Stepless air pressure lifting piano frame center shaft and machining equipment

Abstract

The invention discloses an electrodeless air pressure lifting piano frame center shaft and machining equipment, and relates to the technical field of machining equipment. The device comprises two supports, top shafts are fixedly connected to the top ends of the supports, the two top shafts are rotationally connected, a fifth rotating shaft is fixedly connected to the position, close to the center, between the inner walls of the other support, and an air pressure telescopic rod is rotationally connected to the center of the outer ring of the fifth rotating shaft. A rotating frame is rotationally connected between the inner walls of the other support and close to the top, and the other end of the air pressure telescopic rod is fixedly connected with the rotating frame. According to the spraying device, a first electric cylinder and a second motor are operated, then under the mutual cooperation of a cutting assembly, a spraying assembly, a drill bit body and a spraying head, the work of comprehensive spraying of the steel pipe is achieved, and then the problem that the punched piano frame center shaft steel pipe is transferred to a plastic spraying device to be sprayed is solved; and the manufacturing process of the center shaft of the musical instrument rack is increased.

Description

Technical Field

[0001] The invention relates to the technical field of processing equipment, in particular to a stepless air pressure lifting piano stand center axis and processing equipment. Background Art

[0002] As a special instrument stand, the lifting piano stand is usually designed with a lifting device to adapt to different heights or performance requirements. This kind of piano stand may include a frame, a leg, and a lifting mechanism connecting the frame and the leg. In the lifting mechanism, the center axis is a key component, which plays a supporting and transmission role. As one of the core components of the lifting piano stand, the center axis bears the weight of the entire piano stand and the weight of the instrument itself. It must be strong and stable enough to ensure the safety and stability of the piano stand during the lifting process; In the existing process of processing and manufacturing the middle axis of the music frame, it is necessary to first punch holes in the raw material steel pipe needed for the middle axis of the music frame, and then transfer the punched steel pipe of the middle axis of the music frame to the spray-painting device for spraying, thereby increasing the production process of the middle axis of the music frame and extending the processing time of the middle axis of the music frame. At the same time, in the process of spraying the raw material steel pipe, it is necessary to use a clamping device to limit the position, but the existing clamping device will block part of the steel pipe, resulting in the inability to spray, and manual supplementation is required later, which increases labor and affects work efficiency. In view of the above problems, the inventor proposes a stepless pneumatic pressure lifting music frame middle axis and processing equipment to solve the above problems. Summary of the invention

[0003] In order to solve the problem that the production process of the music frame center axis is increased by transferring the punched music frame center axis steel pipe to the plastic spraying device for spraying, and in the process of spraying the raw material steel pipe, a clamping device is needed to limit the position, but the clamping device will block part of the steel pipe and make it impossible to spray; the purpose of the present invention is to provide a stepless pneumatic pressure lifting music frame center axis and processing equipment.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: an infinitely variable pneumatic lifting piano stand center axis, comprising two brackets, a top shaft is fixedly connected to the top of the bracket, and the two top shafts are rotatably connected, a rotating shaft five is fixedly connected between the inner walls of the other bracket and near the center, a pneumatic telescopic rod is rotatably connected to the center of the outer circle of the rotating shaft five, a rotating frame is rotatably connected between the inner walls of the other bracket and near the top, and the other end of the pneumatic telescopic rod is fixedly connected to the rotating frame.

[0005] Preferably, the outer ring of the top shaft is symmetrically fixedly connected with an anti-slip sleeve 1 near both sides, a handle is fixedly connected at the center of one of the side ends of the bracket, the bottom end of the bracket is fixedly connected with a bottom shaft, and the outer ring of the bottom shaft is symmetrically fixedly connected with an anti-slip sleeve 2 near both sides.

[0006] The processing equipment used for the central axis of the stepless pneumatic lifting piano stand includes a base, the back end of the base is fixedly connected to a vertical plate, the front end of the vertical plate and near the top center are symmetrically slidably connected to a cutting component and a spraying component, the top of the base is fixedly connected to a clamping component near the center of one side, the front end of the vertical plate and near the top center are symmetrically fixedly connected to a rack, and the rack is located above the cutting component and the spraying component, the top of the vertical plate and near the two sides are symmetrically fixedly connected to an electric cylinder 1, the two output ends of the electric cylinder 1 are symmetrically fixedly connected to L-shaped plates, and the two L-shaped plates are respectively fixedly connected to the cutting component and the spraying component.

[0007] Preferably, the cutting assembly includes an installation box 1, a slide plate 1 is slidably connected to the inner wall of the installation box 1 near the center, an L-shaped block is fixedly connected to the front end of the slide plate 1, a screw rod 1 is rotatably connected to the top of the inner top of the installation box 1 and near one side, and the slide plate 1 is threadedly rotatably connected to the screw rod 1.

[0008] Preferably, the spraying assembly includes an installation box 2, a slide plate 2 is slidably connected to the inner wall of the installation box 2 near the center, a screw rod 2 is rotatably connected to the top of the inside of the installation box 2 and near one side, and the slide plate 2 is threadedly rotatably connected to the screw rod 2, the top of the installation box 1 and the installation box 2 and near the center of one side are both rotatably connected to a gear 1, and the gear 1 is meshed with a rack, the top of the screw rod 1 passes through the installation box 1 and is fixedly connected to one of the gears 1, the top of the screw rod 2 passes through the installation box 2 and is fixedly connected to the other gear 1, the front end of the slide plate 2 is fixedly connected to a support plate, the center of the bottom end of the support plate is fixedly connected to a driving slide, the bottom end of the driving slide is provided with a connecting frame, and the bottom end of the connecting frame is fixedly connected to a spray head.

[0009] Preferably, a square plate 1 is provided at the bottom end of the L-shaped block, an electric cylinder 2 is fixedly connected to the top of the L-shaped block, the output end of the electric cylinder 2 passes through the L-shaped block and is fixedly connected to the square plate 1, the bottom end of the square plate 1 is fixedly connected to the square plate 2, the center of the bottom end of the square plate 2 is rotatably connected to the drill body, the center of the top end of the square plate 2 is fixedly connected to the motor 2, and the output end of the motor 2 passes through the square plate 2 and is fixedly connected to the drill body.

[0010] Preferably, the clamping assembly includes a side plate, and the bottom end of the side plate is fixedly connected to the base, the side end of the side plate is rotatably connected to a fixed groove wheel near the center, the side end of the side plate is rotatably connected to a fixed groove wheel, and the fixed dial is adapted to the fixed groove wheel, and the side end of the side plate away from the fixed groove wheel is fixedly connected to a motor 1, and the output end of the motor 1 passes through the side plate and is fixedly connected to the fixed dial.

[0011] Preferably, the side plate is rotatably connected to a side shaft at one end away from the fixed dial, and the side end of the side shaft passes through the side plate and is fixedly connected to the fixed groove wheel, the outer ring of the side shaft is detachably connected to a plurality of mounting blocks, the centers of the two side ends of the mounting blocks are symmetrically fixedly connected to guide telescopic rods, the two guide telescopic rods are symmetrically fixedly connected to annular clamping plates at one end away from the mounting blocks, the side end of the annular clamping plate is fixedly connected to a spring, and the other end of the spring is fixedly connected to the mounting block, and the spring is sleeved on the outer ring of the guide telescopic rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention solves the problem that during the spraying process of the raw material steel pipe, the clamping device needs to be used for position limiting, but the clamping device will block part of the steel pipe, resulting in failure to spray by means of rotating the mounting side shaft and then cooperating between the clamping assembly and the mounting block as well as the spring and the guide telescopic rod; 2. The present invention realizes the comprehensive spraying of the steel pipe by running the electric cylinder 1 and the motor 2, and then the cooperation between the cutting assembly and the spraying assembly as well as the drill body and the spray head, thereby solving the problem of increasing the production process of the piano frame center axis by transferring the punched piano frame center axis steel pipe to the plastic spraying device for spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the structure of the device of the present invention.

[0016] Figure 3 It is a schematic cross-sectional structure diagram of the installation box of the present invention.

[0017] Figure 4 It is a schematic diagram of the side panel structure of the present invention.

[0018] Figure 5 For the present invention Figure 1 Enlarged structural diagram at A in the middle.

[0019] Figure 6 For the present invention Figure 4 Enlarged structural diagram at B in the middle.

[0020] Figure 7For the present invention Figure 3 Enlarged structural diagram at point C in the middle.

[0021] Figure 8 For the present invention Figure 3 Enlarged structural diagram at point D in the middle.

[0022] In the figure: 1. base; 101. vertical plate; 102. rack; 103. electric cylinder 1; 104. L-shaped plate; 105. gear 1; 2. clamping assembly; 201. side plate; 202. fixed groove wheel; 203. fixed dial; 204. motor 1; 205. side shaft; 206. mounting block; 207. guide telescopic rod; 208. spring; 209. annular clamp; 3. cutting assembly; 301. mounting box 1; 302. L-shaped block; 303. slide plate 1; 304. screw rod 1; 305. Square plate one; 306. Electric cylinder two; 307. Square plate two; 308. Motor two; 309. Drill body; 4. Spraying assembly; 401. Mounting box two; 402. Slide plate two; 403. Screw rod two; 404. Support plate; 405. Drive slide; 406. Connecting frame; 407. Spray head; 5. Bracket; 51. Handle; 52. Rotating shaft five; 53. Pneumatic telescopic rod; 54. Top shaft; 55. Anti-skid sleeve one; 56. Bottom shaft; 57. Anti-skid sleeve two; 58. Rotating frame. DETAILED DESCRIPTION

[0023] 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.

[0024] Example: Figure 1-8 As shown, the present invention provides a technical solution: an infinitely variable pneumatic lifting piano stand center axis, comprising two brackets 5, a top shaft 54 ​​is fixedly connected to the top of the bracket 5, and the two top shafts 54 are rotatably connected, a rotating shaft 52 is fixedly connected between the inner walls of the other bracket 5 and near the center, a pneumatic telescopic rod 53 is rotatably connected to the center of the outer circle of the rotating shaft 52, a rotating frame 58 is rotatably connected between the inner walls of the other bracket 5 and near the top, and the other end of the pneumatic telescopic rod 53 is fixedly connected to the rotating frame 58.

[0025] The top shaft 54 ​​is symmetrically fixedly connected with an anti-skid sleeve 55 on the outer circle and near the two sides, a handle 51 is fixedly connected to the center of the side end of one of the brackets 5, a bottom shaft 56 is fixedly connected to the bottom end of the bracket 5, and an anti-skid sleeve 57 is symmetrically fixedly connected with the outer circle of the bottom shaft 56 and near the two sides.

[0026] By adopting the above technical solution, the anti-skid cover 1 55 and the anti-skid cover 2 57 are provided to prevent the bracket 5 from sliding when supporting the piano stand, and the carrying handle 51 is provided to facilitate carrying the bracket 5.

[0027] The processing equipment used for the central axis of the stepless pneumatic lifting piano stand includes a base 1, a vertical plate 101 is fixedly connected to the back end of the base 1, a cutting component 3 and a spraying component 4 are symmetrically slidably connected to the front end of the vertical plate 101 and near the top center, a clamping component 2 is fixedly connected to the top of the base 1 near the center of one side, a rack 102 is symmetrically fixedly connected to the front end of the vertical plate 101 and near the top center, and the rack 102 is located above the cutting component 3 and the spraying component 4, an electric cylinder 103 is symmetrically fixedly connected to the top of the vertical plate 101 and near the two sides, and L-shaped plates 104 are symmetrically fixedly connected to the output ends of the two electric cylinders 103, and the two L-shaped plates 104 are respectively fixedly connected to the cutting component 3 and the spraying component 4.

[0028] The cutting assembly 3 includes an installation box 301, a slide plate 303 is slidably connected to the inner wall of the installation box 301 near the center, an L-shaped block 302 is fixedly connected to the front end of the slide plate 303, a screw rod 304 is rotatably connected to the top of the inner top of the installation box 301 and near one side, and the slide plate 303 is threadedly rotatably connected to the screw rod 304.

[0029] By adopting the above technical solution, the L-shaped block 302 is provided to facilitate the installation of the square plate 305 and the drill body 309. The screw rod 304 is rotated, thereby the slide plate 303 connected by the threaded rotation is lifted and lowered.

[0030] The spraying assembly 4 includes an installation box 401, and a slide plate 402 is slidably connected to the inner wall of the installation box 401 near the center, a screw rod 403 is rotatably connected to the top of the inside of the installation box 401 and near one side, and the slide plate 402 is threadedly rotatably connected to the screw rod 403, the installation box 1 301 and the top of the installation box 2 401 and near the center of one side are both rotatably connected to the gear 105, and the gear 105 is meshed with the rack 102, the top of the screw rod 1 304 penetrates the installation box 1 301 and is fixedly connected to one of the gears 105, the top of the screw rod 2 403 penetrates the installation box 2 401 and is fixedly connected to the other gear 105, the front end of the slide plate 402 is fixedly connected to the support plate 404, the center of the bottom end of the support plate 404 is fixedly connected to the driving slide 405, the bottom end of the driving slide 405 is provided with a connecting frame 406, and the bottom end of the connecting frame 406 is fixedly connected to the nozzle 407.

[0031] By adopting the above technical solution, the second screw rod 403 is rotated, so that the second slide plate 402 connected to the threaded rotation moves horizontally, and the driving slide 405 is operated to achieve the effect of driving the nozzle 407 to move horizontally.

[0032] A square plate 1 305 is provided at the bottom end of the L-shaped block 302, and an electric cylinder 2 306 is fixedly connected to the top of the L-shaped block 302. The output end of the electric cylinder 2 306 passes through the L-shaped block 302 and is fixedly connected to the square plate 1 305. The bottom end of the square plate 1 305 is fixedly connected to a square plate 2 307. The center of the bottom end of the square plate 2 307 is rotatably connected to a drill body 309. The center of the top end of the square plate 2 307 is fixedly connected to a motor 2 308. The output end of the motor 2 308 passes through the square plate 2 307 and is fixedly connected to the drill body 309.

[0033] By adopting the above technical solution, the electric cylinder 2 306 is operated, so that the fixedly connected square plate 1 305 is moved horizontally under the action of the auxiliary shaft, and then the motor 2 308 is operated to rotate the drill body 309 to realize the drilling work.

[0034] The clamping assembly 2 includes a side plate 201, and the bottom end of the side plate 201 is fixedly connected to the base 1, the side end of the side plate 201 is rotatably connected to a fixed groove wheel 202 near the center, the side end of the side plate 201 and near the fixed groove wheel 202 is rotatably connected to a fixed dial 203, and the fixed dial 203 is adapted to the fixed groove wheel 202, and a side end of the side plate 201 away from the fixed groove wheel 202 is fixedly connected to a motor 204, and the output end of the motor 204 passes through the side plate 201 and is fixedly connected to the fixed dial 203.

[0035] By adopting the above technical solution, the motor 1 204 is operated, so that the fixedly connected fixed dial 203 is rotated, and then the fixed groove wheel 202 is driven to rotate intermittently.

[0036] A side end of the side plate 201 away from the fixed dial 203 is rotatably connected to a side shaft 205, and the side end of the side shaft 205 passes through the side plate 201 and is fixedly connected to the fixed groove wheel 202. The outer ring of the side shaft 205 is detachably connected to a plurality of mounting blocks 206. The centers of the two side ends of the mounting blocks 206 are symmetrically fixedly connected to guide telescopic rods 207. One side end of the two guide telescopic rods 207 away from the mounting blocks 206 is symmetrically fixedly connected to an annular clamping plate 209. The side end of the annular clamping plate 209 is fixedly connected to a spring 208, and the other end of the spring 208 is fixedly connected to the mounting block 206. The spring 208 is sleeved on the outer ring of the guide telescopic rod 207.

[0037] By adopting the above technical solution, the guide telescopic rod 207 is provided, and under the cooperation of the spring 208, the two annular clamping plates 209 can be moved horizontally towards each other.

[0038] Working principle: When the device is in use, the anti-slip cover 1 55 and the anti-slip cover 2 57 are provided to prevent the bracket 5 from sliding when supporting the piano stand. The carrying handle 51 is provided to facilitate carrying the bracket 5. The pneumatic telescopic rod 53 is operated, and then the two brackets 5 are forked under the cooperation of the rotating frame 58 and the rotating shaft 52, so as to achieve the effect of lifting the bracket 5 onto the piano stand. When processing the steel pipe, firstly, the steel pipe is sleeved outside the two groups of annular clamping plates 209 on the outer ring of the side shaft 205. Under the cooperation of the spring 208 and the guide telescopic rod 207, the inner wall of the steel pipe can be limited. The mounting block 206 is bolted to the outer ring of the side shaft 205 to facilitate its disassembly and replacement, thereby improving the flexibility of the clamping assembly 2, and further solving the problem that during the spraying process of the raw material steel pipe, the clamping device needs to be used for limiting, but the clamping device will block part of the steel pipe, resulting in the inability to spray; After completing the clamping and limiting work of the steel pipe, one of the electric cylinders 103 can be operated so that the fixedly connected L-shaped plate 104 drives the installation box 301 to move horizontally. When the installation box 301 moves close to the center of the vertical plate 101, under the action of the rack 102, the meshing gear 105 is rotated, so that the fixedly connected screw rod 304 is rotated, thereby making the slide plate 1 303 connected to its threaded rotation drive the L-shaped block 302 to move up and down, so that the installation box 301 moves while the L-shaped block 302 drives the drill body 309 to move downward, and then the motor 2 308 is operated to rotate the fixedly connected drill body 309, thereby completing the drilling work of the steel pipe, and then the cutting assembly 3 is reset and the other electric cylinder 103 is operated. This allows another L-shaped plate 104 to drive the spray assembly 4 to move toward the center of the vertical plate 101. Then, under the action of the rack 102, gear 1 105, screw 2 403, and slide 2 402, the fixedly connected support plate 404 can drive the connecting frame 406 and the nozzle 407 to move downward, and the working drive slide 405 can be operated to achieve the effect of horizontal movement of the nozzle 407, thereby completing the spraying of the steel pipe. At the same time, during spraying, the working motor 1 204 is operated, so that the fixedly connected fixed dial 203 drives the fixed groove wheel 202 to rotate intermittently, thereby allowing the side shaft 205 to drive the steel pipe to rotate intermittently, thereby achieving the work of spraying the steel pipe in full, thereby solving the problem of increasing the production process of the piano frame center axis by transferring the punched piano frame center axis steel pipe to the plastic spraying device for spraying.

[0039] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An infinitely pneumatically lifting piano stand center axis, comprising two brackets (5), characterized in that: A top shaft (54) is fixedly connected to the top of the bracket (5), and the two top shafts (54) are rotatably connected to each other. A rotating shaft (52) is fixedly connected between the inner walls of another bracket (5) and near the center. A pneumatic telescopic rod (53) is rotatably connected to the center of the outer circle of the rotating shaft (52). A rotating frame (58) is rotatably connected between the inner walls of another bracket (5) and near the top, and the other end of the pneumatic telescopic rod (53) is fixedly connected to the rotating frame (58).

2. The stepless air pressure lifting piano stand center axis according to claim 1, characterized in that: The top shaft (54) is symmetrically fixedly connected to an outer ring and near both sides with an anti-slip sleeve (55), a handle (51) is fixedly connected to the center of the side end of one of the brackets (5), the bottom end of the bracket (5) is fixedly connected to a bottom shaft (56), and the bottom shaft (56) is symmetrically fixedly connected to an outer ring and near both sides with an anti-slip sleeve (57).

3. The processing equipment used for the stepless pneumatic lifting piano stand center axis according to any one of claims 1 to 2 comprises a base (1), characterized in that: The back end of the base (1) is fixedly connected to a vertical plate (101), and the front end of the vertical plate (101) is symmetrically slidably connected to a cutting assembly (3) and a spraying assembly (4), and the top of the base (1) is fixedly connected to a clamping assembly (2) near the center of one side, and the front end of the vertical plate (101) is symmetrically fixedly connected to a rack (102), and the rack (102) is located above the cutting assembly (3) and the spraying assembly (4), and the top of the vertical plate (101) is symmetrically fixedly connected to an electric cylinder (103) near both sides, and the output ends of the two electric cylinders (103) are symmetrically fixedly connected to L-shaped plates (104), and the two L-shaped plates (104) are respectively fixedly connected to the cutting assembly (3) and the spraying assembly (4).

4. The processing equipment used for the stepless air pressure lifting piano stand center axis as claimed in claim 3, characterized in that: The cutting assembly (3) comprises an installation box (301), a slide plate (303) is slidably connected to the inner wall of the installation box (301) near the center, an L-shaped block (302) is fixedly connected to the front end of the slide plate (303), a screw rod (304) is rotatably connected to the top of the inner side of the installation box (301), and the slide plate (303) is rotatably connected to the screw rod (304) by a thread.

5. The processing equipment used for the stepless air pressure lifting piano stand center axis as claimed in claim 4, characterized in that: The spraying assembly (4) includes a second installation box (401), the inner wall of the second installation box (401) is slidably connected to a second slide plate (402) near the center, the top of the inside of the second installation box (401) and near one side is rotatably connected to a second screw rod (403), and the second slide plate (402) and the second screw rod (403) are threadedly rotatably connected, the top of the first installation box (301) and the second installation box (401) and near the center of one side are both rotatably connected to a gear (105), and the gear (105) is meshed with the rack (102), the The top end of the screw rod 1 (304) passes through the mounting box 1 (301) and is fixedly connected to one of the gears 1 (105); the top end of the screw rod 2 (403) passes through the mounting box 2 (401) and is fixedly connected to the other gear 1 (105); the front end of the slide plate 2 (402) is fixedly connected to a support plate (404); the center of the bottom end of the support plate (404) is fixedly connected to a driving slide (405); a connecting frame (406) is provided at the bottom end of the driving slide (405); and a nozzle (407) is fixedly connected to the bottom end of the connecting frame (406).

6. The processing equipment used for the stepless air pressure lifting piano stand center axis as claimed in claim 4, characterized in that: A square plate 1 (305) is provided at the bottom end of the L-shaped block (302); an electric cylinder 2 (306) is fixedly connected to the top end of the L-shaped block (302); an output end of the electric cylinder 2 (306) passes through the L-shaped block (302) and is fixedly connected to the square plate 1 (305); a square plate 2 (307) is fixedly connected to the bottom end of the square plate 1 (305); a drill body (309) is rotatably connected at the center of the bottom end of the square plate 2 (307); a motor 2 (308) is fixedly connected to the center of the top end of the square plate 2 (307); an output end of the motor 2 (308) passes through the square plate 2 (307) and is fixedly connected to the drill body (309).

7. The processing equipment used for the stepless air pressure lifting piano stand center axis as claimed in claim 3, characterized in that: The clamping assembly (2) comprises a side plate (201), and the bottom end of the side plate (201) is fixedly connected to the base (1); a side end of the side plate (201) is rotatably connected to a fixed groove wheel (202) near the center; a side end of the side plate (201) is rotatably connected to a fixed groove wheel (202); the side end of the side plate (201) is rotatably connected to a fixed groove wheel (203), and the fixed groove wheel (203) is adapted to the fixed groove wheel (202); a side end of the side plate (201) away from the fixed groove wheel (202) is fixedly connected to a motor 1 (204); and an output end of the motor 1 (204) passes through the side plate (201) and is fixedly connected to the fixed groove wheel (203).

8. The processing equipment used for the stepless air pressure lifting piano stand center axis as claimed in claim 7, characterized in that: The side plate (201) is rotatably connected to a side shaft (205) at one end away from the fixed dial (203), and the side end of the side shaft (205) passes through the side plate (201) and is fixedly connected to the fixed groove wheel (202). The outer ring of the side shaft (205) is detachably connected to a plurality of mounting blocks (206). The centers of both side ends of the mounting blocks (206) are symmetrically fixedly connected to guide telescopic rods (207). The two guide telescopic rods (207) are symmetrically fixedly connected to annular clamping plates (209) at one end away from the mounting blocks (206). The side end of the annular clamping plate (209) is fixedly connected to a spring (208), and the other end of the spring (208) is fixedly connected to the mounting block (206). The spring (208) is sleeved on the outer ring of the guide telescopic rod (207).

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