KR100932425B1 - Structure of small engine starter - Google Patents

Abstract

The present invention relates to a small engine starter for use in small agricultural machinery, portable leisure sporting goods and mini-scooter, etc., one side of the engine side is open and hollow housing, rotatably coupled to the inside of the housing and wound groove on the outer peripheral surface The reel is formed, the acceleration means provided to the inside of the reel to accelerate the rotation, the rope is wound along the winding groove and provided with a handle at one end protruding out of the housing, the rotational force generated when the rope is pulled the engine It comprises a transmission means for transmitting to and return means for accumulating a portion of the generated rotational force.

The present invention configured as described above does not require a large force at the initial start of the engine, and the more the centrifugal force of the reel increases as the rope is pulled, the engine can be easily started. In addition, the structure is simple, easy to produce and repair, the small volume does not interfere with the installation of the engine peripherals.

Starter, Reel, Rope, Accelerator, Drive, Return, Rack, Pinion

Description

AUTOMATIC STARTER STRUCTURE FOR SMALL SIZE ENGINE}

The present invention relates to a structure of a starter device for a small engine, and more particularly, to a starter device for a small engine that is simple in structure, light in weight, and easily started with a small force.

In general, a device using a small engine, such as small agricultural machinery, portable leisure sports equipment and mini-scooter, is equipped with a recoil starter for its start. This recoil starter is a device that starts the engine while the crankshaft of the engine connected thereto rotates by pulling the rope wound on the reel.

9 and 10 are exploded perspective views showing a conventional recoil starter, referring to the drawings as follows.

The conventional recoil starter includes a housing 20 mounted at the front end of the crankshaft 12 of the engine 10, a reel 30 rotatably coupled to the inside of the housing 20, and the reel 30. A rope 40 wound around the outer circumferential surface thereof and exposed to the outside through one end of the housing 20, a recoil spring 50 that accumulates rotational force generated when the rope 40 is pulled, and the crankshaft 12. It is configured to include a rotor (60) for rotating the engine in contact with the reel (30) provided at the tip.

Here, protrusions 32 and 34 are formed on the front and rear surfaces of the reel 30, respectively, and coupling grooves 36 to which one end of the recoil spring 50 is fixed are formed on the outer circumferential surface of the front protrusion 32. On the outer circumferential surface of the rear protrusion 34, a rotating protrusion 38 is in contact with the rotor 60. In addition, the rotor 60 is provided with a ratchet 62 in contact with the rotating projection 38 when the rope 40 is pulled.

In the conventional recoil starter configured as described above, the reel 30 rotates when the rope 40 is pulled using the handle 42 provided at one end, and the revolving protrusion 38 ratchets 62 as the reel 30 rotates. The engine 10 is started by rotating the crankshaft 12 in contact with. At this time, the recoil spring 50 accumulates the rotational force generated when the rope 40 is pulled.

On the other hand, when the rope 40 is released after the engine 10 is started, the reel 30 is rotated in the reverse direction by the rotation force accumulated in the recoil spring 50 and the rope 40 is wound to return to the original position. . However, since the ratchet 62 is extended by the centrifugal force generated when the engine 10 rotates, the ratchet 62 does not come into contact with the rotary protrusion 38, and thus no interference occurs.

By the way, the conventional recoil starter takes a large force at the beginning of the start, that is, when starting to pull the rope 40, especially in the case of a large engine of capacity, so it is not easy to start. In addition, the complex configuration is difficult to produce and repair, and due to the large volume there is a disadvantage that protrudes to the outside of the engine to interfere with the peripheral device.

The present invention is to solve the above-mentioned problems do not require a large force in the initial start of the engine and provides a small engine starting device that makes it easy to start the engine by increasing the centrifugal force of the reel as you pull the rope The purpose is.

In addition, another object of the present invention is to provide a starter device for a small engine that is simple in structure and easy to produce and repair, and small in size, so that the installation does not interfere with the engine peripherals.

A starter device for a small engine according to the present invention for achieving the above object is a housing in which one side of an engine side is open and hollow, a reel rotatably coupled to an inside of the housing, and a winding groove is formed on an outer circumferential surface of the reel. Acceleration means provided inside to accelerate the rotation, the rope is wound along the winding groove and provided with a handle at one end protruding out of the housing, the transmission means for transmitting the rotational force generated when the rope is pulled to the engine and generated And a return means for accumulating a part of the rotational force.

Among the above-mentioned components, the acceleration means may include a fixed shaft formed at an inner center of the reel, a guide rail formed radially with respect to the fixed shaft, a weight that is movably coupled along the guide rail, a fixed shaft and Characterized in that it comprises a spring provided between the weight.

In addition, the transmission means is an inner drum provided in the center of one side of the reel, an outer drum spaced a predetermined distance from the inner drum, and a slider positioned between the inner and outer drum and protrudes in the axial direction when the inner drum rotates. Characterized in that configured.

In addition, the return means is characterized in that it comprises a pinion gear provided in the center of the other side of the reel, a rack gear meshing with the pinion gear, and a spring for fixing one end of the rack gear to the housing.

Starting device for a small engine according to the present invention does not require a large force at the initial start of the engine, and as the centrifugal force is increased by the weight as the rope is pulled, the engine can be easily started. In addition, since the transmission means of the starter device for a small engine according to the present invention contacts the engine in a manner similar to a friction clutch, there is little possibility of being damaged. In addition, the structure is simple, easy to produce and repair, and the small volume does not interfere with the engine peripherals when installed.

With reference to the accompanying drawings will be described embodiments of the present invention;

1 is a perspective view showing a starter for a small engine according to the present invention, Figure 2 is an exploded perspective view showing a starter for a small engine according to the present invention.

As shown in Figure 1 and 2, the starter device 100 for a small engine according to the present invention, the housing 110, the reel 120 is rotatably coupled to the inside of the housing 110, a view Although not shown in the acceleration means (130 of FIG. 3) is provided inside the reel 120, the rope 140 wound on the reel 120, the transmission means 150 and the housing provided on the front of the reel 120 It comprises a return means 160 provided between the gong 110 and the reel 120.

Looking at each of the above-described components (110 to 160) in more detail, first, the housing (110) is a cylinder in the form of open only one side of the engine, the hollow so that each of the components (120 to 160) can be built Is formed. A pair of mounting grooves 112 and 114 protrude in opposite directions on both sides of the housing 110, and a through hole 116 is formed on an outer circumferential surface thereof. At this time, the seating grooves 112 and 114 are moving spaces of the rack gear 164 of the return means 160 to be described later. In addition, the through hole 116 is a portion into which the rope 140 is inserted, and one end of the rope 140 inserted into the through hole 116 is fixed to the reel 120.

The rope 140 is a means for applying rotational force to the reel 120, one end of which is fixed to the reel 120 as described above, wound along the reel 120 and through the through hole 116 Exposed to the outside. And the other end of the rope 140 is provided with a handle 142 for rotating the reel 120 by pulling the 140. At this time, the rope 140 is preferably a rope made of cotton, hemp, synthetic fibers, etc., it is most preferable that the wire rope is made of twisted steel wire with a fiber core to increase the strength.

On the other hand, the reel 120, the acceleration means 130, the transmission means 150 and the return means 160 will be described with reference to FIGS.

3 is an exploded perspective view showing the reel and the acceleration means of the starter for a small engine according to the present invention, the reel 120 is rotatably coupled to the interior of the housing (110 of FIG. 2) has a predetermined thickness In the shape, the winding groove 122 is formed along the outer circumferential surface so that the rope (140 of FIGS. 1 and 2) can be wound. And the inside of the reel 120 is formed in a hollow so that the acceleration means 130 is located.

The acceleration means 130 has a fixed shaft 132 formed in the inner center of the reel 120, four guide rails 134 formed radially with respect to the fixed shaft 132, and the guide rail 134 A weight 136 is movably coupled along the) and a spring 138 provided between the fixed shaft 132 and the weight 136 to elastically connect them (132, 136).

Acceleration means 130 of this configuration is a device for accelerating the rotation of the reel (120). That is, when the reel 120 rotates, the weight 136 moves to the edge along the guide rail 134, thereby increasing the centrifugal force of the reel 120 to accelerate the rotation. On the other hand, when the reel stops, the weight 136 is returned to the original position by the elasticity of the spring 138.

As a result, when the acceleration means 130 of the above-described configuration is used, a large amount of power is not required at the beginning of the engine startup, and more rotation is applied to the engine at the end of the engine startup to increase the starting efficiency.

Figure 4 is an exploded perspective view showing the power transmission means of the starter device for a small engine according to the present invention, the power transmission means 150 provided on the front of the reel 120 is the engine ( The inner drum 152 provided at the center of one surface of the reel 120, the outer drum 154 spaced a predetermined distance from the inner drum 152, and the inner and outer drums as a means for transmitting to the reel (120) And a slider 156 positioned between 152 and 154 and protruding in the axial direction upon rotation of the inner drum 152. In this case, spiral grooves 153 are formed at upper and lower portions of the outer circumferential surface of the inner drum 152, guide protrusions 155 are formed at both sides of the inner circumferential surface of the outer drum 154, and the slider 156 is provided. The inner circumferential surface and the outer circumferential surface of the locking projection 157 and the guide groove 159 corresponding to the spiral groove 153 and the guide protrusion 155 are formed, respectively.

Looking at the power (rotational power) transmission process of the above-described transmission means 150 is as follows.

First, when the reel 120 is rotated by pulling a rope (140 of FIGS. 1 and 2), the outer drum 154 integrally formed with the 120 rotates and rotates the slider 156 together. That is, the guide protrusion 155 of the external drum 154 is inserted into the guide groove 159 of the slider 156 to rotate the slider 156. At this time, the locking protrusion 157 formed on the inner circumferential surface of the slider 156 moves along the spiral groove 153 of the inner drum 152. The slider 156 protrudes toward the engine and contacts the crankshaft to apply power. Will be delivered.

On the other hand, the slider 156 in the same role as the friction clutch rotates the engine by the friction force of the contact pad 158 and the crankshaft in a predetermined thickness on the front surface, that is, one surface in contact with the engine. At this time, the contact pad 158 is a kind of dry clutch, it is preferable that the copper plate is easy to heat.

5 and 6 are exploded perspective views showing the return means of the starter device for a small engine according to the present invention.

5 and 6, the return means 160 is a means for accumulating a part of the rotational force generated when the reel 120 is rotated, the pinion gear 162 is provided in the center of the rear surface of the reel 120 And a rack gear 164 meshing with the pinion gear 162, a spring 166 for fixing the rack gear 164 to the housing, and a rack gear 164 provided on the bottom surface of the housing 164. Consists of a guide rail 168 for guiding the moving direction of the.

When the reel 120 is rotated by pulling the rope (140 of FIGS. 1 and 2), the return means 160 configured as described above rotates together with the pinion gear 162 integrally formed with the 120 and the rack gear 164. ) Is moved toward the first seating groove 112. At this time, the rack gear 164 moves along the guide rail 168, the spring 166 for fixing the rack gear 164 to the housing is extended and accumulates a portion of the rotational force.

On the other hand, when the rope (140 of Figs. 1 and 2) is released in the state in which the spring 166 is extended by the rotation force as described above, the spring 166 contracts and the rack gear 164 is placed in the second seating groove 114. Direction, so that the pinion gear 162 and the reel 120 rotate in the reverse direction and return to their original position.

7 and 8 are views illustrating a starting process using a starter device for a small engine according to the present invention. Referring to FIGS. 7 and 8, the starting process is as follows.

First, referring to FIG. 7, when the rope 140 is pulled using the handle 142, the reel 120 rotates in the direction of the first arrow 200, and an external drum formed integrally therewith ( 154 and slider 156 rotate together. At this time, the locking protrusion 157 formed on the inner circumferential surface of the slider 156 moves along the spiral groove 153 of the inner drum 152. The slider 156 protrudes toward the engine and contacts the crankshaft to apply power. (See FIG. 4). At the same time, the pinion gear 162 integrally formed with the reel 120 is also rotated, and the rack gear 164 is moved in the direction of the first seating groove 112, and the spring 166 is extended to accumulate a part of the rotational force. do.

On the other hand, when the rope 140 is released in the pulled state as shown in FIG. 8, when the rope 140 is released in the pulled state as described above, the spring 166 contracts and the rack gear 164 is seated in the second seating groove 114. Direction, so that the pinion gear 162 and the reel 120 rotate in the reverse direction, that is, the second arrow direction 300, and return to the initial position, while the rope 140 is connected to the reel 120. It is wound. In addition, the slider 156 is separated from the engine and returned to the initial position in the reverse order of the above-described process.

Starting device 100 for a small engine according to the present invention as described above does not require a large force at the initial start of the engine and can increase the starting efficiency of the engine by increasing the centrifugal force of the reel as you pull the rope. In addition, since the recoil spring is not used, the structure is simple and easy to produce and repair, and the volume is small so that the installation does not interfere with the engine peripherals.

Although the configuration and start-up process of the starter device for a small engine according to a preferred embodiment of the present invention have been shown in accordance with the above description and drawings, this is merely an example, and various changes without departing from the technical spirit of the present invention. And those skilled in the art will appreciate that changes are possible.

1 is a perspective view showing a starting device for a small engine according to the present invention.

Figure 2 is an exploded perspective view showing a start device for a small engine according to the present invention.

Figure 3 is an exploded perspective view showing a reel and the acceleration means of the starter device for a small engine according to the present invention.

Figure 4 is an exploded perspective view showing a power transmission means of the starter device for a small engine according to the present invention.

5 and 6 are perspective views showing the return means of the starter device for a small engine according to the present invention.

7 and 8 are views showing the starting process using the start device for a small engine according to the present invention.

9 and 10 are exploded perspective views showing a conventional recoil starter.

* Description of the symbols for the main parts of the drawings *

100: starter device for small engine 110: housing

120: reel 130: acceleration means

140: rope 150: power transmission means

160: return means

Claims (8)

A housing in which one side of the engine side is open and hollow; A reel rotatably coupled to the inside of the housing and having a winding groove formed on an outer circumferential surface thereof; Acceleration means provided in the reel to accelerate the rotation thereof; A rope wound along the winding groove and provided with a handle at one end protruding to the outside of the housing; Transmission means for transmitting a rotational force generated when the rope is pulled to the engine; And A return means for accumulating a part of the generated rotational force, wherein the acceleration means includes a fixed shaft formed at an inner center of the reel, a guide rail radially formed with respect to the fixed shaft, and movable along the guide rail. A starter device for a small engine, comprising a weight coupled to each other, and a spring provided between the fixed shaft and the weight. The method of claim 1, The transmission means comprises an inner drum provided at the center of one side of the reel, an outer drum spaced a predetermined distance from the inner drum, and a slider positioned between the inner and outer drums and protruding in an axial direction when the inner drum rotates. Small engine starter characterized in that. The method of claim 2, Spiral grooves are formed on the outer circumferential surface of the inner drum, guide protrusions are formed on the inner circumferential surface of the outer drum, and engaging protrusions and guide grooves corresponding to the spiral grooves and guide protrusions are formed on the inner and outer circumferential surfaces of the slider, respectively. Small engine starter characterized in that. The method of claim 3, wherein The return means includes a pinion gear provided at the center of the other side of the reel, a rack gear engaged with the pinion gear, and a spring for fixing one end of the rack gear to the housing. The method of claim 4, wherein The starter device for a small engine, characterized in that the contact pad is provided on the front of the slider of the transmission means. The method of claim 5, wherein The contact pad is a starter device for a small engine, characterized in that it comprises a copper plate. The method of claim 6, A starter device for a small engine, characterized in that the guide rail is provided on the bottom surface of the housing. The method of claim 7, wherein Starting device for a small engine, characterized in that the mounting groove protrudes on both sides of the housing.

Images