CN209350069U

CN209350069U - A kind of high-precision hydraulic centering center rest

Info

Publication number: CN209350069U
Application number: CN201822018004.9U
Authority: CN
Inventors: 陈卓
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-03
Filing date: 2018-12-03
Publication date: 2019-09-06
Anticipated expiration: 2028-12-03

Abstract

The utility model relates to a kind of high-precision hydraulic centering center rests, it includes upper housing, lower case, hydraulic cylinder, middle push rod, two bearings, two rotation clamping bars, three locating pieces, four selfs positioning pin and several screws and pin standard component and two return are buckled, wherein, the piston rod of the middle push rod and the hydraulic cylinder is arranged in parallel, when the external hydraulic masterpiece used time, it is for linear motion that the piston rod of the hydraulic cylinder will drive the middle push rod, by two bearings, the two rotation clamping bars and three locating pieces transmit power, the surface of final three locating piece clamp cylinders shape workpiece together, and the positioning surface of three locating pieces is all plane, by accurately designing, under the driving of the hydraulic cylinder, the final all lucky clamp cylinders shape workpiece surface of the positioning surface of three locating pieces, and with processing Constantly becoming smaller and constantly clamp for middle cylindrical surface, keeps to automatic, high precision cylindrical work center constant.

Description

A kind of high-precision hydraulic centering center rest

Technical field

The utility model relates to centre frame fields, and in particular to for a kind of high-precision above grinding machine or other lathes Hydraulic self-centering centre frame.

Background technique

Conventional center frame is usually two o'clock or multi-point support, manually adjusts each support rod by skilled worker, in the hope of Achieve the purpose that frame center line is coaxial end to end for clamped workpiece and lathe.This precision manually adjusted is often depending on technology The subjective factors such as the feel and experience of worker, the absolute fix precision of single adjusting and the repetitive positioning accuracy repeatedly adjusted are all Very low and time-consuming also very long, so conventional center frame is increasingly not suitable for, modern machine is efficient, high-precision requirement.

Thus, it is necessary to design a kind of high-precision hydraulic centering center rest, add needed for efficient, high-precision holding workpiece From clamping, into completion of processing whole process, frame center line is coaxial end to end with lathe at the center of the Ministry of worker point.

Summary of the invention

The utility model relates to a kind of high-precision hydraulic centering center rest, it is characterised in that: it include upper housing, under Shell, hydraulic cylinder, middle push rod, two bearings, two rotation clamping bars, three locating pieces, four selfs positioning pin and several screws and Pin standard component and two return are buckled, wherein the upper housing and the lower case 12 screw standard parts and 4 institutes It states pin standard component and links together and constitute shell, the hydraulic cylinder is assemblied in the shell by 4 screw standard parts On body, the piston rod of the middle push rod and the hydraulic cylinder is arranged in parallel, and one end of the middle push rod and the hydraulic oil The piston rod of cylinder is fixed by a pin standard component, and the other end is fixedly installed with centainly with two screw standard parts Position block, and two bearings are installed by two self-control positioning pins on the middle push rod, and two rotating clamps Tight bar is installed on the shell by two self-control positioning pins, and respectively with an institute on two rotation clamping bars It states screw standard part and is fixedly installed with the locating piece, and two backhaul button one end pass through kidney slot thereon by 2 A pin standard component is connected on two rotation clamping bars, and the other end is then by fixing two bearings Two self-control positioning pins are assemblied on the middle push rod, thus, it could be seen that the piston rod of the oil cylinder and the middle push rod, two The fixed locating piece and two backhaul buttons are fixed together on a bearing, the middle push rod, due to The place that two rotation clamping bars are connect with two backhaul buttons is the structure of a kidney slot, therefore in no external force When effect, two backhaul buttons can't work as to the effect of two rotation clamping bar transmission forces by outer liquid pressure Effect, when the piston rod of the hydraulic cylinder is for linear motion, it is for linear motion together to will drive the middle push rod, final described Two bearings installed on middle push rod can contact respectively with two rotation clamping bars, and then two rotations clamp Under bar is pushed in two bearings, two self-control positioning pins on the shell rotate, and drive respectively solid The two locating pieces rotation being scheduled on two rotation clamping bars, finally fills on this two described locating pieces and the middle push rod The surface of that matched locating piece clamp cylinders shape workpiece together, and the positioning working face of three locating pieces is all flat Face may be implemented under the driving of the hydraulic cylinder, the positioning plane of these three locating pieces is most by accurately designing The surface of whole clamp cylinders shape workpiece eventually, and it is continuous with constantly becoming smaller for cylindrical surface in process It clamps, keeps to automatic, high precision cylindrical work center constant.

In addition, have threaded hole that can install close to switch on the shell, it is described close to switch connection external electrical control System, thus external electrical control system to a kind of course of work of high-precision hydraulic centering center rest may be implemented from Dynamic control.

In addition, being equipped with gas nozzle on the shell, the gas nozzle can be generated external high pressure gas source by connecting tracheae High pressure gas be input to the enclosure interior, so as to avoid a kind of high-precision hydraulic centering center rest worked Cheng Zhong, external moisture and metal fragment enter the enclosure interior, finally protect the self-centering center of a kind of high-precision hydraulic Frame is from corroding, wearing.

Change in addition, working as outer liquid pressure direction suffered by the hydraulic cylinder and its piston rod reverse linear moved, When driving the middle push rod counter motion, the kidney-shaped pore structure of the two backhaul button of the middle push rod by assembly on it Transmission force finally will pull two rotation clamping bars and rotate backward, thus fix on two rotation clamping bars two A locating piece can rotate backward simultaneously, folded by that fixed described locating piece unclamps together on the final and middle push rod Hold workpiece.

In addition, in order to avoid a kind of high-precision hydraulic centering center rest is in clamping workpiece process, contact To grinding wheel etc process tool and damage, the platform that boundary is circular arc or other suitable shapes can be machined on the shell Rank.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of high-precision hydraulic centering center rest provided by the utility model.In this figure, respectively The part that a serial number represents are as follows:

1- hydraulic cylinder, the piston rod of 2- hydraulic cylinder, push rod in 3-, 4- lower case, 5- make positioning pin by oneself, 6- bearing, 7- gas nozzle, 8- rotation clamping bar, 9- self-control positioning pin, 10- locating piece, 11- locating piece, 12- locating piece, 13- make positioning pin by oneself, 14- rotates clamping bar, 15- bearing, and 16- makes positioning pin, the close switch (signal) of 17- by oneself.

Fig. 2, Fig. 3, Fig. 4 are that the high-precision hydraulic of one of model selected to describe the utility model is self-centering The clamping process schematic diagram of centre frame.Because 3 figures thus are the sectional views for illustrating the utility model to clamp workpiece fabrication, so All it is not drawn into backhaul button.

The part that serial number 1 and 2 represents in Fig. 5 is that backhaul is buckled, this figure also simply illustrates the working condition of backhaul button.

Fig. 1-5 is obtained after a kind of high-precision hydraulic centering center rest of model removes its upper housing.

The part that serial number 1 represents in Fig. 6 is upper housing.

Fig. 6 is the schematic diagram of the step in order to adapt to particular job situation, processed on the utility model shell.Fig. 6 Only show that upper housing processes step, and if actual conditions need, lower case can also process the step of respective shapes.

Fig. 7 is the cross-sectional view for illustrating the standard component of connection, fixed each components.Serial number 1 is that fixation is described hydraulic The screw standard part of oil cylinder and the shell, totally 4；Serial number 2, serial number 6 are the screw standard part of the fixed upper and lower casing, Respectively 12,4；Serial number 5 positions the pin standard component of the upper and lower casing when being assembly, and totally 4；Serial number 3 is fixed institute State the piston rod of hydraulic cylinder and the pin standard component of the middle push rod, 1；Serial number 4 be 2 rotation clamping bars of connection with The pin standard component of 2 backhaul buttons, totally 2；Serial number 7 is the screw of the fixed middle push rod and the locating piece thereon Standard component, totally 2；Serial number 8 is to fix 2 rotation clamping bars and the thereon screw standard part of 2 locating pieces, totally 2 It is a.

Fig. 8 is and certain hydraulic self-centering centre frame for being used to compare to describe the practicability of the utility model, novelty The schematic diagram of (being indicated below with " A centre frame ").Code name 1 and 3 is clamp arm in figure, and code name 2 is cylindrical workpiece, the center A The clamp arm 1,3 of frame is assembled together by positioning pin and a cylindrical locating piece respectively.At work, the two are cylindrical Locating piece clamps workpiece under the promotion of hydraulic coupling, and working face is cylinder, and the contact of final and workpiece is a line.But Be, due to assembling and manufacturing bring error, it is easy to so that actually with workpiece contact be not design upper theory should That line of contact, along with the fit-up gap between positioning pin and locating piece, the error of positioning is just bigger.That is, Actually A centre frame and the line of workpiece contact be often in the front or behind of that theoretical line, and due to its be unable to from I corrects, so that its self centering precision is relatively low.And the utility model does not have such case, 3 locating pieces and rotation Clamping bar, middle push rod are fixed by screw, and gap is not present, although itself and workpiece contact and straight line, it is connect Contacting surface is plane, that is to say, that, also can gradually self-recision is and final to correct position during subsequent processing even if there is error 3 locating pieces can all touch workpiece.In fact, as long as there is 2 locating pieces to clamp workpiece, the center line of workpiece is fixed on one In constant axis, and in process as workpiece becomes closer to ideal cylinder, final three locating pieces can and work Part contact, and work centre line is kept to be permanently affixed on this axis.Therefore it is compared with A centre frame, the utility model tool Have that error is smaller, the higher feature of positioning accuracy.

Specific embodiment

Because the utility model represents the high-precision hydraulic centering center rest of many models, the high-precision liquid of every kind of model Press centering center rest clamping workpiece diameter range it is different, cannot all describe one by one, thus only with Fig. 2, Fig. 3, A kind of high-precision hydraulic centering center rest of model shown in Fig. 4 describes this reality to represent all models of the utility model With novel working principle.

It can see from Fig. 2, Fig. 3, Fig. 4, as the cylindrical surface that the circle that double dot dash line is drawn in figure represents exists Constantly become smaller in process, under external action of hydraulic force, the piston rod of the hydraulic cylinder drives the middle push rod straight line Movement, the middle push rod pass through two be fixed thereon the bearing and push two rotation clamping bar rotations, two institutes Totally three locating pieces stated on rotation clamping bar and the middle push rod simultaneously clamp on workpiece.In the whole process, this is practical Working face on three novel locating pieces retaining clip clamping of workpieces always, and guarantee the center location of workpiece not Become, this is that accurate design method is guaranteed, this working face one from three locating pieces in Fig. 2, Fig. 3, Fig. 4 The circle directly drawn with the double dot dash line is tangent, meanwhile, two bearings on the middle push rod in this three figure and two Rotation clamping bar difference is tangent, and the workpiece centre that represents of the circle drawn of the double dot dash line apart from high-precision hydraulic from The relative position of open type self-centering center rest never change can prove (in three figures size 68 never change, certainly for Different model, this size are different).

As seen from Figure 5:

The outer liquid pressure direction suffered by the hydraulic cylinder changes and its piston rod reverse linear is moved, thus band When moving the middle push rod counter motion, the middle push rod passes through the kidney-shaped pore structure transmitting for two backhaul buttons being fixed thereon Power finally will pull two rotation clamping bars and rotate backward, thus two institutes fixed on two rotation clamping bars Stating locating piece can rotate backward, and the fixed locating piece unclamps clamped workpiece together on the final and middle push rod.

Boundary in Fig. 6 on the utility model shell is that the purpose of circular arc or the step of other suitable shapes is in order to prevent In some special cases, when the utility model clamping workpiece works, the cutters such as grinding wheel are touched because shell is too wide, thus The utility model is caused to be damaged.In special circumstances, the utility model shell upper and lower surface can process such step, Er Feite It does not need to process such step in different situation.

It is sub that the above is only the preferred embodiment of the present invention, rather than for limiting the utility model, it is all Any modifications, equivalent replacements, and improvements made within spirit of the present utility model and principle etc. should be included in practical Within novel protection scope.

Claims

1. a kind of high-precision hydraulic centering center rest, it is characterised in that: it include upper housing, lower case, hydraulic cylinder, in push away Bar, two bearings, two rotate clamping bars, three locating pieces, four selfs positioning pin and several screws and pin standard component and two times Journey button, wherein the upper housing and 12 screw standard parts of the lower case and 4 pin standard components are connected to Shell is constituted together, and the hydraulic cylinder is assembled on the housing by 4 screw standard parts, the middle push rod and institute The piston rod for stating hydraulic cylinder is arranged in parallel, and the piston rod of one end of the middle push rod and the hydraulic cylinder passes through an institute It states pin standard component to fix, the other end is fixedly installed with a positioning block with two screw standard parts, and on the middle push rod Two bearings are installed by two self-control positioning pins, and two rotation clamping bars pass through two self-controls Positioning pin is installed on the shell, and is fixedly mounted respectively with a screw standard part on two rotation clamping bars There is the locating piece, and two backhaul button one end are distinguished by kidney slot thereon by two pin standard components It is connected on two rotation clamping bars, the other end is then filled by fixing two self-control positioning pins of two bearings It fits on the middle push rod.

2. a kind of high-precision hydraulic centering center rest according to claim 1, it is characterised in that: have spiral shell on the shell Pit is installed in threaded hole close to switch, described close to switch connection external electrical control system.

3. a kind of high-precision hydraulic centering center rest according to claim 1, it is characterised in that: installed on the shell There is gas nozzle, the high pressure gas that external high pressure gas source generates is input to the enclosure interior by connection tracheae by the gas nozzle.

4. a kind of high-precision hydraulic centering center rest according to claim 1, it is characterised in that: processed on the shell Having boundary is the step of circular shape.