Cylinder Sleeve Puller And Inserter

Abstract

A cylinder sleeve puller and inserter in which a reversible dome fitting is coupled through a quick disconnect means to a hydraulic piston rod and placed in communication through an adaptor with one end of a cylinder sleeve, the piston rod being concentrically received by the cylinder; a structural bridging plate communicating through spacer legs to the top of an engine block in which the cylinder is located for coupling to the hydraulic cylinder receiving the hydraulic piston rod for exerting a force on the reversible dome fitting and forcing the cylinder sleeve out of the cylinder and surrounding the hydraulic cylinder. When inserting a cylinder, the reversible dome fitting is reversed attached to the hydraulic piston rod and the end of a cylinder sleeve which hydraulically forces the cylinder sleeve into the cylinder.

Description

BRIEF DESCRIPTION OF THE INVENTION

The present invention relates to a cylinder sleeve puller and inserter and more particularly to a cylinder sleeve puller and inserter which is reversible for both operations.

According to the invention, a cylinder sleeve puller and inserter is provided in which a reversible dome fitting is adapted for attachment to a hydraulic piston rod within a hydraulic cylinder. The reversible fitting, in the case of pulling the cylinder sleeve, is coupled to one end of the cylinder sleeve and the hydraulic piston rod which is received concentrically within the cylinder sleeve and pulled through a hydraulic cylinder out of its cylinder surrounding the hydraulic cylinder. Upon insertion, the dome fitting is reversed and the hydraulic cylinder pushes the cylinder sleeve into the cylinder in a block. A coolant can be utilized on the sleeve for contracting the sleeve and effecting an easier insertion.

An object of the present invention is the provision of a cylinder sleeve puller and inserter which utilizes reversible parts for both operations.

Another object of the present invention is the provision of a cylinder sleeve puller and inserter which is easily adaptable to any conventional block and cylinder size.

A further object of the invention is the provision of a cylinder sleeve puller and inserter which utilizes a minimum of parts.

Yet another object of the invention is the provision of a cylinder sleeve puller and inserter which is simple to assemble and extremely convenient in use.

Other objects and many of the attendant advantages of this invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings in which like reference numerals designate like parts throughout the FIGS. thereof and wherein:

FIG. 1 is a sectional view of a motor block and sleeve puller in situ;

FIGS. 2a, 2b and 2c illustrate various hydraulic cylinder support plates;

FIG. 3 illustrates the reversible dome fitting of the present invention in spatial relationship to various adaptor fittings; and

FIG. 4 illustrates a sectional view of a motor block and sleeve puller and inserter utilized in inserting a cylindrical sleeve.

DETAILED DESCRIPTION OF THE DRAWINGS

Referring to FIG. 1, a reversible dome fitting 11 is shown connected by a quick disconnect means 12, such as a triple-land-breech-block thread fitting, to a hydraulic piston rod 13 which slidably enters a concentric end of hydraulic cylinder 14 and positively connects with an internal piston (not shown) slidably related to an internal cylindrical cavity in hydraulic cylinder 14. Piston rod 13 may be retracted into hydraulic cylinder 14 by introducing a pressurized liquid medium through retraction tubing 16 while simultaneously venting fluid through extension tubing 17 to a receptacle of lower pressure than that of the liquid medium in retraction tubing 16. The upper portion of hydraulic cylinder 14 is connected by a quick disconnect means 18 to a structural bridging plate 19 which communicates with at least two spacer legs 21a and 21b having continuous threaded sections 23a and 23b. Spacer legs 21a and 21b are adjustable in length by rotation of hexagonal end pads 24a and 24b and are locked in position by hexagonal nuts 26a and 26b. Hexagonal end pads 24a and 24b, when placed in contact with upper surface 27 of motor block casting 28, provide a means of achieving a desired spacing and parallel orientation between upper surface 27 and structural bridging plate 19. Motor block casting 28 is illustrated with bearing support webs 29 and cylinder sleeve liners 31 which is in concentric alignment with hydraulic cylinder 14.

Reversible dome fitting 11 can be removed from hydraulic piston rod 13 by decoupling of quick disconnect means 12. Sleeve adaptor fitting 32, having an external minor circumference closely approximating the internal circumference of cylinder sleeve liner 31, also having an external major circumference of cylinder sleeve liner 31, and further having an internal circumference slightly larger than the external minor circumference of reversible dome fitting 11, can be inserted into cylinder sleeve liner 31 at the lower end. Dome fitting 11 can then be recoupled to hydraulic piston rod 13 to retain sleeve adaptor fitting 32 adjacent to the lower end of cylinder sleeve liner 31.

In the specific combination described above, it is easily seen that introduction of an adequately pressurized liquid into hydraulic cylinder 14 through retraction tubing 16 will act through the hydraulic piston (not shown), hydraulic piston rod 13, reversible dome fitting 11 and sleeve adaptor fitting 32 to apply force on the lower end of cylinder sleeve lining 31 and raise it to an extracted position shown in phantom at 33.

Referring to FIGS. 2a, 2b and 2c, a series of structural bridging plates 34, 35 and 36 are illustrated, the shape of each being best suited to cooperate with a plurality of engine block surfaces, top and bottom. Each structural bridging plate displays a plurality of internally threaded apertures 22, a plurality of tapered webs 37, and a portion of quick disconnect means 18.

Referring to FIG. 3, reversible dome fitting 11 is shown below and in concentric alignment with sleeve adaptor fitting 32 as these two members were applied in the extracting action of FIG. 1. Sleeve adaptor fitting 32 is also shown in an inverted position below dome fitting 11, together with a series of sleeve adaptor fittings 38, 39 and 40 dimensioned to accommodate cylinder sleeve liners of progressively larger diameters.

Referring to FIG. 4, the motor block casting 28 is sectioned to show coolant cavities 41a and 41b and cylinder bore 42 which is dimensioned to receive cylinder sleeve lining 31. As in FIG. 1, the hydraulic piston rod 13 and hydraulic cylinder 14, with retraction tubing 16 and extend tubing 17, are located on the approximate center line of cylinder bore 42. Cylinder 14 is shown connected by a quick disconnect means 18 to a structural bridging plate 43 which communicates with two spacer legs, 44a and 44b, by means of internally threaded sections 46a and 46b.

Spacer legs 44a and 44b are adjustable in length by rotation of hexagonal end pads and may be locked by hexagonal nuts 26a and 26b to establish a desired distance and parallel orientation between structural bridging plate 43 and a lower surface 47 of motor block casting 28 with which they are in contact.

With cylinder sleeve liner 31 positioned at the upper opening of cylinder bore 42, an inverted sleeve adaptor fitting 32 can be inserted into the upper opening and an inverted dome fitting 11 can be connected by quick disconnect means 12 to hydraulic piston rod 13.

By inserting a pressurized liquid into retraction tubing 16 and venting extension tubing 17, hydraulic piston rod 13, dome fitting 11, sleeve adaptor fitting 32 may be driven downward to insert cylinder sleeve liner 31 into cylinder bore 42.

It should be understood, of course, that the foregoing disclosure relates to only a preferred embodiment of the invention and that it is intended to cover all changes and modifications of the example of the invention herein chosen for the purposes of the disclosure which do not constitute departures from the spirit and scope of the invention.

Claims

The invention claimed is:

1. In a hydraulically operated tool for inserting and removing each of a plurality of cylinder sleeves in the cylinders of an engine block, including a non-movable base for supporting a hydraulically operated ram having an extended position and a retracted position, adjustable spacer legs for locating said base in spaced relationship with one or the other side of said block, the improvement comprising:

a. a hollow dome fitting having an annular flange disposed about its periphery for engagement with one end of one of said plurality of cylinder sleeves, said flange being diametrically sized less than the external diameter of said cylinder sleeves;

b. a spacer having a greater diameter than said annular flange disposed intermediate said fitting and said engaged cylinder sleeve for inserting or removing different sized cylinder sleeves; and

c. a quick disconnect means for securing said fitting to said ram; whereby, said fitting is secured to said ram by said disconnect means while said ram is in said extended position and said fitting engages one end of one of said plurality of cylinder sleeves to draw said engaged cylinder sleeve into or out of the respective cylinder as said ram moves from said extended position to said retracted position whereafter said engaged cylinder sleeve is released by operating said disconnect means.

2. In a hydraulically operated tool for inserting and removing each of a plurality of cylinder sleeves in the cylinders of an engine block, including a non-movable base for supporting a hydraulically operated ram having an extended position and a retracted position, adjustable spacer legs for locating said base in spaced relationship with one or the other side of said block, the improvement comprising:

a. a hollow dome fitting reversibly attached to said ram and having an annular flange disposed about its periphery for engagement with one end of one of said plurality of cylinder sleeves, said flange being diametrically sized less than the external diameter of said cylinder sleeves; and

b. a quick disconnect means for securing said fitting to said ram; whereby, said fitting is secured to said ram by said disconnect means while said ram is in said extended position and said fitting engages one end of one of said plurality of cylinder sleeves to draw said engaged cylinder sleeve into or out of the respective cylinder as said ram moves from said extended position to said retracted position whereafter said engaged cylinder sleeve is released by operating said disconnect means.

3. In a hydraulically operated tool for inserting and removing each of a plurality of cylinder sleeves in the cylinders of an engine block, including a non-movable base for supporting a hydraulically operated ram having an extended position and a retracted position, adjustable spacer legs for locating said base in spaced relationship with one or the other side of said block, the improvement comprising:

a. a hollow dome fitting having an annular flange disposed about its periphery for engagement with one end of one of said plurality of cylinder sleeves, said flange being diametrically sized less than the external diameter of said cylinder sleeves, the portion of said fitting adjacent either side of said annular flange positioning and guiding said engaged cylinder sleeve; and

b. a quick disconnect means for securing said fitting to said ram; whereby, said fitting is secured to said ram by said disconnect means while said ram is in said extended position and said fitting engages one end of one of said plurality of cylinder sleeves to draw said engaged cylinder sleeve into or out of the respective cylinder as said ram moves from said extended position to said retracted position whereafter said engaged cylinder sleeve is released by operating said disconnect means.