JP2004028189A - Transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an accident such as a short circuit caused by contamination (iron powder). <P>SOLUTION: A transmission 1 provides a body unit 3 in a mission case. The unitized body unit 3 is comprised of a wire layout circuit 4 formed by bending a rigid wire 10 in a designated wiring pattern, a base member 5 providing the wire layout circuit 4 on the whole surface and mounting electronic components such as ROM20 etc., and a cover 6 fixed on the base member 5 so as to cover the wire layout circuit 4 mounted on the base member 5. A coil magnet 35 is provided on the base member 5. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a transmission, and relates to a technique suitable for an automatic transmission in which a continuously variable transmission is switched.
[0002]
[Prior art]
This type of conventional transmission includes one end of an input shaft, one end of an output shaft, a gear mechanism for changing the rotation of the input shaft to a desired number of revolutions and transmitting the rotation to the output shaft, Electronic components such as sensors necessary for controlling the gear mechanism, a board for holding a part of these electronic components, a wire harness for transmitting signals between the electronic components and transmitting signals to the outside, A transmission case in which these parts are housed and lubricating oil to be supplied to the speed change gear mechanism is stored below an internal space.
[0003]
The conventional transmission assembling work involves individually housing various electronic components, boards, and wire harnesses at predetermined positions in a transmission case, and connecting a connector of the wire harness to the housed electronic components for electrical connection. Need to do. Therefore, there is a problem that the operation of housing the components in the transmission case is troublesome, and the operation of electrically connecting the wiring harness is troublesome.
[0004]
In order to solve such a problem, the present applicant has developed a wire routing circuit formed by bending a rigid wire into a predetermined routing pattern, and a wire routing circuit formed on one side. And a base unit on which the electronic component is mounted and a cover fixed to the base member while covering the wire routing circuit body disposed on the base member. And a transmission that places this main unit in the transmission case was developed.
[0005]
In this transmission, the main body unit is configured by disposing the wire routing circuit body at a predetermined position on the base member, mounting the electronic component on the predetermined position on the base member, and fixing the cover to the base member. Since the unitized main unit is housed in the mission case, the work of housing the parts is reduced, and since the wiring route to the electronic component, the branch circuit, and the like are formed by the wire routing circuit body, they are arranged in the mission case. The number of wire harnesses is reduced. As described above, the work of housing components in the transmission case and the work of electrical connection can be facilitated.
[0006]
By the way, when the transmission is driven, the lubricating oil stored below in the transmission case is supplied to the transmission gear mechanism by gear rotation of the transmission gear mechanism (not shown) or the like, and the lubrication oil thus supplied is supplied. The oil is scattered by the gear rotation of the transmission gear mechanism, etc., and the scattered lubricating oil gradually returns downward by its own weight and is returned to the lower portion of the transmission case again. Circulate.
[0007]
[Problems to be solved by the invention]
In the lubricating oil circulating in the transmission case, contamination (iron powder) due to gears, conductive wire slag, and the like is inevitable. If the contamination (iron powder) mixed in the lubricating oil circulates in the transmission case together with the lubricating oil, the contamination (iron powder) may cause a short circuit in a wire routing circuit or the like.
[0008]
Then, this invention is made in order to solve the said subject, and an object of this invention is to provide the transmission which can prevent the short-circuit accident by contamination (iron powder) as much as possible.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a wire routing circuit formed by processing a rigid wire into a predetermined routing pattern, and the wire routing circuit is disposed on one surface, and an electronic component is mounted. And a cover fixed to the base member in a state of covering the wire routing circuit body disposed on the base member. , Wherein the main unit is provided with a magnet.
[0010]
In this transmission, when lubricating oil circulating in the transmission case flows around the magnet, contamination (iron powder) in the lubricating oil is attracted to the magnet by magnetic force, and the amount of contamination (iron powder) in the lubricating oil is mixed. Is reduced.
[0011]
The invention according to claim 2 is the transmission according to claim 1, wherein the magnet is an electromagnet.
[0012]
In this transmission, the same effect as the first aspect of the invention can be obtained by adsorbing contamination (iron powder) by the electromagnet.
[0013]
The invention according to claim 3 is the transmission according to claim 1, wherein the magnet is a permanent magnet.
[0014]
In this transmission, the same operation as the first aspect of the invention can be obtained by adsorbing contamination (iron powder) by the permanent magnet.
[0015]
The invention according to claim 4 is the transmission according to any one of claims 1 to 3, wherein the magnet is provided on a base member of the main unit.
[0016]
In this transmission, in addition to the effects of the first to third aspects of the present invention, contamination (iron powder) in the lubricating oil flowing around the wire routing circuit can be absorbed.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0018]
1 to 10 show an embodiment of the present invention. FIG. 1 is a side view of a transmission 1, FIG. 2 is an exploded perspective view of a main unit 3, FIG. 3 is a perspective view of an assembled state of the main unit 3, and FIG. 4A is a side view of the wire routing circuit body 4, FIG. 4B is an enlarged view of a main part of a portion formed as the connector terminal 10b of the wire 10, and FIG. FIG. 6 is a further enlarged perspective view of FIG. 5, FIG. 7 is an inner view of the cover 6, FIG. 8 is a sectional view showing an arrangement state of the wire routing circuit body 4, and FIG. FIG. 9B is a plan view showing a welded state of the lead wire 26 of the rotation sensor 23, FIG. 9B is a side view showing a welded state of the lead wire 26 of the rotation sensor 23, and FIG. FIG. 10B is a plan view showing a welded state of the lead wire 27 of the hydraulic pressure sensor 24. It is a side view showing a welded state.
[0019]
As shown in FIG. 1, the transmission 1 has a transmission case 2 in which the inside is kept in a sealed state, and a lubricating oil (not shown) is accommodated below the inside, and an input shaft ( One end of an output shaft (not shown), a transmission gear mechanism (not shown) for changing the rotation of the input shaft to a desired rotation speed, and transmitting the rotation to the output shaft. A main unit 3 on which electronic parts and circuits such as sensors necessary for controlling the speed change gear mechanism (not shown) are mounted, and wires for electrically connecting the main unit 3 to an external circuit. The harness WH (shown in FIG. 5) is accommodated.
[0020]
As shown in FIGS. 2 and 3, the main body unit 3 includes a wire routing circuit body 4 in which a desired circuit is formed by a predetermined routing pattern, and the wire routing circuit body 4 is disposed on an upper surface. A base member 5, a cover 6 fixed to the base member 5 while covering the wire routing circuit body 4 disposed on the base member 5, and a control valve upper 7 fixed to the lower surface of the base member 5 Have.
[0021]
The wire routing circuit body 4 is formed by bending a plurality of conductive and rigid wires 10 into a predetermined routing pattern. Specifically, a wiring path to an electronic component, a branch circuit, and the like are formed. The wire 10 of this embodiment is a square wire having a square cross section, and the square wire is processed into high-density wiring by an automatic wire bending device. An end of a part of the wire 10 of the wire routing circuit body 4 is bent upward, and each of the solenoid valve terminals 11 is welded to each of the upper bent portions. The wire routing circuit body 4 has one main ground wire 10a, and a solenoid valve ground terminal 12 is welded to an appropriate position of the main ground wire 10a. Further, as shown in detail in FIGS. 4 (a) and 4 (b), an end of a part of the wire 10 of the wire routing circuit body 4 is bent downward and its tip is tapered. Thereby, it is formed as a male connector terminal 10b.
[0022]
The base member 5 has a flat flat shape made of an insulator, and has a wire housing groove 15 having partition walls 14 on both sides in the short direction on the upper surface thereof. The wire rod accommodating groove 15 has a pattern shape substantially corresponding to the wire rod arranging pattern of the wire rod arranging circuit body 4. As shown in detail in FIG. Have been. The wire rod accommodating groove 15 is formed in a three-dimensional manner so as to have a partly different height, so that the wire rods 10 of the wire rod routing circuit body 4 that cross each other do not come into contact with each other.
[0023]
2 and 3, the base member 5 is provided with connector hood portions 16 at two locations by integral molding. Each connector hood portion 16 extends downward from the base member 5, and each connector terminal 10 b of the wire routing circuit body 4 is arranged in the connector hood portion 16. That is, the connector 17 on the main unit 3 side is constituted by the connector hood portion 16 and the connector terminal 10b of the wire routing circuit body 4. The connector 17 has a built-in male terminal because the connector terminal 10b is formed using the end of the wire 10 and, as shown in FIG. 5, the connector 17 includes a connector 18 of a wire harness WH. They are connected via a relay connector 19. That is, since the connector 18 of the wire harness WH has a built-in male terminal, the two connectors 17 and 18 are connected via the relay connector 19 having the built-in female terminal and the female terminal.
[0024]
As shown in detail in FIGS. 5 and 6, a coil magnet 35 which is an electromagnet is provided at two places on the upper surface of the base member 5, and this coil magnet 35 is provided only with a coil 35a (shown in FIG. 6). Is wound. The coil magnet 35 is connected to a predetermined wire 10 of the wire routing circuit 4 by welding or the like, and the coil magnet 35 is wired so that a predetermined current flows from the wire routing circuit 4. The arrangement position of the coil magnet 35 is set in the main unit 3 so as to be a position that serves as a lubricating oil circulation path.
[0025]
The base member 5 is equipped with a ROM 20 as electronic components, eight solenoid valves 21, six hydraulic switches 22 (shown in FIG. 1), a rotation sensor 23, an oil temperature sensor 24, and the like. The ROM (read only memory) 20 is fixed to the base member 5 by screwing, and its lead terminal 20 a is welded to an end of a predetermined wire 10. Each solenoid valve 21 has a terminal insertion hole (not shown) on the lower surface side, and is mounted on the base member 5 by inserting the solenoid valve terminal 11 and the solenoid valve ground terminal 12 into the terminal insertion hole. ing. Each hydraulic switch 22 is mounted on the lower surface side of the base member 5 via a plate 25 (shown in FIG. 1) and the like. The rotation sensor 23 is fixed to the base member 5 by bolts (not shown) and nuts (not shown), and its lead wire 26 is welded to the welded portion 10c of the wire 10 of the wire routing circuit body 4. It is connected. The detailed welding structure will be described below. The oil temperature sensor 24 is fixed to a member other than the base member 5, and its lead wire 27 is connected to the welded portion 10 c of the wire 10 of the wire routing circuit body 4 by welding. The detailed welding structure will be described below.
[0026]
As shown in FIGS. 2 and 3, the cover 6 has a shape that covers substantially the entire upper surface of the base member 5 with an insulator. On the inner surface (lower surface) of the cover 6, as shown in FIG. 7, a groove closing protrusion 28 having a pattern shape substantially corresponding to the wire routing pattern of the wire routing circuit body 4 is provided. As shown in detail in FIG. 8, the groove closing protrusion 28 enters the wire housing groove 15 of the base member 4 to block the entrance portion in the wire housing groove 15, and the lower surface thereof is housed in the wire housing groove 15. It is almost in contact with the upper surface of each wire 10 of the wire routing circuit body 4.
[0027]
Next, the welding structure of the lead wires 26 and 27 of the rotation sensor 23 and the oil temperature sensor 24 will be described. As shown in FIGS. 9A and 9B, each lead wire (electric wire) 26 of the rotation sensor 23 has the outer periphery of the conductive wire 26a covered with an insulating outer skin 26b. Each of the lead wires 26 has the insulating outer skin 26b peeled at an intermediate location, not at the tip end, and the inner conductive wire 26a is exposed at the intermediate location. The intermediate portion where the conductive wire 26a is exposed and the welded portion 10c of the wire 10 of the wire routing circuit body 4 are connected by welding.
[0028]
As shown in FIGS. 10A and 10B, each lead wire (electric wire) 27 of the oil temperature sensor 24 has the outer periphery of the conductive wire 27a covered with an insulating sheath 27b. Each of the lead wires 27 is peeled at an intermediate portion, not at a tip end thereof, of an insulating outer cover 27b, and an inner conductive wire 27a is exposed. Then, the intermediate portion where the conductive wire 27a is exposed and the welded portion 10c of the predetermined wire 10 of the wire routing circuit body 4 are connected by welding.
[0029]
Next, the operation of assembling the main unit 3 configured as described above and the operation of housing the assembled main unit 3 in the transmission case 3 will be described. First, the wire routing circuit 4 is accommodated in the wire receiving groove 15 from above the base member 5, whereby the wire routing circuit 4 is set at a predetermined position on the base member 5. In this setting, the connector terminal 10b of the wire routing circuit body 4 is inserted into the connector hood portion 16 of the base member 5, whereby the connector 17 is configured.
[0030]
Next, a solenoid valve terminal 11 and a solenoid valve ground terminal 12 are connected to ends of a predetermined wire 10 of the wire routing circuit body 4 by welding, and a ROM 20, a hydraulic switch 22 (shown in FIG. 1), The rotation sensor 23, the oil temperature sensor 24, and the like are mounted at predetermined positions on the base member 5. Here, the lead wires 26 and 27 of the rotation sensor 23 and the oil temperature sensor 24 and the ends of the predetermined wires 10 of the wire routing circuit body 4 are welded as described above. The coil magnet 35 is also connected to a predetermined wire 10 of the wire routing circuit body 4 by welding or the like, and is disposed at a predetermined position on the base member 5.
[0031]
Next, the cover 6 is put on the upper surface of the base member 5, and the base member 5 and the cover 6 are fixed. Eight sets of solenoid valve terminals 11 and solenoid valve ground terminals 12 protrude from the cover 6 on the base member 5 covered with the cover 6. , The solenoid valves 21 are respectively mounted. The assembly of the main unit 3 is completed, and the unitized main unit 3 is housed at a predetermined position in the transmission case 2 (see FIG. 1).
[0032]
In the above-described configuration, when the transmission 1 is driven, the lubricating oil accommodated below the transmission case 2 is supplied to the transmission gear mechanism by rotation of a gear of a transmission gear mechanism (not shown) or the like. The lubricating oil is scattered by gear rotation of the transmission gear mechanism or the like. The scattered lubricating oil gradually returns downward by its own weight and is returned to the lower portion of the transmission case 2 again, and circulates in the transmission case 2 by repeating such operations. In the lubricating oil circulation process, a part of the lubricating oil scattered in the transmission case 2 adheres to the main body unit 3, and the holes of the cover 6 and the cover 6 and the base member 5 are separated from the outer surface of the main body unit 3. Into the main unit 3 through the gap. When the lubricating oil that has entered flows around the coil magnet 35, contamination (iron powder) in the lubricating oil is attracted to the coil magnet 35 by magnetic force. As a result, the amount of contamination (iron powder) in the lubricating oil is reduced, so that a short circuit accident due to contamination (iron powder) can be prevented as much as possible.
[0033]
In this embodiment, since the coil magnet 35 is provided on the base member 5 of the main body unit 3, it is possible to adsorb contaminants (iron powder) in the lubricating oil flowing around the wire routing circuit body 4. This is effective for preventing a short circuit accident in the wiring circuit 4. The energization of the coil magnet 35 can be easily performed by connecting the coil magnet 35 to the wire routing circuit 4 arranged on the same base member 5.
[0034]
In particular, since the amount of contamination (iron powder) in the lubricating oil flowing around the wire routing circuit body 4 is reduced, it is effective in preventing a short circuit accident in the wire routing circuit body 4.
[0035]
In this embodiment, the magnet is constituted by a coil magnet (electromagnet) 35 around which only the coil 35a is wound, but may be constituted by an electromagnet provided with an iron core in the internal space of the coil 35a. Further, it may be constituted by a permanent magnet.
[0036]
In this embodiment, the base member 5 is provided with a wire receiving groove 15 having a pattern shape substantially corresponding to the wire routing pattern of the wire routing circuit body 4 and having partition walls 14 on both side surfaces. Since the wire routing circuit body 4 is accommodated in the accommodation groove 15, the partition wall portion 14 is interposed between the wires 10 arranged in close proximity, so that the wire routing circuit body 4 is densely routed. In this case, the possibility of short-circuiting due to contamination (iron powder) or the like can be reduced. That is, since the outer circumference of the wire routing circuit body 4 is covered with the base member 5 and the cover 6, the lubricating oil scattered in the transmission case 2 does not directly adhere to the wire routing circuit body 4, When lubricating oil (not shown) enters between the base member 5 and the cover 6 and contaminants (iron powder) in the entered lubricating oil adhere to the wire routing circuit 4, the contaminants (iron powder) are interposed. In this embodiment, since the adjacent wires 10 may be short-circuited, in this embodiment, since the closely-arranged wires 10 are partitioned by the partition 14, the short-circuit due to contamination (iron powder) or the like in the lubricating oil that has entered. The possibility can be reduced.
[0037]
In this embodiment, the cover 6 is provided with a groove closing projection 28 having a pattern shape substantially corresponding to the wire routing pattern of the wire routing circuit body 4. Is blocked, so that contamination (iron powder) or the like is prevented from entering into the wire rod accommodation groove 15 from the entrance of the wire rod accommodation groove 15 of the base member 5, and the wire rod routing circuit body 4 is routed with high density. In such a case, a short circuit due to contamination (iron powder) or the like can be reliably prevented.
[0038]
In this embodiment, the conductive wires 26a and 27a are exposed by peeling the middle portions of the lead wires 26 and 27 covered with the insulating outer covers 26b and 27b, and the conductive wires 26a and 27a are exposed. Since the intermediate portion 27 is welded to the wire 10 of the wire routing circuit body 4, the conductive wires 26a and 27a of the lead wires 26 and 27 are not easily frayed, and the residue of the conductive wires 26a and 27a due to the fray is mixed into the lubricating oil. Therefore, a short circuit due to the residue of the conductive wires 26a and 27a can be prevented.
[0039]
【The invention's effect】
As described above, according to the first aspect of the present invention, a wire rod routing circuit body formed by bending a rigid wire rod into a predetermined routing pattern, and the wire rod routing circuit body are formed on one surface. A main body unit is formed into a unit by the disposed base member and a cover fixed to the base member while covering the wire routing circuit body disposed on the base member. The magnet is provided in the main unit, so that when the lubricating oil circulating in the transmission case flows around the magnet, the contamination (iron powder) in the lubricating oil is adsorbed by the magnet, Since the amount of contamination (iron powder) in the lubricating oil is reduced, a short-circuit accident due to contamination (iron powder) can be prevented as much as possible.
[0040]
According to the second aspect of the present invention, in the transmission according to the first aspect, since the magnet is an electromagnet, the same effect as that of the first aspect is obtained by adsorbing contamination (iron powder) by the electromagnet. Can be
[0041]
According to the third aspect of the present invention, in the transmission according to the first aspect, since the magnet is a permanent magnet, the same effect as that of the first aspect is obtained by adsorbing contamination (iron powder) by the permanent magnet. Is obtained.
[0042]
According to the fourth aspect of the present invention, in the transmission according to the first to third aspects, the magnet is provided on the base member of the main body unit. Since it is possible to adsorb the contamination (iron powder) in the lubricating oil flowing around the wire routing circuit, it is effective in preventing a short circuit accident in the wire routing circuit. When the magnet is an electromagnet, wiring can be easily performed so as to receive power from the wire routing circuit.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention and is a side view of a transmission.
FIG. 2 is an exploded perspective view of the main unit, showing one embodiment of the present invention.
FIG. 3 is a perspective view showing an embodiment of the present invention, in a state where a main unit is assembled.
FIGS. 4A and 4B show an embodiment of the present invention, in which FIG. 4A is a side view of a wire routing circuit body, and FIG. 4B is an enlarged view of a main part of a portion formed as a connector terminal of the wire.
FIG. 5 shows an embodiment of the present invention, and is an enlarged perspective view of a place where a coil magnet of a base member is arranged.
FIG. 6 shows an embodiment of the present invention and is a further enlarged perspective view of FIG. 5;
FIG. 7 shows an embodiment of the present invention and is an inner view of a cover.
FIG. 8 is a cross-sectional view showing an embodiment of the present invention and showing an arrangement state of a wire routing circuit body.
9A and 9B show an embodiment of the present invention, in which FIG. 9A is a plan view showing a welding state of a lead wire of a rotation sensor, and FIG. 9B is a side view showing a welding state of a lead wire of the rotation sensor.
10A and 10B show one embodiment of the present invention, in which FIG. 9A is a plan view showing a welded state of a lead wire of a hydraulic sensor, and FIG. 9B is a side view showing a welded state of a lead wire of a hydraulic sensor. .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Transmission 2 Transmission case 3 Main unit 4 Wire rod routing circuit body 5 Base member 6 Cover 10 Wire rod 20 ROM (electronic parts)
21 Solenoid valve (electronic parts)
22 Hydraulic switch (electronic parts)
23 Rotation sensor (electronic parts)
24 Oil temperature sensor (electronic parts)
35 Coil magnet (electromagnet, magnet)

Claims (4)

A wire routing circuit body formed by processing a rigid wire into a predetermined routing pattern, a base member on which the wire routing circuit body is arranged on one surface, and on which an electronic component is mounted; A transmission is a transmission in which a main unit is formed by a cover fixed to the base member while covering the wire routing circuit body disposed on the base member, and the main unit is disposed in a transmission case. hand,
A transmission, wherein the body unit is provided with a magnet. The transmission according to claim 1,
The transmission, wherein the magnet is an electromagnet. The transmission according to claim 1,
The transmission, wherein the magnet is a permanent magnet. The transmission according to claim 1, wherein:
The transmission, wherein the magnet is provided on a base member of the main unit.

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