JPS5910347Y2 - Hydraulic pump mounting structure - Google Patents

Description

[Detailed description of the invention] This invention relates to a hydraulic pump mounting structure for tractors, etc., which effectively utilizes the dead space on the side of the engine.
In addition to being compactly equipped with several hydraulic pumps,
This allows the same type of hydraulic pump to be used for multiple hydraulic pumps.

In a tractor-mounted engine, a pump casing is provided protruding from one side, and a fuel injection pump and a fuel camshaft are provided on this pump casing, and a working hydraulic pump is installed behind the pump casing to be driven by the fuel camshaft. I am wearing it.

On the other hand, in the case of tractors that use power steering, the hydraulic pump has traditionally been placed in front of the engine.
The crankshaft is extended forward to drive it.

However, if two hydraulic pumps are installed independently and separately as described above, consideration must be given to each individual mounting structure, which increases costs and wastes space, reducing the overall cost. It was not possible to make it more compact.

The present invention solves these conventional problems, and its features include a pump casing protruding from one side of the engine, and a fuel camshaft that drives the fuel injection pump attached to the pump casing. A balancer case is attached to the back of the pump casing facing the fuel camshaft, and the first and second hydraulic pumps are arranged before and after the balancer case, and the first hydraulic pump is connected to the pump casing. The input shafts of the first and second hydraulic pumps are located below the casing and have the same structure, and each of the manpower shafts is removably connected to a rotating part within the balancer case.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
In the figures 1 to 5, reference numeral 1 denotes a diesel engine mounted on a tractor.A front gear case 3 is attached to a crankcase 2 of the diesel engine, and a pump casing 4 is attached to one side of the front end of the gear case 3. are integrally protruded.

The pump casing 4 has a box-like shape, and a fuel injection pump 5 is mounted from the upper surface thereof, and a fuel camshaft 6 for driving the fuel injection pump 5 is rotatably inserted therein.

The fuel camshaft 6 projects rearward from the pump casing 4, and a gear 7 for extracting power is provided at its projecting end.

Reference numeral 8 denotes a balancer case containing a balancer device 9, which is divided into four parts: a front cover 10, a bearing case 11, a case body 12, and a rear cover 13.
is mounted behind the pump casing 4, and its lower part protrudes below the pump casing 4.

The balancer devices 9 are for damping the vibrations of the engine 1, and are arranged in three sets in the case body 12, one above the other with different phases.The balancer shaft 14 of each balancer device 9 is connected to the bearing case 11 and the case. A ball bearing 15 fitted into the main body 12. 16, and are interlocked and connected to each other via a gear 17 fitted on the rear end.

Reference numeral 18 denotes a drive shaft, the inner peripheral surface of which is a spline cylinder 18a, and ball bearings 19. The drive shaft 18 has a gear 21 that engages a gear 7 at the rear end of the fuel camshaft 6 in the front force bar 10, and a gear 21 at the front end of the intermediate balancer shaft 14. A gear 23 that meshes with 22 is provided, respectively.

24 is a gear located at the bottom of the balancer case 8,
Front case 10 and bearing case 11 via boss portion 25
This gear 24 is rotatably supported by the intermediate shaft 2.
It engages gear 7 through intermediate gear 27 on top of gear 6.

The boss portion 25 has a spline tube 25a on its inner peripheral surface, and has the same shape as the spline tube 18a of the drive shaft 18.

Reference numeral 28 indicates a first hydraulic pump for power steering, and reference numeral 29 indicates a second hydraulic pump for working purposes, which are distributed to the front and rear of the balancer case 8 to utilize the dead space behind and below the pump casing 4. The first hydraulic pump 28 is located below the pump casing 8 and at the lower front of the front cover 10, and the second hydraulic pump 29 is located below the rear cover 1.
3 are removably attached to the upper part of the rear surface of the unit 3 with bolts or the like.

First and second hydraulic pumps 28. 29 are the same, and the input shafts 30. 31 are both the same spline shaft, and each input shaft 30. 31 is removably spline-fitted to the boss portion 25 of the gear 24 and the drive shaft 18.

Of course, in this case the first and second hydraulic pumps 28. 29
are arranged within the protruding range of the balancer case 8.

32. 33 is a hydraulic pump 28. 29 piping.

Note that since the hydraulic pumps 28 and 29 have the same capacity, the gear ratio of the gear system on the first hydraulic pump 28 side and the second hydraulic pump 29 side is changed to obtain the required amount of discharge from each hydraulic pump 28 and 29. I'm trying to get the quantity.

As detailed in the above embodiment, in the present invention, a balancer case is attached to the back of the pump casing that protrudes from one side of the engine, and the first and second hydraulic pumps are attached to this balancer case in a manner that they are divided into the front and rear. Because of this, the power for the balancer can be used as a power source, and piping etc. are easy.
Manufacturing costs can be reduced.

Furthermore, since the balancer case is used as a support, vibrations to the hydraulic pump can be reduced by the vibration damping effect of the balancer device, and the durability of the hydraulic pump is also improved.

It is located at the rear or below the balancer case and hydraulic pump casing, and the space on the side of the engine can be used effectively, making it possible to significantly downsize the entire structure.

Furthermore, since the input shafts of each hydraulic pump have the same structure,
The same hydraulic pump can be used for both, making it easy to process, assemble and disassemble each part, and it is also very easy to reduce manufacturing costs through mass production.

[Brief explanation of drawings]

The drawings illustrate one embodiment of the present invention, and FIG. 1 is a schematic plan view, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is a view taken along the line III-III in FIG. 1. Fig. 4 is a view taken along the I■-■V line in Fig. 2, and Fig. 5 is a view taken along the line V-V in Fig. 3.
It is a line arrow view. DESCRIPTION OF SYMBOLS 1... Diesel engine, 4... Pump casing, 6... Fuel camshaft, 8... Balancer case, 9
...Balancer device, 14...Balancer shaft, 18...
・Drive shaft, 18a, 25a...Spline tube, 28・
...First hydraulic pump, 29...Second hydraulic pump, 30
．． 31...Input shaft.

Claims (1)

[Scope of utility model registration request] In an engine in which a pump casing is protruded from one side of the engine and a fuel camshaft for driving a fuel injection pump is provided on the pump casing, a balancer case is attached behind the pump casing facing the fuel camshaft, and this The first and second hydraulic pumps are arranged before and after the balancer case, the first hydraulic pump is located below the pump casing, and the input shafts of the first and second hydraulic pumps are of the same structure, so that each human power A hydraulic pump mounting structure characterized by a shaft that is removably connected to a rotating part within a balancer case.