Lock ring for double-row full complement sealed cylindrical roller bearing and its processing and assembly method

Abstract

The present invention belongs to the technical field of bearings, and particularly relates to a locking ring for a double-row full complement sealed cylindrical roller bearing and its processing and assembly method. The locking ring includes an annular body. On the outer circumferential surfaces at both ends of the annular body, a plurality of T-shaped openings are provided. Locking blocks for locking the inner rings of two bearings are formed on both sides of the T-shaped openings of the annular body. The locking blocks warp radially outward along the annular body, and the warped locking blocks on both sides of the annular body are assembled into the locking ring installation grooves of the bearing inner rings. The structure of the locking ring of the present invention changes the force direction at the contact between the locking ring and the bearing inner ring, avoids the deformation of the locking blocks during the operation of the bearing, effectively ensures the stability of the locking ring assembly, and prevents the locking ring from falling off. At the same time, since the locking blocks for locking are formed by pre-cut T-shaped openings, there is a greater selection space for the material of the locking ring. Thicker strip steel and harder materials can be used, which can effectively ensure the locking force.

Description

Technical Field

[0001] The invention belongs to the technical field of bearings, and particularly relates to a locking ring for a double-row full complement sealed cylindrical roller bearing and a processing and assembly method thereof. Background Art

[0002] The double-row cylindrical roller bearings used in automotive gearboxes, reduction gearboxes of construction machinery, and gearboxes in the hoisting and transportation machinery industry require the bearings to have high load-bearing capacity, axial positioning function, and good sealing performance. Therefore, the bearings adopt a full complement design, and both the inner and outer rings need to have ribs. In order to install two rows of rollers, the inner ring is designed as a double inner ring. Therefore, in order to prevent the bearing from coming loose, a locking ring for connection needs to be provided between the two inner rings.

[0003] Currently, there are mainly two types of locking rings for the inner ring of such bearings. One is to stamp a strip into a U-shaped cross-section and open-ring, which is gathered and inserted into the inner diameter surface of the bearing during installation and expanded into the installation groove at the installation groove. This type of locking ring has poor integrity and a risk of falling. The second is to weld a strip into a ring, place it between the two inner rings, and then roll the two sides of the ring into the installation groove. This type of locking ring uses a softer material for easy rolling, so the locking force is limited. Summary of the Invention

[0004] According to the defects of the above-mentioned prior art, the purpose of the present invention is to provide a locking ring for a double-row full complement sealed cylindrical roller bearing and a processing and assembly method thereof, which can effectively ensure the locking force and stability of the locking ring.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a locking ring for a double-row full complement sealed cylindrical roller bearing, including an annular body. A plurality of T-shaped openings are provided on the outer circumferential surface at both ends of the annular body. Locking blocks for locking the two bearing inner rings are formed on both sides of the annular body at the T-shaped openings. The locking blocks warp outward along the radial direction of the annular body, and the locking blocks warping on both sides of the annular body are assembled into the locking ring installation groove of the bearing inner ring.

[0006] Further, the T-shaped opening includes a first cut and a second cut. The first cut extends axially from the end face of the annular body towards the center of the annular body, and the second cut extends towards both sides along the end of the first cut.

[0007] Further, the length of the first cut matches the width of the locking ring installation groove.

[0008] Further, the surface of the locking block formed by the second cut is in limit fit with the inner side rib of the locking ring installation groove.

[0009] Further, the annular body is formed by welding a strip.

[0010] Further, the T-shaped opening is formed by laser cutting.

[0011] Furthermore, the locking blocks warped on both sides of the annular body are formed by the annular body being pushed out by external force after assembly.

[0012] The double-row full complement sealed cylindrical roller bearing includes an outer ring and two inner rings. Two rows of rollers are fully assembled between the outer ring and the two inner rings. Axial displacement of the rollers is restricted by ribs provided at both ends of the inner ring. A sealing groove for installing a sealing ring is provided on the outer rib of the inner ring. The sealing lip of the sealing ring is in interference fit with the inner surface of the outer ring. Lock ring installation grooves are provided on the inner surfaces of the two inner rings on the side close to each other. Locking blocks on both sides of the lock ring are assembled in the lock ring installation grooves; Spring rings are provided on both sides of the outer diameter surface of the outer ring.

[0013] The processing and assembly method of the lock ring for the double-row full complement sealed cylindrical roller bearing is to assemble the annular body of the lock ring with a T-shaped opening cut thereon to the inner surface of the bearing inner ring, and push out the T-shaped opening of the annular body, so that the locking blocks formed on both sides of the T-shaped opening warp radially outward and are assembled into the lock ring installation grooves of the bearing inner ring.

[0014] Furthermore, assemble two rows of bearing inner rings and two rows of rollers respectively to form two sets of inner components. After installing one side of the inner component and the outer ring, place the lock ring, then place the other side of the inner component, and finally push in the locking blocks formed at the T-shaped opening of the lock ring in sequence.

[0015] Furthermore, weld a strip into the annular body of the lock ring, and perform laser cutting after stress relief to form a T-shaped opening.

[0016] The beneficial effects of the present invention are as follows: The lock ring structure of the present invention changes the force direction at the contact between the lock ring and the bearing inner ring, avoids deformation of the locking blocks during the operation of the bearing, effectively ensures the stability of the lock ring assembly, and prevents the lock ring from falling off; At the same time, since the locking blocks for locking are formed by the pre-cut T-shaped opening, there is a greater selection space for the lock ring material, and thicker strip and harder materials can be used, which can effectively ensure the locking force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the lock ring structure of the present invention

[0018] Figure 2 is Figure 1 the front view of the lock ring structure;

[0019] Figure 3 It is a schematic diagram of the lock ring assembled on the double-row full complement sealed cylindrical roller bearing;

[0020] Figure 4 is Figure 3 the cross-sectional view of the lock ring structure in

[0021] Figure 5 It is a schematic diagram of the laser cutting of the lock ring;

[0022] In the figure: 1. Ring-shaped body; 2. Locking block; 3. First cut; 4. Second cut; 5. Outer ring; 6. Inner ring; 7. Roller; 8. Sealing ring; 9. Spring ring; 10. Lock ring installation groove; 11. Lock ring. Specific embodiments

[0023] In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0024] See the attached Figures 1-5 , a lock ring for a double-row full complement sealed cylindrical roller bearing, comprising a ring-shaped body 1. A plurality of T-shaped openings are formed in the outer circumferential surfaces of the two ends of the ring-shaped body 1. Locking blocks 2 for locking the two inner rings of the bearing are formed on both sides of the T-shaped openings of the ring-shaped body. The locking blocks warp outward along the radial direction of the ring-shaped body. The warped locking blocks on both sides of the ring-shaped body are assembled into the lock ring installation grooves of the inner rings of the bearing.

[0025] Based on the above technical solution, it should be noted that due to the existence of the T-shaped openings, the locking blocks at the T-shaped openings have a certain degree of freedom relative to the ring-shaped body, forming a free end that is only connected to the ring-shaped body on one side. After the lock ring is assembled, through the action of an external force, the locking blocks warp outward. The two side surfaces of the warped part are respectively matched and limited with the two side edges of the lock ring installation groove. In this installation state, during the operation of the bearing, the acting force between the lock ring and the inner ring of the bearing is an axial force, while the radial force is required for the lock ring to fall off to restore the locking blocks to their original state. Since the directions of the two forces are different, it is ensured that the locking force of the lock ring will not decrease with the operation of the bearing, and the lock ring can be prevented from falling off.

[0026] Furthermore, the T-shaped opening includes a first cut 3 and a second cut 4. The first cut 3 extends axially from the end face of the ring-shaped body towards the center of the ring-shaped body, and the second cut 4 extends towards both sides along the end of the first cut. The length of the first cut 3 matches the width of the lock ring installation groove. The surface of the locking block 2 formed by the second cut 4 is in limiting fit with the inner side edge of the lock ring installation groove.

[0027] Furthermore, the ring-shaped body is formed by welding a strip. The T-shaped opening is formed by laser cutting.

[0028] Double-row full complement sealed cylindrical roller bearing, comprising an outer ring 5 and two inner rings 6. Two rows of rollers 7 are fully assembled between the outer ring and the two inner rings 6. Axial movement of the rollers is restricted by shoulders provided at both ends of the inner ring 6. A sealing groove for mounting a sealing ring 8 is provided on the outer shoulder of the inner ring. The sealing lip of the sealing ring 8 is in interference fit with the inner surface of the outer ring 5. Lock ring mounting grooves 10 are provided on the inner surfaces of the two inner rings 6 on the side where they are close to each other. Lock blocks on both sides of the lock ring are assembled in the lock ring mounting grooves 10. Spring rings 9 are provided on both sides of the outer diameter surface of the outer ring 5.

[0029] Processing and assembly method of a lock ring for a double-row full complement sealed cylindrical roller bearing. The lock ring annular body with a T-shaped opening cut is assembled to the inner surface of the bearing inner ring 6. The T-shaped opening of the annular body is pushed out, so that the lock blocks 2 formed on both sides of the T-shaped opening warp radially outward and are assembled into the lock ring mounting groove of the bearing inner ring.

[0030] Further, the two rows of bearing inner rings and the two rows of rollers are respectively assembled to form two sets of inner components. After one side of the inner component and the outer ring are installed, the lock ring is placed in, then the other side of the inner component is placed in, and finally the lock blocks formed at the T-shaped opening of the lock ring are pushed in successively.

[0031] Based on the above technical solution, the lock ring is assembled to the bearing inner ring in a positive annular state. The installation process is simple and convenient. After the lock ring is assembled, the lock blocks 2 are pushed up and assembled into the lock ring mounting grooves 10, which can effectively prevent the lock ring from falling off. Since the lock ring is pre-processed with a T-shaped opening, the external force required for the pushing-out process is small, which is convenient for operation and avoids the limitation on the material thickness of the lock ring.

[0032] Further, a strip is welded into the annular body of the lock ring, and after stress release, laser cutting is performed to form a T-shaped opening.

[0033] In the present invention, a strip is welded into a ring, and after stress release, laser cutting is performed as shown in the figure. After one side of the inner component and the outer ring are installed, the lock ring is placed in, then the other side of the inner component is placed in, and finally the free ends of the lock blocks formed after the lock ring is cut are pushed in successively.

[0034] For the lock ring of this structure, since the free ends of the lock blocks are easier to be pressed into the lock ring mounting groove, a thicker strip and a harder material can be used, and the laser cutting accuracy is higher.

[0035] It should be noted that the parts not detailed in the present invention are prior art.

[0036] The above are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments and there can be many variations. All variations that can be directly derived or associated by those of ordinary skill in the art from the content disclosed in the present invention should be considered within the protection scope of the present invention.

Claims

1. Lock ring for double-row full complement sealed cylindrical roller bearing, characterized in that: It includes an annular body. On the outer circumferential surfaces at both ends of the annular body, a number of T-shaped openings are provided. Locking blocks for locking the inner rings of two bearings are formed on both sides of the T-shaped openings of the annular body. The locking blocks warp outward along the radial direction of the annular body. The warped locking blocks on both sides of the annular body are assembled into the locking ring installation grooves of the bearing inner rings; the T-shaped openings include a first cut and a second cut. The first cut extends from the end face of the annular body along the axial direction towards the center of the annular body, and the second cut extends from the end of the first cut towards both sides; the warped locking blocks on both sides of the annular body are formed by the annular body being pushed out by an external force after assembly.

2. The retaining ring for a double-row full complement sealed cylindrical roller bearing according to claim 1, characterized in that: The length of the first cut matches the width of the locking ring installation groove.

3. The retaining ring for double-row full complement sealed cylindrical roller bearings according to claim 1, characterized in that: The surface of the locking block formed by the second cut is in limit fit with the inner side edge of the locking ring installation groove.

4. The locking ring for a double-row full complement sealed cylindrical roller bearing according to claim 1, characterized in that: The annular body is formed by welding a strip.

5. The snap ring for double-row full complement sealed cylindrical roller bearings according to claim 1, characterized in that: The T-shaped openings are formed by laser cutting.

6. The processing and assembly method of the snap ring for the double-row full complement sealed cylindrical roller bearing according to any one of claims 1-5, characterized in that: Assemble the locking ring annular body with T-shaped openings to the inner surface of the bearing inner ring, push out the T-shaped openings of the annular body, so that the locking blocks formed on both sides of the T-shaped openings warp outward along the radial direction and are assembled into the locking ring installation grooves of the bearing inner rings.

7. The processing and assembly method of the retaining ring for the double-row full complement sealed cylindrical roller bearing according to claim 6, characterized in that: Assemble two rows of bearing inner rings and two rows of rollers respectively to form two sets of inner components. After installing one side of the inner component and the outer ring, put the locking ring in, then put the other side of the inner component in, and finally push in the locking blocks formed at the T-shaped openings of the locking ring in sequence.

8. The processing and assembly method of the locking ring for the double-row full complement sealed cylindrical roller bearing according to claim 6, characterized in that: Weld the strip into the annular body of the locking ring, release the stress and then perform laser cutting to form T-shaped openings.

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