JPH0349297Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for attaching a bearing to a shaft.

[Prior art]

As shown in FIG. 1, a bearing 4 is supported by a snap ring 3 fitted into an annular groove 2 of a shaft 1, and a nut 5 is screwed into a threaded portion 1a of the shaft 1 as shown in FIG. supports the bearing 4.

etc. are known.

However, in the former case, the centrifugal force caused by the rotation of the shaft 1 causes the snap spring 3 to expand and come off, making the support of the bearing 4 unreliable. The problem is that the screws must be machined with a step, and the process is troublesome.

[Purpose of invention]

The purpose of the present invention is to enable a thrust bearing to be supported reliably and firmly without complicated and troublesome machining.

[Structure of the idea]

A plate is attached to the inner race of the bearing, a half plate is fixed to this plate with bolts, and the half plate is attached to the annular step of the shaft.

〔Example〕

FIG. 3 is a sectional view, and the shaft 1 has a bearing 4.
The inner race 4a is fitted and fixed to the protrusion 1b.
At the same time, a plate 7 having a hole 6 that fits into the shaft 1 is in contact with the other end surface of the inner race 4a, and a pair of half plates 8 are fixed to the plate 7 with bolts 9. The semicircular recesses 8a of the pair of half plates 8 fit into the annular groove 2 of the shaft 1 and abut against the annular step 2a.

The outer peripheral portion 7a of the plate 7 is thin so as not to interfere with the outer race 4b.

Therefore, the thrust force acting on the bearing 4 via the plate 7 and the half plate 8 can be reliably supported, and since the half plate 8 is fixed to the plate 7 with bolts 9, the shaft 1 cannot rotate. Since the bearing 4 does not come off, the bearing 4 can be supported reliably and firmly.

Further, since the annular groove 2 is simply formed on the shaft 1, processing is easy.

FIG. 5 is a partially broken explanatory view of a swash plate type axial piston pump using the bearing mounting device according to the present invention. This rotary shaft 12 contacts the end cap 10 via a plate 13 and a bearing 14 to support the reaction force of the spring that brings the cylinder block and valve plate into contact with the end cap 10.

Half plates 16, 16 are fixed to the plate 13 with bolts 17 via shims 15, and the semicircular recess 16a of the half plate 16 is connected to the rotation axis 1.
It is in contact with the annular step portion 18 of No. 2.

Because of this, it is possible to reliably and firmly support the spring reaction force (thrust force) acting on the rotating shaft 12, and there is no need to perform complicated machining on the rotating shaft 12.

[Effect of idea]

The thrust force acting on the bearing 4 can be reliably supported by the annular groove 2 of the shaft 1 via the plate 7 and the half plate 8, and the half plate 8 is bolted to the plate 7 so that even when the shaft 1 rotates. The bearing 4 can be supported reliably and firmly without coming off.

Furthermore, since the annular groove 2 only needs to be formed in the shaft 1, processing is simple.

In addition, the inner race 4a of the bearing 4 is connected to the shaft 1.
At the same time, after fitting the plate 7 to the shaft 1, fitting the semicircular recess 8a of the half plate 8 into the annular groove 2 and tightening and fixing the plate 7 to the plate 7 with bolts 9 is sufficient. Work becomes easier.

[Brief explanation of the drawing]

Figures 1 and 2 are sectional views of different conventional examples, Figure 3 is a sectional view of an embodiment of the present invention, and Figure 4 is a sectional view of an embodiment of the present invention.
The figure is a front view of the half plate, and FIG. 5 is a partially cutaway front view of the swash plate type axial piston pump. 1 is a shaft, 2a is an annular step, 4 is a bearing, 4
a is the inner race, 7 is the plate, 8 is the half plate, and 9 is the bolt.

Claims (1)

[Scope of utility model registration request] A projection 1b and an annular groove 2 are formed on the shaft 1, and an inner race 4a of the bearing 4 and a plate 7 that abuts the inner race 4a are respectively fitted between the projection 1b and the annular groove 2 on the shaft 1, A pair of half plates 8 each having a semicircular recess 8a that fits into the annular groove 2 is fixed to this plate 7 with bolts 9, and the semicircular recess 8a of the half plate 8 is inserted into the annular groove 2 of the shaft 1. A bearing mounting device characterized in that an inner race 4a is brought into contact with a protrusion 1b by a plate 7 in contact with an annular step 2a.