One-way bearing

Abstract

The invention discloses a one-way bearing, comprising: an outer ring; the inner ring is arranged in the outer ring, and an annular space is defined by the inner ring and the outer ring together; the retainer is arranged in the annular space, a plurality of first containing grooves are formed in the retainer and arranged at intervals in the circumferential direction of the inner ring, wedges capable of swinging are arranged in the first containing grooves and make contact with the inner ring, pressure angles are formed between the wedges and the inner ring, and the number of the pressure angles of the wedges is at least two. According to the one-way bearing, the pressure angle of the wedge block can be changed, the one-way bearing has the advantages of being easy to wedge tightly and bearing larger torque, and the problems of light-load slipping and heavy-load failure of a traditional one-way bearing are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a one-way bearing. Background Art

[0002] A one-way bearing is a bearing that can rotate freely in one direction and is locked in the other direction. The wedge-type one-way bearing mainly consists of an inner ring, an outer ring, a wedge group, a wedge cage, and a compression spring. The wedge is wedged between the inner and outer rings to transfer force from one raceway to the other. The wedge has two diagonal diameters (i.e. the distance from one corner of the wedge to the other diagonal diameter), one of which is larger than the other. The action of the wedge occurs when the inner and outer rings rotate relative to each other and force the wedge to a larger vertical position on a larger cross section. The self-locking wedge action mainly depends on the wedging of the wedge between the inner and outer rings and the self-locking angle. The basic concept of the wedge one-way bearing requires that the friction coefficient of the wedge is related to the sudden torque of the inner ring in the driving direction. This friction value must be greater than the tangent value of the self-locking angle. If the conditions are not safe, wedging will not occur. The self-locking angle is determined by the structure of the wedge, and the points on the inner and outer rings are connected with the wedges. The wedge design has a very low initial self-locking angle to ensure absolute engagement at the beginning. As the torque increases, a radial force is generated on the wedge that deflects the wedge raceway, causing the wedge to roll to a new position. Wedges are often designed to have a self-locking angle that increases gradually as it moves from the overrunning position to the maximum load-bearing position. A larger self-locking angle can reduce the radial force generated by the wedge, thereby allowing a larger torque to be transmitted as long as it is within the requirements of the elongation and Brinell hardness limit.

[0003] However, the current wedge-type one-way bearing is prone to slipping under light loads and failure under heavy loads due to the pressure angle design of the wedge, resulting in poor performance of the one-way bearing. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a one-way bearing, which can effectively solve the problems of light load slippage and heavy load failure.

[0005] According to an embodiment of the present invention, the one-way bearing comprises: an outer ring; an inner ring, wherein the inner ring is arranged inside the outer ring, and the inner ring and the outer ring jointly define an annular space; a retaining frame, wherein the retaining frame is arranged in the annular space, and a plurality of first containing grooves are provided on the retaining frame, and the plurality of first containing grooves are arranged at intervals along the circumferential direction of the inner ring, and a swingable wedge block is provided in the first containing groove, and the wedge block contacts the inner ring and forms a pressure angle with the inner ring, and there are at least two types of pressure angles of the plurality of wedge blocks.

[0006] According to the one-way bearing of the embodiment of the present invention, by setting the pressure angles of multiple wedge blocks on the retaining frame to at least two types, the pressure angle of the wedge blocks in the one-way bearing can be variable, and it has the advantages of easy wedging and bearing greater torque, effectively solving the problems of light load slippage and heavy load failure of traditional one-way bearings.

[0007] In some embodiments of the present invention, the plurality of wedge blocks include a first wedge block and a second wedge block, and the pressure angle of the first wedge block is smaller than the pressure angle of the second wedge block.

[0008] In some embodiments of the present invention, the pressure angle of the first wedge block is α, wherein 3 degrees ≤ α < 4.5 degrees.

[0009] In some embodiments of the present invention, the pressure angle of the second wedge is β, wherein 4.5 degrees ≤ β ≤ 6 degrees.

[0010] In some embodiments of the present invention, the number of the first wedge blocks is less than or equal to the number of the second wedge blocks.

[0011] In some embodiments of the present invention, the wedge blocks with the same pressure angle are spaced apart along the circumferential direction of the inner ring; or, the wedge blocks with different pressure angles among the plurality of wedge blocks are staggered in sequence along the circumferential direction of the inner ring; or, at least two wedge blocks with the same or different pressure angles are provided between any two adjacent wedge blocks with the same pressure angle.

[0012] In some embodiments of the present invention, the one-way bearing further comprises an elastic member, the elastic member is disposed on the retaining frame, and the elastic member abuts against the wedge block.

[0013] In some embodiments of the present invention, the retaining frame is provided with a plurality of second containing grooves, the number of the second containing grooves is equal to and corresponds to the number of the first containing grooves, the second containing grooves are connected to the corresponding first containing grooves, and the elastic member is provided in each of the second containing grooves.

[0014] In some embodiments of the present invention, the retaining frame is provided with a plurality of third containing grooves, the plurality of third containing grooves are spaced apart along the circumferential direction of the inner ring, rolling bodies are provided in the third containing grooves, and the rolling bodies are in rolling contact with the inner ring.

[0015] In some embodiments of the present invention, the retaining frame has a first end surface and a second end surface opposite to each other, the first receiving groove is provided on the first end surface, and the third receiving groove is provided on the second end surface.

[0016] In some embodiments of the present invention, the one-way bearing further comprises a first sealing ring and a second sealing ring, wherein the first sealing ring cover is disposed on the first end surface, and the second sealing ring cover is disposed on the second end surface.

[0017] In some embodiments of the present invention, the first sealing ring, the second sealing ring and the retaining frame are all integrally formed injection molded parts, the first sealing ring and the retaining frame are connected by snapping, and the second sealing ring and the retaining frame are connected by buckling.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is an exploded view of a one-way bearing in an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the internal structure of a one-way bearing in an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the pressure angle of the first wedge in an embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of the pressure angle of the second wedge in an embodiment of the present invention;

[0024] Figure 5 It is an assembly diagram of the outer ring, the planetary gear mounting shaft, and the planetary gear in an embodiment of the present invention.

[0025] Reference numerals:

[0026] 1. One-way bearing; 11. Outer ring; 111. Second hole; 12. Inner ring; 13. Cage; 131. First receiving groove; 132. Second receiving groove; 133. Third receiving groove; 134. First end face; 135. Second end face; 136. First clamping hole; 137. Second clamping hole; 14. Elastic member; 15. Wedge block; 151. First wedge block; 152. Second wedge block; 16. Rolling element; 17. First sealing ring; 171. Clamping column; 18. Second sealing ring; 181. Clamping block; 19. Baffle; 191. First hole; 20. Planetary gear mounting shaft; 21. Planetary gear. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it is necessary to understand that the terms "center", "length", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, features defined as “first” or “second” may explicitly or implicitly include one or more such features, and are used to distinguish and describe features, without any distinction in order or importance.

[0030] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Reference below Figure 1-Figure 5 A one-way bearing 1 according to an embodiment of the present invention is described.

[0033] like Figure 1 As shown, the one-way bearing 1 according to the embodiment of the present invention comprises: an outer ring 11 , an inner ring 12 , and a retaining frame 13 .

[0034] The inner ring 12 is arranged in the outer ring 11, and the inner ring 12 and the outer ring 11 jointly define an annular space (not shown). The retainer 13 is arranged in the annular space, and a plurality of first containing grooves 131 are arranged on the retainer 13, and the plurality of first containing grooves 131 are arranged at intervals along the circumferential direction of the inner ring 12, and a swingable wedge block 15 is arranged in the first containing groove 131, and the wedge block 15 contacts the inner ring 12 and forms a pressure angle with the inner ring 12, and the pressure angles of the plurality of wedge blocks 15 are at least two.

[0035] Since a swingable wedge 15 is provided in each first receiving groove 131, when the inner ring 12 is forced to move in a set direction, the diameter corresponding to the wedge 15 and the inner ring 12 is smaller than the distance between the outer side of the inner ring 12 and the inner side of the outer ring 11, that is, the wedge 15 will not hinder the movement of the inner ring 12, and the inner ring 12 and the outer ring 11 can rotate relative to each other. When the inner ring 12 is forced to move in a direction opposite to the set direction, the diameter corresponding to the wedge 15 and the inner ring 12 is larger than the distance between the outer side of the inner ring 12 and the inner side of the outer ring 11, and the wedge 15 will hinder the movement of the inner ring 12, playing a self-locking role, and the inner ring 12 and the outer ring 11 cannot rotate relative to each other, thereby realizing the one-way rotation function of the one-way bearing 1.

[0036] The wedge block 15 has a first point in contact with the inner ring 12 and a second point in contact with the outer ring 11. The pressure angle of the wedge block 15 may refer to the angle between the normal line passing through the first point on the inner ring 12 and the line connecting the first point and the second point (refer to Figure 3 and Figure 4 The pressure angles of the multiple wedge blocks 15 are at least two, that is, the pressure angles of the wedge blocks 15 can be two, three, etc. The wedge blocks 15 with smaller pressure angles are easy to wedge and not easy to slip, and the wedge blocks 15 with larger pressure angles can carry larger torque, that is, carry larger loads.

[0037] In addition, since the one-way bearing 1 of the present invention adopts a plurality of wedge blocks 15 with fixed pressure angles to achieve overall variable pressure angles of the plurality of wedge blocks 15, each wedge block 15 is easy to process, which can effectively reduce costs.

[0038] According to the one-way bearing 1 of the embodiment of the present invention, by setting the pressure angles of the multiple wedge blocks 15 on the retaining frame 13 to at least two types, the pressure angle of the wedge blocks 15 in the one-way bearing 1 can be made variable, and it has the advantages of easy wedging and bearing greater torque, effectively solving the problems of light load slippage and heavy load failure of traditional one-way bearings.

[0039] In some embodiments of the present invention, Figure 2 , Figure 3 and Figure 4 As shown, the plurality of wedge blocks 15 include a first wedge block 151 and a second wedge block 152 , and the pressure angle of the first wedge block 151 is smaller than the pressure angle of the second wedge block 152 .

[0040] That is to say, the multiple wedge blocks 15 include two pressure angles, the pressure angle of the first wedge block 151 is relatively small, and the pressure angle of the second wedge block 152 is relatively large. By setting the multiple wedge blocks 15 to two pressure angles, the types of wedge blocks 15 can be reduced while having the advantages of easy wedging and greater bearing torque. If the types of wedge blocks 15 are relatively small, the manufacturing process of the wedge blocks 15 can be reduced, which is conducive to reducing the manufacturing difficulty and reducing costs.

[0041] In some embodiments of the present invention, Figure 3 As shown, the pressure angle of the first wedge block 151 is α, where 3 degrees ≤ α < 4.5 degrees. That is, α can be any value of 3 degrees, 3.2 degrees, 3.4 degrees, 3.6 degrees, 3.8 degrees, 4.0 degrees, 4.2 degrees, and 4.4 degrees. Of course, this is just an example, and α can also take other values ​​within the range of 3 degrees to 4.5 degrees (excluding 4.5 degrees), which will not be repeated here.

[0042] In some embodiments of the present invention, Figure 4 As shown, the pressure angle of the second wedge block 152 is β, wherein 4.5 degrees ≤ β ≤ 6 degrees. That is, β can be any value among 4.5 degrees, 4.7 degrees, 4.9 degrees, 5.0 degrees, 5.1 degrees, 5.3 degrees, 5.5 degrees, 5.7 degrees, 5.9 degrees, and 6.0 degrees. Of course, this is just an example, and β can also take other values ​​within the range of 4.5 degrees to 6 degrees, which will not be repeated here.

[0043] In some embodiments of the present invention, the number of the first wedge blocks 151 is less than or equal to the number of the second wedge blocks 152. It can be understood that the number of the first wedge blocks 151 can be less than the number of the second wedge blocks 152. In this case, the one-way bearing 1 has the advantage of being easy to wedged, and at the same time, since the number of the second wedge blocks 152 is relatively large, the one-way bearing 1 can withstand greater torque, which can effectively reduce the probability of overload failure. The number of the first wedge blocks 151 can also be equal to the number of the second wedge blocks 152. In the case of being able to bear a large torque, the one-way bearing 1 is easier to wedged because the number of the first wedge blocks 151 is sufficient.

[0044] For example, Figure 2 As shown, the number of wedge blocks 15 is thirteen, and they are sequentially arranged and marked along the circumferential direction of the retainer 13, wherein the number of first wedge blocks 151 is three, the number of second wedge blocks 152 is ten, and the three first wedge blocks 151 are the first, fifth, and tenth ones, respectively. Of course, this is just an example, and the number and distribution of the wedge blocks 15 can also be in other forms, which will not be described one by one here.

[0045] In some embodiments of the present invention, wedge blocks 15 with the same pressure angle are arranged at intervals along the circumferential direction of the inner ring 12; or, wedge blocks 15 with different pressure angles among a plurality of wedge blocks 15 are arranged alternately in sequence along the circumferential direction of the inner ring 12; or, at least two wedge blocks 15 with the same or different pressure angles are provided between any two adjacent wedge blocks 15 with the same pressure angle.

[0046] That is to say, the wedge blocks 15 with the same pressure angle can be arranged at intervals along the circumferential direction of the inner ring 12. In this solution, it is beneficial to make the force on the inner ring 12 more uniform and the stability better.

[0047] The multiple wedge blocks 15 may also be wedges 15 with different pressure angles, which are arranged alternately in sequence along the circumferential direction of the inner ring 12. It can be understood that if there are two pressure angles, the wedge blocks 15 with the two pressure angles are arranged alternately in sequence. For example, the two pressure angles can be recorded as No. 1 and No. 2, and the arrangement of the multiple wedge blocks 15 can be No. 1, No. 2, No. 1, No. 2... If there are three pressure angles, the wedge blocks with the three pressure angles are arranged alternately in sequence. For example, the three pressure angles can be recorded as No. 1, No. 2, No. 3, and the arrangement of the multiple wedge blocks 15 can be No. 1, No. 2, No. 3, No. 1, No. 2, No. 3... In this way, the wedge blocks 15 with multiple pressure angles will be distributed more evenly, which is beneficial to improving the advantages of wedging and carrying greater torque.

[0048] Among the multiple wedge blocks 15, at least two wedge blocks 15 with the same or different pressure angles may be arranged between any two adjacent wedge blocks 15 with the same pressure angle. For example, when there are two kinds of pressure angles, they may be recorded as No. 1 and No. 2, respectively, and at least two No. 2 wedge blocks 15 may be arranged between any two adjacent No. 1 wedge blocks 15; when there are three kinds of pressure angles, they may be recorded as No. 1, No. 2, and No. 3, respectively, and one No. 2 and No. 3 wedge block may be arranged between any two adjacent No. 1 wedge blocks 15, or two No. 2 and one No. 3 may be arranged, or other combinations of No. 2 and No. 3 may also be arranged.

[0049] In some embodiments of the present invention, Figure 1 As shown, the one-way bearing 1 further includes an elastic member 14, which is arranged on the retaining frame 13 and abuts against the wedge block 15. The elastic member 14 can keep the wedge block 15 abutting against the inner ring 12, so that the state of the inner ring 12 is relatively stable, and the working stability of the wedge block 15 is improved.

[0050] It should be noted that the interval between any two adjacent wedge blocks 15 may be an equal interval or an unequal interval, which is not specifically limited here.

[0051] In some embodiments of the present invention, Figure 2 As shown, the retaining frame 13 is provided with a plurality of second containing grooves 132 , the number of the second containing grooves 132 is equal to and corresponds to the number of the first containing grooves 131 , the second containing grooves 132 are connected to the corresponding first containing grooves 131 , and an elastic member 14 is provided in each second containing groove 132 .

[0052] It can be understood that each wedge block 15 has a corresponding elastic member 14, and each wedge block 15 is pressed against the inner ring 12 by the corresponding elastic member 14. Since multiple elastic members 14 are used to stop the wedge blocks 15 instead of using a whole elastic member 14 to stop multiple wedge blocks 15, it is effectively avoided that a certain wedge block 15 is subjected to concentrated force or weak force, so that the force of each wedge block 15 is relatively uniform and stable. The second receiving groove 132 can play the role of accommodating the elastic member 14, preventing the elastic member 14 from being exposed to the outside, improving the safety of the elastic member 14, and preventing the elastic member 14 from protruding outside and affecting the installation or use of the one-way bearing 1.

[0053] Optionally, the elastic member 14 includes but is not limited to a spring, a spring sheet, and the like.

[0054] In some embodiments of the present invention, Figure 1 As shown, the retainer 13 is provided with a plurality of third grooves 133, which are arranged at intervals along the circumferential direction of the inner ring 12, and the third grooves 133 are provided with rolling bodies 16, which are in rolling contact with the inner ring 12. The inner ring 12 and the outer ring 11 can not only realize relative rotation under the action of the wedge 15, but also can rotate under the action of the rolling body 16. Since the rolling body 16 has a relatively good rolling performance, the relative rotation of the inner ring 12 and the outer ring 11 can be made more stable, the rotation performance of the one-way bearing 1 is improved, and the movement of the one-way bearing 1 is made more stable and reliable. The third groove 133 plays the role of accommodating the rolling body 16, and improves the installation reliability of the rolling body 16 on the retainer 13.

[0055] It should be noted that the spacing of the plurality of third containing grooves 133 along the circumferential direction of the inner ring 12 may be equal spacing or unequal spacing, which is not limited here.

[0056] Optionally, the rolling body 16 may include but is not limited to a ball or a roller. Correspondingly, the shape of the third receiving groove 133 is adapted to the shape of the rolling body 16. For example, Figure 1 As shown, when the rolling body 16 is a ball, the third receiving groove 133 is a ball groove; when the rolling body 16 is a roller, the third receiving groove 133 is a semi-cylindrical groove.

[0057] In some embodiments of the present invention, Figure 1 As shown, the retaining frame 13 has a first end face 134 and a second end face 135 opposite to each other, the first receiving groove 131 is provided on the first end face 134 , and the third receiving groove 133 is provided on the second end face 135 .

[0058] The first end face 134 and the second end face 135 may refer to the two axial ends of the retaining frame 13. Since the first receiving groove 131 is used to install the wedge block 15 and the third receiving groove 133 is used to install the rolling body 16, the wedge block 15 and the rolling body 16 are located on opposite sides of the retaining frame 13, which can effectively avoid installation interference between the wedge block 15 and the rolling body 16, and enable the retaining frame 13 to provide ample installation positions for the wedge block 15 and the rolling body 16, thereby improving the installation reliability of the wedge block 15 and the rolling body 16.

[0059] In some embodiments of the present invention, Figure 1 As shown, the one-way bearing 1 further includes a first sealing ring 17 and a second sealing ring 18, wherein the first sealing ring 17 is covered on the first end face 134, and the second sealing ring 18 is covered on the second end face 135. In the above technical solution, the first sealing ring 17 can play a role in preventing dust and water from the wedge block 15, thereby extending the service life of the wedge block 15 and ensuring the performance of the wedge block 15. The second sealing ring 18 can play a role in preventing dust and water from the rolling element 16, thereby extending the service life of the rolling element 16 and ensuring the performance of the rolling element 16.

[0060] In some embodiments of the present invention, the first sealing ring 17, the second sealing ring 18 and the retaining frame 13 are all integrally formed injection molded parts, the first sealing ring 17 and the retaining frame 13 are connected by snapping, and the second sealing ring 18 and the retaining frame 13 are connected by snapping.

[0061] In the above technical solution, the first sealing ring 17, the second sealing ring 18 and the retaining frame 13 are all integrally formed injection molded parts, which are relatively simple to manufacture, and the integrally formed parts have relatively good structural strength and rigidity and are not easily damaged. The first sealing ring 17 and the retaining frame 13 are connected by snapping, so that the two can be installed or disassembled, and the installation and disassembly are relatively convenient. The second sealing ring 18 and the retaining frame 13 are connected by snapping, so that the two can be installed or disassembled, and the installation and disassembly are relatively convenient.

[0062] Specifically, Figure 1 As shown, the first end surface 134 is provided with a first clamping hole 136, and the first sealing ring 17 is provided with a clamping column 171, which is clamped in the first clamping hole 136. The clamping cooperation between the first clamping hole 136 and the clamping column 171 makes the structure simpler and convenient to install or remove.

[0063] Alternatively, if Figure 1 As shown, there are a plurality of first clamping holes 136, which are arranged at intervals along the circumferential direction of the retainer 13, and a plurality of clamping columns 171, which are arranged at intervals along the circumferential direction of the first sealing ring 17. The plurality of clamping columns 171 and the plurality of first clamping holes 136 are arranged in a one-to-one correspondence. By increasing the number of first clamping holes 136 and clamping columns 171, the installation reliability of the first sealing ring 17 can be improved.

[0064] Specifically, Figure 1 As shown, the second end surface 135 is provided with a second clamping hole 137, and the second sealing ring 18 is provided with a clamping block 181, which is clamped in the second clamping hole 137. The clamping cooperation between the second clamping hole 137 and the clamping block 181 makes the structure simpler and convenient to install or remove.

[0065] Alternatively, if Figure 1 As shown, there are multiple second clamping holes 137, which are spaced apart along the circumferential direction of the retainer 13, and there are multiple clamping blocks 181, which are spaced apart along the circumferential direction of the second sealing ring 18. The multiple clamping blocks 181 are arranged one-to-one with the multiple second clamping holes 137. By increasing the number of second clamping holes 137 and clamping blocks 181, the installation reliability of the second sealing ring 18 can be improved.

[0066] It should be noted that the spacing of the plurality of first clamping holes 136 and the plurality of second clamping holes 137 along the circumferential direction of the retaining frame 13 may be equal spacing or unequal spacing, which is not limited here.

[0067] In some embodiments of the present invention, Figure 1 and 5 As shown, the one-way bearing 1 can be used in, including but not limited to, an electric bicycle reducer. For example, when used in an electric bicycle reducer, the outer ring 11 can be a planetary carrier, a baffle 19 is provided on the outer ring 11, a planetary gear mounting shaft 20 is provided on the baffle 19, and a planetary gear 21 is provided on the planetary gear mounting shaft 20.

[0068] Alternatively, if Figure 1 As shown, the baffle 19 is provided with a first hole 191 , the outer ring 11 is provided with a second hole 111 , and the planetary gear mounting shaft 20 passes through the first hole 191 and the second hole 111 .

[0069] Alternatively, if Figure 1 As shown, the number of the first hole 191, the second hole 111 and the planetary gear installation shaft 20 can be multiple. By providing multiple first holes 191, the second holes 111 and the planetary gear installation shaft 20, multiple planetary gears 21 can be installed.

[0070] Optionally, the first hole 191 and the second hole 111 include but are not limited to round holes, square holes, etc.

[0071] Other structures and operations of the one-way bearing 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0072] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0073] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A one-way bearing, characterized in that: include: Outer ring; An inner ring, wherein the inner ring is arranged inside the outer ring, and the inner ring and the outer ring together define an annular space; A retaining frame, wherein the retaining frame is arranged in the annular space, and a plurality of first containing grooves are provided on the retaining frame, wherein the plurality of first containing grooves are arranged at intervals along the circumferential direction of the inner ring, and a swingable wedge block is provided in the first containing groove, wherein the wedge block contacts the inner ring and forms a pressure angle with the inner ring, and the plurality of wedge blocks have at least two pressure angles.

2. The one-way bearing according to claim 1, characterized in that: The plurality of wedge blocks include a first wedge block and a second wedge block, wherein a pressure angle of the first wedge block is smaller than a pressure angle of the second wedge block.

3. The one-way bearing according to claim 2, characterized in that: The pressure angle of the first wedge block is α, wherein 3 degrees ≤ α < 4.5 degrees.

4. The one-way bearing according to claim 2 or 3, characterized in that: The pressure angle of the second wedge is β, wherein 4.5 degrees ≤ β ≤ 6 degrees.

5. The one-way bearing according to claim 2, characterized in that: The number of the first wedge blocks is less than or equal to the number of the second wedge blocks.

6. The one-way bearing according to any one of claims 1 to 5, characterized in that: The wedge blocks with the same pressure angle are arranged at intervals along the circumferential direction of the inner ring; or, the wedge blocks with different pressure angles among the multiple wedge blocks are arranged alternately in sequence along the circumferential direction of the inner ring; or, at least two wedge blocks with the same or different pressure angles are arranged between any two adjacent wedge blocks with the same pressure angle.

7. The one-way bearing according to claim 1, characterized in that: The one-way bearing further comprises an elastic member, wherein the elastic member is arranged on the retaining frame and the elastic member abuts against the wedge block.

8. The one-way bearing according to claim 7, characterized in that: The retaining frame is provided with a plurality of second containing grooves, the number of the second containing grooves is equal to and corresponds to the number of the first containing grooves, the second containing grooves are communicated with the corresponding first containing grooves, and the elastic member is provided in each of the second containing grooves.

9. The one-way bearing according to claim 1, characterized in that: The retaining frame is provided with a plurality of third containing grooves, which are arranged at intervals along the circumferential direction of the inner ring. Rolling bodies are arranged in the third containing grooves, and the rolling bodies are in rolling contact with the inner ring.

10. The one-way bearing according to claim 9, characterized in that: The retaining frame has a first end surface and a second end surface opposite to each other, the first receiving groove is arranged on the first end surface, and the third receiving groove is arranged on the second end surface.

11. The one-way bearing according to claim 10, characterized in that: The invention also includes a first sealing ring and a second sealing ring, wherein the first sealing ring cover is arranged on the first end surface, and the second sealing ring cover is arranged on the second end surface.

12. The one-way bearing according to claim 11, characterized in that: The first sealing ring, the second sealing ring and the retaining frame are all integrally formed injection molded parts. The first sealing ring and the retaining frame are connected by snapping, and the second sealing ring and the retaining frame are connected by buckling.

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