CN213081029U - Column type snagging machine - Google Patents

Abstract

The utility model relates to a column type snagging machine, it includes the portal frame, it is provided with the crossbeam to slide on the portal frame, be provided with the grinding component who is used for the material of polishing on the crossbeam, the grinding component includes connecting block and grinding emery wheel, the connecting block slides and sets up on the crossbeam, the setting can be dismantled on the connecting block to the grinding emery wheel, still be provided with the dust hood that hides that is used for sheltering from the grinding emery wheel on the connecting block, it is provided with first slider to hide one side that the dust hood is close to the connecting block, first spout has been seted up on the connecting block, first slider and first spout sliding fit. This application has the effect of convenient to detach grinding wheel.

Description

Column type snagging machine

Technical Field

The application relates to the field of grinding tool equipment, in particular to a column type snagging machine.

Background

Rough grinding is the first step of working the stone, also called rough grinding in practice, and a rough grinding machine is a grinding machine that is common in rough grinding.

The current chinese patent with an authorization publication number CN2499171Y discloses a column type snagging machine, the key points of which technical scheme lie in: including setting up the stand in the workstation both sides, the slider of suit on the stand, the spindle drum and set up the motor in the spindle drum top, the characteristic is that place the slip cap in the through-hole in the slider, the slip cap suit is on the stand, the stand adopts the cylinder, set up horizontal cylinder guide rail between the stand of workstation both sides, install spindle drum lateral shifting control mechanism on the cylinder guide rail, the both ends of cylinder guide rail are connected with the slider is solid respectively, install the cylinder type emery wheel that axis and cylinder guide rail are parallel on the main shaft of setting in the spindle drum.

With respect to the related art among the above, the inventors consider that there is a drawback that the cylindrical grinding wheel is inconvenient to disassemble.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the dismantlement grinding wheel, this application provides a column type snagging machine.

The application provides a column type snagging machine adopts following technical scheme:

the utility model provides a column type snagging machine, includes the portal frame, it is provided with the crossbeam to slide on the portal frame, be provided with the grinding component who is used for the material of polishing on the crossbeam, the grinding component includes connecting block and grinding emery wheel, the connecting block slides and sets up on the crossbeam, the setting can be dismantled on the connecting block to the grinding emery wheel, still be provided with the dust hood that is used for sheltering from the grinding emery wheel on the connecting block, the dust hood is close to one side of connecting block and is provided with first slider, first spout has been seted up on the connecting block, first slider and first spout sliding fit.

By adopting the technical scheme, when the grinding wheel is used, a grinding wheel in the grinding assembly can grind materials, and the dust shielding plate covers the grinding wheel and can shield dust emitted by the grinding wheel when the grinding wheel grinds the materials; when the grinding wheel needs to be replaced, the first sliding block is firstly made to slide in the first sliding groove, so that the dust shielding cover does not cover the grinding wheel any more, then the grinding wheel is detached from the connecting block, and the effect of facilitating the detachment of the grinding wheel is achieved.

Preferably, the connecting block is provided with a connecting plate, the connecting plate is vertically provided with vertical plates, the two vertical plates are provided with bearings, the grinding wheel comprises a central shaft, two ends of the central shaft are in interference fit with inner rings of the two bearings respectively, the connecting block is provided with a fixing part for fixing the connecting plate, one end of the central shaft extends out of the vertical plates, and the end part of the central shaft is provided with a driving part.

Through adopting above-mentioned technical scheme, the connecting plate passes through the mounting and can dismantle the setting on the connecting block, the riser sets up perpendicularly and provides the supporting role for the grinding wheel on the connecting plate, the grinding wheel is fixed between two risers through two bearings, the bearing makes the grinding wheel fix can realize normal rotation between two risers when between two risers, it makes the grinding wheel can dismantle on the connecting block to set up the connecting plate, it is more convenient when overhauing or changing.

Preferably, the fixing part comprises a plurality of first fixing bolts, the first fixing bolts penetrate through the connecting plate, and a plurality of first threaded holes in threaded fit with the first fixing bolts are formed in the connecting block.

Through adopting above-mentioned technical scheme, when the fixed connection board, at first with the connecting plate laminating to the connecting block on, then insert the connecting plate with a plurality of first fixing bolt from one side that the connecting plate kept away from the connecting block, insert the first screw hole on the connecting block again, screw up first fixing bolt, accomplish the fixed to the connecting plate, set up a plurality of first fixing bolt and make the fixed knot of connecting plate on the connecting block construct stably.

Preferably, the driving piece includes the axis of rotation, the axis of rotation rotates and sets up on the connecting block, the fixed first carousel that is provided with in one end of axis of rotation, be provided with driving motor on the connecting block, be provided with the second carousel on driving motor's the output shaft, connect through the belt between first carousel and the second carousel, still be provided with the connecting piece with the central axis is connected in the axis of rotation.

Through adopting above-mentioned technical scheme, when the center pin of grinding wheel rotated, the grinding wheel was being driven by the rotation of center pin and is taking place to rotate, the center pin passes through the connecting piece with the axis of rotation and is connected, the axis of rotation rotates and sets up on the connecting block, when driving motor started, driving motor's output shaft rotated and is driving the second carousel and rotate, the effort that the second carousel rotated the production passes through the belt and passes to on the first carousel, make first carousel also take place to rotate, thereby it takes place to rotate to drive the axis of rotation, drive grinding wheel work.

Preferably, the connecting piece comprises a first flange plate, the first flange plate is fixedly arranged at one end, close to the grinding wheel, of the rotating shaft, a second flange plate is fixedly arranged at one end, extending out of the vertical plate, of the central shaft, the first flange plate is attached to the second flange plate, a plurality of connecting bolts penetrate through the first flange plate, a plurality of connecting nuts are arranged on the second flange plate, and the connecting bolts are in threaded fit with the connecting nuts.

Through adopting above-mentioned technical scheme, when connecting center pin and axis of rotation, at first laminate the one side of first ring flange on the one side of second ring flange, then insert the connecting bolt on the first ring flange from the another side of first ring flange, wear out from the another side of second ring flange, reuse coupling nut, twist coupling nut with connecting bolt, the completion is to the fixed of first ring flange and second ring flange, the realization is to the connection of center pin and axis of rotation, have the convenient and stable advantage of connection structure of dismantlement.

Preferably, a water hose is arranged on the portal frame, extends into the dust hood and is wound in the dust hood.

Through adopting above-mentioned technical scheme, when the grinding emery wheel material of polishing, can give off more dust on the material, the water delivery hose of setting on the dust cover can spray water to the grinding emery wheel for the dust is difficult for diffusing, also can dispel the heat to the grinding emery wheel, prevents the grinding emery wheel to a certain extent and damage.

Preferably, a second fixing bolt penetrates through the first sliding block, and a second threaded hole in threaded fit with the second fixing bolt is formed in the bottom wall of the first sliding groove and located on the connecting block.

Through adopting above-mentioned technical scheme, when the dust hood covers on the grinding wheel, second fixing bolt congeals and can fix the dust hood to the connecting block after going into the second screw hole, prevents that dust hood and grinding wheel contact and lead to the grinding wheel to hide the dust hood and damage.

Preferably, a second sliding block is arranged on one side, away from the grinding wheel, of the connecting block, a second sliding groove is formed in the cross beam along the length direction of the cross beam, the second sliding block is in sliding fit with the second sliding groove, a first lead screw is arranged in the second sliding groove in a rotating mode, the first lead screw penetrates through the second sliding block and is in threaded fit with the second sliding block, the second sliding groove extends out of one end of the first lead screw, a first servo motor is arranged on the cross beam, and an output shaft of the first servo motor is fixedly connected with one end, extending out of the second sliding groove, of the first lead screw.

Through adopting above-mentioned technical scheme, because the second slider is restricted in the second spout by second spout and first lead screw, so the second slider only can slide along the length direction of second spout in the second spout, when first servo motor starts, first lead screw is being driven at the second spout internal rotation, the rotation of first lead screw is driving the second slider with first lead screw thread fit and is moving in the second spout, make the connecting block be driven and moving on the crossbeam, thereby make the position of grinding emery wheel on the crossbeam change, the position of grinding emery wheel on the material also can change, make the grinding emery wheel can polish the material in a plurality of positions on the horizontal direction.

Preferably, one side of the cross beam, which is away from the connecting block, is fixedly provided with two third sliding blocks, the portal frame is provided with two third sliding grooves along the height direction of the portal frame, the third sliding blocks are in sliding fit with the third sliding grooves, a second lead screw is further arranged in the third sliding grooves, the second lead screw penetrates through the third sliding blocks and is in threaded fit with the third sliding blocks, one end of the second lead screw extends out of the second sliding grooves, the portal frame is provided with a second servo motor, and an output shaft of the second servo motor is fixedly connected with one end of the second lead screw, which extends out of the third sliding grooves.

Through adopting above-mentioned technical scheme, because the third slider is restricted in the third spout by second lead screw and third spout, so the third slider only can slide along the length direction of third spout in the third spout, when second servo motor started, the second lead screw is being driven at the rotation of third spout, the rotation of second lead screw is driving the third slider with second lead screw thread fit and is moving in the third spout, make the crossbeam be driven and move on the portal frame, the position of grinding wheel in vertical direction also can change, make the grinding wheel can polish the material of co-altitude not.

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

1. according to the grinding wheel fixing device, the grinding wheel is detachably arranged on the connecting block, and the dust shielding plate can slide on the connecting block, so that the dust shielding cover does not cover the grinding wheel any more, and then the grinding wheel is detached from the connecting block, and the effect of conveniently detaching the grinding wheel is achieved;

2. the grinding wheel is detachably arranged on the connecting block through the connecting plate, the two vertical plates and the bearings arranged on the two vertical plates, so that the grinding wheel is more convenient to overhaul or replace;

3. this application is through setting up the water delivery hose on covering, and the water delivery hose can spray water to the grinding wheel on for the difficult diffusion of dust also can dispel the heat to the grinding wheel, prevents to a certain extent that the grinding wheel from damaging.

Drawings

FIG. 1 is a schematic block diagram of one embodiment of the present invention;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of a connecting block according to one embodiment of the present application;

FIG. 4 is an enlarged schematic view of portion B of FIG. 3;

fig. 5 is an exploded view of a gantry, a beam, and a connector block according to one embodiment of the present application.

Description of reference numerals: 1. a gantry; 11. a cross beam; 111. a second chute; 112. a first lead screw; 113. a first servo motor; 114. a third slider; 12. a water delivery hose; 13. a third chute; 131. a second lead screw; 132. a second servo motor; 14. a base; 2. polishing the assembly; 21. connecting blocks; 211. a first chute; 212. a fixed block; 22. grinding the grinding wheel; 221. a central shaft; 23. a connecting plate; 231. a vertical plate; 2311. a bearing; 24. a second slider; 3. a dust cover; 31. a first slider; 311. a second fixing bolt; 4. a fixing member; 41. a first fixing bolt; 5. a drive member; 51. a rotating shaft; 511. a first turntable; 52. a drive motor; 521. a second turntable; 522. a fixing plate; 53. a belt; 6. a connecting member; 61. a first flange plate; 611. a connecting bolt; 62. a second flange plate; 621. and connecting a nut.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses a column type snagging machine. Referring to fig. 1 and 2, a column type snagging machine, including portal frame 1, the slip is provided with crossbeam 11 on portal frame 1, is provided with the grinding component 2 that is used for polishing the material on crossbeam 11, and portal frame 1 and crossbeam 11 provide the supporting role for grinding component 2, are provided with the base 14 that is used for placing the material under the portal frame 1, and when polishing the material, the material is placed on base 14, and grinding component 2 can polish the material.

Referring to fig. 1 and 2, the grinding assembly 2 includes a connecting block 21 and a grinding wheel 22, the grinding wheel 22 is detachably disposed on the connecting block 21, a connecting plate 23 is disposed on the connecting block 21, an upright plate 231 is vertically disposed on the connecting plate 23, the connecting plate 23 and the upright plate 231 provide a supporting function for the grinding wheel 22, and the grinding wheel 22 can be detached by detaching the connecting plate 23 from the connecting block 21; bearings 2311 are arranged on the two vertical plates 231, the grinding wheel 22 comprises a central shaft 221, two ends of the central shaft 221 are in interference fit with inner rings of the two bearings 2311 respectively, and the two bearings 2311 enable the central shaft 221 to be fixed between the two vertical plates 231 and can rotate normally; be provided with mounting 4 that is used for fixed connection board 23 on the connecting block 21, mounting 4 makes connecting board 23 detachable set up on connecting block 21, mounting 4 includes a plurality of first fixing bolt 41, a plurality of first fixing bolt 41 all wear to establish on connecting board 23, set up a plurality of first screw holes with 41 screw-thread fit of first fixing bolt on the connecting block 21, when erection joint board 23, at first laminate connecting board 23 with connecting block 21, then twist into first screw hole with a plurality of first fixing bolt 41, accomplish the fixed to connecting board 23, thereby install grinding wheel 22 on connecting block 21.

Referring to fig. 1 and 2, a dust shielding cover 3 is further arranged on the connecting block 21, the dust shielding cover 3 is used for shielding a grinding wheel 22, when the grinding wheel 22 polishes materials, more dust can be generated, the dust shielding cover 3 can shield the dust, and the dust can be prevented from escaping to a certain extent, a water hose 12 is arranged on the portal frame 1, the water hose 12 extends into the dust shielding cover 3 and is wound in the dust shielding cover 3, the water hose 12 can be sprinkled onto the grinding wheel 22, so that the dust can be prevented from escaping, the grinding wheel 22 can be cooled, and the grinding wheel 22 can be prevented from being damaged to a certain extent; a first sliding block 31 is arranged on one side, close to the connecting block 21, of the dust shielding cover 3, a first sliding groove 211 is formed in the connecting block 21, the first sliding block 31 can slide in the first sliding groove 211, when the first sliding block 31 slides in the first sliding groove 211 towards one end far away from the grinding wheel 22, the dust shielding cover 3 does not cover the grinding wheel 22 any more, the grinding wheel 22 can be exposed, and the grinding wheel 22 can be conveniently detached; wear to be equipped with second fixing bolt 311 on the first slider 31, the diapire of first spout 211 just is located and sets up the second screw hole with second fixing bolt 311 screw-thread fit on the connecting block 21, and second fixing bolt 311 and the cooperation of second screw hole can fix dust hood 3 on connecting block 21 for dust hood 3 can not slide on connecting block 21.

Referring to fig. 3, one end of the central shaft 221 extends out of the vertical plate 231 and the end portion is provided with a driving part 5, the driving part 5 is used for driving the central shaft 221 to rotate, the driving part 5 includes a rotating shaft 51, the rotating shaft 51 is connected with the central shaft 221, the connecting block 21 is provided with a fixing block 212, the fixing block 212 is hollow and both ends of the fixing block 212 are both provided with a notch, the rotating shaft 51 penetrates through the fixing block 212 and both ends of the rotating shaft 51 extend out of the notches, and the rotating shaft 51 can rotate on; one end of the rotating shaft 51 is fixedly provided with a first rotating disc 511, the connecting block 21 is provided with a driving motor 52, an output shaft of the driving motor 52 is provided with a second rotating disc 521, the first rotating disc 511 and the second rotating disc 521 are connected through a belt 53, when the driving motor 52 is started, the output shaft of the driving motor 52 drives the first rotating disc 511 to rotate, the acting force of the first rotating disc 511 is transmitted to the second rotating disc 521 through the belt 53, and then the second rotating disc 521 is driven to rotate, so that the rotating shaft 51 rotates, and the central shaft 221 of the grinding wheel 22 is driven to rotate.

Referring to fig. 3 and 4, the rotating shaft 51 is further provided with a connecting member 6, the connecting member 6 is used for connecting the rotating shaft 51 with the central shaft 221, and when the connecting member 6 is disconnected, the grinding wheel 22 can be disconnected from the driving member 5, so that the grinding wheel 22 can be conveniently detached without detaching the driving member 5; the connecting piece 6 comprises a first flange plate 61 and a second flange plate 62, the first flange plate 61 is welded at one end, close to the grinding wheel 22, of the rotating shaft 51, the second flange plate 62 is welded at one end, close to the driving assembly, of the central shaft 221, a plurality of connecting bolts 611 penetrate through the first flange plate 61, a plurality of connecting nuts 621 are arranged on the second flange plate 62, the connecting bolts 611 are in threaded fit with the connecting nuts 621, when the connecting piece is installed, the first flange plate 61 and the second flange plate 62 are firstly attached, then the connecting bolts 611 are screwed into the connecting nuts 621, the first flange plate 61 and the second flange plate 62 can be fixed together, and the rotating shaft 51 is connected with the central shaft 221.

Referring to fig. 1 and 5, a second slider 24 is arranged on one surface of the connecting block 21 away from the grinding wheel 22, a second sliding groove 111 is formed in the cross beam 11 along the length direction of the cross beam, the second slider 24 can slide in the second sliding groove 111, a first lead screw 112 is rotatably arranged in the second sliding groove 111, the first lead screw 112 penetrates through the second slider 24 and is in threaded fit with the second slider 24, the second slider 24 is limited in the second sliding groove 111 by the second sliding groove 111 and the first lead screw 112, and when the first lead screw 112 rotates, the first lead screw 112 can drive the second slider 24 to slide in the length direction of the second sliding groove 111; one end of the first lead screw 112 extends out of the second chute 111, the beam 11 is provided with a first servo motor 113, an output shaft of the first servo motor 113 and one end of the first lead screw 112 extending out of the second chute 111 are fixedly connected, when the first servo motor 113 is started, the output shaft of the first servo motor 113 rotates to drive the first lead screw 112 to rotate in the second chute 111, so that the connecting block 21 can slide left and right on the beam 11, and the grinding wheel 22 on the connecting block 21 can grind materials at a plurality of positions.

Referring to fig. 1 and 5, one side of the cross beam 11, which is away from the connecting block 21, is fixedly provided with two third sliding blocks 114, the portal frame 1 is provided with two third sliding grooves 13 along the height direction of the portal frame 1, the two third sliding grooves 13 are respectively located at two sides of the portal frame 1, the third sliding blocks 114 can slide in the third sliding grooves 13, the third sliding grooves 13 are also internally provided with second lead screws 131, the second lead screws 131 penetrate through the third sliding blocks 114 and are in threaded fit with the third sliding blocks 114, the third sliding grooves 13 and the second lead screws 131 limit the third sliding blocks 114 in the third sliding grooves 13, and when the second lead screws 131 rotate, the third sliding blocks 114 are driven to move in the third sliding grooves 13 along the length direction of the third sliding grooves 13; one end of the second screw 131 extends out of the second chute 111, the portal frame 1 is provided with a second servo motor 132, an output shaft of the second servo motor 132 is fixedly connected with one end of the second screw 131 extending out of the third chute 13, after the second servo motor 132 is started, the output shaft of the second servo motor 132 rotates to drive the second screw 131 to rotate, so that the third slider 114 is driven to move in the third chute 13, the cross beam 11 is driven to move in the height direction of the portal frame 1, and when materials are polished, the material polishing device can be adapted to materials with various heights by a mode of moving the cross beam 11.

The implementation principle of column type snagging machine of the embodiment of the application is: when materials are ground, the materials are firstly placed on the base 14 below the portal frame 1, then the first servo motor 113 is started to enable the connecting block 21 to move on the cross beam 11, the grinding wheel 22 can be aligned to the materials, then the second servo motor 132 is started to enable the cross beam 11 to move on the portal frame 1, the grinding wheel 22 can touch the materials, then the driving motor 52 is started, and the driving motor 52 drives the grinding wheel 22 to rotate to grind the materials; when the grinding wheel 22 needs to be replaced, the second fixing bolt 311 is firstly screwed out of the connecting block 21, then the dust cover 3 is slid, so that the dust cover 3 does not cover the grinding wheel 22 any more, then the connecting bolts 611 are screwed out of the connecting nuts 621, so that the rotating shaft 51 is not connected with the central shaft 221, finally the first fixing bolts 41 are screwed out of the connecting block 21, the connecting block 23 is taken down from the connecting block 21, the grinding wheel 22 arranged on the connecting block 23 is detached, and the effect of facilitating the detachment of the grinding wheel 22 is achieved.

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 (9)

1. The utility model provides a column type snagging machine, includes portal frame (1), it is provided with crossbeam (11) to slide on portal frame (1), be provided with grinding component (2) that are used for polishing the material on crossbeam (11), its characterized in that: grinding assembly (2) includes connecting block (21) and grinding wheel (22), connecting block (21) slide to be set up on crossbeam (11), grinding wheel (22) can be dismantled and set up on connecting block (21), still be provided with on connecting block (21) and be used for sheltering from dust cover (3) of grinding wheel (22), one side that dust cover (3) are close to connecting block (21) is provided with first slider (31), first spout (211) have been seted up on connecting block (21), first slider (31) and first spout (211) sliding fit.

2. The column type snagging machine of claim 1, wherein: the grinding wheel grinding machine is characterized in that a connecting plate (23) is arranged on the connecting block (21), vertical plates (231) are vertically arranged on the connecting plate (23), bearings (2311) are arranged on the two vertical plates (231), the grinding wheel (22) comprises a central shaft (221), two ends of the central shaft (221) are in interference fit with inner rings of the two bearings (2311) respectively, a fixing part (4) used for fixing the connecting plate (23) is arranged on the connecting block (21), one end of the central shaft (221) extends out of the vertical plates (231), and a driving part (5) is arranged at the end part of the central shaft.

3. A column snagging machine according to claim 2, characterized in that: the fixing piece (4) comprises a plurality of first fixing bolts (41), the first fixing bolts (41) are arranged on the connecting plate (23) in a penetrating mode, and a plurality of first threaded holes in threaded fit with the first fixing bolts (41) are formed in the connecting block (21).

4. A column snagging machine according to claim 2, characterized in that: the driving piece (5) comprises a rotating shaft (51), the rotating shaft (51) is rotatably arranged on a connecting block (21), a first rotating disc (511) is fixedly arranged at one end of the rotating shaft (51), a driving motor (52) is arranged on the connecting block (21), a second rotating disc (521) is arranged on an output shaft of the driving motor (52), the first rotating disc (511) and the second rotating disc (521) are connected through a belt (53), and a connecting piece (6) connected with a central shaft (221) is further arranged on the rotating shaft (51).

5. A column snagging machine according to claim 4, characterized in that: the connecting piece (6) comprises a first flange plate (61), the first flange plate (61) is fixedly arranged at one end, close to the grinding wheel (22), of the rotating shaft (51), a second flange plate (62) is fixedly arranged at one end, extending out of the vertical plate (231), of the central shaft (221), the first flange plate (61) is attached to the second flange plate (62), a plurality of connecting bolts (611) penetrate through the first flange plate (61), a plurality of connecting nuts (621) are arranged on the second flange plate (62), and the connecting bolts (611) are in threaded fit with the connecting nuts (621).

6. The column type snagging machine of claim 1, wherein: the gantry frame (1) is provided with a water delivery hose (12), and the water delivery hose (12) extends into the dust cover (3) and is wound in the dust cover (3).

7. The column type snagging machine of claim 1, wherein: a second fixing bolt (311) penetrates through the first sliding block (31), and a second threaded hole which is in threaded fit with the second fixing bolt (311) is formed in the bottom wall of the first sliding groove (211) and located on the connecting block (21).

8. The column type snagging machine of claim 1, wherein: one side, far away from the grinding wheel (22), of the connecting block (21) is provided with a second sliding block (24), a second sliding groove (111) is formed in the cross beam (11) along the length direction of the cross beam, the second sliding block (24) is in sliding fit with the second sliding groove (111), a first lead screw (112) is arranged in the second sliding groove (111) in a rotating mode, the first lead screw (112) penetrates through the second sliding block (24) and is in threaded fit with the second sliding block (24), the second sliding groove (111) extends out of one end of the first lead screw (112), a first servo motor (113) is arranged on the cross beam (11), and an output shaft of the first servo motor (113) is fixedly connected with one end, extending out of the second sliding groove (111), of the first lead screw (112).

9. The column type snagging machine of claim 1, wherein: the one side of the cross beam (11) far away from the connecting block (21) is fixedly provided with two third sliding blocks (114), two third sliding grooves (13) are formed in the portal frame (1) along the height direction of the portal frame, the third sliding blocks (114) are in sliding fit with the third sliding grooves (13), second lead screws (131) are further arranged in the third sliding grooves (13), the second lead screws (131) penetrate through the third sliding blocks (114) and are in threaded fit with the third sliding blocks (114), one ends of the second lead screws (131) extend out of the second sliding grooves (111), second servo motors (132) are arranged on the portal frame (1), and output shafts of the second servo motors (132) are fixedly connected with one ends of the second lead screws (131) extending out of the third sliding grooves (13).

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