A slot position coordinate measurement auxiliary device and method

Abstract

The present application relates to the technical field of slot hole coordinate measurement, in particular to a kind of slot hole position coordinate measurement auxiliary device and method, the slot hole position coordinate measurement auxiliary device includes: two first adjusting strips of interval arrangement, two second adjusting strips of interval arrangement and drive shaft.Two first adjusting strips are along X direction arrangement;Two second adjusting strips are along Y direction arrangement, and the length of first adjusting strip is less than the length of second adjusting strip;Drive shaft is along Z direction arrangement, between two first adjusting strips and two second adjusting strips, and with first adjusting strip and second adjusting strip transmission connection, for driving two first adjusting strips and two second adjusting strips move towards opposite direction, and when first adjusting strip is resisted in the inner wall of slot hole, it is disconnected with the transmission connection of first adjusting strip.Can solve the problem that the slot hole position coordinate measurement auxiliary device in prior art cannot determine the center position of slot feature hole.

Description

Technical Field

[0001] This invention relates to the field of slot coordinate measurement technology, and specifically to an auxiliary device and method for measuring slot position coordinates. Background Technology

[0002] To better monitor the dimensional manufacturing accuracy of car bodies during the prototyping and manufacturing phase, meet the assembly accuracy requirements of the entire vehicle, and ensure that the vehicle is in the design and development stage, major OEMs currently use coordinate measuring machines (CMMs) to inspect and evaluate the dimensional accuracy of the body-in-white. However, when measuring mounting holes inside the side panels of the body assembly, the CMM has blind spots due to its limited A-angle (0-105 degrees). This prevents the CMM from directly detecting the center coordinates of mounting holes such as round holes, round slots, and square holes. Currently, the industry typically addresses this by modifying the measuring arm structure and adding wrist measurement functionality at a significant cost, but this method is quite expensive. Alternatively, a spherical auxiliary hemisphere can be used to adhere to the mounting hole on the body, with a movable conical cylinder engaging with the mounting hole to use the center of the hemisphere to represent the center position of the hole. However, the conical locating pins used in this device cannot perform center positioning detection for slotted or square holes. Furthermore, it also presents technical limitations for fixing aluminum body panels that cannot be magnetically attached.

[0003] The prior art discloses a contact-type coordinate measuring machine (CMM) hemisphere for automotive parts. This hemisphere comprises a hemisphere, a magnet embedded within the hemisphere, and a spring-loaded tapered locating pin. The magnet on the bottom surface of the hemisphere attracts and contacts the automotive part. The retractable tapered locating pin, with varying circle diameters, ensures that the center positions of the part and the auxiliary hemisphere are concentric, thus using the center position of the hemisphere to replace the position of the circular hole.

[0004] Currently, it can only be used for inspecting welded car bodies made of iron or steel, and cannot be applied to welded car bodies made of aluminum alloy; in addition, it cannot determine the center position of groove-shaped feature holes. Summary of the Invention

[0005] In view of the deficiencies in the existing technology, the purpose of the present invention is to provide an auxiliary device and method for measuring the position coordinates of slots, which can solve the problems of existing auxiliary devices for measuring the position coordinates of slots, which cannot determine the center position of slot-shaped feature holes and are difficult to fix on aluminum car bodies.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] On one hand, the present invention provides an auxiliary device for measuring the position coordinates of a slot, comprising:

[0008] Two first adjustment bars are spaced apart and are positioned along the X direction;

[0009] Two second adjustment bars are spaced apart, the second adjustment bars are set along the Y direction, and the length of the first adjustment bar is less than the length of the second adjustment bar;

[0010] A drive shaft, which is arranged along the Z direction, is located between the two first adjusting bars and the two second adjusting bars, and is drively connected to both the first adjusting bars and the two second adjusting bars. It is used to drive the two first adjusting bars and the two second adjusting bars to move in opposite directions, and disengages from the drive connection with the first adjusting bars when the first adjusting bars abut against the inner wall of the slot.

[0011] In some alternative solutions, both the first and second adjusting bars are racks, the drive shaft is driven to the second adjusting bar via a fixed gear coaxially connected to it, and the drive shaft is driven to the first adjusting bar via a movable gear coaxially arranged to it.

[0012] In some alternative solutions, the end of the drive shaft is provided with a magnetic core rod, and the middle of the movable gear is provided with a through hole fitted onto the magnetic core rod, with the magnetic core rod having a clearance fit with the magnetic core rod through the through hole.

[0013] In some alternative designs, the through hole is a stepped hole, with the larger section of the stepped hole located away from the drive shaft, and the shape of the magnetic core rod matches the stepped hole.

[0014] In some alternative solutions, the slot position coordinate measuring auxiliary device also includes:

[0015] The first limiting member has two first slides, which are respectively used to install the two first adjusting strips;

[0016] The second limiting member has two second slides, which are used to install the two second adjusting strips respectively.

[0017] In some alternative solutions, the first slide rail has a first limiting groove on its side wall, the first adjusting strip has a first limiting pin on its side wall, the second slide rail has a second limiting groove on its side wall, and the second adjusting strip has a second limiting pin on its side wall.

[0018] In some alternative solutions, the ends of the two first adjustment bars that move in opposite directions are provided with first positioning blocks, and the ends of the two second adjustment bars that move in opposite directions are provided with second positioning blocks. The first positioning blocks extend a predetermined length toward the second adjustment bars, and the second positioning blocks extend a predetermined length toward the first positioning blocks.

[0019] In some alternative solutions, the slot position coordinate measuring auxiliary device further includes an auxiliary measuring hemisphere, the center line of which is coaxial with the drive shaft, and the end of the drive shaft passes through the auxiliary measuring hemisphere. The first adjustment bar and the second adjustment bar are located on one side of the opening direction of the auxiliary measuring hemisphere.

[0020] In some alternative solutions, the end of the auxiliary measuring hemisphere opening direction is provided with multiple magnetic positioning bosses in the circumferential direction.

[0021] On the other hand, the present invention also provides a method for measuring the position coordinates of a slot, which is implemented using the slot position coordinate measuring auxiliary device described in any of the above claims, and includes the following steps:

[0022] Place the first adjusting bar and two second adjusting bars into the slot, rotate the drive shaft to drive the two first adjusting bars and two second adjusting bars to move simultaneously in opposite directions, and when the first adjusting bar abuts against the inner wall of the slot, the drive shaft disengages from the transmission connection with the first adjusting bar.

[0023] Continue rotating the drive shaft to drive the two second adjustment bars to extend further until both second adjustment bars are abutting against the inner wall of the slot.

[0024] The center coordinates of the slot are determined by measuring the coordinates of the drive shaft or its auxiliary measuring components.

[0025] Compared with the prior art, the advantages of this invention are as follows: In this solution, since the length of the first adjusting strip is less than the length of the second adjusting strip, when the first adjusting strip abuts against the inner wall of the slot, it disengages from the transmission connection with the second adjusting strip. When measuring slots that are not circular or square, after the end of the first adjusting strip abuts against the inner wall of the slot, the second adjusting strip can continue to extend without further extending the first adjusting strip, until both second adjusting strips abut against the inner wall of the slot. This allows the drive shaft to be centered, and the center coordinates of the slot can be determined by measuring the coordinates of the drive shaft or the auxiliary measuring component on it. After both the first and second adjusting strips abut against the inner wall of the slot, the entire auxiliary measuring device can be secured inside the slot. Therefore, this device can be used for auxiliary inspection of automotive parts made of iron and aluminum materials, has a wider range of applications, and solves the problem of difficulty in detecting the center position coordinates of slots in some parts under the background of automotive lightweighting. This device can be used for center positioning and auxiliary detection of circular and square slot holes within a certain range. It does not require the use of complex devices such as external actuating cylinders. It only requires simple tools to achieve positioning and locking functions, making it more convenient and with lower operating costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the slot position coordinate measuring auxiliary device in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the slot position coordinate measuring auxiliary device in an embodiment of the present invention, excluding the limiting component;

[0029] Figure 3 This is a top view schematic diagram of the slot position coordinate measuring auxiliary device in an embodiment of the present invention;

[0030] Figure 4 This is a schematic cross-sectional view of the first adjustment bar in an embodiment of the present invention;

[0031] Figure 5 This is a cross-sectional view of the second adjustment strip in an embodiment of the present invention;

[0032] Figure 6 This is a front view schematic diagram of the slot position coordinate measuring auxiliary device in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the measurement auxiliary device after adding an auxiliary measuring hemisphere in an embodiment of the present invention.

[0034] In the diagram: 1. First adjusting strip; 11. First limiting pin; 2. Second adjusting strip; 21. Second limiting pin; 3. Drive shaft; 31. Adjusting knob; 41. Movable gear; 42. Fixed gear; 5. Magnetic core rod; 61. First limiting component; 62. Second limiting component; 71. First positioning block; 72. Second positioning block; 8. Auxiliary measuring hemisphere; 9. Magnetic positioning boss; 10. Body sheet metal surface. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] like Figures 1 to 6 As shown, in one aspect, the present invention provides an auxiliary device for measuring the position coordinates of a slot, comprising: two spaced-apart first adjusting bars 1, two spaced-apart second adjusting bars 2, and a drive shaft 3. The two first adjusting bars 1 are arranged along the X direction; the two second adjusting bars 2 are arranged along the Y direction, and the length of the first adjusting bars 1 is less than the length of the second adjusting bars 2; the drive shaft 3 is arranged along the Z direction, located between the two first adjusting bars 1 and the two second adjusting bars 2, and is drively connected to both the first adjusting bars 1 and the two adjusting bars 2, for driving the two first adjusting bars 1 and the two second adjusting bars 2 to move in opposite directions, and disengaging from the drive connection with the first adjusting bars 1 when the first adjusting bars 1 abut against the inner wall of the slot.

[0038] When using the slot position coordinate measuring auxiliary device, the first adjusting strip 1 and the second adjusting strip 2 are placed in the slot. If the slot is not circular or square, the first adjusting strip 1 is positioned along the width direction of the slot, and the second adjusting strip 2 is positioned along the length direction of the slot. The drive shaft 3 is rotated to drive the two first adjusting strips 1 and the two second adjusting strips 2 to move simultaneously in opposite directions. When one of the first adjusting strips 1 abuts against the inner wall of the slot, the drive shaft 3 is rotated again. Under the action of the reaction force of the first adjusting strip 1 against the inner wall of the slot, the drive shaft will move towards the center of the slot until both first adjusting strips 1 abut against the inner wall of the slot. At this point, the drive shaft 3 is disengaged from the transmission connection with the first adjusting strips 1. The drive shaft 3 is rotated again to drive the two second adjusting strips 2 to continue to extend until both second adjusting strips 2 abut against the inner wall of the slot. At this point, the drive shaft 3 is located at the center of the slot. The center coordinates of the slot are determined by measuring the coordinates of the drive shaft 3 or the auxiliary measuring component on it. In this scheme, since the length of the first adjusting strip 1 is less than the length of the second adjusting strip 2, when the first adjusting strip 1 abuts against the inner wall of the slot, it is disengaged from the transmission connection with the first adjusting strip 1. When measuring slots that are not circular or square, the end of the first adjusting strip 1 is first made to abut against the inner wall of the slot. Without making the first adjusting strip 1 continue to extend, the second adjusting strip 2 can continue to extend until both second adjusting strips 2 abut against the inner wall of the slot. This allows the drive shaft 3 to be centered. By measuring the coordinates of the drive shaft 3 or its auxiliary measuring parts, the center coordinates of the slot can be known.

[0039] In this example, the X, Y, and Z directions are perpendicular to each other. If a coordinate system of X, Y, and Z axes is established, then the X direction is the X-axis direction, the Y direction is the Y-axis direction, and the Z direction is the Z-axis direction. The two first adjustment bars 1 are symmetrically arranged along the X-axis, and their lengths extending in opposite directions are symmetrical along the Y-axis. The two second adjustment bars 2 are symmetrically arranged along the Y-axis, and their lengths extending in opposite directions are symmetrical along the X-axis. The drive shaft 3 is arranged along the Z-axis.

[0040] like Figures 2 to 5 As shown, in some optional embodiments, both the first adjusting bar 1 and the second adjusting bar 2 are racks, the drive shaft 3 is connected to the second adjusting bar 2 via a fixed gear 42 coaxially connected to it, and the drive shaft 3 is connected to the first adjusting bar 1 via a movable gear 41 coaxially arranged with it.

[0041] In this embodiment, the fixed gear 42 is located inside the movable gear 41 and is fixedly connected to the drive shaft 3. Two second adjusting bars 2 are respectively disposed on both sides of the fixed gear 42 and mesh with it. Two first adjusting bars 1 are respectively disposed on both sides of the movable gear 41 and mesh with it. The connection between the movable gear 41 and the drive shaft 3 is a detachable connection. When the force of the drive shaft 3 driving the movable gear 41 is greater than a set value, that is, when the first adjusting bar 1 abuts against the inner wall of the slot, the drive shaft 3 will disengage from the transmission connection with the first adjusting bar 1. In this way, when the first adjusting bar 1 abuts against the inner wall of the slot, the drive shaft 3 can continue to rotate, driving the second adjusting bar 2 to continue to extend until it abuts against the inner wall of the slot.

[0042] In some optional embodiments, the end of the drive shaft 3 is provided with a magnetic core rod 5, and the middle of the movable gear 41 is provided with a through hole that is sleeved on the magnetic core rod 5, and the magnetic core rod 5 is in clearance fit with the magnetic core rod 5 through the through hole.

[0043] In this embodiment, a magnetic core rod 5 is fitted onto the end of the drive shaft 3 through a through hole in the middle of the movable gear 41. When the first adjusting strip 1 is not against the inner wall of the slot, the movable gear 41 will rotate together with the magnetic core rod 5 and the drive shaft 3 due to the attraction between the magnetic core rod 5 and the movable gear 41. When one of the first adjusting strips 1 is against the inner wall of the slot, the drive shaft 3 continues to rotate. Due to the attraction between the magnetic core rod 5 and the movable gear 41, the movable gear 41 continues to rotate. Under the action of the reaction force of the first adjusting strip 1 against the inner wall of the slot, the drive shaft 3 will move towards the center of the slot until both first adjusting strips 1 are against the inner wall of the slot, and then it continues to rotate. When the driving force of the drive shaft 3 is greater than the attraction force between the magnetic core rod 5 and the movable gear 41, the movable gear 41 will slip relative to the magnetic core rod 5, that is, the drive shaft 3 will disengage from the transmission connection with the first adjusting bar 1. If the drive shaft 3 continues to rotate, it will drive the two second adjusting bars 2 to continue to extend. When one of the second adjusting bars 2 abuts against the inner wall of the slot, the drive shaft 3 will continue to rotate. Under the action of the reaction force of the second adjusting bar 2 abutting against the inner wall of the slot, the drive shaft 3 will move towards the center of the slot until both second adjusting bars 2 abut against the inner wall of the slot. At this time, the drive shaft 3 is located at the center of the slot. The center coordinates of the slot can be determined by measuring the coordinates of the drive shaft 3 or its auxiliary measuring parts.

[0044] The magnetic core rod 5 has a wear-resistant coating on its surface. After assembly, it has good coaxiality with the drive shaft 3, and all the arc surfaces have good roundness and cylindricity. The fit gap between each component is very small, and the relative measurement error can be ignored.

[0045] In some alternative embodiments, the through hole is a stepped hole, with the larger section of the stepped hole located on the side away from the drive shaft 3, and the shape of the magnetic core 5 matches the stepped hole.

[0046] In this embodiment, the stepped hole includes a perforated section and a small hole section. The magnetic core rod 5 is also stepped in shape. The magnetic core rod 5 is passed through the stepped hole and connected to the drive shaft 3. The magnetic core rod 5 and the stepped hole cooperate to relatively restrict the axial position of the movable gear 41 relative to the drive shaft 3, preventing the movable gear 41 from disengaging from the magnetic core rod 5.

[0047] In some optional embodiments, the slot position coordinate measuring auxiliary device further includes: a first limiting member 61 and a second limiting member 62. The first limiting member 61 is provided with two first slides for mounting two first adjusting strips 1 respectively; the second limiting member 62 is provided with two second slides for mounting two second adjusting strips 2 respectively.

[0048] In this embodiment, the first limiting member 61 is located below the first adjusting strip 1. The first limiting member 61 is provided with two first slides, and the two first adjusting strips 1 are respectively disposed in the two first slides. When the driving shaft 3 drives the movable gear 41 to move the two first adjusting strips 1 in opposite directions, the first slides can restrict the movement direction of the first adjusting strips 1, so as to prevent the first adjusting strips 1 from deviating from the movement trajectory, thereby causing inaccurate measurement results.

[0049] The second limiting member 62 is provided with two second slides, and two second adjusting bars 2 are respectively located in the two second slides. When the fixed gear 42 is driven by the drive shaft 3 to move the two second adjusting bars 2 in opposite directions, the second slides can restrict the movement direction of the second adjusting bars 2, so as to prevent the second adjusting bars 2 from deviating from the movement trajectory, thereby causing inaccurate measurement results.

[0050] In some optional embodiments, a first limiting groove is provided on the side wall of the first slide rail, a first limiting pin 11 is provided on the side wall of the first adjusting strip 1, a second limiting groove is provided on the side wall of the second slide rail, and a second limiting pin 21 is provided on the side wall of the second adjusting strip 2.

[0051] In this embodiment, the first adjusting bar 1 is a rack, and a first limiting pin 11 is provided on the side wall of the first adjusting bar 1 facing away from the teeth. A first limiting groove matching the first limiting pin 11 is provided on the side wall of the first slide. When the first adjusting bar 1 slides relative to the first slide, the first limiting pin 11 can limit the position of the first adjusting bar 1 relative to the first slide in the axial direction of the drive shaft 3, so as to avoid the position of the first adjusting bar 1 moving, thereby causing inaccurate measurement results.

[0052] The second adjusting bar 2 is also a rack. A second limiting pin 21 is provided on the side wall of the second adjusting bar 2 facing away from the teeth. A second limiting groove matching the second limiting pin 21 is provided on the side wall of the second slide. When the second adjusting bar 2 slides relative to the second slide, the second limiting pin 21 can limit the position of the second adjusting bar 2 relative to the second slide in the axial direction of the drive shaft 3, so as to avoid the position of the second adjusting bar 2 moving, thereby causing inaccurate measurement results.

[0053] In some optional embodiments, the ends of the two first adjustment bars 1 that move in opposite directions are provided with first positioning blocks 71, and the ends of the two second adjustment bars 2 that move in opposite directions are provided with second positioning blocks 72. The first positioning blocks 71 extend a predetermined length toward the second adjustment bars 2, and the second positioning blocks 72 extend a predetermined length toward the first positioning blocks 71.

[0054] In this embodiment, the first positioning block 71 is a cuboid structure, and the second positioning block 72 is an arc-shaped structure, used to abut against the side wall of the slot when the first adjusting strip 1 and the second adjusting strip 2 are extended. In this example, the first positioning block 71 extends a predetermined length towards the second adjusting strip 2, and the second positioning block 72 extends a predetermined length towards the first positioning block 71, so that the first positioning block 71 and the second positioning block 72 have an overlapping portion in the axial direction of the drive shaft 3. This ensures that when the first adjusting strip 1 and the second adjusting strip 2 are extended, the first positioning block 71 and the second positioning block 72 can abut against the inner wall of the slot.

[0055] Furthermore, the other end of the first positioning block 71 is flush with the first adjusting strip 1, and the other end of the second positioning block 72 is flush with the second adjusting strip 2. The set length by which the first positioning block 71 extends toward the second adjusting strip 2 is 1 / 3 of the width of the first adjusting strip 1 in the axial direction of the drive shaft 3, and the set length by which the second positioning block 72 extends toward the first positioning block 71 is 1 / 3 of the width of the second adjusting strip 2 in the axial direction of the drive shaft 3, and the widths of the first adjusting strip 1 and the second adjusting strip 2 in the axial direction of the drive shaft 3 are equal.

[0056] like Figure 7As shown, in some optional embodiments, the slot position coordinate measuring auxiliary device further includes an auxiliary measuring hemisphere 8, the center line of symmetry of the auxiliary measuring hemisphere 8 is coaxial with the drive shaft 3, and the end of the drive shaft 3 passes through the auxiliary measuring hemisphere 8. The first adjustment bar 1 and the second adjustment bar 2 are located on the side of the opening direction of the auxiliary measuring hemisphere 8.

[0057] In this embodiment, an auxiliary measuring hemisphere 8 is provided at the end of the drive shaft 3, such that the first adjusting strip 1 and the second adjusting strip 2 are located on the side of the opening direction of the auxiliary measuring hemisphere 8, and the first adjusting strip 1 and the second adjusting strip 2 protrude to the outside of the auxiliary measuring hemisphere 8.

[0058] In use, the auxiliary measuring hemisphere 8 is attached to the plane to be measured with slots, and the first adjusting strip 1 and the second adjusting strip 2 are inserted into the slots. The first adjusting strip 1 and the second adjusting strip 2 are moved by the drive shaft 3 to abut against the inner wall of the slot, achieving alignment between the drive shaft 3 and the center of the slot. Since the center line of symmetry of the auxiliary measuring hemisphere 8 is coaxial with the drive shaft 3, the probe of the coordinate measuring machine normally measures the measuring hemisphere of the auxiliary measuring hemisphere 8, thus obtaining the coordinate value of the center position of the auxiliary measuring hemisphere 8. The coordinate value of the center position of the auxiliary measuring hemisphere 8 is approximately equal to the coordinate value of the slot being measured.

[0059] In addition, an adjustment knob 31 is provided at the end of the drive shaft 3 that passes through the auxiliary measuring hemisphere 8, so as to facilitate turning the adjustment knob 31 to drive the drive shaft 3 to rotate.

[0060] In some optional embodiments, the end of the auxiliary measuring hemisphere 8 in the opening direction is provided with a plurality of magnetic positioning protrusions 9 in the circumferential direction.

[0061] In this example, four evenly spaced magnetic positioning bosses 9 are provided at the end of the auxiliary measuring hemisphere 8 in the circumferential direction. When measuring the center of the slot using this device, the magnetic positioning bosses 9 can be used to attach the auxiliary measuring hemisphere 8 to the plane being measured, such as the sheet metal surface 10 of a car body. In addition, the magnetic force of the magnetic positioning bosses 9 is less than the magnetic force of the magnetic core rod 5. When one of the first adjusting bars 1 is pressed against the inner wall of the slot, the drive shaft 3 continues to rotate. Due to the attraction between the magnetic core rod 5 and the movable gear 41, the movable gear 41 continues to rotate. Under the action of the reaction force of the first adjusting bar 1 pressed against the inner wall of the slot, the drive shaft 3 will move towards the center of the slot, and the auxiliary measuring hemisphere 8 will also move along with it.

[0062] On the other hand, the present invention also provides a method for measuring the position coordinates of a slot, which is implemented using any of the slot position coordinate measuring auxiliary devices described above, and includes the following steps:

[0063] S1: Place the first adjusting bar 1 and the two second adjusting bars 2 into the slot, rotate the drive shaft 3 to drive the two first adjusting bars 1 and the two second adjusting bars 2 to move simultaneously in opposite directions. When the first adjusting bar 1 abuts against the inner wall of the slot, the drive shaft 3 disengages from the transmission connection with the first adjusting bar 1.

[0064] S2: Continue to rotate the drive shaft 3 to drive the two second adjustment bars 2 to continue to extend until both second adjustment bars 2 are abutting against the inner wall of the slot.

[0065] S3: Determine the center coordinates of the slot by measuring the coordinates of the drive shaft 3 or its auxiliary measuring parts.

[0066] When using the slot position coordinate measuring auxiliary device, the first adjusting strip 1 and the second adjusting strip 2 are placed in the slot. If the slot is not circular or square, the first adjusting strip 1 is positioned along the width direction of the slot, and the second adjusting strip 2 is positioned along the length direction of the slot. The drive shaft 3 is rotated to drive the two first adjusting strips 1 and the two second adjusting strips 2 to move simultaneously in opposite directions. When one of the first adjusting strips 1 abuts against the inner wall of the slot, the drive shaft 3 is rotated again. Under the action of the reaction force of the first adjusting strip 1 against the inner wall of the slot, the drive shaft will move towards the center of the slot until both first adjusting strips 1 abut against the inner wall of the slot. At this point, the drive shaft 3 is disengaged from the transmission connection with the first adjusting strips 1. The drive shaft 3 is rotated again to drive the two second adjusting strips 2 to continue to extend until both second adjusting strips 2 abut against the inner wall of the slot. At this point, the drive shaft 3 is located at the center of the slot. The center coordinates of the slot are determined by measuring the coordinates of the drive shaft 3 or the auxiliary measuring component on it. In this solution, since the length of the first adjusting strip 1 is less than the length of the second adjusting strip 2, when the first adjusting strip 1 abuts against the inner wall of the slot, it disengages from the transmission connection with the second adjusting strip 2. When measuring slots that are not circular or square, the end of the first adjusting strip 1 is first made to abut against the inner wall of the slot. Without allowing the first adjusting strip 1 to extend further, the second adjusting strip 2 can continue to extend until both second adjusting strips 2 abut against the inner wall of the slot. This allows the drive shaft 3 to be centered. By measuring the coordinates of the drive shaft 3 or its auxiliary measuring components, the center coordinates of the slot can be determined. After both the first and second adjusting strips are abutted against the inner wall of the slot, the entire auxiliary measuring device can be secured within the slot. Therefore, this device can be used for auxiliary inspection of automotive parts made of iron and aluminum materials, has a wider range of applications, and solves the problem of difficult detection of the center position coordinates of slots in some parts under the current automotive lightweighting context. This device can be used for center positioning and auxiliary detection of circular and square slot holes within a certain range. It does not require the use of complex devices such as external actuating cylinders. It only requires simple tools to achieve positioning and locking functions, making it more convenient and with lower operating costs.

[0067] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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 between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0068] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0069] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An auxiliary device for measuring the position coordinates of a slot, characterized in that, include: Two first adjustment bars (1) are set at intervals, and the first adjustment bars (1) are set along the X direction; Two second adjustment bars (2) are set at intervals, the second adjustment bars (2) are set along the Y direction, and the length of the first adjustment bar (1) is less than the length of the second adjustment bar (2); The drive shaft (3) is arranged along the Z direction, located between the two first adjustment bars (1) and the two second adjustment bars (2), and is connected to both the first adjustment bars (1) and the two adjustment bars (2) in a transmission connection. It is used to drive the two first adjustment bars (1) and the two second adjustment bars (2) to move in opposite directions, and disengages from the transmission connection with the first adjustment bar (1) when the first adjustment bar (1) abuts against the inner wall of the slot.

2. The slot position coordinate measuring auxiliary device as described in claim 1, characterized in that: The first adjustment bar (1) and the second adjustment bar (2) are both racks. The drive shaft (3) is connected to the second adjustment bar (2) through a fixed gear (42) coaxially connected to it. The drive shaft (3) is connected to the first adjustment bar (1) through a movable gear (41) coaxially arranged with it.

3. The slot position coordinate measuring auxiliary device as described in claim 2, characterized in that: The end of the drive shaft (3) is provided with a magnetic core rod (5), and the middle part of the movable gear (41) is provided with a through hole sleeved on the magnetic core rod (5). The magnetic core rod (5) is in clearance fit with the magnetic core rod (5) through the through hole.

4. The slot position coordinate measuring auxiliary device as described in claim 3, characterized in that: The through hole is a stepped hole, and the larger section of the stepped hole is located on the side away from the drive shaft (3). The shape of the magnetic core rod (5) matches the stepped hole.

5. The slot position coordinate measuring auxiliary device as described in claim 1, characterized in that, Also includes: The first limiting member (61) has two first slides, which are used to install two first adjusting strips (1). The second limiting member (62) has two second slides, which are used to install two second adjusting strips (2).

6. The slot position coordinate measuring auxiliary device as described in claim 5, characterized in that, The first slide is provided with a first limiting groove on its side wall, the first adjusting bar (1) is provided with a first limiting pin (11) on its side wall, the second slide is provided with a second limiting groove on its side wall, and the second adjusting bar (2) is provided with a second limiting pin (21) on its side wall.

7. The slot position coordinate measuring auxiliary device as described in claim 1, characterized in that, The ends of the two first adjustment bars (1) that move in opposite directions are provided with first positioning blocks (71), and the ends of the two second adjustment bars (2) that move in opposite directions are provided with second positioning blocks (72). The first positioning blocks (71) extend a set length toward the second adjustment bars (2), and the second positioning blocks (72) extend a set length toward the first positioning blocks (71).

8. The slot position coordinate measuring auxiliary device as described in claim 1, characterized in that, It also includes an auxiliary measuring hemisphere (8), the center line of which is coaxial with the drive shaft (3), and the end of the drive shaft (3) passes through the auxiliary measuring hemisphere (8). The first adjustment bar (1) and the second adjustment bar (2) are located on one side of the opening direction of the auxiliary measuring hemisphere (8).

9. The slot position coordinate measuring auxiliary device as described in claim 8, characterized in that, The end of the auxiliary measuring hemisphere (8) in the opening direction is provided with multiple magnetic positioning bosses (9) in the circumferential direction.

10. A method for measuring the position coordinates of a slot, characterized in that, This is achieved using the slot position coordinate measuring auxiliary device as described in any one of claims 1-9, characterized in that: Place the first adjusting bar (1) and two second adjusting bars (2) into the slot, rotate the drive shaft (3) to drive the two first adjusting bars (1) and two second adjusting bars (2) to move in opposite directions at the same time. When the first adjusting bar (1) abuts against the inner wall of the slot, the drive shaft (3) disengages from the transmission connection with the first adjusting bar (1). Continue to rotate the drive shaft (3) to drive the two second adjustment bars (2) to continue to extend until both second adjustment bars (2) are against the inner wall of the slot; The center coordinates of the slot are determined by measuring the coordinates of the drive shaft (3) or its auxiliary measuring parts.

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