CN111642784B

CN111642784B - Tobacco leaf filament cutter

Info

Publication number: CN111642784B
Application number: CN202010471219.5A
Authority: CN
Inventors: 肖锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2022-07-22
Anticipated expiration: 2040-05-29
Also published as: CN111642784A

Abstract

The invention relates to a tobacco cutter, in particular to a tobacco cutter. The technical problem of the invention is as follows: the tobacco leaf filament cutter can automatically cut tobacco leaves, enables the tobacco leaves to automatically move to the lower side of a cutting knife, and is convenient for manually collecting tobacco leaves. The technical scheme of the invention is as follows: a tobacco leaf filament cutter comprising: the cutting device comprises a base, a cutter and a cutter, wherein a motor is arranged on the side part of the base, and a cutting mechanism is arranged on the front side of the base and connected with the motor; automatic material conveying mechanism, the base left side is equipped with automatic material conveying mechanism. According to the automatic tobacco leaf cutting device, the automatic cutting of tobacco leaves is achieved through the cutting mechanism, the tobacco leaves do not need to be cut manually through the cutting knife, meanwhile, the cut tobacco leaves are collected through the collecting box, the intermittent movement of the tobacco leaves is achieved through the automatic feeding mechanism, the tobacco leaves are enabled to automatically move to the position below the cutting knife, the cutting knife is convenient to cut, the rolled tobacco leaves are clamped through the clamping mechanism, and the rolled tobacco leaves are prevented from being scattered in the cutting process.

Description

Tobacco leaf filament cutter

Technical Field

The invention relates to a tobacco cutter, in particular to a tobacco cutter.

Background

At present, the cigarette variety is various, the operation of smoking is also very convenient, however, because of using the pipe to smoke harm that produces the human body is littleer, many people select to use the pipe to smoke, but the preparation of pipe tobacco is too loaded down with trivial details, the workman will cut into the pipe tobacco earlier, when cutting the tobacco leaf, the workman rolls up the tobacco leaf and fills in the round hole of cutting board, the workman uses the cutting knife constantly to cut the tobacco leaf on one side, on one side hand pass over the tobacco leaf gradually, this kind of mode of cutting the tobacco leaf, need the workman at the in-process of constantly cutting the tobacco leaf, pass over the tobacco leaf, the workman needs both hands synchro operation.

There is the manual work in the mode of above-mentioned manual cutting tobacco leaf to constantly cut the tobacco leaf to need the manual work to pass the tobacco leaf to the cutter below, the too frequent shortcoming of manual operation, so need research and develop one kind can cut the tobacco leaf automatically, make tobacco leaf automatically move, the manual work of being convenient for carries out the tobacco leaf filament cutter of collecting to the pipe tobacco.

Disclosure of Invention

In order to overcome the defects that the tobacco leaves need to be cut continuously by manpower in a mode of manually cutting the tobacco leaves, and meanwhile, the tobacco leaves need to be transferred below a cutting knife manually, and the manual operation is too much, the invention has the technical problems that: the tobacco leaf filament cutter can automatically cut tobacco leaves, enables the tobacco leaves to automatically move to the position below a cutting knife, and is convenient for manually collecting tobacco shreds.

The technical implementation scheme of the invention is as follows: a tobacco leaf filament cutter comprising:

the cutting device comprises a base, a cutter and a cutter, wherein a motor is arranged on the side part of the base, and a cutting mechanism is arranged on the front side of the base and connected with the motor;

automatic send material mechanism, the base left side is equipped with automatic material mechanism of passing, and automatic material mechanism of passing is connected with cutting mechanism.

As a preferable technical solution of the present invention, the cutting mechanism includes:

the transmission shaft is mounted on an output shaft of the motor, a first supporting rod is arranged on the front side of the base close to one side of the motor, and the lower part of the first supporting rod is rotatably connected with a first rotating shaft;

the bevel gear component is arranged between the side part of the transmission shaft far away from the motor and the rear side of the first rotating shaft, the front side of the upper part of the first supporting rod is rotatably provided with a second rotating shaft, and a first belt component is connected between the side part of the second rotating shaft close to one side of the first supporting rod and the side part of the first rotating shaft close to the side part of the second rotating shaft;

the rotating rod is arranged at the front end of the second rotating shaft, at least two second supporting rods are arranged on the side part of the base close to one side of the rotating rod, and a sliding rail is rotatably arranged between the upper parts of the second supporting rods;

the sliding groove is formed in the sliding rail, the front end of the rotating rod is slidably positioned in the sliding groove, and a cutting knife for cutting tobacco leaves is installed on the lower portion, away from one side of the second supporting rod, of the sliding rail through a bolt;

go out the work or material rest, its connection is at the part top of being close to the automatic mechanism of delivering of cutting knife one side, and the collecting box of collecting the pipe tobacco is placed to the base front side, and the collecting box is located under the cutting knife.

As a preferred technical scheme of the invention, the automatic material conveying mechanism comprises:

the rear part of the base, which is close to one side of the motor, of the third supporting rod is provided with the third supporting rod, the left side of the transmission shaft is rotatably positioned at the lower part of the third supporting rod, and the upper part of the third supporting rod is rotatably provided with a transmission rod;

the second belt assembly is arranged between the transmission rod and the side part of the transmission shaft close to one side of the third support rod, and the tail end of the transmission rod is rotatably provided with a cross rod;

the upper part of the fourth supporting rod is rotatably connected with a short shaft, the short shaft is provided with a swing rod, and the upper end of the swing rod is rotatably connected with the rear end of the cross rod;

the disc is arranged on the side part of the short shaft far away from the motor, the upper part of the side wall of the disc close to one side of the fourth supporting rod is provided with a top block and a spring plate, the spring plate is positioned on the front side of the top block, and the spring plate is in contact with the top block;

the cutting bed, the base lateral part that is close to cutting knife one side is provided with the cutting bed, and the cutting bed front side is connected with the play work or material rest, and the equal rotary type in both sides is equipped with the fortune material pivot around being equipped with the conveyer belt around the fortune material pivot of both sides, and the fortune material pivot lateral part that is close to disc one side is provided with interior ratchet, and the circular slot has been seted up to interior ratchet right part, and the disc rotary type is located the circular slot, kicking block and interior ratchet cooperation.

As a preferred technical solution of the present invention, the present invention further includes a clamping mechanism, and the clamping mechanism includes:

the cutting bed front side is equipped with the mount, and the mount is located a work or material rest rear side, and mount upper portion slidingtype is equipped with two piece at least dead levers, and the grip block is installed to the dead lever bottom, is provided with first spring between grip block top and the mount bottom, and first spring is around establishing on the dead lever, and the threaded rod is installed to mount upper portion rotary type, and the threaded rod is located between the dead lever, threaded rod bottom and grip block contact.

As a preferable technical solution of the present invention, the present invention further includes a support mechanism, the support mechanism including:

the backup pad is installed to cutting bed antetheca rotary type, and the backup pad is located the collecting box top, and the bar groove has all been seted up to the backup pad top left and right sides, and the square groove has all been seted up to backup pad left and right sides wall front portion, square groove and bar groove UNICOM, and the equal slidingtype of backup pad left and right sides is equipped with the T-shaped piece, and the slidingtype of T-shaped piece is located bar groove and square groove, is provided with the second spring between the T-shaped piece lower part inner wall of both sides and the backup pad inner wall.

The invention has the following advantages: 1. through cutting mechanism, realize the automatic cutout to the tobacco leaf, need not the manual work and use the cutting knife cutting tobacco leaf, reduce manual operation, simultaneously, through the collecting box, collect the pipe tobacco of cutting good.

2. Through passing the material mechanism automatically, realize the intermittent type nature removal of tobacco leaf, make tobacco leaf automatically move to the cutting knife below, the cutting knife of being convenient for cuts.

3. Through clamping mechanism, will roll up the tobacco leaf and press from both sides tightly, prevent the cutting process in, the tobacco leaf that rolls up scatters, does benefit to shredding the tobacco leaf.

4. Through supporting mechanism, in the cutting process, play the supporting role to the tobacco leaf, the cutting knife of being convenient for cuts the tobacco leaf.

Drawings

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

Fig. 2 is a schematic perspective view of the motor, the cutting mechanism and the automatic material delivery mechanism of the present invention.

FIG. 3 is a schematic perspective view of a part of the automatic feeding mechanism of the present invention.

Fig. 4 is a schematic perspective view of a portion of the automatic material delivery mechanism, the collection box, the discharge rack, and the clamping mechanism of the present invention.

Fig. 5 is a schematic perspective view of a part of the cutting mechanism and the supporting mechanism of the present invention.

Fig. 6 is a schematic separated perspective view of the supporting mechanism of the present invention.

Wherein: 1 base, 2 motors, 3 cutting mechanisms, 31 transmission shafts, 32 bevel gear assemblies, 33 first supporting rods, 34 first rotating shafts, 35 second rotating shafts, 36 first belt assemblies, 37 rotating rods, 38 second supporting rods, 39 sliding rails, 310 sliding grooves, 311 cutting knives, 312 bolts, 313 discharging racks, 314 collecting boxes, 4 automatic material conveying mechanisms, 41 third supporting rods, 42 transmission rods, 43 second belt assemblies, 44 transverse rods, 45 swinging rods, 46 fourth supporting rods, 47 short shafts, 48 circular disks, 49 top blocks, 410 spring plates, 411 inner ratchets, 412 circular grooves, 413 material conveying rotating shafts, 414 cutting tables, 415 conveying belts, 5 clamping mechanisms, 51 fixing frames, 52 fixing rods, 53 clamping plates, 54 first springs, 55 threaded rods, 6 supporting mechanisms, 61 supporting plates, 62T blocks, 63 strip-shaped grooves, 64 square grooves and 65 second springs.

Detailed Description

It is to be noted that, in the case of the different described embodiments, identical components are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to identical components having the same reference numerals or the same component names in a meaningful manner. The positional references selected in the description, such as upper, lower, lateral, etc., refer also to the directly described and illustrated figures and are to be read into the new position in the sense of a change in position.

Example 1

The utility model provides a tobacco leaf filament cutter, as shown in figure 1, including base 1, motor 2, cutting mechanism 3 and automatic material mechanism 4 of passing, motor 2 is installed at base 1 right side rear portion, and base 1 front side is equipped with cutting mechanism 3, and cutting mechanism 3 is connected with motor 2, and base 1 left side is provided with automatic material mechanism 4 of passing, and automatic material mechanism 4 of passing is connected with cutting mechanism 3.

When the tobacco leaves need to be cut into shreds, the tobacco leaves are rolled up and placed into the parts of the cutting mechanism 3, then the motor 2 is started, the motor 2 drives the cutting parts of the cutting mechanism 3 to do up-and-down reciprocating swing motion, meanwhile, the motor 2 drives the parts of the intermittent feeding mechanism to operate, the tobacco leaves intermittently move forwards, when the tobacco leaves move forwards, the cutting parts of the cutting mechanism 3 are lifted upwards, when the tobacco leaves stop moving, the cutting parts of the cutting mechanism 3 move downwards to cut the tobacco leaves, automation of tobacco leaf cutting is achieved, and the tobacco leaves do not need to be cut manually.

Example 2

Specifically, as shown in fig. 1-3, the cutting mechanism 3 includes a transmission shaft 31, a bevel gear assembly 32, a first support bar 33, a first rotation shaft 34, a second rotation shaft 35, a first belt assembly 36, a rotation rod 37, a second support bar 38, a slide rail 39, a cutting knife 311, a bolt 312, a discharge frame 313 and a collection box 314, the transmission shaft 31 is connected to an output shaft of the motor 2, the first support bar 33 is disposed on the front portion of the right side of the base 1, the first rotation shaft 34 is rotatably mounted on the lower portion of the first support bar 33, the bevel gear assembly 32 is disposed between the rear side of the first rotation shaft 34 and the left side of the transmission shaft 31, the second rotation shaft 35 is rotatably mounted on the front side of the upper portion of the first support bar 33, the first belt assembly 36 is connected between the rear side of the second rotation shaft 35 and the front side of the first rotation shaft 34, the rotation rod 37 is disposed on the front end of the second rotation shaft 35, two second support bars 38 are mounted on the front side of the right side of the base 1, the slide rail 39 is rotatably mounted between the upper portions of the second support bars 38, the sliding groove 310 is formed in the sliding rail 39, the front end of the rotating rod 37 is slidably located in the sliding groove 310, the lower portion of the left side of the sliding rail 39 is connected with a cutting knife 311 through a bolt 312, a discharging frame 313 is installed on the front side of the top of a component of the automatic material conveying mechanism 4, and a collecting box 314 is placed on the front side of the left side of the base 1.

The tobacco leaves are rolled up and placed into a discharge frame 313, then a motor 2 is started, an output shaft of the motor 2 drives a transmission shaft 31 to rotate clockwise, the transmission shaft 31 drives a first rotating shaft 34 to rotate clockwise through a bevel gear component 32, the first rotating shaft 34 drives a second rotating shaft 35 to rotate through a first belt component 36, the second rotating shaft 35 drives a rotating rod 37 to rotate, the rotating rod 37 drives a sliding rail 39 to swing up and down in a reciprocating mode, the sliding rail 39 drives a cutting knife 311 to swing up and down in a reciprocating mode, meanwhile, the transmission shaft 31 drives the tobacco leaves to move forward intermittently, when the tobacco leaves move forward, the cutting knife 311 swings up, when the tobacco leaves stop moving, the tobacco leaves are moved down by the cutting knife 311 to be cut, the tobacco leaves are cut into shreds along with the tobacco leaves, the cut tobacco shreds are moved down into a collecting box 314, and in the process that the cutting knife 311 reciprocates up and down, the tobacco leaves can be automatically cut into shreds by the cutting knife 311.

The automatic material delivering mechanism 4 comprises a third supporting rod 41, a transmission rod 42, a second belt assembly 43, a cross rod 44, a swinging rod 45, a fourth supporting rod 46, a short shaft 47, a disc 48, a top block 49, a spring plate 410, an inner ratchet wheel 411, a material transporting rotating shaft 413, a cutting table 414 and a conveyor belt 415, wherein the third supporting rod 41 is installed at the rear part of the right side of the base 1, the left side of the transmission shaft 31 is rotatably positioned at the lower part of the third supporting rod 41, the transmission rod 42 is rotatably arranged at the upper part of the third supporting rod 41, the second belt assembly 43 is connected between the transmission rod 42 and the left side of the transmission shaft 31, the cross rod 44 is rotatably installed at the tail end of the transmission rod 42, the fourth supporting rod 46 is arranged at the rear right side of the base 1, the short shaft 47 is rotatably arranged at the upper part of the fourth supporting rod 46, the swinging rod 45 is arranged on the short shaft 47, the upper end of the swinging rod 45 is rotatably connected with the rear end of the cross rod 44, the disc 48 is installed at the left side of the short shaft 47, the top block 49 and the spring plate 410 are arranged at the upper part of the right side of the disc 48, spring plate 410 is located kicking block 49 front side, spring plate 410 and the contact of kicking block 49, base 1 left side is equipped with cutting table 414, cutting table 414 top front side is connected with ejection of compact frame 313, cutting table 414 front side and the equal rotary type in rear side are provided with fortune material pivot 413, around being equipped with conveyer belt 415 between the fortune material pivot 413 of both sides, ratchet 411 in the right side of rear side fortune material pivot 413 is installed, circular slot 412 has been seted up to interior ratchet 411 right part, disc 48 rotary type is located circular slot 412, interior ratchet 411 and the cooperation of kicking block 49.

After the motor 2 is started, the transmission shaft 31 rotates clockwise, the cutting knife 311 swings up and down in a reciprocating manner, the transmission shaft 31 drives the transmission rod 42 to rotate through the second belt assembly 43, the transmission rod 42 drives the cross rod 44 to reciprocate back and forth, the cross rod 44 drives the swing rod 45 to swing back and forth, when the swing rod 45 swings backwards, the swing rod 45 drives the short shaft 47 to rotate clockwise, the short shaft 47 drives the ejector block 49 to rotate clockwise, the disc 48 rotates clockwise along with the inner ratchet wheel 411, the friction between the ejector block 49 and the inner ratchet wheel 411 when sliding relative to the inner ratchet wheel 411 is smaller than the friction between the material conveying rotating shaft 413 and the transmission belt 415, and under the action of the spring plate 410, the disc 48 cannot drive the inner ratchet wheel 411 to rotate clockwise, at the moment, the ejector block 49 slides in the inner ratchet wheel 411, when the swing rod 45 swings forwards, the ejector block 49 is clamped in the groove of the inner ratchet wheel 411, the ejector block 49 rotates anticlockwise, interior ratchet 411 drives fortune material pivot 413 and rotates, conveyer belt 415 anticlockwise rotates thereupon, conveyer belt 415 drives the tobacco leaf antedisplacement, at this moment, cutting knife 311 shifts up, when swinging lever 45 backward swing, kicking block 49 and interior ratchet 411 disengage, interior ratchet 411 stall, the tobacco leaf stops the antedisplacement, at this moment, cutting knife 311 moves down and cuts the tobacco leaf, under the cooperation of interior ratchet 411 and kicking block 49, realize the intermittent type nature removal of tobacco leaf, need not the manual work and pass the tobacco leaf to cutting knife 311 below.

Example 3

According to the drawings shown in fig. 4-6, the cutting machine further comprises a clamping mechanism 5, the clamping mechanism 5 comprises a fixed frame 51, fixed rods 52, a clamping plate 53, first springs 54 and threaded rods 55, the fixed frame 51 is arranged on the front side of the cutting table 414, the fixed frame 51 is arranged on the rear side of the discharge frame 313, the two fixed rods 52 are slidably mounted on the upper portion of the fixed frame 51, the clamping plate 53 is connected to the bottom of the fixed rod 52, the first springs 54 are connected between the top of the clamping plate 53 and the bottom of the fixed frame 51, the first springs 54 are wound on the fixed rods 52, the threaded rods 55 are rotatably arranged on the upper portion of the fixed frame 51, the threaded rods 55 are arranged between the fixed rods 52, and the bottoms of the threaded rods 55 are in contact with the clamping plate 53.

After the tobacco leaves are rolled up and placed into the discharge frame 313, the threaded rod 55 is manually rotated to move downwards, the threaded rod 55 moves downwards to drive the clamping plate 53 to move downwards, the first spring 54 is stretched, the clamping plate 53 moves downwards to clamp the rolled tobacco leaves, the tobacco leaves can be prevented from loosening in the cutting process, and the cutting knife 311 can conveniently shred the tobacco leaves.

Still including supporting mechanism 6, supporting mechanism 6 includes backup pad 61, T-shaped piece 62 and second spring 65, cutting table 414 antetheca rotary type is equipped with backup pad 61, backup pad 61 is located collecting box 314 top, bar groove 63 has all been seted up to the backup pad 61 top left and right sides, square groove 64 has all been seted up to two wall front sides about backup pad 61, T-shaped piece 62 is installed to the equal slidingtype in the backup pad 61 left and right sides, T-shaped piece 62 slidingtype is located bar groove 63 and square groove 64, all be connected with second spring 65 between the T-shaped piece 62 lower part lateral wall and the backup pad 61 inner wall of keeping away from collecting box 314 one side.

When the tobacco leaves are required to be cut, the T-shaped blocks 62 are manually slid towards two sides to enable the T-shaped blocks 62 to be located above the collecting box 314, the second spring 65 is stretched, at the moment, the supporting plate 61 is in a horizontal state, when the cutting knife 311 moves downwards to cut the tobacco leaves, under the action of the supporting plate 61, the cutting knife 311 can more easily cut the tobacco leaves, when the tobacco shreds are fully stacked on the supporting plate 61, the T-shaped blocks 62 are manually moved towards the middle to enable the tobacco shreds to be separated from the collecting box 314, the second spring 65 is contracted and reset, the supporting plate 61 rotates downwards, and the cut tobacco shreds on the supporting plate 61 fall into the collecting box 314 along with the cut tobacco shreds.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A tobacco leaf filament cutter is characterized by comprising:

the cutting machine comprises a base (1), wherein a motor (2) is arranged on the side part of the base (1), a cutting mechanism (3) is arranged on the front side of the base (1), and the cutting mechanism (3) is connected with the motor (2);

the automatic material conveying mechanism (4) is arranged on the left side of the base (1), and the automatic material conveying mechanism (4) is connected with the cutting mechanism (3);

the cutting mechanism (3) comprises:

the transmission shaft (31) is installed on an output shaft of the motor (2), a first supporting rod (33) is arranged on the front side of the base (1) close to one side of the motor (2), and the lower portion of the first supporting rod (33) is rotatably connected with a first rotating shaft (34);

the bevel gear assembly (32) is arranged between the side part of the transmission shaft (31) on the side far away from the motor (2) and the rear side of the first rotating shaft (34), the front side of the upper part of the first supporting rod (33) is rotatably provided with a second rotating shaft (35), and a first belt assembly (36) is connected between the side part of the second rotating shaft (35) on the side close to the first supporting rod (33) and the side part of the first rotating shaft (34) close to the second rotating shaft;

the rotating rod (37) is arranged at the front end of the second rotating shaft (35), at least two second supporting rods (38) are installed on the side part of the base (1) close to one side of the rotating rod (37), and a sliding rail (39) is rotatably arranged between the upper parts of the second supporting rods (38);

the sliding groove (310) is formed in the sliding rail (39), the front end of the rotating rod (37) is slidably located in the sliding groove (310), and a cutting knife (311) for cutting tobacco leaves is mounted on the lower portion, far away from the second supporting rod (38), of the sliding rail (39) through a bolt (312);

the discharging frame (313) is connected to the top of a part of the automatic material delivering mechanism (4) close to one side of the cutting knife (311), a collecting box (314) for collecting cut tobacco is placed on the front side of the base (1), and the collecting box (314) is positioned right below the cutting knife (311);

the automatic material delivery mechanism (4) comprises:

the rear part of the base (1) close to one side of the motor (2) is provided with a third support rod (41), the left side of the transmission shaft (31) is rotatably positioned at the lower part of the third support rod (41), and the upper part of the third support rod (41) is rotatably provided with a transmission rod (42);

the second belt assembly (43) is arranged between the transmission rod (42) and the side part of the transmission shaft (31) close to one side of the third supporting rod (41), and the tail end of the transmission rod (42) is rotatably provided with a cross rod (44);

the fourth supporting rod (46) is arranged on the rear side of the base (1) close to one side of the cross rod (44), the upper part of the fourth supporting rod (46) is rotatably connected with a short shaft (47), a swinging rod (45) is arranged on the short shaft (47), and the upper end of the swinging rod (45) is rotatably connected with the rear end of the cross rod (44);

the disc (48) is arranged on the side part of the short shaft (47) far away from one side of the motor (2), the top block (49) and the spring plate (410) are installed on the upper part of the side wall of the disc (48) close to one side of the fourth supporting rod (46), the spring plate (410) is located on the front side of the top block (49), and the spring plate (410) is in contact with the top block (49);

cutting bed (414), base (1) lateral part that is close to cutting knife (311) one side is provided with cutting bed (414), cutting bed (414) front side is connected with play work or material rest (313), the equal rotary type in both sides is equipped with fortune material pivot (413) around cutting bed (414), around being equipped with conveyer belt (415) between the fortune material pivot (413) of both sides, fortune material pivot (413) lateral part that is close to disc (48) one side is provided with interior ratchet (411), circular slot (412) have been seted up to interior ratchet (411) right part, disc (48) rotary type is located circular slot (412), kicking block (49) and interior ratchet (411) cooperation.

2. The tobacco cutter according to claim 1, further comprising a clamping mechanism (5), wherein the clamping mechanism (5) comprises:

the cutting table (414) front side is equipped with mount (51), mount (51) are located play work or material rest (313) rear side, mount (51) upper portion slidingtype is equipped with two piece at least dead levers (52), pinch-off blades (53) are installed to dead lever (52) bottom, be provided with between pinch-off blades (53) top and mount (51) bottom first spring (54), first spring (54) are around establishing on dead lever (52), threaded rod (55) are installed to mount (51) upper portion rotary type, threaded rod (55) are located between dead lever (52), threaded rod (55) bottom and pinch-off blades (53) contact.

3. A tobacco cutter according to claim 2, characterized in that it further comprises a support mechanism (6), the support mechanism (6) comprising:

backup pad (61) are installed to cutting bed (414) antetheca rotary type, backup pad (61) are located collecting box (314) top, bar groove (63) have all been seted up to backup pad (61) top left and right sides, square groove (64) have all been seted up to backup pad (61) left and right sides wall front portion, square groove (64) and bar groove (63) UNICOM, backup pad (61) left and right sides all slidingtype is equipped with T-shaped piece (62), T-shaped piece (62) slidingtype is located bar groove (63) and square groove (64), be provided with second spring (65) between the T-shaped piece (62) lower part inner wall of both sides and backup pad (61) inner wall.