A retractable structure and fixing device

Abstract

The application discloses a winding and unwinding structure and fixing device, relates to the technical field of equipment maintenance in the electric power industry, and comprises the winding and unwinding structure, a rotating part, a rotating wheel, a supporting shaft arranged through the outer wall of the rotating wheel, a motor arranged at one end of the supporting shaft and a contact block arranged on the outer wall of the rotating wheel. The winding and unwinding structure and fixing device have the beneficial effects that the winding and unwinding process of the insulating net does not need 3-5 workers to participate, the whole device can be locked and placed in the winding and unwinding state at any time, the stability is high, and the reliability is high.

Description

Technical Field

[0001] This invention relates to the field of equipment maintenance technology in the power industry, and in particular to a retractable structure and fixing device. Background Technology

[0002] As China Southern Power Grid Company continues to accelerate the digital transformation of its power grid, it has placed higher demands on the reliability of power supply. This has led to the proposal of power reliability requirements such as "power lines can be shut down, but customers will not be without power" and "establishing uninterrupted power supply demonstration zones."

[0003] To ensure the replacement of corroded conductors and ground wires on high-voltage lines without power outages on medium and low-voltage lines, the current method involves maintenance personnel laying an insulating cross-line while straddling the lines. This ensures the power lines beneath 35kV and above remain energized while safely replacing corroded overhead conductors and ground wires. However, this method presents several problems: 1. High risk: Inadequate protection measures or significant defects such as broken strands in the conductors can easily cause maintenance personnel to fall. 2. High skill level required for laying the insulating net, necessitating a large number of personnel (at least 3-5) to climb the towers, resulting in low efficiency. 3. Overly cumbersome process requiring multiple people to work together. Therefore, a robot needs to be developed to replace manual labor. The challenge lies in ensuring the insulating net can withstand the impact of a fallen ground wire and that the robot's insulating net remains stable. Summary of the Invention

[0004] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0005] In view of the problems existing in the above or prior art, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a retractable structure that can solve the problems of high risk and low efficiency when maintenance personnel lay insulating nets.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a retractable structure, comprising a rotating component including a rotating wheel, a support shaft passing through the outer wall of the rotating wheel, a motor disposed at one end of the support shaft, and an abutment block disposed on the outer wall of the rotating wheel; and a locking component including a base plate connected to one end of the motor, a servo motor disposed on the outer wall of the base plate, a metal disk disposed at one end of the servo motor, a gear disposed at one end of the metal disk, a rack meshing with the gear, and an abutment post disposed at one end of the rack.

[0008] In a preferred embodiment of the retractable structure of the present invention, the rotating wheel is composed of a central shaft and rotating wheel pieces disposed at both ends of the central shaft, and the support shaft passes through one end of the central shaft that is not curved.

[0009] In a preferred embodiment of the retractable structure of the present invention, one end of the support shaft is rotatably connected to the motor, and the abutment block is disposed on the outer wall of the rotating wheel near the motor end, with at least one abutment block disposed on the outer wall of the rotating wheel.

[0010] In a preferred embodiment of the retractable structure of the present invention, the servo motor is fixedly connected to the base plate, and two servo motors are provided on the outer wall of the base plate, with the strokes of the two servo motors synchronized.

[0011] In a preferred embodiment of the retractable structure of the present invention, the abutting post is fixedly connected to the end of the rack away from the servo motor, and the rack reciprocates under meshing connection with the gear.

[0012] In a preferred embodiment of the retractable structure of the present invention, when the abutting post is fed to the furthest distance from the servo motor by the rack, the abutting post can abut against the abutting block to prevent the rotating wheel from rotating.

[0013] In a preferred embodiment of the retractable structure of the present invention, the servo motors are located on both sides of the motor without a connecting support shaft, and the ends of the servo motors connected to the metal discs are close to each other.

[0014] In a preferred embodiment of the retractable structure of the present invention, a first through groove is provided on the base plate.

[0015] The beneficial effects of the retraction and extension structure of the present invention are as follows: under the drive of the motor providing greater power, an effective power source is provided for the retraction and extension of the insulating net. At the same time, the locking component can keep the entire device in a locked and retracted state at all times, eliminating the need for 3 to 5 workers to operate together and improving work efficiency.

[0016] Another objective of this invention is to provide a fixing device that addresses the problems of high impact force on the insulating mesh and low stability of the insulating mesh when the ground wire falls.

[0017] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a fixing device, which includes a retractable structure; and a guide rail, a shaft support seat disposed on the outer wall of the guide rail, the shaft support seat being penetrated by a support shaft, a positioning seat disposed on the outer wall of the shaft support seat, a first fixing plate disposed between the outer wall of the base plate and the servo motor, a second fixing plate disposed on the outer wall of the base plate and connected to the rack, and a first bracket disposed between the base plate and the motor.

[0018] As a preferred embodiment of the fixing device of the present invention, the shaft support seats are provided on two sides of the rotating wheel away from the intermediate shaft, the positioning seats can be passed through by the rack and the abutment post, the number of positioning seats is the same as the number of racks, the first fixing plate is fixedly connected to the base plate and the servo motor, the second fixing plate is fixedly connected to the base plate, the second fixing plate is slidably connected to the rack, and the first bracket is fixedly connected to the base plate and the motor.

[0019] The beneficial effects of the fixing device of the present invention are: when the fixing device fixes the retraction structure, it can greatly increase the ability of the insulating mesh to withstand the impact force when the ground wire falls, and the insulating mesh wire can be kept stable. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a three-dimensional schematic diagram of the overall retractable structure and fixing device. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0025] Example 1

[0026] Reference Figure 1This is the first embodiment of the present invention, which provides a retractable structure, including a rotating member 100, comprising a rotating wheel 101, a support shaft 102 extending through the outer wall of the rotating wheel 101, a motor 103 disposed at one end of the support shaft 102, and an abutment block 101a disposed on the outer wall of the rotating wheel 101; and a locking member 200, comprising a base plate 201 connected to one end of the motor 103, a servo motor 202 disposed on the outer wall of the base plate 201, a metal disk 203 disposed at one end of the servo motor 202, a gear 204 disposed at one end of the metal disk 203, a rack 205 meshing with the gear 204, and an abutment post 206 disposed at one end of the rack 205.

[0027] The rotating wheel 101 is the component that directly contacts the insulating mesh in the winding and unwinding structure. The insulating mesh is wound and unwound when the rotating wheel 101 rotates in different directions. One end of the insulating mesh is fixed to the rotating wheel 101. The support shaft 102 passes through the rotating wheel 101. It should be noted that the rotating wheel 101 can be a pulley or a winding wheel. This design uses a winding wheel. It should be noted that the winding wheel in this design consists of two discs with through grooves on their outer walls and an intermediate shaft with a diameter larger than the support shaft 102. The two discs are respectively located at the two ends of the non-arc surface of the intermediate shaft. The support shaft 102 passes through the center of the discs. 2. Fixedly connected to the rotating wheel 101, the support shaft 102 can drive the rotating wheel 101 to rotate when it rotates. The motor 103 is a worm gear motor, which has a built-in locking function. The motor 103 is rotatably connected to the support shaft 102, and the rotation of the motor 103 drives the support shaft 102 to rotate. The abutment block 101a is set on the outer wall of the disc that makes up the rotating wheel 101 at a position where there is no through groove and the support shaft 102 does not penetrate. The function of the base plate 201 is to fix the locking part 200 and define the range of the rotating part 100. Without the base plate 201, the retractable structure cannot function properly without a fixed point. Yes, the servo motor 202 is fixedly connected to the base plate 201. This connection can be achieved by using the servo motor 202's built-in positioning holes to directly fix it to the base plate 201 with bolts, or by setting an intermediate fixing seat between the servo motor 202 and the base plate 201, fixing the servo motor 202 to the intermediate fixing seat, and then fixing the intermediate fixing seat to the base plate 201. The metal disk 203 is rotatably connected to the servo motor 202. The metal disk 203 can be circular, triangular, square, or other shapes; this design uses a circular metal disk 203. The metal disk 203 has several small holes arranged in a circular array. The connection between the metal disk 203 and the servo motor 202 can be achieved by using the center of the disk... The metal disc 203 is directly connected to the output shaft of the servo motor 202 or has an intermediate connecting component inside the small hole of the metal disc 203. When the metal disc 203 is driven to rotate by the servo motor 202, it drives the gear 204 on the same shaft as the metal disc 203 to rotate. The feed direction of the rack 205 when it is meshed with the gear 204 is perpendicular to the non-arc outer wall of the disc of the rotating wheel 101. The abutment post 206 is fixedly connected to the rack 205. When the rack 205 is fed to the maximum rotation angle of the servo motor 202, the abutment post 206 will contact the abutment block 101a and prevent the rotating wheel 101 from continuing to rotate as the rotating wheel 101 continues to rotate.

[0028] In use, after the high-voltage line is placed on the retractable structure, the motor 103 rotates, driving the rotating wheel 101 to rotate and retract the line. Relying on the large torque of the motor 103, the insulating net is pulled from the ground to a suitable position in the air. The motor 103 stops, keeping the insulating net in the air position unchanged. When the servo motor 202 rotates, it drives the metal disc 203 to rotate. When the metal disc 203 is driven to rotate, the gear 204 rotates. When the gear 204 rotates, the rack 205 performs a feed motion. When the rack 205 performs a feed motion, the abutment post 206 fixed at one end of the rack 205 also follows the feed motion. At the moment the ground wire falls and contacts the insulating net, the abutment post 206 contacts the abutment block 101a, preventing the rotating wheel 101 from rotating and achieving a locking effect.

[0029] In summary, when using the retraction structure of the present invention, the motor 103 provides a large power source to pull the insulating net from the ground to the air, eliminating the need for 3 to 5 workers to work on the high-voltage line. At the same time, the locking member 200 can lock and retract the retraction structure at any time, improving work efficiency.

[0030] Example 2

[0031] Reference Figure 1 The second embodiment of the present invention differs from the first embodiment in that it further includes a rotating wheel 101 composed of an intermediate shaft 101b and rotating wheel pieces 101c disposed at both ends of the intermediate shaft 101b, and the support shaft 102 passes through one end of the non-arc surface of the intermediate shaft 101b.

[0032] The rotating wheel 101 consists of two rotating wheel pieces 101c with through grooves on their outer walls and an intermediate shaft 101b with a diameter larger than that of the support shaft 102. The two rotating wheel pieces 101c are respectively located at the two ends of the non-arc surface of the intermediate shaft 101b. The support shaft 102 passes through the center of the disc and through the center of the rotating wheel pieces 101c. The support shaft 102 is fixedly connected to the rotating wheel 101. When the support shaft 102 rotates, it can drive the rotating wheel 101 to rotate.

[0033] Furthermore, one end of the support shaft 102 is rotatably connected to the motor 103, and the abutment block 101a is provided on the outer wall of the rotating wheel 101c near the motor 103. At least one abutment block 101a is provided on the outer wall of the rotating wheel 101c.

[0034] In this case, the support shaft 102 is driven to rotate by the motor 103, and the abutment block 101a is more likely to be released by the abutment post 206 and prevent the rotating wheel 101 from rotating than when there is only one abutment block 101a.

[0035] Furthermore, the servo motor 202 is fixedly connected to the base plate 201, and two servo motors 202 are provided on the outer wall of the base plate 201, and the strokes of the two servo motors 202 are synchronized.

[0036] The servo motor 202 is fixedly connected to the base plate 201. The fixed connection can be achieved by using the positioning holes on the servo motor 202 to directly fix it to the base plate 201 with bolts, or by setting an intermediate fixing seat between the servo motor 202 and the base plate 201, fixing the servo motor 202 to the intermediate fixing seat, and then fixing the intermediate fixing seat to the base plate 201. When the stroke of the servo motor 202 is synchronized, the abutment post 206 can extend and retract at the same time, which helps to improve the efficiency of controlling the rotation and stopping of the rotating wheel 101.

[0037] Furthermore, the abutment post 206 is fixedly connected to the end of the rack 205 away from the servo motor 202, and the rack 205 reciprocates under the meshing connection with the gear 204.

[0038] The contact post 206 and the rack 205 can be fixedly connected by welding, bolting, or other methods.

[0039] Furthermore, when the abutment post 206 is driven by the rack 205 to feed the servo motor 202 to its farthest point, the abutment post 206 can abut against the abutment block 101a to prevent the rotating wheel 101 from rotating.

[0040] It should be noted that the statement that the contact post 206 can contact the contact block 101a when it is furthest from the servo motor 202 does not mean that the contact post 206 can only contact the contact block 101a when it is furthest from the servo motor 202. Rather, the contact post 206 has the strongest contact effect on the contact block 101a when it is furthest from the servo motor 202.

[0041] Furthermore, the servo motor 202 is located on both sides of the motor 103 that are not connected to the support shaft 102, and the ends of the servo motor 202 connected to the metal disk 203 are close to each other.

[0042] Among them, the servo motor 202 is located on both sides of the motor 103 that are not connected to the support shaft 102 and are not adjacent to each other. The output shaft sides of the two servo motors 202 are arranged close to each other, that is, the motor 103 is located in the middle of the two racks 205.

[0043] Furthermore, a first through groove 201a is provided on the base plate 201.

[0044] When no through slot is provided on the base plate 201, the rotating wheel 101 needs to be located outside the base plate 201 to realize the winding and unwinding of the insulating net. When the first through slot 201a is provided, the rotating wheel 101 can pass through the first through slot 201a to wind and unwind the insulating net.

[0045] In use, after the high-voltage line is placed on the retractable structure, the motor 103 rotates, driving the rotating wheel 101 to rotate and retract the line. Relying on the large torque of the motor 103, the insulating net is pulled from the ground to a suitable position in the air. The motor 103 stops, keeping the insulating net in the air position unchanged. When the servo motor 202 rotates, it drives the metal disc 203 to rotate. When the metal disc 203 is driven to rotate, the gear 204 rotates. When the gear 204 rotates, the rack 205 performs a feed motion. When the rack 205 performs a feed motion, the abutment post 206 fixed at one end of the rack 205 also follows the feed motion. At the moment the ground wire falls and contacts the insulating net, the abutment post 206 contacts the abutment block 101a, preventing the rotating wheel 101 from rotating and achieving a locking effect.

[0046] In summary, when using the retraction structure of the present invention, the motor 103 provides a large power source to pull the insulating net from the ground to the air, eliminating the need for 3 to 5 workers to work on the high-voltage line. At the same time, the locking member 200 can lock and retract the retraction structure at any time, improving work efficiency.

[0047] Example 3

[0048] Reference Figure 1 This is the third embodiment of the present invention, which differs from the previous two embodiments in that it further provides a fixing device 300: including a retractable structure, a guide rail 301, a shaft support seat 302 disposed on the outer wall of the guide rail 301, the shaft support seat 302 being penetrated by a support shaft 102, a positioning seat 303 disposed on the outer wall of the shaft support seat 302, a first fixing plate 304 disposed between the outer wall of the base plate 201 and the servo motor 202, a second fixing plate 305 disposed on the outer wall of the base plate 201 and connected to the rack 205, and a first bracket 306 disposed between the base plate 201 and the motor 103.

[0049] In this design, the shaft support 302 is penetrated by the support shaft 102. The guide rail 301 serves only to elevate the shaft support 302 so that the position of the rotating wheel 101 allows the contact post 206 and the contact block 101a to make contact easier. The positioning seat 303 can be fixed to the shaft support 302 by welding, bolting, or other connection methods. In this design, bolting is used. When the positioning seat 303 is fixed to the shaft support 302, there is a space on the outer wall of the positioning seat 303 for the rack 205 to pass through. This space can be created by direct slotting or by integral molding within the positioning seat 303. The upper part is configured as follows: the first fixing plate 304 is fixedly connected to the base plate 201 and the servo motor 202. The fixing connection method can be welding, bolt connection, etc., and bolt connection is used in this solution; the second fixing plate 305 is fixedly connected to the base plate 201. The fixing connection method can be welding, bolt connection, etc., and bolt connection is used in this solution. The second fixing plate 305 is slidably connected to the non-tooth surface of the rack 205; the first bracket 306 is fixedly connected to the base plate 201 and the motor 103. The fixing connection method can be welding, bolt connection, etc., and bolt connection is used in this solution.

[0050] Furthermore, two shaft support seats 302 are provided on both sides of the rotating wheel 101 away from the intermediate shaft 101b. The positioning seats 303 can be passed through by the rack 205 and the abutment post 206. The number of positioning seats 303 is the same as the number of racks 205. The first fixing plate 304 is fixedly connected to the base plate 201 and the servo motor 202. The second fixing plate 305 is fixedly connected to the base plate 201 and is slidably connected to the rack 205. The first bracket 306 is fixedly connected to the base plate 201 and the motor 103.

[0051] In this design, two shaft support seats 302 are located on either side of the rotating wheel 101 on the support shaft 102, away from the intermediate shaft 101b. Compared to the case of a single shaft support seat 302, the two shaft support seats 302 are symmetrically arranged with the rotating wheel 101 as the axis of symmetry, resulting in greater stability of the rotating wheel 101 during operation. The outer wall of the positioning seat 303 has a space for the rack 205 to pass through. This space can be created by direct slotting or integral molding on the positioning seat 303. The first fixing plate 304 is fixedly connected to the base plate 201 and the servo motor 202. The fixing connection can be achieved by welding, bolting, etc. In this design, the following method is used: Bolted connection; the second fixing plate 305 is fixedly connected to the base plate 201. The fixing connection method can be welding, bolting, etc. In this solution, bolting is used. The second fixing plate 305 is slidably connected to the non-tooth surface of the rack 205. The non-tooth surface of the second fixing plate 305 in contact with the rack 205 can be provided with a groove. The first bracket 306 is fixedly connected to the base plate 201 and the motor 103. The fixing connection method can be welding, bolting, etc. In this solution, bolting is used. The first fixing plate 304, the second fixing plate 305, and the first bracket 306 can be of any shape and structure as long as the fixing requirements are met.

[0052] In use, the shaft support 302 is fixed on the guide rail 301, the support shaft 102 passes through the shaft support 302 and the rotating wheel 101, and the other end of the support shaft 102 is connected to the output end of the motor 103. The motor 103 is fixed to the outer wall of the base plate 201 by the first bracket 306 and raised. The servo motor 202 is fixed to the outer wall of the base plate 201 by the first fixing plate 304. One end of the second fixing plate 305 is bolted to the base plate 201, and the other end of the second fixing plate 305 is slidably connected to the non-tooth surface of the rack 205. After the high-voltage line is placed on the retraction structure, the motor 103 rotates, driving the rotating wheel 101 to rotate. The wire is retracted, and the high torque of the motor 103 pulls the insulating net from the ground to a suitable position in the air. The motor 103 stops, keeping the insulating net in the air position. When the servo motor 202 rotates, it drives the metal disk 203 to rotate. When the metal disk 203 is driven to rotate, the gear 204 rotates. When the gear 204 rotates, the rack 205 performs a feed motion. When the rack 205 performs a feed motion, the abutment post 206 fixed to one end of the rack 205 also performs a feed motion. At the moment when the ground wire falls and contacts the insulating net, the abutment post 206 contacts the abutment block 101a, preventing the rotating wheel 101 from rotating and achieving a locking effect.

[0053] In summary, when using this invention, the motor 103 provides a large power source, enabling the insulation net to be pulled from the ground to a high altitude without requiring 3-5 workers to work on the high-voltage line. At the same time, the locking component 200 can lock and retract the structure at any time, improving work efficiency. The fixing device 300 allows the rotating wheel 101 to withstand the impact force of the insulation net, improving the overall stability and reliability of the device. In addition, the shaft support 302, fixing seat 303, first fixing plate 304, second fixing plate 305, and first bracket 306 facilitate the disassembly, maintenance, and replacement of each component.

[0054] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0055] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0056] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fixing device, characterized in that: include The rotating component (100) includes a rotating wheel (101), a support shaft (102) that passes through the outer wall of the rotating wheel (101), a motor (103) that is disposed at one end of the support shaft (102), and an abutting block (101a) that is disposed on the outer wall of the rotating wheel (101). The locking component (200) includes a base plate (201) connected to one end of a motor (103), a servo motor (202) disposed on the outer wall of the base plate (201), a metal disk (203) disposed at one end of the servo motor (202), a gear (204) disposed at one end of the metal disk (203), a rack (205) meshing with the gear (204), and an abutment post (206) disposed at one end of the rack (205); The abutting post (206) is fixedly connected to the end of the rack (205) away from the servo motor (202), and the rack (205) reciprocates under meshing connection with the gear (204); When the abutment post (206) is fed to the furthest distance from the servo motor (202) by the rack (205), the abutment post (206) can abut against the abutment block (101a) to prevent the rotating wheel (101) from rotating; And a guide rail (301), a shaft support seat (302) disposed on the outer wall of the guide rail (301), the shaft support seat (302) being penetrated by a support shaft (102), a positioning seat (303) disposed on the outer wall of the shaft support seat (302), a first fixing plate (304) disposed between the outer wall of the base plate (201) and the servo motor (202), a second fixing plate (305) disposed on the outer wall of the base plate (201) and connected to the rack (205), and a first bracket (306) disposed between the base plate (201) and the motor (103). Two shaft support seats (302) are provided on both sides of the rotating wheel (101) away from the intermediate shaft (101b). The positioning seats (303) can be passed through by the rack (205) and the abutment post (206). The number of positioning seats (303) is the same as the number of racks (205). The first fixing plate (304) is fixedly connected to the base plate (201) and the servo motor (202). The second fixing plate (305) is fixedly connected to the base plate (201). The second fixing plate (305) is slidably connected to the rack (205). The first bracket (306) is fixedly connected to the base plate (201) and the motor (103).

2. The fixing device as described in claim 1, characterized in that: The rotating wheel (101) is composed of an intermediate shaft (101b) and rotating wheel pieces (101c) located at both ends of the intermediate shaft (101b). The support shaft (102) passes through one end of the non-arc surface of the intermediate shaft (101b).

3. The fixing device as described in claim 2, characterized in that: One end of the support shaft (102) is rotatably connected to the motor (103), and the abutment block (101a) is provided on the outer wall of the rotating wheel (101c) near the motor (103). There is at least one abutment block (101a) on the outer wall of the rotating wheel (101c).

4. The fixing device as described in claim 3, characterized in that: The servo motor (202) is fixedly connected to the base plate (201). Two servo motors (202) are provided on the outer wall of the base plate (201), and the strokes of the two servo motors (202) are synchronized.

5. The fixing device as described in claim 1, characterized in that: The servo motor (202) is located on both sides of the motor (103) that are not connected to the support shaft (102), and the ends of the servo motor (202) connected to the metal disk (203) are close to each other.

6. The fixing device as described in claim 1, characterized in that: The base plate (201) has a first through groove (201a).

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