JPS5850327A - Speed change gear of moving working car - Google Patents

Abstract

PURPOSE:To prevent a drag in the neutral position by feeding pressurized oil through an oil path to a second relief valve or jetting the oil from the relief valve to be fed to the second relief valve in the neutral position so as to discharge the oil from the interior of a hydraulic clutch apparatus for lubrication. CONSTITUTION:When a forward and backward moving hydraulic control valve A is located in a neutral position, pressurized oil at a P-port flows into a L- port for lubricating oil, and in case of letting the pressurized oil go from an inching valve D, the oil is allowed to flow into the L-port. furthermore, when a subsidiary speed change hydraulic control valve B is located in a neutral position, the pressurized oil is stopped to be jetted out from a guide departure preventing relief valve C and fed to the L-port. The pressurized oil supplied to the L-port is jetted out from a lubricating oil discharge outlet 80 mounted on each hydraulic clutch apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricating device for a hydraulic clutch device in a hydraulic clutch type transmission.

The hydraulic clutch device is a wet type multi-disc clutch device that connects and disconnects power by contacting and non-contacting multiple I4 friction plates in the oil bath of the transmission case, but when there is no contact, there is no friction between the M vibration plates. Personnel management is about creating a situation where no misunderstandings arise. For this purpose, a lubricating oil passage is provided in parallel to the oil passage in the pipe 1 that sends pressure oil to the cylinder 7 of the hydraulic clutch device, and the lubricating oil is discharged from inside the hydraulic clutch device.

However, in the lubrication circuit of a conventional hydraulic clutch device, the pressure oil ejected from the sudden start prevention relief pulp is received by the second relief valve, and is flowed into the lubrication oil path. At certain times, pressure oil spouts out from the sudden start prevention relief pulp and enters the lubrication circuit, but when the hydraulic control valve is in the neutral position, the P port connected to the pump port is directly connected to the drain port, so the pressure is reduced. All the oil flowed to this drain port, and it did not gush out from the sudden start prevention relief pulp, and the hydraulic clutch device was not drained when it was in the neutral position.

With construction machinery, the machine is often stopped for long periods of time to carry out operations such as loading and unloading, and the gears inside the transmission case may stop rotating while the hydraulic clutch device is set to neutral and the machine is stopped. Stop and stop: Since the 7th case does not shake much, there is no natural lubrication due to droplets, and as mentioned above, there is no forced lubrication, so the lubrication inside the #friction electrode gradually deteriorates, and the aircraft starts to move. There was a disagreement that the situation was progressing. The present invention solves this problem.

The object of the invention is as described above, and the present invention will be described in detail based on the configuration of the embodiment shown in the accompanying drawings.

Figure 1 is an overall side view of the mobile work tunnel, and Figure 2 is the power method for the mobile work tunnel! 1N/11 gland view, Figure 3 is the front view of the Mysongyong case, Figure 4 is a side cross-sectional view of the transmission case, and Figure 5 is -II' of the reverse shaft (14)! 1] is a cross-sectional view.

The immobile work vehicle is a wheeled vehicle with two front wheels and two rear wheels, and the frame is bent horizontally at the front and rear at the giJ part of the Minon Yong case (1) between the front and rear wheels. T NQ.Steerings 7 dollars l (i
The rotation of η moves a hydraulic cylinder, and the power steering system deflects and steers the front section. A bucket (+-15) is arranged at the front of the machine, and the bucket can be rotated up and down by means of a boom U-su and a boom handling stand (2N+pressure nolinder-15). Rear wheel 148)
Engine room, IO) installed on the ground, engine room t! 91
Ennon (5) are placed inside.Engine room (1,
A driver's seat 0Y is installed on the ground, and a forward/reverse gear shift lever decoy, an auxiliary gear shift lever (78), and an inching pedal (11) are installed near the driver's seat 1'48).

The power transmission system will be explained with reference to FIGS. 2, 4, and 5.

On the crankshaft of the engine country = 7 =
”- (Connect the universal joint (7) through 61e, and the tip of the universal joint (7) is connected to the input shaft 1.
(] 1.1. The input shaft Ov is connected to the loosely fitted gear on the forward shaft α4 by means of a gear (19) in the Minyoung case (1). Also, the input shaft Ov is connected to the loosely fitted gear on the forward shaft α4. H)
The tip of the Y self-pressure pump protrudes to the front of the transmission case (1) and drives the pump gear of the hydraulic pump (8) installed on the protrusion, and also drives the high-pressure pump "(]0). (8) is a pump for supplying pressure oil to the hydraulic clutch "A fi&" in the Minyon case (1).
The pressure is as low as 15. On the other hand, the high-pressure pump (10 is bucket y) and the backhoe attached to the rear (this is a high-pressure pump for moving the table, and the pressure is 6
The pressure is as high as 0 to about 100 yen. As for the hydraulic oil, the low pressure pump (8) uses hydraulic oil in the mini-yon case (If).
The high-pressure pump also has a hydraulic oil tank from which it draws hydraulic oil.

The free-fitting southeast of the forward shaft (11:, 2υ is always driven by the gear (JO) on the input shaft Ov, or the loose-fitting gear ←υ is the loose-fitting gear on the reverse #q1+c+4). (86) is engaged at the same time.By vertically operating the spool (5a) with one valve on the forward/reverse hydraulic pressure side using the forward/reverse gear shift lever decoy, the gear changes to neutral, forward, or reverse.Neutral. In the case of AiJ advance pressure extraction clutch device (
81) and the reverse hydraulic clutch device (88) are both "Misaki"
state. In the case of forward movement, power is transmitted from the IH pressure clutch device (8 horns are in contact with the loose fit tooth east 121) to the fixed gear (a) via the forward shaft (14), The power is transmitted from the fixed gear (7) to the fixed gear on the auxiliary gear (13), and the power is transmitted to the auxiliary gear (I31).
3) becomes “connected” and the gear (19, reciprocal gear (2))
Since the fixed gear (371) is constantly meshed with the fixed gear 4 on the sub-transmission shaft 03, the power is transmitted to the sub-transmission shaft 0■. It will be done.

Sub-transmission 11qt+ (The fixed gear (A) on 131 is engaged with the forward binary axis θ, and the one gear (A) (87) with the same number of teeth as the reverse shaft (14), Axis (1 reverse axis (
14) is located on the apex of the base of the isosceles triangle centered on the sub-shift axis (id) as shown in Fig. They are meshed and interlocked by two loose-fit gears with the same number of teeth.With this configuration, rotation at the same speed in both the forward and reverse directions is transmitted to the sub-shift shaft.In this way, the forward and backward shifts are In contrast to the gear shifting by the two-dimensionally arranged hydraulic clutch and child device MK, the sub-shift IIIIII03 performs a three-dimensional gear shifting in the backward direction.

1,! IJ et al., auxiliary transmission shaft (1: 2nd speed from the front on the tank,
3rd speed, 1st speed hydraulic clutch device (821t%) ta
5) are installed on each hydraulic flanch device (view 34.1 (85)
Free-fitting gears (A), (C) and fW are provided, and the corresponding loose-fitting gears (C) and fW are used as a sub-shift. It starts rotating integrally around axis 0].

Loosely fitted gears (A) (C) (The gradient is constantly meshed with the fixed wheel e4 on the counter shaft θυ and transmits power to the counter shaft QO. The rotation of the counter dl + Qυ is caused by the grooved gear (
The power is transmitted from the fixed wheel OQ to the drive shaft through the drive (1) (1).

The front end of the drive shaft (Q) is coupled to the rear pinion MlO, and the front end of the drive shaft (061) is transmitted from the coupling Q8 to the front pinion shaft via a universal joint in a bendable manner.

The Minyong case (1) is a box with an integral front wall and is open afterward.The rear surface is covered with a center plate (2), and the lower part protrudes rearward from the sub-transmission 1 position 03, so the lid body (4
). The FD oil road plate (3) is attached to the front of the mission case (1), and the hydraulic pump (8) and seal case (88) + 89) 140) are attached to the front of this oil road plate, and the forward shaft, Pressure oil is sent to the gear shift shaft and reverse shaft 04).

Also, as shown in Fig. 7, the strainer (opening and installation) is also done on the oil passage plate (3).

As shown in FIG. 3, various hydraulic devices are attached to the front of the oil passage plate (3) on the front of the transmission case (1). Input shaft (1υ) with a second relief pulp (G) lid (6 clauses) on the lower side, an inching valve (G) on the right side of the input shaft (1υ), and a sudden start prevention relief valve (Q) on the right side. Install the sub-transmission hydraulic pressure 1ttlJ control valve (B),
A hydraulic control valve for forward and backward movement is provided on the lower right side, and a fixed body (6), such as a strainer, is provided below it. 1) is a dipstick device.

Fig. 6 is a hydraulic circuit diagram of this transmission, Fig. 7 is a side view of the hydraulic control valve for forward/reverse movement, and Fig. 8 is a side sectional view of the hydraulic control side 1 valve (B) for auxiliary transmission. , Figure 9 is a side sectional view of the inching valve (2), Figure 10 is a side sectional view of the IJ valve (C) that prevents sudden start, and Figure 11 is a side sectional view of the second relief pulp (G). .

Following the movement of hydraulic oil and explaining the hydraulic system and its functions, the lubricating oil force accumulated at the bottom of the transmission case (1) is formed between the center plate (2) and the rear surface of the transmission case (1). The hydraulic oil is sucked in from the strainer (2a) through the suction oil passage (2a).The sucked hydraulic oil flows from the oil passage in the center plate (2) through the connection oil passage (1a) in the minyon case (1). The oil enters the joint oil passage between the front surface of the solution case (1) and the oil passage plate (3), rises, is sucked into the hydraulic pump (8), and is discharged as pressure oil.

Strainer (Open: Connecting oil passage (1) fixed between the center plate (2) and the front of the transmission case (1)
a) located within and protected by the surroundings;

When the engine is stopped, a general strainer is immersed in the hydraulic oil, but the strainer of this configuration is placed above the oil level and filters the lubricating oil while it is being sucked in, making it easy to clean. Therefore, the hydraulic oil will not run out even if you take it out. You can remove the strainer attachment (08) and take out the strainer ((a)) together with the human body (injected body field) for cleaning.

(54a) is a leaf spring which brings the barb body βb) and the strainer (541) into close contact.

The pressure oil discharged by the hydraulic pump (8) is the sub-shift oil pressure 1
Reach the till cape valve (B).

Pressure oil is sent to the P port in FIG. Figure 8 shows the neutral state, and the P port is layered with the other end of the penetrating oil passage (56a) closed, so the pressure oil flows in the direction of the sudden start prevention IJ valve (C). There is.

Also, the return oil from the F3 port of the hydraulic clutch device for forward 3rd speed goes from the small diameter part (56d) to the drain port. Similarly, the F2 port goes from the sliding part (56c) to the drain port. The F1 port also goes to the notch part ( 56d) to the drain port b.

When the auxiliary transmission spool 6) is raised one step, the P boat is connected to the Fl boat through the notch (56b), and the pressure oil is brought into contact with the first hydraulic clutch device. F'
The 2nd boat has a penetrating oil passage (56a), and the F3 boat has a small diameter section (56d)! - Connected to lane boat.

When pulled up one more step, the P port connects to the F2 boat through the notch (56b) and becomes the 2nd auxiliary gear, and the F3 port connects to the sliding portion (56a) through the oil passage (56a) through the Fl boat.
c) is connected to the drain boat.

When pulled up further, the P boat is connected to the F3 boat through the through-hole oil passage (56a) and becomes the 3rd auxiliary gear. It is connected to the drain port via.

In addition, the pressure oil of the hydraulic pump (8) is connected to the inching valve (to)
0, which is supplied with oil through the forward/reverse valve (5) (
The inching valve (2) releases the pressure oil from the hydraulic pump by depressing the inching pedal σ1).
) Momentarily reduce the pressure and shake. Even if each hydraulic clutch device is in the "engaged" state, operation of the inching valve (2) changes all the clutches to a half-clutch state or the hydraulic clutch devices for forward and backward movement to a disengaged state.

The state of the inching valve shown in Fig. 9 shows a completely closed state, and all pressure oil flows from the P boat to the A port via the notch (57b), and the hydraulic control valve for forward and backward movement (5).
It is flowing to. From this state, inching pedal (71)
When the inching valve (to) is pushed in, the tilting surface (57c) communicates with the boat, and part of the pressure oil is transferred to the lubricating oil boat. It flows. ■The port is connected to the seven-way relief valve■, but the second relief valve is set to a low pressure of 2 to 3, so the hydraulic circuit is connected to 2 to 3.
The pressure becomes so low that the auxiliary transmission hydraulic clutch device becomes a cow clutch.

By depressing the inching pedal (71) against the spring j++9) so that the inclined surface (57c) gradually opens to the L port, the strength of the half-clutch state can be adjusted (12). When the inching pull (φ7) is depressed, one ball of the A boat is connected to the drain port, and the hydraulic clutch device for forward and backward movement is completely disconnected.

However, since the pressure oil in the auxiliary transmission hydraulic clutch device is held back by the second relief valve (G), the clutch remains in the half-clutch state.

Pressure oil that has passed through the inching valve (to) rises to the forward/reverse hydraulic control valve.

Figure 7 shows the neutral state of forward/reverse gear shifting, and the pressure oil that has reached the P port is absorbed by the notch (5) of the forward/reverse spool (53).
3c) Flowing from the boat to the lubricating oilway. When the forward/reverse spool (53) is raised, it moves forward, and the pressure oil in the P port flows from the through oil passage (53b) to the F port and reaches the forward hydraulic clutch device (3]j.On the contrary, the forward/reverse spool (53) ) is lowered to move backward, the pressure oil of P port 1- flows from the notch (53c) to the R port, and the reverse hydraulic clutch device (33) is brought into contact.

When the inching valve (C) is open and the forward/reverse hydraulic control valve is in a position other than neutral, the auxiliary transmission hydraulic control valve (B) can be in any position, allowing pressure to rise without losing an escape route. start. J on pressure? 4. If this occurs suddenly, the piston of the hydraulic clutch device will move rapidly, causing a sudden change in power by 1 meter, resulting in a sudden start. In order to prevent this, a sudden start prevention relief valve (C) is provided at a station that delays the rise in pressure in such a case. The pressure oil is in the 7 cylinder of the hydraulic clutch device and this sudden start prevention IJ IJ
- It communicates with the P port of the spool valve C), but the spring force of the histone return spring of the hydraulic clutch device is stronger than the spool
) is larger than the spring (62) of
) The pressure oil that has entered the relief valve (63) causes the spring (62
By connecting the push notch (63b) and (υ boat) against the pressure, the pressure oil is released to the L boat I. At the same time, the quick return valve (58) also moves to the left and the crest hole ( s8a) and the notch (59a).At this point, the pressure of the pressure oil will not rise forever, so the spring (62a) will gradually open up.
), it is necessary to increase the reaction force of the accumulator (50) through the hole (58a) from the quick return valve and the P port in the spring receiver. Pressure oil enters through the oil passage (59e), and the spring receiver pushes the spool t61 to increase the spring force of the spring (62).

At this time, the quick return pulp (pulp) is pushed by the pressure oil of the P port and moves to the left against the spring (υO).

At that time, in order to make the rise of the hydraulic curve gentle,
1) Pressure oil that has entered the back chamber (59c) of the accumulator (5g) through the hole (58a) and cutout (59a) is guided, and the accumulator (59) is moved against the spring μsj. After moving the achimulator to the right in FIG. 10, the spring receiver is configured so that the spool (6D) moves to the right. As the spool moves, the spool (brocade) gradually returns, and the pressure of the hydraulic clutch device reaches the specified pressure, resulting in a connected state. From this state, when the forward/reverse hydraulic control valve (3) returns to the neutral position. When the inching valve (2) starts to flow pressure oil to the L boat, the pressure of the P boat of the sudden start prevention IJ IJ-no valve (C) starts to drop because the oil pressure at the L port is low at 2 to 3 yen. Due to the decrease in pressure, the accumulator (59).The spring holder will return to its original position immediately, and the spring holder will return to its original length and the IJ IJ-Hvarupu Misaki will move to the left and right, and the P port will also close. (15) If you remove the pressure oil and lower the oil pressure curve to close to zero, the next time you shift, the clutch will connect from a low pressure close to zero, so sudden start will not occur, but quick return valve (B8) Push it to the left with pressure oil from the P port to open the crest hole (
58a) and the notch (59a) of the accumulator (5g).
) through the back chamber (59c) of the accumulator (69)
Since the spring holder is guiding pressure oil to the back chamber (61a) of the spool (six swords), when it returns, it passes through the crest hole (58a) and comes out. It is not possible.The quick return pulp (58) is installed on the cigarette, and the spring holder is used to connect the quick return pulp (58) to the pressure of the P port when sending pressure oil to the back chamber (61a) of the spool. The Nonone Uke can only enter the back chamber (61a) of the spool by pushing it to the right against the spring (00) with oil and passing through the crest 9 hole (58a), but the back chamber (61a) When the pressure oil returns, the quick return valve (60) is pushed back to the right by the nokune (60) due to the decrease in the pressure oil at the P port, and the gauze hole (60) is pushed back to the right.
SSa) moves to the right, and the return oil in the notch (59a) is transferred from the spring chamber of the spring (60) to the drain oil path (59b) (
16) After passing through V, the escape spring holder moves to the left,
Next, when the gear is shifted, the IJ valve blows out low pressure to prevent sudden start.

In this configuration, the sudden start prevention IJ IJ-F valve (C) is configured in two stages, upper and lower, and the IJ IJ-7 valve suppressor) and spring holder are installed in series with the spool desk and spring (62) in one P stage. An accumulator (59) is provided on the outer periphery of the curved blade stage, and a quick return pulp is placed inside the accumulator (59) on the inner periphery.

As shown in the hydraulic circuit diagram in Figure 6, the forward/reverse hydraulic pressure section j control valve (
5) is neutral, the pressure oil in the P port flows to the lubricating oil port, and the pressure oil is transferred from the inching valve (to) to the inclined surface (57
It is also sent to the report when it is released from c). In addition, the auxiliary transmission hydraulic pressure control valve (B) stops the pressurized oil when it is in neutral, and sprays out the sudden start prevention IJ lub (C) and sends it to the report.

Previously, the only pressure oil that reached the report was the one that leaked from the sudden start prevention relief valve (C).

The pressure oil of each hydraulic control valve when it is in neutral is drained (17 times).
) It was connected to the road. Therefore, during neutral gear shifting, the pressure oil in the pump port communicates with the drain and becomes almost zero, and the sudden start prevention relief valve (Q) does not spray (the lubricating oil discharge port (801) does not spray from the 0 port. There wasn't.

Lubricating oil discharge ports (DOL are open on the forward shaft 0 and reverse shaft 04 equipped with each hydraulic clutch device) and the auxiliary transmission shaft Oa, and are located at the shaft end of each seal (x (813) g (39)) The oil passages (38a), (40a), and (39a) lead to the respective discharge ports (80). Pressure oil discharged from the lubricating oil outlet 2 lubricates the friction plates of the hydraulic clutch device from the inside, but if lubrication is not performed for a long time when the vehicle is in neutral, the friction plates may become tangled and the vehicle may stop. The axle that was supposed to be there started to move and became stuck. To prevent this, the system is designed to discharge lubricating oil even when in neutral.

The pressure of the (L) port for lubricating oil is set low.
is illustrated. Attach the valve case (65) to the oil passage plate (3
) and Miso/Yonkesu (11), stop it at the stepped part (18) and insert it, and insert the glue 6j and spring (18) into the valve case.
67] and is equipped with a second relief valve lid (fixed with 6 bolts).

When the pressure starts to rise above the set value, pressure oil enters the back chamber of spool d6J from the oil hole (65a), pushes the spool to the left against the spring (67), and the notch (
66b) communicates with the notch (65b) of the valve case (65), through which low-pressure lubricating oil flows. In this way, in this configuration, the hydraulic clutch device is actively activated even in the neutral state (as described above, the present invention stores the discharged oil spouted from the relief valve in the connected state of the hydraulic clutch device in the second relief valve). In addition, in the configuration that forcibly lubricates the hydraulic clutch device, pressure oil is sent to the second relief valve via the oil path during the neutral state, or the IJ I
It is configured to eject from the J-no-valve and send it to the second relief valve, and lubricate the hydraulic clutch device from inside the hydraulic clutch device even when in neutral, so it is possible to lubricate the hydraulic clutch device during neutral, which was not done with conventional transmission cases. Since this can be done forcibly, it is possible to prevent entanglements and erroneous launches when in neutral when the aircraft is parked and used for long periods of time to perform work such as a backhoe.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the mobile work vehicle, Figure 2 is a power transmission diagram of the mobile work vehicle, Figure 3 is a front view of the transmission case, Figure 4 is a side sectional view of the transmission case, and Figure 5 is A side sectional view of the reverse shaft (14), (2o) Fig. 6 is a hydraulic circuit diagram of the device of the present invention, Fig. 7 is a 1Jll1 curved sectional view of the forward/reverse hydraulic control valve, and Fig. 8 is a sub-transmission oil. The side sectional view of the inching valve (B), Figure 9 is the side sectional view of the inching valve (towards) [Side view, Figure 10
The figure is a side view of the sudden start prevention IJ valve (6), and Figure 11 is a side view of the second relief valve side. (Separate to Isao III 3)...Hydraulic clutch device-)...Relief valve for preventing sudden start (66)...Second relief valve (80)...@lubricating oil outlet Prisoner...
Forward/forward hydraulic control valve (B)...Hata 1] Gear shift hydraulic control valve
(To) Inching valve ■ Lubricating oil path Applicant: Kanzaki Kogyo Kogyo & Machinery Co., Ltd. Agent Patent attorney: Toshikazu Yano (21) JP-A-58-50327 (10)

Claims (1)

[Claims] When the hydraulic clutch device is in the connected state, the discharge oil coming from the jJ IJ-Fvalp is stored in a second relief valve and the hydraulic clutch device is forcibly lubricated. A transmission device for a mobile work vehicle, characterized in that the power is sent to a second relief pulp, or is ejected from the relief pulp and sent to a second relief valve, and is discharged from the inside of a hydraulic clutch device even in a neutral state.