JPS5845530A - Multiple point measuring device for face pressure of piston ring - Google Patents

Abstract

PURPOSE:To decrease the deformation of measuring elements and the movement of mounting positions and to measure the face pressures of piston rings accurately by using metallic materials in lieu of insulating materials in conventional measuring devices for the measuring elements and means for mounting said elements to moving bodies. CONSTITUTION:First, bore gage discs 36 are mounted to stanchions 33, and the simples 56 of micrometer heads 53 of respective measuring devices 45 are rotated forward to bring measuring elements 50 into abutment on the discs 36. The readings of the heads 53 when the load exerted upon load cells 59 attains preset values are recorded. Piston rings P are installed on the floor surfaces of the placing parts 43 of respective ring setting bases 39, and ring gage discs 34 are disposed thereon. The bases 39 are advanced toward the stanchions 33 to reduce the rings to the same diameter as that of the discs 34, then the bases 39 are fixed. The simples 56 are rotated forward to bring the elements 50 into abutment on the rings P, and where the readings of the heads 3 attain the previously recorded values, the load exerted upon the cells 58 is measured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piston ring multi-point surface pressure measuring device that measures the distribution of surface pressure exerted by a piston ring on a cylinder.

A conventional measuring device of this kind, as shown schematically in vertical section in Fig. 1, measures the surface pressure at numerous measurement points of seven ring set devices (1) and piston rings (P) set in this device. It is composed of a large number of measuring devices Q□ that measure . The ring set device (1), as shown in FIG.
) on which a truncated conical support (3) is established via an insulator (4), and a gauge disk (5) having an outer diameter equal to the bore diameter of the cylinder into which the piston ring (P) to be measured fits. ) is loosely fitted into a ring holder (7) which has a large number of claw pieces (9) protruding upward and provided at equal intervals on the outer periphery of a circular plate (8) at the lower end, and a gauge disk (5). Fix the circular plate (8) of the ring holder to the bottom surface of the ring holder (7) with bolts (not shown).
) is attached to the conical center hole (6) of the gauge disc (5), and the multiple claw pieces (9) of the ring holder protrude upward from the outer circumferential position by fitting the conical center hole (6) of the gauge disc (5) with the gauge disc (5) attached to the top of the support column (3). gauge disc (
5) horizontally to the support column (3), and then attach the piston ring (P
) is fitted between the many claw pieces (9) of the ring holder, so that it is reduced to a diameter slightly larger than the outer diameter of the gauge disc (5) and placed horizontally above the gauge disc (5). It has a device that can be held in place. Each measuring device α1 is
As shown in FIG.
) A mobile platform Ql) with wheels is placed on top of the mobile platform (B), and an upper roller portion Q4 is placed in the supporting portion (6) having the shape of
Insert the probe 0 of the roller in which the lower roller part Q and the lower roller part Q are coaxially connected via the insulator Qe, and insert the pivot taper η protruding downward from the upper part of the support part (6) into the upper side of the probe. The pivot shaft (to) which fits into the bearing hole on the upper end surface of the lower roller part a and which protrudes upward through the insulator 01 at the lower part of the support part @ is connected to the measuring stylus Q) on the lower end surface of the lower roller part aO. A fixed base is fitted on the base plate (2) at the rear of the movable base (b) that fits into the bearing hole of the roller and is pivoted perpendicularly to the measurement @ of the roller, and moves back and forth toward the ring setting device (1). (E) is provided protrudingly, and the screw shaft is inserted into the wire hole Q made through the fixed metal member, and the tip of the screw shaft (support) is connected to the rear surface of the moving platform Qυ via the load cell (C). , on the screw shaft) in the normal direction, the moving table 0υ moves forward and the contact point (to) touches both adjacent claw pieces (9) of the ring holder (7).
, (9) Insert the gauge head into the gap between the holes, and first, the upper roller part α of the gauge head comes into contact with the ring-holding perfectly circular piston ring (ri), then the lower roller part a of the gauge head touches the gauge Disk (5
), and the piston ring (F
The device is designed to detect the force applied to the measuring element (to) that reduces l to the same bore diameter as the outer diameter of the gauge disk (5), and the ring holder ( 7) and the gauge disc (5) electrically connected to the upper roller part Q of the measuring head.
A power supply (to) and a first neon rung (2) are connected in series between the circuit board (2) and the electrically connected circuit board (2), and the piston ring is fitted between the claw pieces (9) of the ring holder. However, when the upper roller part Q4 of the probe comes into contact with the first neon lamp (2
) lights up, and when the ring holder (9) is released from the upper L roller part (J4) of the ring holder (J4), the first neon light is released. An electric circuit is provided to turn off the lamp (C), and a power supply (H ) and the second neon lamp (e) are connected in series, and the gauge disc (5)
An electric circuit is provided for detecting the contact between the contact point and the lower part (1110) of the contact point Qf9 by lighting the second neon lamp (e).

However, this conventional measuring instrument has the following drawbacks.

(1) The measuring head (2) of the roller is constructed with an insulator Q sieve interposed between the upper roller part a→ and the lower 9410-ra part Q0, so that the upper roller part α◆ and the lower roller part Q・σ)
Due to the difference in physical properties between the metal material and the insulating material with zero insulating material, it is very difficult to maintain the upper roller part Q and the lower roller part QQ coaxially with high precision. Upper roller part Q4 and gauge disc (5) that come into contact with piston ring (P)
If the axis of the lower roller part (a) that comes into contact with -1i is misaligned, the piston ring (P) will not have the same bore diameter as the outer diameter of the gauge disc (5), and the surface pressure of the piston ring will increase; Not measured accurately.

(2) Since the insulator α is interposed between the pivot shaft (to) that pivotally supports the lower end of the probe a1 and the moving table Ql, insulating materials generally have higher dimensional accuracy than metal materials; As a result, it is very difficult to maintain the lower end of the measuring element (13) in a predetermined position with high precision. Because the installation height of the screw ring (P) and the installation height of the gauge disk (5) are different, the bore diameter is not the same as the outer diameter of the screw ring (reverse gauge disk (5)), and the piston Blood pressure in ring (P) is not measured accurately.

(3) Since the contact state between the contact point (to) and the gauge disc (5) is detected by the lighting state of the first neon rung member, the contact state between the contact point (to) and the gauge disc (5) of each measuring device is detected. It takes considerable skill to adjust the pressure to a constant value using the brightness of the second neon lamp (a) of each measuring device, so make sure that the piston ring (Pl) is exactly the same as the outer diameter of the gauge disc (5). It is difficult to make the bore diameter the same.

(4) Piston ring (P) with many claw pieces (9)
The ring holder (7), which is fitted between the piston rings (P) and held by reducing the diameter to a diameter slightly larger than the bore diameter, has a fixed distance between the claws (9), so Each time the diameter changes, it is necessary to manufacture a product corresponding to that diameter, and the manufacturing cost increases because the shape is complicated.

An object of the present invention is to provide a multi-point surface pressure measuring device for piston rings that can eliminate the drawbacks of the conventional measuring devices as described above and accurately measure the surface pressure of piston rings.

Next, examples of the present invention will be described.

The multi-point surface pressure measuring device of this example shown in FIGS. 2 to 1 measures the surface pressure at many measurement points of one setting device (B) and a piston ring (P) set in this device. It consists of a large number of measuring devices). The setting device G force establishes a truncated conical support (to) on the center of a disc-shaped base (2), and a conical center hole (2) that fits into the upper end of the support.
The outer diameter of the ring gauge disk (to) that is inserted through the ring gauge is larger than the bore diameter of the cylinder into which the piston ring (P) to be measured fits, and smaller than the outer diameter of the piston ring (F) in the free state. In addition, the outer diameter of the bore gauge disk (to), which has a conical center hole (b) that fits in the center of the support column, is formed to be the same diameter as the above-mentioned bore diameter, and the base plate is A large number of guide grooves (to) are provided radially around the upper support (to), and each guide groove (to) has a −-shaped ring set stand (to).
2) is slid into each ring set base (to) that slides along each guide groove (to), and a long hole -9- along the sliding direction is passed vertically into each ring set base (to), and a long hole is inserted into each of the long holes. Insert the bolts (6), screw the tips of each bolt into the screw holes drilled in the bottom of each guide groove (to), and connect each ring set to the support respectively. Each ring set table (2) has an L-shaped step-like installation part formed at the front upper end of each ring set table (2), and a triangular cross section is formed on the wall of each installation part. It has vertically shaped claws. For each measuring device), the adjacent ring set stands (to), C
! Fix the front mounting base and the rear mounting base on the base between
A movable body (goods) in the shape of a short shaft with a non-circular cross section is slid into the holder, and a U-shaped restraint part @ Samurai formed at the front end of the movable body that moves back and forth toward the column is integrated with a metal material. The measuring hole of the roller manufactured in 2008 is vertically supported, and the sleeve of the micrometer head is fitted into the mounting hole (c) made through the protruding rear part of the rear mounting part υ. A holder with a built-in load 7 fi/- is slid into the sliding fitting hole I71 penetrated through the protruding front part of the side mount, and the micrometer head fixed to the rear mount is moved back and forth by the spindle μ-. The tip of the holder is connected to the rear end of the holder, and the front end of the holder is connected to the connecting shaft protruding from the rear end of the moving body, and the spindle lv@ of the micrometer head is connected through the load 7/I/-. Connect the moving body (goods) with the micrometer head simp, A.
When /In is forward or reversed, the moving body (therefore the probe) moves back and forth towards the column (toward) due to the forward and backward movement of the spindle /I/v3. A measuring device is installed to measure and display the load applied to @.

When using the multi-point surface pressure measuring device of this example, first, as shown in Figures 5 and 6, fit a bore gauge disc (to) in the center of the support column with its conical center hole. At each measuring device), move the micrometer head forward toward the bore gauge disk, with the simp fi/@ of the micrometer head facing forward, and move the gauge head toward the bore gauge disk. Micrometer when the surface is brought into contact with the outer circumferential surface of the pore gauge disc - and the load applied to the probe ■, which is the contact pressure between the outer circumferential surfaces, or the load applied to the load 7/L/@ reaches a preset constant value. Read and record the scale on the head. In this way, in each measuring device), after checking the position where the probe contacts the outer peripheral surface of the bore gauge disk (to), which has the same outer diameter as the bore diameter, with a constant contact pressure, Reverse the Sing/L/@ of the head to move each gauge head back from the bore gauge disc (to), and also move the bore gauge disc (towards).
(To) is extracted from the support column. Next, each ring set metal member that had been retreated was moved forward toward the support column, and as shown in Figure 7 and Figure g, the piston ring to be measured (phantom) was inserted into the support column Place it on the floor of the installation part of the ring set stand, place it at the same height as the bore gauge disk that was previously attached to the support column, and attach the ring gauge disk to the top end of the support column. Fit the conical center hole (2) and install it horizontally, and attach the ring gauge disc (b) to each ring set stand (
Place each ring set on top of the piston ring ■ which is placed horizontally on the piston ring ■, placed horizontally on the piston ring (with the piston ring (PI) placed on the floor of the installation area), and move it further toward the support column. , the claws on the installation part of each ring set stand.
are in contact with the outer circumferential surface of the piston ring (F), and further in contact with the outer circumferential surface of the ring gauge disc (incorporated), so that the outer diameter of the piston link (P), which was in a free state, is ), and then tighten the bolts θυ and @η, which are inserted through the long holes -1- of each ring set table, to fix each ring set table (to) in that position. After that, remove the ring gauge disc from the support. When the piston rings are reduced to the same diameter as the outer diameter of the ring gauge disk (b) and held horizontally on each ring set table (to), a micrometer is placed on each measuring device. Rotate the lamp/v@ of the head in the normal direction to move the probe ■ forward toward the piston ring ■,
As shown in Fig. 2 to Fig. μ, the outer circumferential surface of the probe is brought into contact with the outer circumferential surface of the piston link (P) to reduce the diameter of the piston ring (P), and the scale of the micrometer head is adjusted. When the value reaches the value recorded earlier, the rotation of the lamp μm is stopped. The piston ring (P), which had been clamped on the installation part of each ring set table, was reduced to the same diameter as the outer diameter of the bore gauge disk (to), that is, the bore diameter, and clamped horizontally using the probe of each measuring device. In this state, each measuring device measures the load applied to the load filter H, that is, the load applied to the measurement point of the piston ring (P') that the measuring probe comes into contact with. In this way, the load applied to each measuring point of the piston ring (F) measured by each measuring device) is applied to the piston ring that bears the load. By dividing by the contact area of the cylinder, you can find the distribution of surface pressure that the piston ring exerts on the cylinder.

The multi-point surface pressure measuring device of the present invention includes one setting device and a large number of measurement devices that measure surface pressures at many measurement points of a piston ring installed in this device, and the setting device includes: A support is established to removably attach a bore gauge disk formed to have the same diameter as the bore diameter of the cylinder into which the piston ring to be measured fits, and a large number of ring set stands are moved back and forth around the support towards the support. The piston ring is installed around the support using each ring set stand, and each measuring device is installed between both adjacent ring set stands by moving a movable body with a probe attached to its front end back and forth toward the support. The spindle μ of the multi-hole meter head, which is movable and fixed at the rear of the moving body, is connected to the moving body via the load set μ, and the measuring head is moved to the support by the advancement of the spindle μ of the micrometer head. A device that can make contact with the bore gauge disk attached to the ring set and a piston ring installed on the ring set stand separately, and a device that allows the load sensor to measure the force applied to the gauge head that reduces the piston ring to the same diameter as the bore gauge disk. This is a multi-point surface pressure measurement device for piston rings.

In this multi-point surface pressure measuring instrument, there is no need to use insulating materials for the measuring head and the means for attaching it to the moving object, unlike those in conventional measuring instruments. .

By reducing the deformation of the gauge head and the movement of the mounting position of the gauge head, it is possible to prevent a decrease in measurement accuracy due to such deformation and movement, and it is possible to accurately measure the surface pressure of the piston ring.

In addition, since the contact state between the contact point and the bore gauge disc is detected by the load applied to the load sep, unlike conventional measuring instruments that detect by the lighting of a lamp, no special skill is required and the piston ring can be accurately detected. It is easy to make the diameter the same as the bore gauge disc.

Furthermore, the setting device has a ring setting table that can move back and forth and can install piston rings of different diameters. There is no need to manufacture piston rings according to the diameter each time the diameter of the piston ring changes.

In addition, in the multi-point surface pressure measuring device shown in the illustration,
The height of the bore gauge disc (to) installed horizontally on the support column and the piston ring (P) installed horizontally on the ring set table.
) are the same height, and the part of the gauge head that contacts the bore gauge disc is the same as the part that contacts the piston ring, so even if the gauge head installed vertically is tilted, the piston ring cannot be moved against the bore gauge disc. can be made to have the same diameter.

[Brief explanation of the drawing]

FIG. 1 is a schematic longitudinal cross-sectional view of a conventional multi-point surface pressure measuring device.
Fig. 2 is a partial longitudinal sectional front view of a multi-point surface pressure measuring device in a dormitory embodiment of the present invention, Fig. 3 is a plan view of the same measuring device, and Fig. 3 is an enlarged view of the central part of Fig. 3. Fig.
Figures 1 and 2 are a partially longitudinal front view and a partially enlarged plan view showing other uses of the measuring instrument. 31: Setting device 33: Support 36: Bore gauge disc 39: Ring setting stand 45: Measuring device
48: Moving object 50: Measurement constant 53:
Micrometer head 55 Nispinto! 5th:
Road 7~P: Piston ring diagram 1

Claims (1)

[Claims] It consists of one setting device and a number of measurement devices that measure the surface pressure at many measurement points of the piston ring installed in this device. Establish a support to removably attach a bore gauge disk formed to have the same diameter as the l-a diameter of the cylinder to be used, and install one FuguSef unit around the support so that it can move back and forth toward the support, each ring set. The piston ring can be installed on the rotating shaft of the support using the stand, and each measuring device can be expanded, and the measuring head can be attached to the front end between both adjacent ring set stands. The spindle of the micrometer head fixed at the rear of the moving body is connected to the moving body via the word set μ, and the measuring head is attached to the support post by the advance of the spindle μ of the micrometer head. and the piston ring installed on the ring set table, and the force applied to the gauge head that reduces the piston ring to the same diameter as the bore gauge disk can be measured at a load of 7~. A multi-point surface pressure measurement device for piston rings.