Connecting rod driven variable-speed punching machine with gear shaft sleeve

Abstract

The invention relates to the technical field of punching machines, and discloses a connecting rod driven variable speed punching machine with a gear shaft sleeve, which comprises a rack, a crankshaft rotationally connected with the inner wall of the rack, and a punch connected with the crankshaft, a transmission unit is further mounted in the rack, a tooth-shaped shaft body is mounted on the transmission unit, and a shaft sleeve group is fixedly mounted in the rack. A gear body is installed between the shaft sleeve sets, a hinge part is arranged in the gear body, one end of the hinge part is rotationally connected with the inner wall of the gear body, a connecting rod frame is fixedly installed at the end, located in the gear body, of the crankshaft, and one end of the connecting rod frame is fixedly connected with the hinge part. The hinge part rotationally connected with the inner wall of the gear body rotates along with the gear body, and the hinge part applies acting force to one end of the connecting rod frame in the rotating process, so that the connecting rod frame drives the crankshaft to rotate under the acting force, and then the crankshaft drives the punch to move at a low pressing speed and a high returning speed.

Description

Technical Field

[0001] The invention relates to the technical field of punching machines, in particular to a connecting rod driven variable speed punching machine with a gear sleeve. Background Art

[0002] Punching machines are mainly used to form metal plates or punch holes in metal plates. They are widely used in electronics, communications, computers, household appliances, furniture, transportation tools (such as cars, motorcycles, bicycles) and other fields. The design principle of a punching machine is to convert circular motion into linear motion. The main motor drives the flywheel, which drives the gears, crankshafts (or eccentric gears), connecting rods, etc. through the clutch to achieve the linear punching motion of the punch. The punching machine applies pressure to the material to make it plastically deform and obtain the required shape and precision. Therefore, a set of dies (upper die and lower die) must be used to place the material between them. The machine applies pressure to make it deform. The reaction force caused by the force applied to the material during processing is absorbed by the punching machine body. Punching presses can be mainly divided into mechanical punching presses and hydraulic punching presses, and punching presses have the advantages of high rigidity, high precision, easy operation and accurate positioning. In actual use, materials are transported to the punch placement area by automatic or manual feeding, and the punch is used to punch the material through the above-mentioned power mechanism. In actual use, since the downward and return movements of the punch are controlled by the same power mechanism, the downward and return speeds of the punch are the same. However, in the actual stamping process, the punch needs enough time to apply pressure and deform the material. If the descending speed is too fast, it may cause uneven force on the material and produce defective products. If the downward speed is slowed down by adjusting the power mechanism, the corresponding return speed of the punch will also be slowed down, which will affect the efficiency of the stamping work. For this reason, we propose a connecting rod driven variable speed punch with a gear sleeve. Summary of the invention

[0003] The object of the present invention is to provide a connecting rod driven variable speed punch press with a gear sleeve to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a connecting rod driven variable speed punch press with a gear sleeve, comprising a frame, a crankshaft rotatably connected to the inner wall of the frame, and a punch connected to the crankshaft, wherein a transmission unit connected to a power source is also installed inside the frame, a toothed shaft body is installed on the transmission unit, a shaft sleeve group is fixedly installed inside the frame, and a gear body is rotatably installed between the shaft sleeve groups, the gear body is meshed with the toothed shaft body, the end of the crankshaft is rotatably connected to the shaft sleeve group, and one end of the crankshaft is located inside the gear body, a hinge is provided in the gear body, one end of the hinge is rotatably connected to the inner wall of the gear body, wherein a connecting rod frame is fixedly installed on one end of the crankshaft located inside the gear body, and one end of the connecting rod frame is fixedly connected to the hinge, and the rotation of the gear body causes the hinge to apply a force to the end of the connecting rod frame, and the crankshaft rotates in the frame through the connecting rod frame, so that the return speed of the crankshaft is greater than the downward pressing speed.

[0005] Preferably, the articulated part includes an articulated frame rotatably connected to the inner wall of the gear body and an articulated rod frame fixedly connected to the end of the connecting rod frame, the articulated rod frame is slidably connected to the articulated frame, a cavity is provided on the outer wall of the articulated frame, and a sliding plate frame for sealing the cavity is installed on the outer wall of the articulated frame, and the sliding plate frame is slidably connected to the inner wall of the cavity.

[0006] Preferably, a plurality of rotating sleeves rotatably connected to the inner wall thereof are installed inside the cavity, and a meshing gear is fixedly installed at one end of the rotating sleeve, wherein a meshing gear row is fixedly installed on the side wall of the slide frame, and the meshing gear is located on the movement trajectory of the meshing gear row, and a plurality of convex chambers are opened on the articulated rod frame, and the convex chambers correspond one-to-one to the rotating sleeves, and an extension shaft body is arranged inside the rotating sleeve, and one end of the extension shaft body passes through the inner wall of the articulated frame and extends to the inside of the convex chamber, and the extension shaft body is slidably connected to the inner wall of the articulated frame.

[0007] Preferably, a connecting disc frame is fixedly installed on the end of the extension shaft body, and a plurality of telescopic parts are symmetrically installed on the connecting disc frame, and a plurality of slots adapted to the ends of the telescopic parts are symmetrically opened on the inner wall of the convex chamber, wherein a connecting panel is fixedly installed on one end of the extension shaft body located inside the rotating sleeve, and a rolling ball is installed on the outer wall of the connecting panel, and a spiral groove body 1 is provided on the inner wall of the rotating sleeve, the rolling ball is located inside the spiral groove body 1 and can slide along the track of its inner wall, and a buffer spring is fixedly installed on the inner wall of the bottom of the rotating sleeve, and the buffer spring is in contact with the connecting panel.

[0008] Preferably, a magnetic plate frame is also fixedly installed on the sliding plate frame, and the magnetic plate frame is located on one side of the meshing tooth row, wherein a connecting bracket is symmetrically fixedly installed on the inner wall of the cavity, a supporting sleeve is fixedly installed on the connecting bracket, and two spiral grooves are provided on the inner wall of the supporting sleeve, and an installation panel is fixedly installed on the rotating sleeve, and threaded holes are provided on the installation panel and the inner wall of the cavity.

[0009] Preferably, a magnetic shaft is provided inside the supporting sleeve, and the magnetic shaft has the same magnetic pole as the magnetic plate frame, and a sliding shaft located inside the spiral groove body 2 is fixedly installed on the top of the magnetic shaft, and the sliding shaft can slide within the spiral groove body 2 within a limited position, and one end of the magnetic shaft passes through the bottom of the supporting sleeve and extends to the outside thereof, and a bolt fixing part is fixedly installed on the end of the magnetic shaft located outside the supporting sleeve, and the bolt fixing part is screwed into the threaded holes on the mounting panel and the cavity to limit the rotating sleeve, wherein a plastic spring is installed on the inner wall of the bottom of the supporting sleeve, and the plastic spring is in contact with the end of the magnetic shaft.

[0010] Preferably, a limit frame is also fixedly installed on the sliding plate frame, and a movable slider slidably connected to the inner wall of the limit frame is installed inside the limit frame, wherein a constant force spring is connected between the movable slider and the bottom inner wall of the limit frame, and a retractable shaft is fixedly installed on the movable slider, and a limit groove is provided on the inner wall of the cavity, and the retractable shaft slides in a limited manner in the limit groove.

[0011] Preferably, the limiting groove body includes a sliding groove body, an inclined snap-fit ​​groove body disposed at both ends of the sliding groove body and connected thereto, and an L-shaped reset groove body that is in a connected state with both the inclined snap-fit ​​groove body and the sliding groove body.

[0012] Preferably, a guide panel is fixedly installed at the connection point between the L-shaped reset groove body and the sliding groove body and in the inclined snap-in groove body, and one side of the guide panel is an inclined surface and the other side is a right-angle surface, and a spring body is connected between the sliding plate frame and the inner wall of the cavity end.

[0013] Preferably, a plurality of rigid brackets are fixedly mounted on the outer wall of the hinged portion, and sensing elements are mounted on the rigid brackets.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses the gear body to make the hinge part rotatably connected with its inner wall rotate with it, and the hinge part applies a force to one end of the connecting rod frame during the rotation process, so that the connecting rod frame is driven by the force to rotate the crankshaft, and the gear body rotates counterclockwise. During the movement of the hinge part from a high position to a low position, under the action of the hinge part, the rotation amplitude is large, and the descending speed of the crankshaft is slow. When the hinge part moves from a low position to a high position, the rotation amplitude is small, and then the rising speed of the crankshaft is fast, so that the crankshaft drives the punch to move with a slow downward speed and a fast return speed. The structural design of the present invention can effectively ensure that the material is in a relatively uniform state of force during the stamping process, and the efficiency of the stamping work is improved compared with the prior art; 2. The present invention changes the position of the articulated rod frame in the articulated frame to change the length of the articulated portion, thereby changing the angle between the articulated rod frame and the connecting rod frame. By changing the angle value between the articulated rod frame and the connecting rod frame, the rotation amplitude of the connecting rod frame can be effectively controlled, so that the ratio of the pressing and returning time of the punch is changed, so as to facilitate efficient stamping work on different materials; 3. The present invention can effectively fix the articulated rod frame through the positional relationship between the telescopic parts and the card slots. The telescopic parts are arranged in a staggered filling manner so that after the card slots change in any position, part of the telescopic parts will still enter the card slots, and the remaining part of the telescopic parts will be located between the two card slots to appear squeezed. The telescopic parts entering the card slots can fix the articulated rod frame, thereby achieving the purpose of fixing the articulated rod frame after the position is adjusted. 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; Figure 3 It is a schematic diagram of the separation of some structures of the present invention; Figure 4 It is a schematic diagram of the structure of the gear body, hinged part and connecting rod frame of the present invention; Figure 5 It is a schematic diagram of the structure of the hinge part of the present invention; Figure 6 It is a schematic diagram of the separation of the hinged frame and the hinged rod frame structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the convex chamber of the present invention; Figure 8 This is a schematic diagram of the internal structure of the cavity of the present invention; Fig. 9 This is a schematic diagram of the structure of the sliding plate frame of the present invention; Fig.10 It is a schematic diagram of the local structure of the sliding plate frame and the rotating sleeve structure of the present invention; Fig.11 This is a schematic diagram of the internal structure of the rotating sleeve of the present invention; Fig.12 It is a schematic diagram of the separation of the internal structure of the rotating sleeve and the extension shaft structure of the present invention; Fig.13 This is a schematic diagram of the internal structure of the support sleeve of the present invention; Fig.14 It is a schematic diagram of the structure of the convex chamber and the telescopic member of the present invention; Fig.15 It is a schematic diagram of the structure of the limiting groove body of the present invention; Fig.16 It is a schematic diagram of the telescopic member and the card slot structure of the present invention.

[0016] In the figure: 1, frame; 2, crankshaft; 3, punch; 4, transmission unit; 5, toothed shaft body; 6, shaft sleeve group; 7, gear body; 8, hinged part; 81, hinged frame; 82, hinged rod frame; 821, convex chamber; 822, slot; 83, cavity; 84, sliding plate frame; 841, magnetic plate frame; 842, limit frame; 843, moving slider; 844, constant force spring; 845, telescopic shaft body; 85, rotating sleeve; 851, spiral groove body 1; 852, buffer spring; 853, installation panel; 86, meshing gear; 87 , meshing gear row; 88, extension shaft; 89, connecting disc frame; 80, telescopic member; 801, connecting panel; 802, rolling ball; 9, connecting rod frame; 10, connecting bracket; 101, supporting sleeve; 102, spiral groove body II; 103, magnetic shaft body; 104, sliding shaft body; 105, bolt fixing part; 106, plastic spring; 11, limiting groove body; 111, sliding groove body; 112, inclined snap-on groove body; 113, L-shaped reset groove body; 114, guide panel; 12, spring body; 13, rigid bracket; 131, sensing element. 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 1-16 The present invention provides a technical solution: a connecting rod driven variable speed punching machine with a gear sleeve, the present invention makes corresponding improvements to the technical problems in the background technology, including a frame 1, a crankshaft 2 rotatably connected to the inner wall of the frame 1, and a punch 3 connected to the crankshaft 2 (such as the attached Figure 3As shown), a transmission unit 4 connected to the power source is also installed inside the frame 1. It should be noted that the power source mentioned above can adopt a drive unit such as a reducer or a motor. Since the power source is a relatively common prior art component, the present invention does not describe it too much. A toothed shaft body 5 is installed on the transmission unit 4, and a shaft sleeve group 6 is fixedly installed inside the frame 1, and a gear body 7 is rotatably installed between the shaft sleeve groups 6, that is, the gear body 7 is located inside the frame 1 and connected to the inner wall of the frame 1 through the shaft sleeve group 6. The shaft sleeve group 6 is two shaft sleeves fixedly connected to the inner wall of the frame 1, and the gear body 7 is installed between the two shaft sleeves. The two shaft sleeves serve to limit the gear body 7. The gear body 7 is meshed with the toothed shaft body 5, and the end of the crankshaft 2 is rotatably connected to the shaft sleeve group 6, and one end of the crankshaft 2 is located inside the gear body 7. The gear body 7 is provided with The hinge part 8 has one end which is rotatably connected to the inner wall of the gear body 7, wherein a connecting rod frame 9 is fixedly installed at one end of the crankshaft 2 located inside the gear body 7, and one end of the connecting rod frame 9 is fixedly connected to the hinge part 8. The rotation of the gear body 7 causes the hinge part 8 to apply a force to the end of the connecting rod frame 9, and the crankshaft 2 rotates in the frame 1 through the connecting rod frame 9, so that the return speed of the crankshaft 2 is greater than the downward speed, and a plurality of rigid brackets 13 are fixedly installed on the outer wall of the hinge part 8, and a sensing element 131 is installed on the rigid bracket 13. It should be noted that the sensing element 131 is close to the rigid bracket 13 (but not in contact with the rigid bracket 13). When the outer wall of the hinge part 8 undergoes a large deformation, the rigid bracket 13 will act on the sensing element 131, and the sensing element 131 controls the alarm system to generate an alarm, informing the staff to shut down and inspect the hinge part 8; Combined with Figure 1 and attached Figure 2 As shown, the transmission unit 4 connected to the power source rotates to drive the toothed shaft body 5 to rotate synchronously therewith. The toothed shaft body 5 will mesh with the gear body 7 during the rotation, and then the gear body 7 will perform limited rotation in the shaft sleeve group 6. Since one end of the hinged portion 8 is rotationally connected to the inner wall of the gear body 7, the other end (of the hinged portion 8) is fixedly connected to one end of the connecting rod frame 9, and the connecting rod frame 9 is fixedly connected to the crankshaft 2, when the gear body 7 rotates (counterclockwise), the gear body 7 drives the hinged portion 8 to rotate synchronously, and the hinged portion 8 applies a force to one end of the connecting rod frame 9 during the rotation, so that the connecting rod frame 9 is subjected to the force to drive the crankshaft 2 to rotate. Figure 4It can be seen that when the gear body 7 rotates counterclockwise, if the hinge 8 moves from a high position to a low position, the hinge 8 makes the rotation amplitude larger, and the descending speed of the crankshaft 2 is slower. When the hinge 8 moves from a low position to a high position, the rotation amplitude is smaller, and the rising speed of the crankshaft 2 is faster, so that the crankshaft 2 drives the punch 3 to move with a slow downward speed and a fast return speed. Then, through the structural design of the present invention, the downward speed of the punch 3 is slower than the return speed, so as to ensure that the force on the material is in a relatively uniform state, while avoiding the influence on the work efficiency. Furthermore, during the punching process, due to the different characteristics of different materials, in order to effectively improve the punching quality and efficiency, the present invention designs the hinge 8 so that the pressing and return speeds of the punch 3 can be temporarily adjusted to achieve the stamping work adapted to different materials; in view of this, the present invention makes the following designs: Combined with Figure 5 As shown, the hinged portion 8 includes an hinged frame 81 rotatably connected to the inner wall of the gear body 7 and an hinged rod frame 82 fixedly connected to the end of the connecting rod frame 9. The hinged rod frame 82 is slidably connected to the hinged frame 81, and then by changing the position of the hinged rod frame 82 in the hinged frame 81, the length of the entire hinged portion 8 can be effectively increased, thereby changing the angle between the hinged rod frame 82 (one end of the hinged portion 8 mentioned above) and the connecting rod frame 9. By changing the angle value between the hinged rod frame 82 and the connecting rod frame 9, the rotation amplitude of the connecting rod frame 9 (i.e., the crankshaft 2) can be effectively controlled, thereby changing the downward pressing and return time ratio of the punch 3. Figure 6 and attached Figure 7 As shown, the outer wall of the hinge frame 81 is provided with a cavity 83, and a slide plate frame 84 for sealing the cavity 83 is installed on the outer wall of the hinge frame 81, a spring body 12 is connected between the slide plate frame 84 and the inner wall of the end of the cavity 83, and the slide plate frame 84 is slidably connected to the inner wall of the cavity 83, and the spring body 12 is connected to the inner wall of the cavity 83. Figure 8-10As shown, a plurality of rotating sleeves 85 rotatably connected to the inner wall thereof are installed inside the cavity 83, and a meshing gear 86 is fixedly installed at one end of the rotating sleeve 85, wherein a meshing gear row 87 is fixedly installed on the side wall of the sliding plate frame 84, and the meshing gear 86 is located on the movement trajectory of the meshing gear row 87, and a plurality of convex chambers 821 are opened on the hinged rod frame 82, and the convex chambers 821 correspond to the rotating sleeve 85 one by one, and an extension shaft body 88 is arranged inside the rotating sleeve 85, and one end of the extension shaft body 88 passes through the inner wall of the hinged frame 81 and extends to the inside of the convex chamber 821, and the extension shaft body 88 is slidably connected to the inner wall of the hinged frame 81, and a connecting disc frame 89 is fixedly installed at the end of the extension shaft body 88, and a plurality of telescopic members 80 are symmetrically installed on the connecting disc frame 89, and a plurality of card grooves 822 adapted to the ends of the telescopic members 80 are symmetrically opened on the inner wall of the convex chamber 821, wherein the extension shaft body 88 is located at the inner wall of the convex chamber 821, and the extension shaft body 88 is located at the inner wall of the convex chamber 821. A connecting panel 801 is fixedly installed at one end of the rotating sleeve 85, and a rolling ball 802 is installed on the outer wall of the connecting panel 801, and a spiral groove 851 is provided on the inner wall of the rotating sleeve 85. The rolling ball 802 is located inside the spiral groove 851 and can slide along the trajectory of its inner wall. A buffer spring 852 is fixedly installed on the inner wall of the bottom of the rotating sleeve 85, and the buffer spring 852 is in contact with the connecting panel 801. It should be noted that the multiple slots 822 located in the convex chamber 821 are arranged at equal distances, and the multiple telescopic members 80 located on the connecting disc frame 89 are arranged in a staggered filling manner. When the articulated rod frame 82 moves, the convex chamber 821 located therein moves synchronously with the articulated rod frame 82, and then the slots 822 in the convex chamber 821 will change their positions accordingly. Since the telescopic members 80 are arranged in a staggered filling manner, that is, the attached Fig.16 As shown, when the position of the slot 822 changes, part of the telescopic member 80 will enter the slot 822, and the remaining part of the telescopic member 80 will be located between the two slots 822 to be squeezed. It should be noted that when the slide plate frame 84 seals the cavity 83, the spring body 12 connected between the slide plate frame 84 and the inner wall of the cavity 83 is in a compressed state; A magnetic plate frame 841 is also fixedly installed on the sliding plate frame 84, and the magnetic plate frame 841 is located on one side of the meshing gear row 87. A connecting bracket 10 is symmetrically fixedly installed on the inner wall of the cavity 83, and a supporting sleeve 101 is fixedly installed on the connecting bracket 10. A spiral groove 102 is provided on the inner wall of the supporting sleeve 101, and a mounting panel 853 is fixedly installed on the rotating sleeve 85. The mounting panel 853 and the inner wall of the cavity 83 are both provided with threaded holes. A magnetic shaft 103 is arranged inside the supporting sleeve 101, and the magnetic pole of the magnetic shaft 103 is the same as that of the magnetic plate frame 841, and a positioning shaft 103 is fixedly installed on the top of the magnetic shaft 103. The sliding shaft 104 inside the spiral groove body 102 can slide within the spiral groove body 102. One end of the magnetic shaft 103 passes through the bottom of the support sleeve 101 and extends to the outside. The end of the magnetic shaft 103 located outside the support sleeve 101 is fixedly installed with a bolt fixing part 105. The bolt fixing part 105 is screwed into the threaded holes on the installation panel 853 and the cavity 83 to limit the rotation of the sleeve 85. Then, the bolt fixing part 105 is screwed into the threaded hole to fix the installation panel 853. A plastic spring 106 is installed on the inner wall of the bottom of the support sleeve 101, and the plastic spring 106 is in contact with the end of the magnetic shaft 103. It should be noted that when the bolt fixing part 105 is screwed into the threaded hole, the plastic spring 106 is in a compressed state. A limit frame 842 is also fixedly installed on the sliding plate frame 84. A movable slider 843 slidably connected to its inner wall is installed inside the limit frame 842, wherein a constant force spring 844 is connected between the movable slider 843 and the inner wall of the bottom of the limit frame 842, and a retractable shaft 845 is fixedly installed on the movable slider 843, and a limit groove 11 is provided on the inner wall of the cavity 83, and the retractable shaft 845 slides in a limited position in the limit groove 11. The invention is further defined as follows: the limit groove body 11 includes a sliding groove body 111, an inclined snap-fit ​​groove body 112 disposed at both ends of the sliding groove body 111 and connected thereto, and an L-shaped reset groove body 113 in a connected state with the inclined snap-fit ​​groove body 112 and the sliding groove body 111, wherein a guide panel 114 is fixedly installed at the connection between the L-shaped reset groove body 113 and the sliding groove body 111 and in the inclined snap-fit ​​groove body 112, and one side of the guide panel 114 is an inclined surface and the other side is a right-angled surface. It should be noted that when the sliding plate frame 84 seals the cavity 83, the retractable shaft body 845 is located at the clamping part of the inclined snap-fit ​​groove body 112 (such as the attached Fig.15 As shown, an arc-shaped snap-in groove is provided at the inclined snap-in groove body 112, and the arc-shaped snap-in groove is the snap-in position). When the telescopic shaft body 845 is located in the inclined snap-in groove body 112, the constant force spring 844 is in a stretched state; In the specific use process, when the material of the workpiece being punched changes, in order to improve the punching quality and efficiency, the angle value between the hinged rod frame 82 and the connecting rod frame 9 (i.e. the length of the hinged portion 8) can be adjusted to achieve the purpose of controlling the rotation amplitude of the connecting rod frame 9 (i.e. the crankshaft 2); Fig.15 As shown in the figure: in the initial state, that is, the articulated rod frame 82 has not been adjusted in position in the articulated frame 81, the telescopic shaft body 845 is located at the clamping position of the inclined clamping slot body 112, and the multiple telescopic members 80 on the connecting plate frame 89 are partially in the clamping slot 822, and the remaining telescopic members 80 are in a compressed state. In the present invention, the telescopic members 80 are preferably made of a material with higher strength; when it is necessary to adjust the length of the hinged portion 8 (that is, adjust the position of the articulated rod frame 82 in the articulated frame 81), the working A person can push the slide frame 84 toward the hinged frame 81 (the hinged frame 81 and the inner wall of the cavity 83 leave a movement distance for the slide frame 84). When the slide frame 84 is pushed to a position where it cannot be pushed, since the retractable shaft 845 is located in the inclined snap-fit ​​groove 112, the constant force spring 844 is in a stretched state. When the slide frame 84 is pushed to a position where it cannot be pushed, the retractable shaft 845 moves from the snap-fitting position of the inclined snap-fit ​​groove 112 to the L-shaped reset groove 113. Fig.15 As shown, when the telescopic shaft 845 moves to the L-shaped reset groove 113, under the action of the constant force spring 844 in the stretched state, the movable slider 843 moves downward in the limit frame 842, and the telescopic shaft 845 drops to the bottom of the L-shaped reset groove 113, and then the limited state of the slide frame 84 is released. The staff lets go and pulls the slide frame 84 outward to make it move in a directional manner. In this process, the telescopic shaft 845 moves along the trajectory of the L-shaped reset groove 113, and during the movement of the slide frame 84, it passes through the guide panel 114 and enters the slide groove 111. It should be noted that, in combination with the attached Fig.15As shown, the inclined snap-fitting groove body 112 and the L-shaped reset groove body 113 corresponding to the two ends of the sliding groove body 111 are both equipped with guide panels 114, wherein the guide panels 114 located at the intersection of the three (i.e., the intersection of the sliding groove body 111, the inclined snap-fitting groove body 112 and the L-shaped reset groove body 113): the guide panels 114 located at one side of the L-shaped reset groove body 113 are inclined surfaces, and the guide panels 114 located at one side of the sliding groove body 111 are right-angled surfaces, and the guide panels 114 in the inclined snap-fitting groove body 112: the guide panels 114 close to the inclined snap-fitting groove body 112 are inclined surfaces. One side of the clamping part is a right-angled surface, and the side away from the clamping part of the inclined clamping groove body 112 is an inclined surface; when the staff lets go and pulls the slide plate frame 84 outward to make it move in a directional manner, the retractable shaft body 845 passes through the inclined surface of the guide panel 114 located at the intersection of the three, and at this time, the retractable shaft body 845 contracts and enters the slide groove body 111, and the retractable shaft body 845 finally moves to the clamping part of the inclined clamping groove body 112 corresponding to the other end of the slide groove body 111; When the sliding plate frame 84 moves toward the outside of the cavity 83, the magnetic plate frame 841 moves synchronously with it, that is, the magnetic plate frame 841 leaves the top of the magnetic shaft 103, and the magnetic shaft 103 moves upward under the action of the compressed plastic spring 106, and then the sliding shaft 104 on the magnetic shaft 103 moves along the trajectory of the spiral groove 102, that is, the magnetic shaft 103 drives the bolt fixing part 105 to perform an upward rotational movement, so that the bolt fixing part 105 leaves the threaded hole of the mounting panel 853, the fixing of the mounting panel 853 is released, and the sliding plate frame 84 continues to move, and then the meshing gear row 87 meshes with the meshing gear 86, and the meshing gear 86 drives the rotating sleeve 85 to rotate. Since the mounting panel 853 is fixedly mounted on the rotating sleeve 85 , and at this time, the fixation of the installation panel 853 is released, and then the installation panel 853 rotates synchronously with the rotating sleeve 85. During the rotation of the rotating sleeve 85, the threaded groove body on the inner wall of the rotating sleeve 85 exerts a force on the rolling ball 802 on the outer wall of the connecting panel 801, and the connecting panel 801 is fixedly installed at the end of the extension shaft body 88, and the extension shaft body 88 is slidably connected with the inner wall of the hinge frame 81. Then, when the threaded groove body exerts a force on the rolling ball 802, the rolling ball 802 drives the extension shaft body 88 to move downward through the connecting panel 801. During the descent of the connecting panel 801, the buffer spring 852 is squeezed, and during the descent of the extension shaft body 88, the multiple telescopic members 80 on the connecting disc frame 89 leave the card slot 822, thereby releasing the restriction on the hinged rod frame 82; The staff pulls the articulated rod frame 82 to increase the length of the articulated portion 8, thereby adjusting the angle value between the articulated rod frame 82 and the connecting rod frame 9 to achieve the purpose of controlling the rotation amplitude of the connecting rod frame 9 (i.e., the crankshaft 2); after the adjustment is completed, the staff continues to pull the sliding plate frame 84 outwards, and when the sliding plate frame 84 is pulled to a position where it cannot be pulled, the retractable shaft body 845 is located in the L-shaped reset groove body 113, and under the action of the constant force spring 844 in a stretched state, the moving slider 843 moves downward in the limit frame 842, and the retractable shaft body 845 drops to the bottom of the L-shaped reset groove body 113, and then the limited state of the sliding plate frame 84 is released, and then the staff pushes the sliding plate frame 84, and the retractable shaft body 845 enters the sliding groove body 111 through the inclined surface of the guide panel 114, and finally moves to the clamping position in another inclined clamping groove body 112, that is, the sliding plate frame 84 returns to the initial state; During this process, the meshing tooth row 87 on the sliding plate frame 84 meshes with the meshing gear 86, and then the meshing gear 86 reverses, so that under the action of the threaded groove body 1 on the inner wall of the rotating sleeve 85 and the buffer spring 852, the connecting panel 801 drives the extension shaft body 88 to move upward through the rolling ball 802, so that the multiple telescopic parts 80 on the connecting plate frame 89 move into the slot 822. When the slot 822 changes position, some of the telescopic parts 80 will enter the slot 822, and the remaining part of the telescopic parts 80 will be located between the two slots 822 to appear to be squeezed. The telescopic parts 80 entering the slot 822 will limit the hinged rod frame 82. When the meshing tooth row 87 is not meshed with the meshing gear 86, the magnetic plate frame 841 then moves to the top of the magnetic shaft body 103 to generate a repulsive force on the magnetic shaft body 103, thereby The magnetic shaft 103 is caused to move downward. During the descending process, the sliding shaft 104 on the outer wall of the magnetic shaft 103 moves along the trajectory of the spiral groove body 102, so that the bolt fixing member 105 is selected into the threaded hole between the mounting panel 853 and the inner wall of the cavity 83, thereby fixing the mounting panel 853, that is, limiting the rotating sleeve 85. Under the action of the above-mentioned components, the telescopic member 80 limits the articulated rod frame 82 in the slot 822, so as to fix the articulated rod frame 82, so as to effectively adjust the length of the hinged part 8. By adjusting the length of the hinged part 8, the angle value between the articulated rod frame 82 and the connecting rod frame 9 can be adjusted, so as to achieve the purpose of controlling the rotation amplitude of the connecting rod frame 9 (that is, the crankshaft 2), so that the ratio of the downward pressing and return speeds of the punch 3 changes, so as to adapt to the stamping work of different materials.

[0019] 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.

[0020] 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 connecting rod driven variable speed punch press with a gear sleeve, characterized in that: The invention comprises a frame (1), a crankshaft (2) rotatably connected to the inner wall of the frame (1), and a punch (3) connected to the crankshaft (2), wherein a transmission unit (4) connected to a power source is also installed inside the frame (1), a toothed shaft body (5) is installed on the transmission unit (4), a shaft sleeve group (6) is fixedly installed inside the frame (1), and a gear body (7) is rotatably installed between the shaft sleeve group (6), the gear body (7) is meshed with the toothed shaft body (5), an end of the crankshaft (2) is rotatably connected to the shaft sleeve group (6), and one end of the crankshaft (2) is located at the gear Inside the body (7), a hinged portion (8) is provided inside the gear body (7), one end of the hinged portion (8) is rotatably connected to the inner wall of the gear body (7), wherein one end of the crankshaft (2) located inside the gear body (7) is fixedly mounted with a connecting rod frame (9), one end of the connecting rod frame (9) is fixedly connected to the hinged portion (8), the gear body (7) rotates so that the hinged portion (8) applies a force to the end of the connecting rod frame (9), the crankshaft (2) rotates inside the frame (1) through the connecting rod frame (9), so that the return speed of the crankshaft (2) is greater than the downward pressing speed.

2. A connecting rod driven variable speed punch press with a gear sleeve according to claim 1, characterized in that: The hinged portion (8) comprises a hinged frame (81) rotatably connected to the inner wall of the gear body (7) and a hinged rod frame (82) fixedly connected to the end of the connecting rod frame (9); the hinged rod frame (82) is slidably connected to the hinged frame (81); a cavity (83) is provided on the outer wall of the hinged frame (81); and a sliding plate frame (84) for sealing the cavity (83) is mounted on the outer wall of the hinged frame (81); the sliding plate frame (84) is slidably connected to the inner wall of the cavity (83).

3. A connecting rod driven variable speed punch press with a gear sleeve according to claim 2, characterized in that: A plurality of rotating sleeves (85) rotatably connected to the inner wall of the cavity (83) are installed inside the cavity (83), and a meshing gear (86) is fixedly installed on one end of the rotating sleeve (85), wherein a meshing gear row (87) is fixedly installed on the side wall of the sliding plate frame (84), and the meshing gear (86) is located on the movement track of the meshing gear row (87). A plurality of convex chambers (821) are opened on the hinged rod frame (82), and the convex chambers (821) correspond to the rotating sleeves (85) one by one. An extension shaft (88) is arranged inside the rotating sleeve (85), and one end of the extension shaft (88) passes through the inner wall of the hinged frame (81) and extends to the inside of the convex chamber (821), and the extension shaft (88) is slidably connected to the inner wall of the hinged frame (81).

4. The connecting rod driven variable speed punch press with a gear sleeve according to claim 3, characterized in that: A connecting disc frame (89) is fixedly mounted on the end of the extension shaft (88), and a plurality of telescopic members (80) are symmetrically mounted on the connecting disc frame (89), and a plurality of slots (822) adapted to the ends of the telescopic members (80) are symmetrically opened on the inner wall of the convex chamber (821), wherein a connecting panel (801) is fixedly mounted on one end of the extension shaft (88) located inside the rotating sleeve (85), and a rolling ball (802) is mounted on the outer wall of the connecting panel (801), and a spiral groove body (851) is arranged on the inner wall of the rotating sleeve (85), and the rolling ball (802) is located inside the spiral groove body (851) and can slide along the track of the inner wall thereof, and a buffer spring (852) is fixedly mounted on the inner wall of the bottom of the rotating sleeve (85), and the buffer spring (852) is in contact with the connecting panel (801).

5. The connecting rod driven variable speed punch press with gear sleeve according to claim 3, characterized in that: A magnetic plate frame (841) is also fixedly mounted on the sliding plate frame (84), and the magnetic plate frame (841) is located on one side of the meshing tooth row (87), wherein a connecting bracket (10) is symmetrically fixedly mounted on the inner wall of the cavity (83), a supporting sleeve (101) is fixedly mounted on the connecting bracket (10), and a second spiral groove body (102) is provided on the inner wall of the supporting sleeve (101), and a mounting panel (853) is fixedly mounted on the rotating sleeve (85), and threaded holes are provided on the mounting panel (853) and the inner wall of the cavity (83).

6. The connecting rod driven variable speed punch press with gear sleeve according to claim 5, characterized in that: A magnetic shaft (103) is arranged inside the support sleeve (101), and the magnetic shaft (103) and the magnetic plate frame (841) have the same magnetic poles, and a sliding shaft (104) located inside the second spiral groove body (102) is fixedly installed on the top of the magnetic shaft (103), and the sliding shaft (104) can slide within the second spiral groove body (102) within a limited position, and one end of the magnetic shaft (103) passes through the bottom of the support sleeve (101) and extends to the outside thereof, and a bolt fixing member (105) is fixedly installed on one end of the magnetic shaft (103) located outside the support sleeve (101), and the bolt fixing member (105) is screwed into the threaded holes on the mounting panel (853) and the cavity (83) to limit the rotating sleeve (85), wherein a plastic spring (106) is installed on the inner wall of the bottom of the support sleeve (101), and the plastic spring (106) is in contact with the end of the magnetic shaft (103).

7. The connecting rod driven variable speed punch press with a gear sleeve according to claim 2, characterized in that: A limit frame (842) is also fixedly mounted on the sliding plate frame (84), and a movable slider (843) is mounted inside the limit frame (842) and is slidably connected to the inner wall thereof, wherein a constant force spring (844) is connected between the movable slider (843) and the inner wall at the bottom of the limit frame (842), and a telescopic shaft (845) is fixedly mounted on the movable slider (843), and a limit groove (11) is provided on the inner wall of the cavity (83), and the telescopic shaft (845) slides in a limited position in the limit groove (11).

8. The connecting rod driven variable speed punch press with gear sleeve according to claim 7, characterized in that: The limiting groove body (11) comprises a sliding groove body (111), an inclined clamping groove body (112) disposed at both ends of the sliding groove body (111) and connected thereto, and an L-shaped resetting groove body (113) which is in a state of connection with both the inclined clamping groove body (112) and the sliding groove body (111).

9. The connecting rod driven variable speed punch press with gear sleeve according to claim 8, characterized in that: A guide panel (114) is fixedly installed at the connection point between the L-shaped reset groove body (113) and the sliding groove body (111) and in the inclined clamping groove body (112), and one side of the guide panel (114) is an inclined surface and the other side is a right-angled surface. A spring body (12) is connected between the sliding plate frame (84) and the inner wall of the end of the cavity (83).

10. The connecting rod driven variable speed punch press with gear sleeve according to claim 1, characterized in that: A plurality of rigid brackets (13) are fixedly mounted on the outer wall of the hinged portion (8), and a sensing element (131) is mounted on the rigid bracket (13).

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