JPS62285064A - Mounting apparatus for wheel speed detecting gear for antiskid control brake system - Google Patents

Abstract

PURPOSE:To enable the maintaining of the accuracy of a pulse gear without transmitting a distortion, as generated during the mounting thereof to a wheel, to the pulse gear, by expanding a caulking groove near a hub bolt for mounting an acceleration hub larger than those at other parts. CONSTITUTION:An acceleration hub 3 is mounted on a wheel with a plurality of hub bolts 11. A range A in which a distortion near the respective hub bolts will affect a pulse gear 1 as generated by clamping with the bolts 11 shall be empirically about 10 deg. centered on the axis center of the acceleration hub 3. So, a caulking groove 8a which is expanded in width to make a 'play' between a caulking groove 8 of the acceleration hub 3 and a fitted part 4 of the pulse gear 1 within the range A is formed corresponding to various ranges A. The expansion range of the expanded caulking groove 8a shall be 2t almost doubling (t) when the width of the caulked groove 8 at other parts is represented by (t). This allows the 'play' 12 made to absorb a distortion caused by clamping each hub bolt 11.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention provides an anti-skid control brake system (Anti 5kid Control Brake System).
The present invention relates to an attachment device for attaching a wheel speed detection gear (hereinafter referred to as a pulse gear) used in a wheel speed detection gear (hereinafter referred to as a pulse gear) to an axle hub, and particularly relates to an attachment device that is attached by continuous caulking using a caulking roller.

[Conventional technology]

The anti-skid control brake system is a brake system that prevents the wheels from locking and the vehicle from skidding during sudden braking, and is also known as ES.
C (Electronic 5kid Control
) is also called. When this brake system controls the brake oil pressure by computer, a speed sensor is used to detect the rotational speed of the axle. A pulse gear is used in this speed sensor, and brake control is performed using a pulse signal corresponding to each tooth of the pulse gear as a detection signal.

As is well known, the pulse gear 1 has a ring shape, and toothed portions 2 at a predetermined pitch are formed at one end in the axial direction (see No. 91). The attachment of the Lusugya 1 to the front axle hub (hereinafter referred to as axle hub) 3 was as follows.

That is, as shown in FIG. 9, the other axial end portion (hereinafter referred to as a fitting portion) 4 of the pulse gear 1 is fitted to the outer periphery of the protrusion 5 of the axle hub 3. The axle hub 3 is screwed to a hub fixing plate 10.

Next, the gear presser plate 6 is brought into contact with one axial end surface of the pulse gear 1 coaxially with the axle hub 3, and the gear presser plate 6 is supported by the shaft 7. Then, while the pulse gear 1 is interposed between the axle hub 3 and the gear holding plate 6 and its axial movement is restrained, the caulking groove 8 formed continuously on the outer peripheral surface of the protrusion 5 of the axle hub 3 is inserted. Attachment is carried out by pressing the caulking roller 9 and sequentially pushing the fitting portion 4 of the pulse gear 1 into the caulking groove while rotating the entire assembly.

[Problem that the invention seeks to solve]

The problem with installing the conventional pulse gear 1 described above is that the axle hub 3 is attached with the pulse gear 1 installed.
Hub bolt 11 (see Figures 1 and 2) used to attach the wheel to the wheel (not shown)
This is the point where the nearby pulse gear 1 is deformed and coaxiality deteriorates.

That is, since the fitting portion 4 of the pulse gear 1 is tightly fitted into the caulking groove 8 of the axle hub 3 without any play, the strain of the axle hub 3 due to the tightening of each hub bolt 11 is transmitted to the fitting portion 4 of the pulse gear 1, and the strain is transmitted to the fitting portion 4 of the pulse gear 1. Transmitted strain □
This is because the pulse gear 1 is locally deformed. FIG. 10 shows the distortion (flatness) of the axle hub before (marked 0) and after (marked 0) assembly to the wheel. As is clear from FIG. 10, a large strain occurs before and after assembly to the wheel, with the hub bolt 11 being tightened at the point where it is tightened (marked with ↓). Moreover, FIG. 11 shows the runout accuracy when rotating the pulse gear 1 when it is assembled to the wheel.
It can be seen that it varies depending on the tightening portion of the hub bolt 11.

Such distortion in the pulse gear 1 causes irregularities in the pulse signal waveform and causes a decrease in wheel speed detection accuracy.
In turn, this may cause problems such as hindering the smooth operation of the brake system.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a mounting device that can maintain the accuracy of a pulse gear without transmitting the strain generated during mounting to a wheel to the pulse gear.

[Means for solving problems]

In order to solve the above problems, the present invention provides a ring-shaped wheel vehicle speed detection gear for an anti-skid control brake system having a gear portion formed on one end in the axial direction, and attaches the other end in the axial direction to the outer peripheral surface of the axle hub. In a mounting device for an axle speed detection gear that is fitted by a caulking roller into a caulking groove formed continuously in the circumferential direction, the caulking groove in the vicinity of the mounting hub bolt of the axle hub is caulked to another part of the caulking groove. It is characterized by being relatively wider than the groove.

[Effect]

According to the above configuration of the present invention, the caulking groove near the mounting hub bolt of the axle hub is made relatively larger than the caulking groove in other parts, so that there is a gap between the caulking groove near the hub bolt and the fitting portion of the pulse gear. can bring appropriate play to. As a result, the strain generated in the axle hub when the hub bolt is tightened is absorbed by the play area and is not directly transmitted to the pulse gear. Therefore, irregularities in the pulse signal waveform generated by the pulse gear can be prevented.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIRST EMBODIMENT FIGS. 1 to 4 show a first embodiment of the present invention. This first embodiment is an example in which the crimping groove 8 is enlarged by 1 width, as a specific embodiment in which the crimping groove 8a near the hub bolt of the axle hub 3 is made relatively larger than the crimping groove 8 in other parts.

As shown in FIGS. 1 and 2, the axle hub 3 is attached to a wheel (not shown) with a plurality of hub bolts 11. As mentioned above, when each hub bolt 11 is tightened, distortion occurs in the vicinity thereof, but empirically, the range A where the distortion affects the pulse gear 1 is approximately The range is about 10''.

Therefore, in this embodiment, in order to create a play between the caulking groove 8 of the axle hub 3 and the fitting part 4 of the pulse gear 1 in the range A affected by this strain, the caulking groove 8a is enlarged in width. are formed corresponding to each range A (see FIG. 4).

The enlarged width of the enlarged caulking groove 8a is approximately twice the width of the caulking groove 8 in other parts, which is 2t. However, this numerical value is not limited, and is a value that varies depending on the composition and characteristics of the pulse gear 1, the axle hub 3, the tightening of the hub bolt 11, etc., and is determined empirically as appropriate.

By forming caulking grooves 8a expanded in the width direction corresponding to each influence area A, as shown in FIG.
), a "play 12" is formed between the fitting portion 4 of the pulse gear 1 and the inner surface of the enlarged caulking groove 8a. This "play 12" absorbs the strain caused by tightening the hub bolt 11. FIG. 1(,) shows the relationship between the caulking groove 8 and the pulse gear 1 in another normal part.

A second embodiment of the present invention is shown in FIGS. 5 and 6. In contrast to the first embodiment described above, in which the width of the caulking groove is expanded, this second embodiment has a specific configuration in which the caulking groove near the hub bolt is made relatively wider than the caulking groove in other parts. This is an example in which the "depth" is expanded as a practical aspect.

As shown in FIG. 5, caulking grooves 8b with increased depth are formed in each part of the range A affected by the strain caused by tightening the hub bolt 11.

As shown in FIGS. 6(a) and 6(b), the enlarged width of the enlarged caulking groove 8b is as follows, assuming that the depth of the caulking groove 8 in other parts is d.
It is assumed to be approximately twice the value, that is, 2t. However, this numerical value is not limited, and since the composition and characteristics of the pulse gear 1 and the axle hub 3, the tightening of the hub bolt 11, etc. vary depending on the magnitude of the torque, etc., it shall be determined empirically as appropriate.

As shown in FIG. 6(a), by forming the caulking grooves 8b with increased depth to correspond to each influence range A, the fitting portion 4 of the pulse gear 1 and the enlarged caulking groove are formed as shown in FIG. 6(a). "Play 12" is formed between the inner surface of 8b,
This "play 12" absorbs the strain that sometimes occurs when tightening the hub bolt 11.

L-Shadow Embodiment FIGS. 7 and 8 show a third embodiment of the present invention. The shape of the fitting portion of the pulse gear 1 and the caulking groove of the axle hub 3 in this third embodiment are the same as those of the first embodiment.
, is different from that of the second embodiment. The different aspects are
Whereas in the first and second embodiments, the caulking grooves are continuously provided on the outer periphery of the axle hub 3 along the circumferential direction, in the case of the third embodiment, caulking grooves are continuously provided along the circumferential direction of the axle hub 3. The groove extends in the axial direction of the axle hub 3 and forms continuous irregularities in the circumferential direction, and the pulse gear 1 having a fitting portion having a corresponding shape is fitted into each of the caulking grooves.

In this third embodiment, in the range A affected by distortion, the width of the caulking groove 8C is wide<L(t') in the relative relationship with the caulking grooves of other parts, and the width of the caulking groove 8C is wider than L(t'). The inner area (S,) is made larger than the caulking groove (Sl) in other parts (so>sx) and larger than the surface area (S2) of the protrusion of the caulking roller (S, >S,). This is what I did.

As a result, as shown in FIGS. 7 and 8, the pulse gear 1
A play 1241 is formed between the fitting part 4 and the caulking groove 8C, and the presence of this W play 12 absorbs the strain that occurs when tightening the hub bolt 11, so that the pulse gear 1 is not deformed. .

Further, the torque resistance strength can be improved.

〔Effect of the invention〕

As described above, according to the configuration of the present invention, the caulking groove near the mounting hub bolt of the axle hub is made relatively larger than the caulking groove in other parts, so that the caulking groove near the hub bolt and the pulse gear are Appropriate play can be provided between the fitting part and the fitting part. As a result, the strain generated in the axle hub when the hub bolt is tightened is absorbed by the play area and is not directly transmitted to the pulse gear. Therefore, irregularities in the pulse signal waveform generated by the pulse gear can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged sectional view showing the first embodiment of the present invention, (a) is a sectional view taken along line I-1 in FIG. 2, (b) is a sectional view taken along 3 is a partial sectional view of FIG. 2, FIG. 4 is an enlarged view showing an example of an enlarged caulking groove, FIG. 5 is a plan view of the second embodiment, and FIG. ) is a mm-m sectional view in Fig. 5, and (b) is a cross-sectional view taken along the line IV-I.
V sectional view, FIG. 7 is a partially enlarged sectional view showing the third embodiment, FIG. 8 is a partially enlarged sectional view showing the fitted state of the axle hub and pulse gear, and FIG. 9 is an example of a conventional mounting device. FIG. 10 is an explanatory diagram showing the change in flatness before and after the arc-sle hub is assembled to the wheel, and FIG. 11 is an explanatory diagram showing the runout accuracy after the pulse gear is assembled. 1... Pulse gear, 2... Tooth profile portion, 30.・Axle hub, 4... Fitting part, 5... Projection of axle hub, 8... Caulking groove, 8a, 8b, 8c... Enlarged caulking groove, 11... Hub bolt, 12... Play .

Claims (4)

[Claims] (1) A caulking groove is formed continuously in the circumferential direction on the outer peripheral surface of the axle hub at the other end in the axial direction of the ring-shaped wheel speed detection gear for anti-skid control brake system with a gear part formed on one end in the axial direction. An anti-skid mounting device for a wheel speed detection gear fitted by a caulking roller, characterized in that among the caulking grooves, a caulking groove near the mounting hub bolt of the axle hub is enlarged from the caulking groove in other parts. Mounting device for wheel speed detection gear for control brake system. (2) The apparatus according to claim 1, wherein the caulking groove near the hub bolt is wider than the caulking groove in other parts by increasing its width. Wheel speed detection gear mounting device. (3) The device according to claim 1, wherein the caulking groove in the vicinity of the hub bolt is a deep groove so as to be wider than the caulking groove in other parts. Detection gear mounting device. (4) The device according to claim 1, characterized in that the width of the caulking groove near the hub bolt is expanded, and the inner area of the caulking groove is larger than the surface area of the caulking roller. A mounting device for wheel speed detection gears for anti-skid control braking systems.