JPH02134461A - Speed change mechanism of geared transmission for vehicle - Google Patents

Abstract

PURPOSE:To provide required selecting motions without using a complicated coupling mechanism by sliding a maneuvering shaft to left and right with leftwise/rightwise tilting of a mesh shift lever, and by engaging and disengaging the foremost of a shift arm in a single piece with this maneuvering shaft with/ from a shift fork. CONSTITUTION:A casing 58 of a transmission is equipped with a bracket 78, on which a lever pivoting member 82 is mounted rotatably round the axis of a maneuvering shaft 84 pivoted in the direction across the car width, and then a shift lever 76 is pivoted. A coupling piece 85 is fixed to the maneuvering shaft 84, and the bottom of this shift lever 76 is detained, and a shift arm 95 is fitted to the maneuvering shaft 84 consolidatedly. When the foremost of this shift arm 95 is detained removably with a shift fork 99, which moves axially the shift gear meshing selectively with either of the gears consolidated with the transmission shaft, the fore-and-aft swinging of shift lever 76 turns the maneuvering shaft 84 either regularly or reversely to put the shift arm 95 into fore-and-aft swing. Thus desired shift operation is obtained. The desired selecting operation can be thus performed in simple mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speed change mechanism for a gear type transmission for a vehicle that can be operated by a speed change lever disposed on the side of the vehicle body.

[]''Ll In a conventional gear type transmission mounted on a vehicle, the speed change shaft is usually oriented in the longitudinal direction, and a shifter gear that selectively meshes with one of the gears is integrated with the speed change shaft. It is designed to be able to move in the longitudinal direction of the vehicle body, and the two or more shift rods for moving this shifter gear in the (tJWk direction?) are also oriented parallel to the gear shift axis, so there is a selective A gear shift lever that moves one of the shift rods by 1Δ in the longitudinal direction at tA4 is disposed directly above or above the transmission.

1 and C3"1' However, in a vehicle such as a general automobile, the inside of the vehicle is wide and the driver is usually seated on the right side of the heavy person or on the left side of the vehicle, so the gear type transmission is [1] Even if the vehicle is mounted in the center of the vehicle and the gear shift lever is positioned in the center, there will be no problem in gear shifting operation; Since it is installed in the center, the gear shift lever must be placed on either the left or right side, and as a result, one of the multiple shift arms oriented in the longitudinal direction of the vehicle body can be selectively slid back and forth. It is necessary to connect the gear shift lever and the gear shift lever using a complicated connection mechanism.

The present invention relates to an improvement of the transmission mechanism of a dual-width VA vehicle type transmission that overcomes such difficulties, and is equipped with a gear type transmission in which the transmission shaft is oriented in the front and rear direction. In a vehicle equipped with a driver's seat, an operating shaft is slidably and rotatably supported in the upper part of the transmission casing in the width direction of the vehicle body, and adjacent to the operating shaft is attached to the transmission casing. A bracket is attached, and a lever pivot member is provided on the bracket so as to be rotatable about the axis of the operating shaft,
A speed change lever is pivotally attached to the lever pivot member so as to be tiltable in a front-back direction perpendicular to the axis of the operating shaft,
A connecting piece is fixed to the operating shaft, a lower end of the speed change lever is engaged with the connecting piece, and a shift arm is integrally attached to the operating shaft.

In the present invention, in a vehicle equipped with a gear type transmission with a gear shift shaft oriented in the front-rear direction and a driver's seat above the transmission, the gear shift (operating by passing the upper part of the casing in the width direction of the vehicle body) A shaft is slidably and rotatably supported, a bracket is attached to the transmission casing adjacent to the operating shaft, and a lever pivot support member is mounted on the bracket so as to be rotatable about the axis of the operating shaft. [J, a gear shift lever is pivotally attached to the lever pivot support member so as to be tiltable in a front-rear direction perpendicular to the axis of the operating shaft, a connecting piece is fixed to the operating shaft, and a lower end of the gear shift lever is attached. is engaged with the connecting piece, and the shift arm is integrally attached to the operation shaft, so that the shift arm is attached to the shift fork that axially moves a jitter gear that selectively meshes with one of the gears integrated with the transmission shaft. When the tip of the shift arm is engaged in a detachable manner, the shift lever is moved forward and backward by 11 degrees, and the operating shaft is rotated in the forward and reverse directions, and the shift arm is swung to T\II.
The shifter gear 17 moves in the axial direction in response to the swinging of the shift arm, and a required shift operation is performed.

Further, in the present invention, when the gear shift lever is tilted left and right, the operating shaft slides left and right, and the tip of the shift arm integrated with the operating shaft engages and disengages from the shift fork, thereby performing a required selection operation. be exposed.

An embodiment of the present invention illustrated in FIGS. 1 to 9 will be described below.

The tractor 1 includes an engine 3 at the front of a vehicle body 2, and the power of the engine 3 is changed to a required gear ratio by a transmission 10 via a power transmission shaft 4, and is transmitted to front wheels 5 and rear wheels 6 or rear wheels 6. It is intended to be transmitted only to

In addition, in the main transmission 11, as shown in FIG.
Axis 16. A first shaft 17 is rotatably supported, and the input shaft 14 is connected to the second shaft 1 via a gear pair 18a, 18b.
5, the clutch inner 19b of the main clutch 19 is integrally fitted to the second shaft 15,
Three pairs of hydraulic clutch gears 20, 21, and 22 are interposed between the second shaft 15 and the third shaft 16, and a reverse gear/hydraulic clutch gear pair 23 is interposed, and these hydraulic clutches are interposed. Gear pair with 20.21.22. By setting any one of the reverse gear/hydraulic clutch gear pair 23 to the connected state, the main transmission 1i11 is changed to a predetermined speed ratio 'a' or reversed.

Further, the PTO input key set gear that is fitted to the input @ 14 via the one-way clutch 24 is connected to the hydraulic clutch equipped gear 27 that is loosely fitted to the fourth shaft 17 via the idler gear r26 that is connected to the second shaft 15 at T11. are meshed with
By setting the hydraulic clutch equipped gear 27 to the connected state, the fourth shaft 17 is rotationally driven.

Furthermore, as shown in FIG. 4, the third shaft 1G extends into the auxiliary transmission 12 (actually, it is a separate shaft, but is spline-fitted on the same center line), and the auxiliary transmission 12, the rear wheel drive Ijd is parallel to the third axis 1G.
28, intermediate shaft 29. Front wheel drive shaft 30. Rear PTO shaft 31. A PTO intermediate shaft 32 is rotatably supported, and a medium speed drive gear 33° and an intermediate shaft drive gear 34 are integrally formed on the third shaft 1G in the sub-transmission 12, and a high speed drive gear 35 is also integrally formed therein. The idler gear 3G is fitted in a rotatable manner.

Moreover, the high-speed shift gear 17 is spline-fitted to the rear wheel drive fJJ @28, and the high-speed driven gear V38,
The low speed driven gear 39 is rotatably fitted, the high speed driven gear 38 is meshed with the high speed drive gear 35, the low speed driven gear 39 is meshed with the small diameter gear 36a of the idler gear 36, and the high speed shifter gear 37 is in the rear position I, in the center. When shifted to position ■, forward position ■,
The high-speed shifter gear 37 is spline-fitted to the low-speed driven gear 39, meshed with the medium-speed drive gear 33, and spline-fitted to the high-speed driven gear 38, so that it can be switched between neutral, medium speed, and high speed.

Further, the intermediate shaft 29 has a low speed driven gear 40. Low speed idler gear 41. @The wheel idler gear A742 is rotatably aligned, and the low speed shifter l''p43 is spline-fitted to the low speed driven gear 40, and when the low speed shifter gear 43 is shifted to the rear position, the center position B, and the front position C. The low-speed shifter gear 43 is spline-fitted to the low-speed idler gear 41, or only the low-speed driven gear 40 is spline-fitted, or is meshed with the idler gear 45, so that it can be switched to low speed, neutral, or very low speed.

Further, the front wheel drive shaft 30 has a driven gear 44. The idler gear 45 is rotatably fitted and the intermittent shifter 4
6 is spline-fitted, and when the intermittent thick 4G is shifted rearward or forward, the front wheel drive shaft 30 is connected to or disconnected from the driven gear 44.

A front wheel drive gear 41 is spline fitted to the rear wheel drive @28, this front wheel drive gear P47 is meshed with a driven gear P42a of a front wheel idler gear 42, and a drive gear 42b of the front wheel idler gear 42 is meshed with a driven gear 44. When the contact wheel drive shaft 28 is rotationally driven, the driven gear 44 is also rotationally driven.

The rear wheel drive @28 and the front wheel drive shaft 30 are connected to the rear wheel 6 and the front wheel 5, respectively, via a differential fJJ device (not shown).

In addition, a rear PTO shaft 31 is rotatably fitted on the fourth @17 axis on the first axis, a PTO drive gear 48 is integrally formed at the rear end of the fourth shaft 17, and a PTO drive gear 48 is integrally formed on the rear end of the fourth shaft 17.
The shifter gear is spline fitted and the PTO
A driven gear 50 is rotatably fitted.

Furthermore, the PTO drive gear 48 is located at the PTO intermediate @32.
゜PTO shifter gear 49. Intermediate gears 51, 52, and 53 that can mesh with the PTO driven gear 50 are integrally provided, and the PTO shifter gear 49 is located at the rearmost position α.
, the rear position β, the middle gate position γ, and the front position δ, respectively, the PTO is switched to 1st gear, neutral, 2nd gear, and 3rd gear.

Furthermore, a front PTO drive gear 54 is integrated with the front part of the fourth shaft 11, and a front PTO shaft 55 is rotatably supported adjacent to the fourth shaft 17 in a direction parallel to the front. 1 of the front PTO shaft 55! A front PTO driven gear V56 that meshes with the front PTO drive gear 54 is rotatably fitted to the I end, and a shifter 57 is removably spline fitted to the front PTO driven gear 5G.
It is provided on the O axis 55.

As shown in FIGS. 1 and 5 above, the driver's seat 7 is located above the transmission 10 and is installed in the intermediate rest position 2, and the rear rear steering wheel is mounted on the left side of the transmission 10. A fuel tank 9 is located below the left and right rear fenders 8g and 8r.
In the front part, there are operating panels 71j, 7 of the transmission transmission mechanism 70.
R is placed.

Further, an I-shaped main transmission guide plate 72 is formed in the front part of the right operation plate 71r, as shown in FIG. A gear shift guide groove 73 and a PTO transmission continuous shooting guide groove 74 are formed, and these main transmission guide grooves 72. f711 transmission guide full 73. A main shift lever 75 is located in each of the PTO transmission continuous shooting id grooves 74. t) The gear shift lever 76 and the PTO gear shift lever 11 are loosely fitted so as to be movable along the groove shape, and are moved from the front to the rear of the I-shaped main transmission guide 72 to shift to 3rd gear, 2nd gear, and 3rd gear.
Speed ■, 1st speed ■, neutral ■, and retract position ■ are set, and the main shift lever 75 is moved along the main shift guide groove 72 to change to 3rd speed, 2nd speed, 1st speed, neutral, and reverse position. ■、■、■、■
, (2), a hydraulic main shift mechanism (not shown) of the hydraulic main shift n11 operates, and the main transmission 11 performs a switching operation.

Furthermore, the sub-transmission guide 73 has two shift guides f+% 73a, 73b oriented in the longitudinal direction, and a selector 73 oriented in the left-right direction that connects the neutral position ■ of both shift guides 73a, 73b to the phase η. fM73C, and the Hatake speed shift guide 73a is sequentially set with a neutral position ■, a medium speed position ■, and a high speed position ■ from the front end toward the rear, and the front end neutral position ■ of the n-speed shift guide f, 73a is set sequentially from the front end to the rear. A neutral position (■) is set at the center of the low-speed shift guide groove 73b located on the outside of the shift guide groove 73b, and a low-speed position (2) and a very low-speed position (@) are set in front of this neutral position (2).

Furthermore, as shown in FIG.
At the top of the mission case 58 on the li side, parallel to the vehicle width direction/
Two support protrusions 59 are formed at v, and these support protrusions 59
An m-thread 60 is provided in each.

Two elongated holes 79 are formed in the top piece 78a of the L-shaped bracket 78 at an interval approximately equal to the phase n interval of the female thread 60. Attachment by screwing onto the bracket 60 [Nobolt 80 allows the bracket 78 to be mounted on the sub-mission case 58 so as to be adjustable in the width direction.

Moreover, the lever pivot member 82 is fitted into the sleeve portion 78c protruding outward from the side piece 78b of the bracket 78 via the bearing 81, so as to be rotatable about the width direction.
The base 7 of the sub-shift lever 76 is connected to the ear 82a of the lever pivot support member 82 via a pivot bolt 83 oriented in the front-rear direction.
6a is pivotally mounted so as to be tiltable left and right.

Further, an operation bearing portion 61 is formed on the center line of the sleeve portion 78c and located closer to the center of the vehicle body than the sleeve 78c of the bracket 78, and an operation shaft 84 is formed on this operation bearing portion 61.
When the bracket 7 is rotatably and slidably fitted, the bracket 7 is rotated and slidably fitted.
8, a connecting piece 85 is fitted to the outer end of the operating shaft 84, and a connecting bolt 86 is inserted through the connecting piece 85 and screwed onto the operating shaft 84. It is integrally fixed to the operating shaft 84, and the connecting piece 8
5 is a lower end bifurcated portion 7 of the sub-shift lever 76 (ib is provided with an anti-friction plate 8
The lower end 2 of the n1 shift lever 7G is held by a connecting bolt 88 which is parallel to the pivot bolt 83 which passes through the lower end two-pronged portion 76b, the hole in the anti-friction plate 87, and the groove portion 85a of the connecting piece 85. Further, 76b is connected to an operating shaft 84, and when the shift lever 611 is tilted to the left or right, the operating shaft 84 is connected to the operating shaft bearing portion 61. When slid left and right by the slide shaft 62 and swings the sub-shift lever 76 face-to-face, the operating shaft 84 is moved to the operating bearing portion 61 . It is designed to rotate and hang around a slide shaft 62.

Further, as shown in FIG. 8, a bifurcated interlock connecting member 90 is rotatably fitted to the operating shaft 84, and a left side piece 90a (right side in the drawing) of this interlock connecting member 90 is connected to the operating shaft 84. A compression coil spring 93 is interposed, and interlock pieces 91 and 92 are integrally fixed to both sides of the interlock connecting member 90.
Adjacent to the outside of 92 is a fast shift 1-arm 94. A low speed shift arm 95 is fitted together with bolts.

Furthermore, the high-speed shift fork 96 engages the high-speed shifter gear 37 and the low-speed shifter gear 43, respectively, illustrated in FIGS. 4 and 5. The low speed shift fork 99 is connected to the third shaft 16. A slide shaft 62 parallel to the intermediate shaft 29, etc. The slide shaft 63 is slidably fitted, and as shown in FIG. 9, the base of the high-speed shift fork 96 has a slide recess 97 parallel to the horizontal direction of the high-speed shift fork 96. An engagement notch 98 is formed downwardly and outwardly, and 1. of the low speed shift fork 99 is formed. Engagement notch 10 in S part
0 is formed, and the sub-transmission case 58 is provided with a protruding stopper 64 for restraining the rocking of the interlock pieces 91 and 92, so that no axial force is applied to the operation shaft 84. In other words, when no operating force is applied to the sub-shift lever 76 in the left-right direction, the spring force of the compression coil spring 93 causes the operating shaft 84 to move to the left (the fifth
8), the inter 1 cock piece 91 enters and covers the slide relief 97, the high speed shift 1 arm 94 engages with the engagement notch 98, and the low speed shift arm 95 engages with the engagement notch 98. After being disengaged from the engagement notch 100, the inter-1 knob piece 92 engages with the engagement notch 100, and as a result, the sub-shift lever 76 is fully engaged with the high-speed shift guide of the sub-transmission guide 73. 3a, the high-speed shift arm 94 is moved forward one degree in conjunction with the tangential swinging of the sub-shift lever 16, and the high-speed shift arm 96 moves forward to perform high-speed switching. is now being carried out. In this case, the interlock piece 92 is stopped by the stopper 64, and the low-speed shift fork 99 is held fixed at the neutral position.

Further, as shown in FIG. 6, a PTO operating shaft 101 is rotatably fitted in the auxiliary transmission case 58 at the rear of the operating shaft 84, and a PTO shift lever puff end is attached to the left end of the PTO operating shaft 101. is installed in one piece, and the PTO
The PTO shift fork 103 is integrally fitted to the right end of the operation shaft 101, and the PTO shift fork 103 can rotate freely around the PTO slide shaft 6 parallel to the slide shafts 62 and 63.
is fitted, the tip of the PTO shift fork 103 is engaged with the PTO shift tag N No. 49, the tip of the PTO shift arm 102 is engaged with the PTO shift fork 103, and the PTO shift lever is operated after puffing. When the PTO shift arm 102 is moved back and forth, the PTO
The O-shift fork 103 slides back and forth to perform PTO gear change.

In the embodiment shown in FIGS. 1 to 9, when the main transmission lever 75 of the transmission mechanism 10 is operated along the main transmission guide 72, the main transmission 11 shifts to neutral, 1st gear, and 2nd gear. Speed,
It is operated to switch to either 3rd gear or reverse.

Thereafter, when the sub-shift lever 16 is set to the neutral position (3) of the inner high-speed shift guide 73a without applying any force to the sub-shift lever 76, the operating shaft shown in FIGS. 5 and 8 Due to the spring force of the compression coil spring 93 that is loosely fitted in the shaft 84, the operating shaft 84 is pushed to the left (rightward in the drawing), and the high-speed shift 1 hair arm 94 is moved into the engagement notch 9.
8, and the interlock piece 92 engages with the engagement notch 10.
0, and the sub-shift lever 7G is engaged with ii? When the I-shift gutter guide groove 73 is swung backwards within the high-speed shift guide 3a, the high-speed shift arm 94 is moved forward one step, and the high-speed shift fork 96 and the high-speed shifter gear 3 are moved forward.
7 moves forward, medium speed or? It can be switched to 3rd speed.

In this case, the tip of the low-speed shift arm 95 comes off the engagement notch 100 of the low-speed shift fork 99, and the stopper 64
Since the interlock piece 92 that is fixed by engages with the engagement notch 100, the low-speed shift fork 99 is fixed, and the low-speed shifter gear 43 is fixed at the neutral position and does not move.

In addition, without applying force to the sub-shift lever 76, the sub-shift lever 76
When force is applied outward to the sub-transmission lever 76 while the inner high-speed shift guide groove 73a is set at the neutral position ■, the sub-transmission lever 16 moves along the select position 73c of the sub-transmission guide 73. At the same time, the operating shaft 84 overcomes the spring force of the compression coil spring 93 and tilts outward.
is pushed to the right (to the left in the drawing), the tip of the interlock piece 92 is disengaged from the engagement notch 100, and the tip of the low-speed shift arm 95 is engaged with the engagement notch 100, and the sub-shift lever 76 is shifted to the low speed. It becomes possible to move back and forth within the shift guide 73b, and when the sub-shift lever 76 is swung back and forth within the low-speed shift guide W473b of the 11 transmission guide 73, the low-speed shift arm 95 swings backward or forward. The low-speed shift fork 99 and the low-speed shifter 43 move in the (p direction or forward) and are switched to low speed or very low speed. In this case, the tip of the interlock piece 91 fixed by the stopper 64 High-speed shift fork 9G slide relief fully engaged 1/
Since it is engaged with the J notch 98 and the tip of the high speed shift arm 94 is removed outward from the engagement notch 98, the high speed shift fork 96 is fixed and the high speed shifter R17 is fixed in the neutral position and moved. There's nothing to do.

Then, move the sub-shift lever 76 to 621 and the transmission guide 73.
Back and forth within the low speed shift guide groove 73b! ! Yu moved,
When returned to the neutral position (■), the operating shaft 84 returns to the left (to the right in the drawing) by the spring force of the compression Nicoil spring 93 loosely fitted to the operating shaft 84, and the 1171 shift lever 76 tilts inward. The tip of the interlock piece 91 enters the slide escape groove 97 of the high-speed shifter 1 to 4-9G, and the tip of the high-speed shift arm 94 enters the engagement notch 9.
8 and the tip of the interlock piece 92 shifts at low speed]
- While engaging with the engagement notch 100 of the fork 99, the low-speed shift arm 95 is disengaged from the engagement notch 100, allowing high-speed switching operation.

Move the PTO gear shift lever to 8 and move 71 forward and backward from the neutral position.
When it is turned on, PTO operation 1 and 101 are reversed,
The PTO shift arm 102 is moved tangentially or by gravity, and when it is engaged with the tip of the PTO shift arm 102, the PTO shift fork 103 and the PTO shift tag r engaged with the tip of the PTO shift fork 103 are moved.
49 moves backward or in the +iff direction, and the rear Pro shaft 31 is switched to 1st, 2nd, or 3rd speed.

In this way, the main transmission guide tM72 and the 01 shift lever 76 are sequentially operated to shift the main transmission 11 and the DI shift lever 76.
If the gear ratio with 2 is selected appropriately, it is possible to set the gear ratio of 12 (3×4) and move the tractor 1 forward.
Moreover, even when reversing, the tractor 1 can be moved backward using four different speed ratios.

In addition, each main gear shift lever 75. Sub-shift lever 76, PTO
The gear shift levers 77 are respectively connected to the main transmission 11. Sub-shift 1fi
Provided in one-to-one correspondence with the 12° PTO transmission 13,
Each main shift lever 75. The main transmission 11. Sub-transmission 12
．． Since the PTO transmission 13 is switched, the transmission 10
Furthermore, the structure of the transmission mechanism 70 is simplified, which enables cost reduction, and makes adjustments during assembly and maintenance and inspection after assembly extremely easy.

Furthermore, in the transmission mechanism of the auxiliary transmission 12, the auxiliary transmission lever 76
When the stopper 64. is tilted inward or outward, the stopper 64. The interlock piece 92 or interlock piece 91 held between the stopper 65 engages with the engagement notch 100 of the low-speed shift fork 99 or the engagement notch 98 of the high-speed shift fork 96, and the low-speed shift fork 99 or the high-speed shift fork 96 is activated. Because the vehicle is stopped, move the sub-shift lever 76 forward and backward by 1! When performing a dynamic operation, the simultaneous switching operation of the low speed shifter gear 43 or the high speed shifter gear 37 due to the movement of the low speed shift fork 99 or the high speed shift fork 9G is prevented, and the switching operation of only the high speed shifter gear 37 or the low speed shift gear 43 is reliably performed. .

Furthermore, since the elongated hole 79 is formed in the bracket 18, the deviation in the relative widthwise positional relationship between the n1 Mitsushicon case 58 and the operation plate 71 can be corrected by adjusting the bracket 79 along the elongated hole 19.
By moving 8 from side to side, the adjustment can be made very easily.

Moreover, s3r and i of the PTO shift lever 17 are fixed to the left end (right end in the drawing) of the PTO operating shaft 101,
A PTO shift 7-arm 102 is integrally fitted to the right end of the O operation shaft 101, and the tips of the PTO shift 1 to arm 102 are connected to the PTO shift 7-arm 102.
Since it is engaged with the TO shift fork 103, the PT
The O-speed transmission mechanism does not rely on the conventional link rod mechanism, but is a very simple mechanism with a small number of parts and easy adjustment and
Easy to maintain and inspect.

In the embodiment, the sub-transmission guide groove 73 and the PT
The outer arrangement of the O-speed transmission guide 74 may be reversed.

In addition, the inner and outer arrangement of the high-speed shift guide groove 73a and the low-speed shift guide 73b in the sub-transmission guide 73 is reversed, and the superior wheel drive ff*28. High speed shifter 37. Interlock piece 91. High speed shift arm 9
4 and high-speed shift fork 96, intermediate shaft 29, and low-speed shifter gear 43. Interlock piece 92. The low speed shift arm 95 and low speed shift fork 99 may be reversed.

According to the present invention, by rocking the gear shift lever back and forth or tilting it left and right, the required shift operation or selection operation can be performed, so that the shift change is performed. It can be carried out easily and reliably.

Furthermore, in the present invention, since the operating shaft for performing the required shift operation and selection operation is oriented toward the center of the vehicle body, even if the shift shaft is oriented in the longitudinal direction, the operating shaft Since the connection position of the gear shift lever can be shifted from the center in the middle rest 11] direction to either the left or right,
Even if the driver's seat is located in the center of the vehicle, you can easily change gears.

Furthermore, in the present invention, by changing the mounting position of the bracket to the transmission casing, it is possible to prevent a shift in the connection position of the transmission lever with respect to the operation shaft, and to prevent the shift arm from being attached to the operation shaft ('J LJ +'). j; The difference can be adjusted.

Furthermore, in the present invention, the operating shaft, the bracket,
Since the lever pivot member, gear shift lever, connecting piece, shift arm, and τ constitute the transmission of the tooth span type transmission (I-), the structure has been greatly simplified, and as a result, assembly, maintenance, and inspection have been simplified. can be easily carried out, and a large cost reduction can be achieved.

4. Simplified filling of the drawings
4 is a vertical sectional view of the auxiliary transmission of the embodiment, FIG. 5 is a cross-sectional front view of the N1 transmission, and FIG. 6 is an enlarged view of the main parts thereof. FIG. 7 is a left side view, FIG. 7 is a perspective view thereof, FIG. 8 is a perspective view of essential parts of the transmission line groove of the sub-transmission, and FIG. 9 is an exploded perspective view thereof.

1... (Shifter, 2... Vehicle body, 3... Engine, 4... Power transmission shaft, 5... Front width wheel, 6... Rear wheel, 7... Driver seat, 8...Rear rear engine, 9...
・Fuel tank, 10...Transmission, 11...1 shift 3!
1, 12... Sub-transmission, 13... PTO transmission,
14...Input shaft, 15...21st TIl! , 16・
...Third axis, 17...Fourth axis, 18...Gear pair, 1
9... Main clutch, 20, 21.22... Gear pair with hydraulic clamp, 23... Reverse gear/hydraulic clutch (-1=4j r pair, 24... One-way clutch,
25...PTO input hair = Y, 26...Idragia A
7.27...Gear with hydraulic clutch, 28...Rear wheel drive 8@, 29...Intermediate shaft, 30...Front wheel drive shaft, 31
... Rear PTO shaft, 32 ... PTO intermediate shaft, 33.
...Medium speed drive gear V134...Intermediate shaft drive gear, 35...High speed drive gear, 3G...Idler gear, 31...High speed shifter gear, 38...High speed driven gear, 39.40... Low speed driven gear, 41...
・Low speed idler gear, 42...Front wheel idler gear, 4
3...Low speed shifter gear, 44...Driven gear, 3
4...Idler 11ya, 46...Intermittent shifter, 47
...Front wheel drive gear, 48...PTO drive gear, 49...PTO shifter 1! it, 50...
・PTO driven gear, 51.52.53...Intermediate gear, 54...Front PTO drive gear, 55...Front PTQ axis, 5G...Front P[0 driven gear, 57
...Shifter, 58...Submission case, 59.
... Support projection, 60 ... Female thread, 61 ... Operation bearing section, 62.63 ... Slide shaft, 64 ... Stopper 65 ... PTO slide shaft, 70 ... Speed change mechanism, 71... Operation plate, 72... Main transmission guide groove, 13... Sub-transmission guide groove, 1
4... Guide groove for PTO transmission, 75... Main shift lever, 76... Sub-shift lever, 77... PTO shift lever, 78... Bracket, 19... Long hole, 80
...Mounting with bolts, 81...Bearings, 82...
・Lever pivot material, 83... Pivot bolt, 84...
Operating shaft, 85... Connection piece, 86... Connection bolt, 8
7...Reduced by 19! Plate, 88... Connection bolt, 89...
・Nut, 90...Interlock connection material, 91.9
2... Interlock piece 93... Compression coil spring, 94... High speed shift arm, 95... Low speed shift arm, 96... High speed shift fork, 97...
・Slide relief groove, 98... Engagement notch, 99... Low speed shift lever, 100... Connection notch, 101...
・PTO operation axis, 102...PTO shift arm, 1
03...PTO shift i-fork.

No. figure Shigeru figure

Claims (1)

[Claims] In a vehicle equipped with a gear type transmission with a transmission shaft oriented in the longitudinal direction and a driver's seat above the transmission, the operating shaft can freely slide through the upper part of the transmission casing in the width direction of the vehicle body. a bracket is attached to the transmission casing adjacent to the operating shaft, a lever pivot support member is provided on the bracket to be rotatable about the axis of the operating shaft, A speed change lever is pivotally attached to the lever pivot member so as to be tiltable in a front-rear direction perpendicular to the axis of the operating shaft, a connecting piece is fixed to the operating shaft, and a lower end of the speed changing lever is attached to the connecting piece. An operating mechanism for a gear type transmission for a vehicle, characterized in that a shift arm is engaged with the operating shaft and is integrally attached to the operating shaft.