CN218152030U - Z-section retainer - Google Patents

Abstract

The utility model relates to a bearing field especially relates to a Z-shaped cross-section holder. A cage comprising a tapered cage body; the conical retainer body comprises a first ring part, a second ring part and a plurality of spacing beams, wherein two end parts of the spacing beams are respectively connected with the first ring part and the second ring part; the diameter of the second ring part is larger than that of the first ring part, a plurality of partition beams are circumferentially arranged between the first ring part and the second ring part at intervals, and a pocket for embedding a roller is formed between every two adjacent partition beams; the inner side wall of the first ring part and/or the second ring part extends inwards to form an inner extending ring, and the inner extending ring comprises an inner extending section and a bending section connected to the inner end part of the inner extending section; the bending section is attached to the outer wall of the inner ring and extends towards the axis direction, and the side wall of the inner end of the bending section is in a circular arc shape matched with the outer wall of the inner ring. The radial play of the retainer is small, and the problems that the guide clearance of the existing bearing roller is too large, the retainer is not concentric, the retainer jumps greatly and the like are solved.

Description

Z-section cage

Technical Field

The utility model relates to a bearing field especially relates to a Z-shaped cross-section holder.

Background

The tapered roller bearing is a bearing with a roller in a circular truncated cone shape, which is divided into a large end and a small end according to the size of two bottom surfaces of the roller, and the tapered roller bearing is further provided with a retainer for separating and guiding the roller.

Referring to the chinese utility model patent with publication number "CN216009266U", the current holder is including the first ring portion and the second ring portion that are located roller main aspects and little end department respectively, and the circumference equipartition has a plurality of interval roof beams between first ring portion and the second ring portion, is formed with the pocket hole that supplies the tapered roller installation between the adjacent interval roof beam, and tapered roller bearing can bear and come from radial and single axial combined load, and the usage is very extensive. Further, in the above-mentioned prior patent, a first reinforcing portion is formed by bending one end of the first ring portion facing away from the spacer beam, the first reinforcing portion extends axially, and a second reinforcing portion is formed by bending one end of the second ring portion facing away from the spacer beam. This scheme sets first rib to axial extension, and the second rib sets to radial extension, strengthens the structural strength of both sides ring portion under the condition of avoiding disturbing the bearing operation, avoids under vibration and impact, and first ring portion and second ring portion fracture, and the condition that leads to the bearing to become invalid takes place, can also cooperate the bodiness to first ring portion and second ring portion department certainly, the further intensity of reinforcing holder.

Referring to the tapered roller bearing described in the above-mentioned prior patent and the tapered roller bearing shown in fig. 1 of the present application, a clearance between a cage 1 and an inner ring 2 is large and is guided by rollers; the tapered roller bearing is suitable for a low-speed environment, and the retainer and the ring are easy to be out of concentricity and jump greatly during high-speed operation, so that the noise is high and the bearing is easy to lose efficacy.

Disclosure of Invention

In order to solve the above problem, the utility model discloses a first aim at provides a holder, leave less clearance between the interior extension intra-annular terminal surface of this holder and the inner circle outer wall, do not influence the holder on the one hand and rotatory for the inner circle, on the other hand passes through the inner circle guide holder rotation, at high-speed rotation in-process, the radial play of holder is less, it is too big to have solved current bearing roller guide clearance, high-speed operation in-process holder decentraction, beat greatly, the noise is big, the scheduling problem that easily loses efficacy.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a Z-section retainer comprises a conical retainer body; the conical retainer body comprises a first ring part, a second ring part and a plurality of spacing beams, wherein two end parts of the spacing beams are respectively connected with the first ring part and the second ring part; the diameter of the second ring part is larger than that of the first ring part, a plurality of partition beams are circumferentially arranged between the first ring part and the second ring part at intervals, and a pocket for embedding a roller is formed between every two adjacent partition beams; the method is characterized in that: the inside wall of first ring portion and/or second ring portion inwards extends and is equipped with interior extension ring, and interior extension ring extends to its inner lateral wall clearance laminating inner circle outer wall at least.

The utility model adopts the above technical scheme, this technical scheme relates to a holder, this holder is on the basis of original structure, inside wall inside extension at first ring portion and/or second ring portion is equipped with interior extension ring, this interior extension ring is different from first rib and the second rib that the background art cites records in the prior patent, interior extension ring in this scheme makes its inner side lateral wall close to the inner circle outer wall to extend inwards, but not contact with the inner circle outer wall, only leave less clearance, so when this holder is installed in tapered roller bearing, leave less clearance between interior extension ring inner end face of holder and the inner circle outer wall, on the one hand do not influence the holder and rotate for the inner circle, on the other hand passes through the inner circle guide holder and rotates, in high-speed rotation process, the radial play of holder is less, it is too big to have solved current bearing roller guide clearance, high-speed operation in-process holder decentraction, beat greatly, the noise is big, the scheduling problem of easily becoming invalid.

Further, the inner extension ring comprises an inner extension section and a bending section connected to the inner end part of the inner extension section; the bending section is attached to the outer wall of the inner ring and extends towards the axis direction, and the side wall of the inner end of the bending section is in a circular arc shape matched with the outer wall of the inner ring. Under this structure, the cross-section of holder is "Z" shape, and the bending section clearance of "Z" shape is laminated inner circle outer wall, and its radial positioning's stability is better.

In a specific embodiment, the gap between the inner end side wall of the inner extension ring and the outer wall of the inner ring is between 0.2 and 0.5 mm; more preferably, the gap is controlled to be about 0.3 mm. Based on the scheme, the inner ring can guide the retainer to rotate, and the problems of non-concentricity and large jumping of the retainer in the high-speed operation process are solved.

Preferably, notches which are sunken towards the radial outer side of the inner ring of the inner extension ring are arranged on the inner ring of the inner extension ring at intervals, and a convex part is formed between every two adjacent notches; the inner end side wall of the bulge part is in clearance fit with the outer wall of the inner ring, namely, the inner end side wall of the bulge part is close to the outer wall of the inner ring, and a clearance exists between the inner end side wall of the bulge part and the outer wall of the inner ring. In the technical scheme, the notches arranged at intervals reduce the contact area between the inner extension ring and the inner ring in the high-speed running process of the bearing; the raised parts arranged at intervals still ensure that a small gap exists between the inner end of the inner extension ring of the retainer and the inner ring, so that the radial play of the retainer in high-speed rotation is small.

The inner extension section and the bending section in the scheme are only constructed on the convex part.

In addition, the notch can also be used as an oil passing hole, so that lubricating oil in the retainer can flow out.

Preferably, the inner extension ring is only arranged on the inner side wall of the first ring part, and the inner extension ring is only arranged on the inner side of the first ring part, so that the installation of the retainer, the bearing inner ring and the bearing outer ring is convenient, and the interference of the inner extension ring is not easy to occur in the installation process.

A second object of the present invention is to provide a tapered roller bearing, which comprises an inner ring, an outer ring, a retainer and a plurality of rollers; the inner ring, the retainer and the outer ring are sequentially arranged from inside to outside, a plurality of rollers are respectively embedded in pockets of the retainer, the inner ends of the rollers are arranged on the outer wall of the inner ring in a rolling manner, and the outer ends of the rollers are arranged on the inner wall of the outer ring in a rolling manner; the method is characterized in that: the retainer is the retainer, and a gap is formed between the inner side of the inner extension ring of the retainer and the outer wall of the inner ring.

The scheme provides a tapered roller bearing with the retainer, the section of the tapered roller bearing retainer is Z-shaped, the gap between the inner diameter of the small end of the retainer and the outer diameter of the small flange of the inner ring is reduced, inner ring guide is formed, and the problems of large jumping and high noise caused by the fact that the retainer and a ferrule are not concentric in the high-speed operation process are solved.

In a further scheme, an inwards concave raceway is arranged on the outer wall of the inner ring, and a part of the roller is embedded in the raceway.

Drawings

Fig. 1 is a schematic structural view of a conventional tapered roller bearing.

Fig. 2 is a perspective view of a Z-section cage according to the invention.

Fig. 3 is a sectional view of a tapered roller bearing having a cage with a Z-shaped section.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1:

as shown in fig. 2, the present embodiment relates to a cage 1 including a tapered cage body. The tapered cage body includes a first ring portion 11, a second ring portion 12, and a plurality of partition beams 13 having both end portions connected to the first ring portion 11 and the second ring portion 12, respectively. The diameter of the second ring part 12 is larger than that of the first ring part 11, a plurality of partition beams 13 are arranged between the first ring part 11 and the second ring part 12 at intervals in the circumferential direction, and pockets 14 for embedding rollers are formed between every two adjacent partition beams 13. The inner side wall of the first ring part 11 and/or the second ring part 12 extends inwards to form an inner extension ring 15, and the inner extension ring 15 at least extends to the inner end side wall of the inner extension ring 15 to be attached to the outer wall of the inner ring 2 in a clearance mode. In a specific embodiment, the clearance between the inner end side wall of the inner extension ring 15 and the outer wall of the inner ring 2 is between 0.2 and 0.5mm, and the clearance is preferably controlled to be about 0.3 mm. On the basis of the original structure, the inner side wall of the first ring part 11 and/or the inner side wall of the second ring part 12 extend inwards to form an inner extension ring 15, and the inner extension ring 15 is different from a first reinforcing part and a second reinforcing part which are described in the prior patent cited in the background art, the inner extension ring 15 in the scheme extends inwards to enable the inner side wall of the inner side wall to be close to the outer wall of the inner ring 2 but not to be in contact with the outer wall of the inner ring 2, and only a small gap is reserved, so when the retainer is installed in the tapered roller bearing, a small gap is reserved between the inner end surface of the inner extension ring 15 of the retainer and the outer wall of the inner ring 2, on one hand, the rotation of the retainer relative to the inner ring 2 is not influenced, on the other hand, the rotation of the retainer is guided by the inner ring 2, and in the high-speed rotation process, the radial play of the retainer is small, and the problems that the guide gap of the existing bearing roller is too large, the retainer is different in the high-speed operation process, the beat is large in noise, and the failure is easy to occur are solved.

In the embodiment shown in fig. 2, the inner ring of the inner extension ring 15 is provided with notches 16 spaced apart from each other and recessed radially outward, and a protrusion 17 is formed between two adjacent notches 16. The inner end side wall of the convex part 17 is close to the outer wall of the inner ring 2 and has a gap with the outer wall of the inner ring 2. In the technical scheme, the notches 16 arranged at intervals reduce the contact area of the inner extension ring 15 and the inner ring 2 in the high-speed running process of the bearing. The spaced projections 17 still ensure a small clearance between the inner end of the inner extension ring 15 of the cage and the inner ring 2, so that the cage is less subject to radial play when rotating at high speed. In addition, the notch 16 can also be used as an oil passing hole, so that lubricating oil in the retainer can flow out conveniently.

In the specific embodiment shown in the figures, the inner extension ring 15 is only arranged on the inner side wall of the first ring part 11, and the inner extension ring 15 is only arranged on the inner side of the first ring part 11, so that the installation of the retainer and the bearing inner ring 2 and the bearing outer ring is facilitated, and the interference of the inner extension ring 15 is not easy to occur in the installation process. The boss 17 includes an inner extension 171, and a bent section 172 connected to an inner end of the inner extension 171. Bend section 172 and laminate the outer wall of inner circle 2 and extend to the axis direction, the inner lateral wall of bend section 172 is arc with the outer wall looks adaptation of inner circle 2. Under the structure, the section of the retainer is Z-shaped, and the bending section 172 of the Z-shaped is in clearance fit with the outer wall of the inner ring 2, so that the stability of radial positioning is better.

A tapered roller bearing as shown in fig. 3 comprises an inner ring 2, an outer ring 3, a cage 1 and a plurality of rollers 4. The inner ring 2, the retainer 1 and the outer ring 3 are sequentially arranged from inside to outside, a plurality of rollers 4 are respectively embedded in a pocket 14 of the retainer 1, the inner ends of the rollers 4 are arranged on the outer wall of the inner ring 2 in a rolling mode, the outer ends of the rollers 4 are arranged on the inner wall of the outer ring 3 in a rolling mode, an inward-concave raceway 21 is arranged on the outer wall of the inner ring 2, and a part of the rollers 4 is embedded in the raceway 21. The cage 1 is the cage 1 as described in embodiment 1, and a gap is formed between the inner side of the inner extension ring 15 of the cage 1 and the outer wall of the inner ring 2. The scheme provides the tapered roller bearing with the retainer 1, the section of the retainer 1 of the tapered roller bearing is Z-shaped, the gap between the inner diameter of the small end of the retainer 1 and the outer diameter of the small flange of the inner ring 2 is reduced, the guide of the inner ring 2 is formed, and the problems of large jumping and high noise caused by the non-concentricity of the retainer 1 and a ferrule in the high-speed running process are avoided.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (4)

1. The Z-shaped section retainer comprises a conical retainer body; the conical retainer body comprises a first ring part (11), a second ring part (12) and a plurality of spacing beams (13) of which two end parts are respectively connected with the first ring part (11) and the second ring part (12); the diameter of the second ring part (12) is larger than that of the first ring part (11), a plurality of spacing beams (13) are arranged between the first ring part (11) and the second ring part (12) at intervals in the circumferential direction, and a pocket (14) for embedding the roller (4) is formed between every two adjacent spacing beams (13); the method is characterized in that: the inner side wall of the first ring part (11) and/or the second ring part (12) extends inwards to form an inner extending ring (15), and the inner extending ring (15) at least extends to the inner end side wall of the inner extending ring to be attached to the outer wall of the inner ring (2) in a clearance mode;

   the inner extension ring (15) comprises an inner extension section (171) and a bending section (172) connected to the inner end part of the inner extension section (171); bend section (172) laminating inner circle (2) outer wall and extend to the axis direction, the inner lateral wall of the section of bending (172) is arc with inner circle (2) outer wall looks adaptation.
2. 2. The Z-section cage of claim 1 wherein: the gap between the inner end side wall of the inner extension ring (15) and the outer wall of the inner ring (2) is 0.2-0.5 mm.
3. 3. The Z-section cage of claim 1 wherein: notches (16) which are sunken towards the radial outer side of the inner ring (15) are arranged on the inner ring of the inner extension ring at intervals, and a convex part (17) is formed between every two adjacent notches (16); the inner end side wall of the bulge part (17) is in clearance fit with the outer wall of the inner ring (2); the inner extension (171) and the bend (172) are formed only on the projection (17).
4. 4. The Z-section cage of claim 1 wherein: the inner extension ring (15) is only arranged on the inner side wall of the first ring part (11).

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