JP3081427U - Two-stage transmission - Google Patents

Abstract

(57) Abstract: Provided is a two-stage transmission mechanism that achieves a two-stage transmission effect of further accelerating or decelerating in an acceleration and deceleration process and improves torsional performance. SOLUTION: A first gear 4, a second gear 6, a first gear 4 and a second gear 6 are provided in series, and a bearing 43 is provided between the first gear 4 and the second gear 6. One way bearing 8
, The clutch 5 connected to the output shaft 9 and attached to the first gear 4, and the first gear 71 and the second gear 72 are respectively connected to the first gear 4 and the second gear 6.
, The idler gear 7 connected to the first gear 4, and the engine 3 in which the active gear 31 meshes with the driven gear 2. When the engine 3 is operated, the active gear 31 rotates the driven gear 2 and the first gear 4, the first gear 4 rotates the idle gear 7, the idle gear 7 rotates the second gear 6, The gear 6 rotates the output shaft 9 by the action of the bearing 43, and the clutch 5 rotates with the output shaft 9.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a two-speed transmission, and particularly achieves a two-speed transmission effect of further accelerating or decelerating by a combination of gears in the process of accelerating or decelerating the engine of a remote control toy car, and has a larger overall volume than conventional devices. The present invention relates to a two-stage transmission that is small, simple in construction, has lower manufacturing costs, and is highly economical.

[0002]

[Prior art]

 A conventional gasoline engine-type remote control toy car has a torsion enhanced by the transmission when power is output from the engine.However, the conventional toy car transmission is designed to have only one speed change. However, when the toy car accelerates and proceeds, the acceleration effect is not remarkable, and the torsional expression at low speed cannot be improved.

A conventional two-speed transmission for a toy car can overcome the disadvantages of the single-stage transmission described above, but its volume is rather large and occupies the space of the toy car's chassis. The volume must be large, the weight is heavy, the manufacturing cost is high, it is not economically viable, and it is fragile. In addition, the precision of the conventional two-stage speed changer for toy cars is rather high, so the structure is complicated and manufacturing is difficult.

[0004]

[Problems to be solved by the invention]

 The main object of the present invention is to achieve a two-stage transmission effect in which the combination of gear units accelerates or decelerates in the process of accelerating or decelerating the engine, and improves the torsional performance during acceleration or deceleration. Is to provide. A second object of the present invention is to provide a two-stage transmission in which the automatic conversion between acceleration and deceleration is achieved by elaborate conversion of the gearing.

A further object of the present invention is that the overall structure is more elaborate and simpler than the conventional two-stage transmission, has a smaller volume, does not occupy much chassis space, is less susceptible to damage, has lower manufacturing costs, An object of the present invention is to provide a two-stage transmission having excellent economic value.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the present invention employs the means described in claim 1. According to this method, the two-stage transmission has a recessed space, and the first gear, the second gear, and the first and second gears, each having a projection on the side wall of the recessed space, are connected in series. And an output shaft provided with a bidirectional bearing between the first gear and the first gear, and an output shaft connected to the output shaft and provided with a one-way bearing between the second gear and the first gear. A clutch mounted in the recessed space, and a first gear and a second tooth, the first tooth and the second tooth being idle gears meshing with the first gear and the second gear, respectively; A driven gear connected to the first gear and an active gear are connected, and the active gear includes an engine engaged with the driven gear.

When the engine is operated, the active gear drives and rotates the driven gear and the first gear simultaneously, the first gear drives and rotates the idle gear, and the idle gear drives and rotates the second gear. The second gear drives and rotates the output shaft by the action of the one-way bearing, and at the same time, the clutch rotates with the output shaft. When the rotation speed of the output shaft increases to a predetermined value, the clutch engages with the projection of the first gear under the action of centrifugal force, and the power of the engine is output directly via the driven gear and the first gear. It is transmitted to the axis, and the deceleration stops. When the rotation speed of the output shaft decreases to a predetermined value, the clutch separates from the first gear again, further recovers the transmission path, reduces the speed, and increases the torsion.

According to the second aspect of the present invention, the swing member is pivotally mounted on the clutch by a pivot, and one end of the swing member receives the stop of the stop member, and the stop member and the main body of the clutch. A spring is installed between the spring member and the elasticity of the spring acting on one end of the swing member so that the swing member is balanced so that the other end of the swing member does not extend from the clutch. When a centrifugal force larger than the elastic force of the spring is applied to the clutch, one end of the swinging member is swung out of the clutch and fitted to a projection provided on the first gear.

[0009]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a two-stage transmission for a remote control toy car according to one embodiment of the present invention includes a main body composed of a casing 1 and a lid 1A, an engine 3 connecting an active gear 31 and a driven gear 2; , A first gear 4, a clutch 5, a second gear 6, an idle gear 7, a one-way bearing 8, and an output shaft 9.

A hole 13 and a concave hole 11 are provided on the bottom surface in the casing 1 described above, and a concave hole 11A is also provided on the bottom surface in the lid 1A corresponding to the position of the concave hole 11 as well. Is covered by the casing 1 to form a complete body. One side surface of the first gear 4 has a concave space, and a protrusion 45 is provided on a side wall of the concave space as shown in FIG. A tooth 41 is provided on the outer peripheral portion of the first gear 4, and an external thread 42 is provided on one end of the first gear 4. A bearing 61 which can rotate in two directions is provided in the center hole 44 of the first gear 4. The second gear 6 is provided with teeth 61 on an outer peripheral portion and has a center hole 62, and the one-way bearing 8 is fitted and installed in the center hole 62.

The structure of the clutch 5 is as shown in FIG. 3, and a swing member 51 is pivotally mounted with a pivot 511, and the swing member 51 can swing like a seesaw plate. One end of the swing member 51 is stopped by a stop member 53, and a spring 52 is provided between the stop member 53 and the clutch 5 main body. By operation, the other end of the swing member 51 does not extend from the clutch. The above-mentioned spring 52 is adjustable, and the spring 52 adjusts the magnitude of the elastic force acting on the rocking member 51 so that the clutch 5 can generate one end of the rocking member 51 by centrifugal force generated at a constant rotation speed. Can be controlled from the clutch. A clip 54 is provided at the center of the clutch 5, and a clip plate 541 extends from the clip 54, and the clip 54 is attached to the output shaft 9. The clamping plate 541 is tightened by the bolt 55 to tighten the clamping ring 54, and the output shaft 9 is clamped and fixed by the clamping ring 54. The clutch 5 is fixed to the output shaft 9, and the clutch 5 is set in the recessed space of the first gear 4. When assembling the output shaft 9 to the first gear 4 and the second gear 6, the output shaft 9 is connected to the bearing 43 and the one-way bearing 8 at the same time.

The idle gear 7 has a first tooth 71 having a relatively large outer diameter and a second tooth 72 having a relatively small outer diameter. The center shaft 12 passes through a shaft hole of the idle gear 7. After that, the both ends of the central shaft 12 are assembled in the recessed holes 11 and 11A of the casing 1 and the lid 1A, respectively, and the first teeth 71 are engaged with the teeth 41 of the first gear 4, and the second teeth 72 are The second gear 6 is engaged.

When the above-mentioned first gear 4 is assembled into the casing 1, the external screw 42 protrudes through the hole 13 of the casing 1, and is further driven by tightening the external screw 42 to the internal screw 21 of the driven gear 2. The gear 2 and the first gear 4 are integrally connected, and the driven gear 2 is engaged with an active gear 31 connected to the engine 3.

After assembling the members as described above, the lid 1A is put on the casing 1 and tightened. The structure after the combination is as shown in FIG. With the above device, when the engine 3 starts operating, the active gear 31 drives the driven gear 2 and the first gear 4 to rotate simultaneously, and the first gear 4 meshes with the first teeth 71. The idle gear 7 is driven to rotate, and since the second tooth 72 is connected to the first tooth 71, the idle gear 7 further drives and rotates the second gear 6, and the second gear 6 is a one-way bearing 8 Then, the output shaft 9 is driven to rotate at a low speed by the action described above, and the first end portion 91 and the second end portion 92 of the output shaft 9 are connected to the rear wheel and the front wheel system of the toy car, respectively. , Drive and rotate the rear wheels. When the power of the engine 3 is constantly output and accelerated, and the rotation speed of the output shaft 9 reaches a preset value of the clutch 5, the clutch 5 is subjected to the action of centrifugal force, as shown in FIG. The swinging member 51 overcomes the elasticity of the spring 52 and is swung out of the clutch. At this time, the protrusion 45 of the rotating first gear 4 comes into contact with and engages with the protruding one end of the swinging member 51, whereby the power of the engine directly connects the driven gear 2 and the first gear 4. Thus, the acceleration of the output shaft 9 is further improved without being transmitted to the output shaft 9 and decelerating. When the power output from the engine 3 decreases and the rotation speed of the output shaft 9 decreases to a preset value, the elasticity of the spring 52 overcomes the centrifugal force again and causes the swing member 51 to rotate. The end that originally fits into the projection 45 is shrunk into the clutch 5, and the power of the engine 3 is output again through the first gear 4, the idle gear 7, and the second gear 6 from the output shaft 9. The torsion of the output shaft 9 is further improved, thereby achieving the purpose of the two-stage automatic transmission.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a combination of components of a two-speed transmission of a remote control toy car according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating the two-speed transmission of the remote control toy car according to the embodiment of the present invention;

FIG. 3 is a cross-sectional view illustrating a clutch according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating an operation of the clutch according to the embodiment of the present invention;

[Explanation of symbols]

 Reference Signs List 2 driven gear 3 engine 4 first gear 5 clutch 6 second gear 7 idle gear 8 unidirectional bearing 9 output shaft 31 active gear 43 bearing 45 protrusion 71 first tooth 72 second tooth

Claims (2)

[Utility model registration claims] A first gear having a recessed space, wherein a projection is provided on a side wall of the recessed space; a second gear; the first gear and the second gear being provided in series; An output shaft provided with a two-way bearing between the first gear and the one-way bearing provided between the first gear and the second gear; A first gear and a second gear, the first gear and the second gear meshing with the first gear and the second gear, respectively; A driven gear connected to one gear; and an active gear connected to the engine, the active gear including an engine meshing with the driven gear, wherein when the engine is operated, the active gear is the driven gear. And driving the first gear to rotate simultaneously,
The first gear drives and rotates the idle gear, the idle gear drives and rotates the second gear, and the second gear drives and rotates the output shaft by the action of the one-way bearing. At the same time, the clutch rotates with the output shaft, and when the rotation speed of the output shaft increases to a predetermined value, the clutch engages with the projection of the first gear under the action of centrifugal force. The power of the engine is directly transmitted to the output shaft via the driven gear and the first gear, and does not decelerate. When the rotation speed of the output shaft decreases to a predetermined value, the clutch re-engages the first gear. A two-speed transmission characterized in that the transmission path is recovered, the transmission path is recovered, the speed is reduced, and the torsion is increased. 2. A swing member is pivotally mounted on the clutch by a pivot, and one end of the swing member receives a stop of a stop member, and a spring is provided between the stop member and a body of the clutch. The elasticity of the spring acts on one end of the oscillating member so that the oscillating member is kept in balance so that the other end of the oscillating member does not extend from the clutch. 2. When a centrifugal force greater than the elastic force of a spring is applied, one end of the swinging member is swung out of the clutch and fitted to a projection provided on the first gear. 3. 2. The two-stage transmission according to claim 1.