JPS5847661A - Speed change unit of mobile working vehicle - Google Patents

Abstract

PURPOSE:To improve the operability by relieving the pressure oil in a speed change passage with an inching valve so that a car can be run intermittently or at a low speed. CONSTITUTION:The pressure oil from an oil hydraulic pump 4 is divided in three directions, one of which leads to an auxiliary speed change oil hydraulic control valve E through an inching valve G, the second leads to the first relief valve 86, accumulator 88, and quick return valve 75, and the last is then branched into left and right steering spools 56, 57. When the steering spools 56, 57 are slid, the pressure oil to advancing/receding spools 54, 55 is fed or cut off, thereby the steering can be performed while the advancing/receding of left and right swing shafts are stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a fourth aspect of the present invention relating to a transmission device for a mobile work vehicle capable of intermittent turning, sharp turning, and intermittent travel using an inching pedal. Construction machinery and transportation machinery work in narrow workplaces, so they are required to make interlining turns, sharp turns, and intermittent slow movement.Moving back and forth in the same place requires quick forward and backward switching operations to carry out transportation. That's why.

In the past, these mobile vehicles were made using the H8T device, but the H8Tit had problems such as poor power transmission efficiency, difficulty setting the speed with a lever, and difficulty setting the neutral position, etc. It did not become popular. The present invention solves these problems by providing a plurality of hydraulic clutch devices, and also improves operability, durability, and power transmission efficiency.In particular, speed shifting is achieved by using hydraulic pressure for sub-shifting provided at the upper level. Forward and backward movement, sudden turns, and interlining rotation are performed by a hydraulic clutch device for forward and backward movement on the left and right turning shafts, and by removing pressure oil from this transmission path using an inching valve, intermittent movement is achieved. It enables the vehicle to run and go slowly, and uses a fast relief valve, quick return valve, accumulator, etc. to avoid the sudden engagement of the hydraulic clutch at the time of start, allowing for a smooth start.

In addition, this inching valve allows the pressure oil for both the auxiliary transmission hydraulic clutch device and the forward/reverse hydraulic clutch device to flow into the lubricating oil circuit, so all the hydraulic clutch devices are in a half-clutch state, or , fast relief pulp, quick return pulp, and accumulator for smooth starting are also effective for both the sub-shift hydraulic clutch device and the forward/reverse hydraulic clutch device, and are the only hydraulic brake device. The hydraulic pump is configured with only a separate circuit so that the brake is not affected by the speed change operation.The object of the present invention is as described above, and as shown in the attached drawings
c) The present invention will be explained in detail based on the configuration of the embodiment.

The following margins are mm, l! 2- is the same (the whole is 'f'-, the front wheel is one, the driving wheel is a bullet stopper and the packet is one, the driver's seat is 4, and the engine is the engine 1).
Acid content of cram school chassis (105) etc. The boom is pivoted by a two-man support stand, and the boom is moved up and down by a hydraulic cylinder. The hydraulic cylinder (67) is a cylinder that works hard to keep the packet horizontal when raising and lowering the pool, and the hydraulic cylinder (66) is a hydraulic cylinder that tilts the packet and allows the transport to fall.Operation 1it2J The Ayane was covered with wire mesh for safety, and FiJ
Driver's seat on W, forward and backward 8 Asahi turns / (-1, left and right steering levers (10 @ I, ) (1 @ IM), it changes Km / (- (107), I: y f y Gbedar (10m) is located.IIEl (2), 萬2-
indicates a wheel-shaped transport vehicle, but this at is a proverb.
It is also a good idea to install it on a two-type mobile work table◎ J? 79 y y lever (xoaL) (xoaR)
It is installed on the left and right in front of the Fi crawler seat.
The rake is configured so that the rake is activated, and when the rake is released, the spring returns to 1 and the number of bullets is 0 again.
As shown in Figure 9, the center of the wM posterior center region rotation lever is neutral (
) In the case of tilting back and forth, the detent device will add &1d to the lever at that position, and the forward movement will be steady.
In the case of MA rotation where the interlining is tilted from neutral to left or right, the lever is biased to return to the neutral position, and only the interlining is tilted left or right. 0 to make a turn
Therefore, while turning the interlining, it is necessary to take your hand off one of the steering levers and operate one lever (to) to the front interlining.
Even if you pull the steering lever with only one hand, the rotation will not stop even if the interlining stops rotating.In order to rotate the interlining smoothly, an inching pedal that can be operated with your foot is provided.0 For slow or sustained progress in cases other than interlining turns, use the left and right steering levers to pHitk:
Oaga-, which is possible if you pull it, is power transmission 1 for mobile work equipment.
Figure: rIIJib showing the placement of - in the JII4 mFii case.

jI5- is the front of the mission case (i) -1jlI6
ail is the same (Tsushi, Ngaasu (rear view of 13, series 7)
The figure is j [6-G-G'2) of Ntsusison case (1)
-#lf1 figure, irises 8 figure are
-H#rrh-.

At the main house, in the case (1)) engine [F] Without installing a raw clutch device that regenerates the carano power, the hydraulic clutch type shifting device moves forward, accelerates, rotates the interlining to the left and right inside the machine, and A low speed change of f4 is possible. Four shafts are distributed in the case (1). Input shaft (7), lli (Mu, left 1km @, right rotation This is the first four episodes.Isshi Soun Case (1) Ha front-
When viewed from above, it has a rectangular shape, with the input shaft (7) at the top center, the variable speed shaft (b) directly below it, and the human power 11 (7) and fine speed shaft. A friend rotation axis (to) and a right IM rotation axis (to) are placed at positions equidistant to the left and right with the trout to be tied as the center. There is a high and low O on the M gear shift shaft (2).
Tandem type hydraulic clutch device that performs 11 changes (24
Hatake) C Hab) is constructed back-to-back in a single body and is equipped with a hydraulic clutch device. The hydraulic clutch device (30b) for forward movement and the hydraulic clutch device 1111J for forward movement are connected to i! equipped with a hydraulic brake system (JO
a) and the hydraulic clutch device (80b) for reverse movement are configured back to back in tandem.
m), hydraulic clutch for 1ik [111 (25b) and hydraulic clutch 1 & position for #JjllI were installed,
The hydraulic clutch devices for the hydraulic play-rii (25 m) and the hydraulic clutch devices for this are built back-to-back in tandem. #i left rotation axis - and right m-axis (
2), and when driving at 6G and forward, the steel j
[From Han, right turn - power is transmitted to each vehicle on the axis, and the right turn - Hat Sakaki Yoru O. Also, when driving backwards, - left turn (2) from the gear shift axis (b)
) The structure is such that power is transmitted to one vehicle on the top (11IjIt4), and power is transmitted from the 11IjIt4 to both vehicles on the right-hand turn -11I (2).

The basic power transmission path is as described above, and if we go into detail about the power transmission path, we will see that the engine (ii'5Lp Power is transmitted from the coupling (6) to the input shaft (7) via the absorber and universal joint. ◎A hydraulic clutch type transmission is mounted on the spline-coupled coupling (6) on the input shaft (7). The hydraulic pump (4) for the scissors holder and the hydraulic pump (5) for the hydraulic brake 1ktIt are fitted, and the rear surface of the case (1) is supported by the pump body. The center plate (2) is sandwiched between the center plate (2) and the Missi and Nkesu sacs are attached to the front surface of the input box (7).On the protruding part of the case, there is a cup that connects with the high-pressure pump for the cutting. The ring ω) is disguised, and a general high-pressure pump mounting body (aDKA pressure pump) is attached to the main case (b). The fixed gear (9) QG is always connected with the loose fitting gear (to) of the sub-transmission shaft. @P & 11 low speed hydraulic clutch hook * (24m) is connected to the fixed gear), loosely fitted gear) - rotation is transmitted to the auxiliary gear shaft shaft) ^transmission^ hydraulic vertical touch device (x4b) or t connected, fixed gear (9) loose fitting vehicle - one rotation is transmitted to the sub-transmission narrow wheel 0 This sub-transmission is for low speed, ? 1i1jI#I Hydraulic Equipment (24
aX24b) O11Rrii9 scene case IIIN
The pressure is selected by the oil pressure control valve I, which is installed on the right side.It is controlled by the hydraulic control valve I, and nine pressures pass through and through the carved oil passage, and the gear is changed to 1iii. The seal case (2) fitted on the front protrusion of the shaft (2) is guided by the #111 Kia 41I #111 Kia 41I wheel, which is guided by the X wave path of the gear shift shaft. At this point, the rear half of the right rotation - 4Il (b), which is transmitted to the right rotation ■@ wheel, the left rotation axis - is connected to the rear half of the single wide yoke on 4Il (b), and the wheel wide Sanfu o4o The rear part of the wide free-fitting gear on the left rotation axis engages with the front part of the Sanfu o4o.The rear part of the wide free-fitting gear on the left rotation axis is engaged with the rear part of the narrow gear on the left. The narrow free-fitting wheel (2) on top of
2) The ball is always turned in the forward direction. - The front half of the narrow wheel is always engaged with the right-handed rotating shaft wheel, and the two wheels are always in mesh with each other. When the aircraft is rotating in the opposite direction, and when the hydraulic clutch device (25b) is connected to @-, the right drive wheel moves backward.9 , when hydraulic clutch device 4 is connected, it will move forward ◎ Which hydraulic clutch device @ (25b) C2m) is not connected together - Hydraulic clutch ifi is connected to o*, which is a 2nd year junior high school student.
The stabbing brake device (
When the 25m) is connected, #A shift is applied when the shafted IIM imperial wing is running by inertia and stops immediately. The hydraulic play spear is used for the A turning force while driving, and since the engine is stopped and no hydraulic pressure is generated when the car is parked, it cannot be moved at all, so the parking brake (&
The ridge is provided on the rear protrusion from the right-handed pivot case (1). The right turning axis 1 (to) is the parking brake C&! ) also protrudes through the X, and transmits power to the rear axle case through the coupling. When connected, the left part moves in reverse), and when the hydraulic clutch device l114IIJ is connected, it moves forward.If both hydraulic clutch devices 1 (10b) and 4 I are connected together, the vehicle moves in reverse. 0 Furthermore, when the hydraulic clutch device (80b) and the nine-grip pressure brake device (30a), which are provided back to back, are connected, the driving wheels of the friendship are cut off when traveling by inertia and are forced into sharp turns. ◎Hydraulic clutch devices for hydraulic brakes are used for sudden accidents while driving.642, while parking,
Since Nishijin 0 is stopped and no oil pressure is generated, 1b1
Since I can't plow one plow, I turned the single brake (currently) to the left rotation axis (
2) The left-turn axis ■ provided on the rear protrusion from the Mitsusheen case (1) protrudes through the parking brake (exit), and the power of the rear axle case is transmitted by the coupling.・When the hydraulic clutch devices (2sb) (2e) are connected and disconnected, both clutches are neutral unless both clutches are negative, but when both clutches are connected and disconnected, it is not 4 r'lkJ.

Also, on the left rotation axis (2) there is a hydraulic clutch device ('J
ob) (It is carried out by 8υ・There are cases where it becomes 1~U with the clutch, but both seats are never in contact ◎Hydraulic clutch device for slippage and hydraulic pressure) L/- The relationship with the chain made of keys is that the hydraulic 7-touch device for forward and reverse movement is in the shape of a sword, and the same is true for b as well. Bairan Sewari 941f (A
9 left and right redirection hydraulic pressure 1tlIJi provided integrally in J
Due to the leakage of pressure oil from the I4 valve, the hydraulic clutch device is temporarily disabled. Meanwhile, the hydraulic brake device (2!a) (80m) is temporarily disabled. ◎ The hydraulic control valve for the hydraulic brake (A5 is installed on the left side when facing the front of the engine case (1), and the left and right hydraulic brake levers are tilted to operate the hydraulic brake lever.
Pressure oil flows to 1 (30a) (!5a) and becomes a ``shield''.The left telescopic brake lever and the steering stool on the left side are delayed by a link and the hydraulic tarlatch device applied at the front. Carp-p
, IIcm is configured so that the hydraulic clutch for the brake will lie down only when the hydraulic clutch device (30b) for reverse is close to leakage due to a pressure oil leak ◎Also, the right negative hydraulic brake system The steering hydraulic control valve of Bart's right hand was also used as an iA play, and the previous iI! Hydraulic clutch device 1 (we) (zsb) for reversing A is damaged due to leakage of pressure oil.
Hydraulic braking equipment can only be used once the
◎Hydraulic brake system (
30a) (2!sa) is operated by a hydraulic pump (
In 5), a separate pressure oil system is constructed, and the kb oil tank is used as the z'-seal ν case, and the same #lubricating oil is used as the hydraulic oil, but the amount of pressure oil is Since there is no communicating oil passage, it is not affected by the pressure of the other side. Also, the pressure oil for forward and reverse movement and the pressure oil for hydraulic brakes are connected together through the same seal case or canal. The spool for forward and backward movement of the hydraulic control # valve prisoner, which is forced to be fed in parallel with the oil passage penetrated into the shaft 0 (to) of the book, can be pushed and pulled in a standing position. , you can move forward and backward with only the left rotation axis, and move backward with only the right rotation axis, and push and pull two stools together.1. Both left and right go forward, backward, and neutral.◎Furthermore, if you reverse the left and right Snowloo pots and pull one and push the other, the right will go forward,
The traveling work vehicle can rotate the interlining in reverse or reverse direction. This operation is mainly done by configuring the forward/reverse interlining rotation lever in the shape of a cross. When tilting left or right, the interlining rotation can be performed in the left or right direction. The hydraulic brake device (j! Jia) (10m) is a hydraulic clutch device l) which is made up of links in order to be carried out. Body (6) @kiy1 is fixed to the inner wall of the seventh interplate (2) attached to the case (1). Then, place the unprocessed material of the friction plate fixing body 4 into the loosely fitted gear (B) (to) on the Jllll speed change shaft or by rotating it.
It is made of the same material as the above Yui Hosofu 0@ This is made possible by using the hydraulic clutch device ■ and the hydraulic clutch device 4 of the same shape. 0IllII is an oil filter for sucking lubricating oil into both the hydraulic brakes and the hydraulic tarlatch, and prevents air from being sucked in even when the aircraft tilts forward.
A guide pipe without a suction hole is provided in the hole 5, and the oil is extracted to the suction oil passage at the threshold between the center plate (2) and the missing case lid.

The front surface of ν case (1) t<A! The other pulp that is used is inching pulp], and when this pulp spool (6) is pushed in, pressure oil flows from the hydraulic pulp for the raw speed change for forward zero extraction to the drain circuit on both the left and right sides. It is used to gradually guide the aircraft in proportion to the amount of interference, advance at extremely low speed, and bring the aircraft closer to other obstacles. ), - the threshold is the parking brake arm.

In addition, as shown in the iris SM, at the tips of the left and right rotating shafts, there is a bevel gear - NJu, which is installed in stone and is transmitted through the nine rear axle case via the any leaf wheel and India.
It is transmitted from the axle on the rear axle to the drive shaft via the final speed gear.

Line 9- shows the hydraulic circuit of the main lock, and line 10- shows the hydraulic circuit of the main lock.
Figure 11 is a side sectional view of the single change over hydraulic control valve (G), Figure 12 is a @ plane alr side view of the hydraulic brake hydraulic control valve 0, Figure 13 is a cross-sectional view of the inching pulp case. As mentioned above, each hydraulic control valve is equipped with a variable speed hydraulic control valve. The hydraulic control valve for the hydraulic brake is attached to the lid of the case on the right side when facing the front of the case, on the left axis in the direction of travel. The inching pulp is affixed to the right side of the front, the left axis of the direction of travel, and the inching pulp is affixed to the fourth part of the case body. and #lIl speed change shaft O
Since the chisels are lined up in a vertical row, the width is narrow, and the rear part of the case is narrow.However, the front part is narrow! 5 and hydraulic pressure 1111s4! Since the mounting surface for the valve and oil passage becomes narrow, the front of the oscillator case (1) is widened and shaped like a square, and the center plate (2) is attached to it.
The Miter 1 case (B) is overlapped to form an oil passage at the joint, and a hydraulic sea bream goben phantom (G) is pasted on the Missi and Nke Aihen body east of the 1M1 side◎ In addition, the left and right lateral snow loops and the left and right front and rear passing spools Vj44 are integrally arranged in the main transmission hydraulic pressure 11 IIIlli11 valve, and the left and right steering spools H-j are the king transmission hydraulic pressure valves. From (2), the left and right WjA1 rear schools H- are protruded from the front of the transmission case (1) to the rear of the transmission case (1).This is the internal school. l is hydraulic pressure for hydraulic brake 1141
This is because it needs to be connected to the left and right brake levers of the N-hole and connected to the steering lever (xosL,) (tosM). Also, the steering lever (1
04iL) (10@R) is pulled by the operator in the driver's seat (toward), so the case ν (
The front of υ is convenient, and the forward/backward movement center m turning lever (towards)
◎Explaining along mmK, there is a hydraulic clerk on the coupling (6) □ of the input shaft (7) where power is transmitted from the engine [F]. A hydraulic pump (4) for the 111M engine and a hydraulic pump (5) for the hydraulic brake system are installed to pump out pressurized oil. The hydraulic pump (4) for the hydraulic clutch type transmission that is closer to the construction case (13) is made thicker to increase the discharge amount, and the hydraulic pump (4) for the hydraulic clutch type transmission device that is closer to the construction case (13) is made thicker to increase the discharge amount, and the hydraulic pump (4) for the hydraulic brake system that is more suitable for the construction case (from υ) is made thicker. Hydraulic pump (a narrow one with a small discharge volume) is installed.In addition, a high pressure pump (10
The hydraulic pump (
4) (Both &J are used as hydraulic oil)
l) Using lubricating oil, ridge the oil filter. First, install the hydraulic pump for the hydraulic brake system (5).
)), the discharged oil flows through the built-in case (the through oil passage in 13 and the center play) (2),
Pass through the oil passage in the lid of the t-scene case, Part 12
fs to the P port of the brake pulp case (104) in the figure.
? &1 ◎ [At the position of the brake spool (95) in Fig. 12, the pressure oil flows through the notch (95b) to the drain oil path (95d), and then flows through the drain oil path (Hd) and the S oil path. (95・), go to the drain path (Hf), K carrot of the Luke spool (SS,,) on the left, go to the brake spool (96), Kirifuyu 11 (98g), and go to the drain narrow path 0. The drain path (96f) and notch (96K) are located in the symmetrical position to the drain path (esf) and notch @ (95g) in the drawing of the 6-ton playing spool.・The drain oil in the left spool also crosses the 6-stool drain and comes out. With this configuration, when you try to apply filjmt by operating one brake spool, Since the drain circuit of the other brake spool is also closed at the same time, pressure oil will not escape from the drain path of the other brake stool. Turning to the right - cutting off the first power and then rotating the brake lever - pushes the playkiss tool (95) downward against the spring (10G) via the lever (58 Todoroki) ◎This causes As a result, the 9P boat and the drain oil passage (96d) are connected through the notch M (95b) and the pressure r
The output goes toward the relief valve (99) and through the through oil passage (s5) to the oil passage (6) to the hydraulic brake fcilit. The relief pulp C99) moves upward against the spring (97), and the P port passes from the narrow passage (99b) through the notch (99a) of the relief pulp C99) to the drain bow) (i19e) 3! ! When the brake lever is rotated further, the body (110) of the spring receiver is pushed by the head of the brake stool (95) via the engagement plate (103) and the spring (117) moves downward. KK and move,
Contract the inner sacrum spring (98) and spring C97).9
Press the leaf "i" (99). This will cause P"-
)0 oil pressure gradually rises to oil pressure y v -* device 1 (25
Therefore, during play, the steering lever (101
1R) 17) The braking force of the hydraulic play device (26 Hatake) can be varied linearly. 0 engagement & (103) is the left and right brake gear 5-
Pulp Teeth (104)
0 (101) is a relief pulp case, which is operated by moving either spool to operate a single relief valve provided in the center of the upper surface of the case to change the IjV-7 pressure.

Next jI! The hydraulic pump for the hydraulic clutch device (4) is inserted into the Ji & 11 hydraulic pump valve ω in Figure 11.
Pressure oil is distributed in two directions, one is the main hydraulic system (
2) The way to go is through the inching valve Q to the #mm delivery hydraulic pressure 1bd #valve ■0 The structure of ininda pulp paddy is shown in Figure 3113.
The pressure oil from hydraulic pump 1 (4) reaches the P boat of the 1 inching valve at 04134m. The foreshadowing in the drawing in Figure 9 shows that the inching valve is in an open state] Hydraulic pump (4)
Hydraulic control for variable speed - The cutting part (61) of the inching spool shaft is not limited by the inching pulp date.
Pressure oil is sent through b). From this state, when the inching pedal (108) is pressed down on the inching pump Q, the inching pedal (108) reaches the notch 11t (61b). Pressure oil flows from i! to L port for fresh oil via inclined @I+ (11m). At the beginning of the inching, the pressure of the pressure oil flowing from the 1&i1 seismic speed hydraulic control valve ■ to the hydraulic clutch device (24, h) (24b) for one-change application causes the inching pedal (1o8) to narrow.
tK decreases according to the clutch's! ! P--The strength of the problem is proportional to the condition. Furthermore, inching pedal (l
og)! ii Pressure oil escapes to the L boat not through the R surface (61a) but through the notch (61b) from the #1i11 variable J hydraulic control valve ■ to the hydraulic clutch mount (2
4m) (24b) also escapes to the drain boat 0 through the notch (li), so the M gear becomes a neutral layer and the P aircraft stops.In this way, the inching pedal (
108) allows you to slow down, slow down, and stop momentarily, so you can control the aircraft by operating it like a raw cod or chibedal.
Q: KIILIOFIJ is able to move smoothly and slowly while walking.
Yop raw and modified hydraulic pressure! 111-Explaining the composition of Bengo,
King shift hydraulic system - In terms of Masu, left and right steering spool M
97J, left and right forward/backward movement spools, second relief pulp (equipment), first relief pulp for smooth starting, Akiemulator-111 & Hikuitsuku return valve (to), etc. are installed. ) The pressure oil is divided into three directions)
, one of them is # through the inching valve G) as mentioned above.
IIRiII Tsukudatsu'ku-valve■, one of the regrets is to flow to the first relief pulp and Aki emulator and quick return valve (to) for a smooth start, and the last one is the shunji direction. It is divided into left and right steering spools ($4vI), and it is divided into left and right steering spools ($4vI).
4t4 pressure oil to wr image and friend's right charcoal Jim
The first step is to stop the process and perform the menko.

The veranda stool on the right side of block 1G- shows the entry of the hydraulic clutch device, and the pressure oil is flowing to the hydraulic latch device M (e) (25b) for the front and rear ports. Notch (
57b) to (157m) 9, oil road -
On the other hand, in the case of a row-shaped mausoleum, the right steering spool is pushed in and the P board is closed & ll late-use spool - Pressure oil flows through the oil path -
, BO) (57a) flows backwards and escapes from the notch mark (57e) to drain boat 0. Same left steering spool m% same, P boat notch c5mb) C56@
), bow) (56 &), and oil passages are provided.

The pressure oil that has reached from the right steering school () to the right forward/reverse spool hook bow) (Iiii &) is from the notch mark (55e) to Enter the forward hydraulic clutch device (to) to the port. That record! ! The pressure oil of the hydraulic clutch device flows from the R port through the notch (sad) to the drain boat 0 (the left steering spool is shown in the reverse position in Figure 1O), and the P port (54 m) pressure/1
The pressure f1jJ that flows from the 1rt through oil passage (ls4b) to the R port and returns from the F port is due to the notch trace (1
(54a) (56m) is gn
Flows to L boat for t. At this time, the pressure oil of the F port flows from the overload oil Ayu (64b) (55b) to the tray 7 boat, and the pressure oil of the R boat flows from the notch (54d) to the drain boat. #411 of the hydraulic clutch device, which supports the lubricating device d, is directed to the oil discharge port, and the oil is directed to the pressure of the hydraulic pump discharge port. Relief from the first relief valve that relieves oil, return from the disconnected hydraulic clutch during each gear shift, and oil from the thin noodles (113a) @
0 that was inserted into the oil port ~ and the neutral # of each control valve
The entire amount of the non-operating pressure oil was directly returned to the Mitsushiron case without going through the second relief pulp. Therefore, the pressure oil from the hydraulic pump was reduced to the Missile case without resistance when it was in neutral. Therefore, the pressure oil that flows into the tray yl path is only the amount that returns from each hydraulic circuit, and the pressure oil that flows into the tray yl path is only the amount that returns from each hydraulic circuit. When in neutral, most of the hydraulic clutches and slave devices did not receive i#. However, when the condition 14i valve was in neutral, especially -ji! The drive plate is rotating directly,
If t4# is not used in a positive manner, the neutral state will continue for a long time and p@slip will occur, causing tangles and making the aircraft thin. In this *operation, when the aircraft is stopped due to indentation pulp & EN and M stop, and when the aircraft is temporarily neutral during forward and backward movement, pressure oil is actively pumped to the second relief pulp, 1 & 11 gear shift, and the right side. *am
haostit oil e ai C1 (11B) haostit oil M
As shown in the figure below, the t4+1 line filter mounting row for oil cleaning is installed at the threshold between the lubricating oil outlet (11B3 and the second relief pulp (2)). Seal case CIh4 of left and right turning @ C14 (6) like IE S tIQ
- is provided between. Pressure of L boat of j4 floor agent tjf
To determine the second relief pulp n, insert the spool hole dividing body into the spool hole of the left steering spool.
) and is installed at the rear of it. When the oil pressure increases, the second relief pulp springs forward (toward).
The L port and drain port communicate with each other and the G
eII! Low-pressure oil flows into the missing cylinder case (1)◎
Also, the spool hole of the right eroding spool no. has a constant stool hole (%) with a bin (80m), and a quick return pulp (to) is installed at the rear to make the start smooth. When the P port of the quick turn pulp (toward) KJM bleeding stool moves to the forward and backward positions, the pressure oil drains into the upper cylinder), pressure is generated, and the quick turn pulp is activated. Push to one side against the spring (to) K. From the inner hook path (75c) of the quick return pulp, through the patterned hole (7Sa), from the port (75b), through the − path (sn), to the port (illm3). ·baud)
(91a) #i Mitsu 1-su Q U-7 Valp (86
) is provided inside the spool hole, and the first relief pulp-〇 spool hole has a spool hole dividing body (90) fixed with a bottle (110b) and divided into front and back parts.
71-strokes are arranged in the section. Pressure is generated in the P port of the first relief pulp 轡 as well as the P boat of the return pulp (~) with the forward and backward movement of t and the shift of Ia,
Push the first relief pulp to the right direction and cut out 111
(Jigm) to the P port's pressure oil hetrain boat, and at the same time as 0, which suppresses the sudden pressure rise of the hydraulic clutch device, the quick return pulp Gumari's hole (75 m)
Hydraulic pressure runs through a narrow path (110m) in front of Akyem Radar.
Akiem Radar with a good fit - When the tube is pushed down, the spring holder is pulp - 〇 Delays the forward movement. However, the accumulator's sj @ also stops due to the improvement in the elastic force of spring 0, and at k/c, pulp 4 moves forward in the spring holder, increasing the elastic force of spring C92) and pushing back the first relief pulp 4. , move 1m1Sfi at the foot of the relief and slowly increase the pressure of the hydraulic clutch device 0 On the other hand, when the gear shift becomes neutral, the pressure of the P boat becomes IfL oil d
As it flows to the tank I tank oil port, the first relief pulp pulp is lowered and the tight cleaner valve (toward) is also returned to its original position by the spring lock to the MD quick return pulp port (
75b) is in contact with the drain boat of the spring base circle, the pressure oil of the Akiem radar flows to the drain, the Akiem radar returns to its original position, and the spring holder that was pushing the spring (92) of the first relief palpu is removed. The pulp is also quickly returned to position #jl of the spool hole dividing body (9o)9,
This is why the 0 quick return pulp is provided, which can bring the pressure oil rise during the next gear shift to close to zero. Switching from forward to reverse, sub-shift 1st to 2nd cycle
Since the change to Hen is done immediately, Monru-hole (76m
), the spring holder removes the pressure oil from the back chamber of the pulp W" [1
In the case of n9, the spring (92) is not drained quickly and the hydraulic clutch is connected while the pressure remains high, resulting in a sudden start. Providing a sub-shift shaft number of a sub-transmission device consisting of a clutch-type transmission, providing a pivot axis on the other apex of an isosceles triangle having the -0 shift shaft as its apex;
A hydraulic crank for forward and backward movement and a sub-device are installed on the rotation axis, and an inching pulp and a relief pulp to smooth the start are installed between the auxiliary transmission hydraulic control valve and the hydraulic pump, and the inching valve is operated by an inching pedal. By depressing the inching pedal, the hydraulic clutch device for gear shifting becomes a half-clutch state for both auxiliary shifting and forward/forward movement, and the half-clutch state can be easily created, and when the auxiliary shifting is engaged. Sulfur relief pulp, accumulator, and quick return pulp ensure smooth operation in both forward and backward gear shifts.
Therefore, it can be used for both auxiliary transmission and forward and backward movement.

[Brief explanation of the drawing]

Figure 1 is an overall side view of a mobile work vehicle that transports earth, sand, granular materials, and powdery materials, Figure 2 is an overall front view, Figure 3 is a power transmission diagram, and Figure 4 is a transmission. Drawings showing the arrangement of the shafts in the case, Figure 5 is the front view of the mission case (1), Figure 6 is the rear view of the mission case (1), and Figure 7 is the 6th diagram of the Mitsushicon case (1). Fig. 8 is a sectional view taken along line H-H in Fig. 6 of the mission case (1), Fig. 9 is a drawing showing the hydraulic circuit diagram of this device, and Fig. 1θ is a diagram showing the main transmission hydraulic control valve. FIG. 11 is a side sectional view of the auxiliary transmission hydraulic control valve (G). - Fig. 12 is a side sectional view of the hydraulic brake hydraulic control valve (C), and Fig. 13 is a side view of the inching pressure control valve (C). (g)...Hydraulic control valve for sub-transmission (4)...Hydraulic pump q...Sub-transmission shaft (2)...Hydraulic pump
4&) (24b)...Hydraulic clutch device CI for sub-transmission
$3...Left and right turning axis (3obX25b)...Hydraulic clutch device for reverse movement Cυ
(To)...Hydraulic clutch device for forward movement (75)...Quick return valve (Foundation)...Accumulator operation...Inching valve (108)...Inching pedal output Junjin Kanzaki Koukou Co., Ltd. Patent attorney representing Shinso Seisakusho Part 12 Figure 'y9

Claims (1)

[Claims] An auxiliary transmission shaft of a auxiliary transmission consisting of a hydraulic clutch type transmission is provided at the upper level, and a rotation axis is provided on the other apex of an isosceles triangle with the auxiliary transmission shaft as the apex. A hydraulic clutch device is provided, and an inching valve and a relief valve for smooth start are provided between the auxiliary transmission hydraulic control valve and the hydraulic pump, and the inching valve is configured to be operated by an inching pedal. Mobile work vehicle transmission