Gearbox combined bearings

Abstract

The present invention discloses a gearbox combined bearing, comprising an outer ring and a retaining ring for sleeved on the outer ring after being heated by a heating process, a groove is circumferentially provided on the outer peripheral wall of the outer ring, a boss is circumferentially provided on the inner peripheral wall of the retaining ring for being close to the opening of the groove after being heated by a heating process and pressed into the groove by an external pressure device when the retaining ring is cooled, a first limiting structure for limiting the boss from escaping from the groove is provided on the right side of the groove, and a second limiting structure for limiting the boss from escaping from the groove is provided on the left side of the groove. The present invention solves the problem that the traditional retaining ring and the outer ring of the bearing need to be assembled manually, resulting in low assembly accuracy, poor assembly efficiency, and easy separation of the retaining ring and the outer ring of the bearing.

Description

Technical Field

[0001] The invention relates to the technical field of gearbox combined bearings, in particular to a gearbox combined bearing. Background Art

[0002] As the number of cars with automatic transmissions continues to increase, in order to achieve improved shaft support rigidity and shortened transmission length, the demand for plated ball bearings (combined unit bearings) used in the bearings is increasing. Existing plated bearings rely on manual assembly of the three components of bearings, pressure plates and retaining rings, so automation cannot be achieved, production efficiency is low, and the pressure plate is prone to fall off from the outer ring of the bearing. That is, the traditional solution is to open a retaining ring groove on the outer ring of the bearing, install the retaining ring into the retaining ring groove, and squeeze the three arc convex points on the retaining ring through external force so that the arc convex points and the retaining ring are tightly matched to achieve the pressure plate sleeve on the outer ring of the bearing and the fixed connection between the pressure plate and the outer ring of the bearing. The entire press-fitting method is inefficient, and manual assembly will result in low assembly accuracy and the retaining ring will easily fall out of the retaining ring groove after assembly, resulting in failure of the connection between the pressure plate and the outer ring of the bearing. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a gearbox combined bearing to solve the problems that the traditional assembly of a retaining ring and a bearing outer ring requires manual assembly, resulting in low assembly precision, poor assembly efficiency, and easy separation of the retaining ring and the bearing outer ring.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a gearbox combined bearing, including an outer ring and a retaining ring that is mounted on the outer ring after being heated by a heating process, a groove is circumferentially provided on the outer circumferential wall of the outer ring, and a boss is circumferentially provided on the inner circumferential wall of the retaining ring for being close to the opening of the groove after being heated by a heating process and pressed into the groove by an external pressure device when the retaining ring is cooled, a first limiting structure for limiting the boss from escaping from the groove is provided on the right side of the groove, and a second limiting structure for limiting the boss from escaping from the groove is provided on the left side of the groove.

[0005] The advantages of adopting the above technical scheme are as follows: when it is necessary to install the retaining ring on the outer ring of the bearing, the retaining ring is heated. After being heated by the external automatic heating tool, the retaining ring is affected by the principle of thermal expansion and contraction to gradually increase the inner diameter of the shaft hole. When the inner diameter of its boss is larger than the outer diameter of the outer ring, it is sleeved on the outer ring of the bearing by external automatic installation equipment and the boss is set close to the opening of the groove, that is, the boss is aligned with the groove. As the retaining ring cools, the boss is gradually placed into the groove under the influence of the principle of thermal expansion and contraction. At this time, the boss is pressed into the groove by external pressure equipment, thereby realizing the matching of the boss and the groove and the assembly of the retaining ring and the outer ring of the bearing. The boss is limited by the setting of the first limiting structure and the second limiting structure to avoid the bearing being affected. External stress loading causes the boss to escape from the groove or the retaining ring to separate from the outer ring of the bearing; the above-mentioned technology is set up to achieve automated assembly of the retaining ring and the outer ring of the bearing, that is, the above-mentioned pressure equipment, heating tooling, and equipment for pushing the retaining ring to move to the outer ring are all existing technologies, such as stamping machines, electromagnetic heating coils, robotic arms and other automated equipment, which can be used through an assembly line to achieve the above steps and then realize automated assembly of the retaining ring and the outer ring, thereby improving assembly efficiency and assembly accuracy. At the same time, the first limiting structure and the second limiting structure are set up to increase the connection strength between the retaining ring and the outer ring, thereby avoiding separation of the retaining ring and the outer ring. The above-mentioned technology is set up to reduce labor costs and improve production efficiency.

[0006] The present invention further provides: the first limiting structure includes a side guard group which is deformed after being heated by a heating process and is inclined relative to the right side wall of the groove, the side guard group includes a first side guard circumferentially opened on the right side wall of the boss and a second side guard circumferentially opened on the right side wall of the groove, the first side guard is arranged to be inclined relative to the right side wall of the groove, the second side guard is arranged to be inclined relative to the right side wall of the boss, the first side guard and the second side guard are arranged to be relatively parallel and the gap between the first side guard and the second side guard is matched to form a matching gap.

[0007] The benefit of adopting the above technical solution is that: in the above technology, the boss is set by cooperating with the first rib and the second rib, that is, when the boss shakes or loosens or escapes from the groove, the boss applies a force to the second rib through the first rib, and the force acts on the second rib. The first rib and the second rib cooperate to limit the shaking or loosening of the boss, thereby improving the limiting strength of the boss, thereby improving the connection strength between the retaining ring and the outer ring.

[0008] The present invention further provides that: the first flange and the second flange are both made of shape memory alloy material, the first flange has a first form within a first temperature range, the first flange has a second form within a second temperature range, the first flange is deformed and swings toward the right side wall of the groove in the first form and is inclined relative to the right side wall of the groove, the first flange is reset in the second form and is fitted to the right side wall of the boss, the second flange has a third form within the first temperature range, the second flange has a fourth form within the second temperature range, the second flange is deformed and swings toward the right side wall of the boss in the third form and is inclined relative to the right side wall of the boss, and the second flange is reset in the fourth form and is fitted to the right side wall of the groove.

[0009] The advantages of adopting the above technical solution are as follows: in the above technology, the first rib and the second rib are both made of shape memory alloy, and the shape memory alloy will deform within a certain temperature range, that is, the internal temperature of the bearing will gradually rise when the bearing is running, and will gradually rise to above 30 degrees, that is, reach the first temperature range. Within the first temperature range, the first rib will deform and swing toward the right side wall of the groove until the first rib and the right side wall of the groove are relatively inclined, and the second rib will deform and swing toward the right side wall of the boss within the first temperature range until the second rib and the right side wall of the boss are relatively inclined. At this time, the first rib is arranged in parallel with the second rib. When the boss shakes or loosens or tends to fall out of the groove, the first rib is limited by the second rib, making it difficult for the boss to fall out of the groove, while reducing the shaking or loosening amplitude, thereby improving the limiting strength of the boss, and then improving the stability of the boss in the groove, thereby avoiding The retaining ring is separated from the outer ring of the bearing; when the bearing stops running or is not running, the bearing temperature gradually drops, that is, drops below 30 degrees, which is the second temperature range. In the second temperature range, the first rib will fit with the right side wall of the boss, and the second rib will fit with the right side wall of the groove, thereby making the boss limit invalid, that is, the first rib and the second rib no longer cooperate and limit each other, so that the boss can be heated by a heating process and thus escape from the groove, that is, the above-mentioned technology is set to facilitate the assembly and disassembly of the bearing, thereby improving the assembly efficiency and avoiding the restriction of the first rib and the second rib during assembly, which increases the difficulty of assembly; in the above-mentioned technology, shape memory alloy is an intelligent material with unique physical properties, which can restore its original shape under specific conditions, that is, shape memory alloy is an alloy material that can completely eliminate its deformation at a lower temperature after heating and restore its original shape before deformation.

[0010] The present invention is further provided that: a plurality of first mating edges are evenly distributed circumferentially on the outer circumferential wall of the first rib, a plurality of second mating edges are evenly distributed circumferentially on the outer circumferential wall of the second rib, a plurality of the first mating edges correspond to a plurality of the second mating edges one by one and are arranged in contact with each other, and the first mating edges and the second mating edges are both arranged in a mating gap.

[0011] The benefits of adopting the above technical solution are: when the first rib and the second rib are parallel and matched, the first matching edge will match with the corresponding second matching edge, and then when the first matching edge and the second matching edge match, the boss can be limited from shaking or loosening, thereby improving the stability of the boss in the groove. At the same time, when the boss is subjected to high axial or radial loads, part of the load will be transmitted to the second rib through the boss, the first rib, and the first matching edge, so that the outer ring can bear part of the load, thereby avoiding the problem of damage or limit failure of the boss due to high loads, thereby avoiding stress concentration, thereby improving the service life of the boss.

[0012] The present invention is further provided that: the radial cross-section of the first mating edge and the radial cross-section of the second mating edge are both arc-shaped, the first mating edge and the second mating edge both include a raised portion and two end portions, the two end portions of the first mating edge are respectively connected to the first guard edge, the two end portions of the second mating edge are respectively connected to the second guard edge, a number of raised portions of the first mating edges correspond one to one with a number of raised portions of the second mating edges and are staggered, and adjacent raised portions of the first mating edges are gap-fitted with an insertion gap for the raised portions of the adjacent second mating edges to be inserted.

[0013] The benefit of adopting the above technical solution is that: in the above technology, both the first mating edge and the second mating edge include a raised portion, that is, when the first mating edge is inserted into the corresponding insertion gap, the raised portion of the first mating edge respectively abuts against the two adjacent raised portions of the second mating edges, thereby realizing torque guidance, so that when the first retaining edge is subjected to excessive load, the torque is dispersed through the first mating edge, thereby avoiding stress concentration that may cause damage to the first retaining edge.

[0014] The present invention further provides that: the end of the first rib is embedded in the boss and forms a first reinforcing rib, and the end of the second rib is embedded in the outer ring and forms a second reinforcing rib.

[0015] The advantages of adopting the above technical solution are as follows: the first reinforcing rib in the above technology is provided to improve the connection strength between the first flange and the boss, thereby preventing the first flange from being damaged or falling out due to excessive load, and the second reinforcing rib is provided to improve the connection strength between the second flange and the outer ring, thereby preventing the second flange from being damaged or falling out due to excessive load.

[0016] The present invention is further provided that: a limiting groove is circumferentially provided on the inner circumferential wall of the retaining ring, a matching groove is circumferentially provided on the outer circumferential wall of the outer ring corresponding to the position of the limiting groove, the second limiting structure includes a limiting edge circumferentially provided in the matching groove, the inner side wall of the limiting groove is connected to the inner circumferential wall of the retaining ring by a smooth curved surface and an inclined surface is formed, the limiting edge is partially inserted into the limiting groove and is provided in contact with the inclined surface.

[0017] The benefit of adopting the above technical solution is that the limiting edge and the limiting groove in the above technology are inserted and arranged to improve the connection strength between the retaining ring and the outer ring, thereby avoiding separation of the retaining ring and the outer ring and causing bearing failure.

[0018] The present invention further provides that: the limiting edge is made of shape memory alloy material, the limiting edge has a fifth form in the first temperature range, the limiting edge has a sixth form in the second temperature range, the limiting edge is deformed and swings toward the limiting groove in the fifth form and is arranged in contact with the inclined surface, and the limiting edge is reset and retracted to the matching groove in the sixth form.

[0019] The benefits of adopting the above technical solution are: in the above technology, when the bearing is running, the limit edge is in the first temperature range, at which time the limit edge swings toward the limit groove and is set in contact with the inclined surface, thereby improving the limiting strength of the retaining ring, thereby avoiding the phenomenon of separation of the retaining ring and the outer ring of the bearing when the bearing is running and the retaining ring is subjected to high external loads, thereby improving the assembly strength between the retaining ring and the outer ring; when the bearing stops running or is not running, the limit edge is in the second temperature range, at which time the limit edge retracts into the mating groove, that is, the limit edge is separated from the limit groove, thereby facilitating the assembly and disassembly of the retaining ring and the bearing.

[0020] The present invention further provides that: the end of the limiting edge is embedded in the outer ring and forms a third reinforcing rib.

[0021] The advantages of adopting the above technical solution are as follows: the third reinforcing rib is provided in the above technology to improve the connection strength between the limiting edge and the outer ring, so as to prevent the limiting edge from being damaged or falling out due to excessive load.

[0022] The present invention further provides that: a step groove is formed between the outer peripheral wall of the outer ring and the containing groove, the inner peripheral wall of the step groove is connected by a smooth curved surface and forms a first chamfer, the inner peripheral wall of the retaining ring is connected by a smooth curved surface and forms a second chamfer with the right side wall of the retaining ring, and the first chamfer and the second chamfer are arranged opposite to each other.

[0023] The benefit of adopting the above technical solution is that the first chamfer and the second chamfer in the above technology are set to avoid the phenomenon of the snap ring being stuck or bumped due to too hard a fit when installing, that is, to improve the smoothness of the snap ring when installing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a partial cross-sectional view of the present invention in operation state;

[0025] Figure 2 for Figure 1 Partial enlarged view of part A in the middle;

[0026] Figure 3 for Figure 2 A simplified schematic cross-sectional view when not in operation;

[0027] Figure 4 for Figure 1 A partial enlarged view of part B in the middle;

[0028] Figure 5 for Figure 4 A simple schematic view when not running;

[0029] Figure 6 A partial three-dimensional view of the first rib and the second rib in the present invention in a matching state;

[0030] Figure 7 It is a partial simplified schematic view of the mating state of the first mating edge and the second mating edge in the present invention. DETAILED DESCRIPTION

[0031] The present invention provides a gearbox combined bearing, comprising an outer ring 1 and a retaining ring 11 which is sleeved on the outer ring 1 after being heated by a heating process, wherein a groove 12 is circumferentially provided on the outer peripheral wall of the outer ring 1, and a boss 2 is circumferentially provided on the inner peripheral wall of the retaining ring 11 which is used to be close to the opening of the groove 12 after being heated by a heating process and to be pressed into the groove 12 by an external pressure device when the retaining ring 11 is cooled, a first limiting structure for limiting the boss 2 from escaping from the groove 12 is provided on the right side of the groove 12, and a second limiting structure for limiting the boss 2 from escaping from the groove 12 is provided on the left side of the groove 12, the first limiting structure comprises a rib group which is used to be deformed after being heated by a heating process and is inclined relative to the right side wall of the groove 12, and the rib group comprises a rib group which is circumferentially provided on the right side wall of the boss 2 The first rib 21 and the second rib 13 circumferentially arranged on the right side wall of the groove 12, the first rib 21 is relatively inclined to the right side wall of the groove 12, the second rib 13 is relatively inclined to the right side wall of the boss 2, the first rib 21 and the second rib 13 are relatively parallel to each other and the first rib 21 and the second rib 13 are gap-matched to form a matching gap, the first rib 21 and the second rib 13 are both made of shape memory alloy, the first rib 21 has a first form in a first temperature range, the first rib 21 has a second form in a second temperature range, the first rib 21 is deformed in the first form to swing toward the right side wall of the groove 12 and is relatively inclined to the right side wall of the groove 12, and the first rib 21 is in the second form The second rib 13 is reset in the state and is fitted with the right side wall of the boss 2, the second rib 13 has a third state in the first temperature range, the second rib 13 has a fourth state in the second temperature range, the second rib 13 is deformed in the third state and swings toward the right side wall of the boss 2 and is relatively inclined to the right side wall of the boss 2, the second rib 13 is reset in the fourth state and is fitted with the right side wall of the groove 12, a plurality of first matching edges 22 are evenly distributed on the outer peripheral wall of the first rib 21, a plurality of second matching edges 131 are evenly distributed on the outer peripheral wall of the second rib 13, a plurality of the first matching edges 22 correspond to a plurality of the second matching edges 131 one by one and are arranged in contact, and the first matching edges 22 and the second matching edges 131 are both arranged in a matching clearance. The radial cross-section of the first mating edge 22 and the radial cross-section of the second mating edge 131 are both arc-shaped. The first mating edge 22 and the second mating edge 131 both include a raised portion 132 and two end portions. The two end portions of the first mating edge 22 are respectively connected to the first rib 21, and the two end portions of the second mating edge 131 are respectively connected to the second rib 13. The raised portions 132 of the first mating edges 22 correspond to the raised portions 132 of the second mating edges 131 one by one and are staggered. The raised portions 132 of adjacent first mating edges 22 are gap-fitted with insertion gaps 221 for the raised portions 132 of adjacent second mating edges 131 to be inserted. The end of the first rib 21 is embedded in the boss 2 and a first reinforcing rib 23 is formed.The end of the second retaining edge 13 is embedded in the outer ring 1 and forms a second reinforcing rib 133. A limiting groove 111 is circumferentially provided on the inner circumferential wall of the clamping ring 11. A matching groove 3 is circumferentially provided on the outer circumferential wall of the outer ring 1 corresponding to the position of the limiting groove 111. The second limiting structure includes a limiting edge 31 circumferentially arranged in the matching groove 3. The inner side wall of the limiting groove 111 is connected to the inner circumferential wall of the clamping ring 11 in a smooth curved surface and an inclined surface 112 is formed. The limiting edge 31 is partially inserted into the limiting groove 111 and is arranged in contact with the inclined surface 112. The limiting edge 31 is made of shape memory alloy material. The limiting edge 31 has a fifth form in the first temperature range. The limiting edge 31 has a sixth form in the second temperature range. The limiting edge 31 is deformed and swings toward the limiting groove 111 in the fifth form and is in contact with the inclined surface 112. The limiting edge 31 is reset and retracted to the matching groove 3 in the sixth form. The end of the limiting edge 31 is embedded in the outer ring 1 and a third reinforcing rib 32 is formed. A step groove 4 is formed between the outer peripheral wall of the outer ring 1 and the receiving groove 12. The inner peripheral wall of the step groove 4 is connected in a smooth curved surface and formed with a first chamfer 41. The inner peripheral wall of the clasp 11 and the right side wall of the clasp 11 are connected in a smooth curved surface and formed with a second chamfer 14. The first chamfer 41 is arranged opposite to the second chamfer 14.

[0032] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A gearbox combined bearing, comprising an outer ring and a retaining ring which is sleeved on the outer ring after being heated by a heating process, characterized in that: A groove is circumferentially provided on the outer circumferential wall of the outer ring, and a boss is circumferentially provided on the inner circumferential wall of the retaining ring for being close to the opening of the groove after being heated by a heating process and pressed into the groove by an external pressure device when the retaining ring is cooled. A first limiting structure is provided on the right side of the groove for limiting the boss from escaping from the groove, and a second limiting structure is provided on the left side of the groove for limiting the boss from escaping from the groove. The first limiting structure includes a flange group which is deformed after being heated by a heating process and is inclined relative to the right side wall of the groove. The flange group includes a first flange circumferentially provided on the right side wall of the boss and a second flange circumferentially provided on the right side wall of the groove. The first flange is inclined relative to the right side wall of the groove, the second flange is inclined relative to the right side wall of the boss, and the first flange and the second flange are arranged parallel to each other. The first rib and the second rib are arranged in a clearance fit to form a fitting clearance, the first rib and the second rib are both made of shape memory alloy material, the first rib has a first form within a first temperature range, the first rib has a second form within a second temperature range, the first rib is deformed and swings toward the right side wall of the groove in the first form and is tilted relative to the right side wall of the groove, the first rib is reset in the second form and is fitted with the right side wall of the boss, the second rib has a third form within the first temperature range, the second rib has a fourth form within the second temperature range, the second rib is deformed and swings toward the right side wall of the boss in the third form and is tilted relative to the right side wall of the boss, the second rib is reset in the fourth form and is fitted with the right side wall of the groove.

2. A gearbox combined bearing according to claim 1, characterized in that: A plurality of first matching edges are evenly distributed circumferentially on the outer peripheral wall of the first retaining edge, and a plurality of second matching edges are evenly distributed circumferentially on the outer peripheral wall of the second retaining edge. The plurality of first matching edges correspond to the plurality of second matching edges one by one and are arranged in contact with each other, and the first matching edges and the second matching edges are both arranged in a matching gap.

3. A gearbox combined bearing according to claim 2, characterized in that: The radial cross-section of the first mating edge and the radial cross-section of the second mating edge are both arc-shaped, and the first mating edge and the second mating edge both include a raised portion and two end portions, the two end portions of the first mating edge are respectively connected to the first rib, and the two end portions of the second mating edge are respectively connected to the second rib, and the raised portions of several first mating edges correspond to the raised portions of several second mating edges one by one and are staggered, and the raised portions of adjacent first mating edges are gap-fitted with an insertion gap for the raised portions of adjacent second mating edges to be inserted.

4. A gearbox combined bearing according to claim 1, characterized in that: The end of the first rib is embedded in the boss and forms a first reinforcing rib, and the end of the second rib is embedded in the outer ring and forms a second reinforcing rib.

5. The gearbox combined bearing according to claim 1, characterized in that: A limiting groove is circumferentially provided on the inner circumferential wall of the retaining ring, and a matching groove is circumferentially provided on the outer circumferential wall of the outer ring corresponding to the position of the limiting groove. The second limiting structure includes a limiting edge circumferentially arranged in the matching groove, and the inner side wall of the limiting groove is connected to the inner circumferential wall of the retaining ring in a smooth curved surface and an inclined surface is formed. The limiting edge is partially inserted into the limiting groove and is arranged in contact with the inclined surface.

6. A gearbox combined bearing according to claim 5, characterized in that: The limiting edge is made of shape memory alloy, has a fifth form in the first temperature range, and has a sixth form in the second temperature range. In the fifth form, the limiting edge is deformed and swung toward the limiting groove and is contacted with the inclined surface. In the sixth form, the limiting edge is reset and retracted to the matching groove.

7. A gearbox combined bearing according to claim 5, characterized in that: The end of the limiting edge is embedded in the outer ring and forms a third reinforcing rib.

8. The gearbox combined bearing according to claim 1, characterized in that: A step groove is formed between the outer peripheral wall of the outer ring and the receiving groove, the inner peripheral wall of the step groove is connected with a smooth curved surface and forms a first chamfer, the inner peripheral wall of the retaining ring and the right side wall of the retaining ring are connected with a smooth curved surface and form a second chamfer, and the first chamfer and the second chamfer are arranged opposite to each other.

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