VARIABLE PUMP, DRIVE DEVICE FROM THE PUMP AND DRIVE METHOD FOR THE DRIVE DEVICE

Description

BACKGROUND OF THE INVENTION1. Field of the Invention

[0001] The present invention relates generally to a pump with variable suction / discharge amount and a drive device composed of the pump and a driving method thereof, and more particularly to a rotary vane pump composed of a fixed wall member, a movable wall member, a movable vane chamber sleeve and a vane rotor. The rotary vane pump has a vane chamber, which is extendable / retractable in an axial direction of the vane rotor to change the capacity of the vane chamber. Accordingly, the vane chamber is extendable / retractable to change the capacity of the space to form the pump with variable suction / discharge amount. In addition, at least two pumps with variable suction / discharge amount can be assembled in communication with each other to form an active drive device and a passive drive device. Moreover, in the principle that the driving force and the load resistance must be balanced, during the operation process, the drive device can automatically adjust the rotational speed ratio between the active pump and the passive pump as a transmission drive device.2. Description of the Related Art

[0002] The conventional pumps can be generally classified into two major types, that is, the pump with constant suction / discharge amount and the pump with variable suction / discharge amount. The pump with variable suction / discharge amount has wider application range and thus is popularly employed in relevant industries. With respect to the structural form, the pump with variable suction / discharge amount can be further classified into two types, that is, piston-type pump with variable suction / discharge amount and rotary vane pump with variable suction / discharge amount. The piston-type pump with variable suction / discharge amount generally has a rotary swash plate with variable angle. In rotation, the swash plate sequentially pushes multiple piston-type cylinder blocks arranged substantially in parallel to each other. Fig. 1 shows a conventional rotary vane pump with variable suction / discharge amount. The rotary vane pump mainly includes a vane rotor 10 disposed in a cam ring 11 inside the pump 1. An eccentric amount adjustment member 12 is disposed on one side of the cam ring 11 to push the cam ring 11 and adjust the eccentric amount of the eccentric amount adjustment member 12 to the vane rotor 10. The eccentric amount is adjustable so that the fluid receiving space between the vane rotor 10 and the cam ring 11 can be modulated so as to vary the suction / discharge amount of the pump.

[0003] However, the cam ring 11 is mounted in the pump 1 so that the adjustable displacement amount is limited within the fixed space of the housing of the pump. The size of the internal space of the housing directly affects and restricts the radial sizes of the pump body and all the components. As a result, when it is necessary to manufacture different products with maximal suction / discharge amount, the commonality of the components of the different pumps with different suction / discharge amounts is quite low. Therefore, it is necessary redesign numerous components of each new pump with maximal suction / discharge amount and manufacture the molds for molding the components. As a result, the manufacturing cost is greatly increased. In addition, in operation, in case the distance between the suction side and the discharge side of the pump is relatively long, then the pressure difference between the suction side and the discharge side will be excessively great. Under such circumstance, the reciprocal radial extension / retraction displacement amount of the respective vanes may be too large. This will lead to ill affection of vibration or collision noise.

[0004] US 1 527 685 A discloses a rotary motor or pump of the radial vane type for hydraulic gears comprising a case, a drum therein fixed to a shaft, a bipartite annular working space surrounding said drum, axially adjustable separating members subdividing the working space, and an axially adjustable sleeve in said annular working space and turning with the drum.

[0005] DE 20 61 385 A1 discloses a vane cell pump or vane cell motor with a lifting ring and rotor arranged therein and with vanes arranged in radial guide slots of the rotor, which slide against the lifting ring at least during rotor rotation, and pressure zones and suction zones provided between the lifting ring and the rotor. The rotor projects beyond the lifting ring in the axial and radial direction on at least one end face of the lifting ring and the guide slots are also contained in at least a partial area of the projecting rotor part and the vanes project into these extended guide slots.

[0006] US 4 551 080 A discloses a variable displacement sliding vane pump / hydraulic motor comprising a housing which forms an eccentric chamber and a contiguous concentric chamber and contains a fluid inlet port and a fluid outlet port, a sliding wall which sits slideably inside said eccentric chamber and which contains a rotor chamber which is concentric with said concentric chamber, a rotor assembly comprising a hub which fits rotatably inside said concentric chamber and a rotor which fits rotatably inside said rotor chamber, and which contains a plurality of radial slots, a shaft which is attached concentrically to said rotor assembly, a plurality of sliding vanes which slideably fit into said radial slots in said rotor assembly, tensioning means which impress said sliding vanes outward in radial direction, lateral tensioning means which impress said sliding vanes in a direction parallel to the center line of said rotor assembly, end plates which enclose the ends of said housing to prevent fluid loss therefrom, and a means to slideably position said sliding wall within said eccentric chamber.SUMMARY OF THE INVENTION

[0007] It is therefore a primary object of the present invention to provide a novel rotary vane pump with variable suction / discharge amount to solve the above problems existing in the conventional pump with variable suction / discharge amount. The vane chamber of the pump is extendable / retractable in an axial direction of the vane rotor to modulate the capacity of the vane chamber. Accordingly, the unit circulation suction / discharge amount of the fluid in the pump can be increased / decreased with the axial change of the space of the vane chamber. Therefore, when it is necessary to manufacture different pumps with different suction / discharge amounts, the radial specifications of the respective components are in conformity with each other so that the community in use of the components is enhanced and the manufacturing and material costs of different pumps with suction / discharge amounts are greatly lowered. Moreover, when the requirement for the maximal suction / discharge amount of the pump is increase, it is only necessary to modify the axial size of the pump and the relevant components .

[0008] It is a further object of the present invention to provide a transmission drive device composed of at least two pumps with variable suction / discharge amount. The two pumps are oppositely arranged. The fluid suction passage of one of the two pumps is in communication with and assembled with the fluid discharge passage of the other of the two pumps to form a closed active / passive drive loop. During the driving operation process of the loop, when a difference value exists between the driving force of the active pump and the load resistance of the passive pump, the difference value pushes and acts on the extendable / retractable vane chamber of the vane chamber body, whereby the capacity of the vane chamber of the active pump and the capacity of the vane chamber of the passive pump are automatically extended / retracted and modulated until the driving force applied to the fluid in the active pump and the load resistance pushed by the fluid in the passive pump are balanced. Also, in the operation condition that the fluid suction amount and the fluid discharge amount of the active pump and the passive pump are nearly equal to each other in any instant, the capacities of the vane chambers and the rotational speeds between the active pump and the passive pump are automatically balanced and adjusted to be in inverse proportion to each other so as to achieve the object of stable transmission driving.

[0009] To achieve the above and other objects, the pump with variable suction / discharge amount of the present invention includes a vane chamber body and a vane rotor disposed in the vane chamber body. The vane chamber body is at least composed of a fixed wall member, a movable wall member and a movable vane chamber sleeve, which define a vane chamber. The vane chamber has at least one eccentric vane chamber section therein. The vane rotor has an impeller disposed in the vane chamber. At least one vane is disposed on the impeller. One side of the vane is a suction side, while the other side is a discharge side. The movable wall member and the movable vane chamber sleeve are displaceable in an axial direction of the vane rotor relative to the fixed wall member, whereby the vane chamber is extendable / retractable in the axial direction of the vane rotor to increase / decrease the capacity of the vane chamber.

[0010] In the above pump with variable suction / discharge amount, the fixed wall member has a fixed wall end face. The fixed wall end face is disposed at one end of the fixed wall member. The fixed wall member is capped on a base seat of a support body. The fixed wall end face can be tightly attached to an end face of the impeller of the vane rotor normal to the axial direction of the vane rotor. The movable vane chamber sleeve can be fitted on the fixed wall member around the vane rotor. The movable wall member is formed with vane receiving slots. The number of the vane receiving slots is equal to the number of the vanes. A fitting hole is formed at a center of the movable wall member. The fitting hole of the movable wall member is fitted on the impeller of the vane rotor. The vanes on the impeller can slide within the vane receiving slots of the movable wall member. The movable wall member is tightly attached to the movable vane chamber sleeve and can synchronously move in the axial direction of the vane rotor with the movable vane chamber sleeve to change the capacity of the vane chamber. A rotor shaft end of the vane rotor passes through the fixed wall member. At least one of the rotor shaft ends is pivotally supported on a support body and at least one of the rotor shaft ends outward outputs power or bears power.

[0011] In the above pump with variable suction / discharge amount, the fixed wall member is fitted on a base seat of the support body (at one end).

[0012] The base seat has a fixed wall end boss. The fixed wall end boss is fully plugged in a fixed wall hole formed at a center of the fixed wall end face, whereby a boss end face of the fixed wall end boss and the fixed wall end face together form a fixed wall face and the fixed wall face can tightly attach to an end face of the vane rotor normal to the axial direction of the vane rotor. An eccentric rotor shaft hole is formed on the fixed wall end boss. A shaft end of the vane rotor is pivotally fitted in the eccentric rotor shaft hole.

[0013] In the above pump with variable suction / discharge amount, at least two fluid suction / discharge passages are formed in the vane rotor. One end of each suction / discharge passage, which end is directed to the vane chamber, is in communication with a suction side and a discharge side of the vane of the vane rotor. One end of each suction / discharge passage, which end is distal from the suction side and the discharge side, is in communication with at least one of two rotor shaft ends of the vane rotor.

[0014] In the above pump with variable suction / discharge amount, at least two suction / discharge passage openings are disposed on the impeller of the vane rotor. At least one of the suction / discharge passage openings is in communication with the suction side of the vane. At least one of the suction / discharge passage openings is in communication with the discharge side of the vane. Both the suction / discharge passage openings are in communication with outer side of the vane chamber.

[0015] In the above pump with variable suction / discharge amount, a sealing block is disposed at inter-contacting sections of the vane, the movable wall member and the movable vane chamber sleeve to seal the gap between the inter-contacting sections of the three parts (the vane top edge, the movable wall member and the movable vane chamber sleeve), whereby the fluid in the vane chamber is prevented from leaking.

[0016] In the above pump with variable suction / discharge amount, at least one pump with variable suction / discharge amount is connected and assembled to form a drive device with variable suction / discharge amount. In the drive device with variable suction / discharge amount, the sum of the areas of the movable wall faces on the suction sides of all the vanes contained in the eccentric vane chamber sections is equal to the sum of the areas of the movable wall faces on the discharge sides of all the vanes contained in the eccentric vane chamber sections.

[0017] In the above pump with variable suction / discharge amount, at least one pump with variable suction / discharge amount is connected and assembled to form a drive device with variable suction / discharge amount. In the drive device with variable suction / discharge amount, each pump has a four-time number of vanes and a number of eccentric vane chamber sections, which number is more than or equal to the number of the vanes. In the drive device with variable suction / discharge amount, each vane has another vane, the angle phase of which is 180-degree different from the angle phase of the vane, that is, the vane and the other vane have a complementary relationship.

[0018] In the above pump with variable suction / discharge amount, at least one pump with variable suction / discharge amount is connected and assembled to form an active pump and at least one pump with variable suction / discharge amount are connected and assembled to form a passive pump. The active pump and the passive pump are further connected with each other to form an active / passive closed loop as a transmission drive device.

[0019] In the above transmission drive device, the sum of the areas of the movable wall faces on the suction sides of all the vanes contained in the eccentric vane chamber sections of the active pump and the passive pump is equal to the sum of the areas of the movable wall faces on the discharge sides of all the vanes contained in the eccentric vane chamber sections of the active pump and the passive pump.

[0020] In the above transmission drive device, at least one of a same-direction displacement connection member and a synchronous displacement connection member is connected between at least one of the movable wall member and the movable vane chamber sleeve of the active pump and at least one of the movable wall member and the movable vane chamber sleeve of the passive pump.

[0021] In the above transmission drive device, a displacement resistant member is additionally arranged in at least one of the increasing direction of the capacity of the vane chamber of the active pump and the decreasing direction of the capacity of the vane chamber of the passive pump.

[0022] In the above transmission drive device, the active pump is composed of multiple pumps with variable suction / discharge amount and all the pumps with variable suction / discharge amount are synchronously driven by a common engagement member. The passive pump is also composed of multiple pumps with variable suction / discharge amount and all the pumps with variable suction / discharge amount are synchronously driven by a common engagement member.

[0023] In the driving method employing the above drive device with variable suction / discharge amount, in a closed loop, at least one pumps with variable suction / discharge amount are assembled to form a drive device. A fluid is input into the vane chamber of the drive device. The input fluid pushes one side of the vane in the vane chamber to drive the vane rotor to rotate. At the same time, the fluid on the other side of the vane in the vane chamber is pushed out of the vane chamber by the vane to form a driving loop. The movable wall member and the movable vane chamber sleeve of the drive device are synchronously displaced in the axial direction of the vane rotor relative to the fixed wall member so as to change the capacity of the vane chamber of the drive device. Therefore, the amount of the fluid discharged from the vane chamber and the amount of the fluid sucked into the vane chamber are changed each time the vane rotor rotates by one circle. In addition, under the requirement that constant amount of fluid flows per unit time, when the capacity of the vane chamber is enlarged, the rotational speed of the vane rotor is slowed down, while when the capacity of the vane is minified, the rotational speed of the vane rotor is increased. That is, the rotational speed of the vane rotor is in inverse proportion to the capacity of the vane chamber after changed.

[0024] In the above driving method of the above drive device with variable suction / discharge amount, at least one of the movable wall member and the movable vane chamber sleeve in the drive device is forcedly pushed by an external force to make the movable wall member and the movable vane chamber sleeve synchronously displace in the axial direction of the vane rotor.

[0025] In the above driving method of the above transmission drive device, one of the pumps is set an active pump, while the other of the pumps is set a passive pump. The active pump and the passive pump are assembled to form a closed driving loop. The amount of the fluid in the closed loop is constant and unchanged. When the capacity of the vane chamber of the active pump is increased, the capacity of the vane chamber of the passive pump is reversely decreased. Therefore, in the condition that a constant amount of fluid flows within the closed loop per unit time, the rotational speed of the vane rotor of the active pump is slowed down, while the rotational speed of the vane rotor of the passive pump is increased. The rotational speed of the vane rotor of the active pump is in inverse proportion to the rotational speed of the vane rotor of the passive pump. Reversely, when the capacity of the vane chamber of the active pump is decreased, the capacity of the vane chamber of the passive pump is increased. In the condition that a constant amount of fluid flows within the closed loop per unit time, the rotational speed of the vane rotor of the active pump is increased, while the rotational speed of the vane rotor of the passive pump is slowed down. The rotational speed of the vane rotor of the active pump is also in inverse proportion to the rotational speed of the vane rotor of the passive pump.

[0026] In the above driving method of the above transmission drive device, at least one of the movable wall member and the movable vane chamber sleeve in the active pump and the passive pump are forcedly pushed by an external force to make the movable wall members and the movable vane chamber sleeves of the active pump and the passive pump synchronously displace in the axial direction of the vane rotor. The displacement distance of the movable wall member and the movable vane chamber sleeve of the active pump is equal to the displacement distance of the movable wall member and the movable vane chamber sleeve of the passive pump.

[0027] In the above driving method of the above transmission drive device, the amount of the fluid in the closed loop is constant and unchanged so that the capacity of the vane chamber of the active pump and the capacity of the vane chamber of the passive pump are synchronously changed in a complementary relationship. That is, when the movable wall member and the movable vane chamber sleeve of the active pump synchronously displace in the axial direction of the vane rotor toward the fixed wall member to minify the capacity of the vane chamber, the movable wall member and the movable vane chamber sleeve of the passive pump synchronously displace in the axial direction of the vane rotor away from the fixed wall member to enlarge the capacity of the vane chamber. The displacement distance of the movable wall member and the movable vane chamber sleeve of the active pump is equal to the displacement distance of the movable wall member and the movable vane chamber sleeve of the passive pump. Reversely, when the movable wall member and the movable vane chamber sleeve of the active pump synchronously displace in the axial direction of the vane rotor away from the fixed wall member to enlarge the capacity of the vane chamber, the movable wall member and the movable vane chamber sleeve of the passive pump synchronously displace in the axial direction of the vane rotor toward the fixed wall member to minify the capacity of the vane chamber. The displacement distance of the movable wall member and the movable vane chamber sleeve of the active pump is equal to the displacement distance of the movable wall member and the movable vane chamber sleeve of the passive pump.

[0028] The driving method employing the above transmission drive device includes steps of: (1) making the transmission drive device operate and causing a difference value between the driving force of the active pump and the load resistance born by the passive pump; (2) under the action of the difference value between the driving force and the load resistance, the movable wall members and the movable vane chamber sleeves of the active pump and the passive pump being pushed by the push force and drawn by the vacuum sucking force produced in the vane chambers, whereby the movable wall members and the movable vane chamber sleeves of the active pump and the passive pump synchronously displace so that the capacities of the vane chambers of the active pump and the passive pump are automatically modulated and changed under the action of the difference value between the driving force and the load resistance; and (3) due to the balancing effect of the force, the capacities of the vane chambers of the active pump and the passive pump in the closed loop are eventually automatically modulated into a state that the driving force of the active pump is equal to the load resistance of the passive pump, at this time, the capacities of the vane chambers and the rotational speeds of the active pump and the passive pump being also automatically adjusted to be in inverse proportion to each other in operation.

[0029] The present invention can be best understood through the following description and accompanying drawings, wherein:BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Fig. 1 is a sectional view of a conventional pump with variable suction / discharge amount, showing the structure thereof; Fig. 2 is a perspective exploded view of a first preferred embodiment of the present invention; Fig. 3 is a perspective partially assembled view of the first preferred embodiment of the present invention according to Fig. 2; Fig. 4 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, showing that the space of the vane chamber is relatively smaller than the space of the vane chamber of Fig. 4-1; Fig. 4-1 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, showing that the space of the vane chamber is relatively larger than the space of the vane chamber of Fig. 4; Fig. 5 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, showing that a forcing mechanism is used to drive the movable wall member; Fig. 6 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, showing that the suction passage and discharge passage respectively communicate with outer side via two shaft ends of the vane rotor; Fig. 7 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, showing that an active pump is assembled with a passive pump, wherein a same-direction displacement connection member is connected between at least one of the movable wall member and the movable vane chamber sleeve of the active pump and the passive pump; Fig. 7-1 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, showing that two active pumps are assembled with two passive pumps, wherein a same-direction displacement connection member is connected between at least one of the movable wall member and the movable vane chamber sleeve of the active pump and the passive pump; Fig. 7-2 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, showing that four active pumps are assembled with four passive pumps, wherein a synchronous displacement connection member is connected between at least one of the movable wall member and the movable vane chamber sleeve of the active pump and the passive pump; Fig. 7-3 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 7, wherein a displacement resistant member is additionally arranged in the increasing direction of the capacity of the vane chamber of the active pump and a same-direction displacement connection member is connected between at least one of the movable wall member and the movable vane chamber sleeve of the active pump and the passive pump; Fig. 7-4 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 7, wherein a displacement resistant member is additionally arranged in the decreasing direction of the capacity of the vane chamber of the passive pump and a same-direction displacement connection member is connected between at least one of the movable wall member and the movable vane chamber sleeve of the active pump and the passive pump; Fig. 8 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, wherein two pumps are assembled to form an active pump end and a common engagement member is engaged between the two pumps to synchronously drive the two pumps; Fig. 8-1 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, wherein four pumps are assembled in an array to form an active pump end and a common engagement member is positioned at the center of the array and engaged with the four pumps to synchronously drive the four pumps; Fig. 8-2 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, wherein four pumps are assembled in an array to form an active pump end and a common engagement member is positioned around the array and engaged with the four pumps to synchronously drive the four pumps; Fig. 8-3 is a sectional assembled view of the first preferred embodiment of the present invention according to Fig. 2, wherein four pumps are assembled to form a linearly arranged active pump end; Fig. 8-4 is a sectional assembled view of the first preferred embodiment of the present invention, wherein after the forms of a shaft end and the fluid suction port member and the fluid discharge port member are changed, four pumps are serially assembled to form a stringed active pump end; Fig. 9 is a perspective exploded view of a second preferred embodiment of the present invention; Fig. 10 is a perspective partially assembled view of the second preferred embodiment of the present invention according to Fig. 9; Fig. 11 is an axially sectional assembled view of the second preferred embodiment of the present invention according to Fig. 9; Fig. 12 is a radially sectional assembled view of the second preferred embodiment of the present invention according to Fig. 11, which is taken along line A-A; and Fig. 13 is a sectional assembled view of the second preferred embodiment of the present invention according to Fig. 10, wherein an active pump is assembled with a passive pump. Reference numbers of drawings :

[0031] 1pump 10vane rotor 101active pump 102passive pump 11cam ring 12eccentric amount adjustment member 2vane chamber body 204fixed wall face 21fixed wall member 211fixed wall seat sleeve 212fixed wall end face 213fixed wall hole 22movable wall member 221movable wall face 222fitting hole 2221vane receiving slot 23movable vane chamber sleeve 230vane chamber 2301, 2303eccentric vane chamber section 2302vane chamber sleeve end face 3vane rotor 30impeller 301end face 31vane 311vane top edge 33first rotor shaft end 34second rotor shaft end 341first suction / discharge ports 342second suction / discharge ports 343first suction / discharge passages 344second suction / discharge passages 345shaft center 346shaft non-center 35fluid suction / discharge port member 351first suction / discharge passage 352second suction / discharge passage 36transmission member 37sealing block 4first support body; 40second support body; 41base seat 410, 4100suction / discharge passage 411fixed wall end boss 4110boss end face 412shaft hole 5retainer member 6, 60, 61, 62common engagement member 8external forcing member 80same-direction displacement connection member 800synchronous displacement connection member 9, 90displacement resistant member DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] Please refer to Figs. 2 to 4. The present invention is mainly composed of a vane chamber body 2, a vane rotor 3, a first support body 4 and a second support body 40. The vane chamber body 2 is at least composed of a fixed wall member 21, a movable wall member 22 and a movable vane chamber sleeve 23. A vane chamber 230 is formed in the movable vane chamber sleeve 23. The capacity space of the vane chamber 230 is defined between the fixed wall member 21, the movable wall member 22 and the movable vane chamber sleeve 23. The movable wall member 22 and the movable vane chamber sleeve 23 are synchronously displaceable in an axial direction of the vane rotor 3 relative to the fixed wall member 21 so as to change the capacity of the space of the vane chamber 230.

[0033] According to the above principle, in a first embodiment of the present invention (as shown in Figs. 2 to 5), the fixed wall member 21 has a fixed wall seat sleeve 211 and a fixed wall end face 212. The fixed wall end face 212 is disposed at one end of the fixed wall seat sleeve 211. A fixed wall hole 213 is formed at a center of the fixed wall end face 212. A base seat 41 is disposed on the support body 4. A fixed wall end boss 411 is disposed on the base seat 41. A boss end face 4110 is disposed at one end of the fixed wall end boss 411. A rotor shaft hole 412 is formed on the boss end face 4110. The fixed wall member 21 can be capped on the fixed wall end boss 411 of the base seat 41 via the fixed wall hole 213, whereby the fixed wall end boss 411 is tightly fully plugged in the fixed wall hole 213 and the boss end face 4110 and the fixed wall end face 212 together form a fixed wall face 204.

[0034] The vane rotor 3 has at least one impeller 30 and at least one vane 31 assembled with the impeller 30. The vane 31 is radially slidable and extendable / retractable. The impeller 30 has an end face 301 normal to the axis vane rotor 3. The end face 301 can tightly attach to the fixed wall face 204. The vane rotor 3 has a first rotor shaft end 33, which is passed through the fixed wall face 204 and pivotally fitted in the rotor shaft hole 412 of the base seat 41. The first rotor shaft end 33 is further passed through the first support body 4 to externally connect with a transmission member 36 for receiving power or bearing a load. The vane rotor 3 further has a second rotor shaft end 34, in which a first suction / discharge port 341 and a second suction / discharge port 342 are formed. A first suction / discharge passage 343 and a second suction / discharge passage 344 are formed in the vane rotor 3 respectively in communication with the first and second suction / discharge ports 341, 342. The first and second suction / discharge passages 343, 344 respectively extend to further communicate with a suction side and a discharge side on two sides of the vane 31 to form suction / discharge passage openings in communication with the vane chamber 230. The second rotor shaft end 34 can be directly pivotally disposed on the second support body 40. Alternatively, as shown in Figs. 2 to 5, a fluid suction / discharge port member 35 can be first fitted on the second rotor shaft end 34 and then the fluid suction / discharge port member 35 is disposed on the second support body 40. The fluid suction / discharge port member 35 has a first suction / discharge passage 351 and a second suction / discharge passage 352. The second rotor shaft end 34 is pivotally fitted in the fluid suction / discharge port member 35 and rotated relative to the fluid suction / discharge port member 35. Therefore, with the fluid suction / discharge port member 35 serving as a fluid connection interface (as shown in Figs. 4 and 5), the first and second suction / discharge ports 341, 342 of the second rotor shaft end 34 can correspondingly communicate with the first and second suction / discharge passages 351, 352 of the fluid suction / discharge port member 35, whereby the first and second suction / discharge ports 341, 342 and the internal fluid passages of the second rotor shaft end 34 can be converted from an original rotating state into a stationary state. The first and second suction / discharge passages 343, 344 in the vane rotor 3 can have various forms in addition to the above form. For example, as shown in Fig. 6, the first and second suction / discharge passages 343, 344 can communicate with outer side via the first and second rotor shaft ends 33, 34 of the vane rotor 3. Alternatively, in the second embodiment of the present invention shown in Fig. 11, the first and second suction / discharge passages 343, 344 can respectively communicate with a shaft center 345 and shaft non-center 346 of the second rotor shaft end 34 and then connect with the outer side directly via a suction / discharge passage 410 and a suction / discharge passage 4100 disposed on the base seat 41 and / or the first support body 4.

[0035] An end face of the movable wall member 22 has a movable wall face 221. A fitting hole 222 is formed at a center of the movable wall face 221, which passes through the movable wall member 22. An end face of the movable vane chamber sleeve 23 has a vane chamber sleeve end face 2302 in the vane chamber 230 of the movable vane chamber sleeve 23. The vane chamber 230 of the movable vane chamber sleeve 23 can be fitted on the fixed wall seat sleeve 211 of the fixed wall member 21, whereby the movable vane chamber sleeve 23 can slide along the outer circumferences of the fixed wall seat sleeve 211 and the impeller 30 of the vane rotor 3. The fitted hole 222 of the movable wall member 22 is fitted on the impeller 30 of the vane rotor 3. In addition, an inner wall of the fitting hole 222 is formed with a vane receiving slot 2221 corresponding to the position where the vane 31 is assembled on the impeller 30, whereby the vane 31 can extend and slide into the vane receiving slot 2221. On the impeller 30, the movable wall face 221 of the movable wall member 22 is tightly attached to the vane chamber sleeve end face 2302 of the movable vane chamber sleeve 23, whereby the movable wall member 22 and the movable vane chamber sleeve 23 can synchronously move in the axial direction of the vane rotor 3 so as to change the capacity space of the vane chamber 230. When the movable wall member 22 relatively axially gets close to the fixed wall member 21, more part of the vane 31 can slide into the vane receiving slot 2221 to reduce the capacity space of the vane chamber 230. Reversely, when the movable wall member 22 relatively axially moves away from the fixed wall member 21, less part of the vane 31 slide into the vane receiving slot 2221 to enlarge the capacity space of the vane chamber 230. The interior of the vane chamber 230 is defined between the movable vane chamber sleeve 23, the fixed wall face204, the movable wall face 221 and the vane rotor 3. The impeller 30 occupies a part of the vane chamber 230. The remaining space of the vane chamber 230 forms at least one eccentric vane chamber section 2301 eccentric to the axis of the vane rotor 3. The vane 31 has a vane top edge 311 distal from the vane rotor 3. The vane top edge 311 tightly attaches to the inner wall of the vane chamber 230 and is axially and / or circumferentially slidable relative to the inner wall of the vane chamber 230. In addition, proper sealing and leakproof members can be disposed between the contacting sections of the vane 31 and the inner wall of the vane chamber 230 and between the tightly attaching or relatively displacing sections of the fixed wall member 21, the movable wall member 22, the movable vane chamber sleeve 23 and the vane rotor 3 so as to prevent the fluid in the operating vane chamber 230 from leaking through the aforesaid sections. Especially, at the inter-contacting sections of the vane top edge 311 of the vane 31, the movable wall member 22 and the movable vane chamber sleeve 23, the curve of the configuration of the vane top edge 311, the cross-sectional curve of the vane receiving slot 2221 of the movable wall member 22, into which the vane top edge 311 can slide and the curve of the inner wall of the vane chamber 230 of the movable vane chamber sleeve 23 in contact with the vane top edge 311 are different from each other. Therefore, minor gaps exist between the inter-contacting sections of the vane top edge 311 of the vane 31, the movable wall member 22 and the movable vane chamber sleeve 23. As a result, in operation, the vane chamber 230 cannot be fully closed. In order to solve this problem, a sealing block 37 is disposed on the vane top edge 311, which can tightly attach to the vane top edge 311 to synchronously slide with the vane 31. The sealing block 37 is further restricted in the intersection path of the vane receiving slot 2221 of the movable wall member 22 and the outer edge of the inner wall of the vane chamber 230 of the movable vane chamber sleeve 23. Accordingly, in operation, the sealing block 37 always seals the inter-contacting sections of the vane top edge 311, the vane receiving slot 2221 and the outer edge of the inner wall of the vane chamber 230 and blocks the gaps to achieve good sealing and leakproof effect. A retainer member 5 can be assembled between the movable wall member 22 and the movable vane chamber sleeve 23 so as to keep the movable wall member 22 and the movable vane chamber sleeve 23 attach to and assemble with each other, whereby the movable wall member 22 and the movable vane chamber sleeve 23 can synchronously axially slide. (The retainer member 5 can have various structural forms and will not be redundantly described hereinafter).

[0036] According to the above assembly structure, in operation, when the vane rotor 3 drives the vane 31 to sweep within the eccentric vane chamber section 2301, the fluid on the forward side of the sweeping direction of the vane 31 is compressed and discharged as a discharge side. After swept, a vacuum sucking force is produced on the other side of the vane 31 to suck in the fluid to form a suction side. The movable wall member 22 is fitted on the impeller 30 of the vane rotor 3 and the movable vane chamber sleeve 23 is fitted on the fixed wall seat sleeve 211. The movable wall member 22 and the movable vane chamber sleeve 23 can synchronously displace in the axial direction of the vane rotor 3. When the movable wall face 221 gradually axially gets close to the fixed wall face 204, the available suction / discharge capacity of the eccentric vane chamber section 2301 is relatively gradually reduced. Reversely, when the movable wall face 221 gradually axially moves away from the fixed wall face 204, the available suction / discharge capacity of the eccentric vane chamber section 2301 is gradually increased. Accordingly, a pump with variable suction / discharge amount, which is axially extendable / retractable to change the suction / discharge amount of the vane chamber 230, is formed.

[0037] Accordingly, the above pump with variable suction / discharge amount can be applied to and assembled in a fluid closed loop. An external force (forcing member 8 as shown in Fig. 5) forcedly pushes the pump to transfer the fluid. In the transfer process of the fluid, the pressure in the vane chamber 230 is changed. The pushing force acts on at least one of the movable wall member 22 and the movable vane chamber sleeve 23, whereby the movable wall member 22 and the movable vane chamber sleeve 23 displace toward or away from the fixed wall member 21 so as to change the capacity of the space of the vane chamber 230. Accordingly, the output amount and input amount of the fluid pushed by the rotating vane rotor 3 to pass the vane chamber 230 per unit time are variable with the change of the capacity of the vane chamber 230, whereby the vane rotor 3 can provide power transmission at different rotational speeds according to the change of the capacity of the vane chamber 230, to form a transmission drive device with variable suction / discharge amount.

[0038] As shown in Fig. 7, two pumps with variable suction / discharge amount of the present invention are oppositely arranged in communication with each other. The suction port and discharge port of the first suction / discharge passage 351 and second suction / discharge passage 352 of the two oppositely arranged pumps are in communication with each other. Accordingly, in case the pump of the two oppositely arranged pumps on the left side of the drawing is set an active pump 101, while the pump on the right side is set a passive pump 102 and the discharge passage of the active pump 101 is in communication with the suction passage of the passive pump 102, the fluid on the discharges side of the vane 31 of the active pump 101 is discharged from the discharge passage of the active pump 101 to enter the suction passage and the suction side of the vane 31 of the passive pump 102. Reversely, in case the discharge passage of the passive pump 102 is in communication with the suction passage of the active pump 101, the fluid on the discharge side of the vane 31 of the passive pump 102 is discharged from the discharge passage and then flows back to the suction passage and the suction side of the vane 31 of the active pump 101, whereby the vane chambers and the entire suction and discharge passages of the active pump 101 and the passive pump 102 form a close loop for the active pump 101 to drive the passive pump 102. In addition, a same-direction displacement connection member 80 is connected between at least one of the movable wall member 22 and the movable vane chamber sleeve 23 of the active pump 101 and the passive pump 102, whereby the movable wall member 22 and the movable vane chamber sleeve 23 of the active pump 101 and the passive pump 102 can move together in the same axial direction. In operation of the active / passive closed loop, in case the employed fluid is a liquid phase fluid and the total volume of the liquid is constant, then the liquid phase fluid on the discharge side in the eccentric vane chamber section 2301 of the active pump 101 will be pushed by the vane 31 of the rotating vane rotor 3 to the suction side of the passive pump 102. Relatively, the liquid phase fluid on the discharge side in the eccentric vane chamber section 2301 of the passive pump 102 will be pushed by the vane 31 of the rotating vane rotor 3 to the suction side of the active pump 101. Accordingly, a complete liquid phase fluid driving loop of the active pump and the passive pump is formed.

[0039] In operation of the driving loop, the driving force of the active pump 101 rotates the vane rotor 3 to drive the vane 31 to apply a push pressure to the movable vane chamber sleeve 23, the fixed wall face 204 and the movable wall face 221 positioned on the discharge side of the vane 31 in the eccentric vane chamber section 2301 of the active pump 101 and the vane face of the vane 31, the movable vane chamber sleeve 23, the fixed wall face 204 and the movable wall face 221 positioned on the suction side of the vane 31 in the eccentric vane chamber section 2301 of the passive pump 102. At the same time, after the vane 31 of the active pump 101 pushes and sweeps the eccentric vane chamber section 2301, a vacuum sucking force is produced. Therefore, a drawing sucking force is applied to the movable vane chamber sleeve 23, the fixed wall face 204 and the movable wall face 221 positioned on the suction side of the vane 31 in the eccentric vane chamber section 2301 of the active pump 101 and the vane face of the vane 31, the movable vane chamber sleeve 23, the fixed wall face 204 and the movable wall face 221 positioned on the discharge side of the vane 31 in the eccentric vane chamber section 2301 of the passive pump 102. The direction of the push pressure or vacuum sucking force applied to the movable vane chamber sleeve 23 is right normal to the axial moving direction of the movable vane chamber sleeve 23 so that the push pressure or vacuum sucking force cannot directly make the movable vane chamber sleeve 23 displace. The fixed wall face 204 is fixed and unmovable. Therefore, during the driving process, only the movable wall face 221 will bear the push pressure or the drawing vacuum sucking force to make the movable wall member 22 axially move. Also, the movable vane chamber sleeve 23 with the movable wall member 22 is driven to synchronously axially move toward or away from the fixed wall face 204. At this time, the suction side of the vane 31 in the passive pump 102 is pushed by the push pressure, while the discharge side is drawn by the vacuum sucking force. Therefore, under the action of double application forces in the same direction, the vane 31 is driven to drive and rotate the vane rotor 3 so as to output power to the load end of the passive pump 102.

[0040] At the beginning of the driving process, the passive pump 102 is situated in a stationary state. The vane rotor 3 of the active pump 101 starts to be rotated under the driving force, whereby the liquid phase fluid on the discharge side of the vane 31 starts to be pushed and compressed. At this time, in case the area of the movable wall face 221 on the discharge side of the vane 31 in the eccentric vane chamber section 2301 of the active pump 101 is larger than the area of the movable wall face 221 on the suction side of the vane 31 in the eccentric vane chamber section 2301 of the passive pump 102, due to that the larger the forced area is, the greater the push pressure applied to the forced area is and due to that the vane 31 of the passive pump 102 is supported by the load resistance at this time, the pressure pushes the movable wall face 221 of the active pump 101 with larger forced area. Accordingly, the movable wall member 22 and the movable vane chamber sleeve 23 of the active pump 101 gradually displace away from the fixed wall face 204 in the axial direction of the vane rotor 3 to enlarge the axial space of the eccentric vane chamber section 2301. At the same time, a sucking force is applied to the suction side of the vane 31 of the passive pump 102, whereby the movable wall member 22 and the movable vane chamber sleeve 23 of the passive pump 102 are sucked to axially displace in a direction toward the fixed wall face 204. At this time, the area of the movable wall face 221 on the suction side of the vane 31 in the eccentric vane chamber section 2301 of the active pump 101 is smaller than the area of the movable wall face 221 on the discharge side of the vane 31 in the eccentric vane chamber section 2301 of the passive pump 102. Therefore, after the vane 31 of the active pump 101 sweeps, the vacuum sucking force applied to the suction side of the vane 31 provides greater sucking driving force for the movable wall face 221 in the passive pump 102 with larger area. As a result, the movable wall member 22 and the movable vane chamber sleeve 23 of the active pump 101 will displace in a direction away from the fixed wall face 204. The movable wall member 22 and the movable vane chamber sleeve 23 of the passive pump 102 will displace in a direction toward the fixed wall face 204. Similarly, when the sizes of the areas of the movable wall faces 221 on the discharge side and the suction side of the vane 31 are compared with each other to be on the contrary to the above, the movable wall member 22 and the movable vane chamber sleeve 23 of the active pump 101 and the passive pump 102 will displace in a direction reverse to the above direction. During the operation process of the closed loop, the movable wall member 22 and the movable vane chamber sleeve 23 will continuously reciprocally displace in the aforesaid axial direction of the vane rotor 3 until the liquid phase fluid originally on the suction side of the vane 31 of the active pump 101 and the liquid phase fluid originally in the passage of the discharge side of the vane 31 of the passive pump 102 are driven and circulated and switched to be respectively on the discharge side of the vane 31 of the active pump 101 and in the passage of the suction side of the vane 31 of the passive pump 102. In addition, after switched, in case the volume of the liquid phase fluid in the passage has become larger than the sum of the allowable modulated maximal capacity on the discharge side of the vane 31 of the active pump 101 and the suction side of the vane 31 of the passive pump 102 by means of the displacement due to that the same-direction displacement connection member 80 is connected between the active pump 101 and the passive pump 102 and the liquid is uncompressible, along with the driving of the vane 31 of the active pump 101, the vane face on the suction side of the vane 31 in the passive pump 102 will entirely bear the push force of the liquid phase fluid to gradually push and the passive pump 102 and the load end thereof. Therefore, the active / passive closed loop will gradually start to operate.

[0041] Therefore, in application of the fluid closed loop composed of the above components, the external forcing member 8 forcedly pushes at least one of the movable wall member 22 and the movable vane chamber sleeve 23. Alternatively, by means of the push pressure and the drawing effect of the vacuum sucking force produced in the respective vane chambers 230 of the active pump 101 and the passive pump 102,the movable wall member 22 and the movable vane chamber sleeve 23 displace toward or away from the fixed wall member 21 so as to change the capacity of the vane chamber 230. Accordingly, the respective capacities of the vane chambers of the active pump 101 and the passive pump 102 are in inverse proportion to the rotational speeds of the vane rotors 3 thereof. In addition, the increase / decrease changes of the capacities of the vane chambers of the active pump 101 and the passive pump 102 are complementary to each other so that the rotational speeds of the vane rotors 3 of the active pump 101 and the passive pump 102 are in inverse proportion to each other.

[0042] During the operation process of the active / passive pump loop, the movable wall members 22 and the movable vane chamber sleeves 23 of the active pump 101 and the passive pump 102 will continuously reciprocally displace in the axial direction of the vane rotor 3. Therefore, the rotation of the passive pump 102 will be undulated. Moreover, in the above embodiment, each of the active pump 101 and the passive pump 102 has one single eccentric vane chamber section 2301 and one single vane 31. In case at the beginning of actuation of the passive pump 102, the vane 31 of the passive pump 102 is situated in a state that the vane 31 is right fully inlaid in the vane rotor 3, there is no vane face of the vane 31 in the passive pump 102 to bear the driving force. Under such circumstance, the active pump 101 is situated in an invalid idling state and cannot apply any driving force to the passive pump 102. As a result, the entire loop will idle. In order to avoid the above condition of undulated operation or idling of the loop, as shown in Fig. 7-1, two active pumps 101 composed of pumps with variable suction / discharge amount (or an active pump 101 with two eccentric vane chamber sections 2301) can be coupled with two passive pumps 102 composed of pumps with variable suction / discharge amount (or a passive pump 102 with two eccentric vane chamber sections 2301). Alternatively, as shown in Fig. 7-2, four active pumps 101 composed of pumps with variable suction / discharge amount (or an active pump 101 with four eccentric vane chamber sections 2301) can be coupled with four passive pumps 102 composed of pumps with variable suction / discharge amount (or a passive pump 102 with four eccentric vane chamber sections 2301). Therefore, multiple pumps with variable suction / discharge amount can be assembled to form an active pump 101 or multiple pumps with variable suction / discharge amount can be assembled to form a passive pump 102. The sum of the areas of the movable wall faces 221 on the suction sides of all the eccentric vane chamber sections in each active pump 101 is extremely approximate to or equal to the sum of the areas of the movable wall faces 221 of the discharge sides in all the eccentric vane chamber sections in each passive pump 102. Accordingly, at any moment of the operation process of the active pump 101 and the passive pump 102, the sum of the capacities of the suction sides always keeps extremely approximate to or equal to the sum of the capacities of the discharge sides. Therefore, the above condition of undulated operation can be effectively improved. Also, the vane 31 in each pump with variable suction / discharge amount has another symmetrical vane 31, which is 180-degree different from the vane 31 and complementary to the vane 31. Therefore, in operation, there is always at least one vane 31 extending out of the vane rotor 3 so that after assembled, in operation of transmission drive device of the active pump 101 and the passive pump 102, there is always a vane face of the vane 31 for bearing the power without invalidate idling phenomenon of the loop. Therefore, a smoother and more stable transmission driving effect is achieved.

[0043] The above the active pump 101 and the passive pump 102 are composed of multiple pumps. The active pump and the passive pump are assembled to form the active / passive drive loop. Especially, Fig. 7-2 shows an active / passive loop form composed of four active pumps 101 and four passive pumps 102 coupled and assembled therewith. In practical arrangement, the sum of the areas of the movable wall faces 221 corresponding to the suction sides in all the eccentric vane chamber sections 2301 is nearly equal to the sum of the areas of the movable wall faces 221 corresponding to the discharge sides in all the eccentric vane chamber sections 2301. This is equivalent to that the discharge amount of the liquid phase fluid in the assembly of the four active pumps 101 and the four passive pumps 102 is nearly equal to the suction amount of the liquid phase fluid in the assembly of the four active pumps 101 and the four passive pumps 102. Accordingly, the entire loop can continuously stably operate. In the case that the driving force of the active pumps 101 is unchanged, while the load of the passive pumps 102 is increased, the sweeping speed of the vanes 31 of the passive pumps 102 will be reduced. Under such circumstance, the liquid phase fluid will accumulate on the suction sides of the vanes 31 of the passive pumps 102 to apply a capacity-enlarging push force to the movable wall faces 221. In addition, the amount of the liquid phase fluid flowing from the discharge sides of the vanes 31 of the passive pumps 102 back to the suction sides of the vanes 31 of the active pumps 101 is reduced to apply a vacuum sucking force to the movable wall faces 221 of the active pump 101. The sum of the areas of the movable wall faces 221 on the discharge side of the vane 31 in the eccentric vane chamber sections 2301 is nearly equal to the sum of the areas of the movable wall faces 221 on the suction side of the vane 31 in the eccentric vane chamber sections 2301 so that the total force applied to the movable wall faces 221 of the active pumps 101 is nearly equal to the total force applied to the movable wall faces 221 of the passive pumps 102. Under the action of the capacity-enlarging push force of the passive pumps 102 and the vacuum sucking force of the active pumps 101, the movable wall members 22 and the movable vane chamber sleeves 23 of the active pumps 101 displace in a direction toward the fixed wall faces 204 to minify the total capacity of the active pumps 101. At the same time, the movable wall members 22 and the movable vane chamber sleeves 23 of the passive pumps 102 displace in a direction away from the fixed wall faces 204 to enlarge the total capacity of the passive pumps 102. Therefore, the active pumps 101 must circularly input the power many times so as to drive the passive pumps 102 to circularly output the power one time. This is similar to a downshift driving effect in power transmission. Reversely, in the case that the driving force of the active pumps 101 is unchanged, while the load of the passive pumps 102 is reduced, all the above operation conditions are totally reversed. That is, the active pumps 101 only need to circularly input the power one time for driving the passive pumps 102 to circularly output the power many times. This is similar to an upshift driving effect in power transmission. It can be known from the aforesaid that in the operation of the closed driving loop composed of the active pumps 101 and the passive pumps 102, when the driving force and the load resistance change, the respective total capacities of the active 101 and the passive pumps 102 can be automatically adjusted so that the driving force and the load resistance can be automatically balanced with each other to form a drive device, which can automatically modulate the transmission.

[0044] As shown in Figs. 7, 7-1, 7-2, 7-3 and 7-4, in the condition that the suction / discharge amount per unit time of the active pump 101 and the suction / discharge amount per unit time of the passive pump 102 are nearly equal to each other, a same-direction displacement connection member 80 or a synchronous displacement connection member 800 is drivingly connected between the movable wall member 22 or the movable vane chamber sleeve 23 of the active pump 101 and the passive pump 102. An external force is applied to the same-direction displacement connection member 80 or the synchronous displacement connection member 800 to push the same so as to force the movable wall member 22 or the movable vane chamber sleeve 23 of the active pump 101 and the passive pump 102 to respectively same-direction or synchronously reversely displace away from or toward the corresponding fixed wall faces 204. Accordingly, it can be ensured that the increase amount or the decrease amount of the capacity of the vane chamber of the active pump 101 is nearly equal to or right equal to the decrease amount or the increase amount of the capacity of the vane chamber of the passive pump 102. In addition, a displacement resistant member 9 and / or a displacement resistant member 90 (such as a spring) can be additionally arranged in the increasing direction of the capacity of the vane chamber of the active pump 101 of Fig. 7-3 and the decreasing direction of the capacity of the vane chamber of the passive pump 102 of Fig. 7-4. Accordingly, the displacement resistant member 9 and the displacement resistant member 90 can provide an internal preload resistance against the rotational speed ratio automatic regulation effect achieved between the active pumps 101 and the passive pumps 102. Under such circumstance, the actually required input driving force needs to be slightly greater than the actually externally added load resistance. This preset balancing condition provides a forced downshift effect as a transmission mechanism.

[0045] Fig. 8 shows an integrated structure of a drive device composed of two pumps connected with each other as an assembly unit. A common engagement member 6 is engaged between the two pumps to synchronously drive the two pumps. Fig. 8-1 shows an integrated structure of a drive device composed of four pumps as an assembly unit. A common engagement member 60 is engaged between the four pumps to synchronously drive the four pumps. According to the phase difference between the positions of the vanes 31 of the respective pumps in the drawings, it can be found that the suction / discharge timing between the respective pumps are just complementary to the increase / decrease of the suction amount and the discharge amount. Therefore, the suction amount and the discharge amount are equal to each other at every time point and the operation is stabilized. In operation, this avoids the undulated unstable phenomenon during the driving process due to the difference between the fluid suction amount and the fluid discharge amount. In addition, Fig. 8-2 shows a drive device composed of four pumps arranged in an array as an assembly unit according to Fig. 8-1. Fig. 8-2 is simply different from Fig. 8-1 in that a common engagement member 61 is positioned around the respective pumps and engaged with the pumps to drive the pumps. This achieves a similar synchronously driving effect. Moreover, Fig. 8-3 shows a linearly arranged driving mode. A common engagement member 62 is engaged between each two adjacent pumps to linearly connect the respective pumps. Fig. 8-4 shows a stringed driving mode. The respective pumps are coaxially or nearly coaxially serially connected.

[0046] Please further refer to Figs. 9 to 12, which show a second embodiment of the present invention. The second embodiment also mainly includes a fixed wall member 21, a movable wall member 22 and a movable vane chamber sleeve 23 defining a vane chamber 230 having variable capacity with multiple eccentric vane chamber sections 2303. A vane rotor 3 with multiple vanes 31 is arranged in the vane chamber 230. The number and configuration of the vanes 31 correspond to the number and configuration of the eccentric vane chamber sections 2303. Accordingly, a pump with variable suction / discharge amount, which can provide many times of suction / discharge operations in one single operation cycle is achieved. In principle, the number of the vanes 31 should be less than or equal to the number of the eccentric vane chamber sections 2303 so as to prevent the suction passage opening and the discharge passage opening with sucking effect and discharge effect between each two vanes 31 appear in the same eccentric vane chamber section 2303 at the same time to lead to communication between the suction passage opening and the discharge passage opening and deteriorate the driving performance of the pump.

[0047] The second embodiment is obviously different from the first embodiment in that : (1) The second embodiment is composed of five eccentric vane chamber sections 2303 and four vanes 31 and a 90-degree phase interval exists between each two of the four vanes 31. Due to the design of the track of the inner wall of the five eccentric vane chamber sections 2302, when the vane rotor 3 rotates to any angle, the vane faces of at least three vanes 3 extend out of the impeller 30 to be passive by the fluid. Therefore, the second embodiment is free from the problem of the first embodiment that when the single vane 31 is retracted into the vane rotor 3, there is no vane 31 to be passive by the fluid. (2) In the second embodiment, the four vanes 31 are arranged at 90-degree phase intervals. This is equivalent to that there are two sets of vanes 31 and each set has two vanes 31. The two vanes 31 of each set have 180-degree phase difference and are complementary to each other. In cooperation with the design of the track of the inner wall of the five eccentric vane chamber sections 2302, the sum of the areas of the movable wall faces 221 on the discharge sides of the vanes 31 in the eccentric vane chamber sections 2301 is equal to the sum of the areas of the movable wall faces 221 on the suction sides of the vanes 31 in the eccentric vane chamber sections 2301. Accordingly, the vane rotor 3 can operate in a balanced state without the condition of undulated rotation. (3) In the second embodiment, the movable vane chamber sleeve 23 can only axially displace relative to the vane rotor 3, while failing to rotate with the vane rotor 3 as in the first embodiment. (4) Fig. 13 shows an active pump 101 with variable suction / discharge amount with four vanes 31 and five eccentric vane chamber sections 2303 and a passive pump 102 with variable suction / discharge amount with four vanes 31 and five eccentric vane chamber sections 2303. The assembly of the active pump 101 and the passive pump 102 can provide a driving force as the assembly of the multiple active pumps and the multiple passive pumps each having one single vane and one single eccentric vane chamber section as shown in Figs. 7-2. Therefore, the second embodiment can provide stable driving effect and obviously has very high utility and value in industries.

[0048] According to the above design of the pump with variable suction / discharge amount of the present invention, in the condition that the original radial size is not increased, the pump with variable suction / discharge amount can truly effectively achieve the modulation function for the suction / discharge amount. The pump with variable suction / discharge amount of the present invention not only can effectively improve the shortcomings of the conventional pumps with variable suction / discharge amount, but also can be assembled to form a drive device capable of automatically modulating the rotational speed ratio between the pumps. The pump with variable suction / discharge amount of the present invention is indeed inventive and has high practical value.

[0049] The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the scope of the invention as defined in the appended claims.

Claims

1. A pump with variable suction / discharge amount, which includes a vane chamber body (2) and a vane rotor (3), the vane chamber body (2) having a vane chamber (230), characterized in that the vane chamber (230) is defined between a fixed wall member (21), a movable wall member (22) and a movable vane chamber sleeve (23) in the vane chamber body (2) and having a capacity space, the vane chamber (230) being partitioned by an impeller (30) of the vane rotor (3) in the vane chamber (230) to form at least one eccentric vane chamber sections (2301,2303), at least one vane (31) being disposed on the impeller (30), the number of the eccentric vane chamber sections (2301, 2302) being more than or equal to the number of the vanes (31), one side of the vanes (31) in the eccentric vane chamber sections (2301, 2302) being a suction side, while one side of the vanes (31) in the eccentric vane chamber sections (2301, 2302) being a discharge side, the suction side and the discharge side respectively having suction / discharge passages in communication with outer side of the pump, the fixed wall member (21) being positioned in a fixed position in the vane chamber body (2), the movable wall member (22) and the movable vane chamber sleeve (23) being displaceable in an axial direction of the vane rotor (3) relative to the fixed wall member (21) to increase / decrease and change the capacity space of the vane chamber (230), so as to form a pump with variable suction / discharge amount.

2. The pump with variable suction / discharge amount as claimed in claim 1, characterized in that the fixed wall member (21) has a fixed wall end face (212), the fixed wall end face (212) being disposed at one end of the fixed wall member (21), the fixed wall member (21) being capped on a base seat (41) of a support body (4), a rotor shaft end (33) of the vane rotor (3) passing through the fixed wall member (21), at least one of the rotor shaft ends (33,34) being pivotally supported on a support body (4), at least one of the rotor shaft ends (33,34) outward outputting power or bearing power, the fixed wall end face (212) being tightly attachable to an end face of the impeller (30) of the vane rotor (3), the movable vane chamber sleeve (23) being fitted on the fixed wall member (21) around the vane rotor (3), the movable wall member (22) being formed with vane receiving slots (2221), the number of the vane receiving slots (2221) being equal to the number of the vanes (31), a fitting hole (222) being formed at a center of the movable wall member (22), the fitting hole (222) of the movable wall member (22) being fitted on the impeller (30) of the vane rotor (3), whereby the vanes (31) on the impeller (30) can slide within the vane receiving slots (2221) of the movable wall member (22), the movable wall member (22) and the movable vane chamber sleeve (23) keeping tightly attaching to each other, whereby the movable wall member (22) and the movable vane chamber sleeve (23) can synchronously move in the axial direction of the vane rotor (3) to change the capacity of the vane chamber (230).

3. The pump with variable suction / discharge amount as claimed in claim 1, characterized in that at least two suction / discharge passages openings are disposed on the impeller (30) of the vane rotor (3), one of the suction / discharge passage (343, 344) openings being in communication with the suction side, while the other of the suction / discharge passage (343, 344) openings being in communication with the discharge side, both the suction / discharge passage openings being in communication with the outer side of the vane chamber (230).

4. The pump with variable suction / discharge amount as claimed in claim 1, characterized in that a sealing block (37) is disposed at inter-contacting sections of the vane (31), the movable wall member (22) and the movable vane chamber sleeve (23).

5. A drive device with variable suction / discharge amount composed of the pumps with variable suction / discharge amount as claimed in claim 1, characterized in that at least one pump with variable suction / discharge amount is connected and assembled to form the drive device with variable suction / discharge amount, at any moment of the operation process of the drive device with variable suction / discharge amount, the sum of the capacities of the suction sides in all the eccentric vane chamber sections (2301, 2303) being equal to the sum of the capacities of the discharge sides in all the eccentric vane chamber sections (2301, 2303).

6. A drive device with variable suction / discharge amount composed of the pumps with variable suction / discharge amount as claimed in claim 1, characterized in that at least one pump with variable suction / discharge amount is connected and assembled to form the drive device with variable suction / discharge amount, the drive device with variable suction / discharge amount having a four-time number of vanes (31) therein, each vane in the drive device with variable suction / discharge amount having a symmetrical vane (31), the angle of which is 180-degree different from the angle of the vane (31), whereby at any moment of the operation process, when the vane (31) extends out of the impeller (30) of the vane rotor (3), the 180-degree symmetrical vane (31) is retracted into the impeller (30) of the vane rotor (3) and when the vane (31) is retracted into the impeller (30) of the vane rotor (3), the 180-degree symmetrical vane extends out of the impeller (30) of the vane rotor (3) in a complementary relationship.

7. A transmission drive device composed of the pumps with variable suction / discharge amount as claimed in claim 1, characterized in that at least one pump with variable suction / discharge amount is connected and assembled to form an active pump (101) and at least one pump with variable suction / discharge amount is connected and assembled to form a passive pump (102), the active pump (101) being further connected and assembled with the passive pump (102) to form an active / passive closed loop as a transmission drive device.

8. A transmission drive device composed of the pumps with variable suction / discharge amount as claimed in claim 2, characterized in that at least one pump with variable suction / discharge amount is connected and assembled to form an active pump (101) and at least one pumps with variable suction / discharge amount are connected and assembled to form a passive pump (102), the active pump (101) being further connected and assembled with the passive pump (102) to form an active / passive closed loop as a transmission drive device.

9. The transmission drive device as claimed in claim 7, characterized in that a displacement resistance member is additionally disposed in at least one of the enlarging direction of the space of the vane chamber (230) of the active pump (101) and the decreasing direction of the space of the vane chamber (230) of the passive pump (102).

10. A driving method employing the drive device composed of the pumps with variable suction / discharge amount as claimed in claim 5 or 6, characterized in that in a closed loop, at least one pump with variable suction / discharge amount is assembled to form a drive device with variable suction / discharge amount, a fluid being input into the drive device with variable suction / discharge amount, the input fluid pushing one side of the vane in the vane chamber (230) to drive the vane rotor (3) to rotate, at the same time, the fluid on the other side of the vane (31) in the vane chamber (230) being pushed by the vane (31) out of the vane chamber (230) to form a driving loop, whereby the movable wall member (22) and the movable vane chamber sleeve (23) in the drive device with variable suction / discharge amount synchronously displace in the axial direction of the vane rotor relative to the fixed wall member (21) so as to change the capacity space of the vane chamber (230) of the drive device with variable suction / discharge amount, each time the vane rotor (3) in the vane chamber (230) rotates by one circle, the amount of the liquid pushed out of the vane chamber (230) and the amount of the liquid sucked into the vane chamber (230) being changed, when an amount of fluid per unit time is input into the drive device with variable suction / discharge amount and the same amount of fluid per unit time is output from the drive device with variable suction / discharge amount, in case the capacity of the vane chamber (230) of the drive device is enlarged, the rotational speed of the vane rotor being slowed down, in case the capacity of the vane chamber (230) of the drive device with variable suction / discharge amount is minified, the rotational speed of the vane rotor (31) being increased, that is, the rotational speed of the vane rotor (31) of the drive device with variable suction / discharge amount being in inverse proportion to the capacity of the vane chamber (230) after changed.

11. A driving method employing the transmission drive device as claimed in claim 7 or 8, characterized in that a pump with variable suction / discharge amount is set an active pump (101) and another pump with variable suction / discharge amount is set a passive pump (102), the active pump (101) and the passive pump (102) being assembled to form a closed driving loop, the amount of the fluid in the closed loop being constant and unchanged, whereby when the capacity of the vane chamber (230) of the active pump (101) is enlarged, the capacity of the vane chamber (230) of the passive pump (102) is reversely minified, in the condition that a constant amount of fluid flows within the closed loop per unit time, the rotational speed of the vane rotor (31) of the active pump (101) being slowed down, while the rotational speed of the vane rotor (31) of the passive pump (102) being increased, the rotational speed of the vane rotor (31 )of the active pump (101) being in inverse proportion to the rotational speed of the vane rotor (31) of the passive pump (102), reversely, when the capacity of the vane chamber (230) of the active pump (101) is decreased, the capacity of the vane chamber (230) of the passive pump (102) being enlarged, in the condition that a constant amount of fluid flows within the closed loop per unit time, the rotational speed of the vane rotor (31) of the active pump (101) being increased, while the rotational speed of the vane rotor (31) of the passive pump (102) being slowed down, the rotational speed of the vane rotor (31) of the active pump (101) being also in inverse proportion to the rotational speed of the vane rotor (31) of the passive pump (102).

12. The driving method as claimed in claim 11, characterized in that at least one of the movable wall member (22) and the movable vane chamber sleeve (23) in the active pump (101) and the passive pump (102) is forcedly pushed by an external force to make the movable wall member (22) and the movable vane chamber sleeve (23) of the active pump (101) and the passive pump (101) synchronously displace in the axial direction of the vane rotor (31), the synchronous displacement distance of the movable wall member (22) and the movable vane chamber sleeve (23) of the active pump (101) being equal to the synchronous displacement distance of the movable wall member (22) and the movable vane chamber sleeve (23) of the passive pump (102).

13. The driving method as claimed in claim 11, characterized in that due to that the amount of the fluid in the closed loop being constant and unchanged, the capacity of the vane chamber (230) of the active pump (101) and the capacity of the vane chamber (230) of the passive pump (102) are synchronously changed and increased / decreased in a complementary relationship, that is, when the movable wall member (22) and the movable vane chamber sleeve (23) of the active pump (101) synchronously displace in the axial direction of the vane rotor toward the fixed wall member to minify the capacity of the vane chamber (230), the movable wall member (22) and the movable vane chamber sleeve (23) of the passive pump (102) synchronously displace in the axial direction of the vane rotor away from the fixed wall member (21) to enlarge the capacity of the vane chamber (230), the displacement distance of the movable wall member (22) and the movable vane chamber sleeve (23) of the active pump (101) being equal to the displacement distance of the movable wall member (22) and the movable vane chamber sleeve (23) of the passive pump (102), reversely, when the movable wall member (22) and the movable vane chamber sleeve (23) of the active pump (101) synchronously displace in the axial direction of the vane rotor (31) away from the fixed wall member (21) to enlarge the capacity of the vane chamber (230), the movable wall member (22) and the movable vane chamber sleeve (23) of the passive pump (102) synchronously displacing in the axial direction of the vane rotor (3) toward the fixed wall member (21) to minify the capacity of the vane chamber (230), the displacement distance of the movable wall member (22) and the movable vane chamber sleeve (23) of the active pump (101) being equal to the displacement distance of the movable wall member (22) and the movable vane chamber sleeve (23) of the passive pump (102).

14. A driving method employing the transmission drive device as claimed in claim 7 or 8, includes steps of: (1) making the transmission drive device operate and causing a difference value between the driving force of the active pump (101) and the load resistance born by the passive pump (102); (2) under the action of the difference value between the driving force and the load resistance, the movable wall members (22) and the movable vane chamber sleeves (23) of the active pump (101) and the passive pump (102) being pushed by the push force and drawn by the vacuum sucking force produced in the vane chambers (230), whereby the movable wall members (22) and the movable vane chamber sleeves (23) of the active pump (101) and the passive pump (102) synchronously displace so that the capacities of the vane chambers (230) of the active pump (101) and the passive pump (102) are automatically modulated and changed under the action of the difference value between the driving force and the load resistance; and (3) due to the balancing effect of the force, the capacities of the vane chambers (230) of the active pump (101) and the passive pump (102) in the closed loop are eventually automatically modulated into a state that the driving force of the active pump (101) is equal to the load resistance of the passive pump (102), at this time, the capacities of the vane chambers (230) and the rotational speeds of the active pump (101) and the passive active pump (102) being also automatically adjusted to be in inverse proportion to each other in operation.