JP5776878B2 - Fluid-filled valve device - Google Patents

Description

  The present invention relates to a fluid-filled valve device for filling a closed fluid circuit with a fluid, and more particularly, to a stabilizer control device capable of suppressing rolling motion of a vehicle by a stabilizer bar supported between left and right wheels before and after the vehicle. It relates to a suitable fluid-filled valve device.

  As a device for suppressing rolling motion of a vehicle, a stabilizer control device in which a torsion bar is disposed between left and right wheels of the vehicle is generally known, and the torsion bar is called a stabilizer bar. According to this, when a relative displacement difference is generated in the suspension stroke between the left and right wheels, it acts as a torsion spring and can suppress the rolling motion of the vehicle. A configuration of a stable stabilizer control device is disclosed. These devices include an accumulator that maintains a fluid at a predetermined pressure, but do not include a fluid pressure source, and are configured by a closed fluid circuit. A normally closed fluid-filled valve device is provided.

  For example, in paragraph [0025] of Patent Document 1, “the communication passage 30 is provided with sealing plugs 51 and 52, through which the inside of the communication passage 30 and thus the pressure chambers C1a, C1b, C2a, and C2b. The system oil is enclosed as a pressurized fluid pressurized to a predetermined pressure.These sealing plugs 51 and 52 are held in the closed position except when the oil is changed after the system oil is filled. As described, a sealing plug is provided as a fluid sealing valve device. In addition, the device described in Patent Document 2 is provided with a normally closed shut-off valve (indicated by CV in FIG. 5 of the present application, which will be described later) that is generally in a communicating state when fluid is filled, A filling valve for fluid filling (indicated by FV in FIG. 5 of the present application) is provided. In addition, since the filling valve is the same as that which is commercially available and generally used, the description thereof will be omitted, but the pressure resistance design that can resist the fluid pressure in the fluid circuit is not necessarily made. The above shut-off valve is required separately.

  Similarly, in Patent Document 3 below, the paragraph [0024] states that “the oil supply port unit 23 is connected to an oil supply machine (not shown) via a cock 23a and a coupler 23b. As shown in FIG. 2 of Patent Document 3, the cock 23a shown in FIG. 2 corresponds to the shut-off valve (cut valve), and the coupler 23b It corresponds to the above filling valve. When these cocks 23a and couplers 23b are expressed in a specific configuration, they correspond to the shut-off valve CV and the filling valve FV shown in FIG. 6 of the present application, respectively, and are configured by two parts and arranged individually. Become.

JP 2007-137153 A JP 2009-274597 A JP 2005-67560 A

  As described above, since all of the devices described in Patent Documents 1 to 3 are configured by a closed fluid circuit that does not include a fluid pressure source, when assembling a vehicle or replacing parts in the market, The fluid circuit is configured to be filled with fluid from an external facility (fluid supply source). For this reason, a sealing plug is provided in Patent Document 1 and a shut-off valve and a filling valve are provided, which are omitted in Patent Document 2, but a filling valve (coupler for fluid filling) is disclosed in Patent Document 3. A shut-off valve (cock 23a) is disposed on the downstream side (cylinder side) so that the fluid pressure in the apparatus is not directly applied to 23b). Thus, since the filling valve and the shutoff valve are provided independently, they are large. In particular, regarding the filling valve used only for fluid filling, the arrangement and configuration must be taken into consideration, making it difficult to reduce the size and cost of the device.

  SUMMARY OF THE INVENTION The present invention relates to a fluid-filled valve device for filling a closed fluid circuit in a stabilizer control device or the like with a small and inexpensive structure.

In order to achieve the above object, the present invention is a fluid-filled valve device for filling a closed fluid circuit with fluid, and is in communication with the fluid circuit when the fluid circuit is filled with fluid. A normally closed shut-off valve, and a fluid sealing unit that is provided integrally with the shut-off valve and that fills the fluid circuit through the shut-off valve when the shut-off valve is in communication. In the valve device, the supply passage communicating with the fluid circuit is provided, and the shut-off valve includes a valve body disposed so as to be seated so as to close the supply passage, and when the valve body is separated, the supply passage is provided. A valve chamber that communicates with the fluid circuit via the valve chamber, the filling valve is joined to the shut-off valve so as to communicate with the valve chamber, and the fluid is supplied from the filling valve to the supply path via the valve chamber. It is comprised so that it can be filled .

  Furthermore, an accumulator is provided which is interposed in the fluid circuit and communicates with the valve chamber, and the fluid circuit and the accumulator communicate with each other via the valve chamber when the valve body is separated from the supply path. It may be configured to do so.

Since this invention is comprised as mentioned above, there exist the following effects. That is, in the fluid-filled valve device of the present invention, the filling valve required when filling the fluid into the closed fluid circuit is disposed integrally with the shutoff valve, and has a supply path that communicates with the fluid circuit. The shut-off valve has a valve body disposed so as to be seated so as to close the supply path, and has a valve chamber communicating with the fluid circuit via the supply path when the valve body is separated from the valve path, Since the filling valve is joined to the shut-off valve so as to communicate with the valve, and the fluid can be filled from the filling valve to the supply path via the valve chamber, the apparatus can be made small and inexpensive.

It is sectional drawing which shows the fluid sealing valve apparatus which concerns on one Embodiment of this invention. It is sectional drawing which shows the fluid sealing valve apparatus which concerns on other embodiment of this invention. It is sectional drawing which shows the stabilizer control apparatus provided with the fluid sealing valve apparatus which concerns on other embodiment of this invention. It is a block diagram which shows the structure of a general stabilizer control apparatus. It is a perspective view which shows the whole structure of a general stabilizer control apparatus. It is sectional drawing of the conventional cutoff valve and filling valve with which a stabilizer control apparatus is provided.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, the structure of a general stabilizer control device and a conventional shut-off valve and filling valve provided for it will be described with reference to FIGS. 4, 5, and 6. FIG. In FIG. 5, both ends of a front wheel side stabilizer bar FS are supported by wheels FL and FR on the left and right front sides of the vehicle, and intermediate portions thereof are supported at two left and right support portions on a vehicle body (not shown) via mounts FM1 and FM2. Supported. In the present embodiment, a front wheel side cylinder FC is interposed between the left mount FM1 which is one of these support portions and the vehicle body. Similarly, both ends of the rear wheel side stabilizer bar RS are supported by the left and right rear wheels RL and RR of the vehicle, and an intermediate portion thereof is supported at two left and right support portions on the vehicle body (not shown) via mounts RM1 and RM2. Supported. A rear wheel side cylinder RC is interposed between the same left mount RM1 as the front wheel side cylinder FC and the vehicle body. The front wheel side cylinder FC and the rear wheel side cylinder RC are connected in communication with a control valve device (mechanical control valve) MV, and the control valve device MV is connected in communication with an accumulator ACC.

  The configuration including the front wheel side cylinder FC, the rear wheel side cylinder RC, and the control valve device MV and the mutual connection relationship are shown in FIG. 4, and the front wheel side cylinder FC is connected to the front wheel side stabilizer bar FS (mount FM1 in FIG. 5). A first piston P1 supporting one end, and a pressure chamber U1 on the upper side of the vehicle and a pressure chamber L1 on the lower side of the vehicle via the first piston P1 to be supported on the vehicle body (not shown). 1 housing H1. Similarly, the rear wheel side cylinder RC has a second piston P2 that supports one end of the rear wheel side stabilizer bar RS (via the mount RM1 in FIG. 5) and a second piston P2 on the vehicle upper side via the second piston P2. It has a second housing H2 that forms a pressure chamber U2 and a pressure chamber L2 on the lower side of the vehicle and is supported by a vehicle body (not shown). Then, the pressure chamber U1 and the pressure chamber U2 on the upper side of the vehicle are connected to each other by the upper side communication path UP, and the pressure chamber L1 and the pressure chamber L2 on the lower side of the vehicle are connected to each other by the lower side communication path LP and are closed. A fluid circuit is configured.

  A relief valve RV is interposed between the upper communication path UP and the lower communication path LP, and the upper and lower communication paths UP and LP are always cut off. When the pressure on the side becomes greater than the pressure on the accumulator ACC (communication passage AB) side by a predetermined pressure or more, the communication state is established. Further, the control valve device MV intermittently controls the communication between the upper communication path UP and the lower communication path LP, which will be described later.

  Further, as shown in FIG. 4, bypass flow paths BU and BL that bypass the relief valve RV and the control valve device MV and connect the upper communication path UP and the lower communication path LP and the communication path AB of the accumulator ACC. These bypass channels BU and BL include the control valve device MV and the annular channels BM and BR of the relief valve RV shown in FIG. A shutoff valve (cut valve) CV is interposed in each of the bypass channels BU and BL. The shutoff valve CV is normally shut off, and when the fluid is filled by an external fluid supply source (not shown), for example, from the upper communication path UP and the lower communication path LP side, the bypass flow path BU or BL and When the accumulator ACC is filled with fluid via the communication path AB, the communication state is established. The bleeder BD discharges air in the fluid circuit when the fluid is filled, and the pressure sensor P detects pressure in the fluid circuit.

  As shown in FIG. 5, each of the upper communication path UP and the lower communication path LP is provided with, for example, a shutoff valve CV and a filling valve FV having the structure shown in FIG. 6. These correspond to the cock 23a and the coupler 23b shown in the above-mentioned Patent Document 3, respectively, so that the fluid pressure in the apparatus is not directly applied to the filling valve FV (above-mentioned) A shutoff valve CV is disposed on the fluid circuit side.

  In general, in order to fill the closed fluid circuit as described above with a fluid, for example, the filling valve FV and the shutoff valve CV shown in FIG. 6 are necessary. As shown in FIG. 1, a small and lightweight fluid-filled valve device 1 is configured. That is, the housing 2 shown in FIG. 1 is interposed in the closed fluid circuit FP (for example, the upper communication passage UP or the lower communication passage LP shown in FIGS. 4 and 5), and the shutoff valve 10 is screwed into the housing 2. The filling valve 20 for filling the fluid circuit FP with the fluid via the shut-off valve 10 when the shut-off valve 10 is in communication is integrally provided, and the fluid-filled valve device 1 is It is configured.

  The housing 2 is provided with a supply path 2a communicating with the fluid circuit FP. The valve body 11 of the shutoff valve 10 is disposed so as to be closed so as to close the supply path 2a, and the valve body 11 is separated. Sometimes a valve chamber 12 is formed which communicates with the fluid circuit FP via the supply path 2a. The valve body 11 is formed with a horizontal hole 11a and a vertical hole 11b, and a filling valve 20 is joined so as to communicate with the valve chamber 12 through the horizontal hole 11a and the vertical hole 11b. Thus, when fluid is supplied to the filling valve 20 from an external fluid supply source (not shown), the fluid circuit FP passes through the horizontal hole 11a and the vertical hole 11b of the shutoff valve 10, the valve chamber 12, and the supply path 2a. The inside is filled with fluid. Although FIG. 1 shows a communication state in which the shut-off valve 10 is in the open position, the valve body 11 is normally seated on the supply path 2a (except when fluid is filled), and the normally-close shut-off valve 10 is configured. The supply path 2a is closed.

  FIG. 2 shows a fluid-filled valve device according to another embodiment of the present invention, which can be used for the stabilizer control device shown in FIG. 3 (and FIG. 4). In the embodiment of FIG. 2, in addition to the supply path 2a connected to the upper communication path UP or the lower communication path LP (bypass flow path BU or BL), the accumulator ACC (communication path AB) is connected. However, since the shutoff valve 10 and the filling valve 20 are substantially the same as the structure shown in FIG. 1, the same reference numerals are given and detailed description thereof is omitted. The shut-off valve 10 shown in FIG. 2 is in the open position in a communicating state as in FIG. 1, and when fluid is supplied to the filling valve 20 from an external fluid supply source (not shown), the side holes 11a of the shut-off valve 10 and The upper side communication path UP, the lower side communication path LP, and the accumulator ACC are filled with fluid through the vertical hole 11b, the valve chamber 12, and the supply paths 2a and 2b.

  After filling, as shown in FIG. 3, the valve body 11 is seated on the supply path 2a, the supply path 2a is closed, and the communication with the supply path 2b is blocked. The supply path 2b is always in communication with the valve chamber 12, the horizontal hole 11a, and the vertical hole 11b, but these are closed by the filling valve 20. As a result, the fluid pressure in the supply passage 2 b is applied to the filling valve 20, but this is the pressure on the accumulator ACC side, which is less than the pressure resistance of the filling valve 20. But you may comprise so that communication with the supply path 2b may be interrupted | blocked by the side wall surface of the valve body 11 at the time of obstruction | occlusion of the supply path 2a.

  Next, the operation of the stabilizer control device shown in FIG. 3 (and FIG. 4) will be described. The control valve device MV intermittently controls the communication between the upper communication passage UP and the lower communication passage LP. When in the neutral position shown in FIG. 4, the upper communication passage UP (pressure chamber U1 and pressure chamber U2), the lower communication passage LP (pressure chamber L1 and pressure chamber L2), and the accumulator ACC are connected via the control valve device MV. The fluid is communicated and filled with a fluid pressurized to a predetermined pressure. That is, FIG. 4 shows the pressure in the pressure chamber U1 and the pressure chamber U2 on the upper side of the vehicle (referred to as Pu), the pressure in the pressure chamber L1 and the pressure chamber L2 on the lower side of the vehicle (referred to as Pl), and the inside of the accumulator ACC. This is a state (Pu = Pa = Pl) when pressures (Pa) are equal.

  From this state, when the pressure in the pressure chamber U1 and the pressure chamber U2 on the vehicle upper side becomes the high pressure side and the relationship of Pu> Pa> Pl is established, the upper communication path UP (the pressure chamber U1 and the pressure chamber U2), the lower side Communication between the communication path LP (the pressure chamber L1 and the pressure chamber L2) and the accumulator ACC is blocked. On the contrary, when the pressure in the pressure chamber L1 and the pressure chamber L2 on the vehicle lower side becomes the high pressure side and the relationship of Pu <Pa <Pl is established, the upper side communication path UP (the pressure chamber U1 and the pressure chamber is increased by the control valve device MV). U2), the lower communication path LP (pressure chamber L1 and pressure chamber L2) and the accumulator ACC are mutually disconnected. As described above, when the pressure in the first pressure chamber C1 and the pressure in the second pressure chamber C2 are different, the upper communication passage UP, the lower communication passage LP, and the accumulator ACC are mutually communicated by the control valve device MV. Blocked. Thus, when the vehicle turns, the pressure in the first pressure chamber C1 and the pressure in the second pressure chamber C2 are different, and the upper communication passage UP and the lower communication passage LP are controlled by the control valve device MV. And the accumulator ACC are not connected to each other, and fluid movement in the upper communication path UP and the lower communication path LP does not occur. Therefore, the front wheel side stabilizer bar FS and the rear wheel side stabilizer bar RS have the respective stabilizer functions. This can suppress the rolling motion of the vehicle body.

  On the other hand, when the vehicle (not shown) is traveling straight and moves up and down substantially parallel to the road surface, the upper communication path UP, the lower communication path LP, and the accumulator ACC are controlled by the control valve. The fluid can be freely moved through the device MV, and the thermal expansion and contraction of the fluid is appropriately absorbed by the accumulator ACC. At this time, the front wheel side stabilizer bar FS and the rear wheel side stabilizer bar RS are not restrained by the front wheel side cylinder FC and the rear wheel side cylinder RC, and do not exhibit the stabilizer function. Further, when the vertical movements of the pistons P1 and P2 of the front wheel side cylinder FC and the rear wheel side cylinder RC are different before and after the vehicle when traveling on a rough road, the fluid moves in the upper communication path UP and the lower communication path LP. The front wheel side stabilizer bar FS and the rear wheel side stabilizer bar RS ensure a large stroke for each wheel without exhibiting the stabilizer function.

DESCRIPTION OF SYMBOLS 1 Fluid sealing valve apparatus 2 Housing 2a, 2b Supply path 10 Shut off valve 20 Filling valve FS Front wheel side stabilizer bar RS Rear wheel side stabilizer bar FC Front wheel side cylinder RC Rear wheel side cylinder H1, H2 Housing FP Fluid circuit UP Upper side communication path LP Lower side communication path ACC Accumulator C1 First pressure chamber C2 Second pressure chamber MV Control valve device RV Relief valve CV Shut-off valve FV Filling valve

Claims (2)

A fluid-filled valve device for filling a fluid into a closed fluid circuit, the normally-closed shut-off valve interposed in the fluid circuit and in communication with the fluid circuit when the fluid is filled, and the shut-off valve In a fluid-filled valve device that is integrally provided and includes a filling valve that fills the fluid circuit with fluid through the shut-off valve when the shut-off valve is in communication, a supply path that communicates with the fluid circuit And the shutoff valve includes a valve body disposed so as to be seated so as to close the supply passage, and a valve chamber communicating with the fluid circuit through the supply passage when the valve body is separated from the valve body. The filling valve is joined to the shut-off valve so as to communicate with the valve chamber, and the fluid can be filled from the filling valve to the supply path via the valve chamber. Fluid-filled valve device. The accumulator is provided in the fluid circuit and communicated with the valve chamber, and the fluid circuit and the accumulator communicate with each other through the valve chamber when the valve body is separated from the supply path. The fluid-filled valve device according to claim 1.

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