JP4340712B2 - Governor equipment - Google Patents

Description

The present invention relates to a governor device used for an internal combustion engine such as a diesel engine.

  Conventionally, a technique in which a centrifugal governor device is provided in a diesel engine is known. The centrifugal governor device is configured such that a governor shaft is rotationally driven via a gear or the like from a crank gear provided on the crankshaft. A governor weight is fitted on the governor shaft, and the governor weight is slid. The governor lever is connected to a governor lever through a moving body, and the governor lever is interlocked with a control lever for adjusting the fuel of the fuel injection pump (see, for example, Patent Document 1).

  In such a configuration, when the engine is started, the engine is rotated at the set rotational speed. After that, when the engine speed is higher than the set rotational speed, the governor weight is opened by centrifugal force and the sliding body slides, and the governor lever is rotated. The control lever is moved to the rotational speed decreasing side to reduce the injection amount of the fuel injection pump. Conversely, when the rotational speed decreases and the centrifugal force applied to the governor weight decreases, the spring biased in the reverse direction It was closed and the control lever of the fuel injection pump was moved to the increase side so that the engine speed was operated at the set speed.

JP 2003-27966 A

  In the conventional governor device, the governor lever is in contact with the first lever connected to the control lever, the second lever for restricting the rotation of the first lever to a predetermined range by the restricting portion, and the limiter. It consisted of a third lever that allowed the amount of increase to be adjusted. However, since the governor lever has a structure composed of three levers, the number of parts is increased, the cost is increased, and the number of processing steps is increased.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

The governor lever (15) is interlocked with the governor weight (11), the first lever (16) for adjusting the injection amount of the fuel injection pump, and the rotation of the first lever (16) is restricted to a predetermined range, In the governor device constituted by the second lever (17) connected to the rotation speed setting lever (20), the bearing portion (16a) of the first lever (16) is rotatably supported on the governor lever shaft (18). The second lever (17) is provided with bearing portions (17a) on both sides of the bearing portion (16a) of the first lever (16), and at least one bearing portion (17a) of the second lever (17) is provided. A spring (22) fixed to the governor lever shaft (18) and biasing the first lever (16) to the side between the first lever (16) and the second lever (17) to increase the fuel at the start. And the spring (22) A double torsion coil having two coil portions (22a, 22a) is arranged, and the two coil portions (22a, 22a) are arranged on both sides of the first lever (16), and one end of the spring (22) is arranged. A hook (17d) to be locked is formed integrally with the second lever (17), and the hook (17d) forms a tongue-like portion on a part of the second lever (17). The hook (17d) is bent in a "<" shape in plan view, the hook (17d) is opened toward the opposite side of the first lever (16), and one end of the spring (22) is locked. Is also used as a portion for restricting the rotation of the first lever (16) of the second lever (17) .

  As effects of the present invention, the following effects can be obtained.

The governor lever (15) rotates in a predetermined range by adjusting the injection amount of the fuel injection pump in conjunction with the governor weight (11) and the rotation of the first lever (16) within a predetermined range. In the governor device constituted by the second lever (17) connected to the number setting lever (20), the bearing (16a) of the first lever (16) is rotatably supported on the governor lever shaft (18). The bearing portion (17a) of the second lever (17) is provided on both sides of the bearing portion (16a) of the first lever (16), and at least one bearing portion (17a) of the second lever (17) is connected to the governor lever. Since it fixed to the axis | shaft (18), it becomes easy to assemble a governor lever, and the fixing structure of a 1st lever can be made a simple structure. Further, the governor lever can be easily positioned on the governor lever shaft.

  Further, the second lever can restrict the rotation of the first lever and the engine speed, thereby reducing the number of parts and reducing the cost. Further, the second lever can have a simple U-shaped structure, and can be easily manufactured by simply bending the plate.

Further , a spring (22) for urging the first lever (16) is provided between the first lever (16) and the second lever (17) on the side where the fuel is increased at the start, and the spring (22) Is a double torsion coil having two coil portions (22a, 22a), and the two coil portions (22a, 22a) are arranged on both sides of the first lever (16), so that the spring is locked. The spring can be arranged compactly between the first lever and the second lever without disturbing the part.

Also, the integrally formed hook (17d) for locking the one end to the second lever (17) of the spring (22), the hook (17d) is tongue-like part of the second lever (17) A portion is formed, the tongue-like portion is bent in a “<” shape in plan view, and the hook (17d) is opened toward the side opposite to the first lever (16). Can be constructed simply by cutting out and bending a part of the second lever, and can be constructed compactly without a protruding portion. Moreover, it can be easily performed only by hooking the spring.

Further , since the hook (17d) that locks one end of the spring (22) is also used as a portion that restricts the rotation of the first lever (16) of the second lever (17), the spring acts. The portion to be operated can be as close to the first lever as possible, and the loss is reduced.
In addition, the spring can be formed integrally with a portion for restricting the locking portion and the first lever, and the number of parts can be reduced and the structure can be made compact.

  Next, embodiments of the invention will be described.

  FIG. 1 is a partial cross-sectional plan view of the governor device.

  2 is a front view, and FIG. 3 is a rear view.

  FIG. 4 is a sectional view of the limiter.

  The configuration of the governor device of the present invention will be described with reference to FIGS.

  In the following description, the direction of arrow A in FIG.

  In the casing 2, the cam shaft 3 of the fuel injection pump protrudes and is supported, and a gear 4 is fixed to the protruding portion of the cam shaft 3.

  Further, a governor shaft 5 is disposed in parallel to the side of the cam shaft 3, and a gear 6 is fixed to the middle portion of the governor shaft 5, and the gear 6 and the gear 4 of the cam shaft 3 are engaged with each other. ing.

  A governor device 10 is disposed on one side of the governor shaft 5.

  The governor device 10 has a plurality of spherical governor weights 11 held by a holding body 12 fixed to the governor shaft 5 and a sliding body 13 slidably supported by the governor shaft 5 on the opposite side. The tip of the sliding body 13 is disposed so as to come into contact with contact portions 16b and 16b of a governor lever 15 described later. Thus, the movement of the governor weight 11 due to the centrifugal force is transmitted to the governor lever 15 via the sliding body 13.

  The governor lever 15 includes a first lever 16 and a second lever 17. The first lever 16 is provided with a bearing portion 16 a in the middle in the longitudinal direction (left and right), and is pivotally supported by the bearing portion 16 a at the lower portion of the governor lever shaft 18. A pair of upper and lower contact portions 16b and 16b project from one end of the first lever 16, that is, the left side (the governor shaft 5) of the bearing portion 16a, and the sliding body 13 is formed at the tip of the corresponding contact portion 16b and 16b. The front end of the is in contact. On the other hand, the other end of the first lever 16, that is, the right end portion of the bearing portion 16a is protruded with an engaging portion 16c formed in a bifurcated shape, and the engaging portion 16c adjusts the supply amount of the fuel injection pump. Is engaged with one end of a control lever 19.

  Thus, by interlockingly connecting the governor device 10 and the fuel injection pump, when the engine speed increases, the rotational force is transmitted to the governor shaft 5 via a gear or the like. Centrifugal force acts on the weight 11 and the governor weight 11 moves outward in the radial direction. The governor weight 11 is pushed to slide the sliding body 13 forward. As the sliding body 13 slides, the abutment portions 16b and 16b of the first lever 16 are pushed and rotated in the clockwise direction in FIG. 1, and are engaged with the engaging portion 16c of the first lever 16. The combined control lever 19 is moved backward to reduce the fuel injection amount of the fuel injection pump.

  Conversely, when the engine speed decreases, the centrifugal force acting on the governor weight 11 decreases, the governor weight 11 moves radially inward, and the sliding body 13 is pushed by the first lever 16 in the backward direction. Slide. At this time, the first lever 16 is rotated counterclockwise in FIG. 1 by a spring 22 to be described later, and the control lever 19 is moved in the forward direction opposite to the above to increase the fuel injection amount of the fuel injection pump. To do. Thus, the rotational speed is controlled so that the engine rotational speed becomes the set rotational speed.

  The second lever 17 is formed by bending a plate, and is bent in a U-shape when viewed from the side, so that the tongue-shaped bearing portions 17a and 17a are vertically parallel on the governor shaft 5 side at a predetermined interval. The bearings 17a and 17a are supported by the governor lever shaft 18 by opening a shaft hole. The upper and lower bearing portions 17a and 17a are arranged on both upper and lower sides so as to sandwich the bearing portion 16a of the first lever 16, and at least one of the bearing portions 17a and 17a is fixed to the governor lever shaft 18. The governor lever 15 is configured to rotate integrally. This fixing structure is not limited to screwing, bonding, or the like. In this embodiment, the shaft hole of the upper bearing portion 17a is circular in accordance with the outer shape of the governor lever shaft 18, and the shaft hole polygon of the lower bearing portion 17a is polygonal. It is configured in a shape or a half-moon shape, the outer shape of the lower end of the governor lever shaft 18 is also shaped to match the shaft hole, and is configured to be screwed and fixed with a nut. Therefore, the governor lever 15 can be easily assembled only by being inserted into the governor lever shaft 18 and fixed with a nut, and the fixing structure of the first lever 16 is simple. Further, the positioning of the governor lever 15 on the governor lever shaft 18 is facilitated.

  The second lever 17 is linked to a rotational speed setting lever 20 through a governor lever shaft 18. The rotation speed setting lever 20 is fixed to the upper portion of the governor lever shaft 18 supported by the casing 2 and protrudes in the radial direction, and the rotation speed of the engine is controlled via a spring 21 attached to the protrusion. It is connected to a regulator handle (not shown) for setting and stopping the engine. Thus, the engine speed can be regulated by the second lever 17.

  Further, the upper part on the opposite side (left side) of the second lever 17 is configured to be bent in a U-shape when viewed from the side, and the portions disposed opposite to the front and rear are the restricting portions 17b and 17c. The restricting portions 17b and 17c are arranged so as to be shifted left and right so that the restricting portion 17c disposed on the front side is located on the right side of the restricting portion 17b on the rear side, and the first lever is disposed between the restricting portions 17b and 17c. 16 is arranged in the left-right direction and inserted, and can be rotated only within the range of the front-rear width of the restricting portions 17b and 17c, and the rotation of the first lever 16 is restricted. Therefore, the engine speed can be regulated by the second lever 17 and the rotation of the first lever 16 can be regulated, thereby reducing the number of parts and reducing the cost.

  In a state where the first lever 16 is inserted between the restricting portions 17b and 17c, a double torsion coil (double torsion spring) is provided between the restricting portion 17b and the first lever 16 in the restricting portions 17b and 17c. A spring 22 is provided. The spring 22 is arranged so that the coil portions 22a and 22a are positioned on both upper and lower sides so as to sandwich the first lever 16, and the spring 22 is compactly arranged between the first lever 16 and the second lever 17. It is possible to do.

  From the coil portions 22a and 22a, a locking portion protrudes in two directions in a substantially tangential direction, and the locking portion is formed as a “U” -shaped linear portion 22b in a side view toward the regulating portion 17b side of the second lever 17. And hooked on a hook 17d formed integrally with the restricting portion 17b. The hook 17d is cut in parallel to a part of the restricting portion 17b to form a tongue-like portion and bent into a “<” shape in plan view so that the rear side (opposite to the first lever 16) is opened. It is configured. Thus, the linear portion 22b at one end of the spring 22 protrudes from the inside of the second lever 17 to the outside and is hooked on the hook 17d. The straight portion 22 c at the other end of the spring 22 is locked to the first lever 16. Thus, the second lever 17 can be inserted from the right side in FIG. 1 with the spring 22 locked to the first lever 16, and the straight portion 22b on one end side can be easily locked to the hook 17d. It becomes possible. Further, the portion on which the spring 22 acts can be brought as close to the first lever 16 as possible, and the loss of spring force can be reduced.

  On the other hand, linear portions 22c and 22c extend from the other side of the coil portions 22a and 22a toward the first lever 16 side. And the front-end | tip part of these linear parts 22c * 22c is each bent upward and downward, and is engaged with the middle part of the 1st lever 16. FIG. Thus, the first lever 16 is urged by the spring 22 in the direction of increasing the fuel supply amount.

  Further, the tip of the pin 27 of the limiter 25 is in contact with the front side (opposite to the first lever 16) of the restricting portion 17c. The limiter 25 is for restricting the rotation of the governor lever 15 according to the rotational speed of the engine, and is attached to the casing 2 so as to be detachable and position adjustable.

  As shown in FIG. 4, the limiter 25 is a body 26 that is screwed into the casing 2, a pin 27 that is slidably accommodated in the body 26, and that can contact the second lever 17, and the pin 27 And a plug 29 that receives one end of the spring 28.

  The body 26 has a large-diameter hole 26a and a small-diameter hole 26b. A pin 27 is slidably received in the large-diameter hole 26a and faces the rear end of the pin 27. The plug 29 is housed and fixed to the plug 29, and one end of the large diameter hole 26a is closed by the plug 29. A width L1 serving as a setting gap is provided between the pin 27 and the plug 29. The other end of the large-diameter hole 26a communicates with the small-diameter hole 26b. The tip 27a of the pin 27 is inserted into the small-diameter hole 26b, and the tip of the pin 27 protrudes from the body 26. Is in contact with the restricting portion 17c. A flange 27b is formed at the center of the pin 27, and the protrusion of the pin 27 is restricted by bringing the flange 27b into contact with a step portion 26c formed between the large diameter hole 26a and the small diameter hole 26b. ing. In the large-diameter hole 26a, a spring 28 is externally fitted on the pin 27 between the flange 27b and the plug 29, and the pin 27 is biased so as to protrude from the body by the biasing force of the spring 28. Yes.

  In the limiter 25, the stroke of the pin 27 is determined by the width L1 provided between the pin 27 and the plug 29. Since the width L1 is a very small value, the conventional operation for determining the stroke has been time-consuming and difficult. Therefore, as shown in FIG. 4, the stroke setting operation of the pin 27 is shortened with a simple structure in which the small diameter hole 26d is opened on the side surface of the body 26 in the vicinity of the flange 27b, in other words, the bottom side surface of the large diameter hole 26a. Easy to do in time.

  That is, when the limiter 25 is assembled, a hard wire such as steel having a diameter L1 is inserted into the body 26 from the small-diameter hole 26d, and the pin 27 and the spring 28 are accommodated in the body 26. Positioned between the portion 27a side surface (left side surface in FIG. 4) and the step portion 26c, with the two wires straddling the tip portion 27a, the plug 29 is driven into the large diameter hole 26a and inserted, Alternatively, when the plug 29 is housed and fixed in the body 26 in a state where the plug 29 cannot be pushed in by being screwed, the pin 27 is pushed by the urging force of the spring 28 and the pin 27 is pushed. A gap having a width L1 having a width equivalent to the diameter of the wire can be obtained between the right end of the plug 29 and the left end of the plug 29. Thus, the stroke of the pin 27 can be set. The small-diameter hole 26d is closed by the inner surface of the limiter mounting hole when the limiter 25 is mounted to the casing 2.

  With this configuration, since the centrifugal force acting on the governor weight 11 is small when the engine is started, the resultant force of the urging force of the spring 22 against the first lever 16 and the urging force of the spring 21 against the second lever 17 Is larger than the pushing force of the sliding body 13 against the contact portions 16b and 16b of the first lever 16, and the first lever 16 is in a counterclockwise rotation in FIG. And the restricting portion 17c of the second lever 17 is in contact with the pin 27 of the limiter 25. That is, the first lever 16 is rotated to the fuel increase side in a state of being in contact with the inner surface of the second lever 17 by the urging force of the spring 22, and the control lever 19 is moved to the increase side of the fuel supply amount. Become. This makes it easier to start the engine.

  Further, when the rotational speed is greatly reduced due to an increase in load or the like while operating at the set rotational speed, first, the weight is moved by the decrease in the rotational speed, and the sliding body 13 is also moved to the first state. The lever 16 rotates to the increase side, and the restricting portion 17c of the second lever 17 is in contact with the limiter 25. At this time, when the load is large and the rotational speed further decreases, the restricting portion 17c pushes the pin 27 of the limiter 25 forward. As a result, the pin 27 slides against the urging force of the spring 28, and the first lever 16 and the second lever 17 rotate forward by the width L1. By the rotation of the first lever 16, the control lever 19 is further moved to the increased amount side by the width L1, and the fuel supply amount becomes larger than usual, so as to increase the rotation speed as long as black smoke or the like is not generated. The stickiness at low rotation, such as during high loads, increases, maintaining the rotation without generating an engine stall and increasing it to the set rotational speed.

  Thus, at the time of starting, the fuel supply amount is set by the rotation of the rotation speed setting lever 20 by the regulator handle, and the rotation of the rotation speed setting lever 20 is set through the spring 21 by the rotation. The first lever 16 is rotated to the increase side via the second lever 17 and the spring 22 connected to the number setting lever 20, and is regulated between the regulating portions 17b and 17c.

  Then, from the state in which the fuel supply amount is increased, the centrifugal force acting on the governor weight 11 increases as the engine speed increases, and when the set speed is reached, the first lever 16 becomes the biasing force of the spring 22. It rotates against the decrease side, and is maintained at a position that balances the pushing force of the sliding body 13 and the biasing force of the spring 21, becomes a set rotation speed, and becomes a normal operation state.

  As described above, by using the governor lever 15 and the limiter 25, when the engine speed is low, such as when the engine is started, the fuel supply amount is increased more than usual so that the engine can be started easily. Along with the increase, the fuel injection amount is decreased by a predetermined amount so that it becomes a normal fuel supply amount, and when the rotational speed decreases due to a load or the like, the fuel supply is increased by the movement of the governor weight and increased to the set rotational speed. When the load is still larger, the limiter pin 27 is slid to further increase the fuel to increase the rotational speed.

The partial cross section top view of a governor apparatus. Similarly front view. Similarly rear view. Sectional drawing of a limiter.

15 Governor lever 16 First lever 16a Bearing portion 17 Second lever 17a Bearing portion 18 Governor lever shaft 20 Speed setting lever 22 Spring

Claims (1)

The governor lever (15) is interlocked with the governor weight (11), the first lever (16) for adjusting the injection amount of the fuel injection pump, and the rotation of the first lever (16) is restricted to a predetermined range, In the governor device constituted by the second lever (17) connected to the rotation speed setting lever (20), the bearing portion (16a) of the first lever (16) is rotatably supported on the governor lever shaft (18). The second lever (17) is provided with bearing portions (17a) on both sides of the bearing portion (16a) of the first lever (16), and at least one bearing portion (17a) of the second lever (17) is provided. A spring (22) fixed to the governor lever shaft (18) and biasing the first lever (16) to the side between the first lever (16) and the second lever (17) to increase the fuel at the start. And the spring (22) A double torsion coil having two coil portions (22a, 22a) is arranged, and the two coil portions (22a, 22a) are arranged on both sides of the first lever (16), and one end of the spring (22) is arranged. A hook (17d) to be locked is formed integrally with the second lever (17), and the hook (17d) forms a tongue-like portion on a part of the second lever (17). The hook (17d) is bent in a "<" shape in plan view, the hook (17d) is opened toward the opposite side of the first lever (16), and one end of the spring (22) is locked. A governor device characterized in that it is also used as a portion for restricting the rotation of the first lever (16) of the second lever (17) .

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