Double row angular contact ball bearings

Abstract

The present invention provides a double-row angular contact ball bearing, comprising a first ball and a second ball arranged between the outer ring and the inner ring, a raceway for rolling with the two rows of rolling elements formed between the inner ring and the outer ring, the first ball being larger than the second ball, and a rib providing axial support force is respectively arranged on the inner side of the outer raceway corresponding to the first ball and the second ball, the axial support forces provided by the ribs corresponding to the first ball and the second ball are in opposite directions, the height of the rib corresponding to the first ball is greater than the height of the rib corresponding to the second ball, and the special load-bearing requirements of the double-row angular contact ball bearing can be achieved through the two rows of balls of different sizes and the ribs corresponding to the needle rollers, that is, the double-row angular contact ball bearing can withstand a small axial force in one direction when starting and a large axial force in another direction when working, the axial support force corresponding to the first ball is large and the bearing time is long, the service life is long and durable, and the bearing strength is high.

Description

Technical Field

[0001] The invention relates to a double-row angular contact ball bearing. Background Art

[0002] A bearing for a hydraulic torque converter of an engineering machinery needs to achieve such a function. When the diesel engine is first started, there is a small axial force. After the start-up is completed, the diesel engine flywheel generates a large axial force in the opposite direction of the small axial force, that is, the axial force generated during normal operation, and this axial force is very large. Generally, deep groove ball bearings can only withstand small axial forces, while tapered roller bearings can withstand large axial forces, but only in one direction. Although general double-row angular contact ball bearings can withstand bidirectional axial forces, their bearing capacity is insufficient and the bearing life is short. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a double-row angular contact ball bearing. Therefore, in view of the special load requirements, we need to design a double-row angular contact ball bearing that can withstand axial forces in one direction when starting and large axial forces in another direction when working.

[0004] To achieve the above-mentioned purpose, the present invention provides a double-row angular contact ball bearing, comprising an inner ring, an outer ring, and two rows of rolling elements arranged between the outer ring and the inner ring, a raceway for rolling in cooperation with the two rows of rolling elements is formed between the inner ring and the outer ring, the raceway comprises an arc-shaped inner raceway and an outer raceway, the two rows of rolling elements are respectively a first ball and a second ball, the first ball is larger than the second ball, and the outer raceways of the outer ring corresponding to the first ball and the second ball are respectively provided with ribs providing axial force on the inward side, the axial forces provided by the ribs corresponding to the first ball and the second ball are in opposite directions, and the force space acted on by the ribs corresponding to the first ball is larger than the force space acted on by the ribs corresponding to the second ball.

[0005] The beneficial effects of the present invention are as follows: by respectively setting two rows of rolling elements as the second ball and the first ball which is larger than the second ball, the smaller axial force generated when the torque converter starts to start is borne by the second ball and the outer ring cooperating with the rib of the second ball to bear the small axial force, and the larger axial force generated when the torque converter works normally is borne by the first ball which is larger than the second ball and the high rib corresponding to the first ball, so that the large axial force of the torque converter can be borne when the torque converter works normally, and the special load-bearing requirements can be met through the two rows of balls of different sizes and the ribs of the corresponding needle rollers, i.e. the double-row angular contact ball bearing which can withstand a small axial force in one direction when starting and a large axial force in another direction when working, the first ball correspondingly provides a large axial supporting force and a long bearing time, a long service life and durability, and a high bearing strength.

[0006] Furthermore, the first ball and the second ball are connected to each other corresponding to the inner raceway on the inner ring, and the angle formed by the line connecting the contact points between the centers of the first ball and the second ball and the inner ring and the outer ring and the radial plane of the bearing is 35°.

[0007] By adopting the above technical solution, the inner raceway connection setting of the inner ring can facilitate the installation of the first ball and the second ball, which is helpful for the installation effect of the installation space, so that the first ball and the second ball form point contact with the inner ring and the outer ring, thereby ensuring the axial load strength and overturning moment of the bearing.

[0008] Furthermore, the inner ring and the outer ring are formed with ball-filling notch grooves at the openings for installing the second ball, for the second ball to be installed and embedded in the raceway. The ball-filling notch grooves include an outer arc-shaped ball-filling notch groove arranged on the outer ring and an inner arc-shaped ball-filling notch groove arranged on the inner ring.

[0009] By adopting the above technical solution, during the installation process, the first ball is first installed at the installation position of the first ball corresponding to the outer ring and the inner ring. After a row of first balls is installed, the second ball is installed at the installation position of the second ball corresponding to the outer ring and the inner ring. During the installation of the second ball, if the second ball has difficulty entering the raceway, the second ball can be embedded into the position to be installed through the ball-filling notch groove. The ball-filling notch groove includes an arc-shaped outer ball-filling notch groove and an inner ball-filling notch groove, which facilitates the installation of the second ball, reduces the hard installation of the second ball and the inner and outer rings at the ball-filling notch groove, and is not easy to cause extrusion deformation and damage to the notch.

[0010] Furthermore, the ball-filling gap groove is gradually reduced in size from the opening axially inward and guides the installation of the second ball, and the smallest part of the ball-filling gap groove is larger than the diameter of the second ball.

[0011] By adopting the above technical solution, the ball-filling gap groove gradually decreases axially inward from the opening to guide the second ball into its installation position. The ball-filling gap groove is larger than the second ball to ensure its installation guiding effect.

[0012] Furthermore, a covering mechanism for covering the ball-filling notch groove is provided near the second ball on the outer ring, and the covering mechanism prevents the second ball from escaping in the axial direction.

[0013] By adopting the above technical solution, the covering mechanism can prevent the second ball from falling out of the filling ball notch groove after installation, and prevent the second ball from axially outwardly detaching from the raceway, thereby ensuring the normal operation of the bearing. If the second ball falls off, it is easy to cause unstable installation in the bearing, thereby preventing the disintegration of the bearing.

[0014] Furthermore, a mounting groove is provided at one end of the outer ring axially outward near the ball-filling notch groove, and the covering mechanism includes a fixing member arranged in the mounting groove and sliding along the length direction of the mounting groove, and a covering member connected to the end of the fixing member away from the mounting groove, and the covering member extends from the outer ball-filling notch groove toward the inner ball-filling notch groove.

[0015] By adopting the above technical solution, the outer ring is fixed, and the inner ring is axially driven so that the rib of the outer raceway of the outer ring provides axial support force. The length direction of the mounting groove is consistent with the axial direction of the bearing. The fixing part slidably installed in the mounting groove and the covering part connected to the fixing part can cover and shield the ball filling notch groove to prevent the second ball from falling out. The installation of the fixing part can facilitate the fixing of the covering part at the ball filling notch groove, thereby improving the covering stability.

[0016] Further, the fixing piece is provided with a cavity, and a locking mechanism is provided between the fixing piece and the installation slot, the locking mechanism includes an embedding slot arranged on the side wall of the installation slot and a plug-in unit movably arranged in the fixing piece cavity and plugged into and matched with the embedding slot, the plug-in unit includes a plug-in portion plugged into the embedding slot and a driving portion driving the plug-in portion to be separated from the embedding slot, the plug-in portion and the driving portion are connected and fixed in cooperation, and the driving portion can drive the plug-in portion to retract into the cavity and separate from the embedding slot.

[0017] By adopting the above technical solution, pressing the fixing piece can drive the embedding slot to align with the plug-in in the fixing piece cavity, and the plug-in part of the plug-in extends out of the cavity and is automatically locked, thereby locking the fixing piece and the installation slot to prevent the fixing piece from moving in the axial direction. The fixing piece can be simply locked, the locking effect is improved, and the locking steps are simplified.

[0018] Furthermore, a spring is provided at the bottom of the installation slot along the opening direction of the installation slot, and the fixing piece cooperates with the spring end to form a positioning structure, and the spring drives the fixing piece to move toward the notch of the installation slot after the plug-in portion is lifted and separated from the embedding slot.

[0019] By adopting the above technical solution, after the plug-in part of the plug-in is separated from the embedding slot, the fixing part is moved toward the notch of the installation slot by the spring, so that the plug-in part of the plug-in cannot fall into the embedding slot and be locked after being unlocked, thereby reducing self-locking after unlocking and improving the unlocking effect. The fixing part is popped outward for the convenience of the operator's use and the convenience of disassembly of the covering mechanism. The positioning mechanism can ensure the stability of the direction of the spring force.

[0020] Furthermore, the cavity includes a first channel for the plug-in part to be plugged in and a second channel for the driving part to move in the radial direction of the bearing, the opening direction of the second channel is consistent with the opening direction of the mounting groove, one end of the driving part extends out of the second channel, and the connection between the first channel and the second channel is set smaller than the length of the plug-in part.

[0021] By adopting the above technical solution, the driving part extends out of the fixing part and is driven by the operator, and the driving part can move in the direction away from the embedding slot, thereby driving the separation of the plug-in part and the embedding slot. The connection between the first channel and the second channel is smaller than the plug-in part, which prevents the plug-in part from being pulled out from the second channel toward the opening of the second channel, thereby ensuring the locking effect of the plug-in and the embedding slot.

[0022] Furthermore, an oblique cut is provided at one end of the plug-in portion that corresponds to the inserting slot for mating insertion, and the inclined surface of the oblique cut is arranged toward the pop-up direction of the fixing member.

[0023] By adopting the above technical solution, the plug-in part corresponds to the embedded slot and is gradually reduced in size at one end thereof, which makes it convenient to insert the lower part of the plug-in part into the embedded slot for locking, and also facilitates the separation of the lower end of the plug-in part from the embedded slot, making it easier for the lower end to be inserted into or leave the installation slot, thereby improving the locking and unlocking effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a three-dimensional structure in an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the explosion structure in an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of the structure between the rotating member and the fixed platform in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are further described below in conjunction with the accompanying drawings: Figure 1-3 As shown, a double-row angular contact ball bearing comprises an inner ring 1, an outer ring 2, and two rows of rolling elements arranged between the outer ring 2 and the inner ring 1. A raceway for rolling with the two rows of rolling elements is formed between the inner ring 1 and the outer ring 2. The raceway comprises an arc-shaped inner raceway 3 and an outer raceway 4. The two rows of rolling elements are respectively a first ball 5 and a second ball 6. The first ball 5 is larger than the second ball 6. The outer raceway 4 of the outer ring 2 corresponding to the first ball 5 and the second ball 6 is respectively provided with a rib 7 providing axial supporting force on the inner side. The axial supporting forces provided by the ribs 7 corresponding to the first ball 5 and the second ball 6 are in opposite directions. The height of the rib 7 corresponding to the first ball 5 is greater than the height of the rib 7 corresponding to the second ball 6.

[0028] The first ball 5 and the second ball 6 are connected to the inner raceway 3 on the inner ring 1, and the angle formed by the line connecting the contact points of the centers of the first ball 5 and the second ball 6 with the inner ring 1 and the outer ring 2 and the radial plane of the bearing is 35°.

[0029] In order to conveniently install the second ball 6 into the outer ring 2 and the inner ring 1, the inner ring 1 and the outer ring 2 are formed with a ball-filling notch groove 8 for the second ball 6 to be installed and embedded in the raceway at the opening where the second ball 6 is installed. The ball-filling notch groove 8 includes an outer ball-filling notch groove 9 in a circular arc shape provided on the outer ring 2 and an inner ball-filling notch groove 10 in a circular arc shape provided on the inner ring 1. The second ball 6 forms a point-contact rolling fit between the ball-filling notch groove 8, which reduces the friction between the ball-filling notch groove 8 and the second ball 6, making the rolling installation of the second ball 6 smoother.

[0030] The ball filling notch groove 8 is gradually reduced inwardly along the axial direction from the opening and guides the installation of the second ball 6. The smallest part of the ball filling notch groove 8 is larger than the diameter of the second ball 6. The smallest part is larger than the diameter of the second ball 6, and a large pressure can be released to embed the second ball 6 into its installation raceway to prevent it from falling out.

[0031] The ball-filling notch groove 8 is not likely to cause extrusion deformation and damage to the notch during the installation of the second ball 6, thereby improving the stability and service life of the bearing operation.

[0032] The outer ring 2 is provided with a covering mechanism 11 near the second ball 6 to cover the ball-filling notch groove 8, and the covering mechanism 11 prevents the second ball 6 from escaping in the axial direction.

[0033] The outer ring 2 is provided with a mounting groove 12 at one end axially outwardly close to the filling ball notch groove 8, and the covering mechanism 11 includes a fixing member 13 arranged in the mounting groove 12 and sliding along the length direction of the mounting groove 12, and a covering member 14 connected to the end of the fixing member 13 away from the mounting groove 12, and the covering member 14 is extended from the outer filling ball notch groove 9 toward the inner filling ball notch groove 10. The side of the covering member facing the second ball can be provided with a concave surface for fitting the second ball, so that the concave surface fits tightly with the second ball.

[0034] The fixing member 13 is provided with a cavity 15, and a locking mechanism 16 is provided between the fixing member 13 and the installation groove 12. The locking mechanism 16 includes an embedding slot 17 arranged on the side wall of the installation groove 12 and a plug-in 18 movably arranged in the cavity 15 of the fixing member 13 and plugged with the embedding slot 17. The plug-in 18 includes a plug-in portion 19 plugged with the embedding slot 17 and a driving portion 20 driving the plug-in portion 19 to be separated from the embedding slot 17. The plug-in portion 19 and the driving portion 20 are connected and fixed in cooperation, and the driving portion 20 can drive the plug-in portion 19 to retract into the cavity 15 and separate from the embedding slot 17.

[0035] A spring 21 is provided at the bottom of the installation slot 12 along the opening direction of the installation slot 12, and a positioning structure 22 is provided for the fixing member 13 to cooperate with the end of the spring 21 for positioning. After the plug-in portion 19 is lifted and separated from the insertion slot 17, the spring 21 drives the fixing member 13 to move toward the slot opening of the installation slot 12. The positioning structure 22 includes a slot provided at the rear end of the fixing member 13 for inserting and positioning the front end of the spring 21.

[0036] The cavity 15 includes a first channel 23 for the plug-in part 19 to be plugged in and a second channel 24 for the driving part 20 to move in the radial direction of the bearing. The opening direction of the second channel 24 is consistent with the opening direction of the mounting groove 12. One end of the driving part 20 extends out of the second channel 24. The connection between the first channel 23 and the second channel 24 is set smaller than the length of the plug-in part 19.

[0037] An oblique cut is provided at one end of the inserting portion 19 that is inserted into and matched with the inserting slot 17 , and the inclined surface of the oblique cut is arranged toward the ejection direction of the fixing member 13 .

[0038] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A double-row angular contact ball bearing, comprising an inner ring, an outer ring, and two rows of rolling elements arranged between the outer ring and the inner ring, wherein a raceway is formed between the inner ring and the outer ring for rolling with the two rows of rolling elements, wherein the raceway comprises an arc-shaped inner raceway and an outer raceway, and wherein: The two rows of rolling bodies are respectively the first ball and the second ball, the first ball is larger than the second ball, and the outer raceways of the outer ring corresponding to the first ball and the second ball are respectively provided with flanges providing axial support force on the inner side, the axial support forces provided by the flanges corresponding to the first ball and the second ball are in opposite directions, and the flange height corresponding to the first ball is greater than the flange height corresponding to the second ball; the first ball and the second ball are connected to the inner raceway on the inner ring, and the angle formed by the line connecting the contact points of the centers of the first ball and the second ball and the inner ring and the outer ring and the radial plane of the bearing is 35°; the inner ring and the outer ring are formed with ball-filling notch grooves for the second ball to be installed and embedded in the raceway at the openings for installing the second ball, The ball-filling notch groove comprises an outer ball-filling notch groove in the shape of an arc set on the outer ring and an inner ball-filling notch groove in the shape of an arc set on the inner ring; the ball-filling notch groove is gradually reduced axially inward from an opening and guides the installation of the second ball, and the smallest part of the ball-filling notch groove is larger than the diameter of the second ball; a covering mechanism for shielding the ball-filling notch groove is provided at a position of the outer ring near the second ball, and the covering mechanism prevents the second ball from escaping in the axial direction; an installation groove is provided at one end of the outer ring near the axial outward end of the ball-filling notch groove, and the covering mechanism comprises a fixing member arranged in the installation groove and sliding along the length direction of the installation groove, and a covering member connected to an end of the fixing member away from the installation groove, and the covering member extends from the outer ball-filling notch groove toward the inner ball-filling notch groove.

2. The double row angular contact ball bearing according to claim 1, characterized in that: The fixing piece is provided with a cavity, and a locking mechanism is provided between the fixing piece and the installation slot. The locking mechanism includes an embedding slot provided on the side wall of the installation slot and a plug-in unit movably provided in the fixing piece cavity and plugged into and matched with the embedding slot. The plug-in unit includes a plug-in portion plugged into the embedding slot and a driving portion driving the plug-in portion to be separated from the embedding slot. The plug-in portion and the driving portion are connected and fixed in cooperation, and the driving portion can drive the plug-in portion to retract into the cavity and separate from the embedding slot.

3. The double row angular contact ball bearing according to claim 2, characterized in that: A spring is arranged at the bottom of the installation slot along the opening direction of the installation slot, and the fixing piece cooperates with the spring end to form a positioning structure. The spring drives the fixing piece to move toward the notch of the installation slot after the plug-in portion is lifted and separated from the embedding slot.

4. The double row angular contact ball bearing according to claim 2, characterized in that: The cavity includes a first channel for the plug-in part to be plugged in and a second channel for the driving part to move in the radial direction of the bearing. The opening direction of the second channel is consistent with the opening direction of the mounting groove. One end of the driving part extends out of the second channel. The connection between the first channel and the second channel is smaller than the length of the plug-in part.

5. The double row angular contact ball bearing according to claim 3, characterized in that: An oblique cut is arranged at one end of the plug-in portion that is matingly plugged into the inserting slot, and the inclined surface of the oblique cut is arranged toward the ejection direction of the fixing member.

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