circular table plug gauge provided by the utility model is shown in the figure. Figure 1

[0024] Figure 4 The cross-sectional structural schematic diagram of the circular table plug gauge provided by the utility model is shown in the figure.

[0025] EXPLANATION OF FIGURES​

[0026] 100, distance detection device;

[0027] 1, main ruler;

[0028] 2, detector; 21, main body; 22, display module; 23, fastening screw;

[0029] 3, measurement assembly; 31, round table plug gauge; 311, measurement part; 3111, first end face; 3112, second end face; 312, mounting part; 32, side arm; 33, mounting seat; 331, sliding through hole; 34, locking screw;

[0030] 4, measurement base; 41, measurement base surface;

[0031] Z, extension direction.

[0032] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0034] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0035] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, if "and / or" or "and / or" appears in the whole text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0036] As an important link of vehicle quality control, the vehicle part detection stage usually needs to detect whether the hole diameter in the vehicle part and the width of the gap between the parts meet the design requirements. These parameters directly affect the assembly quality, running performance and even safety of the vehicle. Usually, the detection personnel mainly rely on plug gauges or plug gauges to detect the hole diameter and the gap between the parts. Plug gauges and plug gauges are simple and easy to operate, so they are widely used in vehicle manufacturing industry.

[0037] And according to the observation and research of the inventor, it is found that in the actual operation process, when using plug gauges for detection, due to the complexity and diversity of vehicle structure, for example, in narrow or difficult to directly observe space, the detection personnel can only adopt the way of looking down or looking aside to read the scale line on the surface of the plug gauge. This non-front observation angle not only increases the reading difficulty, but also is easy to cause reading error due to visual deviation. In addition, the detection personnel needs to temporarily remember these values in the brain, and then records them through paper and pen, so that the human factors in this process undoubtedly increase the risk of data error. On the other hand, as another commonly used detection tool, plug gauges can detect whether the gap width or hole diameter falls within a certain predetermined interval, but its limitations are also obvious. The design principle of plug gauges determines that it cannot provide measurement results accurate to specific values, but can only give rough interval estimation. This extensive detection method is obviously difficult to meet the needs in modern vehicle manufacturing industry which pursues high precision and high quality standards. Therefore, the traditional detection method has low accuracy, and the process of manual reading and data input is easy to make mistakes, so that the detection data is unreliable, affecting the effectiveness of the detection data.

[0038] In view of this, the utility model provides a distance detection device to solve the above technical problems.

[0039] Please refer to Figures 1 to 3In an embodiment of the utility model, this distance detection device 100 includes main ruler 1, detector 2 and measurement component 3. Among them, detector 2 includes main body 21 and display module 22, main body 21 is slidably installed in main ruler 1, and display module 22 is used to show the displacement of main body 21 relative to main ruler 1;Measurement component 3 is installed in main body 21 and moves synchronously with main body 21, and measurement component 3 includes circular platform plug gauge 31, and circular platform plug gauge 31 includes measuring part 311, and measuring part 311 is positive circular platform structure, and measuring part 311 includes oppositely arranged first end face 3111 and second end face 3112, and the axis of measuring part 311 is parallel to the extension direction Z of main ruler 1, and the diameter of first end face 3111 is less than the diameter of second end face 3112, and first end face 3111 is set away from main body 21.

[0040] Specifically, the main body 21 has a measuring function, the extension direction Z of the main ruler 1 is the length direction of the main ruler 1, the main body 21 can reciprocate along the extension direction Z, the main body 21 can measure the displacement relative to the main ruler 1 while sliding on the main ruler 1, and display the displacement value on the display module 22, the display module 22 includes one of a digital display screen and a liquid crystal display screen, and is used to display the displacement amount of the main body 21. The measuring assembly 3 can move synchronously with the main body 21, that is, the measuring assembly 3 can displace relative to the main ruler 1 at the same time as the main body 21, and then the displacement amount of the circular truncated cone plug gauge 31 relative to the main ruler 1 is the same as the displacement amount of the main body 21 when the main body 21 slides on the main ruler 1, so the value displayed by the display module 22 also represents the displacement amount of the circular truncated cone plug gauge 31. The measuring part 311 is in the shape of an elongated right circular truncated cone as a whole, and the right circular truncated cone is a part of a circular cone. Specifically, it is the part left after the upper part of the circular cone is cut off by a plane parallel to the bottom surface of the circular cone. The original bottom surface of the circular cone becomes the lower base of the right circular truncated cone, the cross section becomes the upper base of the right circular truncated cone, and the side surface left after the cutting becomes the side surface of the right circular truncated cone. The right circular truncated cone has axial symmetry, that is, the shape and size thereof do not change after rotating by any angle around the axis thereof. The diameter of the first end surface 3111 is smaller than that of the second end surface 3112. When measuring the diameter of a hole or the width of a gap, the first end surface 3111 faces the hole to be measured or the gap to be measured, and gradually extends into the hole or the gap with the sliding of the main body 21. With the continuous extension of the circular truncated cone plug gauge 31, the diameter of the measuring part 311 at the hole opening or the gap opening becomes larger and larger, until the measuring part 311 cannot continue to extend into the inside of the hole to be measured or the gap to be measured. At this time, the value displayed by the display module 22 is the depth of the final extension of the measuring part 311 into the hole to be measured or the gap to be measured. By detecting the depth of the extension of the measuring part 311 into the hole to be measured or the gap to be measured, in combination with the diameters of the first end surface 3111 and the second end surface 3112 and the height of the measuring part 311, the diameter of the hole to be measured or the width of the gap to be measured can be calculated. For example, the depth of the extension into the hole to be measured or the gap to be measured is 5 mm, the diameter of the first end surface 3111 is 4 mm, the diameter of the second end surface 3112 is 6 mm, and the height of the measuring part 311 is 20 mm. Then the diameter of the hole to be measured or the width of the gap to be measured is 4.5 mm.

[0041] The technical scheme of the embodiment makes the customized truncated cone plug gauge 31 move synchronously with the main body 21, so that the display module 22 can intuitively display the depth to which the truncated cone plug gauge 31 can extend into the measured hole or the measured gap, and then the diameter of the measured hole or the width of the measured gap can be converted according to the numerical value of the extension depth, the diameters of the first end face 3111 and the second end face 3112, and the distance between the first end face 3111 and the second end face 3112. By adopting the scheme provided in the embodiment, the detection personnel do not need to look down or look aside to read the readings during detection, but only need to directly read the depth value displayed in the display module 22, so as to reduce the phenomenon of misreading and misreading of the detection personnel, avoid reading errors, and further improve the reliability of the detection data.

[0042] Further, in an embodiment of the utility model, the detector 2 further includes a wireless module, the wireless module is installed on the main body 21, and the wireless module is used to send the displacement of the main body 21 relative to the main ruler 1 to an external information processing device. The wireless module includes one of a Bluetooth transmission module and a WIFI transmission module. By setting the wireless module, the depth to which the truncated cone plug gauge 31 extends into the measured hole or the measured gap can be transmitted to the external information processing device, and a preset calculation program in the information processing device can convert the depth value into the hole diameter of the measured hole or the width of the measured gap. Please refer to Figure 4 , the hole diameter or the gap width is D, the detected depth value is N, and the calculation function for converting the depth value N into the hole diameter or the gap width D is D=D1+2×(N×(D2-D1) / 2 / L). The function is converted into a calculation program and input into the information processing device, so that the hole diameter or the gap width D can be quickly calculated according to the depth value N. In addition, by setting the wireless module, the detection personnel do not need to read and record the depth value from the display module 22, which reduces the detection link and improves the detection efficiency.

[0043] In an embodiment of the utility model, please refer to Figure 4, the diameter of the first end surface 3111 is D1, the diameter of the second end surface 3112 is D2, and the distance between the first end surface 3111 and the second end surface 3112 is L; D1, D2 and L satisfy: 1 For example, a batch of circular holes with a design hole diameter of 3mm need to be detected, and the allowable error is ±1mm. At this time, the circular cone plug gauge 31 needs to meet the actual requirements, the diameter D1 of the first end surface 3111 is 2mm, and the diameter D2 of the second end surface 3112 is 4mm. At this time, the ratio of D2 to D1 is 2, and the maximum distance between the first end surface 3111 and the second end surface 3112 is 40mm. If the diameter distribution range of the circular hole to be detected is 3mm to 7mm, the diameter D1 of the first end surface 3111 is designed to be 2mm, and the diameter D2 of the second end surface 3112 is designed to be 8mm. The ratio of D2 to D1 is 4, and the maximum distance between the first end surface 3111 and the second end surface 3112 is 120mm. It should be noted that in order to ensure the ease of operation and accuracy during measurement, the distance between the first end surface 3111 and the second end surface 3112 should not be too long. When the ratio of D2 to D1 exceeds 4, in order to ensure that the circular cone plug gauge 31 looks more coordinated, it may be necessary to lengthen the distance between the first end surface 3111 and the second end surface 3112. If the circular cone plug gauge 31 is too long, it will easily lead to the situation that when the first end surface 3111 extends to the bottom of the hole, the side surface of the circular cone plug gauge 31 has not yet contacted the opening of the measured hole, resulting in the need to replace other models of the circular cone plug gauge 31 for detection again, wasting detection time. In the embodiment, the distance between the first end surface 3111 and the second end surface 3112 should be less than 120mm, and preferably less than 80mm.

[0044] In an embodiment of the present application, the measuring assembly 3 comprises a side arm 32 and a mounting seat 33. One end of the side arm 32 is mounted on the main body 21, and the mounting seat 33 is slidingly mounted on the side arm 32. The circular cone plug gauge 31 is mounted on the mounting seat 33 and moves synchronously with the mounting seat 33. Please refer to Figure 2 and Figure 3The side arm 32 is threadedly connected with the main body 21 or integrally formed, the mounting seat 33 is internally formed with a sliding through hole 331, the sliding through hole 331 is in the same shape as the outer contour shape of the side arm 32, so that the mounting seat 33 can be sleeved on the side arm 32 and can slide along the side arm 32. The circular cone plug gauge 31 is installed on the mounting seat 33, so that the circular cone plug gauge 31 can be driven by the mounting seat 33 to approach or move away from the main ruler 1, thereby adapting to various different detection scenes.

[0045] Further, in order to facilitate the replacement of different models of the circular cone plug gauge 31, the circular cone plug gauge 31 and the mounting seat 33 are detachably connected, and the connection forms of the two are various. Among them, please refer to Figure 3 In an embodiment of the utility model, the circular cone plug gauge 31 further includes an installation part 312, the installation part 312 is connected with the second end face 3112, the installation part 312 is provided with external threads, the mounting seat 33 is provided with a threaded hole, the inside of the threaded hole is provided with internal threads, and the external threads and the internal threads are matched to be arranged to enable the circular cone plug gauge 31 to be installed on the mounting seat 33. By rotating the circular cone plug gauge 31, the circular cone plug gauge 31 can be installed on the mounting seat 33 or detached from the mounting seat 33, and the threaded connection mode is not only simple and fast, but also can provide stable connection effect, and ensure that the circular cone plug gauge 31 will not accidentally fall off during use.

[0046] In another embodiment, the circular cone plug gauge 31 further includes an installation part 312, the installation part 312 is connected with the second end face 3112, the installation part 312 is provided with an arc-shaped clamping groove, the mounting seat 33 is provided with a mounting hole, the side wall of the mounting hole is provided with an arc-shaped protrusion, and the arc-shaped clamping groove and the arc-shaped protrusion are matched to be arranged to enable the circular cone plug gauge 31 to be installed on the mounting seat 33. The cooperation of the arc-shaped clamping groove and the arc-shaped protrusion makes the replacement of the circular cone plug gauge 31 more simple and fast. The detection personnel only need to align the installation part 312 of the circular cone plug gauge 31 with the mounting hole of the mounting seat 33 and push the circular cone plug gauge 31 relative to the mounting seat 33 to complete the installation. Among them, the arc-shaped clamping groove and the arc-shaped protrusion are interference fit to improve the stability of the circular cone plug gauge 31 during use.

[0047] In an embodiment of the utility model, the measuring assembly 3 further includes a locking screw 34, the mounting seat 33 is provided with a locking through hole, the locking screw 34 is installed in the locking through hole, and the locking screw 34 is rotated to press the side arm 32 close to or away from the end of the side arm 32. Please refer to Figure 2 and Figure 3The top of the locking screw 34 is provided with a cylindrical structure for facilitating manual operation, and vertical lines are arranged on the top to increase the friction between the surface and the hand. By tightening the locking screw 34, the bottom surface of the locking screw 34 is pressed against the side arm 32, so that the mounting seat 33 is fixed to the side arm 32, and sliding of the mounting seat 33 during lifting of the plunger gauge is avoided. When it is necessary to adjust the position of the mounting seat 33, the locking screw 34 is loosened, so that the bottom surface of the locking screw 34 moves away from the surface of the side arm 32, and at this time, the mounting seat 33 can slide on the side arm 32.

[0048] In an embodiment of the present application, please refer to Figure 2 The distance detection device 100 further comprises a measurement base 4, the measurement base 4 is installed at one end of the main ruler 1, and a measurement base surface 41 is arranged on the side of the measurement base 4 away from the main ruler 1, and the measurement base surface 41 is perpendicular to the extension direction Z of the main ruler 1. The existence of the measurement base 4 provides additional support for the distance detection device 100, so that the distance detection device 100 is more stable during the measurement process and is not easily disturbed by external factors. The area of the measurement base surface 41 is greater than the area of the bottom surface of the main ruler 1, and this design enables the measurement base surface 41 to be stably placed on the surface of the part near the measured hole or the measured gap, thereby reducing the error caused by the instability of the main ruler 1 itself, and improving the measurement accuracy.

[0049] In addition, in an embodiment of the present application, the distance detection device 100 further comprises an end limiting piece, the end limiting piece is installed at the end of the main ruler 1 away from the measurement base 4, and the end limiting piece is used to limit the sliding range of the main body 21 in cooperation with the measurement base 4. The existence of the end limiting piece can effectively prevent the main body 21 from excessive sliding during the measurement process, thereby avoiding damage or measurement error caused by sliding beyond the predetermined range.

[0050] In an embodiment of the present application, the detector 2 further comprises a fastening screw 23, the main body 21 is provided with a fastening through hole, and the fastening screw 23 is installed in the fastening through hole. By rotating the fastening screw 23, the end of the fastening screw 23 is pressed against the main ruler 1 or away from the main ruler 1. Please refer to Figure 1 and Figure 2The fastening screw 23 is used to relatively fix the main body 21 and the main ruler 1, the pressing degree of the fastening screw 23 is adjusted, the required force size when the main body 21 slides relative to the main ruler 1 can be changed, if the friction between the main body 21 and the main ruler 1 is too small in the detection process, the main body 21 can slide downwards quickly under the action of gravity, the circular truncated cone plug gauge 31 can be embedded into the measured hole or the measured gap due to the action of gravity, and the hole wall of the measured hole or the side wall of the measured gap can be deformed. When it is necessary to record the detected depth value, if the detection personnel is inconvenient to directly observe the display module 22 due to the limitation of the position, the fastening screw 23 can be tightened, the main body 21 is fixed to the main ruler 1, and the distance detection device 100 is taken out to observe, so that the measurement result is not affected by the wrong operation or disturbance.

[0051] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application and the content of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A distance detection device, characterized by, The distance detection device comprises a main ruler, a detector and a measuring assembly. The detector comprises a main body and a display module, the main body is slidingly installed on the main ruler, and the display module is used for displaying the displacement of the main body relative to the main ruler. The measuring assembly is installed on the main body and moves synchronously with the main body, and comprises a circular truncated cone plug gauge. The circular truncated cone plug gauge comprises a measuring part in a circular truncated cone structure, the measuring part comprises oppositely arranged first and second end faces, the axis of the measuring part is parallel to the extension direction of the main ruler, the diameter of the first end face is smaller than that of the second end face, and the first end face is arranged away from the main body.

2. The distance detection apparatus according to claim 1, wherein The detector further comprises a wireless module installed on the main body, which is used for transmitting the displacement of the main body relative to the main ruler to an external information processing device.

3. The distance detection device of claim 1, wherein the diameter of the first end face is defined as D1, the diameter of the second end face is defined as D2, and the distance between the first and second end faces is defined as L. The D1, D2 and L satisfy 1 4. The distance detection apparatus according to claim 1, wherein The measuring assembly comprises a side arm and a mounting seat, one end of the side arm is installed on the main body, the mounting seat is slidingly installed on the side arm, and the circular truncated cone plug gauge is installed on the mounting seat and moves synchronously with the mounting seat.

5. The distance detection apparatus according to claim 4, wherein The circular truncated cone plug gauge further comprises a mounting part connected with the second end face, the mounting part is provided with external threads, the mounting seat is provided with a threaded hole with internal threads, and the external threads and the internal threads are arranged in a matched mode to enable the circular truncated cone plug gauge to be installed on the mounting seat.

6. The distance detection apparatus according to claim 4, wherein The circular truncated cone plug gauge further comprises a mounting part connected with the second end face, the mounting part is provided with an arc-shaped clamping groove, the mounting seat is provided with a mounting hole with an arc-shaped protrusion on the side wall, and the arc-shaped clamping groove and the arc-shaped protrusion are arranged in a matched mode to enable the circular truncated cone plug gauge to be installed on the mounting seat.

7. The distance detection apparatus according to claim 4, wherein The measuring assembly further comprises a locking screw, the mounting seat is provided with a locking through hole, the locking screw is installed in the locking through hole, and the locking screw is rotated to press the side arm against the end portion of the side arm or away from the side arm.

8. The distance detection apparatus according to claim 1, wherein The distance detection device further comprises a measuring base, the measuring base is installed on one end of the main ruler, and a measuring base surface is arranged on the side of the measuring base away from the main ruler, and the measuring base surface is perpendicular to the extension direction of the main ruler.

9. The distance detection apparatus according to claim 8, wherein The distance detection device further comprises an end limiting piece, the end limiting piece is installed on the end of the main ruler away from the measuring base, and the end limiting piece is used for limiting the sliding range of the main body in cooperation with the measuring base.

10. The distance detection apparatus according to claim 1, wherein The detector further comprises a fastening screw, the main body is provided with a fastening through hole, the fastening screw is installed in the fastening through hole, and the fastening screw is rotated to press the main body against the end portion of the main body or away from the main body.

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