WO2016204249A1

WO2016204249A1 - Shifting device

Info

Publication number: WO2016204249A1
Application number: PCT/JP2016/067999
Authority: WO
Inventors: 治彦山田
Original assignee: いすゞ自動車株式会社
Priority date: 2015-06-18
Filing date: 2016-06-16
Publication date: 2016-12-22
Also published as: JP6544072B2; CN107709846A; CN107709846B; JP2017008986A

Abstract

A shifting device (10) that is for shifting the gears of a transmission and that has shift rods (R1-R5), a third shift arm (17) that is affixed to shift rod (R4), and a bolt (30) that fixes the third shift arm (17) to shift rod (R4). The third shift arm (17) has a mounting hole (17b) into which the bolt (30) is screwed and mounted. A snap ring (40) that restricts the outward movement of the bolt (30) is fitted into the mounting hole (17b) in a position that is further to the axial-direction outside than any part of the mounted bolt (30).

Description

Shift device

The present invention relates to a shift device that shifts a transmission, and more particularly to a technique for fixing a fixing portion to a shift rod of the shift device.

2. Description of the Related Art Conventionally, in a shift device for shifting a transmission, a technology for connecting a shift fork engaged with a sleeve of the transmission by a bolt to a shift fork rod (shift rod) is known (for example, Patent Document 1). reference).

JP 2013-199964 A

The shift rod of the shift device is equipped with a large number of fixing parts such as a shift fork and a shift block for moving the shift rod. In many cases, the fixing portion is attached to the shift rod by a bolt, for example.

Since the shift device is housed in the case of the transmission, if the bolt for mounting the fixing part loosens and falls off, the gear of the transmission may be damaged.

On the other hand, in order to prevent the bolt from loosening and to prevent the bolt from falling into the case, a hole is drilled in the head of the bolt, and a wire is passed through the hole when the bolt is assembled. The wire is wound around a shift rod.

</ RTI> In this way, there is a problem that the work load on the worker who installs the bolt is large, that is, the assembling property at the time of assembling the bolt is poor.

This invention is made in view of the said subject, The objective is to provide the technique which can improve the assembly | attachment property at the time of a bolt assembly | attachment while preventing the drop-off | omission of a bolt.

In order to achieve the above object, a shift device according to an aspect of the present invention is a shift device for operating a shift of a transmission, which is fixed to one or more shift rods and the shift rod, and has a mounting hole. A fixing portion that is screwed into and attached to the mounting hole, and that fixes the fixing portion to the shift rod, and is axially outer than any portion of the bolt that is attached to the mounting hole. The movement restricting member for restricting the movement of the bolt to the outside is provided at the position.

In the above shift device, the movement restricting member may have a contact surface that contacts a part of the outer surface of the bolt when the bolt is loosened.

In the shift device, the movement restricting member may be a ring-shaped member that is partially released, and a part of the outer diameter may be reduced by bringing the released part closer.

In the shift device, the movement restricting member may be attached to the attachment hole in a state where the outer diameter of the movement restricting member is larger than the outer diameter of the bolt and the inner diameter of the movement restricting member is smaller than the outer diameter of the bolt.

Further, in the above shift device, the fixed portion may be a shift fork that moves a sleeve for coupling a transmission gear of the transmission.

Further, in the above shift device, the fixed portion may be a shift block that is operated when the shift rod is moved in a predetermined direction.

In the above shift device, the bolt head may be formed with a hole having a polygonal cross section extending in the axial direction.

According to the present invention, it is possible to prevent the bolt from falling off and improve the assembling property when assembling the bolt.

FIG. 1 is a diagram showing a schematic configuration of a shift device according to an embodiment of the present invention. FIG. 2 is a perspective view of a part of the shift device according to the embodiment of the present invention. FIG. 3 is a partial cross-sectional view of a shift device according to an embodiment of the present invention. FIG. 4 is a diagram showing a configuration of a snap ring according to an embodiment of the present invention. FIG. 5 is a view showing an example of bolt attachment according to a modification of the present invention.

Hereinafter, a shift device according to an embodiment of the present invention will be described with reference to the accompanying drawings. The same parts are denoted by the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

FIG. 1 is a diagram showing a schematic configuration of a shift device according to the present embodiment.

The shift device 10 is a device for performing a shift in a mechanical manual transmission. The shift device 10 includes one or more shift rods (first shift rod R1, second shift rod R2, third shift rod R3, fourth shift rod R4, fifth shift rod R5) extending in a predetermined direction, and a guide block 11. A first shift block 12, a second shift block 13, a third shift block 14, a first shift arm (shift fork) 15, a second shift arm (shift fork) 16, and a third shift arm ( (Shift fork) 17, fourth shift arm (shift fork) 18, reverse block 19, reverse lever 20, and detent block 21. Here, the first shift block 12, the second shift block 13, the third shift block 14, the first shift arm 15, the second shift arm 16, the third shift arm 17, the fourth shift arm 18, and the inversion block 19 are It is an example of the fixing | fixed part fixed to a shift rod.

The guide block 11 is fixed to a transmission case (not shown), and has a through hole for inserting each of the first to fourth shift rods R1 to R4. The guide block 11 guides the movement of the shift rods R1 to R4 in the AB direction in the figure.

The first shift block 12 and the first shift arm 15 are fixed to the first shift rod R1. The first shift block 12 engages with one end of the operation lever and moves in the AB direction in the drawing when the reverse or ultra low speed (crawler) is selected by an operation lever (not shown).

The first shift arm 15 is engaged with a sleeve that establishes a transmission path from the input side to the output side of the transmission by being coupled with a reverse transmission gear or an ultra-low speed transmission gear (not shown). .

With this configuration, when reverse or ultra-low speed is selected by the operation lever, the first shift block 12 engaged with the operation lever moves in a direction corresponding to the selection. By the movement of the first shift block 12, the first shift rod R1 to which the first shift block is fixed moves integrally, and the first shift arm 15 fixed to the first shift rod R1 also moves integrally. Then, the sleeve engaged with the first shift arm 15 moves. Thereby, in the transmission, a transmission path is established through the transmission gear according to the selection by the operation lever.

A second shift block 13 and a second shift arm 16 are fixed to the second shift rod R2. The second shift block 13 engages with one end of the operation lever when the first speed or the second speed is selected by an operation lever (not shown) and moves in the AB direction in the figure.

The second shift arm 16 is engaged with a sleeve that is connected to a first gear or a second gear of a transmission (not shown) and establishes a transmission path from the input side to the output side.

With such a configuration, when the first speed or the second speed is selected by the operation lever, the second shift block 13 engaged with the operation lever moves in a direction corresponding to the selection. By movement of the second shift block 13, the second shift rod R2 to which the second shift block 13 is fixed moves integrally, and the second shift arm 16 fixed to the second shift rod R2 also integrally moves. The sleeve that is engaged with the second shift arm 16 moves. This establishes a transmission path via the transmission gear according to the selection by the operation lever in the transmission.

A third shift block 14 and an inverting block 19 are fixed to the third shift rod R3. The third shift block 14 engages with one end of the operation lever when the third speed or the fourth speed is selected by an operation lever (not shown) and moves in the AB direction in the figure.

The reverse block 19 is engaged with one end of the reverse lever 20. The reversing lever 20 is pivotally supported by the transmission case so as to be rotatable.

With such a configuration, when the third speed or the fourth speed is selected by the operation lever, the third shift block 14 engaged with the operation lever moves in a direction corresponding to the selection. Due to the movement of the third shift block 14, the third shift rod R3 to which the third shift block 14 is fixed moves integrally, and the reversing block 19 fixed to the third shift rod R3 moves to move the reversing block. The reversing lever 20 rotates with the movement of 19 to move the third shift arm 17 in the direction opposite to the moving direction of the reversing block 19.

The third shift arm 17 is fixed to the fourth shift rod R4. The third shift arm 17 is engaged with one end of the reversing lever 20. The third shift arm 17 is engaged with a sleeve that is coupled to a third gear or a fourth gear of a transmission (not shown) to establish a transmission path from the input side to the output side.

With this configuration, when the reversing lever 20 is rotated by the movement of the reversing block 19, the third shift arm 17 moves in the direction opposite to the moving direction of the reversing block 19 and engages with the third shift arm 17. The sleeve to be moved moves. This establishes a transmission path via the transmission gear according to the selection by the operation lever in the transmission.

The fourth shift arm 18 is fixed to the fifth shift rod R5. The fourth shift arm 18 is connected to an actuator (not shown), and is moved in the AB direction in the drawing when a low speed or high speed range is selected.

The fourth shift arm 18 is engaged with a sleeve that is coupled to either the low speed side or the high speed side structure of the sub-transmission of the transmission (not shown).

The detent block 21 acts so that the first shift rod R1, the second shift rod R2, and the third shift rod R3 can be stopped at a predetermined neutral position and gear position. Further, the detent block 21 acts so that the fifth shift rod R5 can be stopped at a predetermined gear position.

Next, the fixing of the fixing part (shift block, shift arm, etc.) to the shift rod (R1 to R5) will be described. In the following, the fixing of the third shift arm 17 to the fourth shift rod R4 will be described as an example. However, in the present embodiment, the same configuration is applied to the other fixing portions fixed to the shift rods (R1 to R5). It is fixed by.

FIG. 2 is a perspective view of a part of the shift device according to the embodiment of the present invention. 2 is a view of the range C in FIG. 1 as viewed from the lower side of FIG. In FIG. 2, the lower side of FIG. 1 is represented as the upper side. FIG. 3 is a partial cross-sectional view of a shift device according to an embodiment of the present invention. 3 is a partial cross-sectional view taken along the line DD of FIG.

As shown in FIG. 3, the tip of the bolt 30 for fixing the third shift arm 17 (tapered portion 32) is inserted into the fourth shift rod R4, corresponding to the position where the third shift arm 17 is fixed. A tapered portion R4a is formed.

The fourth shift rod R4 is inserted into the through hole 17a of the third shift arm 17.

As shown in FIGS. 2 and 3, the third shift arm 17 has an attachment hole 17 b for attaching the bolt 30. The bolt 30 has a tapered portion 32 on the through-hole 17 a side (referred to as a lower side in the description of FIGS. 2 and 3), and a thread groove portion 33 in which a thread groove is formed above the tapered portion 32. The head of the bolt 30 is formed with a polygonal hole 31 whose cross section extends in the axial direction of a polygonal shape. The polygonal hole 31 is used when the bolt 30 is attached. With such a configuration, the length of the bolt 30 can be shortened, and each part related to the mounting of the bolt 30 can be downsized.

The mounting hole 17b of the third shift arm 17 communicates with the through hole 17a. A screw groove portion 17c having a screw groove that is screwed with the screw groove portion 33 of the bolt 30 for fixing the third shift arm 17 is formed on the inner periphery on the lower side of the mounting hole 17b.

A space having a longer diameter than the uppermost diameter of the mounting hole 17b is formed at a position above the head of the bolt 30 (also referred to as the axially outer side) when the bolt 30 is mounted in the mounting hole 17b. A snap ring mounting portion 17d is formed. The position of the snap ring mounting portion 17d may be a position in contact with the head of the bolt 30 that is attached, or may be a position having a clearance with the head of the bolt 30.

A snap ring (an example of a movement limiting member) 40 having an outer diameter longer than the uppermost diameter of the mounting hole 17b and an inner diameter shorter than the diameter of the bolt 30 is mounted on the snap ring mounting portion 17d. . Therefore, when the snap ring 40 is mounted on the snap ring mounting portion 17d in such a state, it is difficult to move the snap ring 40 from the snap ring mounting portion 17d to the outside in the axial direction (upward side). For this reason, when the bolt 30 is loosened and the head of the bolt 30 comes into contact with the lower surface (contact surface) of the snap ring 40, the bolt 30 is restricted from moving outward in the axial direction of the mounting hole 17b. It can prevent appropriately falling off from the hole 17b.

FIG. 4 is a diagram showing a configuration of a snap ring according to an embodiment of the present invention.

The snap ring 40 has, for example, a ring-shaped (substantially C-shaped) shape that is partially released. The snap ring 40 can be deformed by reducing the outer diameter of at least a part of the snap ring 40 by sandwiching the two end portions 41 adjacent to each other at the released portion. For this reason, when the outer diameter of the snap ring 40 is reduced and deformed, the snap ring 40 can be easily attached to the snap ring mounting portion 17d, and the assembling property at the time of assembling the bolt can be improved. Moreover, by making the outer diameter of the snap ring 40 into a reduced deformation state, the snap ring 40 can be easily detached from the snap ring mounting portion 17d.

In the two end portions 41 of the snap ring 40, a clamping hole 42 for inserting a portion of a predetermined snap ring fixture is formed in order to clamp the snap ring 40. According to the snap ring attachment tool, the snap ring 40 is easily reduced and deformed by inserting the attachment part into the holding hole 42 of the end portion 41 and sandwiching it, and the snap ring attachment part 17d can easily hold the snap ring attachment part 17d. It can be attached or easily removed from the snap ring mounting portion 17d.

The outer diameter L of the snap ring 40 is not less than the outer diameter of the snap ring mounting portion 17d. Moreover, the inner diameter M of the snap ring 40 is shorter than the outer diameter of the bolt 30, for example. It should be noted that the inner diameter of the snap ring 40 only needs to be shorter than the outer diameter of the bolt 30 when mounted on the snap ring mounting portion 17d.

As described above, according to the present embodiment, when the bolt 30 is loosened, the head of the bolt 30 comes into contact with the lower surface of the snap ring 40, so that the bolt 30 is connected to the shaft of the mounting hole 17b. Movement to the outside in the direction is restricted, and it can be appropriately prevented from falling off the mounting hole 17b.

Next, a modified example of the present invention will be described.

FIG. 5 is a view showing an example of bolt attachment according to a modification of the present invention.

In the above embodiment, the polygonal hole 31 is formed in the head of the bolt 30, but the present invention may be a bolt 30 having a polygonal convex portion 34 as shown in FIG. When such a bolt 30 is used, the shoulder portion 35 of the bolt 30 may come into contact with the lower surface of the snap ring 40 when the bolt 30 is loosened.

It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present invention.

For example, the position where the snap ring 40 comes into contact with the bolt may be a position that can restrict the movement of the bolt mounting hole 17b to the outside in the axial direction. Any position outside the axial direction may be used.

The shape of the snap ring 40 is not limited to the above, and may be any shape as long as the snap ring 40 can be attached to the snap ring mounting portion 17d and the movement of the bolt in the axial direction can be restricted.

In the above embodiment, the snap ring 40 is configured to be easily attached to and detached from the snap ring attachment portion 17d. However, when it is not necessary to assume the removal of the snap ring 40, the snap ring 40 is directed to the snap ring attachment portion 17d. It is possible to adopt a configuration in which it is easy to mount and is difficult to remove.

Further, in the above embodiment, an example of a shift device that receives a driving force of an operation with respect to an operation lever of a driver by a shift block and transmits the driving force to a mechanical manual transmission is shown. A shift device that receives the driving force of the actuator with a shift block and transmits it to the mechanical manual transmission to perform shifting may be used.

This application is based on a Japanese patent application (2015-122857) filed on June 18, 2015, the contents of which are incorporated herein by reference.

The shift device of the present invention is useful in that it can prevent the bolt from falling off and improve the assemblability when the bolt is assembled.

DESCRIPTION OF SYMBOLS 10 Shift apparatus 11 Guide block 12 1st shift block 13 2nd shift block 14 3rd shift block 15 1st shift arm 16 2nd shift arm 17 3rd shift arm 17a Through-hole 17b Mounting hole 17c Thread groove part 17d Snap ring attaching part 18 Fourth shift arm 19 Reversing block 20 Reversing lever 30 Bolt 31 Polygon hole 32 Tapered portion 33 Screw groove portion 40 Snap ring 41 End portion 42 Clamping hole R1 First shift rod R2 Second shift rod R3 Third shift rod R4 First 4 shift rod R5 5th shift rod

Claims

A shift device for operating a shift of a transmission,
One or more shift rods;
A fixing portion fixed to the shift rod and having a mounting hole;
A bolt that is screwed into and attached to the mounting hole, and that fixes the fixing portion to the shift rod;
A shift device having a movement restricting member for restricting movement of the bolt to the outside at a position on the outer side in the axial direction with respect to any portion of the attached bolt in the mounting hole.
The shift device according to claim 1, wherein the movement restricting member has a contact surface that comes into contact with a part of an axially outer surface of the bolt when the bolt is loosened.
The shift device according to claim 2, wherein the movement restricting member is a ring-shaped member that is partially released, and a part of the outer diameter can be reduced by bringing the released portion closer.
4. The device according to claim 1, wherein an outer diameter of the movement restricting member is larger than an outer diameter of the bolt and an inner diameter of the movement restricting member is smaller than an outer diameter of the bolt. A shift device according to claim 1.
The shift device according to any one of claims 1 to 4, wherein the fixed portion is a shift fork that moves a sleeve for coupling a transmission gear of the transmission.
The shift device according to any one of claims 1 to 4, wherein the fixing portion is a shift block that is operated when the shift rod is moved in a predetermined direction.
The shift device according to any one of claims 1 to 6, wherein a hole extending in an axial direction having a polygonal cross section is formed in a head portion of the bolt.