JPH0241755Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention is a measured value signal generator having a sleeve-shaped casing formed as a screw-in connecting piece, the conductor carrying the electrical component of the measured value signal generator. It relates to a configuration having a device for retaining the plate within the casing.

It is generally known in measurement value signal generators that form the measurement value signal by disharmony of the oscillation circuit that one element of the oscillation circuit and the measurement value sensor are connected to the remaining electrical elements of the oscillation circuit and, if appropriate, It is also desirable to directly assign the circuit elements for signal generation, thereby keeping attenuation losses and interference levels to a minimum.

In many applications of this type, the electrical components for generating the measured values are exposed to high vibrational loads, aggressive media and significant heat loads, i.e. in a harsh environment. Due to the structure of the signal generator, extremely difficult processing is required when installing it at the point of installation, and therefore the circuitry for forming the measured value signal is built into the generator casing, which requires heating of the electrical components themselves. It is therefore necessary to maintain certain limits with respect to the packing density, which also presupposes the need to obtain as small a structural volume as possible, in particular a narrow structural shape. Furthermore, in measurement value signal generators of this type, conditions such as mass production and possibly mechanical assembly, the necessity of adapting at minimum cost to various installation requirements, and furthermore, Consideration must also be given to the need for sufficient functional testability during the installation stage, where component parts can be replaced at low cost.

Each construction of known measured value signal generators of the type described only satisfies one or the other of the two sets of conditions mentioned above; rather, each known construction is expensive, for example due to the use of screw connections, or This can be a cumbersome assembly structure that requires soldering work when assembling the electrical components into the generator casing.

Therefore, the problem of the present invention is to develop a measured value signal generator of the type described above, with regard to manufacturing and installation costs, testability, and ease of installation, taking into consideration the above-mentioned conditions of use of the generator. The objective is to provide a structure that can consistently provide the best in terms of suitability, etc.

According to the invention, the above object is achieved by providing an approximately cup-shaped protective sleeve which can be inserted into the housing of the measured value signal generator and which can be fixedly connected to the housing. This problem has been solved in that an axially parallel guide groove corresponding to the conductor plate is formed, and that the conductor plate is secured in the axial direction within the protective sleeve by means of a filler.

According to advantageous embodiments of the invention, the measured value signal sensor is arranged on the end face of the printed circuit board, and the plug-in tab serving for transmitting the measured value is in direct contact with the printed circuit board. A portion of the plug-in tab is embedded in the injection body forming the end-side closure of the measured value signal generator, and a ring shoulder is formed inside the housing, with a corresponding ring-shaped flange surface. a protective sleeve having a collapsible edge formed on the end face of the casing to hold the protective sleeve in position within the casing defined by the ring shoulder and the flange surface; Good.

The main advantage of the design of the invention is that the structural shape of the generator casing can be made elongated, allowing for example the use of box spanners, while still providing sufficient space for the arrangement of each electrical component. Another advantage is that since all the electrical component units are arranged on one conductor plate, a component group is formed that is easy to handle and whose functions can be inspected. However, it is crucial that the entire electrical component can be placed in one protective sleeve and that the electrical component can be inserted into the protective sleeve by a particularly simple method of filling or injecting with a suitable filler. It is possible to combine with Furthermore, by selecting the method of retaining the conductor plate in the protective sleeve, it is possible to avoid the risk of constriction of the conductor plate, which can occur, for example, during screw connections, and by forming an injection body in the protective sleeve. It is now possible to bury electrical components in a vibration-resistant and airtight manner.

Moreover, the mounting means according to the invention not only protect the electrical components of the measured value signal generator from damage during subsequent mounting operations, but also form a structural unit that can be stored and shipped, which is to a certain extent generally applicable. It can be used or combined with different differently configured casings. Furthermore, depending on the application, the casing, which generally requires a manufacturing process by cutting and which can be produced in a manufacturing process completely separate from the electrical parts of the measured value signal generator, can be used, for example, for the electrical wires to be connected. For this purpose, a screw type or plug-in lock type member is provided,
It is also possible to have different screw threads depending on how the measured value signal generator in question is fastened. It is also possible to use a specially designed casing for high thermal expansion or, for example, if high corrosion resistance is required, a casing made of a corresponding special material.

Furthermore, the construction of the embodiments of the invention is advantageous in that the measured value signal generator can be assembled without tools, ie the number of necessary components is thereby significantly reduced.

The invention will now be described with reference to the illustrated embodiment.

As can be seen in FIG. 1, an approximately cup-shaped protective sleeve 2 is provided with a so-called inner lining in the actual housing 1 of a measured value signal generator, which is designed, for example, as a rotational value pulse generator and is arranged in a motor vehicle transmission. It is arranged as a member. In the illustrated example, a conductor plate 5 is held within this protective sleeve 2 that protrudes from the casing 1 on the sensor side in guide grooves 3 and 4 formed in the protective sleeve 2 parallel to the axis. This conductor plate 5 carries all the electrical components of the measured value signal generator in question, i.e. the oscillator and the subsequent recognition circuits, pulse-forming circuits, amplifier circuits, etc. are designated in their entirety. In addition to the component unit 23, a plurality of insertion tongues (only two of which are designated by numerals 6 and 7) are in contact with each other, and a pot-shaped iron core is also provided on the end face side of the conductor plate 5. 8
An oscillating coil 9 is fixed therein and serves as a measured value sensor, one of the two connecting conductors of which is designated by 26. For this purpose, a component 10 is used which can be connected to the conductor plate 5 and is formed with a pin 11 for receiving the pot core 8. Of course, the fixing of the measured value sensor itself requires only its attachment to the conductor plate 5, but other means, such as gluing, are also conceivable, since according to the functional tests carried out, the measurement value signal in question It has been found advantageous to fix the conductor plate 5 in the protective sleeve 2 by means of a suitable injection body 12 (shown transparently in FIG. 1) which forms a seal on the end side of the device. It is from. It is further conceivable to arrange the conductor plate 5 centrally in the protective sleeve 2 and, if necessary, to distribute the electrical components 23 on both sides of the conductor plate 5 and to form the pot core 8 on the conductor plate 5. It is to be received directly at the attached attachment part.

In the embodiment of FIG. 1, the structural shape provides sufficient space for each electrical component 6, 7, 8, 9 and 23, as is clear from the drawing.
Furthermore, the fixing in the casing 1 of the electrical part of the measured value signal generator, which is formed completely separately from the casing 1 as described above and whose function can be tested, is formed on the end face side of the casing 1. This is done by folding the curling flange edge 13. In this case, by means of a collar 14 formed on the protective sleeve 2, that is to say by means of a flange surface 15 provided on the collar 14, the protective sleeve 2 rests on a ring shoulder 16 formed in the housing 1. There is. A seal 17 inserted between the casing 1 and the protective sleeve 2 serves to prevent leakage of transmission oil. Also, casing 1
As a fit for the protective sleeve 2 inward, it is also possible to use a ring shoulder 18, which is present in any case due to the two-stage design of the two parts, so that the housing 1 and the protective sleeve 2 can be formed flat on the side end surface of the insertion part.

In order to make the invention more complete, a housing 1 which is designed as a sleeve-shaped screw-in connecting piece is provided with a first casing 1 which serves for the fastening of the measured value signal generator to the transmission casing of a motor vehicle. It is preferable to provide a thread 19 and a second thread 20 corresponding to the connecting member of the electric wire. Reference numeral 21 designates a hexagonal head for mounting an installation tool, and reference numeral 22 designates a ring-shaped abutment surface that acts between the generator and the transmission casing.

In the embodiment shown in the sectional view in FIG. 3, the securing of the protective sleeve 2 in the housing 1 takes place by a locking connection, that is to say there is a locking groove 24 in the housing 1 and a locking groove 24 in the protective sleeve. 2 is formed with a beveled locking collar 25 on the side in the insertion direction, and the injection body 12 is made or adjusted to be elastic to some extent, for example by suitably adjusting its hardness.

FIG. 4 shows an embodiment of a bayonet contact structure, which is somewhat less advantageous than the above-mentioned example, and may be advantageous if, for example, it is necessary to use a circular bayonet pin 28. . The end-side closure of the measured value signal generator in this case is formed by an insulating plate 29 which is also folded and seamed to the housing 1, in which the
A plug-in pin 28, which is designed as a hollow pin, is fixed. The electrical connection between the insertion pin 28 and the conductor plate 5 is made by a relatively hard wire 27 that is in contact with the conductor plate 5, and the wire 27 is soldered into the insertion pin 28.

[Brief explanation of the drawing]

The drawings show several embodiments of the invention, in which FIG. 1 is a longitudinal sectional view of an advantageous measured value signal generator according to the invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIG.
4 is a sectional view of a locking member acting between the protective sleeve and the casing, and FIG. 4 is a sectional view of a plug-in contact device according to another embodiment of the invention. 1... Casing, 2... Protective sleeve, 3,
4... Guide groove, 5... Conductor plate, 6, 7... Insert tongue piece, 8... Pot type iron core, 9... Oscillation coil,
10... member, 11... pin, 12... injection body,
13... Curling flange edge, 14... Brim,
15... Flange surface, 16, 18... Ring shoulder, 17... Seal, 19, 20... Thread thread,
21... Hexagonal head, 22... Abutting surface, 23... Electrical component unit, 24... Locking groove, 25... Locking collar, 26... Connection conductor, 27... Wire, 28
...Plug-in pin, 29...Insulation plate.

Claims (1)

[Claims for Utility Model Registration] 1. A measured value signal generator having a sleeve-shaped casing formed as a screw-in connecting piece, the conductor plate holding the electrical component of the measured value signal generator. an approximately cup-shaped protective sleeve 2 which can be inserted into the casing 1 of the measured value signal generator and fixedly connected thereto;
are provided in the protective sleeve 2, and guide grooves 3, 4 parallel to the axis corresponding to the conductor plate 5 are provided in the protective sleeve 2.
Measured value signal generator, characterized in that the conductor plate 5 is secured in the axial direction within the protective sleeve 2 by a filler body 12. 2 A ring shoulder 16 is formed inside the casing 1, and a ring-shaped flange surface 15 corresponding to the ring shoulder 16 is connected to the protective sleeve 2.
In order to hold the protective sleeve 2 in a position within the casing 1 defined by the ring shoulder 16 and the flange surface 15, a collapsible lip 13 is provided on the end face of the casing 1. A measured value signal generator according to claim 1, wherein the measured value signal generator is configured as claimed in claim 1. 3. Measured value signal generator according to claim 2, in which a locking connection is provided between the casing 1 and the protective sleeve 2. 4. The plug-in tabs 6, 7 that serve for the measurement value transmission are in direct contact with the conductor plate 5, and a portion of the plug-in tabs 6, 7 is located in the end-side closing part of the measured value signal generator. A measured value signal generator according to claim 3, which is embedded in an injection body 12 forming a . 5. The measurement signal generator according to claim 4, wherein the measurement value sensor 9 is arranged on the end face of the conductor plate 5.