CN2242775Y

CN2242775Y - Clamping mechanism

Info

Publication number: CN2242775Y
Application number: CN 96229207
Authority: CN
Inventors: 刘资丰
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-31
Filing date: 1996-01-31
Publication date: 1996-12-18
Anticipated expiration: 2006-01-31

Abstract

The utility model provides an improved clamping mechanism, which is characterized in that both sides of an oil cylinder are respectively provided with a C-shaped connecting board; both ends of the C-shaped connecting board are respectively hinged with the oil cylinder and a fixed moulding board, and the center line of two hinge jointing points are collinear with the center line of the oil cylinder, and thereby, the simple structure ensures the accuracy of the locking mould; the inner part of the back oil cylinder body of the oil cylinder is provided with a piston and an oil guiding bar; the front end of the piston is fixedly provided with a piston-rod which is fixedly connected with a front oil cylinder body to form the double functions of speed increase and the force increase; the action of mould matching, mould retreating and mould locking by force increase is finished via a smaller volumetric pump group to reduce the size, weight and energy consumption of the equipment, and the utility model is suitable for the plastic moulding or aluminium pressure casting.

Description

Clamping mechanism

The utility model relates to the parts of a kind of forcing press, particularly a kind of forcing press.Applicable plastic moulding or aluminium compression casting.

Existing forcing press clamping is power with the hydraulic jack, oil cylinder drives template by one group of jointed gear unit, template is to count the guide rod guiding, its cylinder sizes is less, the locked mode precision is higher, but the large-sized structural parts quantity of this structure is many, the manufacture process requirement height, increase equipment cost, the mold attaching/detaching difficulty, increase the product processing cost, influence the raising of production efficiency simultaneously, for addressing these problems, the dealer has proposed new technical scheme, the oil cylinder of this scheme is articulated in frame, the oil cylinder plunger is direct and moving platen is hinged, be designed to oil cylinder and directly drive template, reduce large-sized structural parts quantity, improve efficiency of equipment, and when guaranteeing that with an adjusting device moving platen is just installed to the depth of parallelism of fixed form, guarantee steadily moving of moving platen and locked mode reliably with a guided bearing mechanism, but this scheme must be provided with two cover auxiliary bodies in order to guarantee the locked mode precision, increase equipment complexity and plant maintenance workload, two articulated structures of oil cylinder and plunger bear bigger unidirectional load, and manufacture process requirement is higher; Oil cylinder directly drives template, though can simplified structure and get rid of the interference of guide rod to production operation, locked mode requires great active force, under the constant condition of hydraulic working oil power, owing to there is not force amplificatory structure, require cylinder diameter to have large-size, for guaranteeing operating efficiency, the oil cylinder plunger movement speed that should be necessary, big cylinder diameter and higher translational speed, hydraulic pump group that then must larger capacity, its result heightens the dimension and weight of entire equipment, also increases the consumption of the energy simultaneously.

The purpose of this utility model is that a kind of improved clamping mechanism will be provided, and it guarantees the locked mode precision with simple structure, and member bears service load with preferred mode, has both guaranteed the equipment operating efficiency simultaneously, has the pump group than low capacity again.

The utility model is achieved in that establishes a C type connecting plate respectively in the both sides of oil cylinder, C type connecting plate one end is hinged with the back cylinder body of axle and oil cylinder, its other end is hinged with axle and fixed form, the line of centres of C type connecting plate two ends pin joint and the centerline collineation of oil cylinder and piston rod are to guarantee the permanent center by two templates of clamp force; Establish piston and oil-deflecting rod in the back cylinder body of oil cylinder, piston nose sets firmly piston rod, and piston rod and preceding cylinder body are affixed, set firmly moving platen on the front end face of preceding cylinder body, forms to quicken and two kinds of afterburning functional structures.

The utility model possesses whole advantages that oil cylinder directly drives template, owing to adopt C shape connecting plate structure, convert the active force system of locked mode to sealing internal force that C shape connecting plate strain produces, and this power is by oil cylinder or template center, eliminated template and produce the phenomenon of distortion under the clamp force effect, improved the locked mode precision, C shape connecting plate articulated structure then reduces the number of components significantly, reduce manufacturing cost, reduce maintenance cost; The utility model adopts the power drive mode of quickening with afterburning two kinds of functions, when operation, matched moulds, move back mould with low load quick acting, locked mode then needs the action of low speed top load, with pump group than low capacity, realize that quick acting and oil cylinder directly drive mould locking, reduce equipment size, weight, reduce the energy resource consumption of equipment.

The concrete structure of utility model is provided by following examples and accompanying drawing thereof.

Fig. 1 is the front elevational schematic of the utility model clamping mechanism.

Fig. 2 is the structure top cross-sectional view of Fig. 1.

Fig. 3 be among Fig. 1 A to schematic diagram.

Fig. 4 is hydraulic-driven effect (matched moulds) schematic diagram.

Fig. 5 is hydraulic-driven effect (moving back a mould) schematic diagram.

With reference to Fig. 1; 2; clamping mechanism is by oil cylinder 1; piston rod 2; moving platen 3; fixed form 4; compositions such as pedestal 5 and C shape connecting plate 6; oil cylinder 1 is fixed on the pedestal 5 with fixed form 4; the center line of oil cylinder 1 is perpendicular to two shuttering work planes and be in the center of two templates; establish a C shape connecting plate 6 respectively in the both sides of oil cylinder 1; C shape connecting plate 6 one ends are hinged with the back cylinder body 10 of oil cylinder 1 with axle 40; its other end is hinged with axle 40 and fixed form 4; an amount of swing can be done around axle 40 in C shape connecting plate 6 two ends, the line of centres of C shape connecting plate 6 two ends pin joints and the centerline collineation of oil cylinder 1 and piston rod 2.Establish piston 104 and oil-deflecting rod 11 in the back cylinder body 10 of oil cylinder 1, piston 104 and back cylinder cover 103 constitute the back cavity 106 of turnover work fluid in the cylinder body 10 of back, piston 104 and cylinder cap 105 constitute the ante-chamber 107 of turnover work fluid in the cylinder body 10 of back, before, back cavity 107,106 each joint are all established sealing ring, use bolting one gland 101 on the rear end back cylinder cover 103 of back cylinder body 10, two semi-rings 111 of gland 101 through being equipped in oil-deflecting rod 11 rear end annular grooves are pressed abd fixed on oil-deflecting rod 11 on the back cylinder cover 103, sealing ring is all established to constitute an annular seal space 102 with back cylinder cover 103 each joint in gland 101 inside simultaneously, and annular seal space 102 is communicated with oil-deflecting rod 11 and the piston rod 2 inner common acceleration oil pockets 110 that constitute.The front end face of piston 104 is arranged with a groove, and stretch in the groove rear end of piston rod 2, and with bolt piston rod 2 is fixed on the piston 104; The front end of piston rod 2 is established a cannelure, and card is established two semi-rings 21 of band through hole in the cannelure, and piston rod 2 is fixedlyed connected with preceding cylinder body 22 by the bolt that passes two semi-rings, 21 through holes, establishes in the preceding cylinder body 22 template power piston 220 is installed; Before set firmly moving platen 3 with bolt on the front end face of cylinder body 22, both sides, moving platen 3 lower end set firmly a footing 30 that is supported on base plane 51 respectively, as shown in Figure 3, footing 30 sides are established pressing plate 31.

With reference to Fig. 4,5, when matched moulds, hydraulic oil enters annular seal space 102, through quickening oil pocket 110, cylinder body 22 before the ejection, and traction piston 104, piston rod 2 and moving platen 3 are to the previous crops fast moving, because this moment, mobile required drive was little, the passage aperture is less, therefore require the capacity of pump group also less, in the shift action process, the back cavity 106 in the back cylinder body 10 sucks low pressure oil from the gravity fuel tank, 107 of ante-chambers are discharged low pressure oil, after shift action was finished, matched molds closed up, and the required mobile distance of template this moment is minimum, also minimum at the flow of back cavity input hydraulic oil thereupon, but because back cylinder body 10 internal diameters are very big, and the external diameter of oil-deflecting rod 11 is very little, thereby sets up a bigger thrust, required for mould locking, the powerful axial thrust that hydraulic pressure is set up is converted into the internal tension at C shape connecting plate 5 two ends, and all power system constitutes seal force system on the whole, and acting in conjunction is on the center line of two templates, make template not reason be subjected to external force and produce distortion, guaranteed the locked mode precision; When moving back mould, hydraulic oil enters ante-chamber 107, because the external diameter of piston rod 2 is very big, the volume of annular ante-chamber 107 is also little, the low capacity oil pump still can make piston 104 do displacement backward fast, and this moment, the fluid of back cavity 106 and acceleration oil pocket 110 was then arranged to fuel tank, can finish fast and move back the mould action.

Claims

1. the clamping mechanism formed of an oil cylinder (1), piston rod (2), moving platen (3), fixed form (4) and pedestal (5); oil cylinder (1) is fixed on the pedestal (5) with fixed form (4); the center line of oil cylinder (1) is perpendicular to two shuttering work planes and be in the center of two templates, it is characterized in that:

A. establish a C shape connecting plate (6) respectively in the both sides of oil cylinder (1), C shape connecting plate (6) one ends are hinged with the back cylinder body (10) of oil cylinder (1) with axle (40), C shape connecting plate (6) other end is hinged with axle (40) and fixed form (4), the line of centres of C shape connecting plate (6) two ends pin joint and the centerline collineation of oil cylinder (1) and piston rod (2);

B. establish piston (104) and oil-deflecting rod (11) in the back cylinder body (10) of oil cylinder (1), piston (104) front end sets firmly piston rod (2), and piston rod (2) is affixed with preceding cylinder body (22), sets firmly moving platen (3) on the front end face of preceding cylinder body (22).

2. clamping mechanism according to claim 1; set firmly a gland (101) on the rear end back cylinder cover (103) of cylinder body (10) after it is characterized in that, two semi-rings (111) of gland (101) through being equipped in oil-deflecting rod (11) rear end annular groove press solidly oil-deflecting rod (11) on back cylinder cover (103).

3. clamping mechanism according to claim 1 and 2 is characterized in that gland (101) is inner and constitutes an annular seal space (102), and the interior acceleration oil pocket (110) of annular seal space (102) and oil-deflecting rod (11) is communicated with.

4. clamping mechanism according to claim 1 is characterized in that back cylinder body (10), back cylinder cover (103), piston (104) and cylinder cap (105) constitute the ante-chamber (107) and the back cavity (106) of the turnover work fluid of sealing respectively.

5. clamping mechanism according to claim 1 is characterized in that the front end of piston rod (2) is established cannelure, and card is established two semi-rings (21) of band through hole in the cannelure, and piston rod (2) is affixed by bolt that passes two semi-rings (21) through hole and front-bank rotor housing (22).

6. clamping mechanism according to claim 1 is characterized in that moving platen (3) both sides, lower end set firmly a footing (30) that is supported on base plane (51) respectively.