JPH0629563B2 - Multi-power unit - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a multi-power unit in which a hydraulic pump for a hydraulic power source and a generator for a power source are configured as one unit together with an engine as a power source.

2. Description of the Related Art In recent years, at various work sites, there is an increasing demand for a multi-power unit having both a function as a power source for obtaining welding power and the like and a function as a hydraulic pressure source.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in this type of multi-power unit, in addition to working machines such as a hydraulic pump for generating hydraulic pressure and a generator for generating electric power, hydraulic oil for supplying hydraulic oil to the hydraulic pump is used. Ancillary equipment, such as tanks and fuel tanks, that require a large occupied volume are integrated together, and the number of parts increases and the size increases, and the noise of the engine used as a power source is reduced. If the entire device is covered with a soundproof structure so as not to leak to the outside, the size of the device will be further increased, and it has been demanded to be compact. Moreover, with this type of multi-power unit,
In order to prevent secondary noise caused by engine vibration, the engine is often supported by vibration isolation. Therefore, if a working machine such as a hydraulic pump or a generator driven by the engine is installed separately from the engine, Not only is the transmission system complicated, but the axial center must be adjusted during assembly, which makes maintenance difficult.

In view of such problems, the present invention compactly accommodates various working machines such as a hydraulic pump and a generator in a limited space around the engine, and obtains a mounting structure suitable for a vibration-proof support structure. It was made for that purpose.

Means for Solving the Problems In order to achieve the above object, in the present invention, a gear in which a gear transmission mechanism with the crankshaft (5) is mounted on one end side of the engine body (4) in the crankshaft (5) direction. The box (7) is attached, and the gear box (7) is provided with an overhanging portion (6) projecting to the side of the engine body (4), and the engine body (on the rear surface of the overhanging portion (6) ( 4) The hydraulic pump (17) arranged laterally is fixed, and the shaft (18) parallel to the crankshaft (5) of the hydraulic pump (17) is connected to the output shaft (10) of the gearbox (7). )
Directly to the gear box (7), and further supports the generator (24) on the overhanging portion (6) of the gear box (7) via the mount (19), and the generator is provided on the front side of the gear box (7). A belt transmission mechanism (27) is interposed between the (24) and the output shaft (10) protruding from the gear box (7).

In the above description, the rear surface of the overhanging portion (6) means the engine body (4) in the crankshaft (5) direction of the overhanging portion (6).
The front surface of the overhanging portion (6) is the surface on the opposite side, that is, the surface opposite to the engine body (4) in the direction of the crankshaft (5).

Action Since the hydraulic pump (17) and the generator (24) and the engine body (4) are integrally connected via the gear box (7), a vibration-proof support structure can be easily provided. , It is not necessary to align the axis when assembling. Moreover, the gear box (7) is provided with an overhanging portion (6) protruding laterally of the engine body (4), and the hydraulic pump (17) is fixed to the overhanging portion (6). Due to
The relatively long hydraulic pumps (17) can be juxtaposed along the longitudinal direction of the engine body (4).

EXAMPLES Hereinafter, the present invention will be described based on examples. In FIG. 1, (1) shows an outer plate case of the multi-power unit (2) according to the present invention, and inside the outer plate case (1), as shown in FIG. Between the front wall (1a) and the rear wall (1b), the engine (3) is installed at a position biased toward one rear wall (1b). In addition, in this specification, FIG. 2 and FIG.
In the drawing, the left side is described as the front and the right side is described as the rear. The longitudinal direction of the engine (3) along the axial direction of the crankshaft (5) horizontally arranged on the engine body (4) is parallel to the front and rear walls (1a) (1b). It is installed in. Then, as shown in FIGS. 1 and 3, the front wall (1a) of the engine body (4) is provided at one end side in the longitudinal direction of the engine body (4).
A gear box (7) having an overhanging portion (6) protruding laterally is attached. Then, the engine body (4) and the gear box (7), which are integrally connected in this way, as shown in FIG. 3 and FIG. 4, are provided with anti-vibration rubbers (8) and (8). It is supported.

Next, in the gear box (7), an intermediate shaft (9) and a final output shaft (10) arranged in parallel with the crankshaft (5) are provided as shown in FIG. The gearbox (7) is provided so as to be inclined slightly downward, and in the gear housing space (11) of the gearbox (7), the input gear (12) and the intermediate shaft (9) provided on the crankshaft (5) are provided. ) Is meshed with the intermediate gear (13), and the output gear (14) similarly provided with the final output shaft (10) is meshed with the intermediate gear (13). In this way, the gear transmission mechanism (15) oriented perpendicular to the axial direction of the crankshaft (5) is constructed.

A small hydraulic pump (16) having a relatively small capacity is fixed to the front wall (7a) located on the side opposite to the engine of the gear box (7), and the small hydraulic pump (16) is attached to the front wall. It is driven by the above-mentioned intermediate shaft (9) which penetrates (7a) and projects forward.

Further, the final output shaft (both ends of 10) penetrates the front wall (7a) and the rear wall (7b) of the gear box (7) in the overhanging portion (6) and projects in the front-rear direction. ing.

Then, on the front side of the engine body (4), a vertically long small-capacity large-sized hydraulic pump (17) is arranged in the longitudinal direction along the crankshaft (5) of the engine body (4). In order to drive the large hydraulic pump (17) as well, one end side of the large hydraulic pump (17) is flanged to the rear wall (7b) of the overhanging portion (6) and is also arranged in parallel. The pump drive shaft (18) of the above is serration-coupled to the rear projecting end (10a) of the final output shaft (10) which projects rearward through the projecting portion (6), that is, projects toward the engine. In this way, by providing the gear box (7) with the overhanging portion (6) projecting laterally of the engine body (4), a relatively vertically long large hydraulic pump (17) is attached to the engine body (4). Even when juxtaposed together,
By fixing one end side of the large hydraulic pump (17) to the overhanging part (6), not only can it be stored compactly around the engine, but also the hydraulic pump drive to the final output shaft (10). Since the shaft (18) is directly connected,
There is an advantage that the axial center alignment is not required when mounting the large hydraulic pump (17).

On the other hand, as shown in FIGS. 3 and 4, a generator mount (19) is provided at the tip of the overhanging portion (6). This generator mounting base (19) is mounted on the tip wall (6a) of the overhanging portion (6) and a mounting plate (20) mounted on the mounting plate (20) at a front-rear interval. The upper and lower support plates (21) (21), the horizontal bottom plate (22) provided on the lower side of the support plates (21) (21), and the support plates (21) (21). It is composed of the same horizontal generator installation plate (23) provided on the upper side.
Further, one side of the generator installation plate (23) is supported by the upper wall (7c) of the gear box (7). An AC generator (24) is placed on the generator installation plate (23).

This generator (24) is provided with a generator drive shaft (26) projecting forward from the generator body (25) having a substantially cylindrical shape, and at the tip of the generator drive shaft (26). The driven pulley (28) forming the belt transmission mechanism (27) is attached to the. On the other hand, at the front projecting end (10b) of the final output shaft (10) projecting forward from the projecting portion (6), a drive pulley (29) that also constitutes a belt transmission mechanism (27).
Is provided. An endless belt (30) for power transmission is wound around the drive pulley (29) and the driven pulley (28). Incidentally, (31) indicates a tension pulley for adjusting the tension of the endless belt (30). That is, the engine power taken out from the final output shaft (10) is transmitted to the generator drive shaft (26) through the path of the drive pulley (29) → the endless belt (30) → the driven pulley (28), Will generate electricity.

In this embodiment, as shown in FIG. 4, a rectifier (3) for converting the generated alternating current into a direct current is provided on the generator drive shaft (26) protruding forward from the generator main body (25).
2) is fitted. Also, the generator mount (19)
The relatively large openings (33) (33) are respectively provided on the two front and rear support plates (21) (21) provided in the A rectifying reactor (34) arranged in the direction is installed on the bottom plate (22).

In this embodiment, the outer case (1) is partitioned into a plurality of spaces by front and rear partition walls (35) (36) provided therein, and the front and rear partition walls ( 3
5) The engine (3) and the like are arranged in a central engine room (37) sandwiched by (36). Also,
On the rear side of the rear partition wall (36), as shown in FIG. 2, one side of the partition wall (38) arranged in the front-rear direction is divided by the intermediate partition walls (39) (39). The four formed exhaust ducts (40) (40) are provided, and an oil cooler (41) is provided on the other side of the partition wall (38) as shown in FIG. A hydraulic oil tank (42) is installed. On the other hand, the front partition wall (35) is
One end thereof is arranged in the up-down direction and connected to the ceiling wall (1c) of the outer plate case (1), whereby the intake port (43) provided in the front wall (1d) of the outer plate case (1). )
Partitioning the intake duct (44) facing the engine room (37). Further, the other end side of the front partition wall (35) is arranged in a downwardly inclined manner toward the front and then vertically downward so as to traverse the body portion of the generator body (25). Near the boundary between the generator body (25) and the generator installation plate (23) of the generator mount (19),
It is bent at a substantially right angle to the front and connected to the front wall (1d) of the outer plate case (1). In addition, this front partition wall (3
5), as shown in Fig. 3, the generator body (2
A horseshoe-shaped opening (45) is provided so as to surround 5).

That is, inside the outer plate case (1), a cooling fan (46) driven by the crankshaft (5) is driven.
Thus, the air in the engine room (37) in which the engine (3) is installed passes through the fan case (48) attached to the rear partition wall (36) to the exhaust ducts (40) (40).
There is an airflow that is discharged to. Therefore, the air introduced from the intake port (43) passes between the flow straightening plates (49) (49) provided in the intake duct (44) as shown by the streamline of the arrow in FIG. It is guided to the front of the rectifier (32), and a part of it is guided to the rectifier (32) and the generator body (2
After passing through the side of 5) and cooling the rectifier (32) and the generator body (25) in between, it is introduced into the engine compartment (37) through the opening (45), and the rest is downward. Guided by the support plates (21) (2) of the generator mount (19).
After passing through the openings (33) (33) provided in (1) and cooling the reactor (34) in the meantime, it is similarly introduced into the engine compartment (37). By cooling the rectifier (32) and the reactor (34), which easily generate heat, with the cold air taken in from the intake port (43) in this way, the cooling efficiency is increased, There is an advantage that overheat of the rectifier (32) and the reactor (34) can be prevented. As for the reactor (34), which tends to reach a high temperature, most of the parts are stored and arranged in the space formed by the generator mount (19), so that careless touching may cause electric shock, The risk of burns is largely avoided.

In addition, in FIG. 1, (50) shows a control panel, and (51) shows an external output panel provided with a hydraulic hose connection port, a power output terminal and the like. That is, by adjusting the control panel (50), the hydraulic pressure amount and the electric power output from the external output panel (51) are set to appropriate values. Reference numerals (52) and (52) denote batteries arranged below the generator mount (19), and the generators (52) (52) attached to the engine body (4) are attached by the batteries (52) (52). The DC power generated by 56) is stored and used as a starting and auxiliary power source. On the other hand, (53) indicates an exhaust silencer arranged above the engine body (4), and an exhaust pipe (54) extending rearward from the exhaust silencer (53) includes the rear partition. It penetrates the wall (36) and projects to the exhaust duct (40). Further, (55) indicates a fuel tank.

As described above, according to the present invention, the gearbox is attached to the one end side of the engine body, and the working machine such as the hydraulic pump and the generator is attached to the gearbox, so that the engine is driven. Various work machines will be integrated with the engine body via the gear box, and if a vibration-proof support structure is used, it is sufficient to support them as a whole, and as a result, only the engine body is vibration-supported. Compared with the case where it is carried out, the power transmission system becomes direct, and it is not necessary to perform complicated axial centering at the time of assembly, and not only the mounting structure is simplified, but also maintainability is improved. Moreover, since the gear box is provided with the projecting portion projecting to the side of the engine main body, the relatively long hydraulic pump of the working machines of the above machines can be juxtaposed to the side of the engine main body. Even if the entire device is covered with an outer case, the space around the engine can be effectively used to make it compact, and the advantage of being able to downsize this type of multi-power unit is provided. is there.

Further, according to the present invention, the hydraulic pump is attached to the rear surface of the overhanging portion, and the shaft of the hydraulic pump is directly connected to the output shaft of the gear box. Therefore, the number of parts is greater than that when the hydraulic pump is driven by a belt. In addition, since the belt transmission mechanism is not exposed to the outside, the area around the engine body can be made compact.

Also, when connecting this hydraulic pump directly to the output shaft of the gearbox, for example, if the hydraulic pump is attached to the engine body, if the output shaft is far from the side surface of the engine body, the output shaft will be aligned with the engine body. It may be necessary to install a mounting base and attach a hydraulic pump,
In the present invention, the hydraulic pump may be mounted at a position where it can be directly connected to the output shaft, and such a mounting base is unnecessary. In addition, the generator is attached to the overhanging part via a mounting base, but if this generator is attached to the engine body, the mounting base is greatly extended from the engine body to avoid interference with the hydraulic pump etc. It will be mounted to the engine body in that state, and for that purpose it is necessary to select an empty space behind the gear box and fix the mounting base, and it is difficult to adopt a large and strong mounting base. While there is a drawback that the mounting strength of the generator is weak, in the present invention, since this gear box also serves as a part of the mounting base, there is no such inconvenience. Furthermore, since the belt transmission mechanism of the generator is arranged on the front side of the overhanging portion which is the side opposite to the hydraulic pump, there is no interference between the belt transmission mechanism and the hydraulic pump, and the crankshaft direction Has the advantage that the length can be shortened.

[Brief description of drawings]

FIG. 1 is an overall perspective view in which a part of an outer plate case of a multi-power unit according to the present invention is cut away, and FIG. 2 is a cross-sectional plan view showing an arrangement structure of main parts of the multi-power unit, FIG. Is a left side view of the multi-power unit, which is also shown by cutting out the lower side of the outer case,
The figure is also a sectional view taken along the line AA of FIG. (4) …… Engine body, (5) …… Crankshaft, (6) …… Gearbox overhang, (7) …… Gearbox, (10) …… Final output shaft, (17) …… Large hydraulic pump, (18) …… hydraulic pump drive shaft, (19) …… mounting stand, (24) …… generator, (27) …… belt transmission mechanism.

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-61-143297 (JP, A) JP-A-60-53607 (JP, A) JP-A-58-32925 (JP, A) Actual development Sho-61- 132451 (JP, U)

Claims (1)

[Claims] 1. A gear box (7) having a gear transmission mechanism for the crank shaft (5) mounted on one end of the engine body (4) in the direction of the crank shaft (5), the gear box (7) being mounted on the gear box (7). Is provided with an overhanging portion (6) projecting laterally of the engine body (4), and a hydraulic pump (17) arranged laterally of the engine body (5) is fixed to the rear surface of the overhanging portion (6). At the same time, the shaft (18) of the hydraulic pump (17) in the direction parallel to the crank shaft (5) is directly connected to the output shaft (10) of the gear box (7), and the gear box (7) is further extended. The output that protrudes from the generator (24) and the gear box (7) on the front side of the gear box (7) that supports the generator (24) through the mount (19) on the part (6). A belt transmission mechanism (27) is interposed between the shaft (10) and the shaft (10). Multi-power unit.