A device and method for centering and concentricity measurement of a through-piece

Abstract

The application relates to the field of building construction and discloses a device and a method for center positioning and concentricity measurement of a penetrating piece. The device comprises a main plate, a plurality of abutting pieces, a driving piece and a laser reference piece, which are used for being installed on the top of the penetrating piece. The plurality of abutting pieces are telescopically arranged on the main plate and used for abutting the inner wall of the penetrating piece along the radial direction. The driving piece is in transmission connection with the plurality of abutting pieces and used for driving the plurality of abutting pieces to telescopically extend synchronously. The laser reference piece is arranged on the upper end of the main plate and used for emitting or receiving laser light along the central axis direction of the main plate. The driving piece has an optical path channel which is through along the axial direction of the driving piece. The optical path of the laser reference piece passes through the driving piece via the optical path channel. The method is implemented by using the device. The beneficial effect of the application is that a unified concentricity measurement reference is provided for the upper and lower penetrating pieces, the measurement accuracy is ensured, and the measurement efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of building construction, and specifically to a device and method for center positioning and concentricity measurement of a through-hole component. Background Technology

[0002] In building construction, through-hole components such as electromechanical pipes and air ducts need to be installed across multiple floors. The concentricity of through-hole components between upper and lower floors is a key control indicator affecting the smooth installation and long-term stable operation of the piping system. Currently, the center positioning and concentricity measurement of through-hole components on construction sites still generally adopt traditional manual operation methods: operators use a wooden board of the same diameter as the pipe opening to cover the pipe opening, and determine the center of the circle by drawing lines at any three points on the board, connecting the lines, finding the midpoint, and drawing a perpendicular line, and then use this as a basis to adjust the alignment of the pipe openings between upper and lower floors.

[0003] The aforementioned traditional methods are essentially indirect measurements based on the principles of manual geometric drawing. Their operation has the following inherent flaws: First, the positioning steps are cumbersome. Each line-drawing and point-finding process relies on the operator's visual judgment and manual experience, easily introducing human error. Furthermore, the multiple steps amplify the accumulated error, making it difficult to guarantee the accuracy of the center positioning. Second, the center benchmark cannot be effectively fixed and transferred. Once the wooden board is removed, the center mark disappears, and the upper and lower through-pieces need to be measured independently, resulting in a lack of a unified and reliable benchmark for concentricity control. This crude measurement method often leads to excessive installation deviations in through-pieces, making subsequent pipe installations impossible to align, thus causing rework, delays, material waste, and even long-term quality problems such as leaks and equipment wear during the building's use. Summary of the Invention

[0004] To address the aforementioned technical problems, the aim is to provide a device and method for center positioning and concentricity measurement of penetrating components, providing a unified concentricity measurement benchmark for penetrating components in upper and lower layers, ensuring measurement accuracy, and improving measurement efficiency.

[0005] This invention is achieved through the following technical solution:

[0006] A device for center positioning and concentricity measurement of a penetrating component includes a main board, multiple abutment members, a driving member, and a laser reference member, for mounting on the top of the penetrating component; the multiple abutment members are retractably disposed on the main board for radially abutting against the inner wall of the penetrating component; the driving member is tractively connected to the multiple abutment members for driving the multiple abutment members to extend and retract synchronously; the laser reference member is disposed on the upper end of the main board for emitting or receiving laser light along the central axis of the main board, and the driving member has an optical path channel extending along its axial direction, through which the optical path of the laser reference member passes.

[0007] The beneficial effects of this invention are as follows: By employing a structure in which the driving component is connected to multiple abutting components and drives them to extend and retract synchronously, the operator only needs to perform a single operation to simultaneously press multiple abutting components against the inner wall of the penetrating component, thus completing the center positioning in one step. This improves measurement efficiency and completely avoids the cumulative errors caused by multiple steps in traditional geometric drawing methods. Simultaneously, by setting an axially penetrating optical path channel inside the driving component and placing the laser reference component on the upper end of the main board so that the emitted laser beam passes through the driving component via this optical path channel, the center position is mechanically locked while being transmitted non-destructively along the central axis of the main board in the form of a laser beam. This provides a unified concentricity measurement benchmark for the upper and lower penetrating components, solving the problem of independent measurement of the upper and lower layers due to the inability to fix and transmit the center mark in traditional methods. Ultimately, this eliminates quality hazards such as rework and leakage caused by installation deviations, improves the installation accuracy of the penetrating component and the first-time acceptance rate of construction, and reduces subsequent operation and maintenance costs.

[0008] In some embodiments, the driving component includes an adjustment knob lever with a central through hole along its axis, forming the optical path channel. The adjustment knob lever passes vertically through the center of the motherboard. Because an adjustment knob lever is used as the driving component, and a central through hole is provided along its axis to form the optical path channel, after the operator completes the center positioning, the laser beam emitted by the laser reference component can directly pass through the interior of the adjustment knob lever and exit along the central axis of the motherboard without moving or disassembling the device. This achieves physical consistency between the center positioning position and the laser emission position, solving the operational problem in traditional methods where the center reference disappears after the center marker (such as a wooden board) is removed, requiring re-alignment.

[0009] In some embodiments, the plurality of abutment members are rack and pinion teeth, and the driving member further includes a main spherical gear member. The main spherical gear member is coaxially connected to the adjusting knob lever and meshes with the plurality of rack and pinion teeth, for converting the rotational motion of the adjusting knob lever into the linear motion of the plurality of rack and pinion teeth. By setting the driving member as a coaxially connected main spherical gear member and adjusting knob lever, and making the main spherical gear member mesh with the plurality of rack and pinion teeth, the rotational motion of the adjusting knob lever can be transmitted to all rack and pinion teeth simultaneously through the gear and rack transmission mechanism, thereby converting a single rotational operation into the synchronous linear motion of multiple abutment members, achieving one-step center positioning, and avoiding the error accumulation problem caused by multi-step operations in traditional geometric drawing methods.

[0010] In some embodiments, the number of rack and pinion members is four, arranged radially in a cross shape. The main spherical gear member simultaneously meshes with all four rack and pinion members to drive them to extend or retract synchronously. By setting the rack and pinion members to four and arranging them radially in a cross shape, and making the main spherical gear member mesh with all four rack and pinion members simultaneously, the four rack and pinion members can simultaneously abut against the inner wall of the penetrating part from four orthogonal directions when they extend. According to geometric principles, the equidistant constraints in the four directions will inevitably cause the center of the main board to coincide with the center of the tube opening, thereby achieving purely mechanical physical self-centering, and obtaining a high-precision center position without any line drawing or point finding operations.

[0011] In some embodiments, the driving component further includes a main gear support plate, which is fixed to the bottom of the adjusting knob lever and fixedly connected to the bottom of the main gear component. The main gear support plate has a through hole coaxial with the optical path channel at its center. By providing a main gear support plate at the bottom of the adjusting knob lever and fixing it to the main gear component, and simultaneously providing a through hole coaxial with the optical path channel at its center, the main gear component obtains stable rotational support, ensuring the smoothness and accuracy of the gear and rack transmission. This also ensures that the laser beam can pass through the entire driving component without obstruction, preventing the optical path from being interrupted by the support plate.

[0012] In some embodiments, the system further includes multiple rack and tooth limiting slots, each being a C-shaped iron groove. These slots are fixed to the main board, and the corresponding rack and tooth members are slidably connected within their respective slots. By providing C-shaped iron grooves for the rack and tooth limiting slots and fixing them to the main board, the rack and tooth members are slidably connected within them. This restricts the rack and tooth members to slide only in a straight line during their extension and retraction movements, preventing radial runout or derailment under stress. This ensures that the four rack and tooth members always move in a precise radial direction, thereby ensuring the repeatability and stability of the center positioning.

[0013] In some embodiments, a locking mechanism is further included. The locking mechanism includes a locking sleeve fixedly connected to the upper end of the main board and a rubber sleeve fitted over the outside of the adjusting knob lever. At least three threaded through holes are evenly distributed radially along the locking sleeve. The adjusting knob lever is located inside the locking sleeve, and corresponding locking screws pass through the threaded through holes and abut against the outside of the adjusting knob lever. By providing a locking mechanism consisting of locking screws and a locking sleeve, and by the locking screw abutting against the outside of the rotating adjusting knob lever, the adjusting knob lever can be reliably locked after the main gear component presses against the tube wall. The preload of the rubber sleeve effectively prevents the knob from loosening due to construction vibration or gravity, thereby ensuring that the center reference remains unchanged during subsequent measurements.

[0014] In some embodiments, the laser reference component includes a laser emitter, and the device further includes multiple support columns and a mounting plate. One end of each support column is fixed to the motherboard, and the mounting plate is fixed to the other end of each support column. The laser emitter is fixed to the mounting plate, with its emitting end facing the optical path channel of the driving component. By using multiple support columns to support the mounting plate above the motherboard and fixing the laser emitter to the mounting plate with its emitting end facing the optical path channel of the driving component, a stable spaced support structure is formed between the laser emitter and the motherboard. This avoids interference between the laser emitter and the operating mechanism and ensures that the laser beam can accurately enter the optical path channel along the central axis of the motherboard.

[0015] This invention also provides a method for using the aforementioned device for center positioning and concentricity measurement of a through-piece, comprising the following steps: positioning a first device on a first through-piece, such that the center of the main board of the first device coincides with the center of a virtual circle formed by the first through-piece; positioning a second device on a second through-piece, such that the center of the main board of the second device coincides with the center of a virtual circle formed by the second through-piece, and emitting laser light from a laser reference component of the second device along the central axis of the second device; adjusting the position of the second through-piece until the laser light emitted by the second device irradiates a predetermined position on the laser reference component of the first device, the predetermined position corresponding to the center of the main board of the first device. By positioning the first and second devices on the upper and lower through-pieces respectively, and irradiating the predetermined position on the laser reference component of the first device with the laser light emitted by the second device, the center position of the upper through-piece can be adjusted in real time with the center of the lower through-piece as a reference, thereby establishing a unified concentricity reference between cross-layer through-pieces and solving the problem of inconsistent references caused by independent measurement of the upper and lower layers in traditional methods.

[0016] In some embodiments, the step of positioning the device within the through-hole includes: simultaneously extending multiple abutting members until they abut against the inner wall of the through-hole by operating a driving member, so that the center of the main board of the device coincides with the center of the through-hole. Because the device is centered by simultaneously extending multiple abutting members until they abut against the inner wall of the through-hole by operating a driving member, the operator does not need to draw lines, find points, or perform calculations; a single rotation operation is sufficient to precisely align the center of the main board with the center of the through-hole. This physical self-centering method eliminates subjective and cumulative errors caused by manual geometric drawing.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] 1. Due to the adoption of a structure in which the driving component is connected to multiple abutting components and drives them to extend and retract synchronously, the operator only needs to perform a single operation to make multiple abutting components simultaneously press against the inner wall of the penetrating component, thereby completing the center positioning in one step, improving measurement efficiency, and completely avoiding the cumulative error caused by multiple steps in the traditional geometric drawing method.

[0019] 2. By setting an axially penetrating optical path channel inside the drive component and placing the laser reference component on the upper end of the motherboard so that the emitted laser beam passes through the drive component via this optical path channel, the center position can be mechanically locked while being transmitted non-destructively along the central axis of the motherboard in the form of a laser beam. This provides a unified concentricity measurement benchmark for the upper and lower layers of the penetrating component, solving the problem of the inability to fix and transmit the center mark in the traditional method, which leads to independent measurement of the upper and lower layers. Ultimately, it eliminates quality hazards such as rework and leakage caused by installation deviations, improves the installation accuracy of the penetrating component and the first-time acceptance rate of construction, and reduces the later operation and maintenance costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0021] Figure 1 This is a schematic diagram of the device of the present invention in use.

[0022] Figure 2 This is a side view of the present invention;

[0023] Figure 3 This is a top perspective view of the present invention;

[0024] Figure 4 This is a bottom view of a portion of the structure of the present invention.

[0025] The attached diagram shows the markings and corresponding component names:

[0026] Main board 1, Adjustment knob lever 2, Main gear 3, Rack gear 4, Locking sleeve 5, Locking screw 6, Rubber sleeve 7, Main gear support plate 8, Rack gear limit slot 9, Laser emitter 10, Support column 11, Mounting plate 12, Through piece 13. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0028] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] In the description of this invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" 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 limiting the scope of protection of this invention.

[0030] The terms "first," "second," etc., used in this invention are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

[0031] Example 1

[0032] like Figures 1-4 As shown, this embodiment provides a device for center positioning and concentricity measurement of a penetrating member 13, including a main board 1, multiple abutting members, a driving member, and a laser reference member, for mounting on the top of the penetrating member 13; the multiple abutting members are retractably disposed on the main board 1 for radially abutting against the inner wall of the penetrating member 13; the driving member is drively connected to the multiple abutting members for driving the multiple abutting members to extend and retract synchronously; the laser reference member is disposed on the upper end of the main board 1 for emitting or receiving laser along the central axis of the main board 1, the driving member has an optical path channel extending along its axial direction, and the optical path of the laser reference member passes through the driving member via the optical path channel.

[0033] See Figures 1-3The driving component includes an adjustment knob lever with a central through hole along its axis, forming the optical path channel. The adjustment knob lever vertically passes through the center of the main board 1 and is welded to the main spherical gear 3. Because the adjustment knob lever is used as the driving component, and a central through hole is provided along its axis to form the optical path channel, after the operator completes the center positioning, the laser beam emitted by the laser reference component can directly pass through the interior of the adjustment knob lever and exit along the central axis of the main board 1 without moving or disassembling the device. This achieves physical unification between the center positioning position and the laser emission position, solving the operational problem in traditional methods where the center reference disappears immediately after the center marker (such as a wooden board) is removed, requiring re-alignment.

[0034] See Figures 1-4 The plurality of abutting parts are rack and pinion teeth 4, and the driving component further includes a main spherical gear 3. The main spherical gear 3 is coaxially connected to the adjusting knob lever and meshes with the plurality of rack and pinion teeth 4, used to convert the rotational motion of the adjusting knob lever into the linear motion of the plurality of rack and pinion teeth 4. By setting the driving component as a coaxially connected main spherical gear 3 and adjusting knob lever, and making the main spherical gear 3 mesh with the plurality of rack and pinion teeth 4, the rotational motion of the adjusting knob lever can be transmitted to all rack and pinion teeth 4 simultaneously through the gear and rack transmission mechanism, thereby converting a single rotational operation into the synchronous linear motion of multiple abutting parts, realizing one-step center positioning, and avoiding the error accumulation problem caused by multi-step operations in traditional geometric drawing methods.

[0035] See Figures 2-4 The four rack and tooth components are arranged in a cross-shaped radial pattern. The main spherical gear 3 simultaneously meshes with all four rack and tooth components to drive them to extend or retract synchronously. Two parallel rack and tooth components mesh with the upper end of the main spherical gear 3, and the other two parallel rack and tooth components mesh with the lower end of the main spherical gear 3. By setting four rack and tooth components in a cross-shaped radial pattern and having the main spherical gear 3 simultaneously mesh with all four rack and tooth components, the four rack and tooth components can simultaneously abut against the inner wall of the penetrating part 13 from four orthogonal directions when they extend. According to geometric principles, the equidistant constraint in four directions will inevitably cause the center of the main plate 1 to coincide with the center of the tube opening, thereby achieving purely mechanical physical self-centering. A high-precision center position can be obtained without any drawing or point-finding operations.

[0036] See Figures 1-4The driving component also includes a main gear support plate 8, which is fixed to the bottom of the adjusting knob lever and fixedly connected to the bottom of the main gear component 3. The main gear component 3 and the main gear support plate 8 can be fixedly connected by a fillet weld. The center of the main gear support plate 8 is provided with a through hole coaxial with the optical path channel. By setting the main gear support plate 8 at the bottom of the adjusting knob lever and fixing the main gear support plate 8 to the main gear component 3, and providing a through hole coaxial with the optical path channel at its center, the main gear component 3 obtains stable rotational support, ensuring the smoothness and accuracy of the gear and rack transmission, and ensuring that the laser beam can pass through the entire driving component without obstruction by the support plate.

[0037] See Figures 1-4 It also includes multiple toothed limiting slots 9, each a C-shaped iron groove, which are fixed to the main board 1 (the main board 1 and the toothed limiting slots 9 are fixedly connected by fillet welds). The corresponding four toothed components are slidably connected within their respective toothed limiting slots 9. By setting the toothed limiting slots 9 with C-shaped iron groove structures and fixing them to the main board 1, the four toothed components are slidably connected within them. This restricts the four toothed components to sliding only in a straight line within the C-shaped grooves during their extension and retraction movements, preventing radial runout or derailment when subjected to force. This ensures that the four toothed components always move in a precise radial direction, thereby ensuring the repeatability and stability of the center positioning.

[0038] See Figures 2-4 The system also includes a locking mechanism, which comprises a locking sleeve 5 fixedly connected to the upper end of the main board 1 and a rubber sleeve 7 sleeved on the outside of the adjusting knob rod 2. At least three threaded through holes are evenly distributed radially along the locking sleeve 5. The adjusting knob rod 2 is located inside the locking sleeve 5, and the corresponding locking screw 6 passes through the threaded through holes and abuts against the outside of the adjusting knob rod 2. By setting up a locking mechanism consisting of the locking screw 6 and the locking sleeve 5, and by the locking screw 6 abutting against the outside of the rotating adjusting knob rod, the adjusting knob rod can be reliably locked after the main gear 3 is pressed against the tube wall. The preload of the rubber sleeve 7 effectively prevents the knob from loosening due to construction vibration or gravity, thereby ensuring that the center reference remains unchanged during subsequent measurements.

[0039] Specifically, the adjusting knob rod is provided with an annular groove for installing the rubber sleeve 7. The rubber sleeve 7 is tightly fitted with the annular groove, which further ensures the effect of the locking screw 6 in preventing the rotating adjusting knob rod from rotating, thereby ensuring the positioning effect of the device.

[0040] See Figures 1-3The laser reference component includes a laser emitter 10. The device also includes multiple support columns 11 and a mounting plate 12. One end of each support column 11 is fixed to the main board 1, and the mounting plate 12 is fixed to the other end of each support column 11. The laser emitter 10 is fixed to the mounting plate 12, with its emitting end facing the optical path channel of the driving component. By using multiple support columns 11 to support the mounting plate 12 above the main board 1 and fixing the laser emitter 10 to the mounting plate 12 with its emitting end facing the optical path channel of the driving component, a stable spaced support structure is formed between the laser emitter 10 and the main board 1. This avoids interference between the laser emitter 10 and the operating mechanism and ensures that the laser beam can accurately enter the optical path channel along the central axis of the main board 1.

[0041] Specifically, the main board 1 is a circular steel plate base, and the circular steel plate base is provided with a groove that matches the diameter of the corresponding through part 13 to be tested.

[0042] Specifically, the configuration dimensions and connection method of this device are as follows: The main board 1 is a circular plate with dimensions of 360mm × 5mm (diameter × thickness); the adjustment knob rod 2 has a diameter of 8mm, with vertical grooves on the head, and a 2mm hollow section to facilitate the passage of the laser beam. After passing through the main sprocket, the adjustment knob rod 2 is welded to the top support plate and the main sprocket. The outer side of the adjustment knob rod 2 is a φ10mm locking sleeve 5, and a rubber sleeve 7 is tightly fitted to the outer side of the adjustment knob rod 2. The main sprocket 3 has a size of φ50mm, and the secondary rack teeth 4 are 200mm long. The main sprocket 3 meshes tightly with the four secondary rack teeth 4. The rotation of the main sprocket 3 drives the four secondary rack teeth 4 to extend outward or slide inward simultaneously. Two parallel secondary rack teeth 4 are in the same layer. The rack tooth 4 limiting clamp is a C-shaped iron groove, welded to the lower part of the steel plate base. The laser emitter 10 is fixed to the upper part of the steel plate base with bolts.

[0043] Example 2

[0044] This embodiment 2 provides a method for center positioning and concentricity measurement using the aforementioned penetrating member 13. The device of this invention is used for concentricity measurement of penetrating members 13 spanning multiple floors. Taking a two-story floor as an example, its usage is as follows:

[0045] First, center positioning of the lower through-piece 13 is performed. The first device is placed on the lower through-piece 13 (including at least two through-pieces 13 evenly distributed in a circle), so that the main board 1 of the first device mates with the corresponding through-piece 13's shaft hole to position the main board 1. Adjusting the knob lever 2 drives the main sprocket 3 to rotate, causing the four secondary rack teeth 4 to extend outwards synchronously until all four secondary rack teeth 4 are pressed against the inner wall of the corresponding through-piece 13. At this point, because the four secondary rack teeth 4 extend by the same amount, the center of the steel plate base (main board 1) of the first device automatically coincides with the center of the lower through-piece 13. Then, tightening the locking screw 6 locks the adjusting knob lever 2, keeping the first device in the center-positioned state.

[0046] Next, the center positioning of the upper through-piece 13 is performed. The second device is placed inside the upper through-piece 13, and the adjusting knob is operated in the same way to make the four secondary teeth 4 abut against the side wall of the corresponding upper through-piece 13, thus achieving the center positioning of the second device. At this time, the center of the steel plate base of the second device coincides with the center of the virtual circle formed by the upper through-piece 13, and the laser emitter 10 of the second device emits laser along the central axis of the second device. The laser beam passes through the hollow optical path channel of the adjusting knob and shoots downward.

[0047] Finally, concentricity adjustment is performed. Keeping the relative positions of the second device and the upper penetrating component 13 fixed (i.e., the four secondary teeth always pressed against the pipe wall), the upper penetrating component 13 is moved as a whole (e.g., adjusting the position of the pre-embedded sleeve), and the landing point of the laser emitted by the second device on the lower first device is observed. Since the center of the laser reference component (e.g., the laser receiving target or the light spot receiving surface) of the first device coincides with the center of its steel plate base, when the laser landing point precisely illuminates this center, it indicates that the central axis of the second device coincides with the central axis of the first device, meaning the upper penetrating component 13 and the lower penetrating component 13 are concentric. At this point, the upper penetrating component 13 can be fixed, completing the construction.

[0048] For cases spanning multiple floors, the same principle applies: using the fixed lower floor as a reference, position and adjust each floor upwards until all the through-pieces 13 on all floors are concentric.

[0049] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for center positioning and concentricity measurement of a through-hole component, characterized in that, include: The motherboard is used to mount on top of the through-hole component; Multiple abutting members are retractably disposed on the main board for radially abutting the inner wall of the penetrating member; A driving component, which is connected in a transmission manner to the plurality of abutting components, is used to drive the plurality of abutting components to extend and retract synchronously; A laser reference element is disposed on the upper end of the motherboard and is used to emit or receive lasers along the central axis of the motherboard. The driving element has an optical path channel that runs through it along its axial direction, and the optical path of the laser reference element passes through the driving element via the optical path channel.

2. The device for center positioning and concentricity measurement of a through-hole component according to claim 1, characterized in that, The driving component includes an adjustment knob lever with a central through hole along its axis. The central through hole forms the optical path channel, and the adjustment knob lever passes vertically through the center of the main board.

3. The device for center positioning and concentricity measurement of a through-hole component according to claim 2, characterized in that, The plurality of abutment members are rack and pinion teeth, and the driving member further includes a main spherical gear member. The main spherical gear member is coaxially connected to the adjusting knob rod member and meshes with the plurality of rack and pinion teeth members, for converting the rotational motion of the adjusting knob rod member into the linear motion of the plurality of rack and pinion teeth members.

4. The device for center positioning and concentricity measurement of a through-hole component according to claim 3, characterized in that, The number of rack and tooth components is four, arranged in a cross-shaped radial pattern. The main spherical gear component meshes with all four rack and tooth components simultaneously to drive the four rack and tooth components to extend or retract synchronously.

5. The device for center positioning and concentricity measurement of a through-hole component according to claim 4, characterized in that, The driving component also includes a main spherical gear support plate, which is fixed to the bottom of the adjusting knob rod and fixedly connected to the bottom of the main spherical gear component. The center of the main spherical gear support plate is provided with a through hole coaxial with the optical path channel.

6. The device for center positioning and concentricity measurement of a through-hole component according to claim 3, characterized in that, It also includes multiple toothed limiting slots, which are C-shaped iron slots. The toothed limiting slots are fixed on the main board, and the corresponding toothed components are slidably connected in the corresponding toothed limiting slots.

7. The device for center positioning and concentricity measurement of a through-hole component according to claim 2, characterized in that, It also includes a locking mechanism, which includes a locking sleeve fixedly connected to the upper end of the main board and a rubber sleeve sleeved on the outside of the adjusting knob rod. At least three threaded through holes are evenly distributed along the radial direction of the locking sleeve. The adjusting knob rod is located inside the locking sleeve, and the corresponding locking screw passes through the threaded through hole and abuts against the outside of the adjusting knob rod.

8. The apparatus for center positioning and concentricity measurement of a penetrating member according to any one of claims 1 to 7, characterized in that, The laser reference component includes a laser emitter. The device also includes multiple support columns and a mounting plate. One end of the support column is fixed to the main board, and the mounting plate is fixed to the other end of the support column. The laser emitter is fixed to the mounting plate, and the emitting end of the laser emitter is directly facing the optical path channel of the driving component.

9. A method using the apparatus for center positioning and concentricity measurement of a through-hole member as described in any one of claims 1 to 8, characterized in that, Includes the following steps: Position the first device on the first through member, so that the center of the main board of the first device coincides with the center of the virtual circle formed by the first through member; Position the second device on the second through member, so that the center of the main board of the second device coincides with the center of the virtual circle formed by the second through member, and make the laser reference member of the second device emit laser along the central axis of the second device; Adjust the position of the second penetrating member until the laser emitted by the second device irradiates a predetermined position on the laser reference member of the first device, which corresponds to the center of the main board of the first device.

10. The method according to claim 9, characterized in that, The steps of positioning the device within the penetrating member include: simultaneously extending multiple abutting members until they press against the inner wall of the penetrating member by operating the driving member, so that the center of the main board of the device coincides with the center of the penetrating member.

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