JPH0626803Y2 - Ring gear measuring jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a measuring jig for an umbrella-shaped ring gear used for a differential gear of an automobile, and more specifically, a tapered face surface of a ring gear material and The present invention relates to a ring gear measuring jig for measuring the dimensions of each part of the ring gear with reference to the intersection of the tapered face surface and the adjacent tapered inner peripheral surface.

[Prior Art and its Problems] Conventionally, an umbrella-shaped ring gear whose cross-sectional view is shown in FIG. 5 is used for a differential gear mechanism of an automobile.

Especially, not limited to such a ring gear, a gear is generally formed by cutting or forging a gear material before forming its teeth and then cutting or forging the teeth.

The ring gear is also processed and formed in the same process, but the ring gear must have a high shape accuracy because of its function. Therefore, the gear before the gear cutting is performed during the processing process. The shape and dimensions (diameter "D" and axial thickness "H1" and "H2") of the material may be once measured and inspected.

At the time of such inspection, there is no problem as long as a portion serving as a position reference for measurement actually exists in the shape, but for example, the fifth
In the case of the ring gear as shown in the drawing, the intersection point position "X" between the tapered face surface 10A to be the reference as shown in the drawing and the tapered inner peripheral surface 10B adjacent to the tapered face surface 10A is chamfered. Therefore, it is impossible to measure from the intersection "X" which is the reference point as it is.

Therefore, a measurement gauge is formed that is in contact with both the tapered face surface 10A and the tapered inner peripheral surface 10B adjacent to the tapered face surface 10A at the same time, and that each portion is formed with reference dimensions with this contact portion as a position reference. The test was conducted by bringing this measuring gauge into contact with the ring gear material to be tested.

However, the tapered face surface 10 indicated by α and β in the figure
The angle of A and the angle of the tapered inner peripheral surface 10B differ depending on the type of the ring gear, and even if the angle is the same, they cannot be shared if the diameters are different. Therefore, all the manufactured ring gears have their own exclusive use. It was necessary to prepare a measuring gauge. For this reason, a large amount of cost is required to manufacture the measuring gauge, a wide space is required for storing the measuring gauge, and the management is also troublesome.

As a versatile measuring device for measuring the angle of the tapered face surface 10A described above, a ring gear bevel angle inspecting device disclosed in Japanese Utility Model Application Laid-Open No. 62-25804 previously filed by the present applicant. is there.

[Object of the Invention] In view of the above situation, the present invention can measure the angle of the tapered face surface and the angle of the tapered inner peripheral surface, or can be applied to a plurality of types of ring gears having different diameters. The purpose of the present invention is to provide a ring gear measuring jig having general versatility.

[Structure of the Invention] Therefore, the ring gear measuring jig according to the present invention is provided with a face surface contact member that contacts the tapered face surface of the ring gear material along the taper and a taper shape adjacent to the tapered face surface. An inner peripheral surface abutting member that abuts the inner peripheral surface along its taper is arranged so as to be relatively rotatable, and at least one outer peripheral surface of the abutting member is formed in an arc shape around the relative rotational center point. Two sets of the copying jigs configured as described above are arranged so that they can move relative to each other in a direction to be brought into contact with each other, and a measuring means for measuring the relative position of the two sets of the copying jigs and an abutting member of the two sets of the copying jigs. And a measuring means for measuring the axial thickness of the ring gear material on which the copying jig is copied and mounted from the contact surface.

Then, by relatively rotating the face surface contact member and the inner peripheral surface contact member, and by relatively moving the copying jig,
The face contacting member is brought into contact with the tapered face surface, the inner peripheral contacting member is brought into contact with the tapered inner peripheral surface, respectively, and the relative position of the two sets of copying jigs is measured by the measuring means. The diameter of the intersection of the face surface and the tapered inner peripheral surface is measured, and the axial thickness of the ring gear material is measured from the intersection by the axial thickness measuring means.

With this configuration, it is possible to accommodate a plurality of types of ring gears in which the angle of the tapered face surface and the angle of the tapered inner peripheral surface are different or the diameters are different.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of an embodiment of a ring gear measuring jig according to the present invention, and FIG. 2 is a plan view thereof.

The illustrated ring gear measuring jig 1 forms a frame 2 by separating two side plates 2A and 2A for a predetermined distance and connecting and fixing at both ends thereof, and as a copying jig between the side plates 2A and 2A of the frame 2. 2 sets of copying mechanism 3 (movable side copying mechanism 3L and fixed side copying mechanism 3R) are installed.

One fixed copying mechanism 3R which is one copying mechanism is fixed between the side plates 2A and 2A at one end of the frame 2, and the other movable copying mechanism 3L is arranged between the side plates 2A and 2A along the longitudinal direction of the frame 2. It can be moved by a predetermined amount in the direction in which it comes in contact with and separates from the fixed side copying mechanism 3.

The movable-side copying mechanism 3L and the fixed-side copying mechanism 3R have the same configuration except that the movable-side copying mechanism 3L has a sliding function described later, and the installation direction (direction) of the frame 2 is opposite. Since it is installed, the copying mechanism 3 will be described below unless otherwise required.

The copying mechanism 3 includes two discs 4 (a face side disc 41 and an inner peripheral side disc 41) in a substantially rectangular parallelepiped rotating frame 31 having a width that can be fitted between the side plates 2A and 2A of the frame 2. 42) is rotatably fitted inside and is prevented from falling off by the lid 31A.

The rotary frame 31 is formed with a circular recess having a diameter larger than the thickness (height) of the rotary frame 31, and the outer circumference of the disc 4 can be slidably rotated on the inner circumference of the circular recess. It is designed to fit in. The two discs 4 (the face-side disc 41 and the inner peripheral-side disc 42) are fitted in the circular recesses in a superposed state, and are independently slidably rotatable. That is, the disk 4 is the rotating frame 3
1 is rotatably mounted around the center thereof.

Further, the disc 4 projects upward and downward by a predetermined amount from the rotary frame 31, and the downward projecting portion is cut out at a predetermined angle from the center of the disc 4. The notched ends on both sides of each disc 4 are staggered from each other, and the two discs, that is, the face-side disc 41 and the inner-peripheral-side disc 42 are superposed on each other. An open angle “θ” is formed by the notched end surface 41A of the side disk 41 and the notched end surface 42A of the inner circumference side disk 42.

Further, the notched end portion of the inner peripheral side disc 42 on the notched end face 42A side projects into the region of the face side disc 41, and between the projecting portion 42B and the end face 41B of the face side disc 41 opposed to this. The spring 5 is inserted, and the spring 5 causes the restoring force to reduce the opening angle “θ” formed by the notched end surfaces 41A and 42A of the discs 41 and 42.
It acts to rotate 2 relatively. In the natural state, the opening angle “θ” is configured to be sufficiently smaller than the angle (α + β) formed by the face surface 10A and the inner peripheral surface 10B of the ring gear 10 to be measured, which will be described later.

The fixed-side copying mechanism 3R, which is one of the copying mechanisms 3 configured as described above, is provided between the side plates 2A and 2A at one end of the frame 2 as shown in FIG. 3 which is a sectional view taken along the line III-III in FIG. It is fixedly arranged by 21. The movable side copying mechanism 3L, which is the other copying mechanism 3, has a guide formed to protrude outward along the upper surface of the rotating frame 31, as shown in FIG. 4 which is a sectional view taken along line IV-IV in FIG. By fitting the portion 31B into the guide groove 2B formed inside the side plate 2A along the longitudinal direction thereof, the portion 31B can be slidably moved along the guide groove 2B (that is, along the longitudinal direction of the frame 2). is set up. This is the above-described sliding function, which is a point different from the fixed-side copying mechanism 3R.

A frame-shaped sub-frame 22 is provided on a side surface of the movable-side copying mechanism 3L that projects downward from a sliding fitting portion with the frame 2.
Are fixed in parallel with the frame 2, and the inner surface of the sub-frame 22 is slidably moved with the side surface of the fixed-side copying mechanism 3R. Further, pins 23 are provided from the sub-frame 22 so as to penetrate the copying mechanism 3. The through holes of the discs 41 and 42 through which the pin 23 penetrates are pin 2
The diameter is larger than the diameter of 3 by a predetermined amount, and the discs 41 and 42 are rotatable within this margin.
That is, the amount of rotation of the discs 41 and 42 with respect to the rotating frame 31 is regulated by the pin 23, and the amount of relative rotation of the discs 41 and 42, that is, the range of the opening angle “θ” is regulated. There is something.

At the end of the frame 2 on the side where the movable-side copying mechanism 3L is installed, its contactor is brought into contact with the end surface on the moving direction side of the movable-side copying mechanism 3L to measure the relative position of the copying jig. A dial gauge 5 as a means is provided, and the dial gauge 5 can measure the amount of movement of the movable-side copying mechanism 3L.

In addition, the measurement reference plate 6 is provided above the two copying mechanisms 3L and 3R.
1, the bracket bars 62 and 63 and the two sets of dial gauges 7 and 8 constitute an axial thickness measuring unit 6 which is a measuring means for measuring the axial thickness of the ring gear material.

In the axial thickness measuring unit 6, the measurement reference plate 61 is movable by a predetermined amount in the vertical direction on the upper surfaces of both the copying mechanisms 3L and 3R (the movable side copying mechanism 3L side is also movable in the moving direction). ) Is loosely attached, and the measurement reference plate 61
Is mounted on the end surface of the disc 4 protruding upward from the upper surfaces of the copying mechanisms 3L and 3R. As described above, the circular plate 4 rotates about its center of rotation, so that even if the circular plate 4 rotates, the vertical position of the measurement reference plate 61 placed on the end face thereof. Is always at a predetermined distance (radius of the disc 4) from the center of rotation of the disc 4 and does not change.

The bracket bar 62 is provided at a predetermined position on the upper surface of the measurement reference plate 61.
63 is protrudingly fixed to both sides, and dial gauges 7 and 8 are vertically penetrated and attached to the bracket bars 62 and 63, respectively. The dial gauges 7 and 8 are provided with their contacts facing downward so that the distance from the measurement reference plate 61 to a predetermined position below can be measured.

The contact of the dial gauge 7 is the ring gear 10 to be measured.
On the inner wall 10C of the boss portion, the contact of the dial gauge 8 is set so as to contact the surface plate surface 9A on which the measured ring gear 10 is placed (the same as the outer end surface 10D of the measured ring gear 10). .

Thus, according to the ring gear measuring jig 1 configured as described above, the measuring operation can be performed as follows.

With respect to the ring gear 10 to be measured placed at a predetermined position on the upper surface 9A of the surface plate 9 with the face surface 10A facing upward, a fixed side is provided at an intersection "X" between the tapered face surface 10A and the tapered inner peripheral surface 10B. The ring gear measuring jig 1 is press-fitted from above so that the open angle “θ” portions of the copying mechanism 3R and the movable side copying mechanism 3L are matched.

As a result, the disk 4 (face-side disk 4 of both copying mechanisms 3
1 and the inner peripheral surface side disk 42) rotate relative to the rotating frame 31 and relatively rotate, and the cutout end surface 4 of the face side disk 41
1A is a tapered face surface 10 of the measured ring gear 10.
The notched end surface 41A of the face-side disc 41 abuts on the taper inner peripheral surface 10B. At this time, if there is a difference between the distance between the two copying mechanisms 3 and the diameter of the ring gear 10 to be measured, the movable side copying mechanism 3L is moved in the direction in which the movable side copying mechanism 3 moves toward and away from the fixed side copying mechanism 3. It In this way, by rotating both the disks 41 and 42 of the copying mechanism 3 and moving the movable side copying mechanism 3L, the face surface 10A and the inner peripheral surface 10B can follow the respective surfaces regardless of the angle. It is something like this.

In this state, that is, the notched end surface 41A of the face-side disc 41 is on the tapered face surface 10A of the measured ring gear 10.
When the notched end surface 41A of the face-side disc 41 is completely along the tapered inner peripheral surface 10B, respectively, the center of rotation of the disc 4 is the face surface 10A as the dimension reference point of the measured ring gear 10. And the position of the intersection "X" between the inner peripheral surface 10B and the inner peripheral surface 10B.

Therefore, in this state, the distance between the parts at the predetermined positions from the center of rotation of the disk 4 of both copying mechanisms 3 is the same as the diameter of the intersection "X", and if this is measured, the distance of the intersection "X" Diameter "D"
Is something that can be measured. In addition, both copying mechanism 3
The measurement reference plate 61 placed on the end face of the circular plate 4 of
As described above, since there is a certain distance from the intersection "X", the distance from the intersection "X" at a predetermined axial position of the ring gear 10 to be measured is determined by the dial gauges 7 and 8 fixed to the measurement reference plate 61. Can be measured. That is, in this configuration, the distance "H1" from the intersection "X" of the face surface 10A and the inner peripheral surface 10B to the boss inner wall 10C of the ring gear 10 to be measured, and the ring gear 10 to be measured are placed. Surface plate surface 9A (outer end surface 10 of the measured ring gear 10)
It is possible to measure the distance "H2" up to the same as D).

Therefore, the ring gear measuring jig 1 is attached to the master of the ring gear 10 to be measured, which is formed with the standard dimensions, and the dial gauges 5, 7 and 8 that come into contact with the respective measurement points are set to "0". If the ring gear measuring jig 1 is attached to the ring gear 10 to be measured, each dial gauge 5
The reading of 7.8 will show the amount of error from the master,
This makes it possible to measure the error amount.

In order to correspond to the ring gear having a different diameter "D", the position of the boss inner wall 10C, and the axial thickness "H1", the movable side copying mechanism 3L is moved to a position corresponding to the diameter "D", and The measurement can be performed by adjusting the contact of the dial gauges 5, 7, and 8 so as to contact the measurement site.

[Advantages of the Invention] As described above, according to the ring gear measuring jig of the present invention, a plurality of types of ring gear having different angles of the tapered face surface and the tapered inner peripheral surface or different diameters are used. A general-purpose ring gear measuring jig capable of measuring

Therefore, it is not necessary to prepare a dedicated measuring gauge for each of all manufactured ring gears, the manufacturing cost of the measuring gauge can be reduced, a large storage space is not required, and management is easy.

[Brief description of drawings]

1 is a partial sectional front view of an embodiment of the present invention, FIG. 2 is a partial sectional plan view thereof, FIG. 3 is a sectional view taken along the line III-III of FIG. 1, and FIG. 4 is a sectional view of FIG. IV-IV sectional view, FIG. 5 is a sectional view of the ring gear. 5 …… Dial gauge (Measuring means for measuring the relative position of the copying jig) 6 …… Axial thickness measuring section (Measuring means for measuring the axial direction of the ring gear material) 10 …… Ring gear material 10A …… Taper -Shaped face surface 10B ... Tapered inner peripheral surface 41 ... Face side disc (face surface contact member) 42 ... Inner peripheral surface side disc (inner peripheral surface contact member)

Claims (1)

[Scope of utility model registration request] 1. A face surface abutting member that abuts a tapered face surface of a ring gear material along its taper, and an inner face that abuts a tapered inner peripheral surface adjacent to the tapered face surface along its taper. A copying jig, which is formed by arranging a peripheral surface abutting member adjacent to each other so as to be rotatable relative to each other, and forming an outer periphery of at least one of the abutting members in an arc shape with the relative rotational center point as a center. Two sets are arranged so that they can move relative to each other in the direction of separation and contact, and the contact surface between the measuring means for measuring the relative position of the two sets of copying jigs and the arcuate portion of the contact member of the two sets of copying jigs. A ring gear measuring jig having a measuring means for measuring the axial thickness of a ring gear material on which the copying jig is mounted by copying from the corresponding contact surface.