CN202267430U

CN202267430U - Engine valve guide pipe abrasion measuring device

Info

Publication number: CN202267430U
Application number: CN2011203992509U
Authority: CN
Inventors: 范炳良; 陈庆樟; 孟杰
Original assignee: Changshu Institute of Technology
Current assignee: Changshu Institute of Technology
Priority date: 2011-10-19
Filing date: 2011-10-19
Publication date: 2012-06-06
Anticipated expiration: 2021-10-19

Abstract

The utility model discloses an engine valve guide pipe abrasion measuring device, and belongs to the technical field of overhauling of engines. The device comprises an adjusting cross rod, an adjusting vertical rod, a measuring meter, a V-shaped chuck, a fixed seat, a vertical rod adjusting sleeve and a lower adjusting mechanism, wherein a telescopic rod sleeve fixing mechanism is arranged on a rod body of the adjusting cross rod, an adjusting vertical rod fixed seat is connected to one end of the adjusting cross rod facing the adjusting vertical rod, and the adjusting vertical rod fixed seat is clamped on the adjusting vertical rod; the measuring meter with a measuring meter telescopic rod is fixed on the telescopic rod sleeve fixing mechanism; the V-shaped chuck is fixed at the end of the measuring meter telescopic rod; the fixed seat is arranged on a rod body of the adjusting vertical rod; the vertical rod adjusting sleeve is connected with the adjusting vertical rod; and the lower adjusting mechanism is connected with the vertical rod adjusting sleeve and corresponds to the lower part of the adjusting cross rod. The utility model has the advantages that: the device has good adaptability to indirect measurement of abrasion of cylinder cover valve guide pipes of different forms; and the device has a simple integral structure, is convenient to operate, and can be applied to various engine repair departments.

Description

Engine valve guide abrasion amount measuring device

Technical field

The utility model belongs to the tune-up technical field, is specifically related to a kind of engine valve guide abrasion amount measuring device, is used for to the detection of engine valve at valve guide bushing rolling momentum, to know the degree of wear of engine valve guide

Background technology

such as industry the reason of knowledge, valve guide bushing had both guaranteed that valve did straight reciprocating motion, and valve and valve seating can correctly be fitted, and between valve stem and cylinder head, played conductive force again.Generally leave suitable gap (deciding) between valve stem and the valve guide bushing, make the valve stem can free movement in conduit according to engine model.When valve stem moves in conduit, only depend on the machine oil that valve actuating mechanism splashes to be lubricated, easy abrasion, the typical wearing and tearing situation of valve guide bushing are maximum in the upper and lower end wearing and tearing, are oblate hydraucone shape.Therefore valve guide bushing is the consumable accessory in the engine, when valve guide bushing is overhauled, needs to rely on pick-up unit to detect the wear extent of valve guide bushing, when valve guide bushing may wear to limit degree, should in time change.

It is main but be not limited to following several kinds that the method for the valve guide bushing degree of wear is measured in : one is to use the special-purpose internal diameter measuring instrument of band dial gauge to measure the valve guide hole footpath; Specifically: according to the nominal size of valve guide bushing; With outside micrometer " to zero "; In the insertion valve guide bushing, directly the measuring guide internal diameter compares institute's measured value and normal inner diameter; The 2nd, illustrate like Fig. 3; Through the tolerance clearance between measurement valve stem and conduit, the abrasion condition of indirect measuring guide, specifically: a side that meter 3 (dial gauge) is fixed in the cavaera of cylinder head; Valve is inserted in the conduit; And promote valve disc to maximum lift position or by technical requirement highly (each type differs), making meter 3 is that the measuring staff of dial gauge touches the valve disc edge, the oscillating quantity of measurement valve disc; The 3rd, adopt telescopic or bulb separation formula weight appearance detects.

no matter adopt which kind of mode to detect if the tolerance clearance of valve stem and valve guide bushing surpasses operating limit value (the operating limit value of each machine is required to confirm by maintenance technique), then must be changed.

Its tolerance clearance with valve stem is increased, swing when causing valve work, be not closed completely, cause gas leakage.During excesssive gap between valve stem and the valve guide bushing; Thermal conduction capability to valve stem descends on the one hand, and particularly the exhaust valve generation is overheated when high-temperature gas is scurried into valve stem and conduit gap, accelerated wear test; Can cause lubricating oil sintering in the conduit when serious, make valve stuck; Make air and machine oil suck the firing chamber on the other hand, cause the variation of air-fuel ratio, influence petrolic work, unstable idle speed, Oil Consumption increase, spark plug contamination and carbon distribution etc. are increased the weight of; Again on the one hand, the guide effect of valve stem and valve guide bushing is descended, with the concentricity of valve seating, cause and leak gas in the time of can not guaranteeing air valve drop, the reduction engine power performance, even can not work; And then on the one hand,, except bringing aforementioned drawback, also possibly cause mechanical accident if the tolerance clearance between valve stem and the valve guide bushing seriously transfinites, diesel engine is more so.Because during excesssive gap, valve motion has lost due guiding constraint, especially when the serious irregular wear of valve rocker end; The valve stem tail end is produced bigger lateral thrust; Valve stem makes the valve disc plane inclination in the conduit medium dip, interferes with the motion generation of piston.</b>

In the detection method to the valve guide bushing wearing and tearing that are mentioned in the above, first method " his-and-hers watches " is consuming time; Technical requirement to the operative employee is higher; Measurement point is many and still can not reflect the actual wear situation of conduit comprehensively, i.e. the greatest measure of conduit wearing and tearing difficulty measures, and is prone to cause erroneous judgement.Above-mentioned second method is because the external cylindrical surface thickness (also claiming valve head margin) of valve head is thinner; Be about 1-3 ㎜; And meter 3 to be the measuring head of dial gauge be generally sphere, both form a contact, thereby are prone in contact process, cause skew and slippage; In addition, in the measurement that valve rocks, its movement locus is similar to the circular motion track, so dial gauge measuring head contact acts on the arc surface (line), very easily occur sliding partially, even the jumping of quivering, cause detection difficult; Moreover the dial gauge measuring head is difficult for aligning the center of valve head, be prone to cause measuring process unreliable, unstable, reading is incorrect, and then has influence on measurement correctness.Above-mentioned the third method adopter is very few, is not employed basically in the engine maintenance industry.

In disclosed Chinese patent document, Granted publication number is CN201476736U, and a kind of " engine breathing guide hole comprehensive detection device " is provided .This patent scheme judges with ending, lead to feeler gauge whether the engine valve guide hole is qualified; Be applicable to the engine production factory that specifications and models are more single; Detection for the valve guide hole that is oblate hydraucone shape that has worn and torn then can not be used.Therefore, this scheme existence can not be the shortcoming such as the use of motor vehicle repair department large in number and widely distributed, that model is many

Summary of the invention

The task of the utility model be to provide a kind of help easily tested valve and valve guide bushing location, particularly valve head used with the location of short transverse ensure accuracy of detection, help in testing process, embodying and well contact with valve head external cylindrical surface and keep centering and use the measuring head of avoiding meter and slide partially and even quiver jumping and use the carrying out smoothly and fast of guarantee surveying work, be of value to and improve accommodation and have that to be good at embodying structure terse and be suitable for the engine valve guide abrasion amount measuring device such as the application of Mechanical Help department.

The task of the utility model is accomplished like this; A kind of engine valve guide abrasion amount measuring device; Comprise an adjustment cross bar and an adjustment vertical rod; On the body of rod of adjustment cross bar, be equipped with expansion link cover fixed mechanism movably, and connected an adjustment vertical rod holder at the adjustment cross bar towards an end of adjustment vertical rod, adjustment vertical rod holder is clamped in the adjustment vertical rod movably; One has the meter of meter expansion link, and this meter is fixed on the said expansion link cover fixed mechanism; One V-clevis, this V-clevis is fixed on the end of said meter expansion link; One holder, this holder are provided on the body of rod of said adjustment vertical rod movably; One vertical rod adjustment cover, this vertical rod adjustment cover is connected with the adjustment vertical rod; Adjusting mechanism once, this time adjusting mechanism is connected with said vertical rod adjustment cover, and corresponding to the below of described adjustment cross bar.

are in one of the utility model concrete embodiment; Described expansion link cover fixed mechanism comprises first, second a tong-test ammeter seat and a trip bolt; The first tong-test ammeter seat is arranged on the body of rod of said adjustment cross bar movably; The second tong-test ammeter seat is formed on the first tong-test ammeter seat, and trip bolt is provided on the second tong-test ammeter seat and with the first tong-test ammeter seat and fixes, and described meter has an expansion link cover; This expansion link cover is clamped in the U-shaped hole slot on the second tong-test ammeter seat, and described meter expansion link passes the expansion link cover.

in another concrete embodiment of the utility model, described meter is a dial gauge.

In another concrete embodiment of the utility model, the shape of described first, second tong-test ammeter seat takes the shape of the letter U .

In another concrete embodiment of the utility model, the shape of described adjusting vertical rod holder takes the shape of the letter U , and is equipped with a gib screw.

also have among the concrete embodiment the utility model, and the base portion of described V-clevis is fixed through a chuck gib screw 41 and an end end face of said meter expansion link.

the utility model more and among concrete embodiment, the both sides of described holder respectively constitute a location-plate, offer the adjustment groove on each location-plate, each is adjusted and is equipped with an adjustment gib screw on the groove.

the utility model so that concrete embodiment in, the inwall of described vertical rod adjustment cover is provided with internal thread, and said adjustment vertical rod is designed with external thread towards an end of vertical rod adjustment cover, external thread matches with internal thread.

are at again more and among concrete embodiment of the utility model; Described adjusting mechanism down comprises sliding sleeve, swivel nut and vertically adjusts screw rod; Sliding sleeve is fixed on described vertical rod adjustment up or down and puts; This sliding sleeve is extended with an adjustable plate towards a side of swivel nut, and swivel nut revolves with thread fiting mode and fits on the adjustment screw rod, and is extended with a bottom plate at this swivel nut towards a side of sliding sleeve; This bottom plate is connected with described adjustable plate, and the adjustment screw rod is corresponding with described V-clevis.

at again and then among concrete embodiment of the utility model, offers a regulating tank at the length direction of said adjustable plate, and described bottom plate is connected with regulating tank through screw.

The technical scheme that the utility model provides is by the control that realizes valve disc is leant out height that cooperates of V-clevis and following adjusting mechanism, satisfies the valve disc maximum lift position or by the requirement for height of technical requirement, thereby guaranteed accuracy of detection; V-clevis can touch with good subsides of valve head periphery, sliding partially and even the jumping situation of quivering can not occur, thereby can ensure carrying out smoothly and fast of surveying work; The shape of V-clevis is applicable to the detection of the different-diameter valve head amount of rocking; Expansion link cover fixed mechanism can move on the adjustment cross bar, and cooperates the second tong-test ammeter seat can make V-clevis obtain required any measuring position with respect to the deflection of the first tong-test ammeter seat; The adjustment that vertical rod adjustment cover can be realized short transverse with respect to the adjustment vertical rod is to satisfy the detection needs of different-thickness cylinder cap; The relative position of adjustable plate and bottom plate can be adjusted, and vertically adjusts screw rod and adjust with the adjustment that slides over the position that vertical rod adjustment puts, and has therefore satisfied the detection requirement to the valve guide bushing wear extent of different in width cylinder cap simultaneously.The utlity model has the adaptability that the multi-form head valve conduit of desirable reply wear extent is measured indirectly; One-piece construction is simple, and is easy to operate, can be suitable for all kinds of engine overhaul department and use.

Description of drawings

Fig. 1 is the example structure figure of the utility model.

Fig. 2 is the application examples synoptic diagram of the utility model.

Fig. 3 is engine valve guide abrasion amount measuring schematic representation of apparatus and application examples synoptic diagram in the prior art.

Embodiment

can be expressly understood the technical spirit and the beneficial effect of the utility model more for the auditor that the makes Patent Office especially public; The applicant general elaborates with the mode of embodiment below; But the description to embodiment all is not the restriction to the utility model scheme, any according to the utility model design done only for pro forma but not substantial equivalent transformation all should be regarded as the technical scheme category of the utility model.

see also Fig. 1, and for the ease of the public's understanding, the applicant also shows valve 8 and valve guide bushing 9 in Fig. 1.By shown in Figure 1; Provide a shape of cross section and be preferably circular adjustment cross bar 1; The expansion link cover fixed mechanism 11 that is equipped with removable on the body of rod of this adjustment cross bar 1 (move left and right), this expansion link cover fixed mechanism 11 comprises that the shape of first, second tong-test ammeter seat 111,112 and trip bolt 113, the first tong-test ammeter seats 111 takes the shape of the letter U (also can claim the shape of a hoof); Be nested with on adjustment cross bar 1; The shape of the second tong-test ammeter seat 112 takes the shape of the letter U (also can claim the shape of a hoof), is flat on the first tong-test ammeter seat 111, and trip bolt 113 is provided on the second tong-test ammeter seat 112 and is threaded in the first tong-test ammeter seat 111.Constitute a thread head 13 at adjustment cross bar 1 towards an end of adjustment vertical rod 2; Mode with threaded engagement on this thread head 13 is equipped with the adjustment vertical rod holder 12 that a shape is similarly U-shaped; On this adjustment vertical rod holder 12, offer fixing screw hole 122, be equipped with gib screw 121 on the fixing screw hole 122.In order to prevent that adjusting vertical rod holder 12 gets loose and even escape in adjustment cross bar 1, therefore adopts the fastening screw nut 131 (also claiming stop nut) that matches with thread head 13 to limit.

are that illustrated upper end is inserted with adjustment vertical rod holder 12 at an end of adjustment vertical rod 2; By aforesaid gib screw 121 reliable grip; In order to avoid come off; The other end in adjustment vertical rod 2 is that the lower end is processed with external thread 21, and the effect of external thread 21 is to be used for connecting with the following vertical rod adjustment cover 6 that also will mention, and realizes the adjusting of short transverse.

(taking on) filled the post of in by dial gauge meter 3 is fixed on the aforesaid expansion link cover fixed mechanism 11 with horizontality, specifically is to make it to tighten up simultaneously on adjustment cross bar 1 with the first tong-test ammeter seat 111 in the U-shaped hole slot of meter expansion link cover 32 with this meter 3 second tong-test ammeter seat 112 that is placed in expansion link cover fixed mechanism 11 and through trip bolt 113.The meter expansion link 31 of meter 3 passes expansion link cover 32, and is fixed with a V-clevis 4 in its end, is shown by Fig. 1, and the bottom of this V-clevis 4 uses the chuck gib screw 41 and the end face of meter expansion link 31 to fix.This shape of the V-clevis 4 of 60o angle can be suitable for the measurement of valve guide bushing 9 of engine of the head diameter 25-50 ㎜ of valve 8, and applicable to the wear measurement of the valve guide bushing of the hydraulic tappet formula valve actuating mechanism of putting on gasoline engine, diesel engine and rocker-arm valve distribution mechanism or the cam.

are equipped with a holder 5 in aforesaid adjustment vertical rod 2; The particular location of this holder 5 can be according to the advancing or the position of exhaust branch pipe bolt hole and confirm through moving in the adjustment vertical rod 2 of cylinder cap side, confirms that the back adopts dog screw 52 fixing.Shown in figure, the both sides of holder 5 respectively are extended with a location-plate 51, offer an adjustment groove 511 on each location-plate 51, each adjust be equipped with on the groove 511 one with the advancing or the adjustment gib screw 5111 of exhaust branch pipe bolt hole screw thread coupling of cylinder cap side.

The inwall of the vertical rod adjustment cover of having mentioned above 6 is designed with internal thread 61; The lower end of aforesaid adjustment vertical rod 2 probes in the vertical rod adjustment cover 6; And its external thread 21 is matched with internal thread 61, thereby vertical rod adjustment cover 6 is connected with adjustment vertical rod 2.

once adjusting mechanism 7 connect on vertical rod adjustment cover 6; This time adjusting mechanism 7 comprises sliding sleeve 71, swivel nut 72 and vertically adjusts screw rod 73; Sliding sleeve 71 is fixing with vertical rod adjustment cover 6 by sliding sleeve gib screw 712; And can on vertical rod adjustment cover 6, move, sliding sleeve 71 is extended with an adjustable plate 711 towards a side of swivel nut 72 with horizontality, offers a regulating tank 7111 at the length direction of this adjustable plate 711.Swivel nut 72 threaded engagement are vertically being adjusted on the screw rod 73; And it is spacing by stop nut 731; This swivel nut 72 is extended with a bottom plate 721 with horizontality equally towards a side of sliding sleeve 71, and the end of this bottom plate 721 is connected with adjustable plate 711 in the position corresponding to regulating tank 7111 through screw 7211.Shown in figure, it is vertically parallel with aforesaid vertical rod adjustment cover 6 vertically to adjust screw rod 73, and adjustable plate 711 and bottom plate 721 are laterally parallel with aforesaid adjustment cross bar 1, and it is also corresponding with aforesaid V-clevis 4 vertically to adjust screw rod 73.

are vertically adjusted screw rod 73 and are contacted with valve stem 82 end faces of valve 8 towards an end end face of valve guide bushing 9 by shown in Figure 1, and the head periphery 81 of valve 8 touches with the inwall subsides of V-clevis 4.

are asked for an interview Fig. 2 and are combined Fig. 1; In Fig. 2, illustrated the cylinder cap 10 of engine; In the time will measuring to the degree of wear of valve guide bushing 9; The holder 5 of the utility model is fixing with cylinder cap 10 through adjustment gib screw 5111, and cover 6 is adjusted in vertical rod adjusted, and the position of expansion link cover fixed mechanism 11 on adjustment cross bar 1 adjusted; Use satisfied vertical adjustment screw rod 73 of adjusting mechanism 7 down and contact, and the head periphery 81 of valve 8 is contacted with V-clevis 4 with valve stem 82 end faces of valve 8.If it is not in place to find that valve 8 heads lean out height and position, then can adopt sieve to criticize to aim at vertically the flat recess 732 of adjustment screw rod 73 bottoms to implement adjustment, and fastening screw nut 731 qualifications that match of employing and thread head 73.Promote the head periphery 81 of valve 8 back and forth along the axis direction of meter expansion link 31 by operating personnel; Cause 31 motions of meter expansion link through V-clevis 4; In this process; The maximum indicating value of pointer 33 indications of meter 3 and the difference of minimum indicating value are rocks value, thereby predicts the wear condition of valve guide bushing 9, confirms whether to change

Claims

1. a kind of engine valve guide abrasion amount measuring device; It is characterized in that comprising an adjustment cross bar (1) and an adjustment vertical rod (2); On the body of rod of adjustment cross bar (1), be equipped with expansion link cover fixed mechanism (11) movably; And connected an adjustment vertical rod holder (12) at adjustment cross bar (1) towards an end of adjustment vertical rod (2), adjustment vertical rod holder (12) is clamped in the adjustment vertical rod (2) movably; One has the meter (3) of meter expansion link (31), and this meter (3) is fixed on the said expansion link cover fixed mechanism (11); One V-clevis (4), this V-clevis (4) is fixed on the end of said meter expansion link (31); One holder (5), this holder (5) are provided on the body of rod of said adjustment vertical rod (2) movably; One vertical rod adjustment cover (6), this vertical rod adjustment cover (6) is connected with adjustment vertical rod (2); Adjusting mechanism (7) once, this time adjusting mechanism (7) is connected with said vertical rod adjustment cover (6), and corresponding to the below of described adjustment cross bar (1).

2. engine valve guide abrasion amount measuring device according to claim 1; It is characterized in that described expansion link cover fixed mechanism (11) comprises first, second a tong-test ammeter seat (111,112) and a trip bolt (113); The first tong-test ammeter seat (111) is arranged on the body of rod of said adjustment cross bar (1) movably; The second tong-test ammeter seat (112) is formed on the first tong-test ammeter seat (111); Trip bolt (113) is provided in the second tong-test ammeter seat (112) and upward and with the first tong-test ammeter seat (111) fixes; Described meter (3) has an expansion link cover (32), and this expansion link cover (32) is clamped in the U-shaped hole slot on the second tong-test ammeter seat (112), and described meter expansion link (31) passes expansion link cover (32).

3. engine valve guide abrasion amount measuring device according to claim 1 and 2 is characterized in that described meter (3) is a dial gauge.

4. engine valve guide abrasion amount measuring device according to claim 2 is characterized in that the shape of described first, second tong-test ammeter seat (111,112) takes the shape of the letter U.

5. engine valve guide abrasion amount measuring device according to claim 1 is characterized in that the shape of described adjusting vertical rod holder (12) takes the shape of the letter U, and is equipped with a gib screw (121).

6. engine valve guide abrasion amount measuring device according to claim 1 is characterized in that the base portion of described V-clevis (4) is fixed through a chuck gib screw (41) and an end end face of said meter expansion link (31).

7. engine valve guide abrasion amount measuring device according to claim 1; The both sides that it is characterized in that described holder (5) respectively constitute a location-plate (51); Offer adjustment groove (511) on each location-plate (51), each is adjusted and is equipped with an adjustment gib screw (5111) on the groove (511).

8. engine valve guide abrasion amount measuring device according to claim 1; The inwall that it is characterized in that described vertical rod adjustment cover (6) is provided with internal thread (61); And said adjustment vertical rod (2) is designed with external thread (21) towards an end of vertical rod adjustment cover (6), and external thread (21) matches with internal thread (61).

9. engine valve guide abrasion amount measuring device according to claim 1; It is characterized in that described adjusting mechanism (7) down comprises sliding sleeve (71), swivel nut (72) and vertically adjusts screw rod (73); Sliding sleeve (71) is fixed on the described vertical rod adjustment cover (6) up or down; This sliding sleeve (71) is extended with an adjustable plate (711) towards a side of swivel nut (72); Swivel nut (72) revolves with thread fiting mode and fits on the adjustment screw rod (73); And be extended with a bottom plate (721) at this swivel nut (72) towards a side of sliding sleeve (71), this bottom plate (721) is connected with described adjustable plate (711), and adjustment screw rod (73) is corresponding with described V-clevis (4).

10. Engine valve guide abrasion amount measuring device according to claim 9 is characterized in that offering a regulating tank (7111) at the length direction of said adjustable plate (711), and described bottom plate (721) is connected with regulating tank (7111) through screw (7211)