Portable positioning auxiliary device

Abstract

The invention relates to the technical field of auxiliary measurement, and discloses a portable positioning auxiliary device. According to the scheme, a plurality of rotating rods rotating around an auxiliary frame are arranged, the rotating axes of all the rotating rods are collinear, measuring pieces used for measuring the axial displacement of an experimental test piece are detachably installed on the rotating rods, and the axial displacement of the experimental test piece can be measured by rotating the rotating rods; the auxiliary frame is arranged on the rotating rod, so that the rotating rods are equally divided and positioned around the auxiliary piece, the measuring pieces mounted on the rotating rods can be synchronously and quickly equally divided and positioned around the auxiliary piece, then the measuring pieces are detached from the rotating rods, the auxiliary frame is moved away, and the experimental test piece is placed at the position where the auxiliary frame is placed. The equal division positioning of the measuring piece around the experimental test piece is realized; the operation process is convenient and fast, and the experiment efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of measurement assistance, and particularly to a portable positioning assistance device. Background Art

[0002] Currently, during the process of material experiments, universal testing presses are often used to measure the compressive strength of the structures of experimental specimens such as concrete and concrete-filled steel tubes. By measuring the actual deformation and displacement in the axial direction of the experimental specimens, the mechanical properties of the experimental specimens can be analyzed.

[0003] The currently popular method usually uses displacement gauges to assist in measuring the vertical displacement of experimental specimens. A displacement gauge is a linear device belonging to metal induction. The role of the sensor is to convert the mechanical displacement signal of the experimental specimen into an electrical signal; during the measurement process, the displacement gauges need to be evenly distributed at three equal parts around the experimental specimen (by evenly distributing the displacement gauges around the experimental specimen, the overall deformation of the experimental specimen during the loading process can be better captured, avoiding data deviation caused by local measurement). The measured displacement values at the above three positions are averaged and used as the true value of the axial displacement of the experimental specimen. However, during the use of the displacement gauge, the upward movement of the auxiliary plate of the testing press will disturb the position of the displacement gauge. Therefore, each time an experiment is carried out, the displacement gauges need to be re-positioned at three equal parts, which is a complicated and time-consuming step, affecting the experimental efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable positioning assistance device to solve the problem in the prior art that it takes a long time to equally divide and position the displacement gauges around the experimental specimen and affects the experimental efficiency.

[0005] To achieve the above purpose, the embodiments of the present application provide a portable positioning assistance device for equally dividing and positioning a measuring piece, including:

[0006] An auxiliary frame for being placed on a workbench;

[0007] A plurality of rotating rods are provided. Along the height direction of the auxiliary frame, the plurality of rotating rods are arranged at intervals. Each rotating rod is rotatably installed on the auxiliary frame, and the rotation axes of the rotating rods coincide, so that each rotating rod rotates in a plane parallel to the upper surface; the rotating rod extends away from the auxiliary frame, and one end of the rotating rod away from the axial center line of the auxiliary frame extends out of the auxiliary frame;

[0008] One end of the rotating rod extending out of the auxiliary frame has a mounting position for installing the measuring piece, and the measuring piece is detachably connected to the mounting position.

[0009] In some embodiments of the present application, the auxiliary frame includes a base, a top plate, and a connecting shaft;

[0010] Along the height direction of the auxiliary frame, the base and the top plate are spaced apart, and the connecting shaft is disposed between the base and the top plate. One end of the connecting shaft is connected to the base, and the other end is connected to the top plate;

[0011] Each of the rotating rods is rotatably mounted on the connecting shaft; angle indicating lines are provided on the periphery of the top plate.

[0012] In some embodiments of the present application, the rotating rod is a telescopic rod.

[0013] In some embodiments of the present application, the rotating rod includes a fixed rod, a sliding rod, and a locking member. The fixed rod is rotatably connected to the connecting shaft, and the sliding rod is slidably assembled at one end of the fixed rod away from the connecting shaft;

[0014] The mounting position is provided on the sliding rod, and the locking member is provided on the fixed rod and is used to lock the sliding rod.

[0015] In some embodiments of the present application, the fixed rod has a sliding cavity, and one end of the sliding cavity away from the connecting shaft communicates with the outside. At least a part of the sliding rod is located in the sliding cavity, and the sliding rod is slidably assembled with the sliding cavity.

[0016] In some embodiments of the present application, the locking member includes a locking bolt and a plurality of threaded holes. The plurality of threaded holes are spaced along the length direction of the fixed rod on the fixed rod, and each of the threaded holes communicates with the sliding cavity.

[0017] In some embodiments of the present application, an installation hole is provided at one end of the sliding rod away from the connecting shaft. Along the thickness direction of the sliding rod, the installation hole penetrates through the sliding rod, and one end of the installation hole away from the connecting shaft has an opening communicating with the outside;

[0018] A limiting plate is provided at the opening. The limiting plate is rotatably connected to the sliding rod in a plane parallel to the upper surface, and the rotation trajectory of the limiting plate has a closed position and an open position; when the limiting plate is in the closed position, the opening is blocked, and the space surrounded by the limiting plate and the installation hole forms the installation position; when the limiting plate is in the open position, the opening is opened, driving the sliding rod to move towards the connecting shaft, so that the measuring member exits from the installation hole.

[0019] In some embodiments of the present application, a lock is provided on the sliding rod for locking the limiting plate.

[0020] In some embodiments of the present application, the portable positioning assistance device further includes an auxiliary plate and a plurality of rangefinders; the auxiliary plate is used to be placed on the workbench, and the auxiliary frame is placed on the upper surface of the auxiliary plate;

[0021] The plurality of rangefinders are arranged on the upper surface of the auxiliary plate, and the plurality of rangefinders are arranged at intervals around the center of the auxiliary plate.

[0022] In some embodiments of the present application, one end of the connecting shaft is fixedly connected to one of the base and the top plate, and the other end of the connecting shaft is threadedly connected to the other.

[0023] Compared with the prior art, the beneficial effect of a portable positioning assistance device according to an embodiment of the present invention is as follows: In this solution, by providing a plurality of rotating rods that rotate around the auxiliary frame, and the rotation axes of the respective rotating rods are collinear, a measuring member for measuring the axial displacement of the experimental specimen is detachably mounted on the rotating rod. By rotating the rotating rods, the respective rotating rods are equally divided and positioned around the auxiliary member, so that the measuring members mounted on the rotating rods can be synchronously and quickly equally divided and positioned around the auxiliary member. Subsequently, the measuring members are removed from the rotating rods, and the auxiliary frame is removed, and the experimental specimen is placed at the position where the auxiliary frame was placed, that is, the equal division positioning of the measuring members around the experimental specimen is achieved; the above operation process is convenient and fast, which helps to improve the experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the use state of the portable positioning assistance device of the present invention;

[0025] Figure 2 is a schematic diagram of the overall structure of the portable positioning assistance device of the present invention;

[0026] Figure 3 is a schematic diagram of the separated state of the base and the connecting shaft of the present invention;

[0027] Figure 4 is a schematic diagram of the structure of the rotating rod of the present invention;

[0028] Figure 5 of the present invention Figure 4 is an enlarged schematic diagram of the structure at position A;

[0029] Figure 6 is a schematic diagram of the state where the limiting plate is in the open position of the present invention;

[0030] Figure 7 is a schematic diagram of the structure of the fixed rod of the present invention;

[0031] Figure 8 is a schematic diagram of the state after the measuring member is installed in place of the present invention;

[0032] Figure 9This is a schematic structural diagram of the measuring component of the present invention.

[0033] In the figure, 1 is the auxiliary plate; 11 is the distance indicating line;

[0034] 2 is the auxiliary frame; 21 is the base; 22 is the top plate; 221 is the angle indicating line; 23 is the connecting shaft;

[0035] 3 is the rotating rod; 31 is the fixed rod; 311 is the sliding cavity; 32 is the sliding rod; 321 is the mounting hole; 3211 is the opening; 322 is the limiting plate; 33 is the locking member; 331 is the locking bolt; 332 is the threaded hole;

[0036] 4 is the buckle; 5 is the laser rangefinder; 6 is the measuring component; 61 is the leveling bolt; 62 is the level gauge. Specific embodiments

[0037] The following will further describe in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0039] As Figures 1 - 9 shown, an embodiment of the present application provides a portable positioning assistance device for equally dividing and positioning the measuring component 6, including an auxiliary frame 2 and a rotating rod 3; the auxiliary frame 2 is used to be placed on the workbench (that is, the bottom plate of the experimental press), there are multiple rotating rods 3, along the thickness direction of the auxiliary plate 1, the rotating rods 3 are arranged at intervals, and the rotation axes of the rotating rods 3 coincide (are collinear), the rotating rods 3 extend in a direction away from the auxiliary frame 2, and one end of the rotating rod 3 away from the axial center line of the auxiliary component extends out of the auxiliary frame 2, one end of the rotating rod 3 extending out of the auxiliary frame 2 has a mounting position for mounting the measuring component 6 (displacement gauge), and the measuring component 6 is detachably connected to the mounting position.

[0040] In the specific implementation of this embodiment, first place the auxiliary frame 2 on the bottom plate of the experimental press, and then install the measuring member 6 in the corresponding installation position. This solution will be described by taking the setting of three rotating rods 3 and three measuring members 6 as an example (in specific implementation, the number of rotating rods 3 and measuring members 6 can be set accordingly according to experimental requirements); then rotate the rotating rod 3 so that the three rotating rods 3 rotate around the auxiliary member, and then synchronously drive the three measuring members 6 installed in the installation position to rotate synchronously. When the three rotating rods 3 are in the trisect position, the three measuring members 6 installed in the installation position are also in the trisect position; then remove the connection between the measuring member 6 and the installation position, and remove the auxiliary frame 2 and the rotating rod 3 from the bottom plate of the press, and place the experimental specimen in the original placement position of the auxiliary member. Note: The placement position of the experimental specimen needs to correspond to the original placement position of the auxiliary member. The experimental specimen in this solution is set to a columnar structure, and it is necessary to ensure that the axial center line of the experimental specimen coincides with the axial center line of the auxiliary frame 2, so as to ensure that when the experimental specimen is placed on the bottom plate of the press, the three measuring members 6 that have completed equal division positioning are also in the trisect positioning state relative to the experimental specimen; then turn on the press, drive the top plate 22 of the press to move downward and squeeze the columnar experimental specimen. The measuring member 6 is a laser displacement sensor. As Figure 9 shown, a transmitting end and a receiving end are respectively provided at the upper end of the laser displacement sensor. The laser displacement sensor measures the axial compression amount of the experimental specimen by measuring the height change of the top plate 22 of the press; four leveling bolts 61 are provided at the bottom of the measuring member 6, and a level meter 62 (a conventional bubble level, which judges whether it is level by observing the position of the bubble) is provided on the circumference of the measuring member 6. When the equal division positioning of the measuring member 6 is completed, adjust the measuring member 6 to the vertical state by observing the level meter 62 and using the four leveling bolts 61 to ensure that the laser emitted from the measuring member 6 (laser displacement sensor) is vertically upward to ensure the measurement accuracy.

[0041] In some embodiments of the present application, as Figure 2 、 Figure 3 shown, the auxiliary frame 2 includes a base 21, a top plate 22 and a connecting shaft 23; along the height direction of the auxiliary frame 2, the base 21 and the top plate 22 are arranged at intervals, and the connecting shaft 23 is arranged between the base 21 and the top plate 22. One end of the connecting shaft 23 is connected to the base 21 and the other end is connected to the top plate 22. In this embodiment, in order to facilitate matching with the experimental specimen, the base 21 and the top plate 22 are both set to circular structures, and the connecting shaft 23, the base 21 and the top plate 22 are all coaxially arranged; each rotating rod 3 is rotatably installed on the connecting shaft 23. As Figure 3 shown, the rotating rods 3 are arranged at intervals in the height direction of the auxiliary frame 2; as Figure 2 shown, an angle indication line 221 for indicating angle information is provided on the circumference of the top plate 22.

[0042] In the specific implementation of this embodiment, after the experimenter installs the measuring member 6 on the corresponding installation position respectively, the rotating rod 3 is rotated and the angle indicating line 221 provided on the peripheral side of the top plate 22 is observed, so as to quickly rotate and adjust each rotating rod 3 to the predetermined position angle.

[0043] In some embodiments of the present application, the rotating rod 3 in this solution is a telescopic rod, so that the length of the rotating rod 3 can be adjusted in advance according to the size (radial) of the experimental specimen, so that after the trisection positioning of each measuring member 6 is completed, each measuring member 6 is located outside the experimental specimen; the length of the rotating rod 3 in this solution is adjustable, so that when measuring experimental specimens with different radial sizes, the measuring member 6 can be equally divided and positioned around the peripheral side of the experimental specimen, improving the use flexibility of the positioning auxiliary device.

[0044] In some embodiments of the present application, such as Figure 2 、 Figure 4 、 Figure 7 As shown, the rotating rod 3 includes a fixed rod 31, a sliding rod 32 and a locking member 33. The fixed rod 31 is rotatably connected to the connecting shaft 23, and the sliding rod 32 is slidably assembled at one end of the fixed rod 31 away from the connecting shaft 23; the installation position is provided on the sliding rod 32, and the locking member 33 is provided on the fixed rod 31 and is used to lock the sliding rod 32; when the length of the rotating rod 3 needs to be adjusted, first release the locking of the sliding rod 32 by multiple members, and then drive the sliding rod 32 to move relative to the fixed rod 31. After moving to the required position, the sliding rod 32 is locked again by the locking member 33 (so that there is no relative movement between the sliding rod 32 and the fixed rod 31).

[0045] Preferably, a rubber damping ring can be provided at the rotating installation part of the fixed rod 31 and the connecting shaft 23 in this solution, so that the fixed rod 31 will not rotate relative to the connecting shaft 23 under the action of a certain external force, so as to ensure that when the auxiliary frame 2 and the rotating rod 3 are removed after the equal division positioning of the measuring member 6 is completed, the rotating rod 3 rotates relative to the connecting shaft 23, resulting in a change in the position of the measuring member 6 and affecting the positioning accuracy.

[0046] In some embodiments of the present application, such as Figure 7 As shown, the fixed rod 31 has a sliding cavity 311 inside, and one end of the sliding cavity 311 away from the connecting shaft 23 communicates with the outside. At least part of the sliding rod 32 is located in the sliding cavity 311, and the sliding rod 32 is slidably assembled with the sliding cavity 311. The outer periphery of the sliding rod 32 is in close contact with the inner wall of the sliding cavity 311. Drive the sliding rod 32 to move relative to the fixed rod 31, and then control the length of the sliding rod 32 extending out of the sliding cavity 311 to adjust the length of the rotating rod 3.

[0047] In some embodiments of the present application, such as Figure 4As shown, the locking member 33 includes a locking bolt 331 and a plurality of threaded holes 332. The plurality of threaded holes 332 are arranged on the fixing rod 31 at intervals along the length direction of the fixing rod 31, and each threaded hole 332 communicates with the sliding cavity 311. The locking bolt 331 is threadedly assembled in the threaded hole 332 and the locking bolt 331 abuts against the wall of the sliding rod 32 located in the sliding cavity 311. Through the abutting pressure between the locking bolt 331 and the sliding rod 32, the locking and positioning of the sliding rod 32 are realized. When the sliding rod 32 extends out of the sliding cavity 311 by different lengths, the locking bolt 331 and different threaded holes 332 can be threadedly assembled.

[0048] In some embodiments of the present application, as Figure 5 , Figure 6 shown, an installation hole 321 is provided at one end of the sliding rod 32 away from the connecting shaft 23. Along the thickness direction of the sliding rod 32, the installation hole 321 penetrates the sliding rod 32. One end of the installation hole 321 away from the connecting shaft 23 has an opening 3211 communicating with the outside. A limiting plate 322 is provided at the opening 3211. The limiting plate 322 is rotatably connected to the sliding rod 32 in a plane parallel to the plane where the sliding rod 32 is located, and the rotation trajectory of the limiting plate 322 has a closed position and an open position. As Figure 5 shown, it is the state where the limiting plate 322 is in the closed position, which is used to block the opening 3211, and at this time, the space surrounded by the limiting plate 322 and the installation hole 321 forms an installation position. As Figure 6 shown, it is the state where the limiting plate 322 is in the open position, which is used to open the opening 3211. At this time, the sliding rod 32 is driven to move towards the connecting shaft 23, so that the measuring member 6 exits from the installation hole 321, and thus the measuring member 6 is withdrawn from the installation position.

[0049] It should be noted that: in this solution, the size of the installation hole 321 should match the circumferential size of the measuring member 6, that is, when the measuring member 6 is located in the installation hole 321, the circumferential side of the measuring member 6 is in close contact with the inner wall of the installation hole 321, so as to ensure that when the rotating rod 3 rotates, the measuring member 6 can be synchronously driven to rotate with the rotating rod 3.

[0050] In some embodiments of the present application, as Figure 4 , Figure 5 shown, a lock 4 for locking the limiting plate 322 is provided at a position of the sliding rod 32 close to the limiting plate 322. When the limiting plate 322 is in the closed position, the limiting plate 322 and the sliding rod 32 are connected and fixed through the lock 4. When it is necessary to withdraw the measuring member 6 from the installation hole 321, the lock 4 can be opened (as Figure 6 shown).

[0051] In some embodiments of the present application, as Figure 1As shown, the portable positioning assistance device further includes an auxiliary plate 1 and multiple rangefinders; the auxiliary plate 1 is used to be placed on the workbench (the bottom plate of the experimental press), and the auxiliary frame 2 is placed on the upper surface of the auxiliary plate 1; the multiple rangefinders are arranged on the upper surface of the auxiliary plate 1, and the multiple rangefinders are arranged at intervals around the center of the auxiliary plate 1; as Figure 1 As shown, an annular distance indication line 11 (each annular distance indication line 11 marks the corresponding distance parameter) is provided on the upper surface of the auxiliary plate 1, which is used to mark the distance from the center of the auxiliary plate 1, so as to realize that when testing experimental specimens with different radial dimensions, through the distance indication line 11 provided on the upper surface of the auxiliary plate 1, the position where the rotating rod 3 needs to be extended (that is, the position of the installation position from the center of the auxiliary plate 1) can be quickly judged, which helps to improve work efficiency.

[0052] In the specific implementation of this embodiment, first place the auxiliary plate 1 on the bottom plate of the experimental press, and then place the auxiliary frame 2 on the upper surface of the auxiliary plate 1. Through the multiple rangefinders, adjust the auxiliary frame 2 to be located at the center position of the auxiliary plate 1. The multiple rangefinders are arranged at intervals around the center of the auxiliary plate 1. By observing the distances between each rangefinder and the auxiliary member, when the readings are consistent, it indicates that the auxiliary frame 2 is now located at the center position of the auxiliary plate 1; then the measuring member 6 is installed in the installation position, and the rotating rod 3 is rotated to make the measuring member 6 perform rapid equal division positioning around the auxiliary member. After the equal division positioning of the measuring member 6 is completed, the auxiliary frame 2 and the rotating rod 3 are removed from the auxiliary plate 1, as Figure 8 As shown, at this time, place the experimental specimen on the auxiliary plate 1 again. By observing the readings of the rangefinders, when the readings are consistent, it indicates that the experimental specimen is now at the center position of the auxiliary plate 1, so that the adjusted measuring member 6 performs three-equal division positioning around the experimental specimen.

[0053] In some embodiments of the present application, as Figure 3 As shown, one end of the connecting shaft 23 is fixedly connected to one of the base 21 and the top plate 22, and the other end of the connecting shaft 23 is threadedly connected to the other, so that the base 21 and the top plate 22 are detachably installed. When the base 21 and the top plate 22 are separated, different numbers of rotating rods 3 can be selectively rotated and installed on the connecting shaft 23 to meet the measurement requirements of different experiments.

[0054] The working process of the present invention is as follows: First, the experimenter places the auxiliary plate 1 on the bottom plate of the experimental press, and then places the auxiliary member on the upper surface of the auxiliary plate 1. By observing the readings of the rangefinder, the auxiliary frame 2 is adjusted to be located at the center position of the auxiliary plate 1. Subsequently, the measuring member 6 is installed in the installation position, and the rotating rod 3 is rotated to quickly equally divide and position each measuring member 6 around the auxiliary frame 2. Then, the auxiliary frame 2 is removed from the auxiliary plate 1, and the experimental specimen is placed on the auxiliary plate 1. By observing the readings of each rangefinder, the experimental specimen is adjusted to be located at the center position of the auxiliary plate 1. At this time, each measuring member 6 equally divides and positions around the experimental specimen.

[0055] In summary, the embodiment of the present invention provides a portable positioning auxiliary device. In this solution, a plurality of rotating rods that rotate around the auxiliary frame are provided, and the rotation axes of the rotating rods are collinear. A measuring member for measuring the axial displacement of the experimental specimen is detachably installed on the rotating rod. By rotating the rotating rod, each rotating rod equally divides and positions around the auxiliary member, and thus it can be synchronously realized that the measuring members installed on the rotating rod equally divide and position around the auxiliary member. Subsequently, the measuring member is removed from the rotating rod, and the auxiliary frame is removed. The experimental specimen is placed at the position where the auxiliary frame was placed, that is, the equal division positioning of the measuring member around the experimental specimen is realized. The above operation process is convenient and fast, which helps to improve the experimental efficiency.

[0056] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A portable positioning auxiliary device for equally positioning a measuring piece (6), characterized in that: include: An auxiliary frame (2), used for being placed on a workbench; A plurality of rotating rods (3) are provided, and the plurality of rotating rods (3) are arranged at intervals along the height direction of the auxiliary frame (2); each rotating rod (3) is rotatably mounted on the auxiliary frame (2), and the rotation axes of each rotating rod (3) coincide with each other, so that each rotating rod (3) rotates in a plane parallel to the upper surface; the rotating rod (3) extends in a direction away from the auxiliary frame (2), and one end of the rotating rod (3) away from the axial center line of the auxiliary frame (2) protrudes outward from the auxiliary frame (2); One end of the rotating rod (3) extending outward from the auxiliary frame (2) has a mounting position for mounting the measuring piece (6), and the measuring piece (6) is detachably connected to the mounting position.

2. The portable positioning auxiliary device according to claim 1, characterized in that: The auxiliary frame (2) comprises a base (21), a top plate (22) and a connecting shaft (23); Along the height direction of the auxiliary frame (2), the base (21) and the top plate (22) are arranged at intervals, and the connecting shaft (23) is arranged between the base (21) and the top plate (22), one end of the connecting shaft (23) is connected to the base (21), and the other end is connected to the top plate (22); Each of the rotating rods (3) is rotatably mounted on the connecting shaft (23); and an angle indicating line (221) is provided on the circumference of the top plate (22).

3. The portable positioning auxiliary device according to claim 2, characterized in that: The rotating rod (3) is a telescopic rod.

4. The portable positioning auxiliary device according to claim 3, characterized in that: The rotating rod (3) comprises a fixed rod (31), a sliding rod (32) and a locking member (33); the fixed rod (31) is rotatably connected to the connecting shaft (23); and the sliding rod (32) is slidably assembled on an end of the fixed rod (31) away from the connecting shaft (23); The mounting position is arranged on the sliding rod (32), and the locking member (33) is arranged on the fixing rod (31) and is used to lock the sliding rod (32).

5. The portable positioning auxiliary device according to claim 4, characterized in that: The fixed rod (31) has a sliding cavity (311) therein, and one end of the sliding cavity (311) away from the connecting shaft (23) is in communication with the outside, the sliding rod (32) is at least partially located in the sliding cavity (311), and the sliding rod (32) is slidably assembled with the sliding cavity (311).

6. The portable positioning auxiliary device according to claim 5, characterized in that: The locking member (33) comprises a locking bolt (331) and a plurality of threaded holes (332). The plurality of threaded holes (332) are arranged on the fixing rod (31) at intervals along the length direction of the fixing rod (31), and each of the threaded holes (332) is communicated with the sliding cavity (311).

7. The portable positioning auxiliary device according to claim 4, characterized in that: The sliding rod (32) is provided with a mounting hole (321) at one end away from the connecting shaft (23); the mounting hole (321) penetrates the sliding rod (32) along the thickness direction of the sliding rod (32); and the mounting hole (321) is provided with an opening (3211) communicating with the outside at one end away from the connecting shaft (23); The opening (3211) is provided with a limiting plate (322), and the limiting plate (322) is rotatably connected to the sliding rod (32) in a plane parallel to the upper surface, and the rotation trajectory of the limiting plate (322) has a closed position and an open position; when the limiting plate (322) is in the closed position, the opening (3211) is blocked, and the limiting plate (322) and the mounting hole (321) enclose a space to form the mounting position; when the limiting plate (322) is in the open position, the opening (3211) is opened, and the sliding rod (32) is driven to move toward the connecting shaft (23), so that the measuring member (6) withdraws from the mounting hole (321).

8. The portable positioning auxiliary device according to claim 7, characterized in that: The sliding rod (32) is provided with a lock buckle (4) for locking the limiting plate (322).

9. The portable positioning auxiliary device according to any one of claims 1 to 8, characterized in that: The portable positioning auxiliary device further comprises an auxiliary plate (1) and a plurality of distance meters; the auxiliary plate (1) is used to be placed on the workbench, and the auxiliary frame (2) is placed on the upper surface of the auxiliary plate (1); The plurality of distance meters are arranged on the upper surface of the auxiliary plate (1), and the plurality of distance meters are arranged at intervals around the center of the auxiliary plate (1).

10. The portable positioning auxiliary device according to any one of claims 2 to 8, characterized in that: One end of the connecting shaft (23) is fixedly connected to one of the base (21) and the top plate (22), and the other end of the connecting shaft (23) is threadedly connected to the other.

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