CN111121430A

CN111121430A - Diamond wire drying device

Info

Publication number: CN111121430A
Application number: CN201911254843.3A
Authority: CN
Inventors: 邱昌萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-05-08

Abstract

The invention relates to a drying device, in particular to a diamond wire drying device. The technical problem is how to design a diamond wire drying device which can dry more diamond wires at the same time and improve the working efficiency. A diamond wire drying device comprises a support frame, a frame body, a hot air fan, a driving mechanism, a pushing mechanism and the like; a frame body is arranged between the top ends of the supporting frames, a hot air fan is arranged between the bottoms of the frame bodies, a driving mechanism is arranged between the front side face and the rear side face outside the frame body, a pushing mechanism capable of enabling the diamond wires to move is arranged in the frame body, and the pushing mechanism is matched with the driving mechanism. According to the diamond wire drying machine, diamond wires penetrate through the opening, the cover plate is pushed, the guide roller can be in contact with the diamond wires to enable the diamond wires to move downwards, more diamond wires move into the frame body, the hot air fan is started, the diamond wires can be dried, and therefore the working efficiency is improved.

Description

Diamond wire drying device

Technical Field

The invention relates to a drying device, in particular to a diamond wire drying device.

Background

The diamond wire saw is also called as a diamond wire, and refers to a method of fixing a diamond abrasive on a metal wire by using an electroplating process or a resin bonding method, wherein sanding is required in the manufacturing of the diamond wire, but after sanding, the diamond wire needs to be dried so that the diamond wire can be subjected to the next operation treatment.

The prior diamond wire drying device, such as chinese patent with patent publication No. CN207945940U, discloses a drying oven of diamond wire production equipment, which comprises a box body, an upper cover and a metal heat dissipation plate; the heat dissipation plate is embedded in the box body and is flush with the top surface of the box body; the upper cover is hinged with the box body and can cover the top surface of the box body; the center of the heat dissipation plate is provided with a groove part for the diamond wire to pass through; the width of the groove part is not more than 5 cm; the heat dissipation plate is uniformly provided with air holes communicated with the interior of the box body; the inside a plurality of heating wires that are equipped with of box, the heating wire with the heating panel contact does not, and above-mentioned patent exists following not enoughly: when the diamond wires are dried, the diamond wires are dried through a machine, but due to the design of the drying machine, only a part of the diamond wires can be dried at each time, so that the working efficiency is low.

Therefore, a diamond wire drying device which can dry more diamond wires at the same time and improve the working efficiency is particularly needed to solve the problems in the prior art.

Disclosure of Invention

In order to overcome because the design of drying machine, can only dry to a part diamond wire at every turn, so lead to the shortcoming that work efficiency is low, technical problem: the diamond wire drying device can dry more diamond wires at the same time, and improves the working efficiency.

The utility model provides a buddha's warrior attendant line drying device, including: the supporting frame is provided with a frame body, the bottom of the frame body is arranged in an open manner, openings through which the diamond wires can pass are formed in two sides of the frame body far away from the supporting frame, at least three rolling shafts are rotatably arranged between the inner walls of the frame body far away from the supporting frame, and the hot air fan is arranged on one side of the frame body close to the supporting frame; the driving mechanism is arranged on the outer wall of the frame body and matched with the frame body; and the pushing mechanism is arranged on the inner wall of the frame body close to the rolling shaft, is matched with the rolling shaft and is also connected and matched with the driving mechanism.

Optionally, the moving mechanism includes a cover plate, movable rods, a fixed plate and guide sleeves, the number of the guide sleeves is at least eight, the guide sleeves are respectively installed on the outer wall of the frame body facing the roller, the movable rods are slidably connected between the guide sleeves on the upper side and the lower side in a penetrating manner, the cover plate matched with the frame body is installed between the top ends of the four movable rods, through holes are circumferentially distributed at intervals on two sides of the cover plate, the through holes on the two sides are arranged into a circle, the end portion of each movable rod facing the support frame is fixedly connected with the fixed plate, and the fixed.

Optionally, pushing mechanism is including guide roll, slider, gear, connecting rod, rack and contact piece, it has two spouts to all vertically open towards the framework both sides of roller tip, the slider slidingtype is placed in the spout, be connected with the guide roll of slider one side rotary type near the roller bearing, the guide roll sets up with the roller bearing is crisscross, the guide roll is close to the tip both sides of roller bearing all the rigid coupling has the gear, the fixed plate one side of keeping away from the support frame is connected with the connecting rod, the connecting rod is located the framework, and its tip rigid coupling towards the guide roll has the rack, rack and gear engagement, the rack all the rigid coupling has contact piece towards one side both ends of guide roll, contact piece and slider cooperation.

Optionally, the material collecting device further comprises a blocking mechanism, the blocking mechanism comprises a swinging plate capable of collecting materials, a guide sleeve, a sliding rod, a baffle, a first spring, a sliding block and a second spring with a resetting function, the guide sleeve is symmetrically and fixedly connected to two sides of the inner wall of the frame body close to the opening, the sliding rod is slidably connected in the guide sleeve in a penetrating manner, the first spring is wound between the end part of the sliding rod far away from the support frame and the guide sleeve, the baffle is installed between the end parts of every two adjacent sliding rods facing the support frame, arc-shaped grooves are formed in two sides of the frame body far away from the cover plate, the sliding block is slidably placed in the arc-shaped grooves, the second spring is connected between one side of the sliding block and the arc-shaped grooves, the swinging plate is installed between the inner walls of the two sliding blocks, the end part of the swinging plate far away from the sliding block, and a discharge port is formed in one side of the frame body away from the sliding block and is matched with the baffle.

Optionally, still including hollow rotating shaft, T type pole, inserted bar, fly leaf and third spring, hollow rotating shaft rotary type cross-under in apron centre of a circle position, its bottom is connected with the third spring, the slidingtype placing of T type pole is in hollow rotating shaft, just T type pole towards the tip and the third spring end connection of hollow rotating shaft, the both ends of T type pole all the rigid coupling have the inserted bar, with inserted bar complex jack interval distribution in on the apron, be a plurality of with through-hole complex fly leaf quantity, interval distribution in hollow rotating shaft is towards the tip of framework.

Optionally, still including u template, fourth spring and pull rod, keeping away from slidingtype being equipped with u template between the framework both sides of arc wall, fourth spring coupling with u template towards one side of framework, its tail end with framework outer wall connection, the pull rod is installed in the u template one side of keeping away from the framework, the draw-in groove has all been opened to both sides about keeping away from the movable rod of arc wall, the draw-in groove with the cooperation of u template tip.

According to the diamond wire drying device, diamond wires penetrate through the opening, the cover plate is pushed, the guide roller can be in contact with the diamond wires to enable the diamond wires to move downwards, more diamond wires are moved into the frame body, the hot air fan is started, and the diamond wires can be dried, so that the working efficiency is improved.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

FIG. 3 is a schematic view of a first partial body structure according to the present invention.

FIG. 4 is a schematic view of a second partial body structure according to the present invention.

Fig. 5 is an enlarged schematic view of part a of the present invention.

The meaning of the reference symbols in the figures: 1. the automatic feeding device comprises a support frame, a frame body, an opening, a roller, a hot air fan, a driving mechanism, a cover plate, a through hole, a through rod, a movable rod, a fixing plate, a guide sleeve, a pushing mechanism, a guide roller, a sliding groove, a sliding block, a gear, a connecting rod, a rack, a contact block, a blocking mechanism, a swinging plate, a guide sleeve, a sliding rod, a baffle, a first spring, an arc-shaped groove, a sliding block, a second spring, a discharging port, a hollow rotating shaft, a T-shaped rod, an inserting rod, a plug 12 inserting hole, a movable plate, a 14 third spring, a clamping groove, a 16 u-shaped plate, a fourth spring, and a pull rod, wherein the rotating shaft is 2, the through hole, the movable rod.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Example 1

Referring to fig. 1-4, a diamond wire drying device comprises a support frame 1, a frame body 2, rolling shafts 4, a hot air fan 5, a driving mechanism 6 and a pushing mechanism 7, wherein the frame body 2 is installed between the top ends of the support frame 1, the hot air fan 5 is installed between the bottoms of the frame body 2, the driving mechanism 6 is arranged between the front side surface and the rear side surface of the frame body 2, the pushing mechanism 7 capable of moving diamond wires is arranged in the frame body 2, the pushing mechanism 7 is matched with the driving mechanism 6, openings 3 are formed in the upper portions of the left side and the right side of the frame body 2, the rolling shafts 4 are installed on the front side surface and the rear side surface of the frame body.

The driving mechanism 6 comprises a cover plate 61, movable rods 63, fixing plates 64 and guide sleeves 65, the guide sleeves 65 are symmetrically arranged on the upper side and the lower side of the front side face and the lower side face of the outer side face of the frame body 2, the movable rods 63 are arranged in the guide sleeves 65 in a sliding mode, the fixing plates 64 are fixedly connected to the bottom ends of the movable rods 63, the top of each fixing plate 64 is matched with the corresponding pushing mechanism 7, the cover plate 61 is fixedly connected between the top ends of the four movable rods 63, the cover plate 61 is matched with the frame body 2, and through holes 62 are uniformly.

The pushing mechanism 7 comprises a guide roller 71, a sliding block 73, a gear 74, a connecting rod 75, a rack 76 and a contact block 77, sliding grooves 72 are formed in the left and right parts of the front and back sides of the frame body 2, the sliding block 73 is arranged in the sliding grooves 72 in a sliding manner, the guide roller 71 capable of moving the diamond wires is hinged to the inner side of the sliding block 73, the guide roller 71 and the rolling shaft 4 are arranged in a staggered manner, the gear 74 is fixedly connected to the lower parts of the left and right sides of the guide roller 71, the gear 74 is located in the frame body 2, the connecting rods 75 are symmetrically arranged on the inner side of the top of the fixing plate 64, the rack 76 is fixedly connected to the top end of the connecting rod 75, the rack 76 is located on.

Firstly, an operator penetrates the head end of a diamond wire into the frame body 2 from the left opening 3 and then penetrates the right opening 3, the diamond wire is in contact with the roller 4, the driving mechanism 6 can be pushed to move downwards, the driving mechanism 6 moves downwards to drive the pushing mechanism 7 to operate, the pushing mechanism 7 operates to be in contact with the diamond wire, the driving mechanism 6 continues to be pushed to operate downwards, when the driving mechanism 6 is matched with the frame body 2, the pushing mechanism 7 also pushes the diamond wire to move downwards to be in a W shape, the diamond wire moving into the frame body 2 is longer, the driving mechanism 6 is stopped to be pushed, the hot air fan 5 is started, the hot air fan 5 dries the diamond wire, the operator can continue to drive the diamond wire to move through a machine, the roller 4 and the pushing mechanism 7 guide the diamond wire, and the hot air fan 5 comprehensively dries the diamond wire. When the diamond wire is completely dried and separated from the opening 3, the hot air fan 5 is closed, the driving mechanism 6 is pulled to move upwards for resetting, and then the pushing mechanism 7 is driven to move upwards for resetting. Thus, longer diamond wires can be dried at the same time.

When the diamond wire passes through the frame body 2, an operator can push the cover plate 61 to move downwards, the cover plate 61 moves downwards to drive the movable rod 63 to move downwards, the movable rod 63 moves downwards to drive the fixed plate 64 to move downwards, the fixed plate 64 moves downwards to drive the pushing mechanism 7 to operate, the pushing mechanism 7 operates to move more diamond wires into the frame body 2, and then when the cover plate 61 moves downwards to be matched with the frame body 2, the cover plate 61 stops being pushed, the pushing mechanism 7 also stops operating, and the diamond wires can be dried. After the diamond wire is dried and moves to the outside of the frame body 2, the operator can pull the cover plate 61 to move upwards to drive the movable rod 63 to move upwards, and further drive the pushing mechanism 7 to operate and reset.

When the operator pushes the cover plate 61 to move downwards, the fixing plate 64 moves downwards to drive the connecting rod 75 to move downwards, the connecting rod 75 moves downwards to drive the rack 76 to move downwards, the rack 76 moves downwards to drive the contact block 77 to move downwards, further, the gear rack 76 moves downwards to drive the gear 74 to rotate inwards, the gear 74 rotates inwards to drive the guide roller 71 to swing downwards, the guide roller 71 swings downwards to be in contact with the diamond wire, the cover plate 61 is continuously pushed to move downwards, when the contact block 77 moves downwards to be in contact with the slide block 73, the contact block 77 drives the slide block 73 to move downwards, the slide block 73 moves downwards to drive the guide roller 71 to move downwards, the guide roller 71 moves downwards to drive the diamond wire to move downwards, when the cover plate 61 is in contact fit with the frame body 2, the guide roller 71 stops moving, the diamond wires are wound on the rolling shaft 4 and the guide roller 71 to form a W shape, and the guide roller 71 enables more diamond wires to be placed in the frame body 2 for drying. When the diamond wires move, the guide rollers 71 guide the diamond wires, after the diamond wires are all dried, an operator pulls the cover plate 61 to move upwards, then the fixing plate 64 moves upwards to drive the racks 76 to move upwards through the connecting rods 75, the racks 76 move upwards to drive the contact blocks 77 to move upwards, the contact blocks 77 move upwards to drive the sliders 73 to move upwards, the sliders 73 move upwards to drive the guide rollers 71 to move upwards, when the sliders 73 move upwards to the maximum stroke, the sliders 73 stop moving upwards, the racks 76 continue moving upwards to drive the gears 74 to rotate outwards, and the gears 74 rotate outwards to drive the guide rollers 71 to swing upwards to reset.

Example 2

Referring to fig. 2-4, the present embodiment is different from embodiment 1 mainly in that the present embodiment further includes a blocking mechanism 8, the blocking mechanism 8 includes a swing plate 81, a guide sleeve 82, a slide rod 83, a baffle 84, a first spring 85, a slide block 87, and a second spring 88, the left sides of the lower portions of the front and rear sides of the frame 2 are both provided with an arc-shaped groove 86, the slide block 87 is slidably arranged in the arc-shaped groove 86, the second spring 88 is connected between the bottom of the slide block 87, the swing plate 81 is fixedly connected between the inner side surfaces of the slide blocks 87, the swing plate 81 is net-shaped, the right end of the swing plate 81 is hinged to the lower portion of the right side of the inner wall of the frame 2, the guide sleeve 82 is symmetrically installed on the upper portions of the left and right sides of the frame 2, the slide rod 83 is slidably arranged in the guide sleeve 82, the baffle 84 is, a first spring 85 is wound between the top of the guide sleeve 82 and the top of the slide rod 83, and a discharge port 89 for discharging materials is arranged at the lower part of the right side of the frame body 2.

Initially, the second spring 88 is in a stretched state, when an operator pushes the cover plate 61 to move downward, the cover plate 61 contacts the sliding rod 83, the cover plate 61 drives the sliding rod 83 to move downward, the first spring 85 compresses, the sliding rod 83 moves downward to drive the baffle 84 to move downward, the left baffle 84 moves downward to separate from the swinging plate 81, the swinging plate 81 swings downward to be in a horizontal state under the action of the second spring 88, when the cover plate 61 is in contact fit with the frame body 2, the baffle 84 stops moving, the right baffle 84 blocks the discharge hole 89, hot air blown by the hot air fan 5 dries the diamond wires through the swinging plate 81, and unadsorbed materials on the diamond wires drop onto the swinging plate 81. After the diamond wires are all dried, an operator pulls the cover plate 61 to move upwards for resetting, the cover plate 61 is not in contact with the sliding rod 83, the sliding rod 83 moves upwards to drive the baffle plate 84 to move upwards for resetting under the action of the first spring 85, the right baffle plate 84 moves upwards for resetting without blocking the discharge hole 89, meanwhile, the left baffle plate 84 moves upwards to drive the left end of the swinging plate 81 to swing upwards, the second spring 88 stretches, the left end of the swinging plate 81 swings upwards in an inclined mode, and materials on the swinging plate 81 fall out through the discharge hole 89. Thus, the material can be prevented from falling into the hot air fan 5 to affect the operation thereof.

Example 3

Referring to fig. 1, 2, 4 and 5, the present embodiment is different from embodiment 1 and embodiment 2 mainly in that the present embodiment further includes a hollow rotating shaft 9, a T-shaped rod 10, an inserting rod 11, a movable plate 13 and a third spring 14, the hollow rotating shaft 9 is rotatably connected to the middle portions of the left and right sides of the cover plate 61, the T-shaped rod 10 is slidably arranged in the hollow rotating shaft 9, the third spring 14 is connected between the bottom end of the T-shaped rod 10 and the bottom portion of the hollow rotating shaft 9, the inserting rods 11 are fixedly connected to the front and rear ends of the T-shaped rod 10, the inserting holes 12 are uniformly spaced on the left and right sides of the top of the cover plate 61, the inserting rods 11 are located in the inserting holes 12 and are matched with the inserting rods, the movable plate 13 is fixedly connected to the bottom end.

The U-shaped plate is further included 16, a fourth spring 17 and a pull rod 18, the U-shaped plate 16 is arranged between the upper portions of the front side face and the lower side face of the frame body 2 in a sliding mode, the fourth spring 17 is connected between the front side face and the rear side face of the front side face in the U-shaped plate 16 and the outer right side face of the frame body 2, the pull rod 18 is installed in the middle of the outer right side face of the U-shaped plate 16, clamping grooves 15 are formed in the upper side face and the lower side face of the right side of the movable rod 63.

Firstly, an operator pulls the T-shaped rod 10 to move upwards according to the requirement, the third spring 14 is stretched, the T-shaped rod 10 moves upwards to drive the inserted link 11 to move upwards, the inserted link 11 moves upwards to be separated from the jack 12, the T-shaped rod 10 can be pulled to rotate, the T-shaped rod 10 rotates to drive the hollow rotating shaft 9 to rotate through the third spring 14, the hollow rotating shaft 9 rotates to drive the movable plate 13 to rotate, the movable plate 13 rotates to shield a part of the through hole 62, when the movable plate 13 rotates to a proper position, the T-shaped rod 10 stops being pulled to rotate, the T-shaped rod 10 is released, the T-shaped rod 10 moves downwards under the action of the third spring 14 to drive the inserting rod 11 to move downwards, the inserting rod 11 moves downwards to be inserted into the inserting hole 12 to fix the movable plate 13, when the hot air fan 5 dries the diamond wire, the hot air in the frame 2 will flow out through the through hole 62, and the hot air cannot flow out quickly because the movable plate 13 blocks part of the through hole 62. Therefore, the diamond wire can be better dried.

Firstly, an operator pulls the pull rod 18 to move rightwards, the pull rod 18 moves rightwards to drive the u-shaped plate 16 to move rightwards, the fourth spring 17 stretches, the u-shaped plate 16 moves rightwards to be separated from the lower clamping groove 15, the cover plate 61 can be pushed to move downwards, the pull rod 18 can be released when the cover plate 61 is in contact fit with the frame body 2, and due to the action of the fourth spring 17, the u-shaped plate 16 moves leftwards to be inserted into the upper clamping groove 15 to fix the movable rod 63, and the cover plate 61 is fixed. After the diamond wire is dried, the pull rod 18 is pulled again to move rightwards, so that the u-shaped plate 16 moves rightwards to be separated from the upper clamping groove 15, the cover plate 61 is pulled to move upwards to reset, and the pull rod 18 is loosened, so that the u-shaped plate 16 moves leftwards to be inserted into the lower clamping groove 15. Thus, the cover plate 61 can be limited.

While the disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Accordingly, the scope of the present disclosure should not be limited to the above-described embodiments, but should be defined not only by the appended claims, but also by equivalents thereof.

Claims

1. The utility model provides a buddha's warrior attendant line drying device which characterized in that, including:

the supporting frame (1) is provided with a frame body (2), the bottom of the frame body (2) is arranged in an open manner, openings (3) which can enable diamond wires to pass through are formed in two sides of the frame body (2) far away from the supporting frame (1), the number of the rolling shafts (4) is at least three, the rolling shafts are rotatably arranged between the inner walls of the frame body (2) far away from the supporting frame (1), and the hot air fan (5) is arranged on one side of the frame body (2) close to the supporting frame (1);

the driving mechanism (6) is arranged on the outer wall of the frame body (2), and the driving mechanism (6) is matched with the frame body (2);

pushing mechanism (7), install in framework (2) inner wall near roller bearing (4), pushing mechanism (7) and roller bearing (4) cooperation, just pushing mechanism (7) still are connected the cooperation with actuating mechanism (6).

2. A diamond wire drying device according to claim 1, characterized in that: actuating mechanism (6) are including apron (61), movable rod (63), fixed plate (64) and guide pin bushing (65), the quantity of guide pin bushing (65) is eight at least, installs respectively in framework (2) outer wall towards roller bearing (4), the cross-under of movable rod (63) slidingtype is between upper and lower both sides guide pin bushing (65), install between four movable rod (63) tops with framework (2) complex apron (61), apron (61) both sides circumference interval distribution has through-hole (62), both sides through-hole (62) are arranged into circularly, movable rod (63) have fixed plate (64) towards the tip rigid coupling of support frame (1), fixed plate (64) are connected the cooperation with pushing mechanism (7).

3. A diamond wire drying device according to claim 2, characterized in that: pushing mechanism (7) is including guide roll (71), slider (73), gear (74), connecting rod (75), rack (76) and contact piece (77), all vertical division has two spout (72) towards framework (2) both sides of roller bearing (4) tip, slider (73) slidingtype is placed in spout (72), be connected with guide roll (71) of slider (73) one side rotary type that is close to roller bearing (4), guide roll (71) and roller bearing (4) crisscross the setting, guide roll (71) are close to the tip both sides of roller bearing (4) all the rigid coupling have gear (74), fixed plate (64) one side of keeping away from support frame (1) is connected with connecting rod (75), connecting rod (75) are located framework (2), and its tip rigid coupling towards guide roll (71) has rack (76), rack (76) and gear (74) meshing, and both ends of one side of the rack (76) facing the guide roller (71) are fixedly connected with contact blocks (77), and the contact blocks (77) are matched with the sliding blocks (73).

4. A diamond wire drying device according to claim 3, characterized in that: the material collecting device is characterized by further comprising a blocking mechanism (8), wherein the blocking mechanism (8) comprises a swinging plate (81) capable of collecting materials, a guide sleeve (82), a sliding rod (83), a baffle (84), a first spring (85), a sliding block (87) and a second spring (88) with a resetting effect, the guide sleeve (82) is symmetrically fixedly connected to two sides of the inner wall of the frame body (2) close to the opening (3), the sliding rod (83) is in penetrating connection with the guide sleeve (82) in a sliding manner, the first spring (85) is wound between the end part of the sliding rod (83) far away from the support frame (1) and the guide sleeve (82), the baffle (84) is installed between the end parts of every two adjacent sliding rods (83) facing the support frame (1), arc-shaped grooves (86) are formed in two sides of the frame body (2) far away from the cover plate (61), and the sliding block (87) is placed in the arc-shaped grooves (86, be connected with second spring (88) between its one side and arc wall (86), swing board (81) are installed between two sliding block (87) inner walls, and keep away from swing board (81) tip of sliding block (87) with frame body (2) keep away from one side articulated connection of apron (61), swing board (81) still cooperate with baffle (84), it has discharge gate (89) to keep away from frame body (2) one side of sliding block (87), discharge gate (89) and baffle (84) cooperation.

5. A diamond wire drying device according to claim 4, characterized in that: still including hollow pivot (9), T type pole (10), inserted bar (11), fly leaf (13) and third spring (14), hollow pivot (9) rotary type cross-under in apron (61) centre of a circle position, its bottom is connected with third spring (14), place in hollow pivot (9) of T type pole (10) slidingtype, just T type pole (10) towards the tip and the third spring (14) end connection of hollow pivot (9), the both ends all rigid coupling of T type pole (10) have inserted bar (11), with inserted bar (11) complex jack (12) interval distribution in on apron (61), be a plurality of with through-hole (62) complex fly leaf (13) quantity, interval distribution in hollow pivot (9) are towards the tip of framework (2).

6. A diamond wire drying device according to claim 5, characterized in that: still including u template (16), fourth spring (17) and pull rod (18), keep away from between framework (2) both sides of arc wall (86) slidingtype be equipped with u template (16), fourth spring (17) connect with u template (16) are towards one side of framework (2), its tail end with framework (2) outer wall connection, pull rod (18) are installed in u template (16) one side of keeping away from framework (2), draw-in groove (15) have all been opened to both sides about keeping away from movable rod (63) of arc wall (86), draw-in groove (15) with u template (16) tip cooperation.