CN86209937U

CN86209937U - Micro air compressor

Info

Publication number: CN86209937U
Application number: CN 86209937
Authority: CN
Inventors: 肖玉平; 苑邦永; 杨希明
Original assignee: TRACTOR SPARE-PART FACTORY OF YUNCHENG COUNTY SHANDONG PROV
Current assignee: TRACTOR SPARE-PART FACTORY OF YUNCHENG COUNTY SHANDONG PROV
Priority date: 1986-11-28
Filing date: 1986-11-28
Publication date: 1987-12-12

Abstract

The utility model provides a micro air compressor, which is used as the air source of a small four-wheel tractor gas brake apparatus. The utility model is arranged on the front cover of the small four-wheel tractor; a single circular arc cam is arranged on one shaft of the tractor; the circular arc cam is utilized for impelling a roller and a plunger rod to move; the reciprocating motion of a plunger is realized; the plunger rod is provide with a positioning guiding device; an oil passage is arranged for assuring piston lubrication. The unloading gear is arranged.

Description

Micro air compressor

The utility model provides a kind of micro-air compressor, is used for tractor with small four wheels Pneumatic braking device air supply source.

Existing miniature reciprocating compressor generally adopts the crankshaft-and-connecting-rod structure, and the power input is rotated bent axle, and connecting rod swings up and down, thereby realizes the to-and-fro motion of piston, reaches to suck and compressed-air actuated purpose.This structure must have manufacturing process complicated crank, connecting rod and a big crankcase.Zy-0.03/0.69 type air compressor is exactly this structure.The air compressor of this model generally is contained in the right back of tractor with small four wheels, and 1 external part of tractor is adorned a belt pulley, by V belt air compressor is rotated, and this kind of drive must be made belt pulley, and needs often to change V belt.

In order to overcome above-mentioned shortcoming, the purpose of this utility model provides a kind of compact structure, simple, cheap, easy to manufacture miniature reciprocating compressor.

The utility model adopts and is contained in the position that the tractor with small four wheels protecgulum is installed oil hydraulic pump, utilize roller follower lever list circular arc mechanism principle, on 1 of tractor with small four wheels, adorn a single circular arc cam (1), promote roller (4), plunger rod (7) pumps, and plunger rod (7) drives piston (13) to-and-fro motion.

In order to make the normal engaged of roller (4) and single circular arc cam (1), prevent to occur in piston (13) to-and-fro motion rotating, on plunger rod (7) and connection dish (5), be provided with guide-localization key (17).

In the mechanism of roller (4), plunger rod (7), single circular arc cam (1), the strain displacement equation of plunger rod (7) is the trigonometric function relation.In whole stroke, acceleration is bigger, the impact that relaxes is arranged, but the acceleration change rule is more level and smooth, and midstroke does not have impact, in order to prevent that impacting from appearring in entire mechanism, coupling rational cylindrically coiled spring (2) must be housed between plunger rod (7) and connection dish (5), roller (4) is contacted all the time with single circular arc cam (1).

The utility model is provided with on cylinder barrel (14) and the contacted relief arrangement of plunger rod (7) (15), breaks away to realize plunger rod (7) and single circular arc cam (1), makes 1 idle running of tractor.

For improving the life-span of the present utility model, roller (4) adopts the bearing capacity and the 300 bigger profile shafts of power that withstand shocks to hold.For guaranteeing that piston (13) has enough lubricating, and has a plurality of oilholes on connection dish (5).

The utility model is compared with existing miniature reciprocating compressor, crankshaft-link rod, crankcase have been removed on the structure, drive part has removed belt pulley, and compact structure is simple, volume is little, in light weight, Nover practical, cost can reduce by 40%, and can satisfy the requirement of tractor with small four wheels gas braking ability, make the pneumatic brake system simpler, attractive in appearance.Be applicable to the various types tractor with small four wheels that does hauling operation.

Below in conjunction with drawings and Examples the utility model is done narration at length.

Description of drawings:

Fig. 1 is the utility model plan view;

Fig. 2 is the utility model left view.

Be a specific embodiment of the present utility model below.

By single circular arc cam (1), roller (4), pin (3), plunger rod (7), copper sheathing (8), piston (13), relief arrangement (15), cylinder barrel (14), connection dish (5), pad (6), cylinder cap assembly (12), guide-localization key parts such as (17) are formed as Fig. 1, Fig. 2 the utility model.

The utility model is installed in tractor with small four wheels protecgulum oil hydraulic pump place by connection dish (5).Single circular arc cam (1) is installed on 1 of tractor with small four wheels, and is fixing with key (16).Single circular arc cam (1) is with 1 rotation of tractor, promote roller (4), plunger rod (7), piston (13) rises, when single circular arc cam (1) when moving upward by minimum point, piston (13) is moved up by lower dead centre, the interior air of cylinder barrel (14) is compressed, and when pressure increased, air inlet Reed Valve (10) was closed.When cylinder barrel (14) internal pressure during greater than the pressure of exhaust Reed Valve (11) outside, exhaust Reed Valve (11) is backed down, pressurized air enters gas receiver (not marking among the figure) by pipeline, when single circular arc cam (1) when moving to peak, piston (13) reaches upper dead center, exhaust process finishes, single circular arc cam (1) continues by peak when minimum point is moved, utilize the elastic force of compressed spring (2), piston (13) moves down, when cylinder barrel (14) internal pressure during less than air pressure, air inlet Reed Valve (10) is opened, air is in filter cleaner (9) enters cylinder barrel (14), and when single circular arc cam (1) when forwarding minimum point to, piston (13) also arrives lower dead centre, intake process finishes, single circular arc cam like this (1) constantly rotates, and piston (13) is constantly to-and-fro motion also, realizes work of the present utility model.

Claims

1, a kind of piston that includes, be used as the micro-air compressor of air supply source in the tractor with small four wheels Pneumatic braking device of cylinder barrel and cylinder cap assembly, it is characterized in that it is provided with a roller [4] that can be installed in the promoted micro-air compressor on 1 of the tractor with small four wheels, the reciprocating single circular arc cam of plunger rod [7] [1], between plunger rod [7] and connection dish [5], cylindrically coiled spring [2] is housed, roller [4] is contacted all the time with single circular arc cam [1], there is roller [4] lower end of plunger rod [7], combine as a whole with pin [3] and plunger rod [7], connection dish [5] connects with cylinder barrel [14], the upper end of plunger rod [7] connects piston [13], is provided with cylinder cap assembly [12] on the top of cylinder barrel [14].

2, according to the described micro-air compressor of claim 1, it is characterized in that, on plunger rod (7), connection dish (5), be provided with guide-localization key (17).

3,, it is characterized in that roller (4) adopts 300 profile shafts to hold according to the described micro-air compressor of claim 1.

4,, it is characterized in that on connection dish (5), having a plurality of oilholes according to the described micro-air compressor of claim 1.