JPS6214440Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a multi-speed transmission device equipped with a main transmission and an auxiliary transmission for switching between high and low gears, and in particular, a multi-speed transmission device that is equipped with a main transmission and an auxiliary transmission for switching between high and low gears. This invention relates to a so-called splitter type multi-speed transmission that is used by switching the engine between high and low speeds.

[Prior Art] In this type of multi-speed transmission, the gear ratio of the main transmission at a high gear ratio does not change much even when the auxiliary transmission is switched to a high or low gear. In such a case, there is no point in increasing the gears one after another as it would just be cumbersome to operate.

[Means for solving the problem] In order to achieve the above object, the configuration of the present invention includes a first electromagnetic switching valve for switching the auxiliary transmission to a high speed gear and a first electromagnetic switching valve for switching the auxiliary transmission to a low speed gear in the fluid pressure circuit of the actuator. A first switch that closes when the main transmission is in the highest gear is inserted into the energizing circuit of the first solenoid directional valve, and a first switch that closes when the main transmission is in the highest gear is inserted into the energizing circuit of the second solenoid directional valve. Insert a second switch that closes when the main transmission is in the gear following the highest gear, and a third switch that closes when the main transmission is in a gear other than the highest and the next gear. A series circuit with a high/low speed changeover switch of the transmission is connected in parallel with the first and second switches.

[Operation] Since the third switch 48 cancels the high/low gear shift switch 47 at a predetermined high gear shift or higher of the main transmission, the fluid in the actuator that drives the sub-transmission for high/low gear switching is reduced. Electromagnetic switching valves 45 and 46 that control the pressure circuit operate the sub-transmission only in one of the low gear and the high gear.

Therefore, the unnecessary operation of switching the auxiliary transmission from a low gear to a high gear or from a high gear to a low gear at a high gear of the main transmission is eliminated, and the durable life of the auxiliary transmission is extended. .

In the embodiment, the first switch has a contact piece 49b and a second switch.
The switch is also defined as contact piece 50b.

[Embodiment of the invention] The invention will be explained based on an embodiment of a 10-speed transmission. As shown in FIG. 1, in the multi-stage transmission, a main transmission 18 and a sub-transmission 19 are separated by an intermediate wall 29 of a casing 26. The main transmission has an input shaft 31 rotatably coupled to a drive shaft (crankshaft) 30 of the engine via a clutch 34, and is rotatably supported on an end wall 27 of a casing 26.
A gear 4 is fixedly supported. A main shaft 32 is rotatably supported by the intermediate wall 29 of the casing 26 coaxially with the input shaft 31 . Gears 3, 2, 1, 66, and 10 are supported on the main shaft 32 so as to be freely rotatable independently of each other but cannot be moved in the axial direction, and known clutches 21, 22 are used to rotationally connect these gears to the main shaft 32. , 23 rotate together with the main shaft 32 and are supported so as to be movable in the axial direction. End wall 27
and a subshaft 33 is rotatably supported by the intermediate wall 29,
To this, gears 14, 13, 12, 63, 11, 17
is fixedly supported. The gear 14 always meshes with the drive gear 4 attached to the input shaft 31, and similarly, the gear 13 meshes with the gear 3, the gear 12 meshes with the gear 2, and the gear 1.
1 is always meshed with gear 1, gear 17 is always meshed with gear 10, and gear 63 is always meshed with intermediate gear 61 for reverse movement. The intermediate gear 65 is supported by the casing 26 with a shaft 64 and is rotationally connected to the gear 61 via a boss 62, and the intermediate gear 65 meshes with the gear 66.

The clutch 21 has a bifurcated lower end and a main shaft 32.
The shift rod 7 connecting the shift arm 7a is connected to the main shaft 32.
By shifting parallel to , ie to the left or right, the gear 4 or 3 can be rotationally connected to the main shaft 32 . Similarly, clutch 22 is connected to shift arm 8a extending from shift rod 8, and clutch 23 is connected to shift arm 9a extending from shift rod 9.

Each of the shift rods 7, 8, and 9 is supported by the housing 26 in parallel with the main shaft 32 and substantially horizontally, but for convenience of explanation, these are shown in perspective. And each shift rod 7, 8,
9 is provided with a shift block, which in principle swings (selects) the gear shift lever 57, which is swingably supported by a spherical bearing 58 on the vehicle body side, in the direction of arrow x, so that the lower end of the gear shift lever 57 is The shift lever 57 is then swung (shifted) in the direction of the arrow y, and the shift rod engaged with the shift block is moved in the axial direction. Clutch 21,2
2 and 23 are connected to obtain a predetermined gear position in the main transmission 18.

The sub-transmission 19 has a gear 6 fixedly supported on the main shaft 32.
and a gear 5 which is rotatably supported on the output shaft 41 and not moved in the axial direction, and the output shaft 41 is rotatably supported by the end wall 28. Gears 16 and 15 that mesh with gears 6 and 5, respectively, are connected to each other at a boss portion 25 and rotatably supported by a subshaft 42. The countershaft 42 is supported by the intermediate wall 29 and the end wall 28.

A clutch 24 is provided for rotationally coupling the output shaft 41 with the gear 6 or gear 5 of the main shaft 32, which is actuated by the rod 20 connected to the piston 38 of the hydraulic actuator 39. The fluid pressure actuator 39 has a pair of fluid working chambers partitioned by a piston 38, one of which is equipped with an electromagnetic switching valve (an electromagnetic three-way valve in the case of compressed air) 4.
Pressure fluid is supplied from a fluid pressure source 40 via 6 or 45. When the electromagnetic switching valve 46 is energized,
Pressure fluid instantly enters the left chamber of the fluid pressure actuator 39, and the piston 38 moves to the rightmost side,
When the shift is completed and power is cut off, the left chamber is cut off from the fluid pressure source 40 and opened to the atmosphere. Once engaged, the clutch 24 is adapted to remain engaged without the need for external force.
Similarly, when the electromagnetic switching valve 45 is energized, pressure fluid instantly enters the right chamber of the fluid pressure actuator 39, the piston 38 moves to the leftmost position, and when the shift is completed and the energization is cut off, the right side chamber is opened to the atmosphere. Each electromagnetic changeover valve 46, 45 is energized by a high/low speed changeover switch 47 which is disposed on a speed change lever 57 or the like and which is normally returned to a neutral position.

FIG. 2 shows a control circuit for the electromagnetic switching valves 46 and 45, which includes a fuse 36 between the positive conductor 71 and the negative conductor 72, and a switch that closes when the aforementioned clutch 34 is disengaged and opens when the clutch 34 is engaged. 4
3. Solenoid switching valve 45 and switch 49 contact piece 4
9b are connected in series. Similarly, a fuse 37 and a clutch 34 are connected between the positive conductor 71 and the negative conductor 72.
The switch 44, which opens and closes in the same manner as the switch 43, the electromagnetic switching valve 46, and the contact piece 50b of the switch 50 are connected in series. A series circuit consisting of a high/low speed changeover switch 47 and a switch 48 is connected in parallel with each contact piece 49b, 50b.

The switch 48 closes the circuit when the shift block of shift rod 9 or shift rod 8 is selected in the select operation (direction of arrow x) of the shift lever 57, but opens when the shift block of shift rod 7 (for 4th-5th speed) is selected. The switch 49 has interlocking contact pieces 49a and 49b, and when the shift lever 57 shifts the shift rod 7 to the left, that is, to the highest speed, the contact piece 49
b closes the circuit, and contact piece 49a opens the circuit. The switch 50 has interlocking contact pieces 50a and 50b. When the shift lever 57 shifts the shift rod 7 to the right, that is, to the next gear after the highest speed, the contact piece 50b closes the circuit, and the contact piece 50a closes the circuit. Open the circuit.

To prevent noise caused by high-speed, high-load operation,
The nozzle reductor 51, the contact piece 50a of the switch 50, and the contact piece 49a of the switch 49 are connected in series between the positive conducting wire 71 and the negative conducting wire 72. This nozzle reductor 51 is also connected to a negative conducting wire 72 via a contact piece 52a of a relay switch 52. Further, a changeover switch 47a and a pilot lamp 55 are connected in series between the positive conductor 71 and the negative conductor 72, and the switch 47a closes the circuit when the piston 38 of the fluid pressure actuator 39 is at the rightmost position.
Switch 47b that closes the circuit when 8 is on the leftmost side
and a pilot lamp 56 are connected in series. The connection point between the switch 47a and the pilot lamp 55 is connected to the connection point between the electromagnetic switching valve 46 and the contact piece 50b of the switch 50 via the relay coil 52b of the relay switch 52 and the diode 59.

As shown in FIG. 5, the noise reducer 51 constitutes the electromagnetic coil of the electromagnetic switching valve 75, and when it is energized, it is in the state shown in the figure, and when the energization is cut off, the noise reducer 51 is in the state shown on the left side of the fluid pressure actuator 77. The chamber is isolated from the fluid pressure source 76 and opened to the atmosphere. At this time, the piston 80 of the fluid pressure actuator 77 is pushed to the left by the force of the spring 79, and the stop lever 82 connected to the rod 81
is rotated counterclockwise about the support shaft 83 as shown by the broken line, thereby limiting the amount of movement of the fuel control rack 85 in the fuel injection device 84 in the fuel increasing direction.

Next, the operation of the device of the present invention will be explained. First, when starting the vehicle, disengage the clutch 34, connect the high/low gear changeover switch 47 to the low speed side, that is, contact L (Fig. 2), and then select the shift lever 57 to the shift block of the shift rod 9. , shift the shift rod 9 to the right. In this case, the switch 48 is closed in FIG.
Electromagnetic switching valve 46, high/low speed switching switch 47,
The switch 48 is energized. Therefore, pressure fluid is applied from the fluid pressure source 40 to the left chamber of the fluid pressure actuator 39 via the electromagnetic switching valve 46,
Piston 38 moves to the right and gear 5 is rotationally coupled to output shaft 41 by clutch 24 . Also,
The clutch 23 is moved to the right via the shift arm 9a of the shift rod 9, and the gear 10 is rotationally connected to the main shaft 32.

When the clutch 34 is engaged, the rotation of the drive shaft 30 is as follows: clutch 34, input shaft 31, gears 4, 14, subshaft 33, gears 17, 10, main shaft 32, gears 6, 1.
6, 15, 5 to the output shaft 41, and the first
The vehicle is started at high speed. At this time, in FIG. 2, from the power supply 35 to the fuse 37, the noise reducer 5
1. Electricity is applied to the contact piece 50a and the contact piece 49a. In addition, in FIG. 5, the pressure fluid from the fluid pressure source 76 enters the left chamber of the fluid pressure actuator 77 via the electromagnetic switching valve 75, pushes the piston 80 against the spring 79, and moves the stop lever 82 clockwise. Since the fuel injection device is rotated, the fuel control lever 85 of the fuel injection device can be moved sufficiently in the fuel increasing direction in accordance with the operating amount of the accelerator pedal without being restricted.
Further, the switch 47a is closed in conjunction with the fluid pressure actuator 39, and the pilot lamp 55 is lit to indicate that the sub-transmission is connected to the low gear.

When shifting to the second speed, it is only necessary to disengage the clutch 34 and switch the high/low speed changeover switch 47 to contact H. From power supply 35 to fuse 36,
The switch 43, the electromagnetic switching valve 45, the high/low speed switching switch 47, and the switch 48 are energized, and pressure fluid enters the right chamber of the fluid pressure actuator 39 from the fluid pressure source 40 via the electromagnetic switching valve 45, and the piston 38 moves to the left, and the output shaft 41 is rotationally coupled to the gear 6 by the clutch 24. Therefore, the rotation of the input shaft 31 is caused by the gears 4, 14 and the subshaft 3.
3. It is directly transmitted to the output shaft 41 via the gears 17 and 10 and the main shaft 32. At the same time, the switch 47b is closed and the high speed stage pilot lamp 56 is lit.

To shift to the third gear, the clutch 34 is disengaged, the high/low gear changeover switch 47 is switched to the contact point L, the gear change lever 57 is selected as the shift block of the shift rod 8, and the shift rod 8 is shifted to the right. Since the switch 48 is in the closed state, the gear 5 is rotationally coupled to the output shaft 41 by the clutch 24 of the auxiliary transmission 19 as in the case of the first gear, and at the same time the switch 47a is closed and the pilot lamp 55 of the low gear is connected. lights up. In addition, the main transmission 1
The gear 1 is rotationally coupled to the main shaft 32 by means of a clutch 22 of 8. When the clutch 34 is engaged, the drive shaft 3
0 rotation is the input shaft 31, gears 4, 14, subshaft 3
3, gear 11, 1, main shaft 32, gear 6, 16, 1
5, 5 and is transmitted to the output shaft 41.

When shifting to the fourth speed, it is sufficient to disengage the clutch 34 and switch the high/low gear changeover switch 47 to the contact point H. Since the switch 48 is in the closed state, the output shaft 41 is rotationally coupled to the gear 6 of the main shaft 32 by the clutch 24 of the auxiliary transmission 19 as in the case of the second gear, and at the same time the switch 47b is closed and the pilot in the high gear is connected. The lamp 56 lights up.
The rotation of the input shaft 31 is directly transmitted to the output shaft 41 via the gears 4 and 14, the subshaft 33, the gears 11 and 1, and the main shaft 32.

To shift to the fifth gear, the clutch 34 is disengaged, the high/low gear changeover switch 47 is switched to the contact point L, the gear change lever 57 is selected as the shift block of the shift rod 8, and the shift rod 8 is shifted to the left. Since the switch 48 is in the closed state, the gear 5 is rotationally coupled to the output shaft 41 by the clutch 24 of the auxiliary transmission 19 as in the case of the first gear, and at the same time the switch 47a is closed and the pilot lamp 55 of the low gear is turned on. Turn on the light. In addition, the main transmission 1
The gear 2 is rotationally connected to the main shaft 32 by a clutch 22 of 8 . When the clutch 34 is engaged, the drive shaft 3
0 rotation is the input shaft 31, gears 4, 14, subshaft 3
3, gears 12, 2, main shaft 32, gears 6, 16, 1
5, 5 and is transmitted to the output shaft 41.

When shifting to the sixth speed, it is sufficient to disengage the clutch 34 and switch the high/low gear changeover switch 47 to contact H. Since the switch 48 is in the closed state, the output shaft 41 is rotationally coupled to the gear 6 of the main shaft 32 by the clutch 24 of the auxiliary transmission 19 as in the case of the second gear, and at the same time the switch 47b is closed and the pilot in the high gear is connected. The lamp 56 lights up.
The rotation of the input shaft 31 is directly transmitted to the output shaft 41 via the gears 4 and 14, the subshaft 33, the gears 12 and 2, and the main shaft 32.

Next, when shifting to 7th gear, clutch 3
4, select the shift lever 57 to the shift block of the shift rod 7, and shift the shift rod 7 to the right. In this case, as shown in FIG.
8 is opened, and the contact piece 50b of the switch 50 is closed by the shift operation of the gear change lever 57, and the contact piece 50a is closed.
opens. From power supply 35 to fuse 37, switch 4
4, the electromagnetic switching valve 46 and the contact piece 50b are energized,
Regardless of the operating position of the high/low speed selector switch 47, the electromagnetic selector valve 46 will be energized.
The auxiliary transmission 19 is connected to the low speed gear. Further, as the shift lever 57 is operated, the gear 3 is rotationally connected to the main shaft 32 by the clutch 21 of the main transmission 18 . When the clutch 34 is engaged, the rotation of the drive shaft 30 is as follows: input shaft 31, gears 4, 14, subshaft 33, gears 13, 3, main shaft 32, gears 6, 16, 15, 5.
The signal is transmitted to the output shaft 41 via.

In the seventh speed, power is applied from the power source 35 to the switch 47a, relay coil 52b, diode 59, and contact piece 50b, and the contact piece 52a closes, so that the power source 35
Electricity is applied to the noise reducer 51 and the contact piece 52a of the relay switch, and the movement of the fuel control lever 85 of the fuel injection device 84 is not restricted as in the first to sixth speeds.

From the state of 7th gear (a combination of 4th gear of the main transmission and low gear of the auxiliary transmission), the high/low gear changeover switch 47
Even if you try to connect to the 8th gear (a combination of 4th gear of the main transmission and high speed of the auxiliary transmission) by operating the No connection is achieved.

Next, when shifting to the highest speed (10th speed), it is sufficient to disengage the clutch 34 and shift the shift rod 7 to the left using the gear change lever 57, and at this time the switches 49 and 50 are switched. That is, as shown in FIG. 4, the contact piece 49a of the switch 49 opens, the contact piece 49b closes, and the contact piece 5 of the switch 50 opens.
0a is closed and contact piece 50b is opened. Power is applied from the power source 35 to the fuse 36, switch 43, electromagnetic switching valve 45, and contact piece 49b, and the sub-transmission 19 is switched to the high speed gear. Further, as the gear shift lever 57 is shifted, the main shaft 32 is directly connected to the input shaft 31 by the clutch 21 of the main transmission 18, so when the clutch 34 is engaged, the rotation of the drive shaft 30 is changed to the input shaft 31.
1. Transmitted to the main shaft 32 and output shaft 41.

Here, even if the high/low speed changeover switch 47 is operated, the switch 48 and contact piece 50b remain open, so the electromagnetic changeover valve 46 is not operated, and therefore the sub-transmission 19 is shifted to the low speed. The gear is not shifted to the 9th gear and the gear is not shifted to the 9th gear.

In the 10th speed, the relay coil 52b is demagnetized and the contact piece 49a is opened, so the noise reducer 51 is not energized and the stop lever 82 is in the state shown by the broken line in FIG. 5, and the fuel control rack of the fuel injection device is closed. Movement of the rod 85 in the fuel increasing direction (to the left) is restricted, restricting high-speed, high-load operation, and suppressing an increase in noise.

[Effects of the Invention] As explained above, the present invention provides a multi-stage transmission that includes a first electromagnetic switching valve for switching the auxiliary transmission to a high gear and a second electromagnetic switching valve for switching the auxiliary transmission to a low gear in the fluid pressure circuit of the actuator. A first switch that closes when the main transmission is in the highest gear is inserted into the energizing circuit of the first solenoid directional valve, and a first switch that closes when the main transmission is in the highest gear is inserted into the energizing circuit of the second solenoid directional valve. A second switch is inserted that closes when the main transmission is in a gear following the highest gear, and a third switch is inserted that closes when the main transmission is in a gear other than the highest gear and the gear following the highest gear. Since the series circuit with the high/low gear shift switch is connected in parallel with the first and second switches, this configuration allows the gear lever to select gears other than the highest gear and the next gear. The third switch is closed for operation, and although the high/low gear changeover switch switches the auxiliary transmission between low and high gears, it does not respond to the gear shift lever's shift operation to the highest gear. In this case, the auxiliary transmission automatically shifts only to the high gear regardless of the position of the high/low gear selector switch, and the auxiliary transmission automatically shifts only to the low gear when the shift lever is shifted to the next gear after the highest gear. The combination of a 5-speed main transmission and a 2-speed auxiliary transmission will result in a 10-speed transmission.
In the case of a transmission, such as a multi-speed transmission, where the gear ratio does not change much even if the auxiliary transmission is switched between a low gear and a high gear when the main transmission is in a high gear,
It is possible to connect from 7th gear to 10th gear without having to switch between high and low gears, allowing efficient gear shifting operation with no waste.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a schematic configuration of a multi-speed transmission according to the present invention, Fig. 2 is a control circuit diagram showing the operating state of the multi-speed transmission at the first gear, and Fig. 3 is a control circuit diagram showing the operating state of the multi-speed transmission at the first gear. FIG. 4 is a control circuit diagram showing the operating state at the next gear, FIG. 4 is a control circuit diagram showing the operating state at the highest speed of the device, and FIG. 5 is a schematic diagram of the noise reducer. 1-6, 10-17... Gear, 18... Main transmission, 19... Sub-transmission, 21-24... Clutch, 31... Input shaft, 32... Main shaft, 39... Actuator, 33, 42... Subshaft, 41... Output shaft, 45, 46... Solenoid switching valve, 47... High
Low speed gear changeover switch, 48...third switch,
49b, 50b...first, second switch, 4
9,50...Switch, 57...Shift lever.

Claims (1)

[Scope of utility model registration request] A first electromagnetic switching valve for switching the auxiliary transmission to a high speed gear and a second electromagnetic switching valve for switching the auxiliary transmission to a low gear are provided in the fluid pressure circuit of the actuator. A first switch that closes when the transmission is in the highest gear is inserted, and a second switch that closes when the main transmission is in the gear following the highest gear is inserted in the energizing circuit of the second electromagnetic switching valve. , a series circuit between a third switch, which is closed when the main transmission is in a gear other than the highest gear and the next gear, and a high/low gear changeover switch of the sub-transmission, is connected to the first and second switches. A multi-stage transmission device connected in parallel.