CN202344350U

CN202344350U - Travel braked hydraulic operation box

Info

Publication number: CN202344350U
Application number: CN2011204328996U
Authority: CN
Inventors: 范文豹
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-04
Filing date: 2011-11-04
Publication date: 2012-07-25
Anticipated expiration: 2021-11-04

Abstract

The utility model discloses a travel braked hydraulic operation box which comprises a valve body, a reversing valve and a pilot valve, wherein an opening n is arranged at the left end of a hole in which the pilot is installed in the valve body; an opening m is arranged at the right; the opening n is communicated with the left end of the hole of the reversing valve by a left one way valve and a left throttling valve connected in parallel; the opening m is communicated with the right end of the hole of the reversing valve by a right one way valve and a right throttling valve connected in parallel; a worktable moves leftwards; a baffle block pushes a pull rod to firstly push the pilot valve leftwards; a braking cone gradually closes an oil return opening to reduce the speed of the worktable with the leftward movement; the oil return opening is opened when the braking cone is about 0.2 mm away from the position where the opening of the pilot valve is closed; the oil on the left end of the reversing valve flows back to an oil tank via the oil return opening so that the oil pressure at the left end of the reversing valve is reduced; and the pressure oil at the right end pushes the reversing valve to move leftwards. As the reversing valve of the improved operation box has constant speed, so the operation box has the characteristics of high reversion precision, more stable reversion, easiness for manufacturing, and low manufacturing cost.

Description

A kind of hydraulic cabinet of stroke braking

Technical field

The utility model belongs to the cylindrical grinder technical field, is specifically related to the hydraulic cabinet of the stroke braking that a kind of cylindrical grinder uses.

Background technology

The problem that the operation panel of the stroke braking that present cylindrical grinder is used exists is: the friction speed difference of switching-over precision is big; The cylindrical grinder standard code; Only in the velocity shooting of 0.5-2m/min, check; Franchise is also only stipulated 0.2mm, and the existing operation panel that requires that comes to this also is difficult to reach, and reprocess at the general assembly scene through being everlasting.This is because existing operation panel, when the workbench high-speed cruising, is that the drag cone at pilot valve middle part is closed oil return line and workbench is stopped and being commutated; When the workbench low cruise, be that reversal valve passes through for the first time fast the jumping, get the jump on and closed oil return line before the pilot valve and workbench is stopped and commutating, caused the workbench high, low speed to stop and having commutated in different positions, it is poor that this has just formed friction speed.

Summary of the invention

In order to overcome the deficiency of above-mentioned prior art, the purpose of the utility model is to provide a kind of hydraulic cabinet to the journey braking, and the hydraulic cabinet that makes the journey braking is than existing operation panel, and the switching-over precision is higher, and it is more steady to commutate, and manufacture difficulty reduces greatly.

To achieve these goals; The technical scheme that the utility model adopts is: a kind of hydraulic cabinet of stroke braking; Include valve body, reversal valve, pilot valve, the left end in the hole of dress pilot valve is provided with the n mouth in the valve body, and the right is provided with the m mouth; The n mouth is connected with the left end of switching-over valve opening through the left check valve and the left choke valve of parallel connection, and the m mouth is connected with the right-hand member of switching-over valve opening through the right check valve and the right choke valve of parallel connection.

The beneficial effect of the utility model is:

Compare with the operation panel that existing stroke is braked, about fast hole and groove cancel all of jumping, respectively there are a check valve and a choke valve parallel connection in two ends in the existing reversal valve; Lead to the n mouth and the m mouth of pilot valve respectively, the reversal valve of operation panel has not had fast jumping like this, and the speed of 5mm is just slow much before the reversal valve; The time of reversal valve close port just postpones greatly; He has been lost get the jump on the possibility of closing oil return line before the pilot valve, this has just guaranteed under any speed, all has been to be closed oil return and workbench is stopped by the drag cone in pilot valve stage casing; High, low speed all can stop and commutating at same position like this, and it is poor just can not friction speed to occur naturally.The fast jumping of cancellation reversal valve can also reduce the manufacture difficulty of operation panel, reduces production costs.

Description of drawings

Fig. 1 is the loop diagram of the utility model.

Fig. 2 is the structural representation of the reversal valve 5 of the utility model.

Fig. 3 is the structural representation of the pilot valve 1 of the utility model.

The specific embodiment

Below in conjunction with accompanying drawing the structural principle and the operation principle of the utility model are done further explain.

Referring to Fig. 1,2,3, a kind of hydraulic cabinet of stroke braking includes valve body 14, reversal valve 5 and pilot valve 1 and forms, the drag cone 2 that is provided with in the pilot valve 1, and the left end in the hole of dress pilot valve 1 is provided with n mouth 3 in the valve body 14, and right-hand member is provided with m mouth 4; Cancelled in original reversal valve 5 about fast hole and groove of jumping function; Have only two ends that a check valve and a choke valve parallel connection are respectively arranged; Be that reversal valve 5 left ends are connected with left check valve 6, left choke valve 7; Right-hand member is connected with right check valve 8, right choke valve 9, and left check valve 6, left choke valve 7 are connected with n mouth 3, and right check valve 8, right choke valve 9 are connected with m mouth 4.When workbench 10 to left movement, the block 11 of workbench 10 pushes away the top of driving lever 12 to the right in the time will commutating, the bottom of driving lever 12 pushes away pilot valve 1 left; The drag cone of keeping right in pilot valve 1 middle part 2 makes the workbench reduction of speed along with progressively closing oil return opening to left movement, and when closing from pilot valve 1 valve port when also having about 0.2mm, the oil return opening 13 of pilot valve 1 high order end control reversal valve 5 motions is opened; The oil of reversal valve 5 left ends is through left choke valve 6, and n mouth 3 gets into pilot valve 1 and flows back to fuel tank from oil return opening 13, causes reversal valve 5 left end oil pressures to reduce; The pressure oil of right-hand member promotes reversal valve 5 to begin to left movement; Because the speed of the reversal valve 5 of the operation panel after improving is at the uniform velocity, not fast the jumping, so the speed of 5mm is just slow relatively much before the reversal valve 5; The time of reversal valve 5 close port just postpones greatly; This also is to be closed oil return and workbench is stopped by pilot valve 1 with regard to having guaranteed when the low speed, and high, low speed all can stop and commutating at same position like this, just the friction speed difference can not occur naturally.

After by the utility model operation panel being changed a social system, it is steady to commutate, and the switching-over precision is improved from principle, and the friction speed difference has not had, and structure has been simplified on the contrary, and manufacturing cost reduces again greatly.Though it is many that the translational speed of the preceding 5mm of reversal valve has reduced, speed has afterwards been accelerated again relatively, and do not extend total commutating period.

Claims

1. the hydraulic cabinet of stroke braking; Include valve body (14), reversal valve (5), pilot valve (1); It is characterized in that the left end that valve body (14) is gone up the hole of dress pilot valve (1) is provided with n mouth (3), right-hand member is provided with m mouth (4); N mouth (3) is connected with the hole left end of dress reversal valve (5) through left check valve (6), the left choke valve (7) of parallel connection, and m mouth (4) is connected with the hole right-hand member of dress reversal valve (5) through right check valve (8), the right choke valve (9) of parallel connection.