KR20090130452A - Device for measuring and grinding camring inside diameter of power steering oil pump - Google Patents

Abstract

PURPOSE: A device for measuring and grinding a cam ring inside diameter of a power steering oil pump is provided, which makes recycling efficiency is maximized by making ejection quantity of reuse cam ring uniform. CONSTITUTION: A device for measuring and grinding a cam ring inside diameter of a power steering oil pump comprises a main body member(16), a process chamber(18), top and bottom support stands(28,26), a cam ring settling portion, a cam ring inner diameter measuring unit, a cam ring inside diameter grinding unit, and a rotating unit. The main body member includes a control panel(20) built in the main body member, an LCD display(22), and an operation button(24). The rotating unit is installed to the top and down support stand. The rotating unit rotates the cam ring inner diameter measuring unit and cam ring inside diameter grinding unit.

Description

Device for measuring and grinding camring inside diameter of power steering oil pump}

The present invention relates to a cam ring inner diameter measurement and grinding device of a power steering oil pump, and more particularly, to secure the performance of a remanufacturing power steering oil pump, precisely measuring the inner diameter of a cam ring, and to enable grinding if necessary. A cam ring inner diameter measurement and a grinding device of an oil pump.

As is well known, the power steering oil pump is a key part of the vehicle steering system, which serves to send steering oil to the gearbox, and its basic configuration includes rotors, bearings, cam rings, vanes, pulleys, and other oil seals. And bushes are further included.

The power steering oil pump receives power through a belt connected to the engine of the vehicle. In general, a vane pump (see FIG. 6) is most widely used.

The vane pump is widely used in various fields because the pulsation of the discharge pressure is small, the discharge amount is reduced, the compatibility is good, the maintenance is easy, and the noise is low.

When the power steering oil pump is broken, the hydraulic pressure is not properly delivered to the gearbox, which causes a lot of difficulties in handling the vehicle. In this case, the oil pump must be replaced with a new one. In addition, remanufactured products are widely used. Accordingly, domestic and overseas remanufacture markets are largely formed, and distribution of remanufactured products is also active.

Usually, the main type of failure of the power steering oil pump is due to abnormal earth output due to internal component wear, in particular vanes, cam rings and the like.

7 and 8, the inner diameter of the cam ring 10 has an elliptical irregular shape, not a circle, for natural suction and discharge due to the centrifugal force of the vane.

That is, referring to FIGS. 6 and 9, in a state in which the inner diameter of the cam ring 10 and the vanes 14 mounted on the rotor 12 are arranged to face each other, the vanes between the rotors 12 ( 14) this causes friction with the inner diameter of the cam ring 10 under centrifugal force due to the rotation of the rotor 12. When the inner diameter of the cam ring 10 goes from a narrow place to a wide place, suction occurs and vice versa. will be.

At this time, the wear occurs in the vanes rather than the cam rings, and the vanes are cheaper, so there is no big burden even if they are replaced with new ones.However, the cam rings are expensive and do not have the proper measuring method. There are many, but it is not desirable in view of the fact that even a very small discharge amount change can be a problem for the steering system.

Therefore, in order to secure the performance of the remanufacturing oil pump, accurate measurement and processing of the cam ring is required.

However, in the related art, the waste product is reused as it is without measurement and additional processing for the cam ring, which causes a change in the hydraulic discharge amount even by the slight wear of the cam ring inner diameter, which is likely to cause a problem in the long term affecting the entire steering system.

In fact, since the discharge amount differs by more than 1 cc for each difference of about 0.6 mm in the long diameter of the cam ring, the oil pump is required to precisely control the discharge amount, and the solution must be pre-determined for successful remanufacturing.

When the cam ring inner diameter is worn out, in order to restore it to the original state, overlay welding and the like on the wear part may be considered, but in reality, it is virtually impossible to make fine and uniform welding in μm, and thus it is already worn. It is more realistic to camber the cam ring to a larger discharge amount.

For example, assuming that the cam ring has a long diameter of 42.762 mm and the cam ring is worn out to 43 mm, it is difficult to recover to 42.762 mm again.

However, if the long diameter of the cam ring is maintained at 43mm, it is impossible to precisely control the discharge amount since the discharge amount becomes any value between 7.2 and 8.5, and therefore it is realistic to set the long diameter to 43.600 through additional grinding, which can realize the precision in μm. .

Therefore, first, a dedicated device for accurately measuring the inner diameter of the cam ring and grinding it is necessary. Since the inner diameter of the cam ring is in the unit of μm, the measuring instrument and the grinding machine also need this precision.

The present invention has been made in view of the above point, the function of accurately measuring the wear of the inner diameter of the cam ring and, if necessary, the function of grinding the inner diameter of the cam ring can be put into one device to maximize the work efficiency In particular, when the inner diameter of the cam ring is abrasion, the discharge amount is unified through additional grinding, thereby providing a cam ring inner diameter measurement and grinding device of the power steering oil pump that can maximize the reuse efficiency by unifying the discharge amount of the reuse cam ring into one. The purpose is.

The present invention for achieving the above object is a control panel is embedded, the front surface of the main body and the LCD provided with a control button; A working chamber having a predetermined volume mounted on an upper surface of the main body so as to prevent foreign matters from splashing out; A lower support vertically extending from the upper surface of the main body to the interior of the working chamber; An upper support mounted on an upper surface of the working chamber; A cam ring seating portion mounted to the lower end of the lower supporter; Cam ring inner diameter measuring means for measuring the inner diameter of the cam ring seated on the cam ring seat; Cam ring inner diameter grinding means for grinding the inner diameter of the cam ring seated on the cam ring seat; Rotation driving means mounted to the upper support and the lower support to rotate the cam ring inner diameter measuring means and the cam ring inner diameter grinding means; It provides a cam ring inner diameter measurement and grinding device of the power steering oil pump, characterized in that configured to include.

The cam ring seating portion: a third connecting bar which is integrally mounted horizontally to the lower end of the lower support; A second motor mounted therein at an end of the third connecting bar; A pedestal mounted on an end of the third connection bar, connected to the shaft of the second motor, rotatably mounted to mount the cam ring; Characterized in that consisting of.

Rotation driving means for rotating the cam ring inner diameter measuring means and the cam ring inner diameter grinding means: a first motor mounted inside the upper support; A rotating body wrapped and positioned on a lower end of the upper support and an upper circumferential surface of the lower support, connected to the first motor shaft and rotatably positioned; Characterized in that consisting of.

The cam ring inner diameter measuring means includes: a first connecting bar integrally formed on one side of the outer diameter surface of the rotating body and vertically bent downward; A first cylinder mounted to an end of the first connection bar to lift and lower the first piston; An air or electron micrometer mounted at a lower end of the first piston of the first cylinder and measuring an inner diameter (longer diameter or shorter diameter) of the cam ring seated on the pedestal; Characterized in that consisting of.

The cam ring inner diameter grinding means includes: a second connecting bar integrally formed on the other side of the outer diameter surface of the rotating body and vertically bent downward; A second cylinder mounted at an end of the second connecting bar to lift and lower the second piston; A grinding machine mounted to the lower end of the second piston of the second cylinder and grinding the inner diameter of the cam ring seated on the pedestal; Characterized in that consisting of.

Through the above problem solving means, the present invention can provide the following effects.

The function of precisely measuring the cam ring inner diameter of the power steering oil pump and the grinding function of μm can be performed at the same time, thus maximizing the work efficiency by making the inner diameter measurement and grinding of the cam ring for reuse more convenient and accurate. You can.

In addition, when the inner diameter of the cam ring has wear, by uniformly discharging the discharge amount through additional grinding, it is possible to maximize the reuse efficiency by unifying the discharge amount of the reuse cam ring into one.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As described above, the inner diameter of the cam ring, which is a main component of the power steering oil pump, has an elliptical irregular shape having a long diameter and a short diameter, and a rotor is located at the inner diameter of the cam ring, and a plurality of vanes ( About 10) are mounted to face the inner diameter of the cam ring.

The vane mounted on the rotor is subjected to centrifugal force according to the rotation of the rotor to cause friction with the cam ring inner diameter.

The present invention is to provide a dedicated device that can accurately measure the wear degree of the inner diameter of the cam ring to determine whether additional grinding, and if necessary, to reuse the cam ring by grinding.

That is, the present invention precisely measures the inner diameter of the cam ring of the power steering oil pump and grinds if necessary, but requires very precise functions because both measurement and grinding should be performed in a micrometer unit. The purpose is to provide an internal diameter measuring and grinding device for the cam steering of the power steering oil pump.

To this end, each of the components of the device of the present invention will be described.

1 is a front view showing a cam ring inner diameter measurement and grinding apparatus of a power steering oil pump according to the present invention, FIG. 2 is a left side view, and FIG. 3 is a right side view.

First, the box-type main body 16 is disposed at the lower end, and a working volume 18 of a predetermined volume capable of preventing foreign matter from splashing out is disposed on the upper surface of the main body 16.

The inside of the main body 16 has a control panel 20, the front of the LCD window 22 and the operation button 24 is provided, the working chamber 18 for internal observation It is made of transparent material.

In addition, the upper surface of the main body portion 16, the lower support 26 in the form of a circular bar is erected vertically and integrally mounted, the lower support 26 is in a state arranged inside the working chamber 18. .

In addition, an upper support 28 is integrally formed on the upper surface of the working chamber 18, and the first motor 30 is fixedly mounted inside the upper support 28.

The lower end of the upper support 28 and the upper end of the lower support 26 are disposed facing each other in a state spaced apart from each other, the circumferential surface of the upper support 28 is wrapped in a rotating body (32).

In this case, the rotating plate 34 is integrally formed on the inner diameter surface of the rotating body 32, and the shaft of the first motor 30 is connected to the center of the rotating plate 34.

On the other hand, in the outer diameter surface of the rotating body 32, one side of the first connection bar 36 vertically bent downward is formed integrally, the end of the first connection bar 36 by using hydraulic or pneumatic The first cylinder 40 for raising and lowering the first piston 38 is mounted, and the inner diameter (longer diameter or shorter diameter) of the cam ring 10 is measured at the lower end of the first piston 38 of the first cylinder 40. Air or electron micrometer 42 is fixedly mounted.

In this case, since the micrometer for measuring the inner diameter of the cam ring 10 cannot be measured in a micrometer unit in the case of a mechanical micrometer, in the present invention, it is preferable to use an air or an electronic micrometer, and whether the air or the electron micrometer is two, Any micrometer can be used for precise measurement, so whatever you use, the air micrometer is relatively inexpensive, so considering the price, it is more preferable to use an air micrometer.

On the other side of the outer diameter surface of the rotating body 32, the second connecting bar 44 vertically bent downwardly is integrally formed, and the second connecting bar 44 has a second end by using hydraulic pressure or pneumatic pressure. A second cylinder 48 for raising and lowering the piston 46 is mounted, and at the lower end of the second piston 46 of the second cylinder 48, a grinding machine 50 for grinding the inner diameter of the cam ring 10 is provided. It is fixedly mounted.

At this time, the grinding machine 50 is equipped with a grinding wheel that can be moved up and down and left and right, and of course, additionally equipped with an electronic device in the grinding machine to accurately recognize the relative position of the grinding machine and the cam ring to enable fine grinding work. Although there are no special restrictions on the selection of grinding wheel materials for grinding machines, CBN (Cubic Boron Nitride), or cubic boron nitride, can be used for general grinding processes, and CBN does not oxidize even at high temperatures above 1300 ° C. It is most preferable to be used as grinding wheel because it is hard to 9.75.

On the other hand, a third connecting bar 52 is horizontally integrally mounted on the lower end of the lower support 26, and a second motor 54 is mounted therein at the end of the third connecting bar 52. In addition, the end of the third connecting bar 52 is mounted to the base 56, the cam ring 10 is seated, is connected to the shaft of the second motor 54 is rotatably mounted.

In the configuration of the present invention, the first and second motors 30 and 54, the first and second cylinders 40 and 48, the air or electron micrometer 42, and the grinding machine 50 are the main body 16. The operation is controlled by the operation button provided in the) and the control signal of the control panel 20 accordingly.

Here, the operation state of the cam ring inner diameter measurement and grinding device of the power steering oil pump of the present invention having the configuration as described above is as follows.

4 is a front view and a right side view showing a state of measuring the cam ring inner diameter as an operating state of the cam ring inner diameter measurement and grinding device of the power steering oil pump according to the present invention, and FIG. 5 is a power steering oil according to the present invention. It is a front view and a right side view which show a mode of grinding a cam ring inner diameter as an operation state of the cam ring inner diameter measurement of a pump, and a grinding device.

As shown in FIG. 4, in a state where the cam ring 10 is seated on the upper surface of the pedestal 56, the first motor driving unit for measuring the inner diameter of the cam ring among the operation buttons 24 of the main body part 16. When the button is pressed, the first motor 30 is driven and the rotating body 32 rotates, and the first connecting bar 36 connected to the rotating body 32 and the first cylinder at the lower end thereof ( When 40 is coincident with the upper portion of the pedestal 56, the driving of the first motor 30 is released to stop the rotating body 32.

Subsequently, when the operation button for driving the first cylinder 40 is pressed, the first piston 38 of the first cylinder 40 is lowered and at the same time, the air or electronic microcomputer is mounted at the lower end of the first piston 38. The meter 42 is located at the inner diameter of the cam ring.

Thus, when the measurement operation of the air or electron micrometer 42 is finished, the air or electron micrometer 42 is raised and lowered due to the reverse driving of the first cylinder 40.

Therefore, the long or short diameter value of the cam ring measured by the air or electron micrometer 42 is transmitted to the control panel 20 of the main body 16, and the control panel 20 is in front of the main body 16. The measurement value is displayed on the LCD window 22.

Thus, the operator sees the measured value for the inner diameter of the cam ring, the cam ring without abrasion failure is to be put into the remanufacturing process without additional grinding.

If there is wear in the inner diameter of the cam ring, the amount of discharge is uniformly adjusted through additional grinding.

Accordingly, as shown in FIG. 5, when the corresponding operation button of the main body 16 is pressed for grinding of the cam ring, the first motor 30 is driven to rotate and at the same time, the rotor 32 rotates. When the second connecting bar 44 connected to the rotating body 32 and the second cylinder 48 at the bottom thereof coincide with the upper portion of the pedestal 56, the driving of the first motor 30 is released. To stop the rotating body 32.

Subsequently, when the operation button for driving the second cylinder 48 is pressed, the second piston 46 of the second cylinder 48 is lowered and the grinding machine 50 mounted at the lower end of the second piston 46. Is located at the inner diameter of the cam ring.

Accordingly, when the grinding machine driving button of the main body 16 is pressed, the grinding machine 50 grinds the inner diameter of the cam ring to a desired level, and the grinding numerical signal is directed to the control panel 20 of the main body 16. The control panel 20 displays the grinding value on the LCD window 22 in front of the main body 16.

On the other hand, the grinding machine is lowered to grind the required portion of the cam ring, but it is not necessary to grind both the long and short diameters of the cam ring, and it is preferable to perform partial grinding for each required point.

1 is a front view showing the cam ring inner diameter measurement and grinding device of the power steering oil pump according to the present invention,

Figure 2 is a left side view showing the cam ring inner diameter measurement and grinding device of the power steering oil pump according to the present invention,

3 is a right side view showing a cam ring inner diameter measurement and grinding device of a power steering oil pump according to the present invention;

4 is a front view and a right side view showing a state of measuring the cam ring inner diameter as an operating state of the cam ring inner diameter measurement and grinding device of the power steering oil pump according to the present invention;

5 is a front view and a right side view showing a state of grinding the cam ring inner diameter as an operating state of the cam ring inner diameter measurement and grinding device of the power steering oil pump according to the present invention;

6 is a schematic view showing a vane pump mainly applied to a power steering oil pump;

7 and 8 is a schematic diagram illustrating the camring structure of the power steering oil pump;

9 is a schematic view showing a coupling state between a cam ring, a rotor, and a vane of a power steering oil pump.

<Explanation of symbols for the main parts of the drawings>

10: cam ring 12: rotor

14: vane 16: the main body

18: working chamber 20: control panel

22: LCD window 24: Operation button

26: lower support 28: upper support

30: first motor 32: rotating body

34: rotating plate 36: first connecting bar

38: first piston 40: first cylinder

42: air or electronic micrometer 44: second connecting bar

46: second piston 48: second cylinder

50: grinding machine 52: third connecting bar

54: second motor 56: pedestal

Claims (5)

A control panel is built-in, and a front surface of which is provided with an LCD window and operation buttons; A working chamber having a predetermined volume mounted on an upper surface of the main body so as to prevent foreign matters from splashing out; A lower support vertically extending from the upper surface of the main body to the interior of the working chamber; An upper support mounted on an upper surface of the working chamber; A cam ring seating portion mounted to the lower end of the lower supporter; Cam ring inner diameter measuring means for measuring the inner diameter of the cam ring seated on the cam ring seating portion; Cam ring inner diameter grinding means for grinding the inner diameter of the cam ring seated on the cam ring seat; Rotation driving means mounted to the upper support and the lower support to rotate the cam ring inner diameter measuring means and the cam ring inner diameter grinding means; Cam ring inner diameter measurement and grinding device of the power steering oil pump, characterized in that configured to include. The method according to claim 1, wherein the cam ring seating portion: A third connecting bar integrally mounted horizontally on a lower end of the lower supporter; A second motor mounted therein at an end of the third connecting bar; A pedestal mounted on an end of the third connection bar, connected to the shaft of the second motor, rotatably mounted to mount the cam ring; Cam ring inner diameter measurement and grinding device of the power steering oil pump, characterized in that consisting of. The method according to claim 1, Rotation drive means for rotating the cam ring inner diameter measuring means and the cam ring inner diameter grinding means: A first motor mounted inside the upper support; A rotating body wrapped and positioned on a lower end of the upper support and an upper circumferential surface of the lower support, connected to the first motor shaft and rotatably positioned; Cam ring inner diameter measurement and grinding device of the power steering oil pump, characterized in that consisting of. The method according to claim 1 or 3, The cam ring inner diameter measuring means is: A first connection bar integrally formed at one side of the outer surface of the rotating body and vertically bent downward; A first cylinder mounted to an end of the first connection bar to lift and lower the first piston; An air or electron micrometer mounted at a lower end of the first piston of the first cylinder and measuring an inner diameter (longer diameter or shorter diameter) of the cam ring seated on the pedestal; Cam ring inner diameter measurement and grinding device of the power steering oil pump, characterized in that consisting of. The method according to claim 1 or 3, The cam ring inner diameter grinding means is: A second connecting bar integrally formed at the other side of the outer surface of the rotating body and vertically bent downward; A second cylinder mounted at an end of the second connecting bar to lift and lower the second piston; A grinding machine mounted to the lower end of the second piston of the second cylinder and grinding the inner diameter of the cam ring seated on the pedestal; Cam ring inner diameter measurement and grinding device of the power steering oil pump, characterized in that consisting of.

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