CN214354356U - Cam toggle type structure - Google Patents

Abstract

The utility model belongs to the technical field of pressing machines, and relates to a toggle structure of a cam, which comprises a cam mechanism, an upper toggle mechanism, a lower toggle mechanism and a sliding piece; the cam mechanism is provided with an output end capable of reciprocating, the upper toggle mechanism and the lower toggle mechanism are both arranged on the output end of the cam mechanism, the upper toggle mechanism swings in a reciprocating manner under the action of the cam mechanism, and the upper toggle mechanism is matched with the cam mechanism to act on the lower toggle mechanism so as to enable the lower toggle mechanism to move up and down while swinging in a reciprocating manner; the sliding piece is arranged on the lower toggle mechanism and driven by the lower toggle mechanism to move up and down. The utility model discloses in, this toggle type structure simple structure can reduce the cost of manufacture, can realize the operation of drive slider to can improve operating stability.

Description

Cam toggle type structure

Technical Field

The utility model belongs to the technical field of the press, especially, relate to a cam toggle type structure.

Background

The press machine can be widely applied to the processes of cutting, punching, blanking, bending, riveting, forming and the like. Presses, such as toggle presses, typically employ a toggle mechanism in the machine to drive a slide to enable reciprocating movement of the slide. The current toggle press usually uses a crankshaft to drive a connecting rod to realize reciprocating motion, but the operation of the structure is not stable enough.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, an object of the present invention is to provide a toggle structure of cam, which has a simple structure, can reduce the manufacturing cost, can realize the operation of the driving sliding member, and can improve the operation stability.

The utility model provides a cam toggle type structure has adopted following technical scheme:

the cam toggle type structure comprises a cam mechanism, an upper toggle mechanism, a lower toggle mechanism and a sliding piece; the cam mechanism is provided with an output end capable of reciprocating, the upper toggle mechanism and the lower toggle mechanism are both arranged on the output end of the cam mechanism, the upper toggle mechanism swings in a reciprocating manner under the action of the cam mechanism, and the upper toggle mechanism is matched with the cam mechanism to act on the lower toggle mechanism so as to enable the lower toggle mechanism to move up and down while swinging in a reciprocating manner; the sliding piece is arranged on the lower toggle mechanism and driven by the lower toggle mechanism to move up and down.

The utility model discloses in, this cam toggle type structure includes cam mechanism, upper toggle mechanism, lower toggle mechanism and slider, simple structure, can practice thrift the manufacturing procedure in the preparation to reduce the cost of manufacture; in the toggle type structure, the cam mechanism is provided with an output end capable of reciprocating, the upper toggle mechanism and the lower toggle mechanism are both arranged on the output end of the cam mechanism, one side of the output end of the cam mechanism close to the upper toggle mechanism is taken as the front, and the output end of the cam mechanism can push the upper toggle mechanism and the lower toggle mechanism forwards and simultaneously or pull the upper toggle mechanism and the lower toggle mechanism backwards and forwards; the upper toggle mechanism swings back and forth under the action of the cam mechanism, the swing track of the upper toggle mechanism can be an arc track, the upper toggle mechanism is matched with the cam mechanism to act on the lower toggle mechanism to enable the lower toggle mechanism to move up and down while swinging back and forth, and understandably, when the cam mechanism pushes the upper toggle mechanism and the lower toggle mechanism forwards, the upper toggle mechanism swings forwards and is matched with the cam mechanism to enable the lower toggle mechanism to move downwards during swinging, so that the sliding piece is driven to move downwards to drive the sliding piece. In addition, in the process of pushing the lower toggle mechanism to swing by the cam mechanism, the motion stability of the lower toggle mechanism in the process of swinging and downwards moving can be improved by the cooperation of the upper toggle mechanism, and further the operation stability of the cam toggle type structure is improved.

Further, the cam mechanism comprises a connecting rod and a rotatable eccentric wheel, the connecting rod is arranged on the eccentric wheel, and under the action of the eccentric wheel, the connecting rod reciprocates back and forth; the upper toggle mechanism and the lower toggle mechanism are arranged on the connecting rod, the upper toggle mechanism swings in a reciprocating mode under the action of the connecting rod, and the upper toggle mechanism is matched with the connecting rod to act on the lower toggle mechanism to enable the lower toggle mechanism to move up and down while swinging in a reciprocating mode. In the toggle type structure, the eccentric wheel rotates to drive the connecting rod to reciprocate back and forth, thereby driving the upper toggle mechanism and the lower toggle mechanism to reciprocate telescopically. Wherein the eccentric wheel may be an eccentric gear.

Further, the cam toggle type structure comprises a driving part, a rotating shaft and a rotating wheel, wherein the driving part can be a motor, the rotating wheel can be a gear, the driving part is provided with a driving end capable of outputting rotating power, the rotating wheel is arranged on the driving end of the driving part through the rotating shaft, and the eccentric wheel is meshed with the rotating wheel. In the toggle structure, the driving member drives the rotating wheel to rotate, thereby driving the eccentric wheel to rotate.

Furthermore, the upper toggle mechanism comprises an upper toggle, an upper toggle shaft and a middle toggle shaft, the upper toggle is connected with the connecting rod through the middle toggle shaft, and the lower toggle mechanism is also arranged on the middle toggle shaft; the connecting rod is provided with a mounting through hole for the middle toggle shaft to pass through, and the middle toggle shaft passes through the mounting through hole and is connected with the connecting rod; the toggle joint type structure also comprises a rack, an upper toggle joint is arranged on the rack through an upper toggle joint shaft, the upper toggle joint shaft and the middle toggle joint shaft are arranged in parallel, and the upper toggle joint shaft is positioned at the top of the middle toggle joint shaft; the connecting rod pushes the middle toggle shaft to move along an arc-shaped track, and drives the upper toggle to swing by taking the upper toggle shaft as a fulcrum.

Furthermore, a machine case is arranged on the machine frame, an opening for allowing the connecting rod to extend out or retract is formed in the machine case, and the eccentric wheel, the rotating shaft and the rotating wheel are all arranged in the machine case.

The case can be arranged on one side of the upper toggle mechanism side by side, the eccentric wheel, the rotating shaft and the rotating wheel are all arranged in the case, the compactness of the structure can be improved, the eccentric wheel and the rotating wheel can be conveniently lubricated, and meanwhile, the noise of the eccentric wheel, the rotating shaft and the rotating wheel during working can be reduced due to the fact that the case has a certain sound insulation effect.

Further, in order to facilitate the mounting of the upper toggle shaft, the upper toggle is provided with a first mounting hole for mounting the upper toggle shaft.

Further, in order to improve the structure compactness and facilitate the installation of the middle toggle shaft, the upper toggle comprises a first installation part, a second installation part and a third installation part, a first installation hole is formed in the first installation part, and the first installation hole penetrates through the top and the bottom of the first installation part; the second mounting part and the third mounting part are fixedly mounted on the side wall of the first mounting part and are positioned below the first mounting part; the second mounting portion and the third mounting portion are parallel, and two ends of the middle toggle shaft are respectively mounted on the second mounting portion and the third mounting portion.

Further, the lower toggle mechanism comprises a first lower toggle, a second lower toggle and a lower toggle shaft, wherein the first lower toggle and the second lower toggle are movably mounted on the middle toggle shaft, two ends of the lower toggle shaft are respectively mounted on the first lower toggle and the second lower toggle, two ends of the lower toggle shaft respectively extend out of the first lower toggle and the second lower toggle and are mounted on two inner side walls of the sliding piece, and the lower toggle shaft is parallel to the middle toggle shaft.

When the connecting rod moves forwards, the middle toggle shaft is pushed to move along an arc-shaped track and move downwards at the bottom of the upper toggle, and when the first lower toggle and the second lower toggle synchronously swing forwards, the lower toggle shaft moves downwards linearly along the direction vertical to the front-back movement direction of the connecting rod, so that the sliding piece is driven to move downwards; when the connecting rod moves backwards, the middle toggle shaft is pulled to move backwards along an arc-shaped track and move upwards at the bottom of the upper toggle to be matched with the upper toggle, and the lower toggle shaft moves linearly upwards along the direction vertical to the forward and backward movement of the connecting rod while the first lower toggle and the second lower toggle synchronously swing backwards, so that the sliding piece is driven to move upwards.

Further, the first lower toggle comprises a first connecting part and a second connecting part, the first connecting part and the second connecting part are fixedly connected, the first connecting part is located at the top of the second connecting part, the first connecting part is installed on the middle toggle shaft, and the second connecting part is installed on the lower toggle shaft.

Wherein the first lower toggle and the second lower toggle are of the same construction.

Furthermore, in order to improve the motion stability of the sliding part, a sliding rail is arranged on the rack, the sliding part is movably connected to the sliding rail, and the sliding part can move on the sliding rail.

Compared with the prior art, the embodiment of the utility model provides a cam toggle formula structure mainly has following beneficial effect:

the cam toggle type structure is simple in structure, and manufacturing procedures can be saved during manufacturing by arranging the cam mechanism, the upper toggle mechanism, the lower toggle mechanism and the sliding piece, so that the manufacturing cost is reduced; the cam mechanism has an output end capable of reciprocating, and the upper toggle mechanism and the lower toggle mechanism are both arranged on the output end of the cam mechanism, so that the output end of the cam mechanism can push the upper toggle mechanism and the lower toggle mechanism forwards at the same time, and can pull the upper toggle mechanism and the lower toggle mechanism backwards and forwards at the same time. When the cam mechanism pushes the upper toggle mechanism and the lower toggle mechanism forwards, the upper toggle mechanism swings forwards and cooperates with the cam mechanism at the same time of swinging to enable the lower toggle mechanism to move downwards when swinging, so that the sliding piece is driven to move downwards to drive the sliding piece. In addition, the upper toggle mechanism is matched in the process that the cam mechanism pushes the lower toggle mechanism to swing, so that the motion stability of the lower toggle mechanism in the process of swinging and downwards moving can be improved, and the operation stability of the cam toggle type structure is further improved.

Drawings

In order to illustrate the solution of the present invention more clearly, the drawings needed for describing the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. Wherein:

fig. 1 is a schematic diagram of a cam toggle arrangement according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

fig. 3 is a schematic diagram illustrating the effect of the slider moving to the bottom dead center in the cam toggle type structure according to an embodiment of the present invention.

Fig. 4 is a schematic diagram illustrating the effect of the slider moving to the top dead center in the cam toggle type structure according to an embodiment of the present invention;

FIG. 5 is a schematic representation of the upper wrist of FIG. 1;

FIG. 6 is an angular configuration of the first lower toggle of FIG. 1;

FIG. 7 is another angular configuration of the first lower toggle of FIG. 1;

the reference numbers in the drawings are as follows:

1. a cam mechanism; 11. a connecting rod; 12. an eccentric wheel;

2. an upper toggle mechanism; 21. an upper toggle joint; 211. a first mounting portion; 212. a second mounting portion; 213. a third mounting portion; 214. a bump; 215. a first arc-shaped slot; 22. an upper toggle shaft; 23. a middle toggle shaft;

3. a lower toggle mechanism; 31. a first lower toggle; 311. a first connection portion; 312. a second connecting portion; 313. A second arc-shaped slot; 32. a second lower toggle; 33. a lower toggle shaft;

4. a slider; 5. a drive member; 6. a rotating shaft; 7. a rotating wheel; 8. a frame; 81. a chassis; 82. opening a hole; 83. a slide rail;

01. a first mounting hole; 02. a second mounting hole; 03. and a third mounting hole.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, for example, the terms "length," "width," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or position illustrated in the drawings, which are for convenience of description only and are not to be construed as limiting of the present disclosure.

The terms "comprising" and "having" and any variations thereof in the description of the invention are intended to cover non-exclusive inclusions; the terms "first", "second", and the like in the description of the present invention are used for distinguishing different objects, not for describing a specific order.

In the description of the present invention, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The embodiment of the utility model provides a cam toggle type structure, as shown in fig. 1, the cam toggle type structure comprises a cam mechanism 1, an upper toggle mechanism 2, a lower toggle mechanism 3 and a sliding piece 4; the cam mechanism 1 is provided with an output end capable of reciprocating, the upper toggle mechanism 2 and the lower toggle mechanism 3 are both arranged on the output end of the cam mechanism 1, the upper toggle mechanism 2 swings in a reciprocating way under the action of the cam mechanism 1, and the upper toggle mechanism 2 is matched with the cam mechanism 1 to act on the lower toggle mechanism 3 so as to enable the lower toggle mechanism 3 to move up and down while swinging in a reciprocating way; the sliding piece 4 is arranged on the lower toggle mechanism 3 and moves up and down under the driving of the lower toggle mechanism 3.

In the utility model, the cam toggle structure comprises a cam mechanism 1, an upper toggle mechanism 2, a lower toggle mechanism 3 and a sliding piece 4, the structure is simple, the manufacturing process can be saved during manufacturing, and the manufacturing cost is reduced; in the toggle type structure, the cam mechanism 1 is provided with an output end capable of reciprocating, the upper toggle mechanism 2 and the lower toggle mechanism 3 are both arranged on the output end of the cam mechanism 1, one side of the output end of the cam mechanism 1 close to the upper toggle mechanism 2 is taken as a front part, and the output end of the cam mechanism 1 can push the upper toggle mechanism 2 and the lower toggle mechanism 3 forwards and simultaneously or pull the upper toggle mechanism 2 and the lower toggle mechanism 3 forwards and backwards and simultaneously; the upper toggle mechanism 2 is reciprocated under the action of the cam mechanism 1, the swinging track can be an arc track, the upper toggle mechanism 2 is cooperated with the cam mechanism 1 to act on the lower toggle mechanism 3 to enable the lower toggle mechanism 3 to reciprocate and move up and down, understandably, when the cam mechanism 1 pushes the upper toggle mechanism 2 and the lower toggle mechanism 3 forwards, the upper toggle mechanism 2 swings forwards and is cooperated with the cam mechanism 1 to enable the lower toggle mechanism 3 to move downwards during swinging, thereby driving the sliding piece 4 to move downwards, and realizing the driving of the sliding piece 4. In addition, during the process that the cam mechanism 1 pushes the lower toggle mechanism 3 to swing, the cooperation of the upper toggle mechanism 2 can improve the motion stability of the lower toggle mechanism 3 during the process of swinging and downward moving, thereby improving the operation stability of the cam toggle type structure.

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

In one embodiment, as shown in fig. 1, 3 and 4, the cam mechanism 1 comprises a connecting rod 11 and a rotatable eccentric 12, the connecting rod 11 is mounted on the eccentric 12, and the connecting rod 11 reciprocates back and forth under the action of the eccentric 12; the upper toggle mechanism 2 and the lower toggle mechanism 3 are both provided on the link 11, the upper toggle mechanism 2 is reciprocated by the link 11, and the upper toggle mechanism 2 is operated on the lower toggle mechanism 3 in cooperation with the link 11 to move the lower toggle mechanism 3 up and down while reciprocating. In this toggle type structure, the eccentric 12 rotates to reciprocate the connecting rod 11 back and forth, thereby telescopically reciprocating the upper toggle mechanism 2 and the lower toggle mechanism 3. Wherein the eccentric 12 may be an eccentric gear.

In one embodiment, as shown in fig. 1, 3 and 4, the cam toggle structure includes a driving member 5, a rotating shaft 6 and a rotating wheel 7, the driving member 5 may be a motor, the rotating wheel 7 may be a gear, the driving member 5 has a driving end capable of outputting a rotational power, the rotating wheel 7 is disposed on the driving end of the driving member 5 through the rotating shaft 6, and an eccentric 12 is engaged with the rotating wheel 7. In this toggle-type construction, the drive element 5 rotates the rotary wheel 7 and thus the eccentric wheel 12.

Specifically, a first sprocket (not shown) may be mounted on the driving member 5, a second sprocket (not shown) is disposed below the first sprocket, the first sprocket and the second sprocket are connected by a chain (not shown), and the rotating shaft 6 is fixedly mounted at the center of the second sprocket and rotates coaxially with the second sprocket, so that the driving member 5 drives, and the driving force of the driving member is transmitted to the rotating shaft 6 under the transmission of the first sprocket, the second sprocket and the chain, so that the rotating shaft 6 rotates, and the rotation of the rotating wheel 7 is realized.

In one embodiment, as shown in fig. 2 to 4, upper toggle mechanism 2 includes upper toggle 21, upper toggle shaft 22 and middle toggle shaft 23, upper toggle 21 is connected to link 11 by middle toggle shaft 23, and lower toggle mechanism 3 is also mounted on middle toggle shaft 23; a mounting through hole (not shown) for the middle toggle shaft 23 to pass through is formed in the connecting rod 11, and the middle toggle shaft 23 passes through the mounting through hole and is connected with the connecting rod 11;

the toggle structure further comprises a frame 8, an upper toggle 21 is mounted on the frame 8 through an upper toggle shaft 22, the upper toggle shaft 22 and a middle toggle shaft 23 are arranged in parallel, and the upper toggle shaft 22 is positioned on the top of the middle toggle shaft 23; the connecting rod 11 pushes the middle toggle shaft 23 to move along an arc-shaped track, and drives the upper toggle 21 to swing by taking the upper toggle shaft 22 as a fulcrum.

In one embodiment, the frame 8 is provided with a housing 81, the housing 81 is provided with an opening 82 for allowing the connecting rod 11 to extend or retract, and the eccentric wheel 12, the rotating shaft 6 and the rotating wheel 7 are all installed in the housing 81.

The case 81 can be arranged side by side on one side of the upper toggle mechanism 2, a movable door (not shown) which can be opened and closed can be arranged on the case 81, the eccentric wheel 12, the rotating shaft 6 and the rotating wheel 7 are all arranged in the case 81, the structure compactness can be improved, the eccentric wheel 12 and the rotating wheel 7 can be conveniently lubricated, and meanwhile, the case 81 has certain sound insulation effect, and the noise of the eccentric wheel 12, the rotating shaft 6 and the rotating wheel 7 in working can be reduced.

In one embodiment, as shown in fig. 5, to facilitate the mounting of the upper toggle shaft 22, the upper toggle 21 is provided with a first mounting hole 01 for mounting the upper toggle shaft.

In one embodiment, as shown in fig. 2 and 5, to improve the compactness and facilitate the installation of the middle toggle shaft 23, the upper toggle 21 includes a first installation part 211, a second installation part 212 and a third installation part 213, a first installation hole 01 is opened on the first installation part 211, and the first installation hole 01 penetrates the top and bottom of the first installation part 211; the second mounting part 212 and the third mounting part 213 are fixedly mounted on the side wall of the first mounting part 211, and the second mounting part 212 and the third mounting part 213 are positioned below the first mounting part 211; the second mounting portion 212 and the third mounting portion 213 are parallel to each other, and both ends of the middle toggle shaft 23 are mounted on the second mounting portion 212 and the third mounting portion 213, respectively.

Specifically, the second mounting portion 212 is formed with a second mounting hole 02, the third mounting portion 213 is formed with a third mounting hole 03, and both ends of the middle toggle shaft 23 are respectively mounted in the second mounting hole 02 and the third mounting hole 03.

In one embodiment, as shown in fig. 2 to 5, the lower toggle mechanism 3 includes a first lower toggle 31, a second lower toggle 32 and a lower toggle shaft 33, the first lower toggle 31 and the second lower toggle 32 are movably mounted on the middle toggle shaft 23, two ends of the lower toggle shaft 33 are respectively mounted on the first lower toggle 31 and the second lower toggle 32, and two ends of the lower toggle shaft 33 respectively extend from the first lower toggle 31 and the second lower toggle 32 and are mounted on two inner side walls of the slider 4; in which both sides of the slider 4 are formed with first through holes (not shown) for allowing the lower toggle shafts 33 to pass therethrough, the lower toggle shafts 33 are parallel to the middle toggle shaft 23, the first lower toggle 31 is located inside the second mounting portion 212, and the second lower toggle 32 is located inside the third mounting portion 213.

When the connecting rod 11 moves forwards, the middle toggle shaft 23 is pushed to move along an arc-shaped track and move downwards at the bottom of the upper toggle 21 in a matching manner, the first lower toggle 31 and the second lower toggle 32 synchronously swing forwards, and simultaneously, the lower toggle shaft 33 moves downwards linearly along a direction vertical to the front-back movement direction of the connecting rod 11, so that the sliding piece 4 is driven to move downwards; when the link 11 moves backward, the middle toggle shaft 23 is pulled to move back along an arc-shaped trajectory and move up and down at the bottom of the upper toggle 21, and the lower toggle shaft 33 moves linearly in a direction perpendicular to the forward and backward movement of the link 11 while the first lower toggle 31 and the second lower toggle 32 synchronously swing backward, thereby moving the slider 4 upward.

In one embodiment, as shown in fig. 2, 6 and 7, the first lower toggle 31 includes a first connecting portion 311 and a second connecting portion 312, the first connecting portion 311 and the second connecting portion 312 are fixedly connected, the first connecting portion 311 is located at the top of the second connecting portion 312, the first connecting portion 311 is mounted on the middle toggle shaft 23, and the second connecting portion 312 is mounted on the lower toggle shaft 33.

The first connecting portion 311 is located on the inner side of the second mounting portion 212, a protrusion 214 is further extended from the outer side wall of the first mounting portion 211, a first arc-shaped groove 215 is formed at the bottom of the protrusion 214, a second arc-shaped groove 313 is formed at the top of the second connecting portion 312, and the first arc-shaped groove 215 and the second arc-shaped groove 313 form a space for accommodating the middle toggle shaft 23.

Wherein the first lower toggle 31 and the second lower toggle 32 are of the same construction.

In one embodiment, as shown in fig. 3, in order to improve the motion stability of the sliding member 4, a sliding rail 83 is disposed on the frame 8, the sliding member 4 is movably connected to the sliding rail 83, and the sliding member 4 can move on the sliding rail 83.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A cam toggle type structure is characterized by comprising a cam mechanism, an upper toggle mechanism, a lower toggle mechanism and a sliding piece; the cam mechanism is provided with an output end capable of reciprocating, the upper toggle mechanism and the lower toggle mechanism are both arranged on the output end of the cam mechanism, the upper toggle mechanism swings in a reciprocating manner under the action of the cam mechanism, and the upper toggle mechanism is matched with the cam mechanism to act on the lower toggle mechanism, so that the lower toggle mechanism moves up and down while swinging in a reciprocating manner; the sliding piece is arranged on the lower toggle mechanism and driven by the lower toggle mechanism to move up and down.

2. The cam toggle construction of claim 1, wherein the cam mechanism includes a connecting rod and a rotatable eccentric, the connecting rod being mounted on the eccentric and under the action of the eccentric the connecting rod reciprocates; the upper toggle mechanism and the lower toggle mechanism are arranged on the connecting rod, the upper toggle mechanism swings in a reciprocating mode under the action of the connecting rod, and the upper toggle mechanism is matched with the connecting rod to act on the lower toggle mechanism to enable the lower toggle mechanism to move up and down while swinging in a reciprocating mode.

3. The cam toggle structure according to claim 2, further comprising a driving member having a driving end through which the rotational power is outputted, a rotational shaft, and a rotational wheel provided on the driving end of the driving member through the rotational shaft, wherein the eccentric wheel and the rotational wheel are engaged.

4. The cam-toggle construction of claim 2, wherein the upper toggle mechanism comprises an upper toggle, an upper toggle shaft and a middle toggle shaft, the upper toggle being connected by the middle toggle shaft and a link, the lower toggle mechanism being mounted on the middle toggle shaft;

the toggle joint type structure also comprises a rack, wherein the upper toggle joint is arranged on the rack through an upper toggle joint shaft, the upper toggle joint shaft and the middle toggle joint shaft are arranged in parallel, and the upper toggle joint shaft is positioned at the top of the middle toggle joint shaft; the connecting rod pushes the middle toggle shaft to move along an arc-shaped track, and drives the upper toggle to swing by taking the upper toggle shaft as a fulcrum.

5. The cam toggle structure according to claim 4, wherein the frame is provided with a case, the case is provided with an opening for allowing the connecting rod to extend or retract, and the eccentric wheel, the rotary shaft and the rotary wheel are installed in the case.

6. The cam-toggle construction according to claim 4, wherein the frame is provided with a slide track, and the slider is movably connected to the slide track.

7. The cam-toggle construction according to claim 4, wherein the upper toggle has a first mounting hole formed therein for mounting an upper toggle shaft.

8. The cam toggle arrangement of claim 7, wherein the upper toggle includes a first mounting portion, a second mounting portion, and a third mounting portion, the first mounting hole opening in the first mounting portion and the first mounting hole passing through a top and a bottom of the first mounting portion; the second mounting part and the third mounting part are fixedly mounted on the side wall of the first mounting part and are positioned below the first mounting part; the second installation portion is parallel to the third installation portion, and two ends of the middle toggle shaft are respectively installed on the second installation portion and the third installation portion.

9. The cam-toggle structure according to claim 4, wherein the lower toggle mechanism comprises a first lower toggle, a second lower toggle, and a lower toggle shaft, the first lower toggle and the second lower toggle are movably mounted on the middle toggle shaft, both ends of the lower toggle shaft are respectively mounted on the first lower toggle and the second lower toggle, and both ends of the lower toggle shaft respectively extend from the first lower toggle and the second lower toggle and are mounted on both inner side walls of the slider; the lower wrist axis is parallel to the middle wrist axis.

10. The cam toggle construction of claim 9, wherein the first lower toggle comprises a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion being fixedly connected, the first connecting portion being located at a top of the second connecting portion, the first connecting portion being mounted on the middle toggle shaft, the second connecting portion being mounted on the lower toggle shaft.

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