One-way clutch for electric vehicle

Abstract

The utility model discloses a one-way clutch for an electric vehicle, which belongs to the technical field of backstops and comprises two fixing rings, an outer ring and an inner ring, the outer ring and the inner ring are fastened between the two fixing rings through bolts and are concentrically arranged, and a pin roller and a special-shaped rolling body are distributed in a gap between the outer ring and the inner ring. The pin roller comprises a cylindrical roller and a first groove formed in the middle of the cylindrical roller; the special-shaped rolling body comprises a peach-shaped roller and a second groove formed in the peach-shaped roller. Radial movement can be avoided, the characteristic of an eccentric structure in the prior art is overcome, the problems of jamming and slipping can be reduced, more pin rollers and special-shaped rolling bodies can be distributed in the outer ring and the inner ring, stress of each special-shaped rolling body is uniform, in conclusion, the possibility of cracking is reduced, and the service life of the bearing is prolonged. Therefore, the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of backstops, in particular to a one-way clutch for electric vehicles. Background Technique

[0002] Roller type one-way clutches are commonly used in electric vehicles, using rollers to lock the outer ring and the inner ring to transmit power.

[0003] For the one-way clutch in the prior art, there needs to be a certain gap between the inner and outer rings during installation. When the minimum gap is 0.025, radial runout is likely to occur, affecting the acting force of the rollers, and it is prone to cracking and jamming. This device is an eccentric structure. If the cutting angle of the eccentric structure is too large or too small, jamming and slipping will occur. When the cutting angle is reasonable, there must be enough space between the inner and outer rings for the rollers. Therefore, the number distribution of the rollers is limited. Thus, each roller bears a large force during use and is prone to cracking.

[0004] Therefore, we propose a one-way clutch for electric vehicles to solve the problem of short service life caused by easy cracking as mentioned above.

[0005] The above information disclosed in this background technique is only used to increase the understanding of the background technique of the utility model. Therefore, it may include prior art that is not known to those of ordinary skill in the art. Content of the Utility Model

[0006] The purpose of the utility model is to provide a one-way clutch for electric vehicles to solve the problems in the current market proposed in the above background technique.

[0007] To achieve the above purpose, the utility model provides a one-way clutch for electric vehicles, including two fixed rings, and an outer ring and an inner ring that are fastened between the two fixed rings by bolts and are concentrically arranged. A plurality of rollers and special-shaped rolling bodies are arranged in the gap between the outer ring and the inner ring;

[0008] The roller includes a cylindrical roller and a first groove opened in the middle of the cylindrical roller;

[0009] The special-shaped rolling body includes a peach-shaped roller and a second groove opened on the peach-shaped roller. The peach-shaped roller also has an outer contact surface close to the outer ring and an inner contact surface close to the inner ring;

[0010] A ring spring is further arranged in the gap between the outer ring and the inner ring. The ring spring is located outside all the cylindrical rollers and the peach-shaped rollers and is located at the first groove and the second groove.

[0011] Preferably, the cylindrical rollers and the peach-shaped rollers are distributed at intervals in the gap between the outer ring and the inner ring.

[0012] Preferably, the clearance between the cylindrical roller and the outer ring and the inner ring is less than 0.01 mm.

[0013] Preferably, the fixing ring includes a ring body and a first circular opening formed in the ring body, and the diameter of the first circular opening is smaller than the diameter of the inner ring.

[0014] Preferably, the outer ring includes an outer sleeve ring, the outer sleeve ring is provided with a second circular opening, which is concentric with the first circular opening and has a diameter larger than that of the first circular opening;

[0015] The inner ring is arranged in the second circular opening.

[0016] Preferably, the inner ring includes an inscribed ring, and an installation opening is provided at the center of the inscribed ring;

[0017] The inscribed ring is arranged in the second circular opening, and the diameter of the installation opening is smaller than that of the first circular opening.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] (1) Through the design of the structure of the present utility model, a plurality of rollers and special-shaped rolling bodies can be distributed in the one-way clutch, so that the distance between the cylindrical roller and the outer ring and the inner ring can be less than 0.01 mm, thus avoiding radial runout, overcoming the characteristics of the eccentric structure of the prior art, reducing the problems of jamming and slipping, and a large number of rollers and special-shaped rolling bodies can be distributed in the outer ring and the inner ring, so that the force on each special-shaped rolling body is uniform. In summary, the possibility of cracking is reduced, and thus the service life is improved.

[0020] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present utility model will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is a schematic diagram of the installation of the outer ring, inner ring, roller and special-shaped rolling body of the present utility model;

[0023] Figure 3 is Figure 2 the top view of;

[0024] Figure 4 is a schematic diagram of the structure of the roller, special-shaped rolling body and annular spring of the present utility model.

[0025] In the figure: 1. Fixed ring; 2. Bolt; 3. Outer ring; 4. Inner ring; 5. Roller; 6. Special-shaped rolling element; 7. Annular spring;

[0026] 11. Ring body; 12. First circular opening;

[0027] 31. Outer sleeve ring; 32. Second circular opening;

[0028] 41. Inscribed ring; 42. Installation opening;

[0029] 51. Cylindrical roller; 52. First groove;

[0030] 61. Peach-shaped roller; 62. Second groove; 63. Outer contact surface; 64. Inner contact surface. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. It should be noted that the drawings are schematic and not drawn to scale. For the sake of clarity and convenience in the figure, the relative sizes and proportions of the parts shown in the figure are exaggerated or reduced in size for illustration, and any size is only exemplary and not limiting.

[0032] Please refer to Figures 1-4 , a one-way clutch for an electric vehicle, comprising: two fixed rings 1, and an outer ring 3 and an inner ring 4 fastened between the two fixed rings 1 by bolts 2 and arranged concentrically. A roller 5 and a special-shaped rolling element 6 are arranged in the gap between the outer ring 3 and the inner ring 4; the roller 5 includes a cylindrical roller 51 and a first groove 52 opened in the middle of the cylindrical roller 51; the special-shaped rolling element 6 includes a peach-shaped roller 61 and a second groove 62 opened in the peach-shaped roller 61. The peach-shaped roller 61 also has an outer contact surface 63 close to the outer ring 3 and an inner contact surface 64 close to the inner ring 4; an annular spring 7 is also arranged in the gap between the outer ring 3 and the inner ring 4. The annular spring 7 is located outside all the cylindrical rollers 51 and the peach-shaped rollers 61 and is located at the first groove 52 and the second groove 62. The cylindrical rollers 51 and the peach-shaped rollers 61 are distributed at intervals in the gap between the outer ring 3 and the inner ring 4, and the gap between the cylindrical roller 51 and the outer ring 3 and the inner ring 4 is less than 0.01 mm.

[0033] By adopting the above technical solution, the clearance between the cylindrical roller 51 and the outer ring 3 and the inner ring 4 is within 0.01 mm, preventing radial runout. Moreover, the above structure overcomes the drawback in the prior art that the rollers require a relatively large amount of space. Therefore, multiple cylindrical rollers 51 and peach-shaped rollers 61 can be installed, improving the eccentric structure of the one-way clutch in the prior art. As a result, jamming and slipping can be avoided. Thus, all the peach-shaped rollers 61 have the same acting force and the same deflection angle, with uniform stress and uniform wear, effectively extending its service life and preventing cracking.

[0034] In the above technical solution, when the outer sleeve ring 31 and the inner connecting ring 41 are in transmission, the inner contact surface 64 is clamped with the inner connecting ring 41, so they can rotate simultaneously. When rotating in the opposite direction, there is a certain clearance between the inner connecting ring 41 and the inner contact surface 64, so the rotation of the outer sleeve ring 31 will not drive the rotation of the inner connecting ring 41.

[0035] Among them, the fixing ring 1 includes a ring body 11 and a first circular opening 12 formed in the ring body 11. The diameter of the first circular opening 12 is smaller than the diameter of the inner ring 4. The outer ring 3 includes an outer sleeve ring 31. The outer sleeve ring 31 is provided with a second circular opening 32, which is concentric with the first circular opening 12 and has a diameter larger than that of the first circular opening 12. The inner ring 4 is arranged in the second circular opening 32. The inner ring 4 includes an inner connecting ring 41. An installation opening 42 is provided at the center of the inner connecting ring 41. The inner connecting ring 41 is arranged in the second circular opening 32, and the diameter of the installation opening 42 is smaller than that of the first circular opening 12.

[0036] By adopting the above technical solution, it can ensure that the cylindrical roller 51 and the peach-shaped roller 61 are stably installed between the outer sleeve ring 31 and the inner connecting ring 41.

[0037] In this embodiment, the ratio of the rollers 5 to the special-shaped rolling elements 6 is 1:2, and one roller 5 is arranged every two special-shaped rolling elements 6.

[0038] Working principle: When the outer ring 3 rotates in one direction and the inner ring 4 remains stationary, there is a certain clearance between the inner connecting ring 41 and the inner contact surface 64 of the peach-shaped roller 61. When the outer ring 3 rotates in the other direction, the inner contact surface 64 of the peach-shaped roller 61 will be clamped with the inner connecting ring 41, thus driving the peach-shaped roller 61 to rotate simultaneously.

[0039] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0040] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0041] In the present utility model, unless otherwise clearly defined and limited, the terms such as "installed", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0043] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not have to be directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0044] In the attached drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other.

[0045] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A one-way clutch for an electric vehicle, comprising two fixed rings (1), and an outer ring (3) and an inner ring (4) fastened between the two fixed rings (1) by bolts (2), and being concentrically arranged, characterized in that, Rollers (5) and special-shaped rolling elements (6) are arranged in the gap between the outer ring (3) and the inner ring (4); The roller (5) includes a cylindrical roller (51) and a first groove (52) formed in the middle of the cylindrical roller (51); The special-shaped rolling element (6) includes a peach-shaped roller (61) and a second groove (62) formed in the peach-shaped roller (61). The peach-shaped roller (61) also has an outer contact surface (63) close to the outer ring (3) and an inner contact surface (64) close to the inner ring (4); An annular spring (7) is further arranged in the gap between the outer ring (3) and the inner ring (4). The annular spring (7) is located on the periphery of all the cylindrical rollers (51) and the peach-shaped rollers (61) and is located at the first groove (52) and the second groove (62).

2. The one-way clutch for an electric vehicle according to claim 1, wherein: The cylindrical rollers (51) and the peach-shaped rollers (61) are distributed at intervals in the gap between the outer ring (3) and the inner ring (4).

3. The one-way clutch for an electric vehicle according to claim 1, characterized in that: The gap between the cylindrical roller (51) and the outer ring (3) and the inner ring (4) is less than 0.01 mm.

4. The one-way clutch for an electric vehicle according to claim 1, wherein: The fixing ring (1) includes a ring body (11) and a first circular opening (12) formed in the ring body (11). The diameter of the first circular opening (12) is smaller than the diameter of the inner ring (4).

5. The one-way clutch for an electric vehicle according to claim 4, characterized in that: The outer ring (3) includes an outer sleeve ring (31). The outer sleeve ring (31) is provided with a second circular opening (32), which is concentric with the first circular opening (12) and has a diameter larger than that of the first circular opening (12); The inner ring (4) is arranged in the second circular opening (32).

6. The one-way clutch for an electric vehicle according to claim 5, wherein: The inner ring (4) includes an inscribed ring (41), and an installation opening (42) is provided at the center of the inscribed ring (41); The inscribed ring (41) is arranged in the second circular opening (32), and the diameter of the installation opening (42) is smaller than that of the first circular opening (12).

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