Positioning device

Abstract

The positioning device comprises a positioning mechanism and an adjusting mechanism, the positioning mechanism is used for positioning a main body of a heat exchanger, the adjusting mechanism is used for positioning a gas-liquid pipe of the heat exchanger, and the adjusting mechanism can adjust the position of the gas-liquid pipe in the X-axis direction, the Y-axis direction and the Z-axis direction so that the gas-liquid pipe can be aligned with the main body. According to the utility model, the main body of the heat exchanger is firstly positioned through the positioning mechanism, then the position of the gas-liquid pipe is adjusted through the adjusting mechanism, so that the gas-liquid pipe and the main body are accurately aligned, then the gas-liquid pipe with the adjusted position is positioned through the adjusting mechanism, and finally the main body and the gas-liquid pipe are assembled to form the heat exchanger. After the main body and the gas-liquid pipe are positioned and aligned for the first time through the positioning mechanism and the adjusting mechanism, the main body and the gas-liquid pipe of the same model can be used in a unified manner subsequently, and the positioning mechanism and the adjusting mechanism do not need to be adjusted again, so that the labor intensity can be remarkably reduced, and the production efficiency can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger assembly technology, specifically relating to a positioning device. Background Technology

[0002] Currently, in the air conditioning manufacturing industry, the production of evaporators for indoor air conditioning units involves a process of separately positioning the evaporator body and the gas-liquid pipes before assembling them. The positioning of both the evaporator body and the gas-liquid pipes is done manually, which is not only labor-intensive but also inefficient. After the gas-liquid pipes and body are assembled, operations such as air leak detection, helium leak detection, and refrigerant charging can be performed on the evaporator through the gas-liquid pipes. Utility Model Content

[0003] Therefore, this utility model provides a positioning device that can solve the technical problem that the positioning of the evaporator body and the gas-liquid pipe is done manually, resulting in high labor intensity and low production efficiency.

[0004] To address the aforementioned problems, this utility model provides a positioning device, comprising a positioning mechanism and an adjustment mechanism. The positioning mechanism is used to position the main body of the heat exchanger, and the adjustment mechanism is used to position the gas-liquid pipe of the heat exchanger. Furthermore, the adjustment mechanism can adjust the position of the gas-liquid pipe in three directions—X-axis, Y-axis, and Z-axis—to align the gas-liquid pipe with the main body.

[0005] In some embodiments, the adjustment mechanism includes a first guide rail extending along the X-axis and a first sliding member slidably assembled on the first guide rail, with the gas-liquid pipe located on the first sliding member.

[0006] In some embodiments, the first guide rail is provided with a plurality of first slots, each of the first slots being distributed sequentially at intervals along the extension direction of the first guide rail. The first sliding member is provided with a first mounting hole, in which a first elastic member and a first locking member connected to the free end of the first elastic member are installed. The first locking member can engage with any of the first slots.

[0007] In some embodiments, the first card is a sphere, and the volume of the first card in any of the first card slots is less than or equal to half the volume of the first card.

[0008] In some embodiments, the adjustment mechanism further includes a second guide rail extending along the Z-axis and a second slider slidably assembled on the second guide rail, wherein the first guide rail is fixed on the second slider.

[0009] In some embodiments, the second guide rail is provided with a plurality of second slots, each of the second slots being distributed sequentially at intervals along the extension direction of the second guide rail. The second sliding member is provided with a second mounting hole, in which a second elastic member and a second locking member connected to the free end of the second elastic member are installed. The second locking member can engage with any of the second slots.

[0010] In some embodiments, the second card is a sphere, and the volume of the second card in any of the second card slots is less than or equal to half the volume of the second card.

[0011] In some embodiments, the adjustment mechanism further includes a third guide rail extending along the Y-axis and a third slider slidably assembled on the third guide rail, wherein the second guide rail is fixed on the third slider.

[0012] In some embodiments, the third guide rail is provided with a plurality of third slots, each of the third slots being distributed at intervals along the extension direction of the third guide rail. The third sliding member is provided with a third mounting hole, in which a third elastic member and a third locking member connected to the free end of the third elastic member are installed. The third locking member can engage with any of the third slots.

[0013] In some embodiments, the third card is a sphere, and the volume of the third card in any of the third card slots is less than or equal to half the volume of the third card.

[0014] In some embodiments, the positioning mechanism includes a first positioning component and a second positioning component, with the main body sandwiched between the first positioning component and the second positioning component.

[0015] In some embodiments, the first positioning component includes a first positioning plate and a second positioning plate assembled on one side of the first positioning plate, with an included angle between the first positioning plate and the second positioning plate. The main body includes a first portion and a second portion inclined relative to the first portion. The first portion is clamped between the first positioning plate and the second positioning component, and the second portion is fitted to the second positioning plate.

[0016] In some embodiments, the position of the second positioning plate relative to the first positioning plate is adjustable.

[0017] The positioning device provided by this utility model has the following beneficial effects:

[0018] First, the main body of the heat exchanger is positioned using a positioning mechanism. Then, the position of the gas-liquid pipes is adjusted using an adjusting mechanism to ensure accurate alignment with the main body. Next, the adjusted gas-liquid pipes are positioned again using the adjusting mechanism. Finally, the main body and gas-liquid pipes are assembled to form the heat exchanger. Once the main body and gas-liquid pipes are initially positioned and aligned using the positioning and adjusting mechanisms, subsequent main bodies and gas-liquid pipes of the same model can be used interchangeably without needing to readjust the positioning and adjusting mechanisms. Therefore, the entire production process can significantly reduce labor intensity and improve production efficiency. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the positioning device according to an embodiment of the present utility model;

[0021] Figure 2 This is a rear view of the positioning device according to an embodiment of the present utility model;

[0022] Figure 3 This is a left view of the positioning device according to an embodiment of the present utility model;

[0023] Figure 4 This is a top view of the adjustment mechanism of the positioning device according to an embodiment of the present utility model;

[0024] Figure 5 for Figure 4 Enlarged diagram of point A in the diagram;

[0025] Figure 6 This is a front view of the heat exchanger body and gas-liquid pipe after they have been aligned and assembled on the positioning device in this embodiment of the utility model.

[0026] Figure 7 The right view of the heat exchanger body and gas-liquid pipe after they are aligned and assembled on the positioning device of this utility model embodiment;

[0027] Figure 8 The left view of the heat exchanger body and gas-liquid pipe after they have been aligned and assembled on the positioning device of this utility model embodiment;

[0028] Figure 9 for Figure 8 Enlarged diagram of point B in the diagram;

[0029] Figure 10The rear view of the heat exchanger body and gas-liquid pipe after they have been aligned and assembled on the positioning device in this embodiment of the utility model.

[0030] Figure 11 This is a top view of the heat exchanger body and gas-liquid pipe after they have been aligned and assembled on the positioning device in this embodiment of the utility model.

[0031] The reference numerals in the attached figures are as follows:

[0032] 1. Positioning mechanism; 11. First positioning component; 111. First positioning plate; 112. Second positioning plate; 12. Second positioning component; 121. Linkage structure; 122. Pressure plate; 2. Adjustment mechanism; 21. First guide rail; 22. First sliding member; 23. First elastic member; 24. First locking member; 25. Second guide rail; 26. Second sliding member; 27. Third guide rail; 28. Third sliding member; 3. Heat exchanger; 31. Main body; 311. First part; 312. Second part; 32. Gas-liquid pipe; 4. First slot; 5. Second slot; 6. Third slot; 7. Base plate; 8. Notch. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0034] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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 utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0035] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0036] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0037] See also Figures 1 to 11 As shown, according to an embodiment of the present invention, a positioning device is provided, including a positioning mechanism 1 and an adjustment mechanism 2. The positioning mechanism 1 is used to position the main body 31 of the heat exchanger 3, and the adjustment mechanism 2 is used to position the gas-liquid pipe 32 of the heat exchanger 3. The adjustment mechanism 2 can adjust the position of the gas-liquid pipe 32 in the three directions of X-axis, Y-axis and Z-axis so that the gas-liquid pipe 32 is aligned with the main body 31.

[0038] In this technical solution, the main body 31 of the heat exchanger 3 is first positioned using the positioning mechanism 1. Then, the position of the gas-liquid pipe 32 is adjusted using the adjustment mechanism 2 to ensure accurate alignment between the gas-liquid pipe 32 and the main body 31. Next, the adjusted gas-liquid pipe 32 is positioned again using the adjustment mechanism 2. Finally, the main body 31 and the gas-liquid pipe 32 are assembled to form the heat exchanger 3. After the main body 31 and the gas-liquid pipe 32 are initially positioned and aligned using the positioning mechanism 1 and the adjustment mechanism 2, subsequent main bodies and gas-liquid pipes of the same model can be used interchangeably without further adjustment of the positioning mechanism 1 and the adjustment mechanism 2. Therefore, the entire production process can significantly reduce labor intensity and improve production efficiency. It should be noted that manual positioning methods are subject to fluctuations, and the accuracy of positioning largely depends on the operator's skill level. The positioning device of this application can solve the problem of fluctuations inherent in manual positioning methods.

[0039] See also Figure 1 , Figures 4 to 6As shown, the adjustment mechanism 2 includes a first guide rail 21 extending along the X-axis and a first sliding member 22 slidably assembled on the first guide rail 21, with the gas-liquid pipe 32 located on the first sliding member 22.

[0040] In this embodiment, since the first guide rail 21 extends along the X-axis direction and the gas-liquid pipe 32 is disposed on the first sliding member 22, when the first sliding member 22 slides along the first guide rail 21, the gas-liquid pipe 32 can move along the X-axis direction, thereby realizing the position adjustment of the gas-liquid pipe 32 in the X-axis direction.

[0041] It should be noted that the first sliding member 22 has two notches 8, and there are two gas-liquid pipes 32, one of which is a gas-liquid inlet pipe and the other is a gas-liquid outlet pipe. The gas-liquid inlet pipe and the gas-liquid outlet pipe are respectively engaged in the two notches 8. It is required that the gas-liquid inlet pipe and the gas-liquid outlet pipe be as vertical as possible in the two notches 8, which is more conducive to the alignment and assembly of the gas-liquid pipe 32 with the main body 31. After the gas-liquid inlet pipe and the gas-liquid outlet pipe are respectively aligned and assembled with the main body 31 of the heat exchanger 3, the airtightness of the heat exchanger can be tested by introducing air through the gas-liquid inlet pipe and expelling air through the gas-liquid outlet pipe. At the same time, refrigerant can also be injected into the heat exchanger through the gas-liquid inlet pipe.

[0042] See also Figure 4 and Figure 5 As shown, a plurality of first slots 4 are constructed on the first guide rail 21, and each first slot 4 is distributed sequentially at intervals along the extension direction of the first guide rail 21. A first mounting hole is constructed on the first sliding member 22, and a first elastic member 23 and a first locking member 24 connected to the free end of the first elastic member 23 are installed in the first mounting hole. The first locking member 24 can engage with any of the first slots 4.

[0043] In this technical solution, since the first locking member 24 can engage with any of the first slots 4, after the first sliding member 22 slides into place along the first guide rail 21, the first locking member 24 engages with the first slot 4 to position the first sliding member 22 on the first guide rail 21, thereby achieving the positioning of the gas-liquid pipe 32 after its position is adjusted along the X-axis.

[0044] See Figure 5 As shown, the first card 24 is a spherical body, and the volume of the first card 24 in any first card slot 4 is less than or equal to half the volume of the first card 24.

[0045] In this embodiment, when the volume of the spherical first locking member 24 within any first locking slot 4 is less than or equal to half of its own volume, it can not only engage with any first locking slot 4, but also, when adjusting the position of the first sliding member 22, simply moving the first sliding member 22 along the first guide rail 21 will automatically remove the first locking member 24 from the first locking slot 4, making the position adjustment of the first sliding member 22 on the first guide rail 21 more convenient. This is mainly because when no more than half of the volume of the sphere is within the first locking slot 4, if the sphere is subjected to an external force along the X-axis, it will easily and automatically disengage from the first locking slot 4; while when the first sliding member 22 is not subjected to an external force, the elastic force applied by the first elastic member 23 to the sphere will cause the sphere to engage within the first locking slot 4, thereby achieving the positioning of the first sliding member 22 on the first guide rail 21.

[0046] See also Figure 1 and Figure 2 As shown, the adjustment mechanism 2 also includes a second guide rail 25 extending along the Z-axis and a second sliding member 26 slidably assembled on the second guide rail 25, with the first guide rail 21 fixed on the second sliding member 26.

[0047] In this technical solution, since the second guide rail 25 extends along the Z-axis direction, and the first guide rail 21 is fixed on the second sliding member 26, when the second sliding member 26 slides along the second guide rail 25, the gas-liquid pipe 32 can move along the Z-axis direction, thereby achieving position adjustment of the gas-liquid pipe 32 in the Z-axis direction. Preferably, there are two second guide rails 25, and the second sliding member 26 is simultaneously slidably disposed on both second guide rails 25, which makes the movement of the first guide rail 21 by the second sliding member 26 more stable.

[0048] In one specific implementation, the second guide rail 25 is provided with a plurality of second slots 5, and each second slot 5 is distributed sequentially at intervals along the extension direction of the second guide rail 25. The second sliding member 26 is provided with a second mounting hole, and a second elastic member and a second locking member connected to the free end of the second elastic member are installed in the second mounting hole. The second locking member can engage with any of the second slots 5.

[0049] In this embodiment, since the second locking member can engage with any of the second slots 5, after the second sliding member 26 slides into place along the second guide rail 25, the second locking member engages with the second slot 5 to position the second sliding member 26 on the second guide rail 25, thereby achieving the positioning of the gas-liquid pipe 32 after its position is adjusted along the Z-axis.

[0050] More specifically, the second card is a spherical body, and the volume of the second card in any second card slot 5 is less than or equal to half the volume of the second card.

[0051] In this technical solution, when the volume of the spherical second locking member within any second slot 5 is less than or equal to half of its own volume, it can achieve engagement between the second locking member and any second slot 5. Furthermore, when adjusting the position of the second sliding member 26, simply moving the second sliding member 26 along the second guide rail 25 automatically moves the second locking member out of the second slot 5, making position adjustment of the second sliding member 26 on the second guide rail 25 more convenient. This is mainly because when no more than half of the spherical body's volume is within the second slot 5, it will easily and automatically detach from the second slot 5 if subjected to an external force along the Z-axis. Conversely, when the second sliding member 26 is not subjected to external force, the elastic force applied by the second elastic member to the spherical body will cause the spherical body to engage within the second slot 5, thus achieving the positioning of the second sliding member 26 on the second guide rail 25. It should be noted that the combination method of the second elastic member and the second locking member can be found in [reference needed]. Figure 5 The combination of the first elastic element 23 and the first locking element 24 is shown.

[0052] See also Figure 3 , Figure 8 and Figure 9 As shown, the adjustment mechanism 2 also includes a third guide rail 27 extending along the Y-axis and a third sliding member 28 slidably assembled on the third guide rail 27, with the second guide rail 25 fixed on the third sliding member 28.

[0053] In this technical solution, since the third guide rail 27 extends along the Y-axis direction and the second guide rail 25 is fixed on the third sliding member 28, when the third sliding member 28 slides along the third guide rail 27, the gas-liquid pipe 32 can move along the Y-axis direction, thereby realizing the position adjustment of the gas-liquid pipe 32 in the Y-axis direction.

[0054] In one specific implementation, the third guide rail 27 is provided with a plurality of third slots 6, and each third slot 6 is distributed sequentially at intervals along the extension direction of the third guide rail 27. The third sliding member 28 is provided with a third mounting hole, and a third elastic member and a third locking member connected to the free end of the third elastic member are installed in the third mounting hole. The third locking member can engage with any of the third slots 6.

[0055] In this embodiment, since the third locking member can engage with any of the third slots 6, after the third sliding member 28 slides into place along the third guide rail 27, the third locking member engages with the third slot 6 to position the third sliding member 28 on the third guide rail 27, thereby achieving the positioning of the gas-liquid pipe 32 after its position is adjusted along the Y-axis.

[0056] More specifically, the third card is a spherical body, and the volume of the third card in any third card slot 6 is less than or equal to half the volume of the third card.

[0057] In this technical solution, when the volume of the spherical third locking member within any third locking slot 6 is less than or equal to half of its own volume, it can achieve engagement between the third locking member and any third locking slot 6. Furthermore, when adjusting the position of the third sliding member 28, simply moving the third sliding member 28 along the third guide rail 27 automatically removes the third locking member from the third locking slot 6, making position adjustment of the third sliding member 28 on the third guide rail 27 more convenient. This is mainly because when no more than half of the spherical body's volume is within the third locking slot 6, it will easily and automatically detach from the third locking slot 6 if subjected to an external force along the Y-axis. Conversely, when the third sliding member 28 is not subjected to external force, the elastic force applied by the third elastic member to the spherical body will cause the spherical body to engage within the third locking slot 6, thus achieving positioning of the third sliding member 28 on the third guide rail 27. It should be noted that the combination method of the third elastic member and the third locking member can be found in [reference needed]. Figure 5 The combination of the first elastic element 23 and the first locking element 24 is shown.

[0058] See also Figure 1 , Figure 6 and Figure 7 As shown, the positioning mechanism 1 includes a first positioning component 11 and a second positioning component 12, and the main body 31 is sandwiched between the first positioning component 11 and the second positioning component 12.

[0059] In this embodiment, the main body 31 is positioned by clamping the main body 31 with the first positioning component 11 and the second positioning component 12.

[0060] See also Figure 1 , Figure 6 , Figure 7 and Figure 11 As shown, the first positioning component 11 includes a first positioning plate 111 and a second positioning plate 112 assembled on one side of the first positioning plate 111. An angle is formed between the first positioning plate 111 and the second positioning plate 112. The main body 31 includes a first part 311 and a second part 312 inclined relative to the first part 311. The first part 311 is clamped between the first positioning plate 111 and the second positioning component 12, and the second part 312 is attached to the second positioning plate 112.

[0061] In this technical solution, when the first part 311 of the main body 31 is clamped between the first positioning plate 111 and the second positioning component 12, and the second part 312 of the main body 31 is in contact with the second positioning plate 112, it indicates that the first positioning component 11 can not only position flat plate heat exchangers, but also two-stage or more-stage heat exchangers, thus making the positioning device more widely applicable. For example, it can be applied to the condenser of the outdoor unit, and also to the evaporator of the indoor unit. It should be noted that the second positioning component 12 includes a connecting rod structure 121 and a pressure plate 122 fixed on the connecting rod structure 121. A rubber pad is provided on the pressure plate 122. The cylinder drives the connecting rod structure 121 to move, thereby clamping the first part 311 between the pressure plate 122 and the first positioning plate 111. The rubber pad has a buffering effect and can prevent the fins on the first part 311 from falling over due to clamping. The connecting rod structure 121 is designed with a limit mechanism to prevent the connecting rod structure 121 from jamming. Furthermore, the design height of the second positioning plate 112 is approximately 1 / 3 of the average height of the main body 31 of all models of heat exchangers 3. This will allow a significant portion of the main body 31 of the heat exchanger 3 to be exposed after it is positioned, thus facilitating the robotic arm to grip and pick up the assembled heat exchanger 3.

[0062] In one specific implementation, the position of the second positioning plate 112 relative to the first positioning plate 111 is adjustable. This allows the included angle between the second positioning plate 112 and the first positioning plate 111 to be adjusted, thus the positioning device of this application can be applied to various types of heat exchangers. More specifically, the second positioning plate 112 has three adjustment positions. When the second positioning plate 112 is in these three adjustment positions, the included angle between the second positioning plate 112 and the first positioning plate 111 is 70°, 75°, and 80°, respectively. In addition, the adjustment mechanism 2 can adjust the position of the gas-liquid pipe 32 in the X-axis, Y-axis, and Z-axis directions. According to statistics, the positioning device of this application can be used for the precise positioning of 4 different structures and 26 different specifications of heat exchangers. It should also be noted that the second positioning plate 112 is equipped with a pneumatic pin. When external air pressure is applied, the pin is lifted through the internal channel. The external adjustment device adjusts the loosened second positioning plate 112 to the corresponding angle position, thereby achieving plate limit. The large torsion spring realizes the plate return, thus achieving the universal bending angle positioning effect of the heat exchanger.

[0063] Finally, it should be noted that the entire operation process is as follows: Adjust the angle of the second positioning plate 112, place the main body 31 between the first positioning component 11 and the second positioning component 12, the cylinder drives the second positioning component 12 to clamp the first part 311 of the main body 31, the second part 312 of the main body 31 is close to the second positioning plate 112, the adjustment mechanism 2 adjusts the position of the gas-liquid pipe 32 in the three directions of X-axis, Y-axis and Z-axis, so that the gas-liquid pipe 32 is accurately aligned with the main body 31, and finally assemble the gas-liquid pipe 32 with the main body 31.

[0064] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0065] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A positioning device, characterized in that, It includes a positioning mechanism (1) and an adjustment mechanism (2). The positioning mechanism (1) is used to position the main body (31) of the heat exchanger (3). The adjustment mechanism (2) is used to position the gas-liquid pipe (32) of the heat exchanger (3). The adjustment mechanism (2) can adjust the position of the gas-liquid pipe (32) in the three directions of X-axis, Y-axis and Z-axis so that the gas-liquid pipe (32) is aligned with the main body (31).

2. The positioning device according to claim 1, characterized in that, The adjustment mechanism (2) includes a first guide rail (21) extending along the X-axis and a first sliding member (22) slidably assembled on the first guide rail (21), and the gas-liquid pipe (32) is located on the first sliding member (22).

3. The positioning device according to claim 2, characterized in that, The first guide rail (21) has a plurality of first slots (4) arranged in sequence at intervals along the extension direction of the first guide rail (21). The first sliding member (22) has a first mounting hole. A first elastic member (23) and a first locking member (24) connected to the free end of the first elastic member (23) are installed in the first mounting hole. The first locking member (24) can engage with any of the first slots (4).

4. The positioning device according to claim 3, characterized in that, The first card (24) is a sphere, and the volume of the first card (24) in any of the first card slots (4) is less than or equal to half the volume of the first card (24).

5. The positioning device according to claim 2, characterized in that, The adjustment mechanism (2) further includes a second guide rail (25) extending along the Z-axis and a second sliding member (26) slidably assembled on the second guide rail (25), wherein the first guide rail (21) is fixed on the second sliding member (26).

6. The positioning device according to claim 5, characterized in that, The second guide rail (25) is provided with a plurality of second slots (5), and each second slot (5) is distributed sequentially at intervals along the extension direction of the second guide rail (25). The second sliding member (26) is provided with a second mounting hole, and a second elastic member and a second locking member connected to the free end of the second elastic member are installed in the second mounting hole. The second locking member can engage with any of the second slots (5).

7. The positioning device according to claim 6, characterized in that, The second card is a spherical body, and the volume of the second card in any of the second card slots (5) is less than or equal to half the volume of the second card.

8. The positioning device according to claim 5, characterized in that, The adjustment mechanism (2) further includes a third guide rail (27) extending along the Y-axis and a third slider (28) slidably assembled on the third guide rail (27), wherein the second guide rail (25) is fixed on the third slider (28).

9. The positioning device according to claim 8, characterized in that, The third guide rail (27) is provided with a plurality of third slots (6), and each third slot (6) is distributed sequentially at intervals along the extension direction of the third guide rail (27). The third sliding member (28) is provided with a third mounting hole, and a third elastic member and a third locking member connected to the free end of the third elastic member are installed in the third mounting hole. The third locking member can engage with any of the third slots (6).

10. The positioning device according to claim 9, characterized in that, The third card is a spherical body, and the volume of the third card in any of the third card slots (6) is less than or equal to half the volume of the third card.

11. The positioning device according to claim 1, characterized in that, The positioning mechanism (1) includes a first positioning component (11) and a second positioning component (12), and the main body (31) is held between the first positioning component (11) and the second positioning component (12).

12. The positioning device according to claim 11, characterized in that, The first positioning component (11) includes a first positioning plate (111) and a second positioning plate (112) assembled on one side of the first positioning plate (111). An angle is formed between the first positioning plate (111) and the second positioning plate (112). The main body (31) includes a first part (311) and a second part (312) inclined relative to the first part (311). The first part (311) is clamped between the first positioning plate (111) and the second positioning component (12). The second part (312) fits against the second positioning plate (112).

13. The positioning device according to claim 12, characterized in that, The position of the second positioning plate (112) relative to the first positioning plate (111) is adjustable.

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