Clutch structure and internal transmission

Abstract

The utility model relates to the technical field of inner transmissions, and discloses a clutch structure which comprises an inner ring and an outer ring sleeved on the outer side of the inner ring, a clutch assembly is arranged between the inner ring and the outer ring, the outer ring can be fixed relative to the inner ring or rotate around a rotating shaft in a single direction, and the clutch assembly comprises a retainer and a return elastic part. The bearing is characterized by further comprising a supporting ring, the supporting ring is arranged at one end of the inner side of the inner ring, the supporting ring and the inner ring are relatively fixed, and a return elastic part is arranged between the supporting ring and the retainer and used for returning the retainer. The supporting ring is arranged at one end of the inner side of the inner ring, the supporting ring is fixedly connected with the inner ring, the supporting ring and the inner ring are relatively fixed, the return elastic part is arranged between the supporting ring and the retainer and used for returning the retainer, the retainer, the inner ring and the supporting ring are sequentially arranged from outside to inside, and the axial length of the inner transmission is reduced through the overall structure. The utility model further discloses an inner transmission comprising the clutch structure.

Description

Technical Field

[0001] The utility model relates to the technical field of internal transmissions, in particular to a clutch structure and an internal transmission. Background Art

[0002] The clutch of the traditional internal transmission has a return elastic member to provide preload force for the clutch to prevent the clutch from being out of working state. However, the return elastic member of the traditional clutch is located outside the planet carrier, which increases the axial length of the internal transmission, occupies a large space, and is not conducive to miniaturization.

[0003] Therefore, it is necessary to propose a new clutch structure and internal transmission to solve the above problems, and to solve the problem that the return elastic member of the traditional clutch is located outside the planetary carrier, resulting in a long axial length of the internal transmission, occupying a large space and not being conducive to miniaturization. Summary of the invention

[0004] The utility model provides a clutch structure and an internal transmission, which solve the problem that the return elastic member of the traditional clutch is located outside the planet carrier, resulting in a long axial length of the internal transmission, occupying a large space and being unfavorable for miniaturization.

[0005] The technical problem solved by the utility model is achieved by the following technical solutions:

[0006] A clutch structure comprises an inner ring and an outer ring sleeved on the outer side of the inner ring, a clutch assembly is arranged between the inner ring and the outer ring, the outer ring can be fixed relative to the inner ring or unidirectionally rotate around a rotation axis, the clutch assembly comprises a retaining frame and a return elastic member, and is characterized in that it also comprises a support ring, the support ring is arranged at one end of the inner side of the inner ring, the support ring is relatively fixed to the inner ring, and a return elastic member is arranged between the support ring and the retaining frame for returning the retaining frame.

[0007] The retaining frame is provided with a boss, and one end of the inner ring is provided with a clearance opening that runs through the outer side and the inner side of the inner ring, and the boss passes through the clearance opening to the inside of the inner ring; one end of the return elastic piece is fixed on the boss, and the other end of the return elastic piece is fixed on the support ring.

[0008] The support ring is provided with a notch penetrating the inner side and the outer side of the support ring, and the boss passes through the notch.

[0009] A stopper for shielding the outer side of the boss is provided on one side of the notch.

[0010] The boss is provided with a step for avoiding the stopper.

[0011] A fixing block extending inward is arranged on the inner side of the support ring, and a through hole is arranged on the fixing block and the boss respectively, and two ends of the return elastic member are respectively fixed on the through holes.

[0012] On the inner side of the support ring, there is a retaining edge for preventing the bearing from moving axially away from the inner ring.

[0013] On the inner side of the inner ring, there is a recess, and on the outer side of the support ring, there is a clamping block clamped in the recess.

[0014] The clutch assembly further includes a number of first rollers. On the outer side of the inner ring, there are a number of grooves that match the sides of the first rollers. The clutch assembly has an opening that runs through the clutch assembly for accommodating the rollers. When the inner ring and the outer ring rotate relative to each other, the first rollers always rotate within the grooves.

[0015] The clutch assembly further includes a number of second rollers and a number of slopes on the outer side of the inner ring corresponding to the positions of the second rollers. On the cage, there are a number of roller grooves for accommodating the second rollers.

[0016] The first rollers and the second rollers are on the same plane.

[0017] An internal transmission includes the above clutch structure.

[0018] The inner ring is a planet carrier, and the outer ring is an internal gear ring.

[0019] The beneficial effects of the present utility model are:

[0020] In the present utility model, by arranging the support ring at one end of the inner side of the inner ring and fixedly connecting the support ring to the inner ring, the support ring and the inner ring are relatively fixed. A return elastic member is arranged between the support ring and the cage for the cage to return. The cage, the inner ring, and the support ring are arranged in sequence from outside to inside, and the return elastic member is located inside the inner ring between the cage and the support ring, thus reducing the axial length of the internal transmission as a whole. Description of the Drawings

[0021] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a three-dimensional view of the internal transmission of the present utility model.

[0023] Figure 2 It is a cross-sectional view of the internal transmission of the present utility model.

[0024] Figure 3 It is a structural schematic diagram of the clutch structure of the present utility model.

[0025] Figure 4This is an exploded view of the clutch structure of the present utility model.

[0026] Figure 5 This is a cross-sectional view of the inner and outer rings of the clutch structure of the present utility model when they rotate relative to each other.

[0027] Figure 6 This is a cross-sectional view of the inner and outer rings of the clutch structure of the present utility model when they are relatively fixed.

[0028] Figure 7 This is a schematic structural diagram of the inner ring of the present utility model.

[0029] Figure 8 This is a schematic structural diagram of the cage of the present utility model.

[0030] Figure 9 This is a schematic structural diagram of the support ring of the present utility model.

[0031] Wherein:

[0032] 1 - inner ring, 10 - notch, 11 - relief opening, 12 - recess, 13 - groove, 14 - slope,

[0033] 2 - outer ring,

[0034] 3 - support ring, 30 - convex block, 31 - notch, 32 - stop block, 33 - fixing block, 34 - retaining edge, 35 - locking block,

[0035] 4 - cage, 41 - boss, 42 - step, 43 - opening, 4 - roller groove,

[0036] 5 - return elastic member, 50 - through hole,

[0037] 6 - first roller, 7 - second roller,

[0038] 100 - clutch assembly, 200 - bearing, 300 - input member, 400 - mandrel, 500 - shift assembly, 600 - sun gear, 700 - planetary gear, 800 - output member. Detailed implementation manner

[0039] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below with reference to specific drawings.

[0040] See Figures 1 to 9, a clutch structure, comprising an inner ring 1 and an outer ring 2 sleeved outside the inner ring 1. A clutch assembly 100 is arranged between the inner ring 1 and the outer ring 2. The outer ring 2 can be fixed relative to the inner ring 1 or rotate unidirectionally around the rotation axis. The clutch assembly 100 includes a cage 4 and a return elastic member 5, and further includes a support ring 3. The support ring 3 is arranged at one end inside the inner ring 1. The support ring 3 is relatively fixed to the inner ring 1. A return elastic member 5 is arranged between the support ring 3 and the cage 4 for the return of the cage 4. The cage 4, the inner ring 1, and the support ring 3 are arranged in sequence from outside to inside. The return elastic member 5 is located between the cage and the support ring, and the overall structure reduces the axial length of the inner transmission.

[0041] Preferably, the support ring 3 and the inner ring 1 are mutually inlaid by a convex block 30 and a notch 10 to prevent the support ring 3 from rotating around the axis direction and moving towards the inner ring direction.

[0042] During use, a bearing 200 is sleeved inside the support ring 3. The bearing 200 indirectly supports the inner ring 1 through the support ring 3. Since the support ring 3 and the inner ring 1 are mutually inlaid by the convex block 30 and the notch 10, it is possible to avoid the support ring 3 rotating around the axis direction and moving the inner ring 1 towards the inner ring direction. The inner ring 1 is more stable during the rotation process, will not shift, and rotates smoothly.

[0043] Specifically, in the first gear, the pawl on the core shaft 400 retracts, and the corresponding sun gear 600 and planet gear 700 rotate freely. When the input member 300 inputs torque, it first passes through the inner ring 1. The rotational speed of the inner ring 1 is higher than that of the outer ring 2. Then the clutch assembly 100 engages, making the rotational speeds of the inner ring 1 and the outer ring 2 synchronous. The torque of the inner ring 1 is transmitted to the outer ring 2, and is output to the wheel by the outer ring 2 through the output member 800. At this time, the inner transmission does not shift through the planetary gear mechanism.

[0044] In other gears, one of the sun gears 600 is locked. When the input member 300 inputs torque, it first passes through the inner ring 1. The inner ring 1 rotates to drive the planet gear 700 to rotate. One of the sun gears 600 meshes with the planet gear 700, making the rotational speed of the outer ring 2 higher than that of the inner ring 1. At this time, the clutch assembly 100 disengages, and the torque of the outer ring 2 is output to the wheel through the output member 800. At this time, the inner transmission shifts through the planetary gear mechanism.

[0045] Preferably, the notch 10 is arranged at the edge of the inner ring 1, and the convex block 30 is arranged on the side of the support ring 3 away from the inner ring 1.

[0046] The clutch assembly 100 includes a retaining frame 4 and a return elastic member 5. The retaining frame 4 is provided with a boss 41. One end of the inner ring 1 is provided with a clearance opening 11 that penetrates the outer side and the inner side of the inner ring 1. The boss 41 passes through the clearance opening 11 to the inside of the inner ring 1. One end of the return elastic member 5 is fixed on the boss 41, and the other end of the return elastic member 5 is fixed on the support ring 3. The clearance opening 11 allows the boss 41 to penetrate into the inner ring 1, hiding the boss 41, and can provide a rotation space for the boss 41 when the retaining frame 4 and the inner ring rotate relative to each other. The return elastic member 5 provides a pre-tightening force for the clutch assembly 100 to prevent the clutch assembly 100 from being out of the working state. Preferably, the return elastic member 5 is a tension spring.

[0047] The support ring 3 is provided with a notch 31 penetrating the inner and outer sides of the support ring 3, and the boss 41 passes through the notch 31. The notch 31 can further provide a rotation space for the boss 41 when the retainer 4 and the inner ring rotate relative to each other.

[0048] A stopper 32 is provided on one side of the notch 31 to block the outer side of the boss 41. The stopper 32 can further hide the return elastic member 5, and can isolate the return elastic member 5 from other components without interfering with each other.

[0049] The boss 41 is provided with a step 42 for avoiding the stopper 32. The step 42 can further provide a rotation space for the boss 41 when the retainer 4 and the inner ring rotate relative to each other.

[0050] The inner side of the support ring 3 is provided with a fixing block 33 extending inward, and each of the fixing block 33 and the boss 41 is provided with a through hole 50, and both ends of the return elastic member 5 are respectively fixed on the through holes 50. The through holes 50 can provide a fixing position for the tension spring.

[0051] The inner side of the support ring 3 is provided with a rib 34 for preventing the bearing from moving axially away from the inner ring 1. The rib 34 can prevent the bearing from moving axially away from the inner ring 1, making the position of the components more stable, avoiding deviation and vibration collision, and improving the smoothness of rotation and service life.

[0052] The inner side of the inner ring 1 is provided with a recess 12, and the outer side of the support ring 3 is provided with a clamping block 35 clamped in the recess 12. In this way, the axial relative movement between the inner ring 1 and the support ring 3 can be further avoided, and the relative position is more stable.

[0053] The clutch assembly 100 further includes a plurality of first rollers 6. A plurality of grooves 13 that match the sides of the first rollers 6 are provided on the outer side of the inner ring 1. The clutch assembly 100 is provided with an opening 43 that penetrates the clutch assembly 100 for accommodating the rollers. When the inner ring 1 and the outer ring 2 rotate relative to each other, the first rollers 6 always rotate within the grooves 13. The first rollers 6 and the grooves 13 form a bearing, which does not interfere with the clutch operation of the clutch assembly 100. In this way, the clutch and the bearing can be integrated, saving the axial space of the internal transmission and eliminating the need for a two-row design; the bearing part can make the concentricity between the clutch, the inner ring 1 and the outer ring 2 higher.

[0054] The clutch assembly 100 further includes a plurality of second rollers 7 and a plurality of slopes 14 corresponding to the positions of the second rollers 7 on the outer side of the inner ring 1. A plurality of roller grooves for accommodating the second rollers 7 are distributed on the cage 4. When the rotational speed of the inner ring 1 is higher than that of the outer ring 2, the second rollers 7 move towards the slopes 14, causing the second rollers 7 to be squeezed by the slopes 14 and the outer ring 2, so that the torque is transmitted from the inner ring 1 to the outer ring 2 through the second rollers 7, and the outer ring 2 then rotates at the same speed as the inner ring 1.

[0055] The first rollers 6 and the second rollers 7 are on the same plane. This can further save the axial space of the internal transmission.

[0056] An internal transmission includes the above clutch structure.

[0057] The inner ring 1 is a planet carrier, and the outer ring 2 is an internal gear ring.

[0058] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clutch structure, comprising an inner ring (1) and an outer ring (2) sleeved outside the inner ring (1), a clutch assembly (100) is arranged between the inner ring (1) and the outer ring (2), the outer ring (2) can be fixed relative to the inner ring (1) or rotate unidirectionally around a rotation axis, the clutch assembly (100) includes a cage (4) and a return elastic member (5), and is characterized in that: It further includes a support ring (3), the support ring (3) is arranged at one end inside the inner ring (1), the support ring (3) is relatively fixed to the inner ring (1), and a return elastic member (5) is arranged between the support ring (3) and the cage (4) for the cage (4) to return to its position.

2. The clutch structure according to claim 1, wherein: The cage (4) is provided with a boss (41), one end of the inner ring (1) is provided with a relief opening (11) penetrating through the outer side and the inner side of the inner ring (1), and the boss (41) passes through the relief opening (11) to the inside of the inner ring (1); one end of the return elastic member (5) is fixed to the boss (41), and the other end of the return elastic member (5) is fixed to the support ring (3).

3. The clutch structure according to claim 2, characterized in that: The support ring (3) is provided with a notch (31) penetrating through the inner side and the outer side of the support ring (3), and the boss (41) passes through the notch (31).

4. The clutch structure according to claim 3, wherein: One side of the notch (31) is provided with a stop block (32) for blocking the outside of the boss (41).

5. The clutch structure according to claim 2, characterized in that: The inner side of the support ring (3) is provided with a fixing block (33) extending inwards, and the fixing block (33) and the boss (41) are respectively provided with through holes (50), and both ends of the return elastic member (5) are respectively fixed to the through holes (50).

6. The clutch structure according to claim 2, characterized in that: The inner side of the support ring (3) is provided with a flange (34) for blocking the bearing from moving axially away from the inner ring (1).

7. The clutch structure according to claim 2, wherein: The inner side of the inner ring (1) is provided with a recess (12), and the outer side of the support ring (3) is provided with a clamping block (35) clamped in the recess (12).

8. The clutch structure according to any one of claims 2 to 7, characterized in that: The clutch assembly (100) further includes a plurality of first rollers (6), the outer side of the inner ring (1) is provided with a plurality of grooves (13) matching the sides of the first rollers (6), and the clutch assembly (100) is provided with an opening (43) for accommodating the rollers penetrating through the clutch assembly (100). When the inner ring (1) and the outer ring (2) rotate relatively, the first rollers (6) always rotate in the grooves (13).

9. The clutch structure according to claim 8, characterized in that: The clutch assembly (100) further includes a plurality of second rollers (7) and a plurality of slopes (14) corresponding to the positions of the second rollers (7) on the outer side of the inner ring (1). A plurality of roller grooves (44) for accommodating the second rollers (7) are distributed on the cage (4), and the first rollers (6) and the second rollers (7) are on the same plane.

10. An internal transmission, characterized in that: Comprising the clutch structure according to any one of claims 1 to 9.

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