A positioning device for installing a photovoltaic support

Abstract

This application discloses a positioning device for installing photovoltaic (PV) brackets, relating to the field of PV brackets. The positioning device includes a base, a support rod, a first screw, a support assembly, and a second screw. The base of this application has a connecting part that rotates with the mating hole of the pipe pile, which can realize the rotation adjustment of the positioning device. The height of the inclined beam and the entire PV bracket can be adjusted by the helical rotation of the first screw. The support shaft of the support assembly is threaded to the support body, and the angle of the inclined beam can be adjusted by the helical rotation of the support shaft. The second screw is threaded through the support rod, and the two ends of the second screw abut against two columns respectively. The horizontal positioning of the PV bracket is achieved by the helical rotation of the second screw. The positioning device of this application has the functions of positioning in terms of plane position, elevation, and angle, enabling the PV bracket to be quickly and accurately positioned during construction, which can significantly improve the installation speed and construction quality.

Description

Technical Field

[0001] This application relates to the field of photovoltaic mounting systems, and more particularly to a positioning device for installing photovoltaic mounting systems. Background Technology

[0002] like Figure 1 As shown, a photovoltaic support structure is the installation structure for photovoltaic modules. For example, a monopile double-clamp photovoltaic support structure generally includes inclined beams, front inclined braces, rear inclined braces, upper clamps, lower clamps, front columns, rear columns, and crossbeams.

[0003] During the installation of floating photovoltaic support structures, floating vessels are generally used as installation platforms. Common construction methods include: First, a component assembly method is adopted, using floating vessels to transport components and installing them sequentially, such as clamps, columns, crossarms, diagonal braces, and diagonal beams. This method results in a large number of components being piled up on the floating vessel, making the operation cumbersome and leading to low construction efficiency. Second, a pre-assembly and on-site installation method is adopted, where clamps, columns, crossarms, diagonal braces, and diagonal beams are pre-assembled on the shore. At this time, the bolts at the joints between the columns and clamps / crossarms are not tightened, but are only temporarily connected. Then, the floating vessel is used to transport them to the work site for installation, and then they are tightened.

[0004] In the second method above, the bracket needs to be manually lifted from the floating pontoon on the water surface to adjust its plane position, elevation and angle before the bolts can be tightened. This still presents certain operational difficulties and time-consuming issues. Utility Model Content

[0005] This application provides a positioning device for installing photovoltaic brackets, which can achieve fast and accurate positioning of photovoltaic brackets.

[0006] This application provides a positioning device for installing a photovoltaic bracket. The photovoltaic bracket includes a front column and a rear column of inclined beams. The positioning device includes a base, a support rod, a first screw, a support assembly, and a second screw.

[0007] The base is provided with a connecting part, and the pipe pile is provided with a mating hole. The connecting part is rotatably connected to the mating hole. One end of the support rod is vertically connected to the base, and the other end is provided with a first threaded hole. One end of the first screw is threaded to the first threaded hole, and the other end is threaded to the support assembly. The support assembly includes a support body and a support shaft threaded to the support body. The support body is threaded to the first screw, and the support shaft is used to support the inclined beam. The middle of the support rod is provided with a second threaded hole in the horizontal direction. The second screw is threaded to the second threaded hole. The two axial ends of the second screw are respectively configured as a first positioning end and a second positioning end. The first positioning end abuts against the front column, and the second positioning end abuts against the rear column.

[0008] Preferably, the pipe pile is provided with a pile top plate, the pile top plate is provided with a mating hole, and along the circumference of the mating hole, the pile top plate is provided with multiple connecting holes. The base is provided with an arc-shaped hole, and the connector passes through the arc-shaped hole and connects with the connecting hole.

[0009] Preferably, the connecting part includes a horizontal plate and a vertical plate, both of which are connected to the lower side of the base to form a cross-shaped structure.

[0010] Preferably, the support body includes an inclined plate, a connecting sleeve, and a transition sleeve connected sequentially along the height direction; a support shaft is provided on the inclined plate, the lower end of the connecting sleeve is sleeved on the outer periphery of the transition sleeve, and the transition sleeve is provided with a third threaded hole, which is threadedly connected to the first screw.

[0011] Preferably, the connecting sleeve is provided with a rectangular hole, and the upper cross-sectional shape of the transition sleeve is configured as rectangular, with the rectangular hole fitted onto the upper end of the transition sleeve.

[0012] Preferably, the inclined plate is inclined relative to the horizontal direction, the support shaft is perpendicularly connected to the inclined plate, and the inclined plate is provided with a fourth threaded hole that is threadedly connected to the support shaft.

[0013] Preferably, there are multiple support shafts, which are spaced apart along the plane of the inclined plate.

[0014] Preferably, the support assembly also includes a magnetic slope ruler, which is magnetically connected to the top of the support shaft.

[0015] Preferably, there are multiple second screws, which are spaced apart along the height direction.

[0016] Preferably, a synchronizing rod is provided between two adjacent second screws, a stepped shaft is provided on the second screw, and a rotating sleeve is provided at the end of the synchronizing rod. The rotating sleeve is coaxially sleeved on the stepped shaft to realize the rotational connection between the synchronizing rod and the second screw. The stepped shaft has two shoulder surfaces in the axial direction of the second screw to restrict the synchronizing rod from relative displacement with the second screw in the axial direction.

[0017] The positioning device of this application has at least the following beneficial effects:

[0018] The base of the positioning device in this application is provided with a connecting part that rotates with the mating hole of the pipe pile, which can realize the rotation adjustment of the positioning device. The upper end of the support rod is connected to the support component through a first screw. The height of the inclined beam and the entire photovoltaic bracket can be adjusted by the helical rotation of the first screw. The support shaft of the support component is threaded to the support body. The angle of the inclined beam can be adjusted by the helical rotation of the support shaft. The second screw is threaded through the support rod, and the two ends of the second screw abut against the two columns respectively. The horizontal positioning of the photovoltaic bracket can be achieved by the helical rotation of the second screw. The positioning device of this application has the functions of positioning plane position, elevation and angle, which can realize the rapid and accurate positioning of photovoltaic brackets during construction, and can significantly improve the installation speed and construction quality. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0020] Figure 1 This is a schematic diagram of a photovoltaic support system installed on a pipe pile;

[0021] Figure 2 This is a schematic diagram of the positioning device of this application;

[0022] Figure 3 This is a structural diagram of the base and the top plate of the pile;

[0023] Figure 4 This is an exploded view of the support components and struts;

[0024] Figure 5 It is a vertical cross-sectional view of the support components and struts;

[0025] Figure 6 This is a vertical cross-sectional view of the positioning device;

[0026] Figure 7 This is a schematic diagram illustrating the structure of the positioning device for the synchronizing rod;

[0027] Figure 8 yes Figure 7 An enlarged view of point A in the middle (showing perspective);

[0028] Figure 9 This is a schematic diagram showing the photovoltaic array marked on the top of the pipe pile;

[0029] Figure 10 This is a schematic diagram showing the deviation between the pipe pile and axis A, as well as the actual elevation.

[0030] Figure 11 This is a schematic diagram of the positioning principle of the positioning device;

[0031] Figure 12 This is a schematic diagram showing the positioning device after it has been installed on the pipe pile;

[0032] Figure 13 This is a schematic diagram illustrating the principle of the positioning device's positioning column;

[0033] Figure 14 This is a schematic diagram illustrating the principle of the positioning device's inclined beam.

[0034] The annotations in the attached figures are explained as follows:

[0035] 100. Positioning device;

[0036] 110. Base; 111. Connector; 120. Connecting part; 121. Horizontal plate; 122. Vertical plate; 130. Support rod; 140. First screw; 150. Support assembly; 151. Support body; 152. Support shaft; 153. Inclined plate; 154. Connecting sleeve; 155. Transition sleeve; 156. Magnetic slope gauge; 160. Second screw; 161. First positioning end; 162. Second positioning end; 163. Stepped shaft; 164. Shoulder surface; 170. Synchronizing rod; 171. Rotating sleeve;

[0037] 200. Photovoltaic support bracket; 210. Inclined beam; 220. Front diagonal brace; 230. Rear diagonal brace; 240. Upper clamp; 250. Lower clamp; 260. Front column; 270. Rear column; 280. Crossbeam;

[0038] 300. Pipe pile; 310. Pile top plate;

[0039] P1, mating hole; P2, first threaded hole; P3, second threaded hole; P4, connecting hole; P5, arc-shaped hole; P6, third threaded hole; P7, rectangular hole; P8, fourth threaded hole. Detailed Implementation

[0040] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0042] This embodiment discloses a positioning device for installing photovoltaic brackets, such as... Figure 1 As shown, the photovoltaic bracket 200 includes a diagonal beam 210, a front diagonal brace 220, a rear diagonal brace 230, an upper clamp 240, a lower clamp 250, a front column 260, a rear column 270, and a crossbeam 280. Before the photovoltaic bracket 200 is installed on the positioning device 100, the various structures of the photovoltaic bracket 200 are pre-assembled, but the bolts at each connection node are not tightened, and are only temporarily connected. The bolts are then tightened after the positioning device 100 adjusts and positions the various structures of the photovoltaic bracket 200.

[0043] like Figure 2 As shown, the positioning device 100 includes a base 110, a support rod 130, a first screw 140, a support assembly 150, and a second screw 160;

[0044] like Figure 3 As shown, the base 110 is circular in shape, and a connecting part 120 is provided on the lower surface of the base 110. The pipe pile 300 is provided with a mating hole P1. The connecting part 120 can be inserted downward into the mating hole P1 so that the base 110 can rotate relative to the pipe pile 300 but cannot move in the horizontal direction. In some preferred embodiments, the pipe pile 300 is provided with a pile top plate 310, and the pile top plate 310 has a mating hole P1 (circular hole) at its axial center. The connecting part 120 is inserted into the mating hole P1 coaxially downward. The pile top plate 310 is also provided with a plurality of connecting holes P4, which are spaced apart along the circumferential direction of the mating hole P1. The base 110 is provided with an arc-shaped hole P5, and the arc direction (i.e., the length direction) of the arc-shaped hole P5 is consistent with the circumferential direction of the mating hole P1. The connecting piece 111 (e.g., bolt) passes through the arc-shaped hole P5 and the connecting hole P4 from top to bottom and connects the base 110 and the pile top plate 310 together. In this embodiment, the arc-shaped hole P5 on the base 110 allows the base 110 to rotate around the height direction when the connecting piece 111 is released from the base 110, so as to realize the steering adjustment of the positioning device 100.

[0045] In this embodiment, the connecting portion 120 at the lower end of the base 110 can be a cylindrical structure, which is coaxially inserted into the mating hole P1 of the pile top plate 310, or, as... Figure 3 As shown, the connecting part 120 includes a horizontal plate 121 and a vertical plate 122. Both the horizontal plate 121 and the vertical plate 122 are connected to the lower surface of the base 110. The horizontal plate 121 and the vertical plate 122 are cross-connected to form a cross-shaped structure. This cross-shaped structure is inserted coaxially downward into the mating hole P1. In this embodiment, the design of the cross-shaped structure can reduce the overall weight, while the cross-shaped structure has good strength and can ensure stable mating with the pile top plate 310.

[0046] like Figure 4 As shown, the support rod 130 can be a steel pipe with a rectangular cross-section. The lower end of the support rod 130 is fixedly set on the upper surface of the base 110. The axial direction of the support rod 130 is vertical. The upper end of the support rod 130 is provided with a first threaded sleeve. The first threaded sleeve has a first threaded hole P2. The axial direction of the first threaded hole P2 is vertical.

[0047] like Figure 4 As shown, the lower end of the first screw 140 is threadedly connected to the first threaded hole P2, and the upper end of the first screw 140 is threadedly connected to the support assembly 150. By rotating the first screw 140, the height position of the support assembly 150 connected to the upper end of the first screw 140 can be adjusted.

[0048] like Figure 4 As shown, the support assembly 150 includes a support body 151 and a support shaft 152. The support body 151 is threadedly connected to the upper end of the first screw 140. The support shaft 152 is threaded onto the support body 151. The inclined beam 210 of the photovoltaic bracket 200 is supported by the support shaft 152. The support shaft 152 is threadedly connected to the support body 151. Therefore, the extension length of the support shaft 152 relative to the support body 151 can be adjusted by rotating the support shaft 152, thereby adjusting the support positioning angle of the inclined beam 210.

[0049] like Figure 4 and Figure 5As shown, in some preferred embodiments, the support body 151 includes an inclined plate 153, a connecting sleeve 154, and a transition sleeve 155 connected sequentially along the height direction. The inclined plate 153 is inclined relative to the horizontal plane, and the specific angle of inclination is designed according to actual needs. A fourth threaded hole P8 is provided on the inclined plate 153. One end of the support shaft 152 is threaded into the fourth threaded hole P8, and the axial direction of the support shaft 152 is perpendicular to the inclined plate 153. When the support shaft 152 rotates, the extension length of the support shaft 152 relative to the inclined plate 153 can be adjusted, thereby adjusting its support positioning angle on the inclined beam 210. The upper end of the connecting sleeve 154 is fixedly connected to the lower surface of the inclined plate 153, and the lower end of the connecting sleeve 154 is sleeved on the upper end of the transition sleeve 155. A third threaded sleeve is provided in the transition sleeve 155. The third threaded sleeve has a third threaded hole P6, which is threadedly connected to the first screw 140.

[0050] In this embodiment, the support body 151 is connected to the inclined plate 153 and the transition sleeve 155 respectively by the connecting sleeve 154, which is convenient for disassembly and transportation. The transition sleeve 155 is threadedly connected to the first screw 140, which is convenient to use.

[0051] In some preferred embodiments, such as Figure 5 As shown, a rectangular hole P7 is provided on the lower surface of the connecting sleeve 154. The horizontal cross-sectional shape of the rectangular hole P7 is rectangular, and the upper cross-sectional shape of the transition sleeve 155 is also rectangular. The rectangular hole P7 is fitted onto the upper end of the transition sleeve 155. The connecting sleeve 154 and the transition sleeve 155 are connected by the rectangular hole P7, which facilitates assembly and prevents circumferential rotation after they are fitted together.

[0052] In some preferred embodiments, such as Figure 5 As shown, there are multiple support shafts 152, which are spaced apart along the plane of the inclined plate 153, where the plane of the inclined plate 153 refers to the direction of inclination of the inclined plate 153. The multiple support shafts 152 can support and position the inclined beam 210 of the photovoltaic bracket 200 from multiple points, ensuring the correct angle and stability of the inclined beam 210.

[0053] In some preferred embodiments, such as Figure 5 As shown, the support assembly 150 also includes a magnetic slope gauge 156. The support shaft 152 is made of metal. The magnetic slope gauge 156 can be magnetically connected to the upper surface of the support shaft 152. The magnetic slope gauge 156 can detect the support angle of the support shaft 152 to ensure that the subsequent support angle of the inclined beam 210 is at the correct angle.

[0054] like Figure 6As shown, the second screw 160 is horizontally positioned, and the support rod 130 has a second threaded hole P3 in its middle. The second screw 160 is threaded into the second threaded hole P3, allowing it to be screwed in or out horizontally, thus adjusting its horizontal position. The axial ends of the second screw 160 are respectively configured as a first positioning end 161 and a second positioning end 162. The first positioning end 161 abuts against the front column 260, and the second positioning end 162 abuts against the rear column 270. Therefore, adjusting the second screw 160 facilitates positioning of the front and rear columns. In some preferred embodiments, both the first positioning end 161 and the second positioning end 162 are configured as circular end plates at the ends of the second screw 160, with the surface of the circular end plates abutting against the front column 260 or the rear column 270.

[0055] In some preferred embodiments, such as Figure 6 As shown, there are multiple second screws 160; this embodiment illustrates two. The two second screws 160 are spaced apart along the height direction on the support rod 130. The two second screws 160 can be engaged and positioned with the upper and lower positioning points of the column to ensure the verticality of the column.

[0056] like Figure 7 and Figure 8 As shown, a synchronizing rod 170 is provided between two adjacent second screws 160. The two ends of the synchronizing rod 170 are rotatably connected to the second screws 160 respectively, and the synchronizing rod 170 and the second screws 160 cannot have relative displacement in the axial direction of the second screws 160. Furthermore, a stepped shaft portion 163 is provided on the second screw 160. The outer diameter of the stepped shaft portion 163 is smaller than the outer diameter of other positions of the second screw 160. Rotating sleeves 171 are provided at both ends of the axial direction of the synchronizing rod 170. The rotating sleeves 171 are coaxially sleeved on the outer periphery of the stepped shaft portion 163, which can realize relative rotation between the rotating sleeves 171 and the stepped shaft portion 163. At the same time, in the axial direction of the second screw 160, the stepped shaft portion 163 has two shoulder surfaces 164. The rotating sleeves 171 are located between these two shoulder surfaces 164. The two shoulder surfaces 164 block the rotating sleeves 171, so that the rotating sleeves 171 and the synchronizing rod 170 cannot have axial displacement with the second screws 160.

[0057] In this embodiment, the synchronization rod 170 ensures that the two second screws 160 can move synchronously when adjusting their positions left and right, thus ensuring that the positioning points of the two second screws 160 remain consistent.

[0058] The working principle of the positioning device 100 in this embodiment is as follows:

[0059] 1. After the 300mm diameter pipe piles are constructed, surveying and layout work is carried out. The center line of the photovoltaic array's long axis (i.e., axis A) is marked on the end of the pipe piles. Figure 9 As shown, labels ① to ⑨ represent pipe piles ① to ⑨, respectively. Then, as... Figure 10 As shown, the deviation value 'a' between the actual center point of the re-measured pile location and axis A, and the deviation value 'b' between the actual elevation of the pipe pile surface and the design elevation, where b1 represents the design elevation;

[0060] 2. The method of pre-assembly and on-site installation is adopted. The clamps, columns, diagonal beams and diagonal braces are pre-assembled on the shore. At this time, the bolts at the joints between the columns and clamps are not tightened, and they are only temporarily connected. The crossbeam 280 will be assembled later.

[0061] III. Figure 11 As shown, the positioning device 100 of this embodiment is installed on the pipe pile 300, wherein the positioning principle is as follows: Figure 11 As shown, point Q represents the center point of the inclined beam; points C1 and C2 represent the contact points between the first second screw 160 and the front column 260 and the rear column 270, respectively; points B1 and B2 represent the contact points between the second second screw 160 and the front column and the rear column, respectively; points C1 and C2, as well as points B1 and B2, must be symmetrical about axis A; the height of point Q must meet the design requirements.

[0062] Therefore, it is necessary to adjust this positioning device so that each point is in the predetermined position. First, such as Figure 12 As shown, with the aid of a compass, the positioning device 100 is rotated in the direction of the positioning device 100 according to the principle of concentric circles, so that the second screw 160 of the positioning device 100 is perpendicular to the A axis. Furthermore, the base 110 and the pile top plate 310 are fixedly connected together by the connector 111.

[0063] IV. Figure 13 As shown, based on the deviation value 'a' between the actual center of the pipe pile and axis A, the second screw 160 of this positioning device is adjusted so that the first positioning ends 161 on both sides are positioned at point B1 or point C1, and the second positioning end 162 is positioned at point B2 or point C2. Points B1 and B2 are at the same height and symmetrical about axis A. Similarly, points C1 and C2 are at the same height and symmetrical about axis A.

[0064] V. For example Figure 14 As shown, according to the elevation deviation value b of the pipe pile 300, the first screw 140 is adjusted so that the elevation of the positioning device 100 is consistent with the elevation of the inclined beam 210 of the photovoltaic support 200. For example, if the elevation deviation of the pipe pile 300 is -2cm, it is adjusted to be 2cm higher.

[0065] 6. Place the magnetic slope gauge 156 on the support shaft 152 of the inclined plate 153 and check the top elevation and slope. If there are slight deviations in elevation and slope, they can be adjusted by rotating the support shaft 152.

[0066] 7. Remove the magnetic slope ruler 156, install the pre-assembled photovoltaic bracket onto the positioning device 100, and make the front column 260 and rear column 270 of the photovoltaic bracket 200 rest on the first positioning end 161 and the second positioning end 162 of the second screw 160 respectively. Further tighten the column and clamp bolts, and then install the crossbeam 280 to realize the installation of the photovoltaic bracket 200.

[0067] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A positioning device for installing a photovoltaic bracket, the photovoltaic bracket (200) comprising a diagonal beam (210), a front column (260), and a rear column (270), characterized in that, include: The base (110) is provided with a connecting part (120), and the pipe pile (300) is provided with a mating hole (P1). The connecting part (120) is rotatably connected to the mating hole (P1). The support rod (130) is vertically connected to the base (110) at one end and has a first threaded hole (P2) at the other end; The first screw (140) is threaded at one end to the first threaded hole (P2) and threaded at the other end to the support assembly (150); The support assembly (150) includes a support body (151) and a support shaft (152) threadedly connected to the support body (151). The support body (151) is threadedly connected to the first screw (140), and the support shaft (152) is used to support the inclined beam (210). The second screw (160) has a second threaded hole (P3) in the middle of the support rod (130) in the horizontal direction. The second screw (160) is threaded into the second threaded hole (P3). The two ends of the second screw (160) are respectively configured as a first positioning end (161) and a second positioning end (162). The first positioning end (161) abuts against the front column (260), and the second positioning end (162) abuts against the rear column (270).

2. The positioning device according to claim 1, characterized in that, The pipe pile (300) is provided with a pile top plate (310), the pile top plate (310) is provided with a mating hole (P1), and along the circumference of the mating hole (P1), the pile top plate (310) is provided with a plurality of connecting holes (P4), the base (110) is provided with an arc-shaped hole (P5), and the connector (111) passes through the arc-shaped hole (P5) and is connected to the connecting hole (P4).

3. The positioning device according to claim 2, characterized in that, The connecting part (120) includes a horizontal plate (121) and a vertical plate (122), both of which are connected to the lower side of the base (110) to form a cross-shaped structure.

4. The positioning device according to any one of claims 1 to 3, characterized in that, The support body (151) includes an inclined plate (153), a connecting sleeve (154), and a transition sleeve (155) connected sequentially along the height direction; a support shaft (152) is provided on the inclined plate (153), the lower end of the connecting sleeve (154) is sleeved on the outer periphery of the transition sleeve (155), and the transition sleeve (155) is provided with a third threaded hole (P6), which is threadedly connected to the first screw (140).

5. The positioning device according to claim 4, characterized in that, The connecting sleeve (154) is provided with a rectangular hole (P7), and the upper cross-sectional shape of the transition sleeve (155) is configured as rectangular, with the rectangular hole (P7) fitted onto the upper end of the transition sleeve (155).

6. The positioning device according to claim 4, characterized in that, The inclined plate (153) is inclined relative to the horizontal direction, the support shaft (152) is vertically connected to the inclined plate (153), and the inclined plate (153) is provided with a fourth threaded hole (P8) that is threadedly connected to the support shaft (152).

7. The positioning device according to claim 6, characterized in that, There are multiple support shafts (152), and the multiple support shafts (152) are spaced apart along the plane direction of the inclined plate (153).

8. The positioning device according to claim 6 or 7, characterized in that, The support assembly (150) also includes a magnetic slope gauge (156), which is magnetically connected to the top of the support shaft (152).

9. The positioning device according to claim 1, characterized in that, There are multiple second screws (160), and the multiple second screws (160) are spaced apart along the height direction.

10. The positioning device according to claim 9, characterized in that, A synchronizing rod (170) is provided between two adjacent second screws (160). A stepped shaft portion (163) is provided on the second screw (160). A rotating sleeve (171) is provided at the end of the synchronizing rod (170). The rotating sleeve (171) is coaxially sleeved on the stepped shaft portion (163) to realize the rotational connection between the synchronizing rod (170) and the second screw (160). The stepped shaft portion (163) has two shoulder surfaces (164) on the axial direction of the second screw (160) to restrict the synchronizing rod (170) from relative displacement with the second screw (160) in the axial direction.

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