JP2003139020A - Force accumulated starting engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give less influences of vibration to reducing means. SOLUTION: In this force accumulated starting engine, at stopping an engine, the rotating force of a crank shaft 1 before stopping is accumulated by force accumulating means 3, during stopping the engine, the force accumulated by the force accumulating means 3 is held, and at starting the engine, the force accumulated by the force accumulating means 3 is output to the crank shaft 1. A crank shaft extension 5 protruding from a crank case 4 is used as a supporting shaft 6, the reducing means is provided in an input passage from the crank shaft to the force accumulating means 3 and the reducing means 31 is supported by the supporting shaft 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power storage start type engine.

[0002]

2. Description of the Related Art Conventionally, as in the case of the present invention, as a power storage start type engine, when the engine is stopped, the torque of the crankshaft before the stop is stored in a power storage means via a power storage clutch and while the engine is stopped. There is a system in which the stored power of the power storage means is retained and the stored power of the power storage means is output to the crankshaft when the engine is started. Conventionally, in this type of engine, a speed reducer provided in an input path from a crankshaft to a pressure accumulator is supported by a fan cover or an engine housing.

[0003]

The above prior art has the following problems. << Problem 1 >> The deceleration means is easily affected by vibration. In the engine, rolling vibration occurs around a crank shaft, a power take-off shaft, and an interlocking shaft that is installed outside the crank case and is driven by the crank shaft. Since it is supported at a position distant from, the swinging width of the speed reducer becomes large and it is easily affected by vibration. For this reason, this causes a malfunction of the deceleration means.

<Problem 2> The support of the speed reducing means is unstable. When the speed reducer is supported by the fragile fan cover, the support of the speed reducer is unstable. Therefore, this also causes a malfunction of the speed reducing means.

<Problem 3> In some cases, the speed reducing means cannot be arranged compactly. When the speed reducer is supported by the side of the shaft, the speed reducer largely projects to the side of the shaft and cannot be arranged compactly.

An object of the present invention is to provide a power storage start type engine which can solve the above problems.

[0007]

The constitution of the invention of claim 1 is as follows. As shown in FIG. 1, when the engine is stopped, the torque of the crankshaft (1) before stopping is stored in the power storage means (3).
The stored power of the power storage means (3) is maintained while the engine is stopped, and the stored power of the power storage means (3) is output to the crankshaft (1) when the engine is started. In a power start type engine, a crankshaft extension (5) protruding from the crankcase (4), a power take-off shaft extension protruding from the crankcase (4), and a crankshaft installed outside the crankcase (4)
One of the interlocking shafts driven by (1) is the supporting shaft (6)
The speed reduction means (31) is provided in the input path from the crankshaft (1) to the power storage means (3), and the speed reduction means (31) is used as a support shaft.
A power storage start type engine characterized in that it is supported by (6).

[0008]

EFFECT OF THE INVENTION (Invention of Claim 1) The invention of Claim 1 is
It has the following effects. << Effect 1 >> The deceleration means is less susceptible to vibration. In the engine, rolling vibration is generated around the crank shaft (1), the power take-off shaft, and the interlocking shaft that is installed outside the crank case (4) and is driven by the crank shaft (1). Since the speed reducing means (31) is supported at the center of the rolling vibration, the swinging width of the speed reducing means (31) becomes small and is less likely to be affected by the vibration. Therefore, malfunction of the deceleration means (31) due to vibration is unlikely to occur.

<Effect 2> The support of the speed reducing means is stable. Since the speed reducing means (31) is supported on the support shaft (6) which is firmly supported, the support of the speed reducing means (31) is stable. Therefore, malfunction of the deceleration means (31) due to instability of support is unlikely to occur.

<Effect 3> The speed reducing means can be compactly arranged. Since the speed reducer (31) is supported by the support shaft (6), the support shaft
Compared with the case of supporting it on the side of (6), the overhanging dimension of the speed reducing means (31) to the side of the support shaft (6) is short, and it can be arranged compactly.

<Effect 4> Accumulation of power is possible even at low torque rotation. Since the speed reducing means (31) is provided, it is possible to store power even at low torque rotation.

(Invention of Claim 2) The invention of Claim 2 has the following effect in addition to the effect of the invention of Claim 1. << Effect 5 >> The power storage clutch is less susceptible to vibration. In the engine, rolling vibration is generated around the crank shaft (1), the power take-off shaft, and the interlocking shaft that is installed outside the crank case (4) and is driven by the crank shaft (1). Since the power storage clutch (2) is supported at the center of rolling vibration, the swing width of the power storage clutch (2) becomes small and is less susceptible to vibration. Therefore, malfunction of the power storage clutch (2) due to vibration is unlikely to occur.

<Effect 6> The support of the power storage clutch is stable. Since the power storage clutch (2) is supported on the support shaft (6) that is firmly supported, the support of the power storage clutch (2) is stable.
Therefore, the power storage clutch (2) caused by the instability of the support
Is less likely to malfunction.

<Effect 7> The energy storage clutch can be arranged compactly. Since the power storage clutch (2) is supported on the support shaft (6), the overhanging dimension of the power storage clutch (2) on the side of the support shaft (6) is smaller than that when it is supported on the side of the support shaft (6). It is short and can be compactly arranged.

(Invention of Claim 3) The invention of claim 3 has the following effect in addition to the effect of the invention of claim 1 or claim 2. << Effect 8 >> The power storage means is less susceptible to vibration. In the engine, rolling vibration is generated around the crank shaft (1), the power take-off shaft, and the interlocking shaft that is installed outside the crank case (4) and is driven by the crank shaft (1). Since the power storage means (3) is supported at the center of rolling vibration, the swing width of the power storage means (3) becomes small,
Less susceptible to vibration. Therefore, malfunction of the power storage means (3) due to vibration is unlikely to occur.

<Effect 9> The support of the energy storage means is stable. Since the power storage means (3) is supported by the support shaft (6) which is firmly supported, the support of the power storage means (3) is stable. Therefore, malfunction of the force accumulating means (3) due to instability of support is unlikely to occur.

<Effect 10> The energy storage means can be arranged compactly. Since the power storage means (3) is supported by the support shaft (6), the support shaft
Compared with the case of supporting it on the side of (6), the overhanging dimension of the force accumulating means (3) to the side of the support shaft (6) is short, and it can be arranged compactly.

(Invention of Claim 4) The invention of claim 4 has the following effect in addition to the effect of the invention of any one of claims 1 to 3. << Effect 11 >> The useful life of the energy storage means can be extended. Since the excessive power storage of the power storage means (3) is avoided,
An unnecessary load is not applied to the power storage means (3), and the useful life of the power storage means (3) can be extended. << Effect 12 >> No special excess energy avoidance means is required. Excessive energy storage is avoided by slipping the deceleration means (31), so no special excess energy storage means is required.

(Invention of Claim 5) The invention of claim 5 has the following effect in addition to the effect of the invention of any one of claims 1 to 4. << Effect 13 >> Manual start is possible. Since the crankshaft (1) can be interlocked from the manual starting means (7), the stored energy is retained in the energy storage means (3) such as when starting the engine for the first time or when the stored energy fails. Even if it is not installed, manual start is possible.

<< Effect 14 >> A manual start can be promptly performed. When interlocking the crankshaft (1) from the manual starting means (7), the crankshaft (1) is directly connected without using the energy storage means (3).
The manual start can be performed promptly without the effort required for energy storage.

(Invention of Claim 6) The invention of claim 6 has the following effect in addition to the effect of the invention of claim 5. << Effect 15 >> A manual start can be easily performed. Since the recoil starter is provided as the manual starting means (7), the manual starting can be easily performed as compared with the case where the recoil handle is attached and the starting is performed each time the starting is performed.

(Invention of Claim 7) The invention of claim 7 has the following effect in addition to the effects of the inventions of claims 1 to 6. << Effect 16 >> The deceleration means can be compactly arranged. The reduction means (31) is composed of an external tooth drive gear (41), an external tooth relay gear (42) and an internal tooth driven gear (43), and the drive gear (41) is attached to the support shaft (6). The relay gear mounting body (44) and the driven gear (43) are both rotatably mounted on the support shaft (6), and the relay gear (42) is pivotally supported on the relay gear mounting body (44). In order to mesh the intermediate gear (42) with the drive gear (41) and the driven gear (43), the support shaft (6)
Compared with the case where the speed reduction means (31) is supported beside the
The overhanging dimension of the speed reducing means (31) to the side of (6) is short, and it can be arranged compactly.

(Invention of Claim 8) The invention of claim 8 has the following effect in addition to the effects of the inventions of claims 1 to 7. << Effect 17 >> It is possible to perform reliable accumulation start with a simple mechanism. The power storage clutch (2) is composed of a drive clutch part (8) and a driven clutch part (9), and the power storage means (3) is an input / output body (47).
And elastic force storage body (12), fixed body (48) and one-way clutch
Since it is composed of (14) and (14), it is possible to perform a reliable power accumulation start with a simple mechanism.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 to 9 are diagrams for explaining an embodiment of the present invention. In this embodiment, a single cylinder tilt type spark ignition type air-cooled engine will be described.

The structure of this engine is as follows.
As shown in FIG. 9, when the engine is stopped, the rotational force of the crankshaft (1) before the stop is stored in the power storage means (3), and the stored power of the power storage means (3) is held while the engine is stopped. However, when the engine is started, the stored power of the power storage means (3) is output to the crankshaft (1).

The structure of this engine is as follows.
As shown in FIG. 9, the cylinder head (51) is attached to the upper part of the cylinder block (50),
A head cover (52) is attached to the upper part of the. The cylinder block (50) is formed by projecting a cylinder (53) upward from the crankcase (4). In FIG. 9, the cylinder (53) is projected right above the crankcase (4), but in reality, the cylinder (53) is located in the crankcase (4).
Is projected diagonally upward in the depth direction of the paper. A crankshaft (1) is installed in the crankcase (4). Flywheel fan in front of the crankcase (4)
(54) is arranged and fixed to the front end of the crankshaft (1). A magnet (55) is attached to the flywheel fan (54), and a magneto unit (56) is attached to the cylinder (53). An ignition plug (not shown) and an ignition switch (not shown) are connected to the magneto unit (56).

The structure of the deceleration means (31) is as follows. As shown in FIG. 9, from the crankshaft (1) to the power storage means
A speed reducing means (31) is provided in the input path to (3), and the speed reducing means (31) is supported by the crankshaft extension (5).
As shown in FIG. 3, the speed reducer (31) is a drive gear for external teeth.
(41) and external gear relay gear (42) and internal tooth driven gear (43)
It consists of and. Drive gear on crankshaft extension (5)
(41) is fixed, both the relay gear attachment (44) and the driven gear (43) are rotatably attached to the crankshaft extension (5), and the relay gear (42) is attached to the relay gear attachment (44). The relay gear (42) and the drive gear (41) and the driven gear.
It meshes with (43). As shown in FIG. 1, when the braked portion (45) is fixed to the relay gear mounting body (44) and the braked portion (45) is braked by the braking portion (46) shown in FIG. 3, the relay gear mounting body ( The rotation of the gear 44 is braked, the relay gear 42 rolls, and the rotation speed of the driven gear 43 is reduced more than the rotation speed of the crankshaft 1.

The structure of the storage clutch (2) is as follows. As shown in FIG. 1, a power storage clutch (2) is supported on the crankshaft extension (5). The power storage clutch (2) is composed of a drive clutch section (8) and a driven clutch section (9). The drive clutch portion (8) is fixed to the driven gear (43), and the driven clutch portion (9), which will be described later, is fixed. The drive clutch unit (8) is a key, the driven clutch unit (9)
Is a keyway.

The structure of the energy storage means (3) is as follows.
As shown in FIG. 1, the force storage means (3) includes an input / output body (47), an elastic force storage body (12), a fixed body (48), a one-way clutch (1).
It is composed of 4) and. An input / output body (47) is rotatably and slidably attached to the crankshaft extension (5), and a one-way clutch (14) and a fixed body (48) are attached to the input / output body (47). 48) slides integrally with the input / output unit (47) but does not rotate, and the input / output unit (4)
An elastic force-storing body (12) is interposed between 7) and the fixed body (48). The one-way clutch (14) is a ratchet mechanism. The input / output body (47) is cylindrical and has a crankshaft extension.
It is attached to (5). A spring is used for the elastic force storage body (12). The fixed body (48) has a bowl shape and is an input / output body.
It is attached to (47). A one-way clutch (24) is provided between the input / output body (47) and the crankshaft extension (5). The one-way clutch (24) includes a rotation locking claw (28), a cup (57) and an engaging portion (29). Rotation locking claw
(28) is attached to the input / output body (47) so that it can be raised and lowered. The cup (57) and the engaging portion (29) are fixed to the front end portion of the crankshaft extension portion (5). Cup (57) is notched
(58) is provided.

The structure of the operating means is as follows. Figure 2
As shown in Fig. 7, the operating means are the brake operating lever (40), the clutch operating lever (17c), and the ratchet pawl operating lever.
(49) and are provided. As shown in FIG. 1, the braking operation lever (40) operates the braking means (45) of the deceleration means (31) by braking. The clutch operating lever (17c) is a power storage means.
Slide (3) back and forth to engage and disengage the energy storage clutch (2). The ratchet pawl operating lever (49) is interlocked with the clutch operating lever (17c) to lift the ratchet pawl (37) with the ratchet locking lever (39) shown in FIGS.

The usage and function of this engine are as follows. The engine is stopped by turning off the ignition switch. Then, the braking operation lever shown in FIG.
(40) operates the braking unit (46) to reduce the speed as shown in FIG.
When the braked part (45) of (31) is braked, the driven gear (43)
The rotation speed of is reduced more than the rotation speed of the crankshaft (1). Then, the clutch operating lever (17c) is used to store energy.
When (3) is moved rearward, the power storage clutch (2) is connected and the ratchet pawl operating lever (49) is interlocked, so that the ratchet pawl locking lever (39) shown in FIG. 4 and FIG.
The ratchet pawl (37) that was lifted by means of falling down, and the one-way clutch (14) is engaged to enter a stored state, whereby the rotational force of the crankshaft (1) is transmitted through the rotation of the input / output body (47). Is stored in the elastic force storage body (12). After the accumulated force of the force accumulating means (3) reaches a predetermined value, the force accumulating means is caused by the slip between the braked portion (45) and the braking portion (46) of the speed reducing means (31).
The excessive storage of (3) is avoided. When the engine is stopped, the accumulated force of the elastic force storage body (12) is applied to the input / output body by the one-way clutch (14).
It is held by stopping the reverse rotation of (47).

To start the engine, turn on the ignition switch,
As shown in FIG. 1, the clutch operating lever (17c) is used to move the power storage means (3) forward. In this case, the accumulator clutch (2) is in the disengaged state, the ratchet pawl operating lever (49) is interlocked, and the ratchet pawl (37) is engaged by the ratchet pawl locking lever (39) shown in FIGS.
Is lifted and the one-way clutch (14) is brought into a non-engaged output state, whereby the stored force of the elastic force storage body (12) rotates the input / output body (47). When the input / output body (47) rotates, the rotation locking claw (28) shown in FIG.
(58) and gets up, and the engaging part (29) shown in FIG.
Engage with. Therefore, the stored force of the elastic force storage body (12) is output to the crankshaft (1) via the crankshaft extension (6). When the engine starts and the rotation speed of the crankshaft (1) exceeds the rotation speed of the input / output body (47), the rotation locking claw (28)
And the engaging part (29) are disengaged, and the rotation engaging claw (28) is pushed down by the engaging part (29), so that the input / output body (47) is rotated from the crankshaft (1). There is no.

The contents of the embodiment of the present invention are as described above, but the present invention is not limited to the above embodiment. For example, the deceleration means (31), the power storage clutch (2) and the power storage means (3) are supported by the crankshaft extension (5),
These are the power take-off shaft extension that projects from the crankcase (4) and the crankshaft (4)
It may be supported by the interlocking shaft or the like driven in (1). Also,
The manual starting means (7) can be connected to the crankshaft extension (5), but it is connected to any one of the crankshaft (1), the power take-off shaft, the power take-out shaft extension and the interlocking shaft. It may be possible.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a main part of an engine according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part of the engine shown in FIG.

3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

5 is a cross-sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

7 is a sectional view taken along line VII-VII of FIG.

8 is a sectional view taken along line VIII-VIII of FIG.

9 is a vertical side view of the engine of FIG.

[Explanation of Codes] (1) ... Crankshaft, (2) ... Power storage clutch, (3) ... Power storage means, (4) ... Crankcase, (5) ... Crankshaft extension,
(6) ... Support shaft, (7) ... Manual starter, (8) ... Drive clutch part, (9) ... Followed clutch part, (10) ... Input body, (1
1) ... Output body, (12) ... Elastic energy storage body, (14) ... One-way clutch, (31) ... Reduction means, (41) ... Drive gear, (42)
... relay gear, (43) ... driven gear, (44) ... relay gear mounting body, (45) ... braked portion, (46) ... braking portion, (47) ... input / output body, (48) ... fixed body.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kiyonobu Iida             3-8 Chikko Shinmachi, Sakai City, Osaka Prefecture             Bota Sakai coastal factory (72) Inventor Seiji Kimoto             3-8 Chikko Shinmachi, Sakai City, Osaka Prefecture             Bota Sakai coastal factory (72) Inventor Makoto Watanabe             3-8 Chikko Shinmachi, Sakai City, Osaka Prefecture             Bota Sakai coastal factory F term (reference) 3J027 FA11 FA36 FB40 GA01 GB03                       GC13 GC22 GD04 GD07 GD13

Claims (8)

[Claims] 1. A crankshaft before stopping when the engine is stopped
The torque of (1) is stored in the power storage means (3), and while the engine is stopped, the power of the power storage means (3) is retained, and when the engine is started,
In a power-accumulation start type engine, which is configured to output the energy stored in the energy storage means (3) to the crankshaft (1), a crankshaft extension portion protruding from the crankcase (4)
(5), the power take-off shaft extension protruding from the crankcase (4) and the crankshaft (1) installed outside the crankcase (4)
One of the interlocking shafts driven by the above is used as the support shaft (6), and the speed reduction means (31) is provided in the input path from the crankshaft (1) to the power storage means (3). ) Is supported by a support shaft (6), a power storage start type engine. 2. The energy-accumulation start-up engine according to claim 1, wherein the energy-storing clutch (2) is supported on the support shaft (6). 3. The energy-storing start type engine according to claim 1 or 2, wherein the energy storage means (3) is supported on the support shaft (6). . 4. The energy-accumulation start type engine according to claim 1, wherein after the energy storage of the energy storage means (3) reaches a predetermined value, the deceleration means
A power storage start type engine, characterized in that the excessive power storage of the power storage means (3) is avoided by the slip of (31). 5. The energy-storing start type engine according to any one of claims 1 to 4, wherein a crankshaft (1), a crankshaft extension (5), a power take-off shaft,
The manual starting means (7) can be connected to any one of the power take-off shaft extension and the interlocking shaft, and the crankshaft can be connected to the crankshaft from the manual starting means (7) without using the energy storage means (3). A power storage start type engine characterized in that (1) can be interlocked. 6. The energy storage starting engine according to claim 5, wherein a recoil starter is provided as the manual starting means (7).
Accumulation start type engine characterized by that. 7. The energy-storing start type engine according to any one of claims 1 to 6, wherein the speed reducing means (31) includes an external tooth drive gear (41) and an external tooth relay gear (42). Driven gear (41) is fixed to the support shaft (6), and the driven shaft (6)
Both the relay gear mounting body (44) and the driven gear (43) are rotatably mounted to the relay gear mounting body (44).
(42) is pivotally supported, and the relay gear (42) is connected to the drive gear (41).
Between the driven gear (43) and the driven gear (43), and the braked portion (45) is fixed to the relay gear mounting body (44).
When 5) is braked by the braking part (46), the relay gear (42) rolls so that the rotation speed of the driven gear (43) is reduced more than the rotation speed of the crankshaft (1). Accumulation start type engine characterized by. 8. The energy storage start type engine according to any one of claims 1 to 7, wherein the energy storage clutch (2) comprises a drive clutch section (8) and a driven clutch section (9). The power storage means (3) comprises an input / output body (47), an elastic power storage body (12), a fixed body (48) and a one-way clutch (14), and the support shaft (6) or the driven gear. Drive clutch part at (43)
(8) is fixed, the input / output body (47) is rotatably and slidably attached to the support shaft (6), the driven clutch portion (9) of this input / output body (47) is fixed, and the input / output body (47) is fixed. The one-way clutch (14) and the fixed body (48) are attached to (47)
(48) slides integrally with the input / output body (47) but does not rotate, and an elastic force storage body (12) is provided between the input / output body (47) and the fixed body (48). If the axial direction of the support shaft (6) is assumed to be the front-rear direction and one of them is assumed to be the rear, and the power storage means (3) is moved rearward when the engine is stopped, the power storage clutch When (2) is in the connected state and the one-way clutch (14) is in the engaged state,
The rotational force of the crankshaft (1) is stored in the elastic power storage body (12) through the rotation of the input / output body (47), and the stored force of the elastic power storage body (12) is unidirectional while the engine is stopped. It is held by stopping the reverse rotation of the input / output body (47) with the clutch (14), and when the power storage means (3) is moved forward when the engine is started, the power storage clutch (2) is in the disengaged state. , The one-way clutch (14) is in the disengaged output state,
A stored power start-up engine, characterized in that the stored power of the elastic storage body (12) is output to the crankshaft (1) through the rotation of the input / output body (47).