JPH0619042Y2 - Jig for measuring inner spline pointing surface - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a jig for measuring the entrance / exit of a pointing surface of a spline tooth from an end surface of a sleeve or the like having an inner spline.

[Conventional technology]

The distance from the end surface of the sleeve having the inner spline used for the automobile transmission to the pointing surface of the spline has an important relation to the shift performance and operability of the transmission.

The spline tooth 2 of the sleeve 1 having the inner spline shown in FIG. 6 is formed at a distance from the end surface 3 of the sleeve 1, in which case the pointing surface 2a at the end of the spline tooth 2 is curved and two The ridgeline where the pointing surface 2a intersects forms a curve of radius R, and the spline teeth 2
It is necessary to judge whether or not the distance x from the end face 3 of the sleeve 1 is within the standard range, with the intersection point 2b with the reference diameter D of 1 as the reference point.

However, since there is no index indicating the position of the reference point 2b, conventionally, the length between the end surface 3 of the sleeve 1 and the processed cut-up end of the pointing surface 2a, that is, y shown in FIG. 6 is measured with a caliper or the like. It was

[Problems to be solved by the invention]

If the length y between the end face 3 of the sleeve 1 and the processed cut-up end of the pointing face 2a is measured with a caliper as in the conventional case, the measurement point is unclear and the measured value differs depending on the measurer. Even a measurer has a different measurement value for each measurement, which makes the measurement extremely unstable.

Therefore, in the transmission using this spline, there are serious problems in operability, particularly gear disengagement.

An object of the present invention is to solve the above-mentioned problems and to provide a measuring jig capable of accurately measuring the amount of the pointing surface of the inner spline from the end surface of the sleeve.

[Means and Actions for Solving Problems]

The present invention provides three notched balls that contact the pointing surfaces of adjacent spline teeth of an inner spline and a predetermined phase (120 °) of these balls on the circumference of a predetermined diameter.
The jig for measuring the inner spline pointing surface is composed of a member that is arranged in (divided) and that is supported by protruding in the axial direction.

Place the sleeve with the inner spline on this jig, and
The spherical surfaces of the notched balls are brought into contact with the pointing surfaces of the teeth adjacent to the inner spline, and these balls are arrayed and supported on the circumference of a predetermined diameter in 120 ° divisions. Make accurate contact.

By measuring the vertical amount of these balls, the length from the end surface of the sleeve to the pointing surface of the spline can be accurately measured.

〔Example〕

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

FIG. 1 is a sectional view showing a state in which a sleeve having an inner spline is set on a measuring jig.

As shown in the front view of FIG. 4, the sleeve 1 has a large number of spline teeth 2 formed on the inner circumference of a cylinder.

FIG. 5 shows the measurement principle of the present invention.

The partially cut balls 6 are applied between the pointing surfaces 2a of the two adjacent spline teeth 2 of the sleeve 1, three such balls 6 are arranged at equal intervals, and the outer circumferences of these balls 6 have a diameter D ₁ The vertical amount of the ball 6 is measured in the state of being held at. Specifically, since the length of the sleeve 1 is accurately processed, the distance A between the upper end surface of the sleeve 1 and the lower surface of the ball 6 may be measured with a dial gauge.

In FIG. 1, the inner diameter of the base block 4 is D ₁
The ball holder 5 of FIG. 3 is fitted, and the three notched balls 6 are arranged inside thereof by the arc-shaped ball phasing 7, as shown in FIG. 3 which is a sectional view taken along line XX of FIG. The balls 6 are positioned and arranged at 120 ° intervals in the circumferential direction.
The sleeve 1 is placed on top of it, and the work holder 8 is placed on top of it and lightly pressed to keep the work horizontal. FIG. 2 is a front view showing this state, in which 9 is a knob of the work retainer 8 and 10 is a fitting shaft of the work retainer 8 to the base block 4.

If the work clamp 8 is not provided, the work will rattle and will not stabilize, making accurate measurement impossible. Work clamp 8 with vertical fitting shaft 10
By restricting with, the work can be held horizontally and stably.

The broken line portion of arrow B in FIG. 5 is enlarged and shown in FIG. Considering the pitch of the spline teeth 2 and the diameter of the ball 6, a part of the ball 6 is cut out so that each ball 6 contacts the adjacent two pointing surfaces 2a of the spline teeth 2 of the sleeve 1. The notch surface is matched with the inner peripheral surface of the ball holder 5.

The ball 6 contacts the pointing surface 2a at its spherical surface at the point p, and the outer diameter of the array of the notched surfaces of the ball 6 is regulated by the ball holder 5 to the designated diameter D _1. The edge position is determined by the distance of the pointing surface 2a from the end surface 3 of the sleeve 1.

The length t from the end surface 3 of the sleeve 1 can be obtained by measuring the length A from the upper end surface of the sleeve 1 to the lower edge of the ball 6 with a dial gauge. Therefore, whether or not x is within the standard range can be determined by the vertical amount t of the ball 6 without measuring the length of x, which is difficult to measure directly.

[Effect of device]

The present invention, by measuring the vertical amount of the ball that directly contacts the pointing surface of the spline tooth at a predetermined position,
It is possible to accurately measure the amount of movement of the pointing surface from the end surface of the sleeve or the like having the inner spline.

[Brief description of drawings]

1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a front view, FIG. 3 is a sectional view taken along line XX of FIG. 1, and FIG. 4 is a front view showing an inner spline. The figure is an enlarged sectional view for explaining the principle of measurement, and Fig. 6 is an enlarged sectional view of the inner spline.
FIG. 7 is an enlarged sectional view for explaining the measurement state. 1: Sleeve with inner spline 2: Spline tooth 2a: Pointing surface 3: End surface of sleeve 4: Base block 5: Ball holder 6: Cutting ball 7: Ball phase determination 8: Work clamp

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazuhiro Saito Kazuhiro Saito No.8 Tsutana, Fujisawa City, Kanagawa Prefecture Isuzu Motors Ltd. Fujisawa Plant (56) References JP-A-60-128301 (JP, A) 178409 (JP, U) Actual public Sho 56-47521 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. Three notched balls that come into contact with the pointing surfaces of adjacent spline teeth of an inner spline, and these balls are arranged on a circumference of a predetermined diameter in a predetermined phase and project in the axial direction. An inner spline pointing surface measuring jig consisting of a supporting member.