JPH067285Y2 - Nut seat pitch measuring device for wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measuring device that can easily and reliably measure a nut seat pitch of a wheel.

Conventionally, as shown in FIG. 1, when measuring a nut seat pitch P of a nut seat 2 formed on a wheel 1, when the nut seat 2 has a tapered shape, a tapered surface 3 as shown in FIG. The ball 4 is left stationary on the tapered surface 3 of the nut seat so as to come into contact with a position approximately midway between the upper end a and the lower end b of the ball, and the ball 4 between the two nut seats 2 for measurement shown in FIG. Measure inside or outside of the caliper with a caliper or micrometer, and
The total of the radii of the two balls 4 was obtained, and the nut seat pitch P was measured by adding or subtracting to the above measured value.

When the nut seat 2 has a spherical shape, the sphere 4 having the same arcuate surface as the spherical surface 5 of the nut seat 2 is used as shown in FIG. I was looking for the pitch P.

However, it is difficult to fix the sphere 4 by the conventional method, and it is difficult to measure it accurately.

The present invention has been made to eliminate the above drawbacks.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 3, the main body frame 6 is composed of a frame body provided with elongated holes 12, and two probes 7 are fixed to the elongated holes 12 by fixing nuts 8 respectively. .

The probe 7 includes a slide portion 13 formed by two flat surfaces having substantially the same interval as the elongated hole 12 of the main body frame 6, and the elongated hole 12
In addition to having a wider flange portion 14, a contact surface 15 with a nut seat of a wheel is formed in a lower portion of the collar portion 14, and a bolt 16 is planted in an upper portion of the slide portion 13.

In addition, a fixing nut 8 that is screwed into the bolt 16 of the probe 7
Has a diameter larger than that of the long hole 12.

Further, a dial gauge 9 is arranged between the probes 7, 7 of the main body frame 6 so as to be detachable and movable as necessary. The contact 10 of the dial gauge 9 is arranged so as to contact the side surface of the one probe 7, and the pitch measuring device 11 is configured.

In the pitch measuring device 11 configured as described above, when the probe 7 loosens the fixing nut 8, the sliding portion 13 and the long hole
Since it is in surface contact with 12, it slides smoothly in the slot 12,
Accurately positioned at the specified measurement position, and the fixing nut 8
When tightening the
It is fixed in a state perpendicular to.

Next, a method of using the pitch measuring instrument will be described.

First, one probe 7 is fixed to the main body frame 6, the fixing nut 8 of the other probe 7 is loosened, and the dimension between the probes 7 is preset to the nut seat pitch of the wheel that is determined. Set. Then, the loosened fixing nut 8 is tightened to fix the other probe 7 as well.

Next, the dial gauge 9 arranged between the probes 7 and 7 is fixed so that the contact 10 touches the side surface of the probe 7, and the scale of the dial gauge 9 is set to zero.
This makes the measurement ready.

Then, the fixing nut 8 of the probe 7 with which the contact 10 is in contact is loosened, and the probes 7 and 7 are pressed against the nut seats of the wheels. When the contact surfaces 15 of the respective probes 7, 7 come into close contact with the nut seat surface, the loosened fixing nut 8
Tighten.

Therefore, by reading the indication value of the dial gauge 9, the error of the nut seat pitch of the wheel with respect to the set nut seat pitch is accurately measured.

To set the distance between the probes 7 and 7, separately prepare a master jig having two holes at the same interval as the nut seat pitch of the wheel, and set the pitch in each hole of the master jig. The probes 7, 7 of the measuring device 11 are engaged to fix the probe 7.

When the pitch between the wheel nut seats is measured using the pitch measuring device 11 set in this way, the sum or difference between the measured value and the distance of the master jig is the nut seat pitch,
It is easier to measure. Further, the tip shape of the probe is appropriately matched with the shape of the nut seat to be measured.

Since the nut seat pitch measuring device of the present invention has the above configuration,
There is no need to prepare many types of balls according to the nut seat diameter as in the conventional measurement method, and the measurement procedure is simple when measuring wheels with the same pitch, so the measurement speed can be increased and the number of measurement steps can be increased. Can be significantly reduced.

Moreover, since the probe is fixed vertically to the main body frame during measurement, accurate measurement can be performed.

Moreover, because the dial gauge is placed between the probes, the measuring instrument can be configured with the minimum required size, and the nut seat pitch can be measured without interfering with the irregularities formed on the wheel disc. It will be possible.

Further, since it has a small number of constituent parts and a simple structure, it has many practical effects such as providing a nut seat pitch measuring device for a wheel which is easy to handle and inexpensive.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an automobile wheel, FIG. 2 (a),
(B) is a partially broken sectional view showing a conventional measuring method, and FIG. 3 is a partially broken perspective view showing one embodiment of a nut seat pitch measuring device for a wheel of the present invention. 1 ... Wheel 2 ... Nut seat 3 ... Nut seat taper surface 4 ... Sphere 5 ... Nut seat spherical surface 6 ... Body frame 7 ... Probe 8 ... Fixing nut 9 ... Dial gauge 10 ... … Contact element 11 …… Pitch measuring device for wheel 12 …… Oval hole 13 …… Sliding part 14 …… Flange part 15 …… Contact surface 16 …… Bolt

Claims (1)

[Scope of utility model registration request] 1. A main body frame comprising a frame body provided with an elongated hole, a slide portion formed by two planes having substantially the same spacing as the elongated hole of the main body frame, and a collar wider than the elongated hole of the main body frame. And a probe having a nut seat on the lower part of the flange part and a bolt planted on the upper part of the slide part, and a fixing screwed to the bolt provided on the probe. Comprised of a nut and a dial gauge having a contact, two probes can be slid in the elongated hole of the body frame, and can be fixed by holding the body frame with a fixing nut and a collar portion. And a dial gauge is arranged between the two probes so that the contact of the dial gauge contacts the side surface of one of the probes. Wheel nut seat pick Measuring instrument.