Cylindrical roller bearing

Abstract

The utility model relates to bearing technical field, concretely is a cylindrical roller bearing, it includes inner ring, outer ring, retainer and roller, the retainer sets up between the inner ring and the outer ring, the retainer includes multiple section retainer monomer, the retainer monomer is set up with multiple pockets, the both ends of retainer monomer are set up with end pocket half -groove, and the both sides of end pocket half -groove are set up as polishing convex part, the roller sets up in the pocket and end pocket half -groove inside. The utility model discloses segmented retainer, can guarantee the carrying capacity, and is convenient for processing, reduces the cost, and the end of retainer monomer is polished, avoids the mutual destruction between the two adjacent retainer monomers, thereby influences use.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a cylindrical roller bearing. Background Technology

[0002] Cylindrical roller bearings use cylindrical rollers as rolling elements. The internal structure of a cylindrical roller bearing features parallel rollers with cages or spacers between them to prevent tilting or friction between the rollers, effectively preventing an increase in rotational torque. To ensure load-bearing capacity, the cage is usually a one-piece structure, but the overall machining cost of the cage is relatively high. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides a cylindrical roller bearing with a segmented cage, which can not only ensure load-bearing capacity, but also facilitate processing and reduce costs.

[0004] To achieve the above objectives, the present invention provides a cylindrical roller bearing, which includes an inner ring, an outer ring, a cage, and rollers. The cage is disposed between the inner ring and the outer ring. The cage includes multiple cage units, each cage unit having multiple pockets. Each cage unit has end pocket semi-grooves at both ends, and the two sides of the end pocket semi-grooves are provided with polished protrusions. The rollers are disposed inside the pockets and the end pocket semi-grooves.

[0005] Furthermore, the polishing protrusion includes two inclined surfaces that form an acute angle with each other.

[0006] Preferably, the included angle between the two inclined surfaces is 32°.

[0007] Furthermore, a gap is provided between two adjacent cage units.

[0008] Furthermore, the outer ring has an outer ring groove on the inner diameter surface near both ends, and the inner ring has an inner ring groove on each of its two ends. The sealing ring is embedded in the outer ring groove, and the sealing lip of the sealing ring contacts and seals with the inner ring groove.

[0009] Furthermore, the outer ring is provided with a ball-loading groove, and a ball-blocking block is provided in the ball-loading groove.

[0010] Furthermore, at the ball loading groove position, a positioning hole is provided axially through the upper and lower end faces of the outer ring, and a through hole is provided axially for the ball blocking sub-block. The ball blocking sub-block is inserted into the ball loading groove so that the positioning hole and the through hole correspond to each other and form a conical hole. A conical pin is inserted into the conical hole to fix the ball blocking sub-block.

[0011] Furthermore, the cage unit is provided with four sections.

[0012] Furthermore, the outer ring has an outer ring connection hole; the inner ring has an inner ring connection hole.

[0013] The beneficial effects of this utility model are as follows: the segmented cage can ensure load-bearing capacity, facilitate processing, and reduce costs. In addition, the ends of the cage units are ground, and the cage will move up and down during the operation of the bearing and occasionally tilt, which avoids damage between two adjacent cage units and thus affects the use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a cylindrical roller bearing in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a cylindrical roller bearing after installation in one embodiment of the present invention; Figure 3 This is a partial schematic diagram of a cylindrical roller bearing according to one embodiment of the present invention; Figure 4 This is a schematic diagram of the cage structure of a cylindrical roller bearing according to one embodiment of the present invention; Figure 5 This is a top view schematic diagram of the grinding protrusion of a cylindrical roller bearing in one embodiment of the present invention; Figure 6 This is a front view of a grinding protrusion in a cylindrical roller bearing according to one embodiment of the present invention; Figure 7 This is a partial schematic diagram of the cage of a cylindrical roller bearing after the rollers are installed in one embodiment of the present invention; Figure 8 This is a partial schematic diagram of a cage for a cylindrical roller bearing according to one embodiment of the present invention; In the picture: 100. Inner ring; 110. Inner ring groove; 120. Inner ring connecting hole. 200, Outer ring; 210, Ball inlet groove; 220, Ball plug; 221, Through hole; 230, Positioning hole; 240, Outer ring connecting hole; 250, Outer ring groove. 300. Cage; 310. Cage unit; 311. Pocket; 312. End pocket half-groove; 3121. Grinded protrusion; 3122. Inclined surface. 400, Roller, 500, tapered pin, 600, sealing ring; 610, sealing lip. Detailed Implementation

[0015] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] See Figure 1 The diagram shows a structural schematic of a cylindrical roller bearing according to the present invention, which includes an inner ring 100, an outer ring 200, a cage 300, and rollers 400. The cage 300 is disposed between the inner ring 100 and the outer ring 200. (See also...) Figures 4-8 The cage 300 includes multiple cage units 310, each cage unit 310 having multiple pockets 311, and each cage unit 310 having end pocket half-grooves 312 at both ends, with polished protrusions 3121 on both sides of the end pocket half-grooves 312; the roller 400 is disposed inside the pockets 311 and pocket half-grooves 312.

[0017] See details Figure 8 In one embodiment, the polishing protrusion 3121 includes two inclined surfaces 3122 that are at acute angles to each other.

[0018] See details Figure 6 In one embodiment, a gap is provided between two adjacent cage units 310.

[0019] The aforementioned cylindrical roller bearing employs a segmented cage, which ensures load-bearing capacity while facilitating manufacturing and reducing costs. Furthermore, the ends of the cage units are ground. During bearing operation, the cage may move up and down, and occasionally tilt. Grinding the ends into a tapered shape with a gap prevents adjacent cage units from damaging each other, thus affecting performance. Figure 5 As shown, in this embodiment, the included angle α between the two inclined surfaces 3122 of the polished protrusion 3121 is 32°, and the length L is 9mm. This setting can ensure the load-bearing capacity and minimize the risk of collision.

[0020] During processing, the segmented cage requires treatment of the cage pocket 311 at the break point. First, a groove is made in the cage pocket at the break point to disconnect the connection between the cages. Rollers also need to be installed at the break point to ensure that the break points do not collide with each other and to maintain the load-bearing capacity, thus ensuring maximum load-bearing capacity. Secondly, the break point needs to be ground according to certain requirements to ensure that the angle α, length L, and distance B between the two break points are maintained. This grinding process will not cause wear on the roller 400 and the inner and outer ring flanges. During operation, the cage will move up and down and occasionally tilt. If the cross-section is straight, it will wear down the inner and outer flanges, causing mutual damage and affecting the use. However, the disconnected cage will not affect the use, as the roller 400 restricts the pocket 311, ensuring the normal operation of the bearing.

[0021] In one embodiment, an outer ring groove 250 is formed on the inner diameter surface of the outer ring 200 near both end faces, and an inner ring groove 110 is formed on both end faces of the inner ring 100. The sealing ring 600 is embedded in the outer ring groove 250, and the sealing lip 610 of the sealing ring 600 contacts and seals with the inner ring groove 110.

[0022] In one embodiment, the outer ring 200 is provided with a ball loading groove 210, and a ball blocking block 220 is provided in the ball loading groove 210.

[0023] In one embodiment, at the ball loading groove 210, a positioning hole 230 is provided axially through the upper and lower end faces of the outer ring 200, and a ball blocking block 220 is provided axially through a through hole 221. The ball blocking block 220 is inserted into the ball loading groove 210 so that the positioning hole 230 and the through hole 221 correspond to each other and form a conical hole. A conical pin 500 is inserted into the conical hole to fix the ball blocking block 220.

[0024] In one embodiment, the cage unit 310 is provided with four sections. In this embodiment, the overall machining cost of the cage is too high, so it is machined in four sections, which reduces costs while ensuring the operation of the bearing.

[0025] The cylindrical roller bearing of this utility model consists of an outer ring 200, an inner ring 100, rollers 400, a cage 300, a ball-filling block 220, a tapered pin 500, and a sealing ring 600. The bearing assembly sequence is as follows: After elevating the inner ring 100, place the cage 300, then place the outer ring 200. The rollers are sequentially placed into the cage pockets 311 within the raceway through the ball-filling grooves 210 on the outer diameter of the outer ring 200. After the rollers 400 are installed, the ball-filling grooves 210 are plugged with the ball-filling block 220, and then the ball-filling block 220 is fixed in place with the tapered pin 500. Finally, the sealing ring 600 is glued into the bearing, completing the installation.

[0026] In one embodiment, the outer ring 200 has an outer ring connecting hole 240; the inner ring 100 has an inner ring connecting hole 120.

[0027] like Figure 2 and Figure 3 As shown, the bearing is mounted on a bracket of a precision machine tool testing instrument. The bearing is vertically mounted, and this cylindrical roller bearing is installed at the tail end of the shaft. During installation, the bearing is lifted and mounted as a whole onto the shaft through the lifting holes on the upper and lower end faces. The bearing is not removable. After installation, the bearing is fixed to the machine tool equipment through the inner ring 100 and outer ring 200, which have inner ring connecting holes 120 and outer ring connecting holes 240. During machine tool operation, temperature rise can cause axial movement of the shaft. Since the equipment does not have sufficient clearance, the design considers that the outer ring raceway width is larger than the rollers, leaving a certain clearance to ensure that the bearing has sufficient axial movement allowance when temperature rises, thus better meeting the operating conditions.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. A cylindrical roller bearing, characterized in that: include Inner circle; Outer ring; A retainer is disposed between the inner ring and the outer ring. The retainer includes multiple retainer units, each retainer unit having multiple pockets. Both ends of each retainer unit have end pocket half-grooves, and both sides of the end pocket half-grooves are provided with polished protrusions. Rollers are disposed inside the pocket and the end pocket half-groove.

2. A cylindrical roller bearing according to claim 1, characterized in that: The polishing protrusion includes two inclined surfaces that form an acute angle with each other.

3. A cylindrical roller bearing according to claim 2, characterized in that: The angle between the two inclined surfaces is 32°.

4. A cylindrical roller bearing according to claim 1, characterized in that: There is a gap between two adjacent cage units.

5. A cylindrical roller bearing according to any one of claims 1-4, characterized in that: The outer ring has an outer ring groove on its inner diameter surface near both ends, and the inner ring has an inner ring groove on each of its two ends. The sealing ring is embedded in the outer ring groove, and the sealing lip of the sealing ring contacts and seals with the inner ring groove.

6. A cylindrical roller bearing according to any one of claims 1-4, characterized in that: The outer ring is provided with a ball loading groove, and a ball blocking block is provided in the ball loading groove.

7. A cylindrical roller bearing according to claim 6, characterized in that: At the ball loading groove position, a positioning hole is provided axially through the upper and lower end faces of the outer ring, and a through hole is provided axially for the ball blocking block. The ball blocking block is inserted into the ball loading groove so that the positioning hole and the through hole correspond to each other and form a conical hole. A conical pin is inserted into the conical hole to fix the ball blocking block.

8. A cylindrical roller bearing according to any one of claims 1-4, characterized in that: The cage unit is provided with four sections.

9. A cylindrical roller bearing according to any one of claims 1-4, characterized in that: The outer ring has an outer ring connection hole; the inner ring has an inner ring connection hole.

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