A drilling device for processing power distribution cabinet of power supply system

Abstract

The invention discloses a drilling device for processing a power distribution cabinet of a power supply system, and relates to the technical field of punching equipment; it comprises a support bracket and a drilling structure; the drilling structure comprises a processing table mounted on the support bracket, and a driving roller located on one side of the processing table is mounted on the support bracket; the transmission structure comprises a primary slide, a secondary slide is slidably mounted in the primary slide, a locking block is mounted in the secondary slide, and a primary slider is mounted in the secondary slide; a primary motor is mounted on the support bracket, a crank is mounted on the primary motor, and the crank is connected to the primary slider through a rocker; a rack is mounted on the side of the secondary slide, and a one-way structure connected to the driving roller is mounted on the support bracket, and a transmission gear is mounted on the outside of the one-way structure, and the transmission gear and the rack are meshed. The device can automatically perform multi-point punching on the power distribution cabinet, and the position is precisely adjustable, and it is very convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, in particular to a drilling device for processing a power distribution cabinet of a power supply system. Background Art

[0002] The power distribution cabinet is also called the distribution box. It is divided into power distribution cabinet, lighting distribution cabinet and metering cabinet, etc. It is the final equipment of the power distribution system. The power distribution cabinet is a general term for the motor control center. The power distribution cabinet is used in places where the load is relatively dispersed and there are fewer circuits; the motor control center is used in places where the load is concentrated and there are more circuits. They distribute the power of a circuit of the upper-level distribution equipment to the nearest load. This level of equipment should provide protection, monitoring and control for the load. The power distribution cabinet is generally made of thin steel plates or aluminum alloy plates to form a cabinet structure.

[0003] The materials of the power distribution cabinet include cables, rails, insulating tapes and technical plates. After the materials arrive at the manufacturer, they need to be inspected to ensure that they meet the production requirements. In the cabinet production process, the required size of the plate needs to be placed in the CNC machine tool for processing according to production requirements, and then the iron sheet is formed by machine bending, punching and other processes, and cut as needed. Finally, the surface of the formed iron sheet is treated by powder spraying, plastic spraying and other methods to achieve a beautiful and anti-corrosion effect.

[0004] Targeted holes need to be drilled on the side of the distribution cabinet for installing wiring heads, and generally multiple holes need to be set on a distribution cabinet. The drilling device currently used in distribution cabinets mainly consists of a drill bit. Since the structure of the distribution cabinet is a cabinet body, and holes need to be drilled in multiple locations, and the number and spacing of holes required for distribution cabinets with different wiring numbers are also different, after each hole is drilled, the position of the distribution cabinet is generally adjusted manually to determine the next hole position and drill. This method has a low degree of mechanization and is highly dependent on manual labor. In addition, manual operation requires repeated confirmation of the location of each hole, which wastes a lot of time. Even so, there is still a problem of large positioning errors. Summary of the invention

[0005] The purpose of the present invention is to provide a drilling device for processing a power distribution cabinet of a power supply system to solve the problems raised in the above-mentioned background technology. A drilling device capable of automatically transferring a power distribution cabinet is proposed, which does not require manual operation, can continuously change the position of the power distribution cabinet, realize equal-spaced drilling, and can accurately adjust the drilling spacing, which is very convenient to use.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The transmission structure is a kind of transmission mechanism that the transmission mechanism is a kind of transmission mechanism that the transmission mechanism is a kind of transmission mechanism that the transmission mechanism is a kind of.

[0008] The one-way structure is used for one-way transmission between the transmission gear and the driving roller; the drilling structure is used for drilling holes in the side plate of the power distribution cabinet placed on the processing table;

[0009] A positioning structure is installed on the support bracket, the support bracket is connected to the counterweight base, and a limiting structure is installed on the counterweight base. The positioning structure and the limiting structure limit the position of the distribution cabinet from the front and back sides of the distribution cabinet respectively.

[0010] As a further solution of the present invention: the surface of the secondary slide groove is provided with scale lines, and a primary screw is installed at one end of the locking block away from the primary slider, and the primary screw passes through the secondary slide groove and is threadedly connected to the secondary slide groove.

[0011] As a further solution of the present invention: the one-way structure includes a ratchet ring installed inside the transmission gear, the driving roller is connected to the rotating shaft, a turntable is installed at one end of the rotating shaft inserted into the ratchet ring, a ratchet is connected to the turntable through a spring, and the ratchet is inserted into the tooth groove of the ratchet ring.

[0012] As a further solution of the present invention: the drilling structure includes a cylinder installed on a supporting bracket, the cylinder is connected to a secondary motor, the secondary motor is connected to a drill bit, the drill bit points to a processing table, and a feeding hole corresponding to the position of the drill bit is opened on the processing table.

[0013] As a further solution of the present invention: the fixing structure includes telescopic rods installed on both sides of the drilling structure, the telescopic rods point to the plane where the processing table is located, the telescopic rods are connected to the mounting frame, and a plurality of pressure rollers are installed on the mounting frame.

[0014] As a further solution of the present invention: the positioning structure includes a horizontal plate arranged on the surface of the support bracket, and two ends of the horizontal plate are rotatably installed with secondary screws, and the secondary screws pass through the support bracket and are threadedly connected to the support bracket.

[0015] As a further solution of the present invention: the counterweight base is connected to the support bracket in a T-shape, and a plurality of mounting holes are formed on the counterweight base.

[0016] As a further solution of the present invention: the limiting structure includes a support plate installed at one end of the counterweight base, a baffle is arranged between the support plate and the support bracket, an X-shaped cross support rod is connected between the baffle and the support plate, a slide rail is installed on the surface of the baffle, two opposite secondary sliders are installed on the slide rail, and the secondary sliders are respectively connected to the two support rods.

[0017] As a further solution of the present invention: a through groove is opened at one end of the support plate, a three-stage screw is installed in the through groove and passes through the support plate, a threaded barrel is threadedly connected to the three-stage screw, and the threaded barrel and the support plate are respectively connected to the end point of a support rod.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The drilling device for processing the power distribution cabinet of the power supply system is adopted. This device uses a processing table to drill holes in the side panels of the power distribution cabinet. A driving roller is installed on one side of the processing table, and a transmission assembly for controlling the rotation of the driving roller is installed on the back of the supporting bracket. The crank in the transmission assembly rotates, which drives the sliding of the primary slider through the rocker. The two ends of the primary slider are the edges of the locking block and the secondary slide groove respectively. Therefore, when the primary slider hits the locking block or the edge of the primary slide groove, it drives the primary slide groove to move, and the rack on the primary slide groove interacts with the transmission gear, which can make the driving roller rotate unidirectionally, and drive the power distribution cabinet to translate in the gap of the drilling hole;

[0020] The drilling device for processing the distribution cabinet of the power supply system is adopted. In this device, the distance that the driving roller drives the distribution cabinet to move horizontally is linearly related to the sliding distance of the secondary slide, and the sliding distance of the primary slide can be accurately adjusted by changing the position of the locking block. Therefore, this device can automatically move the distribution cabinet in the gap of drilling holes. The moving distance is fixed each time, and the moving distance can be flexibly set, which improves the efficiency of automated production, reduces tedious manual operations, and significantly improves the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the drilling device used for processing the power distribution cabinet of the power supply system.

[0022] Figure 2This is a structural diagram of the cooperation between the drilling device for processing the power distribution cabinet of the power supply system and the distribution cabinet.

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of a drilling device used for processing a power distribution cabinet in a power supply system.

[0024] Figure 4 This is a schematic diagram of the partial front structure of the drilling device used for processing the power distribution cabinet of the power supply system.

[0025] Figure 5 This is a schematic diagram of the transmission structure in the drilling device used for processing the power distribution cabinet of the power supply system.

[0026] Figure 6 This is a schematic diagram of the one-way structure of the drilling device used for processing the power distribution cabinet of the power supply system.

[0027] In the figure: 1-support bracket; 2-transmission structure; 21-primary motor; 22-crank; 23-rocker; 24-primary screw; 25-primary slide; 26-secondary slide; 261-primary slider; 262-scale line; 27-locking block; 28-rack; 3-positioning structure; 31-secondary screw; 32-cross plate; 4-counterweight base; 41-mounting hole; 5-drilling structure; 51-cylinder; 52-secondary motor; 53-drill bit; 54 -processing table; 541-feeding hole; 6-fixed structure; 61-telescopic rod; 62-mounting frame; 63-pressing roller; 64-driving roller; 7-limiting structure; 71-baffle; 72-slide rail; 73-support rod; 74-support plate; 741-through groove; 75-third-stage screw; 76-threaded cylinder; 77-second-stage slider; 8-one-way structure; 81-transmission gear; 82-ratchet ring; 83-ratchet tooth; 84-spring; 85-turntable; 86-rotating shaft. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 6In an embodiment of the present invention, a drilling device for processing a power distribution cabinet of a power supply system includes a support bracket 1 and a drilling structure 5; the drilling structure 5 includes a processing table 54 installed on the support bracket 1, and a fixed structure 6 located around the processing table 54 is installed on the support bracket 1, and the fixed structure 6 includes a driving roller 64 located on one side of the processing table 54; a transmission structure 2 is installed on a side of the support bracket 1 away from the processing table 54; the transmission structure 2 includes a primary slide 25 installed on the support bracket 1, and a secondary slide is slidably installed in the primary slide 25 26, a locking block 27 is installed in the secondary slide 26, and a primary slider 261 is installed in the secondary slide 26; a primary motor 21 located on one side of the primary slide 25 is installed on the support bracket 1, a crank 22 is installed on the primary motor 21, and the crank 22 is connected to the primary slider 261 through a rocker 23; a rack 28 is installed on the side of the secondary slide 26, and a one-way structure 8 connected to the driving roller 64 is installed on the support bracket 1, and a transmission gear 81 is installed on the outside of the one-way structure 8, and the transmission gear 81 is meshed with the rack 28;

[0030] The one-way structure 8 is used for one-way transmission between the transmission gear 81 and the driving roller 64; the drilling structure 5 is used for drilling holes in the side plate of the power distribution cabinet placed on the processing table 54;

[0031] A positioning structure 3 is installed on the support bracket 1, and the support bracket 1 is connected to a counterweight base 4. A limiting structure 7 is installed on the counterweight base 4. The positioning structure 3 and the limiting structure 7 limit the position of the distribution cabinet from the front and back sides respectively.

[0032] The device uses a vertical support bracket 1 as an installation platform, a drilling structure 5 is installed above the support bracket 1, and a processing table 54 is used to place the distribution cabinet to be processed. The cabinet body of the distribution cabinet is buckled on the processing table 54, and a side plate on the top is placed on the processing table 54 for processing. A driving roller 64 is arranged on one side of the processing table 54. Under the action of the fixed structure 6, the driving roller 64 has a supporting effect on the distribution cabinet and is in pressure contact with the side plate of the distribution cabinet. Therefore, when the driving roller 64 is rotated by the transmission structure 2, it can drive the distribution cabinet to move, move the punched area to one side, and replace the new position for punching, so as to achieve the purpose of automatically adjusting the position and performing multiple punching.

[0033] The transmission structure 2 is provided with a primary chute 25 for limiting the trajectory, and the secondary chute 26 inside can slide in the primary chute 25. When the secondary chute 26 slides, the rack 28 drives the transmission gear 81 to drive the driving roller 64 to rotate. A one-way structure 8 is connected between the transmission gear 81 and the driving roller 64, which can control the driving roller 64 to rotate in one direction, so that the distribution cabinet will not retreat. The sliding of the secondary chute 26 mainly comes from the push of the primary slider 261. The primary motor 21 drives the crank 22 to rotate, which is transmitted to the primary slider 261 through the rocker 23, so that the primary slider 261 slides back and forth, and the sliding stroke is twice the length of the crank 22. The primary slider 261 moves between the edge of the secondary chute 26 and the locking block 27, and the stroke length of the secondary slider 77 is greater than the distance between the locking block 27 and the edge of the secondary chute 26. Therefore, during the sliding process, it will contact the edge of the secondary chute 26 and the locking block 27, and drive the secondary chute 26 to slide after contact.

[0034] It can be seen from the above description that the sliding distance of the secondary chute 26 is equal to twice the effective length of the crank 22 minus the distance between the edge of the secondary chute 26 and the locking block 27 plus the width of the primary slider 261. Therefore, by changing the position of the locking block 27, the sliding stroke of the secondary chute 26 can be directly and accurately adjusted, and then the distance that the driving roller 64 drives the distribution cabinet to move each time can be accurately adjusted. Through the design of the transmission structure 2 and the driving roller 64, this device can automatically complete the drilling work of multiple holes in the process of processing the distribution cabinet, and has the function of accurately locating the spacing and automatically adjusting the drilling position, which significantly improves the degree of mechanization, reduces the steps of manual operation, and improves the efficiency of the drilling machine.

[0035] As another embodiment of the present invention, please refer to Figure 5 , the surface of the secondary slide 26 is provided with a scale line 262, and the end of the locking block 27 away from the primary slider 261 is installed with a primary screw 24, and the primary screw 24 passes through the secondary slide 26 and is threadedly connected with the secondary slide 26. The scale line 262 is set according to the rotation length of the surface of the driving roller 64, and the reading is directly compared with the length distance of each movement of the distribution cabinet, which is convenient for adjusting the locking block 27. The primary screw 24 is used to adjust the locking block 27. By rotating the primary screw 24, the position of the locking block 27 can be changed with high precision.

[0036] See also Figure 5 and Figure 6The one-way structure 8 includes a ratchet ring 82 installed inside the transmission gear 81, the driving roller 64 is connected to the rotating shaft 86, and a turntable 85 is installed on one end of the rotating shaft 86 inserted into the ratchet ring 82. The turntable 85 is connected with ratchet teeth 83 through springs 84, and the ratchet teeth 83 are inserted into the tooth grooves of the ratchet ring 82. The ratchet teeth 83 are restricted by the ratchet ring 82, and the transmission gear 81 and the ratchet ring 82 rotate synchronously. The rotation in one direction will drive the rotating shaft 86 to rotate synchronously, and the rotation in the other direction will not affect the rotating shaft 86. There are different types of ratchet-type one-way transmission structures. The one-way structure 8 described in this device does not belong to a restrictive structure. Ratchet-type structures generated by other matching methods, such as a structure where the ratchet teeth 83 are located outside the ratchet, also meet the structural requirements of this device.

[0037] See also Figures 1 to 4 The drilling structure 5 includes a cylinder 51 installed on the support bracket 1, the cylinder 51 is connected to the secondary motor 52, the secondary motor 52 is connected to the drill bit 53, the drill bit 53 points to the processing table 54, and the processing table 54 is provided with a feed hole 541 corresponding to the position of the drill bit 53. The cylinder 51 can control the lifting and lowering of the secondary motor 52, and the secondary motor 52 drives the drill bit 53 to rotate and drill holes on the side panel of the power distribution cabinet. During the drilling process, the drill bit 53 is gradually inserted into the feed hole 541, and the waste is discharged from the feed hole 541 after the drilling is completed. The cylinder 51 is not a restrictive structure, and the use of a hydraulic cylinder or other mechanical structure that can be used for lifting, such as a scissor mechanism, can also meet the functional requirements of the present device.

[0038] See also Figures 1 to 4 The fixed structure 6 includes telescopic rods 61 installed on both sides of the drilling structure 5. The telescopic rods 61 point to the plane where the processing table 54 is located. The telescopic rods 61 are connected to the mounting frame 62, and a plurality of pressure rollers 63 are installed on the mounting frame 62. The fixed structure 6 is used to press the side panels of the power distribution cabinet during the drilling and moving process to prevent loosening, sliding or offset. The telescopic rods 61 are automatically telescopic rod structures, and cylinders 51, hydraulic cylinders or electric push rods can be used. Through the mounting frame 62, multiple pressure rollers 63 can be controlled to press together to enhance the stability of the power distribution cabinet.

[0039] See also Figures 1 to 3The positioning structure 3 includes a horizontal plate 32 arranged on the surface of the support bracket 1, and the two ends of the horizontal plate 32 are rotatably mounted with secondary screws 31, and the secondary screws 31 pass through the support bracket 1 and are threadedly connected to the support bracket 1. The horizontal plate 32 of the positioning structure 3 is located on the inner side of the distribution cabinet to limit the range of movement of the distribution cabinet. Due to the different number of wiring connections, the number of holes required to be punched on the distribution cabinet is also different. The holes can be arranged in one row, two rows or other arrangements. The horizontal plate 32 is used to block the distribution cabinet, and the punching position of the distribution cabinet can be adjusted to prevent the distribution cabinet from moving forward and backward. The secondary screw 31 is used to adjust the position of the horizontal plate 32.

[0040] See also Figures 1 to 3 The counterweight base 4 is connected to the support bracket 1 in a T-shape, and a plurality of mounting holes 41 are provided on the counterweight base 4. The counterweight base 4 can provide support force for the support bracket 1 to keep the support bracket 1 in a vertical state, and the counterweight base 4 can also be fixed on the ground or other planes through the mounting holes 41 to enhance the support capacity.

[0041] See also Figures 1 to 3 The limiting structure 7 includes a support plate 74 installed at one end of the counterweight base 4, a baffle 71 is arranged between the support plate 74 and the support bracket 1, and a support rod 73 in an X-shaped cross is connected between the baffle 71 and the support plate 74. A slide rail 72 is installed on the surface of the baffle 71, and two opposite secondary sliders 77 are installed on the slide rail 72. The secondary sliders 77 are respectively connected to the two support rods 73. The limiting structure 7 is used to limit the position of the distribution cabinet from the outside, and cooperates with the cross plate 32 to prevent the distribution cabinet from sliding inward or outward. The position of the support plate 74 is fixed. By changing the angle between the two support rods 73, the position of the baffle 71 can be changed to adjust the range of limitation. Neither the baffle 71 nor the cross plate 32 is in pressure contact with the distribution cabinet, but only serves as a preventive limiting structure, so it will not affect the lateral translation of the distribution cabinet.

[0042] See also Figures 1 to 3, one end of the support plate 74 is provided with a through slot 741, in which a three-stage screw 75 penetrating the support plate 74 is installed, and a threaded barrel 76 is threadedly connected to the three-stage screw 75, and the threaded barrel 76 and the support plate 74 are respectively connected to the end point of a support rod 73. The threaded portion of the secondary screw 31 is located in the through slot 741, and the threaded barrel 76 can slide along the secondary screw 31, change the angle of the support rod 73, and adjust the position of the baffle 71. Neither the positioning structure 3 nor the limiting structure 7 is a necessary structure. The same effect can be achieved by setting a limiting structure near the processing table 54, or using a suction cup-type fixture that can be translated and retracted. For the sake of simplifying the description, the primary screw 24, the secondary screw 31 and the tertiary screw 75 in this device are all driven to rotate by the end of the screw itself by default, so the drive is not described in detail. In addition to the end of the operating screw, a T-shaped rotating rod or a motor can also be installed to provide drive.

[0043] The working principle of the present invention is:

[0044] The device uses a support bracket 1 as an installation platform, and a drilling structure 5 is provided on the support bracket 1. A processing table 54 is used as a working surface for drilling. The side panels of the power distribution cabinet are hung on the processing table 54, and supported by the processing table 54 and the driving roller 64. At the same time, other parts of the fixed structure 6 are pressed from above to press the power distribution cabinet to prevent it from falling off. After the drilling structure 5 completes a drilling, the transmission structure 2 located on the back of the support bracket 1 can drive the driving roller 64 to rotate a specified angle, thereby moving the power distribution cabinet to a specified distance. The device can ensure that the spacing of each movement is consistent and the distance can be accurately adjusted. The device can automatically complete the work of continuous drilling on the surface of the power distribution cabinet, ensuring the accuracy of the drilling, and can flexibly adjust the drilling spacing according to actual needs, significantly improving the convenience of use.

[0045] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A drilling device for processing a power distribution cabinet of a power supply system, comprising a support bracket and a drilling structure; characterized in that: The drilling structure includes a processing table installed on a supporting bracket, and a fixed structure located around the processing table is installed on the supporting bracket, and the fixed structure includes a driving roller located on one side of the processing table; a transmission structure is installed on the side of the supporting bracket away from the processing table; the transmission structure includes a primary slide groove installed on the supporting bracket, a secondary slide groove is slidably installed in the primary slide groove, a locking block is installed in the secondary slide groove, and a primary slider is installed in the secondary slide groove; a primary motor located on one side of the primary slide groove is installed on the supporting bracket, a crank is installed on the primary motor, and the crank is connected to the primary slider through a rocker; a rack is installed on the side of the secondary slide groove, and a one-way structure connected to the driving roller is installed on the supporting bracket, and a transmission gear is installed on the outside of the one-way structure, and the transmission gear is meshed with the rack; The one-way structure is used for one-way transmission between the transmission gear and the driving roller; the drilling structure is used for drilling holes in the side plate of the power distribution cabinet placed on the processing table; A positioning structure is installed on the support bracket, the support bracket is connected to the counterweight base, and a limiting structure is installed on the counterweight base. The positioning structure and the limiting structure limit the position of the distribution cabinet from the front and back sides of the distribution cabinet respectively.

2. The drilling device for processing a power distribution cabinet of a power supply system according to claim 1, characterized in that: The surface of the secondary slide groove is provided with scale lines, and the end of the locking block away from the primary sliding block is installed with a primary screw rod, and the primary screw rod passes through the secondary slide groove and is threadedly connected with the secondary slide groove.

3. The drilling device for processing a power distribution cabinet of a power supply system according to claim 1, characterized in that: The one-way structure includes a ratchet ring installed inside the transmission gear, the driving roller is connected to the rotating shaft, and a rotating disk is installed at one end of the rotating shaft inserted into the ratchet ring. The rotating disk is connected to ratchets through springs, and the ratchets are inserted into the tooth grooves of the ratchet ring.

4. The drilling device for processing a power distribution cabinet of a power supply system according to claim 1, characterized in that: The drilling structure includes a cylinder installed on a supporting bracket, the cylinder is connected to a secondary motor, the secondary motor is connected to a drill bit, the drill bit points to a processing table, and a feeding hole corresponding to the position of the drill bit is opened on the processing table.

5. The drilling device for processing a power distribution cabinet of a power supply system according to claim 1, characterized in that: The fixing structure comprises telescopic rods installed on both sides of the drilling structure, the telescopic rods point to the plane where the processing table is located, the telescopic rods are connected to the mounting frame, and a plurality of pressure rollers are installed on the mounting frame.

6. The drilling device for processing a power distribution cabinet of a power supply system according to claim 1, characterized in that: The positioning structure comprises a transverse plate arranged on the surface of the support bracket, and two ends of the transverse plate are rotatably mounted with secondary screw rods, and the secondary screw rods pass through the support bracket and are threadedly connected with the support bracket.

7. The drilling device for processing a power distribution cabinet of a power supply system according to claim 1, characterized in that: The counterweight base is connected to the support bracket in a T-shape, and a plurality of mounting holes are provided on the counterweight base.

8. The drilling device for processing a power distribution cabinet of a power supply system according to claim 1, characterized in that: The limiting structure includes a support plate installed at one end of the counterweight base, a baffle is arranged between the support plate and the support bracket, an X-shaped cross support rod is connected between the baffle and the support plate, a slide rail is installed on the surface of the baffle, two opposite secondary sliders are installed on the slide rail, and the secondary sliders are respectively connected to the two support rods.

9. The drilling device for processing a power distribution cabinet of a power supply system according to claim 8, characterized in that: A through slot is formed at one end of the support plate, a three-stage screw penetrating the support plate is installed in the through slot, a threaded barrel is threadedly connected to the three-stage screw, and the threaded barrel and the support plate are respectively connected to the end point of a support rod.

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