JPH0238036Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is directed to the mounting structure of an oil pump for cargo handling, especially an oil pump that is rotatably driven by being directly connected to an engine crank pulley via a universal joint. Regarding the mounting structure.

PRIOR TECHNOLOGY In general, cargo handling vehicles such as forklift trucks are equipped with a hydraulic system to carry out cargo handling operations by lifting, tailing, etc., and in this hydraulic system, the oil pump is usually attached to the crank pulley of the engine. It is provided so that it can be directly connected and rotated.

FIG. 3 is a drawing showing the specific structure, in which a crank pulley 2 is attached to one end of the crankshaft 1 that is horizontally mounted on the engine E, and between the crank pulley 2, the water pump pulley, and the charging generator pulley. The fan belt 3 is stretched across. An oil pump P is provided facing the crank pulley 2, and a rotating shaft 6 and the crank pulley 2 are mounted horizontally on the oil pump P.
They are connected by a universal joint 17. More specifically, one end of the universal joint 17 on the engine E side is connected to the crank pulley 2.
It is connected by tightening a bolt 19 to the center of the oil pump P, and one end on the oil pump P side is detachably connected via spline fitting.

Problems to be Solved by the Invention However, in the structure in which the crank pulley 2 and the rotating shaft 6 of the oil pump P are connected by the universal joint 17 as described above, the crank pulley 2 is suspended. When replacing or removing the fan belt 3, tighten the bolt 19 each time.
The problem is that the universal joint 17 must be loosened and the universal joint 17 must be removed, making the attachment and detachment work troublesome.

The present invention is an attempt to improve the above-mentioned problems, and its specific means and effects are as follows.

Measures to solve the problem: A spline tube is provided at one end of the universal joint on the oil pump side that connects the engine crank pulley and the rotation shaft installed horizontally on the oil pump, and the rotation shaft is connected to the spline tube. The spline is fitted so that it can move forward and backward.

A bracket formed in an inverted L shape with a rising part and a horizontal part is extended from the oil pump, while a vertical part corresponding to the above mentioned rising part and a horizontal part are provided on the side of the frame that suspends the oil pump. A horizontal portion is provided corresponding to the horizontal portion, and a long hole is opened in the horizontal portion extending in the front-rear direction.

A bolt is inserted into the elongated hole, and the threaded part cut into the tip of the bolt is screwed into the horizontal part of the bracket so that it can move forward and backward, and the tip part is inserted into the vertical part of the frame into the rising part of the bracket. The adjustment bolts to be connected are screwed together so that they can be adjusted forward and backward.

Operation: Insert the bolt into the elongated hole in the horizontal part of the frame, loosen the bolt screwed into the horizontal part on the bracket side, and rotate the adjustment bolt screwed into the vertical part in the direction of entry. The pump can move in the backward direction and the rotating shaft can be separated from the splined cylinder. By separating the rotating shaft from the spline cylinder portion in this manner, a space for passing the fan belt can be formed between the rotating shaft and one end of the universal joint.

Embodiments Specific embodiments of the present invention will be described below with reference to illustrative drawings.

Reference numeral E is an engine installed in an engine room by being fixed to a frame, and a crankshaft 1 is horizontally mounted on the engine E, extending in the front-rear direction.
A crank pulley 2 is attached to one end of the crankshaft 1. A fan belt 3 is stretched over the crank pulley 2 between a water pump pulley (not shown) and a charging generator pulley (not shown). P is an oil pump which is also installed in the engine room by being attached to the frame 5 via a bracket 4, and one end of the rotating shaft 6 mounted on the pump P is one end of the crankshaft 1. It is provided facing the crank pulley 2 so as to face the crank pulley 2, and is provided so as to be freely adjustable in forward and backward movement with respect to the crank pulley 2. More specifically, the bracket 4 attached to the oil pump P side has a rising portion 4A extending vertically from the tip of the oil pump P, and a rising portion 4A extending rearward from the tip of the rising portion 4A. It is formed into an inverted L-shape with a horizontal portion 4B, and a through hole 7 for an adjustment bolt 12, which will be described later, is provided in the rising portion 4A.
However, tightening holes 8, 8 for suspending bolts 10, 10, which will also be described later, are opened in the horizontal portion 4B. Further, the frame 5 is provided with a vertical portion 5A and a horizontal portion 5B in correspondence with the bracket 4, and the horizontal portion 5B has a long hole 9 extending in the front-rear direction in correspondence with the tightening holes 8, 8. It will be opened. And the same long hole 9
The above-mentioned suspension bolts 10, 10 are inserted into the holes 8, 10, and the threaded portions 10a carved at the tips thereof are inserted into the tightening holes 8, 10.
8 is screwed together.

More specifically, by tightening the bolts 10, 10, the bracket 4 can be fixed to the frame 5 in a hanging manner.
By loosening 10, the bracket 4 is inserted into the elongated hole 9.
It is installed so that it can be moved forward and backward along the

A screw hole 11 is opened in the vertical portion 5A in correspondence with the through hole 7, and the aforementioned adjustment bolt 12 is screwed into the screw hole 11 so as to be freely retractable. More specifically, the screw hole 11 is formed to have a larger diameter than the through hole 7. The adjustment bolt 12 is formed by having a stepped portion in the middle, a large diameter threaded portion 12a on the base side, and a small diameter threaded portion 12b on the tip side. The large-diameter screw portion 12a is screwed into the screw hole 11, while the small-diameter screw portion 12b is inserted into the through hole 7 via the sleeve 13, and the small-diameter screw portion 12b has a washer between it and the rising portion 4A. A bolt 15 is screwed together with a bolt 14 interposed therebetween. Furthermore, a spacer 16 is interposed between the vertical portion 5A and the rising portion 4A by inserting the small diameter screw portion 12b, and the spacer 16 has its inner edge abutting the stepped portion and its outer edge touching the bracket 4 (throughout). Hole 7
(outer circumferential part) of the base plate.

Furthermore, the oil pump P and the crank pulley 2 are connected by a universal joint 17. More specifically, at one end on the engine E side, a flange 18 is connected to the universal joint 17 via a universal joint 17A, and the center line of the flange 18 is aligned with the center of the crank pulley 2. At the same time, with the flange 18 in contact with the center of the crank pulley 2, the bolt 1 is
9 by tightening. Further, at one end on the oil pump P side, a spline cylinder part 20 is connected to the universal joint 17 via a universal joint part 17B, and a spline internal tooth part 20a is carved into the spline cylinder part 20. On the other hand, the rotating shaft 6 has a spline external tooth section 6.
A is carved, and the spline external tooth portion 6a is connected to the spline internal tooth portion 20a by fitting it into the spline internal tooth portion 20a so as to be freely retractable.

Next, the operation thereof, that is, the replacement work of the fan belt 3 stretched around the crank pulley 2 will be explained.

Figure 1 shows crank pulley 2 and fan belt 3.
is stretched, and there is a universal joint 1 between the crank pulley 2 and the rotating shaft 6 of the oil pump P.
7, that is, the spline cylinder portion 2 connected to one end of the universal joint 17.
This drawing shows a state in which the rotating shaft 6 is inserted into the rotating shaft 6, and in this state where the universal joint 17 is connected to the rotating shaft 6, the bracket 4 that suspends the oil pump P is is fixed at a position slid relative to the frame 5 in the direction of the vertical portion 5A.

With the bracket 4 fixed at the position where it has slid in the direction of the vertical portion 5A of the frame 5, the fixing bolts 10, 10 are loosened, and with the fixing bolts 10, 10 loosened in this way, By rotating the bolt 12 in the advancing direction, the bracket 4 is slid along the elongated hole 9 via the step formed on the bolt 12 and the spacer 16, that is, the oil pump P is moved backward. is obtained. By retracting the oil pump P in this way, the rotating shaft 6 separates from the spline cylinder part 20, and by separating the rotating shaft 6 from the spline cylinder part 20 in this way, the spline cylinder part 20 connects to the universal joint. The state in which the spline cylinder part 2 rotates downward about the part 17B as a fulcrum, that is, as shown in FIG.
A state is obtained in which a space is formed with an appropriate clearance between the rotary shaft 6 and the rotary shaft 6.

And like this, the spline cylinder part 20 and the rotating shaft 6
With a space formed between them, the fan belt 3 can be removed by removing it from the crank pulley 2 and passing it through the space. Furthermore, in the state in which the fan belt 3 is removed in this manner, a new fan belt can be installed by stretching it over the crank pulley 2 through the space.

After replacing the fan belt in this way, with the spline cylinder section 20 rotated upward and held in a horizontal position, the bolt 12 is rotated in the backward direction to move the bracket 4 in the direction of the vertical section 5A. By sliding the oil pump P forward, the rotating shaft 6 is moved toward the spline cylinder portion 2.
0 can be obtained. With the rotary shaft 6 fitted into the spline cylinder portion 20 in this manner, by tightening the bolts 10, the connection state as shown in FIG. 1 can be obtained again.

In the above embodiment, the spacer 16 is provided between the stepped portion of the adjustment bolt 12 and the rising portion of the bracket 4 (periphery of the through hole 7), but it is not always necessary to provide the spacer 16. Instead, it is also possible to form the stepped portion to be large and make the stepped portion directly contact the rising portion 4A of the bracket 4 (the peripheral edge of the through hole 7).

In the above embodiment, a small diameter threaded portion 12b is formed at the tip of the adjustment bolt 12, and the bolt 15 is screwed into the small diameter threaded portion 12b, thereby adjusting the rising portion 4A of the bracket 4. However, the means for connecting the tip of the adjustment bolt 12 to the rising portion 4A is not limited to the above method. For example, the method of connecting the tip of the adjustment bolt 12 to the rising portion 4A is It is possible to use any means such as connecting them with a ball joint.

Effects of the invention The invention is constructed as described above.
As mentioned above, a spline tube is provided at one end of the universal joint on the rotation shaft side of the universal joint that connects the engine crank pulley and the rotation shaft installed horizontally on the oil pump, and the spline tube can freely move forward and backward from the rotation shaft with respect to the spline tube. While spline fitting is carried out, an oil pump that horizontally supports the rotary shaft is suspended from the frame so as to be able to move forward and backward, and by moving the oil pump in the backward direction, the rotary shaft is separated from the spline cylinder section. This creates a space between the rotating shaft and one end of the universal joint for passing the fan belt mounted on the crank pulley, making it easy to operate by simply moving the oil pump forward or backward. This made it possible to replace and remove the fan belt.

In addition, in the present invention, the bracket extending from the oil pump is formed into an inverted L-shape with a rising part and a horizontal part, while the frame for suspending the bracket is made to correspond to the above-mentioned rising part. A horizontal part is provided corresponding to the vertical part and the horizontal part, and the rising part is in contact with the vertical part when the rotating shaft is connected to one end of the universal joint. By moving the oil pump forward and backward along a long hole opened in the horizontal part of the frame, it is possible to accurately return to the connection position when the oil pump is slid back and forth from the position where it has been moved forward and backward toward the connection position again. I was able to do it. In other words, it has become possible to improve the workability.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing the mounting structure of the cargo handling oil pump according to the present invention, Fig. 2 is a side sectional view showing the same operating state, and Fig. 3 is a side sectional view showing the conventional mounting structure. . E...Engine, P...Oil pump, 1...
Crankshaft, 2... Crank pulley, 3... Fan belt, 4... Bracket, 4A... Rising part, 4B... Horizontal part, 5... Frame, 5A...
Vertical part, 5B...Horizontal part, 6...Rotation axis, 6a...
... Spline external teeth, 7 ... Through hole, 8 ... Tightening hole, 9 ... Long hole, 10 ... Hanging bolt, 10a
...Threaded portion, 11...Threaded hole, 12...Adjustment bolt, 12a...Large diameter threaded portion, 12b...Small diameter threaded portion, 13...Sleeve, 14...Washer, 1
5... Bolt, 16... Spacer, 17... Universal joint, 17A, 17B... Universal joint part, 18... Flange, 19... Bolt, 2
0...Spline cylinder part, 20a...Spline internal tooth part.

Claims (1)

[Scope of utility model registration request] A spline cylindrical portion is provided at one end on the rotating shaft side of a universal joint that connects the rotating shaft horizontally mounted on the engine crank pulley and the oil pump,
The rotary shaft is spline-fitted to the spline cylinder part so that it can move forward and backward, and a bracket having an upright part and a horizontal part forming an inverted L-shape is extended from the oil pump, and a bracket is installed on the frame side. A vertical part is provided corresponding to the above-mentioned rising part, and a horizontal part is provided corresponding to the horizontal part, and a suspension bolt is inserted into a long hole extending in the front and back direction in the horizontal part of the frame. At the same time, the threaded part is screwed into the horizontal part of the bracket so that it can move forward and backward, and an adjustment bolt whose tip part connects to the rising part of the bracket is screwed into the vertical part of the frame so that it can be adjusted forward and backward. Oil pump installation structure.