Self-locking structure, automatic clutch engine and motorcycle

Abstract

The utility model relates to the field of engines of automobiles or motorcycles, in particular to a self-locking structure, an automatic clutch engine and a motorcycle. The self-locking structure comprises an outer cover (11), a sliding sleeve (12) is connected to the outer cover (11) in a sliding mode, at least one set of pin holes (122) are formed in the sliding sleeve (12), pin hole sleeves (122c) are arranged outside the pin holes (122), centrifugal pins (122b) are arranged on the pin hole sleeves (122c), and the centrifugal pins (122b) are in sliding fit with the pin holes (122). Compared with the prior art, automatic locking and unlocking of the sliding sleeve and the shaft sleeve can be achieved only through small changes. When an engine is in an idling state or a low rotating speed state, automatic locking can be achieved, the sliding sleeve and the shaft sleeve are prevented from being forcibly clamped and damaged, the service life of the shaft sleeve and the sliding sleeve is prolonged through the design, the stability of equipment in the running process is improved, and the large actual popularization value is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile or motorcycle engine, in particular to a self-locking structure, automatic clutch engine and motorcycle. BACKGROUND

[0002] The patent "a primary clutch, crankshaft, automatic clutch engine and motorcycle" submitted on the same day with the present application provides an automatic clutch engine, which comprises a sliding sleeve slidingly connected to an outer cover and a shaft sleeve fixedly connected to a crankshaft body, and the connection or disconnection of power transmission is realized by the connection or disconnection of the sliding sleeve and the shaft sleeve.

[0003] In the actual use process of the above-mentioned automatic clutch engine, especially in the engine idle state, the shaft sleeve installed on the crankshaft body rotates at a high speed (1500 revolutions per minute) with the crankshaft body, and the outer cover is in a relatively static state because it is not combined with the shoe block, so there is a high speed difference between the sliding sleeve and the shaft sleeve, and if the sliding sleeve is translated at this time, a large impact will be generated in the instant of contact between the two, which will not only damage the sliding sleeve or the shaft sleeve, but also reduce the driving experience of the driver and passenger.

[0004] Therefore, the technical personnel in the art are committed to developing a sliding sleeve with a self-locking structure, an automatic clutch engine and a motorcycle. CONTENT OF THE UTILITY MODEL

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is to provide a self-locking structure, an automatic clutch engine and a motorcycle.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a self-locking structure, which comprises an outer cover, a sliding sleeve slidingly connected to the outer cover, at least one group of pin holes provided on the sliding sleeve, a pin hole sleeve provided outside the pin hole, a centrifugal pin provided on the pin hole sleeve, and the centrifugal pin slidingly cooperates with the pin hole.

[0007] Preferably, an elastic supporting piece is arranged in the pin hole, one end of the elastic supporting piece is connected with the pin hole, and the other end is connected with the centrifugal pin.

[0008] Preferably, when the elastic supporting piece is in a free length, one end of the centrifugal pin extends out of the pin hole.

[0009] Preferably, a radial extending limiting hole is arranged on the outer cover, and the limiting hole cooperates with the end of the centrifugal pin extending out of the pin hole.

[0010] The utility model also provides an automatic clutch engine, which comprises the self-locking structure as any one of the above.

[0011] The utility model also provides a motorcycle, including the self locking structure as any above or the automatic clutch engine as above.

[0012] The utility model discloses the beneficial effect is: the utility model compares prior art only needs small change to realize the automatic locking and unlocking of sliding sleeve and shaft sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure schematic drawing of the outer cover in a specific embodiment of the utility model.

[0014] Figure 2 It is the structure schematic drawing of the sliding sleeve in a specific embodiment of the utility model.

[0015] Figure 3 It is the assembly schematic drawing of the outer cover and sliding sleeve in a specific embodiment of the utility model.

[0016] Figure 4 It is the front view of the outer cover in a specific embodiment of the utility model.

[0017] Figure 5 It is Figure 4 The cut structure schematic drawing of A-A in.

[0018] Figure 6 It is Figure 5 The structure enlarged schematic drawing of B in.

[0019] Figure 7 It is the assembly schematic drawing of the crankshaft body and shaft sleeve in a specific embodiment of the utility model.

[0020] Figure 8 It is the assembly schematic drawing of the outer cover and pawl in a specific embodiment of the utility model.

[0021] Figure 9 It is the assembly schematic drawing of the crankshaft and outer cover in a specific embodiment of the utility model.

[0022] Figure 10 It is the assembly schematic drawing of the whole in a specific embodiment of the utility model.

[0023] 11, cover; 12, sliding sleeve; 121, shift fork groove; 122, pin hole; 122a, elastic support; 122b, centrifugal pin; 122c, pin hole sleeve; 123, limiting hole; 124, primary driving tooth; 13, connecting protrusion; 21, shift claw; 22, sliding rod; 23, annular rib; 24, elastic connecting piece; 31, crankshaft body; 32, shaft sleeve; 33, connecting groove; 41, secondary clutch; 42, secondary driven tooth. DETAILED DESCRIPTION

[0024] The utility model will be further described below in combination with the drawings and examples. It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as limiting the utility model in terms of indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific manner. Therefore, it cannot be understood as limiting the utility model. The terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] As shown in FIG. Figures 1-3 A self-locking structure includes a cover 11, which serves as a mounting base and has a sliding sleeve 12 connected thereto. In this embodiment, the sliding connection is achieved using splines. Specifically, the cover 11 is provided with external splines, and the inner side wall of the sliding sleeve 12 is provided with internal splines corresponding to the external splines. The internal and external splines transmit power in cooperation with each other, and the sliding sleeve 12 can also reciprocate on the cover 11.

[0026] As shown in FIG. Figures 4-6 The sliding sleeve 12 is provided with at least one set of pin holes 122. In this embodiment, the pin holes 122 are through holes, and there are four sets of pin holes 122. In other embodiments, other numbers of pin holes 122 can also be provided according to the situation. The pin holes 122 are provided with a pin hole sleeve 122c, and the pin hole sleeve 122c is provided with a centrifugal pin 122b. The centrifugal pin 122b is cylindrical in shape and has a length less than or equal to the depth of the pin hole 122. The centrifugal pin 122b is in sliding cooperation with the pin hole 122. In this embodiment, the sliding cooperation is gap cooperation. The end of the centrifugal pin 122b can slide out of the pin hole 122.

[0027] In this embodiment, the cover 11 is provided with a radially extending limiting groove 123, which cooperates with the end of the centrifugal pin 122b that extends out of the pin hole 122. The locking or unlocking of the sliding sleeve 12 and the cover 11 is achieved by the mutual clamping of the centrifugal pin 122b and the limiting groove 123. Specifically, when the end of the centrifugal pin 122b is inserted into the limiting groove 123, the sliding sleeve 12 and the cover 11 are in a locked state. Conversely, when the end of the centrifugal pin 122b is disengaged from the limiting groove 123, the two are unlocked.

[0028] To achieve the above functions, the pin hole sleeve 122c is provided with an elastic support 122a, one end of the elastic support 122a is connected with the pin hole sleeve 122c, and the other end is connected with the centrifugal pin 122b. In this embodiment, the elastic support 122a is a spring, and other embodiments can also use other products of the same type, such as spring washers or spring rings. When the elastic support 122a is in free length, the centrifugal pin 122b is inserted into the limiting groove 123 under the support of the elastic support 122a, and at this time the sleeve 12 and the outer cover 11 are in a locked state; as the rotating speed of the outer cover 11 and the sleeve 12 increases, the centrifugal pin 122b compresses the elastic support 122a under the action of centrifugal force and is out of the limiting groove 123, at this time the outer cover 11 and the sleeve 12 are in an unlocked state.

[0029] In other embodiments, the elastic support 122a can be cancelled, and at least four pin holes 122 are arranged on the sleeve 12. The four pin holes 122 are all gap-fitted with centrifugal pins 122b. In use, at least one of the four spaced pin holes 122 is located above the sleeve 12, and the centrifugal pin 122b in the pin hole 122 above the sleeve 12 is clamped into the limiting groove 123 under the action of gravity, thereby achieving locking operation. As the rotating speed of the outer cover 11 and the sleeve 12 increases, the centrifugal pin 122b slides out of the limiting groove 123 under the action of centrifugal force to unlock.

[0030] By setting the centrifugal pin 122b to lock or unlock the outer cover 11 and the sleeve 12, the sleeve 12 and the shaft sleeve 32 are prevented from being damaged by forcibly clamping the connecting protrusion 13 or the connecting groove 33 when there is a large speed difference between them.

[0031] In this embodiment, a primary driving tooth 124 is arranged on the outer side wall of the sleeve 12. The primary driving tooth 124 is a straight tooth, mainly responsible for meshing transmission.

[0032] The sleeve 12 is provided with a connecting protrusion 13 at the end away from the outer cover 11. In this embodiment, the connecting protrusion 13 is arc-shaped, distributed along the circumference of the sleeve 12 and extends along its axis, mainly serving as a connection and transmission.

[0033] As shown in Figure 7 The utility model also provides a crankshaft, which comprises a crankshaft body 31, the crankshaft body 31 is connected with a crankcase (not shown in the figure), and is responsible for receiving and transmitting power. The shaft sleeve 32 is arranged on the crankshaft body 31. In this embodiment, the shaft sleeve 32 is sleeved on the crankshaft and is in interference fit with the crankshaft. In other embodiments, the two can also be connected by using splines.

[0034] The shaft sleeve 32 is provided with a connecting groove 33 at the end away from the crankshaft. In this embodiment, the connecting groove 33 is arc-shaped and is distributed along the circumference of the sleeve 12. The connecting groove 33 and the connecting protrusion 13 are clamped with each other, so that the power of the crankshaft body 31 can be directly transmitted to the sleeve 12 through the outer cover.

[0035] As Figure 8 shown, the outer side wall of the sliding sleeve 12 is provided with a radially extending yoke groove 121, the yoke groove 121 is rotationally connected with a yoke claw 21, the yoke groove 121 provides a mounting base for the yoke claw 21, and the yoke claw 21 is used to push the sliding sleeve 12 to slide. The yoke claw 21 is slidingly connected with a slide rod 22 on the side away from the sliding sleeve 12, and in the embodiment, the sliding fit is a clearance fit. The slide rod 22 is provided with a radially extending annular rib 23, and the annular rib 23 is provided with an elastic connecting piece 24. In the embodiment, the elastic connecting piece 24 is a spring, the spring is sleeved outside the slide rod 22, the annular rib 23 provides a mounting base for the elastic connecting piece 24, one end of the elastic connecting piece 24 is connected with the annular rib 23, and the opposite end is connected with the yoke claw 21. In use, the slide rod 22 is pushed to compress the elastic connecting piece 24, the elastic connecting piece 24 stores energy through elastic deformation, when the connecting protrusion 13 on the sliding sleeve 12 is aligned with the connecting groove 33 on the shaft sleeve 32, the elastic connecting piece 24 is elastically restored to push the yoke claw 21 to displace, the yoke claw 21 pushes the sliding sleeve 12 to synchronously displace and make it clamped with the shaft sleeve 32. The design reduces the operation difficulty of the user, and only needs to compress the elastic connecting piece 24 in advance to realize the automatic connection of the sliding sleeve 12 and the shaft sleeve 32.

[0036] As Figures 9-10 shown, the utility model also provides an automatic clutch engine, including the self locking mechanism that any preceding description is described above, still includes secondary clutch 41. In the embodiment, secondary clutch 41 is wet type multi-plate clutch, and other embodiments can also adopt other same type clutch such as dry type multi-plate clutch and single piece spring clutch etc. Secondary clutch 41 is provided with secondary driven tooth 42, and primary driving tooth 124 is always engaged with secondary driven tooth 42, and the power of primary clutch is transmitted to secondary clutch 41 through the engagement of the two.

[0037] The utility model also provides a motorcycle, including the self locking structure that any preceding description is described above or the automatic clutch engine that is described above.

[0038] The above detailed the preferred embodiment of the utility model. It should be understood that ordinary skilled in the art can make many modifications and changes according to the conception of the utility model without creative labor. Therefore, any technical scheme that the skilled in the art can obtain through logical analysis, reasoning or limited experiment on the basis of prior art according to the conception of the utility model should be within the protection scope determined by the claims.

Claims

1. A self-locking structure, characterized by: The self-locking structure comprises an outer cover (11), a sliding sleeve (12) is slidably connected to the outer cover (11), at least one group of pin holes (122) is arranged on the sliding sleeve (12), a pin hole sleeve (122c) is arranged outside the pin holes (122), a centrifugal pin (122b) is arranged on the pin hole sleeve (122c), and the centrifugal pin (122b) is in sliding fit with the pin holes (122).

2. The self-locking structure according to claim 1, wherein: An elastic supporting piece (122a) is arranged on the pin hole sleeve (122c), one end of the elastic supporting piece (122a) is connected with the pin hole sleeve (122c), and the other end is connected with the centrifugal pin (122b).

3. The self-locking structure according to claim 2, wherein: When the elastic supporting piece (122a) is in free length, one end of the centrifugal pin (122b) extends out of the pin hole (122).

4. The self-locking structure according to claim 3, wherein: A radial extending limiting groove (123) is arranged on the outer cover (11), and the limiting groove (123) is matched with the end of the centrifugal pin (122b) extending out of the pin hole (122).

5. An automatic clutching engine, characterized in that it comprises the self-locking structure according to any one of claims 1-4.

6. A motorcycle characterized by the fact that: The self-locking structure according to any one of claims 1-4 or the automatic clutching engine according to claim 5.

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