JPS5926360A - Power steering apparatus - Google Patents

Abstract

PURPOSE:To reduce cost by improving the workability of a valve mechanism for switching flow-passages for a jerotor, in an apparatus for feeding the pressurized liquid in a proportional amount to steering into an actuator, by utilizing the metering function of the jerotor. CONSTITUTION:A valve member 22 is fitted into the sleeve 24 of a valve mechanism to which a steering shaft is connected through a spline 26, and the left edge of a dock bone 32 is engaged with a spline installed in the inner diamter part of the valve member 22, and the right edge is spline-fitted onto the rotor 34 of a jerotor mechanism installed in a stator 12. Holes 82, 84, 86, 88, 90, and 92 are drilled on the above-described sleeve 24, and a number of holes are drilled in the radial direction onto said valve member 22, besides the through-holes 98, 100 each of which having different length. Said valve member 22 is followed in its revolution through feeding of liquid pressure to the jerotor by the turning of the sleeve 24.

Description

[Detailed description of the invention]

The present invention relates to a power steering device that uses the meter link function of the gerotor to supply pressurized fluid fC', iiJ to the 7 actuators of the steering mechanism in proportion to the steering operation. The present invention relates to a power steering device in which the workability of a pulp mechanism for switching paths is improved to reduce costs. Conventionally, this is the first power steering device of this type to utilize gerotor metering. For example, as shown in Japanese Patent Publication No. 37-10966,
In such a conventional device 4, the rotating shaft of the steering wheel is connected to the rotary spool rotatably provided in the center of the housing, the spool is externally inserted into the one-turn spool, and the sleeve is inserted into the gerotor. The rotation of the spool caused by the steering operation supplies hydraulic pressure to the gerotor through the sleeve, causing the rotor to rotate in synchronization with the steering operation, and the rotation of the rotor is also applied to the sleeve. The sleeve rotates following the spool, and as the gerotor rotor rotates, the sleeve's IJo pressure fluid is supplied to the actuator of the steering mechanism from the part that contracts slightly during the steering operation, allowing for light operation. Create the steering gear groove with force! I'm trying to make it possible. However, in such conventional power steering devices, a pulp mechanism was used in which a sleeve rotated by a gerotor was inserted onto the outside of a spool that rotated by steering operation, so switching holes formed in the spool and sleeve were used as a pulp mechanism. In order to communicate, it is necessary to form multiple opening grooves running in the axial direction on the outer circumference of the spool, and the opening of the switching hole is widened as a counterbore to ensure the liquid path area. In addition to machining the opening groove and hole 1'' part of the switching hole, special rye machining is required to form the groove in the axial direction. It requires a considerable amount of processing man-hours, which increases costs, and furthermore. Many open grooves have been formed between the sleeve and the sleeve inserted into the spool. There was a problem in that the need to increase accuracy further led to an increase in cost.The present invention was made in view of these conventional problems, and it connects the pulp member in the center of the housing to the gerotor. , turn 1i by steering operation to the outside of this pulp member.
By extrapolating the spool to be ijl, all the hole holes can be realized by machining the flow passages formed in the valve member and the spool, which greatly reduces the machining cost of the pulp mechanism and also improves the axial direction. An object of the present invention is to provide a power steering device in which fluid leakage is significantly reduced by embedding a flow path in a pulp member, thereby eliminating the need for openings with grooves on the sliding surface with the spool. Hereinafter, the present invention will be explained based on the drawings. FIG. 1 is a schematic diagram showing an embodiment of the present invention together with a hydraulic pressure source and an actuator of a steering mechanism. First, to explain the structure, this is a housing incorporating a 10-piece pulp mechanism, and an end cover 14 is tightened and fixed with bolts 16 to the right side of the housing 10 (7) via the stator 12 of the gerotor mechanism. A front cover 20 is attached to the left side by fitting a retainer 18. A cylindrical pulp member 22 is rotatably inserted into the center of the inside of the housing 10, and a sleeve 24 is rotatably inserted outside the pulp member 22.
A spline 26 is cut at the left end of the steering wheel, and the rotating shaft of the steering wheel is fitted into this spline 26. ``On the other hand, the pulp member 22 provided in the center of the housing 0
The spline 30 cut into the inner diameter of the dog bone 32
The left ends of the dog bore 32 are engaged, and the right end of the dog bore 32 is spline-fitted to a rotor 34 of a gerotor mechanism provided within the stator 12. Also, at the lower end of the housing 10 there is an onbu boat (hereinafter referred to as "P").
port, 1) 36. 1. Place the steering mechanism actuator on the right side. 'a 1 OJ-f light boat (hereinafter referred to as "R boat") 38. Tank boat (hereinafter referred to as "T port") 40. and a left boat (hereinafter referred to as "L boat") 42 for driving the actuator of the steering gear + 14 to the left. Further, the 'R boat 40 is connected to the tank 46 side of the hydraulic pump 44, and the R boat and the L boat are each connected to actuators 48R and 48L of the steering mechanism, respectively. Furthermore, in the cross-sectional view of FIG. In this example, since the stator 12 has seven internal teeth and the rotor 34 has six external teeth, seven inter-mountain gaps are formed. It is formed diagonally, and seven corners of this communication hole 52 are formed in the direction divided into seven radial parts.The sleeve 24 and the pulp member 2 provided in the housing 10
2, a rectangular notch 56 is formed on the left side of Kt:I, and a torsion bar 58 having a structure divided in a direction perpendicular to the direction 11 is inserted into this notch 56, and a torsion bar 58 is inserted between the tone yompers 58. A spring 6° is inserted in the center of the pulp member 22 to center the pulp member 22 which is rotated by the gerotor mechanism following the sleeve 24 which is rotated by the steering operation. Also, the front cover 2 attached to the left side of the housing 10
The bearing of the sleeve 24 corresponding to 0-f has a structure in which a thrust washer 64 and a thrust pairing 66 are provided next to the X seal 62, and further between the bearing 10 and the nozzle 10.
The stator 12 of the gerotor mechanism is sealed by an O-ring 68 and mounted on the right side of the housing 10.
'o) O-rings 70 and 72 are also interposed in the surface area to provide a hydraulic seal. The housing 10 in the embodiment of the present invention shown in FIG. Details of the hydraulic flow paths formed in each of the sleeve 24 and the pulp member 22 will be made clear in the description of each member later. FIG. 2 is an end view taken out from the front cover 20 side of the gerotor mechanism in the embodiment shown in FIG. 1, and shows seven rollers arranged at equal intervals on the peripheral wall of the liquid chamber of the stator 12. This roller 74 forms internal teeth.
The rotor 34 has six external teeth, which is one less than the seven internal teeth of the stator, on the internal teeth of the stator 12.
The stator 12 and C-34 are engaged with each other with 6.
Interdental spaces are formed at seven locations between the teeth. For these seven mountain gaps, as shown by broken lines, housings 10ill11. l: υ obliquely formed communication hole 5
2 is open. Such a gerotor mechanism has a metering function in the power steering device of the present invention, which supplies the actuator of the steering mechanism with a gerotor from a hydraulic pump proportional to the amount of steering operation. 1- That is, when pressurized hydraulic pressure from a hydraulic pump is supplied to the interdental gap on the right side of the eccentric line 78 connecting the center of the stator 12 and the eccentric axis 76 of the rotor 34, the rotor 34 rotates counterclockwise. As the rotor 34 rotates on its own axis, it performs a clockwise revolution as indicated by the arrow A, and as a result, the interdental gap on the left side of the eccentric line 78 contracts as the rotor 34 rotates clockwise as indicated by the arrow A.
An amount of liquid equal to the contracted volume in the interdental gap on the left side of the eccentric line 78 is supplied to the seventh cutuator of the steering mechanism. On the other hand, if pressurized hydraulic pressure is supplied from the interdental gap KM pressure water pump on the left side of the eccentric line 78, the rotor 34 rotates clockwise and rotates at a rate of 7J , the interdental gap on the right side of the eccentric line 78 contracts, and the Numata pump supplies the actuator of the steering mechanism with a liquid volume proportional to the volume of the contracted gap. FIG. 3 shows the housing 10 taken out from the embodiment shown in FIG. 1, and FIG. 4 shows a side view of the port side. In other words, each η scale θ inside the housing 10/fi
Four annular grooves 80P, 80R, 80T, 80L (
However, the symbols PL are shown corresponding to each port. ), and six communicating holes 52 are provided in the inner diameter part on the right side, which are connected to the interdental space of the gerotor mechanism shown in Fig. 2. Each has a P-bow 436. as shown in FIG. R bow) 3
8.Communicates with each of T port 4o and L boat. FIG. 5 shows the sleeve 24 taken out from the embodiment shown in FIG. 1, FIG. 6 shows a right side view, and FIG.
Each cross-sectional view taken along A-G-G is shown. That is, the sleeve 24 has a spline 26 that engages the rotating shaft of the steering wheel inside the small-diameter shaft portion at the right end, and also has a notch 56 that shines on the spline 26 and attaches a torsion bar for centering.
Holes 82, 84 following 6. Holes 86, 88, 90, and 92 are formed by machining, and the number and position of each hole is as shown in FIG. FIG. 8 shows a smaller version of the pulp member 22 in the embodiment shown in FIG. 1. FIG. 9 shows a left end view, and FIG. - shows the Q cross section - (-) shows,
Further, FIG. 11 shows each cross-sectional view along A-A-J-J in FIG. 8 in half section. First, to explain the configuration, a notch 56 is formed on the left side of the valve part 2:1 to which a torsion bar and spring for centering are attached, and the rotor 34 of the diaphragm mechanism is connected to the notch 56 following the notch 56. A spline 30 into which a dog bone 32 for connection is fitted is formed, and a hole 91 (see Fig. 11 (C1
), Hole 9: U and 94 (m 11 Figure (I'lOn)
Reference 1 and hole 96 (Fig. 8111 (It refers to
Furthermore, communicating holes 9B and 100 made of different feldspars are formed by drilling in the direction of VCffQb within the valve part 22 from the right end. As shown in FIG. 10, the communication holes 98 and 100 are arranged equally into 61 holes as shown in FIG.
104 and 106 are open on the outer periphery, and communication holes with appropriate dimensions 100 are holes 107 and 10
8 and 110, respectively, and the positions and numbers of these holes are shown in the sectional view taken along the line '1' in FIG. 11. Also, a counterbore hole IJ2B is provided on the outer periphery between the holes 107 and 102 of the pulp member 22 (not shown in FIG. 8) (FIG. 11fB)
The dust hole 112B is divided into six parts as shown in Fig. The annular groove 1 of this C-C cross section is connected by the formation of
2, on the hole 102 side, as shown in FIG. 11(I), a counterbore hole 112D is formed at a different position from the B-B cross-section side, which is again divided into six places. Next, the present invention will be explained in detail. First, the operation in a neutral state where no steering operation is performed will be explained with reference to FIG. Figure 12 shows the 7ii: EE flow path in a state in which no operating force is applied to the rotating shaft of the steering wheel fitted to the spline 26 of the sleeve 24. In this neutral state, Each of the right-hand holes 93 , 94 of the pulp member 22 is opposed to each of the right-hand holes 88 , 92 of the sleeve 24 , and the pulp member 22
The hole 91 is an annular groove on the outer periphery] 12? - a hole 8.4 in the sleeve 24 located on the T-boat side of the housing 10 through
On the other hand, the P boat 36 communicates with the pulp flow vr5: via the T boat 40 (7, therefore, all of the holes 52 connected to the mountain gap of the gerotor mechanism
l of

[Y pressure will be applied. Therefore, in such a neutral state (the flow of liquid from the hydraulic pump is such that the pressurized liquid is first supplied to the P port 36 from the P boat 36), it flows into the annular groove 80P of the sink 10. , the holes 93 and 94 in the Nureve 24 and the holes 88 and 92 in the pulp member are valved to open the dock horn 32.
This θ flows into the inside of the valve part 1 No. 22 which accommodates the
) The inner 1ytif hole 91 of the valve part 022 and the outer periphery annular 1'M' 112-:i- through the hole 8 of the sleeve 24
4, and is connected to the boat 40 through the hole 84+ of the sleeve 24 and the annular groove 80T. It's back to the side. Next, the steering wheel will be turned to the left and the steering wheel will be turned to the left. When you turn the steering wheel counterclockwise, turn the sleeve 2.
4 rotates to the left, forming a flow path between it and the pulp member 22 provided inside the sleeve 24. -4- When sleeve 24 rotates to the left, sleeve 2
The fourth hole 90 faces the center hole 104 of a communication hole 98 provided inside the valve opening 22 in the one-way direction. In addition, the pulp portion 1422K has a long communicating hole 10.
The hole 82 of the sleeve 24 corresponds to the hole 411 at the left end of the hole 07, and the hole 98 of the short communication hole 98 previously provided inside the valve member 22 corresponds to the hole 06 when viewed from the front cover 20 side in FIG. A housing IOK is formed in each of the interdental gaps located on the right side of the eccentric line 78 in the hotelier rotor mechanism when taken out as an end view, and the pulp member 220 is communicated with each other through the communication hole 52 in the Rtj+-) direction.
A series of long 1tft holes made in the Hakata round] 00 hole 1
10 is connected to the left side VC (the eccentric line 78θ in FIG. 14) through the communication hole 52 in the direction of +p (also provided in the housing IO) to the gap between the teeth where the gums are exposed. Therefore, l) Pressurized fluid to the boat 36 is supplied from the P port 36 to the housing] 0 right 11111 K position tj! ! , impaction 80i'. Hole 90 in sleeve 24 and hole in pulp member 22] 04 and 1lLa hole 98. The pressurized liquid reaches the communication hole 52 of the housing 10 through the hole 106, and is supplied to the interdental gap on the right side of the eccentric line 78 formed between the nutator 12 and the rotor 34 of the voisier rotor mechanism as shown in FIG. . By supplying the pressurized liquid to the gerotor rocks 11, the rotor 34 rotates counterclockwise and rotates clockwise as shown by the arrow, and the interdental gap on the left side of the eccentric line 78 contracts, causing the eccentric The shrinking interdental space F′i on the left side of line 78, as shown in the lower part of FIG.
4 of the longer dimension of the pulp member 22 through the communication hole 52 of 0
The pressurized liquid sent out from the gerotor mechanism passes from the hole 107 at the left end of the communication hole 100 in the pulp member 22 to the housing 1 through the hole 82 in the sleeve 24.
0 and is supplied to the actuator of the steering mechanism from the L boat 42. That is, the actuator 4 in the steering stirring mechanism shown in FIG.
A metered amount of liquid is supplied by the gerotor mechanism to the right side of actuators 48R and 48L.
48L is driven to the left in proportion to the left rotation of the steering wheel 712. When the actuators 48 R, 48 L are driven to the left in this way, the return liquid from the actuators 48 R, 48 L is supplied to the R bow) 38, and flows through the annular groove 80 R of the nozzle and the hole 86 of the sleeve 24. Nokurububu Monthly 22
It reaches the annular groove 112 through the counterbore hole 112D, and again communicates with the annular groove 80TK through the hole 84 of the sleeve 24, so that the liquid is returned from the T-boat 40 to the tank. On the other hand, due to the formation of the 01 seaway as shown in FIG.
When the rotor 34 of the gerotor mechanism rotates counterclockwise as shown in the figure, this rotation is transmitted to the pulp member 22 via the dosing pin 32, and the pulp member 22 follows the counterclockwise rotation of the sleeve 24. When the left rotation of the steering hole is stopped, the C actuator reaches a neutral position corresponding to FIG. 12, and the supply of pressurized fluid to the C actuator at a rate proportional to the steering operation is stopped. Next, referring to FIG. 15, the action when the steering link wheel is rotated clockwise will be explained. When the steering wheel is rotated clockwise, the flow path shown in FIG. 415 is formed when the steering sleeve 24 is rotated clockwise. In other words, when the sleeve 24 rotates clockwise from the neutral position, the annular groove 80P of the housing 10 communicating with the P port 36 opens into the hole 904 of the sleeve 904 and the valve member 2
The communicating hole 98 of the valve member 22 is connected to the hole 108 of the long communicating hole 100 of the valve member 22, while the communicating hole 98 of the valve member 22 has a short dimension.
A counterbore hole 112B, an annular hole 11 formed on the outer periphery of the valve member 22 and facing the hole 86 of the sleeve 24 through the
2 and the annular groove 80L of the housing 1° are communicated with the annular groove 80TK through the holes 82 and 84 of the sleeve 24. Therefore, as the liquid flows when the steering link wheel is rotated clockwise, the pressurized liquid supplied to the boat 36 from the hydraulic pump flows through the housing 100) and the annular groove 80P. Hole 90 of sleeve 24 and hole 10 of valve part i'A22
8 to long communication hole 100Vc, communication hole 1
Diagonal communication hole 52 of housing 10 from hole 110 of 00
FIG. 16 shows an end view taken from the front cover 20 side through 1--Eccentric line 78 in the gerotor mechanism.
It can be completely supplied to the interdental space located on the left side of the tooth. By supplying pressurized liquid to the interdental space located on the left side of this eccentric line 78! llI: The I-ta 34 rotates clockwise and revolves 111 (movement) to the left as shown by the arrow.
The interdental gap located on the right side of the eccentric line 78 contracts due to the revolution of the rotor 34, and a volume of pressurized liquid proportional to the amount of contraction is passed through the upper communication hole 52 in FIG. It is supplied to the short communication hole 98 of the valve member 22. This communication hole 98 is connected to the hole 8 of the sleeve 24 through the hole 102.
6, the pressurized liquid pumped out from the gerotor is completely supplied to the annular groove 80RK of the housing 10 through the hole 86 of the sleeve 24, and the R boat 3 is supplied from the annular groove 80R to the annular groove 80R.
Actuator 4 of the steering mechanism shown in FIG.
8 Supply pressurized liquid to the left side of R and 48L. Therefore, the actuators 48R and 48L are driven rightward in proportion to the amount of operation of the steering wheel. The liquid returned by the actuators 481 and 48 L being driven rightward is supplied to the L port 42 in FIG.
From the hole 82 of the sleeve 24 and the annular groove 112B and the annular groove 112 melted into the hole 82 of the sleeve 24 and the outer periphery of the valve member 22, the hole 84 of the sleeve 24 is reached again. It reaches 40Vc (T port) and is discharged to the tank side. On the other hand, the rotor 3 of the gerotor mechanism as shown in FIG.
Due to the right (b) υ rotation of 4, the dock bore 32 is valved and the valve member 22 is also rotated following the clockwise rotation of the sleeve 24, and the sleeve 24 is rotated clockwise by the steering wheel as shown in Fig. 1111. When the steering link wheel stops rotating clockwise while maintaining the flow path formed, the gerotor mechanism causes the valve member 22 to stop when it rotates to the neutral position relative to that shown in FIG. Hydraulic pressure supply to the actuator of the steering gear ri11 is stopped. Next, with reference to FIG. 17, a fail-safe operation will be explained when the pressurized liquid is not supplied properly due to failure of the hydraulic pressure source due to failure of the hydraulic pump or the like. In the event of a failure of the water source, the gerotor mechanism of the power steering device of the present invention operates as a pump that pressurizes the supply fluid pressure to the steering mechanism, and the operating force of the steering wheel is transferred to the gerotor. The pumping action of the mechanism is boosted to ensure steering operation in the event of failure.In order to realize the pumping action of the gerotor motor in the event of failure of the hydraulic pressure source, the first In the embodiment of the present invention shown in the figure, the housing 10 PE O) vltMK check valve] 20 valve membrane 20 connects the annular groove 80P of the P boat 36 formed in the housing 10 and the 1 m-shaped groove 80T of the T boat 40Q. I have to. So, let's take the case of rotating the steering wheel to the right in Figure 17 as an example of 1 when the ICE source fails.
[To explain the operation, the flow path formed by the rightward rotation of the sleeve 24 when the steering wheel is rotated to the right is the same as that shown in FIG. 15. - However, since the pressurized liquid is not supplied to the P bow 36, the mechanical rotation of the sleeve 24 is caused by contact with the torsion bar 58, which has a centering function, to the pulp part side. When the pulp member 22 is rotated by rotating the pulp member 22, the dog bone 32 is also rotated to rotationally drive the rotor 34 of the gerotor mechanism. To drive the rotor 34 of such a gerotor mechanism,
J: For the expanding interdental gap between the stator 12 and rotor 34 of the gerotor mechanism, there is a communicating hole 100 with a longer dimension on the pulp part moon side than the L bolt 42 or T boat 40, and the housing 10. Among the liquid sucked into the gerotor mechanism through the diagonally provided communication hole 52, the liquid existing in the interdental gap due to the rotation of the rotor 34 is pressurized. The short communicating hole 98 of the pulp member 22 and the hole 86 of the sleeve are further connected to the R boat 38 through the annular groove 80R% of the housing 10.
Pressurized by the rotation of the rotor 34 of the gerotor mechanism, which can be driven by turning the steering wheel to the right. 1+ is supplied to the actuator of the steering mechanism, so that even if the hydraulic pressure source fails, the steering mechanism can be driven by the boosting effect of the hydraulic pressure. On the other hand, the sleeve 24 and the pulp part side 22 constituting the pulp mechanism in the above embodiment are used to obtain a flow path formed by the sleeve 24 and the pulp member 22, as shown in FIGS. 5 and 8. As for the machining, the hole-drilling using a drill can be done in actual machining, and the formation of the opening groove running in the axial direction on the sliding contact surface of the sleeve 24 and the pulp member 22 is completely simplified. Furthermore, the opening of the machined hole is widened ['[4 drilling and IJlj machining are not required (both of which can secure a sufficient area for the C return path, greatly reducing the machining cost, and making the opening of the hole smaller than the opening groove in the conventional technique 48F). Since the opening area is sufficiently small, it is possible to significantly reduce fluid damage in the valve mechanism. The gerotor mechanism σ) rotor is rotated in the direction of the steering operation by supplying liquid pressure through the four cutting edges of the gerotor mechanism, and an amount of pressurized liquid proportional to the amount of steering operation is steered from the contracting interdental gap in this gerotor mechanism. In the power steering device that supplies the actuator of the mechanism, as a valve mechanism, a sleeve rotated by the steering operation is inserted outside the pulp member rotated by the rotor of the gerotor mechanism, and this The hydraulic flow path to the gerotor mechanism is changed by rotation of the sleeve by steering operation, and a flow path is formed in which the pulp is rotated 11 times in the sleeve by the operation of the gerotor, so that the flow paths formed in each of the sleeve and the pulp are The drilling of the hole can be realized by machining, and the hole is placed in the center like the valve mechanism of conventional equipment.
Compared to a power steering device in which the spool is rotated one turn by the steering operation and a gerotor follows and rotates the sleeve fitted onto the spool, the machine for forming the flow path is extremely simple, and Compared to open grooves, the flow path formed by hole machining has a smaller hydraulic surface X against the sliding contact area, so it can significantly reduce liquid leakage in the valve mechanism, resulting in high efficiency and The effect of realizing a device that is inexpensive in terms of cost can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional explanatory diagram of an embodiment of the present invention, FIG. 2 is a W, 1iHa side view of the gerotor mechanism of FIG. 1, and FIG. 3 is a sectional view of the housing shown in FIG. 1 taken out. Figure 4 is a congratulatory view of the boat 11411 in Figure 3, Figure 5 is a sectional view of the sleeve shown in Figure 1 taken out /T:L, Figure 6 is a right side view of Figure 5, and Figure 7 is 1d. A-A-G-Gl in Figure 5
@ side view, Figure 8 is a sectional view showing the valve member in Figure 1 taken out, Figure 9.10 is a left and right side view of Figure 8,
FIG. 11 is a cross-sectional view from A-A to J-J in FIG. 8, FIG. 12 is a cross-sectional view showing the flow path in a neutral state, and FIG. 13 is a cross-sectional view showing the flow path in counterclockwise rotation. Fig. 14 is an explanatory diagram showing the gerotor when rotating to the left, Fig. 15 is a sectional view showing the flow path when rotating to the right, Fig. 16 is an explanatory diagram of the gerotor when rotating to the right, and Fig. 17 is an explanatory diagram showing the gerotor when rotating to the right. FIG. 2 is an explanatory diagram illustrating the flow path when the hydraulic pressure source fails with respect to clockwise rotation of the steering wheel. ]0...Housing 12...Stator 14.
...End cover 16...Bolt 18...Retainer 2o...Front cover 22...Harz part side 24...Sleeve 26.30...Spline 32...Dock bone 34...Rotor
36...Pump hoard (P boat) 38...
・Light boat (Mo boat) 4o...Tank boat (T boat) 42...Left boat (L port)
44...'l('j, If water pump 6...tank 48R, 48L...actuator 50
...Plate 52...Communication hole 56...+a Notch 5 a...1・-Johnper 6
0... Suffling 62... X seal 64... Thrust washer 66... Thrust bearing 68.7
0.72...0 link 74...Roller 76...Eccentric shaft center 78...Eccentric line 80P, 80R, 80
T, 80L...Annular groove 82.84, 86, 88.9
0.92...Sleeve holes 91.93, 94, 96.
1(12,104,]06.108.110... Hole of valve member 98.100... Communication hole 112... Annular groove 11
2B, 1121)...Counterbore 120...Check valve Patent applicant Tokyo Keiki Co., Ltd. Patent attorney Susumu Takeuchi Figure 2 78 42 38 104 Figure 10 00

Claims (1)

[Claims] The rotor of the gerotor mechanism is rotated in the direction of the steering operation by supplying hydraulic pressure by completely changing the pulp mechanism linked to the steering operation, and the contracting liquid chamber of the gerotor mechanism is 1ull compared to the steering operation desire. In a power steering device that supplies an amount of pressurized fluid to an actuator of a steering mechanism. As the pulp mechanism, the rotor of the gerotor mechanism is connected to a pulp member disposed in the center of the housing, and a sleeve rotated by a steering operation is rotatably inserted outside the pulp member, and the rotation of the sleeve A power steering device characterized in that a switching flow path for causing the pulp to follow and rotate by supplying hydraulic pressure to the gerotor is formed in each of the pulp and the sleeve. (2) The switching channel is formed by machining the sleeve and the pulp member.
, the power steering device described in .