Laser tracker

Abstract

According to the laser tracker provided by the invention, the supporting part is arranged below the body part of the laser tracker, and the body part is elevated by using the supporting part, so that the laser tracker is prevented from being shielded in the use process, and the accuracy of a surveying and mapping result is improved; and the supporting rods of the supporting part are provided with locking gears, and the supporting rods are folded and locked, so that the size of the laser tracker in the transportation process is reduced, the supporting rods are prevented from shaking, and the laser tracker is convenient to transport.

Description

Technical Field

[0001] The present application relates to the field of laser surveying and mapping technology, and in particular to a laser tracker. Background Art

[0002] Laser trackers are mainly used for precise measurement of three-dimensional coordinates in large-scale spaces of hundreds of meters. They play an important role in tooling setup, inspection, and machine tool control and calibration in the automotive, aerospace, and general manufacturing fields. In actual applications, the laser tracker needs to be installed and fixed on the measuring point fixture. Since the fixed support part of the laser tracker is large, the laser tracker is installed on top and the overall center of gravity is high. Therefore, when carrying it, the main part of the laser tracker needs to be removed from the fixture and stored separately, which makes the overall disassembly and assembly time-consuming and laborious. Summary of the invention

[0003] In view of this, the purpose of the present application is to propose a laser tracker, characterized in that the laser tracker includes a support portion and a main body portion. The support portion includes at least three support rods and a support platform, the support rods are evenly distributed along the outer circumference of the support platform, and are rotatably connected to the support platform through a rotating shaft. In the height direction, the support platform and the main body portion are detachably connected. Among them, the support rod includes a locking gear and at least one supporting gear, and the support rod switches between the locking gear and the supporting gear by rotating the rotating shaft.

[0004] In some embodiments, the main body includes a tracker body and at least three locking pins, the support rod further includes a locking slot on the side away from the rotating shaft, and the locking pin, the tracker body, the bracket platform and the support rod are arranged in sequence along the height direction. When the support rod is in the locking position, the locking pin is inserted into the locking slot to fix the support rod.

[0005] In some embodiments, the main body also includes a ratchet drive mechanism, including a ratchet, a pawl and at least three drive rods. The first end of the drive rod is rotatably connected to the ratchet, and the second end of the drive rod is rotatably connected to the locking pin. The pawl is used to limit the rotation direction of the ratchet, and the rotation of the ratchet in a preset direction drives the first end of the drive rod to rotate, and the second end of the drive rod drives the locking pin to move along the extension direction of the locking pin.

[0006] In some embodiments, the main body also includes a connecting tool, and a groove matching the tracker body is provided at the first end of the connecting tool for mounting the tracker body. A buckle structure is provided at the second end of the connecting tool, and a mounting groove matching the buckle structure is provided on the side of the bracket platform close to the main body, and the connecting tool is fixed to the mounting groove through the buckle structure.

[0007] In some embodiments, the snap-fit ​​structure includes at least two snap-fit ​​pins, and the snap-fit ​​pins are arranged on the outer peripheral surface of the second end of the connecting tool. The mounting slot includes a first slot plate and a second slot plate, and the first slot plate and the second slot plate are arranged in sequence in the height direction. The first slot plate, the second slot plate and the end surface of the second end of the connecting tool match the shape, and include snap-fit ​​slots corresponding to the number of snap-fit ​​pins. The mounting slot also includes a locking mode and a release mode. When the mounting slot is in the release mode, in the height direction, the projections of the first slot plate and the second slot plate overlap, which is used to align the snap-fit ​​pin with the snap-fit ​​slot and make the upper end surface of the snap-fit ​​pin lower than the lower end surface of the first slot plate. When the mounting slot is in the locking mode, in the height direction, the projections of the first slot plate and the second slot plate do not overlap, and the upper end surface of the snap-fit ​​structure abuts against the lower end surface of the first slot plate.

[0008] In some embodiments, there are four support rods, and the support platform also includes four arc-shaped slide grooves and four arc-shaped slide rails. The arc-shaped slide rails are slidably arranged in the arc-shaped slide grooves, the fixed end of the rotating shaft is fixedly connected to the arc-shaped slide rails, and the movable end of the rotating shaft is fixedly connected to the support rods.

[0009] In some embodiments, the arcuate slide rail further includes a locking assembly, which is used to abut against the arcuate slide groove, and the position of the locking assembly relative to the arcuate slide groove in the height direction is adjustable.

[0010] In some embodiments, the support rod further comprises a limiting hole, a limiting plate and a limiting latch. The limiting plate is provided with at least two limiting slots, and the limiting latch passes through the limiting hole and one limiting slot to limit the movement of the support rod around the rotating shaft.

[0011] In some embodiments, the support rod also includes an inner rod and a hollow rod. The outer side of the inner rod includes an external thread, and the inner side of the hollow rod includes an internal thread matching the external thread. The inner rod is threadably connected to the internal thread of the hollow rod via the external thread, and the position of the inner rod relative to the hollow rod along the extension direction of the hollow rod is adjustable.

[0012] In some embodiments, the support portion further includes a ground claw, which is disposed on a side of the support rod away from the rotating shaft and is rotationally connected to the support rod via a ball head.

[0013] From the above description, it can be seen that the laser tracker provided in the present application, by providing a support portion under the main body of the laser tracker, and using the support portion to elevate the main body, thereby preventing the laser tracker from being blocked during use and improving the accuracy of the surveying and mapping results; and a locking position is provided for the support rod of the support portion, and the support rod is folded and locked to reduce the volume of the laser tracker during transportation, and prevent the support rod from shaking, so that the laser tracker is easy to transport. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 A schematic diagram of the structure of a laser tracker provided in an embodiment of the present application in a support position;

[0016] Figure 2 A schematic diagram of the structure of a laser tracker in a locked position provided in an embodiment of the present application;

[0017] Figure 3 A partial schematic diagram of a limiting structure of a laser tracker provided in an embodiment of the present application;

[0018] Figure 4 A partial schematic diagram of a ratchet drive mechanism of a laser tracker provided in an embodiment of the present application;

[0019] Figure 5 A schematic diagram of the structure of a laser tracker provided in an embodiment of the present application from another perspective;

[0020] Figure 6 A partial schematic diagram of an arc-shaped slideway of a laser tracker provided in an embodiment of the present application;

[0021] Figure 7 A schematic diagram of the structure of a laser tracker body provided in an embodiment of the present application;

[0022] Figure 8 A schematic structural diagram of a laser tracker support platform provided in an embodiment of the present application.

[0023] Figure markings: 10-support part; 11-support rod; 111-locking slot; 112-limiting hole; 113-limiting plate; 114-limiting pin; 115-limiting slot; 116-inner rod; 117-hollow rod; 118-ground claw; 12-support platform; 121-installation slot; 1211-first slot plate; 1212-second slot plate; 1213-card slot; 122-arc slide groove; 123-arc slide rail; 1231-locking assembly; 13-rotating shaft; 131-fixed end; 132-movable end; 20-main body; 21-tracker body; 22-locking pin; 23-ratchet drive mechanism; 231-ratchet; 232-ratchet; 233-driving rod; 24-connecting tooling; 241-buckle structure; 2411-card pin. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0025] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] like Figure 1 As shown, the present application provides a laser tracker, including a support portion 10 and a main body portion 20 .

[0027] The support portion 10 includes at least three support rods 11 and a support platform 12. The support rods 11 are evenly distributed along the outer circumference of the support platform 12 and are rotatably connected to the support platform 12 through a rotating shaft 13. In the height direction, the support platform 12 is detachably connected to the main body 20. Among them, the support rod 11 includes a locking gear and at least one supporting gear. The support rod 11 switches between the locking gear and the supporting gear by rotating the rotating shaft 13.

[0028] In this embodiment, the support portion 10 is used to elevate the main body 20 of the laser tracker, thereby preventing the laser tracker from being blocked during surveying and mapping, and making the surveying and mapping results of the laser tracker more accurate.

[0029] The support rod 11 is used to elevate the support platform, and the inclination angle of the single support rod 11 can be adjusted through the rotating shaft 13 so that it can be used on uneven ground. Specifically, the laser tracker can be leveled by adjusting the inclination angle of the support rod 11.

[0030] The supporting position of the support rod 11 is used to support the main body 20 , and the locking position is used to fold and fix the support rod 11 , thereby preventing the support rod 11 from shaking during transportation of the laser tracker.

[0031] As an optional embodiment, the support rod 11 is preferably an extendable telescopic rod, wherein the telescopic rod can be extended or retracted in any manner. For example, it can be a sleeve with multiple matching diameters, the length of which can be adjusted by extension and retraction and fixed by friction; a threaded rod, which is assembled with an inner rod 116 having an external thread matching the internal thread and arranged inside the inner threaded tube through an internal threaded tube, and the length is adjusted by threads; multiple short rods can also be connected by hinges and the short rods can be folded to achieve length adjustment of the telescopic rod.

[0032] The support platform 12 is used to connect the support rod 11 and the main body 20 .

[0033] As an optional implementation, in order to achieve leveling of the laser tracker, the support platform 12 may further include at least one spirit level. In actual use, the support platform 12 may be leveled by the spirit level, thereby achieving leveling of the main body 20 .

[0034] As an optional embodiment, the support platform 12 may also include a rotating platform, which is used to drive the main body 20 to rotate, and the rotating platform can be locked after the main body 20 rotates to a certain angle, thereby realizing the adjustment of the facing angle of the main body 20. After the support platform 12 is leveled by the support rod 11, the main body 20 can be driven to rotate by the rotating platform, thereby realizing laser mapping of multiple angles.

[0035] In some embodiments, Figure 2 As shown, the main body 20 includes a tracker body 21 and at least three locking pins 22, and the support rod 11 further includes a locking slot 111 on the side away from the rotating shaft 13. The locking pin 22, the tracker body 21, the bracket platform 12 and the support rod 11 are arranged in sequence along the height direction.

[0036] When the support rod 11 is in the locking position, the locking pin 22 is inserted into the locking slot 111 to fix the support rod 11 .

[0037] In this embodiment, by arranging the locking pin 22 above the tracker body 21, the support leg can be directly locked on the side away from the rotating shaft 13 when the support leg is in the locked state. During transportation, by fixing multiple support legs on the outside of the tracker body 21, foreign objects are prevented from hitting the tracker body 21.

[0038] As a preferred embodiment, the support platform 12 further includes a rebound device, which is used to limit the end of the support leg away from the rotation shaft 13 from rotating around the rotation shaft 13 in a direction away from the tracker body 21. The support leg is limited to rotate in a direction toward the tracker body 21 by the locking pin 22, and is limited to rotate in a direction away from the tracker body 21 by the rebound device, thereby fixing the relative position of the support leg and the tracker body 21 to prevent the support leg from swinging during transportation.

[0039] In some embodiments, Figure 4 As shown, the main body 20 further includes a ratchet drive mechanism 23 , including a ratchet 231 , a pawl 232 and at least three drive rods 233 .

[0040] A first end of the driving rod 233 is rotatably connected to the ratchet 231 , and a second end of the driving rod 233 is rotatably connected to the locking latch 22 .

[0041] The pawl 232 is used to limit the rotation direction of the ratchet 231. The ratchet 231 rotates along a preset direction to drive the first end of the driving rod 233 to rotate, and the second end of the driving rod 233 drives the locking pin 22 to move along the extension direction of the locking pin 22.

[0042] In this embodiment, the ratchet 231 mechanism is provided to limit the movement of the locking pin 22, thereby preventing the locking pin 22 from being displaced during transportation and preventing the main body 20 from being damaged.

[0043] In some embodiments, Figure 7 As shown, the main body 20 further includes a connecting fixture 24 , and a first end of the connecting fixture 24 is provided with a groove matching the tracker body 21 for installing the tracker body 21 .

[0044] A buckle structure 241 is disposed at the second end of the connecting tool 24 , and a mounting groove 121 matching the buckle structure 241 is disposed on one side of the bracket platform 12 close to the main body 20 , and the connecting tool 24 is fixed to the mounting groove 121 via the buckle structure 241 .

[0045] In this embodiment, by designing connection fixtures 24 of different sizes, shapes and dimensions, and installing the laser tracker module on the connection fixture 24, it is possible to adapt to different types and / or models of laser tracker modules on the market. By providing a buckle structure 241 on the second section of the connection fixture 24, the main body 20 can be quickly disassembled and assembled, making it easy to remove and read the data obtained in the laser tracker.

[0046] In some embodiments, Figure 7 and Figure 8As shown, the buckle structure 241 includes at least two snap-in pins 2411 , and the snap-in pins 2411 are disposed on the outer circumferential surface of the second end of the connecting tool 24 .

[0047] The mounting slot 121 includes a first slot plate 1211 and a second slot plate 1212 , and the first slot plate 1211 and the second slot plate 1212 are sequentially arranged in the height direction.

[0048] The first slot plate 1211 and the second slot plate 1212 match the shape of the second end surface of the connecting tool 24 , and include a number of card slots 1213 corresponding to the number of the card pins 2411 .

[0049] The mounting slot 121 also includes a locking mode and a releasing mode.

[0050] When the mounting slot 121 is in the release mode, in the height direction, the projections of the first slot plate 1211 and the second slot plate 1212 coincide with each other, so as to align the card pin 2411 with the card slot 1213 and make the upper end surface of the card pin 2411 lower than the lower end surface of the first slot plate 1211.

[0051] When the mounting slot 121 is in the locking mode, in the height direction, the projections of the first slot plate 1211 and the second slot plate 1212 do not overlap, and the upper end surface of the buckle structure 241 abuts against the lower end surface of the first slot plate 1211 .

[0052] In this embodiment, at least two snap-in pins 2411 are provided to match the first slot plate 1211 and the second slot plate 1212 of the installation slot 121, and the snap-in structure 241 is locked by rotating the first slot plate 1211, thereby realizing the rapid disassembly and assembly of the main body 20 and the support part 10. When switching from the release mode to the locking mode, the rotation angle of the first slot plate 1211 is preferably between 15° and 30°.

[0053] In some embodiments, Figure 5 and Figure 6 As shown, there are four support rods 11, and the support platform 12 also includes four arc-shaped slide grooves 122 and four arc-shaped slide rails 123. The arc-shaped slide rails 123 are slidably arranged in the arc-shaped slide grooves 122, the fixed end 131 of the rotating shaft 13 is fixedly connected to the arc-shaped slide rails 123, and the movable end 132 of the rotating shaft 13 is fixedly connected to the support rod 11.

[0054] In this embodiment, the position of the support rod 11 is adjustable by providing the arc-shaped slide groove 122 and the arc-shaped slide rail 123, so that the laser tracker can be fixed in complex terrain. Since the adjustable angle of the support rod 11 is small when adjusting the angle of the three support rods 11, the number of the support rods 11 is preferably four.

[0055] In some embodiments, Figure 6As shown, the arc-shaped slide rail 123 further includes a locking component 1231 , which is used to abut against the arc-shaped slide groove 122 , and the position of the locking component 1231 relative to the arc-shaped slide groove 122 in the height direction is adjustable.

[0056] In this embodiment, a locking assembly 1231 is provided to fix the arc-shaped slide rail 123 and the arc-shaped slide groove 122 after the angle is adjusted, thereby preventing the laser tracker from shaking during the surveying and mapping process.

[0057] In some embodiments, Figure 3 As shown, the support rod 11 further includes a limiting hole 112 , a limiting plate 113 and a limiting latch 114 .

[0058] At least two limiting grooves 115 are formed on the limiting plate 113 . The limiting pin 114 passes through the limiting hole 112 and one limiting groove 115 to limit the support rod 11 from moving around the rotating shaft 13 .

[0059] In this embodiment, a limiting mechanism is provided so that the support rod 11 can be supported at a fixed angle during use. As a preferred embodiment, the limiting latch 114 may also include a spring, and the spring provides a force for the limiting latch 114 in the direction of the limiting disk 113. During use, the operator can lift the limiting latch 114 and rotate the support rod 11 to rotate the limiting latch 114 to the top of the corresponding limiting groove 115. At this time, the limiting latch 114 is released, and the limiting latch 114 falls into the limiting groove 115 under the action of the spring elastic force. In the subsequent use process, due to the limitation of the spring elastic force, the limiting latch 114 is difficult to be separated from the limiting groove 115 due to external force vibration, thereby preventing the support rod 11 from rotating after moving.

[0060] In some embodiments, Figure 2 As shown, the support rod 11 also includes an inner rod 116 and a hollow rod 117. The outer side of the inner rod 116 includes an external thread, and the inner side of the hollow rod 117 includes an internal thread matching the external thread. The inner rod 116 is threadedly connected to the internal thread of the hollow rod 117 via the external thread, and the position of the inner rod 116 relative to the hollow rod 117 along the extension direction of the hollow rod 117 is adjustable.

[0061] In this embodiment, the length of the support rod 11 is adjustable by providing an inner rod 116 and a hollow rod 117, and threading the inner rod 116 and the hollow rod 117. Since the scene environment for surveying and mapping using a laser tracker is complex, the inner rod 116 and the hollow rod 117 are threadedly connected to prevent dust from entering between the inner rod 116 and the hollow rod 117, thereby improving the reliability of the laser tracker. In addition, since the laser tracker module has a large mass, the laser tracker can be supported by a support rod 11 with a smaller diameter through threaded connection, thereby reducing the overall mass of the laser tracker.

[0062] In some embodiments, Figure 2 As shown, the support portion 10 further includes a ground claw 118 , which is disposed on a side of the support rod 11 away from the rotation axis 13 and is rotatably connected to the support rod 11 via a ball head.

[0063] In this embodiment, by providing a ground claw 118 and connecting the ground claw 118 to the support rod 11 through a ball head, the contact area between the support rod 11 and the ground is increased, thereby preventing the laser tracker from shaking during use. The material of the ground claw 118 is not limited and can be selected or replaced according to the actual surveying and mapping scenario. For example, it can be one of a rubber soft foot, a metal nail, and a multi-head metal claw.

[0064] It can be seen from the above embodiments of the present application that the present application provides a support portion under the main body of the laser tracker and uses the support portion to elevate the main body, thereby preventing the laser tracker from being blocked during use and improving the accuracy of the surveying and mapping results; and a locking position is provided for the support rod of the support portion, and the support rod is folded and locked to reduce the volume of the laser tracker during transportation, and prevent the support rod from shaking, so that the laser tracker is easy to transport.

[0065] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0066] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0067] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0068] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A laser tracker, characterized in that: The laser tracker comprises a support portion and a main body portion; The support part includes at least three support rods and a support platform, the support rods are evenly distributed along the outer circumference of the support platform, and are rotatably connected to the support platform through a rotating shaft; along the height direction, the support platform is detachably connected to the main body; wherein, the support rod includes a locking gear and at least one supporting gear, and the support rod switches between the locking gear and the supporting gear by rotating the rotating shaft.

2. The laser tracker according to claim 1, characterized in that: The main body includes a tracker body and at least three locking pins, the support rod further includes a locking slot on a side away from the rotating shaft, and the locking pin, the tracker body, the bracket platform and the support rod are arranged in sequence along the height direction; When the support rod is in the locking position, the locking pin is inserted into the locking slot to fix the support rod.

3. The laser tracker according to claim 2, characterized in that: The main body also includes a ratchet drive mechanism, including a ratchet, a pawl and at least three drive rods; The first end of the driving rod is rotatably connected to the ratchet wheel, and the second end of the driving rod is rotatably connected to the locking latch; The pawl is used to limit the rotation direction of the ratchet wheel. The ratchet wheel rotates along a preset direction to drive the first end of the driving rod to rotate, and the second end of the driving rod drives the locking pin to move along the extension direction of the locking pin.

4. The laser tracker according to claim 1, characterized in that: The main body also includes a connecting tool, and a first end of the connecting tool is provided with a groove matching the tracker body, for installing the tracker body; A buckle structure is provided at the second end of the connecting tool, and a mounting groove matching the buckle structure is provided on one side of the bracket platform close to the main body, and the connecting tool is fixed to the mounting groove through the buckle structure.

5. The laser tracker according to claim 4, characterized in that: The buckle structure includes at least two snap-in pins, and the snap-in pins are arranged on the outer peripheral surface of the second end of the connecting tool; The mounting slot includes a first slot plate and a second slot plate, and the first slot plate and the second slot plate are arranged in sequence in the height direction; The first slot plate and the second slot plate match the shape of the second end surface of the connecting tool, and include a number of card slots corresponding to the number of the card pins; The mounting slot also includes a locking mode and a release mode; When the mounting slot is in the release mode, in the height direction, the projections of the first slot plate and the second slot plate overlap, so as to align the card pin with the card slot and make the upper end surface of the card pin lower than the lower end surface of the first slot plate; When the mounting slot is in the locking mode, in the height direction, the projections of the first slot plate and the second slot plate do not overlap, and the upper end surface of the buckle structure abuts against the lower end surface of the first slot plate.

6. The laser tracker according to claim 1, characterized in that: There are four support rods, and the support platform also includes four arc-shaped slide grooves and four arc-shaped slide rails. The arc-shaped slide rails are slidably arranged in the arc-shaped slide grooves, the fixed end of the rotating shaft is fixedly connected to the arc-shaped slide rails, and the movable end of the rotating shaft is fixedly connected to the support rods.

7. The laser tracker according to claim 6, characterized in that: The arc-shaped slide rail further includes a locking component, which is used to abut against the arc-shaped slide groove, and the position of the locking component relative to the arc-shaped slide groove in the height direction is adjustable.

8. The laser tracker according to claim 1, characterized in that: The support rod also includes a limiting hole, a limiting plate and a limiting latch; At least two limiting grooves are formed on the limiting plate, and the limiting pin passes through the limiting hole and one of the limiting grooves to limit the movement of the support rod around the rotating shaft.

9. The laser tracker according to claim 1, characterized in that: The support rod also includes an inner rod and a hollow rod. The outer side of the inner rod includes an external thread, and the inner side of the hollow rod includes an internal thread matching the external thread. The inner rod is threadably connected to the internal thread of the hollow rod via the external thread, and the position of the inner rod relative to the hollow rod along the extension direction of the hollow rod is adjustable.

10. The laser tracker according to claim 1, characterized in that: The support portion further comprises a ground claw, which is arranged on a side of the support rod away from the rotating shaft and is rotatably connected to the support rod via a ball head.

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