Single-row tapered roller combination bearing

By combining two tapered rollers into one tapered roller combination, the problem of roller inclination of super-large tapered roller bearings during equipment operation is solved, the bearing capacity is improved, and the equipment is operated normally.

CN223076015UActive Publication Date: 2025-07-08DALIAN METALLURGICAL BEARING
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Patent Information

Application Number
CN202421455115.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-25
Publication Date
2025-07-08
Estimated Expiration
2034-06-25

AI Technical Summary

Technical Problem

Existing extra-large tapered roller bearings are prone to inclination due to dust entering during the operation of the equipment, which affects the normal use of the equipment and lacks load-bearing capacity.

Method used

A single-row tapered roller combination bearing is designed. By combining two tapered rollers into a tapered roller combination, the reference surface is processed and the gap between the roller and the inner diameter and the inclination of the pillar are calculated to ensure proper assembly and uniform welding, and to improve load bearing capacity.

Benefits of technology

It effectively avoids roller tilt, improves the bearing capacity and ensures the normal operation of the equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a single-row tapered roller combination bearing. The single-row tapered roller combination bearing comprises an inner ring, a tapered roller combination, a retainer and an outer ring, the tapered roller combination is installed between the inner ring outer diameter raceway and the outer ring inner diameter raceway, the retainer comprises a retainer seat, a retainer cover and a plurality of supporting columns, through holes which extend and are distributed along the center line of the tapered roller combination are formed in the tapered roller combination, the through holes are matched with the supporting columns, and the supporting columns sequentially penetrate through the retainer seat, the tapered roller combination and the retainer cover; through processing and calculation of two reference surfaces on the outer diameters of the two rollers, whether gaps between the inner diameters of the rollers and the outer diameters of the supporting columns and roller combination are proper or not and whether welding generates inclination to the supporting columns or not are measured in bearing assembly, so that the bearing capacity of the tapered roller combination structure is relatively high; inclination and other conditions are not prone to occurring to affect normal use of equipment.
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Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and particularly relates to a single-row tapered roller combined bearing. Background Art

[0002] In the past, most extra-large tapered roller bearings adopted a structure composed of a strut cage, an inner sleeve, hollow rollers, and an outer sleeve. This structure has a relatively high load-bearing capacity. However, due to the long and slender rollers and a 1.5-mm design gap between the inner diameter of the rollers and the outer diameter of the struts, during the operation of the equipment, if the equipment seal is not good and dust or other objects enter, the first affected parts are the rollers. Moreover, the rollers are prone to tilting and other phenomena, which affect the normal use of the equipment. Summary of the Utility Model

[0003] In view of the above problems, the purpose of this application is to provide a single-row tapered roller combined bearing, which can realize that two tapered rollers form a tapered roller combination. By machining and calculating two reference surfaces on the outer diameters of the two component rollers, during the assembly of the bearing, the clearances between the rollers and the inner diameter and the outer diameter of the struts can be measured, and whether the roller combination is suitable, and whether the welding causes the struts to have an inclination can be determined. In this way, the tapered roller combination structure has a relatively high load-bearing capacity and is not prone to tilting and other situations that affect the normal use of the equipment.

[0004] To achieve some or all of the above purposes or other purposes, the present application provides the following technical solution: A single-row tapered roller combined bearing includes an inner ring, a tapered roller combination, a cage, and an outer ring; the tapered roller combination is installed between the outer diameter raceway of the inner ring and the inner diameter raceway of the outer ring; the cage includes a cage seat, a cage cover, and a number of struts; the number of the tapered roller combinations is the same as the number of struts; the tapered roller combination is provided with through holes extending along its center line, and the through holes are matched with the struts; the cage seat is provided with threaded holes, and the threaded holes are matched with the struts; the cage cover is provided with straight holes, and the straight holes are matched with the struts; the struts sequentially pass through the cage seat, the tapered roller combination, and the cage cover.

[0005] Further, the tapered roller combination includes a first tapered roller and a second tapered roller; the first tapered roller and the second tapered roller are connected in series on the struts of the cage, and the small end face of the first tapered roller is in contact with the large end face of the second tapered roller.

[0006] Further, an annular groove is provided on the circumferential surface of the strut of the cage. The circumferential surface of the strut is in contact with the surface of the through hole of the first tapered roller, and the circumferential surface of the strut is in contact with the surface of the through hole of the second tapered roller. The small end face of the first tapered roller is in contact with the large end face of the second tapered roller. The annular groove is located at the intersection of the three contact surfaces.

[0007] Furthermore, the height of the first tapered roller is equal to that of the second tapered roller; the diameter of the small end face of the first tapered roller is equal to the diameter of the large end face of the second tapered roller; the contact angle of the first tapered roller is equal to the contact angle of the second tapered roller.

[0008] Furthermore, the height of the first tapered roller is 100 mm, and the height of the second tapered roller is 100 mm; the diameter of the large end face of the first tapered roller is 50 mm, the diameter of the small end face of the first tapered roller is 41.666 mm, the diameter of the large end face of the second tapered roller is 41.666 mm, and the diameter of the small end face of the second tapered roller is 33.333 mm; the contact angle of the first tapered roller is 30°, and the contact angle of the second tapered roller is 30°.

[0009] Furthermore, it further includes a positioning rod; a positioning through hole a is provided every 90° on the cage cover, a positioning through hole b is provided every 90° on the cage seat, the positioning through hole a and the positioning through hole b are in corresponding positions, and the positioning through hole a, the positioning through hole b and the positioning rod are matched with each other.

[0010] Furthermore, threads are provided inside the positioning through hole a and the positioning through hole b, and the positioning rod is a threaded rod that is matched with the threads inside the positioning through hole a and the positioning through hole b.

[0011] Furthermore, a large rib is provided on one side of the outer diameter raceway of the inner ring close to the large end face of the inner ring, a small rib is provided on one side of the outer diameter raceway of the inner ring close to the small end face of the inner ring, the large rib contacts the large end face of the tapered roller assembly, and the small rib contacts the small end face of the tapered roller assembly.

[0012] Furthermore, the side of the straight hole far from the tapered roller assembly is set to be ramp-shaped.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: Two or more tapered rollers form a tapered roller assembly. During the bearing assembly, the clearance between the roller and the inner diameter and the outer diameter of the strut and whether the roller assembly is suitable are measured, and whether the welding causes inclination of the strut, so that the load-bearing capacity of the tapered roller assembly structure is relatively high, and it is not easy to tilt and other situations that affect the normal use of the equipment. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic diagram of the cage cover;

[0016] Figure 3 is a schematic diagram of A-A;

[0017] Figure 4 is a schematic diagram of the cage seat;

[0018] Figure 5 is a schematic diagram taken along line B-B;

[0019] In the figure: 1. inner ring; 2. cage seat; 3. cage cover; 4. first tapered roller; 5. second tapered roller; 6. outer ring; 7. through hole; 8. threaded hole; 9. straight hole; 10. annular groove; 11. pillar; 12. positioning through hole a; 13. positioning through hole b. Specific embodiments

[0020] To make the structure and function of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0021] See the attached Figures 1-5 , a single-row tapered roller combined bearing, comprising an inner ring 1, a tapered roller combination, a cage, and an outer ring 6; the tapered roller combination is installed between the outer diameter raceway of the inner ring 1 and the inner diameter raceway of the outer ring 6; the cage includes a cage seat 2, a cage cover 3, and a plurality of pillars 11; the number of the tapered roller combinations is the same as the number of the pillars 11; a through hole 7 extending along its center line is provided on the tapered roller combination, and the through hole 7 matches the pillar 11; a threaded hole 8 is provided on the cage seat 2, and the threaded hole 8 matches the pillar 11; a straight hole 9 is provided on the cage cover 3, and the straight hole 9 matches the pillar 11; the pillar 11 sequentially passes through the cage seat 2, the tapered roller combination, and the cage cover 3.

[0022] Further, the tapered roller combination includes a first tapered roller 4 and a second tapered roller 5; the first tapered roller 4 and the second tapered roller 5 are connected in series on the pillar 11 of the cage, and the small end face of the first tapered roller 4 contacts the large end face of the second tapered roller 5.

[0023] Further, an annular groove 10 is provided on the circumferential surface of the pillar 11 of the cage, the circumferential surface of the pillar 11 contacts the surface of the through hole 7 of the first tapered roller 4, the circumferential surface of the pillar 11 contacts the surface of the through hole 7 of the second tapered roller 5, and the small end face of the first tapered roller 4 contacts the large end face of the second tapered roller 5. The annular groove 10 is located at the intersection of the three contact surfaces; the rollers are processed separately and then assembled together, and the clearance with the pillar is matched, so that the contact position of the two rollers in the working process of the roller combination will not be affected by the pillar.

[0024] Further, the height of the first tapered roller 4 is equal to the height of the second tapered roller 5; the diameter of the small end face of the first tapered roller 4 is equal to the diameter of the large end face of the second tapered roller 5; the contact angle of the first tapered roller 4 is equal to the contact angle of the second tapered roller 5.

[0025] Further, the height of the first tapered roller 4 is 100 mm, and the height of the second tapered roller 5 is 100 mm; the diameter of the large end face of the first tapered roller 4 is 50 mm, the diameter of the small end face of the first tapered roller 4 is 41.666 mm, the diameter of the large end face of the second tapered roller 5 is 41.666 mm, and the diameter of the small end face of the second tapered roller 5 is 33.333 mm; the contact angle of the first tapered roller 4 is 30°, and the contact angle of the second tapered roller 5 is 30°.

[0026] Further, it further includes a positioning rod; a positioning through hole a12 is provided on the cage cover 3 at intervals of 90°, a positioning through hole b13 is provided on the cage seat 2 at intervals of 90°, the positions of the positioning through hole a12 and the positioning through hole b13 correspond to each other, and the positioning through hole a12, the positioning through hole b13 are matched with the positioning rod.

[0027] Further, threads are provided inside the positioning through hole a12 and the positioning through hole b13, and the positioning rod is a threaded rod that is matched with the threads inside the positioning through hole a12 and the positioning through hole b13.

[0028] Further, a large rib is provided on one side of the outer diameter raceway of the inner ring 1 close to the large end face of the inner ring 1, a small rib is provided on one side of the outer diameter raceway of the inner ring 1 close to the small end face of the inner ring 1, the large rib contacts the large end face of the tapered roller assembly, and the small rib contacts the small end face of the tapered roller assembly.

[0029] Further, the side of the straight hole 9 away from the tapered roller assembly is arranged in a slope shape, and the post-weld at the connection of the welding post 11 and the cage cover 3 does not protrude from the cage cover 3.

[0030] Further, it further includes a spacer, and the assembly method steps are as follows:

[0031] Step 1: Install the inner ring 1, with the large end face of the inner ring 1 placed flat on the ground;

[0032] Step 2: Install the cage seat 2, with the cage seat 2 sleeved outside the large rib of the inner ring 1;

[0033] Step 3: Install the tapered roller assembly. First, place the tapered roller assembly on the cage seat 2, and then push the tapered roller assembly into the outer diameter raceway of the inner ring 1;

[0034] Step 4: Install the post 11, pass the post 11 through the through hole 7 of the tapered roller assembly, and thread one end of the post 11 with the threaded hole 8 of the cage seat 2;

[0035] Step 5: Install the cage cover 3, and pass the other end of the post 11 through the straight hole 9 of the cage cover 3;

[0036] Step Six: Insert spacer plates. Insert spacer plates between the cage seat 2 and the tapered roller assembly, between the tapered roller assembly and the cage cover 3, and between the first tapered roller 4 and the second tapered roller 5; determine the distance between the cage seat 2 and the cage cover 3 by inserting the spacer plates to ensure the clearance between the assembled cage seat 2, the first tapered roller 4, the second tapered roller 5, and the cage cover 3, and improve the load-bearing capacity of the tapered roller assembly structure;

[0037] Step Seven: Fix and connect the cage cover 3 and the cage seat 2 through positioning rods. Each positioning rod passes through a corresponding positioning through-hole a12 and a positioning through-hole b13;

[0038] Step Eight: Remove the spacer plates;

[0039] Step Nine: Weld the connection between the support pillar 11 and the cage cover 3;

[0040] Step Ten: Remove the positioning rods;

[0041] Step Eleven: Install the outer ring 6. Fit the outer ring 6 over the outside of the tapered roller assembly.

[0042] Beneficial effects: Two tapered rollers are combined to form a tapered roller assembly. By machining and calculating two reference surfaces on the outer diameters of the two component rollers, the clearances between the rollers and the inner diameter and the outer diameter of the support pillar, as well as whether the roller assembly is appropriate, and whether the welding causes inclination of the support pillar can be measured during bearing assembly. In order to ensure the influence of the support pillar on the rollers, the current and other parameters must be calculated for welding, and symmetric point welding can ensure welding uniformity. After welding, the outer sleeve is pressed on the rollers and rotated after heat preservation, and whether the welding causes inclination of the support pillar. The load-bearing capacity of the tapered roller assembly structure is relatively high, and it is not easy to tilt and other situations that affect the normal use of the equipment.

Claims

1. A single-row tapered roller combined bearing, characterized in that: It includes an inner ring, a combination of tapered rollers, a cage, and an outer ring; the combination of tapered rollers is installed between the outer diameter raceway of the inner ring and the inner diameter raceway of the outer ring; the cage includes a cage seat, a cage cover, and several struts; the number of the combination of tapered rollers is the same as the number of struts; through holes extending along its center line are arranged on the combination of tapered rollers, and the through holes are matched with the struts; threaded holes are arranged on the cage seat, and the threaded holes are matched with the struts; straight holes are arranged on the cage cover, and the straight holes are matched with the struts; the struts sequentially pass through the cage seat, the combination of tapered rollers, and the cage cover.

2. The single-row tapered roller combined bearing according to claim 1, characterized in that: The combination of tapered rollers includes a first tapered roller and a second tapered roller; the first tapered roller and the second tapered roller are connected in series on the struts of the cage, and the small end face of the first tapered roller is in contact with the large end face of the second tapered roller.

3. A single-row tapered roller combined bearing according to claim 2, characterized in that: An annular groove is arranged on the peripheral surface of the strut of the cage. The peripheral surface of the strut is in contact with the surface of the through hole of the first tapered roller and the peripheral surface of the strut is in contact with the surface of the through hole of the second tapered roller. The small end face of the first tapered roller is in contact with the large end face of the second tapered roller. The annular groove is located at the intersection of the three contact surfaces.

4. A single-row tapered roller combined bearing according to claim 2, characterized in that: The height of the first tapered roller is equal to the height of the second tapered roller; the diameter of the small end face of the first tapered roller is equal to the diameter of the large end face of the second tapered roller; the contact angle of the first tapered roller is equal to the contact angle of the second tapered roller.

5. A single-row tapered roller combined bearing according to claim 2, characterized in that: The height of the first tapered roller is 100 mm, and the height of the second tapered roller is 100 mm; the diameter of the large end face of the first tapered roller is 50 mm, the diameter of the small end face of the first tapered roller is 41.666 mm, the diameter of the large end face of the second tapered roller is 41.666 mm, and the diameter of the small end face of the second tapered roller is 33.333 mm; the contact angle of the first tapered roller is 30°, and the contact angle of the second tapered roller is 30°.

6. The single-row tapered roller combined bearing according to claim 1, characterized in that: It further includes a positioning rod; a positioning through hole a is arranged on the cage cover every 90°, a positioning through hole b is arranged on the cage seat every 90°, the positioning through hole a and the positioning through hole b are in corresponding positions, and the positioning through hole a, the positioning through hole b are matched with the positioning rod.

7. The single-row tapered roller combined bearing according to claim 6, wherein: Threads are arranged inside the positioning through hole a and the positioning through hole b, and the positioning rod is a threaded rod matched with the threads inside the positioning through hole a and the positioning through hole b.

8. A single-row tapered roller combined bearing according to claim 1, characterized in that: A large rib is arranged on one side of the outer diameter raceway of the inner ring close to the large end face of the inner ring, a small rib is arranged on one side of the outer diameter raceway of the inner ring close to the small end face of the inner ring, the large rib is in contact with the large end face of the combination of tapered rollers, and the small rib is in contact with the small end face of the combination of tapered rollers.

9. A single-row tapered roller combined bearing according to claim 1, characterized in that: The side of the straight hole far from the combination of tapered rollers is arranged in a slope shape.