CN112934968B

CN112934968B - Continuous multiple rolling equipment for automobile parts

Info

Publication number: CN112934968B
Application number: CN202110132115.6A
Authority: CN
Inventors: 杜平
Original assignee: Dongguan City Huayuansheng Hardware Products Co ltd
Current assignee: Dongguan Yanta Intelligent Technology Co ltd
Priority date: 2021-01-31
Filing date: 2021-01-31
Publication date: 2022-12-06
Anticipated expiration: 2041-01-31
Also published as: CN112934968A

Abstract

The invention relates to the technical field of automobile part machining, and discloses continuous multiple rolling equipment for automobile parts, which comprises a rack, wherein a fixed plate is welded on the left side of the rack, a control plate is fixedly installed at the front part of the fixed plate, a feeding frame is welded on the upper surface of a connecting frame, a transposition mechanism is arranged in the rack, a connecting bottom plate is welded on the right side of the rack, a clamping mechanism is arranged at the left end of a telescopic shaft, and a steering mechanism is arranged on the inner wall of the rack. This auto parts's rolling equipment in succession many times carries out the right side through the telescopic shaft and moves, and when the telescopic shaft moved to the right side, two spacing slide bars above the telescopic shaft can get into the swivelling chute inside of steering sleeve, come the rotation of raw materials degree of proceeding with, then roll the operation again to realize automatic continuous rolling operation, make in the rolling process, a roll alright with solving, the effectual quantity that reduces the roll has practiced thrift the cost of production and processing.

Description

Continuous multiple rolling equipment for automobile parts

Technical Field

The invention relates to the technical field of automobile part machining, in particular to continuous and repeated rolling equipment for automobile parts.

Background

In the current industry, metal is often required to be rolled to meet the requirements of the shape of the metal to be used, so that the function required by the use of the rolled metal is achieved.

On the other hand, if a plurality of groups of rollers are installed on a processing line, the installation space is undoubtedly greatly increased, the processing production cost is improved, and meanwhile, the maintenance process is relatively complicated due to excessive equipment, so that the continuous multi-rolling equipment for the automobile parts is provided to solve the problem.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides continuous and repeated rolling equipment for automobile parts, which solves the problems of excessive roller installation, limited space utilization and overhigh cost when multiple groups of rolling are carried out by the conventional rolling equipment.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a rolling equipment many times in succession of auto parts, includes the frame, the left side welding of frame has the fixed plate, the anterior fixed mounting of fixed plate has the control panel, the left side welding of fixed plate has the link, the last skin weld of link has the feeding frame, the internal plant of frame has transposition mechanism, the right side welding of frame has the connecting bottom plate, the left side sliding connection of connecting the bottom plate has the hydro-cylinder seat, the left side of hydro-cylinder seat is rotated and is connected with flexible hydro-cylinder, the end fixedly connected with telescopic shaft that stretches out of flexible hydro-cylinder, the left end of telescopic shaft is provided with to press from both sides and gets the mechanism, the inner wall of frame is provided with steering mechanism, the fixed surface of fixed plate installs driving motor, driving motor's the end fixedly connected with roll mould that stretches out.

Preferably, the number of the roll dies is two, the surfaces of the roll dies are fixedly connected with connecting gears, and the surfaces of the two connecting gears are meshed with each other.

Preferably, the inside fixed mounting of frame has the cylinder that resets, the end that stretches out of the cylinder that resets bonds there is the cylinder gasket, the upper surface welding of frame has the spacing, the bottom fixedly connected with of frame receives the work or material rest.

Preferably, steering mechanism includes the pinion rack, the both sides fixed connection of pinion rack is on the surface of frame, the upper surface meshing of frame has the steering sleeve, the inner wall of steering sleeve and the sliding surface connection of telescopic shaft, the sliding surface connection of telescopic shaft has the stop collar, the lower surface welding of stop collar has the carriage.

Preferably, the inner wall of the limiting sleeve is provided with a sliding groove, the inner wall of the steering sleeve is respectively welded with a rotating groove and a straight groove, and the depth of the rotating groove is smaller than that of the straight groove.

Preferably, the inside sliding connection of telescopic shaft has two spacing slide bars, and fixedly connected with shrink spring between two spacing slide bars, and shrink spring is located the inside of telescopic shaft.

Preferably, press from both sides and get the mechanism including pressing from both sides tight hydro-cylinder, the end fixedly connected with set-square that stretches out of tight hydro-cylinder, the surperficial sliding connection of set-square has splint, the inside fixedly connected with dwang of splint, the both ends of dwang are rotated and are connected with the support frame, the right side welding of support frame is on the surface of telescopic shaft, the right-hand member fixed connection of tight hydro-cylinder is in the left side of telescopic shaft, the last skin weld of splint has connecting spring, connecting spring's top fixed connection is on the surface of support frame, the double-layered groove has been seted up on the surface of splint.

Preferably, the transposition mechanism comprises a sliding box, the two sides of the sliding box are welded on the inner wall of the rack, the surface of the sliding box is connected with the inner wall of the sliding frame in a sliding mode, a transposition spring is sleeved on the surface of the sliding box, the rear end of the transposition spring is fixedly connected with the front portion of the sliding frame, a limiting block is welded on the surface of the sliding frame, a sliding plate is connected inside the limiting block in a sliding mode, a support plate is welded on the surface of the sliding plate, a rotating sleeve is welded on the top of the support plate, and the inner wall of the rotating sleeve is connected with the surface of the telescopic shaft in a rotating mode.

Preferably, the inside sliding connection of slide box has the clamp plate, the fixed surface of clamp plate is connected with some baffles, the bottom welding of clamp plate has supporting spring, the bottom welding of supporting spring is at the inside diapire of slide box.

Compared with the prior art, the invention provides continuous multiple rolling equipment for automobile parts, which has the following beneficial effects:

1. this auto parts's rolling equipment many times in succession moves to the right through the telescopic shaft, when the telescopic shaft moves to the right, two spacing slide bars above the telescopic shaft can get into the rotary groove of steering sleeve inside, come to carry out 90 degrees rotations to the raw materials, then roll the operation again to realize automatic continuous rolling operation, make in the rolling process, a roll alright with the solution, the effectual quantity that reduces the roll has practiced thrift the cost of production and processing, reduces installation space.

2. This rolling equipment in succession many times of auto parts is through the quartic rotation transposition removal to the work piece for the work piece can carry out the upset transposition of continuous quartic, thereby realizes rolling four faces of raw materials, has improved the whole versatility of equipment, and it is more comprehensive to roll.

3. This auto parts's rolling equipment many times in succession through the extension of control clamp hydro-cylinder, through the sliding contact of set-square and two splint for two close that the set-square is tight, realize getting the effect of the quick clamp of raw materials, make in the rolling in-process of processing, can carry out the snatching of mechanical type, thereby the effect of getting is carried out to the work piece of convenience in some hot rolling processes.

4. This auto parts's rolling equipment many times in succession through the telescopic shaft back-and-forth movement in-process, will drive the meshing of turning to cover and pinion rack, and removal at every turn makes to turn to the cover and also can advance corresponding rotation for spacing slide bar can carry out the inside that enters into the swivelling chute for the second time and turn to, makes next rotatory rolling, can be effectively stable going on, improve equipment's overall stability.

5. This auto parts's rolling equipment in succession many times through the extension of control cylinder that resets, will promote whole link and reset, because design into triangle-shaped with the baffle, so when reseing forward, the baffle receives the extrusion of carriage this moment, will contract to the inside of sliding box automatically to the realization is to the effect that resets of integrated device, realizes automatic rolling operation, comes the rolling efficiency of further improvement work piece.

Drawings

FIG. 1 is a schematic view of the overall structure of a continuous multi-pass rolling facility for automobile parts according to the present invention;

FIG. 2 is a schematic view of the connection of the frame of a continuous multi-pass rolling installation for motor vehicle parts according to the invention;

FIG. 3 is a schematic view of two roll dies of a continuous multi-pass rolling apparatus for automobile parts according to the present invention;

FIG. 4 is a schematic structural view of a cylinder block of a continuous multiple rolling apparatus for automobile parts according to the present invention;

FIG. 5 is a schematic view of a steering mechanism of a continuous multi-pass rolling mill for automobile parts according to the present invention;

FIG. 6 is a schematic view of a steering sleeve structure of a continuous multiple rolling device for automobile parts according to the present invention;

FIG. 7 is a schematic view of the connection of two limiting sliding rods of a continuous multiple rolling apparatus for automobile parts according to the present invention;

FIG. 8 is a schematic view of a clamping mechanism of a continuous multi-pass rolling apparatus for automobile parts according to the present invention;

fig. 9 is a schematic diagram of the shifting mechanism of the continuous multiple rolling equipment for automobile parts according to the present invention.

In the figure: 1. a frame; 2. a control panel; 3. a connecting frame; 4. a feeding frame; 5. a fixing plate; 6. a steering mechanism; 601. a toothed plate; 602. a steering sleeve; 603. a limiting slide bar; 604. a limiting sleeve; 605. a sliding groove; 606. a carriage; 607. a retraction spring; 608. a straight groove; 609. a rotating tank; 7. a gripping mechanism; 71. clamping the oil cylinder; 72. a support frame; 73. a splint; 74. a set square; 75. rotating the rod; 76. a clamping groove; 77. a connecting spring; 8. a transposition mechanism; 801. a slide box; 802. rotating the sleeve; 803. a mounting plate; 804. a sliding plate; 805. a limiting block; 806. a baffle plate; 807. pressing a plate; 808. a support spring; 809. a transposition spring; 9. connecting the bottom plate; 10. a cylinder block; 11. a telescopic oil cylinder; 12. a reset cylinder; 13. a cylinder liner; 14. a drive motor; 15. a roller die; 16. a connecting gear; 17. a telescopic shaft; 18. a limiting frame; 19. a material collecting frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, a continuous multiple rolling device for automobile parts comprises a frame 1, a fixed plate 5 is welded on the left side of the frame 1, a control plate 2 is fixedly installed on the front portion of the fixed plate 5, a connecting frame 3 is welded on the left side of the fixed plate 5, a feeding frame 4 is welded on the upper surface of the connecting frame 3, a transposition mechanism 8 is arranged inside the frame 1, a connecting bottom plate 9 is welded on the right side of the frame 1, an oil cylinder seat 10 is slidably connected on the left side of the connecting bottom plate 9, a telescopic oil cylinder 11 is rotatably connected on the left side of the oil cylinder seat 10, a telescopic shaft 17 is fixedly connected to the extending end of the telescopic oil cylinder 11, a clamping mechanism 7 is arranged at the left end of the telescopic shaft 17, a steering mechanism 6 is arranged on the inner wall of the frame 1, a driving motor 14 is fixedly installed on the surface of the fixed plate 5, and a roller mold 15 is fixedly connected to the extending end of the driving motor 14.

In this embodiment, the number of the roll dies 15 is two, the connecting gears 16 are fixedly connected to the surfaces of the roll dies 15, the surfaces of the two connecting gears 16 are meshed with each other, the number of the rolls is reduced by arranging four press dies on one roll die 15, so that the space is saved, and the two gears are meshed to rotate, so that the two roll dies 15 rotate relatively to roll a workpiece.

Further, the inside fixed mounting of frame 1 has reset cylinder 12, the end that stretches out of reset cylinder 12 bonds there is cylinder gasket 13, the upper surface welding of frame 1 has spacing 18, the bottom fixedly connected with of frame 1 receives work or material rest 19, through the extension of control reset cylinder 12, will promote whole carriage 606 and reset, because design baffle 806 into triangle-shaped, so when reseing forward, baffle 806 receives the extrusion of carriage 606 this moment, will contract to the inside of slip case 801 automatically, thereby realize the effect of reseing to whole.

Furthermore, the steering mechanism 6 comprises a toothed plate 601, two sides of the toothed plate 601 are fixedly connected to the surface of the machine frame 1, a steering sleeve 602 is meshed to the upper surface of the toothed plate 601, the inner wall of the steering sleeve 602 is connected with the surface of the telescopic shaft 17 in a sliding manner, a limiting sleeve 604 is connected to the surface of the telescopic shaft 17 in a sliding manner, a sliding frame 606 is welded to the lower surface of the limiting sleeve 604, after the telescopic shaft 17 rotates for 90 degrees, two limiting sliding rods 603 can rotate for 90 degrees along with the telescopic shaft, and in order to continuously perform rotary transposition, the toothed plate 601 is arranged.

In addition, the inner wall of the limiting sleeve 604 is provided with a sliding groove 605, the inner wall of the steering sleeve 602 is respectively welded with a rotating groove 609 and a straight groove 608, the depth of the rotating groove 609 is smaller than that of the straight groove 608, and the rotating groove 609 and the straight groove 608 are arranged to have different depths, so that when the limiting sliding rod 603 moves out and needs to extend, the limiting sliding rod can directly slide into the straight groove 608 which is a little deep under the outward supporting force of the contraction spring 607, and can not enter the rotating groove 609 when extending, and the situation of rotary reset when extending can be prevented.

Besides, the two limit sliding rods 603 are slidably connected inside the telescopic shaft 17, the contraction spring 607 is fixedly connected between the two limit sliding rods 603, the contraction spring 607 is located inside the telescopic shaft 17, the two limit sliding rods 603 enter the rotating groove 609 of the steering sleeve 602, and the rotating groove 609 is designed to be in a 90-degree spiral shape, so that when the telescopic shaft 17 contracts, the telescopic shaft will rotate 90 degrees to rotate the raw material 90 degrees, and automatic rotary rolling operation is realized.

Referring to fig. 8-9, the clamping mechanism 7 includes a clamping cylinder 71, a triangle 74 is fixedly connected to an extending end of the clamping cylinder 71, a clamp plate 73 is slidably connected to a surface of the triangle 74, a rotating rod 75 is fixedly connected to an inside of the clamp plate 73, two ends of the rotating rod 75 are rotatably connected to a support 72, a right side of the support 72 is welded to a surface of the telescopic shaft 17, a right end of the clamping cylinder 71 is fixedly connected to a left side of the telescopic shaft 17, a connecting spring 77 is welded to an upper surface of the clamp plate 73, a top end of the connecting spring 77 is fixedly connected to a surface of the support 72, a clamping groove 76 is formed in the surface of the clamp plate 73, and by controlling an extension of the clamping cylinder 71, through sliding contact of the triangle 74 and the two clamp plates 73, the two triangle 74 are tightly closed, so as to achieve an effect of fast clamping of a raw material, so that mechanical clamping can be performed in a processing and rolling process, thereby facilitating a hot rolling effect of clamping a workpiece in some processes.

In this embodiment, the transposition mechanism 8 includes a sliding box 801, two sides of the sliding box 801 are welded on the inner wall of the rack 1, the surface of the sliding box 801 is slidably connected on the inner wall of the sliding frame 606, a transposition spring 809 is sleeved on the surface of the sliding box 801, the rear end of the transposition spring 809 is fixedly connected with the front portion of the sliding frame 606, a limiting block 805 is welded on the surface of the sliding frame 606, a sliding plate 804 is slidably connected inside the limiting block 805, a support plate 803 is welded on the surface of the sliding plate 804, a rotating sleeve 802 is welded on the top of the support plate 803, the inner wall of the rotating sleeve 802 is rotatably connected with the surface of the telescopic shaft 17, when the telescopic shaft 17 is contracted, the sliding plate 804 is driven to move to the right through the connection of the rotating sleeve 802 and the support plate 803, the sliding plate 804 moves to the inside of the sliding box 801 with the upper surface of the pressing plate 807 to move to the right, and then the whole sliding box 606 is under the elastic force of the transposition spring 809 to transpose the position of the second baffle 806, so as to realize the automatic transposition effect, without manual operation, the structure is simple, and the cost is effectively saved in labor investment, thereby reducing the cost.

It is worth noting that, the inside sliding connection of slide box 801 has the clamp plate 807, the fixed surface of clamp plate 807 is connected with some baffle 806, the bottom welding of clamp plate 807 has supporting spring 808, the bottom welding of supporting spring 808 is at the inside diapire of slide box 801, supporting spring 808 through the design can be fine provide elasticity to clamp plate 807, make the device when shifting, clamp plate 807 and baffle 806 shift down and provide and give way, make the raw materials can get into on the second rolling station automatically, carry out the counterpoint rolling of second time, and is convenient and fast.

The working principle is that firstly, a raw material to be rolled is placed at the position of the feeding frame 4, then the movement of the telescopic oil cylinder 11 is controlled, when the telescopic oil cylinder 11 extends leftwards, the clamping mechanism 7 extends into the position of the raw material through the left movement of the telescopic shaft 17, when the raw material is positioned between the two clamping plates 73, the extension of the clamping oil cylinder 71 is controlled at the moment, the two triangular plates 74 are tightly closed through the sliding contact of the triangular plates 74 and the two clamping plates 73, so as to clamp the raw material, when the clamping is completed, in the contraction process of the telescopic oil cylinder 11, when the raw material is contracted between the two roller dies 15, at the moment, the driving motor 14 rotates by 270 degrees along with the contraction of the telescopic shaft 17, so that the raw material can be rolled in the roller dies 15, and when the telescopic oil cylinder 11 continues to contract after the rolling, the telescopic shaft 17 is driven to move rightwards, when the telescopic shaft 17 moves rightwards, the two limit sliding rods 603 on the telescopic shaft 17 enter the rotating groove 609 of the steering sleeve 602, because the rotating groove 609 is designed to be in a 90-degree spiral shape, when the telescopic shaft 17 contracts, the 90-degree rotation is carried out to rotate the raw material by 90 degrees, then the rolling operation is carried out again, when the two limit sliding rods 603 come out from the right side of the steering sleeve 602, the telescopic cylinder 11 contracts and turns to the completion, because the depth of the rotating groove 609 is different from that of the straight groove 608, when the limit sliding rods 603 move out from the left side, when the limit sliding rods 603 extend, the outward supporting force of the contraction spring 607 directly slides to the straight groove 608 with a little depth, so that the limit sliding rods cannot enter the rotating groove 609 during extension, the rotary reset during extension is prevented, and simultaneously, when the telescopic shaft 17 contracts, the rotating sleeve 802 is driven to move to the right, the rotating sleeve 802 is connected with the support plate 803 to drive the sliding plate 804 to move right, the sliding plate 804 moves right to be in sliding contact with the upper surface of the pressing plate 807 and to be pressed down, after the pressing plate 807 is completely pressed down by the sliding plate 804, the baffle 806 also moves down to enter the sliding box 801, then the whole sliding frame 606 is under the elastic action of the transposition spring 809 to transpose the whole workpiece to the position of the next baffle 806, the four baffles 806 correspond to the four pressing dies of the roller die 15, after the sliding frame 606 is transposed, the workpiece rolled for the first time is directly transposed to the second station to realize the effect of automatic transposition, and the four pressing dies are arranged on the roller die 15, so that the effect of continuously switching rolling of the four surfaces of the workpiece can be well realized, the overall versatility of the device is improved, and in the process of rolling the workpiece, the automatic transposition and the rotation can be realized, the rolling in multiple aspects can be realized, only one roller is needed, the number of rollers is effectively reduced, the production and processing cost is saved, finally, after the telescopic shaft 17 rotates for 90 degrees, the two limiting slide rods 603 can also rotate for 90 degrees, in order to set continuous rotary transposition, the toothed plate 601 is arranged, when a workpiece is transferred to a second rolling station, the telescopic shaft 17 can drive the steering sleeve 602 to be meshed with the toothed plate 601 in the back-and-forth movement process, the number of teeth of the toothed plate 601 can be accurately set, each movement enables the steering sleeve 602 to also rotate for 90 degrees, the next rotary rolling can be effectively and stably carried out, the limiting frame 18 is arranged to well limit the left-right displacement of the steering sleeve 602, and the freedom degree of the steering sleeve 602 can only move in the front-back direction, with this reciprocal, when rolling for the fourth time, this moment, clamping cylinder 71 loosens, and the work piece that later passes through the rolling for the fourth time will drop to the position of receiving the material frame 19, realizes unmanned collection, and the extension of control reset cylinder 12 later will promote whole carriage 606 and reset, because with baffle 806 design triangle-shaped, so when reseing forward, baffle 806 receives the extrusion of carriage 606 this moment, will contract to the inside of sliding box 801 automatically to the realization is to holistic effect that resets. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Claims

1. A continuous multiple rolling plant for automobile parts, comprising a stand (1), characterized in that: the automatic feeding device is characterized in that a fixed plate (5) is welded on the left side of the rack (1), a control plate (2) is fixedly mounted at the front part of the fixed plate (5), a connecting frame (3) is welded on the left side of the fixed plate (5), a feeding frame (4) is welded on the upper surface of the connecting frame (3), a transposition mechanism (8) is arranged inside the rack (1), a connecting base plate (9) is welded on the right side of the rack (1), an oil cylinder seat (10) is slidably connected on the left side of the connecting base plate (9), a telescopic oil cylinder (11) is rotatably connected on the left side of the oil cylinder seat (10), a telescopic shaft (17) is fixedly connected at the extending end of the telescopic oil cylinder (11), a clamping mechanism (7) is arranged at the left end of the telescopic shaft (17), a steering mechanism (6) is arranged on the inner wall of the rack (1), a driving motor (14) is fixedly mounted on the surface of the fixed plate (5), and a rolling die (15) is fixedly connected at the extending end of the driving motor (14);

the number of the roller dies (15) is two, the surfaces of the roller dies (15) are fixedly connected with connecting gears (16), and the surfaces of the two connecting gears (16) are meshed with each other;

a reset cylinder (12) is fixedly mounted inside the rack (1), a cylinder gasket (13) is bonded at the extending end of the reset cylinder (12), a limiting frame (18) is welded on the upper surface of the rack (1), and a material receiving frame (19) is fixedly connected to the bottom of the rack (1);

the steering mechanism (6) comprises a toothed plate (601), two sides of the toothed plate (601) are fixedly connected to the surface of the rack (1), a steering sleeve (602) is meshed with the upper surface of the rack (1), the inner wall of the steering sleeve (602) is in sliding connection with the surface of the telescopic shaft (17), a limiting sleeve (604) is in sliding connection with the surface of the telescopic shaft (17), and a sliding frame (606) is welded to the lower surface of the limiting sleeve (604);

the inner wall of the limiting sleeve (604) is provided with a sliding groove (605), the inner wall of the steering sleeve (602) is respectively welded with a rotating groove (609) and a straight groove (608), and the depth of the rotating groove (609) is smaller than that of the straight groove (608);

two limiting sliding rods (603) are slidably connected inside the telescopic shaft (17), a contraction spring (607) is fixedly connected between the two limiting sliding rods (603), and the contraction spring (607) is positioned inside the telescopic shaft (17);

the clamping mechanism (7) comprises a clamping oil cylinder (71), a triangular plate (74) is fixedly connected to the extending end of the clamping oil cylinder (71), a clamping plate (73) is connected to the surface of the triangular plate (74) in a sliding mode, a rotating rod (75) is fixedly connected to the inner portion of the clamping plate (73), supporting frames (72) are rotatably connected to the two ends of the rotating rod (75), the right sides of the supporting frames (72) are welded to the surface of the telescopic shaft (17), the right end of the clamping oil cylinder (71) is fixedly connected to the left side of the telescopic shaft (17), a connecting spring (77) is welded to the upper surface of the clamping plate (73), the top end of the connecting spring (77) is fixedly connected to the surface of the supporting frame (72), and a clamping groove (76) is formed in the surface of the clamping plate (73);

the transposition mechanism (8) comprises a sliding box (801), two sides of the sliding box (801) are welded on the inner wall of the rack (1), the surface of the sliding box (801) is connected with the inner wall of the sliding frame (606) in a sliding mode, a transposition spring (809) is sleeved on the surface of the sliding box (801), the rear end of the transposition spring (809) is fixedly connected with the front portion of the sliding frame (606), a limiting block (805) is welded on the surface of the sliding frame (606), a sliding plate (804) is connected inside the limiting block (805) in a sliding mode, a support plate (803) is welded on the surface of the sliding plate (804), a rotating sleeve (802) is welded on the top of the support plate (803), and the inner wall of the rotating sleeve (802) is connected with the surface of the telescopic shaft (17) in a rotating mode;

the inner portion of the sliding box (801) is connected with a pressing plate (807) in a sliding mode, the surface of the pressing plate (807) is fixedly connected with a baffle (806), a supporting spring (808) is welded to the bottom of the pressing plate (807), and the bottom of the supporting spring (808) is welded to the bottom wall of the inner portion of the sliding box (801).