Double-row bearing and vibrating rod

Abstract

The utility model relates to a double-row bearing and a vibrating rod. The technical problem that an existing double-row bearing is unreasonable in design is solved. The double-row bearing comprises an outer ring and an inner ring which are coaxially arranged, wherein the outer ring and the inner ring are arranged at an interval, and a mounting cavity is formed between the outer ring and the inner ring; the spherical roller annular groove is annularly formed along the mounting cavity, a plurality of spherical rollers are arranged in the spherical roller annular groove, and the spherical roller retainer is arranged in the spherical roller annular groove and enables the spherical rollers to be circumferentially distributed; the cylindrical roller annular groove is formed in the annular direction of the mounting cavity, the cylindrical roller annular groove and the spherical roller annular groove are formed in a spaced mode, a plurality of cylindrical rollers are arranged in the cylindrical roller annular groove, and the cylindrical roller retainer is arranged in the cylindrical roller annular groove and enables the cylindrical rollers to be circumferentially distributed. According to the double-row bearing and the vibrating rod, the radial pressure bearing performance of the bearing is improved through the cylindrical rollers, meanwhile, the cylindrical rollers preferentially bear the radial force of the bearing to play a role in protecting the bearing, and the cylindrical rollers are matched with the spherical rollers to form the double-row bearing to supplement the axial stress performance.

Description

Technical Field

[0001] This utility model belongs to the field of double row bearings, and relates to a double row bearing and a vibrating rod. Background Technology

[0002] For example, Chinese patent document discloses a double-row bearing [201621284963.X], which includes an inner ring, a first outer ring and a second outer ring located side by side outside the inner ring. A first cage holds a number of steel balls between the first outer ring and the inner ring, and a second cage holds a number of rollers between the second outer ring and the inner ring. A connecting sleeve is also provided between the first cage and the second cage. The inner ring is provided with an inner ring slot that forms an insertion fit with the radial inner end of the connecting sleeve. A first insertion block and a second insertion block are respectively provided on both sides of the radial outer end of the connecting sleeve. A first slot that forms an insertion fit with the first insertion block is provided on the axial inner end face of the first cage, and a second slot that forms an insertion fit with the second insertion block is provided on the axial inner end face of the second cage.

[0003] The above technical solution has the following drawbacks: the radial force bearing effect of double row bearings is poor, and the installation position of the cylindrical rollers is prone to axial displacement, which can lead to misalignment of the inner and outer rings of the bearing. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a double-row bearing and a vibrating rod.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] The double-row bearing includes:

[0007] An outer ring and an inner ring are coaxially arranged, the outer ring and the inner ring are spaced apart and a mounting cavity is provided between them;

[0008] A spherical roller annular groove is provided circumferentially along the mounting cavity. A plurality of spherical rollers are provided in the spherical roller annular groove, and a spherical roller retainer is provided in the spherical roller annular groove to keep the spherical rollers circumferentially distributed.

[0009] A cylindrical roller annular groove is arranged circumferentially along the mounting cavity and spaced apart from the spherical roller annular groove. The cylindrical roller annular groove contains a plurality of cylindrical rollers, and a cylindrical roller cage is arranged in the cylindrical roller annular groove to keep the cylindrical rollers circumferentially distributed. The inner diameter of both the spherical roller annular groove and the cylindrical roller annular groove is larger than the inner diameter of the mounting cavity.

[0010] Furthermore, the inner diameter of the cylindrical roller annular groove is larger than the inner diameter of the spherical roller annular groove.

[0011] Furthermore, the inner wall of the outer ring and the outer wall of the inner ring are provided with corresponding arc-shaped notches, and the arc-shaped notches communicate with the mounting cavity to form a spherical roller annular groove, and the two sides of the spherical roller fit into the arc-shaped notches.

[0012] Furthermore, the inner wall of the outer ring away from the arc-shaped notch is provided with a corresponding enlarged hole notch, and the enlarged hole notch communicates with the mounting cavity to form a cylindrical roller annular groove, and the two sides of the cylindrical roller fit and adhere to the inner wall of the enlarged hole notch.

[0013] Furthermore, a step is provided at one end of the enlarged hole notch near the arc-shaped notch, and the cylindrical roller axially abuts against the step.

[0014] Furthermore, a clearance groove is provided at the end of the enlarged hole notch near the step.

[0015] Furthermore, the end of the enlarged hole notch away from the step is provided with a snap-fit ​​groove, and the snap-fit ​​groove is provided with a snap spring to prevent the cylindrical roller from disengaging from the cylindrical roller annular groove.

[0016] Furthermore, a retaining ring is provided between the retaining ring and the end of the cylindrical roller.

[0017] Furthermore, the mounting cavity has mounting grooves at both ends, and the mounting grooves are provided with dust covers that seal the two ends of the mounting cavity.

[0018] This utility model also provides a vibrating rod having the double-row bearings as described above.

[0019] Compared with existing technologies, this double-row bearing and vibratory rod improves the radial bearing capacity of the bearing through cylindrical rollers. At the same time, the cylindrical rollers preferentially bear the radial force of the bearing, playing a role in bearing protection. In addition, the double-row bearing, in conjunction with the spherical rollers, supplements the axial positioning capability and avoids the problem of misalignment between the outer and inner rings. Attached Figure Description

[0020] Figure 1 A schematic diagram of a double-row bearing provided by this utility model Figure 1 .

[0021] Figure 2 A schematic diagram of a double-row bearing provided by this utility model Figure 2 .

[0022] Figure 3 Schematic diagram of the installation of the double-row bearing in the vibrator provided by this utility model Figure 1 .

[0023] Figure 4 Schematic diagram of the installation of the double-row bearing in the vibrator provided by this utility model Figure 2 . Detailed Implementation

[0024] Example 1, please refer to Figure 1 This is a schematic diagram of a double-row bearing provided by this utility model. The double-row bearing includes an outer ring 10 and an inner ring 11 arranged coaxially. Between the outer ring 10 and the inner ring 11 are spherical rollers 21, spherical roller cages 22, cylindrical rollers 31, cylindrical roller cages 32, etc. It can be imagined that this double-row bearing also includes other structures, such as lubricating oil, seals, etc., which are all technologies known to those skilled in the art, and therefore will not be described in detail here.

[0025] Both the outer ring 10 and the inner ring 11 are cylindrical and coaxially arranged. The outer ring 10 and the inner ring 11 are spaced apart, and a mounting cavity 12 is provided between them. The annular space of the mounting cavity 12 facilitates component installation and oil circuit lubrication.

[0026] Specifically, a spherical roller annular groove 20 is provided circumferentially in the mounting cavity 12. Specifically, an inwardly recessed and corresponding arc-shaped notches 23 are provided on the inner wall of the outer ring 10 and the outer wall of the inner ring 11. The arc-shaped notches 23 communicate with the mounting cavity 12 to form the spherical roller annular groove 20. A number of spherical rollers 21 are provided in the spherical roller annular groove 20. The number of spherical rollers 21 depends on the actual size. It can be imagined that the recessed depth of the arc-shaped notch 23 is less than the radius of the spherical roller 21. The spherical roller 21 is partially located in the space of the mounting cavity 12. The two outer walls of the spherical roller 21 fit into the arc-shaped notch 23. A spherical roller cage 22 is also provided in the spherical roller annular groove 20. The spherical roller cage 22 has a space for the spherical rollers 21 to be embedded one by one, so that the spherical rollers 21 are circumferentially distributed in the spherical roller annular groove 20. The axial positioning of the bearing as a whole is achieved by the spherical rollers 21, preventing relative displacement between the inner ring 11 and the outer ring 10, and at the same time having corresponding axial and radial bearing performance.

[0027] A cylindrical roller annular groove 30 is also circumferentially arranged in the mounting cavity 12. The cylindrical roller annular groove 30 is spaced apart from the spherical roller annular groove 20. Specifically, the inner wall of the outer ring 10 away from the arc-shaped notch 23 and the outer wall of the inner ring 11 are provided with corresponding enlarged notches 33, and the enlarged notches 33 communicate with the mounting cavity 12 to form the cylindrical roller annular groove 30. A plurality of cylindrical rollers 31 are provided in the cylindrical roller annular groove 30. The number of cylindrical rollers 31 is determined according to the actual size. The recessed depth of the enlarged notch 33 is less than the radius of the cylindrical roller 31. The cylindrical rollers 31 are partially located in the space of the mounting cavity 12, and the two outer walls of the cylindrical rollers 31 fit and adhere to the inner wall of the enlarged notch 33. A cylindrical roller retainer 32 is provided in the cylindrical roller annular groove 30 to keep the cylindrical rollers 31 circumferentially distributed in the cylindrical roller annular groove 30. The cylindrical roller 31 enables the double-row bearing to withstand greater radial force. In this embodiment, the enlarged notch 33 is opened axially inward from the end of the mounting cavity 12, which facilitates the machining of the cylindrical roller annular groove 30 and the installation of the cylindrical roller 31.

[0028] Optimally, the enlarged notch 33 has a step 34 at one end near the arc-shaped notch 23. The cylindrical roller 31 axially abuts against the step 34. The structure of the outer ring 10 and the inner ring 11 serves as an axial constraint at one end of the cylindrical roller 31, facilitating the installation stability of the cylindrical roller 31 in the cylindrical roller annular groove 30. A relief groove 35 is provided at one end of the enlarged notch 33 near the step 34. The relief groove 35 facilitates the inflow of lubricating oil and provides sufficient lubrication surface on the side of the cylindrical roller 31 near the step 34, preventing wear at the corner end of the step 34.

[0029] In this embodiment, a retaining groove 36 is provided at the end of the enlarged notch 33 away from the step 34. A retaining spring 37 is provided in the retaining groove 36 to prevent the cylindrical roller 31 from disengaging from the cylindrical roller annular groove 30. The retaining spring 37 is a C-shaped spring that provides axial restraint on the other end of the cylindrical roller 31 by elastically embedding itself in the retaining groove 36. Optimally, a retaining ring 38 is provided between the retaining spring 37 and the end of the cylindrical roller 31. The retaining ring 38 increases the contact surface with the cylindrical roller 31 and also increases the rotational performance of the end of the cylindrical roller 31, thereby improving the bearing's rotational performance.

[0030] In other embodiments, please refer to Figure 2 The enlarged notch 33 can also be set in the middle section of the mounting cavity 12.

[0031] The inner diameters of both the spherical roller annular groove 20 and the cylindrical roller annular groove 30 are larger than the inner diameter of the mounting cavity 12. This structure ensures that the spherical roller 21 and the cylindrical roller 31 do not interfere with each other within their respective spherical roller annular grooves 20 and 30. More optimally, the inner diameter of the cylindrical roller annular groove 30 is larger than that of the spherical roller annular groove 20. This improves the radial bearing capacity of the bearing through the cylindrical roller 31, while also preferentially bearing the radial force of the bearing, thus protecting it. Furthermore, in conjunction with the spherical roller 21, it forms a double-row bearing to supplement axial positioning capability, preventing misalignment between the outer ring 10 and the inner ring 11.

[0032] In this embodiment, mounting grooves 40 are provided at both ends of the mounting cavity 12, and dust covers 41 that seal the two ends of the mounting cavity 12 are provided in the mounting grooves 40. The dust covers 41 prevent dust and impurities from entering the bearing and affecting the bearing performance.

[0033] Example 2, please refer to Figures 3 to 4 This utility model also provides a vibratory rod having the double-row bearings described above. Except for the double-row bearings, all other components are existing technology or commercially available parts. In this embodiment, it is conceivable that two of the aforementioned double-row bearings can be symmetrically combined in the vibratory rod, forming a double-end fulcrum at the output end of the vibratory rod through the spaced-apart double-row bearings, further improving the application performance of the double-row bearings in the vibratory rod.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A double-row bearing, characterized in that, include: An outer ring (10) and an inner ring (11) are coaxially arranged, the outer ring (10) and the inner ring (11) are spaced apart and a mounting cavity (12) is provided between them; A spherical roller annular groove (20) is arranged circumferentially along the mounting cavity (12). A plurality of spherical rollers (21) are provided in the spherical roller annular groove (20), and a spherical roller retainer (22) is provided in the spherical roller annular groove (20) to keep the spherical rollers (21) circumferentially distributed. A cylindrical roller annular groove (30) is arranged circumferentially along the mounting cavity (12) and spaced apart from the spherical roller annular groove (20). The cylindrical roller annular groove (30) contains a plurality of cylindrical rollers (31) and a cylindrical roller retainer (32) is arranged in the cylindrical roller annular groove (30) to keep the cylindrical rollers (31) circumferentially distributed. The inner diameter of the spherical roller annular groove (20) and the inner diameter of the cylindrical roller annular groove (30) are both larger than the inner diameter of the mounting cavity (12).

2. The double-row bearing according to claim 1, characterized in that, The inner diameter of the cylindrical roller annular groove (30) is larger than the inner diameter of the spherical roller annular groove (20).

3. The double-row bearing according to claim 1, characterized in that, The inner wall of the outer ring (10) and the outer wall of the inner ring (11) are provided with corresponding arc-shaped notches (23), and the arc-shaped notches (23) communicate with the mounting cavity (12) to form a spherical roller annular groove (20), and the two sides of the spherical roller (21) fit into the arc-shaped notches (23).

4. The double-row bearing according to claim 1, characterized in that, The inner wall of the outer ring (10) away from the arc-shaped notch (23) is provided with a corresponding enlarged hole notch (33) on the outer wall of the inner ring (11), and the enlarged hole notch (33) communicates with the mounting cavity (12) to form a cylindrical roller annular groove (30), and the two sides of the cylindrical roller (31) fit and adhere to the inner wall of the enlarged hole notch (33).

5. The double-row bearing according to claim 4, characterized in that, The enlarged notch (33) has a step (34) at one end near the arc notch (23), and the cylindrical roller (31) abuts axially against the step (34).

6. The double-row bearing according to claim 5, characterized in that, The enlarged notch (33) has a relief groove (35) at one end near the step (34).

7. The double-row bearing according to claim 5, characterized in that, The end of the enlarged notch (33) away from the step (34) is provided with a snap-fit ​​groove (36), and the snap-fit ​​groove (36) is provided with a snap ring (37) to prevent the cylindrical roller (31) from disengaging from the cylindrical roller annular groove (30).

8. The double-row bearing according to claim 7, characterized in that, A retaining ring (38) is provided between the snap ring (37) and the end of the cylindrical roller (31).

9. The double-row bearing according to claim 6, characterized in that, The mounting cavity (12) is provided with mounting grooves (40) at both ends, and dust covers (41) that seal the two ends of the mounting cavity (12) are provided in the mounting grooves (40).

10. A vibrating rod, characterized in that, It has a double-row bearing as described in any one of claims 1-9.

Images