阅读说明：本技术 一种可调节行程的压力机 (Press machine with adjustable stroke ) 是由 朱晓兰 于 2021-09-26 设计创作，主要内容包括：本发明涉及压力机技术领域,具体的说是一种可调节行程的压力机,包括加工座,所述加工座的顶部固定安装有支撑架,所述支撑架的顶部固定安装有驱动架,所述驱动架内转动安装有驱动辊,所述驱动辊的外侧分别固定套设有多个对称设置的第一驱动盘、第二驱动盘和第三驱动盘,且对称设置的两个第一驱动盘、两个第二驱动盘和两个第三驱动盘之间分别固定连接有一个连接轴,所述第一驱动盘、第二驱动盘和第三驱动盘的直径依次减小,所述连接轴的外侧转动安装有调节组件；本发明实现了针对不同加工件冲压不同厚度的加工需求,而且一个动力机构,实现几种不同的冲压行程,大大节省了加工成本,同时提高了生产效率。(The invention relates to the technical field of presses, in particular to a stroke-adjustable press, which comprises a processing seat, wherein a supporting frame is fixedly arranged at the top of the processing seat, a driving frame is fixedly arranged at the top of the supporting frame, a driving roller is rotatably arranged in the driving frame, a plurality of first driving discs, second driving discs and third driving discs which are symmetrically arranged are respectively fixedly sleeved at the outer side of the driving roller, a connecting shaft is respectively and fixedly connected between the two first driving discs, the two second driving discs and the two third driving discs which are symmetrically arranged, the diameters of the first driving discs, the second driving discs and the third driving discs are sequentially reduced, and an adjusting assembly is rotatably arranged at the outer side of the connecting shaft; the invention realizes the processing requirements of different thicknesses for different processing parts, and one power mechanism realizes several different punching strokes, thereby greatly saving the processing cost and simultaneously improving the production efficiency.)

1. A press machine with adjustable stroke comprises a processing seat (1), and is characterized in that: the top fixed mounting of processing seat (1) has support frame (3), the top fixed mounting of support frame (3) has drive frame (4), drive roller (5) is installed to drive frame (4) internal rotation, the outside of drive roller (5) is fixed respectively and is equipped with first driving-disc (6), second driving-disc (7) and third driving-disc (8) that a plurality of symmetries set up, and between two first driving-discs (6), two second driving-discs (7) and two third driving-discs (8) of symmetry setting respectively fixedly connected with a connecting axle (9), the diameter of first driving-disc (6), second driving-disc (7) and third driving-disc (8) reduces in proper order, the outside of connecting axle (9) is rotated and is installed adjusting part, and adjusting part is connected with dwang (29), the bottom of dwang (29) runs through the below that extends to drive frame (4), the bottoms of the two corresponding rotating rods (29) are rotatably provided with the same lower extrusion seat (30), the top of the processing seat (1) is fixedly provided with a plurality of transportation components, the plurality of transportation assemblies correspond to the plurality of lower extrusion seats (30) one by one, one side of the driving frame (4) is fixedly provided with a driving assembly for driving the driving roller (5) to rotate, a plurality of cams (10) are fixedly sleeved on the outer side of the driving roller (5), a plurality of upper extrusion seats (11) are arranged on the top of the driving frame (4) in a penetrating and sliding manner, the upper extrusion seats (11) are in one-to-one correspondence with the cams (10), the upper extrusion seats (11) are connected with elastic components, the top fixed mounting of drive frame (4) has mounting bracket (12), the bottom fixed mounting of mounting bracket (12) has a plurality of respectively with last extrusion seat (11) corresponding extrusion dish (13).

2. An adjustable stroke press according to claim 1, wherein: adjusting part installs adjusting box (17) in connecting axle (9) outside including rotating, adjusting box (17) run through slidable mounting and have adjusting plate (18), one side fixed mounting of adjusting plate (18) has rack (28), one side inner wall of adjusting box (17) rotates and installs adjusting gear (27), adjusting gear (27) and rack (28) mesh mutually, the outside of adjusting box (17) is provided with and is used for carrying out the braking subassembly that brakes adjusting gear (27), the bottom and corresponding dwang (29) fixed connection of adjusting plate (18).

3. An adjustable stroke press according to claim 1, wherein: the transportation assembly comprises a plurality of rotating rollers (2) which are rotatably arranged at the top of the processing seat (1), the plurality of rotating rollers (2) can be connected by means of a chain wheel and a chain, and one rotating roller (2) of the plurality of rotating rollers (2) is connected with a driving motor.

4. An adjustable stroke press according to claim 1, wherein: drive assembly includes protecting crust (31) of fixed mounting in drive frame (4) one side, big belt pulley (32) and belt lace wheel (33) are installed to protecting crust (31) internal rotation, the one end of drive roller (5) extend to in protecting crust (31) and with the centre of a circle position fixed connection of big belt pulley (32), one side fixed mounting of drive frame (4) has rotating electrical machines (35), one side centre of a circle position fixed connection of the output shaft of rotating electrical machines (35) and belt lace wheel (33), the outside cover of big belt pulley (32) and belt lace wheel (33) is equipped with same belt (34).

5. An adjustable stroke press according to claim 1, wherein: elastic component is including offering two spacing groove (14) that set up at last extrusion seat (11) bottom symmetry, slidable mounting has stopper (15) in spacing groove (14), the top fixed mounting of stopper (15) has extension spring (16), the top inner wall fixed connection of the top of extension spring (16) and spacing groove (14), the one end and the drive frame (4) fixed connection of stopper (15).

6. An adjustable stroke press according to claim 2, wherein: braking component installs ratchet (25) in regulating box (17) outside including rotating, ratchet (25) are through the centre of a circle position fixed connection of fixed axle and adjusting gear (27), the outside fixed mounting of regulating box (17) has two spacing seats (22) that the symmetry set up, returning face plate (23) are installed to spacing seat (22) internal rotation, returning face plate (23) are connected with the subassembly that resets, pawl (24) are installed in one side rotation of returning face plate (23), and two pawl (24) all cooperate the use with same ratchet (25).

7. An adjustable stroke press according to claim 6, wherein: one side of the ratchet wheel (25) is provided with a hexagonal hole (26) matched with the hexagonal wrench.

8. An adjustable stroke press according to claim 6, wherein: reset assembly includes spacing axle (36) of fixed mounting in returning face plate (23) both sides, and two spacing axles (36) rotate with spacing seat (22) respectively and are connected, the outside cover of spacing axle (36) is equipped with torsion spring (37), the outside fixed connection of the one end of torsion spring (37) and returning face plate (23), the other end and the spacing seat (22) inner wall fixed connection of torsion spring (37).

9. An adjustable stroke press according to claim 2, wherein: one side fixed mounting of regulating plate (18) has the slider, inner wall one side fixed mounting of regulating box (17) has the slide rail, and slider and slide rail sliding connection.

10. An adjustable stroke press according to claim 2, wherein: bar hole (19) are seted up to one side of regulating box (17), one side fixed connection welding axle of regulating plate (18), and the welding axle runs through bar hole (19) and fixedly connected with pointer (20), the outside fixed mounting of regulating box (17) has scale (21).

Technical Field

The invention relates to the technical field of presses, in particular to a stroke-adjustable press.

Background

The press (including a punch press and a hydraulic press) is a universal press with an exquisite structure. The press machine has the characteristics of wide application, high production efficiency and the like, and can be widely applied to processes of cutting, punching, blanking, bending, riveting, forming and the like. The metal is processed into parts by applying a strong pressure to the metal blank to cause plastic deformation and fracture of the metal. When the mechanical press works, a motor drives a large belt pulley (usually used as a flywheel) through a triangle belt, and a crank-slider mechanism is driven through a gear pair and a clutch, so that a slider and a male die move down linearly. After the forging and pressing work of the mechanical press is finished, the sliding block moves upwards, the clutch is automatically disengaged, and meanwhile, the automatic device on the crankshaft is switched on, so that the sliding block stops near a top dead center.

The existing press machine cannot realize the stamping of a large batch of workpieces in the operation process, one press machine can only stamp one product at a time, the working efficiency is low, meanwhile, the production cost of the press machine is high, and under the conditions of high cost and corresponding low efficiency, the press machine with the adjustable stroke is provided for solving the problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a stroke-adjustable press.

(II) technical scheme

In order to achieve the purpose, the technical scheme adopted by the invention aims to solve the problems that a large number of workpieces cannot be punched in the operation process of the press machine, and one press machine can only punch one product at a time.

A press machine with adjustable stroke comprises a processing seat, wherein a support frame is fixedly mounted at the top of the processing seat, a driving frame is fixedly mounted at the top of the support frame, a driving roller is rotatably mounted in the driving frame, a plurality of first driving disks, second driving disks and third driving disks which are symmetrically arranged are fixedly sleeved at the outer sides of the driving roller respectively, a connecting shaft is fixedly connected between the two first driving disks, the two second driving disks and the two third driving disks which are symmetrically arranged respectively, the diameters of the first driving disks, the second driving disks and the third driving disks are reduced in sequence, an adjusting assembly is rotatably mounted at the outer side of the connecting shaft and is connected with a rotating rod, the bottom of the rotating rod penetrates and extends to the lower part of the driving frame, the bottoms of the corresponding two rotating rods are rotatably mounted with a same lower extrusion seat, and a plurality of transportation assemblies are fixedly mounted at the top of the processing seat, and a plurality of transportation subassemblies and a plurality of extrusion seat one-to-one down, one side fixed mounting of carriage has and is used for driving the drive roller to carry out pivoted drive assembly, the fixed cover in the drive roller outside is equipped with a plurality of cams, slidable mounting is run through at the top of carriage has a plurality of extrusion seats of going up, and a plurality of extrusion seats and a plurality of cam one-to-one of going up, it is connected with elastic component to go up the extrusion seat, the top fixed mounting of carriage has the mounting bracket, the bottom fixed mounting of mounting bracket has a plurality of respectively with last extrusion dish that the extrusion seat corresponds.

Preferably, the adjusting assembly comprises an adjusting box rotatably mounted on the outer side of the connecting shaft, the adjusting box is provided with an adjusting plate in a penetrating and sliding manner, a rack is fixedly arranged on one side of the adjusting plate, an adjusting gear is rotatably arranged on the inner wall of one side of the adjusting box, the adjusting gear is meshed with the rack, a braking component for braking the adjusting gear is arranged on the outer side of the adjusting box, the bottom of the adjusting plate is fixedly connected with the corresponding rotating rod, when the height of the lower extrusion seat needs to be adjusted, the brake assembly is firstly utilized to release the brake of the adjusting gear, the adjusting gear is rotated, and as the adjusting gear is meshed with the rack, so can drive the regulating plate and carry out longitudinal movement, and regulating plate longitudinal movement can drive the dwang and carry out longitudinal movement, and the dwang can drive down and extrude seat longitudinal movement, and then can be effectual highly adjusting of extruding the seat down.

Preferably, the transportation assembly comprises a plurality of rotating rollers which are rotatably arranged at the top of the processing seat, the plurality of rotating rollers can be connected through a chain wheel and a chain in a transmission manner, one rotating roller of the plurality of rotating rollers is connected with a driving motor, the driving motor can drive the plurality of rotating rollers to rotate, a workpiece needing stamping processing is placed on the transportation assembly, and the rotating rollers can be used for transporting the workpiece to a designated stamping position.

As preferred, drive assembly includes the protecting crust of fixed mounting in driving frame one side, big belt pulley and belt lace wheel are installed to the protecting crust internal rotation, the one end of drive roller extend to in the protecting crust and with the centre of a circle position fixed connection of big belt pulley, one side fixed mounting of driving frame has the rotating electrical machines, the output shaft of rotating electrical machines and one side centre of a circle position fixed connection of belt lace wheel, the outside cover of big belt pulley and belt lace wheel is equipped with same belt, when needs drive roll rotates, starts the rotating electrical machines, and the rotating electrical machines drives the belt lace wheel and rotates, and the belt lace wheel utilizes the belt to drive big belt pulley and rotates, under the different circumstances of drive ratio of belt lace wheel and big belt pulley, can accelerate the rotating electrical machines output power rotational speed, has improved the punching press efficiency of press.

Preferably, the elastic component comprises two limiting grooves symmetrically arranged at the bottom of the upper extrusion seat, the limiting grooves are internally and slidably provided with limiting blocks, the top of each limiting block is fixedly provided with a tension spring, the top of each tension spring is fixedly connected with the inner wall of the top of each limiting groove, and one end of each limiting block is fixedly connected with the driving frame.

As preferred, the braking subassembly is including rotating the ratchet of installing in the regulating box outside, the ratchet passes through fixed axle and adjusting gear's centre of a circle position fixed connection, the outside fixed mounting of regulating box has two spacing seats that the symmetry set up, the returning face plate is installed to spacing seat internal rotation, the returning face plate is connected with the subassembly that resets, one side of returning face plate is rotated and is installed the pawl, and two pawls all cooperate with same ratchet and use, utilizes two pawls and ratchet looks block, can brake adjusting gear, wherein sets up two pawls, can brake adjusting gear's corotation and reversal, and when adjusting gear needs corotation or reversal, only need the upset correspond that pawl of braking alright.

Preferably, one side of the ratchet wheel is provided with a hexagonal hole matched with the hexagonal wrench.

As preferred, the subassembly that resets includes the spacing axle of fixed mounting in returning face plate both sides, and two spacing axles rotate with spacing seat respectively and be connected, the outside cover of spacing axle is equipped with torsion spring, torsion spring's one end and the outside fixed connection of returning face plate, torsion spring's the other end and spacing seat inner wall fixed connection can make torsion spring produce deformation when the returning face plate overturns, and when the releasing returning face plate, can make the returning face plate reset under torsion spring's elasticity.

Preferably, one side fixed mounting of regulating plate has the slider, inner wall one side fixed mounting of regulating box has the slide rail, and slider and slide rail sliding connection utilize slider and slide rail can reciprocate the regulating plate and guide.

As preferred, the bar hole is seted up to one side of regulating box, one side fixed connection welding axle of regulating plate, and the welding axle runs through bar hole and fixedly connected with pointer, the outside fixed mounting of regulating box has the scale, when regulating plate lift removal, can drive the pointer and carry out lift movement, through observing the numerical value change that the pointer instructed the scale, the height of extrusion seat under the regulation that can be accurate.

Compared with the prior art, the invention has the following beneficial effects:

1. the rotating motor can be used for driving the driving roller to rotate, the driving roller can drive a plurality of pairs of first driving discs, second driving discs and third driving discs to rotate when rotating, the diameters of the first driving discs, the second driving discs and the third driving discs are different, so that different strokes of the connected lower extrusion seats are realized, when the press body is used, the processed parts with different thicknesses are required to be extruded, the processed parts with different requirements can be transported into the appointed lower extrusion seats, the lower extrusion seats with different strokes are connected with the same driving roller together, the effect of simultaneous linkage is realized, the processed parts with different thicknesses are processed and punched simultaneously, the processing efficiency is greatly improved, and the requirements for reducing the production cost are realized due to the large-batch processing of the processed parts;

when rotating based on the drive roller, can drive the cam and rotate, can promote extrusion seat upwards to move when the cam rotates, can realize carrying out the punching press to the machined part of the fixed thickness of processing under the cooperation of last extrusion seat and extrusion dish, and owing to set up the extension spring, can so that rise the last extrusion seat after finishing and can reset to realized the effect of last extrusion seat reciprocating motion, realized incessant punching press.

2. When the extrusion seat need carry out certain fine-tuning to the punching press thickness of some special machined parts under the utilization, owing to utilize two pawls and ratchet looks block, can brake adjusting gear, wherein set up two pawls, can brake adjusting gear's corotation and reversal, and when adjusting gear needs corotation or reversal, only need the upset correspond that pawl of braking alright, utilize hexagon socket head cap screw can drive the ratchet and rotate this moment, and the ratchet can drive the regulating plate and remove, thereby can highly adjust the extrusion seat down, make this pressure gauge body can adjust down the height of extrusion seat to the processing demand of a special machined part.

3. Utilize driving motor can drive a plurality of rotatory rollers in the transportation subassembly and rotate, place the work piece that will need stamping process at the transportation subassembly, utilize rotatory roller can realize transporting appointed punching press position to the machined part.

4. When the driving roller is driven to rotate, the rotating speed of the output power of the rotating motor can be accelerated under the condition that the transmission ratios of the small belt pulley and the large belt pulley are different, and the stamping efficiency of the press machine is improved.

Drawings

FIG. 1 is a schematic view of an overall structure of an adjustable stroke press according to the present invention;

FIG. 2 is a schematic view of a portion of an adjustable stroke press according to the present invention;

FIG. 3 is a schematic cross-sectional view of FIG. 2 of an adjustable stroke press of the present invention;

FIG. 4 is a schematic view of a portion of an adjustable stroke press according to the present invention;

FIG. 5 is a schematic diagram of a partial three-dimensional structure of an adjustable stroke press according to the present invention;

FIG. 6 is a schematic side view of an adjustable stroke press of the present invention in FIG. 1;

FIG. 7 is a schematic diagram of a partial three-dimensional structure of an adjustable stroke press according to the present invention;

FIG. 8 is a schematic diagram of a partial three-dimensional structure of an adjustable stroke press according to the present invention;

FIG. 9 is a schematic view of a cam structure of an adjustable stroke press according to the present invention;

FIG. 10 is a schematic view of a partial three-dimensional structure of an adjustable stroke press according to the present invention;

fig. 11 is a schematic cross-sectional view of fig. 10 of an adjustable stroke press according to the present invention.

In the figure: 1. processing a base; 2. a rotating roller; 3. a support frame; 4. a driving frame; 5. a drive roller; 6. a first drive disk; 7. a second drive disc; 8. a third drive disc; 9. a connecting shaft; 10. a cam; 11. an upper extrusion seat; 12. a mounting frame; 13. an extrusion disc; 14. a limiting groove; 15. a limiting block; 16. a tension spring; 17. an adjusting box; 18. an adjusting plate; 19. a strip-shaped hole; 20. a pointer; 21. calibration; 22. a limiting seat; 23. a turnover plate; 24. a pawl; 25. a ratchet wheel; 26. a hexagonal hole; 27. an adjusting gear; 28. a rack; 29. rotating the rod; 30. a lower extrusion seat; 31. a protective shell; 32. a large belt pulley; 33. a small belt pulley; 34. a belt; 35. a rotating electric machine; 36. a limiting shaft; 37. a torsion spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.

Example 1

As shown in fig. 1-11, a stroke-adjustable press machine comprises a processing seat 1, a supporting frame 3 is fixedly installed at the top of the processing seat 1, a driving frame 4 is fixedly installed at the top of the supporting frame 3, a driving roller 5 is rotatably installed in the driving frame 4, a plurality of first driving discs 6, second driving discs 7 and third driving discs 8 which are symmetrically arranged are respectively and fixedly sleeved on the outer sides of the driving roller 5, two first driving discs 6, two second driving discs 7 and two third driving discs 8 which are symmetrically arranged are respectively and fixedly connected with a connecting shaft 9, the diameters of the second driving discs 7 and the third driving discs 8 of the first driving discs 6 are sequentially reduced, an adjusting component is rotatably installed on the outer side of the connecting shaft 9 and is connected with a rotating rod 29, the bottom of the rotating rod 29 extends to the lower part of the driving frame 4, the bottom of the corresponding two rotating rods 29 are rotatably installed with a same lower extrusion seat 30, processing seat 1's top fixed mounting has a plurality of transportation subassemblies, and a plurality of transportation subassemblies and a plurality of lower extrusion seat 30 one-to-one, one side fixed mounting of carriage 4 has and is used for driving drive roller 5 to carry out pivoted drive assembly, the fixed cover in the 5 outsides of drive roller is equipped with a plurality of cams 10, slidable mounting is run through at the top of carriage 4 has a plurality of extrusion seats 11 of going up, and a plurality of extrusion seats 11 and a plurality of cams 10 one-to-one of going up, it is connected with elastic component to go up extrusion seat 11, the top fixed mounting of carriage 4 has mounting bracket 12, the bottom fixed mounting of mounting bracket 12 has a plurality of respectively with the corresponding extrusion dish 13 of last extrusion seat 11.

The technical scheme can be known as follows: the driving assembly is utilized to drive a plurality of pairs of first driving discs 6, second driving discs 7 and third driving discs 8 to rotate when rotating, the diameters of the first driving discs 6, the second driving discs 7 and the third driving discs 8 are different, so that different strokes of the connected lower extrusion seats 30 are realized, when the press body is used, workpieces with different thicknesses are extruded, the driving rollers 5 can push the upper extrusion seats 11 to move upwards when rotating, the workpieces with fixed thicknesses can be stamped under the matching of the upper extrusion seats 11 and the extrusion discs 13, and the upper extrusion seats 11 after finishing rising can be reset due to the arrangement of the elastic assembly, so that the reciprocating movement effect of the upper extrusion seats 11 is realized, uninterrupted stamping is realized, the lower extrusion seats 30 with different strokes are connected with the same driving roller 5 together, and the effect of simultaneous linkage is realized, meanwhile, the machined parts with different thicknesses are machined and punched, machining efficiency is greatly improved, and the requirement for reducing production cost is met due to the fact that the machined parts can be machined in large batch.

In this embodiment, the adjusting assembly includes an adjusting box 17 rotatably mounted on the outer side of the connecting shaft 9, the adjusting box 17 is slidably mounted with an adjusting plate 18 through, a rack 28 is fixedly mounted on one side of the adjusting plate 18, an adjusting gear 27 is rotatably mounted on the inner wall of one side of the adjusting box 17, the adjusting gear 27 is engaged with the rack 28, a braking assembly for braking the adjusting gear 27 is disposed on the outer side of the adjusting box 17, the bottom of the adjusting plate 18 is fixedly connected with a corresponding rotating rod 29, when the height of the lower extrusion seat 30 needs to be adjusted, the braking of the adjusting gear 27 is released by the braking assembly, the adjusting gear 27 is rotated, since the adjusting gear 27 is engaged with the rack 28, the adjusting plate 18 is driven to longitudinally move, the adjusting plate 18 longitudinally moves to drive the rotating rod 29 to longitudinally move, and the rotating rod 29 drives the lower extrusion seat 30 to longitudinally move, and further, the height of the lower pressing base 30 can be effectively adjusted.

In this embodiment, the transportation subassembly includes that a plurality of rotations are installed at the rotatory roller 2 at 1 top of processing seat, and a plurality of rotatory rollers 2 can rely on sprocket and chain drive to connect, and a rotatory roller 2 in a plurality of rotatory rollers 2 connects driving motor, utilizes driving motor to drive a plurality of rotatory rollers 2 and rotates, places the work piece that will need stamping processing at the transportation subassembly, utilizes rotatory roller 2 can realize transporting the appointed punching press position to the machined part on.

In this embodiment, the driving assembly includes a protective shell 31 fixedly installed on one side of the driving frame 4, a large belt pulley 32 and a small belt pulley 33 are rotatably installed in the protective shell 31, one end of the driving roller 5 extends into the protective shell 31 and is fixedly connected with the circle center position of the large belt pulley 32, a rotating motor 35 is fixedly installed on one side of the driving frame 4, the output shaft of the rotating motor 35 is fixedly connected with the circle center position of one side of the small belt pulley 33, the same belt 34 is sleeved on the outer sides of the large belt pulley 32 and the small belt pulley 33, when the driving roller 5 needs to be driven to rotate, the rotating motor 35 is started, the rotating motor 35 drives the small belt pulley 33 to rotate, the small belt pulley 33 can drive the large belt pulley 32 to rotate by using the belt 34, under the condition that the transmission ratio of the small belt pulley 33 is different from that of the large belt pulley 32, the output power rotating speed of the rotating motor 35 can be increased, and the stamping efficiency of the press machine is improved.

In this embodiment, elastic component is including seting up two spacing grooves 14 that set up in last extrusion seat 11 bottom symmetry, and slidable mounting has stopper 15 in the spacing groove 14, and stopper 15's top fixed mounting has extension spring 16, and extension spring 16's top and spacing groove 14's top inner wall fixed connection, stopper 15's one end and drive frame 4 fixed connection. And the upper extrusion seat 11 can stretch the tension spring 16 when moving upwards, so as to generate reverse tension to the upper extrusion seat 11, and when the cam 10 does not push the upper extrusion seat 11, the upper extrusion seat 11 can be reset under the reset elasticity of the tension spring 16, so as to realize the reset effect after the upper extrusion seat 11 moves.

In this embodiment, the braking component includes the ratchet 25 of rotation installation in the regulating box 17 outside, the ratchet 25 passes through fixed axle and adjusting gear 27's centre of a circle position fixed connection, the outside fixed mounting of regulating box 17 has two spacing seats 22 that the symmetry set up, limiting seat 22 internal rotation installs returning face plate 23, returning face plate 23 is connected with the subassembly that resets, one side of returning face plate 23 is rotated and is installed pawl 24, and two pawls 24 all cooperate the use with same ratchet 25, utilize two pawls 24 and ratchet 25 looks block, can brake adjusting gear 27, wherein set up two pawls 24, can brake adjusting gear 27's corotation and reversal, and when adjusting gear 27 needs corotation or reversal, only need the upset correspond that braked pawl 24 alright.

In this embodiment, a hexagonal hole 26 matched with the hexagonal wrench and the hexagonal wrench is formed at one side of the ratchet 25, and the ratchet 25 can be rotated by using the matched hexagonal wrench through the hexagonal hole 26.

In this embodiment, the subassembly that resets includes the spacing axle 36 of fixed mounting in returning face plate 23 both sides, and two spacing axles 36 rotate with spacing seat 22 respectively and are connected, the outside cover of spacing axle 36 is equipped with torsion spring 37, torsion spring 37's one end and returning face plate 23's outside fixed connection, torsion spring 37's the other end and spacing seat 22 inner wall fixed connection, when returning face plate 23, can make torsion spring 37 produce deformation, and when releasing returning face plate 23, can make returning face plate 23 reset under torsion spring 37's elasticity.

In this embodiment, one side fixed mounting of regulating plate 18 has the slider, and inner wall one side fixed mounting of regulating box 17 has the slide rail, and slider and slide rail sliding connection utilize slider and slide rail can reciprocate regulating plate 18 and lead.

In this embodiment, strip hole 19 is seted up to one side of regulating box 17, one side fixed connection welding axis of regulating plate 18, and the welding axis runs through strip hole 19 and fixedly connected with pointer 20, and the outside fixed mounting of regulating box 17 has scale 21, when regulating plate 18 lifting movement, can drive pointer 20 and carry out lifting movement, through observing the numerical value change that pointer 20 instructs scale 21, the height of extrusion seat 30 under the regulation that can be accurate.

The working principle of the stroke-adjustable press machine is as follows:

when the punching machine is used, a workpiece to be machined is placed on the conveying assembly, the plurality of rotary rollers 2 can be driven to rotate by the driving motor, the machined part can be conveyed to a designated punching position by the aid of the rotary rollers 2, when the workpiece is conveyed to the designated position, the rotary motor 35 is started, the rotary motor 35 drives the small belt pulley 33 to rotate, the small belt pulley 33 can drive the large belt pulley 32 to rotate by the aid of the belt 34, under the condition that the transmission ratios of the small belt pulley 33 and the large belt pulley 32 are different, the output power rotating speed of the rotary motor 35 can be increased, the punching efficiency of the punching machine is improved, the driving roller 5 can be driven to rotate by the rotary motor 35, the first driving disc 6, the second driving disc 7 and the third driving disc 8 can be driven to rotate simultaneously by the driving roller 5, and the diameters of the first driving disc 6, the second driving disc 7 and the third driving disc 8 are different, therefore, the connected lower extrusion seat 30 can have different movement strokes, and further can adapt to the stamping requirements of different workpieces, the height of the lower extrusion seat 30 can be adjusted according to the workpieces with special stamping requirements, when the height of the lower extrusion seat 30 is adjusted, the ratchet wheel 25 needs to be rotated by using a hexagonal wrench, when the ratchet wheel 25 needs to rotate forwards or backwards, only the pawl 24 corresponding to braking needs to be turned over, when the corresponding pawl 24 is disengaged from the ratchet wheel 25, the ratchet wheel 25 is rotated at the moment, the ratchet wheel 25 can drive the adjusting gear 27 to rotate, the adjusting gear 27 is engaged with the rack 28, so that the adjusting plate 18 can be driven to move longitudinally, the height of the lower extrusion seat 30 is adjusted, meanwhile, when the driving roller 5 rotates, the cam 10 can be driven to rotate, when the cam 10 rotates, the upper extrusion seat 11 can be pushed to move upwards, the upper extrusion seat 11 and the extrusion disc 13 are matched to realize the punching of the machined parts with fixed thickness, and the tension spring 16 is arranged, so that the upper extrusion seat 11 after the lifting is finished can be reset, the reciprocating movement effect of the upper extrusion seat 11 is realized, and the uninterrupted punching is realized.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.