Large-stroke punch toggle mechanism adopting eccentric wheel

Abstract

A large-stroke punch toggle mechanism adopting an eccentric wheel comprises a crankshaft, a shaft sleeve rod, a first sliding shaft capable of moving along a straight line, a linkage assembly and a sliding block capable of moving along the straight line, the input end of the shaft sleeve rod is rotationally connected with the crankshaft, and the output end of the shaft sleeve rod is rotationally connected with the first sliding shaft. The linkage assembly comprises a lever, a first connecting rod, a swing rod, a second connecting rod and an eccentric shaft, the lever, the first connecting rod and the swing rod are sequentially connected, the eccentric shaft comprises an output eccentric wheel and an output shaft rod, the output eccentric wheel is eccentrically arranged relative to the output shaft rod, the output end of the second connecting rod is rotationally connected with the output eccentric wheel, and the sliding block is rotationally connected with the output shaft rod. According to the toggle mechanism, the technical effects of increasing the punching stroke and adjusting the punching stroke can be achieved, excessive internal space of the punching machine can be prevented from being occupied, and the requirement for miniaturization is met.

Description

Technical Field

[0001] The utility model relates to a toggle mechanism of a punch press, in particular to a toggle mechanism of a long-stroke punch press which adopts an eccentric wheel. Background Art

[0002] For punching machines, especially high-speed punching machines, processing distance is an important factor affecting product processing accuracy. In order to achieve a long-stroke punching operation, Chinese utility model CN217622330U discloses a long-stroke toggle and a punching machine using the toggle. The toggle increases the punching stroke by setting a first swing arm, a second swing arm and a third swing arm, and the punching stroke can be adjusted by replacing the second swing arm.

[0003] However, for a high-speed punch press, the internal space is relatively small, and the structure of adding a rocker rod will occupy more space of the punch press, which is not conducive to the miniaturization of the punch press. Utility Model Content

[0004] The technical scheme of the utility model is aimed at the above situation. In order to solve the above problem, a large-stroke punch machine toggle mechanism using an eccentric wheel is provided. The toggle mechanism comprises: a crankshaft, a sleeve rod, a first sliding shaft movable along a straight line, a linkage assembly and a slider movable along a straight line. The input end of the sleeve rod is rotatably connected to the crankshaft, and the output end of the sleeve rod is rotatably connected to the first sliding shaft. The linkage assembly comprises: a lever, a first connecting rod, a rocker rod, a second connecting rod and an eccentric shaft. The input end of the lever is rotatably connected to the first sliding shaft, the output end of the lever is pivotally connected to the input end of the first connecting rod, the output end of the first connecting rod is pivotally connected to the input end of the rocker rod, the output end of the rocker rod is pivotally connected to the input end of the second connecting rod, and the eccentric shaft comprises: an output eccentric wheel and an output shaft rod. The output eccentric wheel is eccentrically arranged relative to the output shaft rod, the output end of the second connecting rod is rotatably connected to the output eccentric wheel, and the slider is rotatably connected to the output shaft rod.

[0005] Furthermore, the crankshaft has a crankshaft rod and a cam, the cam is eccentrically arranged relative to the crankshaft rod, and the input end of the sleeve rod is rotationally connected to the cam.

[0006] Furthermore, there are two shaft sleeve rods and two cams, and the input ends of the two shaft sleeve rods are rotationally connected with the two cams respectively.

[0007] Further, the first sliding shaft includes: a first sliding shaft rod, a sliding shaft eccentric wheel and a first guide block, the sliding shaft eccentric wheel is offset relative to the first sliding shaft rod and the sliding shaft eccentric wheel is rotationally connected with the first sliding shaft rod, the input end of the lever is rotationally connected with the sliding shaft eccentric wheel, and the first guide block is located at one end of the first sliding shaft rod.

[0008] Furthermore, there are two first guide blocks, and the two first guide blocks are respectively located at two ends of the first sliding shaft rod.

[0009] Furthermore, the toggle mechanism also includes: a second sliding shaft, the second sliding shaft includes: a second sliding shaft rod, a second guide block and a support rod, the second guide block is located at one end of the second sliding shaft rod, the second sliding shaft rod is fixed to the support rod, and one end of the support rod is pivotally connected to the middle part of the second connecting rod.

[0010] Furthermore, there are two second guide blocks, which are respectively located at two ends of the second sliding shaft rod.

[0011] Furthermore, there are two linkage components and two sliding shaft eccentric wheels, the input ends of the levers of the two linkage components are rotationally connected with the two sliding shaft eccentric wheels respectively, and the middle parts of the second connecting rods of the two linkage components are pivotally connected with the two ends of the support rod respectively.

[0012] After adopting the above technical scheme, the beneficial effect of the utility model is: the linkage assembly of the above-mentioned toggle mechanism utilizes the eccentricity of the eccentric shaft to achieve the technical effect of increasing the stroke, that is, the eccentric shaft is used to replace the connecting rod used for output in the prior art. Since the volume of the eccentric wheel is smaller than the volume of the connecting rod, the above-mentioned toggle mechanism can not only achieve the technical effect of increasing the stamping stroke and adjusting the stamping stroke, but also avoid occupying too much internal space of the punch press, thereby meeting the demand for miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the toggle mechanism involved in the utility model;

[0014] Figure 2 It is a principle diagram of a toggle mechanism with a slider in an extreme position involved in the utility model;

[0015] Figure 3 The utility model is a schematic diagram of a toggle mechanism in which the slider is at another extreme position. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further described below by way of embodiments:

[0017] The utility model provides a large-stroke punch toggle mechanism using an eccentric wheel, combined with Figures 1 to 3As shown, the toggle mechanism includes: a crankshaft 1, a sleeve rod 2, a first sliding shaft 3 movable in a straight line, a linkage assembly 4 and a slider 5 movable in a straight line, the input end of the sleeve rod 2 is rotationally connected to the crankshaft 1, the output end of the sleeve rod 2 is rotationally connected to the first sliding shaft 3, the linkage assembly 4 includes: a lever 41, a first connecting rod 42, a rocker rod 43, a second connecting rod 44 and an eccentric shaft 45, the input end of the lever 41 is rotationally connected to the first sliding shaft 3, the output end of the lever 41 is pivotally connected to the input end of the first connecting rod 42, the output end of the first connecting rod 42 is pivotally connected to the input end of the rocker rod 43, the output end of the rocker rod 43 is pivotally connected to the input end of the second connecting rod 44, the eccentric shaft 45 includes: an output eccentric wheel 451 and an output shaft rod 452, the output eccentric wheel 451 is eccentrically arranged relative to the output shaft rod 452, the output end of the second connecting rod 44 is rotationally connected to the output eccentric wheel 451, and the slider 5 is rotationally connected to the output shaft rod 452.

[0018] Among them, the "rotational connection" in the present invention means that two components can rotate relative to each other; the "pivot connection" in the present invention means that two components can rotate relative to the same rotation axis.

[0019] When the above-mentioned toggle mechanism is working, the crankshaft 1 drives the sliding shaft 3 to move linearly through the sleeve rod 2, and the sliding shaft 3 drives the slider 5 to move linearly through the lever 41, the first connecting rod 42, the rocker rod 43, the second connecting rod 44 and the eccentric shaft 45 in turn, thereby realizing the movement of the slider 5 between the upper dead point and the lower dead point (i.e., the two extreme positions).

[0020] Among them, the linkage assembly 4 of the above-mentioned toggle mechanism achieves the technical effect of increasing the stroke by setting a second connecting rod 44, and adopts an eccentric shaft 45 to replace the connecting rod used for output in the prior art. Because the volume of the eccentric wheel will be smaller than the volume of the connecting rod when the adjustment range is equivalent, the above-mentioned toggle mechanism can not only achieve the technical effect of increasing the stamping stroke and adjusting the stamping stroke, but also avoid occupying too much internal space of the punch press, thereby meeting the demand for miniaturization.

[0021] Specifically, the stamping stroke of the slider 5 is related to the eccentricity of the eccentric shaft 45, wherein the eccentricity of the eccentric shaft 45 refers to the distance between the center of the output eccentric wheel 451 and the center of the output shaft 452. When the worker needs to adjust the stamping stroke of the slider 5, he only needs to select the eccentric shaft 45 with the corresponding eccentricity.

[0022] In this embodiment, the fulcrums of the lever 41 and the swing rod 43 are fixedly arranged. The fixed arrangement of the fulcrums of the two means that the fulcrums cannot be moved, but the lever itself can rotate around the fulcrum.

[0023] Specifically, the crankshaft 1 has a crankshaft rod 11 and a cam 12. The cam 12 is eccentrically arranged relative to the crankshaft rod 11, and the input end of the sleeve rod 2 is rotatably connected to the cam 12. The crankshaft rod 11 is used to be connected to the motor shaft of the motor, and the motor drives the crankshaft rod 11 to rotate, thereby driving the cam 12 to move around the crankshaft rod 11.

[0024] More specifically, there are two shaft sleeve rods 2 and two cams 12, and the input ends of the two shaft sleeve rods 2 are respectively rotatably connected with the two cams 12. Among them, the two shaft sleeve rods 2 and the cams 12 can make the power transmission more sufficient.

[0025] Specifically, the first slide shaft 3 includes: a first slide shaft rod 31, a slide shaft eccentric wheel 32 and a first guide block 33. The slide shaft eccentric wheel 32 is arranged to be biased relative to the first slide shaft rod 31 and the slide shaft eccentric wheel 32 is rotatably connected to the first slide shaft rod 31. The input end of the lever 41 is rotatably connected to the slide shaft eccentric wheel 32. The first guide block 33 is located at one end of the first slide shaft rod 31. When the first slide shaft rod 31 moves up and down, the slide shaft eccentric wheel 32 moves around the first slide shaft rod 31, thereby driving the lever 41 to rotate; the first guide block 33 is used to cooperate with the guide rail of the punch press to guide the movement of the first slide shaft rod 31.

[0026] More specifically, there are two first guide blocks 33, and the two first guide blocks 33 are respectively located at two ends of the first sliding shaft rod 31. The guiding effect of the two first guide blocks 33 can make the movement of the first sliding shaft rod 31 more stable.

[0027] More specifically, the toggle mechanism further includes: a second sliding shaft 6, which includes: a second sliding shaft rod 61, a second guide block 62 and a support rod 63, wherein the second guide block 62 is located at one end of the second sliding shaft rod 61, the second sliding shaft rod 61 is fixed to the support rod 63, and one end of the support rod 63 is pivotally connected to the middle of the second connecting rod 44. The second guide block 62 is used to cooperate with the guide rail of the punch press to guide the movement of the second sliding shaft rod 61 and the support rod 63; the support rod 63 can guide the swing of the second connecting rod 44, so that the movement of the second connecting rod 44 is more stable.

[0028] More specifically, there are two second guide blocks 62, and the two second guide blocks 62 are respectively located at two ends of the second sliding shaft rod 61. The guiding effect of the two second guide blocks 62 can make the movement of the second sliding shaft rod 61 more stable.

[0029] More specifically, there are two linkage components 4 and two sliding shaft eccentric wheels 32, the input ends of the levers 41 of the two linkage components 4 are respectively rotatably connected with the two sliding shaft eccentric wheels 32, and the middle parts of the second connecting rods 44 of the two linkage components 4 are respectively pivotally connected with the two ends of the support rod 63. Among them, the two linkage components 4 can make the transmission of force more balanced.

Claims

1. A toggle mechanism of a long-stroke punch press using an eccentric wheel, the toggle mechanism comprising: A crankshaft, a sleeve rod, a first sliding shaft movable in a straight line, a linkage assembly and a slider movable in a straight line, the input end of the sleeve rod being rotationally connected to the crankshaft, the output end of the sleeve rod being rotationally connected to the first sliding shaft, characterized in that: the linkage assembly comprises: a lever, a first connecting rod, a rocker rod, a second connecting rod and an eccentric shaft, the input end of the lever being rotationally connected to the first sliding shaft, the output end of the lever being pivotally connected to the input end of the first connecting rod, the output end of the first connecting rod being pivotally connected to the input end of the rocker rod, the output end of the rocker rod being pivotally connected to the input end of the second connecting rod, the eccentric shaft comprising: an output eccentric wheel and an output shaft rod, the output eccentric wheel being eccentrically arranged relative to the output shaft rod, the output end of the second connecting rod being rotationally connected to the output eccentric wheel, and the slider being rotationally connected to the output shaft rod.

2. The toggle mechanism of a long-stroke punch press using an eccentric wheel according to claim 1, characterized in that: The crankshaft comprises a crankshaft rod and a cam, wherein the cam is eccentrically arranged relative to the crankshaft rod, and the input end of the sleeve rod is rotationally connected to the cam.

3. The toggle mechanism of a long-stroke punch press using an eccentric wheel according to claim 2, characterized in that: There are two shaft sleeve rods and two cams, and the input ends of the two shaft sleeve rods are respectively rotatably connected with the two cams.

4. The toggle mechanism of a long-stroke punch press using an eccentric wheel according to claim 1, characterized in that: The first sliding shaft includes: a first sliding shaft rod, a sliding shaft eccentric wheel and a first guide block. The sliding shaft eccentric wheel is biased relative to the first sliding shaft rod and the sliding shaft eccentric wheel is rotationally connected to the first sliding shaft rod. The input end of the lever is rotationally connected to the sliding shaft eccentric wheel. The first guide block is located at one end of the first sliding shaft rod.

5. The toggle mechanism of a long-stroke punch press using an eccentric wheel according to claim 4, characterized in that: There are two first guide blocks, which are respectively located at two ends of the first sliding shaft rod.

6. The toggle mechanism of a long-stroke punch press using an eccentric wheel according to claim 4, characterized in that: The toggle mechanism also includes: a second sliding shaft, the second sliding shaft includes: a second sliding shaft rod, a second guide block and a support rod, the second guide block is located at one end of the second sliding shaft rod, the second sliding shaft rod is fixed to the support rod, and one end of the support rod is pivotally connected to the middle part of the second connecting rod.

7. The toggle mechanism of a long-stroke punch press using an eccentric wheel according to claim 6, characterized in that: There are two second guide blocks, which are respectively located at two ends of the second sliding shaft rod.

8. The toggle mechanism of a long-stroke punch press using an eccentric wheel according to claim 6, characterized in that: There are two linkage components and two sliding shaft eccentric wheels. The input ends of the levers of the two linkage components are respectively rotationally connected with the two sliding shaft eccentric wheels. The middle parts of the second connecting rods of the two linkage components are respectively pivotally connected with the two ends of the support rod.

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