CN213357988U

CN213357988U - Dewatering machine

Info

Publication number: CN213357988U
Application number: CN202021830028.5U
Authority: CN
Inventors: 杨春祥; 龚岳忠
Original assignee: Shengzhou Xinshandong Printing And Dyeing Co ltd
Current assignee: Shengzhou Xinshandong Printing And Dyeing Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-06-04
Anticipated expiration: 2030-08-27

Abstract

The utility model belongs to the technical field of weaving printing and dyeing and specifically relates to a hydroextractor is related to, and it includes the hydroextractor body, one side of hydroextractor body is provided with the montant, the one end fixedly connected with horizontal pole on ground is kept away from to the montant, the horizontal pole is located the top of hydroextractor body, one side that the montant was kept away from to the horizontal pole is provided with crowded water piece, crowded water tank has been seted up in the crowded water piece, it is connected with the water-collecting plate to slide in the crowded water tank, the direction of sliding of water-collecting plate with the length direction of montant is unanimous, be provided with on the water-collecting. This application has through setting up the water-collecting plate in crowded water groove, makes to exert the effort to the water-collecting plate through setting up the elastic component, and the effort is exerted to the cloth to the water-collecting plate to carry out preliminary dehydration, play the effect that alleviates the device burden.

Description

Dewatering machine

Technical Field

The application relates to the field of textile printing and dyeing, in particular to a dehydrator.

Background

At present, a dehydrator is a device for dehydrating, is mainly used for dehydrating cloth in a printing and dyeing mill, and is one of indispensable devices in a textile printing and dyeing process, wherein water is separated from the cloth by rotating a dehydrator body at a high speed and through centrifugal force.

The Chinese utility model patent with the granted publication number of CN201521091463.X discloses a dehydrator with automatic feeding and discharging functions, which comprises a transfer box, a conveying mechanism and a dehydrating device, wherein printing and dyeing cloth is placed in the transfer box, the conveying mechanism comprises a support, a driving wheel, a driven wheel and a first motor, the support is a T-shaped support and comprises a transverse rod and a vertical rod, the transverse rod is arranged above the vertical rod, the driving wheel and the driven wheel are respectively arranged at two ends of the transverse rod, the first motor is connected with the driving wheel, the dehydrating device comprises a rotary drum for dehydrating, a rotor for coiling the cloth, a second motor and a third motor, the rotary drum is arranged at one side of the conveying mechanism, the side wall of the rotary drum is provided with a water outlet hole, the rotor is arranged at the center of the rotary drum, the second motor is connected with the rotary drum, the third motor is connected with the rotor, and the cloth to be dehydrated, the production efficiency is greatly improved. When the dehydrator dehydrates the cloth, the cloth which is taken out of the washing machine and absorbs water is firstly sent into the cross bar and then enters the dehydrator.

The related art described above has the following drawbacks: after the cloth comes out of the washing machine, the cloth absorbs a large amount of water, so that the weight is large, and the cloth is conveyed to the cross rod at the moment, so that the pressure on the cross rod is large, and the cloth is easy to damage.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the cloth that needs the dehydration is overweight, this application provides a hydroextractor.

The application provides a hydroextractor body adopts following technical scheme:

the utility model provides a dehydrator, includes the dehydrator body, one side of dehydrator body is provided with the montant, the one end fixedly connected with horizontal pole on ground is kept away from to the montant, the horizontal pole is located the top of dehydrator body, one side that the montant was kept away from to the horizontal pole is provided with crowded water board, it has crowded basin to have seted up in the crowded water board, it is connected with two water-collecting plates to slide in the crowded basin, the glide direction of water-collecting plate with the length direction of montant is unanimous, be provided with on the water-collecting plate for the elastic component that pressure was applyed to the.

Through adopting above-mentioned technical scheme, before the hydroextractor body was carried with the cloth to the staff, send into the water squeezing tank with the cloth earlier in, through the elastic component for two water-collecting plates carry out an extrusion to the cloth, carry out a preliminary dehydration to the cloth, make can reduce the weight of cloth, alleviate the burden of machine, prevent the damage of horizontal pole.

Preferably, the elastic part is an extrusion spring, one end of the extrusion spring is connected with the water collecting plate, the other end of the extrusion spring is connected with the wall of the water squeezing groove, and the length direction of the extrusion spring is consistent with the vertical direction.

Through adopting above-mentioned technical scheme, the staff places the cloth in crowded basin, removes the water-collecting plate towards extrusion spring's direction earlier, puts into the cloth after that, no longer exerts force to the water-collecting plate, and extrusion spring exerts the effect to the water-collecting plate, and then the water-collecting plate has an extruded power to the cloth to improve extruded effect.

Preferably, set up on the water-collecting plate and be used for injecing the locating part of water-collecting plate glide direction, the locating part is the forked tail piece, the forked tail piece with water-collecting plate fixed connection, crowded water tank is close to the lateral wall of horizontal pole has seted up the dovetail, the forked tail piece with the dovetail slides and is connected.

Through adopting above-mentioned technical scheme, in the staff sent the cloth into water squeezing groove, the cloth had a forward effort to the water-collecting plate, because fixedly connected with dovetail piece on the water-collecting plate, the dovetail restricted the removal of stopper to guarantee water-collecting plate skew direction, avoid influencing the extrusion effect.

Preferably, one side of the cross rod, which is far away from the vertical rod, is connected with a collecting plate, and a collecting tank is arranged in the collecting plate.

Through adopting above-mentioned technical scheme, the water that the water-collecting plate extruded the cloth can come out and flow to the collecting vat in, realize the collection recycle to water.

Preferably, the one side of stating the montant is provided with first motor, the montant is kept away from the one end of horizontal pole is slided and is connected with the bracing piece, fixedly connected with stopper on the montant, offer on the bracing piece and be used for supplying the spacing groove that the stopper slided, the montant is close to the one end of bracing piece is followed the length direction circumference interval of montant is provided with the swivel becket, the first gear of output shaft fixedly connected with of first motor, first gear is with a plurality of the swivel becket meshing, one side of montant is provided with the locking first gear pivoted locking piece.

Through adopting above-mentioned technical scheme, when the staff carried out horizontal pole altitude mixture control, earlier opened first motor for first motor equals its gravity to the effort of first gear, stops locking piece to the locking of first gear after that, improves first motor load carrying capacity, and first motor drives first gear and drives the montant and reciprocate, obtains the high back of wanting, reduces the load carrying capacity of first motor, locks first gear after that, accomplishes the regulation of height. Through the height adjustment of the cross rods, the height of the cross rods is reduced when the work staff send the cloth, and the cloth is conveniently sent.

Preferably, the locking piece includes second gear and axis of rotation, one side of montant is provided with the locating lever, first motor with locating lever fixed connection, the axis of rotation with second gear fixed connection, the other end fixedly connected with locking lever of axis of rotation, the terminal surface of axis of rotation is the rectangle, seted up on the locating lever with axis of rotation complex rotation hole, the axis of rotation is in slide in the rotation hole, be provided with set nut on the locking lever, set nut with locking lever threaded connection.

Through adopting above-mentioned technical scheme, when the staff need lock first gear for the montant can not take place to slide from top to bottom, inserts the axis of rotation downthehole, rotates set nut after that for set nut rotates on the locking lever, first gear and second gear intermeshing, rotate set nut after that and make set nut and locating lever support tightly, and the installation is accomplished. Through the arrangement, the vertical rod can be locked, and the vertical rod is placed to slide up and down and deviate from the cloth feeding height.

Preferably, the montant is kept away from one side of hydroextractor body is provided with the fortune cloth car, it is connected with the dwang to rotate on the fortune cloth car, be close to one side of fortune cloth car on the bracing piece and seted up the confession the dwang male rotation groove, the rotation groove has been close to one side lateral wall on ground and has seted up and has pressed the indent, the tip of dwang be provided with press the groove complex to press the briquetting, it keeps to rotate the inslot be provided with press the briquetting to be located press the setting element of indent.

Through adopting above-mentioned technical scheme, when the staff carried the fixed of cloth wagon, rotate earlier the dwang and make according to the briquetting insert and press the indent on the dwang, utilizing the setting element, will press the briquetting to press and press in the indent for fixed to the cloth wagon, prevent at the in-process of work feed, the cloth wagon takes place to remove, influences the efficiency of fortune cloth.

Preferably, the setting element includes positioning spring and the locating piece that is used for pressing the dwang, positioning spring's one end is inserted and is located in the rotation groove, and the other end supports with the locating piece and establishes, the locating piece is kept away from one side fixedly connected with slide bar of positioning spring, the opening part of rotation groove is installed and is used for the stopper piece of spacing locating piece.

Through adopting above-mentioned technical scheme, when needs will be fixed according to the briquetting in pressing the inslot, utilize earlier the slide bar to produce the effort to the locating piece, the locating piece produces the effort to positioning spring, will press according to in the briquetting inserts presses the inslot, release slide bar after that, because positioning spring is in compression state, positioning spring produces the effort to the locating piece for the locating piece carries out one to pressing the briquetting and presses the locking.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through elastic component and water collection sheet for the water collection sheet carries out an extrusion to the cloth, thereby carries out a preliminary dehydration to the cloth, makes the weight that can reduce the cloth, alleviates the burden of machine.

2. Through fixing the cloth conveying vehicle, the stability of cloth conveying cannot be influenced by the movement of the cloth conveying vehicle in the conveying process.

3. The height of the cross rod is adjusted through the first motor, so that the height of the cross rod can be lowered firstly when cloth is fed, and the burden of workers is relieved.

Drawings

FIG. 1 is a schematic overall structure of the present application;

FIG. 2 is a schematic structural diagram of a support rod, which is used to show the structure of a limiting block;

FIG. 3 is a schematic diagram of the positioning rod showing the structure of the locking rod;

FIG. 4 is a schematic cross-sectional view of the support rod along the axial direction, which is used to show the structure of the positioning member;

FIG. 5 is a schematic view of the construction of the wringing plate;

fig. 6 is a cross-sectional view of the vertical rod along the axial direction, which is used for showing the structure of the transmission assembly.

Reference numerals: 1. a dehydrator body; 21. a support bar; 22. a vertical rod; 23. a cross bar; 24. a limiting block; 25. a limiting groove; 31. a cloth conveying vehicle; 32. a support block; 33. a connecting rod; 34. rotating the rod; 35. a pressing block; 36. a rotating groove; 37. pressing the groove; 4. a transmission assembly; 41. a second motor; 42. a first pulley; 43. a second pulley; 44. a third belt pulley; 45. a first belt; 46. a second belt; 47. a first drive wheel; 48. a second drive wheel; 5. a positioning member; 51. a positioning spring; 52. positioning blocks; 53. a slide bar; 61. positioning a rod; 62. a first motor; 63. a first gear; 64. a rotating ring; 7. a locking member; 71. a second gear; 72. a rotating shaft; 73. rotating the hole; 74. a locking lever; 75. positioning a nut; 82. a water squeezing plate; 83. a water squeezing tank; 84. a water collection plate; 85. a dovetail groove; 86. a dovetail block; 87. a compression spring; 91. a collection plate; 92. collecting tank; 93. a water conduit; 94. a water collection barrel; 10. a cloth guide ring; 11. a moving chamber; 12. a base; 13. a stop block.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a dehydrator.

Referring to fig. 1, the dehydrator includes a dehydrator body 1. The dehydrator body 1 is located above the base 12, a support rod 21 is arranged on one side of the dehydrator body 1, the support rod 21 is located above the base 12, and a vertical rod 22 is connected to the support rod 21 in a sliding manner.

Referring to fig. 1 and 2, fixedly connected with stopper 24 is gone up to the lateral wall that montant 22 is close to the one end of bracing piece 21, and stopper 24 is located montant 22 and keeps away from one side of hydroextractor body 1, and bracing piece 21 has seted up spacing groove 25 on keeping away from the inside wall of hydroextractor body 1, and stopper 24 sliding connection is in spacing groove 25, and bracing piece 21 slides with montant 22 axial, and circumference does not rotate. The side wall of one end of the vertical rod 22 far away from the support rod 21 is fixedly connected with a cross rod 23, and the length direction of the cross rod 23 is mutually vertical to that of the vertical rod 22.

Referring to fig. 2 and 3, a positioning rod 61 is disposed on one side of the support rod 21 close to the dehydrator body 1, a first motor 62 is fixedly connected to the positioning rod 61, and an output shaft of the first motor 62 passes through the positioning rod 61 and is fixedly connected with a first gear 63; one end of the vertical rod 22 close to the support rod 21 is provided with rotating rings 64 at intervals along the length direction of the vertical rod 22, and the first gear 63 is meshed with the 3 rotating rings 64. The support rod 21 is provided with a locking member 7, and the locking member 7 includes a second gear 71 and a rotating shaft 72. The second gear 71 is fixedly connected with the rotating shaft 72, the end face of the rotating shaft 72 is rectangular, the supporting rod 21 is provided with a rotating hole 73, the rotating shaft 72 slides in the rotating hole 73, and the side wall of the rotating shaft 72 is tightly abutted against the inner wall of the rotating hole 73. A locking lever 74 is fixedly connected to an end of the rotating shaft 72 remote from the second gear 71. The locking lever 74 is provided with a securing member, which is a retaining nut 75. The positioning nut 75 is connected with the locking rod 74 through threads, and the positioning nut 75 is tightly pressed against the side wall of the support rod 21. The second gear 71 is intermeshed with the first gear 63.

Referring to fig. 1 and 4, a cloth conveying trolley 31 is placed on one side of the support rod 21 far away from the dehydrator body 1, one side of the cloth conveying trolley 31 close to the dehydrator body 1 is fixedly connected with two support blocks 32, the two support blocks 32 are provided with the same number, the placing directions of the two support blocks 32 are parallel to the ground, and a connecting rod 33 is fixedly connected between the two support blocks 32. Connecting rod 33 is last to rotate and be connected with dwang 34, and the one end fixedly connected with that dwang 34 kept away from fortune cloth car 31 presses piece 35, presses piece 35 to be located the one side that dwang 34 is close to ground.

The rotating groove 36 is formed in one side, away from the dehydrator body 1, of the supporting rod 21, the rotating rod 34 is connected in a sliding mode and is connected with the rotating groove 36, the pressing groove 37 is formed in the rotating groove 36, the pressing groove 37 is located on the side wall, close to the ground, of the rotating groove 36, the pressing block 35 is connected with the pressing groove 37 in an inserting mode, and the pressing block 35 is connected with the pressing groove 37 in a sliding mode. The positioning member 5 is disposed in the rotating groove 36, and the positioning member 5 includes a positioning spring 51 and a positioning block 52. One end of the positioning spring 51 is abutted to the positioning block 52, the other end of the positioning spring 51 is inserted into the rotating groove 36, one side, far away from the dehydrator body 1, of the positioning block 52 is fixedly connected with a sliding rod 53, the length direction of the sliding rod 53 is horizontally arranged, one side, close to the ground, of the positioning block 52 is abutted to the pressing block 35, the top wall of the rotating groove 36 is fixedly connected with a blocking block 13, and the blocking block 13 is abutted to the positioning block 52.

Referring to fig. 1 and 5, a side wall of the cross bar 23 away from the vertical bar 22 is fixedly connected with a wringing plate 82. A water squeezing groove 83 is formed in the water squeezing plate 82, two water collecting plates 84 are connected in the water squeezing groove 83 in a sliding mode, and the sliding direction of the two water collecting plates 84 is consistent with the length direction of the vertical rod 22. The water collecting plate 84 is fixedly connected with dovetail grooves 85 on two side walls in the width direction of the cross rod 23, the water squeezing grooves 83 are provided with identical dovetail grooves 85 on two side walls in the width direction of the cross rod 23, the dovetail blocks 86 correspond to the dovetail grooves 85 one by one, and the dovetail blocks 86 are connected with the dovetail grooves 85 in a sliding mode. The side wall of the water squeezing groove 83 is abutted with a squeezing spring 87, one end, far away from the side wall connected with the water squeezing groove 83, of the squeezing spring 87 is abutted with the water collecting plate 84, and the length direction of the squeezing spring 87 is consistent with the vertical direction.

Referring to fig. 1, a collecting plate 91 is fixedly connected to one side of the cross rod 23 located on the vertical rod 22 through a supporting plate, a collecting groove 92 is formed in the collecting plate 91, and an opening of the collecting groove 92 faces upward and is arc-shaped. The collection plate 91 is located below the crossbar 23. One end of the collecting plate 91 far away from the dehydrator body 1 is fixedly connected with a water guide pipe 93, the water guide pipe 93 is communicated with the collecting tank 92, and a water collecting bucket 94 is arranged under the water guide pipe 93.

Referring to fig. 6, a moving chamber 11 is formed in the cross bar 23, and a transmission assembly 4 is disposed on the cross bar 23, wherein the transmission assembly 4 includes a second motor 41, a first pulley 42, a second pulley 43, a third pulley 44, a first belt 45, and a second belt 46. The output shaft of second motor 41 runs through and removes chamber 11 chamber wall and first band pulley 42 key-type connection, and first band pulley 42 rotates to be connected in removing chamber 11, and one side that locating lever 61 was kept away from to horizontal pole 23 is provided with the first action wheel 47 of rotation connection on horizontal pole 23 and rotates the second action wheel 48 of connection on horizontal pole 23, and first action wheel 47 is located the lateral wall that horizontal pole 23 is close to the one end of hydroextractor body 1, and second action wheel 48 is located the lateral wall that horizontal pole 23 kept away from the one end of hydroextractor body 1. The rotating shaft of the first driving wheel 47 passes through the side wall of the moving cavity 11 and is connected with the second belt wheel 43 in a key mode, and the second belt wheel 43 is connected in the moving cavity 11 in a rotating mode; the rotation axis of the second driving pulley 48 is keyed to the third pulley 44 through the side wall of the moving chamber 11, and the third pulley 44 is rotatably connected inside the moving chamber 11. The first belt 45 is sleeved on the first belt wheel 42 and the second belt wheel 43 at the same time, and the first belt 45 is in a tensioning state; the second belt 46 is simultaneously sleeved on the first pulley 42 and the third pulley 44, and the second belt 46 is in a tensioned state.

Referring to fig. 1, a cloth guide ring 10 is fixedly connected to a side wall of one end of a cross bar 23 close to a dehydrator body 1, and the cloth guide ring 10 is located below the cross bar 23.

The implementation principle of a dehydrator in the embodiment of the application is as follows: when the staff need carry the hydroextractor body 1 with the cloth and dewater, transport the cloth transport car 31 to the one side that is close to bracing piece 21 earlier, the staff removes the slide bar 53 on with the cloth transport car 31 to rotating groove 36, and slide bar 53 removes locating piece 52 towards the direction of hydroextractor, and locating piece 52 makes locating spring 51 remove towards the direction of hydroextractor body 1, exposes and presses groove 37. Then, the rotating lever 34 on the side of the cloth transporting cart 31 close to the dehydrator body 1 is moved into the rotating groove 36, so that the rotating lever 34 is close to the pressing block 35 on the dehydrator body 1 and enters the pressing groove 37, and then the positioning block 52 receives the urging force of the positioning spring 51 so that the positioning block 52 presses and fixes the pressing block 35 one by one.

After the fixing of the cloth carriage 31 is completed, the height of the support rod 21 is adjusted, and the positioning nut 75 is screwed, so that the positioning nut 75 is separated from the locking rod 74, and the second gear 71 is not engaged with the first gear 63. Then, the first motor 62 is turned on, the output shaft of the first motor 62 drives the first gear 63 to rotate, the first gear 63 rotates to drive the vertical rod 22 to move downwards, and the height of the cross rod 23 is reduced. The cloth in the cloth conveying cart 31 is then fed into the first driving wheel 47, the wringing slot 83, the second driving wheel 48 and the cloth guide ring 10 at a time. Then, the first motor 62 is turned on, so that the first motor 62 drives the vertical rod 22 to slide upwards through the gear. After reaching the appropriate height, the rotation speed of the first motor 62 is adjusted so that the force of the first gear 63 on the vertical rod 22 is equal to the gravity thereof, then the locking rod 74 is inserted so that the first gear 63 and the second gear 71 are engaged with each other, the positioning nut 75 is screwed so that the fixation of the first gear 63 is completed, and the first motor 62 is turned off.

Then, the second motor 41 is turned on, an output shaft of the second motor 41 drives the first belt pulley 42 to rotate, the first belt pulley 42 rotates and simultaneously drives the first belt 45 and the second belt 46 to work, the first belt 45 drives the second belt pulley 43 to rotate, and the second belt pulley 43 rotates and drives the first driving wheel 47 to rotate; the second belt 46 rotates the third pulley 44, and the third pulley 44 rotates the second capstan 48. So that the cloth is driven by the first driving wheel 47 and the second driving wheel 48 to enter the dehydrator body 1. And after all the materials are transported, carrying out the next dehydration work.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a dehydrator, includes dehydrator body (1), one side of dehydrator body (1) is provided with montant (22), the one end fixedly connected with horizontal pole (23) on ground are kept away from to montant (22), horizontal pole (23) are located the top of dehydrator body (1), its characterized in that: one side that montant (22) were kept away from in horizontal pole (23) is provided with crowded water board (82), crowded water tank (83) have been seted up in crowded water board (82), crowded water tank (83) internal slipping is connected with two water-collecting sheet (84) that are used for mutual centre gripping, the direction of sliding of water-collecting sheet (84) with the length direction of montant (22) is unanimous, be provided with on water-collecting sheet (84) and give water-collecting sheet (84) exert pressure's elastic component.

2. The dehydrator of claim 1, wherein: the elastic piece is an extrusion spring (87), one end of the extrusion spring (87) is connected with the water collecting plate (84), the other end of the extrusion spring (87) is connected with the groove wall of the water squeezing groove (83), and the length direction of the extrusion spring (87) is consistent with the vertical direction.

3. The dehydrator of claim 2, wherein: set up in water-collecting plate (84) and be used for prescribing a limit part of water-collecting plate (84) glide direction, the limit part is dovetail block (86), dovetail block (86) with water-collecting plate (84) fixed connection, crowded basin (83) are close to dovetail (85) have been seted up to the lateral wall of horizontal pole (23), dovetail block (86) with dovetail (85) are slided and are connected.

4. The dehydrator of claim 1, wherein: one side of the cross rod (23) far away from the vertical rod (22) is connected with a collecting plate (91), and a collecting groove (92) is formed in the collecting plate (91).

5. The dehydrator of claim 1, wherein: one side of montant (22) is provided with first motor (62), montant (22) are kept away from the one end of horizontal pole (23) is slided and is connected with bracing piece (21), fixedly connected with stopper (24) are gone up in montant (22), offer on bracing piece (21) and be used for the confession spacing groove (25) that stopper (24) slided, montant (22) are close to the one end of bracing piece (21) is followed the length direction circumference interval of montant (22) is provided with swivel becket (64), the first gear of output shaft fixedly connected with (63) of first motor (62), first gear (63) are with a plurality of swivel becket (64) meshing, one side of montant (22) is provided with the locking first gear (63) pivoted locking piece (7).

6. The dehydrator of claim 5, wherein: locking piece (7) include second gear (71) and axis of rotation (72), one side of montant (22) is provided with locating lever (61), first motor (62) with locating lever (61) fixed connection, axis of rotation (72) with second gear (71) fixed connection, the other end fixedly connected with locking lever (74) of axis of rotation (72), the terminal surface of axis of rotation (72) is the rectangle, set up on locating lever (61) with axis of rotation (72) complex rotation hole (73), axis of rotation (72) are in rotate hole (73) internal slip, be provided with positioning nut (75) on locking lever (74), positioning nut (75) with locking lever (74) threaded connection.

7. The dehydrator of claim 6, wherein: montant (22) are kept away from one side of hydroextractor body (1) is provided with fortune cloth car (31), it is connected with dwang (34) to rotate on fortune cloth car (31), the confession has been seted up to one side that is close to fortune cloth car (31) on bracing piece (21) dwang (34) male rotation groove (36), rotation groove (36) are close to one side lateral wall on ground and have been seted up and press indent (37), the tip of dwang (34) be provided with press indent (37) complex to press and press briquetting (35), be provided with in rotation groove (36) and keep pressing briquetting (35) to be located press setting element (5) in indent (37).

8. The dehydrator of claim 7, wherein: locating piece (5) are including positioning spring (51) and locating piece (52) that are used for pressing dwang (34), positioning spring (51) one end is inserted and is located in rotation groove (36), the other end supports with locating piece (52) and establishes, locating piece (52) are kept away from one side fixedly connected with slide bar (53) of positioning spring (51), the opening part of rotation groove (36) is installed and is used for stopper piece (13) of spacing locating piece (52).