JP2545370Y2 - Adjust nut rotation prevention device for axle device with hub reducer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) This invention relates to a structure for preventing an adjust nut from rotating in an axle device with a hub reduction gear.

(Prior Art) For example, as an axle device for a large truck, there is known an axle device in which a reduction gear is interposed between an axle shaft and a wheel hub to reduce load torque of a transmission, a differential mechanism, and the like ( JP-A-57-140227).

In such an axle apparatus, as shown in FIGS.
The gear carrier 3 of the speed reducer is fitted to the hub, and tightened by the adjustment nut 4 to apply a preload to the hub bearing 5 via the gear carrier 3. Reference numeral 6 denotes a lock plate for preventing the adjustment nut 4 from rotating. The tongue-shaped key portion 7 is assembled with a key groove 9 formed in the male screw portion 8 of the axle tube 1 and assembled. To join. The adjusting nut 4 has three screw holes 11 at equal intervals on the same circumference.
However, a large number of bolt holes 12 are also formed on the lock plate on the circumference corresponding to the screw holes 11. 13 shows a spring washer.

(Problems to be Solved by the Invention) By the way, the key portion 7 of the lock plate 6 and the key groove 9 on the axle tube 1 side are difficult to design due to many considerations in the selection of dimensions in manufacturing. There was a problem that the tongue-shaped key portion 7 was easily bent at the time of the punching process of No. 6 and the molding was difficult.

Then, this invention aims at eliminating the need for a lock plate to prevent the rotation of the adjust nut.

(Means for Solving the Problems) Therefore, in the present invention, in an axle device in which a speed reducer is interposed between an adjust nut and a wheel hub, the gear carrier of the speed reducer is spline-fitted around the axle tube, and then the adjustment is performed. After the nut is tightened to apply a preload to the hub bearing via the gear carrier, the rotation preventing structure is configured to couple the adjust nut to the gear carrier with a lock bolt. In addition, in the present invention, at least one of a through hole of the lock bolt provided in the adjust nut and a screw hole provided in the end face of the gear carrier corresponding to the through hole is provided in plural at the same radius.

(Operation) The adjust nut is securely prevented from rotating by coupling with the gear carrier fixed to the axle tube. The adjusting nut can be fixed at a position where an appropriate preload is applied according to the selection of the through hole or the screw hole of the lock bolt at the time of this connection.

(Embodiment) In FIGS. 1 and 2, reference numeral 20 denotes a gear carrier of a hub reduction gear fitted to a spline portion 22 on the outer periphery of an end portion of an axle tube 21, and reference numeral 23 denotes an adjustment nut screwed into a male screw portion 24. In this case, the nut 23 is connected to the gear carrier 20 via a lock bolt 26 at a tightening position where a preload is applied to the hub bearing 25 via the gear carrier 20.

The adjusting nut 23 has three bolt through holes 27 at equal intervals on the same circumference, and the gear carrier 20 has three bolt through holes 27 on the same circumference at angular positions corresponding to the arrangement of the bolt through holes 27. A screw hole 28 is formed by arranging three screw holes. 29
Indicates a spring washer.

With this configuration, the adjust nut 23 is prevented from rotating by the gear carrier 20 fixed to the axle tube 21 via the lock bolt 26. In this case, it is only necessary to connect the adjustment nut 23 to the gear carrier 20 with the lock bolt 26, and the number of parts is smaller than that of the conventional case. That is, since there is no need to provide a lock plate or a key groove, manufacturing is easy and cost-effective. It is also advantageous.

Further, by eliminating the need for the lock plate, the space can be used effectively, for example, the thickness of the adjusting nut 4 can be increased to increase the catch length of the effective screw (the screw loosening during the preload adjustment of the hub bearing 25). And it is effective for the omission countermeasure).

Further, since a plurality of through holes 27 or screw holes 28 through which the lock bolt 26 passes are formed on the same circumference, an appropriate preload is applied where any of these holes coincide with each other, and then the lock bolt 26 is removed. Can be tightened and fixed.

(Effects of the Invention) In summary, according to the invention, in an axle device in which a speed reducer is interposed between an adjust nut and a wheel hub, a gear carrier of the speed reducer is spline-fitted around the axle tube and the adjust nut is tightened. The preload is applied to the hub bearing via the gear carrier, and the adjust nut is connected to the gear carrier with a lock bolt, eliminating the need for a lock plate to prevent the adjust nut from rotating, reducing the number of parts and simplifying the configuration. Therefore, simplification of production and reduction of cost can be achieved. In addition, since at least one of the through hole of the adjust nut through which the lock bolt passes and the screw hole of the gear carrier are provided in plural at the same radius, there is an advantage that the preload can be appropriately given while having a simple structure.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of an axle device with a hub reducer showing an embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a partial sectional view of a conventional axle device with a hub reducer, FIG. 4 is an exploded perspective view thereof. 20 ... gear carrier, 21 ... axle tube, 22 ...
Spline part, 23 ... Adjust nut, 24 ... Male thread part, 25 ... Hub bearing, 26 ... Lock bolt.

Claims (1)

(57) [Scope of request for utility model registration] In an axle device having a speed reducer interposed between an adjust nut and a wheel hub, a gear carrier of the speed reducer is spline-fitted to an outer periphery of an axle tube, and then the adjust nut is tightened to connect the hub via the gear carrier. After the preload is applied to the bearing, the adjusting nut is connected to the gear carrier by a lock bolt. The locking nut has a rotation preventing structure, and a through hole of the lock bolt provided in the adjusting nut and a screw provided on the end face of the gear carrier corresponding to the through hole. An adjusting nut detent device for an axle device with a hub reduction gear, wherein at least one of the holes is provided in plural at the same radius.