CN207178473U - A kind of double-row angular contact bal bearing - Google Patents

Abstract

The utility model discloses a double-row angular contact ball bearing, which comprises an inner ring, an outer ring, steel balls, a cage, an inner sealing ring and a sealing mechanism. The inner ring is composed of two inner rings with completely identical shapes. split structure, the two sides of the two inner rings are chamfered, and a trapezoidal groove is formed in the middle of the outer wall of the inner ring, and an inner sealing ring is arranged in the trapezoidal groove, and the outer wall of the inner ring and the The grooves on the inner wall of the outer ring form double-row rolling grooves compatible with the steel balls. The steel balls are set on the cage, and the cage evenly distributes the steel balls in the double-row rolling grooves. The sealing mechanism is located in the inner At the upper opening between the ring and the outer ring, the sealing mechanism includes a dust cover, a rubber sealing ring, a stainless steel preload spring and a stainless steel skeleton. The inner sealing ring and the outer sealing mechanism of the bearing of the utility model can well prevent external foreign objects from entering the bearing, and at the same time prevent the lubricating grease inside the bearing from leaking out, thereby improving the transmission accuracy and service life of the bearing.

Description

A double row angular contact ball bearing

【Technical field】

The utility model relates to the technical field of bearings, in particular to the technical field of a double-row angular contact ball bearing.

【Background technique】

Bearings are widely used in rotating mechanisms to drive, support, reduce friction and bear loads. They are currently widely used in automobile wheels, machine tool spindles, oil pumps, air compressors, various transmissions, printing machinery, etc. There are many types of bearings, among which angular contact ball bearings can bear radial loads and axial loads at the same time, while double row angular contact ball bearings have better rigidity and can bear radial loads and axial loads acting in two directions , Double-row angular contact ball bearings can limit the bidirectional axial displacement of the shaft or housing, can withstand overturning moments, and are especially suitable for applications with high rigidity requirements. The reliability of the bearing directly affects the transmission accuracy and its service life. During the working process, the internal sealing effect of the bearing is not good, the external sealing ring is easy to fall off and other defects, resulting in iron oxide scale, cooling water, etc. Foreign matter from the outside enters the bearing, and the lubricating grease inside the bearing will also leak out, which will cause non-fatigue damage to the bearing, reduce the service life of the bearing, and increase the workload of workers to add grease and replace the bearing frequently.

【Content of utility model】

The purpose of the utility model is to solve the problems in the prior art, and propose a double-row angular contact ball bearing, which has a simple structure and good sealing performance, prolongs the service life of the bearing, and reduces the manpower and material cost of maintaining and replacing the bearing.

In order to achieve the above object, the utility model proposes a double-row angular contact ball bearing, including an inner ring, an outer ring, steel balls, a cage, an inner sealing ring and a sealing mechanism. The two inner rings are chamfered on both sides, and a trapezoidal groove is formed in the middle of the outer wall of the inner ring, and an inner sealing ring is arranged in the trapezoidal groove. The inner sealing ring has an upper and lower two-layer structure, the lower layer of the inner sealing ring is a trapezoidal structure matching the trapezoidal groove on the outer wall of the inner ring, the upper layer of the inner sealing ring has a rectangular structure, and there are two columns on the outer wall of the inner ring An arc-shaped groove matching the steel ball, the outer ring is in the shape of a ring, and the outer ring has an integrated structure, and there are two rows of arc-shaped grooves matching the steel ball on the inner wall of the outer ring The grooves on the outer wall of the inner ring and the inner wall of the outer ring form a double-row rolling groove that is compatible with steel balls. The steel balls are sleeved on the cage, and the cage clamps the inner ring and the outer ring Between the double-row rolling grooves of the ring, the cage evenly distributes the steel balls in the double-row rolling grooves. The sealing mechanism is located at the upper opening between the inner ring and the outer ring. The sealing mechanism includes a dust cover, a rubber sealing ring , stainless steel preload spring and stainless steel skeleton, the cross-section of the dust cover is U-shaped with different lengths on both sides, the U-shaped opening of the dust cover faces outward, and the U-shaped long side of the dust cover is embedded in the outer wall of the inner ring Above, the cross section of the stainless steel frame is L-shaped, the stainless steel preload spring and the stainless steel frame are both nested on the rubber sealing ring, and the rubber sealing ring is provided with a plurality of contact lips, and the contact lips are respectively against the dust cover and the stainless steel frame. On a stainless steel frame.

Preferably, the outer sides of the inner ring and the outer ring are rounded.

As a preference, the grooves on the outer wall of the inner ring and the inner wall of the outer ring are evenly distributed grooves, so that the steel balls can be positioned accurately, ensuring the consistency of the speed of the two rows of steel balls in the bearing, thereby reducing the The rotational speed difference of the two rows of bearing steel balls improves the utilization rate of the bearing and greatly increases the service life of the bearing.

Preferably, sealing mechanisms are provided on both sides between the inner ring and the outer ring.

Preferably, the section of the rubber sealing ring has a horizontal section and a vertical section, and the horizontal section and the vertical section of the rubber sealing ring are respectively bonded to the outer sides of the L-shaped cross-section of the stainless steel skeleton.

Preferably, the cavity formed between the inner ring, the outer ring and the sealing mechanism is filled with 9.5-12.5 g of grease, and 0.3-0.5 g of grease is evenly applied to the contact lip of the rubber sealing ring.

Preferably, the axial clearance of the double row angular contact ball bearing is 0.010-0.030 mm.

Beneficial effects of the utility model: the utility model can effectively prevent grease inside the bearing from leaking out and external foreign matter from entering the bearing by adding a sealing ring to the inside of the double-row angular contact ball bearing. The mechanism can better protect the bearing from damage and greatly improve the life of the bearing.

The features and advantages of the utility model will be described in detail through embodiments in conjunction with the accompanying drawings.

【Description of drawings】

Fig. 1 is a schematic cross-sectional structure diagram of a double row angular contact ball bearing of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of a sealing mechanism of a double-row angular contact ball bearing of the present invention.

In the figure: 1-inner ring, 2-outer ring, 3-steel ball, 4-cage, 5-inner sealing ring, 6-sealing mechanism, 11-inner ring, 12-trapezoidal groove, 13-cavity, 51-trapezoidal structure, 52-rectangular structure, 61-dust cover, 62-rubber sealing ring, 63-stainless steel preload spring, 64-stainless steel skeleton, 621-contact lip, 622-horizontal section, 623-vertical section.

【Detailed ways】

Referring to Fig. 1 and Fig. 2, a double row angular contact ball bearing of the utility model includes an inner ring 1, an outer ring 2, steel balls 3, a cage 4, an inner sealing ring 5 and a sealing mechanism 6, and the inner ring 1 It is a split structure composed of two inner rings 11 with exactly the same shape. Both sides of the junction of the two inner rings 11 are chamfered, and a trapezoidal groove 12 is formed in the middle of the outer wall of the inner ring 1, so The trapezoidal groove 12 is provided with an inner seal ring 5, the inner seal ring 5 is a two-layer structure, and the lower layer of the inner seal ring 5 is a trapezoidal structure 51 adapted to the trapezoidal groove 12 on the outer wall of the inner ring 1. The upper cross-section of the sealing ring 5 is a rectangular structure 52. There are two rows of arc-shaped grooves on the outer wall of the inner ring 1 that are compatible with the steel balls 3. The outer ring 2 is in the shape of a ring, and the outer ring 2 One-piece structure, there are two rows of arc-shaped grooves on the inner wall of the outer ring 2 that are compatible with the steel ball 3, and the grooves on the outer wall of the inner ring 1 and the inner wall of the outer ring 2 form a groove that is compatible with the steel ball 3. Adapted double-row rolling grooves, the steel balls 3 are set on the cage 4, and the cage 4 is clamped between the double-row rolling grooves of the inner ring 1 and the outer ring 2, and the cage 4 holds the steel balls 3 Evenly distributed in the double-row rolling grooves, the sealing mechanism 6 is located at the upper opening between the inner ring 1 and the outer ring 2, and the sealing mechanism 6 includes a dust cover 61, a rubber sealing ring 62, a stainless steel preload spring 63 and a stainless steel Skeleton 64, the cross section of the dust cover 61 is U-shaped with different lengths on both sides, the U-shaped opening of the dust cover 61 faces outward, and the U-shaped long side of the dust cover 61 is embedded on the outer wall of the inner ring 1, The cross-section of the stainless steel frame 64 is L-shaped, and the stainless steel pre-tension spring 63 and the stainless steel frame 64 are both nested on the rubber sealing ring 62. The addition of the stainless steel pre-tension spring 63 makes the sealing mechanism 6 more firmly fixed on the inner ring 1 and the upper opening between the outer ring 2, the rubber sealing ring 62 is provided with a plurality of contact lips 621, and the contact lips 621 are respectively against the dust cover 61 and the stainless steel frame 64, and the rubber sealing ring 62 passes through the dustproof The nesting cooperation of the cover 61, the stainless steel pre-tension spring 63 and the stainless steel frame 64 achieves a good sealing effect and plays the role of protecting the bearing and preventing dust.

The outer sides of the inner ring 1 and the outer ring 2 are all rounded, and the grooves on the outer wall of the inner ring 1 and the inner wall of the outer ring 2 are uniformly distributed, and the grooves are evenly distributed, so that the steel balls can be positioned accurately, ensuring the bearing The consistency of the speed of the two rows of steel balls when rotating, thereby reducing the speed difference between the two rows of bearing steel balls, improving the utilization rate of the bearings, and greatly improving the service life of the bearings. Both sides between the inner ring 1 and the outer ring 2 are provided with a sealing mechanism 6, the section of the rubber sealing ring 62 has a horizontal section 622 and a vertical section 623, and the horizontal section 622 and the vertical section of the rubber sealing ring 62 Sections 623 are respectively bonded to the outer sides of the L-shaped cross-section of the stainless steel skeleton 64, and the cavity 13 formed between the inner ring 1, the outer ring 2 and the sealing mechanism 6 is filled with 9.5-12.5g of grease, and the rubber seal Evenly apply 0.3-0.5 g of grease to the contact lip 621 of the ring 62 . The axial clearance of the double-row angular contact ball bearing is 0.010-0.030mm.

The working process of the utility model:

A double-row angular contact ball bearing of the utility model is generally installed on automobile hubs, machine tool spindles, oil pumps, etc. during the working process. Iron oxide scales, cooling water, etc. will inevitably be produced during the production and rolling process, and the inner sealing ring of the bearing and The external sealing mechanism can well prevent external foreign matter from entering the bearing, and at the same time prevent the lubricating grease inside the bearing from leaking out, which protects the bearing well and improves the transmission accuracy and service life of the bearing.

The above-mentioned embodiment is an illustration of the utility model, not a limitation of the utility model, and any scheme after a simple transformation of the utility model belongs to the protection scope of the utility model.

Claims (7)

1. A double-row angular contact ball bearing is characterized in that: it comprises an inner ring (1), an outer ring (2), a steel ball (3), a cage (4), an inner sealing ring (5) and a sealing mechanism ( 6), the inner ring (1) is a split structure composed of two inner rings (11) with exactly the same shape, the two sides where the two inner rings (11) meet are chamfered, and A trapezoidal groove (12) is formed in the middle of the outer wall of the inner ring (1), and an inner sealing ring (5) is arranged in the trapezoidal groove (12). The inner sealing ring (5) has a two-layer structure, the inner sealing The lower layer of the ring (5) is a trapezoidal structure (51) matching the trapezoidal groove (12) on the outer wall of the inner ring (1), and the upper layer of the inner sealing ring (5) has a rectangular structure (52). There are two rows of arc-shaped grooves on the outer wall of the ring (1) that are compatible with the steel balls (3). The outer ring (2) is in the shape of a ring. There are two rows of arc-shaped grooves on the inner wall of the ring (2) that are compatible with the steel balls (3). (3) Matching double-row rolling grooves, the steel balls (3) are set on the cage (4), and the cage (4) clamps the inner ring (1) and the outer ring (2) Between the double-row rolling grooves, the cage (4) evenly distributes the steel balls (3) in the double-row rolling grooves, and the sealing mechanism (6) is located on the top between the inner ring (1) and the outer ring (2). At the opening, the sealing mechanism (6) includes a dust cover (61), a rubber sealing ring (62), a stainless steel preload spring (63) and a stainless steel frame (64), and the section of the dust cover (61) is the length of both sides Different U shapes, the U-shaped opening of the dust cover (61) is facing outward, and the U-shaped long side of the dust cover (61) is embedded on the outer wall of the inner ring (1), and the section of the stainless steel skeleton (64) It is L-shaped, the stainless steel pre-tension spring (63) and the stainless steel skeleton (64) are all nested on the rubber sealing ring (62), and the rubber sealing ring (62) is provided with a plurality of contact lips (621), and the contact lip (621) leans against the dust cover (61) and the stainless steel skeleton (64) respectively. 2. A double row angular contact ball bearing according to claim 1, characterized in that: the outer sides of the inner ring (1) and the outer ring (2) are rounded. 3. A double row angular contact ball bearing according to claim 1, characterized in that: the grooves on the outer wall of the inner ring (1) and the inner wall of the outer ring (2) are evenly distributed. 4. A double row angular contact ball bearing according to claim 1, characterized in that: both sides between the inner ring (1) and the outer ring (2) are provided with sealing mechanisms (6). 5. A double row angular contact ball bearing according to claim 1, characterized in that: the section of the rubber sealing ring (62) has a horizontal section (622) and a vertical section (623), the rubber sealing ring ( The horizontal section (622) and the vertical section (623) of 62) are respectively bonded to the outer sides of the L-shaped cross-section of the stainless steel frame (64). 6. A double row angular contact ball bearing according to claim 1, characterized in that: the cavity (13) formed between the inner ring (1), the outer ring (2) and the sealing mechanism (6) 9.5-12.5g of grease is filled inside, and 0.3-0.5g of grease is evenly applied to the contact lip (621) of the rubber sealing ring (62). 7. The double-row angular contact ball bearing according to claim 1, wherein the axial clearance of the double-row angular contact ball bearing is 0.010-0.030mm.