JPH04506106A - Method of manufacturing gear transmission switching fork - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Method of manufacturing a switching fork for a gear transmission The placed shoe fits into the switching fork groove of the slide sleeve, making it self-lubricating. A method of manufacturing a switching fork for a gear transmission made from a certain wear-resistant material. It is something that

This kind of switching fork is well known from DE-GM7105]11 and has a metal body. A U-shaped shoe is attached by a clamp or adhesive connection. in the main body The clamp connection of the plastic shoe requires only a slight flat press on the shoe. Otherwise, the shoe has the disadvantage that it is no longer fixed to the main body.

In addition, the adhesive bond between the shoe and the main body does not have sufficient fatigue strength, and the contact surface is completely covered with oil. Adhesive methods are expensive because they must be free of debris.

It is therefore an object of the invention to manufacture switching forks in a range of dimensions at low manufacturing costs. We developed a method for manufacturing a switching fork that is suitable for It is about providing.

According to the characteristic part of claim 1, this problem can be solved by making the entire shoe an S+ member. In the subsequent manufacture of the body from aluminium, pre-finished and die-cast, The surface that does not contact the switching fork groove is embedded in the die casting. before the casting process. The molded shoe is surrounded by liquid aluminum after curing of the aluminum melt. This joining of the parts occurs.

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According to claim 2, the main body includes a radially inner mount in which the shoe is embedded. Web is provided. As described in claim 3, the shoe is manufactured by precision casting. The inner spacing of the brass profile is made as a more U-shaped wing than the web. approximately equal to the width of During die casting manufacturing, the web is the internal space of the brass profile. 1, and accommodates the U-shaped side legs, and the side slide stone of the shoe is made of aluminum. You cannot have um melts. Moreover, during the subsequent switching movement of the switching fork, Produced as a square body, the hollow chambers being embedded in the web. wall part complete The remaining three legs are placed in the aluminum melt and wetted. The use of this type of rectangular body without moisture is particularly important if the shoe is not in the switching fork groove. It appears when you also have to slide in the radial direction.

Furthermore, claim 5 provides a brass shaped body with a through hole for die casting. I suggest that you do so. This through-hole, on the one hand, allows the aluminum melt to pass through the shoe. Ensures complete filling of the hollow chamber and, on the other hand, a geometrical closure between the body and the shoe features improvements in According to claim 6, the shoe has an adjustable circular window in which the die-casting The shoe holds the aluminum melt during the process.

To further explain the invention, a switching fork manufactured according to the method according to the invention will be described. Reference is made to the drawings illustrating the Figure 1 is fitted into the die-cast metal of the main body. Side view of the switching fork in partial section in the area of the shoe, FIG. 2 shows the shoe in enlarged dimensions. -, Fig. 3 respectively show longitudinal sectional views taken along the line ■--■ of the shoe in Fig. 2.

In FIG. 1, 1 represents a switching fork, which has teeth through a hole 2. Can be installed on the switching rod of a car transmission. The illustrated switching fork 1 is in a fully assembled state. The fork-shaped legs 3 and 4 of the main body 5 on a common arc have respective Then, the shoe 6 is placed. These shoes 6 are connected to the shoes (not shown) of the gear transmission. It gets into the switching fork groove (not shown) of the ride sleeve, and this slide sleeve The longitudinal movement of the switching rod turns the gear transmission on and off. Make sure to do so. As is particularly clear from FIGS. 2 and 3, the shoe 6 has a U-shaped structure. will be accomplished. The shoe 6 has side walls 7, 8 and a bottom 10 with a through hole 9. Vertical extension In the section, the U-shaped shape of the shoe 6 is closed by the wall 11, and the label wall 11 has an adjustable circular shape. Window 12 is attached. Shoe 6 has sufficient wear characteristics and slippage due to precision casting. Made from brass with characteristics.

The main body 5 of the switching fork 1 with the radially inner web 13 is made by die-casting. Manufactured from aluminum, the shoe 6 is die-cast in its circular window 12. During the process, it is fixed in the aluminum melt. At that time, the shoe has its U-shaped The bottom part 10 is fixed to the body 5 with the open side radially inward. both side walls 7.8 is a switching fork extending on both sides of the web and subsequently assembled, the switching fork slipping on the corresponding side wall of the groove.

Explanation of symbols 1 Switching fork 2 holes 3 Switching fork legs 4 Switching fork legs 7 Side wall of shoe 8 Shoe side wall 9 Through hole 10 Bottom 11 walls 12 Adjustable circular window 13 Main body web international search report international search report Hair "/Iwa., 9□ri100881

Claims (6)

[Claims] 1. A shoe (6) arranged on the fork-shaped body (5) cuts the slide sleeve. Gear shifting made of a wear-resistant material that fits into the shifting fork groove and has self-lubricating properties. In the method of manufacturing the switching fork (1) of the device, the entire shoe (6) is a separate member. The main body (5) is made of pre-finished and die-cast aluminium. When manufacturing, surfaces that do not contact the switching fork grooves are embedded in the die casting. The method characterized in that: 2. The body (5) is provided with a radially inner web (13) in which the shoe (6) is embedded. The method according to claim 1, characterized in that the method comprises: 3. The shoe (6) is made as a U-shaped brass body by precision casting. Claim characterized in that the side walls of the wedge-shaped body are approximately equal to the width of the web (13). The method described in section 2. 4. The shoe (6) is made as a hollow rectangular body by precision casting. 3. A method according to claim 2, characterized in that the chambers are embedded in the web. 5. The brass profile is characterized in that it has a through hole (9) for die casting. A method according to one of claims 3 or 4. 6. The shoe (6) is held while the shoe (6) is placed in the die casting. The method according to claim 1, characterized in that it has an adjustable circular window (12) that Law.