High-rotating-speed three-point ball turntable bearing

Abstract

The utility model belongs to the field of bearings, and particularly relates to a high-rotating-speed three-point ball turntable bearing which comprises an inner ring, an outer ring and steel balls, a plurality of steel balls are assembled in a raceway formed by the inner ring and the outer ring, every two adjacent steel balls are separated through a separation block, an annular guide groove is formed in the raceway of the inner ring, and the steel balls are arranged in the annular guide groove. Bosses matched with the guide grooves are arranged on the surfaces of the sides, close to the inner ring, of the isolation blocks, and the bosses of the multiple isolation blocks are embedded into the guide grooves of the inner ring. A three-point angular contact ball bearing structure is adopted, and the isolation block guide groove is formed in the middle of the inner ring and used for ensuring the correct rotation guide position of the isolation block and ensuring that the isolation block does not incline in the operation process. Meanwhile, an isolation block structure with a guide boss is designed, and the structure can be embedded into the inner ring of the bearing to ensure that the isolation block does not incline and operates stably at a high speed. According to the bearing structure, the rotating speed of the bearing can be increased, the highest rotating speed of the original bearing can be increased to more than 400 rpm from 60 rpm, and it is ensured that the isolation block does not incline.

Description

Technical Field

[0001] The utility model belongs to the field of bearings, and in particular relates to a high-speed three-point ball turntable bearing. Background Art

[0002] Four-point ball bearings are often used for turntable bearings, which are often used to withstand large overturning moments. The speed is often between a few revolutions to dozens of revolutions per minute. Under high-speed conditions, the traditional isolation block structure often becomes skewed, causing sticking and affecting the speed of the bearing. In addition, the traditional plastic structure cage is prone to wear at high speeds. Since the traditional cage structure has a low heat resistance temperature, high heat at high speeds will also cause the isolation block to deform. Summary of the invention

[0003] According to the above-mentioned prior art, the purpose of the utility model is to provide a high-speed three-point ball turntable bearing to solve the problem that the isolation block is skewed under the centrifugal force of high speed and the isolation block is horizontal in the raceway after being worn.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a high-speed three-point ball turntable bearing, including an inner ring, an outer ring and steel balls, a number of the steel balls are assembled in the raceway formed by the inner ring and the outer ring, and adjacent steel balls are separated by isolation blocks. An annular guide groove is provided on the inner ring raceway, and a boss matched with the guide groove is provided on the surface of the isolation block on one side close to the inner ring, and the bosses of several of the isolation blocks are embedded in the guide groove of the inner ring.

[0005] Furthermore, the cross section of the guide groove is a trapezoidal structure, and the axial width of the guide groove opening is greater than the axial width of the groove bottom.

[0006] Furthermore, contact grooves for assembling steel balls are arranged on two opposite surfaces of the isolation block, the two contact grooves are symmetrically distributed, and the surfaces of the contact grooves are spherical surfaces, which fit the surfaces of the steel balls.

[0007] Furthermore, the two contact grooves of the isolation block are provided with interconnected inner diameter through holes at the centers.

[0008] Furthermore, the main structure of the isolation block is a cylinder, the two contact grooves are respectively arranged on two circular end surfaces of the cylindrical isolation block, and the boss is arranged on the outer peripheral surface of the cylindrical isolation block.

[0009] Furthermore, the guide groove is arranged at the vertex of the inner ring raceway, the steel ball contacts the inner ring raceway at two points, and the two contact points are located on both sides of the guide groove; the steel ball contacts the vertex of the outer ring raceway.

[0010] Furthermore, the outer ring is provided with lubrication channels, each group of lubrication channels includes an axial lubrication channel and two radial lubrication channels that are connected, the axial lubrication channel axially penetrates the outer ring, and the two radial lubrication channels extend to the inner diameter surface of the outer ring and are distributed on both sides of the outer ring raceway.

[0011] Furthermore, an annular protrusion is provided in the middle of the inner diameter surface of the outer ring, and the outer ring raceway is formed on the inner surface of the annular protrusion.

[0012] Furthermore, sealing assemblies are respectively provided on both sides of the ball turntable bearing, and the sealing assemblies are arranged between the inner ring and the outer ring. The sealing assemblies include a dust cover, a first sealing ring and a second sealing ring. Mounting grooves are provided on both sides of the inner diameter of the outer ring, and stepped sealing grooves are provided on both sides of the outer diameter of the inner ring. The outer cylindrical surface of the dust cover is assembled in the mounting groove and sealed by the first sealing ring, and the inner cylindrical surface of the dust cover cooperates with the stepped sealing groove and is sealed by the second sealing ring.

[0013] Furthermore, the dust cover is connected to the side wall of the mounting groove by a plurality of axial bolts, and the first sealing ring is embedded in the side wall of the mounting groove to seal with the dust cover.

[0014] Furthermore, the stepped sealing groove includes a first step and a second step from the inside to the outside, and the cylindrical surface diameter of the first step is smaller than the cylindrical surface diameter of the second step; a first inner diameter ring opening and a second inner diameter ring opening are formed on the inner diameter side of the dust cover, the first inner diameter ring opening cooperates with the cylindrical surface of the first step, and the second inner diameter ring opening cooperates with the cylindrical surface of the second step, the inner diameter of the second sealing ring is embedded in the cylindrical surface of the second step, and the outer diameter of the second sealing ring is in contact and sealed with the outer end surface of the second inner diameter ring opening; protruding side stops are provided on both sides of the outer diameter of the inner ring, and the side stops are located on the inner side of the stepped sealing groove.

[0015] The beneficial effects of the utility model are as follows: the utility model adopts a three-point angular contact ball bearing structure, and a guide groove for the isolation block is opened in the middle of the inner ring to ensure the correct rotation guide position of the isolation block and ensure that the isolation block does not tilt during operation. At the same time, a isolation block structure with a guide boss is designed, which can be embedded in the inner ring of the bearing to ensure that the isolation block does not tilt at high speed and runs smoothly. The bearing structure of the utility model can increase the rotation speed of the bearing, and can increase the maximum rotation speed of the original bearing from 60rpm to more than 400rpm, which can ensure that the isolation block does not tilt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the high-speed three-point ball turntable bearing of the utility model;

[0017] Figure 2 It is a cross-sectional view of the isolation block structure;

[0018] Figure 3 It is a top view of the isolation block structure;

[0019] In the figure: 1, inner ring, 2, outer ring, 3, steel ball, 4, isolation block, 4.1 boss, 4.2 contact groove, 4.3 inner diameter through hole, 5, guide groove, 6, axial lubrication channel, 7, radial lubrication channel, 8, annular protrusion, 9, dust cover, 9.1 first inner diameter ring mouth, 9.2 second inner diameter ring mouth, 10, first sealing ring, 11, second sealing ring, 12, side stop. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0021] See attached Figure 1-3 A high-speed three-point ball turntable bearing comprises an inner ring 1, an outer ring 2 and steel balls 3. Several of the steel balls 3 are assembled in the raceway formed by the inner ring 1 and the outer ring 2. Adjacent steel balls are separated by an isolation block 4. An annular guide groove 5 is provided on the inner ring raceway. A boss 4.1 matching the guide groove is provided on the surface of one side of the isolation block close to the inner ring. Several bosses of the isolation blocks are embedded in the guide groove of the inner ring.

[0022] Furthermore, in order to facilitate the connection between the boss 4.1 and the guide groove 5, the cross section of the guide groove 5 is a trapezoidal structure, and the axial width of the guide groove opening is greater than the axial width of the groove bottom.

[0023] Furthermore, in order to ensure the normal rotation of the steel ball and avoid wear of the steel ball, contact grooves 4.2 for assembling the steel ball are provided on the two opposite surfaces of the isolation block 4. The two contact grooves 4.2 are symmetrically distributed, and the surface of the contact groove 4.2 is a spherical surface, which fits the surface of the steel ball.

[0024] Furthermore, in order to ensure the circulation of lubricating oil inside the bearing, the two contact grooves 4.2 of the isolation block are provided with a connected inner diameter through hole 4.3 at the center.

[0025] Furthermore, in order to adapt to the internal space of the bearing, the main structure of the isolation block 4 is a cylinder, the two contact grooves 4.2 are respectively arranged on the two circular end faces of the cylindrical isolation block, and the boss 4.1 is arranged on the outer peripheral surface of the cylindrical isolation block.

[0026] Furthermore, in order to avoid interference between the steel ball and the guide groove, the steel ball 3 contacts the raceway of the inner ring 1 at two points, and the two contact points are located on both sides of the guide groove 5; the steel ball 3 contacts the apex of the raceway of the outer ring 2.

[0027] Furthermore, in order to facilitate bearing maintenance and injection of external lubricating oil, a lubrication channel is provided on the outer ring, and each group of lubrication channels includes a connected axial lubrication channel 6 and two radial lubrication channels 7. The axial lubrication channel 6 passes through the outer ring 2 axially, and the two radial lubrication channels 7 extend to the inner diameter surface of the outer ring and are distributed on both sides of the outer ring raceway.

[0028] Furthermore, an annular protrusion 8 is provided in the middle of the inner diameter surface of the outer ring, and the outer ring raceway is formed on the inner surface of the annular protrusion 8. Two radial lubrication channels 7 are located on both sides of the annular protrusion 8.

[0029] Furthermore, in order to ensure the sealing effect of the bearing, sealing components are respectively provided on both sides of the ball turntable bearing, and the sealing components are arranged between the inner ring 1 and the outer ring 2. The sealing components include a dust cover 9, a first sealing ring 10 and a second sealing ring 11. Mounting grooves are provided on both sides of the inner diameter of the outer ring, and stepped sealing grooves are provided on both sides of the outer diameter of the inner ring. The outer cylindrical surface of the dust cover is assembled in the mounting groove and sealed by the first sealing ring 10, and the inner cylindrical surface of the dust cover cooperates with the stepped sealing groove and is sealed by the second sealing ring 11.

[0030] Furthermore, the dust cover 9 is connected to the side wall of the installation groove by a plurality of axial bolts, and the first sealing ring 10 is embedded in the side wall of the installation groove to seal with the dust cover 9 .

[0031] Furthermore, the stepped sealing groove includes a first step and a second step from the inside to the outside, and the cylindrical surface diameter of the first step is smaller than the cylindrical surface diameter of the second step; the inner diameter side of the dust cover is formed with a first inner diameter ring opening 9.1 and a second inner diameter ring opening 9.2, the first inner diameter ring opening 9.1 cooperates with the cylindrical surface of the first step, and the second inner diameter ring opening 9.2 cooperates with the cylindrical surface of the second step, the inner diameter of the second sealing ring 11 is embedded in the cylindrical surface of the second step, and the outer diameter of the second sealing ring 11 is in contact and sealed with the outer end surface of the second inner diameter ring opening 9.2; protruding side stops 12 are provided on both sides of the outer diameter of the inner ring, and the side stops 12 are located on the inner side of the stepped sealing groove. The side stops 12 can prevent the lubricating oil inside the bearing from entering the stepped sealing groove, the first inner diameter ring opening 9.1 cooperates with the cylindrical surface of the first step to prevent the lubricating oil inside the bearing from being thrown out under the action of the high-speed rotation of the bearing, and the second inner diameter ring opening 9.2 cooperates with the second sealing ring 11 to seal the bearing. The inner diameter side of the second inner diameter ring opening 9.2 is a stepped angle structure and is assembled with the notch on the outer diameter surface of the inner ring, which can position the dust cover 9 and play the role of a labyrinth seal.

[0032] The utility model adopts a three-point angular contact ball bearing structure, and opens an isolation block guide groove in the middle of the inner ring. The guide groove is an annular trapezoidal groove, which is used to ensure the correct rotation guide position of the isolation block and ensure that the isolation block does not tilt during operation. At the same time, a isolation block structure with a guide boss is designed, which can be embedded in the inner ring of the bearing to ensure that the isolation block does not tilt, and ensures that the isolation block does not tilt at high speed and runs smoothly. Solve the problem of isolation block tilting due to high-speed centrifugal force and isolation block sideways in the raceway after wear; increase the speed of the bearing, and the original maximum speed of the bearing can be increased from 60rpm to more than 400rpm.

[0033] It should be noted that the parts not described in detail in the present invention are prior art.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0039] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A high-speed three-point ball turntable bearing, characterized in that: It includes an inner ring, an outer ring and steel balls. Several of the steel balls are assembled in the raceway formed by the inner ring and the outer ring. Adjacent steel balls are separated by isolation blocks. An annular guide groove is opened on the inner ring raceway. A boss matched with the guide groove is arranged on the surface of the isolation block on one side close to the inner ring. Several bosses of the isolation blocks are embedded in the guide groove of the inner ring.

2. A high speed three-point ball turntable bearing according to claim 1, characterized in that: The two opposite surfaces of the isolation block are provided with contact grooves for assembling steel balls, the two contact grooves are symmetrically distributed, the surfaces of the contact grooves are spherical surfaces, and the spherical surfaces fit the surfaces of the steel balls; the two contact grooves of the isolation block are provided with a connected inner diameter through hole at the center.

3. The high-speed three-point ball turntable bearing according to claim 2, characterized in that: The main structure of the isolation block is a cylinder, the two contact grooves are respectively arranged on the two circular end surfaces of the cylindrical isolation block, and the boss is arranged on the outer peripheral surface of the cylindrical isolation block.

4. The high-speed three-point ball turntable bearing according to claim 1, characterized in that: The guide groove is arranged at the vertex of the inner ring raceway, the steel ball contacts the inner ring raceway at two points, and the two contact points are located on both sides of the guide groove; the steel ball contacts the vertex of the outer ring raceway.

5. The high-speed three-point ball turntable bearing according to claim 1, characterized in that: The outer ring is provided with lubrication channels, each group of lubrication channels includes an axial lubrication channel and two radial lubrication channels that are connected, the axial lubrication channel axially penetrates the outer ring, and the two radial lubrication channels extend to the inner diameter surface of the outer ring and are distributed on both sides of the outer ring raceway.

6. The high-speed three-point ball turntable bearing according to claim 1, characterized in that: An annular protrusion is arranged at the middle of the inner diameter surface of the outer ring, and the outer ring raceway is formed on the inner surface of the annular protrusion.

7. The high-speed three-point ball turntable bearing according to claim 1, characterized in that: A sealing assembly is provided on both sides of the ball turntable bearing, and the sealing assembly is provided between the inner ring and the outer ring. The sealing assembly includes a dust cover, a first sealing ring and a second sealing ring. Mounting grooves are provided on both sides of the inner diameter of the outer ring, and stepped sealing grooves are provided on both sides of the outer diameter of the inner ring. The outer cylindrical surface of the dust cover is assembled in the mounting groove and sealed by the first sealing ring, and the inner cylindrical surface of the dust cover cooperates with the stepped sealing groove and is sealed by the second sealing ring.

8. The high-speed three-point ball turntable bearing according to claim 7, characterized in that: The dust cover is connected to the side wall of the installation groove through a plurality of axial bolts, and the first sealing ring is embedded in the side wall of the installation groove to seal with the dust cover.

9. The high-speed three-point ball turntable bearing according to claim 7, characterized in that: The stepped sealing groove includes a first step and a second step from the inside to the outside, and the cylindrical surface diameter of the first step is smaller than the cylindrical surface diameter of the second step; the inner diameter side of the dust cover is formed with a first inner diameter ring opening and a second inner diameter ring opening, the first inner diameter ring opening cooperates with the cylindrical surface of the first step, and the second inner diameter ring opening cooperates with the cylindrical surface of the second step, the inner diameter of the second sealing ring is embedded in the cylindrical surface of the second step, and the outer diameter of the second sealing ring is in contact and sealed with the outer end surface of the second inner diameter ring opening; protruding side stops are arranged on both sides of the outer diameter of the inner ring, and the side stops are located on the inner side of the stepped sealing groove.

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