CN211806580U

CN211806580U - Linkage cutting die frame of positive and negative pressure plastic suction forming machine

Info

Publication number: CN211806580U
Application number: CN201922368533.6U
Authority: CN
Inventors: 陈英武
Original assignee: Shanghai Zhanshi Mechanical Equipment Co ltd
Current assignee: Shanghai Zhanshi Mechanical Equipment Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-10-30
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a positive negative pressure plastic uptake make-up machine linkage cuts die carrier, positive negative pressure plastic uptake make-up machine linkage cuts the die carrier and includes installing support, last mould mount pad, lower mould mount pad and base, it sets up on the installing support respectively to go up mould mount pad, lower mould mount pad and base, positive negative pressure plastic uptake make-up machine linkage cuts the die carrier and still includes linkage structure and driving motor, driving motor passes through linkage structure can drive simultaneously go up the mould mount pad with the lower mould mount pad is in carry out the removal of vertical direction on the installing support, and the moving direction of going up mould mount pad and lower mould mount pad is opposite. The utility model discloses only need set up a driving motor, reduced the energy consumption to overall structure is also very simple, the cost is reduced.

Description

Linkage cutting die frame of positive and negative pressure plastic suction forming machine

Technical Field

The utility model relates to a cut the die carrier, concretely relates to positive negative pressure plastic uptake make-up machine linkage and cut the die carrier.

Background

Referring to fig. 1, a linkage cutting die carrier of a conventional positive and negative pressure plastic suction forming machine generally includes a mounting bracket 110, an upper die mounting seat 120 and a lower die mounting seat 130, the upper die mounting seat 120 is used for mounting an upper die of a cutting die, the lower die mounting seat 130 is used for mounting a lower die of the cutting die, a driving structure 140 is respectively disposed at the bottom end and the top end of the mounting bracket 110, the driving structure 140 disposed at the top end drives the upper die mounting seat 120 to move up and down on the mounting bracket 110, and the driving structure 140 disposed at the bottom end drives the lower die mounting seat 130 to move up and down on the mounting bracket 110.

The structure needs to be provided with two driving structures, so that the energy consumption is high, the structure is complex, and the cost is very high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned problem to a positive negative pressure plastic uptake make-up machine linkage cutting die carrier is provided.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a positive negative pressure plastic uptake make-up machine linkage cutting die carrier, positive negative pressure plastic uptake make-up machine linkage cutting die carrier includes installing support, last mould mount pad, lower mould mount pad and base set up respectively on the installing support, positive negative pressure plastic uptake make-up machine linkage cutting die carrier still includes linkage structure and driving motor, driving motor passes through linkage structure can drive simultaneously go up the mould mount pad with the lower mould mount pad is in carry out the removal of vertical direction on the installing support, and the moving direction of going up mould mount pad and lower mould mount pad is opposite.

By adopting the technical scheme, only one driving mechanism is needed to be arranged, and energy consumption and cost are reduced.

In a preferred embodiment of the present invention, the mounting bracket includes four identical support rods distributed in a matrix.

Through adopting above-mentioned technical scheme for the structure of installing support is simpler.

In the utility model discloses a preferred embodiment, the top at four bracing pieces is fixed to the last die holding seat, the bottom at four bracing pieces is fixed to the base, the base is connected with linkage structure, linkage structure can drive the base and carry out the removal of vertical direction.

Through adopting above-mentioned technical scheme for linkage structure does not need directly to be connected with last die holding seat when driving the last die holding seat and removes, and the accessible is connected with the base, drives the removal of last die holding seat, makes driving motor not install the top at installing support like this.

In a preferred embodiment of the present invention, the lower die mounting seat is located between the upper die mounting seat and the base, four first through holes are provided on the lower die mounting seat, each first through hole is penetrated by a support rod, the lower die mounting seat is connected to the linkage structure, and the linkage structure can drive the lower die mounting seat to move in the vertical direction along the support rod.

Through adopting above-mentioned technical scheme for the lower mould mount pad does not remove along with the base together, removes through linkage structure individual drive, guarantees like this that lower mould mount pad and last mould mount pad are opposite when removing.

The utility model discloses a preferred embodiment, positive negative pressure plastic uptake forming machine linkage cutting die carrier still includes a mount pad, be equipped with four second through-holes on the mount pad, every second through-hole is passed by a bracing piece, the mount pad is located between lower mould mount pad and the base, linkage structure sets up on the mount pad.

Through adopting above-mentioned technical scheme for the position that corresponds is installed to installing support accessible mount pad, and be convenient for reciprocating of base, because base on the installing support can reciprocate through linkage structure, so the base needs contactless with ground sometimes, and if directly place the base subaerial, make linkage structure can't realize driving the base like this and remove, and through the mount pad, can make the base unsettled at the mounted position that corresponds, the removal of the base of being convenient for.

In addition, through the arrangement of the mounting seat, the linkage structure is also integrally arranged with the mounting bracket, so that the linkage structure is conveniently connected with the base and the lower die mounting seat, and the connection distance is reduced.

In a preferred embodiment of the present invention, the linkage structure includes one or two swing assemblies, and the driving motor is a one-way gear reducer or a two-way gear reducer.

In a preferred embodiment of the present invention, the swing assembly includes:

at least one first rotating shaft assembly arranged on the lower surface of the lower die mounting seat;

at least one first link rotatably connected at one end to a first pivot assembly;

a connecting member to which the other end of each first link is rotatably connected;

one end of the eccentric wheel connecting rod is connected with the driving motor, and the other end of the eccentric wheel connecting rod is connected with the connecting assembly;

at least one second link, one end of each second link rotatably connected with the connection assembly;

at least one second rotary shaft assembly, each second rotary shaft assembly rotatably connected to the other end of one second connecting rod;

at least one third connecting rod, one end of each third connecting rod is rotatably connected with one second rotating shaft component;

and at least one third rotating shaft assembly, wherein the third rotating shaft assembly is arranged on the upper surface of the base, and each third rotating shaft assembly is rotatably connected with the other section of one third connecting rod.

Through adopting above-mentioned technical scheme for the swing subassembly can drive the base and remove, can drive the lower mould mount pad removal again, and when still guaranteeing base and lower mould mount pad removal, opposite direction.

In a preferred embodiment of the present invention, the first and third rotating shaft assemblies have the same structure, and both include an installation block detachably fixed on the upper surface of the base or the lower surface of the lower die mounting seat by screws, the installation block is vertically provided with two symmetrical mounting plates, a first connecting post is arranged between the two mounting plates, and one end of the first connecting rod or the third connecting rod is rotatably disposed on the first connecting post; the second rotating shaft assembly comprises a second connecting column, the structure of the second connecting column is the same as that of the first connecting column, the second connecting rod is rotatably arranged at one end of the second connecting column, and the third connecting rod is rotatably arranged at the other end of the second connecting column; the first connecting rod and the third connecting rod are identical in structure, and first connecting holes are formed in the two ends of the first connecting rod and are in matched connection with the first connecting column or the second connecting column; the connecting assembly comprises two symmetrical connecting plates, at least one third connecting column is arranged between the two connecting plates, each third connecting column is connected with one first connecting rod and one second connecting rod in a matched mode, and the eccentric wheel connecting rod is connected with one of the third connecting columns.

Through adopting above-mentioned technical scheme for swing assembly's structure is very simple, and the manufacturing of being convenient for has reduced the cost.

In a preferred embodiment of the present invention, a supporting frame is disposed on the mounting seat, at least one fourth connecting column is disposed on the supporting frame, second connecting holes are disposed at two ends of the second connecting rod respectively, the second connecting holes are connected with the third connecting column or the second connecting column in a matching manner, a third connecting hole is disposed at a middle portion of the second connecting rod, the third connecting hole is connected with the fourth connecting column in a matching manner, and the second connecting rod can rotate on the fourth connecting column.

Through adopting above-mentioned technical scheme, can improve swing assembly's support intensity.

In a preferred embodiment of the present invention, a mounting seat is provided with a placement groove, and the driving motor is directly disposed in the placement groove.

By adopting the technical scheme, the driving motor and the linkage structure are integrated, so that the driving motor and the linkage structure are convenient to connect.

The utility model has the advantages that:

the utility model discloses only need set up a driving motor, reduced the energy consumption to overall structure is also very simple, the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a linked cutting mold frame of a conventional positive and negative pressure plastic suction forming machine;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic structural view of a linkage structure;

fig. 4 is a schematic structural diagram of the mounting seat.

Reference numerals: 110. mounting a bracket; 120. an upper die mounting seat; 130. a lower die mounting seat; 140. a drive structure; 200. mounting a bracket; 300. an upper die mounting seat; 400. a lower die mounting seat; 500. a base; 610. a first rotating shaft assembly; 611. mounting blocks; 612. mounting a plate; 613. a first connecting column; 620. a first link; 630. a connecting assembly; 631. a connecting plate; 632. a third connecting column; 640. an eccentric wheel connecting rod; 650. a second link; 660. a second spindle assembly; 670. a third link; 680. a third spindle assembly; 700. a drive motor; 800. a mounting seat; 810. a placing groove; 820. a support frame; 821. a fourth connecting column; 830. a rectangular through hole.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further explained below.

Referring to fig. 2, the utility model provides a positive negative pressure plastic uptake make-up machine linkage cutting die carrier, it includes installing support 200, goes up mould mount pad 300, lower mould mount pad 400, base 500, linkage structure and driving motor 700.

The mounting bracket 200 is used for mounting the upper die mounting base 300, the lower die mounting base 400 and the base 500, only comprises four same supporting rods distributed in a matrix, and has a very simple structure.

And the upper die mounting base 300 is fixed at the top ends of the four support rods, is used for mounting an upper die of the cutting die and drives the upper die to move in the vertical direction.

And a base 500 fixed at the bottom ends of the four support rods and not in contact with the ground, and connected with a linkage structure which can drive the base to move in the vertical direction.

Since the base 500 and the upper die mounting base 300 are fixed on the four support rods, when the linkage structure drives the base 500 to move in the vertical direction, the base 500 can also drive the upper die mounting base 300 to move together through the four support rods.

This application slides on the bracing piece for among the prior art through drive structure drive upper die mount pad 300, has changed upper die mount pad 300's removal mode completely, through with base 500, bracing piece and upper die mount pad 300 are fixed as an organic whole, then remove through driving base 500 and drive upper die mount pad 300 and remove, avoided linkage structure and upper die mount pad 300 to be connected like this, the linkage structure of being convenient for also drives upper die mount pad 300 and removes under the condition of not being connected with upper die mount pad 300.

In addition, the linkage structure and the driving motor 700 are prevented from being arranged above the mounting bracket 200, and the mounting range of the linkage structure is enlarged.

The lower die mounting base 400 is located between the upper die mounting base 300 and the base 500 and is connected with the linkage structure, four end portions of the lower die mounting base 400 are respectively provided with a first through hole, each first through hole is penetrated by a support rod, and the linkage structure can drive the lower die mounting base 400 to move on the support rods.

Therefore, the lower die mounting seat 400 does not move together with the base 500 and can be driven to move independently through the linkage structure, so that the moving direction of the lower die mounting seat 400 is opposite to that of the upper die mounting seat 300, and die assembly and die separation are realized.

In addition, when the linkage structure drives the lower die mounting base 400 to move along the supporting rod, the linkage structure does not influence the movement of the base 500.

The linkage structure is respectively connected with the lower die mounting seat 400, the base 500 and the driving motor 700, and is driven by the driving motor 700, so that the lower die mounting seat 400 and the base 500 can be driven to move in the vertical direction at the same time, and the moving directions of the lower die mounting seat 400 and the base 500 are opposite.

The linkage structure specifically includes one or two swing assemblies, and the driving motor 700 may be a one-way gear reducer or a two-way gear reducer.

The number of the swing assemblies and the type of the driving motor 700 can be determined according to actual requirements, when the lower die mounting base 400 and the base 500 are heavy, two swing assemblies and a bidirectional gear reducer can be adopted, the two swing assemblies are driven to swing through the bidirectional gear reducer, and when the lower die mounting base 400 and the base 500 are light, one swing assembly and a one-way gear reducer can be adopted, and the swing assemblies are driven to swing through the one-way gear reducer.

In this embodiment, the linkage structure specifically employs two swing assemblies, and the driving motor 700 is a bidirectional gear reducer, which can improve stability.

Referring to fig. 3, the swing assembly includes at least one first rotation shaft assembly 610, at least one first connecting rod 620, one connecting assembly 630, an eccentric connecting rod 640, at least one second connecting rod 650, at least one second rotation shaft assembly 660, at least one third connecting rod 670, and at least one third rotation shaft assembly 680.

The number of the first rotating shaft assembly 610, the first connecting rod 620, the second connecting rod 650, the second rotating shaft assembly 660, the third connecting rod 670 and the third rotating shaft assembly 680 is determined according to the weight of the lower die mounting seat 400 and the base 500, in the embodiment, the number of the first rotating shaft assembly 610, the first connecting rod 620, the second rotating shaft assembly 660, the third connecting rod 670 and the third rotating shaft assembly 680 is 2, the number of the second connecting rods 650 is 4, the second connecting rods 650 play a role in connecting the base 500 and the lower die mounting seat 400, the requirement on the strength of the whole is high, and therefore the number of the second connecting rods 650 is doubled, which is beneficial to improving the strength.

Two first shaft assemblies 610 are respectively installed at the lower surface of the lower die mounting base 400, and each first shaft assembly 610 is connected with one first link 620.

The first shaft assembly 610 includes a mounting block 611, and the mounting block 611 is detachably fixed on the lower surface of the lower mold mounting base by screws, so that the linkage structure and the lower mold mounting base 400 are detachably connected, and are convenient to detach and replace.

Two symmetrical mounting plates 612 are vertically arranged on the mounting block 611, a first connecting column 613 is arranged between the two mounting plates 612, and one end of the first connecting rod 620 is sleeved on the first connecting column 613 and can rotate on the first connecting column 613.

The first link 620, which is a two-hole link, has two ends respectively provided with a first connection hole, the first connection hole of one end is sleeved on the first connection post 613, and the other end is sleeved on the connection assembly 630, so that both ends of the first link 620 are rotatable.

The connecting assembly 630, which is a middle connecting pivot, is used to connect the two first connecting rods 620, the eccentric connecting rod 640 and the four second connecting rods 650 into a whole, and includes two symmetrical connecting plates 631, two third connecting columns 632 are disposed between the two connecting plates 631, each third connecting column 632 is connected with one first connecting rod 620 and two second connecting rods 650, and the eccentric connecting rod 640 is connected with the third connecting column 632 near one side thereof, so that when the eccentric connecting rod 640 is driven to swing, the first connecting rod 620 and the second connecting rod 650 can be driven to rotate by the connecting assembly 630.

And a second connecting rod 650 for connecting the base 500 and the lower mold mounting base 400, which is a three-hole connecting rod, wherein two ends of the connecting rod are respectively provided with a second connecting hole, the middle of the connecting rod is provided with a third connecting hole, the second connecting hole at one end is sleeved on the third connecting post 632 and can rotate on the third connecting post 632, and the second connecting hole at the other end is sleeved on the second rotating shaft assembly 660 and can rotate on the second rotating shaft assembly 660.

A second rotation shaft assembly 660 for connection between the second and

third links

650 and 670 and ensuring that both the second and

third links

650 and 670 can rotate thereon.

The second rotating shaft component 660 is specifically a second connecting column, the second connecting column has the same structure as the first connecting column 613, and the second connecting hole of the second connecting rod 650 can be sleeved on the second connecting column and can rotate.

The third connecting rod 670, which has the same structure as the first connecting rod 620, is also a two-hole connecting rod, two ends of which are respectively provided with a first connecting hole, the first connecting hole at one end is sleeved on the second connecting column, and the first connecting hole at the other end is connected with the third rotating shaft assembly 680.

Two third rotation shaft assemblies 680 are respectively installed at the upper surface of the base 500, and each third rotation shaft assembly 680 is connected to one third link 670.

The structure of the third rotating shaft assembly 680 is the same as that of the first rotating shaft assembly 610, and therefore, the structure is not described in detail, so as to achieve the detachable installation of the linkage structure and the base 500 and ensure that the third connecting rod 670 can rotate thereon.

Through the swing subassembly that above-mentioned structure constitutes like this for the swing subassembly can drive base 500 and remove, can drive lower mould mount pad 400 and remove again, and because the swing subassembly is located base 500 and lower mould mount pad 400 centre, the swing subassembly is when the swing like this, and the direction of movement of base 500 and lower mould mount pad 400 is just opposite.

In addition, because the swing assembly can drive the base 500 and the lower die mounting seat 400 to move simultaneously, only one driving motor 700 is needed in the application, and the energy consumption and the cost are reduced.

Furthermore, since the swing assembly is composed of only a few links, the structure is very simple, and the manufacturing is convenient and the manufacturing cost is very low.

Moreover, because the swing assembly is composed of connecting rods and is detachably connected with the connecting rods, no matter how heavy the base 500 and the lower die mounting base 400 are, the corresponding number can be selected according to the lever principle to connect, and the application range of the device is widened.

Because the base 500 on the mounting bracket 100 can move up and down by being driven by the linkage structure, the base 500 sometimes needs to be not in contact with the ground (in a suspended state), and if the base 500 is directly placed on the ground, the linkage structure cannot drive the base 500 to move.

Referring to fig. 2 and 4, the present application further includes a mounting seat 800, four second through holes are formed in the mounting seat 800, each second through hole is penetrated by one support rod, and the mounting seat 800 is located between the lower die mounting seat 400 and the base 500, when the present application is installed, the mounting bracket 200 can be placed in a groove body, and the mounting seat 800 can be connected with a side edge of the groove body to form a support point.

Because the mount pad 800 is passed by the bracing piece, and the side contact of mount pad 800 and cell body, linkage structure can drive base 500 like this and remove for base 500 does not contact with the bottom surface of cell body.

In addition, a placing groove 810 is formed in the mounting seat 800, the driving motor 700 can be arranged in the placing groove 810, and the linkage structure is integrally located between the lower die mounting seat 400 and the base 500, so that the mounting bracket 200 is integrally arranged, components are not required to be mounted outside the mounting bracket 200, and the use convenience is improved.

Since the lower die mounting base 400 and the base 500 are not supported by the mounting bracket 200, they are supported only by the linkage structure, and the linkage structure is very simple, the linkage structure is easily damaged.

Two support frames 820 can be arranged on the mounting seat 800, each support frame 820 is connected with one swing assembly in a matching mode, the linkage structure can be supported through the support frames 820, and part of force borne by the linkage structure is shared on the mounting seat 800.

Two fourth connecting columns 821 are arranged on the supporting frame 820, each fourth connecting column 821 is connected with two second connecting rods 650, and particularly, a third connecting hole in the middle of each second connecting rod 650 is sleeved on each fourth connecting column 821, so that the supporting of the linkage structure can be realized, and the rotation of the second connecting rods 650 is facilitated.

Four rectangular through holes 830 are further formed in the mounting base 800, and each rectangular through hole 830 is located below one fourth connecting column 821, so that the second connecting rod 650 can pass through the rectangular through holes, and the connection between the second connecting rod 650 and the third connecting rod 670 is not affected.

In addition, the positive and negative pressure plastic suction forming machine linkage cutting die frame formed by the structure enables the lower die on the lower die mounting seat 400 and the upper die on the upper die mounting seat 300 not to be blocked easily when the dies are matched due to the action of gravitational potential energy.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a positive negative pressure plastic uptake make-up machine linkage cutting die carrier, positive negative pressure plastic uptake make-up machine linkage cutting die carrier includes installing support (200), goes up mould mount pad (300), lower mould mount pad (400) and base (500), it sets up respectively on installing support (200) to go up mould mount pad (300), lower mould mount pad (400) and base (500), a serial communication port, positive negative pressure plastic uptake make-up machine linkage cutting die carrier still includes linkage structure and driving motor (700), driving motor (700) pass through linkage structure can drive simultaneously go up mould mount pad (300) with lower mould mount pad (400) are in carry out the removal of vertical direction on installing support (200), and the moving direction of going up mould mount pad (300) and lower mould mount pad (400) is opposite.

2. The linked cutting die frame of the positive-negative pressure plastic suction forming machine according to claim 1, wherein the mounting bracket (200) comprises four identical support rods distributed in a matrix.

3. The linked cutting die set of the positive-negative pressure plastic suction forming machine according to claim 2, wherein the upper die mounting base (300) is fixed at the top ends of the four support rods, the base (500) is fixed at the bottom ends of the four support rods, and the base (500) is connected with a linkage structure which can drive the base (500) to move in the vertical direction.

4. The linking cutting die holder of the positive-negative pressure plastic suction forming machine according to claim 3, wherein the lower die mounting seat (400) is located between the upper die mounting seat (300) and the base (500), the lower die mounting seat (400) is provided with four first through holes, each first through hole is penetrated by one support rod, the lower die mounting seat (400) is connected with a linking structure, and the linking structure can drive the lower die mounting seat (400) to move along the support rods in the vertical direction.

5. The linked cutting die frame of the positive-negative pressure plastic suction forming machine according to claim 4, wherein the linked cutting die frame of the positive-negative pressure plastic suction forming machine further comprises a mounting seat (800), four second through holes are formed in the mounting seat (800), each second through hole is penetrated by one support rod, the mounting seat (800) is located between the lower die mounting seat (400) and the base (500), and the linkage structure is arranged on the mounting seat (800).

6. The linking cutting die frame of the positive-negative pressure plastic suction forming machine according to claim 5, wherein the linking structure comprises one or two swinging assemblies, and the driving motor (700) is a one-way gear reducer or a two-way gear reducer.

7. The linked cutting die frame of the positive and negative pressure plastic suction forming machine according to claim 6, wherein the swing assembly comprises:

at least one first rotating shaft assembly (610), wherein the first rotating shaft assembly (610) is arranged on the lower surface of the lower die mounting seat (400);

at least one first link (620), said first link (620) rotatably connected at one end to a first axle assembly (610);

a connecting member (630), the other end of each first link (620) being rotatably connected to the connecting member (630);

one end of the eccentric wheel connecting rod (640) is connected with the driving motor (700), and the other end of the eccentric wheel connecting rod (640) is connected with the connecting component (630);

at least one second link (650), one end of each second link (650) being rotatably connected with the connection assembly (630);

at least one second rotation shaft assembly (660), each second rotation shaft assembly (660) being rotatably connected to the other end of one second link (650);

at least one third link (670), each third link (670) having one end rotatably connected to a second rotary shaft assembly (660);

at least one third rotation shaft assembly (680), the third rotation shaft assembly (680) being disposed on the upper surface of the base (500), each third rotation shaft assembly (680) being rotatably connected with another segment of one third link (670).

8. The linked cutting die frame of positive and negative pressure plastic uptake forming machine according to claim 7,

the first rotating shaft assembly (610) and the third rotating shaft assembly (680) have the same structure and both comprise a mounting block (611), the mounting block (611) is detachably fixed on the upper surface of the base (500) or the lower surface of the lower die mounting seat (400) through a screw, two symmetrical mounting plates (612) are vertically arranged on the mounting block (611), a first connecting column (613) is arranged between the two mounting plates (612), and one end of the first connecting rod (620) or one end of the third connecting rod (670) is rotatably arranged on the first connecting column (613);

the second rotating shaft component (660) comprises a second connecting column (661), the structure of the second connecting column (661) is the same as that of the first connecting column (613), the second connecting rod (650) is rotatably arranged at one end of the second connecting column (661), and the third connecting rod (670) is rotatably arranged at the other end of the second connecting column (661);

the first connecting rod (620) and the third connecting rod (670) have the same structure, and both ends of the first connecting rod and the third connecting rod are respectively provided with a first connecting hole which is matched and connected with the first connecting column (613) or the second connecting column (661);

the connecting assembly (630) comprises two symmetrical connecting plates (631), at least one third connecting column (632) is arranged between the two connecting plates (631), each third connecting column (632) is in fit connection with one first connecting rod (620) and one second connecting rod (650), and the eccentric wheel connecting rod (640) is connected with one of the third connecting columns (632).

9. The linked cutting die holder of the positive and negative pressure plastic suction forming machine according to claim 8, wherein a support frame (820) is arranged on the mounting seat (800), at least one fourth connecting column (821) is arranged on the support frame (820), second connecting holes are respectively arranged at two ends of the second connecting rod (650), the second connecting holes are connected with the third connecting column (632) or the second connecting column (661) in a matched manner, a third connecting hole is arranged at the middle part of the second connecting rod (650), the third connecting hole is connected with the fourth connecting column (821) in a matched manner, and the second connecting rod (650) can rotate on the fourth connecting column (821).

10. The linked cutting die frame of the positive-negative pressure plastic suction forming machine is characterized in that the mounting seat (800) is provided with a placement groove (810), and the driving motor (700) is directly arranged in the placement groove (810).