JPS61265611A - Speed change operating device for transmission mechanism - Google Patents

Abstract

PURPOSE:To execute a speed change and a forward/backward rotation switching by one piece of operating lever by combining a guide having vertical and horizontal groove parts and an operating link for turning in a same direction. CONSTITUTION:When the operating lever 19 is made to cross the horizontal groove part 20 of a guide 23 and tilted forward and backward in the respective vertical groove parts 21, 22, the lever itself turns forward and backward and to the right and left, and also the operating link 25 is turned to the right and the left directions. As a result, the respective operating pieces 31, 32 of a speed change mechanism and a forward/backward switching mechanism are operated suitably. In this case, as the operating lever 19 goes toward the front and the rear ends of the respective vertical groove parts 21, 22, the operating link 25 increases the rotational angle of the same direction, therefore, the output revolv ing speed of the speed change mechanism becomes high by its portion, and the forward/backward position of the operating lever 19 and the output revolv ing speed correspond to each other exactly.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention provides at least a transmission mechanism that can obtain an output rotation speed corresponding to the amount of movement of an operator, and a transmission mechanism that can rotate in forward and reverse directions by moving the operator a certain distance. The present invention relates to a speed change operation device for a transmission mechanism that is equipped with a forward/reverse switching mechanism that provides the following.

Such transmission mechanisms are used in a wide variety of applications such as transmissions of various machines and vehicles.

(b) Conventional technology The most common speed change operation device for a transmission mechanism is one that uses selective meshing of gears, and the appropriate operation of an operator linked to an external operation means such as an operation lever. The purpose of this is to change this engagement.

Further, when a large number of gears is required, a plurality of sets of selective meshing are provided.

Each one was switched using a dedicated control lever or the like.

(c) Problems to be solved by the invention By the way, in such a case, the gear shifting operation becomes complicated, so in order to simplify this, we have made it possible to switch between each set with a single operating lever. Various so-called 1 mole one-way systems have been considered, and many have been proposed in the past.

For example, Japanese Utility Model Publication No. 59-21320 is one such example, but these are merely devices that enable sliding switching of a plurality of gears using a single operating lever.

On the other hand, in recent years, as specifications have become more sophisticated, there has been a demand for gears that can provide a large number of gears within a limited space. The most important example of this is a continuously variable transmission, which is incorporated into the transmission path.

By the way, normally, the output rotation speed of these continuously variable transmissions corresponds to the amount of movement of the operator.

If you operate this operator appropriately using the operating lever etc.,
Speed changes can be achieved steplessly.

However, this is fine if the output rotation is only in one direction, but
If reverse rotation is also required, a separate control lever, etc. is required to operate the forward/reverse switching mechanism (in most cases, a structure is adopted in which a gear slides to change the mating gear it engages with). Te(ru)

That is, FIG. 5 is an explanatory diagram showing a cross section of the Mitsushiron case of a traveling working machine, which is an example of 1:. , continuously variable transmission), and the forward/reverse switching mechanism 3. Power is transmitted via a pair of side clutch brake mechanisms 4 to drive wheels 5, which are the final output mechanism.

FIG. 6 is a plan view of the external operation means for controlling this, and on the operation panel 6, a lever 7 for height operation and a lever 8 for forward/reverse switching for controlling the transmission mechanism 2 are provided separately. Each had to be operated independently.

However, it is clear that this is complicated and troublesome, and it is easy to imagine that this may lead to operational errors.

Furthermore, in this case, if the forward/reverse switching lever 8 is switched at a certain forward speed, the vehicle will move backward at that speed, which is dangerous.

(d) Means for Solving the Problems Therefore, the present invention provides at least a transmission mechanism that can obtain an output rotation speed corresponding to the amount of movement of the operator, and a transmission mechanism that can obtain forward and reverse rotation by moving the operator a certain distance. In the transmission groove equipped with a forward/reverse switching mechanism, there is a lateral groove in the center, and
A guide is provided in which vertical grooves extending forward and backward are communicated from one end of each of the horizontal grooves, and the guide guide guides one operating lever.

In addition to pushing this operating lever through an operating groove of an operating link that is formed so that the rotation angle in the same direction increases as the operating lever moves toward the front and rear ends of each longitudinal groove of the guide,
Similarly, this operating lever is equipped with an operating lever that rotates in forward and reverse directions when the operating lever crosses the IItl groove portion of the guide guide, and the operation lever rotates the operating link and moves the operator of the transmission mechanism. Furthermore, the above-mentioned problems are solved by interlocking the rotation of the operating lever and the movement of the operator of the forward/reverse switching mechanism.

(E) Function By taking such a means, if one operating lever is moved across the horizontal grooves of the guide and tilted forward and backward in each vertical groove, the lever itself will rotate in the front, back, left and right directions. 9
Since the operating link is rotated in the left-right direction, the respective operators of the transmission mechanism and the forward/reverse switching mechanism can be operated as appropriate. In this case, the operating lever moves to the front and rear ends of each longitudinal groove of the guide (the operating link increases the rotation angle in the same direction, so the output rotation speed of the transmission mechanism increases accordingly). This allows the front and back position of the bar to correspond accurately to the output rotation speed.

(F) Embodiments Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

This invention requires the existence of a transmission mechanism that combines the transmission tiz and the forward/reverse switching mechanism 3.

First, the transmission mechanism 2 may have any structure, but its output rotational speed must correspond to the amount of movement of the operator controlling it. .

4th FI! J is a sectional view showing one example, and this transmission mechanism 2 constitutes a continuously variable transmission.

That is, this continuously variable transmission 2 includes an input disk 10 that is integrated with an input shaft 9 and an output disk 12 that is coupled to an output shaft 11.
The principle is a differential floating X mechanism that uses frictional force and has several planetary cones 13 arranged in between. and,
A ring 14 also in frictional contact with the outer periphery of the planetary cone 13
By providing these, the planetary cone 13 comes into contact with these three points, so a differential relationship is created here and speed change becomes possible. Therefore, by changing the position of the ring 14 in contact with the planetary cone 13, this differential state changes and the gear ratio changes. In addition, in FIG. 4, the output shaft 11 becomes faster by moving the ring 14 to the right.
Moving it to the left will slow it down.

On the other hand, regarding the forward/reverse switching mechanism 3, as mentioned above, one slide gear 15 is connected to a certain transmission shaft 16.
Make sure you can slide the top.

It may be a gear that can be selectively engaged with the adjacent gear 17 or the counter gear 18.

Thereby, by moving the slide gear 15 a certain distance, forward and reverse rotation can be obtained.

FIG. 1 is a perspective view of the speed change operating device of this transmission mechanism. First, one operating lever 19 is provided, and the lateral groove 20 is attached to the center of the operating lever 19. Furthermore, guidance is provided by a guide 23 in which longitudinal grooves 21 and 22 are formed that communicate with one end of each of the horizontal grooves 20 and extend forward and backward.

In addition to this, the operating lever 19 also passes through an operating groove 26 formed in an operating link 25 that rotates left and right around a support rotation shaft 24 that is pivoted in the front-rear direction. The operating groove 26 has a rotation angle in the same direction (clockwise in this example) centering on the support rotation shaft 24 as the operating lever 19 moves toward the front and rear ends of the longitudinal groove portions 21 and 22 of the guide guide 23. It is designed to increase the Note that a lever 27 that synchronizes with this rotation is fixed to one end of the support rotation shaft 24.

The lower end of the operating lever 19 must be able to swing back and forth and left and right beyond 9 degrees, so it must be inserted into the block 28 so that it can be freely rotated back and forth (and this block 28 can be rotated in the front and back directions). Support shaft 2 installed on
If the block 28 is supported so as to be rotatable left and right by the block 9, and the operating lever 30 is mounted on the block 28, the operating lever 19 crosses the horizontal groove 20 of the guide 23.

It will rotate in both the left and right directions.

Next, the lever 27 described above is moved to the ring gear 4 of the transmission mechanism 2.
The operation lever 30 is linked to the operation lever 32, which is a shifter that moves the slide gear 15 of the forward/reverse switching mechanism 3, as shown below. It is configured.

In other words, by rotating the levers 33, 34 provided near 8 in both the single-car operation elements 31, 32, they can be moved to the left and right in conjunction with the bins 35, 36 provided therein, and these levers 33.34 and lever 2
71 operating lever 30 is connected by connecting means 37 and 38 such as rods.

FIG. 2 is a sectional view of this speed change operating device.

The present invention operates as follows by adopting one or more configurations.

Now, if the operating lever 19 is in the horizontal groove 20 in the center of the guide 23, the operating link 250 and the operating groove 26 are also in the corresponding position, and the operating link 25 hardly rotates. The operator 31 remains rotated in one direction, so to speak, on the low speed side. However, when the operating lever 19
1, the 1 operation link 25 is rotated to one side by the action of the operation groove 26, and the lever 3 is rotated through the connecting means 37.
3 to move the operator 31 to the high speed side.

The amount of movement of the operator 31 at this time becomes larger as the operation lever 19 moves further forward of the vertical groove portion 21.

Furthermore, when the operating lever 19 is moved to another vertical groove 22 of the guide 23, the operating lever 31 is
Similarly, move to the high speed side.

Therefore, the shape of the working groove 26 of the one-operation link 25 is such that a horizontal groove is provided in the center thereof, and sloped portions are formed that extend diagonally in a predetermined direction from both ends thereof so as to follow the above-mentioned operation.

On the other hand, when the operating lever 19 is moved to either of the two longitudinal grooves 21 and 22 of the guide 23 described above.

Since the operating link 25 also rotates within a certain range in forward and reverse directions, the operator 32 of the forward/reverse switching mechanism 3 is moved to switch between forward and reverse directions via the connecting means 38.

By the way, if the operating lever 19 is in one of the longitudinal grooves 21 of the guide 23, the output will be forward rotation (forward if it is a transmission mechanism for a traveling work machine, etc.), and if it is in the other longitudinal groove 22, the output will be reverse rotation. (Similarly, this means that the vehicle is moving backward), but if the length of the other vertical groove portion 22 is made shorter than the length of one longitudinal groove portion 21, the high speed range in the case of backward movement can be limited. Furthermore, by forming the lateral groove portion 20 of the guide 23 slightly diagonally rather than in the right and left direction, it is possible to change the speed slightly even in this portion, and the gear engagement of the slide gear 15 in the forward/reverse switching mechanism 3 is improved. It becomes smooth and the so-called 9. Clutch-free shifting is possible.

FIG. 3 is a plan view showing another embodiment of the guide 23 and the operating link 25, but h! By making the grooves 21, 22 horizontally in double rows in this way (and correspondingly also changing the working groove 26 of the working link 25 in this way).

A shift pattern different from the above-mentioned ■ type shift can be obtained.

(G) Effects of the Invention First, since the operating elements 31 and 32 of both the transmission mechanism 2 and the forward/reverse switching mechanism 3 can be operated with a single operation lever 19, it is possible to use a so-called 2-molar lever one-way type, which is easy to operate. be. In this case, if this speed change operating device is used in a traveling transmission mechanism of a traveling working machine, pushing the operating lever 19 forward moves forward, pushing it toward Uk moves backward, and the speed also changes between forward and backward. The further you go, the higher the speed becomes, which closely matches the feeling of piloting. Furthermore, as mentioned above, by providing the lateral groove portion 20 of the guide guide 23 that guides the operating lever 19 not completely horizontally but in an oblique direction with a slight longitudinal component, the transmission mechanism 2 FA
g! In other words, since the slide gear 15 of the forward/reverse switching mechanism 3 is rotated at a slow speed, the gear meshing with the mating gear etc. can be performed smoothly (
Therefore, situations such as redoing the engagement operation, noise, and damage caused by mutual phase mismatch do not occur.

Also, even when restricting the high speed range when reversing,
This can be easily achieved by shortening the length of the ht&groove portion 21 corresponding to the guide 230.

Furthermore, in a continuously variable transmission etc. as the transmission mechanism 2,
The amount of adjustment movement of the operator 31 from high speed to low speed is set to be very small. but.

Even in such a case, the operating amount of the operating lever 19 must be a certain amount in terms of operating feel, so a link mechanism was required in the middle to adjust this.
According to this invention, by increasing the rotation angle of the two-actuating link 250 in consideration of the shape of the working groove 26, etc. of the two-acting link 25, such a link mechanism is not necessary, and the structure can be simplified accordingly. It is.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the speed change operation device according to this invention, Fig. 2 is a cross-sectional view of the main parts, Fig. 3 is a plan view of another embodiment of the guide and the operating link, and Fig. 4 is the speed change mechanism. FIG. 5 is a cross-sectional view of a transmission case of a traveling working machine as a transmission mechanism, and FIG. 6 is a plan view of a conventional operating lever guide. (Symbol) 2...Transmission mechanism 3...Forward/reverse switching mechanism 19...Operation lever 20...Horizontal groove part 21...Vertical groove part 22... 〃 23...Guide guide 25...Operating link 26...Effective groove 30・・Operating lever 31・・Controller 32・・Patent applicant: Sayre Ie Gyo Co., Ltd. Agent: Yoshio Sakano, patent attorney Figure 2, Figure 3

Claims (1)

[Claims] At least a transmission mechanism (2) that provides an output rotation speed corresponding to the amount of movement of the operator (31), and a forward/reverse switching mechanism (2) that provides forward and reverse rotation by moving the operator (32) a certain distance. 3) In a transmission mechanism equipped with
20), furthermore, a longitudinal groove (21) communicating from one end of each of the horizontal grooves (20) and extending forward and backward.
, (22) is provided, and this guide guide (23) guides one operating lever (19), and this operating lever (19) It is inserted into the operating groove (26) of the operating link (25), which is formed so that the rotation angle in the same direction increases toward the front and rear ends of each of the longitudinal grooves (21) and (22) of the guide (23). In addition, this operation lever (19
), this operating lever (19) is connected to the guide guide (23
) is provided with an actuation lever (30) that rotates in forward and reverse directions by crossing the horizontal groove (20) of the actuation link (2).
5) and the movement of the operator (31) of the transmission mechanism (2), as well as the rotation of the operating lever (30) and the movement of the operator (32) of the forward/reverse switching mechanism (3). A speed change operating device for a transmission mechanism characterized in that the respective gears are interlocked.