A detection mechanism and detection method for door pre-adjustment

Abstract

The application provides a detection mechanism and a detection method for door pre-adjustment, which comprises an auxiliary block and a measuring assembly; the auxiliary block is provided with an auxiliary block clamping mechanism and a guide surface; the measuring assembly comprises a measuring base, a measuring arm and a measuring sensor, and the measuring base is provided with a mounting mechanism; the measuring arm can move up and down along the vertical direction on the measuring base; the measuring sensor is arranged on the measuring base and can measure the force of the measuring arm moving up and down along the vertical direction; the auxiliary block can be clamped on a door through the clamping mechanism, and the measuring assembly can be mounted on the reference surface of the vehicle frame through the mounting mechanism; when the door is closed, the guide surface can be pressed into the lower end of the measuring arm, and the door is flush with the surrounding parts; the measuring sensor can measure the load required for the measuring arm to rise; the scheme provided by the application can directly obtain the counter deformation force value, can effectively eliminate the influence of the body rigidity, and has the advantages of lighter weight, more convenient use and stronger universality.

Description

Technical Field

[0001] This invention belongs to the technical field of vehicle door pre-adjustment detection mechanism, specifically relating to a vehicle door pre-adjustment detection mechanism and detection method. Background Technology

[0002] The automotive industry is developing rapidly. As consumers' understanding and demand for automobiles increase, their requirements for automobile quality are also increasing, especially the matching effect of the appearance. At present, in the process of body-in-white production, it is necessary to pre-adjust (anti-deformation) the deformation from welding to final assembly. Its function is to resist the sagging caused by the gravity of the final assembly accessories, so as to ensure that the doors can be naturally aligned when the whole vehicle rolls off the line.

[0003] Currently, the welding workshop uses gravity counterweights, which work by using counterweights of a certain weight to simulate the weight of the assembled parts. Because each vehicle model has different configurations, the weight of its assembly accessories varies, resulting in differences in the weight of the counterweights for different projects. The calculated counterweight weight for door accessories of several existing models is approximately 10kg to 13kg. Combined with the shape of the counterweights and the height of the doors, this makes operation extremely inconvenient for employees. Furthermore, the welding workshop controls the pre-adjustment amount based on surface differences, and the door pre-adjustment amount conversion process requires CAE analysis of the door's own stiffness before calculation. Typically, the weight of a single counterweight for assembled door accessories is over 10kg, making operation very inconvenient for employees.

[0004] There are currently no solutions to the technical problems existing in the pre-adjustment of the door structure design; therefore, there is an urgent need to find effective solutions to solve these problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the aforementioned technologies by proposing a detection mechanism and method for vehicle door pre-adjustment, aiming to solve the problems of existing vehicle door pre-adjustment detection.

[0006] This invention provides a detection mechanism for pre-adjustment of a vehicle door. The detection mechanism includes an auxiliary block and a measuring component. The auxiliary block is provided with an auxiliary block clamping mechanism and a guide surface. The measuring component includes a measuring base, a measuring arm, and a measuring sensor. The measuring base is provided with a mounting mechanism. The measuring arm is disposed on the measuring base and can move vertically up and down. The measuring sensor is disposed on the measuring base and can measure the force exerted by the vertical movement of the measuring arm. The auxiliary block can be clamped onto a vehicle door by the auxiliary block clamping mechanism, and the measuring component can be mounted on a reference surface of the vehicle frame by the mounting mechanism. When the vehicle door is closed, the guide surface can be pressed into the lower end of the measuring arm, making the vehicle door flush with its surrounding parts. When the measuring arm is pressed by the guide surface, it rises vertically, allowing the measuring sensor to measure the load required for the measuring arm to rise.

[0007] Furthermore, the reference surface is the rear door window sill or the side window sill of the vehicle frame; the mounting mechanism is a measuring clamping mechanism; the measuring component can be clamped onto the reference surface of the vehicle frame by the measuring clamping mechanism; the door is the front door.

[0008] Furthermore, the auxiliary block includes an auxiliary block base, on which a first step surface is formed, and a guide surface is disposed between the first step surface and the side surface of the auxiliary block base; the guide surface is an inclined surface or an arc-shaped surface.

[0009] Furthermore, the auxiliary block clamping mechanism is a concave clamping groove, and the auxiliary block clamping mechanism is located on the side of the auxiliary block base; the auxiliary block clamping mechanism can clamp onto the door and limit the auxiliary block along the Y direction of the frame, so that the auxiliary block base fits against the measuring surface of the door.

[0010] Furthermore, an auxiliary block positioning pin is provided on the side of the auxiliary block base. The auxiliary block positioning pin is located on one side of the auxiliary block clamping mechanism. The auxiliary block positioning pin can be inserted into the door and limit the auxiliary block along the X and Z directions of the frame.

[0011] Furthermore, a second stepped surface is formed on the measuring base, and a guide groove is provided on the side wall of one side of the second stepped surface in the vertical direction. A slider is provided on one side of the measuring arm. The measuring arm is slidably set in the guide groove through the slider and can move up and down in the vertical direction.

[0012] Furthermore, the measuring sensor is a force sensor; the force sensor is set on the second step surface and is connected to the measuring arm drive; the measuring sensor can measure the lifting force of the measuring arm during the vertical lifting and lowering process of the measuring arm, thereby determining the load required for the door to deform from the pre-adjusted position to the theoretical position.

[0013] Furthermore, the measuring assembly also includes a display head; the display head is disposed on the measuring base and electrically connected to the measuring sensor; the display head can be used to display the load measured by the measuring sensor.

[0014] Furthermore, the measuring clamping mechanism is a concave clamping groove, and the measuring clamping mechanism is located on the side of the measuring base; the measuring clamping mechanism can clamp onto the reference surface and limit the measuring base along the Y direction of the frame, so that the measuring base and the measuring arm are respectively in contact with the reference surface; the side of the measuring base is also provided with a measuring positioning pin, which is located on one side of the measuring clamping mechanism; the measuring positioning pin can be inserted into the reference surface and limit the measuring base along the X and Z directions of the frame.

[0015] Accordingly, the present invention also provides a method for detecting door pre-adjustment, employing the detection mechanism described above; the detection method includes the following steps: S1: The auxiliary block is clamped onto a car door by the auxiliary block clamping mechanism; S2: Mount the measuring component onto the reference surface of the chassis using the mounting mechanism, and ensure that the guide surface of the auxiliary block can be pressed into the lower end of the measuring arm; S3: Push the door to close. When the door is closed, it is pressed into the lower end of the measuring arm by the guide surface, making the door flush with its surrounding parts. When the measuring arm is pressed by the guide surface, it rises in the vertical direction, so that the measuring sensor can measure the load required for the measuring arm to rise. S4: Based on the load of the measuring arm, determine the load required for the door to deform from the pre-adjusted position to the theoretical position, and then evaluate whether the door's reverse deformation amount is reasonable.

[0016] Furthermore, the measuring sensor is a force sensor. The measuring sensor determines the load required for the door to deform from the pre-adjusted position to the theoretical position by measuring the lifting force during the vertical lifting and lowering process of the measuring arm; the door structure is pre-designed with anti-deformation amount.

[0017] The solution provided by this invention provides more direct measurement results, allowing for direct measurement of the anti-deformation force value and effectively eliminating the influence of vehicle body rigidity. The detection mechanism provided by this invention is lighter, easier to use, and more versatile. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the auxiliary block of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the auxiliary block of the present invention. Figure 2 ; Figure 3 The measurement component of this invention is intended to Figure 1 ; Figure 4 The measurement component of this invention is intended to Figure 2 ; Figure 5 For the present invention Figure 4 A cross-sectional view along the AA direction; Figure 6 This is a schematic diagram illustrating the working principle of a door pre-adjustment detection mechanism according to the present invention. Figure 1 ; Figure 7 This is a schematic diagram illustrating the working principle of a door pre-adjustment detection mechanism according to the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the detection mechanism for door pre-adjustment according to the present invention in use.

[0020] In the diagram: 1. Auxiliary block; 11. Auxiliary block base; 12. First step surface; 13. Guide surface; 14. Auxiliary block positioning pin; 15. Auxiliary block clamping mechanism; 2. Measuring component; 21. Measuring base; 22. Measuring arm; 23. Measuring positioning pin; 24. Measuring clamping mechanism; 25. Measuring sensor; 26. Display head; 27. Guide groove; 28. Second step surface; 29. ​​Slider; 3. Front door; 4. Rear door. Detailed Implementation

[0021] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] As shown in Figure 1 to Figure 8 As shown, this embodiment of the invention provides a detection mechanism for pre-adjustment of a car door. The detection mechanism includes an auxiliary block 1 and a measuring component 2. The auxiliary block 1 can be clamped onto the car door by a clamping mechanism, and the measuring component 2 can be mounted on a reference surface by a mounting mechanism. Specifically, the auxiliary block 1 has a guiding function, and its main function is to control the loading position of the measuring arm while protecting the appearance of the car door being tested from damage. Specifically, the auxiliary block 1 is provided with an auxiliary block clamping mechanism 15 and a guide surface 13. Further, the measuring component 2 includes a measuring base 21 and a measuring... The measuring arm 22 and measuring sensor 25 are mounted on a measuring base 21 with a mounting mechanism. The measuring arm 22 is mounted on the measuring base 21 and can move vertically. The measuring sensor 25 is mounted on the measuring base 21 and can measure the force exerted by the vertical movement of the measuring arm 22. An auxiliary block 1 can be clamped onto a car door by an auxiliary block clamping mechanism 15. The measuring assembly 2 can be mounted on a reference surface of the vehicle frame by the mounting mechanism. With the above scheme, when the car door is closed, the auxiliary block 1 can press the guide surface 13 into the measuring arm 22. At the lower end, the auxiliary block 1 will be lowered under the pressure of the measuring arm 22 to keep the door flush with its surrounding parts. Furthermore, when the measuring arm 22 is squeezed horizontally by the guide surface 13, it will rise vertically, allowing the measuring sensor 25 to measure the load required for the measuring arm 22 to rise. Based on this load value, it is possible to assess whether the current pre-adjustment state of the door meets the requirements. The door pre-adjustment detection mechanism provided in this embodiment works by contacting the measuring arm of the measuring component of the detection mechanism with the auxiliary block, which forces the flatness of the tested door and its surrounding parts from the pre-adjustment state to the whole vehicle state. The display of the measuring component shows the load required for the door to deform from the pre-adjustment position to the theoretical position. The tester compares the measured load result with the weight of the final assembly accessories to assess whether the current amount of anti-deformation on the door is reasonable. The door pre-adjustment detection mechanism provided in this invention is lighter, which can reduce the difficulty for employees to use gravity counterweights. Moreover, the result measured by this detection mechanism can be a force value, avoiding the need for repeated development of counterweights and adjustment of pre-adjustment parameters for different project models due to different configurations.

[0027] Preferably, in combination with the above scheme, as shown in Figures 1 to 12, the following methods are used: Figure 8 As shown, in this embodiment: the reference surface is the rear door window sill or the side window sill of the vehicle frame, which can effectively ensure that the door and the reference surface are in the best comparison state when the door is closed; further, the installation mechanism is a measuring clamping mechanism 24, and the measuring component 2 can be clamped on the reference surface of the vehicle frame by the measuring clamping mechanism 24, thereby realizing the installation; further, the door is preferably the front door 3, which is designed with anti-deformation amount before testing.

[0028] Preferably, in combination with the above scheme, as shown in Figures 1 to 12, the following methods are used: Figure 8 As shown, in this embodiment: the auxiliary block 1 includes an auxiliary block base 11, on which a first step surface 12 is formed. A guide surface 13 is disposed between the first step surface 12 and the side of the auxiliary block base 11, that is, the guide surface 13 is designed at the junction of the first step surface 12 and the auxiliary block base 11, so that the lower end of the measuring arm 22 can be pressed in at the optimal angle; further, the guide surface 13 is preferably designed as an inclined surface or an arc surface; specifically, when the guide surface 13 is designed as an inclined surface, the angle between the inclined surface and the horizontal plane is 42° to 46°, preferably 43° or 44°, so that the force is more uniform and the matching degree is better.

[0029] Preferably, in combination with the above scheme, as shown in Figures 1 to 12, the following methods are used: Figure 8 As shown, in this embodiment: the auxiliary block clamping mechanism 15 is a concave clamping groove, which allows it to be easily snapped onto the car door; further, the auxiliary block clamping mechanism 15 is disposed on the side of the auxiliary block base 11; specifically, the auxiliary block clamping mechanism 15 can clamp onto the car door and limit the auxiliary block 1 along the Y direction of the frame, thereby making the auxiliary block base 11 fit against the measuring surface of the car door; it should be noted that: the Y direction is the width direction of the frame in the frame rectangular coordinate system.

[0030] Preferably, in combination with the above scheme, as shown in Figures 1 to 12, the following methods are used: Figure 8 As shown in this embodiment: an auxiliary block positioning pin 14 is also provided on the side of the auxiliary block base 11. The auxiliary block positioning pin 14 is located on one side of the auxiliary block clamping mechanism 15. The auxiliary block positioning pin 14 can be inserted into the door and limit the auxiliary block 1 along the X and Z directions of the frame, so that the auxiliary block base 11 is in contact with the measuring surface of the door. It should be noted that the X direction is the length direction of the frame in the frame rectangular coordinate system, and the Z direction is the height direction of the frame in the frame rectangular coordinate system.

[0031] Preferably, in combination with the above scheme, as shown in Figures 1 to 12, the following methods are used: Figure 8 As shown, in this embodiment: a second stepped surface 28 is formed on the measuring base 21, and a guide groove 27 is provided on one side wall of the second stepped surface 28 in the vertical direction. Correspondingly, a slider 29 is provided on one side of the measuring arm 22. Specifically, the measuring arm 22 is slidably disposed in the guide groove 27 through the slider 29 and can move up and down in the vertical direction. With the above scheme, the measuring arm 22 can rise in the vertical direction when it is horizontally squeezed by the guide surface of the auxiliary block 1, and the measuring sensor 25 can perform measurement at the same time. The rear end of the measuring arm 22 is movably connected to the side wall of the measuring base 21 through the guide groove 27, which provides horizontal support for the measuring arm and ensures that the measuring arm does not rotate when subjected to force, thus affecting the measurement results of the sensor.

[0032] Preferably, in combination with the above scheme, as shown in Figures 1 to 12, the following methods are used: Figure 8 As shown, in this embodiment: the measuring sensor 25 is a force sensor; the force sensor is set on the second step surface 28 and is connected to the measuring arm 22 in a transmission manner; the measuring sensor 25 can measure the lifting force of the measuring arm 22 during the vertical lifting and lowering process of the measuring arm 22, thereby determining the load required for the door to deform from the pre-adjusted position to the theoretical position; specifically, since the reverse deformation of the door will make the front door 3 higher than the rear door 4 at the B-pillar window sill position, by using the above detection, it is possible to determine whether the pre-designed deformation amount of the door is reasonable.

[0033] Preferably, in combination with the above scheme, as shown in Figures 1 to 12, the following methods are used: Figure 8 As shown, in this embodiment: the measuring component 2 further includes a display head 26; the display head 26 is disposed on the measuring base 21 and electrically connected to the measuring sensor 25; specifically, the display head 26 can be used to display the load measured by the measuring sensor 25.

[0034] Preferably, in combination with the above scheme, as shown in Figures 1 to 12, the following methods are used: Figure 8 As shown, in this embodiment: the measuring clamping mechanism 24 is a concave clamping groove, and the measuring clamping mechanism 24 is disposed on the side of the measuring base 21; the measuring clamping mechanism 24 can clamp on the reference surface and limit the measuring base 21 along the Y direction of the frame, so that the measuring base 21 and the measuring arm 22 are respectively in contact with the reference surface; furthermore, a measuring positioning pin 23 is also provided on the side of the measuring base 21, and the measuring positioning pin 23 is disposed on one side of the measuring clamping mechanism 24; the measuring positioning pin 23 can be inserted into the reference surface and limit the measuring base 21 along the X and Z directions of the frame.

[0035] The door pre-adjustment detection mechanism provided in this embodiment of the invention is specifically a force-locking pre-adjustment detection mechanism. This detection mechanism measures the force required during the process of adjusting the door pre-adjustment amount to a completely flush state to determine whether the door pre-adjustment amount meets the standard, i.e., it measures the pressure required for the pre-adjustment amount to reach the standard surface difference state. Based on the pressure required for the door pre-adjustment amount to reach the normal surface difference, it confirms whether the pre-adjustment amount of the side door meets the requirements. This can reduce the impact of inconsistent door stiffness on the pre-adjustment amount. At the same time, it solves the problems of non-reusable measuring fixtures and excessively bulky measuring fixtures.

[0036] Accordingly, in conjunction with the above schemes, as shown in Figures 1 to 12, Figure 8 As shown, this embodiment of the invention also provides a method for detecting door pre-adjustment, employing the detection mechanism described above; wherein, the detection method includes the following steps: S1: The auxiliary block 1 is clamped onto a car door by the auxiliary block clamping mechanism 15, which is preferably the front car door 3; S2: Mount the measuring component 2 on the reference surface of the frame using the mounting mechanism, and ensure that the guide surface 13 of the auxiliary block 1 can be pressed into the lower end of the measuring arm 22; S3: Push the door to close. When the door is closed, it is pressed into the lower end of the measuring arm 22 by the guide surface 13, making the door flush with its surrounding parts. Specifically, the measuring arm 22 rises vertically when pressed by the guide surface 13, allowing the measuring sensor 25 to measure the load required for the measuring arm 22 to rise. Figure 6 As shown, when the car door is closed, the auxiliary block 11 will slide into the lower end of the measuring arm along the direction of arrow F. When the car door is closed in place, the measuring arm presses down on the auxiliary block 11 and ensures that the window sill of the car door is aligned in the vertical direction. At this time, the measuring sensor 25 transmits the force value to the display head 26, and the display head 26 displays the lifting force that the car door can provide from the anti-deformation amount. S4: Based on the load of the measuring arm 22, determine the load required for the door to deform from the pre-adjusted position to the theoretical position, and then evaluate whether the door's reverse deformation amount is reasonable. The door pre-adjustment detection method provided in this embodiment of the invention measures whether the pre-adjustment of the side door meets the standard by measuring the load during the process of the door pre-adjustment amount to a completely flush state; this detection method can avoid the influence of the stiffness difference of the door itself on the result.

[0037] Preferably, in combination with the above scheme, as shown in Figures 1 to 12, the following methods are used: Figure 8 As shown, in this embodiment: the measuring sensor 25 is a force sensor. The measuring sensor 25 measures the lifting force during the vertical lifting and lowering process of the measuring arm 22, thereby determining the load required for the door to deform from the pre-adjusted position to the theoretical position. That is, by comparing the lifting force of the door with the designed lifting force, it can be determined whether the anti-deformation design of the door is reasonable. Specifically, the anti-deformation amount is pre-designed in the structure of the door. The door pre-adjustment detection method provided in this embodiment measures the pressure during the process of the door pre-adjustment amount to be completely flush, thereby measuring whether the side door pre-adjustment amount meets the standard. This can form a universal measurement scheme, which is more suitable for different vehicle models.

[0038] Compared with traditional measuring fixtures, the solution provided by this invention provides more direct measurement results, can directly measure the anti-deformation force value, and can effectively eliminate the influence of vehicle body rigidity; the detection mechanism provided by this invention is lighter, easier to use, and more versatile.

[0039] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of the present invention without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. A detection mechanism for pre-adjustment of a vehicle door, characterized in that, The detection mechanism includes an auxiliary block (1) and a measuring component (2); the auxiliary block (1) is provided with an auxiliary block clamping mechanism (15) and a guide surface (13); the measuring component (2) includes a measuring base (21), a measuring arm (22) and a measuring sensor (25), and the measuring base (21) is provided with an installation mechanism; the measuring arm (22) is set on the measuring base (21) and can move up and down in the vertical direction; the measuring sensor (25) is set on the measuring base (21) and can measure the vertical movement of the measuring arm (22). The force of directional lifting and moving; the auxiliary block (1) can be clamped on a car door by the auxiliary block clamping mechanism (15), and the measuring component (2) can be installed on the reference surface of the frame by the mounting mechanism; when the car door is closed, it can press the guide surface (13) into the lower end of the measuring arm (22) and make the car door flush with its surrounding parts; when the measuring arm (22) is pressed by the guide surface (13), it rises in the vertical direction, so that the measuring sensor (25) can measure the load required for the measuring arm (22) to rise.

2. The detection mechanism for door pre-adjustment according to claim 1, characterized in that, The reference surface is the rear door window sill or the side window sill of the vehicle frame; the mounting mechanism is a measuring clamping mechanism (24); the measuring component (2) can be clamped on the reference surface of the vehicle frame by the measuring clamping mechanism (24); the door is the front door (3).

3. The detection mechanism for door pre-adjustment according to claim 1, characterized in that, The auxiliary block (1) includes an auxiliary block base (11), on which a first step surface (12) is formed, and a guide surface (13) is disposed between the first step surface (12) and the side surface of the auxiliary block base (11); the guide surface (13) is an inclined surface or an arc surface.

4. The detection mechanism for door pre-adjustment according to claim 3, characterized in that, The auxiliary block clamping mechanism (15) is a concave clamping groove. The auxiliary block clamping mechanism (15) is disposed on the side of the auxiliary block base (11). The auxiliary block clamping mechanism (15) can clamp on the car door and limit the auxiliary block (1) along the Y direction of the frame, so that the auxiliary block base (11) fits against the measuring surface of the car door.

5. The detection mechanism for door pre-adjustment according to claim 4, characterized in that, The auxiliary block base (11) is also provided with an auxiliary block positioning pin (14) on its side. The auxiliary block positioning pin (14) is located on one side of the auxiliary block clamping mechanism (15). The auxiliary block positioning pin (14) can be inserted into the door and limit the auxiliary block (1) along the X and Z directions of the frame.

6. The detection mechanism for door pre-adjustment according to claim 1, characterized in that, The measuring base (21) has a second step surface (28) formed on it. A guide groove (27) is provided on the side wall of the second step surface (28) in the vertical direction. A slider (29) is provided on one side of the measuring arm (22). The measuring arm (22) is slidably disposed in the guide groove (27) through the slider (29) and can move up and down in the vertical direction.

7. The detection mechanism for door pre-adjustment according to claim 6, characterized in that, The measuring sensor (25) is a force sensor; the force sensor is set on the second step surface (28) and is connected to the measuring arm (22) in a transmission manner; the measuring sensor (25) can measure the lifting force of the measuring arm (22) during the vertical lifting and lowering process of the measuring arm (22), thereby determining the load required for the door to deform from the pre-adjusted position to the theoretical position; And / or, The measuring component (2) also includes a display head (26); the display head (26) is disposed on the measuring base (21) and electrically connected to the measuring sensor (25); the display head (26) can be used to display the load measured by the measuring sensor (25).

8. The detection mechanism for door pre-adjustment according to claim 2, characterized in that, The measuring clamping mechanism (24) is a concave clamping groove, and the measuring clamping mechanism (24) is disposed on the side of the measuring base (21). The measuring clamping mechanism (24) can clamp on the reference surface and limit the measuring base (21) along the Y direction of the frame, so that the measuring base (21) and the measuring arm (22) are respectively in contact with the reference surface. The measuring base (21) is also provided with a measuring positioning pin (23) on the side, and the measuring positioning pin (23) is disposed on one side of the measuring clamping mechanism (24). The measuring positioning pin (23) can be inserted into the reference surface and limit the measuring base (21) along the X and Z directions of the frame.

9. A method for detecting pre-adjustment of a vehicle door, comprising the detection mechanism described in any one of claims 1 to 8; characterized in that, The detection method includes the following steps: S1: The auxiliary block (1) is clamped onto a car door by the auxiliary block clamping mechanism (15); S2: The measuring component (2) is mounted on the reference surface of the frame by the mounting mechanism, and the guide surface (13) of the auxiliary block (1) is pressed into the lower end of the measuring arm (22); S3: Push the car door to close. When the car door is closed, it is pressed into the lower end of the measuring arm (22) by the guide surface (13), so that the car door is flush with its surrounding parts. When the measuring arm (22) is pressed by the guide surface (13), it rises in the vertical direction, so that the measuring sensor (25) can measure the load required for the measuring arm (22) to rise. S4: Based on the load of the measuring arm (22), determine the load required for the door to deform from the pre-adjusted position to the theoretical position, and then evaluate whether the door's anti-deformation amount is reasonable.

10. The detection method for door pre-adjustment according to claim 9, characterized in that, The measuring sensor (25) is a force sensor. The measuring sensor (25) determines the load required for the door to deform from the pre-adjusted position to the theoretical position by measuring the lifting force of the measuring arm (22) during the vertical lifting process. The door structure is pre-designed with anti-deformation amount.

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