CN104006928A - Plug mechanism for testing air impermeability of air cylinder - Google Patents

Plug mechanism for testing air impermeability of air cylinder Download PDF

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Publication number
CN104006928A
CN104006928A CN201410177793.4A CN201410177793A CN104006928A CN 104006928 A CN104006928 A CN 104006928A CN 201410177793 A CN201410177793 A CN 201410177793A CN 104006928 A CN104006928 A CN 104006928A
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CN
China
Prior art keywords
plug
blind hole
cylinder
support
axle
Prior art date
Application number
CN201410177793.4A
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Chinese (zh)
Other versions
CN104006928B (en
Inventor
张容
Original Assignee
雄华机械(苏州)有限公司
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Filing date
Publication date
Application filed by 雄华机械(苏州)有限公司 filed Critical 雄华机械(苏州)有限公司
Priority to CN201410177793.4A priority Critical patent/CN104006928B/en
Priority claimed from CN201410177793.4A external-priority patent/CN104006928B/en
Publication of CN104006928A publication Critical patent/CN104006928A/en
Application granted granted Critical
Publication of CN104006928B publication Critical patent/CN104006928B/en

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Abstract

The invention discloses a plug mechanism for testing air impermeability of an air cylinder. The plug mechanism comprises a sealing head (10), a telescopic device (20) for stretching out and drawing back the sealing head (10) and a positioning device (30) for positioning the sealing head (10) in the axial direction. The plug device further comprises a universal rotating device which comprises a support (51), a ball (52), a shaft (53) and a guide device (54). A blind hole is formed in the support (51) in the axial direction, wherein the bottom of the blind hole is conical. A conical blind hole is formed in one end of the shaft (53), and the ball (52) is arranged between the blind hole of the support (51) and the blind hole of the shaft (53). The blind hole of the shaft (53) and the blind hole of the support (51) blind hole are in clearance fit with each other, and the guide device (54) can make the shaft (53) do axial movement with a certain displacement amount. The sealing head capable of doing the certain amount of universal movement can compensate the error generated when a fixture clamps the air cylinder and the processing error of the air cylinder itself, so that holes or channels of the air cylinder can be accurately sealed by the sealing head, and thus accuracy of the test result of air permeability of the air cylinder is guaranteed.

Description

A kind of cylinder impermeability detects the plug mechanism of use

Technical field

The present invention relates to the air tightness detection equipment field of part, detect the plug mechanism of use in particular to a kind of cylinder impermeability.

Background technology

Automobile engine cylinder is the critical component of engine, and the impermeability of its each passage directly has influence on the overall mass of engine.The calixconcavity part of cylinder bottom surface and piston top and cylinder inner wall form firing chamber jointly.For the cylinder of overhead valve Otto cycle engine, spark plug not only will be installed, the parts such as valve, valve seating, valve guide bushing, camshaft also to be installed, therefore on cylinder, be respectively equipped with spark plug mounting hole, camshaft hole, oil hole, air intake duct, exhaust duct etc.If cylinder seal is bad, serviceability and the efficiency of engine will be had a strong impact on, and to ensure the impermeability of cylinder entirety, will guarantee that in it, all passages comprise that the positiver sealing of oil duct, chain wheel type chamber, air intake duct, exhaust duct, firing chamber and valve and door line reaches designing requirement, therefore detects just necessary to the impermeability of these projects.In the time carrying out impermeability detection, conventionally adopt the mode of water inspection, be immersed in the water by product, whether there is Bubble formation to judge that whether the impermeability of product is good by manual observation.

For example, February 27 2008 Granted publication day, the disclosure of the invention of Granted publication CN201028986Y a kind of cylinder head assembly impermeability leak tester, in frame, be provided with workbench, workbench is provided with cylinder head assembly sectional fixture plate, be positioned at jig plate in frame around, be provided with the oil path jam group by cylinder control, firing chamber plug group, chain wheel type chamber plug group, air intake duct plug and exhaust duct plug, in above-mentioned plug and plug group, be provided with air admission hole, all air admission holes all share a source of the gas by inlet channel and airtight instrument, each inlet channel is provided with at the complete valve that can be closed of air inlet.And jig plate by left and right jig plate form form left and right two detect stations, oil path jam group and firing chamber plug group are corresponding with left jig plate, chain wheel type chamber plug group, air intake duct plug and exhaust duct plug are corresponding with right jig plate.

But, although this type of detection has realized the bubble-tight detection of cylinder head assembly, and detection is comprehensive, efficiency is high, but, testing result is but difficult to reach degree accurately and reliably, reason is: due to the clamping error of fixture or the mismachining tolerance of cylinder itself, may cause all kinds of plugs can not seal various holes or passage completely, and then affect the accuracy of cylinder airtight test result.Therefore,, under the prerequisite how existing in the clamping error of fixture or the mismachining tolerance of cylinder itself, make all kinds of plugs can seal various holes completely or passage is a technical matters urgently to be resolved hurrily.

Summary of the invention

Technical matters solved by the invention: under the prerequisite existing in the clamping error of fixture or the mismachining tolerance of cylinder itself, make plug various holes or the passage on sealing cylinder completely.

The invention provides following technical scheme: a kind of cylinder impermeability detects the plug mechanism of use, comprise seal head, can be for the flexible retractor device of seal head, for the locating device of seal head axial location, plug mechanism is arranged on to the stationary installation in air-tightness detection device main body.Also comprise the univesal wheelwork being connected with retractor device, described univesal wheelwork comprises support, ball, axle, guide piece, described support is axially offering the blind hole of bottom for taper, described axle one end offers tapered blind hole, described axle inserts support blind hole, described ball is placed between support blind hole and axle blind hole, and coordinating between described axle and support blind hole is clearance fit, and described guide piece can make axle do the axially-movable of certain displacement amount.

Because coordinating between axle and support blind hole is clearance fit, and guide piece can make axle do the axially-movable of certain displacement amount, therefore, the ball of laying between support blind hole and axle blind hole can make support make a certain amount of universal movement, support can drive retractor device to make universal movement, and retractor device can drive seal head to make a certain amount of universal movement.The seal head that can make a certain amount of universal movement can compensate the error of fixture clamping cylinder and the mismachining tolerance of cylinder itself, makes seal head hole or the passage of sealing cylinder exactly, and then ensures the accuracy of cylinder airtight test result, has useful technique effect.

As a further improvement on the present invention, described guide piece comprises guiding trestle and guide holder, the axial displacement that described guide holder attaching nut can restrictive axes.

As a further improvement on the present invention, also comprise and be arranged on the wheel and rack of end, the cylinder that drives tooth bar to move, described stationary installation is bearing arrangement.Under the acting in conjunction of wheel and rack, cylinder and bearing arrangement, the motion that can rotate in a circumferential direction of whole plug mechanism.

As a further improvement on the present invention, also comprise that being arranged on bearing arrangement approaches the stop means that seals first side, described stop means comprises limited block, be arranged on backing pin, block on limited block, be arranged on the adjustment screw assembly on block, described limited block becomes convex shape, described backing pin is arranged on two shoulders of convex shape limited block, described block is fixed in air-tightness detection device main body, and described limited block is fixed on plug mechanism.So design can rotate in a circumferential direction plug mechanism movement limit in certain scope.Plug mechanism rotation, limited block rotation, the backing pin on limited block touches the adjustment screw assembly on block, and rotatablely moving of plug mechanism is blocked.

As a further improvement on the present invention, described tooth bar is connected with cylinder with floating junction by tip connecting block.

Brief description of the drawings

Below in conjunction with accompanying drawing, the present invention is described further:

Fig. 1 is the structural representation that a kind of cylinder impermeability of the present invention detects the plug mechanism of use;

Fig. 2 is the view of observing plug mechanism gained in Fig. 1 from left side;

Fig. 3 is A part enlarged drawing in Fig. 1;

Fig. 4 is the view of observing A part gained in Fig. 3 from left side.

Symbol description in figure:

10-seal head;

20-retractor device;

30-locating device;

40-stationary installation;

51-support; 52-ball; 53-axle; 54-guide piece; 541-guiding trestle; 542-guide holder;

61-gear; 62-tooth bar; 63-cylinder;

71-limited block; 711-backing pin; 72-block; 721-adjusts screw assembly.

Embodiment

As shown in Figures 1 to 4, cylinder impermeability detects the plug mechanism of use, comprise seal head 10, can be for the flexible retractor device 20 of seal head 10, for the locating device 30 of seal head 10 axial location, plug mechanism is arranged on to the bearing arrangement in air-tightness detection device main body.Also comprise the univesal wheelwork being connected with retractor device 20, described univesal wheelwork comprises support 51, ball 52, axle 53, guide piece 54, described support 51 is axially offering the blind hole of bottom for taper, described axle 53 one end offer tapered blind hole, described axle 53 inserts support 51 blind holes, described ball 52 is placed between support 51 blind holes and axle 53 blind holes, coordinating between described axle 53 and support 51 blind holes is clearance fit, and described guide piece 54 can make axle 53 do the axially-movable of certain displacement amount.Wherein, described guide piece 54 comprises guiding trestle 541 and guide holder 542, the axial displacement that described guide holder 542 attaching nuts can restrictive axes 53.

Plug mechanism of the present invention also comprises the gear 61 that is arranged on end and tooth bar 62, drive cylinder 63 that tooth bar 62 moves, be arranged on bearing arrangement approaches the stop means of the first side of sealing.Described tooth bar 62 is connected with cylinder 63 with floating junction by tip connecting block.Described stop means comprises limited block 71, be arranged on backing pin 711, block 72 on limited block 71, be arranged on the adjustment screw assembly 721 on block 72,71 one-tenth convex shapes of described limited block, described backing pin 711 is arranged on two shoulders of convex shape limited block 71, described block 72 is fixed in air-tightness detection device main body, and described limited block 71 is fixed on plug mechanism.Under the acting in conjunction of gear 61 and tooth bar 62, cylinder 63 and bearing arrangement, the motion that can rotate in a circumferential direction of whole plug mechanism.Plug mechanism rotation, limited block 71 rotates, and the backing pin 711 on limited block 71 touches the adjustment screw assembly 721 on block 72, and rotatablely moving of plug mechanism is blocked.

Above content is only preferred embodiments of the present invention, for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, and this description should not be construed as limitation of the present invention.

Claims (5)

1. the plug mechanism of a cylinder impermeability detection use, comprise seal head (10), can supply the flexible retractor device (20) of seal head (10), for the locating device (30) of seal head (10) axial location, plug mechanism is arranged on to the stationary installation (40) in air-tightness detection device main body, it is characterized in that: also comprise the univesal wheelwork being connected with retractor device (20), described univesal wheelwork comprises support (51), ball (52), axle (53), guide piece (54), described support (51) is axially offering the blind hole of bottom for taper, described axle (53) one end offers tapered blind hole, described axle (53) inserts support (51) blind hole, described ball (52) is placed between support (51) blind hole and axle (53) blind hole, coordinating between described axle (53) and support (51) blind hole is clearance fit, described guide piece (54) can make axle (53) do the axially-movable of certain displacement amount.
2. cylinder impermeability as claimed in claim 1 detects the plug mechanism of use, it is characterized in that: described guide piece (54) comprises guiding trestle (541) and guide holder (542) axial displacement that described guide holder (542) attaching nut can restrictive axes (53).
3. cylinder impermeability as claimed in claim 1 detects the plug mechanism of use, it is characterized in that: also comprise and be arranged on the gear (61) of end and the cylinder (63) that tooth bar (62), driving tooth bar (62) move, described stationary installation (40) is bearing arrangement.
4. cylinder impermeability as claimed in claim 3 detects the plug mechanism of use, it is characterized in that: also comprise that being arranged on bearing arrangement approaches the stop means that seals first side, described stop means comprises limited block (71), be arranged on the backing pin (711) on limited block (71), block (72), be arranged on the adjustment screw assembly (721) on block (72), described limited block (71) becomes convex shape, described backing pin (711) is arranged on two shoulders of convex shape limited block (71), described block (72) is fixed in air-tightness detection device main body, described limited block (71) is fixed on plug mechanism.
5. cylinder impermeability as claimed in claim 3 detects the plug mechanism of use, it is characterized in that: described tooth bar (62) is connected with cylinder (63) with floating junction by tip connecting block.
CN201410177793.4A 2014-04-29 A kind of plug mechanism of cylinder air-leakage test CN104006928B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410177793.4A CN104006928B (en) 2014-04-29 A kind of plug mechanism of cylinder air-leakage test

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410177793.4A CN104006928B (en) 2014-04-29 A kind of plug mechanism of cylinder air-leakage test

Publications (2)

Publication Number Publication Date
CN104006928A true CN104006928A (en) 2014-08-27
CN104006928B CN104006928B (en) 2016-11-30

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201028986Y (en) * 2006-12-28 2008-02-27 重庆宗申技术开发研究有限公司 Air-tightness detecting machine for engine cylinder head assembly
CN201486958U (en) * 2009-03-31 2010-05-26 上海人豪液压技术有限公司 Combined screw plug
JP2012076785A (en) * 2010-09-30 2012-04-19 Yoshino Kogyosho Co Ltd Container with moving inner plug and method of inspecting leakage of the container
JP2013024556A (en) * 2011-07-14 2013-02-04 Masashi Onodera Test plug and stop cock spindle
CN103528761A (en) * 2013-10-24 2014-01-22 安徽江淮汽车股份有限公司 Internal expansion block sealing device for hole
CN203532231U (en) * 2013-09-23 2014-04-09 合肥凯创汽车零部件有限公司 Plug for engine water pump hole leakage tests

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201028986Y (en) * 2006-12-28 2008-02-27 重庆宗申技术开发研究有限公司 Air-tightness detecting machine for engine cylinder head assembly
CN201486958U (en) * 2009-03-31 2010-05-26 上海人豪液压技术有限公司 Combined screw plug
JP2012076785A (en) * 2010-09-30 2012-04-19 Yoshino Kogyosho Co Ltd Container with moving inner plug and method of inspecting leakage of the container
JP2013024556A (en) * 2011-07-14 2013-02-04 Masashi Onodera Test plug and stop cock spindle
CN203532231U (en) * 2013-09-23 2014-04-09 合肥凯创汽车零部件有限公司 Plug for engine water pump hole leakage tests
CN103528761A (en) * 2013-10-24 2014-01-22 安徽江淮汽车股份有限公司 Internal expansion block sealing device for hole

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
翟皓颖 等: "气缸检测的研究", 《天津职业技术师范学院学报》 *

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Applicant before: Xionghua Machinery (Suzhou) Co., Ltd.

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