JPS6280330A - Detector in automatic speed change gear - Google Patents

Abstract

PURPOSE:To make possible to produce a detector separately from an air cylinder, by coupling a link member provided with a detecting magnet piece, removably to a gear shift shaft in a speed change gear. CONSTITUTION:A select shaft 4a which is axially displaced in association with the operation of an air cylinder 4 for selecting a speed change gear, is coupled at its one end with a link member 11 by means of a thread stop mechanism. This link member 11 is provided therein with a magnet piece 15 as a magnet element which may detect three positions of the select shaft 4a in cooperation with magnetically sensitive elements 19a, 19b, 19c.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a detection device used in a vehicle transmission that selects and shifts in response to electrical command signals from an operating unit.

``Prior Art'' Electrical control devices for vehicle transmissions are well known.

FIG. 9 is a block diagram showing an example of this type of control device, in which 1 is an operating unit, 2 is an electric control circuit unit, and 3 is a transmission unit.

The operation section unit 1 is a finger type that can be operated by hand, and the electrical command signal generated from this is supplied to the electric control circuit unit 2, which in turn controls the air cylinder 4 or 5 according to the command signal. In order to operate the valve, one of the electromagnetic pulps 6a, 6b, 7a, and 7b is controlled to open. In the air cylinder 4, the piston shaft 4a serves as a selection shaft, and the transmission 8 is selectively operated by the forward and backward movement of the piston shaft 4a.
In the air cylinder 5, a piston shaft 5a serves as a shift shaft, and the transmission 8 is shifted by the forward and backward movement of the piston shaft 5a.

Now, such a control device is air cylinder 4.
．． 5 is provided with a detection device 9.10, each shirt) 4a,
In many cases, the operating state of the transmission 8 is detected from the forward and backward movement of the transmission 5a. That is, when the selection and shifting of the transmission 8 do not follow the command signal, the control is re-controlled based on the detection signal from the detection device 9.10 to shift to a normal speed change state.

The detection device 9.10 included in the conventional control device described above has an electric contact that is connected to the forward and backward movements of the select shaft 4a and the shift shaft 5a, and has an electric contact that contacts the detection element in the forward and backward positions. It has become.

Such a detection device 9, 10 is not necessarily suitable for this type of control device that is frequently used, and failures are likely to occur due to wear, breakage, deterioration of elasticity, etc. of the electric contacts.

A malfunction of the detection device 9 or 10 cannot be detected even if the transmission 8 is in an unpredictable gear shifting state, so it appears as a malfunction or an inability to shift gears, which can be dangerous and serious when driving the vehicle. It becomes a problem.

In view of the above-mentioned circumstances, the applicant of this patent application developed a detection device that electromagnetically detects the forward and backward positions of the select shaft 4a and the shift shaft 5a, and filed patent application number 15 in 1985.
A patent application has been filed as No. 2193.

Such a detection device includes small magnets provided on the select shaft 4a and the shift shaft 5a, and the shaft 4
A magnetically sensitive element is provided in the device fixing part, and this small magnet faces in the advancing and retracting positions of a and 5a. In the detection device configured in this way, the detection element has a non-contact structure.
High reliability with very few failures.

"Problems to be Solved by the Invention" The present invention relates to an improvement of a detection device equipped with the above-described electromagnetic detection element.

This type of detection device is constructed by providing small magnets on the select shaft 4a and the shift shaft 1-5a, and fixing the main body of the device, which is equipped with magnetic sensing elements corresponding to the small magnets, to an air cylinder. .

Therefore, since a partial configuration of the detection device is installed on the air cylinder side, the detection device itself cannot be produced independently.

However, in order to test or adjust the detection sensitivity, it is preferable to have a configuration that can be produced independently, and it is also convenient in terms of designing and manufacturing the detection device.

"Means for Solving the Problems" In view of the above-mentioned circumstances, the purpose of the present invention is to develop an electromagnetic detection type detection device that can be produced independently and later attached to an air cylinder. shall be.

Therefore, in the present invention, a detection device is included in a vehicle transmission unit that responds to an electrical command signal from an operation unit, and is used to detect whether or not selection and shifting of the transmission are in accordance with the command signal. In the device, this detection device
A vehicle that includes an interlocking member that is detachably attached to a gear shifting shaft of a transmission, a magnetic element provided on the interlocking member, and a magnetically sensitive element provided on a device fixing part where the magnetic element faces at a variable position of the interlocking member. We propose a detection device for transmissions.

"Example" Next, embodiments of the present invention will be described with reference to the drawings.

It should be noted that since the detection device for detecting variations in the select shaft and the detection device for detecting variations in the shift shaft have similar configurations, only the embodiment of the former detection device will be described.

FIG. 1 is a longitudinal sectional side view of a detection device attached to an air cylinder, and FIG. 2 is a sectional view taken along line A--A in FIG. 1.

In these figures, reference numeral 4a denotes the above-mentioned selection shaft, which rotates 3 in the axial direction (horizontal direction in Figure 1) according to the operation of the air cylinder 4 that selects the transmission 8.
change to two positions.

Reference numeral 11 denotes an interlocking member connected to the above-mentioned shirt 4a, which is detachably connected by a snap mechanism.

The screw fixing mechanism includes a screw hole 4b provided in the shaft 4a, and a screw rod 1 with a collar 12a screwed into the screw hole 4b.
2, a screw 13 that fixes the screw rod 12 with an appropriate threading length, and the interlocking member 11 that is rotatably inserted into the screw rod 12 beyond the collar 12a (on the left side in FIG. 1). It is composed of E IJ song 4 that stops the removal.

The interlocking member 11 described above is L-shaped, and a small magnet 15 is embedded in its horizontal part, and a narrow guide arm 11a is formed in its hanging part to keep the interlocking member 11 non-rotating. be.

If an air cylinder with a non-rotating piston shaft is used, the interlocking member 11 is provided integrally with the threaded rod 12, and the guide arm 11a is not required.

16 is a tubular fixed body screwed onto the air cylinder 4, and as is clear from FIG.
A flat portion 16a formed by cutting the same curved surface on the upper side is provided,
Furthermore, a rectangular hole 16b is formed in the flat portion 16a, and the horizontal portion of the above-mentioned interlocking member 11 faces this rectangular hole 16b.

Reference numeral 17 denotes a holder screwed to the above-mentioned flat portion 16a, and a circuit board 18 having magnetic sensing elements 19a, 19b, and 19C is fixed to the lower surface of this holder.

20 is a lead wire for electrically connecting the circuit board 18.

The circuit board 18 is configured in the form of a chip using a hybrid IC (HIC), and also includes magnetic sensing elements 19a, 19b, 1
9C can be a known one, for example, a hole rC, which is integrated with the circuit board 18 by HIC configuration.

The magnetic sensing elements 19a, 19b, 19C are the flat portions 16
The interlocking member 1 protrudes into the rectangular hole 16b provided in
The arrangement is such that the small magnet 15 provided in 1 faces one of the magnetically sensitive elements.

Reference numeral 16c denotes a guide groove into which the guide arm 11a of the interlocking member 11 enters, and is formed on the inner circumferential surface of the fixed body 16.

21 is a pot-shaped case that covers the outer surface of the fixed body 16;
This is fixed by screwing onto the fixed body 16.

Next, the operation of the above-described detection device will be explained.

Assuming that the interlocking member 11 is in the variable position shown in FIG. 1 and in a state where the first working speed ■ and the second speed ■ (see FIG. 9) are selected, the detection signal from the magnetically sensitive element 19a is The signal is sent to the electric control circuit unit 2. The air cylinder 4 shifts to 3rd speed ■ and 4th speed according to the command signal.
When the speed ■ is selected, the interlocking member 11 advances to the next position, and the small magnet 15 engages the magnetically sensitive element 19b.
to face. Therefore, in this selection stage, a detection signal is sent by the magnetically sensitive element 19b.

Similarly, when the air cylinder 4 operates to select 5th speed ■ and reverse ■ according to the t command signal,
The interlocking member 11 is in the most advanced position as shown by the imaginary line in FIG.
Opposite C. At this selection stage, the magnetically sensitive element 19
A detection signal by C will be sent.

In this way, as long as the transmission 8 normally performs the selection operation in accordance with the command signal, the electric control circuit unit 2 performs the confirmation process.

Furthermore, even though the command signal is a back signal, if the air cylinder 4 does not operate and the interlocking member 11 maintains the position shown in FIG. However, in order to receive and receive the detection signal of the magnetically sensitive element 19a, the electric control circuit unit 2 immediately determines that there is a malfunction and performs corrective processing such as re-controlling.

In any case where the selection operation of the transmission 8 does not follow the command signal, the small magnet 15 and the magnetically sensitive element 1
Regular phase with 9a, 19b, 19C.

Since the relationship cannot be maintained, malfunction determination and correction processing as described above is performed.

Further, in the above-described detection device, since the interlocking member 11 is kept non-rotating, the small magnet 15 is connected to each magnetically sensitive element 19a, 19.
b, 19c, and since the selection shaft 4a is rotatable relative to the interlocking member 11, it does not affect the operation of the air cylinder 4.

On the other hand, as already mentioned, the detection device for detecting fluctuations in the shift shaft has the same configuration as the selection detection device described above, and the shift shaft moves forward and backward in accordance with a command signal to shift the transmission 8. When the small magnet operates, the small magnet normally faces each magnetically sensitive element, and when the shift operation does not follow the command signal, the normal opposing relationship between the small magnet and each magnetically sensitive element is not achieved, so the electric control circuit Unit 2 will perform the determination and processing operations.

As described above, the detection device of this embodiment has a configuration in which the interlocking member 11 is connected to the selection shaft 1-43 by a screw mechanism, and the detection device is produced separately and installed in the air cylinder 4. In addition, by adjusting the threaded length of the spring rod 12 and then fixing it with the screw 13, the attachment position of the interlocking member 11 can be adjusted. Adjusting the position of the interlocking member 11 is extremely important in order to most appropriately face the small magnet 15 and each magnetically sensitive element 19a, 19b, 19C to improve detection accuracy.

Next, FIGS. 3 and 4 show other embodiments of the present invention. Note that although the selection detection device is shown in this embodiment as well, the shift detection device has a similar configuration.

FIG. 3 is a side view in dark blue of a detection device similar to that shown in FIG. 1, and FIG. 4 is a sectional view taken along the line B--B in FIG.

This embodiment is characterized in that a cylindrical interlocking member 22 is movably provided within the detection device, and one end of the interlocking member 22 is detachably fitted and connected to the selection shaft 4a.

That is, one end of the interlocking member 22 protrudes from the bottom 16d of the fixed body 16, and as shown in perspective in FIG. 5, this -mH has a circular diameter shaft 22a and a circular enlarged diameter head. A fitting protrusion consisting of 22b is provided.

Further, a protrusion 4c is provided at the rear end of the selection shaft 4a, and a fitting hole 4d is formed in this protrusion 4c. As can be seen from FIGS. 6 and 7, the fitting hole 4d is T-shaped when viewed from above.

The fitting connection mechanism as described above connects the interlocking member 22 and the shaft 4a detachably by fitting the enlarged diameter head 22b of the interlocking member 22 into the fitting hole 4d of the shirt 4a. I can do it.

Figures 7 and 8 are enlarged partial views showing the connected state;
The figure is a plan view of the above-described fitting and connecting mechanism, and FIG. 8 is a sectional view taken along the line CC in FIG. 7.

On the other hand, the interlocking member 22 is provided with a ring body 23 as shown in FIGS. 3 and 4. This ring body 23 is rotatable between the &V 22c integrated with the interlocking member 22 and the E ring 24, and has grooves 23a and 23b along the longitudinal direction at the upper and lower parts. And the upper groove 2
A small magnet 25 is fixed to a part of 3a, and a guide pin 26 fixed to the fixed body 16 protrudes into the lower strip 123b. This guide pin 26 keeps the ring body 23 non-rotatable.

In this embodiment, the position of the interlocking member 22 changes according to the movement of the selection shaft 4a, and from this, the small magnet 25
A detection signal is generated according to the correspondence between the magnetic sensing elements 19a, 19b, and 19c, and such a detection operation is similar to the embodiment shown in FIGS. 1 and 2.

However, in this embodiment, the interlocking member 22 is movably provided within the fixed body 16, and the detection device can be produced as a finished product, so production work can be carried out without being directly involved with the air cylinder 4. Tests and adjustments can also be carried out independently.

In the above embodiment, the transmission 8 has five forward speeds and one reverse speed.
We have explained the detection device used in the above, but for transmissions with different numbers of gears, the number of magnetic sensing elements and their arrangement, or the number and arrangement of small magnets, etc. can be configured to match the number of gears. It can be carried out in the same manner as in the above embodiment.

"Effects of the Invention" As described above, in the detection device according to the present invention, the interlocking member for providing the small magnet is detachably connected to the gear shift shaft of the transmission, so the detection device itself is not an air cylinder. It can be produced separately, and if the interlocking members are connected by a screw mechanism,
The interlocking member can be attached by adjusting its position to achieve the most appropriate correspondence between the small magnet and the magnetically sensitive element, and further,
If the interlocking members are connected by a fitting connection mechanism, the detection device can be produced as a finished product separately from the air cylinder, which is convenient not only for production work but also for testing and adjustment.

[Brief explanation of drawings]

1 and 2 show one embodiment of the present invention, FIG. 1 is a longitudinal sectional side view of a detection device attached to an air cylinder, FIG. 2 is a sectional view taken along line A-A in FIG. 3 and 4 show other embodiments of the present invention, FIG. 3 is a vertical sectional side view of a detection device similar to FIG. 1, FIG. Fig. 5 is a perspective view of the detection device, Fig. 6 is a partial perspective view of the air cylinder, Fig. 7 is an enlarged plan view of the fitting and coupling mechanism, and Fig. 8 is a sectional view taken along line C-C in Fig. 7. , FIG. 9 is a block diagram showing a conventional example of a control device for a transmission. 4a...Select shaft, 4b...Screw hole, 4
d... Fitting hole, 11... Interlocking member, 12... Screw head, 12a... Flange, 13... Screw, 14... E ring, 15... Small magnet, 16 ...Fixed body, 19a
, 19b, 19C... Magnetic sensing element, 22... Interlocking member, 22b... Expanded diameter head, 23... Ring body, 2
5...Small magnet. Fig. 5 Fig. 6 Fig. 7 Fig. 8 vIJ No. 9 FIIJ

Claims (3)

[Claims] (1) In a detection device included in a vehicle transmission unit that responds to an electrical command signal from an operating unit and for detecting whether or not the selection and shift of the transmission follow the command signal. The device includes an interlocking member that is detachably attached to a gear shifting shaft of a transmission, a magnetic element provided on the interlocking member, and a magnetic sensing element provided on a fixing portion of the device where the magnetic element faces at a variable position of the interlocking member. Detection device for vehicle transmission including. (2) A patent claim in which the interlocking member and the shift shaft are removably connected by a screw mechanism, and the screw mechanism is configured such that the connection position of the interlock member can be adjusted in the direction of movement of the shift shaft. A detection device for a vehicle transmission described in item (1). (3) An interlocking member provided with a magnetic element and movably provided within the device main body with one end protruding from a part of the device main body, and a fitting portion provided on the gear shifting shaft. A fitting connection part provided at one end of the interlocking member that is detachably connected to the interlocking member, and a magnetic sensing element provided at the device fixing part where the magnetic element faces at each variable position of the interlocking member. A detection device for a vehicle transmission according to scope (1).