JPH061745U - Governor stop operation reduction device for diesel engine - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent governor stop operation force of diesel engine with a simple structure to prevent hunting of engine rotation. [Constitution] The governor lever 1 has a linear receiving guide surface 4
0 on the lower end portion 41 of the rack operation tool 3 in a linear sliding surface 4
3 are formed respectively, and the sliding surface 43 of the rack operating tool 3 is placed on the receiving guide surface 40 of the governor lever 1 in a surface contact manner so that the rack operating tool 3 can slide along the receiving guide surface 40. Constitute. Long and wide receiving guide surface 40
Thus, the rack operating tool 3 can be received and slid to reduce the wear of the contact surface, the rattling of the rack operating tool 3 can be eliminated, and the hunting of the rotation of the engine E can be smoothly prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for reducing the operation force for stopping a governor of a diesel engine, which can prevent engine hunting with a simple structure.

[0002]

[Prior art]

 In a diesel engine, a rack operation tool is slidably attached to the governor lever, and only this rack operation tool is engaged with the injection rack of the fuel injection pump, and the governor lever is not engaged with the injection rack. When stopping the diesel engine by pushing back to the non-injection position with the engine stop operation tool, the rack operation tool can be operated easily against the spring force of the weak return spring, and it must be pushed back against the strong spring force of the governor spring. Disappear.

The present invention is directed to a governor of this type of diesel engine, and its basic structure is as shown in FIG. 1, FIG. 3 or FIG. 5, in which a governor lever 1 is swingably supported by a diesel engine E and a governor lever is 1. The support pin 11 is projected from the output part 2 of FIG. 1, the elongated hole 10 is opened in the plate-shaped rack operating tool 3, and the supporting pin 11 is inserted into the elongated hole 10 to attach the rack operating tool 3 to the governor lever 1 and the fuel injection pump 4 Of the injection rack 5 is slidably supported along the operation direction A, the rack operation tool 3 is engaged with the injection rack 5, the rack operation tool 3 is urged by the return spring 6 toward the fuel increase side, and the governor is moved. The unbalanced force between the force GF and the spring force of the governor spring 7 is configured to be transmitted from the governor lever 1 to the injection rack 5 via the rack operation tool 3 and the engine stop operation tool 28. Facing the rack operation tool 3 or the injection rack 5.

As the conventional technique 1 of this type, as shown in FIG. 5, two support pins 11 and 11 are fixed to the governor lever 1 while being fitted in the elongated holes 10, and the rack operation tool 3 is fixed to the governor lever 1. There is also a structure in which the upper end surface of the elongated hole 10 is received by two support pins 11 so as to be slidable and slidable.

Further, there is a conventional technique 2 in which a rack-shaped guide body is used to guide the rack operation tool, which is different from the combination of the long hole and the support pin. As shown in FIG. 3 and FIG. 4, the governor lever 1 is provided with a box-shaped slide guide frame 60 having a U-shaped cross section, and the slide guide frame 60 has a plate-like rack operation tool in the through passage 61. There is a configuration in which 3 can be inserted.

[0006]

[Problems to be solved by the device]

 In the prior art 1, the rack operation tool 3 slides while the upper end surface of the elongated hole 10 makes point contact with the support pin 11. Therefore, if the elongated hole 10 wears due to long-term use, the rack operation tool 3 during sliding. There is a risk of rattling and hunting the rotation of the engine E. Further, in the prior art 2, since the slide operation tool 3 slides while being oriented by the box-shaped slide guide frame 60, rattling of the operation tool 3 is prevented, but the slide guide frame 60 is attached. This complicates the structure. The present invention has a technical problem of preventing hunting of engine rotation with a simple structure.

[0007]

[Means for Solving the Problems]

 Means for achieving the above object will be described below with reference to the drawings illustrating an embodiment. That is, according to the present invention, in the governor of the diesel engine of the basic structure, the linear receiving guide surface 40 is formed on the output portion 2 of the governor lever 1, and the linear sliding surface is formed on the lower end portion 41 of the rack operating tool 3. 43 is formed, and the sliding surface 43 of the rack operating tool 3 is placed on the receiving guide surface 40 of the governor lever 1 in a surface contact manner so that the rack operating tool 3 can slide along the receiving guide surface 40. This is a diesel engine governor stop operation force reduction device characterized by being configured. The rack operating tool 3 is biased toward the fuel increase side by a return spring 6, and the return spring 6 may be a start spring, for example, or a dedicated spring may be used.

[0008]

[Action]

 Since the rack operating tool 3 is configured to be capable of receiving and sliding with the linear wide receiving guide surface 40, the receiving guide surface 40 is long and has a large area, so that the rack operating tool 3 is less worn even after long-term use and the rack operating tool 3 is provided. Comes into surface contact with the receiving guide surface 40 of the governor lever 1 from above and slides smoothly. Therefore, unlike the prior art 1, the rack operation tool 3 does not rattle when sliding due to the point contact of only the support pin 11. Further, since only the receiving guide surface 40 is formed on the governor lever 1, it is not necessary to attach a complicated guide frame to the governor lever 1 unlike the prior art 2.

[0009]

[Effect of device]

 (1) Long and wide area The receiving guide surface receives and slides the rack operation tool in surface contact form, and wear on the contact surface can be reduced, so rattling of the rack operation tool is eliminated and the engine Rotational hunting can be prevented smoothly over a long period of time. (2) It is not necessary to attach a complicated guide frame to the governor lever, and only a linear receiving guide surface is formed on the governor lever to receive the rack operation tool in a surface contact state, so that the structure is simple and inexpensive to implement.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is an exploded perspective view of a governor lever of a vertical diesel engine, and Fig. 2 is a schematic vertical sectional view around the pump chamber of the diesel engine. As shown in FIGS. 1 and 2, a gear chamber 12 is provided in the front part of the vertical diesel engine E, and a pump chamber 14 is exposed to the rear of the gear chamber 12 via a partition wall 13 so as to communicate with each other. The fuel injection pump 4 is housed in the pump chamber 14 from above, the fuel injection cam shaft 15 is supported in the lower direction in the front-rear direction, and the fuel injection cam shaft 15 is interlocked with the crank shaft via the fuel cam gear 16. The fuel injection pump 4 is linked to the fuel injection cam shaft 15 so that the fuel injection can be driven. The governor lever 1 is swingably supported on the partition wall 13 via a fulcrum 19, a governor weight 17 is attached to the fuel cam gear 16, and the governor weight 17 is interlocked with an input pin 21 of the governor lever 1 via a governor sleeve 18. , The output part 2 of the governor lever 1 is interlocked with the rack pin 5a of the injection rack 5 of the fuel injection pump 4 via the rack operation tool 3, and the action part 22 of the governor lever 1 is transferred to the speed control lever 20 via the governor spring 7. Work together. As a result, the fuel injection pump 4 is adjusted to an appropriate injection position by the unbalanced force between the spring force of the governor spring 7 and the governor force GF of the governor weight 17, and the actual rotational speed of the engine E can be adjusted to the set rotational speed. Suru

As shown in FIG. 1, the governor lever 1 is composed of two fork levers 1 a and 1 b, the fork lever 1 b on the back side receives a spring force by suspension of a governor spring 7, and the fork lever 1 a on the front side receives the governor. The input pin 21 receives the governor force by the weight 17, and the pressing force and the receiving pin 24 allow the spring force to be transmitted from the fork lever 1b to the fork lever 1a. Further, the plate-shaped rack operating tool 3 is slidably supported on the output part 2 of the fork lever 1a along the operation direction A of the injection rack 5, and the fork part 25 of the rack operating tool 3 is engaged with the injection rack 5. In contrast, the fork lever 1a is not engaged with the injection rack 5 and is exposed only from the fuel reduction side so that the acting force of the governor lever 1 can be transmitted to the injection rack 5 via the rack operation tool 3. The rack operating tool 3 is biased toward the fuel increase side by a start spring 6, and the injection rack 5 can be moved to the starting position by the action of the spring 6 at the time of starting. However, a dedicated return spring for urging the rack operation tool 3 toward the fuel increase side may be provided separately from the start spring.

The rack operation tool 3 is provided with an elongated hole 10 along the sliding direction A, and two support pins 11 are fitted into the elongated hole 10 and fixed to the fork lever 1 a. The support pin 11 is received by the upper end surface of the rack 10 so that the rack operation tool 3 can be slidably attached to the governor lever 1 without being detached. That is, as shown in FIG. 1, a linear receiving guide surface 40 is formed on the output portion 2 of the governor lever 1, and a linear sliding surface 43 is formed on the lower end portion 41 of the rack operating tool 3. The sliding surface 43 of the rack manipulator 3 is placed on the receiving guide surface 40 of the governor lever 1 in a surface contact manner so that the rack operating tool 3 can slide along the receiving guide surface 40. The front end surface of the rack operation tool 3 on the engagement side of the start spring 6 is curved to form a stop operation receiving surface 31, and the receiving surface 31 is pushed back to the fuel reduction side by the engine stop lever 28, and the injection rack 5 is moved. The diesel engine E can be stopped by moving it to the non-injection position. When the tip surface of the rack operating tool 3 is curved as the receiving surface 31, the corner edge does not stand on the plate-like rack operating tool 3, so that the rack operating tool 3 does not get caught in the lower receiving guide surface 40. Sliding becomes smooth, and the strength of the operation tool 3 on the stop operation side also increases. Further, the rack operation tool 3 is pressed against the governor lever 1 via a leaf spring-shaped elastic spring 8 folded in half.

Therefore, the function of the governor of this diesel engine will be described. Since the rack operation tool 3 can be received and slid by the linear and long receiving guide surface 40, the surface area is increased by the surface contact with the rack operation tool 3 and the receiving guide surface 40 is used for a long time. Also reduces wear. Therefore, unlike the prior art 1 described above, the rack operation tool 3 does not rattle when sliding by the point contact of only the support pin 11, and the hunting of the rotation of the engine E can be smoothly prevented for a long period of time. . Further, unlike the prior art 2, it is not necessary to attach a complicated guide frame to the governor lever 1, and only the linear receiving guide surface 40 is formed on the governor lever 1, so that the structure is simple.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a governor lever of a vertical diesel engine.

FIG. 2 is a schematic vertical sectional view around a pump chamber of the diesel engine.

FIG. 3 is a perspective view of a main part of a governor lever showing a related art 2.

FIG. 4 is a schematic vertical sectional view of a governor lever showing the prior art 2.

5 is a view equivalent to FIG. 2 showing the prior art 1. FIG.

[Explanation of symbols]

 1 Governor lever 21 Output part of 3 3 Rack operating tool 4 Fuel injection pump 5 Injection rack 6 Return spring 7 Governor spring 8 Repulsion spring 10 3 long hole 11 Support pin 28 Engine stop operating tool 40 1 receiving guide surface 41 3 under End surface 43 30 Sliding surface A 3 sliding direction E Diesel engine

Claims (1)

[Scope of utility model registration request] 1. A governor lever for a diesel engine (E)
(1) is swingably supported, and the output part of the governor lever (1)
Support pin (11) is projected to (2), and a plate-shaped rack operation tool
Make a long hole (10) in (3) and support pin in the long hole (10).
Insert the (11) into the governor lever (1) and attach the rack operation tool (3).
The fuel injection pump (4) injection rack (5) operating direction (A)
The rack operation tool (3) is slidably supported along the pipe, the rack operation tool (3) is engaged with the injection rack (5), and the rack operation tool (3) is returned to the spring (6).
So that the unbalanced force between the governor force GF and the spring force of the governor spring (7) can be transmitted from the governor lever (1) to the injection rack (5) via the rack operation tool (3). In the governor of a diesel engine in which the engine stop operation tool (28) is made to face either the rack operation tool (3) or the injection rack (5), the output part (2) of the governor lever (1) is linearly arranged. Forming a receiving guide surface (40) in the shape of a straight line, forming a linear sliding surface (43) at the lower end (41) of the rack operating tool (3), and sliding surface (43) of the rack operating tool (3). ) Is the guide surface (40) for receiving the governor lever (1)
A governor stopping operation force reducing device for a diesel engine, characterized by being mounted on the top in a surface contact manner and configured to be able to receive the rack operation tool (3) and slide along the guide surface (40).