A one-way transmission single automatic clutch for motorcycle engine

Abstract

The present invention relates to a one-way transmission single automatic clutch for a motorcycle engine, comprising an active disc, a flyweight, a clutch plate A, a friction plate B, a friction plate A, a release spring, a clutch cover, a clutch plate B, a driving gear, a driving gear outer sleeve and a clutch hub, wherein the clutch hub is an annular structure as a whole, and its outer cylindrical surface is provided with a spline groove for connecting the friction plate B and the friction plate A, and its inner cylindrical surface is evenly distributed with a ramp groove with an opening at the right end, and the two side walls of the ramp groove are parallel to the axis of the clutch hub, and the closed end of the ramp groove on the left side is an inclined surface; the outer cylindrical surface of the driving gear outer sleeve is provided with evenly distributed convex keys corresponding to the ramp groove of the clutch hub, so as to match with the ramp groove of the clutch hub. The present invention solves the problem that a motorcycle with an automatic idle start-stop function moves backward when the gear is turned off or started, and can improve the riding comfort of users and eliminate safety hazards.

Description

Technical Field

[0001] The invention relates to a power transmission system of a motorcycle, and mainly to a motorcycle power transmission with an idle start-stop function, in particular to a one-way transmission single automatic clutch for a motorcycle engine. Background Art

[0002] At present, in response to the national call for energy conservation and environmental protection, some motorcycles have added an automatic idle start-stop function. After adding the idle start-stop function to a single automatic clutch structure model, when the engine gear is turned off or the gear is automatically started, the engine crankshaft will reverse, and the engine will transmit power backwards through the clutch, causing the motorcycle to instantly move backward, seriously affecting the user's riding comfort and posing a great safety hazard.

[0003] For a motorcycle equipped with an automatic idle start-stop mechanism, when the crankshaft rotates forward, after the speed reaches the clutch engagement speed, the clutch flyweights press the clutch plate and the friction plate together through centrifugal force, and the clutch active part is locked with the clutch hub. The clutch hub rotates forward to transmit power to the drive gear jacket, and the forward power of the crankshaft is transmitted, and the whole vehicle appears to be moving forward; when the crankshaft rotates reversely and the speed is low, the flyweights fail to centrifuge, the clutch active part rotates synchronously with the crankshaft, the clutch hub moves down along the profile line, the clutch plate and the friction plate combine, locking the active part with the clutch hub, and the reverse power of the crankshaft is transmitted, which causes the whole vehicle to move backward. Summary of the invention

[0004] In view of the problems in the background technology, the purpose of the present invention is to propose a one-way transmission single automatic clutch for a motorcycle engine, which solves the problem of the whole vehicle moving backward when the gear is turned off or started without affecting the automatic start-stop function, thereby improving the user's riding comfort and eliminating safety hazards.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A one-way transmission single automatic clutch for a motorcycle engine comprises a driving disc, a flyweight, a clutch plate A, a friction plate B, a friction plate A, a release spring, a clutch cover, a clutch plate B, a driving gear, a driving gear outer sleeve and a clutch hub, wherein the driving disc is coaxially sleeved on the engine crankshaft and splined with the engine crankshaft, the driving gear is sleeved on the engine crankshaft through a shaft sleeve and is located on the left side of the driving disc, a step shaft is provided at the left end of the driving disc, the driving gear outer sleeve is sleeved on the step shaft at the left end of the driving disc, an inner tooth is provided at the left end of the inner side of the driving gear outer sleeve for matching with the driving gear, a clutch hub is sleeved on the outer side of the driving gear outer sleeve, the clutch hub is connected to the driving gear outer sleeve, a friction plate A, a friction plate B, a clutch plate B and a release spring are provided on the clutch hub, the clutch plate A is arranged between the clutch hub and the driving disc, the clutch cover is arranged outside the driving disc and splined with the clutch plate A, the flyweight is arranged on the right side of the driving disc, the flyweight drives the clutch plate A under the action of centrifugal force, so that the clutch plate A is combined with the clutch plate B;

[0007] The clutch hub is an annular structure as a whole, and its outer cylindrical surface is provided with a spline groove for connecting the friction plate B and the friction plate A, and its inner cylindrical surface is evenly distributed with ramp grooves with an opening at the right end, and the two side walls of the ramp groove are parallel to the axis of the clutch hub, and the closed end on the left side of the ramp groove is an inclined surface;

[0008] The driving gear outer sleeve is also a circular ring structure as a whole, and an annular boss is provided inside it to match the step shaft at the left end of the driving disk, and the inner wall of the ring on the left side of the boss is provided with internal teeth for connecting the driving gear; the outer cylindrical surface of the driving gear outer sleeve is provided with evenly distributed convex keys corresponding to the ramp groove of the clutch hub, which are used to match the ramp groove of the clutch hub; the length and width of the convex keys are both smaller than the width and length of the ramp groove of the clutch hub, and the left end of the convex key is set as an inclined surface, which matches the inclined surface of the ramp groove of the clutch hub, and is used to make the convex key produce axial relative displacement in the ramp groove, and the distance of the axial relative displacement is smaller than the gap between the clutch plate B and the friction plate B on the same side when the clutch plate A is not driven.

[0009] The left end of the outer cylindrical surface of the driving gear outer sleeve is provided with a limiting gasket through a retaining spring, which is used to limit the position of the clutch outer cover.

[0010] The beneficial effects of the present invention are as follows: the present invention is applicable to motorcycles with an automatic idle start-stop function, and by providing a ramp groove connection between a driving gear outer sleeve and a clutch hub, and adjusting the matching clearance, the active part of the clutch and the clutch hub cannot be locked when the crankshaft is reversed, thereby solving the problem of the whole vehicle moving backward when the gear is turned off or started, improving the riding comfort of users and eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0012] Figure 2 It is a dispersed stereogram of the present invention.

[0013] Figure 3 It is a three-dimensional schematic diagram of the clutch hub.

[0014] Figure 4 Schematic diagram of the drive gear housing.

[0015] In the figure, 1, driving plate, 2, clutch plate A, 3, friction plate B, 4, friction plate A, 5, release spring, 6, clutch cover, 7, clutch plate B, 8, clutch hub, 9, driving gear outer sleeve, 10, driving gear, 11, crankshaft, 12, shaft sleeve, 13, retaining ring, 15, flying block, 16, ramp groove, 17, convex key. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0017] like Figures 1 to 4 As shown, a one-way transmission single automatic clutch for a motorcycle engine comprises a driving disc 1, a flyweight 15, a clutch plate A2, a friction plate B3, a friction plate A4, a release spring 5, a clutch cover 6, a clutch plate B7, a driving gear 10, a driving gear outer sleeve 9 and a clutch hub 8, wherein the driving disc 1 is coaxially sleeved on an engine crankshaft 11 and spline-connected with the engine crankshaft 11, the driving gear 10 is sleeved on the engine crankshaft 11 through a sleeve 12 and is located on the left side of the driving disc 1, a step shaft is provided at the left end of the driving disc 1, the driving gear outer sleeve 9 is sleeved on the step shaft at the left end of the driving disc 1, and the driving gear outer sleeve 9 is sleeved on the step shaft at the left end of the driving disc 1. The left end of the inner part of the wheel outer sleeve 9 is provided with internal teeth for matching with the driving gear 10. The clutch hub 8 is sleeved on the outer part of the driving gear outer sleeve 9. The clutch hub 8 is connected to the driving gear outer sleeve 9. The clutch hub 8 is provided with a friction plate A4, a friction plate B3, a clutch plate B7 and a release spring 5. The clutch plate A2 is arranged between the clutch hub 8 and the driving disk 1. The clutch cover 6 is arranged outside the driving disk 1 and is spline-connected with the clutch plate A2. The fly block 15 is arranged on the right side of the driving disk 1. The fly block 15 drives the clutch plate A2 under the action of centrifugal force, so that the clutch plate A2 is combined with the clutch plate B7.

[0018] The clutch hub 8 is an annular structure as a whole, and its outer cylindrical surface is provided with a spline groove for connecting the friction plate B3 and the friction plate A4, and its inner cylindrical surface is evenly distributed with ramp grooves 16 with an opening at the right end, and the two side walls of the ramp groove 16 are parallel to the axis of the clutch hub 8, and the left closed end of the ramp groove 16 is an inclined surface;

[0019] The driving gear outer sleeve 9 is also a circular ring structure as a whole, and an annular boss is provided inside it to match the stepped shaft at the left end of the driving disc 1, and the inner wall of the circular ring on the left side of the boss is provided with internal teeth for connecting the driving gear 10; the outer cylindrical surface of the driving gear outer sleeve 9 is provided with evenly distributed convex keys 17 corresponding to the ramp groove 16 of the clutch hub 8, which are used to match the ramp groove 16 of the clutch hub 8; the length and width of the convex keys 17 are both smaller than the width and length of the ramp groove 16 of the clutch hub, and the left end of the convex key 17 is set as an inclined surface, which matches the inclined surface of the ramp groove 16 of the clutch hub, so as to make the convex key 17 produce axial relative displacement in the ramp groove 16, and the distance of the axial relative displacement is smaller than the gap between the clutch plate B7 and the friction plate B3 on the same side when the clutch plate A2 is not driven.

[0020] The left end of the outer cylindrical surface of the driving gear housing 9 is provided with a limit ring 14 through a retaining ring 13 to limit the position of the clutch cover 6.

[0021] Principle of the present invention:

[0022] The centrifugal clutch has the following structural characteristics: first, there is a gap between the clutch plate and the friction plate when they are not engaged; second, there is also a gap between the clutch hub and the clutch cover after assembly;

[0023] After the technical solution proposed by the present invention is improved, when the crankshaft rotates forward, after the speed reaches the engagement speed of the clutch, the clutch flyweight presses the clutch plate and the friction plate together through the centrifugal force. At this time, due to the action of the continuous ramp grooves, the clutch hub is located at the rightmost extreme position, the clutch cover and the clutch hub are locked, and the clutch hub rotates forward to transmit power to the drive gear sleeve, and the forward power of the crankshaft is transmitted; when the crankshaft rotates forward and the speed is low, the flyweight centrifugal failure, the clutch cover and the clutch hub cannot be locked, and the crankshaft reverse power cannot be transmitted out, thereby achieving power cut-off; when the crankshaft reverses, the clutch cover rotates synchronously with the crankshaft, even if the speed reaches the engagement speed of the clutch, since the clutch hub and the drive gear sleeve are connected by the ramp groove, the drive gear sleeve drives the clutch hub to the left to the extreme position, so that the clutch plate B and the friction plate A cannot be combined, the active part and the clutch hub cannot be locked, and the crankshaft reverse power cannot be transmitted out, thereby achieving power cut-off.

[0024] In summary, through the one-way transmission single automatic clutch for motorcycle engines proposed by the present invention, power can only be transmitted in one direction under a specific direction and speed. Therefore, it is suitable for motorcycles with an automatic idle start-stop function, solves the problem of the whole vehicle moving backward when the gear is turned off or started, improves the riding comfort of users and eliminates safety hazards.

[0025] Parts of the present invention not described in detail are prior art.

Claims

1. A one-way transmission single automatic clutch for a motorcycle engine, comprising a driving disc (1), a flyweight (15), a clutch plate A (2), a friction plate B (3), a friction plate A (4), a release spring (5), a clutch cover (6), a clutch plate B (7), a driving gear (10), a drive gear outer sleeve (9) and a clutch hub (8), wherein the driving disc (1) is coaxially sleeved on an engine crankshaft (11) and spline-connected to the engine crankshaft (11), the driving gear (10) is sleeved on the engine crankshaft (11) through a sleeve (12) and is located on the left side of the driving disc (1), a step shaft is provided at the left end of the driving disc (1), the drive gear outer sleeve (9) is sleeved on the step shaft at the left end of the driving disc (1), and the drive gear outer sleeve (9) is sleeved on the step shaft at the left end of the driving disc (1). ) is provided with internal teeth at the left end thereof for cooperating with the driving gear (10); a clutch hub (8) is sleeved on the outside of the driving gear outer sleeve (9); the clutch hub (8) is connected to the driving gear outer sleeve (9); a friction plate A (4), a friction plate B (3), a clutch plate B (7) and a release spring (5) are provided on the clutch hub (8); the clutch plate A (2) is arranged between the clutch hub (8) and the driving disc (1); a clutch cover (6) is arranged outside the driving disc (1) and is spline-connected with the clutch plate A (2); a flyweight (15) is arranged on the right side of the driving disc (1); the flyweight (15) drives the clutch plate A (2) under the action of centrifugal force, so that the clutch plate A (2) is coupled with the clutch plate B (7); and the invention is characterized in that: The clutch hub (8) is an annular structure as a whole, and its outer cylindrical surface is provided with a spline groove for connecting the friction plate B (3) and the friction plate A (4), and its inner cylindrical surface is evenly distributed with ramp grooves (16) with right ends open, and the two side walls of the ramp grooves (16) are parallel to the axis of the clutch hub (8), and the left closed end of the ramp groove (16) is an inclined surface; The driving gear outer sleeve (9) is also an annular structure as a whole, and is provided with an annular boss inside thereof, which cooperates with the stepped shaft at the left end of the driving disc (1), and the inner wall of the annular ring on the left side of the boss is provided with internal teeth for connecting the driving gear (10); the outer cylindrical surface of the driving gear outer sleeve (9) is provided with evenly distributed convex keys (17) corresponding to the ramp groove (16) of the clutch hub (8), so as to cooperate with the ramp groove (16) of the clutch hub (8); the length and width of the convex keys (17) are both smaller than the width and length of the ramp groove (16) of the clutch hub, and the left end of the convex key (17) is provided with an inclined surface, which cooperates with the inclined surface of the ramp groove (16) of the clutch hub, so as to cause the convex key (17) to generate axial relative displacement in the ramp groove (16), and the distance of the axial relative displacement is smaller than the gap between the clutch plate B (7) and the friction plate B (3) on the same side when the clutch plate A (2) is not driven.

2. A one-way transmission single automatic clutch for a motorcycle engine according to claim 1, characterized in that: The left end of the outer cylindrical surface of the driving gear outer sleeve (9) is provided with a limit ring (14) via a retaining ring (13) for limiting the position of the clutch outer cover (6).

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