CN216589589U - Needle roller bearing capable of switching between single rotation and double rotation - Google Patents
Needle roller bearing capable of switching between single rotation and double rotation Download PDFInfo
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- CN216589589U CN216589589U CN202122876783.8U CN202122876783U CN216589589U CN 216589589 U CN216589589 U CN 216589589U CN 202122876783 U CN202122876783 U CN 202122876783U CN 216589589 U CN216589589 U CN 216589589U
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- outer ring
- retainer
- track
- roller
- bidirectional
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Abstract
The utility model relates to the technical field of bearings, in particular to a needle bearing capable of switching single and double rotation. The utility model provides a needle bearing capable of switching between unidirectional and bidirectional rotation. The method comprises the following steps: the roller pin comprises an outer ring, a retainer arranged on the inner side of the outer ring and a plurality of roller pins arranged on the retainer, wherein the roller pins can rotate around a shaft; the outer ring is in a round cover shape, two ends of the outer ring are both provided with openings, and the inner wall of the outer ring is provided with a plurality of rotating tracks; when the retainer rotates until the roller pins are abutted against the rotating track, the roller pins can only rotate in one direction; when the retainer rotates until the roller pins are in clearance fit with the rotating track, the roller pins can rotate in two directions. The rolling needle can be switched to a one-way or two-way rotating working state under different working environments by the arrangement of the rotating track.
Description
Technical Field
The utility model relates to the technical field of bearings, in particular to a needle bearing capable of switching single-direction and double-direction rotation.
Background
The E-BIKE is a bicycle, and a rider pedals the E-BIKE and drives the E-BIKE to move; the power-assisted bicycle can provide power for a rider when the rider needs the most effort to start, accelerate, upwind, ascend a slope and the like. Some E-BIKE power-assisted systems need to sense when and how much force a rider needs to give by means of a torque sensor, and then control a motor to apply driving force timely and properly through an algorithm. A typical booster system does not have the above-described function, and normally triggers the motor to operate only according to conditions such as a vehicle speed.
The corresponding bearing is generally arranged at the middle shaft of the bicycle and used for switching the E-BIKE into different working states.
Most of the bearings produced and sold in the market at present can only rotate in two directions or in one direction. With the development of the market, the requirements on the bearing are more and more, and the demand is more and more, so that the utility model of the needle bearing which can adapt to different working conditions and switch the unidirectional rotation or the bidirectional rotation is necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a needle bearing capable of switching between unidirectional and bidirectional rotation so as to solve the problems.
In order to achieve the above object, an embodiment of the present invention provides a needle bearing capable of switching between unidirectional and bidirectional rotations, including: the roller pin comprises an outer ring, a retainer arranged on the inner side of the outer ring and a plurality of roller pins arranged on the retainer, wherein the roller pins can rotate around a shaft;
the outer ring is in a round cover shape, two ends of the outer ring are both provided with openings, and the inner wall of the outer ring is provided with a plurality of rotating tracks; wherein
When the retainer rotates until the roller pins abut against the rotating track, the roller pins can only rotate in one direction; when the retainer rotates until the roller pins are in clearance fit with the rotating track, the roller pins can rotate in two directions.
Further, the rotating tracks comprise one-way tracks and two-way tracks, and one-way track and one two-way track correspond to one roller pin;
the one-way track is linear, the distance from the one-way track to the outer wall of the outer ring is gradually reduced from one end to the other end, and the roller pin can rotate to abut against the one-way track;
the bidirectional track is arc-shaped, the bending direction of the bidirectional track faces the roller pins, a gap is formed between the bidirectional track and the roller pins, and the roller pins can rotate to be in clearance fit with the bidirectional track; wherein
When the retainer rotates until the roller pins are abutted against the unidirectional track, the roller pins can only rotate towards one side close to the bidirectional track;
when the retainer rotates until the roller pins are in clearance fit with the bidirectional tracks, the roller pins can rotate bidirectionally.
Further, one end, with a smaller distance from the outer wall of the outer ring, of the one-way track is connected with the two-way track;
the retainer can drive the needle rollers to axially rotate relative to the outer ring, and the needle rollers are switched to abut against the unidirectional tracks or to be in clearance fit with the bidirectional tracks, so that unidirectional rotation and bidirectional rotation of the needle rollers are switched.
Furthermore, a plurality of adjusting handles are fixed on the outer wall of the retainer, a plurality of adjusting grooves are formed in one end of the outer ring, and one adjusting handle corresponds to one adjusting groove; wherein
When the adjusting handle rotates to abut against one end of the adjusting groove, the roller pin rotates to abut against the one-way track;
when the adjusting handle rotates to abut against the other end of the adjusting groove, the roller pin rotates to be in clearance fit with the bidirectional track.
Furthermore, the adjusting handles are uniformly distributed along the circumferential direction of the outer wall of the retainer.
Furthermore, a positioning ring is arranged on the outer side of the retainer, and the positioning ring is matched with the outer ring;
after the retainer is inserted into the outer ring along the adjusting groove, the positioning ring can be inserted into the outer ring from an outer side card so as to axially position the retainer.
Furthermore, the retainer is in a hub shape, a plurality of window holes are uniformly formed in the circumferential direction of the side wall of the retainer, and the roller pins are suitable for being placed in the window holes.
Furthermore, two filtering units are oppositely arranged on two side walls of the window hole, each filtering unit comprises a blocking sheet and a plurality of filtering sheets, the blocking sheets are fixed on the side walls of the window hole, and the filtering sheets are fixed on the side, close to the roller pins, of each blocking sheet;
the barrier sheet and the filter sheet are both elastic;
the blocking piece is arc-shaped, one end of the blocking piece is fixed on the inner side wall of the window hole, and the other end of the blocking piece extends outwards to be attached to the outer wall of the roller pin;
the filter sheet is arc-shaped, the bending direction of the filter sheet is opposite to that of the blocking sheet, one end of the filter sheet is fixed on the inner side wall of the blocking sheet, and the other end of the filter sheet is attached to the outer wall of the roller pin; wherein
The blocking sheet can block large solid particles from entering the inner side of the outer ring, and the filter sheet can block small solid particles from entering the inner side of the outer ring.
Compared with the prior art, the embodiment of the utility model has the following beneficial effects: the utility model provides a needle bearing capable of switching between unidirectional and bidirectional rotation. The method comprises the following steps: the roller pin comprises an outer ring, a retainer arranged on the inner side of the outer ring and a plurality of roller pins arranged on the retainer, wherein the roller pins can rotate around a shaft; the outer ring is in a round cover shape, two ends of the outer ring are both provided with openings, and the inner wall of the outer ring is provided with a plurality of rotating tracks; when the retainer rotates until the roller pins are abutted against the rotating track, the roller pins can only rotate in one direction; when the retainer rotates until the roller pins are in clearance fit with the rotating track, the roller pins can rotate in two directions. The rolling needle can be switched to a one-way or two-way rotating working state under different working environments by the arrangement of the rotating track.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
FIG. 1 illustrates a needle bearing of the present invention capable of switching single and double rotation;
FIG. 2 shows a cross-sectional view of a needle bearing of the present invention capable of switching single and double rotation;
fig. 3 shows a partially enlarged view of a portion a in fig. 2;
fig. 4 is a schematic view showing a state that the needle roller is in clearance fit with the bidirectional track.
In the figure:
1. an outer ring; 11. rotating the rail; 111. a one-way track; 112. a bidirectional track; 12. an adjustment groove;
2. a holder; 21. an adjusting handle; 22. a window aperture;
3. rolling needles; 4. a positioning ring;
5. a filtration unit; 51. a barrier sheet; 52. a filter disc.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1 to 4, an embodiment of the present invention provides a needle roller bearing capable of switching between unidirectional and bidirectional rotations, including: the needle roller comprises an outer ring 1, a retainer 2 arranged on the inner side of the outer ring 1 and a plurality of needle rollers 3 arranged on the retainer 2. The outer ring 1 is suitable for mounting and fixing the retainer 2; the retainer 2 is suitable for mounting a plurality of rolling needles 3; the plurality of needle rollers 3 can rotate along with the adaptive rotating shaft and bear radial load of the rotating shaft. With respect to the above components, a detailed description is given below.
Outer ring
The outer ring 1 is in a round cover shape, two ends of the outer ring 1 are both provided with openings, and the inner side wall of the outer ring 1 is suitable for mounting and fixing the retainer 2. The outer ring 1 forms the basic outer contour of the needle bearing capable of switching the unidirectional and bidirectional rotation shown in the embodiment, and the rotating shaft can penetrate through the outer ring 1 from openings at two sides to realize the installation of the bearing and the rotating shaft.
Holding rack
The retainer 2 is in a hub shape, and the retainer 2 is matched with the outer ring 1. Specifically, the retainer 2 can be inserted into the outer ring 1 in the direction in which the side wall of the outer ring 1 extends, and after the retainer 2 is inserted into the outer ring 1, one side wall of the retainer 2 can abut against the inner bottom wall of the outer ring 1. A plurality of window holes 22 are uniformly formed in the circumferential direction of the side wall of the retainer 2, and the needle rollers 3 are suitable to be placed in the window holes 22. The window hole 22 is opened along the thickness direction of the retainer 2, the width of the window hole 22 is larger than the diameter of the needle roller 3, and the length of the window hole 22 is larger than the length of the needle roller 3. With this arrangement, both ends of the needle roller 3 can be interference-fitted with the inner wall of the window hole 22 through an oil film, so that the needle roller 3 can be accommodated in the corresponding window hole 22, while the needle roller 3 can be axially rotated in the corresponding window hole 22 without being blocked by the window hole 22. Further, the cage 2 has a thickness smaller than the diameter of the needle rollers 3 so that the needle rollers 3 protrude out of the inner wall of the cage 2 and the outer wall of the cage 2, respectively. A gap is formed between the outer wall of the retainer 2 and the inner wall of the outer ring 1, the retainer 2 and the outer ring 1 can rotate relatively, and when the retainer 2 rotates until the roller pins 3 abut against the inner wall of the outer ring 1, the roller pins 3 can only rotate in one direction; when the retainer 2 rotates until the roller pins 3 are in clearance fit with the inner wall of the outer ring 1, the roller pins 3 can rotate in two directions. After the rotating shaft is axially inserted along the opening of the outer ring 1, the rotating shaft can be propped against the plurality of rolling needles 3. The needle rollers 3 can be adapted to the respective shafts and carry radial loads on the shafts.
In order to achieve the effect, the inner wall of the outer ring 1 is provided with a plurality of rotating tracks 11, and one rotating track 11 corresponds to one roller pin 3. The roller pins 3 can rotate in the corresponding rotating tracks 11, and the distance from the outermost side of the roller pins 3 to the outer wall of the outer ring 1 is smaller than the distance from the inner wall of the outer ring 1 to the outer wall of the outer ring 1, so that the roller pins 3 can only rotate in the corresponding rotating tracks 11. The rotating tracks 11 are uniformly distributed on the inner wall of the outer ring 1 in the circumferential direction. One rotation rail 11 can be divided into a unidirectional rail 111 and a bidirectional rail 112.
The one-way track 111 is linear, and the distance from the one-way track 111 to the outer wall of the outer ring 1 gradually decreases from one end to the other end, and the needle roller 3 can rotate to abut against the one-way track 111. When the roller pin 3 moves along with the retainer 2 to abut against the one-way track 111, one end of the roller pin 3 abuts against the rotating shaft, and the other end of the roller pin 3 abuts against the one-way track 111, at this time, the roller pin 3 is blocked to rotate towards the side increasing from the outer wall of the outer ring 1 along the one-way track 111, and the roller pin 3 can only rotate towards the side decreasing from the outer wall of the outer ring 1 along the one-way track 111.
The bidirectional rail 112 is arc-shaped, the bending direction of the bidirectional rail 112 faces the needle rollers 3, a gap is formed between the bidirectional rail 112 and the needle rollers 3, and the needle rollers 3 can rotate to be in clearance fit with the bidirectional rail 112. When the roller pin 3 moves to be in clearance fit with the bidirectional track 112 along with the retainer 2, one end of the roller pin 3 is abutted against the rotating shaft, and the other end of the roller pin 3 is free of contact, so that the roller pin 3 can rotate bidirectionally without blocking.
The end of the one-way track 111, which is at a smaller distance from the outer wall of the outer ring 1, is connected to the two-way track 112. The unidirectional track 111 and the bidirectional track 112 form a closed movable region, and the retainer 2 drives the roller pin 3 to rotate so as to be continuously driven to abut against the unidirectional track 111 or be in clearance fit with the bidirectional track 112, so that the roller pin 3 is switched between two working states of unidirectional rotation and bidirectional rotation.
In order to control the unidirectional rotation and bidirectional rotation switching of the roller pin 3, namely, the roller pin 3 is controlled to abut against the unidirectional track 111 or to be in clearance fit with the bidirectional track 112, a plurality of adjusting handles 21 are fixed on the outer wall of the retainer 2, a plurality of adjusting grooves 12 are formed in one end of the outer ring 1, one adjusting handle 21 corresponds to one adjusting groove 12, and the width of each adjusting groove 12 is greater than that of each adjusting handle 21. The adjusting handles 21 are uniformly distributed along the circumferential direction of the outer wall of the retainer 2. When the adjusting handle 21 rotates to abut against one end of the adjusting groove 12, the roller pin 3 rotates to abut against the one-way track 111; when the adjusting handle 21 is rotated to abut against the other end of the adjusting groove 12, the needle roller 3 is rotated to be in clearance fit with the bidirectional track 112.
In order to axially fix the cage 2 in the outer ring 1. A positioning ring 4 is arranged on the outer side of the retainer 2, and the positioning ring 4 is matched with the outer ring 1. After the holder 2 is inserted into the outer ring 1 along the adjustment groove 12, the positioning ring 4 can be inserted into the outer ring 1 from the outside so as to axially position the holder 2.
In order to enhance the working stability of the bearing, solid particles are prevented from entering the gap between the window hole 22 and the needle roller 3 and the gap between the inner wall of the outer ring 1 and the outer wall of the cage 2, which causes the bearing to fail. Two filter units 5 are oppositely arranged on two side walls of the window hole 22, each filter unit 5 comprises a barrier sheet 51 and a plurality of filter sheets 52, the barrier sheets 51 are fixed on the side walls of the window hole 22, and the filter sheets 52 are fixed on one sides, close to the roller pins 3, of the barrier sheets 51. The barrier piece 51 has an arc shape, and the bending direction of the barrier piece 51 is the same as the bending direction of the corresponding needle roller 3. One end of the barrier sheet 51 is fixed on the inner side wall of the window hole 22, and the other end extends outwards to be attached to the outer wall of the roller pin 3. The blocking sheet 51 can block the larger solid particles from entering the inner side of the outer ring 1. The filter sheet 52 has an arc shape, and in this embodiment, the number of the filter sheets 52 inside one barrier sheet 51 is preferably three, and the bending direction of the filter sheet 52 is opposite to the bending direction of the barrier sheet 51. One end of the filter 52 is fixed on the inner side wall of the barrier 51, and the other end is attached to the outer wall of the needle roller 3. The filter 52 can block smaller solid particles from entering the inside of the outer ring 1. Both the barrier sheet 51 and the filter sheet 52 have elasticity. In this embodiment, the material of the barrier sheet 51 and the filter sheet 52 is preferably flexible polyurethane foam. During the rotation of the flexible polyurethane foam roller pin 3, the one side barrier sheet 51 and the filter sheet 52 are bent and bent to increase the bending degree, and the other side barrier sheet 51 and the filter sheet 52 are stretched to decrease the bending degree, but because the bending directions of the barrier sheet 51 and the filter sheet 52 are opposite, during the rotation of the roller pin 3, the barrier sheet 51 and the filter sheet 52 positioned at one side of the roller pin 3 are bent and stretched, wherein the bent one side can be kept attached to the roller pin 3, so as to ensure that solid particles can be blocked.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A needle roller bearing capable of switching between unidirectional and bidirectional rotation, comprising:
the roller pin structure comprises an outer ring (1), a retainer (2) arranged on the inner side of the outer ring (1) and a plurality of roller pins (3) arranged on the retainer (2), wherein the roller pins (3) can rotate around a shaft;
the outer ring (1) is in a round cover shape, two ends of the outer ring (1) are both opened, and the inner wall of the outer ring (1) is provided with a plurality of rotating tracks (11); wherein
When the retainer (2) rotates until the roller pins (3) are abutted against the rotating track (11), the roller pins (3) can only rotate in one direction; when the retainer (2) rotates until the roller pins (3) are in clearance fit with the rotating track (11), the roller pins (3) can rotate in two directions.
2. A needle roller bearing capable of switching between unidirectional and bidirectional rotation according to claim 1,
the rotating track (11) comprises a one-way track (111) and a two-way track (112), and one-way track (111) and one two-way track (112) correspond to one needle roller (3);
the one-way track (111) is linear, the distance from the one-way track (111) to the outer wall of the outer ring (1) is gradually reduced from one end to the other end, and the needle roller (3) can rotate to abut against the one-way track;
the bidirectional track (112) is arc-shaped, the bending direction of the bidirectional track (112) faces the roller pins (3), a gap is reserved between the bidirectional track (112) and the roller pins (3), and the roller pins (3) can rotate to be in clearance fit with the bidirectional track (112); wherein
When the retainer (2) rotates until the needle rollers (3) are abutted against the one-way track (111), the needle rollers (3) can only rotate towards one side close to the two-way track (112);
when the retainer (2) rotates until the roller pins (3) are in clearance fit with the bidirectional track (112), the roller pins (3) can rotate bidirectionally.
3. A needle roller bearing capable of switching between unidirectional and bidirectional rotation as claimed in claim 2,
the end, with smaller distance, of the one-way track (111) from the outer wall of the outer ring (1) is connected with the two-way track (112);
the retainer (2) can drive the needle rollers (3) to axially rotate relative to the outer ring (1), and the needle rollers (3) are switched to abut against the one-way track (111) or to be in clearance fit with the two-way track (112) so as to switch the one-way rotation and the two-way rotation of the needle rollers (3).
4. A needle roller bearing capable of switching between unidirectional and bidirectional rotation as claimed in claim 3,
a plurality of adjusting handles (21) are fixed on the outer wall of the retainer (2), a plurality of adjusting grooves (12) are formed in one end of the outer ring (1), and one adjusting handle (21) corresponds to one adjusting groove (12); wherein
When the adjusting handle (21) rotates to abut against one end of the adjusting groove (12), the roller pin (3) rotates to abut against the one-way track (111);
when the adjusting handle (21) rotates to abut against the other end of the adjusting groove (12), the roller pin (3) rotates to be in clearance fit with the bidirectional track (112).
5. A needle roller bearing capable of switching between unidirectional and bidirectional rotation according to claim 4,
the adjusting handles (21) are uniformly distributed along the circumferential direction of the outer wall of the retainer (2).
6. A needle roller bearing capable of switching between unidirectional and bidirectional rotation according to claim 5,
a positioning ring (4) is arranged on the outer side of the retainer (2), and the positioning ring (4) is matched with the outer ring (1);
after the retainer (2) is inserted into the outer ring (1) along the adjusting groove (12), the positioning ring (4) can be inserted into the outer ring (1) from the outer side in a clamping manner, so that the retainer (2) is axially positioned.
7. A needle roller bearing capable of switching between unidirectional and bidirectional rotation according to claim 6,
the retainer (2) is in a hub shape, a plurality of window holes (22) are uniformly formed in the circumferential direction of the side wall of the retainer (2), and the roller pins (3) are suitable for being placed in the window holes (22).
8. A needle roller bearing capable of switching between unidirectional and bidirectional rotation according to claim 7,
two filtering units (5) are oppositely arranged on two side walls of the window hole (22), each filtering unit (5) comprises a blocking sheet (51) and a plurality of filtering sheets (52), the blocking sheets (51) are fixed on the side walls of the window hole (22), and the filtering sheets (52) are fixed on one sides, close to the roller pins (3), of the blocking sheets (51);
the barrier sheet (51) and the filter sheet (52) both having elasticity;
the blocking piece (51) is arc-shaped, one end of the blocking piece (51) is fixed on the inner side wall of the window hole (22), and the other end of the blocking piece (51) extends outwards to be attached to the outer wall of the roller pin (3);
the filter sheet (52) is also arc-shaped, the bending direction of the filter sheet (52) is opposite to that of the barrier sheet (51), one end of the filter sheet (52) is fixed on the inner side wall of the barrier sheet (51), and the other end of the filter sheet is attached to the outer wall of the roller pin (3); wherein
The blocking sheet (51) can block large solid particles from entering the inner side of the outer ring (1), and the filter sheet (52) can block small solid particles from entering the inner side of the outer ring (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122876783.8U CN216589589U (en) | 2021-11-23 | 2021-11-23 | Needle roller bearing capable of switching between single rotation and double rotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122876783.8U CN216589589U (en) | 2021-11-23 | 2021-11-23 | Needle roller bearing capable of switching between single rotation and double rotation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216589589U true CN216589589U (en) | 2022-05-24 |
Family
ID=81646465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122876783.8U Active CN216589589U (en) | 2021-11-23 | 2021-11-23 | Needle roller bearing capable of switching between single rotation and double rotation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216589589U (en) |
-
2021
- 2021-11-23 CN CN202122876783.8U patent/CN216589589U/en active Active
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