CN2169514Y - Hydraulic buffer for ball bearing outer ring groove grinder - Google Patents

Abstract

The utility model provides a hydraulic shock absorber, which is an important component of a groove grinder of the outer ring of a ball bearing. The utility model comprises a buffer body (4) which is fixed on the body of the grinder, buffer plungers (1) and (3) are arranged in the body of the buffer, a throttle body (2) is arranged between the two buffer plunger, and small holes are arranged on the throttle body (2) and are respectively communicated with the end surface of the buffer plunger and a low pressure oil source. The buffer plungers is pushed and moved as the same direction with the working table when the buffer plunger is bumped by the working table, an oil pad which is formed by hydraulic oil in the inner cavity of the buffer plunger, the damping action is formed by the low pressure oil is extruded through small holes on the throttle body (2), and the requirements of buffering, non ballistic and high precision of the finally resetting are achieved when the working table for a grinding frame is moved rapidly and is closed to an anchor point. Compared with the traditional throttle valve, the effect of braking buffering for presetting of the utility model can be unchanged, the precision of the resetting is high, the error is not exceed 2 mu m for more than hundreds time uses, and the effect of braking and buffering is variable under different working conditions.

Description

Hydraulic buffer for ball bearing outer ring groove grinder

The utility model relates to a kind of hydraulic bjuffer, and it is the vitals of ball bearing outer ring raceway groove grinding machine, the buffering when being used for deciding about emery wheel mill frame workbench journey and moving back and forth fast and finish the high position precision requirement.

At present, all adopt the hydraulic stroke choke valve of different structure to reach the purpose of buffering to the type grinding machine both at home and abroad, and can not finish the high position precision requirement.Because emery wheel mill frame workbench weight is bigger, about 800 kilograms, it is finished in second at every 2-3 and moves back and forth once, and traditional stroke throttle valve is in the unbalance loading pressured state again because diameter is less during work.Thereby under the unbalance loading component effect of frequent and enormous impact power, wearing and tearing will appear in the guiding valve in the stroke throttle valve in the short time, cause the choke valve internal leakage, when this leakage acquires a certain degree, its stroke throttling, deceleration buffer effect will be lost efficacy, as untimely reparation, owing to impact mill frame workbench repetitive positioning accuracy is obviously descended, and directly influence the work piece quality.

The purpose of this utility model is that a kind of novel high position precision, long hydraulic bjuffer of life-span will be provided.It reaches buffering in the time of can making mill frame workbench to anchor point, does not have and impact and the high purpose of repetitive positioning accuracy.

The purpose of this utility model is achieved in that left and right symmetrically is installed two buffer plungers, and a throttling bodies is housed between two buffer plungers, has little oilhole on the throttling bodies in buffering body centre, and this Kong Yuyi low pressure oil sources is connected.When the operation of mill frame workbench was bumped against with buffer plunger, plunger was pushed, and when it moves, the low pressure oil in the buffering body is extruded by the aperture in the throttling bodies, flows to the low pressure oil sources.Because low pressure oil adds the damping action of aperture to the active force of plunger end face, thereby cause headstock working table movement to slow down, and reach the purpose of buffering.

Characteristics of the present utility model are:

1) this buffer uses through long-term, and the braking buffering effect that mixes up in advance can not change.Because of 1. and 3. its plunger is subjected to force direction reasonable, can not produce unbalance loading, favourable prolongation plunger service life,, and the two seals protection is arranged because plunger guide is long even produce wearing and tearing, only can produce the external leakage of a small amount of.Because the aperture that 2. throttling bodies is gone up is not easy to wear, the aperture is constant substantially, so a small amount of that plunger produces leaks minimum to the braking buffering effect influence that mixes up in advance.Thereby can satisfy the high-precision requirement of mill frame workbench side-to-side movement anchor point resetting reliably, more than hundred times, error is no more than 2 μ m, can guarantee the high-quality and the crushing quality of work piece.

2) the braking buffering effect of this buffer is adjustable at random under the different operating condition.Throttling bodies 2. with the buffering body 4. between with being threaded, easy accessibility under the different operating condition, can change throttling bodies and 2. go up the size of hole diameter or change input pressure by test, brakes buffering effect in the hope of obtaining the best.

1. and 3. 3) cause when leaking outside when plunger produces wearing and tearing, can be resolved easily by changing sealing ring.

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

Fig. 1 is the profile according to the hydraulic bjuffer of the ball bearing outer ring raceway groove grinding machine that the utility model proposes.Describe details and working condition in detail below in conjunction with Fig. 1 according to the concrete device that the utility model proposes.

4. this buffer comprises a buffering body, the buffering body is fixed on the grinder bed, position one mill frame workbench is done reciprocating centre, the left and right sides, in the buffering body, 1. and 3. left and right symmetrically is equipped with buffer plunger, at buffer plunger 1. and be equipped with a throttling bodies 3. 2., have in the throttling bodies one with plunger 1. and 3. concentric horizontal apertures, the size of aperture is preferably

0.5-

1.2mm, the aperture two ends respectively be in the buffering body 4. inner chamber plunger 1. and end face 3. communicate.Buffering body centre 4. has a vertical oilhole 2. to communicate with throttling bodies.This vertical oilhole is connected with a low pressure oil sources again, thus the low pressure oil all-the-time stable act on buffer plunger 1. and on the end face 3., the pressure of low pressure oil preferably is controlled at 0.6-1.0MPa.If the mill pallet is quick right lateral under the effect of hydraulic oil, collision block on being fixed on workbench knocks plunger 1. during the left side, because workbench cylinder pressure height and effective active area are big, the thrust that is produced acts on the 1. power on the right side of buffer plunger greater than low pressure oil.Though the formed lubricating pad of low pressure oil has buffering and reduces the effect of thrust, can not stop plunger continuation right lateral 1..Like this, with regard to force plunger 1. the aperture 2. gone up by throttling bodies of the low pressure oil of the right in the chamber be extruded.Because the hole is little, low pressure oil can not be discharged rapidly, thereby the workbench of quick right lateral is obstructed and slows down, and has played braking and buffering effect.1. pushed up from plunger, to microinching on earth, 4. contact with the buffering body on being fixed on lathe bed, just finished the high position precision requirement of crushing position, equally, 3. reach throttling bodies at buffer plunger and 2. go up under the acting in conjunction of little oilhole, can finish the buffering location of mill frame workbench left lateral, to guarantee the centering at formed grinding wheel and trimmer garden arc finishing center.

Claims (1)

1, is used for the hydraulic bjuffer that ball bearing outer ring raceway groove grinding machine mill frame workbench is back and forth decided journey, rapid movement, this hydraulic bjuffer has a hydraulic restriction, it is characterized in that, the buffering body 4. in left and right symmetrically 1. and 3. buffer plunger is housed, be equipped with a throttling bodies between two plungers 2., have in the throttling bodies one with plunger 1. and 3. concentric horizontal apertures, its end face with two plungers communicates, buffering body centre 4., there is an oilhole 2. to communicate, and is connected with a low pressure oil sources with throttling bodies.

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