FIELD OF INVENTION

The subject matter described herein, relates to a new system for inspection of crank case of an engine and more particularly to the inspection of cylinder block seating surface in a crankcase.

BACKGROUND OF THE INVENTION

The crank case is a part of the engine of two wheeler, which is used as a sub assembly together with crank case Left hand and Right hand to form as a gearbox, along with the sub assembly of crank shaft, drive shaft and counter shafts, ultimately transfer the motions in to the rear wheel of a motorcycle. These crank cases are being machined in Computerized numerical control machining centres, example of machining operations are milling, drilling, tapping and boring done with the help of a work holding attachment. These machined surfaces and holes are measured by using specially designed accurate and precise inspecting devices. These devices are located near by the machines to check the part before moving it to next operations.

This type of inspecting devices is custom designed to suit the component size, tolerance and specifications. This inspecting device consists of the elements of base plate, locating pin, orienting pin, rest pads. Moreover these devices are to be engineered by considering precision and accurate features. Mostly inspecting devices used for this purpose are based upon the air pressure measurement technique for which air gauges are used. Such air gauging systems are based on pressure changes. It determines the volume of air escaping from the smallest hole of the pipe it passes through. The air gauges use compressed air to convert any changes in the air flow induced by the dimensional variations of the work piece in to variations in pressure. These devices are all working to pressure measuring method. Air electronic converters are used to convert the variations in pressure in to variations in length. The inductive probes which are fitted near the cylinder block seating surface resulting the display of length measurement using electronic gauge unit.

Mentioned method of crank case cylinder block seating surface length measurement with pneumatic air gauge principle device has some disadvantages like blockage of air jets due to component burrs entering in to jets pipes, repeatability and reproducibility of cylinder block seating surface length measurement error 70% as against the requirement of 10%, change in air pressure results in variable length measurement. Due to such erratic measurement readings a component with wrong or non uniform measurements passes to the engine assembly line and hence there comes an issue in assembling other components of the engine resulting in an overall bad product. Such issues results in no consistency in the top and bottom dead centre distances and hence reproduction of same kind of engine parts become difficult. Thus there is a requirement of an inspection device which can overcome aforementioned problems of the stated methods and can effectively perform in crank case cylinder block seating surface measurement with more accuracy.

SUMMARY OF THE INVENTION

The present subject matter herein described is related to an inspecting device for crankcase of engine. This inspecting device has a new measurement technique for cylinder block seating surface height in crankcase. Said device has a base plate on which a pusher is fixed with a sliding block supporting electronic probes. Said pusher creates thrust to move sliding block forward ensuring to and fro motion of the electronic probes touching cylinder block seating surface of the crankcase. Said crankcase is fixed over the base plate and an orienting pin is facilitating proper positioning of the crankcase. A ball clamp is located in a ball clamp locater which is fixed over the base plate and is accommodated in a crankshaft slot of said crank case. This ball clamp has solid masses/ solid balls/ circular solid structures supported by a spring controlled plunger from inside of the ball clamp.

Said spring controlled plunger is producing pressure on said solid balls from inside such that said solid mass adjust the dimensional deviations of the crankshaft slot ensuring alignment of the centre of the crankshaft slot and the centre of the ball clamp. Mentioned electronic probes read cylinder block seating surface height from the centre of the ball clamp. These and other features, aspects, and advantages of the present subject matter will become better understood with reference to the following description and appended claims. This summary is provided to introduce a selection of concepts in a simplified form. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from the detailed description given herein below and the accompanying drawings which are given by way of illustration only, and thus, are not limited of the present invention and wherein:

Figure 1 is depicting the embodiments of the claimed inspection device.

Figure 2 is showing the crankcase with a focus to the cylinder block seating surface in said crankcase.

Figure 3 and Figure 4 are showing the embodiments and enablement of the claimed system for the inspection of the cylinder block seating surface.

Figure 5 and Figure 6 are depicting the essential embodiments of the system for inspection of the cylinder head seating surface in the crankcase.

DETAILED DESCRIPTION OF THE INVENTION

The embodiments disclosed below are not intended to be exhaustive or to limit the invention to the precise forms disclosed in the following detailed description. Rather, the embodiments are chosen and described for understanding and enablement purpose of the invention. The application of this invention is extended to all kind vehicles. In the present disclosure, Figure 1 illustrates embodiments of the claimed inspection device. Said device has a base plate 03 supported by base plate supports 04. Multiple rest pads 08 are located over the base plate 03 in such a way that any shaped crankcase 100 can be secured over these rest pads 08. An orienting pin 02 is arranged over the base plate 03 and ensures proper position of the crank case 100 over said base plate 03.

A ball clamp locator 01 is fixed with the base plate 03 and housing a ball clamp 01a inside it. Said ball clamp 01a gets fixed inside the crankshaft slot 100C (Figure 2) of the crankcase 100. Sliding block 06 is fixed with the base plate 03 such that it can move to and fro based upon the thrust produced by a pusher 05 fixed on its out end. Said sliding block 06 has electronic probes 07 on its inner end and said inner probes 07 moves to and fro with the sliding block 06. As shown in Figure 2, mentioned device measures the height CH of seating surface 100B of the cylinder block over the crankcase 100 from the centre of the crankshaft slot 100C. Referring to Figure 3 to Figure 6, enablement of said device is explained. As explained earlier said device has a ball clamp locator 01 and orienting pin 02 mounted over the base plate 03 ensuring positioning of the crankcase 100 in the required orientation to arrest in all the possible degrees of freedom with respect to the cylinder block seating surface 100 B.

A pneumatically controlled pusher 05 of approximate diameter 16 mm cylinder is connected with sliding block 06 mounted on base plate 03 along with electronic probes 07. When sliding block 06 moves forward with the thrust produced by pusher 05 the electronic probe touches the cylinder block seating surface 100B for required height CH measurement. This height is measured from the centre of the crankshaft slot 100C this accuracy in centre measurement is essential. Mentioned ball clamp 01a adjusts the dimensional deviations of pre machined crankshaft slot 100C diameter due to pressure on solid circular structures or balls 09 by spring loaded plunger (not visible in drawings) from inner side of the ball clamp 01a. These adjustments leads to the alignment of the centre of the ball clamp 01a with the centre of the crankshaft slot 100C.

For the best output and enablement of the claimed invention ball clamp locator 01 is provided with a set of multiples of standards such as 8.5 mm spherical balls 09 apart protruded externally to form the required diameter as shown in Figure 5 and Figure 6. Radial movement of the ball 09 remains around 0.5 mm and ensures the variation acceptance on locating diameter up to 1 mm. The spring loaded taper plunger linked with ball clamp 01a is to retain the ball 09 positions rigidly with respect to crankcase 100 crankshaft slot 100C diameter thereby accurate and precise measurement of dimension can be ensured Mentioned pusher 05 moves forward thereby the electronic probes 07 touches the cylinder block seating surface 100B. This probe 07 is connected to the electronic display unit and hence the measured component height gets displayed for further processing. The above explained preferred embodiments are exemplary of the invention of the present application, which is described solely by the claims appended below.

DRAWING NUMBER CLASSIFICATION

100-Crank Case

100C - Crankshaft Slot In Crank Case 100B - Cylinder Block Seating Surface CH - Cylinder Block Seating Surface Height

1 - Ball Clamp Locator 01a-Ball Clamp

2 - Orienting Pin

3 - Base Plate

4 - Base Plate Support

5 - Sliding Block

6 - Pusher

7 - Electronic Probe

8 - Rest Pad

9 - Solid Ball Mass 10-Side Clamp

WHAT IS CLIAMED IS

1) An inspecting device for a crankcase of an engine characterized by its cylinder block seating surface height measurement technique, comprising: a base plate supported by atleast one base plate supporter and configured to accommodate a pusher fixed with a sliding block supporting atleast one electronic probe such that pusher creates a thrust to move sliding block forward and facilitates to and fro motion of the electronic probe such that said electronic probe touches cylinder block seating surface of the crankcase which is secured over atleast one rest pad fixed with the base plate such that an orienting pin is facilitating positioning of the crankcase and a ball clamp located in a ball clamp locater, fixed with the base plate, is accommodated in a crankshaft slot of said crank case; wherein the ball clamp comprises atleast one solid mass supported by a spring controlled plunger producing pressure on said solid mass from inside such that said solid mass adjust the dimensional deviations of the crankshaft slot ensuring alignment of the centre of the crankshaft slot and the centre of the ball clamp and mentioned electronic probe reads cylinder block seating surface height.

2) The inspecting device, as claimed in claim 1, wherein the solid mass defines circular solid structures.

3) The inspecting device, as claimed in claim 2, wherein the circular solid structures are around the periphery of the ball clamp top such that said solid structures has a degree of freedom of to and fro movement.