JPH062031Y2 - Ball bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is widely used for receiving a radial load of a rotating body of various industrial equipment, and one outer ring is formed by coupling two divided members together with a ball. The present invention relates to a ball bearing that does not have a retainer for supporting a bearing, and more specifically, to a joint structure of divided members forming an outer ring.

[Prior Art] This type of bearing has an advantage in that it has a simple structure, and a conventional type of this type of ball bearing shown in FIG. 3 can be exemplified. In this figure, reference numeral 1 denotes an outer ring, which is composed of members 1a and 1b which are divided into two parts on the left and right with a center line parallel to the annular end face thereof, and a cylindrical portion 1c is formed inside the left member 1a. Is fitted to the outer peripheral portion of the right member 1b, and the fitting surfaces of the both members are bonded by an adhesive to integrally bond both members. Reference numeral 2 denotes a ball, and a plurality of balls are inserted between a ball groove 3 formed in a V shape by the inclined surfaces of the respective members 1a and 1b of the outer ring 1 and an arc-shaped ball groove 5 formed on the outer periphery of the shaft body 4. It

The conventional ball bearing is constructed as described above. As a method for assembling the ball bearing, the ball groove 5 of the preload shaft body 4 is coated with grease, and the member 1a having the tubular portion 1c is used. The shaft 4 is penetrated through the central hole, the ball 2 is put in this state, and then the adhesive is applied to both of the members 1a and 1b, or one of the fitting surfaces thereof, and then the right member 1b is attached. It is inserted into the cylindrical portion of the left member 1a, and the two members are joined and fixed by the action of the adhesive to complete the process.

In the ball bearing thus constructed, the load applied to the shaft body 4 is received by the rolling surface of the ball groove 3 of the outer ring 1 via the ball 2 as in the case of a general radial ball bearing, and also in the shaft body 4. During the rotation, the ball 2 revolves between the shaft body and the outer ring 1 while rotating on its axis.

[Problems to be Solved by the Invention] However, in such a conventional ball bearing, since both members 1a and 1b constituting the outer ring 1 are mechanically coupled only by the adhesive action of the adhesive, the device used is in operation. Due to the vibration, impact, etc., the bonded portion is peeled off, the outer ring 1, the ball 2, and the shaft body 4 are separated from each other, and an appropriate gap cannot be maintained between them. In addition, since the grease-filled part and the adhesive-applied part are close to each other, it is difficult to separate the grease and the adhesive at the time of assembly, and if a little grease is mixed in the adhesive, the adhesive strength will decrease and the reliability will be impaired. I am worried about this.

The present invention has been made in order to solve the above problems, and an object thereof is to provide a ball bearing which can firmly bond the respective members constituting the outer ring.

[Means for Solving the Problems] This invention provides a groove extending between the fitting surfaces in the circumferential direction of both members constituting the outer ring, and a coupling member made of a material softer than the above members is provided in the groove. It is characterized in that the both members are integrally joined by this joining member by press-fitting and filling.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The same components as those of the conventional ball bearing shown in FIG. 3 are designated by the same reference numerals to simplify the description. In this embodiment, each member 1a, 1b constituting the outer ring 1
By forming a recess in the member 1a having the cylindrical portion 1c on the circumferential surface of the cylindrical portion, and on the other member 1b on the outer peripheral surface, these members 1a, 1b are formed. , In the state of being fitted in the cylindrical portion of the member 1a, the groove bottom expands in the radial direction by these both recesses, and a groove 6 having a substantially T-shaped cross section that opens to one end surface of the outer ring is formed. A connecting member 7 made of a metal softer than the members 1a and 1b is filled therein, and both members 1a and 1b are mechanically and firmly connected by this connecting member.

It should be noted that the assembly process including the connecting means includes the member 1a.
The inner peripheral surface of the cylindrical portion 1c and the outer peripheral surface of the other member 1b are each provided with a recess for forming the pre-groove 6 by cutting or the like, similar to the assembly in the conventional case. First, after grease is applied to the ball groove 5 of the shaft body 4, the shaft body is penetrated into the central hole of the member 1a, and in this state the balls 2 are arranged in the ball groove 5, and then the cylindrical portion of the member 1a is arranged. By fitting the member 1b to 1c, inserting the metal cylinder 7 which becomes the coupling member 7 into the groove 6 as shown in FIG. 2, and press-fitting this cylinder into the groove, This cylindrical body is crushed and filled in the groove in the state shown in FIG. 1 to complete.

[Effects of the Invention] The ball bearing according to the present invention is provided with a groove extending between both members as a connecting means for connecting the respective divided members of the outer ring as described above, and the connecting member made of a relatively soft metal material is provided in the groove. Since both parts are filled by filling, the connection between both parts is strong, and both parts do not easily separate due to vibration or shock, and the bearing performance is permanently retained and the reliability of the equipment using the bearing is improved. In addition, there is no inconvenience that the grease and the adhesive are mixed during assembly as in the conventional bearing.

[Brief description of drawings]

1 and 2 are sectional views of a ball bearing showing an embodiment of the present invention, and FIG. 3 is a sectional view of a conventional ball bearing. 1 ... Outer ring, 1a, 1b .... Member 1c ... Cylindrical part, 6 ............... Groove, 7 ......... Coupling member.

Claims (1)

[Scope of utility model registration request] 1. A tubular portion is formed at the inner end of one of the two members divided by a center line parallel to the end face, and the member is fitted to the outer peripheral portion of the other member in the tubular portion. In the ball bearing that constitutes the outer ring, a groove extending over both members is provided on both fitting surfaces of the inner peripheral surface of the tubular portion of one member and the outer peripheral surface of the other member facing the inner peripheral surface. A ball bearing characterized in that both members are integrally joined by press-fitting and filling a joining member softer than these members into the groove.