JPS6110124A - Self-housing type clutch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to clutches. More particularly, the present invention relates to a fan clutch mounted on a drive shaft for intercooling of an engine.

It is an object of the present invention to provide a self-contained, temperature-controlled fan clutch that does not have external fluid dynamic or power lines connected to the clutch to operate the clutch.

That is, conventional self-containing clutches modulate.

That is, the transmitted power is proportional to the ambient temperature. On the other hand, the clutch of the present invention operates fully on or fully off depending on the selected temperature for clutch operation or non-operation.

The pump system of the present invention is non-modulating because there is a selected temperature for closing and opening by the first thermal detector that controls the bypass check valve. This check valve allows pressure to be bypassed into a high pressure chamber on one side of the piston supporting the friction surface.

Another object of the present invention is to provide a 20th thermal detector that engages or disengages a piston pump associated with the heat detector described above, thereby providing a fully on or fully off condition of the latch. That's true.

Yet another object of the present invention is to provide a pump system within a clutch that is actuated by internal fluid pressure in a self-contained friction clutch.

Yet another object of the present invention is to provide an internal piston pump that operates only when necessary to engage the friction surfaces of the clutch, thereby transmitting power to a fan for engine cooling.

Hereinafter, the clutch according to the present invention will be explained in detail.

Referring to the drawings, the bolt 12 connects the coupling B.
A self-contained fan clutch A, including a plate 10, is shown with a circular mounting secured to it. This coupling, not shown, is connected to the active shaft. Regarding the function of the taratch, it is preferable to refer to FIGS. 8 and 9. A knob 14 having a spline 16 metal is attached to the plate 10.

Spline 16 engages spline 18 of hub 20 of drive disk 22 which has a flat central portion 24 . The flat central portion 24 terminates radially in an offset portion 26 which terminates in an outer flange portion 28.

The hub 14 is provided with a recess 30, and the hub 22 is provided with a recess 30.
A recess 32 is provided. Inner race 3 of bearing 36
4 is gripped between the shoulders of recesses 30 and 32. Reference numeral 38 designates a hub portion 40 (including a first outer housing portion) from which a flat central portion 42 extends radially. The hub portion 40 is
A recess 46 is provided within which an outer race 48 of bearing 36 is mounted by an interference fit. Thereby, the first housing part 38 is rotatable over the bars 14 and 20.

A plurality of fan blades 49 are secured to first housing portion 38 by bolts 39 .

The end portion 50 of the hub 14 is provided with a hole 52 . Central portion 24 of drive disk 22 and its extension 58
The bolt 5 threadably engages with an axial opening 56 provided in the
4 extends through hole 52. A drive cam 60 is secured to the inner surface of the central portion 24 of the drive disk 22 by bolts 61 and a central opening 59 extends through the cam 60. The extension portion 58 extends through the central opening 59.

Reference numeral 62 designates a second outer non-ring portion including a flat circular surface portion 64. circular surface portion 64
terminates in a flange portion 67 at the outer periphery. A plurality of spaced bolts 69 passing through flange 671 and extending into offset portion 44 of housing portion 38 secure the first housing to the second housing portion. An annular shoulder 66 connects housing portion 620 to portion 64.
is formed on the inner surface of the Is a part of the annular shoulder 66 an annular cylinder wall? A groove 68 is provided on the outer periphery of the annular 7-liner wall to accommodate an O-
Ring 70 is positioned.

An annular/lindrical member 72 having a central/axial extension 75 is provided. A peripheral flange portion 74 extends from this extension 75 and has a recess 76 formed at its edge in which an o-ving 78 is positioned. Reference numeral 80 designates an annular piston having a central annular portion 82 perpendicular to the radial axis of the central annular portion 82 . An annular portion 84 extends radially outwardly from this annular portion 82 . The Q-IJ ring 70 is in sealing contact with the annular portion 82 of the piston. Friction surface ring 86
is secured to the piston annular portion 84 by spaced bolts 88. An annular piston flange portion 90 extends radially inwardly from the central annular portion 82 of the piston 80. At its inner end there is a recess 92
is provided and an O-ring 94 is positioned in sealing contact with the extension 75. 7 lunge 94 is the second
are positioned between the flange portion 66 of the housing portion 60 and the cylinder member 72 so that they are slidably movable within the cylinder chamber C formed between the flange 66 and the flange portion 74. being done. The flange 90 of the piston is an O-ring 70.7
8 and 94. Cylinder chamber C
is divided into two parts by a flange 90 of the piston, namely, a low pressure chamber side CcL and a high pressure chamber side Cb.

An axial recess 91 is formed in the center of the cylinder member 72 and a brass support bushing 93 is recessed therein. Extension 58 is positioned within bushing 93 such that extension 58 and bushing 93 rotate relative to each other.

A first chamber 96 is formed within the extension 75 of the cylinder member 72 . The pressing blade 98 is slidably mounted within the first chamber 96 and is attached to the coil spring 1.
02 is the annular shoulder 10CB of the press plate 98 and the chamber 9G.
: Covered between. The limited length of the coil spring provides a minimum 10 bond load on shoulder 100 and pressure plate 98. Conduits 95 and 97 are formed within axial extension 75 which connect the chambers described below with reference to FIGS. 3, 4 and 5. conduit 9
7 communicates with conduit 99.

Reference numeral 104 designates a first wax-filled heat pill, as is known in the art, threaded into flange portion 66. Stem 106 extends into a recess 108 in suppression plate 98. Pressure plate 98 has an axial projection 110 on its inner surface. The axial projection 110 has a coil spring 112 attached thereto. The other end of the coil spring is connected to the pump plunger 116 on the cylinder.
It is mounted on a similar protrusion 114 mounted on the outer end of the. Pressure grating 98 has an axial protrusion 110 on its inner surface. This protrusion 110 supports a coil spring 112, and its other end is supported on a similar protrusion 114 provided at the outer end of a cylinder-shaped pump plunger 116. Pump plunger 116 has a semi-spherical outer end 5118' for contacting cam 60. Pump plunger 116 is inserted into cylinder wall 11 in sealing engagement with O-ring 119 positioned within annular groove 121.
Move back and forth within 3. The spring 112 provides a return force (restoring force) to the plunger as it reciprocates, as will be described below.

The second receiver has a receiving chamber 120 formed within the extension portion 75 and into which the insertion sleeve 115 is tightened. The sleeve is placed away from the bottom of chamber 120, thereby forming passageway 117. The passage 117 is the first
A laterally oriented conduit 1 communicating with the passageway 176 connecting to chamber Cb, as shown in the Figure and in particular at 5λ.
17α. A pressure plate 122 is slidably mounted within the sleeve and a coil spring 127 is mounted between the pressure plate 122 and an annular shoulder 124 of the chamber 120. The regulated length of coil spring 127 applies a minimum load of 10 bonds to shoulder 124 and suppression plate 122.

Reference numeral 126 designates a second conventionally known wax-filled heat pill screwed and secured to flange portion 66. Stem 128 extends into a recess 130 in second pressure plate 122 .

The suppression plate 122 has axial protrusions 132 on all four surfaces thereof for supporting a coil spring 134.

The bent end of spring 134 engages a conventional thermally controlled bypass checker valve 136 having an O-ring 138. O-ring 138 seals valve seat 140 on conduit 140 as described below.

Reference numeral 142 designates a third receiving chamber into which the insertion sleeve 144 is tightly fitted (see FIG. 2). This sleeve 144 has its own chamber 146t, and its inner end terminates in a conduit 148. A valve seat 150 is provided at the junction of the chamber and the conduit. A suction side poppet valve 152 is further provided having a shoulder 154 extending from a stem 156. A coil spring 158 is positioned on the stem 156 and between the shoulder 154 and the inner face of the outer peripheral flange portion 66, thereby biasing the valve 152t--normally to its closed position. Sleeve 144 is spaced from the bottom of chamber 142 so that conduit 148
A passageway 16 (l) is formed which interconnects the bores 162 and 162 , which communicates with the cylinder chamber portion Cα.

Reference numeral 168 designates a fourth receiving chamber into which the insertion sleeve 170 is tightly fitted. This sleeve 170
has its own chamber 172, the inner end of which terminates in a conduit 174. The valve seat 176 is located in the chamber 17.
2 and the conduit 174. stem 182
A pressure side poppet valve 178 is further provided having a shoulder 180i extending υ therefrom. A coil spring 184 is positioned on the stem 182 and between the shoulder 180 and the inner surface of the peripheral flange portion 66, thereby biasing the valve 178 in its normally closed position. A sleeve 170 is spaced from the bottom of the chamber 168 and defines a passageway 186 therewith. Passageway 186 connects at right angles to conduit 99, as particularly shown in FIGS. 3 and 4. Chamber 172 communicates with conduit 173, which communicates with conduit 164 and thus with high pressure side chamber Cb.

As shown in FIG. 1, a number of spaced clutch return springs 190 are also provided. Each is positioned within a recess 192 formed within piston portion 84 and positioned to press against offset portion 44 of housing portion 38 .

To allow the piston 80 to reciprocate within the cylinder chamber C, a number of spaced torque bolts 198 are provided. Each is secured at one end to second outer housing 620 portion 64.

The other end is slidably mounted within a sleeve 200 mounted within annular portion 84 of piston 80.

When the engine to which clutch A is installed is cold, clutch interface portions 86 and 28 are separated by a gap. This gap is
Leave the clutch in the disengaged state. At this time, the blade 49 is stationary. In this state, the stem 106 of the heat pill 104 is fully retracted, and the stem 128 of the heat pill 126 is also fully retracted (see FIG. 8). When the engine reaches a predetermined temperature established by the temperature characteristics of the wax in the pill, the pill 10
The stem 106 of No. 4 expands due to the expansion of the wax within the pill. As a result, spring 112 is compressed and moved into position into engagement with piston pump plunger 116i cam 60.

While the engine is rotating, the cam 60 is connected to coupling B.
' to rotate. As a result, pump plunger 116 reciprocates along its longitudinal axis. The cam moves the plunger inward once per revolution of the cam. The piston pump plunger is a spring 112.
It is returned to the outside by

As a result of the above, during outward movement of the piston pump granger, fluid is drawn by the inner end of the piston plunger from the low pressure side Cα of the piston 90 and the reservoir 166 via conduits 162, 160, 186 and 95.

The magnitude of the suction force is sufficient to open check valve 152 against the action of spring 158, thereby displacing fluid. Additionally, the suction force serves to fill the interior of the piston plunger 116 with fluid once the outward stroke of the piston plunger begins. When the cam 6o rotates and passes over the center, the piston is pushed inward by the cam, thereby applying a pump pressure surge into the fluid previously being aspirated inside the p-piston plunger 116. This pressure causes fluid to flow through conduits 97, 99, 186, conduit 174 and sleeve chamber 17.
It flows through 2. This pressure opens pocket valve 178'i, which is normally held closed by spring 184. Due to fluid pressure, p1 fluid flows through conduit 1
73 (+- through the chamber 172 of the sleeve 170 to the conduit 1
64, and flows to the high pressure side chamber Cb.

Piston portion 84 thereby moves friction surface 86 into a position such that friction surface 86 is in compressive engagement with the drive disk. Engagement of the clutch is thereby achieved. As a result, the housing with blades 49 rotates.

When the clutch is engaged, the pumping action of the piston plunger 116 is stopped and the piston plunger simply rotates with the cam 6o. That is, the pump provides the amount of pressure necessary for engagement at the interface between friction surface 86 and drive disk 22. When additional torque needs to be transmitted to the fan, such as when the engine speed increases, the clutch interface slips, thereby reducing the relative movement between the Shicamuro 0 and the piston plunger 116. This will occur.

Is this another piston plunger cycle? to form a friction surface 86 and drive disk 22.
Builds up a sufficient amount of pressure to cause the clutch interface to engage positively.

It should be noted that during the clutch engagement cycle described above, wax-filled heat pill 126 is heated similarly to pill 104, so that valve 136 is maintained in its closed position. This checks the flow from reservoir 166 to conduit 117α and thus to the high pressure side of the reservoir. In other words, the piston pump is
When the unit is heated, check valve 136
Since it is closed, suction cannot be drawn from the high pressure side of the reservoir.

As the engine cools and airflow passes through the wax-filled heat pill 104.126'L- the temperature of the pill decreases. Pill 126 retracts bypass valve 136 so that high pressure fluid is routed from low pressure side Cα to conduit 141.1.
17α, reservoir 166 and conduit 164.160.1
62 to the low pressure side Cα of the piston. As a result, the friction surface 86 separates from the drive disk 22[eta], thereby causing the housing and the fan blades attached to that surface to cease their rotation, as illustrated in FIG.

Briefly, when the temperature pill 104 is exposed to a heat source, the stem 106 moves the piston plunger 116 into contact with the rotating cam 60 (see FIG. 8). Assuming that the piston plunger moves towards the outside of its cylinder, it
8. Suction fluid from 160 and 162 to the low pressure side Cα of the piston 90. and open to the pressure of the low pressure side Ca, and due to the fact that at the same time the valve 178 is drawn into its closed position, the conduit 97.99.186.1
74.164 and the high pressure side Cb will no longer be able to be suctioned.

When the plunger 116 of the piston is moved inward by a cam acting on the piston, fluid pressure is applied to conduit 97.
99. 186. Further, as the piston moves inward, the conduit 95.97
and the pressure within sleeve 144 is no longer able to pressurize valve 152. The reason is that fluid pressure overcomes the action of return spring 1580 and
The purpose is to move it to its closed position and remove it. That is,
The chamber portion, ie, the low pressure side Ca, is maintained in a relief state, thereby causing the piston to move as described above. During the engagement cycle of the clutch as described above, wax-filled heat pill 126, like pill 104, is heated, thereby causing valve 136 to remain in its closed position, thereby checking fluid flow from the reservoir. . When the clutch is engaged, the plunger rotates with the cam.

When an engine is retired, the temperature of the pill also decreases. Pill 126 opens bypass valve 136, which allows high pressure fluid to flow through conduit 141.117α and reservoir 166.
．． 164, 160 and 162, and moves to the low pressure side Cα. The piston 90 thereby causes the spring 190 to
Shift to high pressure side cb. The urchin, housing and fan blades stop rotating as shown in FIGS. 1 and 7.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the self-contained fan clutch of the present invention taken along line 1--1 in FIG. Figure 2 shows 2 of Figure 1, which is rotated 90 degrees from Figure 1.
FIG. 2 is a partial cross-sectional view taken along line -2. FIG. 3 is a cross-sectional view taken along line 3-Training in FIG. 2. FIG. 4 is a sectional view taken along line 4-4 in FIG. 3. FIG. 5 is a sectional view taken along line 5-5 in FIG. 3. FIG. 6 is an end view of the fan clutch. FIG. 7 is a perspective view of the cam. FIG. 8 is a complete pictorial illustration of the concept of the present invention when the clutch is in an engaged state. The ninth time is a pictorial diagram similar to FIG. 8 when the clutch is in the disengaged state. A...Fan clutch B Coupling 22...
Drive disk 38 First outer housing part 62...Second outer housing part 80...Piston 86/Friction surface ring (5 people outside) F≦- and =? Ri2

Claims (4)

[Claims] (1) A first member; A second member rotatably attached to the first member; A drive disk configured to rotate together with the first member; Supported by the second member a piston mounted so as to be able to reciprocate within a cylinder, the piston driving the cylinder toward a high pressure chamber and a low pressure chamber; such that the second member rotates together with the first member; , a friction surface device engaged by the piston in contacting engagement with the drive disk; an environmental sensing device supported by the second member; and a high pressure chamber side of the cylinder for moving the piston in the cylinder. A device actuated by the environmental sensing device for moving fluid between the low pressure chamber sides, thereby causing the friction surface device to engage and disengage the drive disk, etc.; When the environmental condition sensed by the environmental sensing means is within a first range, the friction surface device is disengaged from the drive disk, so that the first and second members are engaged with each other. When the environmental condition sensed by the environmental sensing device is within a second range, the friction surface device engages the drive disk, thereby preventing rotation. A self-contained clutch without an external control mechanism, comprising: a device in which the first and second members are adapted to rotate in relation to each other; (2) In the clutch according to claim 1, the device for moving the fluid is a device for pressurizing the fluid from the low pressure chamber side to the high pressure chamber side of the cylinder; and the state of the environment. is within a second range, the fluid is switched from the high pressure chamber side of the cylinder to the low pressure chamber side; however, when the environmental condition is within a first range, the fluid is switched from the high pressure chamber side of the cylinder to the low pressure chamber side. and a device for biasing the piston toward the high pressure chamber of the cylinder, thereby providing a fully on or fully off condition of the clutch. A clutch. (3) The clutch according to claim 2, wherein the first member further includes a device that rotates together with the operating member to operate the pump device together with the environmental sensing device. A clutch consisting of. (4) a first member for connecting to a power source; a second member rotatably attached to the first member; a drive disk having the same rotational position as the first member; a friction surface device reciprocally supported on said second member for engagement with a drive disk; an environmental sensing device supported by said second member; and said environmental sensing device is in a first environmental range. when the friction surface device is in contact with the drive disk, and the environmental sensing device senses a second environmental range, the friction surface device is disengaged from the drive disk, thus causing the friction surface device to disengage the drive disk. When the environmental condition sensed by the environmental sensing device is within a first range, the friction surface device disengages the drive disk, and the environmental condition sensed by the environmental sensing device is within a first range. When in a second range, the friction surface device engages the drive disk and the first and second members rotate in relation to each other, the first member and the environment. A self-contained clutch without an external control mechanism, comprising: a device that is driven depending on the state of a detection device;