Bearing integrated flywheel

Abstract

The utility model discloses a bearing integrated flywheel, and relates to the technical field of bicycle accessories, the bearing integrated flywheel comprises an inner ring, an outer ring retainer and a plurality of rolling bodies, and the rolling bodies are clamped between the inner ring and the outer ring and embedded in the outer ring and / or the inner ring; the retainer is arranged between the outer ring and the inner ring, the rolling bodies are arranged at equal intervals through the retainer, and the rolling bodies are embedded in the retainer. The flywheel has the effects that the service life of the balls is prolonged, and the running reliability and stability of the flywheel are improved.

Description

Technical Field

[0001] The present application relates to the technical field of bicycle accessories, and in particular to a bearing-integrated flywheel. Background Art

[0002] A bicycle flywheel is a round metal disk with a toothed ring on the outer wall of the metal disk, which meshes with the bicycle chain. When the pedals are turned, the chain drives the flywheel to rotate, thereby driving the bicycle forward. The bicycle flywheel is an important part of the bicycle drive system, and its structural design and performance directly affect the riding experience and use effect of the bicycle.

[0003] A bicycle flywheel in the related art includes an inner ring, an outer ring and a plurality of balls rollingly arranged between the inner ring and the outer ring; a gear ring is coaxially fixedly connected to the outer wall of the outer ring; a plurality of ratchets are arranged on the inner wall of the outer ring around its rotation axis; the inner ring is rotatably connected to the outer ring through a bearing; the inner ring is rotatably connected to a pawl cooperating with the ratchet; a spring is connected between the pawl and the inner ring.

[0004] The gear ring meshes with the bicycle chain, and the inner ring is coaxially fixedly connected to the rear wheel. When the bicycle pedals are turned, the chain drives the outer ring to rotate. Due to the cooperation between the ratchet and the pawl, the outer ring drives the rear wheel to rotate through the inner ring, thereby driving the bicycle forward. When the bicycle stops turning the pedals during driving, the outer ring stops rotating, and the rear wheel of the bicycle drives the inner ring to rotate relative to the outer ring. The ball can reduce the friction between the inner ring and the outer ring, thereby improving the transmission efficiency between the inner ring and the outer ring.

[0005] However, bicycles often encounter bumpy roads during driving, which can cause the balls to fail due to mutual collision between the inner and outer rings. Utility Model Content

[0006] In order to increase the service life of the balls and improve the reliability and stability of the flywheel operation, the present application provides a bearing-integrated flywheel.

[0007] The present application provides a bearing-integrated flywheel, which adopts the following technical solution:

[0008] A bearing-integrated flywheel, comprising:

[0009] Inner and outer rings;

[0010] A plurality of rolling elements, clamped between the inner ring and the outer ring, and embedded in the outer ring and / or the inner ring;

[0011] A retainer is provided between the outer ring and the inner ring, a plurality of rolling elements are provided at equal intervals through the retainer, and the rolling elements are embedded in the retainer.

[0012] By adopting the above technical solution, the retaining frame allows multiple rolling elements to be arranged at equal intervals, thereby reducing the collision between the multiple rolling elements when they rotate, thereby extending the service life of the rolling elements and improving the stability and reliability of the flywheel operation. The rolling elements are clamped between the inner ring and the outer ring and embedded in the outer ring or the inner ring, which can reduce the shaking of the rolling elements relative to the inner ring and the outer ring when rolling, thereby reducing the collision between the rolling elements and the inner ring and / or the outer ring, and further improving the service life of the rolling elements and the stability and reliability of the flywheel operation.

[0013] Optionally, the retaining frame includes a first retaining frame and a second retaining frame, the rolling body is clamped between the first retaining frame and the second retaining frame, and the first retaining frame and the second retaining frame are detachably connected.

[0014] By adopting the above technical solution, when assembling the rolling elements and the retaining frame, the first retaining frame and the second retaining frame are disassembled, and then a plurality of rolling elements are placed between the first retaining frame and the second retaining frame, and then the first retaining frame and the second retaining frame are assembled, so that the rolling elements are easily embedded in the retaining frame.

[0015] Optionally, a first installation gap and a second installation gap that are interconnected are formed between the inner ring and the outer ring, a pawl and a plurality of ratchet teeth are arranged inside the first installation gap, the pawl is meshed with the ratchet teeth, the ratchet teeth are fixedly connected to the outer ring, the pawl is rotatably connected to the inner ring, an elastic member is connected between the pawl and the inner ring, and the rolling body and the retaining frame are arranged inside the second installation gap;

[0016] The outer ring is provided with an oiling nozzle, and the oiling nozzle is communicated with the first installation gap.

[0017] By adopting the above technical solution, the first installation gap and the second installation gap are connected, so that the operator can inject lubricant into the second installation gap through the oiling nozzle, and there is no hole in the inner wall of the outer ring at the second installation gap, which reduces the stress concentration when the rolling body abuts against the inner wall of the outer ring, thereby reducing the situation where the inner wall of the outer ring cracks or breaks and fails.

[0018] Optionally, the retaining frame is provided with a plurality of oil guide plates around its rotation axis, and the oil guide plates are inserted into the first installation gap.

[0019] By adopting the above technical solution, after the lubricant or lubricant is injected into the first installation gap through the oiling nozzle, the inner ring is rotated so that the lubricant moves to the oil guide plate in a direction away from the rotation axis of the inner ring under the action of centrifugal force, and then flows along the oil guide plate to the retaining frame and the rolling body, thereby facilitating the lubrication of the rolling body.

[0020] Optionally, the angle between the oil guide plate and the rotation axis of the retaining frame is an acute angle.

[0021] By adopting the above technical solution, after the inner ring is rotated so that the lubricant moves to the oil guide plate under the action of centrifugal force, the lubricant can move along the oil guide plate toward the cage to the cage, thereby increasing the amount of lubricant moving to the cage.

[0022] Optionally, the oil guide plate is provided with an oil guide groove, and when the inner ring rotates, the oil guide groove is used to guide the lubricant thrown onto the oil guide plate to the retaining frame.

[0023] By adopting the above technical solution, when the inner ring rotates, the lubricant is thrown into the oil guide groove of the oil guide plate under the action of centrifugal force, and the lubricant flows along the oil guide groove to the cage, thereby increasing the amount of lubricant transported to the cage.

[0024] Optionally, an oil inlet hole is provided on a side wall of the retaining frame in which the rolling body is embedded, and the oil inlet hole is provided on a side of the oil guide plate close to the rotation axis of the retaining frame.

[0025] By adopting the above technical solution, after the lubricant flows from the oil guide plate to the retaining frame, it can flow from the oil inlet hole to the rolling element, thereby increasing the amount of lubricant attached to the rolling element.

[0026] Optionally, the oil inlet hole is strip-shaped.

[0027] By adopting the above technical solution, the strip-shaped oil inlet hole can increase the amount of lubricant flowing to the rolling element through the oil inlet hole.

[0028] In summary, the present application includes at least one of the following beneficial effects:

[0029] 1. The cage allows multiple rolling elements to be arranged at equal intervals, thereby reducing the collision between multiple rolling elements when they rotate, thereby extending the service life of the rolling elements and improving the stability and reliability of the flywheel operation. The rolling elements are clamped between the inner ring and the outer ring and embedded in the outer ring or the inner ring, which can reduce the shaking of the rolling elements relative to the inner ring and the outer ring when rolling, thereby reducing the collision between the rolling elements and the inner ring and / or the outer ring, further improving the service life of the rolling elements and the stability and reliability of the flywheel operation;

[0030] 2. The first installation gap and the second installation gap are connected, so that the operator can inject lubricant into the second installation gap through the grease nozzle, and there is no hole in the inner wall of the outer ring at the second installation gap, which reduces the stress concentration when the rolling element abuts against the inner wall of the outer ring, thereby reducing the situation where the inner wall of the outer ring cracks or breaks and fails;

[0031] 3. After injecting lubricant or lubricant into the first installation gap through the oiling nozzle, the inner ring is rotated so that the lubricant moves to the oil guide plate in a direction away from the rotation axis of the inner ring under the action of centrifugal force, and then flows along the oil guide plate to the cage and the rolling element, thereby facilitating lubrication of the rolling element;

[0032] 4. After the inner ring is rotated so that the lubricant moves to the oil guide plate under the action of centrifugal force, the lubricant can move along the oil guide plate toward the cage to the cage, thereby increasing the amount of lubricant moving to the cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application;

[0034] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0035] Figure 3 It is a schematic diagram of a partial structure of a pawl for showing the first embodiment of the present application;

[0036] Figure 4 It is a partial structural diagram of the second embodiment of the present application;

[0037] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure at the middle BB;

[0038] Figure 6 yes Figure 5 A schematic diagram of the local enlarged structure at C in the middle;

[0039] Figure 7 It is a schematic cross-sectional structure diagram of the third embodiment of the present application.

[0040] Explanation of the accompanying drawings: 2. Inner ring; 3. Outer ring; 4. Rolling body; 5. Cage; 51. First cage; 52. Second cage; 6. First mounting gap; 7. Second mounting gap; 8. Paw; 9. Ratchet; 10. Elastic member; 11. Oil nozzle; 12. Oil guide plate; 13. Oil guide groove; 14. Oil inlet hole; 15. First annular groove; 16. Second annular groove; 17. First sealing ring; 18. Second sealing ring; 19. Gear ring; 20. Mounting hole. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-6 This application is described in further detail.

[0042] Embodiment 1:

[0043] A bearing-integrated flywheel disclosed in the embodiment of the present application, referring to Figure 1 and Figure 2The bearing-integrated flywheel comprises an inner ring 2 and an outer ring 3 arranged coaxially, and a first installation gap 6 is formed between the inner ring 2 and the outer ring 3, and the first installation gap 6 is annular. A gear ring 19 is fixedly connected to the outer wall of the outer ring 3, and a plurality of ratchet teeth 9 are arranged on the inner wall of the outer ring 3 around its rotation axis, and the ratchet teeth 9 are located inside the first installation gap 6. A mounting hole 20 is coaxially opened along the direction of its rotation axis of the inner ring 2, and a ratchet 8 meshing with the ratchet teeth 9 is rotatably connected to the outer wall of the inner ring 2 around its rotation axis, and the ratchet 8 is located inside the first installation gap 6, and the rotation axis of the ratchet 8 is parallel to the rotation axis of the inner ring 2, and an elastic member 10 is fixedly connected between the ratchet 8 and the inner ring 2.

[0044] Reference Figure 2 and Figure 3 A second installation gap 7 is formed between the outer ring 3 and the inner ring 2. The second installation gap 7 is annular and is coaxially arranged in parallel with the first installation gap 6. The second installation gap 7 is located on one side of the first installation gap 6 and is connected to the first installation gap 6. A first annular groove 15 is coaxially opened on the inner wall of the outer ring 3 inside the second installation gap 7, and a second annular groove 16 is coaxially opened on the outer wall of the inner ring 2 inside the second installation gap 7. The inner wall of the second annular groove 16 and the inner wall of the first annular groove 15 sandwich a plurality of rolling elements 4, so that the rolling elements 4 are embedded between the inner ring 2 and the outer ring 3. A retainer 5 is arranged inside the second installation gap 7. A plurality of rolling elements 4 are arranged at equal intervals through the retainer 5. The rolling elements 4 are embedded in the retainer 5. The retainer 5 includes a first retainer 51 and a second retainer 52 that are detachably connected. The first retainer 51 is detachably connected by screws or pins.

[0045] The inner ring 2 is coaxially fixedly connected to the rear wheel of the bicycle, and the toothed ring 19 of the outer ring 3 is meshed with the chain of the bicycle. During riding, when the bicycle pedal is stepped on, the pedal drives the outer ring 3 to rotate through the matching relationship between the chain and the toothed ring 19, and the outer ring 3 drives the inner ring 2 to rotate through the meshing ratchet 9 and the pawl 8, and the inner ring 2 drives the rear wheel to rotate, thereby driving the bicycle forward. During the forward movement of the bicycle, when the pedal is stopped so that the outer ring 3 stops rotating, the rear wheel drives the inner ring 2 to rotate, and the elastic member 10 enables the pawl 8 to rotate in the opposite direction relative to the ratchet 9, so that the inner ring 2 can rotate relative to the outer ring 3, that is, the rear wheel can still rotate when the pedal is stopped.

[0046] When the inner ring 2 rotates relative to the outer ring 3, the rolling element 4 can reduce the friction between the inner ring 2 and the outer ring 3. The rolling element 4 is embedded between the inner ring 2 and the outer ring 3, and the inner wall of the first annular groove 15 and the inner wall of the second annular groove 16 jointly clamp the rolling element 4, which can reduce the shaking of the rolling element 4 and the collision with the inner wall of the first annular groove 15 or the inner wall of the second annular groove 16, thereby increasing the service life of the rolling element 4 and improving the stability and reliability of the flywheel operation.

[0047] The retaining frame 5 allows the plurality of rolling elements 4 to be arranged at equal intervals, which can reduce the collision between the rolling elements 4, thereby further increasing the service life of the rolling elements 4 and improving the stability and reliability of the flywheel operation.

[0048] Reference Figure 1 and Figure 2 A first sealing ring 17 and a second sealing ring 18 are installed between the inner ring 2 and the outer ring 3. The first sealing ring 17 and the second sealing ring 18 are used to close the first installation gap 6 and the second installation gap 7, thereby reducing dust, water and other impurities entering the first installation gap 6 and the second installation gap 7, extending the service life of the flywheel, and improving the smoothness of the inner ring 2 and the outer ring 3 when rotating.

[0049] The implementation principle of a bearing-integrated flywheel in the embodiment of the present application is as follows: the retaining frame 5 allows multiple rolling bodies 4 to be arranged at equal intervals, thereby reducing the collision between multiple rolling bodies 4 when rotating, thereby extending the service life of the rolling bodies 4 and improving the stability and reliability of the flywheel operation. The rolling bodies 4 are clamped between the inner ring 2 and the outer ring 3 and embedded in the outer ring 3 or the inner ring 2, which can reduce the shaking of the rolling bodies 4 relative to the inner ring 2 and the outer ring 3 when rolling, thereby reducing the collision between the rolling bodies 4 and the inner ring 2 and / or the outer ring 3, further improving the service life of the rolling bodies 4 and the stability and reliability of the flywheel operation. In addition, the bearing is integrated into the flywheel, making the bicycle transmission structure simple and compact, and the manufacturing cost is low.

[0050] Embodiment 2:

[0051] The difference between the present embodiment and other embodiments is that Figure 4 The outer ring 3 at the first installation gap 6 is equipped with an oiling nozzle 11.

[0052] Reference Figure 5 and Figure 6 , a plurality of oil guide plates 12 are fixedly connected to one side of the retainer 5 facing the first installation gap 6, and the plurality of oil guide plates 12 are arranged around the rotation axis of the retainer 5, and the oil guide plates 12 are arranged one by one with the rolling elements 4, and the oil guide plates 12 are arranged obliquely to the rotation axis of the retainer 5 and gradually approach the rotation axis of the retainer 5 in a direction away from the rolling elements 4, so that the angle between the oil guide plates 12 and the rotation axis of the retainer 5 is an acute angle, and one end of the oil guide plate 12 is inserted into the first installation gap 6. The length direction of the oil guide plate 12 is set to be oblique to the rotation axis of the retainer 5 and gradually approach the rotation axis of the retainer 5 in a direction away from the rolling elements 4. A plurality of oil guide grooves 13 are arranged in parallel on one side wall of the oil guide plate 12 facing the rotation axis of the retainer 5, and the oil guide grooves 13 are opened along the length direction of the oil guide plate 12.

[0053] Reference Figure 6A plurality of oil inlet holes 14 are provided on a side wall of the retainer 5 facing the first installation gap 6 . The plurality of oil inlet holes 14 are arranged around the rotation axis of the retainer 5 . The oil inlet holes 14 are strip-shaped and are provided on a side of the oil guide plate 12 close to the inner ring 2 .

[0054] Lubricant is injected into the first installation gap 6 through the oiling nozzle 11 so that the lubricant adheres to the outer wall of the inner ring 2. The lubricant can be lubricating oil or grease. Then the inner ring 2 is rotated. The lubricant is thrown to the inner wall of the oil introduction groove 13 under the action of centrifugal force and moves along the oil introduction groove 13 toward the direction close to the retaining frame 5. After the rotation of the inner ring 2 stops, the lubricant moves along the retaining frame 5 to the oil inlet hole 14 and adheres to the rolling element 4 through the oil inlet hole 14.

[0055] The oiling nozzle 11 is arranged on the outer ring 3 of the first installation gap 6, and there is no need to drill a hole on the first ring groove 15, which reduces the stress concentration in the first ring groove 15 when the rolling body 4 rolls, thereby reducing the occurrence of cracks or breakage on the inner wall of the outer ring 3 and causing failure, thereby increasing the service life of the flywheel.

[0056] The angle between the oil guide plate 12 and the rotation axis of the retaining frame 5 is an acute angle, which enables the lubricant to move toward the retaining frame 5 under the action of centrifugal force when the inner ring 2 rotates. The oil guide groove 13 limits the movement direction of the lubricant on the oil guide plate 12, thereby guiding the lubricant to the retaining frame 5, thereby increasing the amount of lubricant transported to the retaining frame 5.

[0057] The oil inlet hole 14 can facilitate the lubricant to adhere to different positions of the rolling element 4, thereby improving the lubricating effect of the lubricant on the rolling element 4. The strip-shaped oil inlet hole 14 can increase the amount of lubricant adhering to the rolling element 4 through the oil inlet hole 14.

[0058] Embodiment three:

[0059] The difference between the present embodiment and other embodiments is that Figure 7 The pawl 8 is provided with a double-layer structure, the elastic member 10 is an elastic disconnected metal ring, and the elastic member 10 is sleeved on the outer wall of the pawl 8. The rolling body 4 is a ball, and the rolling body 4 is clamped between the inner ring 2 and the outer ring 3 and embedded in the inner ring 2 and the outer ring 3.

[0060] By providing the double-layer structure of the pawl 8, the contact area between the pawl 8 and the ratchet 9 can be increased, thereby improving its ability to withstand impact under bumpy road conditions. The double-layer structure can be designed to support each other to disperse and absorb impact force.

[0061] The balls are clamped between the inner ring 2 and the outer ring 3, and embedded in the inner ring 2 and the outer ring 3, which can ensure the stability of the balls inside the flywheel and reduce the displacement or falling of the balls caused by bumps, thereby improving the durability and transmission efficiency of the flywheel.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bearing-integrated flywheel, characterized in that: include: Inner ring (2) and outer ring (3); a plurality of rolling elements (4), clamped between the inner ring (2) and the outer ring (3), and embedded in the outer ring (3) and / or the inner ring (2); A retaining frame (5), wherein the retaining frame (5) is arranged between the outer ring (3) and the inner ring (2), a plurality of rolling elements (4) are arranged at equal intervals through the retaining frame (5), and the rolling elements (4) are embedded in the retaining frame (5).

2. A bearing-integrated flywheel according to claim 1, characterized in that: The retaining frame (5) comprises a first retaining frame (51) and a second retaining frame (52); the rolling body (4) is clamped between the first retaining frame (51) and the second retaining frame (52); the first retaining frame (51) and the second retaining frame (52) are detachably connected.

3. The bearing-integrated flywheel according to claim 1, characterized in that: A first installation gap (6) and a second installation gap (7) which are connected to each other are formed between the inner ring (2) and the outer ring (3); a pawl (8) and a plurality of ratchet teeth (9) are arranged inside the first installation gap (6); the pawl (8) is meshed with the ratchet teeth (9); the ratchet teeth (9) are fixedly connected to the outer ring (3); the pawl (8) is rotatably connected to the inner ring (2); an elastic member (10) is connected between the pawl (8) and the inner ring (2); and the rolling element (4) and the retaining frame (5) are arranged inside the second installation gap (7); The outer ring (3) is provided with a grease nozzle (11), the grease nozzle (11) is in communication with the first installation gap (6), and the grease nozzle (11) is used to inject lubricant into the first installation gap (6).

4. The bearing-integrated flywheel according to claim 3, characterized in that: The retaining frame (5) is provided with a plurality of oil guide plates (12) around its rotation axis, and the oil guide plates (12) are inserted into the first installation gap (6).

5. The bearing-integrated flywheel according to claim 4, characterized in that: The angle between the oil guide plate (12) and the rotation axis of the retaining frame (5) is an acute angle.

6. The bearing-integrated flywheel according to claim 4, characterized in that: The oil guide plate (12) is provided with an oil guide groove (13). When the inner ring (2) rotates, the oil guide groove (13) is used to guide the lubricant thrown onto the oil guide plate (12) to the retaining frame (5).

7. The bearing-integrated flywheel according to claim 4, characterized in that: An oil inlet hole (14) is provided on the side wall of the retaining frame (5) in which the rolling body (4) is embedded. The oil inlet hole (14) is provided on a side of the oil guide plate (12) close to the rotation axis of the retaining frame (5).

8. The bearing-integrated flywheel according to claim 7, characterized in that: The oil inlet hole (14) is strip-shaped.

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