JPH0611066A - Solenoid valve - Google Patents

Abstract

PURPOSE:To reassemble a solenoid valve so as to obtain original accuracy after overhauling the solenoid valve for maintenance, inspection, and the like by simple operation. CONSTITUTION:The valve case 36 of a solenoid valve 33 (34) is constituted of a second case 38 made of resin, a metallic frame plate 39, and bolts 35a detachably fastening together the second case 38 and the frame plate 39. A solenoid 52 and a magnetic plate 53 forming a magnetic circuit of the solenoid 52 are received in the second case 38. Projections 53a are formed on either one of the frame plate 39 or the magnetic plate 53, and recessed parts 39a to be detachably fitted to the projections 53a are formed on the other plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve used for allowing or stopping the supply of lubricating oil to an engine of a motorcycle.

[0002]

2. Description of the Related Art In a motorcycle, lubricating oil is usually supplied from an oil pump to the engine in order to lubricate the engine. In the above configuration, conventionally, a solenoid valve is provided in the oil passage from the oil pump to the engine, and the solenoid valve is repeatedly opened and closed at a pitch corresponding to the operating state of the engine.
There is a system in which an amount of lubricating oil suitable for the operating state of the engine is supplied. In the above case, if the supply amount of the lubricating oil to the engine becomes excessive or deficient, inconveniences such as white smoke and burning will occur. Therefore, the supply amount is required to be highly accurate. Also, since the power generation capacity of motorcycles is small,
The required power of the solenoid valve can be kept small, and therefore the solenoid valve is required to be as small as possible. For this reason, the fluid passage in the solenoid valve is made thin, and the solenoid valve is manufactured with extremely high precision.

[0003]

By the way, when dust clogging occurs in the fluid passage of the solenoid valve, it can be considered to disassemble and clean it. However, as described above, the solenoid valve is precise. Therefore, in reassembling this, the work for reproducing the original accuracy is extremely complicated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to the above situation, and after disassembling the solenoid valve for maintenance and inspection, the solenoid valve is reassembled so as to obtain the original accuracy. The purpose is to be able to do by simple work.

[0005]

In order to achieve the above object, the present invention is characterized in that a valve case, a resin case, a metal frame plate, and the case and the frame plate are detached from each other. A solenoid valve that is configured by a fastener that can be fastened, and in which a solenoid and a magnetic plate that forms a magnetic circuit of the solenoid are housed in the case, and a protrusion is provided on one of the frame plate and the magnetic plate. Is formed, and a concave portion is formed on the other plate so as to be removably fitted into the protrusion.

[0006]

[Operation] The operation of the above configuration is as follows. The terms in parentheses below correspond to the terms in the claims. The valve cases 36 of the solenoid valves 33, 34 are a resin second case (case) 38, a metal frame plate 39, and these second cases (case) 3
8 and the frame plate 39 are detachably fastened to each other by a bolt (fastener) 35a, and the second case (case) 38 has a solenoid 52 and the solenoid 5
A magnetic plate 53 for forming a magnetic circuit of No. 2 is housed therein, and a protrusion 53a is formed on one of the frame plate 39 and the magnetic plate 53, and the protrusion 53a can be freely inserted into and removed from the other plate. A recess 39a for fitting is formed. For this reason,
When the solenoid valves 33 and 34 are disassembled for maintenance and the like and then reassembled, the second case (case) 38 is fitted while the recess 39a and the protrusion 53a are fitted to each other. The frame plate 39 and the frame plate 39 may be assembled together. In this way, the second case (case) 3
8 and the frame plate 39 are automatically positioned relative to each other, and the original precision is reproduced.

Further, in the above reassembly, the recess 39a and the projection 53a which enable the second case (case) 38 and the frame plate 39 to be positioned relative to each other are provided by utilizing the components of the solenoid valves 33 and 34. It is a thing. Therefore, it is possible to prevent the number of parts from increasing when the above positioning is possible. Moreover, the recess 39a and the projection 53a that fit together are formed on the metal frame plate 39 and the magnetic plate 53, and therefore wear is suppressed even if the fitting and removal of the both are repeated.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIGS. 1 to 6 show a first embodiment.
In FIG. 2, reference numeral 1 is a motorcycle that is a saddle-ride type vehicle, and an arrow Fr in the figure indicates the front side thereof, and the left and right described below are the directions toward the front side. A front wheel 4 and a handle 5 are supported on a front portion of a body frame 2 of the motorcycle 1 via a front fork 3, and a rear wheel 8 is supported on a rear portion thereof via a rear arm 7. A seat 9 is attached to the upper surface of the rear portion of the vehicle body frame 2 of the above.

1 to 3, an engine 11 is supported on the body frame 2 and the engine 1
1 drives the rear wheel 8. The engine 11 is a pre-compression type two-cycle two-cylinder engine and has a crankcase 12
And a left cylinder 13 that projects from the crankcase 12 toward the front upper side, and a right cylinder 14 that projects from the crankcase 12 toward the front lower direction.

An intake port is formed on the rear side of the crankcase 12 corresponding to the left cylinder 13, and a reed valve, an intake pipe 16a, and a left carburetor 16 are formed in the intake port.
Are lined up. On the other hand, an intake port is formed above the crankcase 12 corresponding to the right cylinder 14, and a reed valve, an intake pipe 17a, and a right carburetor 17 are connected to the intake port. Further, 18 is a spark plug, 19 is a fuel tank, 20 is an exhaust pipe, 24 is an air cleaner for the right cylinder 14, and this air cleaner 24
Is attached to the body frame 2 and / or the crankcase 12 side.

When the engine 11 is operated, the outside air 21 is sucked into the crankcase 12 through the left carburetor 16, the right carburetor 17, and the reed valves in order. The fuel from the fuel tank 19 is mixed with the outside air 21 through the left carburetor 16 and the right carburetor 17, and the mixture is precompressed in the crankcase 12 and then in the left cylinder 13 and the right cylinder 14. Is used for combustion.

2 and 4, a lubricating oil supply device 23 for supplying the lubricating oil 22 is provided in the engine 11. This lubricating oil supply device 23 has a reciprocating oil pump 25, and this oil pump 25 is a crankcase 1
2 is detachably screwed to the right side wall. The oil pump 25 is driven by the engine 11 so as to be synchronized with the rotation speed of the engine 11, that is, the oil pump 25 discharges the lubricating oil 22 in an amount corresponding to the rotation speed of the engine 11.

A lubricating oil 2 is provided on the rear portion of the vehicle body frame 2.
An oil tank 26 for storing 2 is supported, and the lubricating oil 22 in the oil tank 26 is supplied to the oil pump 25 through an oil supply pipe 27. The oil supply pipe 27 is made of a flexible resin tube. An oil filter 28 is provided in the middle of the oil supply pipe 27,
The oil filter 28 prevents foreign matter such as dust from flowing into the oil pump 25.

A first oil pipe 30 and a second oil pipe 31, which are oil passages for guiding the lubricating oil 22 discharged from the oil pump 25 into the crankcase 12 of the engine 11, are provided.
Both the first oil pipe 30 and the second oil pipe 31 are made of flexible resin tubes.

The first oil pipe 30 and the second oil pipe 31 are upstream pipes 30a, 31a on the oil pump 25 side, respectively.
And the downstream side pipes 30b, 3 on the side of the intake pipes 16a, 17a
1b. A first solenoid valve 33 and a second solenoid valve 34 are respectively interposed between these divided ends, and these solenoid valves 33, 34 are both arranged at a position lower than the oil tank 26. The first solenoid valve 33 and the second solenoid valve 34 can open and close the first oil pipe 30 and the second oil pipe 31, respectively.
The lubricating oil supply port 30c of the first oil pipe 30, which is the end portion on the engine 11 side, communicates with the inside of the intake pipe 16a corresponding to the left cylinder 13, while the lubricating oil supply port 31c of the second oil pipe 31 is , Intake pipe 17a corresponding to the right cylinder 14
It communicates with the inside.

In the above case, as shown in FIGS. 1 and 2,
The first solenoid valve 33 and the second solenoid valve 34 are
A bracket 35 attached to the cleaner case of the air cleaner 24 is detachably screwed with a bolt 35a. Although not shown, the first and second
A damper is provided between the solenoid valves 33, 34 and the air cleaner 24.

The first solenoid valve 33 and the second solenoid valve 34 will be described in detail with reference to FIGS. 1, 5, and 6. Since both of them have the same shape and size, the first solenoid valve 33 will be mainly described, and the second solenoid valve 34 will be described in parentheses. The first solenoid valve 33 (second solenoid valve 3
4) has a valve case 36. The valve case 36 includes a resin-made flat plate-shaped first case 37 and the first case 3
And a cylindrical second case 38 located below 7,
A frame plate 39, which is made of a rigid metal and is a magnetic body, is interposed between the first case 37 and the second case 38. The first case 37, the second case 38, and the frame plate 39 are detachably fastened by the bolts 35a that are fasteners.

A lubricating oil inlet 40 and a lubricating oil return port 41 are formed in the first case 37. On the other hand, in the second case 38, a cylindrical core 38a is inserted on the axis thereof. The core 38a is made of metal and is a magnetic body.
A lubricating oil outlet 42 is formed on the axis of the lower end of the core 38a. An oil passage 43 that connects the lubricating oil inlet 40 and the lubricating oil return port 41 to the lubricating oil outlet 42 is
The first case 37, the frame plate 39, the second case 3
8 and the core 38a are sequentially formed on the respective axes.

In the oil passage 43, the first case 37,
A valve element 45 is vertically movably fitted into a communication portion 44 that connects the frame plate 39 and the second case 38. The communication portion 44 is circular in plan view. The valve body 45 is composed of a valve main body 46 which is fitted in the communication portion 44 so as to be vertically slidable and has a substantially square shape in plan view, and an elastic valve body 47 attached to the valve main body 46. In the above case, an extremely narrow gap (air gap) is formed between the inner peripheral surface of the communicating portion 44 and the outer surface of each corner portion of the valve body 46, which allows the valve body 46 to move toward the communicating portion 44. Positioned accurately. And the communication part 4
4 and the outer surfaces of the sides of the valve body 46, four narrow passages 44a of the same shape and size are formed in the lubricating oil inlet 4
0 and the lubricating oil return port 41 serve as a passage for the lubricating oil 22 toward the lubricating oil outlet 42. The valve body 46 is a magnetic body made of metal, and the elastic valve body 47 is made of rubber. Also,
A spring 48 for urging the valve body 45 upward is provided.

Between the second case 38 and the core 38a, a resin bobbin 51, a solenoid 52 externally fitted to the bobbin 51, and a bottom portion of a substantially U-shape fitted externally to the lower portion of the core 38a. And a magnetic plate 53 having a shape of a circle. The magnetic plate 53 is made of metal, and together with the frame plate 39,
The magnetic circuit of the solenoid 52 is made.

The core 38 with respect to the inside of the second case 38
The accommodation of the a, the bobbin 51, the solenoid 52, and the magnetic plate 53 is performed by molding the resin, which is a raw material of the second case 38, by thermoplasticizing the resin.

In FIGS. 1, 5, and 6, the frame plate 39 has a recess 39 formed by a pair of through holes.
a and 39a are formed. On the other hand, each upper end of the magnetic plate 53 projects from the upper surface of the second case 38, and these serve as protrusions 53a and 53a. The recesses 39a, 39a and the protrusions 53a, 53a are fitted into each other in close contact with each other so that they can be freely inserted and removed.

In FIGS. 5 and 6, the first case 37 is formed.
A pair of columnar locking protrusions 54, 54 are integrally provided on the lower surface of the. On the other hand, the frame plate 39 is formed with a pair of circular locking holes 55, 55. The locking projections 54, 54 and the locking holes 55, 55 are fitted into each other so as to be in close contact with each other so that they can be freely fitted and removed.

By the above fittings, the first case 37, the second case 38, and the frame plate 39 are positioned with high precision. That is, when the first case 37, the second case 38, and the frame plate 39 are assembled or reassembled, the fitting allows the first solenoid valve 33 (second solenoid valve 34) to be precisely assembled. ing. In the above case, the locking protrusion 5
4, 54 and the locking holes 55, 55 are provided at unequal distances from the axis of the first solenoid valve 33 (second solenoid valve 34), respectively, and the first case 37 and the frame plate 39. It is taken into consideration that no mistake will be made in the assembly of. The recesses 39a and the projections 53a, and the locking projections 54 and the locking holes 55 described above may be mounted at the opposite mounting positions.

In FIGS. 1, 5 and 6, the solenoid 52 is de-energized and is turned off (OF).
Then, the valve body 45 moves upward due to the urging of the spring 48. Then, as shown in FIGS. 1 and 5, the upper end surface of the elastic valve body 47 is in pressure contact with the opening edge of the lubricating oil return port 41 on the lower surface of the first case 37. As a result, the oil passage 43
Through which the lubricating oil inlet 40 communicates with the lubricating oil outlet 42, and at the same time, the lubricating oil return port 41 and the lubricating oil inlet 40 and the oil passage 43 are blocked. That is, the first solenoid valve 33 (second solenoid valve 34) is opened.

On the other hand, when the solenoid 52 is energized and turned on, the valve body 46 is pulled to the solenoid 52 side together with the elastic valve body 47 against the spring 48 and moves downward. . Then, the lower end surface of the elastic valve body 47 comes into pressure contact with the opening edge of the oil passage 43 on the upper surface of the core 38a. As a result, the lubricating oil inlet 40 and the oil passage 43 are shut off, and at the same time, the lubricating oil inlet 40 and the lubricating oil return port 41 are connected.
Communicates with. That is, the first solenoid valve 33 (second solenoid valve 34) is closed.

By the way, as described above, in the first solenoid valve 33 (second solenoid valve 34), the first case 37, the second case 38, and the frame plate 39 are accurately assembled with each other. 52
Therefore, the magnetic circuit of is accurately formed for the valve element 45. Therefore, the size of the extremely narrow gap between the inner peripheral surface of the frame plate 39 and the outer surface of each corner portion of the valve body 46 is determined by the opening / closing operation of the first solenoid valve 33 (second solenoid valve 34). During the process, they are kept approximately the same size. As a result, the valve element 45 smoothly moves up and down without hitting the inner peripheral surface of the communicating portion 44, and operates quickly in response to the bias of the spring 48 and the energization of the solenoid 52. Therefore, high precision is ensured in supplying and stopping the lubricating oil 22.

Further, in the communication portion 44, the space between the inner surface of the communication portion 44 and the outer surface of the valve element 45 is reduced within a range that does not hinder the flow of the lubricating oil 22 so that the excess space is as small as possible. There is. Therefore, for example, due to the negative pressure fluctuations in the pulsating intake pipes 16a and 17a in the low opening range to the middle opening range of the left and right carburetors 16 and 17, the lubricating oil 22 in the surplus space is transferred into the engine 11. It is possible to suppress the wasteful supply of a large amount.

A check valve 56, which is an opening / closing valve, is provided at each of the lubricating oil outlets 42 of the first and second solenoid valves 33, 34.
The respective check valves 56 are directly and detachably screwed, and the check valves 56 are integrally provided on the first and second solenoid valves 33 and 34. That is, the check valve 56 has a valve main body 57 which is detachably screwed to the lubricating oil outlet 42, and an oil passage 58 communicating with the lubricating oil outlet 42 is formed in the valve main body 57. Also, this oil passage 58
Is provided with a ball 59 that can be opened and closed, and the ball 59 is biased by a spring 60 in a direction of closing the oil passage 58. Then, when the oil pressure of the lubricating oil 22 on the lubricating oil outlet 42 side exceeds a predetermined value, the lubricating oil 22 pushes the ball 59 against the spring 60 and opens the oil passage 58.

In FIGS. 1, 4 and 5, the lubricating oil inlet 40 is connected to the upstream pipe 30a (upstream pipe 31a) of the first oil pipe 30 (second oil pipe 31), and the lubricating oil outlet is provided. 42 via the above-described check valve 56, the same as above. Downstream side pipe 30b of the first oil pipe 30 (second oil pipe 31) (downstream side pipe 3
1b) are connected.

An oil return passage 61 extending from the respective lubricating oil return ports 41, 41 of the first solenoid valve 33 and the second solenoid valve 34 toward the suction side of the oil pump 25.
Is provided. The oil return passage 61 has a first return pipe 62 and a second return pipe 63 extending from the respective lubricating oil return ports 41, 41, and the respective extension ends thereof are T-shaped joints 6.
Merged at 5. Also, this T-shaped joint 6
A merging return pipe 66 extends from 5, and a return port 66a, which is the extended end, is connected to the upper portion of the oil tank 26.

In the above case, a Y-shaped joint may be used instead of the T-shaped joint 65. In this case, the Y-shaped joint is inverted, the extended ends of the return pipes 62 and 63 are connected to the left and right lower ends thereof, respectively, and the merge return pipe 66 is connected to the upper end of the Y-shaped joint. By doing so, the lubricating oil 22 flowing through the respective return pipes 62, 63
Flow rates are substantially the same as each other, and the Y-shaped joint smoothly joins, so that the pressure loss of the lubricating oil 22 can be small.

1, 4, and 5, when the solenoids 52 of the first solenoid valve 33 and the second solenoid valve 34 are turned off in the operating state of the engine 11, based on FIG. 4 and FIG. As described above, the lubricating oil inlets 40 of the first solenoid valve 33 and the second solenoid valve 34 are opened toward the lubricating oil outlet 42, while the lubricating oil return ports 41 are closed. Then, the lubricating oil 22 discharged from the oil pump 25 interlocking with the engine 11 is supplied to the upstream pipes 30 of the first oil pipe 30 and the second oil pipe 31.
After being supplied to the lubricating oil inlet 40 through a and 31a, it flows to the lubricating oil outlet 42 side as shown by an arrow A in FIGS. 1 and 5. Then, this lubricating oil 22 causes the ball 59 to
To open the oil passage 58, and the first oil pipe 30 and the second oil pipe 31
The lubricating oil 22 flows into the engine 11 through the downstream pipes 30b and 31b toward the inside of the engine 11, and is supplied to the engine 11 together with the air-fuel mixture for lubrication.

On the other hand, when the solenoids 52 are turned on, the lubricating oil inlet 40 and the lubricating oil outlet 42 are disconnected from each other as described above, while the lubricating oil inlet 40 is opened toward the lubricating oil return port 41. Be done. Then, the oil pump 25
The lubricating oil 22 supplied from the lubricating oil inlet 40 to the lubricating oil inlet 40 flows to the lubricating oil return port 41 as indicated by an arrow B in FIGS. 1 and 5.
Then, the lubricating oil 22 passes through the first return pipe 62, the second return pipe 63, and the merging return pipe 66, and then passes through the oil tank 26.
Returned to.

Electronic control means for controlling the opening / closing operation of the first solenoid valve 33 and the second solenoid valve 34 is provided. That is, by this control means, each solenoid 5 of the first solenoid valve 33 and the second solenoid valve 34 is
2 are automatically turned off and on repeatedly in synchronization with each other, and the first solenoid valve 33 and the second solenoid valve 3
4 opens and closes as described above, so that the lubricating oil 22 discharged from the oil pump 25 becomes
1 and the inside of the oil tank 26 are alternately guided. At this time, the first solenoid valve 33 and the second solenoid valve
Each off period of the solenoid 52 of the solenoid valve 34 is constant. On the other hand, the length of each ON period of each solenoid 52 is adjusted based on the rotational speed of the engine 11, each throttle opening of the left carburetor 16 and the right carburetor 17, the temperature of the lubricating oil 22, and the like. As a result, the amount of lubricating oil 22 commensurate with each operating state of the engine 11
Is being supplied with high precision.

When the engine 11 is stopped, the oil pump 25 is also stopped. At this time, since the pressure of the lubricating oil 22 in the lubricating oil outlet 42 decreases, the ball 59 in the check valve 56 is biased by the spring 60 to close the oil passage 58, that is, the first oil pipe 30 and the second oil pipe. Close 31. For this reason, when the motorcycle 1 is left for a long time with the engine 11 stopped, the lubricating oil 22 in the oil tank 26 is temporarily changed to the solenoid valves 33, 34.
The check valve 56 prevents the lubricating oil 22 from entering the engine 11 through the first and second oil pipes 30 and 31 even if it leaks to the downstream side thereof. Therefore, it is prevented that the spark plug 18 gets wet with the lubricating oil 22, the consumption of the lubricating oil 22 is prevented from becoming excessive, and the startability of the engine 11 is kept good.

In FIG. 1, an air vent hole 68 for opening the upper end of the oil passage 43 to the upper side of the first case 37 is formed in the upper part of each first case 37 of the first solenoid valve 33 and the second solenoid valve 34. Has been done. Further, a bolt-like plug 69 that closes the air vent hole 68 in a freely openable and closable manner is screwed into the air vent hole 68. And the first
The solenoid valve 33 and the second solenoid valve 34 are connected to the engine 1
The plug 69, which is used when it is installed in 1 or for repair, etc.
The valve case 3 by loosening and opening the air vent hole 68.
The air inside 6 can be easily removed. The air vent hole 68 and the plug 69 may be omitted.

In FIGS. 1, 2, and 4, as described above, the oil pump 25, the first solenoid valve 33, and the second solenoid valve 34 are all provided on the right side, which is either the left side or the right side of the engine 11. , Are close to each other. Therefore, the first and second oil pipes 30 and 31 from the oil pump 25 to the solenoid valves 33 and 34 need only be short, and air bubbles are generated in the lubricating oil 22 of the first and second oil pipes 30 and 31. Even if it exists, the existing amount is suppressed to a small amount, and the volume fluctuation due to the fluctuation of the hydraulic pressure in each of the first and second oil pipes 30 and 31 is suppressed to be small.

Further, since the volumes of the first and second oil pipes 30 and 31 are small, when the first and second oil pipes 30 and 31 are deformed and their volumes are changed due to the pressure fluctuation in this portion,
This volume change can be suppressed small. In this way, the opening / closing operation of each solenoid valve 33, 34 is made to correspond in time to the discharge of the lubricating oil 22 of the oil pump 25, and the accuracy of the supply amount of the lubricating oil 22 to the engine 11 is improved. It is being improved.

In the above case, each solenoid valve 33,
Lubricating oil outlets 38 of the first oil pipe 30 and the second oil pipe 31 of the lubricating oil supply port 30 of the engine 11.
c and 31c are provided at higher positions. Therefore, when the motorcycle 1 is left for a long time while the engine 11 is stopped, even if the lubricating oil 22 leaks from the solenoid valves 33 and 34, the lubricating oil 22 will not be absorbed by the first oil pipe 30 or the second oil pipe 30. It is prevented that the oil pipe 31 enters the engine 11 through the respective lubricating oil supply ports 30c and 31c. In this way, excessive consumption of the lubricating oil 22 is prevented. Further, the lubricating oil 22 is prevented from getting wet with the spark plug 18, and the startability of the engine 11 is kept good.

Further, as described above, each solenoid valve 3
When the first and second oil pipes 30 and 31 are closed by 3, 34, the oil pump 25 is connected to the solenoid valves 3 of the same as above.
The lubricating oil 22 supplied to the lubricating oil inlets 37 of the oil tanks 3, 34 is returned to the oil tank 26 through the lubricating oil return port 41, and the lubricating oil return port 41 is connected to the solenoid valves 33, 34. Is disposed at the upper end of the.

Therefore, even if air enters the lubricating oil 22 until it is supplied to the engine 11, the air in the lubricating oil 22 rises due to its buoyancy at the solenoid valves 33 and 34, and these solenoids 33 and 34 rise. The lubricating oil return port 41 at the upper ends of the valves 33 and 34 is reached. Therefore, when the lubricating oil 22 is returned to the oil tank 26, the lubricating oil 22 returns to the oil tank 26 together with the air that has reached the lubricating oil return port 41, where the air flows from the lubricating oil 22. To be separated. That is, even if air enters the lubricating oil 22 as described above, it is separated when returned to the oil tank 26, so that the lubricating oil 22 supplied to the engine 11 through the solenoid valves 33 and 34 is separated. The accuracy of the supply amount of is kept good.

As described above, the oil pump 25 and the solenoid valves 33 and 34 are both attached to the engine 11 side. In this case, since the engine 11 has high rigidity, the oil pump 25, the solenoid valves 33 and 34, and the first and second solenoids that connect them are connected.
The mutual assembly accuracy of the oil pipes 30 and 31 is improved. Further, since the oil pump 25 and the solenoid valves 33 and 34 can be integrally mounted on the engine 11 on the vehicle body frame 2 side of the motorcycle 1, the lubricating oil supply device 23 can be assembled. Workability is also improved.

In FIG. 4, the return port 66a of the merging return pipe 66 opening to the oil tank 26 is the oil tank 2
It is arranged on the upper part of 6. That is, this return port 66a
Is located above the liquid level of the lubricating oil 22 in the oil tank 26. Therefore, when the oil pump 25 stops due to the stop of the engine 11, the lubricating oil 22 in the oil tank 26 flows back to the first solenoid valve 33 or the second solenoid valve 34 side through the merge return pipe 66. It is prevented from trying, that is, trying to get into the engine 11 is prevented.

The oil pump 25, the first solenoid valve 33, and the second solenoid valve 34 are the engine 1
It may be provided on the left side of 1. Further, the return port 66a of the merge return pipe 66 may be connected to the bottom of the oil tank 26,
In FIG. 4, as indicated by reference numeral 56a ', the oil filter 2
8 may be connected to the middle part of the same, and in FIG.
As shown by a ″, it may be connected to the oil supply pipe 27 upstream of the oil filter 28. However, the lubricating oil 22 returned from each solenoid valve 33, 34 is filtered by the oil filter 28 in any case. After the oil pump 2
It is supposed to be sent to 5. The open / close valve exemplified as the check valve 56 may be opened / closed by an actuator such as a solenoid.

(Second Embodiment) FIG. 7 shows a second embodiment. According to this, the check valve 56 is not provided at each lubricating oil outlet 42 of the first solenoid valve 33 and the second solenoid valve 34. On the other hand, a check valve 56 'having the same structure as the check valve 56 of the above embodiment is provided at the upstream ends of the upstream pipes 30a, 31a of the first oil pipe 30 and the second oil pipe 31, respectively.

Further, another check valve 56 'for opening and closing the oil return passage 61 is provided. When the engine 11 is in the operating state, the check valves 56 ', 56' open the first and second oil pipes 30, 31 and the oil return passage 61, and when the engine 11 is in the stopped state. Same as above, the first and second oil pipes 30 and 31 and the oil return passage 61 are closed.

Therefore, when the engine 11 is stopped,
The pressure of the lubricating oil 22 in the oil tank 26 is
Solenoid valve 3 through oil pipes 30, 31 and oil return passage 61
The check valve 5 may be added to 3, 34.
Blocked by 6 '. Therefore, the pressure of the lubricating oil 22 does not promote the leakage of the solenoid valves 33 and 34, and in this case also, the oil tank 2
The lubricating oil 22 in 6 and the oil return passage 61 is prevented from entering the engine 11. Other configurations and operations are similar to those of the first embodiment. Therefore, common reference numerals are given to the drawings and the description thereof is omitted.

(Third Embodiment) FIG. 8 shows a third embodiment. According to this, the first and second solenoid valves 33, 34
Check valves 56 'and 56' are provided between the first and second return pipes 62 and 63, respectively. By the way, in FIG. 7, the respective solenoids 52 of the first solenoid valve 33 and the second solenoid valve 34 are turned on, and the lubricating oil 22 discharged from the oil pump 25 is transferred to the first return pipe 62 and the second return pipe 63. When returning to the oil tank 26 through the oil return passage 61 such as the above, a pressure difference usually occurs between the lubricating oil 22 in the first return pipe 62 and the second return pipe 63. In this case, the pressure is transmitted from one side of the first and second solenoid valves 33 and 34 to the other side through the first and second return pipes 62 and 63, so that the flow rate accuracy of each solenoid valve 33, 34 decreases. May occur.

Therefore, as described above, the check valves 56 'and 56' are provided between the first and second solenoid valves 33 and 34 and the first and second return pipes 62 and 63, respectively. Therefore, the first and second solenoid valves 33, 34 are
Attempt to transmit pressure from one side to the other side is suppressed by the check valves 56 'and 56', and a predetermined flow rate accuracy is ensured in the first and second solenoid valves.

The check valves 56, 56 'are
The first and second solenoid valves 33, 34 are provided immediately downstream of the lubricating oil return port 41. That is,
In FIG. 7, check valves 56 'and 56' are provided in the same manner as the check valves 56 are integrally provided to the first and second solenoid valves 33 and 34. For this reason, the check valves 5 from the first and second solenoid valves 33 and 34 are
Between 6'and 56 ', the first and second resin tubes
Since the return pipes 62 and 63 do not exist, a predetermined flow rate accuracy is secured without being affected by hose expansion due to the pressure of the lubricating oil 22.

On the other hand, other oil filters 71, 71 are provided in the middle of the upstream pipes 30a, 31a of the first and second oil pipes 30, 31, respectively. These other oil filters 71, 71 prevent the inflow of foreign matters such as dust into the first and second solenoid valves 33, 34, and thereby the accurate operation of the first and second solenoid valves 33, 34 can be performed. Reserved.

The mesh of the elements of each of the other oil filters 71 is rougher than that of the oil filter 28. By the way, the oil filter 28 can be provided in a wide space in relation to other vehicle components, and therefore, the filtering area of the oil filter 28 can be made sufficiently large.

On the other hand, the oil pump 25 and the first and second
The solenoid valves 33 and 34 are close to each other because it is necessary to arrange each device compactly. Therefore, the upstream side pipes 3 of the first and second oil pipes 30 and 31 connecting these
The length of 0a and 31a cannot be taken sufficiently. Therefore, the filtration area of each of the other oil filters 71 provided in the upstream pipes 30a and 31a cannot be made sufficiently large, so that the oil filters 71 are small in size.

As a result, when the elements of the oil filter 28 and the other oil filter 71 are made to have meshes of substantially the same size, other oil filters are different from those of the oil filter 28 during the period when each element is clogged. 71 is shorter. Therefore, as described above, the mesh of the elements of each of the other oil filters 71 is roughened to prevent clogging so that the clogging period is almost the same as that of the oil filter 28. .

Other configurations and operations are the same as those in the second embodiment. Therefore, the same reference numerals are given to the drawings, and the description thereof will be omitted. The provision of the other oil filter 71 and the relationship between the oil filter 71 and the elements of the oil filter 71 may be applied to the first or second embodiment.

[0057]

According to the present invention, the valve case of the solenoid valve is constituted by the resin case, the metal frame plate, and the fasteners for detachably fastening the case and the frame plate to each other. A solenoid and a magnetic plate for forming a magnetic circuit of the solenoid are housed in the case, a protrusion is formed on one of the frame plate and the magnetic plate, and the protrusion can be freely inserted into and removed from the other plate. A recess for fitting is formed. For this reason, when disassembling the solenoid valve for maintenance and the like and then reassembling it, it is sufficient to assemble the case and the frame plate while fitting the recess and the protrusion with each other. In this way, the case and the frame plate are automatically positioned with respect to each other, and the original accuracy is reproduced.

Therefore, in reassembling the solenoid valve, the work of reproducing the original accuracy can be performed by a simple work of assembling the case and the frame plate while fitting the recesses and the projections with each other. Also,
In the above reassembly, the recess and the projection that enable the case and the frame plate to be positioned with respect to each other are provided by using the components of the solenoid valve. Is prevented from increasing, and thus the solenoid valve described above can have a simple structure. Moreover, since the recesses and the protrusions that fit with each other are both formed on the metal frame plate and the magnetic plate, wear can be suppressed to a small amount even if these both are repeatedly fitted and removed. Therefore, even if the solenoid valve is repeatedly disassembled and reassembled, the desired accuracy is ensured each time.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a solenoid according to a first embodiment.

FIG. 2 is an overall side view of the motorcycle according to the first embodiment.

FIG. 3 is a front view of the motorcycle according to the first embodiment.

FIG. 4 is a partially enlarged view of FIG. 2 in the first embodiment.

FIG. 5 is a vertical cross-sectional view of Example 1 at a position displaced by 90 ° in plan view.

6 is a sectional view taken along line 6-6 of FIG. 1 in Embodiment 1. FIG.

FIG. 7 is a diagram corresponding to FIG. 4 in the second embodiment.

FIG. 8 is a diagram corresponding to FIG. 4 in the third embodiment.

[Description of Reference Signs] 33 first solenoid valve (solenoid valve) 34 second solenoid valve (solenoid valve) 35a bolt (fastener) 36 valve case 38 second case (case) 39 frame plate 39a recess 52 solenoid 53 magnetic plate 53a Protrusion

Claims (1)

[Claims] 1. A valve case comprising a resin case, a metal frame plate, and a fastener for removably fastening the case and the frame plate to each other, wherein the case has a solenoid and a solenoid of the solenoid. In a solenoid valve accommodating a magnetic plate that forms a magnetic circuit, a protrusion is formed on one of the frame plate and the magnetic plate, and a recess is formed on the other plate so that the protrusion can be fitted into and removed from the frame plate. Formed solenoid valve.