Toggle type transmission punching machine

Abstract

The invention relates to the technical field of punching machines, and discloses a toggle type transmission punching machine which comprises a machine rack, a driving box is fixedly installed at the top of the machine rack, a connecting rod is rotationally connected to one side of the interior of the machine rack, the two ends of the connecting rod abut against the side wall of the machine rack, cams are fixedly connected to the two ends of the connecting rod, and one end of each cam is in swing connection with a punching hammer. A bottom die is fixedly installed at the bottom of the machine rack, a rocker arm is rotationally connected to the middle of the connecting rod, an inner ring is rotationally connected to one end of the rocker arm, a driving handle is rotationally connected to the middle in the machine rack, and a first gear is connected to one end of the driving handle. The rocker arm is rapidly pushed towards the direction of the connecting rod, so that one end of the cam rapidly pulls the punch hammer to ascend, the punch hammer is in a slow speed when falling down and in a rapid speed when ascending, the quality control quality of products is effectively improved, and burrs are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of punching machines, in particular to a toggle-type transmission punching machine. Background Art

[0002] A punch press is a stamping press. In national production, the stamping process has the advantages of saving materials and energy, high efficiency, low technical requirements for operators, and the ability to produce products that cannot be achieved by mechanical processing through various mold applications. Therefore, its use is becoming more and more extensive.

[0003] As we all know, the power of the punch press comes from the main motor. The main motor drives the flywheel to rotate through a V-belt connection. The flywheel drives the large gear to rotate. A punch is hung on the large gear. The punch is provided with an upper die. The upper die presses down in the slideway to complete the punching action. Since there is only one main motor to control the entire pressing and return process, the pressing speed and the return speed are the same. When the sheet metal thickness of the stamped part is large, if the speed of the main motor is too fast, the burrs and steps of the parts will increase for the punching of precision parts, and the finish will not meet the requirements. If the speed output by the main motor is too slow, the precision parts can be precisely stamped, but the return speed will be very slow. In the same time, the number of parts that can be processed is greatly reduced. Therefore, in the design of the punch press, the traditional punch press connecting rod structure and drive structure have low production efficiency and low product quality control yield. To this end, we propose a toggle transmission punch press. Summary of the invention

[0004] The object of the present invention is to provide a toggle-type transmission punch press to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a toggle-type transmission punch press comprises a machine frame, a driving box is fixedly installed on the top of the machine frame, a connecting rod is rotatably connected to one side of the inside of the machine frame, two ends of the connecting rod are abutted against the side walls of the machine frame, and both ends are fixedly connected to cams, one end of each cam is swingably connected to a hammer, a bottom mold is fixedly installed on the bottom of the machine frame, a rocker arm is rotatably connected to the middle of the connecting rod, one end of the rocker arm is rotatably connected to an inner ring, a driving handle is rotatably connected to the middle of the machine frame, one end of the driving handle is connected to a first gear, and the other end of the driving handle is connected to a second gear, the rocker arm is located between the first gear and the second gear, a driving shaft sleeve passes through the first gear and the second gear, the inner ring of the driving shaft sleeve is fixedly connected to the driving shaft, and the driving shaft and the first gear and the second gear are fixedly connected together.

[0006] Preferably, a gear is rotatably connected to one side of the bottom of the machine frame, and a gear sleeve is rotatably connected to the other side of the bottom of the machine frame. The gear sleeve and the gear are connected together by a shaft, and the end of the gear shaft is fixedly connected to a pair of third gears, one of the third gears is meshed with the first gear for transmission, and the other third gear is meshed with the second gear for transmission.

[0007] Preferably, the outer ring of the drive shaft is detachably connected to a connecting handle, a heat exchange zone is formed between two adjacent connecting handles, the connecting handle is Y-shaped, and each end of the connecting handle is detachably connected to a triangular seat, and the outer ring of the triangular seat is in conflict with the inner ring of the inner ring.

[0008] Preferably, one end of the rocker arm is annular, and the interior of the rocker arm end is hollow, a plurality of oil inlet holes are provided on the side of the rocker arm, and an oil tank is fixedly installed inside the machine frame near the rocker arm end.

[0009] Preferably, the outer ring of the drive shaft sleeve is sleeved with a braking device for reducing the continuous impact of the hammer on the workpiece during the emergency stop of the auxiliary equipment. A plurality of connecting sleeves are fixedly connected to the first gear and the second gear. A brake rod is slidably connected to each connecting sleeve. A cover plate is fixedly connected to one end of the connecting sleeve. The outer ring of the brake rod is sleeved with a first spring. The cover plate and the first spring are fixedly connected together. A wedge area is provided on each brake rod.

[0010] Preferably, the braking device includes a plurality of magnetic pole fixing plates fixedly arranged on the outer ring of the drive shaft sleeve, a large base plate is fixedly connected to the common outer side of the plurality of magnetic pole fixing plates, a docking rod is fixedly connected to the outer ring of the braking device, and a sliding block is slidably connected to one end of each docking rod.

[0011] Preferably, each magnetic pole fixing plate is fixedly connected to a second spring on one side, an electromagnet is fixedly connected to one end of the second spring, the docking rod and the inner part of the large base plate are connected to form a track, each sliding block is fixedly connected to a connecting rod on one side, a lifting plate is fixedly connected to the bottom of the connecting rod, and when the electromagnet is powered off, the electromagnet and the lifting plate are in a state of resistance to each other through the second spring.

[0012] Preferably, friction discs are fixedly installed on both sides of the machine frame, and the sliding block is wedge-shaped. When the electromagnet is energized, it abuts against the electromagnet and the lifting plate. During the rising process of the lifting plate, the sliding block cuts into the wedge area to push the brake rod and then abuts against the friction disc.

[0013] Preferably, shock-absorbing bases are fixedly installed at the bottom corners of the machine frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When the connecting rod of the present invention rotates, the cam swings, so that the hammer is lifted and lowered. In this process, when the rocker arm makes the connecting rod swing back and forth, the hammer is in a slow speed when it descends and in a fast process when it rises. As shown in the attached figure, when one end of the rocker arm is located on the right side of the second gear and the first gear, one end of the cam is located at the bottom, so that the hammer is at the lowest point. When the second gear and the first gear rotate clockwise, the rocker arm is quickly pushed toward the connecting rod, so that the cam quickly pulls the hammer with one end to rise, so that the hammer is in a slow speed when it falls and in a fast process when it rises, thereby effectively improving the product quality control and reducing the generation of burrs. 2. The cooling oil of the present invention enters the rocker arm through the oil inlet hole to lubricate and dissipate heat to the inner ring. In addition, the cooling oil can enter between the triangular seat and the inner ring for transition, so that each driving component can be effectively lubricated and dissipated, thereby increasing the service life of the equipment and reducing the possibility of equipment processing precision imbalance; 3. When the device is powered off, the present invention cuts off the power to the electromagnet, causing the electromagnet to lose its magnetism. The repulsive force generated by the second spring pushes the electromagnet to contact the lifting plate, so that the lifting plate drives the connecting rod to rise during the rising process, and the connecting rod drives the sliding block to contact the wedge area on the brake rod, and during the contact process, the brake rod is pushed to contact the friction plate, thereby preventing the rocker arm from generating inertia when the device is powered off, causing the hammer to continue punching the workpiece, thereby ensuring the quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention from another perspective; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 4 It is a schematic diagram of the internal structure of the machine frame of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at B in the middle; Figure 6 It is a schematic diagram of the rocker arm structure of the present invention; Figure 7 It is a schematic diagram of the structure of the first gear and the second gear used for locking of the present invention; Figure 8 It is a schematic diagram of the structure of the braking device of the present invention; Fig. 9 It is a schematic diagram of the planar structure of the braking device of the present invention.

[0016] In the figure: 1-machine stand; 2-driving box; 3-gear sleeve; 4-driving handle; 5-shock-absorbing base; 6-bottom mold; 7-tooth wheel; 8-first gear; 9-second gear; 10-third gear; 11-friction plate; 12-brake rod; 1201-wedge area; 13-connecting sleeve; 14-brake device; 1401-large plate; 15-rocker arm; 1501-oil inlet hole; 16-driving shaft; 17-inner ring; 18-triangular seat; 19-connecting handle; 20-heat exchange area; 21-connecting rod; 22-cam; 23-hammer; 24-oil groove; 25-cover plate; 26-first spring; 27-driving shaft sleeve; 28-pole fixing plate; 29-docking rod; 30-sliding block; 31-second spring; 32-electromagnet; 33-lifting plate; 34-connecting rod. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-9 The present invention provides a technical solution: a toggle-type transmission punching machine comprises a machine frame 1, a driving box 2 is fixedly installed on the top of the machine frame 1, a connecting rod 21 is rotatably connected to one side of the machine frame 1, both ends of the connecting rod 21 are against the side wall of the machine frame 1, and both ends are fixedly connected to cams 22, one end of each cam 22 is swingably connected to a hammer 23, a bottom mold 6 is fixedly installed at the bottom of the machine frame 1, a rocker arm 15 is rotatably connected to the middle of the connecting rod 21, one end of the rocker arm 15 is rotatably connected to an inner ring 17, a driving handle 4 is rotatably connected to the middle of the machine frame 1, one end of the driving handle 4 is connected to a first gear 8, and the other end of the driving handle 4 is connected to a second gear Wheel 9, the rocker arm 15 is located between the first gear 8 and the second gear 9, a driving shaft sleeve 27 runs through the first gear 8 and the second gear 9, the inner ring of the driving shaft sleeve 27 is fixedly connected with the driving shaft 16, the driving shaft 16 and the first gear 8 and the second gear 9 are fixedly connected together; a gear 7 is rotatably connected to one side of the bottom of the machine frame 1, and a gear sleeve 3 is rotatably connected to the other side of the bottom of the machine frame 1, the gear sleeve 3 and the gear 7 are connected together through an axis, and the end of the gear 7 shaft is fixedly connected to a pair of third gears 10, one of the third gears 10 is meshed with the first gear 8 for transmission, and the other third gear 10 is meshed with the second gear 9 for transmission.

[0019] First, install a stepper motor inside the machine frame 1, and then connect the stepper motor to a belt, one end of the belt is connected to the gear 7, when the stepper motor is turned on, the gear 7 rotates, when the gear 7 rotates, it drives the gear sleeve 3 to rotate, and the gear sleeve 3 then drives the third gear 10 to rotate, when the third gear 10 rotates, the two third gears 10 are respectively meshed with the first gear 8 and the second gear 9, so that the first gear 8 and the second gear 9 rotate, so that the first gear 8 and the second gear 9 drive the driving handle 4 to rotate during the rotation process, when the driving handle 4 rotates, the driving shaft 16 inside it rotates, when the driving shaft 16 rotates, the connecting handle 19 key-connected to the driving shaft 16 also rotates, there is no connecting handle 19, one end of which is detachably connected with a triangular seat 18, when the connecting handle 19 is produced When the first gear 8 and the second gear 9 rotate, since the multiple connecting handles 19 are connected to each other, the driving shaft 16 is eccentrically arranged on the first gear 8 and the second gear 9, so that when the first gear 8 and the second gear 9 rotate, the triangular seat 18 moves following the rotation direction of the driving shaft 16, which makes the inner ring 17 move against the rocker arm 15, wherein during the movement of the rocker arm 15, one end is in a swinging process, and the other end is connected to the inner ring, and the rocker arm 15 pushes the connecting rod 21 to rotate along the tangential direction of the connecting rod 21, so that the connecting rod 21 generates axial rotation inside the machine frame 1, and when the connecting rod 21 rotates, the cam 22 swings, so that the hammer 23 is lifted and lowered, and in this process, when the rocker arm 15 makes the connecting rod 21 swing back and forth, the hammer 23 is in a slow speed when it descends, and in a fast process when it rises, as shown in the attached figure. Figure 4 As shown, when one end of the rocker arm 15 is located on the right side of the second gear 9 and the first gear 8, one end of the cam 22 is located at the bottom, so that the hammer 23 is at the lowest point. When the second gear 9 and the first gear 8 rotate clockwise, the rocker arm 15 is quickly pushed toward the connecting rod 21, so that the cam 22 quickly pulls the hammer 23 upward with one end, so that the hammer 23 is in a slow speed when falling and in a fast speed when rising, thereby effectively improving the quality control of the product and reducing the generation of burrs.

[0020] Furthermore, the outer ring of the driving shaft 16 is detachably connected with a connecting handle 19, and a heat exchange area 20 is formed between two adjacent connecting handles 19. The connecting handle 19 is Y-shaped, and each end of the connecting handle 19 is detachably connected with a triangular seat 18, and the outer ring of the triangular seat 18 and the inner ring of the inner ring 17 are in contact; one end of the rocker arm 15 is annular, and the inside of the end of the rocker arm 15 is hollow, and a plurality of oil inlet holes 1501 are opened on the side of the rocker arm 15, and an oil tank 24 is fixedly installed near the end of the rocker arm 15 inside the machine frame 1; When the second gear 9 and the first gear 8 are in the process of continuous rotation, pressure will be generated on the inner ring 17, and high heat will be generated under high-intensity production, resulting in loss of the shaft, thus affecting the processing accuracy. Therefore, it is necessary to add a sufficient amount of cooling oil to the V-shaped oil groove 24 when the machine frame 1 is installed. This cooling oil can lubricate each gear and enter the rocker arm 15 through the oil inlet hole 1501 during the rotation of the second gear 9 and the first gear 8 to lubricate and dissipate heat to the inner ring 17. In addition, it can enter between the triangular seat 18 and the inner ring 17 for transition, so that each driving component can be effectively lubricated and dissipated, thereby improving the service life of the equipment and reducing the possibility of equipment processing accuracy imbalance.

[0021] Furthermore, the outer ring of the drive shaft sleeve 27 is sleeved with a braking device 14 for reducing the continuous impact of the hammer 23 on the workpiece during the emergency stop of the auxiliary equipment. A plurality of connecting sleeves 13 are fixedly connected to the first gear 8 and the second gear 9, and a brake rod 12 is slidably connected to each connecting sleeve 13. A cover plate 25 is fixedly connected to one end of the connecting sleeve 13. A first spring 26 is sleeved on the outer ring of the brake rod 12. The cover plate 25 and the first spring 26 are fixedly connected together, and a wedge area 1201 is opened on each brake rod 12; the braking device 14 includes a plurality of magnetic pole fixing plates 28 fixedly arranged on the outer ring of the drive shaft sleeve 27, and a large base plate 1401 is fixedly connected to the common outer side of the plurality of magnetic pole fixing plates 28; a docking rod 29 is fixedly connected to the outer ring of the braking device 14, and each docking rod One end of the 29 is slidably connected with a sliding block 30; one side of each magnetic pole fixing plate 28 is fixedly connected with a second spring 31, one end of the second spring 31 is fixedly connected with an electromagnet 32, the docking rod 29 and the large base plate 1401 are internally connected to form a track, one side of each sliding block 30 is fixedly connected with a connecting rod 34, and the bottom of the connecting rod 34 is fixedly connected with a lifting plate 33. When the electromagnet 32 ​​is powered off, the electromagnet 32 ​​and the lifting plate 33 are in a state of abutment with each other through the second spring 31; both sides of the machine frame 1 are fixedly installed with a friction disk 11, and the sliding block 30 is in a wedge shape. When the electromagnet 32 ​​is powered on, it abuts against the electromagnet 32 ​​and the lifting plate 33. During the rising process of the lifting plate 33, the sliding block 30 cuts into the wedge area 1201 to push the brake rod 12 and abuts against the friction disk 11; When the sliding block 30 is installed, it is aligned with the brake rod 12. When the device is turned on, the electromagnet 32 ​​is energized, and the drive shaft 16 drives the drive shaft 16 sleeve to rotate during the rotation. When the drive shaft 16 sleeve rotates, the pole fixing plate 28 is fixedly connected to the drive shaft 16 sleeve, so that the large base plate 1401 also rotates, so that the electromagnet 32 ​​and the pole fixing plate 28 are attracted together, the lifting plate 33 and the electromagnet 32 ​​are separated, and the connecting rod 34 descends inside the docking rod 29, so that the sliding block 30 and the end of the docking rod 29 are in contact, so that when the sliding block 30 follows the rotation of the large base plate 1401, it is away from the wedge area 1201, so that the second gear 9 and the first gear 8 can normally drive the rocker 15, wherein the docking rod 29 also contains a spring (not shown) for controlling the connecting rod 34, which can be added by yourself when the device is installed, and when the device is in normal shutdown or emergency stop, due to the second gear 9 and The eccentric connection of the first gear 8 to the rocker arm 15 will cause the rocker arm 15 to generate inertia, thereby causing the rocker arm 15 to generate forward inertia on the second gear 9 and the first gear 8. When the equipment fails and needs to be stopped or shut down, the hammer 23 is not completely in contact with the workpiece. Due to the inertia generated, it contacts the workpiece, thereby stamping a batch of workpiece blanks and reducing the quality of the workpiece. Therefore, when the equipment is powered off, the electromagnet 32 ​​is powered off to make the electromagnet 32 ​​lose its magnetism. The repulsive force generated by the second spring 31 pushes the electromagnet 32 ​​to contact the lifting plate 33, so that the lifting plate 33 drives the connecting rod 34 to rise during the rising process, so that the connecting rod 34 drives the sliding block 30 to contact the wedge area 1201 on the brake rod 12, and pushes the brake rod 12 to contact the friction disk 11 during the contact process, preventing the rocker arm 15 from generating inertia when the equipment is powered off, causing the hammer 23 to continue stamping the workpiece, thereby ensuring the quality of the workpiece.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A toggle-type transmission punch press, comprising a machine frame (1), a drive box (2) being fixedly mounted on the top of the machine frame (1), characterized in that: A connecting rod (21) is rotatably connected to one side of the machine frame (1), and both ends of the connecting rod (21) abut against the side wall of the machine frame (1), and both ends are fixedly connected to cams (22), and one end of each cam (22) is swingably connected to a hammer (23). A bottom mold (6) is fixedly installed at the bottom of the machine frame (1), and a rocker arm (15) is rotatably connected to the middle of the connecting rod (21), and one end of the rocker arm (15) is rotatably connected to an inner ring (17). The middle of the machine frame (1) is rotatably connected to A driving handle (4) is provided, one end of the driving handle (4) is connected to a first gear (8), the other end of the driving handle (4) is connected to a second gear (9), the rocker arm (15) is located between the first gear (8) and the second gear (9), a driving shaft sleeve (27) passes through the first gear (8) and the second gear (9), the inner ring of the driving shaft sleeve (27) is fixedly connected to a driving shaft (16), and the driving shaft (16) and the first gear (8) and the second gear (9) are fixedly connected together.

2. A toggle-type transmission punch press according to claim 1, characterized in that: A gear wheel (7) is rotatably connected to one side of the bottom of the machine frame (1), and a gear sleeve (3) is rotatably connected to the other side of the bottom of the machine frame (1). The gear sleeve (3) and the gear wheel (7) are connected together via a shaft. The ends of the shafts of the gear wheels (7) are fixedly connected to a pair of third gears (10), one of the third gears (10) is meshed with the first gear (8) for transmission, and the other of the third gears (10) is meshed with the second gear (9) for transmission.

3. A toggle-type transmission punch press according to claim 1, characterized in that: The outer ring of the driving shaft (16) is detachably connected to a connecting handle (19), and a heat exchange area (20) is formed between two adjacent connecting handles (19). The connecting handle (19) is in a Y-shape, and each end of the connecting handle (19) is detachably connected to a triangular seat (18), and the outer ring of the triangular seat (18) abuts against the inner ring of the inner ring (17).

4. A toggle-type transmission punch press according to claim 1, characterized in that: One end of the rocker arm (15) is ring-shaped, and the interior of the end of the rocker arm (15) is hollow. A plurality of oil inlet holes (1501) are provided on the side of the rocker arm (15), and an oil tank (24) is fixedly installed inside the machine frame (1) near the end of the rocker arm (15).

5. The toggle-type transmission punch press according to claim 1, characterized in that: The outer ring of the drive shaft sleeve (27) is sleeved with a brake device (14) for reducing the continuous impact of the hammer (23) on the workpiece during the emergency stop of the auxiliary equipment. The first gear (8) and the second gear (9) are fixedly connected with a plurality of connecting sleeves (13), each of the connecting sleeves (13) is slidably connected with a brake rod (12), one end of the connecting sleeve (13) is fixedly connected with a cover plate (25), the outer ring of the brake rod (12) is sleeved with a first spring (26), the cover plate (25) and the first spring (26) are fixedly connected together, and each of the brake rods (12) is provided with a wedge area (1201).

6. A toggle-type transmission punch press according to claim 5, characterized in that: The braking device (14) comprises a plurality of magnetic pole fixing plates (28) fixedly arranged on the outer ring of a drive shaft sleeve (27); a large base plate (1401) is fixedly connected to the common outer side of the plurality of magnetic pole fixing plates (28); a docking rod (29) is fixedly connected to the outer ring of the braking device (14); and a sliding block (30) is slidably connected to one end of each docking rod (29).

7. A toggle-type transmission punch press according to claim 6, characterized in that: One side of each of the magnetic pole fixing plates (28) is fixedly connected to a second spring (31), one end of the second spring (31) is fixedly connected to an electromagnet (32), the docking rod (29) and the large base plate (1401) are internally connected to form a track, one side of each of the sliding blocks (30) is fixedly connected to a connecting rod (34), the bottom of the connecting rod (34) is fixedly connected to a lifting plate (33), and when the electromagnet (32) is powered off, the electromagnet (32) and the lifting plate (33) are in a state of being in contact with each other through the second spring (31).

8. A toggle-type transmission punch press according to claim 7, characterized in that: Friction discs (11) are fixedly mounted on both sides of the machine frame (1); the sliding block (30) is in a wedge shape and abuts against the electromagnet (32) and the lifting plate (33) when the electromagnet (32) is energized; during the ascending process of the lifting plate (33), the sliding block (30) cuts into the wedge area (1201) to push the brake rod (12) and then abuts against the friction disc (11).

9. A toggle-type transmission punch press according to claim 5, characterized in that: Shock-absorbing bases (5) are fixedly installed at the bottom corners of the machine frame (1).

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