CN203665041U - Upper cover fastening tool of pneumatic type EGR valve - Google Patents

Abstract

The utility model discloses an upper cover fastening tool of a pneumatic type EGR valve. The upper cover fastening tool comprises a base, an upper die and a pressure head. A guide stud is arranged between the pressure head and the base, and a reset spring is arranged on the guide stud. An angle of chamfer is arranged on the inner ring of the pressure head. A pneumatic assembly is arranged, and a gland is arranged at the lower end of the pneumatic assembly and drives the pressure head. By the adoption of the technical scheme, the fastening device is reasonable in design, convenient to use, high in efficiency and automation degree, and wide in application range, consistency of fastened products is good, the quality of outgoing products is guarantee, labor intensity of workers is greatly relieved, and the workers can conveniently and safely operate the upper cover fastening device.

Description

Pneumatic type EGR valve upper cover snapping frock

Technical field

EGR technology, EGR Technology (Exhaust Gas Recycle) is the emission-control equipment arranging for pernicious gas (NOx).It enters a part of exhaust cycle of engine after air inlet pipe is mixed with fresh air and again enters combusted cylinder, and to increase the thermal capacity of gaseous mixture, the maximum temperature while reducing burning, suppresses the generation of NOx; Can reduce engine consumption simultaneously.In said process, EGR valve, as a crucial executive component, has been brought into play huge effect, EGR valve is according to engine actual working state, adjust the aperture of valve in good time and accurately, thereby adjust the exhausted air quantity that enters engine, then play the object that improves discharge standard.

Pneumatic type EGR valve product in process of production, owing to being subject to parts quality, the impacts such as assembly technology, all the time there is the existence of substandard product, showing as of substandard product: upper cover obscission does not sternly appear in product upper cover snapping, or directly upper cover riveting is split, thereby make EGR valve upper cover vacuum chamber poorly sealed close, the direct result causing is exactly the slack-off and unstable properties of EGR response valve speed.If this type of substandard product is used on automobile, will cause being short of power of automobile, discharge the appearance of problems such as exceeding standard.

Flow out for fear of substandard product, pneumatic type EGR valve production firm all can strictly control the upper cover snapping technique of EGR valve in assembling process.

Existing market there is no special pneumatic type EGR valve snapping upper cover frock, the pneumatic EGR valve upper cover snapping frock air press snapping of present stage, the manual accommodating tool of employee before snapping, such shortcoming is: air press pressure and stroke (displacement) cannot be monitored, in snapping process because the quality problems more or less that upper cover or valve body occur in process of production, be prone to the tight and riveting of upper cover snapping and split phenomenon, directly cause the rising of production cost, the manual accommodating tool spended time of employee is long simultaneously, and labour intensity is larger.

Summary of the invention

The purpose of this utility model be to provide a kind of efficient, accurately, the high pneumatic type EGR valve upper cover snapping frock of automaticity to be to make up the deficiency of prior art, meets the needs of batch production.

The technical scheme that the utility model adopts is: pneumatic type EGR valve upper cover snapping frock, is characterized in that:

Comprise base, counterdie and pressure head, between pressure head and base, have guiding screw pole, on guiding screw pole, have back-moving spring; Pressure head inner ring has chamfering; Be provided with Pneumatic assembly, Pneumatic assembly lower end is gland, gland drive ram.

Optimize, Pneumatic assembly is arranged with pre-wedge, in pre-wedge, has pre-pressure head, between pre-pressure head and pre-wedge, has pre-compressed spring, and pre-pressure head has free travel in pre-wedge.

The beneficial effects of the utility model are: fastening device is reasonable in design, easy to use, and efficiency is high, automaticity is high, applied widely, the good product consistency that snapping goes out, guaranteed the to dispatch from the factory quality of product greatly reduces staff labor intensity simultaneously, facilitates Employee Security operation.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the 3-D view of Fig. 1.

Fig. 3 is the profile of Fig. 2.

Fig. 4 is the partial enlarged drawing of Fig. 3.

Fig. 5 is the partial enlarged drawing of Fig. 4.

The specific embodiment

Embodiment:

In the drawings, 1 is base, and 2 is counterdie, and 3 is pressure head, and 4 is guiding screw pole, 5 back-moving springs; 6 is 45 degree chamferings, and 7 is Pneumatic assembly, and 8 is gland, and 9 is EGR valve, and 10 is upper cover limit, and 11 is pre-wedge, and 12 is pre-pressure head, and 13 is pre-compressed spring.

When use, final object is to make 10 bendings of upper cover limit, and back-off is lived EGR valve 9, realizes and being fixedly connected with of EGR valve 9.

Preparation: EFG valve 9 and upper cover are put into counterdie 2.

Sequence of movement:

Pneumatic assembly 7 moves down, and pre-pressure head 12 touches EFG valve 9, and it is had to a pressure, has just realized and has compressed location.

Pneumatic assembly 7 continues mobile, and pre-pressure head 12 can overcome pre-compressed spring 13, in the pre-wedge 11 of indentation, to guarantee that pressure can not continue to increase.

Pneumatic assembly 7 moves down, and power passes to pressure head 3 by gland 10, and in pressure head 3 folding processes, 45 degree chamferings 6 in it will be pushed down upper cover limit 10, make its bending, and back-off, achieves the goal.

Above-mentioned pressure head 3 folding processes, rely on guiding screw pole 4 to lead, and overcome the elastic force of back-moving spring 5 simultaneously.

After compacting, Pneumatic assembly 7 rises, and all parts reset.

By such action can guarantee upper cover and valve body lower cover snapping tight, namely guaranteed that upper cover vacuum chamber seals completely.

Claims (2)

1. pneumatic type EGR valve upper cover snapping frock, is characterized in that:

Comprise base, counterdie and pressure head, between pressure head and base, have guiding screw pole, on guiding screw pole, have back-moving spring; Pressure head inner ring has chamfering; Be provided with Pneumatic assembly, Pneumatic assembly lower end is gland, gland drive ram.

2. pneumatic type EGR valve upper cover snapping frock according to claim 1, is characterized in that: Pneumatic assembly is arranged with pre-wedge, in pre-wedge, has pre-pressure head, between pre-pressure head and pre-wedge, has pre-compressed spring, and pre-pressure head has free travel in pre-wedge.

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