CN213440965U

CN213440965U - Negative relief angle type crank connecting rod die-closing mechanism

Info

Publication number: CN213440965U
Application number: CN202021687148.4U
Authority: CN
Inventors: 傅南红; 李显达; 陈邦锋; 贺天鹏
Original assignee: Ningbo Zhafir Plastics Machinery Co ltd
Current assignee: Ningbo Zhafir Plastics Machinery Co ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-06-15
Anticipated expiration: 2030-08-13

Abstract

The utility model discloses a negative relief angle type crank connecting rod mould closing mechanism, which comprises a tail plate, a movable mould plate and a crank connecting rod mechanism, wherein the crank connecting rod mechanism comprises a thrust seat and a pair of connecting rod components which are symmetrically distributed up and down, each connecting rod component comprises two independent front connecting rods, three independent rear connecting rods and a small connecting rod, the front ends of the two front connecting rods are hinged with the rear end surface of the movable mould plate, the rear ends of the two front connecting rods are hinged with the front ends of the three rear connecting rods, the rear ends of the three rear connecting rods are hinged with the front end surface of the tail plate, one end of the small connecting rod passes through the middle part of the rear connecting rod distributed in the middle and is hinged with the middle part of the rear connecting rod distributed in the middle, the other end of the small connecting rod is hinged with the, the center connecting line of the front end and the rear end of the rear connecting rod is a boundary, and the hinged position of the middle part of the rear connecting rod distributed in the middle and one end of the small connecting rod is positioned on the opposite side of the hinged position of the other end of the small connecting rod and the thrust seat; its advantages are short moving stroke and high force amplification ratio.

Description

Negative relief angle type crank connecting rod die-closing mechanism

Technical Field

The utility model relates to a locking mechanism in the injection molding machine especially relates to a burden relief angle formula toggle connecting rod locking mechanism.

Background

In recent years, the injection molding machine industry has become competitive, which requires injection molding machine manufacturers to improve the work efficiency of products through technical innovation. The existing injection molding machine toggle connecting rod mold closing mechanism has the force amplification efficiency and the speed lifting capacity which are close to the limit and cannot be further lifted, so that the market demand is difficult to meet.

Such as: the invention patent 'toggle connecting rod mould closing mechanism' (patent number: ZL 200910101481.4) announced by China comprises a tail plate, a movable template and a pair of toggle connecting rod structures, wherein each toggle connecting rod structure comprises a front connecting rod, a rear connecting rod, a small connecting rod and a pushing seat, the front end of the front connecting rod is hinged with the rear end surface of the movable template, the rear end of the front connecting rod is hinged with the front end of the rear connecting rod, the rear end of the rear connecting rod is hinged with the front end surface of the tail plate, one end of the small connecting rod is hinged with the middle part of the rear connecting rod, the other end of the small connecting rod is hinged with one side of the pushing seat, and the pushing seat is limited between the tail plate and the movable template and can move back and forth: the front connecting rod is an integral piece, the front end of the front connecting rod is provided with two front lugs hinged with the rear end surface of the movable template, and the rear end of the front connecting rod is provided with three rear lugs hinged with the rear connecting rod. The toggle connecting rod mould closing mechanism has the advantages of simple structure and long service life of the movable mould plate and the tail plate, but because the hinged position of one end of the small connecting rod and the middle part of the rear connecting rod and the hinged position of the other end of the small connecting rod and one side of the pushing seat are positioned on the same side (see figure 1 in 200910101481.4 document) with the central connecting line of the front end and the rear end of the rear connecting rod as a dividing line, the motion stroke of the toggle connecting rod mould closing mechanism is long, and the force amplification ratio is small.

Disclosure of Invention

The utility model aims to solve the technical problem that a negative relief angle formula toggle connecting rod locking mechanism is provided, its motion stroke is short, and power amplification is than big.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a negative relief angle formula bent elbow connecting rod locking mechanism, include tailboard, movable mould board and set up in the tailboard with the movable mould board between be used for the drive the movable mould board relative the tailboard remove bent elbow connecting rod mechanism, bent elbow connecting rod mechanism include thrust bearing and a pair of upper and lower symmetric distribution's link assembly, its characterized in that: each connecting rod component consists of two front connecting rods which are independent from each other and are arranged in parallel at the same height position, three rear connecting rods which are independent from each other and are arranged in parallel at the same height position, and a small connecting rod, wherein the front ends of the two front connecting rods are hinged with the rear end surface of the movable template, the rear ends of the two front connecting rods are hinged with the front ends of the three rear connecting rods, the rear ends of the three rear connecting rods are hinged with the front end surface of the tail plate, one end of the small connecting rod penetrates through the middle part of the rear connecting rod distributed in the middle and is hinged with the middle part of the rear connecting rod distributed in the middle, the other end of the small connecting rod is hinged with the thrust seat, and the hinged position of the middle part of the rear connecting rod and one end of the small connecting rod which are distributed in the middle is positioned at the opposite side of the hinged position of the other end of the small connecting rod and the thrust seat by taking the central connecting line of the front end and the rear end of the rear connecting rod as a boundary.

The rear end surface of the movable template is provided with three rear supports, the rear ends of the three rear supports are jointly fixed with a front large pin shaft, the front large pin shaft cannot rotate relative to the three rear supports, the front ends of the two front connecting rods are movably sleeved on the front large pin shaft and can rotate relative to the front large pin shaft, the front end of each front connecting rod is positioned between the rear ends of the two adjacent rear supports and clings to the side surface of each front connecting rod, the front ends of the three rear connecting rods are jointly fixed with a middle large pin shaft, the middle large pin shaft cannot rotate relative to the three rear connecting rods, the rear ends of the two front connecting rods are movably sleeved on the middle large pin shaft and can rotate relative to the middle large pin shaft, and the rear end of each front connecting rod is positioned between the front ends of the two adjacent rear connecting rods and clings to the side surface of each front connecting rod, the front end surface of the tail plate is provided with two front supports, the rear ends of the three rear connecting rods are jointly fixed with a rear large pin shaft, the rear large pin shaft cannot rotate relative to the three rear connecting rods, the front ends of the two front supports are movably sleeved on the rear large pin shaft and can rotate relative to the rear large pin shaft, the front end of each front support is positioned between the rear ends of the two adjacent rear connecting rods, the side surfaces of the front supports are tightly attached to the rear ends of the two rear connecting rods, the middle part of the rear connecting rod distributed in the middle is provided with a square through hole along the front and rear end directions, one end of each small connecting rod penetrates through the square through hole, the middle part of the rear connecting rod distributed in the middle is positioned on two sides of the square through hole in the width direction, a first small pin shaft cannot rotate relative to the middle part of the rear connecting rod distributed in the middle, the two sides of the square through hole in the width direction, one end of the small connecting rod is movably sleeved on the first small pin shaft and can rotate relative to the first small pin shaft, two side parts of the middle part of the rear connecting rod distributed in the middle in the width direction of the square through hole are tightly attached to the side surfaces of two sides of one end of the small connecting rod, one end of the thrust seat, which is hinged with the other end of the small connecting rod, is divided into two parts, so that the other end of the small connecting rod is just embedded into the thrust seat, a second small pin shaft is fixed on two parts divided by one end of the thrust seat and can not rotate relative to the two parts divided by one end of the thrust seat, the other end of the small connecting rod is movably sleeved on the second small pin shaft and can rotate relative to the second small pin shaft, the other end of the small connecting rod is clamped between two parts divided by one end of the thrust seat.

The distribution is in the centre the back connecting rod be three holes back connecting rod, and the symmetric distribution is in three holes back connecting rod two of both sides the back connecting rod be two holes back connecting rod, two holes back connecting rod and three holes back connecting rod the front end and the rear end respectively have an end hole, three holes back connecting rod the middle part be located square through hole's width direction's both sides part respectively have a shaft hole, two coaxial the shaft hole constitute three holes back connecting rod's middle part hole, the middle part hole be located two the one side of the center line of end hole, be located the front end the end hole with middle big round pin axle adaptation, be located the rear end the end hole with back big round pin axle adaptation, the middle part hole with first little round pin axle adaptation. The middle hole is a hinged position of the middle part of the three-hole rear connecting rod and one end of the small connecting rod, the middle hole is positioned on one side of a central connecting line of the two end holes, and the hinged position of the other end of the small connecting rod and the thrust seat is positioned on the other side of the central connecting line of the two end holes.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses a bent elbow connecting rod locking mechanism, the articulated position of the middle part of the back connecting rod in the middle of distributing and the one end of little connecting rod lies in the front end of back connecting rod and the center line of rear end be the boundary, the other end of little connecting rod and the offside of the articulated position of thrust bearing, two articulated positions of little connecting rod are promptly not in same one side of back connecting rod, the motion stroke of having shortened this bent elbow connecting rod locking mechanism has improved power amplification efficiency, thereby the production efficiency is improved, and the production cost is reduced.

Drawings

Fig. 1 is a plan view of the negative relief angle type toggle link clamping mechanism of the present invention;

fig. 2 is a cross-sectional view of the movable platen of the negative relief angle type toggle link clamping mechanism of the present invention before and after moving relative to the tail plate;

fig. 3 is a schematic structural view of three rear connecting rods in the connecting rod assembly in the toggle link mechanism in the negative relief angle type toggle link mold clamping mechanism according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The utility model provides a negative relief angle formula toggle connecting rod locking mechanism, as shown in the figure, it includes tailboard 1, movable mould board 2 and sets up the toggle link mechanism 3 that is used for driving movable mould board 2 and moves relative to tailboard 1 between tailboard 1 and movable mould board 2, toggle link mechanism 3 includes thrust bearing 34 (cross head) and a pair of upper and lower symmetrical distribution's link assembly, each link assembly comprises two independent and parallel arrangement's on the same altitude position preceding link 31 each other, three independent and parallel arrangement's on the same altitude position back link 32 each other, a little link 33, the front end of two preceding link 31 is articulated with the rear end face of movable mould board 2, the rear end of two preceding link 31 is articulated with the front end of three back link 32, the rear end of three back link 32 is articulated with the front end face of tailboard 1, the one end of little link 33 passes the middle part of the back link 32 that distributes in the middle and is articulated with the middle part of the back link 32 that distributes in the middle, the other end of the small link 33 is hinged with the thrust seat 34, and the central connecting line of the front end and the rear end of the rear link 32 is a boundary line, and the hinged position of the middle part of the rear link 32 and one end of the small link 33 which are distributed in the middle is positioned on the opposite side of the hinged position of the other end of the small link 33 and the thrust seat 34.

In this embodiment, the rear end surface of the movable mold plate 2 has three rear brackets 21, the rear ends of the three rear brackets 21 are jointly fixed with a front large pin shaft 35, the front large pin shaft 35 cannot rotate relative to the three rear brackets 21, the front ends of the two front connecting rods 31 are movably sleeved on the front large pin shaft 35 and can rotate relative to the front large pin shaft 35, the front end of each front connecting rod 31 is positioned between the rear ends of the two adjacent rear brackets 21 and clings to the side surface, the front ends of the three rear connecting rods 32 are jointly fixed with a middle large pin shaft 36, the middle large pin shaft 36 cannot rotate relative to the three rear connecting rods 32, the rear ends of the two front connecting rods 31 are movably sleeved on the middle large pin shaft 36 and can rotate relative to the middle large pin shaft 36, the rear end of each front connecting rod 31 is positioned between the front ends of the two adjacent rear connecting rods 32 and clings to the side surface, the front end surface of the tail plate 1 has two front brackets 11, the rear ends of the three rear connecting rods 32 are jointly fixed with a rear large pin shaft, the rear big pin shaft 37 can not rotate relative to the three rear connecting rods 32, the front ends of the two front brackets 11 are movably sleeved on the rear big pin shaft 37 and can rotate relative to the rear big pin shaft 37, the front end of each front bracket 11 is positioned between the rear ends of the two adjacent rear connecting rods 32 and is tightly attached to the side surface, the middle part of the rear connecting rod 32 distributed in the middle is provided with a square through hole 321 along the front and rear end direction, one end of the small connecting rod 33 passes through the square through hole 321, the two side parts of the middle part of the rear connecting rod 32 distributed in the middle in the width direction of the square through hole 321 are fixed with the first small pin shaft 38, the first small pin shaft 38 can not rotate relative to the two side parts of the middle part of the rear connecting rod 32 distributed in the middle in the width direction of the square through hole 321, one end of the small connecting rod 33 is movably sleeved on the first small pin shaft 38 and can rotate relative to the first small pin shaft 38, the two side parts 322 of the middle part of the rear connecting rod 32 distributed in the width direction of the, the thrust seat 34 is used for dividing one end hinged with the other end of the small connecting rod 33 into two parts, so that the other end of the small connecting rod 33 is just embedded into the thrust seat 34, a second small pin 39 is fixed on two parts 341 divided by one end of the thrust seat 34, the second small pin 39 cannot rotate relative to the two parts 341 divided by one end of the thrust seat 34, the other end of the small connecting rod 33 is movably sleeved on the second small pin 39 and can rotate relative to the second small pin 39, and the other end of the small connecting rod 33 is clamped between the two parts 341 divided by one end of the thrust seat 34.

In this embodiment, the rear link 32 distributed in the middle is a three-hole rear link, and the two rear links 32 symmetrically distributed on both sides of the three-hole rear link are two-hole rear links, the front ends and the rear ends of the two-hole rear link and the three-hole rear link are respectively provided with an end hole 323, two side portions 322 of the middle portion of the three-hole rear link in the width direction of the square through hole 321 are respectively provided with a shaft hole 324, the two coaxial shaft holes 324 form a middle hole of the three-hole rear link, the middle hole is located on one side of a central connecting line of the two end holes 323, the end hole 323 located at the front end is adapted to the middle large pin shaft 36, the end hole 323 located at the rear end is adapted to the rear large pin shaft 37, and the middle hole is adapted to the first. The middle hole is a hinged position of the middle part of the three-hole rear connecting rod and one end of the small connecting rod 33, and is positioned on one side of a central connecting line of the two end holes 323, and the hinged position of the other end of the small connecting rod 33 and the thrust seat 34 is positioned on the other side of the central connecting line of the two end holes 323.

Claims

1. The utility model provides a negative relief angle formula bent elbow connecting rod locking mechanism, include tailboard, movable mould board and set up in the tailboard with the movable mould board between be used for the drive the movable mould board relative the tailboard remove bent elbow connecting rod mechanism, bent elbow connecting rod mechanism include thrust bearing and a pair of upper and lower symmetric distribution's link assembly, its characterized in that: each connecting rod component consists of two front connecting rods which are independent from each other and are arranged in parallel at the same height position, three rear connecting rods which are independent from each other and are arranged in parallel at the same height position, and a small connecting rod, wherein the front ends of the two front connecting rods are hinged with the rear end surface of the movable template, the rear ends of the two front connecting rods are hinged with the front ends of the three rear connecting rods, the rear ends of the three rear connecting rods are hinged with the front end surface of the tail plate, one end of the small connecting rod penetrates through the middle part of the rear connecting rod distributed in the middle and is hinged with the middle part of the rear connecting rod distributed in the middle, the other end of the small connecting rod is hinged with the thrust seat, and the hinged position of the middle part of the rear connecting rod and one end of the small connecting rod which are distributed in the middle is positioned at the opposite side of the hinged position of the other end of the small connecting rod and the thrust seat by taking the central connecting line of the front end and the rear end of the rear connecting rod as a boundary.

2. The negative clearance toggle link clamping mechanism of claim 1, wherein: the rear end surface of the movable template is provided with three rear supports, the rear ends of the three rear supports are jointly fixed with a front large pin shaft, the front large pin shaft cannot rotate relative to the three rear supports, the front ends of the two front connecting rods are movably sleeved on the front large pin shaft and can rotate relative to the front large pin shaft, the front end of each front connecting rod is positioned between the rear ends of the two adjacent rear supports and clings to the side surface of each front connecting rod, the front ends of the three rear connecting rods are jointly fixed with a middle large pin shaft, the middle large pin shaft cannot rotate relative to the three rear connecting rods, the rear ends of the two front connecting rods are movably sleeved on the middle large pin shaft and can rotate relative to the middle large pin shaft, and the rear end of each front connecting rod is positioned between the front ends of the two adjacent rear connecting rods and clings to the side surface of each front connecting rod, the front end surface of the tail plate is provided with two front supports, the rear ends of the three rear connecting rods are jointly fixed with a rear large pin shaft, the rear large pin shaft cannot rotate relative to the three rear connecting rods, the front ends of the two front supports are movably sleeved on the rear large pin shaft and can rotate relative to the rear large pin shaft, the front end of each front support is positioned between the rear ends of the two adjacent rear connecting rods, the side surfaces of the front supports are tightly attached to the rear ends of the two rear connecting rods, the middle part of the rear connecting rod distributed in the middle is provided with a square through hole along the front and rear end directions, one end of each small connecting rod penetrates through the square through hole, the middle part of the rear connecting rod distributed in the middle is positioned on two sides of the square through hole in the width direction, a first small pin shaft cannot rotate relative to the middle part of the rear connecting rod distributed in the middle, the two sides of the square through hole in the width direction, one end of the small connecting rod is movably sleeved on the first small pin shaft and can rotate relative to the first small pin shaft, two side parts of the middle part of the rear connecting rod distributed in the middle in the width direction of the square through hole are tightly attached to the side surfaces of two sides of one end of the small connecting rod, one end of the thrust seat, which is hinged with the other end of the small connecting rod, is divided into two parts, so that the other end of the small connecting rod is just embedded into the thrust seat, a second small pin shaft is fixed on two parts divided by one end of the thrust seat and can not rotate relative to the two parts divided by one end of the thrust seat, the other end of the small connecting rod is movably sleeved on the second small pin shaft and can rotate relative to the second small pin shaft, the other end of the small connecting rod is clamped between two parts divided by one end of the thrust seat.

3. The negative clearance toggle link clamping mechanism of claim 2, wherein: the distribution is in the centre the back connecting rod be three holes back connecting rod, and the symmetric distribution is in three holes back connecting rod two of both sides the back connecting rod be two holes back connecting rod, two holes back connecting rod and three holes back connecting rod the front end and the rear end respectively have an end hole, three holes back connecting rod the middle part be located square through hole's width direction's both sides part respectively have a shaft hole, two coaxial the shaft hole constitute three holes back connecting rod's middle part hole, the middle part hole be located two the one side of the center line of end hole, be located the front end the end hole with middle big round pin axle adaptation, be located the rear end the end hole with back big round pin axle adaptation, the middle part hole with first little round pin axle adaptation.