CN201687906U - Toggle rod pressure transmission mechanism and pressure machine or injection molding machine comprising same - Google Patents

Abstract

A toggle rod pressure transmission mechanism belongs to the field of connecting rod transmission mechanisms, and comprises a toggle rod mechanism, a driving block and a slide block, wherein, the toggle rod mechanism comprises an upper toggle plate, a lower toggle rod and a middle connecting rod, the upper toggle plate is respectively connected with the lower toggle rod, the middle connecting rod and a frame through a toggle rod hinge, a connecting hinge and an upper cross beam hinge, the other end of the lower toggle rod is connected with the slide block through a slide block hinge, and the other end of the middle connecting rod is connected with the driving block through a driving hinge. In each toggle rod mechanism, a line segment connecting the axes of the driving hinge and the axes of the connecting hinge and a straight line passing through the axes of the upper cross beam hinge and the axes of the toggle rod hinge are positioned in the same plane and keep disjointed during the entire operation of the mechanism. Compared with the traditional symmetric six-link mechanism, the utility model has the advantages of good force amplifying performance and lower overall height. The load-bearing shaft of the transmission mechanism is subject to relatively uncomplicated stress and is less vulnerable to fracture. The utility model further relates to a pressure machine or an injection molding machine comprising the toggle rod pressure transmission mechanism.

Description

A toggle pressure transmission mechanism and a press or injection molding machine including the mechanism

technical field

The utility model belongs to a connecting rod transmission mechanism, in particular to a pressure transmission mechanism and a press or an injection molding machine including the mechanism. the

Background technique

Symmetrical six-bar linkage press (product of Amino (Wuhan) High-Tech Co., Ltd.) is a newly popular plastic processing equipment. Compared with other traditional pressure mechanisms, such as the crank-connecting rod transmission type press (see "<Crank Press", He Deyu, Machinery Industry Press, 1987), the crank toggle transmission type press (see "Mechanical Press") Optimal Design of Toggle-Rod Transmission Mechanism", Zhang Yuantong, Zhu Denglin, "Machinery and Electronics", 2008(1), pp. 10-12), hydraulic transmission press (see "Design and Application of Hydraulic Press", Yu Xinlu, Mechanical Industry Press) and screw drive presses (see J58K series CNC electric screw presses of Wuhan Xinweiqi Technology Co., Ltd.) have certain advantages. It is reflected in: 1. The lateral force of the slider is equal to zero under the condition of no partial load, which not only ensures the service life of the guide rail, but also improves the forming accuracy. 2. The force-increasing function of the symmetrical six-bar linkage mechanism is more obvious, which reduces the driving torque of the motor. However, the transmission mechanism of the symmetrical six-bar linkage press has the following problems: 1. The height of the frame is large, which occupies a high space and requires a tall delivery room, thus increasing the construction cost of the plant; 2. The effective boosting stroke is short, causing the mechanism to work Short range. the

The utility model provides a toggle pressure transmission mechanism, the multiplier of force increase and the effective force increase stroke are obviously better than the symmetrical six-bar linkage mechanism; The connecting rod mechanism is low, which is more suitable for small workshops and reduces construction costs; at the same time, when it is symmetrically arranged to form a symmetrical toggle pressure transmission mechanism, there is no lateral force of the slider under the condition of no partial load, eliminating the need for sliders. The side pressure on the guide rail and the wear caused by it ensure the molding quality. the

Utility model content

For realizing the purpose of this utility model, the concrete technical scheme that adopts is:

A toggle pressure transmission mechanism, comprising a slider, a driving source, a drive rod and a toggle mechanism, two toggle mechanisms, symmetrically arranged on both sides of the vertical center line of the toggle pressure transmission mechanism, the toggle The lever mechanism includes an upper toggle plate, a lower toggle link and an intermediate link. The upper toggle plate is respectively connected with one end of the lower toggle link, one end of the intermediate link link and the frame through the toggle hinge, the connecting hinge and the upper beam hinge. The other end of the lower toggle link It is connected to the slider through the slider hinge, and the other end of the intermediate link is connected to the drive block through the drive hinge.

It is characterized in that, in each toggle mechanism, the line segment with the axis of the drive hinge and the axis of the connecting hinge as the end points and the straight line passing through the axis of the hinge of the upper beam and the axis of the toggle hinge are located on the same plane, and in the entire mechanism Always remain disjoint during work. the

Driven by the driving source, the driving block described in the utility model reciprocates horizontally or vertically on the driving rod, thereby driving the toggle mechanism to work. the

In each toggle mechanism of the present utility model, there is at least one upper toggle plate, lower toggle lever and intermediate link. the

The utility model has at least one driving block, and each driving block is driven by at least one driving rod through a driving source. the

The drive source described in the utility model is a motor, the drive rod is composed of a screw and a nut, the nut and the screw constitute a ball screw structure, the motor is connected with the screw or the nut, the nut or the screw is fixed on the drive block, and the The rotation drives the nut or screw to reciprocate to push the drive block. the

The motor of the utility model is connected with the screw rod or the nut through a worm gear and/or a gear set. the

The driving source described in the utility model is a hydraulic cylinder, the driving rod is the piston rod of the hydraulic cylinder, and the end of the piston rod is fixed on the driving block. the

The upper toggle plate described in the utility model is a triangular plate, a circular plate or a support. the

The symmetrically arranged two toggle mechanisms described in the utility model are replaced by a single toggle mechanism. the

A press or injection molding machine, comprising a frame, a guide rail, a workbench and the toggle pressure transmission mechanism described in one of the above technical solutions. the

The transmission feature of the utility model is that: the drive rod drives the drive block to move back and forth along the axis of the drive rod, so that the connecting hinge of the middle connecting rod drives the upper toggle lever to swing left and right, and at the same time, the toggle hinge of the upper toggle drives the lower toggle to coordinate The action pushes the slider hinge to make the slider move up and down along the vertical track. the

The utility model utilizes the drive block to be hinged with one end of the intermediate connecting rod, the other end of the intermediate connecting rod is hinged with the upper toggle plate, and the upper toggle plate is hinged with the lower toggle plate through the toggle hinge to form a booster mechanism, which is driven by a driving rod. The driving block can make the driving block perform linear reciprocating motion. In the symmetrical structure, the slider has no side pressure on the guide rail, which can greatly reduce friction and improve transmission efficiency. Due to the use of the principle of the toggle lever force increase and the triangular plate force increase principle, compared with the traditional crank-connecting rod drive press and crank toggle drive press, the utility model can greatly reduce the Input power; the rated load working stroke range is larger; when the motor is used as the driving source, the slider can be controlled for variable speed movement, and the work efficiency can be improved. The press constituted by the utility model not only has the characteristics of high speed, positioning and repeat positioning accuracy of the mechanical press, but also has the pressure characteristic of the rated load and long working stroke of the hydraulic press. the

When the utility model is driven by an AC motor, it can only output the required energy during work. For intermittently working machines such as presses, no energy is consumed during the loading and unloading time, so it is basically energy-saving compared with the general general driving method. above 50. The control characteristics of the motor can be used to control the slider for variable speed movement and improve work efficiency. the

The utility model not only has the characteristics of the hydraulic transmission mechanism but also the characteristics of the crank connecting rod transmission and the toggle transmission mechanism, and has the effect of increasing force; it can work with the rated load in most of the stroke range of the slider movement, and the slider is in motion. The lateral force on the guide rail is equal to zero within the full stroke range, the slider can move at variable speeds, and can maintain pressure at the bottom dead center; it is suitable for the forming of metal, non-metal and special materials. the

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment one;

Fig. 2 is the structural representation of the utility model embodiment two;

Fig. 3 is the structural representation of the utility model embodiment three;

Fig. 4 is the structural representation one of embodiment four of the utility model;

Fig. 5 is the structure schematic diagram two of the utility model embodiment four;

Detailed ways

The toggle pressure transmission mechanism of the utility model will be further described below in conjunction with the accompanying drawings and embodiments. the

Embodiment one

As shown in Figure 1, the first upper bracket hinge 12A, the first toggle hinge 14A and the first connecting hinge 13A are fixed on the first upper bracket 8A, and the first upper bracket 8A is connected to the machine through the first upper beam hinge 12A. The frame 17 is connected; one end of the first lower toggle 9A is connected with the first upper toggle plate 8A through the first toggle hinge 14A, and the other end of the first lower toggle 9A is connected with the slider 10 through the first slider hinge 15A; the first One end of the intermediate connecting rod 7A is connected to the first upper toggle plate 8A through the first connecting hinge 13A, and the other end of the first intermediate connecting rod 7A is connected to the first driving block 6A through the first driving hinge 11A. the

Symmetrically, the toggle mechanism positioned on the right side of the vertical center line of the utility model mechanism is carrying out a symmetrical motion with the left side. A second upper beam hinge 12B, a second toggle hinge 14B and a second connection hinge 13B are fixed on the second upper bracket 8B, and the second upper bracket 8B is connected with the frame 17 through the second upper beam hinge 12B; One end of the lower toggle 9B is connected to the second upper toggle plate 8B through the second toggle hinge 14B, and the other end of the second lower toggle 9B is connected to the slider 10 through the second slider hinge 15B; one end of the second intermediate link 7B It is connected to the second upper toggle plate 8B through the second connecting hinge 13B, and the other end of the second intermediate link 7B is connected to the second driving block 6B through the second driving hinge 11B. the

The first drive block 6A is connected to the first intermediate link 7A through the first drive hinge 11A, and the second drive block 6B is connected to the second intermediate link 7B through the second drive hinge 11B, and is constrained by the slideway 5 to maintain horizontal and linear motion , to prevent instability caused by force;

The motor 1 is horizontally installed on the frame 17, the motor 1 is connected with the screw rod 3 through the shaft coupling 2, the first nut 4A on the screw rod 3 is fixed on the first drive block 6A, and the second nut 4B is fixed on the drive block 6B, both The direction of rotation of the two nuts is opposite. The rotation of the motor 1 will cause the first driving block 6A and the second driving block 6B to move in opposite directions along the horizontal line, thereby driving the two toggle mechanisms to do completely symmetrical work. The motor 1 can be rotated and driven in both positive and negative directions, and can control output torque and rotational speed. the

Slider 10 is connected with described first lower toggle 9A by first slider hinge 15A, is connected with described second lower toggle 9B by second slider hinge 15B, slider 10 is guided by guide rail 16, prevents by Instability caused by partial load. the

The slide block 10 has an upper dead center and a lower dead center in operation, which is determined by the link mechanism itself. According to the actual situation, the length of each rod in the toggle mechanism is different, and the state of the mechanism will be different when it is at the bottom dead center. When it is at the bottom dead center, the state of the mechanism may be: the straight line passing through the first upper beam hinge 12A and the first toggle hinge 14A and the straight line passing through the second upper beam hinge 12B and the second toggle hinge 14B are in a vertical state , or the straight line passing through the first driving hinge 11A and the first connecting hinge 13A and the straight line passing through the second driving hinge 11B and the second connecting hinge 13B are in a vertical state, or the four lines are all vertical. the

When the first driving block 6A and the second driving block 6B were close to the vertical center line of this toggle pressure transmission mechanism, the slide block 10 was at the top dead center of the stroke. the

The line segment with the axis of the first connecting hinge 13A and the axis of the first driving hinge 11A as the end points, and the straight line passing through the axis of the first upper beam hinge 12A and the axis of the first toggle hinge 14A are located on the same plane, and the entire working In the process, they are always kept disjoint. Symmetrically, the line segment with the axis of the second connecting hinge 13B and the axis of the second driving hinge 11B as the end points and the straight line passing through the axis of the second upper beam hinge 12B and the axis of the second toggle hinge 14B are located on the same plane, and Throughout the work process, always remain disjoint. the

Example two

As shown in FIG. 2 , in this embodiment, the toggle pressure transmission mechanism replaces the symmetrical two toggle mechanisms in Embodiment 1 with a single toggle mechanism. The specific arrangement is as follows: the upper toggle plate 8 is fixed with an upper beam hinge 12, a toggle hinge 14 and a connecting hinge 13, and the upper toggle plate 8 is connected with the frame 17 through the upper beam hinge 12; one end of the lower toggle 9 is connected with the toggle hinge 14 It is connected with the upper toggle plate 8, and the other end of the lower toggle lever 9 is connected with the slider 10 through the slider hinge 15; one end of the intermediate link 7 is connected with the upper toggle plate 8 through the connecting hinge 13, and the other end of the intermediate link 7 is driven by The hinge 11 is connected with the driving block 6 . the

The driving block 6 is connected with the intermediate connecting rod 7 through the driving hinge 11, and is constrained by the slideway 5 to keep linear motion to prevent instability caused by force. the

The motor 1 is installed on the frame horizontally. The motor 1 is connected with the screw 3 through the coupling 2. The nut 4 on the screw 3 is fixed on the drive block 6. The motor 1 can be rotated and driven in both positive and negative directions, and can control the output torque and speed. . the

The slider 10 is connected with the lower toggle 9 through a slider hinge 15 , and the slider 10 is guided by a guide rail 16 . the

When the connecting hinge 11 is at the farthest horizontal distance from the upper beam hinge 12, the slider 10 is at the top dead center of the stroke. When the slider 10 is at the bottom dead center of the stroke, the straight line passing through the drive hinge 11 and the connecting hinge 13 is in a vertical state, or the straight line passing through the upper beam hinge 12 and the toggle hinge 14 is in a vertical state, or the two straight lines are at the same time All plumb. the

The line segment connecting the axis of the hinge 12 and the axis of the drive hinge 11 as the endpoint, and the straight line passing through the axis of the upper crossbeam hinge 12 and the axis of the toggle hinge 14 are located in the same plane, and remain disjoint throughout the entire working process. the

This mechanism cannot guarantee that the slider has no lateral force in the whole stroke like the first embodiment, but multiple embodiments can be symmetrically arranged to eliminate the lateral force of the slider. the

Embodiment three

As shown in Fig. 3, in this embodiment, the motor 1, the coupling 2, the screw 3, the nut 4, the slideway 5, and the driving block 6 in the second embodiment are replaced by a vertical arrangement instead of a horizontal arrangement. The other components are the same as in the second embodiment, under the drive of the motor 1 and the screw 3, the slider can move up and down along the vertical direction. the

When the connecting hinge 13 is at the farthest horizontal distance from the upper beam hinge 12, the slider 10 is at the top dead center of the stroke. When the slider 10 is at the bottom dead center of the stroke, the straight line passing through the driving hinge 11 and the connecting hinge 13 is in a horizontal state, or the straight line passing through the upper beam hinge 12 and the toggle hinge 14 is in a vertical state, or both states occur simultaneously. the

The line segment connecting the axis of the hinge 12 and the axis of the drive hinge 11 as the endpoint, and the straight line passing through the axis of the upper crossbeam hinge 12 and the axis of the toggle hinge 14 are located in the same plane, and remain disjoint throughout the entire working process. the

This mechanism cannot guarantee that the slider has no lateral force in the whole stroke like the first embodiment, but multiple embodiments can be symmetrically arranged to eliminate the lateral force of the slider. the

Embodiment four

As shown in Figure 4, in this embodiment, the first and second drive blocks in Embodiment 1 are combined into one drive block, and its movement is changed from horizontal to vertical, correspondingly the first and second nuts Combined into one nut, while corresponding changes are made to the motor, shaft coupling and screw rod, etc., and the arrangement of other parts is similar to that of Embodiment 1. the

The specific arrangement is as follows: the first upper beam hinge 12A, the first toggle hinge 14A and the first connecting hinge 13A are fixed on the first upper toggle plate 8A, and the first upper toggle plate 8A connects with the frame through the first upper beam hinge 12A 17 connection; one end of the first lower toggle 9A is connected with the first upper toggle plate 8A through the first toggle hinge 14A, and the other end of the first lower toggle 9A is connected with the slider 10 through the first slider hinge 15A; the first middle One end of the connecting rod 7A is connected to the first upper toggle plate 8A through the first connecting hinge 13A, and the other end of the first intermediate connecting rod 7A is connected to the driving block 6 through the first driving hinge 11A. the

Symmetrically, the toggle mechanism located on the right side of the vertical center line of the mechanism of the utility model is carrying out a symmetrical motion with the left side. A second upper beam hinge 12B, a second toggle hinge 14B and a second connection hinge 13B are fixed on the second upper bracket 8B, and the second upper bracket 8B is connected with the frame 17 through the second upper beam hinge 12B; One end of the lower toggle 9B is connected to the second upper toggle plate 8B through the second toggle hinge 14B, and the other end of the second lower toggle 9B is connected to the slider 10 through the second slider hinge 15B; one end of the second intermediate link 7B It is connected to the second upper toggle plate 8B through the second connecting hinge 13B, and the other end of the second intermediate link 7B is connected to the driving block 6 through the second driving hinge 11B. the

The motor 1 is installed on the frame 17, and the motor 1 is connected with the screw rod 3 arranged vertically through the shaft coupling 2, and the nut 4 on the screw rod 3 is fixed on the driving block 6. The rotation of the motor 1 drives the drive block 6 to move, thereby driving the two toggle mechanisms to work completely symmetrically. The motor 1 can be rotated and driven in both positive and negative directions, and can control output torque and rotational speed. The driving block 6 does not need the constraint of the slideway 5 . the

The line segment with the axis of the first connecting hinge 13A and the axis of the first driving hinge 11A as the end points, and the straight line passing through the axis of the first upper beam hinge 12A and the axis of the first toggle hinge 14A are located on the same plane, and the entire working In the process, they are always kept disjoint. Symmetrically, the line segment with the axis of the second connecting hinge 13B and the axis of the second driving hinge 11B as the end points and the straight line passing through the axis of the second upper beam hinge 12B and the axis of the second toggle hinge 14B are located on the same plane, and Throughout the work process, always remain disjoint. the

As shown in FIG. 5 , in order to prevent the mechanism from interfering, a third intermediate link 7C, a fourth intermediate link 7D, and a third lower toggle 9C and a fourth lower toggle 9D can also be added to the mechanism. the

In the above embodiment, the driving source is a motor, the driving rod is composed of a screw and a nut, and the nut and the screw constitute a ball screw structure, the motor is connected with the screw through a coupling, and the nut is fixed on the driving block; in addition, between the motor and the screw It can be connected through worm gears, gear sets and other mechanisms; in addition, the motor can also drive the nut to rotate, and drive the screw to move up and down to push the drive block. The utility model can also adopt a hydraulic system as a driving source, the driving rod is a piston rod of a hydraulic cylinder, and the end of the piston rod is fixed on the driving block. the

Install the utility model on a specially designed machine body with workbench 18 and guide rail 16 to form a press or injection molding machine that can be used for plastic processing. When the load is eccentric, the guide rail can constrain the slider to maintain linear motion, thus ensuring the machining accuracy. The upper mold is installed on the bottom of the slider, and the lower mold is installed on the worktable, which can be used for plastic processing such as stamping, deep drawing, extrusion, and embossing of materials. the

Claims (10)

1. toggle lever pressure transmission mechanism, comprise slide block, driving source, driveshaft and elbow-bar mechanism, described elbow-bar mechanism is two, be symmetrically arranged in the vertical center line of described toggle lever pressure transmission mechanism both sides, this elbow-bar mechanism comprises bracket, lower elbow lever and intermediate connecting rod, last bracket is by the toggle link hinge, connect hinge and upper beam hinge respectively with lower elbow lever one end, intermediate connecting rod one end links to each other with frame, the lower elbow lever the other end is connected with slide block by the slide block hinge, the intermediate connecting rod the other end is connected with driving block by driving hinge

It is characterized in that, in each described elbow-bar mechanism, in the same plane to drive hinge and and is connected the line segment that the hinge axle center is an end points and pass through the straight line in upper beam hinge axle center and toggle link hinge axle center, and in the entire work process of mechanism, remain non-intersect.

2. toggle lever pressure transmission mechanism as claimed in claim 1 is characterized in that, described driving block is horizontal reciprocating movement or up-and-down movement on driveshaft under drive source drives, thereby drives elbow-bar mechanism work.

3. toggle lever pressure transmission mechanism as claimed in claim 1 or 2 is characterized in that, in each described elbow-bar mechanism, the number of last bracket, lower elbow lever and intermediate connecting rod is at least one.

4. toggle lever pressure transmission mechanism as claimed in claim 1 or 2 is characterized in that, described driving block is at least one, and each driving block is driven by driving source by at least one driveshaft.

5. toggle lever pressure transmission mechanism as claimed in claim 1 or 2, it is characterized in that, described driving source is a motor, described driveshaft is made up of screw rod and nut, nut and screw rod constitute the ball screw structure, motor is connected with screw rod or nut, and nut or screw rod are fixed on the driving block, thereby drives nut or screw rod to-and-fro motion promotion driving block by the rotation of screw rod or nut.

6. toggle lever pressure transmission mechanism as claimed in claim 5 is characterized in that, is connected by worm and gear and/or gear train between motor and screw rod or the nut.

7. toggle lever pressure transmission mechanism as claimed in claim 1 or 2 is characterized in that, described driving source is an oil hydraulic cylinder, and driveshaft is the piston rod of oil hydraulic cylinder, and the termination of piston rod is fixed on the driving block.

8. toggle lever pressure transmission mechanism as claimed in claim 1 or 2 is characterized in that: described upward bracket is set square triangle, circular plate or support.

9. toggle lever pressure transmission mechanism as claimed in claim 1 or 2 is characterized in that, described two elbow-bar mechanism that are symmetric arrangement replace with single elbow-bar mechanism.

10. press machine or injection machine comprise one of frame, guide rail, worktable and aforesaid right requirement 1-9 described toggle lever pressure transmission mechanism.

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