CN202090957U

CN202090957U - Pneumatic motor for airless spraying machine

Info

Publication number: CN202090957U
Application number: CN2011201886327U
Authority: CN
Inventors: 吴明万
Original assignee: CHONGQING TONGSHENG PLASTIC Co Ltd
Current assignee: CHONGQING TONGSHENG PLASTIC Co Ltd
Priority date: 2011-06-07
Filing date: 2011-06-07
Publication date: 2011-12-28
Anticipated expiration: 2021-06-07

Abstract

The utility model discloses a pneumatic motor for an airless spraying machine, which includes an air cylinder and a piston, wherein a cavity above the piston is an upper cavity; a cavity below the piston is a lower cavity; a reversing valve body is connected onto one side of the air cylinder; the reversing valve body is connected with an upper reversing piston body, a lower reversing piston body and a reversing piston in a matched manner; a shift fork is connected with the middle part on the right side of the reversing piston through a pin; a roller mechanism is arranged at the middle part on the right side of the reversing valve body; a roller of the roller mechanism is adjoined to the shift fork; an air distribution block is arranged on the left side of the reversing valve body; a slide plate is connected with the middle part of the air distribution block and clung to a sliding block clamped at the middle part of the left side of the reversing piston; and two pilot valves with the same structures are arranged at the top of the air cylinder and on a cylinder head respectively. Through the adoption of the pneumatic motor for the airless spraying machine, the possibility of the occurrence of the reversing death point of the spraying machine during the operation is low, the sliding block does not stay in the middle position, and the instant reversing is guaranteed to be reliable, so that the spraying machine is ensured to operate constantly and the stopping due to reversing failure is avoided, and the efficiency is improved.

Description

A kind of pneumatic motor of airless sprayer

Technical field

The utility model relates to a kind of pneumatic motor of airless sprayer.

Background technique

The pneumatic motor of airless sprayer is the core drive part of spraying machine, and the reliability of its motion directly influences its use and scope, and the pneumatic motor reliability of traditional pilot valve formula does not reach the ask for something conditions of higher.Mainly show: pilot valve is not to trigger to open and air-flow is discharged a part from observing screw hole, causes slide block easily to be parked in the neutral position, the sealing intake duct, thus pump quits work, and therefore, needs a kind of novel pneumatic motor with head it off.

Summary of the invention

The purpose of this utility model provides a kind of pneumatic motor of airless sprayer, and its reliability height solves the commutation dead point and makes its motor moment commutation problem, guarantees that slide block is not parked in the neutral position.

The pneumatic motor of a kind of airless sprayer described in the utility model, cylinder head, the piston that cooperates with cylinder inner wall, an end and the piston center portion that comprises cylinder, is connected with cylinder by first screw piston rod that the other end stretches out from the cylinder head center that is connected, cavity above the piston is an epicoele, cavity below the piston is a cavity of resorption, it is characterized in that:

The top of one commutation valve body is connected with reversing piston body on, bottom by second screw fit and is connected with by second screw fit that reversing piston body, middle part are provided with reversing piston; On last reversing piston body and following reversing piston body, be respectively equipped with " O " shape seal ring and " Y " shape seal ring, cavity between the lower end of last reversing piston body and the upper end of reversing piston is a uuper valve chamber, and the upper end of following reversing piston body and the cavity between the lower end of piston are lower valve chamber; Right side central at reversing piston is connected with a shift fork by pin; Middle part on commutation valve body right side is provided with roller mechanism, the roller of this roller mechanism and shift fork near; The right side of this commutation valve body is connected a side of cylinder;

One distribution piece is connected the left side of commutation valve body by the 3rd screw, is connected with a slide plate at the middle part of this distribution piece, and this slide plate and the slide block that is stuck on the reversing piston left side central portion are close to;

Two pilot valves that structure is identical, on the top that is located at cylinder, another is located on the cylinder head; The E air flue of inclined hole through being located on the cylinder that is located on the guide's valve body on the cylinder head is communicated with the commutation valve body, corresponding the communicating of lower valve chamber of D air flue and the valve body that commutates, the epicoele above the piston be located at the distribution piece on corresponding the communicating of A air flue; The F air flue of inclined hole through being located on the cylinder head that is located on the guide's valve body on the cylinder head is communicated with the commutation valve body, corresponding the communicating of uuper valve chamber of C air flue and the valve body that commutates, the cavity of resorption below the piston be located at the distribution piece on corresponding the communicating of B air flue.

Further, described roller mechanism by the roller base overcoat, be located at first spring in the roller base overcoat and roller base and the roller that is connected on the roller base by axle constitutes, the roller base overcoat is connected the middle part on commutation valve body right side by the 4th screw.

The pneumatic motor of described a kind of airless sprayer, its described pilot valve by guide's valve body, valve gap, be located at second spring in guide's valve body, valve rod, the 3rd spring and top cover and constitute, a pilot valve is connected by the 5th screw on the top of cylinder, and another pilot valve is connected on the cylinder head by screw.

The roller 13 of roller mechanism and shift fork 12 near, in case limited slip block stops at neutral position one sealing intake duct.The A air flue connects the epicoele of cylinder, and the B air flue connects the cavity of resorption of cylinder, and E air flue, F air flue are connected pressurized air always.

The utility model is compared with prior art and had the following advantages: the pilot valve structure of instantaneous trigger guarantees that pilot valve moment opens, the shift fork roller structure of slide block, roller group control shift fork can only can not rest on the center of arc of shift fork back and the position that the roller center coincides on any one side; The commutation dead point be difficult for to take place in the spraying machine running, and slide block is not parked in the neutral position, guarantees that commutation is instantaneous reliable, thereby guarantees that the constant operation of spraying machine do not shut down because of commutation failure, raises the efficiency.

Description of drawings

Fig. 1 is a structural drawing of the present utility model;

Fig. 2 is the structural drawing of slide block;

Fig. 3 is the structural drawing of shift fork;

Fig. 4 is the structural drawing of top cover;

Among the figure: 1-is following reversing piston body, and 2-is the commutation valve body, and 3-is a slide plate, 4-is the distribution piece, and 5-is a pin, and 6-is a slide block, 7-is the 3rd screw, and 8-is " O " shape seal ring, and 9-is " Y " shape seal ring, 10-is second screw, and 11-is last reversing piston body, and 12-is a shift fork, 13-is a roller, and 14-is an axle, and 15-is a reversing piston, 16-is a roller base, and 17-is first spring, and 18-is the roller base overcoat, 19-is the 4th screw, and 20-is guide's valve body, and 21-is a valve gap, 22-is second spring, 23-is a valve rod, and 24-is the 3rd spring, and 25-is the top cover, 26-is the 5th screw, 27-is a cylinder, and 28-is a piston, and 29-is a piston rod, 30-is a cylinder head, and 31-is first screw.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

Pneumatic motor referring to Fig. 1, Fig. 2, Fig. 3 and a kind of airless sprayer shown in Figure 4, the cylinder head 30 that comprises cylinder 27, is connected with cylinder by first screw 31, piston 28, an end and the piston center portion that cooperates with the cylinder inner wall piston rod 29 that the other end stretches out from the cylinder head center that is connected, cavity above the piston is an epicoele, cavity below the piston is a cavity of resorption, it is characterized in that:

The top of one commutation valve body 2 is connected with reversing piston body 11 on, bottom by second screw 10 and is connected with by second screw fit that reversing piston body 1, middle part are provided with reversing piston 15; On last reversing piston body and following reversing piston body, be respectively equipped with " O " shape seal ring 8 and " Y " shape seal ring 9, cavity between the lower end of last reversing piston body and the upper end of reversing piston is a uuper valve chamber, and the upper end of following reversing piston body and the cavity between the lower end of piston are lower valve chamber; Right side central at reversing piston 15 is connected with a shift fork 12 by pin 5; Middle part on commutation valve body 2 right sides is provided with roller mechanism, the roller 13 of this roller mechanism and shift fork 12 near; The right side of this commutation valve body 2 is connected a side of cylinder 27;

One distribution piece 4 is connected the left side of commutation valve body 2 by the 3rd screw 7, is connected with a slide plate 3 at the middle part of this distribution piece, and this slide plate and the slide block 6 that is stuck on reversing piston 15 left side central portion are close to;

Two pilot valves that structure is identical, on the top that is located at cylinder 27, another is located on the cylinder head 30; The E air flue of inclined hole through being located on the cylinder that is located on the guide's valve body 20 on cylinder 27 tops is communicated with commutation valve body 2, corresponding the communicating of lower valve chamber of D air flue and the valve body that commutates, the epicoele above the piston be located at distribution piece 4 on corresponding the communicating of A air flue; The F air flue of inclined hole through being located on the cylinder head that is located on the guide's valve body 20 on the cylinder head 30 is communicated with commutation valve body 2, corresponding the communicating of uuper valve chamber of C air flue and the valve body that commutates, the cavity of resorption below the piston be located at distribution piece 4 on corresponding the communicating of B air flue.

Described roller mechanism by roller base overcoat 18, be located at first spring 17 in the roller base overcoat and roller base 16 and the roller 13 that is connected on the roller base by axle 14 constitutes, roller base overcoat 18 is connected the middle part on commutation valve body 2 right sides by the 4th screw 19.

Described pilot valve by guide's valve body 20, valve gap 21, be located at second spring 22 in guide's valve body, valve rod 23, the 3rd spring 24 and top cover 25 and constitute, a pilot valve is connected on the top of cylinder 27 by the 5th screw 26, and another pilot valve is connected on the cylinder head 30 by screw.

Working principle of the present utility model: pressurized air by the inclined hole on guide's valve body 20 and second spring 22 act on together valve rod 23 above, when moving upward to the top, the piston in the cylinder 28 shifts top cover 25 onto behind certain position, the 3rd spring 24 just throws open valve rod 23 and contacts with guide's valve body 20, make the pressurized gas of the lower valve chamber of commutation valve body be discharged to the epicoele of cylinder by the space between guide's valve body 20 and the top cover 25, thereby be discharged in the atmosphere, finish pressure release.

When last reversing piston 11 moves downward, the gas of the uuper valve chamber of commutation valve body is opened additional pressurized air by following pilot valve, thereby fast aeration, promoting reversing piston 15 drive slide blocks 6 moves down, so the epicoele air inlet of cylinder, a gas exchange process is finished in the cavity of resorption exhaust, piston 28 moves downward, and valve rod 23 resets under the effect of second spring 22; Vice versa, and when the piston 28 of cylinder moved to the lower end and contacts with the top cover of following pilot valve, its working principle was the same.

Special instruction is at last, and this example illustrates a kind of technological scheme, although carry out preferable change or replacement with reference to this example, and does not break away from the aim and the scope of this example, and it all should be encompassed in the middle of the scope of claim of the present utility model.

Claims

1. the pneumatic motor of an airless sprayer, the cylinder head (30) that comprise cylinder (27), is connected, piston (28), an end and the piston center portion that cooperates with the cylinder inner wall piston rod (29) that the other end stretches out from the cylinder head center that is connected with cylinder, cavity above the piston is an epicoele, cavity below the piston is a cavity of resorption, it is characterized in that:

The right side of one commutation valve body (2) is connected a side of cylinder (27), and the top of this commutation valve body is connected with on one reversing piston body (11), bottom and is connected with that reversing piston body (1), middle part are provided with reversing piston (15); Cavity between the lower end of last reversing piston body and the upper end of reversing piston is a uuper valve chamber, and the upper end of following reversing piston body and the cavity between the lower end of piston are lower valve chamber; Right side central at reversing piston (15) is connected with a shift fork (12) by pin (5); Middle part on commutation valve body (2) right side is provided with roller mechanism, the roller of this roller mechanism (13) and shift fork (12) near;

One distribution piece (4) is connected the left side of commutation valve body (2), is connected with a slide plate (3) at the middle part of this distribution piece, and this slide plate is close to the slide block (6) that is stuck on reversing piston (15) left side central portion;

Two pilot valves that structure is identical, on the top that is located at cylinder (27), another is located on the cylinder head (30); The E air flue of inclined hole through being located on the cylinder that is located on the guide's valve body (20) on cylinder (27) top is communicated with commutation valve body (2), the D air flue with the commutation valve body corresponding the communicating of lower valve chamber, the epicoele above the piston be located at distribution piece (4) on corresponding the communicating of A air flue; The F air flue of inclined hole through being located on the cylinder head that is located on the guide's valve body (20) on the cylinder head (30) is communicated with commutation valve body (2), corresponding the communicating of uuper valve chamber of C air flue and commutation valve body, the cavity of resorption below the piston be located at distribution piece (4) on corresponding the communicating of B air flue.

2. the pneumatic motor of a kind of airless sprayer according to claim 1, it is characterized in that: described roller mechanism by roller base overcoat (18), be located at first spring (17) in the roller base overcoat and roller base (16) and be connected roller (13) formation on the roller base by axle (14), roller base overcoat (18) is connected the middle part on valve body (2) right side of commutating.

3. the pneumatic motor of a kind of airless sprayer according to claim 1 and 2, it is characterized in that: described pilot valve by guide's valve body (20), valve gap (21), be located at second spring (22), valve rod (23), the 3rd spring (24) and top cover (25) formation in guide's valve body, a pilot valve is connected on the top of cylinder (27), and another pilot valve is connected on the cylinder head (30) by screw.