Toggle link assembly for a punch press

Abstract

The application discloses a toggle type connecting rod assembly for punch, and belongs to the technical field of punch transmission mechanism, and aims to provide a toggle type connecting rod assembly for punch which can reduce the load of moving parts, comprising a rack, a crankshaft, a die holder plate and a counterweight plate, the rack comprises a pair of configuration plates, the lower end of each configuration plate is fixedly connected with a lower guide column, and the upper end is fixedly connected with an upper guide column, all the lower guide columns and the upper guide columns are parallel, the crankshaft comprises a swing shaft, each end of the swing shaft is connected with a main shaft end through a rotating plate, the two rotating plates are parallel, the axis lines of the two main shaft ends are collinear, each configuration plate is provided with a main shaft hole, and the main shaft end is adapted to pass through the main shaft hole to form a rotating pair, the heavy mass moving parts are dispersed through the design of the counterweight plate and the die holder plate above and below the crankshaft, the load of a single connecting rod is reduced, the inertia of the moving parts is reduced while the structural strength is ensured, the maximum load of a single part is reduced, and the stable output of the driver is facilitated.

Description

Technical Field

[0001] This application relates to the field of punch press transmission mechanism technology, and in particular to a toggle linkage assembly for a punch press. Background Technology

[0002] The punch press drives the stamping die up and down through the crankshaft and connecting rod structure to achieve the stamping work. Since the stamping die itself has a large mass, the connecting rod structure that drives the stamping die usually needs to have a lot of material and a large mass in order to ensure the structural strength of the transmission. The large mass of the components not only increases the inertia during movement, increasing the maximum load of other moving parts, but also reduces the operational stability of the drive. Utility Model Content

[0003] The purpose of this application is to provide a toggle-type linkage assembly for a punch press that can reduce the load on moving parts.

[0004] To achieve the above objectives, this application provides a toggle-type connecting rod assembly for a punch press: including a frame, a crankshaft, a die base plate, and a counterweight plate. The frame includes a pair of mounting plates, each mounting plate having a lower guide post fixedly connected to its lower end and an upper guide post fixedly connected to its upper end. All the lower and upper guide posts are parallel. The crankshaft includes a swing shaft, each end of which is connected to a spindle end via a rotating plate. The two rotating plates are parallel, and the axes of the two spindle ends are collinear. Each mounting plate has a spindle hole suitable for the spindle end to pass through to form a rotating pair. The die base plate is slidably fitted with the lower guide post. The crankshaft is movably connected to the die base plate via a lower connecting rod. The counterweight plate is slidably fitted with the upper guide post. The crankshaft is movably connected to the counterweight plate via an upper connecting rod. The die base plate and the counterweight plate can rise and fall simultaneously, distributing the weight of the moving parts above and below the crankshaft, thereby effectively reducing the maximum load on some moving parts.

[0005] As a preferred embodiment, the upper surface of the mold base plate has a lower hinge frame, the lower end of the lower connecting rod cooperates with the lower hinge frame to form a rotating pair, and the upper end of the lower connecting rod cooperates with the swing shaft to form a rotating pair, thus forming a crankshaft slider mechanism.

[0006] As a preferred embodiment, the lower surface of the counterweight plate has an upper hinge frame, the upper end of the upper connecting rod cooperates with the upper hinge frame to form a rotating pair, and the lower end of the upper connecting rod cooperates with the swing shaft to form a rotating pair, so that the upper connecting rod can be adaptively adjusted in angle during the up and down movement.

[0007] As a preferred embodiment, there are two upper connecting rods, and the lower connecting rod is located between the two upper connecting rods. The two upper connecting rods are symmetrical about the lower connecting rod, so that the crankshaft's balance shaft is subjected to a symmetrical load, which can effectively reduce the bending deformation of the balance shaft.

[0008] As a preferred embodiment, the mold base plate is provided with a lower guide hole, which is suitable for the lower guide post to pass through to form a sliding pair, thereby restricting the degree of freedom of the mold base plate and improving the stability of the up-and-down reciprocating motion of the mold base plate.

[0009] As a preferred embodiment, each of the lower guide posts is fixedly connected to a limit ring at its lower end for fixed connection with the punch press body, thereby ensuring the stable installation of the toggle linkage assembly.

[0010] As a preferred embodiment, the counterweight plate has an upper guide hole, which is suitable for the upper guide post to pass through to form a sliding pair, thereby restricting the degree of freedom of the counterweight plate and improving the stability of the up-and-down reciprocating motion of the counterweight plate.

[0011] As a preferred embodiment, the upper ends of all the upper guide posts are fixedly connected to a bridging plate to limit the spacing between the upper ends of the upper guide posts, while ensuring the stability of the spacing between the two configuration plates through the upper guide posts.

[0012] Compared with the prior art, the beneficial effects of this application are as follows:

[0013] (1) By designing counterweight plates and mold base plates located above and below the crankshaft respectively, the large mass moving parts are dispersed, the load of a single connecting rod is reduced, thereby reducing the inertia of the moving parts while ensuring structural strength, reducing the maximum load strength of a single part, and also facilitating stable output of the drive.

[0014] (2) The design constrains the die base plate and counterweight plate through two sets of guide structures, which makes the punch press have good stability when working. On the other hand, due to the reduction of the inertia of some components, the maximum load of the crankshaft bearing is also reduced, which not only improves the output stability of the driver, but also reduces energy consumption. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the toggle-type connecting rod assembly used in this punch press.

[0016] Figure 2 This is a first three-dimensional structural diagram of the crankshaft of the toggle-type connecting rod assembly for the punch press, which is connected to the die base plate and the configuration plate via the connecting rod.

[0017] Figure 3 This is a second three-dimensional structural diagram showing the crankshaft of the toggle-type connecting rod assembly for the punch press connected to the die base plate and the configuration plate via the connecting rod.

[0018] Figure 4 This is a three-dimensional structural diagram of the upper and lower connecting rods of the toggle-type connecting rod assembly for the punch press, showing their interaction with the crankshaft.

[0019] Figure 5This is a three-dimensional structural diagram of the crankshaft of the toggle-type connecting rod assembly for this punch press.

[0020] Figure 6 This is a three-dimensional structural diagram of the die base plate of the toggle-type connecting rod assembly for the punch press.

[0021] Figure 7 This is a three-dimensional structural diagram of the counterweight plate of the toggle-type connecting rod assembly for this punch press.

[0022] Figure 8 This is a three-dimensional structural diagram of the frame of the toggle-type connecting rod assembly for the punch press.

[0023] In the diagram: 1. Frame; 101. Configuration plate; 102. Spindle hole; 103. Lower guide post; 104. Limiting ring; 105. Upper guide post; 106. Bridge plate; 2. Crankshaft; 201. Swing shaft; 202. Rotary plate; 203. Spindle end; 3. Lower connecting rod; 4. Upper connecting rod; 5. Mold base plate; 501. Lower hinge frame; 502. Lower guide hole; 6. Counterweight plate; 601. Upper hinge frame; 602. Upper guide hole. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0026] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0028] like Figure 1-8 The toggle linkage assembly for the punch press shown includes a fixed frame 1, a crankshaft 2, a die base plate 5, and a counterweight plate 6 that are movable relative to the frame 1. The frame 1 includes a pair of configuration plates 101, which are parallel to each other and symmetrical. Each configuration plate 101 has a lower guide post 103 fixedly connected to its lower end and an upper guide post 105 fixedly connected to its upper end. Each configuration plate 101 has two lower guide posts 103 and two upper guide posts 105 connected to it, so there are four lower guide posts 103 and four upper guide posts 105. All the lower guide posts 103 and upper guide posts 105 are parallel and vertical.

[0029] The mold base plate 5 slides with the lower guide post 103. To achieve a stable fit, the mold base plate 5 has lower guide holes 502 at the four corners, which allow the four lower guide posts 103 to pass through and form a sliding pair. The lower end of each lower guide post 103 is fixedly connected to a limit ring 104, and the lower guide post 103 is fixedly connected to the punch press body through the limit ring 104. The counterweight plate 6 also slides with the upper guide post 105. Similarly, to achieve a fit, the counterweight plate 6 also has upper guide holes 602 at the four corners, which allow the four upper guide posts 105 to pass through and form a sliding pair. The upper ends of all the upper guide posts 105 are fixedly connected to a bridge plate 106 to ensure the stability of the position of the upper guide post 105 and at the same time limit the stability of the distance between the two configuration plates 101.

[0030] The crankshaft 2 includes a horizontally oriented swing shaft 201. Each end of the swing shaft 201 is connected to a spindle end 203 via a rotating plate 202. One end of each rotating plate 202 is fixedly connected to the swing shaft 201, and the other end is fixedly connected to the spindle end 203. The two rotating plates 202 are parallel and symmetrical. The axes of the two spindle ends 203 are collinear but only parallel to, not collinear with, the axis of the swing shaft 201. Each configuration plate 101 has a spindle hole 102. The axes of the two spindle holes 102 are also collinear, which is used for the spindle end 203 to pass through to form a rotating pair. After passing through the spindle hole 102, the spindle end 203 will be connected to the output end of the drive mechanism of the punch press to obtain rotational power.

[0031] The crankshaft 2 is movably connected to the mold base plate 5 via the lower connecting rod 3, and the crankshaft 2 is movably connected to the counterweight plate 6 via the upper connecting rod 4. Specifically, the upper surface of the mold base plate 5 has a lower hinge frame 501, the lower end of the lower connecting rod 3 cooperates with the lower hinge frame 501 to form a rotating pair, and the upper end of the lower connecting rod 3 cooperates with the swing shaft 201 to form a rotating pair. The lower surface of the counterweight plate 6 has an upper hinge frame 601, the upper end of the upper connecting rod 4 cooperates with the upper hinge frame 601 to form a rotating pair, and the lower end of the upper connecting rod 4 cooperates with the swing shaft 201 to form a rotating pair.

[0032] Since the crankshaft 2 is a one-piece structure, the lower connecting rod 3 and the upper connecting rod 4 cannot be one piece. The lower connecting rod 3 and the upper connecting rod 4 in the attached figure are just schematic diagrams. In reality, the lower connecting rod 3 and the upper connecting rod 4 are detachable and formed into a whole through detachable connecting parts, which facilitates assembly and disassembly. In this embodiment, there are two upper connecting rods 4, and the lower connecting rod 3 is located between the two upper connecting rods 4. The two upper connecting rods 4 are symmetrical about the lower connecting rod 3, so that the force borne by the swing shaft 201 is more symmetrical and the working stability is higher.

[0033] Working principle: During use, the stamping die is fixed on the lower surface of the die base plate 5, and the counterweight block is installed on the upper surface of the counterweight plate 6. When the press drive drives the die base plate 5 to rise through the crankshaft 2, the counterweight plate 6 rises synchronously. The drive converts the rotational kinetic energy into the gravitational potential energy of the stamping die and the counterweight block. When the press drive drives the die base plate 5 to fall through the crankshaft 2, the counterweight plate 6 falls synchronously. The stamping die and the counterweight block convert their own gravitational potential energy into downward impact kinetic energy. Since the main components that generate the impact force are distributed above and below the crankshaft 2, and the die base plate 5 and the counterweight plate 6 cooperate with two sets of guide structures respectively, not only is the stability of the moving parts improved, but the mass of high-inertia components is also dispersed, effectively reducing the load on a single connecting rod. Therefore, the mass of a single connecting rod does not need to be particularly large. Under the premise of ensuring structural strength, the total weight of all connecting rods is effectively reduced, which not only reduces the output load of the press drive, but also extends the service life of the press transmission mechanism.

[0034] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A toggle-type connecting rod assembly for a punch press, characterized in that, include: The frame (1) includes a pair of configuration plates (101), each configuration plate (101) having a lower guide post (103) fixedly connected to its lower end and an upper guide post (105) fixedly connected to its upper end, and all the lower guide posts (103) and upper guide posts (105) being parallel. The crankshaft (2) includes a balance shaft (201), each end of which is connected to a main shaft end (203) via a rotating plate (202). The two rotating plates (202) are parallel, and the axes of the two main shaft ends (203) are collinear. Each configuration plate (101) has a main shaft hole (102) for the main shaft end (203) to pass through to form a rotating pair. The mold base plate (5) and the counterweight plate (6) are slidably engaged with the lower guide post (103). The crankshaft (2) is movably connected to the mold base plate (5) through the lower connecting rod (3). The counterweight plate (6) is slidably engaged with the upper guide post (105). The crankshaft (2) is movably connected to the counterweight plate (6) through the upper connecting rod (4).

2. The toggle-type connecting rod assembly for a punch press as described in claim 1, characterized in that: The upper surface of the mold base plate (5) has a lower hinge frame (501), the lower end of the lower connecting rod (3) cooperates with the lower hinge frame (501) to form a rotating pair, and the upper end of the lower connecting rod (3) cooperates with the swing shaft (201) to form a rotating pair.

3. The toggle-type connecting rod assembly for a punch press as described in claim 2, characterized in that: The lower surface of the counterweight plate (6) has an upper hinge frame (601), the upper end of the upper connecting rod (4) cooperates with the upper hinge frame (601) to form a rotating pair, and the lower end of the upper connecting rod (4) cooperates with the swing shaft (201) to form a rotating pair.

4. The toggle-type connecting rod assembly for a punch press as described in claim 3, characterized in that: There are two upper connecting rods (4), and the lower connecting rod (3) is located between the two upper connecting rods (4). The two upper connecting rods (4) are symmetrical about the lower connecting rod (3).

5. The toggle-type connecting rod assembly for a punch press as described in any one of claims 1 to 4, characterized in that: The mold base plate (5) has a lower guide hole (502) for the lower guide post (103) to pass through to form a sliding pair.

6. The toggle-type connecting rod assembly for a punch press as described in claim 5, characterized in that: Each of the lower guide posts (103) is fixedly connected to a limit ring (104) at its lower end.

7. The toggle-type connecting rod assembly for a punch press as described in any one of claims 1 to 4, characterized in that: The counterweight plate (6) has an upper guide hole (602) for the upper guide post (105) to pass through to form a sliding pair.

8. The toggle-type connecting rod assembly for a punch press as described in claim 7, characterized in that: The upper ends of all the upper guide posts (105) are fixedly connected to a bridge plate (106).

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