A device for detecting the axis of a door hinge and the clearance of the door movement space envelope

Abstract

The application relates to the technical field of vehicle door hinge detection, and discloses a device for detecting the axis of a vehicle door hinge and the clearance between the motion space envelope of a vehicle door and the device for detecting the axis of a vehicle door hinge, which comprises a main body and a detection block, the detection block is slidably arranged on the main body, and the detection block comprises a detection angle; the detection angle and the hinge are in linear and planar contact, so as to solve the problem of inaccurate detection results in the coaxiality detection of the existing vehicle door hinge.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle door hinge detection, and particularly relates to a device for detecting the axis of a vehicle door hinge and the clearance of a vehicle door movement space envelope. BACKGROUND

[0002] A hinge is a mechanical device used to connect two solids and allow relative rotation between the two, a vehicle door hinge connects a vehicle door and a vehicle body while maintaining the position of the vehicle door relative to the vehicle body, enabling the opening and closing of the vehicle door. The vehicle door hinge includes three parts: a vehicle body part connected to the vehicle body, a vehicle door part connected to the vehicle door, and other parts connecting the vehicle body part and the vehicle door part to ensure that the vehicle door hinge can be opened and closed. The vehicle body and the vehicle door are usually connected by two upper and lower hinges to ensure the stability of the vehicle door during opening and closing. The coaxial assembly between the upper and lower hinges is very important. If the upper and lower hinges are not coaxial, the vehicle door may jam when opening and closing, or even cannot be completely closed after installation, causing the vehicle door to shake or open unexpectedly during driving, resulting in safety accidents.

[0003] Currently, the operation of detecting the coaxiality of the upper and lower hinges of the vehicle door in automobile production is relatively complex, and the detection results are not accurate when measured by various detection tools, resulting in increased workload of rework and repair during vehicle door installation, thereby increasing production costs and production cycle. SUMMARY

[0004] The present application aims to provide a device for detecting the axis of a vehicle door hinge and the clearance of a vehicle door movement space envelope to solve the problem of inaccurate detection results in the existing detection of the coaxiality of a vehicle door hinge.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a device for detecting the axis of a vehicle door hinge and the clearance of a vehicle door movement space envelope, comprising a main body and a detection block, the detection block being slidably arranged on the main body, the detection block comprising a detection angle, the detection angle being in line-to-surface contact with the hinge.

[0006] The beneficial effects of the present application are: by setting the detection angle, the detection angle bottom end and the surface of the hinge shaft form a straight line contact during detection, ensuring intuitive and accurate judgment of the relationship between the coaxiality of the two hinge shafts of the vehicle door, reducing detection errors and ensuring the accuracy of the detection results.

[0007] 1. The prior art uses the contact between arc surfaces to detect the axis, but when the arc surface wraps the hinge shaft, it is not possible to determine whether the detection device is in sufficient contact with the surface of the hinge shaft. However, the detection angle of the present scheme is a line-to-surface contact, and the coaxiality of the door axis is not absolutely coaxial. A 0.3mm error is a qualified product, and the line-to-surface contact can be further confirmed by using a distance measuring instrument during detection, thereby reducing the door rework situation.

[0008] 2. The detection block slides on the main body, thereby ensuring that the detection device can randomly and accurately adjust the distance between the detection blocks according to the actual distance between the hinges, thereby facilitating the use of the detection device.

[0009] Preferably, the main body is provided with an arrow-shaped protrusion, the detection block is provided with an arrow-shaped groove, the arrow-shaped protrusion is slidingly connected in the arrow-shaped groove, and the detection block is provided with a fixing screw, one end of the fixing screw abutting against the surface of the arrow-shaped protrusion.

[0010] The beneficial effects of the present scheme are that the cooperation between the arrow-shaped protrusion and the arrow-shaped groove ensures the stability of the sliding connection of the detection block on the main body, and further ensures that the detection block can remain relatively fixed with the main body during the axis detection process after the detection block is fixed by the fixing screw, avoiding the situation that the connection is loose and affecting the accuracy of the detection result.

[0011] Preferably, the main body is connected with a handle, the main body is internally provided with a cavity, and the cavity is provided with a reinforcing plate.

[0012] The beneficial effects of the present scheme are that the handle can facilitate the relevant operation during the detection process; the main body is internally provided with a cavity to reduce the weight of the entire detection device, thereby further improving the convenience of the detection device during use; and the main body is internally provided with a cavity and fixed with a reinforcing plate, which ensures the stability of the structure of the main body itself, avoids damage, deformation and bending of the main body during use or storage of the detection device, and affects the accuracy of the detection result.

[0013] Preferably, the detection angle is an acute angle.

[0014] The beneficial effects of the present scheme are that the acute angle makes the bottom end of the detection angle more sharp, so as to better observe the fitting degree between the detection angle and the surface of the hinge shaft during the detection process.

[0015] Preferably, the detection block is further provided with a stepped detection piece, the stepped detection piece includes a positioning surface and a first detection part, the first detection part is provided with a first arc surface, and the first arc surface is perpendicular to the positioning surface.

[0016] The beneficial effects of the present scheme are that: since the gap size between the door and the fender directly affects the normal opening or closing function of the door, if the gap between the door and the fender is too small, the door will contact and knock the fender when the door is opened, causing problems such as rusting of the paint off the sheet metal, etc., and the step detection piece is arranged to detect the movement space envelope gap of the door;

[0017] The first arc surface is in line with the side of the fender close to the door, and when detecting, the door is rotated relative to the hinge shaft to simulate the opening use of the door under the whole vehicle state, and whether the door will contact the first arc surface during rotation is observed, and if there is contact, it means that the door will knock and scratch the paint on the real fender, which needs to be adjusted.

[0018] Preferably, the step detection piece further comprises a second detection part, and the second detection part is located above the first detection part, and the second detection part is provided with a second arc surface.

[0019] The beneficial effects of the present scheme are that: the second arc surface is in line with the top end of the side of the fender close to the door, and during the detection of the movement space envelope gap of the door by the detection block, whether the door outer plate and the surface of the fender are parallel can be judged by observing whether the second arc surface and the surface of the door outer plate are parallel.

[0020] Preferably, the step detection piece is provided with an angle measuring device, and the angle measuring device comprises a scale disc and a rotating rod, and the scale disc comprises a scale block provided with a first scale line and a second scale line provided on the second detection part.

[0021] The beneficial effects of the present scheme are that: when detecting the surface of the door outer plate and the fender, the rotating rod is rotated above the door outer plate and then downward, so that the rotating rod is attached to the surface of the door outer plate, and then the specific position of the rotating rod on the scale disc is observed to accurately determine whether the surface of the door outer plate and the fender are parallel;

[0022] And the error of ±0.5mm between the door outer plate and the fender is within the qualified standard range, so the first scale line and the second scale line on the scale disc can more comprehensively determine whether the door detection is qualified.

[0023] Preferably, the scale disc is a sector, the center of the scale disc is provided with a connecting shaft, the rotating rod is rotatably connected to the connecting shaft, and the rotating rod is eccentrically arranged relative to the connecting shaft.

[0024] The beneficial effects of the present scheme are that: the eccentric arrangement ensures that when the rotating rod is rotated to be parallel to the second arc surface, the right end surface of the rotating rod just exposes the 0° scale line on the scale disc, which is convenient for reading.

[0025] Preferably, a positioning block is vertically arranged on the positioning surface.

[0026] The beneficial effects of the scheme are: when detecting, the detection block is placed on the corresponding hinge first, then the device is moved to make the positioning block abut against the hinge, and the included angle between the positioning surface and the positioning block is a right angle, so that the position of the straight line at the bottom end of the detection angle in the detection block is fixed, and the positional relationship between the door and the hinge axis is determined at the same time under the premise that the upper and lower hinges are coaxial, and the positional relationship between the door and the hinge axis is determined, when detecting the movement space envelope gap of the door, when detecting the gap between the door and the fender through the stepped detection piece, if the stepped detection piece on one detection block collides with the door during the rotation of the door, and the other detection block does not collide with the door, it means that errors occur in the installation of the door and the hinge, which avoids the problem that the door is detected to have problems only after being installed on the vehicle body, thereby avoiding the problem of multiple rework and increased production cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a three-dimensional view of the detection device in embodiment 1 of the application;

[0028] Figure 2 It is a three-dimensional view of the detection device in embodiment 1 of the application from another perspective;

[0029] Figure 3 It is a three-dimensional view of the detection device in embodiment 1 of the application in a detection state;

[0030] Figure 4 It is a three-dimensional view of the detection angle in a detection state in embodiment 1 of the application;

[0031] Figure 5 It is a partial three-dimensional view of the door outer panel in embodiment 1 of the application;

[0032] Figure 6 It is a partial three-dimensional view of the fender in embodiment 1 of the application;

[0033] Figure 7 It is Figure 6 a partial enlarged view of A in the middle;

[0034] Figure 8 It is a three-dimensional view of the angle measuring device in embodiment 2 of the application. DETAILED DESCRIPTION

[0035] The following will be further described in detail through specific embodiments:

[0036] The reference numerals in the accompanying drawings include: main body 1, arrow-shaped protrusion 11, cavity 12, reinforcing plate 121, handle 13, positioning block 14, detection block 2, fixing screw 21, detection angle 22, stepped detection component 23, positioning surface 231, first detection part 232, first arc-shaped surface 233, second detection part 234, second arc-shaped surface 235, hinge 3, hinge shaft 31, outer door panel 4, fender 5, dial 6, rotating rod 61, connecting shaft 611, scale block 62, first scale line 63, and second scale line 64.

[0037] Example 1

[0038] Example 1 is basically as shown in the appendix. Figures 1-7 As shown, Figure 1 The device shown is for detecting the hinge axis and the clearance of the door's movement space. It includes a main body 1 and detection blocks 2. The main body 1 is a cuboid. In this embodiment, the door is a front door, and two hinges 3 (upper and lower) connect the door to the vehicle body; therefore, two detection blocks 2 are also provided. Both detection blocks 2 are slidably connected to the main body 1. The specific method of sliding connection of the detection blocks 2 is as follows... Figure 2 As shown: An arrow-shaped protrusion 11 is provided directly below the main body 1, and the arrow-shaped protrusion 11 is integrally formed with the main body 1. An arrow-shaped groove is provided on the detection block 2, and both ends of the arrow-shaped groove extend beyond the detection block 2 to form a through groove. The outer contour of the arrow-shaped protrusion 11 fits against the inner wall of the arrow-shaped groove, thereby realizing the sliding connection of the detection block 2 to the main body 1. At the same time, each detection block 2 has a threaded through hole, which is perpendicular to the arrow-shaped protrusion 11. A fixing screw 21 is threaded into the threaded through hole. After the detection block 2 is connected to the main body 1 through the arrow-shaped protrusion 11, the fixing screw 21 is turned to make the fixing screw 21 press against the surface of the arrow-shaped protrusion 11, thereby fixing the detection block 2 to the main body 1, so as to accurately detect the coaxiality of the hinge axis. The two detection blocks 2 slide on the main body 1 and the distance between them is adjusted by the fixing screw 21 to ensure that the detection device can be randomly and accurately adjusted according to the actual distance between the upper and lower hinges 3, thereby facilitating the use of the detection device. The fit between the arrow-shaped protrusion 11 and the arrow-shaped groove ensures the stability of the sliding connection of the detection block 2 on the main body 1. This further ensures that after the detection block 2 is fixed with the fixing screw 21, the detection block 2 can remain relatively fixed with the main body 1 during the axis detection process, avoiding the impact on the accuracy of the detection results due to loose connection.

[0039] like Figure 2 As shown, the detection block 2 protrudes downward to form a detection angle 22, the bottom of the detection angle 22 is a straight line, and the bottoms of the detection angles 22 in the two detection blocks 2 on the main body 1 are located on the same straight line; as Figure 3As shown, the hinge 3 is fixed with a hinge shaft 31 through threaded connection, when detecting the coaxiality of the two hinge shafts 31 between the upper and lower hinges 3 of the vehicle door, the bottom end of the detection angle 22 is attached to the surface of the hinge shaft 31 in one of the hinges 3, and then the other detection angle 22 is observed to be attached to the surface of the other hinge shaft 31 or not, if attached, it means that the two hinge shafts 31 are coaxial; since the surface of the hinge shaft 31 is a curved surface, the bottom end of the detection angle 22 is attached to the surface of the hinge shaft 31, which is the contact between the line and the surface, and the coaxiality detection of the axis is to detect whether the two hinge shafts 31 are located on the same straight line, therefore, the detection angle 22 is arranged below the detection block 2, so that the contact point between the bottom end of the detection angle 22 and the surface of the hinge shaft 31 forms a straight line, thereby ensuring that the coaxiality of the two hinge shafts of the vehicle door can be more intuitively and accurately judged to meet the factory standard, and the detection error is reduced; and in the embodiment, the angle of the bottom end of the detection angle 22 is an acute angle, which makes the bottom end of the detection angle 22 more sharp, so that the attachment between the detection angle 22 and the surface of the hinge shaft 31 can be better observed during the detection process.

[0040] In addition, the top of the main body 1 is also fixed with a handle 13 through a welding manner, the handle 13 is located at the middle position of the main body 1, and the handle 13 can facilitate the related operation in the detection process; and as shown in Figure 1 As shown, the main body 1 and the inside of the arrow-shaped protrusion 11 are both provided with a cavity 12, and the inside is arranged as the cavity 12, which can reduce the weight of the entire detection device, thereby further improving the convenience of the detection device in use; the cavity 12 in the inside of the main body 1 is fixed with a reinforcing plate 121, which ensures the stability of the structure of the main body 1, avoids damage, deformation and bending of the main body 1 during use or storage of the detection device, and affects the accuracy of the detection result.

[0041] Since the vehicle door in the embodiment is the front door of the vehicle, when one end of the hinge 3 is fixed on the vehicle door, the other end of the hinge 3 is close to the fender 5 of the vehicle, and in combination with Figure 6 、 Figure 7 As shown, there is a gap between the vehicle door and the fender 5, and the size of the gap between the vehicle door and the fender 5 directly affects the normal opening or closing function of the vehicle door, if the gap between the vehicle door and the fender 5 is too small, when the vehicle door is opened to a certain angle, the edge of the outer plate 4 of the vehicle door will contact and collide with the edge of the fender 5 close to the vehicle door, causing problems such as damage, paint peeling and rusting of the sheet metal; therefore, the detection block 2 is also provided with a stepped detection piece 23 to detect the movement space envelope gap of the vehicle door.

[0042] As shown in Figure 2As shown, the stepped detection piece 23 is stepped as a whole, comprising a positioning surface 231, a first detection part 232 and a second detection part 234. The positioning surface 231 is the bottom surface of the detection block 2 and is also the bottom surface of the first detection part 232. In combination Figure 4 As shown, when the detection operation is performed, the detection block 2 is placed on the top of the upper and lower hinges 3, and the positioning surface 231 is fitted with the top surface of the hinge 3, so as to fix and position the detection position of the detection device. Not only can the observation of the contact between the detection angle 22 and the surface of the hinge shaft 31 and the confirmation of the coaxiality of the shaft line be facilitated during the detection process, but also the problem of the misalignment of the two hinge shafts 31 due to the manual operation error when the detection device is held can be further avoided, so as to further improve the accuracy of the detection result.

[0043] The second detection part 234 is the upper step of the first detection part 232. The top surface of the first detection part 232 is a first arc surface 233, and the top surface of the second detection part 234 is a second arc surface 235. The second arc surface 235 is perpendicular to the first arc surface 233, as shown in Figure 6 As shown, the first detection part 232 and the second detection part 234 of the two detection blocks 2 on the main body 1 are designed differently according to the end surface shape of the fender 5 close to the door side, so as to ensure that the first detection part 232 and the second detection part 234 on the two detection blocks 2 can simulate the gap and positional relationship between the fender 5 and the door in the whole vehicle forming state, so as to realize the detection of the envelope gap of the door movement space after the detection of the door hinge axis by the detection block 2. The above detection block 2 is taken as an example for description, as shown in Figure 7 As shown, the side surface of the fender 5 close to the door end is wavy, so as to meet the movement space required by the opening of the door and reduce the gap between the fender 5 and the door, so as to avoid the exposure of the related parts and affect the appearance. The first arc surface 233 and the second arc surface 235 are respectively fitted with the side surface of the fender 5 close to the door. When the detection is performed, as shown in Figure 5 As shown, the detection device is first placed on the hinge 3 through the positioning surface 231, and then the door is operated to rotate relative to the hinge shaft 31, so as to simulate the opening use of the door in the whole vehicle state. Whether the door will contact the first arc surface 233 during the rotation of the door is observed. If there is contact, it means that the door will collide with the real fender 5 and cause paint damage, which needs to be adjusted.

[0044] As shown in Figure 2As shown, the lower end of the lower detection block 2 is fixed with a positioning block 14 by welding, and the positioning block 14 is perpendicular to the positioning surface 231 after being fixed, and the two cooperate to fix the lower detection block 2 and the hinge 3. In actual production of the vehicle door, there may be a situation that the vehicle door itself is misaligned due to installation errors of the inner panel and the outer panel 4 of the vehicle door. If installation errors occur again when installing the upper and lower hinges 3, the errors will offset the misaligned vehicle door, resulting in the situation that the upper and lower hinge shafts 31 are coaxial, but the installation of the vehicle door and the hinge 3 is unqualified. After fixing the positioning block 14 on one of the detection blocks 2, the detection block 2 is placed on the corresponding hinge 3 during detection, and then the positioning block 14 is moved to abut against the hinge 3. If Figure 3 As shown, the positioning surface 231 and the positioning block 14 form a right angle, so that the position of the straight line at the bottom end of the detection angle 22 of the detection block 2 is fixed. Under the premise that the upper and lower hinges 3 are coaxial, the positional relationship between the vehicle door and the hinge shaft 31 is determined. When detecting the envelope clearance of the vehicle door movement space in the next step, if the stepped detection piece 23 on one of the detection blocks 2 collides with the vehicle door during the rotation of the vehicle door, and the other detection block 2 does not collide with the vehicle door, it means that errors have occurred in the installation of the vehicle door and the hinge 3. This avoids the problem that the vehicle door is detected to have problems only after being installed on the vehicle body, resulting in multiple rework and increased production costs.

[0045] At the same time, since the vehicle door is assembled from the inner panel and the outer panel 4 during the production process of the vehicle, errors may occur during the assembly process, resulting in unqualified connection of the inner panel and the outer panel 4 of the vehicle door, and the surface of the outer panel 4 and the fender 5 is not parallel, resulting in the situation that the vehicle leaks water and air after being delivered. Since the second arc surface 235 is in line with the top end of the side surface of the fender 5 close to the vehicle door, during the detection of the envelope clearance of the vehicle door movement space by the detection block 2, whether the surface of the second arc surface 235 and the outer panel 4 is parallel can be determined by observing whether the surface of the second arc surface 235 and the outer panel 4 is parallel.

[0046] The implementation process is as follows: first, adjust the positions of the two detection blocks 2 on the main body 1 by the fixing screws 21, and ensure that the two detection blocks 2 can enter between the upper and lower hinges 3 respectively. Then hold the handle 13, place the positioning surface 231 of the detection block 2 on the top surface of the two hinges 3, and ensure that the positioning block 14 in the lower detection block 2 also abuts against the hinge 3, so as to complete the positioning of the detection device; observe the contact state of the two detection angles 22 with the surfaces of the two hinge shafts 31, if the two detection angles 22 respectively abut against the surfaces of the two hinge shafts 31, it means that the door hinge shafts are coaxial, and the product is qualified; if one of the detection angles 22 abuts against the hinge shaft 31, and the other detection angle 22 cannot contact the surface of the other hinge shaft 31, it means that the product is unqualified and needs to be reworked and adjusted. Since the detection angle 22 and the surface of the hinge shaft 31 are line-surface contact, and the coaxiality of the door shaft is not absolutely coaxial, and the coaxiality error of 0.3mm is a qualified product, at this time the line-surface contact can be used to make further confirmation by using the distance measuring instrument during detection, so as to reduce the door rework.

[0047] After the hinge shaft line detection is qualified, again ensure that the positioning surfaces 231 in the detection device respectively abut against the top surfaces of the upper and lower hinges 3, the positioning block 14 abuts against the lower hinge 3, and the two detection angles 22 are in contact with the surfaces of the two hinge shafts 31, then rotate the door, observe whether the door will collide with the stepped detection piece 23 during rotation, and observe whether the second arc surface 235 is parallel to the door outer plate 4, complete the detection of the envelope gap of the door movement space and whether the surface of the door outer plate 4 is parallel to the fender 5.

[0048] Example 2

[0049] As Figure 8The detection device for the axis of the door hinge and the clearance of the envelope of the door movement space is different from the embodiment 1, and the second detection part 234 is further provided with an angle measuring device; the angle measuring device comprises a rotating rod 61 and a scale disc 6, the scale disc 6 is a sector, comprising a scale block 62 provided with a first scale line 63 and a second scale line 64 arranged on the second detection part 234, the connection position of the first scale line 63 and the second scale line 64 is the 0° indicating line of the scale disc 6, a connecting shaft 611 is welded and fixed at the center of the scale disc 6, and the connecting shaft 611 is arranged on the surface of the second arc surface 235, the rotating rod 61 is rotationally connected to the connecting shaft 611, and the rotating rod 61 is arranged eccentrically relative to the connecting shaft 611, so as to ensure that when the rotating rod 61 is rotated to be parallel to the second arc surface 235, the right end surface of the rotating rod 61 just exposes the scale line of 0° on the scale disc 6, facilitating reading; meanwhile, a limiting bolt is threadedly connected to the connecting shaft 611, so as to ensure that the rotating rod 61 will not fall off when rotating around the connecting shaft 611, and the rotating rod 61 is a telescopic rod, so as to ensure that the right end surface of the rotating rod 61 can be in contact with the surface of the door outer plate 4.

[0050] When the surfaces of the door outer plate 4 and the fender 5 are detected, the detection block 2 is fixedly connected to the hinge 3, the rotating rod 61 is rotated above the door outer plate 4 and then downward, the rotating rod 61 is stretched and lengthened, the rotating rod 61 is in contact with the surface of the door outer plate 4, and then the specific position of the rotating rod 61 on the scale disc 6 is observed, so that whether the surfaces of the door outer plate 4 and the fender 5 are parallel can be accurately obtained; and the error between the door outer plate 4 and the fender 5 is ±0.5 mm, which is within the qualified standard range, so that the first scale line 63 and the second scale line 64 on the scale disc 6 can more comprehensively determine whether the door detection is qualified.

[0051] The above is only the embodiment of the present application, and the specific technical solutions and / or common knowledge of the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the technical solutions of the present application, some deformations and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of the claims, and the specific embodiments in the description can be used to explain the content of the claims.

Claims

1. A device for detecting the door hinge axis and the door movement space envelope clearance, characterized in that: The utility model relates to a kind of detection device for vehicle door hinge, including main body and detection block, detection block is slidably arranged on main body, and detection block includes detection angle, and line and surface contact between detection angle and hinge, ensure the relationship between the coaxiality of two hinge axes on vehicle door is judged intuitively and accurately; Detection block is further provided with ladder detection piece, and ladder detection piece includes positioning surface and first detection part, first detection part is provided with first arc surface, and first arc surface is perpendicular to positioning surface, and first arc surface is consistent with the side of wing plate close to vehicle door; Ladder detection piece further includes second detection part, and second detection part is located on first detection part, and second detection part is provided with second arc surface; Ladder detection piece is provided with angle measuring device, and angle measuring device includes scale disc and rotating rod, scale disc includes scale block provided with first scale line and second scale line provided on second detection part; When detecting the surface of vehicle door outer plate and wing plate, rotating rod is located on the surface of vehicle door outer plate after rotating, and then rotating downward, so that rotating rod is attached to the surface of vehicle door outer plate, and then observing the specific position of rotating rod on scale disc can accurately obtain the result whether the surface of vehicle door outer plate and wing plate is parallel.

2. A device for detecting the axis of a door hinge and the clearance of the envelope of movement of a door according to claim 1, characterized in that: Main body is provided with arrow-shaped protrusion, detection block is provided with arrow-shaped groove, arrow-shaped protrusion is slidably connected in arrow-shaped groove, and detection block is provided with fixing screw, and one end of fixing screw is abutted to the surface of arrow-shaped protrusion.

3. A device for detecting the axis of a door hinge and the clearance of the envelope of movement of a door according to claim 2, characterized in that: Handle is connected to main body, and cavity is arranged in main body, and reinforcing plate is arranged in cavity.

4. A device for detecting the axis of a door hinge and the clearance of the envelope of movement of a door according to claim 3, characterized in that: Detection angle is acute angle.

5. A device for detecting the axis of a door hinge and the clearance of the envelope of movement of a door according to claim 4, characterized in that: Scale disc is sector, and center of scale disc is provided with connecting shaft, and rotating rod is rotatably connected to connecting shaft, and rotating rod is eccentrically arranged relative to connecting shaft.

6. A device for detecting the axis of a door hinge and the clearance of the envelope of movement of a door according to claim 5, characterized in that: Positioning surface is vertically provided with positioning block.

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