JP2005207315A - Recoil starter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recoil starter device which has a low parts-number, can be easily assembled/disassembled, and manufactured at a low cost, does not allow intrusion of foreign matter such as dusts in the inside of the case to impair the function. <P>SOLUTION: The recoil starter device is provided with a recoil-rope-winding reel to be attached to a one-way clutch mounted on a crankshaft of an internal combustion engine, a recoil spring urging the recoil-rope-winding reel to rotate in the direction to rewind the recoil rope, and a case for housing the recoil-rope-winding reel and the recoil spring. A locking hole is made in the center of the recoil-rope-winding reel. An attachment shaft is protrusively provided in the inside face of the case so as to be inserted in the locking hole. The recoil-rope-winding reel is rotatably supported on the shaft. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a recoil starter device used by being mounted on an internal combustion engine, for example, a small internal combustion engine for a radio control.

Conventionally, as such a recoil starter device, for example, a recoil starter device in which a rope wheel is mounted on a pivot shaft provided in a starter housing of an internal combustion engine has been proposed (see Patent Document 1).
Such a recoil starter device has a rope wheel 16 pivoted on a pivot shaft 17, which rope wheel 16 comprises a wound starting rope 18, the pivot shaft 17 being thickened at its free end. Having a portion 24 and at least one longitudinal slot 25 that divides the pivot shaft 17 into at least two elongated shaft segments 26, 27, said thickened portion 24 when the shaft segments are pressed together, the rope wheel 16 The diameter is not larger than the diameter of the central aperture.
JP-A-6-17725

In such a conventional recoil starter device, the flywheel 11 is provided with a starting clasp 13 urged in the central axis direction by an appropriate urging means, and this starting clasp 13 is pivotally mounted on the pivot shaft 17. It is engaged with a bulge 15 protruding in the radial direction provided on the rope wheel 16 formed.
When the starting rope 18 is operated at the time of starting the engine, the rope wheel 16 rotates, and the flywheel 11 fixed to the engine shaft 10 is rotated by the starting clasp 13 engaged with the ledge 15. Yes. After the engine is started, the biasing state of the starting clasp 13 is released by centrifugal force, and the engagement with the ledge 15 is released.

As a result, in such a conventional recoil starter device, all the load required for starting the engine is supported by the rope wheel 16 via the start clasp 13 and the ledge 15 until the engine is started. It acts on the pivot shaft 17 and the casing 20 itself in which the pivot shaft 17 is formed.
Therefore, when there is an eccentricity due to a manufacturing error or attachment error of the rope wheel 16 or an error in the shape and size of the starting clasp 13, an eccentric load generated by the rotation of the rope wheel 16 acts on the pivot shaft 17. It will be.
As a result, the pivot shaft 17 may be damaged due to the occurrence of such an unbalanced load, or problems such as wear of the pivot shaft 17 may occur.
Furthermore, due to the circumstances as described above, when the longitudinal groove 25 is provided in the pivot shaft 17, there is a high possibility that the durability will be lowered when the above-described uneven load is generated.
Therefore, from the viewpoint of eliminating such problems, the present applicant has previously proposed a one-way clutch type recoil starter device in which the rope wheel is not pivotally supported by the pivot shaft (see Patent Document 1). .
JP 2003-254204 A

The recoil starter device according to the prior application includes a reel for wearing a recoil rope that can be attached to a one-way clutch attached to a crankshaft of an internal combustion engine, a recoil spring that biases the reel in a rewinding direction, and the reel and spring. And a case for housing.
Therefore, in the recoil starter device, since the reel for wearing the recoil rope rod is attached to the one-way clutch attached to the crankshaft of the internal combustion engine, the problem as in Patent Document 1 does not occur.

  However, in the recoil starter device according to the prior application, a case mounting shaft protrudes from the center of the recoil rope rod-mounting reel, a locking portion is provided at the tip of the case mounting shaft, and the side surface of the case Since the hole that can lock the locking part by penetrating the case mounting shaft is provided in the center of the part, foreign matter such as dust enters the case from the outside through the hole, and the starter There still existed a defect that there was a possibility of impairing the function of.

  Accordingly, the present invention provides a recoil starter device that is easy to disassemble and assemble, has a small number of parts, and can be manufactured at a low cost, and that there is no possibility that foreign matters such as dust enter the case from the outside and impair the function of the starter. Offering is an issue.

  In order to solve the above-mentioned problem, a recoil starter device according to the present invention as set forth in claim 1 is provided with a recoil rope hook wearing reel that can be attached to a one-way clutch attached to a crankshaft of an internal combustion engine, and wearing the recoil rope hook. A recoil starter device comprising: a recoil spring that urges a reel to rotate in a rewind direction of the recoil rope; and a recoil starter device that houses the recoil rope saddle wearing reel and the recoil spring. A stop hole is provided, and an attachment shaft is provided on the inner surface of the case so as to be inserted into the locking hole and can be rotatably supported by the reel for wearing the recoil rope rod. is there. The one-way clutch includes a one-way bearing.

That is, in the recoil starter device according to the present invention, the recoil rope 捲 wearing reel, the recoil rope attached to the recoil rope 捲 wearing reel, and the urging force to rotate the recoil rope in the rewind direction. A recoil spring, a reel for wearing the recoil rope, and a case for accommodating the recoil spring.
Then, the reel for wearing the recoil rope rod is connected to a one-way clutch attached to the crankshaft of the internal combustion engine so as not to rotate. Note that the reel for wearing the recoil rope rod is connected to the crankshaft of the internal combustion engine so as to rotate and be integrated only in one direction via the one-way clutch and to idle in the opposite direction.
Moreover, the case and the recoil rope scissor reel are assembled by inserting the mounting shaft provided in the case into the engaging hole provided in the recoil rope scissor reel.

Further, in the recoil starter device according to the present invention as set forth in claim 2, the mounting shaft is formed to be hollow, a slit is provided along the length direction of the shaft wall, and a locking portion is provided at the tip thereof. The locking portion is formed in a hook shape that can be inserted into the locking hole portion and locked.
That is, in the recoil starter device according to the present invention, the mounting shaft is hollow and has a slit so that it can be elastically deformed in the radial direction to reduce the diameter of the locking portion. Further, since the locking portion provided at the tip of the mounting shaft is formed in a hook shape, it engages with the locking hole and is prevented from coming off.

  According to a third aspect of the present invention, there is provided a recoil starter device in which the reel for wearing the recoil rope is formed in a substantially cylindrical shape as a whole, and is provided with a crank bearing concave portion provided in the axial direction and a recoil provided on the peripheral surface portion. A rope attachment portion, and a recoil spring housing portion that is provided on the opposite side in the axial direction with respect to the crank bearing concave portion, and that can accommodate a recoil spring, and the locking hole portion is provided at a center of rotation in the recoil spring housing portion. The recoil spring is housed in the recoil spring accommodating portion in a state where an end portion of the recoil spring is engaged with a slit of an attachment shaft that is inserted into and engaged with the engagement hole portion.

  That is, in the recoil starter device according to the present invention, the crankshaft and the recoil are engaged by engaging the one-way clutch attached to the crankshaft of the internal combustion engine with the crank bearing recess provided in the reel for wearing the recoil rope rod. A rope rod wearing reel is connected via a one-wichi clutch. Further, the recoil rope is wound and held around the recoil rope anchoring portion provided on the peripheral surface portion of the recoil rope anchoring reel. A recoil spring formed in a spiral shape is accommodated in a recoil spring accommodating portion provided on the opposite side in the axial direction with respect to the crank bearing recess. The mounting shaft is disposed at the center of the recoil spring housing, and the inner end of the recoil spring is locked and fixed to the slit of the mounting shaft.

In the recoil starter device according to the present invention as set forth in claim 4, the mounting shaft has a shaft main body portion and a locking portion provided at the tip of the shaft main body portion, and the diameter of the shaft main body portion is Formed smaller than the diameter of the locking hole, the locking portion has a taper that expands toward the base end of the shaft body,
The locking portion is formed such that the maximum diameter is larger than the diameter of the locking hole portion and can be compressed in the radial direction through the slit, and the maximum diameter of the locking portion when compressed in the radial direction. Is formed smaller than the diameter of the locking hole.

  In other words, in the recoil starter device according to the present invention, the mounting shaft allows the locking portion to be inserted into the locking hole portion. And in the case of the insertion, it carries out by compressing the diameter of the said latching | locking part to a radial direction through the said slit. The compression can be performed by pressing a taper provided in the locking portion against the periphery of the locking hole.

  According to a fifth aspect of the present invention, the recoil starter device according to the present invention can reduce the diameter of the locking portion to be smaller than the diameter of the locking hole portion by sandwiching the tip end locking portion of the mounting shaft with a tool. A dent or notch is provided.

  That is, in the recoil starter device according to the present invention, the diameter of the locking portion can be reduced by sandwiching the recess or notch of the locking portion with a tool such as pliers.

A recoil starter device according to a first aspect of the present invention includes a recoil rope rod wearing reel that can be attached to a one-way clutch attached to a crankshaft of an internal combustion engine, and the recoil rope rod wearing reel. Since it is configured with a recoil spring that urges it to rotate in the direction, and a case that houses the recoil rope heel reel and recoil spring, it has fewer parts than conventional products, and is easy to disassemble and assemble, There is an advantage that it can be manufactured at low cost.
In addition, a locking hole is provided at the center of the recoil rope scissor reel, and the recoil rope scissor reel is rotatably supported while being inserted into the locking hole on the inner surface side of the case. Since the shaft protrudes, there is no hole in the case, so there is no possibility that foreign matters such as dust enter the case through the hole from the outside of the case. Therefore, it is possible to completely prevent the starter function from being damaged by the invading foreign matter.

  Further, in the recoil starter device according to the second aspect of the present invention, the mounting shaft is formed hollow, a slit is provided along the length direction of the shaft wall, and a locking portion is provided at the tip thereof. Since the engaging portion is formed in a hook shape that can be inserted into the engaging hole portion and locked, the recoil rope can be worn only by inserting the mounting shaft into the engaging hole portion. Since the case can be assembled to the reel, the assembling work can be made extremely simple and easy, and productivity can be improved.

  According to a third aspect of the present invention, there is provided a recoil starter device in which the reel for wearing the recoil rope is formed in a substantially cylindrical shape as a whole, and is provided with a crank bearing concave portion provided in the axial direction and a recoil provided on the peripheral surface portion. A rope attachment portion, and a recoil spring housing portion that is provided on the opposite side in the axial direction with respect to the crank bearing concave portion, and that can accommodate a recoil spring, and the locking hole portion is provided at a center of rotation in the recoil spring housing portion. Since the recoil spring is housed in the recoil spring accommodating portion with its end portion being engaged with the slit of the mounting shaft that is inserted into and engaged with the engagement hole portion, the recoil spring is accommodated in the recoil rope. Easy to urge to assemble the reel to be worn and rotate the reel to rewind the recoil rope. It made. Therefore, assembly work is facilitated and productivity is improved.

Further, in the recoil starter device according to the present invention as set forth in claim 4, the mounting shaft has a shaft main body portion and a locking portion provided at the tip of the shaft main body portion, and the diameter of the shaft main body portion is Formed smaller than the diameter of the locking hole, the locking portion has a taper that expands toward the base end of the shaft body,
The locking portion is formed such that the maximum diameter is larger than the diameter of the locking hole portion and can be compressed in the radial direction through the slit, and the maximum diameter of the locking portion when compressed in the radial direction. Is formed smaller than the diameter of the locking hole, so that when the locking part of the mounting shaft is inserted into the locking hole, the taper provided in the locking part is locked into the locking hole. If it is inserted while being pressed against the periphery of the part, the diameter of the locking part is compressed in the radial direction through the slit, and the insertion is easily performed. , Improve productivity.

  According to a fifth aspect of the present invention, the recoil starter device according to the present invention can reduce the diameter of the locking portion to be smaller than the diameter of the locking hole portion by sandwiching the tip end locking portion of the mounting shaft with a tool. Since the recess or notch is provided, the diameter of the lock is reduced to be smaller than the diameter of the lock hole by sandwiching the recess or notch of the lock with a tool such as pliers. Therefore, the case can be easily removed from the reel mounted on the recoil rope.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, a recoil starter device 1 according to this embodiment includes a recoil rope rod wearing reel 5 that can be attached to a one-way clutch 4 attached to a crankshaft 3 of an internal combustion engine 2, as shown in FIGS. A recoil spring 7 that urges the recoil rope scooping reel 5 to rotate in the rewind direction of the recoil rope 6, and a case 8 that houses the recoil rope scooping reel 5 and the recoil spring 7. A locking hole portion 9 is provided at the center of the rope rod wearing reel 5 and is inserted into the locking hole portion 9 on the inner surface side of the side surface portion 10 of the case 8 and the recoil rope rod wearing reel 5 rotates. A mounting shaft 11 that can be supported is projected.
As shown in FIGS. 1 and 2, the mounting shaft 11 is formed hollow, and a slit 13 is provided along the length direction of the shaft wall 12, and a locking portion 14 is provided at the tip thereof. The locking portion 14 is formed in a hook shape that can be inserted into the locking hole 9 and locked.
As shown in FIGS. 1 and 2, the reel 5 for the recoil rope kite is formed in a substantially cylindrical shape as a whole, and has a crank bearing recess 15 provided in the axial direction and a recoil rope kite provided on the peripheral surface portion. The attachment portion 16 and a recoil spring storage portion 17 that is provided on the opposite side in the axial direction with respect to the crank bearing recess portion 15 and can store the recoil spring 7. The locking hole portion 9 is formed in the recoil spring storage portion 17. The recoil spring 7 is housed in the recoil spring accommodating portion 17 in a state where the end portion of the recoil spring 7 is engaged with the slit 13 of the mounting shaft 11 which is inserted into the engaging hole portion 9 and engaged. Yes.
As shown in FIGS. 1 and 2, the mounting shaft 11 includes a shaft main body 18 and a locking portion 14 provided at the tip of the shaft main body 18, and the diameter of the shaft main body 18. Is formed smaller than the diameter of the locking hole portion 9, and the locking portion 14 has a taper 19 that expands toward the base end portion of the shaft body portion 18,
The locking portion 14 is formed so that its maximum diameter is larger than the diameter of the locking hole portion 9 and can be compressed in the radial direction through the slit 13, and the locking portion when compressed in the radial direction. The maximum diameter of 14 is formed smaller than the diameter of the locking hole 9.
Further, as shown in FIG. 3, the tip locking portion 14 of the mounting shaft 11 has a recessed portion that can be reduced by making the diameter of the locking portion 14 smaller than the diameter of the locking hole portion 9 by being sandwiched by a tool. 20 or a notch is provided.

  As shown in FIGS. 1 and 2, the recoil starter device 1 according to the present embodiment shown in the figure is configured to include a recoil rope scooping reel 5, a recoil rope 6, a recoil spring 7, and a case 8. ing.

  As shown in FIGS. 1 and 2, the recoil rope rod-mounting reel 5 is made of a hard synthetic resin and is formed in a substantially cylindrical shape as a whole, and a crank bearing recess 15 having a hexagonal cross section is formed at the inner end thereof. It is provided in the axial direction.

  As shown in FIG. 1, a one-way clutch 4 attached to the crankshaft 3 of the internal combustion engine 2 is inserted into the crank bearing recess 15. The one-way clutch 4 is also formed in a hexagonal cross section and is inserted into the crank bearing recess 15 so as to be non-rotatably engaged with the recoil rope rod-mounting reel 5.

  Since the one-way clutch 4 rotates in one direction with respect to the crankshaft 3 and cannot rotate in the opposite direction, the recoil rope rod-retaining reel 5 connected to the crankshaft 3 through the one-way clutch 4 is also a crankshaft. 3 is connected so as to rotate in one direction only and to rotate in the opposite direction.

  As shown in FIGS. 1 and 2, a recoil rope anchoring portion 16 is provided on the peripheral surface portion of the recoil rope anchoring reel 5. That is, the flange portions 21 and 22 project from the inner end vicinity and the outer end of the peripheral surface portion of the recoil rope rod-mounting reel 5, and the recoil rope rod-mounting reel 5 is formed between the inner and outer rod portions 21 and 22. ing. A hole 23 is formed at the base of the inner flange 21.

  As shown in FIG. 1 and FIG. 2, a recoil rope 6 is attached to the recoil rope tacking reel 5. The base end portion of the recoil rope 6 is extended from the hole 23 to the outside of the flange portion 21 to form a knot 24, and the knot 24 is locked to the edge of the hole 23. The recoil rope 6 is wound several times around the recoil rope rod-mounting reel 5 so that the tip portion is formed as a free end portion, and a handle for pulling (not shown) at the time of activation is fixed to the tip portion.

  Further, as shown in FIGS. 1 and 2, a recoil spring housing portion 17 is provided on the recoil rope rod wearing reel 5 on the opposite side in the axial direction with respect to the crank bearing recess 15. That is, a ring-shaped rib 25 projecting sideways is provided on the outer peripheral edge of the outer flange 22 provided on the peripheral surface of the recoil rope rod-mounting reel 5, and the recoil spring housing portion 17 is provided inside the ring-shaped rib 25. Is formed.

  As shown in FIGS. 1 and 2, the recoil spring housing portion 17 is formed in a laterally concave shape having a side opening, and the locking hole portion 9 is formed at the center of the back wall portion 26. The locking hole 9 is formed to open to the crank bearing recess 15.

  The recoil spring 7 is formed in a spiral shape using the recoil spring accommodating portion 17 as a raw material, and is accommodated in the recoil spring accommodating portion 17 as shown in FIGS.

  As shown in FIGS. 1 and 2, the case 8 is formed of a hard synthetic resin as a material and is formed in a substantially horizontal cylindrical cap shape having an inner side opened and an outer side closed by a side surface portion 10. The mounting shaft 11 is integrally provided on the inner surface side of the side surface portion 10 so as to protrude inward.

  As shown in FIGS. 1 and 2, the mounting shaft 11 is formed in a hollow shape, and includes a shaft main body portion 18 and a locking portion 14 provided at the tip of the shaft main body portion 18. The locking portion 14 is formed in a hook shape and has a taper 19 that expands toward the proximal end portion of the shaft main body portion 18. Further, the mounting shaft 11 is provided with a slit 13 in the shaft wall 12 along the length direction.

  As shown in FIGS. 1 and 2, the diameter of the shaft main body 18 in the mounting shaft 11 is smaller than the diameter of the locking hole 9 provided in the recoil rope wearing reel 5. .

  Further, as shown in FIGS. 1 and 2, the locking portion 14 of the mounting shaft 11 has a maximum diameter larger than the diameter of the locking hole portion 9 and is compressed in the radial direction through the slit 13. The maximum diameter of the locking portion 14 is formed smaller than the diameter of the locking hole 9 when compressed in the radial direction.

As shown in FIG. 1, the mounting shaft 11 is inserted into the locking hole portion 9, and the tip locking portion 14 is locked to the edge of the locking hole portion 9, so that the case 8 is connected to the recoil rope cage. It is assembled to the wear reel 5. And the reel 5 for the recoil rope rod is rotatably supported on the mounting shaft 11.
After the mounting, the recoil rope tackle reel 5 is connected to the crankshaft 3 via the one-way clutch 4, so that the recoil rope tackle reel 5 is locked to the mounting shaft 11. There is no. Therefore, after the attachment shaft 11 is attached to the internal combustion engine 2, the attachment shaft 11 does not function in cooperation with each other in the relationship with the recoil rope rod wearing reel 5.

When the mounting shaft 11 is inserted into the locking hole portion 9, as shown in FIG. 1, the mounting shaft 11 passes through the central portion of the recoil spring 7 housed in the recoil spring housing portion 17. The inner end portion of the recoil spring 7 is inserted and locked into the slit 13 of the mounting shaft 11.
The outer end portion of the recoil spring 7 is fixed to the annular rib 25 in the recoil spring housing portion 17.

  As shown in FIGS. 1 and 2, the case 8 is provided with a flange portion 27 on the outer surface of the opening side end portion. The flange portion 27 is provided with a mounting hole 28, and the mounting hole 28 is used. The case 8 can be fixed to the housing of the internal combustion engine 2 by screws or the like.

  A free tip of the recoil rope 6 penetrates the case 8 from an opening (not shown) provided in the case 8. Then, by pulling a handle (not shown) fixed to the free end of the recoil rope 6, the crankshaft 3 is rotated via the recoil rope saddle 5 and the one-way clutch 4. Can be started. Further, when the hand is released from the recoil rope 6, the recoil rope 7 wearing reel 5 is rotated in the reverse direction by the recoil spring 7 and the recoil rope 6 is rewound.

When disassembling the recoil starter device 1, it is necessary to remove the recoil starter device 1 from the internal combustion engine 2 and remove the case 8 from the recoil rope rod-mounting reel 5. In that case, it is necessary to let the front end locking portion 14 of the mounting shaft 11 escape from the locking hole portion 9. In order to allow the distal end locking portion 14 of the mounting shaft 11 to escape from the locking hole portion 9, it is necessary to reduce the outer diameter of the locking portion 14 to be smaller than the inner diameter of the locking hole portion 9.
As shown in FIGS. 1 to 3, the locking portion 14 is formed with recessed portions 20 at two locations on the opposite side of the outer surface portion. Therefore, the outer diameter of the locking portion 14 can be easily reduced by sandwiching the two recessed portions 20 with the tip of the pliers, and the locking portion 14 can be easily escaped from the locking hole portion 9.

  The recoil starter device of the present invention is applicable to an internal combustion engine in which a one-way clutch is attached to a crankshaft.

It is sectional drawing of the state attached to the internal combustion engine. It is sectional drawing of the state decomposed | disassembled. It is a tip top view of an attachment axis.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recoil starter apparatus 2 Internal combustion engine 3 Crankshaft 4 One-way clutch 5 Recoil rope wearing reel 6 Recoil rope 7 Recoil spring 8 Case 9 Locking hole 10 Side surface 11 Mounting shaft 12 Shaft wall 13 Slit 14 Locking portion 15 Crank bearing recess 16 Recoil rope attachment part 17 Recoil spring storage part 18 Shaft body part 19 Taper 20 Recess part 21 Recess part 21 Reinforcement part 23 Hole 24 Knot 25 Ring-shaped rib 26 Back wall part 27 Flange part 28 Mounting hole

Claims (5)

A reel for wearing a recoil rope that can be attached to a one-way clutch attached to a crankshaft of an internal combustion engine, a recoil spring that urges the reel for wearing the recoil rope to rotate in a rewind direction of the recoil rope, and the recoil rope In a recoil starter device comprising a wearing reel and a case for storing a recoil spring,
A locking hole portion is provided at the center of the recoil rope rod-mounting reel, and an attachment shaft that is inserted into the locking hole portion on the inner surface side of the case and can be rotatably supported by the recoil rope rod reel. A recoil starter device characterized in that it is protruded.   The mounting shaft is formed hollow, a slit is provided along the length direction of the shaft wall, a locking portion is provided at the tip, and the locking portion is inserted into the locking hole. 2. The recoil starter device according to claim 1, wherein the recoil starter device is formed in a hook shape that can be locked. The reel for wearing the recoil rope is generally formed in a substantially cylindrical shape, and is axially opposite to the crank bearing recess provided in the axial direction, the recoil rope brace provided in the peripheral surface portion, and the crank bearing recess. A recoil spring storage portion provided on the side and capable of storing a recoil spring;
The locking hole portion is established at the center of rotation in the recoil spring storage portion,
3. The recoil spring is housed in the recoil spring housing portion in a state in which an end portion of the recoil spring is engaged with a slit of an attachment shaft that is inserted into and engaged with the locking hole. Recoil starter device. The mounting shaft includes a shaft main body portion and a locking portion provided at a tip of the shaft main body portion, and the diameter of the shaft main body portion is smaller than the diameter of the locking hole portion. The part has a taper that expands toward the base end of the shaft body part,
The locking portion is formed such that the maximum diameter is larger than the diameter of the locking hole portion and can be compressed in the radial direction through the slit, and the maximum diameter of the locking portion when compressed in the radial direction. 4. The recoil starter device according to claim 1, wherein the recoil starter device is formed smaller than a diameter of the locking hole portion.   The tip locking portion of the mounting shaft is provided with a recess or a notch that can be reduced by a tool to reduce the diameter of the locking portion to be smaller than the diameter of the locking hole. Item 5. The recoil starter device according to Item 1, 2, 3 or 4.

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