JP4728134B2 - Rotary valve - Google Patents

Description

The present invention relates to an improvement of a solenoid valve holding structure , and more particularly to an improvement of a rotary damper having the solenoid valve and suitable for use in a steering mechanism in a two-wheeled vehicle.

In recent years, for example, in a steering mechanism in a motorcycle, the front wheel has a rotary damper and is caused by a front wheel runout in a traveling motorcycle, for example, a motorcycle being accelerated gets over a road surface protrusion. For example, Patent Document 1 discloses a proposal for suppressing the vibration of the motor with a rotary damper.

That is, the rotary damper disclosed in Patent Document 1 has, for example, two oil chambers that are defined by vanes in the housing, that is, left and right oil chambers, and these two oil chambers supply hydraulic oil when the vanes swing. It is assumed that a predetermined damping action is expressed in the damping part through which the hydraulic oil passes at this time.

And in this rotary damper, it has a plurality of check valves, and a single damping part in which the hydraulic oil that passes through the flow path from one oil chamber toward the other oil chamber is in the flow path In addition, the flow direction of the hydraulic oil is adjusted so that it passes through a relief valve in parallel with the damping part, while the damping part is composed of a solenoid valve, and the generated damping force is controlled by controlling the current applied to the solenoid. It is going to change.

Therefore, in the rotary damper disclosed in Patent Document 1, for example, the housing is connected to the handle side of the motorcycle and the vane is connected to the vehicle body side of the motorcycle. Relative swinging between the steering wheel side and the vehicle body side can be appropriately suppressed.
JP 2004-231036 (paragraphs 0002 to 0005, 0025 to 0028, 00031, and 0035, FIGS. 1, 3, and 4 in the specification)

However, in the rotary damper disclosed in the above-mentioned Patent Document 1, it is pointed out that there is a minor problem in providing a solenoid valve as a damping part, although there is no inherent problem in the operation thereof. there is a possibility.

That is, in the above-described rotary damper, the solenoid valve as the damping portion is held in the housing, and at this time, it is assumed that it is held in the housing by so-called screwing.

Therefore, in the above-described rotary damper, when the vibration is input to the housing, there is a concern that the screwed state may be loosened, and in the case of actual loosening, the solenoid valve cannot perform the setting operation. Will be worried.

The present invention was devised in view of the above-described circumstances, and the object of the present invention is, of course, that it is possible to suppress the vibration of the front wheels in a traveling two-wheeled vehicle by a solenoid valve as a damping portion. Another object of the present invention is to provide a rotary damper capable of permanently guaranteeing a predetermined holding state of the solenoid valve in the housing.

In order to achieve the above-described object, the means of the present invention is configured to define two oil chambers in the valve block by vanes that are swingably accommodated in the valve block, and the two oil chambers are the vane. The hydraulic oil flows into and out of each other through the flow path when swinging, and a predetermined damping force is generated in the damping section disposed in the middle of the flow path. The damping section is provided adjacent to the outer periphery of the valve block. In a rotary damper comprising a solenoid valve having a solenoid valve having a cylindrical valve portion integrally connected to a lower portion of the solenoid portion, the valve portion being fitted into a round hole opened in the valve block. A pin member is held below the solenoid part, a receiving hole facing the pin member is formed in the valve block, and the pin member is fitted into the receiving hole, and the valve part is inserted into the valve part. An annular groove is formed along the direction, a shaft member is inserted into the valve block from a direction crossing the valve portion, and the shaft member is fitted in the annular groove in a tangential direction. A rotary valve characterized in that a wave washer is accommodated at the bottom of a hole so that the end of the valve is in contact with the wave washer.

In this case, the solenoid part has a case body formed in a headed cylinder shape in which the solenoid is accommodated, and the case body has a bracket body extending in the radial direction. Preferably, the body holds the base of the pin member.
Similarly, the valve portion has a through hole in the shaft core portion, and has a needle-like valve body in which a pointed tip is present in the opening in the through hole so that the wave washer has a central hole facing the through hole. Preferably, the central hole communicates with a flow path opened in the valve block.

According to the invention of each claim, the tip of the pin member whose base is held by the solenoid portion of the solenoid valve is fitted into the opening hole of the valve block so that the valve portion rotates within the round hole. You won't get.

The separation at this time, since the shaft member inserted into the valve block is fitted toward the tangential direction in the annular groove of the formed circumferentially on the outer periphery of the valve unit, the valve unit, i.e., the solenoid valve from the valve block It cannot be done, that is, it will not come out.

In addition, by installing a wave washer at the bottom of the round hole opened in the valve block, the urging force of the wave washer acts on the tip of the valve part in the round hole in the valve block. It comes to be pressed against the shaft member, and so-called play is prevented from occurring.

In the rotary damper having the solenoid valve described above, since the solenoid is fixed to the valve block as the housing and does not employ a screwing structure, it is necessary to form a screw portion when the screwing structure is used. A stroke is not required, and the overall size of the rotary damper can be reduced.

As a result, according to the present invention, in the solenoid valve, the holding state in the valve block can be permanently secured, and in the rotary damper, the runout of the front wheels in the two-wheeled vehicle traveling by the solenoid valve can be achieved. Can be suppressed.

Hereinafter, the present invention will be described based on the illustrated embodiment. In the illustrated embodiment, the holding structure of the solenoid valve is embodied in the rotary damper. Therefore, the rotary damper will be described below. However, the solenoid valve holding structure will also be described.

As shown in FIG. 1 which is a principle diagram, the rotary damper according to the present invention has two oils which are defined in the housing 1 by a vane 2 which is swingably accommodated in the housing 1 which is a valve block. When the two oil chambers R1 and R2 are made to flow into and out of each other through the flow paths L1 and L2 by the oscillation of the vane 2, the hydraulic oil is expanded. It is assumed that a predetermined damping force is generated by passing through a solenoid valve V that is a damping portion disposed in the flow path.

At this time, the rotary damper has a plurality of check valves for adjusting the flow direction of the hydraulic oil, as indicated by reference numerals C1, C2, C3, and C4 in the drawing, and two oil chambers R1, The hydraulic oil from R2 can pass through the flow path L1, L2 through the solenoid valve V that is a single damping portion and the relief valve Vr that is in parallel with the solenoid valve V.

Incidentally, the accumulator A is connected to the above-described flow path, and when the oil temperature rises and the hydraulic oil expands, the storage location for the expanded hydraulic oil is ensured. It is said.

Therefore, in the rotary damper according to the present invention formed as described above, when this is used, for example, in a steering mechanism in a motorcycle, the housing 1 is connected to the handle side in the motorcycle, for example. The vane 2 is connected to the vehicle body side of the motorcycle.

Under this state, when the mutual swinging between the handle side and the vehicle body side is expressed via the head pipe, the vane 2 swings in the housing 1, and at this time, the solenoid as the damping unit A damping force having a predetermined magnitude is generated by the valve V, and mutual swinging between the handle side and the vehicle body side via the head pipe is suppressed.

Incidentally, in the figure, the solenoid valve V that is a damping unit is configured to appropriately achieve the above control as the generated damping force can be adjusted by an external operation or the like, but the configuration that generates the damping force. For example, the vane 2 has an orifice that allows the two oil chambers R1 and R2 to communicate with each other, and the hydraulic oil passes through the orifice when the vane 2 swings. A predetermined damping force may be generated, or a damping force generation using a gap flow between the vane 2 and the housing 1 may be used.

Next, in the rotary damper formed as described above, as shown in FIG. 2, the solenoid valve V includes a solenoid portion 3 provided adjacent to the outer periphery of the housing 1 as a valve block, and the solenoid portion 3. The valve portion 4 is formed in a columnar shape with the base end continuously provided integrally therewith, and the valve portion 4 is fitted into the housing 1 in the open round hole 1a under the seal member S. Yes.

At this time, the housing 1 includes a box part that houses the vane 2 (see FIG. 1) and a cover part that is provided adjacent to the opening end of the box part and closes the opening of the box part. In many cases, the above-mentioned valve block will correspond to the valve block.

By the way, the solenoid valve V in this rotary damper, in which the valve portion 4 formed in a columnar shape is fitted into the round hole 1a opened in the housing 1, cannot be removed from the housing 1 and is not able to rotate. It is said that it is connected so as not to move, or to be rattling.

That is, the solenoid portion 3 of the solenoid valve V is integrally formed by holding the base portion of the pin member 5 as shown in the figure. Therefore, the valve portion 4 formed in a columnar shape is prevented from rotating in a state of being fitted in the round hole 1a opened in the housing 1.

Therefore, in the solenoid valve holding structure according to the present invention, it is essential that the solenoid portion 3 in the solenoid valve V has the pin member 5 described above. A free configuration may be selected for the structure held in the portion 3.

As shown in the figure, the solenoid portion 3 integrally has a so-called laterally extending bracket 3a, and the pin 5 is held by the bracket 3a .

Incidentally, when the solenoid part 3 has the bracket 3a, the bracket 3a holds a connector for connecting a lead wire for supplying power to the solenoid part 3, or the bracket 3a This is advantageous in that it can also serve as a connector.

The solenoid valve V has an annular groove 4a formed in the circumferential direction on the outer periphery of the valve portion 4. The annular groove 4a has a so-called housing 1 as shown in FIG. The shaft member 6 inserted from the lateral direction is fitted toward the tangential direction .

At this time, the annular groove 4a formed in the valve portion 4 is formed in a U-shaped cross section in which a so-called bottom cross-sectional shape is an arc shape, and the shaft member 6 is formed in a circular cross-sectional shape. Therefore, when the shaft member 6 is inserted into the housing 1, consideration is given so that it can be linked to the annular groove 4a without so-called obstacles.

Therefore, the valve portion 4 is not pulled out from the inside of the round hole 1a opened in the housing 1 by the shaft member 6 inserted into the housing 1, that is, is not separated from the housing 1. .

Incidentally, as disclosed in the above-mentioned patent document, when the valve portion 4 of the solenoid valve V is screwed into the housing 1 that is a valve block, the solenoid valve V is caused by vibration input to the housing 1. In the case of this invention, since the valve portion 4 is not screwed to the housing 1, there is a risk that the solenoid valve V may be loosened due to vibration input to the housing 1. I can say no.

The shaft member 6 that prevents the valve portion 4 from coming out of the round hole 1a is screwed into the housing 1, and most of vibration that will be input to the housing 1 is shown in FIG. Therefore, the shaft member 6 is loosened with respect to the housing 1, so that the shaft member 6 does not come out of the housing 1, and as a result, the valve portion 4 is round. You will not be afraid of getting out of the hole 1a.

Further, in this solenoid valve V, the valve portion 4 is fitted in the round hole 1a opened in the housing 1, and the above-described round member 1 is connected to the valve block 4 in a state where the above-described shaft member 6 is connected to the valve block 4. It is assumed that the wave washer 7 accommodated at the bottom of the hole 1a is adjacent to the tip of the valve portion 4 which is the lower end in FIG.

Therefore, the valve portion 4 is urged in the direction of being pulled out from the round hole 1a by the urging force from the wave washer 7. At this time, the valve portion 4 is urged to the shaft member 6 described above. Since the movement in the direction of coming out from the inside of the round hole 1a is prevented by the connection, the valve portion 4 is prevented from rattling in the round hole 1a.

As described above, in the solenoid valve holding structure according to the present invention, the fixing is realized in a state in which the valve portion 4 of the solenoid valve V is fitted in the open hole 1a in the housing 1 which is a valve block. Therefore, as compared with the conventional proposals disclosed in the above-mentioned patent documents, it is not necessary to open a screw hole, that is, a female screw, in the housing 1, and so-called component processing. It can be said that it will be advantageous.

In the solenoid valve holding structure according to the present invention, the shaft member 6 formed in a round bar shape is inserted into the housing 1 to prevent the solenoid valve V from coming out of the round hole 1a. Therefore, it is advantageous in terms of facilitating so-called assembly work as compared with the case where a so-called surface such as a key structure is required and an operation for aligning the surfaces is required.

In the above description, it has been described that the rotary damper embodying the solenoid valve holding structure according to the present invention is used for a steering mechanism in a motorcycle. However, according to the intention of the present invention, the above rotary damper is a bicycle. Of course, it may be used for the steering mechanism in the above, and the action and effect in that case are not different.

In the above description, the solenoid valve holding structure according to the present invention is embodied in the rotary damper. However, from the point of view of the present invention, the solenoid valve holding structure according to the present invention is approximately a valve block. Of course, the present invention may be embodied when a solenoid valve is disposed, and the operation and effect in that case are not different.

It is a circuit diagram which shows in principle the rotary damper by this invention. It is a partial front longitudinal cross-sectional view of the rotary damper by this invention . It is a partial plane cross-sectional view of the rotary damper by this invention .

1 Housing for valve block 1a Round hole 1b Receiving hole 2 Vane 3 Solenoid part
3a Bracket 4 Valve part
4a annular groove 5 pin member 6 shaft member 7 wave washer L1, L2 flow path R1, R2 oil chamber V solenoid valve as damping part

Claims (3)

Two oil chambers are defined in the valve block by vanes that are swingably accommodated in the valve block, and the two oil chambers flow into and out of each other through the flow path when the vanes swing. And a predetermined damping force is generated in the damping part disposed in the middle of the flow path, and the damping part is integrally connected to the solenoid part adjacent to the outer periphery of the valve block and the lower part of the solenoid part. A rotary damper formed by inserting the valve portion into a round hole opened in the valve block, and holding a pin member below the solenoid portion. A receiving hole facing the pin member is formed in the block, the pin member is fitted into the receiving hole, an annular groove is formed in the valve portion along the circumferential direction, and the valve block is formed. The shaft member is inserted from the direction crossing the valve portion into the hook, the shaft member is fitted in the annular groove in the tangential direction, and a wave washer is installed in the bottom of the round hole. A rotary valve characterized in that the end of the valve part is brought into contact. The solenoid part has a case body formed in a headed cylinder shape in which the solenoid is accommodated, and the case body has a bracket body extending in the radial direction. The rotary valve according to claim 1, wherein a base portion of the member is held . The valve portion has a through hole in the shaft core portion, and has a needle-like valve body in which the tip is made to be able to advance and retreat within the opening in the through hole, and the wave washer has a central hole facing the through hole. The rotary damper according to claim 2, wherein the central hole communicates with a flow path opened in the valve block .

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