CN213615557U

CN213615557U - Piece collection device for machining center

Info

Publication number: CN213615557U
Application number: CN202022557469.9U
Authority: CN
Inventors: 杨新雄
Original assignee: Xinchang Lianxin Intelligent Technology Co ltd
Current assignee: Xinchang Lianxin Intelligent Technology Co.,Ltd.
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-07-06
Anticipated expiration: 2030-11-06

Abstract

The utility model discloses a piece collection device for machining center, including support frame, guide fill and receipts workbin, the guide is fought spacing the fixing in the top center department of support frame, and the left and right sides that the guide was fought all is provided with spray set, receives the workbin and is located the guide and fights under, receives the workbin and is located the backup pad, and the bottom of backup pad is provided with the lift post. The utility model discloses a guide fill guide piece gets into fast and concentrates the recovery in the collecting box, improve clastic recovery rate, and adopt the spray assembly regularly to spray the watering, drench the processing to the piece, effectively avoid clastic everywhere to fly upward, more be favorable to the subsequent centralized processing of piece, spray the in-process simultaneously and can erode the lateral wall of guide fill, make the piece of gluing on the guide fill inner wall in by the shock removal collecting box, can also rinse the operation to the lateral wall of guide fill when spraying simultaneously, guarantee the subsequent normal work of guide fill.

Description

Piece collection device for machining center

Technical Field

The utility model belongs to a technical field is collected to the piece, concretely relates to piece collection device for machining center.

Background

Machining centers have evolved from numerically controlled milling machines. The numerical control milling machine is different from a numerical control milling machine in that the machining center has the capability of automatically exchanging machining tools, and the machining tools on the main shaft can be changed through the automatic tool changing device in one-time clamping by installing tools with different purposes on the tool magazine, so that multiple machining functions are realized. More chips can be generated in the processing process, and the stress direction of the chips randomly causes the chips to randomly scatter around, so that the environment of an operation workshop is poor, and the physical and mental health of operators is not facilitated.

Disclosure of Invention

The utility model aims to provide a technical scheme of a scrap collecting device for a machining center aiming at the defects of the prior art, the whole structure design is ingenious and reasonable, the practicability is strong, the application range is wide, the scraps are collected and recovered in a centralized way, the environment of an operation workshop is better, the physical and mental health of operators is more favorable, the scraps are guided to rapidly enter a material collecting box through a material guide hopper for concentrated recovery, the recovery rate of the scraps is improved, a spraying component is adopted for spraying and sprinkling regularly to wet the scraps, the scraps are effectively prevented from flying around, the subsequent concentrated treatment of the scraps is more favorable, the side wall of the material guide hopper can be washed in the spraying process, the scraps stuck on the inner wall of the material guide hopper are moved into the material collecting box by impact, and the side wall of the material guide hopper can be cleaned during spraying, guarantee the subsequent normal work of guide fill, drive the backup pad through the lift post moreover and remove and realize receiving the location joint between workbin and the guide fill, more be favorable to clastic collection to will receive workbin and guide fill separation and change after receiving workbin saturation.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a piece collection device for machining center which characterized in that: including support frame, guide fill and receipts workbin, the guide fill is spacing to be fixed in the top center department of support frame, and the left and right sides of guide fill all is provided with spray set, receives the workbin and is located the guide fill under, receives the workbin and is located the backup pad, and the top surface center department of backup pad is provided with the standing groove, backup pad and standing groove phase-match, receives the workbin joint in the standing groove, and the bottom of backup pad is provided with the lift post.

Further, the support frame includes back the type roof, supporting legs and bottom plate, the guide fill joint is in the draw-in groove of back the type roof, be provided with the limiting plate on the guide fill, the spacing support of limiting plate is on the top surface of returning the type roof, the supporting legs evenly sets up on the bottom surface four corners of returning the type roof, the bottom of four supporting legs is connected to the bottom plate, structural design is reasonable, return the top of four supporting legs of type roof connection, and the bottom of four supporting legs is connected to the bottom plate, effectively guarantee the structure steadiness of support frame, ensure that the support frame is fought to the guide, receive the firm supporting role of workbin, so that clastic concentrated collection, the guide fill joint is in the draw-in groove of returning the type roof, rethread limiting plate limit support, guarantee that the.

Further, be provided with the perforation on the limiting plate, be provided with the reference column on returning the type roof, reference column and perforation phase-match, the limiting plate is established on the reference column through the perforation cover, and the top of reference column is provided with gland nut, perforation and reference column cooperation realize the limiting plate and return accurate joint location between the type roof, spacing the compressing tightly of rethread gland nut effectively guarantees the installation fastness between limiting plate and the type roof that returns, effectively ensure the installation fastness between guide fill and the support frame, improve whole device structure steadiness, moreover this connected mode installation dismantlement is convenient.

Further, the spraying assembly comprises a spraying plate, a transverse screw rod and a driving air cylinder, an inner groove is formed in the bottom surface of the spraying plate, spraying nozzles are uniformly arranged in the inner groove, a guide rod is arranged on the spraying plate, a water inlet pipe is arranged on the top surface of the guide rod and is communicated with the inner cavity of the spraying plate through the guide rod, an extension plate is arranged at the bottom of the guide rod and is sleeved on the transverse screw rod, the driving air cylinder is connected with the transverse screw rod, the structural design is ingenious and reasonable, the inner groove is designed to integrally lift the mounting surface of the spraying nozzles, so that the spraying nozzles are prevented from being damaged in the moving process of the spraying plate, the guide rod and the spraying plate are both of a cavity structure, the interior of the guide rod is communicated with the interior of the spraying plate, so that sprayed water can be conveyed into the spraying plate through the guide rod through the, drive actuating cylinder and drive horizontal screw rod and rotate for the extension board removes along horizontal screw rod, thereby adjusts the position of spraying the board. When the operation of spraying, drive actuating cylinder and start, drive the extension board and move toward the guide fill direction, the extension board moves the synchronous displacement who sprays the board for spray the board through running through in the groove removes the guide fill, spray water and enter into the inlet tube through the hose after that, finally follow the spray nozzle blowout in entering into the spray board through the guide arm again, realize spraying the operation, after spraying, driving motor reversal, spray the board and shift out the guide fill.

Furthermore, through grooves are formed in the left side wall and the right side wall of the guide hopper, the spray plate is matched with the through grooves, auxiliary support plates are arranged on the left side and the right side of the guide hopper, the horizontal top surfaces of the auxiliary support plates are flush with the bottom surfaces of the through grooves, the design of the through grooves can facilitate the movement of the spray plate into the guide hopper during spraying operation, when the spray assembly does not work, the guide hopper moves out of the guide hopper, but the end part, close to the through grooves, of the guide hopper can be clamped in the through grooves to shield and block the through grooves, so that the guide hopper can guide and collect scraps, the design is ingenious and reasonable, the design of the auxiliary support plates plays an auxiliary supporting and stabilizing role on the spray plate, the stability during placement of the spray plate is ensured, the bottom surfaces of the spray plate are shielded when the spray plate does not work, the spray nozzles are protected, and limit folding plates are further arranged at the end parts, the design of this spacing folded plate plays limiting displacement, ensures that the spray plate just in time resets when shifting out the guide fill and touch spacing folded plate and targets in place, and the guide fill shifts out and will run through the groove complete joint simultaneously and shelter from the cavity of guide fill completely.

Further, the bottom of guide fill is provided with inserts the ring, is provided with the slot on the top surface of receipts workbin, inserts ring and slot phase-match, inserts the ring and pegs graft in the slot, and it is spacing to realize the accurate grafting of guide fill and receipts workbin through the design of inserting ring and slot for there is not the clearance between the two, makes the piece through the guide fill guide directly get into and receive the workbin, improves clastic collection rate.

Further, it passes through bracket and support frame fixed connection to drive actuating cylinder, the bottom of extension board is provided with interior spout, be provided with protruding slider on the bracket, interior spout and protruding slider phase-match, the extension board passes through inner groovy activity joint on protruding slider, the design of bracket can be convenient for spray assembly's installation place, protruding slider has been set up on the bracket simultaneously, cooperation through protruding slider and interior spout realizes the activity joint between extension board and the bracket, thereby at the extension board along horizontal screw rod removal in-process, the bottom of extension board slides along protruding slider in step all the time through interior spout, thereby make the position adjustment process that sprays the board more steady reliable, and the operation safety performance is improved.

Further, all be provided with the direction subassembly on four supporting legss, the direction subassembly includes guide bar and direction slider, is provided with the mounting groove on the supporting legs, and the guide bar is installed in the mounting groove, and direction slider movable sleeve is established on the guide bar, is provided with fixed hornblock on the direction slider, is provided with the support draw-in groove on the fixed hornblock, support draw-in groove and backup pad phase-match, the different joint in the support draw-in groove that corresponds fixed hornblock of angle all around of backup pad. Can the reciprocating of guide support board through the design of direction subassembly, make reciprocating more steady safety of backup pad, four direction subassemblies are from the angle all around of backup pad to the backup pad guide support simultaneously, make the lift post drive the oscilaltion process of backup pad more steady, the angle joint all around of backup pad is in the support draw-in groove of four fixed hornblocks, guarantee the installation steadiness between backup pad and four direction subassemblies, and fixed hornblock establishes on corresponding volume guide bar through the direction slider cover, make the backup pad remove in-process direction slider along the guide bar synchronous sliding, overall structure design is compact reasonable.

The utility model discloses owing to adopted above-mentioned technical scheme, following beneficial effect has:

the utility model has the advantages of ingenious and reasonable integral structure design, strong practicability and wide application range, can guide the scraps to quickly enter the material receiving box for centralized recovery through the material guide hopper, improves the recovery rate of the scraps, adopts the spraying component to regularly spray and spray water to wet the scraps, effectively avoids the scraps from flying around, is more favorable for the subsequent centralized treatment of the scraps, can wash the side wall of the material guide hopper during the spraying process simultaneously, ensures the scraps stuck on the inner wall of the material guide hopper to be impacted and moved into the material receiving box, can clean the side wall of the material guide hopper during the spraying process simultaneously, ensures the subsequent normal work of the material guide hopper, realizes the positioning and clamping between the material receiving box and the material guide hopper by driving the supporting plate to move through the lifting column, ensures the seamless splicing between the material receiving box and the material guide hopper, and ensures the scraps guided by the material guide hopper to directly enter the material receiving box, the collecting box is more favorable for centralized collection of the fragments, and the collecting box moves down after the collecting box is saturated, so that the collecting box and the material guide hopper are separated to replace and place a new collecting box, and the collected fragments are convenient to be subsequently treated.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic structural view of a scrap collecting device for a machining center according to the present invention;

FIG. 2 is a schematic view of the assembled structure of the material guiding hopper and the material receiving box;

FIG. 3 is a schematic view of the spraying assembly of the present invention in operation;

FIG. 4 is a schematic structural view of the material guiding hopper and the material receiving box after being separated;

FIG. 5 is a schematic view of the mounting structure of the middle support plate, the support frame and the guide assembly of the present invention;

FIG. 6 is a schematic view of the mounting structure of the fixed corner block and the supporting plate of the present invention;

FIG. 7 is a schematic view of the structure of the material guiding hopper of the present invention;

FIG. 8 is a schematic view of the installation structure of the auxiliary support plate and the material guiding hopper of the present invention;

fig. 9 is a schematic view of the installation structure of the middle guide rod and the spray plate of the present invention.

In the figure: 1-a support frame; 2-a material guide hopper; 3-a material receiving box; 4-a spray assembly; 5-a support plate; 6-placing the groove; 7-a lifting column; 8-clip top plate; 9-supporting feet; 10-a base plate; 11-a card slot; 12-a limiting plate; 13-perforating; 14-a locating post; 15-a compression nut; 16-a spray plate; 17-a transverse screw; 18-a drive cylinder; 19-inner grooves; 20-a spray nozzle; 21-a guide rod; 22-a water inlet pipe; 23-an extension plate; 24-through slots; 25-an auxiliary support plate; 26-insert ring; 27-a slot; 28-a bracket; 29-inner chute; 30-a raised slider; 31-a guide assembly; 32-a guide bar; 33-a guide slide block; 34-a mounting groove; 35-fixed corner block.

Detailed Description

As shown in figures 1 to 9, the scrap collecting device for a machining center of the utility model comprises a support frame 1, a material guiding hopper 2 and a material receiving box 3, wherein the material guiding hopper 2 is fixed at the center of the top of the support frame 1 in a limited manner, the left and right sides of the material guiding hopper 2 are provided with spraying components 4, the material receiving box 3 is positioned under the material guiding hopper 2, the material receiving box 3 is positioned on a support plate 5, the center of the top surface of the support plate 5 is provided with a placement groove 6, the support plate 5 is matched with the placement groove 6, the material receiving box 3 is clamped in the placement groove 6, the placement groove 6 can facilitate the accurate clamping and limiting of the material receiving box 3 and the support plate 5, facilitate the actual placement of the material receiving box 3, ensure that the material receiving box 3 is just positioned at the center of the support plate 5, and the material guiding hopper 2 is just positioned at the center of the support frame 1, thereby ensuring that the material receiving box 3 and, the bottom of the support plate 5 is provided with a lifting column 7.

Support frame 1 is including returning type roof 8, supporting legs 9 and

bottom plate

10, 2 joints are fought in draw-in groove 11 of returning type roof 8 to the guide, be provided with limiting plate 12 on the guide is fought 2, limiting plate 12 is spacing to be supported on the top surface of returning type roof 8, supporting legs 9 evenly set up on the bottom surface four corners of returning type roof 8, the bottom of four supporting legs 9 is connected to bottom plate 10, structural design is reasonable, return type roof 8 connects the top of four supporting legs 9, and the bottom of four supporting legs 9 is connected to bottom plate 10, effectively guarantee the structural stability of support frame 1, ensure that support frame 1 is fought 2 to the guide, receive the firm supporting role of material case 3, so that clastic concentrated collection, 2 joints are fought in draw-in groove 11 of returning type roof 8 to the guide, rethread limiting plate 12 limit support, guarantee that the joint that the guide is fought 2.

Be provided with perforation 13 on the limiting plate 12, be provided with reference column 14 on returning the type roof 8, reference column 14 and perforation 13 phase-match, limiting plate 12 establishes on reference column 14 through perforation 13 cover, and the top of reference column 14 is provided with gland nut 15, perforation 13 realizes the accurate joint location between limiting plate 12 and the type roof 8 with the cooperation of reference column 14, spacing the compressing tightly of rethread gland nut 15 effectively guarantees the mounting firmness between limiting plate 12 and the type roof 8, effectively ensure the mounting firmness between guide fill 2 and the support frame 1, improve whole device structure steadiness, and this connected mode installation dismantlement is convenient.

The spraying component 4 comprises a spraying plate 16, a transverse screw rod 17 and a driving cylinder 18, an inner groove 19 is arranged on the bottom surface of the spraying plate 16, spraying nozzles 20 are uniformly arranged in the inner groove 19, a guide rod 21 is arranged on the spraying plate 16, a water inlet pipe 22 is arranged on the top surface of the guide rod 21, the water inlet pipe 22 is connected with a water source through a hose, the water inlet pipe 22 is communicated with the inner cavity of the spraying plate 16 through the guide rod 21, an extension plate 23 is arranged at the bottom of the guide rod 21, the extension plate 23 is sleeved on the transverse screw rod 17 in a threaded manner, the driving cylinder 18 is connected with the transverse screw rod 17, the structural design is ingenious and reasonable, the mounting surface of the spraying nozzle 20 is integrally lifted through the design of the inner groove 19, so that the spraying nozzle 20 is prevented from being damaged in the moving process of the spraying plate 16, the guide rod 21 and the inside of the spraying plate 16 are both in a cavity structure, the inside of, and then the spray is sprayed out from the spray nozzle 20, the extension plate 23 is sleeved on the transverse screw 17, and the driving cylinder 18 drives the transverse screw 17 to rotate, so that the extension plate 23 moves along the transverse screw 17, and the position of the spray plate 16 is adjusted. When spraying operation is needed, the driving cylinder 18 is started to drive the extension plate 23 to move towards the guide hopper 2, the extension plate 23 drives the synchronous displacement of the spray plate 16, so that the spray plate 16 moves into the guide hopper 2 through the through groove 24, sprayed water enters the water inlet pipe 22 through the hose and finally enters the spray plate 16 through the guide rod 21 and finally is sprayed out from the spray nozzle 20, spraying operation is achieved, after spraying is finished, the driving motor rotates reversely, and the spray plate 16 moves out of the guide hopper 2.

Through grooves 24 are formed in the left side wall and the right side wall of the guide hopper 2, the spray plate 16 is matched with the through grooves 24, auxiliary support plates 25 are arranged on the left side wall and the right side wall of the guide hopper 2, the horizontal top surfaces of the auxiliary support plates 25 are flush with the bottom surfaces of the through grooves 24, the through grooves 24 are designed to facilitate the movement of the spray plate 16 into the guide hopper 2 during spraying operation, when the spraying assembly 4 does not work, the guide hopper 2 moves out of the guide hopper 2 but the end part of the guide hopper 2 close to the through grooves 24 is clamped in the through grooves 24 to shield and block the through grooves 24, so that the guide and collection of the guide hopper 2 on scraps are facilitated, the scraps from the through grooves 24 are effectively avoided, the collection rate is improved, the design is ingenious and reasonable, the auxiliary support plates 25 play an auxiliary supporting and stabilizing role in the spray plate 16, the stability during the placement of the spray plate 16 is ensured, and the bottom surface of the spray plate 16 is shielded, the spraying nozzle 20 is protected, and the end part of the auxiliary support plate 25 far away from the through groove 24 is provided with a limit folded plate, the limit folded plate is designed to play a limiting role, so that the spraying plate 16 is ensured to be rightly reset when the spraying plate is moved out of the material guide hopper 2 and touches the limit folded plate, the material guide hopper 2 is completely moved out of the cavity of the material guide hopper 2, and the material guide hopper 2 is completely clamped and shielded by the through groove 24.

The bottom of guide fill 2 is provided with inserts ring 26, is provided with slot 27 on the top surface of receipts workbin 3, inserts ring 26 and slot 27 phase-match, inserts ring 26 and pegs graft in slot 27, and the design through inserting ring 26 and slot 27 realizes that guide fill 2 is spacing with the accurate grafting of receipts workbin 3 for there is not the clearance between the two, makes the piece through guide fill 2 guide directly get into receipts workbin 3, improves clastic collection rate.

Drive actuating cylinder 18 and pass through bracket 28 and support frame 1 fixed connection, the bottom of extension board 23 is provided with interior spout 29, be provided with protruding slider 30 on the bracket 28, interior spout 29 and protruding slider 30 phase-match, extension board 23 passes through inner groovy 19 activity joint on protruding slider 30, the design of bracket 28 can be convenient for the installation of spray assembly 4 and place, protruding slider 30 has been set up on the bracket 28 simultaneously, realize the activity joint between extension board 23 and the bracket 28 through protruding slider 30 and interior spout 29's cooperation, thereby at extension board 23 along horizontal screw 17 removal in-process, the bottom of extension board 23 slides along protruding slider 30 synchronization all the time through interior spout 29, thereby make the position adjustment process of spray board 16 more steady reliable, improve four high operation safety performance.

All be provided with direction subassembly 31 on four supporting legss 9, direction subassembly 31 includes guide bar 32 and direction slider 33, be provided with mounting groove 34 on the supporting legss 9, guide bar 32 is installed in mounting groove 34, direction slider 33 activity cover is established on guide bar 32, be provided with fixed hornblock 35 on the direction slider 33, be provided with the support draw-in groove on the fixed hornblock 35, support draw-in groove and 5 phase-matchs of backup pad, the different joints of angle all around of backup pad 5 are in the support draw-in groove that corresponds fixed hornblock 35. Can guide reciprocating of backup pad 5 through the design of direction subassembly 31, make reciprocating more steady safety of backup pad 5, four direction subassemblies 31 guide simultaneously to backup pad 5 from backup pad 5 angle all around and support, make lift post 7 drive the oscilaltion process of backup pad 5 more steady, the angle joint all around of backup pad 5 is in the support draw-in groove of four fixed hornblocks 35, guarantee the installation steadiness between backup pad 5 and four direction subassemblies 31, and fixed hornblock 35 overlaps through direction slider 33 cover and establishes on corresponding volume guide bar 32, make backup pad 5 remove in-process direction slider 33 slide along guide bar 32 in step, overall structure design is compact reasonable.

The utility model has the advantages of ingenious and reasonable integral structure design, strong practicability and wide application range, the scraps are guided to rapidly enter the material receiving box 3 through the material guide hopper 2 for centralized recovery, the recovery rate of the scraps is improved, the spraying component 4 is adopted for regularly spraying and sprinkling water to wet the scraps, the scraps are effectively prevented from flying around, the subsequent centralized treatment of the scraps is more facilitated, the side wall of the material guide hopper 2 can be washed away in the spraying process, the scraps stuck on the inner wall of the material guide hopper 2 are impacted and moved into the material receiving box 3, the side wall of the material guide hopper 2 can be cleaned during the spraying process, the subsequent normal work of the material guide hopper 2 is ensured, the lifting column 7 drives the support plate 5 to move to realize the positioning clamping between the material receiving box 3 and the material guide hopper 2, the material receiving box 3 is seamlessly spliced with the material guide hopper 2, and the scraps guided by the material guide hopper 2 can directly enter the material receiving box 3, more be favorable to clastic concentrated collection to move down material collecting box 3 after material collecting box 3 saturates, make material collecting box 3 and guide 2 separation carry out the change of new material collecting box 3 and place, also be convenient for to the clastic follow-up processing after the collection.

The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present invention to achieve substantially the same technical effects are all covered by the scope of the present invention.

Claims

1. The utility model provides a piece collection device for machining center which characterized in that: including support frame, guide fill and receipts workbin, the guide fill is spacing to be fixed the top center department of support frame, the left and right sides of guide fill all is provided with spray set, receive the workbin and be located under the guide fill, it is located the backup pad to receive the workbin, the top surface center department of backup pad is provided with the standing groove, the backup pad with the standing groove phase-match, it is in to receive the workbin joint in the standing groove, the bottom of backup pad is provided with the lift post.

2. The chip collecting device for a machining center according to claim 1, wherein: the support frame includes back type roof, supporting legs and bottom plate, the guide fill joint is in the draw-in groove of back type roof, be provided with the limiting plate on the guide fill, the limiting plate is spacing to be supported on the top surface of back type roof, the supporting legs evenly sets up on the bottom surface four corners of back type roof, four are connected to the bottom plate the bottom of supporting legs.

3. The chip collecting device for a machining center according to claim 2, wherein: the limiting plate is provided with a through hole, the hollow top plate is provided with a positioning column, the positioning column is matched with the through hole, the limiting plate is sleeved on the positioning column through the through hole, and the top end of the positioning column is provided with a compression nut.

4. The chip collecting device for a machining center according to claim 1, wherein: the spray assembly comprises a spray plate, a transverse screw rod and a driving cylinder, an inner groove is formed in the bottom surface of the spray plate, a spray nozzle is uniformly arranged in the inner groove, a guide rod is arranged on the spray plate, a water inlet pipe is arranged on the top surface of the guide rod, the water inlet pipe passes through the guide rod and the inner cavity of the spray plate are communicated, an extension plate is arranged at the bottom of the guide rod, the extension plate is sleeved with a thread sleeve on the transverse screw rod, and the driving cylinder is connected with the transverse screw rod.

5. The chip collecting device for a machining center according to claim 4, wherein: the left side wall and the right side wall of the material guide hopper are provided with through grooves, the spraying plates are matched with the through grooves, the left side wall and the right side wall of the material guide hopper are provided with auxiliary support plates, and the horizontal top surfaces of the auxiliary support plates are flush with the bottom surfaces of the through grooves.

6. The chip collecting device for a machining center according to claim 4, wherein: drive actuating cylinder pass through the bracket with support frame fixed connection, the bottom of extending the board is provided with interior spout, be provided with protruding slider on the bracket, interior spout with protruding slider phase-match, the extension board passes through interior recess activity joint in on the protruding slider.

7. The chip collecting device for a machining center according to claim 1, wherein: the bottom of guide fill is provided with inserts the ring, be provided with the slot on the top surface of receiving the workbin, insert the ring with the slot phase-match, insert the ring grafting in the slot.

8. The chip collecting device for a machining center according to claim 2, wherein: four all be provided with the direction subassembly on the supporting legs, the direction subassembly includes guide bar and direction slider, be provided with the mounting groove on the supporting legs, the guide bar is installed in the mounting groove, direction slider movable sleeve is established on the guide bar, be provided with fixed hornblock on the direction slider, be provided with the support draw-in groove on the fixed hornblock, the support draw-in groove with the backup pad phase-match, the different joints of angle all around of backup pad are in corresponding in the support draw-in groove of fixed hornblock.