Bidirectional arc-shaped groove type transmission overrunning clutch

Abstract

The utility model provides a bidirectional arc-shaped groove type transmission overrun clutch which comprises a forward roller, a drum wheel, a center wheel, a backward roller and a baffle. The center wheel is provided with a two-way cambered surface, the two-way cambered surface comprises a forward cambered surface and a reverse cambered surface, the center wheel is installed in the drum wheel, a forward roller is installed on the forward cambered surface of the center wheel, a backward roller is installed on the reverse cambered surface of the center wheel, and the baffle is fixed to the end face of the drum wheel. A plurality of arc-shaped grooves are formed in the inner circumferential face of the drum wheel in the axial direction, and the arc-shaped grooves correspond to the forward pin rollers and the backward pin rollers. When large torque is transmitted, friction can be reduced through the ingenious mechanical principle, local overheating is avoided, and stable contact and transmission can still be kept under the action of the large torque.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of overrunning clutch, and specifically relates to a bidirectional arc slot type transmission overrunning clutch. BACKGROUND

[0002] The prior art overrunning clutch has low transmission efficiency, the traditional wedge block type structure has a friction loss of 15%-20% on the contact surface during high-speed operation, has small torque, and the maximum torque density of the mainstream product on the market is only 50Nm / kg, slips when overloaded, and has excessively high temperature at high speed, and when the speed exceeds 5000rpm, the working temperature rises at a rate of 8-10 DEG C per minute. SUMMARY

[0003] The utility model discloses a bidirectional arc slot type transmission overrunning clutch, and the bidirectional arc slot shape is reasonable, and the forward and reverse roller shapes and sizes are reasonable, can reduce friction under the action of large torque through ingenious mechanical principle, avoid local overheating, and still can keep stable contact and transmission under the action of large torque.

[0004] A bidirectional arc slot type transmission overrunning clutch, comprising a forward roller, a drum wheel, a hub, a reverse roller and a baffle, the hub has a bidirectional arc surface, the bidirectional arc surface comprises a forward arc surface and a reverse arc surface, the hub is installed in the drum wheel, the forward roller is installed on the forward arc surface of the hub, the reverse roller is installed on the reverse arc surface of the hub, and the baffle is fixed to the end surface of the drum wheel, the inner circumferential surface of the drum wheel is provided with a plurality of arc grooves in the axial direction, and the arc grooves correspond to the forward roller and the reverse roller, the arc line radius of the reverse arc surface is the same as that of the forward arc surface, and is greater than the radius of the hub, and the forward roller and the reverse roller are the same in shape and size.

[0005] Further, the forward arc surface and the reverse arc surface are connected through a transition surface.

[0006] Further, the baffle is fixed to the end surface of the drum wheel through a countersunk screw.

[0007] Further, when the hub rotates to the right, the forward roller moves along the forward arc surface of the hub under the action of centrifugal force, is coupled with the arc groove of the drum wheel, realizes torque transmission, drives the drum wheel to rotate, when the hub stops rotating, the drum wheel is still in a rotating state and performs rightward overrun under the action of inertia, when the hub rotates to the left, the reverse roller moves along the reverse arc surface of the hub, is coupled with the arc groove of the drum wheel, drives the drum wheel to rotate at the same speed, and when the hub stops rotating, the drum wheel is still in a rotating state and performs leftward overrun under the action of inertia.

[0008] The bidirectional arc-shaped groove type transmission overrunning clutch can realize quick response of a transmission system under high transmission rotating speed and large torque, can realize positive and reverse overrunning, and the movement parts do not slip with each other during overrunning, power loss is small, the smooth and reliable transmission is realized by the ingenious design, vibration and impact are reduced, and the service life of equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a structural schematic view of a bidirectional arc-shaped groove type transmission overrunning clutch according to an embodiment of the present application.

[0010] Figure 2 is Figure 1 a sectional view.

[0011] Figure 3 is a front view of a drum according to an embodiment of the present application.

[0012] Figure 4 is Figure 3 an enlarged view of V part in

[0013] Figure 5 is Figure 3 a sectional view.

[0014] Figure 6 is a front view of a center wheel according to an embodiment of the present application.

[0015] Figure 7 is Figure 3 a sectional view.

[0016] The reference signs in the drawings are described as follows: 1 - forward roller, 2 - drum, 3 - center wheel with bidirectional arc surface, 4 - backward roller, 5 - baffle, 6 - bidirectional arc surface, 21 - arc-shaped groove, 61 - forward arc surface, 62 - reverse arc surface. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] Please refer to Figures 1-7The utility model discloses a two -way arc -shaped groove formula drive overrun clutch, including forward roller 1, drum 2, heart wheel 3, backward roller 4 and baffle 5.Heart wheel 3 has two -way arc surface 6, two -way arc surface 6 includes advancing arc surface 61 and reverse arc surface 62, and advancing arc surface 61 and reverse arc surface 62 are connected through transition surface, heart wheel 3 is installed in drum 2, and advancing arc surface 61 is equipped with forward roller 1 at heart wheel 3, and backward roller 4 is equipped with backward roller 4 at heart wheel 3's reverse arc surface 62, and forward roller 1 is 15 ° with the axial misplacement of backward roller 4, can avoid resonance phenomenon.

[0019] The arc radius of the reverse arc surface 62 is the same as the arc radius of the advancing arc surface 61, and is greater than the radius of the heart wheel 3, the forward roller 1 and the backward roller 4 are the same in shape and size, so that the same overrun effect can be realized whether forward running or backward running. Figure 3 And Figure 4 As shown in the drawings, the inner circumferential surface of the drum 2 is provided with a plurality of arc grooves 21 along the axial direction, and the arc grooves 21 correspond to the forward roller 1 and the backward roller 4. The baffle 5 is fixed to the end face of the drum 2 by 8 M4 countersunk head screws, and the axial gap is controlled to be 0.05-0.1mm.

[0020] When the heart wheel 3 rotates to the right, the forward roller 1 moves along the advancing arc surface 61 of the heart wheel 3 under the action of centrifugal force, is coupled with the arc groove 21 of the drum 2, torque transmission is realized, and the drum 2 is driven to rotate; when the heart wheel 3 stops rotating (the input speed is lower than the output end), the drum 2 is still in a rotating state under the action of inertia and right overrun is performed.

[0021] When the heart wheel 3 rotates to the left, the backward roller 4 moves along the reverse arc surface 62 of the heart wheel 3, is coupled with the arc groove 21 of the drum 2, and drives the drum 2 to rotate at the same speed; when the heart wheel 3 stops rotating, the drum 2 is still in a rotating state under the action of inertia and left overrun is performed.

[0022] Because the rotating speed of the drum 2 is greater than and equal to the rotating speed of the heart wheel 3, the backward roller 4 is at the lowest position away from the rotation center when the heart wheel 3 rotates to the right, so the backward roller 4 does not couple with the drum 2 for transmission; when the heart wheel 3 rotates to the left, the backward roller 4 is at the lowest position away from the rotation center, so the backward roller 4 does not couple with the drum 2 for transmission.

[0023] The utility model discloses a two -way arc -shaped groove formula drive overrun clutch, through specially designed double -curved surface heart wheel (3) and many arc groove drum (2) cooperation, front / back roller group (1, 4) work in the installation ring of axial separation, realize two -way transmission when contact stress balanced distribution. The structure makes the rated torque to promote to 2.3 times of traditional structure, and the working temperature is stably below 65 DEG C under 5000rpm working condition, and the temperature rise reduces 40 DEG C above.

[0024] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any change or replacement that can be easily thought of by any person skilled in the art within the technical scope disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A bi-directional arcuate slot drive overrunning clutch characterized by: The application relates to a forward roller (1), a drum wheel (2), a heart wheel (3), a backward roller (4) and a baffle (5); the heart wheel (3) is provided with bidirectional curved surfaces (6), the bidirectional curved surfaces (6) comprise a forward curved surface (61) and a backward curved surface (62), the heart wheel (3) is installed in the drum wheel (2), the forward roller (1) is installed on the forward curved surface (61) of the heart wheel (3), the backward roller (4) is installed on the backward curved surface (62) of the heart wheel (3), and the baffle (5) is fixed to the end surface of the drum wheel (2); the inner circumferential surface of the drum wheel (2) is provided with a plurality of arc-shaped grooves (21) in the axial direction, the arc-shaped grooves (21) correspond to the forward roller (1) and the backward roller (4); the arc radius of the backward curved surface (62) is the same as that of the forward curved surface (61) and is larger than the radius of the heart wheel (3); the forward roller (1) and the backward roller (4) are the same in shape and size.

2. The bi-directional arcuate slot drive overrunning clutch of claim 1, wherein: The forward curved surface (61) and the backward curved surface (62) are connected through a transition curved surface.

3. The bi-directional arcuate slot drive overrunning clutch of claim 1, wherein: The baffle (5) is fixed to the end surface of the drum wheel (2) through a countersunk screw.

4. The bi-directional arcuate slot drive overrunning clutch of claim 1, wherein: When the heart wheel (3) rotates to the right, the forward roller (1) moves along the forward curved surface (61) of the heart wheel (3) under the action of centrifugal force, is coupled with the arc-shaped groove (21) of the drum wheel (2) and realizes torque transmission, drives the drum wheel (2) to rotate, when the heart wheel (3) stops rotating, the drum wheel (2) is still in a rotating state and performs rightward overrun under the action of inertia, when the heart wheel (3) rotates to the left, the backward roller (4) moves along the backward curved surface (62) of the heart wheel (3), is coupled with the arc-shaped groove (21) of the drum wheel (2) and drives the drum wheel (2) to rotate at the same speed, when the heart wheel (3) stops rotating, the drum wheel (2) is still in a rotating state and performs leftward overrun under the action of inertia. The forward curved surface (61) and the backward curved surface (62) are connected through a transition curved surface. The baffle (5) is fixed to the end surface of the drum wheel (2) through a countersunk screw. The heart wheel (3) rotates to the right when the forward roller (1) is subjected to the action of centrifugal force and moves along the forward curved surface (61) of the heart wheel (3), is coupled with the arc-shaped groove (21) of the drum wheel (2), realizes torque transmission, drives the drum wheel (2) to rotate, the heart wheel (3) stops rotating, the drum wheel (2) is still in a rotating state and performs rightward overrun under the action of inertia, the heart wheel (3) rotates to the left, the backward roller (4) moves along the backward curved surface (62) of the heart wheel (3), is coupled with the arc-shaped groove (21) of the drum wheel (2), drives the drum wheel (2) to rotate at the same speed, the heart wheel (3) stops rotating, the drum wheel (2) is still in a rotating state and performs leftward overrun under the action of inertia.

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