JP2832796B2 - Gerotor type hydraulic device having fluid passages composed of multilayer plates - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a housing and a rotor that performs an eccentric rotation while drawing a track inside the housing. The present invention relates to a gerotor-type hydraulic device configured to expand and contract a gerotor small chamber formed by the eccentric rotation of a rotor to discharge a fluid flowing into the device at a high pressure. Its primary use is in pumps, but it can also be used as a motor. 2. Description of the Related Art The principle of operation of a gerotor type hydraulic apparatus will now be described with reference to FIGS. [0003] A gerotor-type hydraulic device includes a housing 20.
And a rotor 28. The housing 20 is formed as a unit, and includes a stator 22 (a gerotor group) that radially surrounds the rotor 28, and a wear plate 21 that contacts one of both axially flat end surfaces of the rotor 28. ,
It has a manifold 23 and an end face cover 24 that are in contact with the other of the two end faces in the axial direction of the rotor 28. [0005] The rotor 28 is eccentrically disposed in the rotor cavity of the stator 22 of the housing 20 and is slidable with respect to both the wear plate 21 and the manifold 23. A plurality of gerotor chambers 29 are formed between the stator 22 and the rotor 28 as shown in FIG. The rotor 28 eccentrically rotates while drawing a trajectory by the rotational driving force via the drive shaft 44 and the swinging rod 38, and expands and contracts the gerotor small chamber 29. As a result, pressure is generated in the gerotor chamber 29, and between two fluid connections formed at one location of the housing 20, that is, between the inlet means (inlet) 30 and the outlet means (outlet) 31. , Causing high pressure in the fluid. The flow of the fluid from the housing 20 to the gerotor chamber 29 is transmitted through a communication passage 33 formed in the wear plate 21.
2 (FIG. 2), an annular groove formed on the opposite side of the wear plate 21, that is, an annular fluid passage 34 (FIG. 3) and the rotor 2
8, an annular fluid passage 37
(FIG. 4). Here, since the rotor 28 is eccentrically rotating, the annular fluid passage 37 and the annular fluid passage 34 communicate with each other in a part of the circumferential direction, and communication of the fluid into the gerotor small chamber 29 is ensured. . [0007] The gerotor-type hydraulic device described above has a problem that it is difficult to provide such a fluid passage in the housing because the fluid passage is complicated. SUMMARY OF THE INVENTION It is an object of the present invention to provide a gerotor type hydraulic apparatus which solves the above-mentioned problems. The present invention reduces the number of manufacturing operations required to manufacture a hydraulic device. The hydraulic device made in accordance with the present invention is simple, reliable and exhibits high efficiency. [0010] Other objects and advantages of the present invention will become apparent from the accompanying drawings and the description thereof. The essential features of the present invention are described in the appended claims. Although the present invention has been described as a pump using only one fluid inlet and one fluid outlet, high pressure fluid is now provided by simply reversing the fluid inlet and outlet. It will be readily understood by those skilled in the art of hydraulic systems of this type that, once introduced at the entrance, the hydraulic system of the same construction operates as a motor. The term "housing" as used in the following description and the appended claims includes not only the main housing member but also the pressure plate, gerotor assembly, manifold, and end cover, All of the latter components are connected to the main housing member by a plurality of bolts. FIG. 8 shows a hydraulic system in which a fluid port is directly connected to a manifold plate. In this device, the communication between the fluid port and the channel switching operation is realized between the end face of the rotor and the manifold plate 23D. In this device,
The fluid inlet / outlet 112 is formed through a ring groove 113 formed in the inner surface of the end plate 115, and a series of through holes 114 linearly penetrating all of the closing plate 116, each of the intermediate plates 117 and 118, and the manifold plate 23D. Connect to passage 119. The annular passage 119 communicates with the annular groove 37b of the rotor. The fluid inlet / outlet 120 is connected to a series of through holes 122 penetrating through the intermediate plates 117 and 118 and the manifold plate 23D through the through holes 121 of the closing plate 116. A series of through holes 122 communicate with the open center hole 35 of the rotor. The annular groove 37b and the passage 37A are connected to the annular groove 37.
Provides hydraulic equilibrium to the rotor for the fluid pressure at. The other end of the rotor's open center hole 35 provides hydraulic equilibrium to the open center hole fluid passage. The manifold plate has a series of openings 40 and 41.
Having. A series of openings 40 extend through the manifold plate. The through hole 127 connected to the opening 40 is an extension of the opening 40 penetrating the manifold plate. The opening 40 of each pair and the through hole 127 are connected to each other through a series of communication passages 108 formed in the intermediate plate 117. During operation of the device, the annular groove 37 of the rotor and the open center hole 35 selectively communicate with each opening or through hole 40 to switch its flow path. [0017] The actual outflow of manifold inlet and outlet opening hydraulic apparatus shown in FIG. 8 inlet passage sequentially superimposed series of each plate 1
Determined through the selective use of 15-118 and 23D. Each of the above plates is designed to be easily manufactured individually. See FIGS. During assembly, the plates are arranged in an appropriate sequence with respect to the other plates to form the desired outlet and inlet passages of the hydraulic system. If necessary, a sealing element can be interposed between the plates to ensure that leakage between adjacent passages is within an acceptable amount, in which case the plates form a single unit after assembly. Should be welded together or other suitable sealing measures should be taken. It should be noted that claim 11 is the present invention
The gerotor type having a fluid passage composed of a multilayer plate
This document describes the specific features of the
In claim 11, "a plurality of intervals having a certain cross-sectional area
The “placed bidirectional flow path” is, for example, an open state in FIG.
7 extending in an arc from the mouth 40 to the through hole 127
Of the communication passage 108. Also, "Multiple flats
The “plate” means, for example, the intermediate plates 117 and 118 in FIG.
And the manifold plate 23D. In addition, "
"Fixing means for connecting the unit to the entire device"
For example, means such as a well-known “bolt” is used.
0 is indicated by round hatching at the four corners. next,
A thirteenth aspect of the present invention relates to “the fluid passage formed of a multilayer plate”.
Gerotor type hydraulic device ”
Described the configuration related to the characteristics of the communication and valve action
Here, the term “engage in a certain plane” specifically means
Is between the end face of the rotor and the end face of the manifold plate 23D.
Engagement refers to "a pair of flow passages contained in the rotor.
The “passage” is, for example, an open center hole 35 in FIG.
It is an annular groove 37. Also, “first communication means”,
"Second communication means" includes a series of through holes 12 respectively.
2. The annular fluid passage 119. In addition, "Bal
The "stop means" is a series of openings 40 and 41.
And "a plurality of fluid passages in the housing"
For example, a series of through holes 121, a series of through holes 114,
Passage 108, "a series of three or more
Plate ”means the intermediate plates 117 and 118 and the manifold plate 2
3D . FIG. 13 shows a hydraulic device of the type in which fluid inlets and outlets are arranged on a number of intermediate plates. This device is incorporated in the power steering unit 127. FIG. 19 shows a similar unit 127a having a multilayer board body structure.
The functions of the fluid passages inside these multilayer plate structure devices are the same. Therefore, each of these devices will be described collectively. The fluid passages arranged around the sliding members 129, 129a as a number of annular recessed grooves 128, 128a include a second cylinder (C2), a second return (R2), a first cylinder (C1), First intermediate (M1), second pressure (P
2) The order of the first return (R1) and the first pressure (P1). The first cylinder (C1) and the second cylinder (C
Each passage of 2) is a power steering unit 127, 1
27a, each passage 150, 151 and each fluid port 15
2, 153 and a high-pressure hose (not shown) are connected to both ends of a double-acting control cylinder (not shown). Each passage of the first pressure (P1) and the second pressure (P2) corresponds to each passage 154, 15 of the power steering unit 127, 127a.
5, a fluid inlet 156, and a high-pressure hose connected to a high-pressure outlet of a hydraulic pump driven by an engine (not shown). Each passage of the first return (R1) and the second return (R2) passes through the passage 157 and the passage 158 of the power steering units 127 and 127a, the fluid outlet 159, and the high pressure hose, and the low pressure of the hydraulic pump (not shown). Connected to the entrance. Power steering units 127 and 12
The center passage 131 of 7a communicates with the drive hole 141 of this device and the inner fluid passage. Power steering unit 1
The first intermediate (M1) passage at 27, 127a communicates with the through passage 130 and the outer fluid passage of the device. In operation, the selective rotation of the input shaft 142 is limited to the axial movement of the sliding members 129, 129a via the pin helical groove connection 143 within the limits of movement allowed by the torsion spring connection 144 with the wobble rod 145. It is converted to motion, but only to direct rotation of the rocking bar thereafter. By the axial movement of the sliding members 129, 129a, the annular recessed grooves 128, 128a are formed in the respective passages 130, 129a.
131 is selectively connected. In the rotational position shown in FIG. 13 , the passage 130 is connected to the second pressure (P2) passage via the first intermediate (M1) passage, and the unit 12
7 is connected to the second cylinder passage. The fluid from the through passage 130 is supplied to each of the plates 133, 1
Through the through passages 132 of the first and second plates 136 and the communication passage 138 of the next plate 136, the water flows into seven outer through holes 139 arranged annularly in the last plate 137. The fluid from each outer through-hole 139 of the plate 137 communicates with some of the seven inner through-holes 34 arranged annularly inside the outer through-hole 139 via the adjacent annular groove 37. Each inner through hole 34 penetrates each plate 137, 136 and 135 and communicates with seven spiral passages 140 formed in the next plate 134, and each spiral passage 140 has seven through holes 41. Communicate with one of the Each through hole 41
All pass through the plates 135, 136 and 137 and finally open into the respective chambers of the gerotors of the units 127, 127a. Each outer through-hole 139 communicates with each through-hole 41 on the side connected to each gradually increasing chamber of the gerotor through each through-hole 34, but is connected to each gradually decreasing chamber. The fluid from each of the through holes 41 on the side of the unit is in direct communication with the center passage 131 of this unit via a drive shaft 141 at the center of the rotor. When rotating in the opposite direction, everything is reversed. FIG. 19 shows a state in which the motor is in a neutral position where the motor does not rotate. Each of the plates 133 to 1 in these hydraulic devices is
37 are welded together to form an integral unitary structure. In the hydraulic device shown in FIG. 13, each fluid inlet / outlet and each annular concave groove (P1, R1, P2, M1, C1, R) in the main body 127 of the power steering unit are provided.
2 and C1) and all the fluid passages connecting them must be cast and / or machined. This involves a number of time and labor consuming manufacturing operations. In another device, shown in FIG. 19, a series of plates 146 forming part of the housing 127a of the device.
Is the fluid inlet / outlet of this device and each annular concave groove (P1, R1,
The structure of each fluid passage between P2, M1, C1, R2 and C1) is simplified. By adding a series of plates 147,
The structure of each fluid passage connecting the through-hole 130 to each small chamber of the gerotor is also simplified. Each individual plate in each series of plates 146, 147 is to be easily manufactured individually (usually by stamping) and to reduce the number of remaining parts of the device or to simplify its construction. Designed. (For example, in the device disclosed herein, each fluid passage 14 of the housing 127a is
8 and 149 are designed so that they can be manufactured with a single drilling operation that drills vertically from the flat surface of the housing 127a). Each series of plates 146 and 147 are then joined together to form a respective integral unitary structure. Each of the gerotor fluid inlet / outlet plates 147;
Since each of the steering unit body plates 146 has a multilayer plate structure, the manufacturing cost can be greatly reduced, and the flexibility for various power steering units can be increased. While the preferred embodiment of the invention has been illustrated and described as above, this is by way of example only and should not be construed as limiting.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a central longitudinal sectional view of a gerotor type hydraulic device for illustrating an operation principle. FIG. 2 is a cross-sectional view as viewed from a direction indicated by an arrow finger line 2-2 in FIG. FIG. 3 is a cross-sectional view as viewed from a direction indicated by an arrow finger line 3-3 in FIG. 1; FIG. 4 is a cross-sectional view as viewed from the direction indicated by arrow 4-4 in FIG. 1; 5 is a transverse cross-sectional view as viewed from a direction indicated by an arrow finger line 5-5 in FIG. 1, and FIG. 5A is a partial cross-sectional view as viewed from a direction indicated by an arrow finger line 5A-5A in FIG. FIG. 6 is a transverse cross-sectional view as viewed from a direction indicated by an arrow finger line 6-6 in FIG. 1; FIG. 7 is a transverse cross-sectional view as seen from the direction indicated by arrow 7-7 in FIG. 1; FIG. 8 is a central longitudinal sectional view of the gerotor type hydraulic apparatus according to the embodiment of the present invention. FIG. 9 is a view taken in a direction indicated by an arrow finger line 9-9 in FIG. 8;
FIG. 3 is a cross-sectional view showing one end surface of the manifold plate of FIG. FIG. 10 is an end view showing the other end surface of the manifold plate of FIG. 8 as viewed from a direction indicated by an arrow finger line 10-10 in FIG. 8; FIG. 11 is an end view showing the outer end surface of the passage closing plate of FIG. 8 as viewed from the direction indicated by arrow line 11-11 in FIG. 8; FIG. 12 is an end view showing the inner end face of the end plate of FIG. 8 as viewed from the direction indicated by the arrow line 12-12 in FIG. 8; FIG. 13 is a central longitudinal sectional view showing an intermediate plate gerotor fluid inlet / outlet passage. FIG. 14 is a cross-sectional view showing a cross section of the fluid inlet / outlet passage of FIG. 13 as viewed from a direction indicated by an arrow 14-14 in FIG. 13; FIG. 15 is a cross-sectional view showing the next part of the fluid inlet / outlet passage of FIG. 13 as viewed from the direction indicated by arrow 15-15 in FIG. 13; FIG. 16 is a sectional view showing a further portion of the fluid inlet / outlet passage of FIG. 13 as viewed from a direction indicated by an arrow finger line 16-16 in FIG. 13; FIG. 17 is a cross-sectional view showing another part of the fluid inlet / outlet passage of FIG. 13 as viewed from a direction indicated by arrow line 17-17 in FIG. 13; FIG. 18 is a cross-sectional view showing a further portion of the fluid inlet / outlet passage of FIG. 13 as viewed from a direction indicated by an arrow 18-18 in FIG. 13; FIG. 19 is a central longitudinal sectional view showing another unit similar to the power steering unit shown in FIG. 13; 20 is an end view showing one of the multilayer boards of FIG. 19 viewed from a direction indicated by an arrow 20-20 in FIG. 19; FIG. 21 is an end view showing another sheet of the multilayer board of FIG. 19 as viewed from a direction indicated by an arrow 21-21 in FIG. 19; FIG. 22 is an end view showing still another one of the multilayer boards in FIG. 19, as viewed from a direction indicated by an arrow finger line 22-22 in FIG. 19; FIG. 23 is an end view showing still another different one of the multilayer boards in FIG. 19 as viewed from a direction indicated by arrow lines 23-23 in FIG. 19; [Description of Signs] 20; 60: Main housing 21; 61: Wear plate 22; 62: Gerotor set 23: 63: Manifold plate 27; 62a: Stator 28; 72: Rotor 29; 80: Small chamber 30; 66: Fluid inlet 31; 85: fluid outlet 38; 71: rocking rod 44; 70: drive shaft 127; 127a: power steering unit

────────────────────────────────────────────────── (5) References JP-A-54-17505 (JP, A) US Patent 3,106,163 (US, A) US Patent 4,219,313 (US, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F04C 2/10 F03C 2/08

Claims (1)

(57) [Claims] A gerotor-type hydraulic device having a plurality of fluid passages disposed within a housing of the device and a rotor cavity following each of the fluid passages, selectively and continuously positioned next to the rotor cavity and fixed to the housing. Gerotor type hydraulic device, characterized in that it has three or more plates, each said fluid passage being in each said plate. 2. 2. The gerotor type hydraulic apparatus according to claim 1, wherein the hydraulic apparatus is used together with a power steering unit, the power steering unit including a plurality of entrances and exits separate from the gerotor type hydraulic apparatus, and a plurality of flow path switching units. A multi-layer board having a main body having a passage and a plurality of fluid passages connecting between the respective switching passages, wherein the main body of the power steering unit is disposed substantially at the position of the respective passage switching passage. A gerotor-type hydraulic device, comprising a structure, wherein the multilayer plate includes substantially all of the flow path switching passages and the fluid passages of the unit. 3. 2. The gerotor type hydraulic device according to claim 1, wherein the hydraulic device is a power steering device having a plurality of inlets and outlets, a plurality of flow passage switching passages, and a plurality of fluid passages formed therein so as to connect between the switching passages. Wherein the multi-layer board includes substantially all of the passage switching passages and the fluid passages of the device. A gerotor-type hydraulic device, characterized in that: 4. The gerotor type hydraulic device according to claim 1, wherein the device has a swivel valve having an input / output valve portion,
The plurality of fluid passages include a plurality of spaced bi-directional flow paths for connecting the input / output valve portion to the gerotor chamber, wherein the plurality of plates are flat, such that the flat surfaces contact each other. The gerotor type hydraulic device is located. 5. The gerotor type hydraulic apparatus according to claim 4, wherein the passage extends in the plate in the axial direction and the radial direction. 6. 5. The gerotor type hydraulic apparatus of claim 4, wherein the passage includes a passage that is not accessible from outside the housing. 7. The gerotor type hydraulic apparatus according to claim 4, wherein the plurality of plates are connected as one unit, and the unit is fixed so as to constitute a housing of the apparatus. 8. The fluid passage has a cross-sectional area, and the plurality of plates are formed with a portion of a selective cross-sectional area of the fluid passage;
The gerotor type hydraulic device according to claim 4. 9. It said plate is welded to form the single units, gerotor type hydraulic device according to claim 4. 10. 5. The gerotor type hydraulic apparatus of claim 4, wherein the passage includes a closely spaced passage. 11. A gerotor-type hydraulic device having a main body, a gerotor chamber, a rotor in a rotor cavity, a rotor valve portion, and a fluid passage in the device body following the rotor cavity, wherein the fluid passage includes an input / output valve portion in the rotor and the gerotor. A plurality of spaced bidirectional flow paths having a cross-sectional area for coupling to the chamber, some of the bidirectional flow paths being inaccessible from outside the device body; A portion of the device comprises a plurality of flat plates, wherein the flat plates define a portion of a selective cross-sectional area of the fluid passage, the plates being flat surfaces following the rotor cavity. The plates are joined together to form one unit with fluid passages extending in the axial and radial directions, and the plate includes fixing means for connecting the unit to the apparatus body. , Gerotor type hydraulic device. 12. 12. The gerotor type hydraulic apparatus of claim 11, wherein the gerotor hydraulic apparatus is a power steering unit, the second body having a steering valve, a fluid port, and a second set of spaced fluid passages having a cross-sectional area. Wherein the second set of fluid passages includes a valve flow path between the steering valve and a fluid port, and a central flow path between the steering valve and the rotor valve. Includes a second set of multi-layer boards, wherein the second set of multi-layer boards is formed with a portion of a selective cross-sectional area of the second set of fluid passages; A set of the second plates are successively arranged with flat surfaces following the steering valve, and the second set of plates are joined together to form the second passage and a second set of plates is formed. Forming a knit, said second passage extending axially and radially into said second set of plates, comprising fixing means for connecting said second plate unit to said device; , Gerotor type hydraulic device. 13. A gerotor-type hydraulic device having a rotor in a housing, a fluid input / output section, a gerotor chamber, and a rotor cavity, the rotor having a flat axial end face engaged with the housing and rotated in a certain plane, wherein the rotor is disposed therein. Having a pair of flow passages included,
One of the flow passages surrounds the other flow passage, and first communication means for connecting one of the pair of flow passages to one of the fluid input / output portions on the surface, and the other on the same surface. And second communication means for connecting the flow passage to the other fluid input / output portion, so that the communication and the valve operation occur on one side of the rotor, on the same surface in the housing, A valve means for selectively connecting the pair of flow passages to the gerotor chamber; wherein the gerotor type hydraulic device has a plurality of fluid passages in a housing of the device; And the valve means are connected to the first communication means and the second communication means, and the valve means is connected to the gerotor chamber, respectively. The three pieces are arranged continuously on one side of the rotor cavity. Or It has over a series of plates are substantially all of said fluid passages, characterized in that in said plate, gerotor type hydraulic device. 14． 5. The gerotor type hydraulic apparatus of claim 4, wherein said swivel valve is integral with said rotor.