CN205957943U - Engine cylinder footpath measuring device - Google Patents

Abstract

The utility model belongs to the technical field of engine cylinder detects the instrument technique and specifically relates to an engine cylinder footpath measuring device, including the last body of rod, the lower body of rod, a step motor, the 2nd step motor, horizontal support shell and cylinder diameter measurement element, it includes upper boom main part, motor mount and adjusts the boss to go up the body of rod, the turbine has on the outer peripheral face of upper boom main part, the upper end of upper boom main part is provided with the spirit level, be connected with at least three group's support group spares on the horizontal support shell, measuring device still includes angle sensor and interior fluted disc, the coaxial coupling has worm, worm and turbine meshing on a step motor's the output shaft, the body of rod includes lower beam main part and test position down, has the rack on the outer peripheral face of lower beam main part, and the coaxial coupling has gear, wheel and rack meshing on the 2nd step motor's the output shaft, have the measuring aperture in the test position, cylinder diameter measurement element sets up in the measuring aperture. The utility model discloses can measure the multiunit data on the different cross -sections in succession, measurement accuracy is high and degree of automation is high.

Description

Engine cylinder calipers

Technical field

This utility model is related to a kind of cylinder detection instrument, especially a kind of engine cylinder calipers, uses To analyze cylinder inter deterioration situation.

Background technology

The measurement of engine air cylinder bore is the conventional project of automotive check, for analyzing cylinder inter deterioration shape Condition, is also the important skill that auto repair personnel must grasp.This technical ability is not only paid attention to by vast auto repair personnel, It is the examination of car mechanic's job qualification sheet and the important test item of car mechanic working qualification card examination.

At present, the common tool of electromotor inner diameter measurement is mechanical type bore gauge.During measurement, first with micrometer caliper (micrometer) proofreads bore gauge, subsequently chooses upper, middle and lower three section of cylinder, is measured using bore gauge substantially mutual respectively Two vertical diameters (cylinder diameter), finally carry out calculating circularity and cylindricity using formula.

When using mechanical type bore gauge measurement cylinder diameter, there is problems with：(1) micrometer caliper is utilized to proofread bore gauge When, the forward and backward two ends of bore gauge carefully should be positioned in micrometer caliper for operator, again hundred on adjustment bore gauge Divide table, not only operating difficultiess, and easily lead to the bore gauge proofreaded inaccurate.(2) operator shake before and after utilizing arm Dynamic bore gauge, during the vertical position of searching table bar, due to the impact of anthropic factor, there is certain error in the determination of vertical position, Cause cylinder inner diameter measurement inaccurate.(3) when reading dial gauge data, operator will be in conjunction with the rotation of little indicator Initial position when direction and rotation lattice number, the direction of rotation of big indicator and rotation lattice number and bore gauge school zero starts to calculate Machine cylinder bore diameter, calculating process is complicated, and easily makes a mistake.(4) because measuring method is complicated, therefore each for cylinder Section, only chooses the measured value of two orthogonal diameters to characterize cylinder bore diameter, is accordingly calculated, measurement data is few, Precision is low.

Utility model content

The purpose of this utility model is to overcome measurement cylinder complex operation in prior art, the low problem of precision, And provide one kind can continuously measure engine air cylinder bore, measure simple to operate, high precision, direct electron can read measurement number According to engine cylinder calipers.

This utility model solves its technical problem and be employed technical scheme comprise that：

A kind of engine cylinder calipers it is characterised in that described measurement apparatus include the body of rod, the lower body of rod, first Motor, the second motor, horizontal support shell and cylinder diameter measurement assembly；The described upper body of rod includes hollow tubular structure Upper boom main body, it is arranged on the motor fixing frame of described upper boom lower body part, is arranged on the regulation boss of described upper boom body exterior； Described second motor is fixed on described motor fixing frame；It is machined with tooth-shape structure on the outer peripheral face of described upper boom main body, Form turbine, described turbine is located above described regulation boss；Described horizontal support housing center portion has the described regulation of installation The mounting groove of boss, the diameter with diameter greater than described regulation boss of described mounting groove；The upper end of described upper boom main body is provided with Level indicator；It is connected with least three groups for described measurement apparatus are fixed on cylinder on described horizontal support shell Support component, makes described upper boom main body level by adjusting each support component；Described measurement apparatus also include described for measuring The sensor cluster of upper body of rod rotation, described sensor cluster includes the angular transducer being fixedly installed in described upper boom main body Internal gear disc with the downside being fixedly installed on described horizontal support shell；The measurement end of described angular transducer extend into described interior In fluted disc；It is coaxially connected with worm screw, described worm screw is engaged with described turbine on the output shaft of described first motor；Under described The body of rod includes the lower beam main body of hollow tubular structure and is arranged on test desk, described test desk and the institute of described lower beam main body lower end State lower beam body normal, the upper end of described lower beam main body has an elongated slot, and the bottom of described upper boom main body is set in described lower beam The top of main body, the interior in the hole of described upper boom main body has plush copper corresponding with described elongated slot, and described elongated slot is in described plush copper Move up and down under guide effect, so that the described upper body of rod can be moved to axial with the described lower body of rod and can not relatively rotate；Described Tooth-shape structure is machined with the outer peripheral face of lower beam main body, forms tooth bar, coaxially connected on the output shaft of described second motor There is gear, described gear is engaged with described tooth bar；There is in described test desk the measured hole with described lower beam body normal, described The central axis of measured hole is intersected with the central axis of described lower beam main body；Described cylinder diameter measurement assembly is arranged on described measured hole In, described cylinder diameter measurement assembly includes：With the gauge head module of described cylinder contact internal walls, by described gauge head module pressing Spring on the engine air inside wall of cylinder and the displacement transducer being fixedly connected with described gauge head module.

Further, described support component includes first support bar, second support bar and the 3rd support bar, described second The upper end of strut has elongated hole, and the upper end of described first support bar is bolted with described horizontal support shell, and described The upper end of two support bars passes through described elongated hole and the lower end of described first support bar to fix by bolt, and described 3rd support bar is Square, one of right-angle side of described 3rd support bar is bolted with the lower end of described second support bar.

Further, the medial surface of two right-angle sides of described 3rd support bar is additionally provided with rubber packing, adjustment Strut assembly, makes two right-angle sides of the 3rd support bar respectively horizontally and vertically, vertical right-angle side is close to cylinder Inwall on, the right-angle side of level is pressed on the upper edge of cylinder, by horizontal support shell and support component be fixed on send out On motivation cylinder.

Further, described support component is four groups, and described in four groups, support component circumference uniform distribution is fixed on described level and props up On support shell.

Further, described measured hole includes setting gradually laterally from the centre of described test desk the first hole, second Hole and the 3rd hole；Described gauge head module includes gauge head and be fixed on the push rod of described gauge head rear end, described push rod have bar portion and Pole cap, institute's displacement sensors are arranged on described first in the hole, and institute's displacement sensors and described pole cap are fixed, and described bar portion is worn Cross described second hole and be fixedly connected with the gauge head being arranged on described 3rd in the hole, the diameter in described second hole is less than described 3rd hole Diameter, the rear end of described gauge head is fixedly connected spring, and described spring is axially arranged along described measured hole, and described spring is by institute The front end stating gauge head is pressed on the inwall of cylinder.

Further, described cylinder diameter measurement assembly is two groups, is symmetricly set on the both sides of described lower beam main body.

Further, described cylinder diameter measurement assembly is three groups, and described in three groups, cylinder diameter measurement assembly is centered on lower beam main body Circumference uniform distribution.

Further, described first motor is fixed on the top of described horizontal support shell.

Further, described upper boom main body is further fixed on display and integrated circuit package, described display and integrated circuit Assembly includes display unit and integrated circuit unit, and described integrated circuit unit stores described angular transducer and described displacement passes The measurement data of sensor, calculates circularity and the cylindricity of engine air cylinder bore, and by described measurement data, circularity and cylinder Degree sends and shows to display unit.

Further, the connecting wire of described angular transducer pass through from the endoporus of described upper boom main body integrated with described Circuit unit connects, and the connecting wire of institute's displacement sensors is from top to bottom successively from the endoporus of described measured hole, lower beam main body Pass through with the endoporus of upper boom main body and be connected with described integrated circuit unit.

Compared with prior art, this utility model apparently has the advantages that：

1st, this utility model by eye-level instrument and adjustment support component, measurement apparatus is fixed on cylinder, First motor drives the upper body of rod and lower body of rod synchronous axial system, and the second motor drives the lower body of rod to move up and down, and is starting Make the lower body of rod drive cylinder diameter measurement assembly to rotate one week on one of section of machine cylinder, number is measured by integrated circuit acquisition According to and calculate, can continuously measure the multi-group data on a section and multigroup section is quickly measured, certainty of measurement high and from Dynamicization degree is high.

2nd, because mounting groove is with diameter greater than the diameter adjusting boss, the cylinder diameter measurement assembly making is in engine air cylinder interior During rotation, the upper body of rod level can move freely in mounting groove, to adjust the centrage of the upper body of rod, makes the centrage of the body of rod (i.e. the centrage of whole measurement apparatus) is overlapped it is ensured that the data of cylinder diameter measurement assembly measurement is with the centrage of cylinder The diameter of cylinder, rather than other chord lengths, measurement is accurately.

3rd, easily and fast to multiple horizontal cross-sections of cylinder, multiangular measurement, and display can be passed through Unit directly reads measurement result.

Brief description

With reference to the accompanying drawings and examples this utility model is further illustrated.

Fig. 1 is embodiment one integrated model schematic diagram；

Fig. 2 is body of rod structural representation in embodiment one；

Fig. 3 is embodiment one horizontal support outer casing construction drawing；

Fig. 4 is A-A sectional view in Fig. 3；

Fig. 5 is that embodiment one adjusts boss overlook direction schematic diagram during horizontal movement in mounting groove；

Fig. 6 is that embodiment one adjusts boss main view direction schematic diagram during horizontal movement in mounting groove；

Fig. 7 is embodiment one sensor cluster main view connection diagram；

Fig. 8 is that embodiment one sensor cluster overlooks connection diagram；

Fig. 9 is embodiment one cylinder diameter measurement assembly connection diagram；

Figure 10 is embodiment two horizontal support shell structure figure；

Figure 11 position embodiment three test desk schematic diagram.

In figure, 1, the upper body of rod, 1-1, upper boom main body, 1-11, plush copper, 1-12, sensor mounting hole, 1-2, motor are fixed Frame, 1-3, adjusts boss, 1-4, turbine, and 2, the lower body of rod, 2-1, lower beam main body, 2-2, test desk, 2-21, measured hole, 2-211, First hole, 2-212, the second hole, 2-213, the 3rd hole, 2-3, tooth bar, the 3, first motor, the 4, second motor, 5, water Flat support housing, 5-1, mounting groove, 5-2, support component erecting bed, 6, support component, 6-1, first support bar, 6-2, second Strut, 6-21, elongated hole, 6-3, the 3rd support bar, 6-4, rubber packing, 7, cylinder diameter measurement assembly, 7-1, spring, 7-2, push rod, 7-21, pole cap, 7-22, bar portion, 7-3, displacement transducer, 7-4, gauge head, 8, level indicator, 9, sensor cluster, 9-1, angle pass Sensor, 9-2, internal gear disc, 10, worm screw, 11, gear, 12, display unit, 13, integrated circuit unit.

Specific embodiment

In order that technical problem, technical scheme and beneficial effect that this utility model is solved become more apparent, below In conjunction with drawings and Examples, this utility model is further elaborated.It should be appreciated that described herein be embodied as Example only in order to explain this utility model, is not used to limit this utility model.

Of the present utility model description in it is to be understood that term " radially ", " axial ", " on ", D score, " top ", The orientation of instruction such as " bottom ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, merely to just In description this utility model and simplification description, rather than the device of instruction or hint indication or element must have specific side Position, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.In description of the present utility model In, unless otherwise stated, " multiple " are meant that two or more.

In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace Dress ", " setting ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly Connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary.For the ordinary skill in the art, Concrete meaning in this utility model for the above-mentioned term can be understood as the case may be.

The internal diameter of the cylinder described in this utility model is the inside diameter of cylinder.This utility model Described in cylinder diameter be cylinder internal diameter.

Embodiment one

Engine cylinder calipers as shown in Fig. 1-Fig. 9, including the upper body of rod 1, the lower body of rod 2, the first motor 3, Second motor 4, horizontal support shell 5 and cylinder diameter measurement assembly 7.

In conjunction with Fig. 1, Fig. 2 and Fig. 7, the upper body of rod 1 includes upper boom main body 1-1 of hollow tubular structure, is arranged on upper boom main body The motor fixing frame 1-2 of the 1-1 bottom and regulation boss 1-3 being arranged on outside upper boom main body 1-1, the second motor 4 is fixing On motor fixing frame 1-2；It is machined with tooth-shape structure on the outer peripheral face of upper boom main body 1-1 on top adjusting boss 1-3, formed Turbine 1-4；Sensor mounting hole 1-12 is also had on upper boom cylinder.In conjunction with Fig. 1, Fig. 4, Fig. 5 and Fig. 6, in horizontal support shell 5 Center portion has installs the mounting groove 5-1 adjusting boss 1-3, the diameter with diameter greater than regulation boss 1-3 of mounting groove 5-1；Upper boom The upper end of main body 1-1 is provided with level indicator 8；Referring to Fig. 3, horizontal support shell 5 have uniform around its center axis circumference Four support component erecting bed 5-2, four groups of support components 6 are separately fixed on four support component erecting bed 5-2.

As shown in figure 1, support component 6 includes first support bar 6-1, second support bar 6-2 and the 3rd support bar 6-3 and rubber Glue liner 6-4, the upper end of second support bar 6-2 has elongated hole 6-21, the upper end of first support bar 6-1 and horizontal support shell 5 Support component erecting bed 5-2 be bolted, the upper end of second support bar 6-2 passes through elongated hole 6-21 and first by bolt The lower end of support bar 6-1 is fixed, and the 3rd support bar 6-3 is square, one of right-angle side and second of the 3rd support bar 6-3 The lower end of support bar 6-2 is bolted, and rubber packing 6-4 is pasted onto the inner side of the 3rd two right-angle sides of support bar 6-3.Twist Loose bolt can make to relatively rotate between each support bar, by being bolted to the diverse location of elongated hole 6-21, can adjust second The effective length of strut.Make upper boom main body 1-1 level by adjusting each support component 6, make two right angles of the 3rd support bar 6-3 Respectively horizontally and vertically, vertical right-angle side is close on the inwall of cylinder, and the right-angle side of level is pressed on and starts on side The upper edge of machine cylinder, measurement apparatus are fixed on cylinder.Rubber packing 6-4 avoids the 3rd support bar 6-3 and sends out Motivation cylinder rigid contact damages cylinder.

In conjunction with Fig. 1, Fig. 7 and Fig. 8 measurement apparatus also include the sensor cluster 9 for measuring the upper body of rod 1 rotation, sensor Assembly 9 includes the angular transducer 9-1 being fixedly installed in upper boom main body 1-1 and is fixedly installed under horizontal support shell 5 Internal gear disc 9-2 of side；Angular transducer 9-1 is arranged in sensor mounting hole 1-12 of upper boom main body 1-1, angular transducer 9- 1 measurement end extend in internal gear disc 9-2.

Referring to Fig. 1, the output shaft of the first motor 3 is coaxially connected with worm screw 10, worm screw 10 is engaged with turbine 1-4； The lower body of rod 2 includes lower beam main body 2-1 of hollow tubular structure and is arranged on the test desk 2-2 of lower beam main body 2-1 lower end, test desk 2-2 is vertical with lower beam main body 2-1, and the upper end of lower beam main body 2-1 has an elongated slot (not shown), the bottom set of upper boom main body 1-1 It is located at the top of lower beam main body 2-1, the interior in the hole of upper boom main body 1-1 has plush copper 1-11 corresponding with elongated slot, plush copper 1-11 is inserted Enter in elongated slot, one is that lower moving up and down of the body of rod 2 is play the guiding role, two is to make no relative between the body of rod 1 and the lower body of rod 2 turning Dynamic, the body of rod 1 in driving, the lower body of rod 2 is with the upper body of rod 1 synchronous axial system.Profile of tooth knot is machined with the outer peripheral face of lower beam main body 2-1 Structure, forms tooth bar 2-3, the output shaft of the second motor 4 is coaxially connected with gear 11, gear 11 is engaged with tooth bar 2-3.

Referring to Fig. 1 and Fig. 9, there is in test desk 2-2 the measured hole 2-21 vertical with lower beam main body 2-1, measured hole 2-21 Central axis intersect with the central axis of lower beam main body 2-1.

The present embodiment has two measured hole 2-21, and two measured hole 2-21 angles are 180 ° and (are symmetricly set on lower beam cylinder Both sides).Cylinder diameter measurement assembly 7 is arranged in measured hole 2-21, and cylinder diameter measurement assembly 7 includes：Connect with the engine air inside wall of cylinder Tactile gauge head module, be fixedly connected spring 7-1 on the engine air inside wall of cylinder for the gauge head module pressing with gauge head module Displacement transducer 7-3.

In the present embodiment, measured hole 2-21 includes the first hole 2- setting gradually laterally from the centre of test desk 2-2 211st, the second hole 2-212 and the 3rd hole 2-213；Gauge head module includes gauge head 7-4 and is fixed on the push rod 7-2 of gauge head 7-4 rear end, Push rod 7-2 has bar portion 7-22 and pole cap 7-21, and displacement transducer 7-3 is arranged in the first hole 2-211, displacement transducer 7-3 Fix with described pole cap 7-21, bar portion 7-22 is fixed through the second hole 2-212 and gauge head 7-4 being arranged in the 3rd hole 2-213 Connect, the diameter of the second hole 2-212 is less than the diameter of the 3rd hole 2-213, and the rear end of gauge head 7-4 is fixedly connected spring 7-1, spring 7-1 is axially arranged along measured hole 2-21's, and the front end of gauge head 7-4 is pressed on the inwall of cylinder spring 7-1.Specifically Ground, the motion of gauge head 7-4 is simply passed to displacement transducer 7-3 by push rod 7-2, and displacement transducer 7-3 perceives the position of gauge head 7-4 Move, the internal diameter of measurement cylinder.The effect of spring 7-1 is not only in that and for the gauge head 7-4 moment to be pressed on cylinder On inwall, and in the presence of spring 7-1, when the upper body of rod 1 rotates, the regulation boss 1-3 due to the upper body of rod 1 can be in level In the mounting groove 5-1 of support housing 5 level slide, so that the centrage of the body of rod 1 is overlapped with the centrage of cylinder it is ensured that The value that gauge head 7-4 is surveyed is diameter, rather than other chord length, referring to Fig. 5 and Fig. 6.

In the present embodiment, as shown in figure 1, display and integrated circuit package are further fixed on upper boom main body 1-1, show and collect Circuit unit is become to include display unit 12 and integrated circuit unit 13, integrated circuit unit 13 storage angular transducer 9-1 and position The measurement data of displacement sensor 7-3, calculates circularity and the cylindricity of engine air cylinder bore, and by measurement data, circularity and Cylindricity sends and shows to display unit 12.

In the present embodiment, referring to Fig. 1, the connecting wire of angular transducer 9-1 passes through and collection from the endoporus of upper boom main body 1-1 Circuit unit 13 is become to connect, the connecting wire of displacement transducer 7-3 is from top to bottom successively from measured hole 2-21, lower beam main body 2-1 Endoporus and upper boom main body 1-1 endoporus pass through be connected with integrated circuit unit 13.

Workflow of the present utility model is：

Cylinder diameter measurement assembly 7 is put in cylinder, unscrews the bolt in support component 6, adjust support group Each support member of part 6, the display of eye-level instrument 8, until the upper body of rod of level indicator 8 display 1 (i.e. whole measurement apparatus) is complete Full level, each bolt tightened in support component 6 makes measurement apparatus fix.

The initial position of cylinder diameter measurement assembly 7 is apart from cylinder upper surface 10mm right position, starts the first step Stepper motor 3, is driven by turbine and worm and drives upper boom body 1 and the lower body of rod 2 synchronous axial system, so that cylinder diameter measurement assembly 7 completes The measurement of multiple positions on one section.First motor 3 often makes a move, and angular transducer 9-1 can measure corresponding angle Degree, cylinder diameter measurement assembly 7 measures the internal diameter of the corresponding cylinder of this angle simultaneously.When the first motor 3 drives cylinder Footpath measurement assembly 7 rotates a circle after (i.e. 360 °), and the measurement in this section terminates.

Start the second motor 4, the lower body of rod 2 is driven under the guide effect of plush copper 1-11 by gear 11 rack gear Move downward, the lower body of rod 2 drives the synchronous section moving down into another needs measurement of the cylinder diameter measurement assembly 7 being arranged on its lower end, Subsequently, starting the first motor 3 makes cylinder diameter measurement assembly 7 rotate, and measures the engine air cylinder bore in this section.

And so on, until completing whole cylinder measurement.In view of the abrasion practical situation of cylinder, In the range of the 10mm of cylinder upper surface, and in the range of the 10mm of cylinder lower surface, because of compression ring phase of getting along well Contact, does not wear and tear, so set becoming suddenly hour when measurement inner diameter values, representing and not wearing and tearing, measurement process terminates.

Embodiment two

As shown in Figure 10, the present embodiment arranges three groups of support components 6, and on horizontal support shell 5, circumference is uniformly arranged three Individual support component 6 installation portion.

Embodiment three

As shown in figure 11, the present embodiment is provided with three groups of cylinder diameter measurement assemblies 7, and three groups of cylinder diameter measurement assemblies 7 are with lower beam main body Centered on circumference uniform distribution.Three groups of measured hole 2-21 of setting inside test desk 2-2.

Also there is in this utility model embodiment USB output interface, the data output of measurement is preserved.

In this utility model embodiment, level indicator 8 selects universal air-bubble level；First motor 3 and the second stepping Motor 4 all selects 8HS04 series biphase (four lines) composite stepper motor；Displacement transducer 7-3 selects PM miniature reset series Displacement transducer (precision 0.005mm)；Angular transducer 9-1 selects electromagnetic type angular transducer；Integrated circuit unit 13 selects 8 AVR single chip ATmega64 of atmel corp；Not only can guarantee that precision but also can reduces cost.

Above-mentioned is enlightenment according to desirable embodiment of the present utility model, by above-mentioned description, relevant staff Various change and modification can be carried out in the range of without departing from this utility model technological thought completely.This practicality Content that new technical scope is not limited in description is it is necessary to determine it according to right technical Scope.

Claims (10)

1. a kind of engine cylinder calipers it is characterised in that described measurement apparatus include the body of rod (1), the lower body of rod (2), First motor (3), the second motor (4), horizontal support shell (5), support component (6) and cylinder diameter measurement assembly (7)； The described upper body of rod (1) includes the upper boom main body (1-1) of hollow tubular structure, is arranged on the electricity of described upper boom main body (1-1) bottom Machine fixed mount (1-2) and the regulation boss (1-3) being arranged on described upper boom main body (1-1) outside；Described second motor (4) It is fixed on described motor fixing frame (1-2)；Tooth-shape structure is machined with the outer peripheral face of described upper boom main body (1-1), forms whirlpool Wheel (1-4), described turbine (1-4) is located above described regulation boss (1-3)；Described horizontal support shell (5) central part has Install described adjust boss (1-3) mounting groove (5-1), described mounting groove (5-1) with diameter greater than described regulation boss (1-3) Diameter；The upper end of described upper boom main body (1-1) is provided with level indicator (8)；It is connected with least on described horizontal support shell (5) Three groups are used for the support component (6) being fixed on described measurement apparatus on cylinder, are made by adjusting each support component (6) Described upper boom main body (1-1) level；Described measurement apparatus also include the sensor for measuring the described upper body of rod (1) anglec of rotation Assembly (9), described sensor cluster (9) include the angular transducer (9-1) being fixedly installed on described upper boom main body (1-1) and It is fixedly installed on the internal gear disc (9-2) on the downside of described horizontal support shell (5)；The measurement end of described angular transducer (9-1) is stretched Enter in described internal gear disc (9-2)；It is coaxially connected with worm screw (10), described snail on the output shaft of described first motor (3) Bar (10) is engaged with described turbine (1-4)；The described lower body of rod (2) includes lower beam main body (2-1) and the setting of hollow tubular structure In the test desk (2-2) of described lower beam main body (2-1) lower end, described test desk (2-2) is vertical with described lower beam main body (2-1), The upper end of described lower beam main body (2-1) has an elongated slot, and the bottom of described upper boom main body (1-1) is set in described lower beam main body (2-1) top, the interior in the hole of described upper boom main body (1-1) has plush copper (1-11) corresponding with described elongated slot, described lower beam Elongated slot in main body (2-1) moves up and down under the guide effect of described plush copper (1-11), make the described upper body of rod (1) with described under The body of rod (2) can axially relatively move and can not relatively rotate；Profile of tooth knot is machined with the outer peripheral face of described lower beam main body (2-1) Structure, forms tooth bar (2-3), the output shaft of described second motor (4) is coaxially connected with gear (11), described gear (11) Engage with described tooth bar (2-3)；There is in described test desk (2-2) measured hole (2- vertical with described lower beam main body (2-1) 21), the central axis of described measured hole (2-21) is intersected with the central axis of described lower beam main body (2-1)；Described cylinder diameter measurement Assembly (7) is arranged in described measured hole (2-21), and described cylinder diameter measurement assembly (7) includes：With the described engine air inside wall of cylinder The gauge head module of contact, by spring (7-1) on the engine air inside wall of cylinder for the described gauge head module pressing and with described gauge head mould The displacement transducer (7-3) that block is fixedly connected.

2. engine cylinder calipers according to claim 1 are it is characterised in that described support component (6) includes the One support bar (6-1), second support bar (6-2) and the 3rd support bar (6-3), the upper end of described second support bar (6-2) has Elongated hole (6-21), the upper end of described first support bar (6-1) is bolted with described horizontal support shell (5), and described The upper end of two support bars (6-2) passes through described elongated hole (6-21) and the lower end of described first support bar (6-1) to fix by bolt, Described 3rd support bar (6-3) is square, and one of right-angle side of described 3rd support bar (6-3) supports with described second The lower end of bar (6-2) is bolted.

3. engine cylinder calipers according to claim 2 are it is characterised in that described 3rd support bar (6-3) Rubber packing (6-4) is additionally provided with the medial surface of two right-angle sides, adjusts support bar assembly, make the 3rd support bar (6-3) Respectively horizontally and vertically, vertical right-angle side is close on the inwall of cylinder two right-angle sides, and the right-angle side of level is tight It is pressed in the upper edge of cylinder, measurement apparatus are fixed on cylinder.

4. the engine cylinder calipers according to any one of claim 1-3 are it is characterised in that described support component (6) it is four groups, support component (6) circumference uniform distribution described in four groups is fixed on described horizontal support shell (5).

5. engine cylinder calipers according to claim 1 it is characterised in that described measured hole (2-21) include from The first hole (2-211), the second hole (2-212) and the 3rd hole (2- that the centre of described test desk (2-2) sets gradually laterally 213)；Described gauge head module includes gauge head (7-4) and the push rod (7-2) being fixed on described gauge head (7-4) rear end, described push rod (7-2) there is bar portion (7-22) and pole cap (7-21), institute displacement sensors (7-3) is arranged in described first hole (2-211), Institute's displacement sensors (7-3) is fixing with described pole cap (7-21), described bar portion (7-22) pass through described second hole (2-212) with The gauge head (7-4) being arranged in described 3rd hole (2-213) is fixedly connected, and the diameter of described second hole (2-212) is less than described The diameter in the 3rd hole (2-213), the rear end of described gauge head (7-4) is fixedly connected spring (7-1), and described spring (7-1) is along described Measured hole (2-21) axially arranged, the front end of described gauge head (7-4) is pressed on the interior of cylinder by described spring (7-1) On wall.

6. engine cylinder calipers according to claim 1 and 2 are it is characterised in that described cylinder diameter measurement assembly (7) For two groups, it is symmetricly set on the both sides of described lower beam main body (2-1).

7. engine cylinder calipers according to claim 1 and 2 are it is characterised in that described cylinder diameter measurement assembly (7) For three groups, cylinder diameter measurement assembly (7) circumference uniform distribution centered on lower beam main body described in three groups.

8. engine cylinder calipers according to claim 1 are it is characterised in that described first motor (3) is solid It is scheduled on the top of described horizontal support shell (5).

9. engine cylinder calipers according to claim 1 are it is characterised in that described upper boom main body (1-1) is upper also It is fixed with display and integrated circuit package, described display and integrated circuit package include display unit (12) and integrated circuit unit (13), described integrated circuit unit (13) stores the measurement number of described angular transducer (9-1) and institute's displacement sensors (7-3) According to calculating circularity and the cylindricity of engine air cylinder bore, and described measurement data, circularity and cylindricity sent to display Unit (12) shows.

10. engine cylinder calipers according to claim 9 are it is characterised in that described angular transducer (9-1) Connecting wire is passed through from the endoporus of described upper boom main body (1-1) and is connected with described integrated circuit unit (13)；Described displacement sensing The connecting wire of device (7-3) is from top to bottom successively from described measured hole (2-21), the endoporus of lower beam main body (2-1) and upper boom main body (1-1) endoporus is passed through and is connected with described integrated circuit unit (13).