CN218692975U - Multifunctional combined punch press for processing automobile starter stator casing - Google Patents

Abstract

The utility model provides a processing automobile starter stator casing's many function combination punch press, belong to automobile starter stator technical field, overcome prior art to existing bump and breach and round hole punching press needs many stamping device and the problem that height and angle can not quick adjustment, characterized by install first annular fixed plate, second annular fixed plate and third annular fixed plate in proper order from inside to outside on the upper surface of board backing plate, and corresponding interior annular groove and outer annular groove of forming, install cantilever type punching press mechanism at first annular fixed plate, the upper surface of second annular fixed plate and third annular fixed plate, beneficial effect is that after installing removable drift and adjusting angle and height on a combination punch press, only need a punching press process, can accomplish the punching press work of spacing bump on the stator casing simultaneously, location bump and upper end face rectangular groove, lower extreme face rectangular groove, the wire draws forth the hole, drain valve mounting hole and U-shaped groove, machining efficiency and machining precision have further been improved.

Description

Multifunctional combined punch press for processing automobile starter stator casing

Technical Field

The utility model belongs to the technical field of automobile starter stator, in particular to many function combination punch press of processing automobile starter stator casing.

Background

In the prior art, an automobile starter shell bump stamping forming die is used for processing the bump forming of a starter shell in the prior art, but the processing of a plurality of bumps needs a plurality of processes, namely in the processing process, the automobile starter shell bump stamping forming die can only stamp one bump at a time, the processing of the plurality of bumps needs to rotate a workpiece to be processed (namely the automobile starter shell) for a plurality of times, if 6 bumps exist, the workpiece needs to be rotated for 6 times, and the stamping can be completed for 6 times, so that the processing efficiency is low, and the positioning precision is poor. In order to solve the problem, the applicant discloses "a many bumps one shot forming hydraulic extrusion machine of automobile starter casing" in the utility model with application number CN201320809557.0, this utility model overcomes a plurality of bump processing need the multichannel process to be accomplished, and machining efficiency is low, and the poor problem of positioning accuracy can once accomplish 6 bump processing, and machining efficiency is high, and fixes a position the accuracy, has improved production efficiency, has reduced manufacturing cost. However, although this utility model can once accomplish 6 bump processing, because this utility model is through installing 6 gliding chuck sliders on the chuck seat, install T type terrace die respectively in 6 chuck sliders, T type terrace die pushes down the location through punch holder, consequently, 6T type terrace die can only once accomplish the processing at 6 bumps of same height at same horizontal position, can not satisfy the needs that have the casing processing of the bump of co-altitude not.

Among the prior art, be equipped with 6 spacing bumps of brush yoke and 2 brush yoke location bumps on the automobile starter stator casing in addition, 6 spacing bumps of brush yoke and 2 brush yoke location bumps need use 2 punching machines to punch press respectively, and machining efficiency is low, and the machining precision is relatively poor, has size error, influences product quality. In order to solve the problem, the applicant discloses "brush yoke bump stamping device of automobile starter stator casing" in utility model with application number CN201621091777.4, this utility model installs 2 brush yoke bump stamping devices on an automatic stamping line during use, install the spacing bump mould of brush yoke on one of them stamping device, can once stamp out the spacing bump of 6 brush yokes, install brush yoke location bump mould on another stamping device, can once stamp out 2 brush yoke location bumps, thereby machining efficiency and machining precision have been improved, manpower resources and intensity of labour have been reduced by a wide margin, production cost is reduced, product quality has been improved. However, this utility model discloses a need twice stamping process, a brush yoke bump stamping device punching press goes out 6 spacing bumps of brush yoke, and another brush yoke bump stamping device punching press goes out 2 brush yoke location bumps, owing to need twice stamping process punching press, its punching press precision receives the influence. In addition, this utility model discloses the position of 6 spacing bumps of brush yoke and 2 brush yoke location bumps also all is fixed unchangeable, can not adjust wantonly, can not satisfy the bump position like the needs of the casing processing that the change of bump height and bump angle needs to be adjusted. Moreover, the utility model discloses a shape of processing is single, can only satisfy the processing of 6 spacing bumps of brush yoke and 2 brush yoke location bumps, can not satisfy existing bump simultaneously again jaggedly and with the needs of round hole punching press.

In order to meet the requirement of stamping of both salient points and notches and round holes, the applicant discloses an automatic stamping line for a stator shell of an automobile starter in the invention with the application number of CN201610864602.0, and overcomes the problems of high labor intensity, low processing efficiency and poor processing precision in the prior art, and is characterized in that 4 hydraulic punches are connected into a whole, each hydraulic punch is provided with 1 shell positioning device, 2 electric brush frame salient point stamping devices are connected into a whole, 2 sets of pneumatic manipulator devices are arranged in front of each hydraulic punch and each electric brush frame salient point stamping device, the 4 hydraulic punches and the 2 electric brush frame salient point stamping devices which are connected into a whole, 6 stamping processes can be continuously completed, after the first 6 processes are completed, the stamping line can synchronously stamp out U-shaped lead-out holes on the lower end faces, circular drain valve mounting holes, rectangular grooves on the upper end faces, rectangular grooves on the lower end faces, 2 electric brush frame positioning salient points and 6 electric brush frame salient points once, and the labor intensity of the processing is greatly reduced, and the processing precision is greatly improved. However, in the invention, 4 hydraulic punches, 2 brush holder convex point punching devices, 4 shell positioning devices and 12 sets of pneumatic manipulator devices are required to be installed on an automatic punching line, and front and rear material conveying belts are configured, and 6 punching processes can be continuously completed under the control of a control system, so that the equipment investment is large, even if the equipment investment is large, the equipment only can be suitable for the punching work of the 4 hydraulic punches with fixed height and fixed angle and the 2 brush holder convex point punching devices on the automatic punching line, and if the height and the angle of the convex points on the stator shell to be processed are changed and need to be adjusted, the equipment can not be quickly adapted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem, overcome prior art's weak point, a plurality of spacing bumps on the starter stator casing can only be accomplished simultaneously to one stamping process on an equipment to the provision, location bump and up end rectangle recess, lower terminal surface rectangle recess, the punching press work in hole and drain valve mounting hole and U-shaped groove is drawn forth to the wire, if the spacing bump on the stator casing of treating processing, location bump, the wire is drawn forth the height and the bump angle change of hole and drain valve mounting hole and needs to be adjusted, a many function combination punch press of processing automobile starter stator casing that can adapt to fast.

The utility model discloses a technical scheme include the workstation, install cantilever and board backing plate on the workstation install on the cantilever and compress tightly the cylinder, install the pressure head in the bottom of the piston rod that compresses tightly the cylinder at last first annular fixed plate, second annular fixed plate and third annular fixed plate are installed from inside to outside in proper order to the upper surface of board backing plate, the upper surface of first annular fixed plate, second annular fixed plate and third annular fixed plate is in the coplanar, and the clearance between first annular fixed plate and the second annular fixed plate forms interior annular groove, and the clearance between second annular fixed plate and the third annular fixed plate forms outer annular groove, has cantilever type punching press mechanism at the upper surface of first annular fixed plate, installs removable drift on cantilever type punching press mechanism the intermediate position flange joint has the fixed overcoat of casing, and the fixed overcoat of casing is connected with the fixed endotheca of casing in the fixed overcoat of casing, be equipped with the through-hole that corresponds with removable through-hole or the recess that inwards stands out correspondingly on the fixed endotheca set of casing, and the board backing plate and the processing center axis at the workstation and install ejecting mechanism of removable drift.

The cantilever type punching mechanism comprises a horizontal oil cylinder support fixing base and a horizontal oil cylinder fixing mounting plate, wherein an angle adjusting screw which can slide in an inner annular groove and an outer annular groove and then be locked is installed on the horizontal oil cylinder support fixing base, a horizontal oil cylinder which can slide up and down on the horizontal oil cylinder fixing mounting plate is installed on the horizontal oil cylinder fixing mounting plate, a die handle is fixedly connected with a piston rod end of the horizontal oil cylinder, a first connecting plate is connected with the front end of the die handle, a C-shaped fixing claw is connected with the front end face of the first connecting plate, a base plate is installed in the C-shaped fixing claw, a second connecting plate is installed on the front end face of the base plate, the outer edge of the second connecting plate is connected with the C-shaped fixing claw, a male die fixing plate is installed on the front end face of the second connecting plate, a central axis of the male die fixing plate and the second connecting plate is correspondingly processed, the central axis of the second connecting plate is larger than the central axis of the male die fixing plate to form a stepped hole, the replaceable punch is installed in the stepped hole, and the replaceable punch is compressed and fixed through a fifth connecting screw.

The replaceable punch comprises a limit convex point and a positioning convex point punching punch, an upper end face rectangular groove punching punch, a lower end face rectangular groove punching punch, a lead leading-out hole punching punch, a drain valve mounting hole punching punch and a U-shaped groove punching punch.

The ejection mechanism comprises an ejection cylinder, an ejection rod fixing seat is installed at the upper end of a piston rod of the ejection cylinder, an ejection rod is installed on the ejection rod fixing seat, a third connecting plate is fixedly connected to the upper end of the ejection cylinder, a connecting rod is fixedly connected to the third connecting plate, the connecting rod is in threaded connection with a first annular fixing plate, and a through hole which enables the ejection rod to move up and down is correspondingly machined in the first annular fixing plate and the fixed inner sleeve of the machine shell.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) By adopting the utility model, the punching work of a plurality of limit bumps, positioning bumps, upper end surface rectangular grooves, lower end surface rectangular grooves, lead leading-out holes, drain valve mounting holes and U-shaped grooves arranged on the shell of the starter stator can be simultaneously finished only by replacing a plurality of replaceable punches and adjusting the angles and the heights on a combined punch press and only one punching process, thereby further improving the processing efficiency and the processing precision; meanwhile, 4 hydraulic punches, 2 brush holder salient point punching devices, 4 shell positioning devices and 12 sets of pneumatic manipulator devices are arranged on an automatic punching line in the prior art, and functions of a material conveying belt and a control system at the front end and the rear end are configured, so that the defect that a plurality of punching devices are needed for punching existing salient points, gaps and round holes in the prior art is overcome, and equipment investment is saved.

(2) The utility model discloses can satisfy the demand that the altitude variation and the angle variation of a plurality of spacing bumps, location bump and up end rectangle recess, lower terminal surface rectangle recess, wire lead-out hole and drain valve mounting hole and U-shaped groove need the starter stator casing processing of adjusting, altitude variation and angle variation can be adjusted and angle modulation structure and altitude modulation structure are simple, and it is convenient fast to adjust, if need carry out angle modulation, only need with angle modulation screw in the position in interior annular recess and outer annular recess is adjusted the back locking and is fixed can; if the height is required to be adjusted, the up-and-down position of the horizontal oil cylinder on the horizontal oil cylinder fixing and mounting plate is adjusted.

(3) To the altitude mixture control, also can adopt the cantilever type punching press mechanism of co-altitude not, the height that lengthens or shorten horizontal cylinder fixed mounting board promptly can be adjusted, can make the structure more stable like this.

Drawings

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

fig. 2 is a schematic structural diagram of the present invention;

fig. 3 is a schematic structural view of the cantilever type punching mechanism of the present invention.

In the figure:

1. an upper pressing cylinder, 2, a cantilever, 3, a pressure head,

4. a cantilever type punching mechanism is arranged on the upper portion of the punching mechanism,

4-1, a horizontal oil cylinder bracket fixing seat, 4-2, a horizontal oil cylinder fixing mounting plate,

4-3, replaceable punch, 4-4, male die fixing plate,

4-5, a fifth connecting screw, 4-6, a fourth connecting screw,

4-7, a second connecting plate, 4-8, a second connecting screw,

4-9. A die handle, 4-10. A backing plate,

4-11, a third connecting screw, 4-12, a first connecting screw,

4-13, a first connecting plate, 4-14, a C-shaped fixed claw,

4-15, a horizontal oil cylinder,

5. an angle-adjusting screw is arranged on the upper surface of the frame,

6-1, a first annular fixing plate, 6-2, a second annular fixing plate,

6-3, a third annular fixing plate, 6-4, an outer annular groove,

6-5, an inner annular groove is formed,

7. a machine base plate 8, a workbench,

9. an ejection mechanism is arranged on the base plate,

9-1 connecting rod, 9-2 third connecting plate,

9-3 ejector rods, 9-4 ejector cylinders, 9-5 ejector rod fixing seats,

10. the casing is fixed on the outer sleeve,

11. the inner sleeve is fixed on the shell;

12-1, a first screw, 12-2, a second screw,

12-3, a third screw, 12-4, a fourth screw, 12-5 and a fifth screw.

Detailed Description

As shown in fig. 1 to 3, the present invention includes a work table 8, a cantilever 2 and a machine base plate 7 are installed on the work table 8, specifically, a screw hole is correspondingly processed between the work table 8 and the machine base plate 7, the machine base plate 7 is fixedly connected to the work table 8 through a first screw 12-1, a screw hole is correspondingly processed between the work table 8 and a base of the cantilever 2, the cantilever 2 is fixedly connected to the work table 8 through a fifth screw 12-5, an upper pressure cylinder 1 is installed on the cantilever 2, a pressure head 3 is installed at a bottom end of a piston rod of the upper pressure cylinder 1, a first annular fixing plate 6-1, a second annular fixing plate 6-2 and a third annular fixing plate 6-3 are sequentially installed on an upper surface of the machine base plate 7 from inside to outside at intervals, screw holes for connecting to the machine base plate 7 are respectively and circumferentially and uniformly distributed on the first annular fixing plate 6-1, the second annular fixing plate 6-2 and the third annular fixing plate 6-3, and are respectively fixedly connected to the machine base plate 7 through second screws 12-2; the upper surfaces of the first annular fixing plate 6-1, the second annular fixing plate 6-2 and the third annular fixing plate 6-3 are positioned on the same plane, an inner annular groove 6-5 is formed in a gap between the first annular fixing plate 6-1 and the second annular fixing plate 6-2, an outer annular groove 6-4 is formed in a gap between the second annular fixing plate 6-2 and the third annular fixing plate 6-3, and a cantilever type stamping mechanism 4 is mounted on the upper surfaces of the first annular fixing plate 6-1, the second annular fixing plate 6-2 and the third annular fixing plate 6-3; the number of the cantilever type stamping mechanisms 4 is determined according to the specific conditions of limit salient points and positioning salient points on a stator casing to be processed, rectangular grooves on the upper end surface and the lower end surface of the casing, lead leading-out holes, drain valve mounting holes and U-shaped grooves;

the cantilever type stamping mechanism 4 comprises a horizontal oil cylinder support fixing base 4-1 and a horizontal oil cylinder fixing mounting plate 4-2, an angle adjusting screw 5 which can slide in an inner annular groove 6-5 and an outer annular groove 6-4 to adjust the angle is arranged on the horizontal oil cylinder support fixing base 4-1, a horizontal oil cylinder 4-15 which can slide up and down on the horizontal oil cylinder fixing mounting plate 4-2 to adjust the height is arranged on the horizontal oil cylinder fixing mounting plate 4-2, a die handle 4-9 is fixedly connected with a piston rod end of the horizontal oil cylinder 4-15, the front end of the die handle 4-9 is connected with a first connecting plate 4-13 through a first connecting screw 4-12, the front end face of the first connecting plate 4-13 is connected with a C-shaped fixing claw 4-14 through a second connecting screw 4-8, a cushion plate 4-10 is arranged in the C-shaped fixing claw 4-14, a second connecting plate 4-7 is arranged on the front end face of the cushion plate 4-10, the cushion plate 4-10 is connected with the second connecting plate 4-7 through a third connecting screw 4-11, the outer edge of the second connecting plate 4-7 is connected with the C-shaped fixing claw 4-14 through a fourth connecting screw 4-6, a punch retainer 4-4 is arranged on the front end face of the second connecting plate 4-7, the punch retainer 4-4 is connected with the second connecting plate 4-7 through a fifth connecting screw 4-5, a central hole is correspondingly processed on the central axis of the punch retainer 4-4 and the second connecting plate 4-7, wherein the central hole of the second connecting plate 4-7 is larger than the central hole of the punch retainer 4-4 to form a stepped hole, a replaceable punch head 4-3 is arranged in the stepped hole, and the rear end of the replaceable punch head 4-3 is positioned through a shoulder thereof and is pressed and fixed through a fifth connecting screw 4-5;

the replaceable punch 4-3 comprises a plurality of limit salient points and a punching punch for positioning the salient points, an upper end surface rectangular groove punching punch, a lower end surface rectangular groove punching punch, a lead leading-out hole punching punch, a drain valve mounting hole punching punch and a U-shaped groove punching punch; the specific number of the replaceable punches 4-3 is determined according to the specific conditions of the limit salient points and the positioning salient points of the stator shell to be processed, the rectangular grooves on the upper end surface and the lower end surface of the stator shell, the lead leading-out holes, the drain valve mounting holes and the U-shaped punches;

a casing fixing outer sleeve 10 is connected to the middle position of the upper surface of the first annular fixing plate 6-1 in a flange mode, a casing fixing inner sleeve 11 is connected to the inside of the casing fixing outer sleeve 10 through screws, through holes corresponding to the replaceable punch pins 4-3 are correspondingly formed in the casing fixing outer sleeve 10, through holes corresponding to the replaceable punch pins 4-3 or grooves protruding inwards are correspondingly formed in the casing fixing inner sleeve 11, and the casing fixing outer sleeve 10 and the corresponding casing fixing inner sleeve 11 through holes are used for punching rectangular grooves in the upper end face, rectangular grooves in the lower end face, lead leading-out holes, drain valve mounting holes and U-shaped grooves of the stator casing; the through hole of the shell fixing outer sleeve 10 and the corresponding inward protruding groove of the shell fixing inner sleeve 11 are used for punching a limiting convex point and a positioning convex point of the stator shell;

a center hole is correspondingly processed on the workbench 8 and the axis center of the machine base plate 7, an ejection mechanism 9 is installed, the ejection mechanism 9 comprises an ejection cylinder 9-4, an ejection rod fixing seat 9-5 is installed at the upper end of a piston rod of the ejection cylinder 9-4, an ejection rod 9-3 is installed on the ejection rod fixing seat 9-5, a third connecting plate 9-2 is fixedly connected to the upper end of the ejection cylinder 9-4 through a fourth screw 12-4, a connecting rod 9-1 is fixedly connected to the third connecting plate 9-2 through a third screw 12-3, the upper end of the connecting rod 9-1 is in threaded connection with a first annular fixing plate 6-1, and a through hole which can enable the ejection rod 9-3 to move up and down is correspondingly processed on the first annular fixing plate 6-1 and the machine shell fixing inner sleeve 11.

When the device is used, the corresponding replaceable punch 4-3 is installed according to the punching work requirements of the limiting convex point, the positioning convex point, the rectangular groove on the upper end face, the rectangular groove on the lower end face, the lead leading-out hole, the drain valve installation hole and the U-shaped groove which are arranged on the stator shell of the starter, the stator shell 13 to be processed is placed in a gap between the shell fixing outer sleeve 10 and the shell fixing inner sleeve 11, the angle adjusting screw 5 is locked and fixed in the inner annular groove 6-5 and the outer annular groove 6-4, the upper pressing cylinder 1 is started, and the stator shell 13 to be processed is pressed and fixed between the shell fixing outer sleeve 10 and the shell fixing inner sleeve 11 through the pressing head 3 arranged at the bottom end of the piston rod of the upper pressing cylinder 1; then, a plurality of horizontal oil cylinders 4-15 are started simultaneously, so that a replaceable punch 4-3 can advance, and the punching work of a plurality of brush holder limiting convex points, brush holder positioning convex points, an upper end face rectangular groove, a lower end face rectangular groove, a lead leading-out hole, a drain valve mounting hole and a U-shaped groove which are arranged on a machine shell can be completed simultaneously on one piece of equipment by only one punching process, after the punching work of one stator machine shell is completed, a push-out air cylinder 9-4 is started, a piston rod of the push-out air cylinder 9-4 moves upwards, a push-out rod 9-3 rises in a through hole which is correspondingly processed by a first annular fixing plate 6-1 and a machine shell fixing inner sleeve 11, and a processed stator machine shell 13 is ejected, so that the processing of one stator machine shell product is completed.

If angle adjustment is needed, the positions of the angle adjusting screws 5 in the inner annular groove 6-5 and the outer annular groove 6-4 are adjusted and then locked and fixed;

if the height adjustment is needed, the horizontal oil cylinders 4-15 can be adjusted on the horizontal oil cylinder fixing and mounting plates 4-2 only by adjusting the upper and lower positions of the horizontal oil cylinders, or the horizontal oil cylinder fixing and mounting plates 4-2 with different heights can be adopted for adjustment, thereby the utility model discloses the processing efficiency and the processing precision are further improved and the processing requirements of multiple types of bumps, holes or/and grooves are met.

Claims (4)

1. A multifunctional combined punch press for machining a stator shell of an automobile starter comprises a workbench (8), a cantilever (2) and a machine table base plate (7) are mounted on the workbench (8), an upper pressing cylinder (1) is mounted on the cantilever (2), a pressure head (3) is mounted at the bottom end of a piston rod of the upper pressing cylinder (1), and the multifunctional combined punch press is characterized in that a first annular fixing plate (6-1), a second annular fixing plate (6-2) and a third annular fixing plate (6-3) are sequentially mounted on the upper surface of the machine table base plate (7) from inside to outside, the upper surfaces of the first annular fixing plate (6-1), the second annular fixing plate (6-2) and the third annular fixing plate (6-3) are located on the same plane, an inner annular groove (6-5) is formed in a gap between the first annular fixing plate (6-1) and the second annular fixing plate (6-2), an outer annular groove (6-4) is formed in a gap between the second annular fixing plate (6-2) and the third annular fixing plate (6-3), an outer annular groove (6-4) is mounted on the first annular fixing plate (6-1), and a replaceable upper punch mechanism (4) is mounted on the cantilever type annular fixing plate (3), the middle position of the upper surface of the first annular fixing plate (6-1) is connected with a machine shell fixing outer sleeve (10) in a flange mode, a machine shell fixing inner sleeve (11) is connected with the inner screw of the machine shell fixing outer sleeve (10) in a screw mode, a through hole corresponding to the replaceable punch head (4-3) is correspondingly formed in the machine shell fixing outer sleeve (10), a through hole corresponding to the replaceable punch head (4-3) or an inward protruding groove is correspondingly formed in the machine shell fixing inner sleeve (11), a center hole is correspondingly machined in the working table (8) and the axis center of the machine table base plate (7), and an ejection mechanism (9) is installed in the center hole.

2. The multifunctional combined punch press for machining the stator shell of the automobile starter according to claim 1, characterized in that the cantilever type punching mechanism (4) comprises a horizontal cylinder support fixing base (4-1) and a horizontal cylinder fixing mounting plate (4-2), an angle adjusting screw (5) which can slide in an inner annular groove (6-5) and an outer annular groove (6-4) and then be locked is installed on the horizontal cylinder support fixing base (4-1), a horizontal cylinder (4-15) which can slide up and down on the horizontal cylinder fixing mounting plate (4-2) is installed on the horizontal cylinder fixing mounting plate (4-2), a die shank (4-9) is fixedly connected to a piston rod end of the horizontal cylinder (4-15), a first connecting plate (4-13) is connected to the front end of the die shank (4-9), a C-shaped fixing claw (4-14) is connected to the front end face of the first connecting plate (4-13), a backing plate (4-10) is installed in the C-shaped fixing claw (4-14), a second connecting plate (4-7) is connected to the outer edge of the second connecting plate (4-14), and center holes are correspondingly machined on the center axes of the male die fixing plate (4-4) and the second connecting plate (4-7), wherein the center hole of the second connecting plate (4-7) is larger than the center hole of the male die fixing plate (4-4) to form a stepped hole, the replaceable punch head (4-3) is installed in the stepped hole, and the replaceable punch head is pressed and fixed through a fifth connecting screw (4-5).

3. The multifunctional combined punch press for processing the automobile starter stator casing as claimed in claim 1 or 2, wherein the replaceable punch (4-3) comprises a punch of a limit bump and a positioning bump, and a punch of an upper end face rectangular groove, a punch of a lower end face rectangular groove, a punch of a lead-out hole, a punch of a drain valve mounting hole and a punch of a U-shaped groove.

4. The multifunctional combined punch press for machining the automobile starter stator casing is characterized in that the ejection mechanism (9) comprises an ejection cylinder (9-4), an ejection rod fixing seat (9-5) is installed at the upper end of a piston rod of the ejection cylinder (9-4), an ejection rod (9-3) is installed on the ejection rod fixing seat (9-5), a third connecting plate (9-2) is fixedly connected to the upper end of the ejection cylinder (9-4), a connecting rod (9-1) is fixedly connected to the third connecting plate (9-2), the connecting rod (9-1) is in threaded connection with a first annular fixing plate (6-1), and a through hole through which the ejection rod (9-3) can move up and down is correspondingly machined in the first annular fixing plate (6-1) and the casing fixing inner sleeve (11).

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