CA2843451A1

CA2843451A1 - Method for manufacture of a shifting component and a sliding block

Info

Publication number: CA2843451A1
Application number: CA 2843451
Authority: CA
Inventors: Horst Dietz
Original assignee: Kokinetics GmbH
Current assignee: Kokinetics GmbH
Priority date: 2013-02-18
Filing date: 2014-02-18
Publication date: 2014-08-18
Also published as: EP2767742B1; CN103994206A; CN103994206B; DE102014101919A1; EP2767742A2; EP2767742A3

Abstract

A Method for manufacturing a shifting component (S) of a vehicle transmission with at least one shifting gate (1) and/or individual shifting gate components (1.1, 1.2, 1.3, 1.4), to which at least one shift arm (2.1, 2.2) is connected in partially swiveling manner, wherein a shift finger recess (3) is formed in the shifting gate (1) and/or each individual shifting gate component (1.1, 1.2, 1.3, 1.4) and at least one fixation opening (4) is made in the shift arm (2.1, 2.2), is characterized by the following steps:
- the shifting gate (1) is adjusted in a first position by introducing a first adjusting mechanism (5) into the shift finger recess (3);
- the fixation opening (4) is adjusted in a second position by means of a second adjusting mechanism;
- the shifting component (S) is measured to determine tolerance variations;
- based on the tolerance variations found, at least one borehole (6) is made in the shift arm (2.1, 2.2) to accommodate a sliding block (7).

Description

Method for manufacture of a shifting component and a sliding block The invention concerns a method according to the preamble of claim 1 and 2 as well as a sliding block according to claim 6.
Prior art Various shifting components and methods of manufacture for them are known and in use from the prior art.
The drawback to these shifting components is the fact that, due to the different manufacturing methods for the individual parts of the shifting component, tolerance variations result when they are assembled together, and these in turn can generally affect the serviceability of the shifting component.
Problem of the invention The problem of the invention is to provide a manufacturing method which enables, in easy and economical fashion, an equalizing of the resulting tolerance variations and a reducing of the level of malfunctions.

Solution of the problem The features of claims 1, 2, 6 and 9 lead to the solution of the problem.
A shifting component manufactured according to the invention serves for installation in a vehicle transmission. By vehicle is meant here motor vehicles, aircraft, ships and trucks. The shifting component here is operated by a gear stick or electromechanically or hydraulically.
The terms shifting component and shift fork can be taken as synonymous in the context of the invention.
The shifting component has a shifting gate, a shifting ramp or a shifting surface. The shifting ramps or shifting surfaces can optionally operate the shift fork via follower rollers. In addition, individual shifting gate components are also present and connected to one or more shift arms so as to partially swivel or move in linear displacement. In the manufacturing method of the invention, the shifting gate can have a curved oblong hole for this, in which a molding of the shift arm engages. The shift arm performs the partial swiveling movement dictated by the curved oblong hole. Furthermore, the shifting gate has a shift finger recess which is necessary for the shifting processes of the shifting component. In addition, a borehole is made in the shift arm to accommodate a sliding block. The sliding block likewise assists the shifting processes of the shifting component.
The shift fork is moved in linear displacement by linear movement of the shift shaft via the shifting ramps of the shifting gate or the shifting gate components via the follower rollers and a lever mechanism.

The shifting gate in the context of this invention means the totality of the individual shifting gate components. By adjusting of each individual shifting gate component by itself, one gains the advantage of an even more precise picture for the tolerance variations.
Furthermore, a fixation opening can be made in the shift arm, which serves for a partially swiveling fixation of the shift arm on a housing. For this, a ball bearing can be installed in the fixation opening.
In another sample embodiment, the shift arm can be eliminated. Consequently, neither is the fixation opening needed any longer.
In a method according to the invention, the shifting gate and/or each individual shifting gate component is connected in partial swiveling manner to a shift arm. For this, a guide bolt of the shift arm is introduced into the curved oblong hole of the shifting gate and/or each individual shifting gate component.
The shifting component has a shifting gate, a shifting ramp or a shifting surface. The shifting ramps or shifting surfaces can operate the shift fork optionally by follower rollers. In addition, individual shifting gate components are also present, which are connected to one or more shift arms in partially swiveling or linear sliding manner. A linear sliding and/or axially rotating shift shaft is used especially in the linear sliding shifting gate or shifting gate component.
Furthermore, a shift finger recess is formed in the shifting gate and/or each individual shifting gate component. The forming of the shift finger recess can be accomplished by known manufacturing methods, such as punching or precision cutting. In addition, at least one fixation opening can be made in the shift arm. The making of the fixation opening can likewise be done by known manufacturing methods, such as drilling or precision cutting or the like. The fixation opening is not needed if the overall arrangement does not include any swiveling movable parts, as is the case with the shift arms of one embodiment, for example.
In the manufacturing method according to the invention, at first the shifting gate and/or each individual shifting gate component is adjusted in a first position by introducing a first adjusting mechanism into the shift finger recess. In the second sample embodiment, the shifting surfaces or shifting ramps are adjusted in the first position. This first position is a nominal position preset by the user. For this, it is possible to introduce a rod element into the shift finger recess so that a form-fitting connection is produced between the rod element and the shift finger recess, for example. The shifting gate and/or each individual shifting gate component has an indentation in its shift finger recess matched to the rod element, into which the rod element can be moved, thereby adjusting the shifting gates in the first position. If a shift finger recess is eliminated because of different kinds of transmission, where the actuation is accomplished by shifting surfaces and/or shifting ramps, then the axially pivoting and linear sliding shift shaft is used for the adjustment.
In another step of the manufacturing method according to the invention, the fixation is adjusted in a second position by means of a second adjusting mechanism. The second adjusting mechanism is a hydraulic or pneumatic locking mechanism, wherein the fixation opening is engaged, partially by the adjusting mechanism and held in the second position, for example. The second position is required to calculate tolerances in dependence on the first position. The finding of the second position can also occur in another sample embodiment by using the linear and axial movable shift shaft as the second adjusting mechanism.
The shift fork is also measured to find tolerance variations. The measuring of the tolerance variations of the shift fork can be done manually, hydraulically, pneumatically or hydropneumatically by a person or electrically or electronically by a sensor.
The tolerance variations are processed in a computer, for example. The processing involves the steps of comparing the nominal data against the actual data and then determining how large a deviation is in fact present.
To factor in the tolerance variations, one determines what the nominal data are for a perfect shift fork and how the actual data differ from these nominal data.
Taking into account the tolerance variations found, at least one borehole is made on the shift arm to accommodate a sliding block. The position of the borehole is made in the shift arm in dependence on the tolerance variations so that the borehole is produced at the point on the shift arm dictated by the nominal data. The sliding blocks are always identical in configuration and only fulfill their function at the point indicated by the nominal data.
In another manufacturing method according to the invention, the tolerance variations found are balanced out by inserting different kinds of sliding blocks in a borehole always made at the actual location, which then make possible a tolerance equalization of the function of the sliding blocks to the nominal data.

The sliding block for inserting in the shift arm of the shift fork has a bolt and an end stop section. The bolt is arranged eccentrically on the end stop section and introduced into a borehole of the shift arm. Preferably, the bolt can be locked in the borehole of the shift arm.
By an eccentric arrangement is meant here that the bolt can be arranged centered, but also in particular off-centered at various positions on the end stop section according to the invention.
In addition, the sliding block is protected against dropping out or getting lost during transport by an axial securing feature.
In the case of the borehole being already present at the actual position, the tolerance equalization is done with different eccentric sliding blocks. In the case of the borehole being present at the nominal position, the tolerance equalization is done always with the same sliding blocks, regardless of whether the bolt is arranged eccentrically or centered on the end stop section. The sliding blocks in this case are configured such that only the matching sliding blocks can fit into the particular borehole. Consequently, borehole and corresponding sliding block are determined by computer. The matching up of the sliding block is done, for example, by the results of the computer when determining the tolerance variation.
Description of figures Further benefits, features and details of the invention will emerge from the following description of preferred sample embodiments, as well as the drawings. These show Figure 1 a side view of a shifting component manufactured according to the method of the invention;

Figure 2 another side view of the shifting component of Figure 1, rotated by 900; and Figure 3 different views of a sliding block according to the invention Figure 4 a schematic side view of another sample embodiment.
Figure 1 shows a shifting component S. The shifting component S has a shift arm 2.1 and a shift arm 2.2. The shift arms 2.1 and 2.2 are connected in partial swiveling manner to a shifting gate 1. In this sample embodiment, the shifting gate 1 consists of four individual shifting gate components 1.1, 1.2, 13, 1.4. For this, not otherwise depicted bolts of the shift arms 2.1 and 2.2 are introduced into slightly curved oblong holes 11 and 12.
Furthermore, the shifting gate 1 has a shift finger recess 3. The shift arms 2.1 and 2.2 each have a reinforcing rib 13 and 14.
Furthermore, one notices a fixation opening 4 roughly in the middle of the shift arms 2.1 and 2.2, and a ball bearing 10 is introduced into each fixation opening 4.
At the other end of the reinforcing rib 13 and 14 from the fixation opening 4 a borehole 6 is made at the end of the shift arm 2.1 and 2.2. This borehole 6 will serve to accommodate a sliding block 7, as shown in Figure 2 and 3.
Figure 2 then shows the sliding block 7 introduced into the borehole 6.
Otherwise, the features already described in Fig. 1 shall not be repeated here. However, it is pointed out that a plurality of shifting gates 1 are also possible.

Figure 3 shows different configurations of sliding blocks 7. Each time, the sliding blocks 7 have a bolt 8 and an end stop section 9. The sliding block 7.1 shows a regular arrangement of bolts 8 and end stop section 9. The bolt 8 here is in a central position. The central position of the bolt 8 here is essentially congruent with the central position of the end stop section 9. The central position of the end stop section 9 is shown by broken line.
The sliding blocks 7.2 and 7.3 show an eccentric arrangement of the bolt 8 on the end stop section 9. The eccentric arrangement of the bolt 8 is accomplished by shifting the bolt 8 to the outside from the central position of the end stop section 9.
The manufacturing process is as follows:
The shifting component is first of all achieved by the connecting of two U-shaped shift arms 2.1 and 2.2 to at least one shifting gate 1. The shift arms 2.1 and 2.2 and the shifting gate 1 are manufactured by methods from the prior art, such as casting, injection molding, punching or sintering or the like. A preferred material here is brass or nonferrous metals or alloys.
First of all, by the inserting of a first adjusting mechanism 5, such as one in the form of a rod element, into the shift finger recess 3, the shifting gate 1 is adjusted in a first position. After this, the fixation opening 4 is adjusted in a second position by means of a second adjusting mechanism. The shifting component S is measured to determine tolerance variations.
Allowing for the tolerance variations found, at least one borehole is made in the shift arms 2.1 and 2.2 to accommodate the sliding block 7. The position of the borehole 6 is determined by comparing the nominal data against the actual data and it is made on the respective shift arm 2.1 and 2.2. At first, a first smaller borehole is made in the shift fork in order to determine the tolerance variation. In a second step, the final borehole (6) is then made, eliminating the tolerance variations.
In a second sample embodiment, the position of the borehole 6 is already predetermined and this by means of the actual data, and a sliding block from a selection of sliding blocks 7 is introduced into the borehole 6 while allowing for the tolerance variations, essentially equalizing the tolerance variations that were found.
The detecting and allowing for the tolerance variations is done by a computer, not otherwise described.
Figure 4 shows a shifting component S. Here, a shift shaft 30 is shown. This shift shaft 30 has a shifting surface in the form of a shifting ramp 31. The shift shaft 30 is mounted able to rotate and slide relative to a central axis. By rotate is meant that the shift shaft 30 can turn about its own center line. By sliding is meant that the shift shaft 30 can be displaced in the center line and its prolongation. Furthermore, a follower roller 32 is shown, which can operate a shift fork 33. Depending on the position of the shift shaft 30, the follower roller 32 is activated and in turn activates a slider frame 34, which in turn is in operative connection with the shift fork 33. Thanks to the shift fork 33 in turn, a shifting element 35 is rotated and moved up to a first sliding block 36 or a second sliding block 37 and enters into operative connection with either the first sliding block 36 or the second sliding block 37, respectively.

List of items S Shifting component 1. Shifting gate 2. Shift arm 3. Shift finger recess 4. Fixation opening 5. Adjusting mechanism 6. Borehole 7. Sliding block 8. Bolt 9. End stop section 10. Ball bearing 11. Oblong hole 12. Oblong hole 13. Reinforcing rib 14. Reinforcing rib 30. Shift shaft 31. Shifting ramp 32. Follower roller 33. Shift fork 34. Slider frame 35. Shift element 36. First sliding block 37. Second sliding block

Claims

1. Method for manufacturing a shifting component (S) of a vehicle transmission with at least one shifting gate (1) and/or individual shifting gate components (1.1, 1.2, 1.3, 1.4), to which at least one shift arm (2.1, 2.2) is connected in partially swiveling manner, wherein a shift finger recess (3) is formed in the shifting gate (1) and/or each individual shifting gate component (1.1, 1.2, 1.3, 1.4) and at least one fixation opening (4) is made in the shift arm (2.1, 2.2), characterized by the following steps:
- the shifting gate (1) and/or each individual shifting gate component (1.1, 1.2, 1.3, 1.4) is adjusted in a first position by introducing a first adjusting mechanism (5) into the shift finger recess (3) of the shifting gate (1) and/or each individual shifting gate component (1.1, 1.2, 1.3, 1.4);
- the fixation opening (4) is adjusted in a second position by means of a second adjusting mechanism;
- the shifting component (S) is measured to determine tolerance variations;
- based on the tolerance variations found, at least one borehole (6) is made in the shift arm (2.1, 2.2) to accommodate a sliding block (7).

2. Method for manufacturing a shifting component (S) of a vehicle transmission with at least one shifting gate (1) and/or individual shifting gate components (1.1, 1.2, 1.3, 1.4), to which at least one shift arm (2.1, 2.2) is connected in partially swiveling manner, wherein a shift finger recess (3) is formed in the shifting gate (1) and/or each individual shifting gate component (1.1, 1.2, 1.3, 1.4) and at least one fixation opening (4) is made in the shift arm (2.1, 2.2), wherein a borehole (6) is made in the shift arm (2.1, 2.2) to accommodate a sliding block (7), characterized by the following steps:
- the shifting gate (1) and/or each individual shifting gate component (1.1, 1.2, 1.3, 1.4) is adjusted in a first position by introducing a first adjusting mechanism (5) into the shift finger recess (3) of the shifting gate (1) and/or each individual shifting gate component (1.1, 1.2, 1.3, 1.4);
- the fixation opening (4) is adjusted in a second position by means of a second adjusting mechanism;
- the shifting component (S) is measured to determine tolerance variations;
- based on the tolerance variations found, a sliding block from a selection of sliding blocks (7) is inserted in the borehole (6), essentially equalizing the tolerance variations found.

3. Method for manufacturing a shifting component (S) of a vehicle transmission with at least one shifting gate (1), wherein the shifting gate (1) has a shifting ramp or a shifting surface, wherein the shifting gate (1) is arranged on the shifting shaft, wherein the shifting shaft can pivot axially and move linearly, characterized by the following steps:

- the shifting gate (1) and/or each individual shifting gate component (1.1, 1.2, 1.3, 1.4) is adjusted in a first position by operating the shift shaft;
- the shifting component (S) is measured to determine tolerance variations;
- based on the tolerance variations found, at least one borehole (6) is made in the shift arm (2.1, 2.2) to accommodate a sliding block (7).

4. Method for manufacturing a shifting component (S) of a vehicle transmission with at least one shifting gate (1), wherein the shifting gate (1) has a shifting ramp or a shifting surface, wherein the shifting gate (1) is arranged on the shifting shaft, wherein the shifting shaft can pivot axially and move linearly and a borehole (6) is made to accommodate a sliding block (7), characterized by the following steps:
- the shifting gate (1) and/or each individual shifting gate component (1.1, 1.2, 1.3, 1.4) is adjusted in a first position by operating the shift shaft;
- the shifting component (S) is measured to determine tolerance variations;
- based on the tolerance variations found, a sliding block from a selection of sliding blocks (7) is inserted in the borehole (6), essentially equalizing the tolerance variations found.

5. Method according to one of the preceding claims, characterized in that the tolerance variations are determined by a comparing of nominal data against actual data of the shifting component or the shift fork (S).

6. Method according to claim 1 or 3, characterized in that the borehole (8) is introduced at the point of the shift arm (2.1, 2.2) dictated by the nominal data to equalize the tolerance variations.

7. Method according to one of claims 1, 2, 5, 6, characterized in that a rod element (4) is used as the first adjusting mechanism.

8. Method according to one of claims 3 to 6, characterized in that the shift shaft is used as the first adjusting mechanism.

9. Method according to one of the preceding claims, characterized in that the detecting and the factoring in of the tolerance variations is done by a computer.

10. Method according to one of claims 1, 2, 5, to 9, characterized in that a ball bearing (10) is inserted in the fixation opening (4).

11. Method according to one of the preceding claims, characterized in that the shifting gate (1) is operated by a gear stick or electromechanically or hydrostatically.

12. Sliding block for inserting into a shift arm (2.1, 2.2) of a shifting component (S) with a bolt (8) and an end stop section (9), characterized in that the bolt (8) is arranged eccentrically on the end stop section (9).

13. Sliding block according to claim 9, characterized in that the bolt (8) can be introduced into a borehole (6) of the shift arm (2.1, 2.2).

14. Sliding block according to claim 10, characterized in that the bolt (8) can be locked in the borehole (6) of the shift arm (2.1, 2.2).

15. Use of a sliding block according to claims 12 to 14 in a method according to claims 1 to 11.