JPH0673442U - Machined cage - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a grease-lubricated machined cage used as a rolling element guide. A grease retaining function can be obtained even at high speed rotation, proper lubrication can be performed for a long period of time, and a cage guide function by rolling elements can be secured. [Structure] Rolling element guide type machined cage 4 for ball bearings
In, a plurality of grease storage grooves 9 are provided on the inner diameter surface along the circumferential direction. These grease reservoir grooves 9 are arranged separately on both sides of the center of the pocket 7 in the axial direction of the cage.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a machined cage for rolling bearings such as deep groove ball bearings, and more particularly to a machined cage having a grease retaining function as a rolling element guide.

[0002]

[Prior art]

 FIG. 3 shows a deep groove ball bearing using a conventional machined cage of rolling element guide. Reference numeral 11 is an inner ring, 12 is an outer ring, 13 is a rolling element, and 14 is a cage. A guide portion 16 of the rolling element 13 projects from the cutout pocket 15 of the cage 14 at the peripheral edge of the bottom portion. The guide portion 16 contacts the rolling element 13 to guide the cage 14. The inner diameter surface 14a of the cage 14 is formed into a flat cylindrical surface.

[0003]

[Problems to be solved by the device]

 A bearing using this type of machined cage 14 is usually used with oil lubrication, but may be used with grease lubrication for convenience of handling. However, since the inner diameter surface 14a of the cage 14 is a flat surface, the grease retaining function cannot be obtained, and the grease scatters due to centrifugal force during high-speed rotation, making it difficult to obtain appropriate lubrication for a long period of time. Therefore, the inventor of the present invention considered providing a grease accumulating groove on the inner diameter surface of the cage 14 in a circumferential shape. However, the rolling element guide portion 16 of the pocket 15 is missing at the grease accumulating groove portion, and the rolling element There is a problem that the cage guiding function of 13 is impaired.

An object of the present invention is to provide a grease retaining function even for high-speed rotation, to perform grease lubrication for a long period of time, and to secure a cage guide function by a rolling element. It is to provide a retainer.

[0005]

[Means for Solving the Problems]

 This invention is a ball guide roller cage type machined cage in which a plurality of grease retention grooves are provided on the inner diameter surface along the circumferential direction. These grease reservoir grooves should be arranged separately on both sides of the pocket center in the cage axial direction.

[0006]

[Action]

 By putting the grease in the grease reservoir groove provided on the inner diameter surface of the cage, the grease does not scatter even at high speed rotation, and the lubricating action is maintained for a long time. Although the formation area of the rolling element guide part of the pocket becomes smaller due to the formation of the grease reservoir groove, the grease reservoir groove is distributed on both sides of the pocket center, so it is located on both sides of the pocket center. The rolling element guide can be secured between the grease reservoir grooves. Therefore, it is possible to reliably guide the cage by the rolling elements while providing the grease reservoir groove on the inner diameter surface.

[0007]

【Example】

 An embodiment of this invention will be described with reference to FIGS. FIG. 1 (A) shows a deep groove ball bearing using this machined cage. A cage 4 for holding the rolling elements 3 is provided between the inner ring 1 and the outer ring 2. The cage 4 is a machined type, and is composed of a pair of split cages 4A and 4B (FIG. 1 (B)) which are mutually divided by a dividing surface a at the center in the axial direction. Both split cages 4A and 4B are connected to each other by tacks 5. The head of the tack 5 is housed in a counterbore 6 formed on the width surface of the cage 4. The counterbore 6 does not necessarily have to be provided.

The pocket 7 of the cage 4 is formed in a circular hole having an inner diameter in which the rolling element 3 is accommodated, and a guide portion 8 for the rolling element 3 projects at the peripheral edge of the bottom thereof. The upper surface of the guide portion 8 has a conical shape. Two grease reservoir grooves 9, 9 are formed on the inner diameter surface of the cage 4, and the grease reservoir grooves 9, 9 are arranged separately on both sides of the pocket center in the cage axial direction. As shown in FIG. 2 (A), due to the formation of the grease reservoir groove 9, the rolling element guide portion 8 has a missing portion 10, but both grease reservoir grooves 9, 9 are formed at the center of the pocket in the axial direction of the cage. The rolling element guide portion 8 is secured in the portion between them. That is, the rolling element guide portion 8 is formed by a pair of central plan portions 8a, 8a divided into four directions and a pair of end portion guide portions 8b, 8b.

According to the machined cage 4 having this structure, the grease is not scattered even at the high speed rotation by putting the grease in the grease reservoir groove 9 provided on the inner diameter surface, and the lubricating action is appropriate for a long period of time. Kept in. Although the groove 7 is formed in the rolling element guide portion 8 of the pocket 7 due to the formation of the grease reservoir groove 9, the grease reservoir groove 9 is arranged on both sides of the pocket center. The rolling element guide portion 8 can be secured in the portion between the grooves 9, 9. Therefore, the rolling elements 3 can be brought into contact with the guide portions 8a, 8a, 8b, 8b in four directions, and the cage 4 can be reliably guided by the rolling elements 3 while the grease accumulating groove 9 is provided on the inner diameter surface.

[0010]

[Effect of device]

 Since the machined cage of this invention has a grease reservoir groove on the inner diameter surface, the grease does not scatter even at high speed rotation, and long-term grease lubrication is possible. In addition, since the grease reservoir groove is distributed on both sides of the center of the pocket, the rolling element guide part can be secured between the grooves on both sides in the center of the pocket, so that a reliable cage for the rolling element can be provided.

[Brief description of drawings]

FIG. 1A is a partial sectional view of a bearing using a machined cage according to an embodiment of the present invention, and FIG. 1B is an enlarged sectional view of the cage.

FIG. 2A is a partially developed view of the cage viewed from the outer peripheral side, and FIG. 2B is a partial front view of the cage.

FIG. 3 is a partial cross-sectional view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Inner ring, 2 ... Outer ring, 3 ... Rolling element, 4 ... Retainer, 7 ... Pocket, 8 ... Rolling element guide part, 9 ... Grease reservoir groove

Claims (1)

[Scope of utility model registration request] 1. A ball bearing with a rolling element guide type machined cage, wherein a plurality of grease retaining grooves along the circumferential direction are provided on both sides of the center of the pocket in the axial direction of the cage. Without cage.