CN201346507Y - Improved structure of gas flow regulation assembly for spray gun - Google Patents

Abstract

The utility model discloses the improved structure of a gas flow regulation assembly for a spray gun. The improved structure of the gas flow regulation assembly mainly comprises a regulation base, a regulation rod, and an O-shaped sealing ring, wherein the regulation rod consists of a regulation knob, a valve stem and a rod head integrated with each other; the lower middle part of the inner hole of the regulation base is connected with the lower middle part of the outer side of the valve stem through double-end or multi-end threads; at least two grooves are formed at the middle part of the valve stem; the O-shaped ring with square cross section is arranged in the groove; the outer surface of the O-shaped ring is slightly higher than the outer profile of the valve stem and keeps contact with the inner hole surface of the extension part of the regulation base; a clamp groove is formed in the head of the valve stem of the regulation rod; and a retaining ring for limiting position is arranged in the clamp groove. The improved structure overcomes the disadvantages of the prior gas flow regulation assembly of the spray gun, and has the advantages of short regulation time, good sealing performance, long service life of the sealing ring, flexible rotation of the regulation rod, and no jamming.

Description

A kind of tolerance adjusting part structure-improved of spray gun for paint

Technical field

The utility model relates to the tolerance adjusting part structure-improved of a kind of spray gun for paint, particularly a kind of spray gun for paint.

Background technology

In spray gun for paint, shine intensity for the spray of control paint, generally all can be provided with the tolerance adjusting part by the rifle body, existing tolerance adjusting part structure as shown in Figure 1, its mainly comprise adjustment seat 1 ', adjusting rod 2 ' and elastic sealing structure 3 '.Wherein adjustment seat 1 ' endoporus top be provided with groove 11 ', the endoporus middle and lower part be provided with single head internal thread 12 '; And the adjusting knob 21 of adjusting rod 2 ' be provided with by split ', valve rod 22 ' and bar head 23 ' form, wherein adjusting knob 21 ' arranged outside have single head external screw thread 211 ' with the internal thread 12 of adjustment seat ' be connected, valve rod 22 ' head stretch out adjustment seat 1 ' and with bar head 23 ' be connected; Described elastic sealing structure 3 ' be arranged on bar head 23 ' and adjustment seat 1 ' between, it comprise compression spring 31 ', flat shim 32 ' and a cross section for circular " O " type circle 33 ', compression spring 31 ' one ends hold bar head 23 ' on, the other end hold flat shim 32 ' on, simultaneously its groove 11 of flat shim 32 ' extruding " O " type circle 33 ' make near adjustment seat 1 ' endoporus top ' and valve rod 22 ' formation seal.Many, the complex structure of whole tolerance adjusting part accessory, not only processing trouble, assembling is also inconvenient, and the fault rate during use is also high.

In use, promote its rotation of adjusting knob 21 ' make, and then produce and to move axially and to realize that tolerance regulates, at this, adjusting knob 21 ' with adjustment seat 1 ' the single thread connected mode have certain problem, light for regulating on the one hand, the pitch of single thread can not be provided with too big, and this span that causes tolerance to be regulated is very little, generally is adjusted to minimum tolerance from maximum tolerance and need rotates several circles, make adjustment seat 1 ' and adjusting rod 2 ' the adjusting time long, mount and dismount all cumbersome; On the other hand, single thread at each stress point of junction all not on same horizontal plane, the screw thread dislocation might take place in the middle of using and make adjustment seat 1 ' with adjusting rod 2 ' stuck.

Above-mentioned elastic sealing structure 3 ' after installation, 33 ' the crimp of " O " type circle near adjustment seat endoporus top groove 11 ' and valve rod 22 ', the sealing structure exists on the one hand that sealing contact surface is little, the problem of poor sealing, on the other hand " O " type circle 33 ' the crimp meeting bring valve rod 22 ' certain frictional force, and then make adjusting rod 2 ' rotation jerky, produce abnormal sound, and " O " type circle 33 ' in use is easy to wear, compression spring 31 ' also can fatigue damage, often replacing.In addition, because of elastic sealing structure 3 ' by three accessories form and be installed in regulate club head 23 ' and adjustment seat 1 ' between, consider bar head 23 ' diameter greater than valve rod 22 ', for making elastic sealing structure 3 ' installation smoothly, adjusting rod 2 ' valve rod 22 ' and bar head 23 ' must the split setting, this causes whole tolerance adjusting part accessory various, processing and installation trouble.

The utility model content

For overcoming above-mentioned shortcoming, the utility model provides a kind of tolerance adjusting part structure-improved of spray gun for paint, and it has the characteristics of adjusting time weak point, good seal performance, sealing ring long service life, and adjusting rod rotates flexible, without hindrance puckery phenomenon simultaneously.

For achieving the above object, the utility model is by the following technical solutions:

A kind of tolerance adjusting part structure-improved of spray gun for paint mainly comprises " O " type circle of adjustment seat, adjusting rod and sealing usefulness, and it is characterized in that: the adjusting knob that described adjusting rod is formed by one, valve rod and bar head are formed; Described adjustment seat endoporus middle and lower part is connected by double end or multiple thread with middle and lower part, the valve rod outside; Described valve rod middle part is provided with at least two grooves, and it is square " O " type circle that a cross section all is set in each groove, and " O " type circle lateral surface contacts a little more than the outline of valve rod and with the inner hole surface of adjustment seat extension; Adjusting rod valve rod head is provided with a draw-in groove simultaneously, is provided with the back-up ring that stop bit is used in the draw-in groove.

Above-mentioned back-up ring is a split washer.

All accessories of the utility model add up have only adjustment seat, adjusting rod, back-up ring and several " O " type circles, accessory is few, simple in structure, is convenient to processing and assembling, has reduced the operational failure rate.

Adopt double end or multiple thread to be connected between the utility model adjustment seat and the adjusting rod, it has overcome the defective that existing one start screw connects, the span of tolerance adjusting is big on the one hand, as long as generally being adjusted to minimum tolerance from maximum tolerance revolves and turns around, the adjusting time of adjustment seat and adjusting rod is shortened greatly, be convenient to user's operation, mount and dismount also more convenient; On the other hand, the stress point that double thread is connected the junction has two to be positioned on the same horizontal plane, and multiple thread connects then more, and the screw thread problem of misalignment that this has well solved when regulating makes adjustment seat and adjusting rod not stuck.

In the utility model, the sealing of adjustment seat and adjusting rod is that square " O " type circle is realized by several cross sections, and after installation, " O " type circle does not need to be extruded and just can form large-area with adjustment seat extension endoporus and contact, it is big to have contact-making surface, the characteristics of good airproof performance.In addition, also there is following advantage in the sealing structure: 1, whole hermetically-sealed construction only comprises that several grooves and the cross section that is arranged in the groove are square " O " type circle, accessory is few, simple in structure, be convenient to processing, be not more than stem diameter because of bar head diameter simultaneously, make the installation of " O " type circle directly enter to get final product from head cover, bar head and valve rod do not need the split setting to assemble again, and installation and replacing are all very convenient, and 2, not crimp after " O " type circle is installed, the frictional force that brings valve rod is very little, adjustment seat is rotated flexibly, without hindrance puckery phenomenon, do not produce abnormal sound, and " O " type circle is not easy to wear, long service life.

In addition,, one draw-in groove is set, is provided with the split washer that stop bit is used in the draw-in groove at adjusting rod valve rod head for avoiding the adjusting rod amount of feeding excessive.

Description of drawings

The structural representation of Fig. 1, existing spray gun for paint tolerance adjusting part.

Fig. 2, planar structure schematic diagram of the present utility model.

The specific embodiment

As shown in Figure 2, a kind of tolerance adjusting part structure-improved of spray gun for paint mainly comprises " O " type circle 3 of adjustment seat 1, adjusting rod 2 and sealing usefulness.The adjusting knob 21 that described adjusting rod 2 is formed by one, valve rod 22 and bar head 23 are formed.Described adjustment seat 1 endoporus middle and lower part is connected by double end or multiple thread with middle and lower part, the valve rod outside, adopts double thread 11 in the present embodiment.Described valve rod 22 middle parts are provided with at least two grooves 221, adopt two in the present embodiment, it is square " O " type circle 3 that one cross section all is set in each groove 221, and " O " type circle 3 lateral surfaces contact a little more than the outline of valve rod 22 and with the inner hole surface of adjustment seat extension 12.

In addition,, one draw-in groove 222 is set, is provided with the split washer 4 that stop bit is used in the draw-in groove 222 at adjusting rod valve rod 22 heads for avoiding excessive the coming off of adjusting rod 2 amount of feeding.

All accessories of the utility model add up have only adjustment seat 1, adjusting rod 2, back-up ring 3 and several " O " type circles 4, accessory is few, simple in structure, is convenient to processing and assembling, has reduced the operational failure rate.

Adopt double end or multiple thread to be connected between the utility model adjustment seat 1 and the adjusting rod 2, it has overcome the defective that existing one start screw connects, the span of tolerance adjusting is big on the one hand, as long as generally being adjusted to minimum tolerance from maximum tolerance revolves and turns around, the adjusting time of adjustment seat 1 and adjusting rod 2 is shortened greatly, be convenient to user's operation, mount and dismount also more convenient; On the other hand, the stress point that double thread is connected the junction has two to be positioned on the same horizontal plane, and multiple thread connects then more, and the screw thread problem of misalignment that this has well solved when regulating makes adjustment seat 1 and adjusting rod 2 not stuck.

In the utility model, the sealing of adjustment seat 1 and adjusting rod 2 is that square " O " type circle 3 is realized by several cross sections, and after installation, " O " type circle 3 does not need to be extruded and just can form large-area with adjustment seat extension 12 endoporus and contact, it is big to have contact-making surface, the characteristics of good airproof performance.In addition, also there is following advantage in the sealing structure: 1, whole hermetically-sealed construction only comprises that several grooves 221 and the cross section that is arranged in the groove are square " O " type circle 3, accessory is few, simple in structure, be convenient to processing, be not more than valve rod 22 diameters because of bar head 23 diameters simultaneously, make the installation of " O " type circle 3 directly enter to get final product from bar head 23 covers, bar head 23 and valve rod 22 do not need the split setting to assemble again, and installation and replacing are all very convenient, and 2, not crimp after " O " type circle 3 is installed, the frictional force that brings valve rod 22 is very little, adjusting rod 2 is rotated flexibly, without hindrance puckery phenomenon, do not produce abnormal sound, and " O " type circle 3 is not easy to wear, long service life.

Claims (1)

1. A kind of tolerance adjusting part structure-improved of spray gun for paint mainly comprises " O " type circle of adjustment seat, adjusting rod and sealing usefulness, and it is characterized in that: the adjusting knob that described adjusting rod is formed by one, valve rod and bar head are formed; Described adjustment seat endoporus middle and lower part is connected by double end or multiple thread with middle and lower part, the valve rod outside; Described valve rod middle part is provided with at least two grooves, and it is square " O " type circle that a cross section all is set in each groove, and " O " type circle lateral surface contacts a little more than the outline of valve rod and with the inner hole surface of adjustment seat extension; Adjusting rod valve rod head is provided with a draw-in groove simultaneously, is provided with the back-up ring that stop bit is used in the draw-in groove.

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