CN2164337Y

CN2164337Y - Hydraulic clamping means

Info

Publication number: CN2164337Y
Application number: CN 93216935
Authority: CN
Inventors: 陈省
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-02
Filing date: 1993-07-02
Publication date: 1994-05-11
Anticipated expiration: 2003-07-02

Abstract

The utility model discloses a modular empty oil pressure clamping means which is mainly composed of a cylinder body, a bottom plug, a corner guide rod with an S-shaped guide groove which is arranged on the corresponding part of the rod face and can be used to guide a piston rod to rise and fall and make the piston rod turn, the piston rod, a dual-guide post, a keep plate, an O-shaped ring and an oil seal which are used to seal up empty oil pressure, steady braces and special bolts. The utility model is mainly characterized in that the dual-guide post guides make turning and make rising and falling actions in the S-shaped guide groove of the corner guide rod, and the piston rod and the keep plate can be driven to synchronously carry out angle rotation and rising and falling actions along with the dual-guide post so the function of clamping or loosing workpieces can be achieved. Die set elements can be replaced conveniently, and thus, the utility model has the advantages of wear resistance, long service life and wide range of use.

Description

Hydraulic clamping means

This practicality is analysed type and is related to a kind of anchor clamps, relates in particular to a kind of modularity Null oil-pressure anchor clamps.

Anchor clamps are to be an obligato inscape for automation, all workpiece need Precision Machining, and when requiring a large amount of automation, then not having anchor clamps is impossible realize, general oil pressure anchor clamps use the bigger chucking power of needs (for example: the machine components manufacture field), the pneumatics anchor clamps use at the less chucking power of needs (for example electronic component manufacture field), the Null oil-pressure anchor clamps then the boundary between the two, it can widely collect both advantages, so its utilization scope is more and more wide.

But with regard to existing Null oil-pressure anchor clamps, because and itself structure and imperfection, so itself intensity no matter all can't satisfy people's requirement in wear-resistant ability or service life.A kind of Null oil-pressure anchor clamps are for example arranged, and it mainly utilizes steel ball to roll guiding in guide groove and reaches the purpose of the corner of certain angle, because when steel ball is stressed, be a way of contact with the inner face of guide groove, therefore make the position of contact bear great strength, thus wearing and tearing caused easily in using, even can take place stuck, and cause whole guide groove to be subjected to great torsion and produce twisting off, and with steel ball as guide mode, the precision of steel ball needs strict control, this just brings complexity to manufacturing; The another kind of Null oil-pressure anchor clamps that guide the piston motion with single guide pillar, because of it is single guide pillar, and in the middle of its guide pillar is hollow, it is cut with guide groove by correspondence on the guide rod, the piston that guide pillar is run through and the guide groove of guide rod guide its motion, so on single guide pillar, born the torsion of two guide grooves, so not only reduced the shear stress that bears, and the hollow structure of guide pillar also makes its intensity difference; Moreover the machining tolerance of two guide grooves, as control badly, motion has some setbacks, stuck phenomenon and can produce in the high-speed motion, so higher to the requirement on machining accuracy of guide groove, make make complicated; In addition, existing Null oil-pressure anchor clamps are to be connected with welding manner because of guide rod and pedestal, so be impossible when being fit to different operating modes and changing guide rod.

The purpose of this utility model is to design a kind of simple in structure, convenient, high, the anti abrasive modularity Null oil-pressure of intensity anchor clamps of loading and unloading, to enhance productivity and the needs that satisfy different operating modes.

The purpose of this utility model is achieved in that this modularity Null oil-pressure anchor clamps are by cylinder body, bottom plug, piston, piston rod, pressing plate, the corner guide rod, guide pillar and the O type ring oil sealing and the steady pin that are used to seal, connectors such as bolt are formed, bottom plug wherein, piston rod, piston is arranged in the cylinder body in proper order, pressing plate is linked to the piston rod top, piston rod heart among the piston, the corner guide rod is arranged in the centre bore of bottom plug and piston rod, the corner guide rod is provided with S shape guide groove, it is characterized in that guide pillar is two guide pillars of an entity, be provided with a large-diameter portion in the bottom of piston rod, on the side face of this large-diameter portion, offer a pair of through hole in pairs, two guide pillars are arranged at this respectively in the through hole, and an end of guide pillar places in the guide groove of corner guide rod, be provided with a pair of through hole in the bottom of corner guide rod, it is corresponding with set a pair of through hole on the bottom plug outer peripheral face, and the corner guide rod unit that corner guide rod and bottom plug is combined into one by steady pin, be provided with conical bore at the bottom plug outer peripheral face, it is corresponding with the through hole that is provided with on the cylinder base outer peripheral face, is screwed into this through hole and conical bore is connected cylinder body and corner guide rod unit by special screw.

When the group mode Null oil-pressure anchor clamps of said structure use, Null oil-pressure enters in the cylinder body through the overhead oil pressure hole of cylinder body, effect moves upward piston by pressure, drive two guide pillars simultaneously and rise and corner, and drive on the corner limit, pressing plate limit that piston rod and piston rod be connected as a body and rise along the S of guide rod shape guide groove; With should the piston unit pressurized and when descending, two guide pillars be also along with decline, and the limit trailing edge rotates along the S of corner guide rod shape guide groove, even also piston rod and pressing plate rotation descend and press down, reach the purpose of holding workpiece by this.This structure adopts two guide pillar structures because of the some contact of cancellation ball, so all more traditional single guide pillar or the ball of its torsion that bears and stress is all good, and the full Zhi Shixin of guide rod, intensity is also strengthened greatly, and thus, the not genial stuck phenomenon of motion that its high-speed motion produces is also just avoided; All adopted cooperating of special bolts and conical bore because of cylinder body and bottom plug portion and piston and piston rod part in addition, so when special bolts in the hole during packing, because there is the structure of specific drop (Δ X) and circular cone at its center, make it that effect that produces packing and location can be arranged with causing soon.And when it changes because of the behaviour in service different needs, only need to change the corner guide rod of different rotary track (45 °, 60 °, 90 °), just can change the start track of cylinder pressure, and dismounting is also very convenient with different with the replacing corner guide rods with special bolts of device steady pin, thereby the user can be provided more elasticity when using.

Come structure of the present utility model is further narrated with drawings and Examples below.

Description of drawings:

Fig. 1 is the package assembly schematic diagram of the utility model embodiment 1;

Fig. 2 is the three-dimensional exploded view of Fig. 1;

Fig. 3 is the lucky structure schematic diagram of the assembling of the utility model embodiment 2;

Fig. 4 is the three-dimensional exploded view of Fig. 3;

Fig. 5 is special screw and the conical bore mated condition schematic diagram that is positioned at bottom plug with 60 ° of conical configuration of two tip tools.

Embodiment 1 shown in Fig. 1,2 is movable pressing board formula mould resistanceization Null oil-pressure anchor clamps.

By diagram as seen, it is made of institutes such as cylinder body 1, movable pressing board 6, piston rod 3, guide pillar 9, corner guide rod 5, bottom plugs 4.

The corner guide rod unit that cylinder body 1 is used to accommodate piston 2, the piston rod 3 that is connected with piston 2 centre bores, is made of corner guide rod 5 and bottom plug 4, one end of piston rod 3 passes cylinder body, and link a pressing plate 6 on its top, four jiaos of 101 respectively are provided with an installing hole 102 on cylinder body 1 base, be provided with device and bottom plug is connected with the through hole 104 of screw 10 in base side 103, be provided with Null oil-pressure entry and exit 106 in base another side 105, in cylinder body 1 upper hole, be provided with the chase 107 of placing oil sealing 17;

Piston rod 3 one ends run through fixing hole 301 by steady pin 8 and combine with movable pressing board 6, the piston rod other end inserts in the piston, and its bottom is large-diameter portion 302, on the outer peripheral face of large-diameter portion, be provided with a pair of through hole 3026 that runs through for guide pillar 9 to the position relatively, be provided with in the large-diameter portion bottom surface with the through hole axle center perpendicular be used for the fixedly screw 302C of the bolt 12 of guide pillar 9 usefulness of device, end face at large-diameter portion is provided with the chase 302a that places O type sealing ring 15, is provided with the hole 303 of device corner guide rod 5 at the underpart of the piston rod center;

Bottom plug 4, its central authorities are provided with the hole 401 of placement corner guide rod 5 and the groove 402 of O type ring 13, be provided with the annular concave ditch 403a that places sealing O type ring 14 at its bottom outer peripheral face 403, with the conical bore 403b that is used for device special screw 10, the position of this conical bore is corresponding with through hole 104 positions of cylinder body 1 base side;

Corner guide rod 5 its cylindrical shape side faces that are arranged in the piston rod hole are provided with a pair of S shape guide groove 501, this pair guide groove matches with two guide pillars 9, guide rod 5 bottoms are provided with the fixedly through hole 502 of the steady pin 7 of usefulness of device bottom plug 4, and corner guide rod 5 integrally combines with bottom plug 4 and promptly constitutes corner guide rod unit.

Present embodiment borrow oil pressure to promote to make the corner of two guide pillars 9 S shape guide groove 501 in, lifting and make piston unit and the pressing plate corner that is connected, on fall, promote piston decline with oil pressure again, pressing plate is clamped workpiece.

Fig. 3,4 is depicted as fixation clip formula Null oil-pressure anchor clamps, these anchor clamps are except piston rod 3 tops and fixation clip structure change slightly, all the other and embodiment 1 full door mutually, the structure of movable pressing board is to offer a hole 601 in the middle of the pressing plate 6, and piston rod 3 inserts in this hole and screws togather a steady pin 8 by the screw 301a that the piston rod top is offered movable pressing board 6 and piston rod 3 are connected as a single entity.

The structure of fixation clip is that pressing plate 6a and piston rod 3a directly connect to one with bolt 8a.

Above-mentioned two embodiment, when cylinder body was major diameter more than the 50mm, at the nested piston 2 of the large-diameter portion 302 of piston rod, its side face was provided with the chase 201 of nested oil sealing 16 usefulness and the conical bore 202 that is screwed into for special bolts 11.

Special bolts 10 is the bolt that its tip has 60 ° of coning angles in above-mentioned as seen from Figure 5, so when it cooperates with the conical bore 403b of bottom plug 4, when the inside packing of bolt 10, because there are specific drop (Δ X) and conical configuration in its center, make bottom plug and cylinder body can reach the effect of packing and location, thereby solve the speed location when making the assembling of these anchor clamps, present tight purpose fast.Same special bolts 11 with the cooperating of conical bore 202 of piston 2 also can make piston 2 and piston rod 3 produce packing fast and effectively and location.

The utility model is being applied in clamping when more not having the workpiece of rigidity, take place cross force to make workpiece produce deflection during for fear of clamping and influence the disadvantage of machining accuracy, can adopt the structure of the auxiliary fulcrum of reinforcement commonly used, so that the strength during clamping disperses, multi-point average bears and does not produce deflection.

In addition, in order to adapt to the needs of different operating modes, in the utility model, corner guide rod 5 lip-deep S shape guide groove rotational trajectories can be designed to 45 °, 60 °, 90 ° etc. multiple, change the start track of pressing plate with this, satisfy different use needs and reach.

Claims

1, modularity Null oil-pressure anchor clamps are by cylinder body, bottom plug, piston, piston rod, pressing plate, the corner guide rod, guide pillar and the O type ring oil sealing and the steady pin that are used to seal, connectors such as bolt are formed, bottom plug wherein, piston rod, piston is arranged in the cylinder body in proper order, pressing plate is linked to the piston rod top, piston rod heart among the piston, the corner guide rod is arranged in the centre bore of bottom plug and piston rod, the corner guide rod is provided with S shape guide groove, it is characterized in that guide pillar is two guide pillars of an entity, be provided with a large-diameter portion in the bottom of piston rod, on the side face of this large-diameter portion, offer a pair of through hole in pairs, two guide pillars are arranged at this respectively in the through hole, and an end of guide pillar places in the guide groove of corner guide rod, be provided with a pair of through hole in the bottom of corner guide rod, it is corresponding with set a pair of through hole on the bottom plug outer peripheral face, and the corner guide rod unit that corner guide rod and bottom plug is combined into one by the steady pin that is arranged in these two pairs of holes, be provided with conical bore at the bottom plug outer peripheral face, it is corresponding with the through hole that is provided with on the cylinder base outer peripheral face, is screwed into this through hole and conical bore is connected cylinder body and corner guide rod unit by special screw.

2, modularity Null oil-pressure anchor clamps as claimed in claim 1, the outer peripheral face that it is characterized in that piston is provided with the chase of placing oil sealing and offers at least two conical bores, the through hole of the two guide pillars of the placement of offering on the side face of the large-diameter portion of this conical bore and piston rod is corresponding, and is screwed into special bolts piston and piston rod are connected.

3, by the described modularity Null oil-pressure of claim 1 anchor clamps, it is characterized in that described special bolts is the conical bolt that a front end has 60 ° of inclinations angle.

4, by the described modularity Null oil-pressure of claim 2 anchor clamps, it is characterized in that described special bolts is the conical bolt that a front end has 60 ° of inclinations angle.

5, by the described modularity Null oil-pressure of claim 1 anchor clamps, its feature is provided with the axis screw in vertical direction, that be used for fixing two guide pillars of 2 through holes of going up therewith on the large-diameter portion of piston rod.

6, by the described modularity Null oil-pressure of claim 1 anchor clamps, it is characterized in that being provided with auxiliary fulcrum in parallel fixture near axis position.

7, by the described modularity Null oil-pressure of claim 1 anchor clamps, it is characterized in that its rotational trajectory of S shape guide groove on the corner guide rod is 45 °, 60 ° or 90 °.