TWM560535U - Speed selector valve - Google Patents

Abstract

A speed selector valve includes: a housing (12) including a first port (26) configured to be able to connect with a fluid actuator, and a second port (28) configured to be able to connect with an solenoid valve; a first throttle valve (14); a second throttle valve (16); a spool valve (18) configured to be able to switch between the first throttle valve (14) and the second throttle valve (16); an operation knob (20) integrally coupled to the spool valve (18); and a sensor (88) configured to detect a position of the spool valve (18).

Description

Speed selector valve

This authoring device is about a speed selector valve. In particular, the authoring apparatus relates to a speed selector valve that switches a fluid actuator between a high speed drive and a low speed drive.

Conventionally, the high/low speed control device of the actuator is known to switch the operating speed of the fluid actuator between high speed and low speed and to control the operation speed (refer to Japanese Laid-Open Patent Publication No. 2010-038337). The high/low speed control device switches the operating speed control valve from the normal high speed control position to the low speed control position when the switch directs the discharge fluid of the pilot pump to the pilot chamber.

An on-off valve having a position detecting function is known to detect an operation position of a valve member such as a shaft core by using a magnet (refer to Japanese Laid-Open Patent Publication No. 2001-027358).

The high/low speed control device disclosed in Japanese Laid-Open Patent Publication Nos. 2010-038337 and 2001-027358 and the selector valve switch the control valve or the selector valve by remote operation using a pilot pressure, and thus Unable to avoid becoming huge and complicated.

The present authoring device has taken such a difficult point into consideration, and the purpose of the authoring apparatus is to provide a speed selector valve that uses a simple configuration to switch the fluid actuator between high speed driving and low speed driving. Another object of the present invention is to provide a speed selector valve that allows an operator to easily confirm whether the speed selector valve is in a high speed drive position or a low speed drive position.

The speed selector valve according to the present authoring device includes a housing including a first port configured to be coupled to the fluid actuator and a second port configured to be coupled to the solenoid valve; the first throttle valve; a throttle valve configured to be in a state in which the first port and the second port communicate with each other via the first throttle valve, and the first port and the second port are via the second The throttle valve is in communication with each other; the operating knob is integrally coupled to the spool valve; and the sensor is configured to detect the position of the spool valve.

The speed selector valve can be manually configured to switch the fluid actuator between high speed drive and low speed drive using a simple configuration. The operator can easily confirm if the speed selector valve is in the high speed drive position or the low speed drive position.

Preferably, in the speed selector valve, the first throttle valve and the second throttle valve are configured to adjust a flow passage region. Therefore, the present creation can adjust the speed during the high speed drive and the speed during the low speed drive.

In the above example, preferably, the speed selector valve is constructed such that a special tool is required to adjust the flow passage area. Therefore, this creation can avoid the driving speed being changed by cheating.

Preferably, a stop mechanism configured to maintain the spool valve position in the switching position is provided. Therefore, the spool valve is stably held in the switching position, and the operator can confirm that the speed selector valve is switched to the high speed drive position or the low speed drive position by the operation knob.

The speed selector valve can be manually configured to switch the fluid actuator between the high speed drive and the low speed drive in accordance with the present authoring apparatus. The operator can easily confirm whether the speed selector valve is switched to the high speed drive position or the low speed drive position.

The above and other objects, features and advantages of the present invention will become more apparent from the description of the appended claims. .

10‧‧‧Speed selector valve

12‧‧‧ housing

14‧‧‧First throttle valve

16‧‧‧Second throttle valve

18‧‧‧ shaft valve

20‧‧‧Operation knob

22‧‧‧ valve housing

24‧‧‧Connected housing

26‧‧‧First port

28‧‧‧Second port

30‧‧‧Axis core valve with holes

32‧‧‧The first throttle valve with holes

34‧‧‧Second throttle valve with holes

36‧‧‧Connected path

38a‧‧‧shell

40a, 40b‧‧‧ valve body

42a, 42b‧‧‧ vertical holes

44a‧‧‧ horizontal holes

46a‧‧‧large diameter section

Diameter section in 48a‧‧

50a, 50b‧‧‧ small diameter section

52a‧‧‧Flange section

54a‧‧‧ needle part

54b‧‧‧ needle part

56a, 56b‧‧‧ joints

58a‧‧‧ check valve

60‧‧‧First sealing member

62‧‧‧Second sealing member

64‧‧‧First seal ring

66‧‧‧First contact

68‧‧‧Second seal ring

70‧‧‧Second contact

72‧‧‧ First joint member

74‧‧‧First flange

76‧‧‧second flange

78‧‧‧ Magnet

80‧‧‧Second joint member

82‧‧‧ claws

84‧‧‧Seal ring

86‧‧‧ venting holes

88‧‧‧Sensor

90‧‧‧ cable

92‧‧‧Restricted board

94‧‧‧ Clips

96‧‧‧ sleeve

98‧‧‧Shoulder part

100‧‧‧First groove section

102‧‧‧Second groove section

Figure 1 is a perspective view of a speed selector valve in accordance with an embodiment of the present authoring apparatus.

Figure 2 is a side elevational view of the speed selector valve shown in Figure 1.

Figure 3 is a cross-sectional view of the speed selector valve taken along line III-III as shown in Figure 2 when the core valve is in the first position.

Figure 4 is a cross-sectional view of the speed selector valve taken along line III-III as shown in Figure 2 when the mandrel valve is in the second position.

Figure 5 is a cross-sectional view of the speed selector valve taken along line V-V taken as shown in Figure 2 when the spindle valve is in the first position.

The preferred embodiment of the speed selector valve in accordance with the present authoring device will be described below with reference to this additional drawing. Hereinafter, such as "upper", "lower", "left", and "right" refer to the directions in FIGS. 3 and 4.

The speed selector valve 10 according to an embodiment of the present authoring apparatus includes a housing 12, a first throttle valve 14, a second throttle valve 16, a shaft core valve 18, and an operating knob 20. The presently-created embodiment uses a rate control system called meter-out for controlling the flow rate of fluid discharged from a fluid actuator that is not shown to control the drive speed of the fluid actuator.

The housing 12 includes a valve housing 22 having a rectangular parallelepiped shape, and a coupling housing 24 fixed to one side end surface of the valve housing 22. The valve housing 22 has a bottom surface on which a first port 26 is formed that can be coupled to the fluid actuator. On the side end surface of the valve housing 22 with respect to the side end surface to which the joint housing 24 is fixed, a second port 28 which can be connected to a solenoid valve not shown is formed.

A shaft core valve fitting hole 30 is formed in the valve housing 22 and extends from the side end surface to which the joint housing 24 is fixed to the vicinity of the opposite side end surfaces. The first throttle valve engagement hole 32 and the second throttle valve engagement hole 34 are formed in the valve housing 22 from the upper surface of the valve housing 22 to the axial valve engagement hole 30. The first port 26 is connected Connected to the core valve to match the hole 30. The second port 28 is connected to the first throttle fitting hole 32 and the second throttle fitting hole 34 via the communication path 36.

The first throttle valve 14 is disposed in the first throttle fitting bore 32 and forms a high speed drive flow passage. The second throttle valve 16 is disposed in the second throttle fitting bore 34 and forms a low speed drive flow passage. The first throttle valve 14 and the second throttle valve 16 use the same basic configuration. Therefore, the configuration of the first throttle valve 14 will be described below by way of a representative example. The subscript symbol a is a reference numeral used for each component of the first throttle valve 14. The subscript symbol b is a reference number used for each component of the second throttle valve 16.

The first throttle valve 14 includes a cylindrical casing 38a fixed to the valve housing 22 by a threaded connection, and a valve body 40a disposed in the casing 38a. The sleeve 38a includes a lower member that fits into the first throttle fitting bore 32 and a member that protrudes from the valve housing 22. The casing 38a includes a vertical hole 42a penetrating in the axial direction, and a horizontal hole 44a spanning the vertical hole 42a and connected to the communication path 36. The diameter of the vertical hole 42a is formed by a large diameter portion 46a, a diameter portion 48a and a small diameter portion 50a, and is configured to change from the upper end to the lower end in three stages.

The valve body 40a is fitted to the diameter portion 48a of the vertical hole 42a at a central portion in the axial direction. The flange portion 52a formed at the upper end portion of the valve body 40a is locked into the large diameter portion 46a of the vertical hole 42a. Conical surface The needle-shaped portion 54a is the small diameter portion 50a provided at the lower end side end of the valve body 40a and facing the vertical hole 42a. The flange portion 52a of the valve body 40a is provided with an engagement portion 56a having a predetermined shape that engages with a special tool for rotating the valve body not shown. By rotating the valve body 40a and changing the locking position of the valve body 40a with respect to the casing 38a, the outer circumference of the needle-like portion 54a formed in the valve body 40a and the small portion of the vertical hole 42a can be adjusted. A flow passage area between the diameter portions 50a.

The check valve 58a is disposed at an outer circumference near the lower end of the casing 38a and includes a lip abutting against the first throttle fitting hole 32 in a predetermined inclined direction. The check valve 58a only allows fluid to flow from the second port 28 to the shaft valve mating bore 30 in accordance with the presently described embodiment. The first sealing member 60 is disposed between the valve housing 22 and the sleeve 38a. The second sealing member 62 is disposed between the casing 38a and the valve body 40a.

As described above, the second throttle valve 16 and the first throttle valve 14 use the same basic structure. However, compared to the first throttle valve 14, the second throttle valve 16 has the outer circumference of the needle-shaped portion 54b of the valve body 40b and the small diameter portion 50b of the vertical hole 42b. The flow channel area between them is small.

The core valve 18 is slidably disposed in the shaft valve mating hole 30 and includes a first contact portion 66 and a second contact portion 70, the first contact portion 66 including a first seal ring 64, and the first The second contact portion 70 includes a second seal ring 68. When the core valve 18 abuts the shaft core When the valve is fitted to the wall portion of the end portion of the hole 30, the leftward movement of the spindle valve 18 is restricted. When the second joint member 80 described below abuts against the restricting plate 92 described below, the rightward movement of the spindle valve 18 is restricted.

As shown in FIG. 3, when the core valve 18 is moved to the rightmost end, and the second seal ring 68 of the second contact portion 70 abuts the first port 26 and the second throttle When the valve is engaged with the wall valve between the holes 34 to fit the wall surface of the hole 30, the core valve 18 is positioned at the first position. As shown in FIG. 4, when the core valve 18 is moved to the leftmost end, and the first seal ring 64 of the first contact portion 66 abuts against the first port 26 and the first throttle When the valve is engaged with the wall valve between the holes 32 to fit the wall surface of the hole 30, the core valve 18 is positioned at the second position. The first port 26 is in communication with the second port 28 via the first throttle valve 14 when the spool valve 18 is in the first position. The first port 26 is in communication with the second port 28 via the second throttle valve 16 when the spool valve 18 is in the second position.

A first coupling member 72, like a shaft, is attached and fixed to an end portion of the spindle valve 18. The first joint member 72 includes a first flange 74 located at a portion near the center and a second flange 76 located at an end portion relative to the spool valve 18. An annular magnet 78 is placed between the core valve 18 and the first flange 74. The second joint member 80, which is similar in shape to the shaft, is further coupled to the first joint member 72. In particular, one of the pair of claw portions disposed at one end portion of the second joint member 80 82 is sandwiched between the first flange 74 and the second flange 76 of the first coupling member 72. The second coupling member 80 is placed in both the valve housing 22 and the coupling housing 24. The other end portion of the second joint member 80 protrudes outward from the joint housing 24, and the operation knob 20 is fixed to the projecting end portion. The operating knob 20 is painted red to promote recognition. The spindle valve 18, the first coupling member 72, the second coupling member 80, and the operation knob 20 are disposed substantially coaxially, and can reciprocate integrally in the axial direction.

Sealing rings 84, 84 are disposed adjacent the ends of the mandrel valve 18 and abut against the wall surface of the mandrel valve mating bore 30. The vent hole 86 shown in Fig. 4 is connected to the outside by a space formed between one end surface of the core valve 18 and the shaft valve fitting hole 30.

As shown in FIG. 5, the sensor 88 is disposed inside the valve housing 22, and detects the magnetic force of the magnet 78 to detect whether the core valve 18 is at the first position. Or at the second location. The signal detected by the sensor 88 is output via an electrical cable 90 to an external warning light (not shown).

The joint housing 24 includes a through hole into which the second joint member 80 is inserted. A plurality of step portions are formed in the through holes. The annular limiting plate 92, the clip 94 formed of the elastic member, and the cylindrical sleeve 96 are placed on the stepped portions in this order from the left end. The inner circumferential side end of the restricting plate 92 projects inwardly to cover a portion of the opening end portion of the shaft valve fitting hole 30. When the core valve 18 moves to the right, The shoulder portion 98 of the second joint member 80 abuts against the restricting plate 92. The inner circumferential surface of the sleeve 96 is a sliding guiding surface of the second coupling member 80.

The clip 94 is formed by rotating the wire in a spiral shape nearly twice. The first groove portion 100 and the second groove portion 102 are formed on the second joint member 80 and elastically engaged with the inner circumferential side end of the clip 94. When the spool valve 18 is in the first position, the clip 94 becomes smaller in the radial direction and elastically engages the first groove portion 100. When the mandrel valve 18 is in the second position, the clip 94 becomes smaller in the radial direction and elastically engages the second groove portion 102. The clip 94, the first groove portion 100 and the second groove portion 102 form a stop mechanism for holding the spindle valve 18 at the first position and the second position by a predetermined holding force.

The speed selector valve 10 in accordance with the present embodiment is substantially configured as described above, and the function of the speed selector valve 10 will be described below with reference to Figures 3 and 4.

During normal operation of the fluid actuator and device not shown, the operating knob 20 is drawn and the stop mechanism maintains the spool valve 18 in the first position (see Figure 3). When the solenoid valve is switched to the pressure release side end, pressure fluid stored in the cylindrical chamber of the fluid actuator flows from the first port 26 to the first throttle valve 14 via the spindle valve 18. Further, the pressure fluid flows in the flow passage formed between the outer circumference of the needle portion 54a of the valve body 40a and the small diameter portion 50a of the vertical hole 42a, and then passes through The communication path 36 is discharged from the second port 28. The flow passage area of the first throttle valve 14 is relatively large. Therefore, when the spool valve 18 is at the first position, the flow rate of the fluid discharged by the fluid actuator is large, and the fluid actuator is driven at a high speed.

During maintenance of the device containing the fluid actuator, the operating knob 20 is urged against the retaining force of the stop mechanism to move the spindle valve 18 to the second position. The spindle valve 18 is held in the second position by the stop mechanism (see Fig. 4). When the solenoid valve is switched to the pressure release side end in this state, the pressure fluid stored in the cylindrical chamber of the fluid actuator flows from the first port 26 via the spindle valve 18 to the The second throttle valve 16. Further, the pressure fluid passes through the flow passage formed between the outer circumference of the needle portion 54b of the valve body 40b and the small diameter portion 50b of the vertical hole 42b, and then passes through the communication path. 36 and discharged from the second port 28. The flow passage area of the second throttle valve 16 is relatively small. Therefore, when the spool valve 18 is in the second position, the flow rate of the fluid discharged by the fluid actuator is small, and the fluid actuator is driven at a low speed. Therefore, this creation can safely perform maintenance operations.

The sensor 88 and the warning light inform the operator whether the spool valve 18 is in the first position or the second position, that is, whether the speed selector valve 10 is switched to a high speed drive position or a low speed drive position. Therefore, the operator can easily confirm the safety status during this maintenance operation.

This creation can finely adjust the flow passage area of the first throttle valve 14 and the second throttle valve 16 by using a special tool. That is, by using a special tool that can be engaged with the predetermined shape of the engaging portions 56a, 56b formed on the valve bodies 40a, 40b, the appropriate amount is appropriate in the proper direction before the use of the speed selector valve 40. Rotating the valve body 40a, 40b upwards, the creation can increase or decrease the flow passage area as needed. This configuration allows only the special tool to rotate the valve body 40a, 40b, so this creation can avoid the drive speed being deliberately altered by cheating.

When the operator pulls the operating knob 20 by a predetermined amount, the stopping mechanism acts to maintain the spindle valve 18 at the first position by the predetermined holding force. Therefore, the operator can confirm that the speed selector valve 10 is reliably switched to the high speed drive position based on the feeling of the buckle. Likewise, when the operator pushes the operating knob 20 by a predetermined amount, the stopping mechanism acts to maintain the spindle valve 18 at the second position by the predetermined holding force. Therefore, the operator confirms that the speed selector valve 10 is reliably switched to the low speed drive position based on the feeling of the buckle.

The speed selector valve 10 can be manually switched between the high speed drive and the low speed drive using a simple configuration in accordance with the present embodiment. The operator can easily confirm if the speed selector valve is in the high speed drive position or the low speed drive position.

In this embodiment, the author uses a speed control system called a metering. However, a speed control system known as metering in for controlling the fluid flow rate to the fluid actuator can also be used. In this case In the sub-valve, the check valve provided to the first throttle valve and the second throttle valve will be changed.

The speed selector valve is not limited to the above-described embodiment in accordance with the present authoring apparatus, and various configurations can be naturally used without departing from the scope of the present authoring apparatus.

Claims (4)

A speed selector valve includes a housing (12) including a first port (26) configured to be coupled to a fluid actuator and a second port (28) configured to be coupled to a solenoid valve; a throttle valve (14); a second throttle valve (16); a core valve (18) configured to pass the first throttle at the first port (26) and the second port (28) a state in which the valves (14) are in communication with each other, and a state in which the first port (26) and the second port (28) communicate with each other via the second throttle valve (16); operating the knob (20) ), integrally coupled to the core valve (18); and a sensor (88) configured to detect the position of the core valve (18). The speed selector valve of claim 1, wherein the first throttle valve (14) and the second throttle valve (16) are configured to adjust a flow passage region. The speed selector valve of claim 2, wherein the speed selector valve is constructed such that a special tool is required to adjust the flow passage area. A speed selector valve according to claim 1, which is provided with a stop mechanism configured to maintain the spindle valve (18) at a switching position by a predetermined holding force .