CN201786923U

CN201786923U - Double-row ball-type slewing bearing

Info

Publication number: CN201786923U
Application number: CN2010205499526U
Authority: CN
Inventors: 刘成林
Original assignee: Xuzhou Fenghe Slewing Bearing Co Ltd
Current assignee: Xuzhou Fenghe Slewing Bearing Co Ltd
Priority date: 2010-09-27
Filing date: 2010-09-27
Publication date: 2011-04-06
Anticipated expiration: 2020-09-27

Abstract

The utility model discloses a double-row ball-type slewing bearing, belonging to a slewing bearing technical field. The double-row ball-type slewing bearing includes an inner ring, an outer ring, steel balls and a cylindrical roller; a rectangular inner-ring third groove is disposed between an inner-ring first groove and an inner-ring second groove; a rectangular outer-ring third groove is disposed between an outer-ring first groove and an outer-ring second groove; the inner-ring third groove and the outer-ring third groove are corresponding to form a third roller ring; the roller is disposed in the third roller ring; a second oil filling port and a third oil filling port are arranged on the outer wall of the outer ring; the second oil filling hole penetrates from the outer wall of the outer ring to the outer-ring second groove; and the third oil filling hole penetrates from the outer wall of the outer ring to the outer-ring third groove. In the utility model, steel balls and the roller are respectively lubricated so as to improve the service life of the bearing.

Description

Double ball-type slewing bearing

Technical field

The utility model relates to a kind of engineering goods, relates in particular to a kind of double ball-type slewing bearing, belongs to the pivoting support technical field.

Background technique

Pivoting support is a kind of large size bearing that can bear the special construction of combined loads such as bigger thrust load, radial load and tilting moment simultaneously, it integrates supporting, rotation, transmission, fixing and sealing, multiple function such as anticorrosion, be a kind of high-tech content, high value-added product, be widely used in equipment such as Hoisting Machinery, excavation machinery, Transport Machinery, mine metallurgical machinery, medical apparatus, radar, wind power generating set.

Pivoting support has a variety of models, as: single four-point contact ball slewing supporting, the double row reducing ball-type slewing bearing, single decussation roller formula pivoting support, three row's roller type pivoting supports or the like, existing pivoting support includes inner ring, outer ring and steel ball, the outer wall of described inner ring is along inner ring first groove and arc inner ring second groove that are circumferentially with arc, the inwall of described outer ring is circumferentially with outer ring first groove and outer ring second groove of arc, described inner ring first groove is corresponding with outer ring first groove, and formation rolling element circle one, described inner ring second groove is corresponding with outer ring second groove, and formation rolling element circle two, described steel ball is in rolling element circle one and rolling element circle two, the outer wall of described outer ring is provided with first oil hole, described first oil hole is through to outer ring first groove from the outer wall of outer ring, and be between the two ends of inner ring and outer ring that the sealing shape is movable to be cooperated, for fear of worn steel ball, guarantee the rollability that it is good, improve its life-span, generally need in the rolling element circle, inject lubricant oil, the oil hole of existing pivoting support manages to differ, but be inconvenient to pass through the oil hole oiling, raising along with mechanical precision, sealing dress degree is also higher between the two ends of inner ring and outer ring, make that the lubricant oil speed that infiltration is come in the first rolling element circle of the second rolling element circle is slower, influence the lubricity of the second rolling element circle, do not have the 3rd rolling element circle between the first rolling element circle of traditional pivoting support and the second rolling element circle, can't satisfy the needs of some precision optical machineries.

Summary of the invention

At the problem that above-mentioned prior art exists, the utility model provides a kind of steel ball that can guarantee to have good rolling characteristics, and oiling is convenient, is fit to the pivoting support of comparatively accurate mechanical requirements.

To achieve these goals, the technical solution adopted in the utility model is: a kind of double ball-type slewing bearing, comprise inner ring, outer ring and steel ball, the outer wall of described inner ring is along inner ring first groove and inner ring second groove that are circumferentially with arc, the inwall of described outer ring is circumferentially with outer ring first groove and outer ring second groove of arc, described inner ring first groove is corresponding with outer ring first groove, and formation rolling element circle one, described inner ring second groove is corresponding with outer ring second groove, and formation rolling element circle two, described steel ball is in rolling element circle one and rolling element circle two, the outer wall of described outer ring is provided with first oil hole, described first oil hole is through to outer ring first groove from the outer wall of outer ring, also comprise columniform roller, be provided with inner ring the 3rd groove of rectangle between described inner ring first groove and inner ring second groove, be provided with outer ring the 3rd groove of rectangle between outer ring first groove and outer ring second groove, described inner ring the 3rd groove is corresponding with outer ring the 3rd groove, and formation rolling element circle three, roller is in rolling element circle three, the outer wall of described outer ring is provided with second oil hole and the 3rd oil hole, described second oil hole is through to outer ring second groove from the outer wall of outer ring, and described the 3rd oil hole is through to outer ring the 3rd groove from the outer wall of outer ring.

Described the 3rd oil hole radially is provided with along the outer ring, and described first oil hole and second oil hole are and are obliquely installed, and the port of first oil hole and second oil hole is dispersed the both ends of the surface up and down towards the outer ring respectively.

Described first oil hole, second oil hole and the 3rd oil hole vertically distribute along the same straight line of the outer wall of outer ring.

Described first oil hole, second oil hole and the 3rd oil hole are four, and all evenly distribute along the outer wall of outer ring.

The beneficial effects of the utility model are both can pass through the first oil hole oiling, also can pass through the second oil hole oiling, avoided the lubricant oil of second rolling element to rely on the infiltration of the first rolling element circle to come, that so just sealing shape degree between the two ends of inner ring and outer ring can be done is better; Columniform roller in the rolling element circle three satisfies comparatively accurate mechanical requirements, and the 3rd oil hole can not only provide lubrication for roller simultaneously, can also provide lubricated for the steel ball at two ends up and down, has improved the life-span of bearing jointly.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Fig. 2 is a sectional view of the present utility model

Fig. 3 is the local enlarged diagram of Fig. 2

Among the figure: 1, inner ring, 2, the outer ring, 3, steel ball, 4, roller, 51, first oil hole, 52, second oil hole, the 53, the 3rd oil hole, 61, inner ring first groove, 62, inner ring second groove, 63, inner ring the 3rd groove, 71, outer ring first groove, 72, outer ring second groove, 73, outer ring the 3rd groove.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As a kind of mode of execution of the present utility model, consult Fig. 1, the utility model comprises inner ring 1, outer ring 2 and steel ball 3, the outer wall of described inner ring 1 is along inner ring first groove 61 and inner ring second groove 62 that are circumferentially with arc, the inwall of described outer ring 2 is circumferentially with outer ring first groove 71 and outer ring second groove 72 of arc, described inner ring first groove 61 is corresponding with outer ring first groove 71, and formation rolling element circle one, described inner ring second groove 62 is corresponding with outer ring second groove 72, and formation rolling element circle two, described steel ball 3 is in rolling element circle one and rolling element circle two, the outer wall of described outer ring 2 is provided with first oil hole 51, described first oil hole 51 is through to outer ring first groove 71 from the outer wall of outer ring, also comprise columniform roller 4, be provided with inner ring the 3rd groove 63 of rectangle between described inner ring first groove 61 and inner ring second groove 62, be provided with outer ring the 3rd groove 73 of rectangle between outer ring first groove 71 and outer ring second groove 72, described inner ring the 3rd groove 63 is corresponding with outer ring the 3rd groove 73, and formation rolling element circle three, roller 4 is in rolling element circle three, the outer wall of described outer ring 2 is provided with second oil hole 52 and the 3rd oil hole 53,2 outer wall is through to outer ring second groove 72 to described second oil hole 52 from the outer ring, described the 3rd oil hole 53 is through to outer ring the 3rd groove 73 from the outer wall of outer ring, 2 the radially setting of described the 3rd oil hole 53 along the outer ring, described first oil hole 51 and second oil hole 52 are and are obliquely installed, and the port of first oil hole 51 and second oil hole 52 is dispersed towards the outer ring 2 both ends of the surface up and down respectively, described first oil hole 51, the same straight line of second oil hole 52 and the 3rd oil hole 53 2 the outer wall along the outer ring vertically distributes, described first oil hole 51, second oil hole 52 and the 3rd oil hole 53 are four, and all 2 outer wall evenly distributes along the outer ring.

The utility model both can pass through 51 oilings of first oil hole, also can pass through 52 oilings of second oil hole, avoided the lubricant oil of second rolling element to rely on the infiltration of the first rolling element circle to come, that so just sealing shape degree between the two ends of inner ring 1 and outer ring 2 can be done is better; Columniform roller 4 in the rolling element circle three satisfies comparatively accurate mechanical requirements, and the 3rd oil hole 53 can not only provide lubrication for roller 4 simultaneously, can also provide lubricated for the steel ball 3 at two ends up and down, has improved the life-span of bearing jointly.

Claims

1. double ball-type slewing bearing, comprise inner ring (1), outer ring (2) and steel ball (3), the outer wall of described inner ring (1) is along inner ring first groove (61) and inner ring second groove (62) that are circumferentially with arc, the inwall of described outer ring (2) is circumferentially with outer ring first groove (71) and outer ring second groove (72) of arc, described inner ring first groove (61) is corresponding with outer ring first groove (71), and formation rolling element circle one, described inner ring second groove (62) is corresponding with outer ring second groove (72), and formation rolling element circle two, described steel ball (3) is in rolling element circle one and rolling element circle two, the outer wall of described outer ring (2) is provided with first oil hole (51), the outer wall of (2) is through to outer ring first groove (71) to described first oil hole (51) from the outer ring, it is characterized in that also comprising columniform roller (4), be provided with inner ring the 3rd groove (63) of rectangle between described inner ring first groove (61) and inner ring second groove (62), be provided with outer ring the 3rd groove (73) of rectangle between outer ring first groove (71) and outer ring second groove (72), described inner ring the 3rd groove (63) is corresponding with outer ring the 3rd groove (73), and formation rolling element circle three, roller (4) is in rolling element circle three, the outer wall of described outer ring (2) is provided with second oil hole (52) and the 3rd oil hole (53), the outer wall of (2) is through to outer ring second groove (72) to described second oil hole (52) from the outer ring, and the outer wall of (2) is through to outer ring the 3rd groove (73) to described the 3rd oil hole (53) from the outer ring.

2. double ball-type slewing bearing according to claim 1, it is characterized in that: (2) radially are provided with described the 3rd oil hole (53) along the outer ring, described first oil hole (51) is with second oil hole (52) and is obliquely installed, and the port of first oil hole (51) and second oil hole (52) is dispersed the both ends of the surface up and down of towards the outer ring (2) respectively.

3. double ball-type slewing bearing according to claim 1 is characterized in that: the same straight line of described first oil hole (51), second oil hole (52) and the 3rd oil hole (53) outer wall of (2) along the outer ring vertically distributes.

4. double ball-type slewing bearing according to claim 1 is characterized in that: described first oil hole (51), second oil hole (52) and the 3rd oil hole (53) are four, and all the outer wall of (2) evenly distributes along the outer ring.