Heavy-load cylindrical roller combined roller bearing

Abstract

The utility model discloses a heavy-load cylindrical roller combined roller bearing which comprises a bearing outer ring, a bearing inner ring, a rolling body, a thrust washer, a thrust roller assembly, a check ring and a sealing cover, an annular roller path is formed in the center of the bearing outer ring and the center of the bearing inner ring in the circumferential direction, and sinking table grooves are formed in the two sides of the annular roller path respectively; the bearing inner ring is sleeved with the bearing outer ring, the width of the bearing inner ring is larger than that of the annular roller path, and an annular mounting groove is formed between the periphery of the bearing inner ring and the sinking table groove; the rolling bodies are correspondingly clamped in the raceway between the annular raceway and the bearing inner ring; the thrust washers are correspondingly attached to the inner walls of the sinking table grooves respectively, the thrust roller assemblies are correspondingly attached to the outer sides of the thrust washers respectively, the check rings are correspondingly clamped to the outer sides of the thrust roller assemblies, and the sealing covers are correspondingly buckled between the bearing outer rings and the check rings. The grinding area of two side end faces of the bearing retainer ring can be reduced, the machining difficulty of the retainer ring is reduced, and the strength and the service life of a transmission shaft system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of roller bearings, in particular to a heavy-loaded cylindrical roller combined roller bearing. Background Art

[0002] A stacker crane is a specialized crane used for transporting, stacking, and placing goods from shelves in warehouses. It utilizes I-beam floor guides to guide the crane trolley and prevent it from tipping over. With the development of computer-controlled technology and automated warehouses, the use of stackers has become increasingly widespread. In stackers, roller bearings primarily serve as the support between the crane base and the rails, guiding the crane's movement along the rails. During operation, the bearings are subject to radial forces caused by the equipment's tendency to sway left and right, as well as axial forces caused by its tendency to tip over. Consequently, recent developments in roller bearings for stacker cranes have typically employed a combination of cylindrical roller bearings and thrust roller bearings. These bearings require grinding the outer ring end face, which serves as the thrust bearing raceway. However, for heavy-duty lifting equipment with high loads, the roller bearings used often have larger diameters and thicker ring walls, requiring a larger outer ring end face for machining. This results in low machining efficiency and difficulty ensuring quality even on large surfaces.

[0003] Furthermore, because bearings are often exposed to the elements as guide wheels in stacking and lifting equipment, the harsh working environment places high demands on the lubrication of the bearings, requiring regular grease filling. Oil holes and grooves specifically designed for grease filling are machined into the transmission shafting of the lifting equipment. These, in conjunction with the oil holes on the bearing inner ring, form a complete channel for grease filling within the bearings. However, these grooves machined into the transmission shaft are often the weak link in the shafting, directly reducing its load-bearing capacity and lifespan. Utility Model Content

[0004] Technical problem solved: In response to the problems existing in the prior art, the utility model provides a heavy-duty cylindrical roller combined roller bearing, which can reduce the grinding area of ​​the end faces on both sides of the bearing retaining ring, reduce the processing difficulty of the retaining ring, and is conducive to improving the processing accuracy of the retaining ring end face, which is conducive to improving the strength and life of the transmission shaft system.

[0005] Technical solution: The utility model relates to a heavy-duty cylindrical roller combined roller bearing, the roller bearing comprising:

[0006] A bearing outer ring, wherein an annular raceway is provided in the central circumferential direction of the inner ring of the bearing outer ring, and the inner ring is provided with a sinking groove on both sides of the annular raceway, wherein the diameter of the sinking groove is larger than the diameter of the annular raceway;

[0007] The inner ring of the bearing is coaxially sleeved on the outer ring of the bearing with the annular raceway; the width of the inner ring of the bearing is greater than the width of the annular raceway, and an annular mounting groove is formed between the outer periphery of the inner ring of the bearing and the sink groove;

[0008] Rolling elements, which are correspondingly mounted in the raceway between the annular raceway and the inner ring of the bearing and can rotate freely along the annular raceway;

[0009] Among them, the thrust washer, thrust roller assembly, retaining ring and sealing cover each include two groups, the thrust washers are respectively and correspondingly arranged on the inner wall of the sink groove, the thrust roller assemblies are respectively and correspondingly arranged in the sink groove and located on the outside of the thrust washer; the retaining ring is correspondingly clamped on the outside of the thrust roller assembly; the sealing cover is correspondingly buckled between the outer ring of the bearing and the retaining ring.

[0010] Preferably, the outer side of the outer periphery of the retaining ring is recessed inward to form a clamping step, and the inner side surface of the clamping step forms a supporting inclined surface.

[0011] Preferably, a process groove with a depth not exceeding 0.5 mm is processed at a position in the middle of the end faces on both sides of the retaining ring that does not contact the thrust roller assembly and the inner ring of the bearing.

[0012] Preferably, the sealing cover includes a support ring body adapted to the inner diameter of the sink groove, and a side retaining ring is provided on the outside of the support ring body. The support ring body and the side retaining ring are in an "L"-shaped cross-sectional structure, and the side retaining ring is correspondingly pressed against the outside of the support slope.

[0013] Preferably, the rolling elements are double-row rolling elements, which are cylindrical rollers.

[0014] Preferably, the inner diameter of the thrust washer is smaller than that of the annular raceway and larger than that of the bearing inner ring, so that the rolling element is confined between the two thrust washers.

[0015] Preferably, the thrust roller assembly includes a roller retainer correspondingly mounted in the annular mounting groove, and the roller retainer is circumferentially provided with a plurality of thrust rollers.

[0016] Preferably, a closed annular oil storage ring groove is opened in the annular raceway of the outer ring of the bearing, and the oil storage ring groove is located in the axial center of the annular raceway; an oil injection guide groove with an annular structure is provided in the center of the inner side wall of the inner ring of the bearing, and the oil injection guide groove is provided with multiple oil injection holes in the circumferential direction; the oil injection guide groove is arranged corresponding to the position of the oil storage ring groove.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. The bearing retaining ring of the utility model has a groove in the middle part that does not contact the bearing inner ring and the thrust roller, which can reduce the grinding area of ​​the end faces on both sides of the bearing retaining ring, reduce the processing difficulty of the retaining ring, and help improve the processing accuracy of the retaining ring end faces.

[0019] 2. An oil filling guide groove is machined in the middle of the inner wall surface of the inner ring of the bearing, which can facilitate the filling of grease into the bearing. In addition, the roller bearing with this structure can eliminate the oil groove on the matching transmission shaft, which is beneficial to improve the strength and life of the transmission shaft system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of the axial structure of the roller bearing of the present utility model;

[0021] Figure 2 for Figure 1 Axial structural section view of the outer ring of the middle bearing;

[0022] Figure 3 for Figure 1 Axial structural section view of the inner ring of the middle bearing;

[0023] Figure 4 for Figure 1 Schematic diagram of the rolling element structure;

[0024] Figure 5 for Figure 1 Axial structural cross-sectional view of the middle thrust washer;

[0025] Figure 6 for Figure 1 Axial structural cross-sectional view of the thrust roller assembly;

[0026] Figure 7 for Figure 1 Axial structural cross-sectional view of the middle retaining ring;

[0027] Figure 8 for Figure 1 Axial structural cross-sectional view of the middle sealing cover.

[0028] Figure numerals: 100, roller bearing; 1, bearing outer ring; 11, annular raceway; 12, sink groove; 13, oil storage ring groove; 2, bearing inner ring; 21, oil filling guide groove; 22, oil filling hole; 3, rolling element; 4, thrust washer; 5, thrust roller assembly; 51, roller retainer; 52, thrust roller; 6, retaining ring; 61, clamping step; 62, supporting slope; 63, process groove; 7, sealing cover; 71, support ring body; 72, side retaining ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following Figures 1 to 8The technical solutions of the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0030] like Figures 1 to 4 As shown, the present invention discloses a heavy-duty cylindrical roller assembly bearing. The roller bearing 100 comprises an outer ring 1, an inner ring 2, rolling elements 3, a thrust washer 4, a thrust roller assembly 5, a retaining ring 6, and a sealing cover 7. An annular raceway 11 is defined circumferentially within the inner ring of the outer ring 1. The inner ring also has recessed grooves 12 on either side of the annular raceway 11. The recessed grooves 12 have a diameter greater than that of the annular raceway 11. The inner ring 2 and the annular raceway 11 are coaxially mounted within the outer ring 1. The width of the inner ring 2 is greater than that of the annular raceway 11, and an annular mounting groove is formed between the outer circumference of the inner ring 2 and the recessed grooves 12. The rolling elements 3 are mounted in the raceway between the annular raceway 11 and the inner ring 2 and can rotate freely along the annular raceway 11. The rolling elements 3 are double-row cylindrical rollers. The thrust washers 4, thrust roller assemblies 5, and sealing covers 7 each comprise two sets. The thrust washers 4 are fitted against the inner wall of the recessed groove 12, and the thrust roller assemblies 5 are fitted within the recessed groove 12 and outside the thrust washers 4. The retaining rings 6 are fitted onto the outside of the thrust roller assemblies 5. The sealing covers 7 are fitted between the bearing outer ring 1 and the retaining rings 6. This roller bearing has high structural strength and support capacity, as well as excellent sealing performance.

[0031] like Figures 7 and 8 As shown, the outer periphery of retaining ring 6 is recessed inward to form a mounting step 61, and the inner side of mounting step 61 forms a support slope 62. Sealing cover 7 includes a support ring body 71 adapted to the inner diameter of recessed groove 12. Side retaining rings 72 are disposed on the outer side of support ring body 71. The support ring body 71 and side retaining rings 72 form an "L"-shaped cross-section, and side retaining rings 72 are pressed against the outer side of support slope 62. The sealing cover is press-fitted into the recessed groove 12 of the bearing outer ring using an interference fit, ensuring a tight installation and preventing the bearing from loosening or falling off during prolonged use.

[0032] like Figure 7 As shown, a process groove 63 with a depth of no more than 0.5 mm is machined in the middle of the end surfaces of both sides of the retaining ring 6 at a location that does not contact the thrust roller 52 assembly and the bearing inner ring. The presence of the process groove 63 in the middle of the bearing retaining ring, where the location does not contact the bearing inner ring and the thrust roller 52, can reduce the grinding area of ​​the end surfaces of the bearing retaining ring, reduce the machining difficulty of the retaining ring, and help improve the machining accuracy of the retaining ring end surfaces.

[0033] like Figure 1 and Figure 5 As shown, the inner diameter of the thrust washer 4 is smaller than the annular raceway 11 and larger than the bearing inner ring 2, which restricts the rolling element 3 between the two thrust washers 4 and effectively prevents the rolling element 3 from moving along the axial direction of the roller bearing.

[0034] like Figure 6 As shown, the thrust roller assembly 5 includes a roller cage 51 correspondingly mounted in an annular mounting groove, and a plurality of thrust rollers 52 are correspondingly arranged in the circumferential direction of the roller cage 51. The thrust roller 52 assembly can improve the ability of the roller bearing to carry axial loads.

[0035] like Figures 1-3 As shown, the annular raceway of the bearing outer ring 1 includes a closed annular oil reservoir groove 13 located axially in the center of the annular raceway 11. An annular oil guide groove 21 is centrally located on the inner sidewall of the bearing inner ring 2, and multiple oil holes 22 are circumferentially defined therein. The oil guide groove 21 corresponds to the oil reservoir groove. The central portion of the inner wall of the bearing inner ring facilitates grease filling within the bearing. Roller bearings employing this structure eliminate the need for an oil groove on the corresponding drive shaft, improving the strength and life of the drive shaft system.

[0036] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A heavy-loaded cylindrical roller combined roller bearing, characterized in that: The roller bearing (100) comprises: A bearing outer ring (1), wherein an annular raceway (11) is provided in the central circumferential direction of the inner ring of the bearing outer ring (1), and the inner ring is provided with a sinking groove (12) on both sides of the annular raceway (11), wherein the diameter of the sinking groove (12) is larger than the diameter of the annular raceway (11); A bearing inner ring (2), wherein the bearing inner ring (2) and the annular raceway (11) are coaxially sleeved in the bearing outer ring (1); the width of the bearing inner ring (2) is greater than the width of the annular raceway (11), and an annular mounting groove is formed between the outer periphery of the bearing inner ring (2) and the sinking groove (12); A rolling body (3), wherein the rolling body (3) is correspondingly mounted in the raceway between the annular raceway (11) and the bearing inner ring (2), and can rotate freely along the annular raceway (11); The thrust washer (4), the thrust roller assembly (5), the retaining ring (6) and the sealing cover (7) each comprise two groups, the thrust washer (4) being respectively and correspondingly arranged on the inner wall of the sinking groove (12), the thrust roller assembly (5) being respectively and correspondingly arranged in the sinking groove (12) and being located outside the thrust washer (4); the retaining ring (6) being correspondingly mounted on the outside of the thrust roller assembly (5); and the sealing cover (7) being correspondingly engaged between the bearing outer ring (1) and the retaining ring (6).

2. The heavy-loaded cylindrical roller combined roller bearing according to claim 1, characterized in that: The outer side of the outer periphery of the retaining ring (6) is recessed inward to form a clamping step (61), and the inner side surface of the clamping step (61) forms a supporting inclined surface (62).

3. The heavy-loaded cylindrical roller combined roller bearing according to claim 2, characterized in that: A process groove (63) with a depth not exceeding 0.5 mm is machined at a position in the middle of the end faces on both sides of the retaining ring (6) that does not contact the thrust roller (52) assembly and the bearing inner ring.

4. The heavy-loaded cylindrical roller combined roller bearing according to claim 2, characterized in that: The sealing cover (7) comprises a support ring body (71) adapted to the inner diameter of the sink groove (12), a side retaining ring (72) is provided on the outside of the support ring body (71), the support ring body (71) and the side retaining ring (72) present an "L"-shaped cross-sectional structure, and the side retaining ring (72) is correspondingly pressed against the outside of the support inclined surface (62).

5. The heavy-loaded cylindrical roller combined roller bearing according to any one of claims 1 to 4, characterized in that: The rolling bodies (3) are double-row rolling bodies (3), which are cylindrical rollers.

6. The heavy-loaded cylindrical roller combined roller bearing according to claim 5, characterized in that: The inner diameter of the thrust washer (4) is smaller than the annular raceway (11) and larger than the bearing inner ring (2), so that the rolling element (3) is confined between the two thrust washers (4).

7. The heavy-loaded cylindrical roller combined roller bearing according to claim 5, characterized in that: The thrust roller assembly (5) comprises a roller retainer (51) correspondingly mounted in an annular mounting groove, and the roller retainer (51) is provided with a plurality of thrust rollers (52) correspondingly arranged in a circumferential direction.

8. The heavy-loaded cylindrical roller combined roller bearing according to claim 5, characterized in that: A closed annular oil storage ring groove (13) is provided in the annular raceway of the bearing outer ring (1), and the oil storage ring groove (13) is located in the axial center of the annular raceway (11); an annular oil injection guide groove (21) is provided in the center of the inner side wall of the bearing inner ring (2), and the oil injection guide groove (21) is provided with a plurality of oil injection holes (22) in the circumferential direction; the oil injection guide groove (21) is provided in a position corresponding to the oil storage ring groove.

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