Unequal-length cylindrical roller bearing

Abstract

The utility model relates to an unequal-length cylindrical roller bearing, and relates to the technical field of roller bearings, the unequal-length cylindrical roller bearing comprises an outer ring, an inner ring, a first rolling body, a second rolling body and a check ring, the first rolling body and the second rolling body are both arranged between the outer ring and the inner ring, and the check ring is arranged between the first rolling body and the second rolling body. The inner ring is provided with a first rolling body and a second rolling body, the length of the first rolling body is larger than that of the second rolling body, the check ring is installed on the inner ring and limits the first rolling body and the second rolling body, the inner ring is further provided with a middle space ring, and the middle space ring is located between the first rolling body and the second rolling body. The bearing has the effect of prolonging the service life of the bearing under the condition of long-term single-side stress.

Description

Technical Field

[0001] This application relates to the technical field of roller bearings, and in particular to a cylindrical roller bearing with unequal lengths. Background Technology

[0002] Traditional cam turntable structures typically use worm gear transmission, which is usually used for high-precision adjustment.

[0003] To achieve low or even zero backlash in the indexing plate of the cam and increase transmission accuracy, a cam rotary table structure is currently available as follows: Figure 3 As shown, the device includes a worm gear 50 and a worm 60. Multiple roller bearings are evenly spaced along the circumference of the worm gear 50. The worm 60 has space for the roller bearings to pass through. The worm 60 has three regions, A, B, and C, distributed sequentially. When the roller follower is in the left support region A, the lower half of the right outer diameter surface of the roller follower is tangentially in contact with the worm surface. As the worm 60 rotates unidirectionally, causing the roller follower to gradually enter the middle region C from the left region A, the right roller follower rotates clockwise. When the roller follower enters the center of the middle region C, the outer diameter surface of the roller follower is tangentially separated from the worm surface, and the roller follower gradually stops rotating. As the roller follower continues to move, the roller... As the roller follower gradually moves from the center of the middle region C into the right region B, the outer diameter surface of the right side of the roller follower gradually moves away from the worm face from top to bottom, making tangential contact with the worm face. The lower part of the outer diameter surface of the left side of the roller follower makes tangential contact with the worm face. The roller follower rotates counterclockwise. During this process, in order to maintain the driving accuracy of the worm 60, the roller bearings located in regions A and B will contact the worm 60 and maintain a certain pressure. The contact points between the roller bearings and the worm 60 are all facing the side of region C. The roller bearings located in region C do not contact the worm 60, thereby clamping the worm 60 from both sides, effectively increasing the transmission accuracy and enabling the indexing plate of the cam to achieve a small backlash or even zero backlash.

[0004] However, during the operation of the aforementioned cam turntable structure, since the worm 60 itself needs to rotate and is a slotted cylindrical rod, when the roller bearing enters the slot of the worm 60, it actually enters the slot of the worm 60. However, when the roller bearing, which moves in a planar direction, enters the slot of the worm 60, it will initially adhere to the worm 60 on one side while the other side has not yet entered the worm 60. Then, as the roller bearing continues to move in the plane, it will completely adhere to the worm 60. Finally, in the stage where the roller bearing disengages from the worm 60, it will again adhere to the worm 60 on one side while disengaging from the worm 60 on the other side. During this process, the roller bearing is often subjected to force on one side. If a traditional roller bearing structure is used, uneven force can easily occur, leading to damage to the roller bearing. Utility Model Content

[0005] In order to increase the service life of roller bearings under long-term unilateral stress, this application provides an unequal-length cylindrical roller bearing.

[0006] This application provides a cylindrical roller bearing with unequal lengths, employing the following technical solution:

[0007] A cylindrical roller bearing of unequal length includes an outer ring, an inner ring, a first rolling element, a second rolling element, and a retaining ring. The first rolling element and the second rolling element are both disposed between the outer ring and the inner ring, and the length of the first rolling element is greater than the length of the second rolling element. The retaining ring is mounted on the inner ring and limits the first rolling element and the second rolling element. A spacer ring is also mounted on the inner ring and is located between the first rolling element and the second rolling element.

[0008] By adopting the above technical solution, and by setting the first rolling element and the second rolling element, the length of the first rolling element is greater than the length of the second rolling element, thus forming a roller bearing with rollers of unequal length. Due to the increase in the length of the roller on one side, the load-bearing capacity of the rolling element in the longer column is improved, thereby effectively improving the life of the roller bearing under long-term unilateral stress.

[0009] Preferably, a dust cover is also installed on the retaining ring, which covers the first rolling element and the second rolling element.

[0010] By adopting the above technical solution, the dust cover covers and seals the first and second rolling elements, ensuring the sealing performance of the roller bearing and extending its service life.

[0011] Preferably, both the first rolling element and the second rolling element are cylindrical rollers.

[0012] By adopting the above technical solution and setting cylindrical rollers, rolling friction between the inner blocking component and the outer ring is achieved.

[0013] Preferably, the inner ring has a first oil injection hole.

[0014] By adopting the above technical solution, the user can lubricate the bearing through the first oil injection hole, making it convenient to use.

[0015] Preferably, a flange mandrel is mounted on the inner ring, and the flange mandrel has bolt holes for easy installation.

[0016] By adopting the above technical solution and setting bolt holes, it is convenient to install and connect the flange mandrel to the external turntable.

[0017] Preferably, the flange mandrel is provided with a second oil injection hole.

[0018] By adopting the above technical solution, the user can add oil to the bearing through the second oil injection hole, which is convenient for use.

[0019] Preferably, the flange mandrel has a positioning edge formed on it for positioning the flange mandrel in its installation position.

[0020] By adopting the above technical solution and setting the positioning edge, it is easy to determine the installation position of the flange mandrel and the inner ring, and to ensure the position of the outer ring on the flange mandrel. On the other hand, it is also easy to determine the position of the second oil injection hole, so as to ensure that the bearing can be stably oiled.

[0021] Preferably, the outer ring has an overrun groove.

[0022] By adopting the above technical solution and setting the overrun groove, the machining accuracy of the raceway of the roller bearing product can be improved, the grinding wheel consumption during raceway grinding can be reduced, and the friction and wear between the cylindrical rollers and the inner and outer ring raceways during the use of the support roller bearing can be effectively reduced.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By using first and second rolling elements of unequal length, a roller bearing with rollers of unequal length is formed. Since the roller bearing is subjected to unilateral force for a long time, increasing the length of one side of the roller increases the load-bearing capacity of the extended rolling elements, thereby effectively improving the life of the roller bearing under long-term unilateral force.

[0025] 2. By setting the overrun groove, the wear between the first rolling element, the second rolling element, and the outer ring can be effectively reduced; Attached Figure Description

[0026] Figure 1 This is a cross-sectional schematic diagram that mainly illustrates the overall structure in the embodiments of this application;

[0027] Figure 2 This is a cross-sectional schematic diagram mainly illustrating the flange mandrel structure in the embodiments of this application;

[0028] Figure 3 This is a schematic diagram illustrating the main structure of the turntable in the background technology of this application.

[0029] Reference numerals: 1. Outer ring; 2. Inner ring; 3. First rolling element; 4. Second rolling element; 5. Retaining ring; 6. Spacer ring; 7. Dust cover; 8. First oil filling hole; 9. Flange mandrel; 10. Bolt hole; 20. Second oil filling hole; 30. Positioning edge; 40. Overrun groove; 50. Worm gear; 60. Worm. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 2 This application will be described in further detail.

[0031] This application discloses an unequal-length cylindrical roller bearing.

[0032] Example 1:

[0033] like Figure 1 As shown, an unequal-length cylindrical roller bearing includes an outer ring 1, an inner ring 2, a first rolling element 3, a second rolling element 4, and a retaining ring 5. The first rolling element 3 and the second rolling element 4 are both cylindrical rollers. The radii of the first rolling element 3 and the second rolling element 4 are equal, and the length of the first rolling element 3 is greater than the length of the second rolling element 4. The first rolling element 3 and the second rolling element 4 are mounted in the space between the inner ring 2 and the outer ring 1. Multiple first rolling elements 3 and multiple second rolling elements 4 are provided, and the number of first rolling elements 3 and the number of second rolling elements 4 are equal. A first rolling element 3 and a second rolling element 4 are arranged side by side, and a spacer ring 6 is provided between the first rolling element 3 and the second rolling element 4. The spacer ring 6 is sleeved on the inner ring 2 to separate the first rolling element 3 and the second rolling element 4. A retaining ring 5 is installed on the inner ring 2 to limit the first rolling element 3 and the second rolling element 4 between the outer ring 1 and the inner ring 2. Retaining rings 5 ​​are installed on both sides of the inner ring 2, and the distance between the two retaining rings 5 ​​is just enough to install one first rolling element 3, one second rolling element 4, and one spacer ring 6.

[0034] like Figure 1 As shown, a dust cover 7 is also installed on the retaining ring 5. The dust cover 7 covers the first rolling element 3 and the second rolling element 4, thus sealing the bearing. The inner ring 2 has a first oil injection hole 8, and the outer ring 1 has a runout groove 40. In use, the user can inject oil into the bearing through the first oil injection hole 8, which lubricates the inside of the bearing as it runs.

[0035] The implementation principle of Embodiment 1 of this application is as follows: When put into actual use, the length of the first rolling element 3 inside the bearing is greater than the length of the second rolling element 4, forming a roller bearing with rollers of unequal length. As the length of the roller on one side inside the bearing increases, the load-bearing capacity of the first rolling element 3 in this row with increased length will be improved, thereby effectively improving the life of the roller bearing under long-term unilateral force.

[0036] Example 2:

[0037] The difference between this embodiment and Embodiment 1 is as follows: Figure 2 As shown, in this embodiment, a flange mandrel 9 is snapped and fixed inside the inner ring 2. A positioning edge 30 is integrally formed on the flange mandrel 9 for positioning the installation position of the flange mandrel 9. When the flange mandrel 9 is installed on the inner ring 2, the positioning edge 30 needs to fit against the retaining ring 5, thereby limiting the installation position of the flange mandrel 9 and the inner ring 2 and ensuring the installation position.

[0038] like Figure 2 As shown, the flange mandrel 9 has a second oil injection hole 20. Due to the presence of the positioning edge 30, after the flange mandrel 9 and the inner ring 2 are installed, the first oil injection hole 8 and the second oil injection hole 20 will be aligned, making the first oil injection hole 8 and the second oil injection hole 20 connected. This allows the user to inject oil through the second oil injection hole 20 toward the first oil injection hole 8, ensuring the normal oiling of the bearing. The flange mandrel 9 also has bolt holes 10 to facilitate the installation of the flange mandrel 9 on the turntable, which facilitates the positioning and installation of the flange mandrel 9 on the turntable.

[0039] The implementation principle of Embodiment 2 of this application is as follows: When put into actual use, the user can load the flange mandrel 9 into the installation position of the turntable and fix the flange mandrel 9 through the mounting holes and bolts. During loading, the operator must ensure that the first rolling element 3 corresponds to the side with a longer bearing time, thereby effectively improving the life of the roller bearing under long-term unilateral force.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cylindrical roller bearing with unequal lengths, characterized in that: The device includes an outer ring (1), an inner ring (2), a first rolling element (3), a second rolling element (4), and a retaining ring (5). The first rolling element (3) and the second rolling element (4) are both disposed between the outer ring (1) and the inner ring (2), and the length of the first rolling element (3) is greater than the length of the second rolling element (4). The retaining ring (5) is installed on the inner ring (2) and limits the first rolling element (3) and the second rolling element (4). A spacer ring (6) is also installed on the inner ring (2) and is located between the first rolling element (3) and the second rolling element (4).

2. The unequal-length cylindrical roller bearing according to claim 1, characterized in that: The retaining ring (5) is also equipped with a dust cover (7), which covers the first rolling body (3) and the second rolling body (4).

3. The unequal-length cylindrical roller bearing according to claim 1, characterized in that: Both the first rolling element (3) and the second rolling element (4) are cylindrical rollers.

4. The unequal-length cylindrical roller bearing according to claim 1, characterized in that: The inner ring (2) is provided with a first oil injection hole (8).

5. The unequal-length cylindrical roller bearing according to claim 1, characterized in that: A flange mandrel (9) is installed on the inner ring (2), and bolt holes (10) are provided on the flange mandrel (9) for easy installation.

6. The unequal-length cylindrical roller bearing according to claim 5, characterized in that: The flange mandrel (9) is provided with a second oil injection hole (20).

7. A cylindrical roller bearing of unequal length according to claim 6, characterized in that: The flange mandrel (9) has a positioning edge (30) formed on it for positioning the flange mandrel (9) in the installation position.

8. A cylindrical roller bearing of unequal length according to claim 1, characterized in that: The outer ring (1) is provided with an overrun groove (40).

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