Clutch device and double-station pump

Abstract

The invention relates to a clutch device, comprising: an active clutch member configured to rotate about an axis of rotation, the axis of rotation defining an axial direction, the active clutch member being movable in the axial direction between a first position and a second position; the clutch comprises a driving clutch piece, a first driven clutch piece and a second driven clutch piece, when the driving clutch piece moves to the first position, the driving clutch piece is only meshed with the first driven clutch piece, and when the driving clutch piece moves to the second position, the driving clutch piece is only meshed with the second driven clutch piece. According to the clutch device, one arrangement and matching mode of the driving clutch piece and the driven clutch piece in the clutch device is provided, and at least the size of the clutch device in the partial direction can be reduced. The invention further relates to a double-station pump comprising the clutch device.

Description

Technical Field

[0001] The invention relates to a clutch device and a double-station pump comprising the clutch device. Background Art

[0002] Most washing machines and dishwashers are equipped with a dispensing system for dispensing detergents, which is usually equipped with a pump. Washing machines require two liquids, laundry detergent and softener, while dishwashers require two liquids, dishwashing liquid and rinse agent. Therefore, some dispensing systems are equipped with a double-station pump, which can dispense the two liquids separately to avoid adverse reactions caused by mixing the two liquids.

[0003] For cost control, a duplex pump is usually equipped with only one motor. When the motor rotates forward, it drives one pump chamber to work, and when the motor rotates reversely, it drives the other pump chamber to work. In order to achieve the same motor driving the two pump chambers separately, a clutch device needs to be set.

[0004] The existing clutch devices for duplex pumps still have aspects to be improved, for example, some clutch devices have more parts and are larger in size. In addition, some clutch devices are noisy, have low transmission efficiency, and are prone to wear and structural fatigue during operation.

[0005] Therefore, there is a need for a clutch device that can function well and can improve at least some aspects of existing clutch devices. Summary of the invention

[0006] In view of the above technical problems, the present invention proposes a clutch device and a corresponding double-station pump, which can solve many problems in the existing clutch devices.

[0007] According to a first aspect of the present invention, a clutch device is proposed, comprising: an active clutch member, which is configured to rotate around a rotation axis, the rotation axis defines an axial direction, and the active clutch member can move between a first position and a second position along the axial direction; a first driven clutch member and a second driven clutch member, wherein when the active clutch member moves to the first position, the active clutch member only engages with the first driven clutch member, and when the active clutch member moves to the second position, the active clutch member only engages with the second driven clutch member.

[0008] The clutch device of the present invention provides an arrangement and matching mode of the active clutch member and the driven clutch member in the clutch device, which can at least reduce the size of the clutch device along some directions.

[0009] According to the clutch device of the present invention, preferably, the active clutch has a transmission tooth portion, and the first driven clutch and the second driven clutch each have a tooth portion corresponding to the transmission tooth portion of the active clutch. The clutch device of the present invention is not provided with elastic parts that may undergo alternating deformation, so it can also avoid problems such as high noise, rapid wear, and easy fatigue fracture of parts, thereby improving product reliability.

[0010] According to the clutch device of the present invention, preferably, the tooth portions of the first driven clutch member and the second driven clutch member are both helical gears, and the transmission tooth portion of the active clutch member is suitable for driving the helical gears. The clutch device of the present invention has a further reduced volume, and the helical angle of the helical gear can be set to be smaller, thereby improving the transmission efficiency of the entire clutch device.

[0011] According to the clutch device of the present invention, preferably, the first driven clutch member and the second driven clutch member each further include a spur gear segment. The clutch device of the present invention further provides spur gear segments on the two driven clutch members to remove axial force in subsequent transmission, thereby improving transmission efficiency.

[0012] The clutch device according to the present invention preferably further comprises a rotating shaft, wherein the active clutch member is configured to be driven to rotate by the rotating shaft and to be movable along the axial direction relative to the rotating shaft. The clutch device of the present invention has a significantly simplified component structure related to reversing.

[0013] According to the clutch device of the present invention, preferably, the active clutch member includes a penetrating axial hole and is sleeved on the rotating shaft via the axial hole with a clearance fit, the rotating shaft has a non-circular cross-section, and the axial hole of the active clutch member has a corresponding non-circular cross-section.

[0014] According to the clutch device of the present invention, preferably, there is a third position between the first position and the second position along the axial direction, and the active clutch can be engaged with the first driven clutch and the second driven clutch at the third position. Through this arrangement, the clutch device of the present invention can directly drive the active clutch to engage and disengage between the two driven clutches by switching the rotation direction of the motor, without the need to additionally set up an active reversing mechanism for the active clutch, thereby further controlling the volume and cost of the product and improving the reliability of the product.

[0015] According to the clutch device of the present invention, preferably, the clutch device further comprises a first limit portion and a second limit portion, wherein the first limit portion is configured to prevent the active clutch from further moving away from the second position along the axial direction when the active clutch is located at the first position, and the second limit portion is configured to prevent the active clutch from further moving away from the first position along the axial direction when the active clutch is located at the second position. The clutch device of the present invention further provides the first limit portion and the second limit portion to assist the active clutch in engaging and disengaging between the two driven clutches with a mechanical structure, thereby further controlling the volume and cost of the product and improving the reliability of the product.

[0016] According to the clutch device of the present invention, preferably, the first limit portion and the second limit portion are fixedly connected to the rotating shaft. In the clutch device of the present invention, when the active clutch member reaches the first position or the second position, it abuts against the first limit portion or the second limit portion, and does not rotate relative to the limit portion, thereby avoiding surface friction between the active clutch member and the limit portion, and improving the product life.

[0017] According to the clutch device of the present invention, preferably, the clutch device further comprises a mounting base fixed relative to the rotation axis, wherein the first limiting portion and the second limiting portion are fixedly disposed on the mounting base.

[0018] According to the clutch device of the present invention, preferably, the first limit portion and the second limit portion are two walls that can rotatably support the rotating shaft. In the clutch device of the present invention, the two limit portions can rotatably support the rotating shaft, thereby limiting the movement of the active clutch component and making the rotation of the rotating shaft more stable, thereby improving the reliability of the motor operation.

[0019] According to the clutch device of the present invention, preferably, the first limiting portion and the second limiting portion are each provided with a through hole with a circular cross-section, and the rotating shaft rotates through the through hole.

[0020] According to the clutch device of the present invention, preferably, the axial distance between the first limiting portion and the second limiting portion is greater than the axial length of the active clutch member. The clutch device of the present invention has a simplified structure, thereby further reducing costs.

[0021] According to a second aspect of the present invention, a dual-station pump is provided, the dual-station pump comprising a clutch device having the aforementioned design features. The dual-station pump according to the present invention has multiple advantages brought by the aforementioned clutch device.

[0022] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention, wherein the drawings are only used to illustrate some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0024] Figure 1 A perspective view of the appearance of a double-station pump according to an embodiment of the present invention is shown.

[0025] Figure 2 A perspective view of a double-station pump according to an embodiment of the present invention is shown, wherein a first housing and a motor housing are removed to show a clutch device and related transmission components inside the double-station pump.

[0026] Figure 3 A perspective view of a double-station pump according to an embodiment of the present invention is shown, with the first housing, the second housing and the motor housing removed to show the clutch device, the related transmission components and the two pump chambers.

[0027] Figure 4 A perspective view of a second housing of a double-station pump according to an embodiment of the present invention is shown.

[0028] Figure 5 A three-dimensional view of an active clutch component of a clutch device of a double-station pump according to an embodiment of the present invention is shown.

[0029] Fig. 6A A top view of a double-position pump according to an embodiment of the present invention is shown, with a first housing of the double-position pump removed, wherein the active clutch member is in a first position.

[0030] Figure 6B A top view of a double-position pump according to an embodiment of the present invention is shown, with a first housing of the double-position pump removed, wherein the active clutch member is in a second position.

[0031] Figure 6C A top view of a double-position pump according to an embodiment of the present invention is shown, with a first housing of the double-position pump removed, wherein the active clutch member is in a third position.

[0032] Figure 7 A top view of a duplex pump according to another embodiment of the present invention is shown, with a first housing of the duplex pump removed.

[0033] Fig. 8A A motor according to another embodiment of the present invention and a rotating shaft attached to the motor, a first limiting portion and a second limiting portion fixed to the motor, and an active clutch member located between the first limiting portion and the second limiting portion are shown.

[0034] Figure 8B A motor and a rotating shaft attached to the motor, a first stopper and a second stopper fixed to the motor according to another embodiment of the present invention are shown, and structures of the first stopper and the second stopper are shown respectively.

[0035] Reference numerals list

[0036] 1 double station pump

[0037] 10 Clutch

[0038] 20 Clutch device

[0039] 100 Active clutch

[0040] 101 Shaft hole

[0041] 210 First driven clutch

[0042] 211 Helical gear of first driven clutch

[0043] 212 Spur gear section of first driven clutch member

[0044] 220 Second driven clutch

[0045] 221 Helical gear of second driven clutch

[0046] 222 Spur gear section of second driven clutch member

[0047] 300 Rotation axis

[0048] 410 First limiter

[0049] 411 Through hole of the first limiting portion

[0050] 420 Second limiter

[0051] 421 Through hole of the second limiting portion

[0052] 450 First limiter

[0053] 460 Second limiter

[0054] 500 External housing

[0055] 510 First Shell

[0056] 520 Second Shell

[0057] 521 Clutch device housing

[0058] 522 Motor housing

[0059] 523 first pump chamber accommodating portion

[0060] 524 second pump chamber accommodating portion

[0061] 525 Mounting base

[0062] 530 Motor housing

[0063] 600 Motor

[0064] 710 First transmission assembly

[0065] 720 Second transmission assembly

[0066] P1 First position

[0067] P2 Second position

[0068] P3 Third position

[0069] L1 Axis of rotation of active clutch

[0070] D1 First axial direction

[0071] D2 Second axial direction DETAILED DESCRIPTION

[0072] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0073] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" and similar words do not necessarily indicate quantity restrictions. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0074] The present invention will be described in detail below by way of describing exemplary embodiments.

[0075] Figure 1 1 is a perspective view of the appearance of the duplex pump 1 according to the present invention, which shows the outer housing 500 of the duplex pump 1. The outer housing 500 includes a first housing 510, a second housing 520 and a motor housing 530 assembled together. The first housing 510, the second housing 520 and the motor housing 530 together form an internal space for accommodating other components of the duplex pump 1.

[0076] Figure 2 is a perspective view of the duplex pump 1 , wherein the first housing 510 and the motor housing 530 are removed. Figure 3 3 is another perspective view of the duplex pump 1 , wherein the first housing 510 , the second housing 520 and the motor housing 530 are removed. Figure 4 The second housing 520 of the double-station pump 1 is shown.

[0077] refer to Figures 2 to 3 The double-station pump 1 includes a motor 600, a clutch device 10, a first transmission assembly 710, a second transmission assembly 720, a first pump chamber 750 and a second pump chamber 760. The clutch device 10 includes an active clutch 100, a first driven clutch 210 and a second driven clutch 220. The clutch device 10 and the transmission assemblies 710 and 720 are arranged between the clutch device accommodating portion 521 of the second housing 520 and the first housing 510, and the motor 600 is arranged between the motor accommodating portion 522 of the second housing 520 and the motor housing 530. On the other hand, the first pump chamber 750 and the second pump chamber 760 are respectively arranged in the first pump chamber accommodating portion 523 and the second pump chamber accommodating portion 524 of the second housing 520. The first pump chamber 750 is provided with a liquid inlet and a liquid outlet at the end opposite to the transmission assembly 710 for pumping the first fluid. The second pump chamber 760 is provided with a liquid inlet and a liquid outlet at an end opposite to the transmission assembly 720 for pumping the second fluid.

[0078] like Figure 2 and Figure 3 As shown, the motor 600 is fixedly arranged at a substantially middle position in the double-station pump 1. Figure 1 and Figure 4 The motor 600 is disposed between the motor receiving portion 522 of the second housing 520 and the motor housing 530. The motor 600 defines a rotation axis L1, which defines an axial direction including a first axial direction D1 and a second axial direction D2 that are opposite to each other.

[0079] The rotating shaft 300 extends from the motor 600 along the rotating axis L1, and is configured to be driven by the motor 600 to rotate around the rotating axis L1. According to the present invention, the motor 600 can drive the rotating shaft 300 to rotate counterclockwise and clockwise around the rotating axis L1, respectively, thereby driving the operation of the first pump chamber 750 and the second pump chamber 760, respectively, as will be described in detail below.

[0080] The active clutch 100 is disposed on the rotating shaft 300. The active clutch 100 is configured to be driven by the rotating shaft 300 to rotate and can move in the axial direction relative to the rotating shaft 300. Specifically, the rotating shaft 300 can have a non-circular cross section, and the active clutch 100 includes a through-hole 101 (see also Figure 5 ), and the shaft hole 101 has a corresponding non-circular cross section. Therefore, the active clutch 100 is sleeved on the rotating shaft 300 through the shaft hole 101 with a clearance fit, so that it is driven to rotate by the rotating shaft 300, and can be driven by an external force (for example, the force acting on it by the first driven clutch 210 and / or the second driven clutch 220) to move in the axial direction.

[0081] refer to Figure 5 , which shows the shape of the active clutch 100. The active clutch is provided with a transmission tooth portion 102, which is used to engage with the corresponding tooth portions 211, 221 of the first driven clutch 210 and the second driven clutch 220. Figure 5 As shown, the active clutch 100 has a thread on the outside, which is spirally arranged around the extension axis of the shaft hole 101. Specifically, the transmission tooth portion 102 of the active clutch 100 is shaped as a tooth portion of a worm. In other words, the external shape of the active clutch 100 is configured to form a worm, so that a worm-worm gear relationship can be formed with the first driven clutch 210 or the second driven clutch 220 during the operation of the double-station pump 1. Therefore, the clutch device 10 has a reduced volume and a higher transmission ratio.

[0082] refer to Figure 4 , which shows a first limiting portion 410 and a second limiting portion 420. The first limiting portion 410 and the second limiting portion 420 are fixedly mounted on a flat plate portion 510 of the second housing 520. The flat plate portion 510 is also called a mounting base 510, and is used to mount other components of the double-position pump 1, such as the first driven clutch 210, the second driven clutch 220, the first transmission assembly 710, the second transmission assembly 720, etc. In the axial direction, the first limiting portion 410 and the second limiting portion 420 are staggered, the first limiting portion 410 is located in the first axial direction D1 relative to the second limiting portion 420, and the second limiting portion 420 is located in the second axial direction D2 relative to the first limiting portion 410.

[0083] like Figure 4 As shown, the first limiting portion 410 and the second limiting portion 420 are two walls extending from the mounting base 510, and the first limiting portion 410 and the second limiting portion 420 each have a through hole 411, 421 with a circular cross section, and the two through holes 411, 421 are configured to be able to be passed through by the rotating shaft 300 and rotate. In other words, the first limiting portion 410 and the second limiting portion 420 can rotatably support the rotating shaft 300. Other specific shapes of the first limiting portion 410 and the second limiting portion 420 fixed to the mounting base 510 can also be provided so that they can rotatably support the rotating shaft 300. In some of the above configurations, the first limiting portion 410 and / or the second limiting portion 420 can be formed integrally with the mounting base 520, thereby simplifying the production steps.

[0084] Back to Figure 2 , which shows that the rotating shaft 300 passes through the through holes 411 and 421 of the first limiting portion 410 and the second limiting portion 420, and is supported by the first limiting portion 410 and the second limiting portion 420. The active clutch 100 is sleeved on the rotating shaft 300 and is located between the first limiting portion 410 and the second limiting portion 420. Therefore, the movement of the active clutch 100 in the axial direction is limited between the first limiting portion 410 and the second limiting portion 420.

[0085] Continue to refer Figure 2 and Figure 3 The first driven clutch 210 and the second driven clutch 220 are respectively arranged on the mounting base 525 and arranged on opposite sides of the rotation axis L1, that is, on opposite sides of the rotation axis 300. For example, the fixed axes of the first driven clutch 210 and the second driven clutch 220 extend vertically from the flat inner surface of the mounting base 525, so that the rotation axes of the first driven clutch 210 and the second driven clutch 220 are parallel to each other and perpendicular to the rotation axis L1.

[0086] In the axial direction, the first driven clutch 210 is arranged closer to the first limit portion 410, while the second driven clutch 220 is arranged closer to the second limit portion 420. In addition, the dimensions of the rotating shaft 300, the active clutch 100, the two limit portions 410, 420 and the two driven clutches 210, 220 are designed so that: when the active clutch 100 is located at the first position P1 against the first limit portion 410, the active clutch 100 is only engaged with the first driven clutch 210, and when the active clutch 100 is located at the second position P2 against the second limit portion 420, the active clutch 100 is only engaged with the second driven clutch 220. Thus, by moving the active clutch 100 to the first position P1 or the second position P2, only the first driven clutch 210 or the second driven clutch 220 can be driven respectively, thereby forming the clutch device 10 of the double-station pump 1.

[0087] It should be understood that Figures 2 to 4 In the illustrated embodiment, the axial distance between the first stopper 410 and the second stopper 420 is greater than the axial length of the active clutch 100, thereby making the structure of each component easy to manufacture. However, the clutch device 10 of the present invention is not limited to the relationship between the axial distance between the stoppers and the axial length of the active clutch 100.

[0088] Further, the dimensions of the rotating shaft 300, the active clutch 100, the two limit portions 410, 420 and the two driven clutches 210, 220 can be designed such that: there is a third position P3 between the first position P1 and the second position P2 in the axial direction, and the active clutch 100 can be simultaneously engaged with the first driven clutch 210 and the second driven clutch 220 at the third position P3. Thus, the engagement of the active clutch 100 with the first driven clutch 210 and the second driven clutch 220 can be directly switched by switching the rotation direction of the motor 600, as will be described in detail later, without providing an additional reversing device in the double-station pump 1.

[0089] like Figure 2 and Figure 3 As shown, the corresponding tooth portions 211, 221 of the first driven clutch 210 and the second driven clutch 220 for engaging with the transmission tooth portion 102 of the driving clutch 100 are both helical gears 211, 221, so as to match the worm shape of the driving clutch 100. Therefore, when the rotating shaft 300 drives the driving clutch 100 to rotate around the rotation axis L1, when the driving clutch 100 is docked with the first driven clutch 210 (or the second driven clutch 220), the relative transmission relationship between the transmission tooth portion 102 of the driving clutch 100 and the helical gear 211 of the first driven clutch 210 (or the helical gear 221 of the second driven clutch 220) is also similar to that of the worm and the worm wheel.

[0090] According to the present invention, the first driven clutch 210 and the second driven clutch 220 are configured to engage with relevant components in the first transmission assembly 710 and the second transmission assembly 720 respectively, so that the first transmission assembly 710 can drive the operation of the first pump chamber 750, and the second transmission assembly 720 can drive the operation of the second pump chamber 760.

[0091] like Figure 3As shown in more detail in FIG. 1 , the first driven clutch 210 further includes a spur gear section 212, which is fixed relative to the bevel gear 211 and is used to drive the operation of the first transmission assembly 710, such as driving the rotation of the corresponding gear in the first transmission assembly 710. The second driven clutch 220 further includes a spur gear section 222. The spur gear section 222 is fixed relative to the bevel gear 221 and is used to drive the operation of the second transmission assembly 720, such as driving the rotation of the corresponding gear in the second transmission assembly 720. By providing the spur gear sections 212 and 222, the axial force is removed in the transmission to the first transmission assembly 710 and the second transmission assembly 720, thereby improving the transmission efficiency.

[0092] In addition, according to an embodiment of the present invention not shown, the first driven clutch 210 and the second driven clutch 220 may also all be helical gear structures, and the first transmission assembly 710 and the second transmission assembly 720 are provided with corresponding helical gears. It should be noted that in both structures of the driven clutch 210 and 220, the clutch device 10 does not need to utilize the axial force of the helical gear part of the driven clutch to perform clutch control, so there is no need to increase the helical angle of the two driven clutches, thereby ensuring the gear transmission efficiency.

[0093] In the following, reference is made to FIG. 6A to FIG. 6C , explaining the working mode of the clutch device 10.

[0094] like Fig. 6A As shown, the active clutch 100 is in the first position P1 on the rotating shaft 300, that is, the active clutch 100 abuts against the first limiting portion 410 and engages with the first driven clutch 210. The motor 600 can rotate clockwise (observing the motor 600 along the second axial direction D2), or the motor 600 can rotate counterclockwise.

[0095] First, when the motor 600 rotates counterclockwise, the active clutch 100 pushes the meshing tooth surface of the helical gear 211 of the first driven clutch 210 along the second axial direction D2, so that the first driven clutch 210 rotates around its own rotation axis. Correspondingly, the meshing tooth surface of the helical gear 211 in turn applies a thrust to the active clutch 100 along the first axial direction D1, so that the active clutch 100 abuts against the first limit portion 410, that is, the active clutch 100 is maintained in the first position P1. As a result, the motor 600 continuously drives the active clutch 100 to rotate, and the active clutch 100 continuously drives the first driven clutch 210 to rotate, thereby driving the operation of the first transmission assembly 710 and the corresponding operation of the first pump chamber 750. At this time, the active clutch 100 is not meshed with the second driven clutch 220. Therefore, the second driven clutch member 220, the second transmission assembly 720 and the second pump chamber 760 are all inoperative.

[0096] exist Fig. 6A In the case of, if it is necessary to switch from the state where the first pump chamber 750 is working to the state where the second pump chamber 760 is working, it is only necessary to switch the motor 600 from counterclockwise rotation to clockwise rotation. Thus, the following process will occur.

[0097] When the motor 600 just switches to clockwise rotation, the active clutch 100 starts to rotate clockwise along with the rotating shaft 300. As a result, the active clutch 100 pushes the meshing tooth surface of the helical gear 211 of the first driven clutch 210 along the first axial direction D1. Correspondingly, the meshing tooth surface of the helical gear 211 applies thrust to the active clutch 100 along the second axial direction D2. Since the driven clutch carries a load and requires a large force to be driven, and since the active clutch 100 is configured to be able to move in the axial direction relative to the rotating shaft 300, the relative action between the helical gear 211 and the active clutch 100 will push the active clutch 100 to move along the second axial direction D2 and leave the first limit portion 410.

[0098] Next, the motor 600 continues to rotate clockwise, and the bevel gear 211 continues to push the active clutch member 100 to move along the second axial direction D2 to reach the third position P3. Figure 6C . In the third position P3, the active clutch 100 is meshed with the first driven clutch 210 and the second driven clutch 220 at the same time. At this time, the driving relationship between the active clutch 100 and the first driven clutch 210 and the second driven clutch 220 is similar. That is, the active clutch 100 pushes the meshing tooth surface of the helical gear 221 of the second driven clutch 220 along the first axial direction D1, and the meshing tooth surface of the helical gear 221 applies thrust to the active clutch 100 along the second axial direction D2. Therefore, in the third position P3, the first driven clutch 210 and the second driven clutch 220 jointly push the active clutch 110 to move along the second axial direction D2.

[0099] The active clutch 100 continues to move along the second axial direction D2, and will be out of engagement with the first driven clutch 210, and only engage with the second driven clutch 220. Thereafter, the second driven clutch 220 continues to push the active clutch 100 to move along the second axial direction D2, and finally, the active clutch 100 moves to the second position P2, and abuts against the second limit portion 420, see Figure 6B .

[0100] When the active clutch 100 reaches the second position P2 and the motor 600 continues to rotate clockwise, the active clutch 100 still pushes the meshing tooth surface of the helical gear 221 of the second driven clutch 220 along the first axial direction D1, and the meshing tooth surface of the helical gear 221 applies a thrust to the active clutch 100 along the second axial direction D2. The active clutch 100 abuts against the second limit portion 420, that is, the active clutch 100 remains in the second position P2. As a result, the clutch device 10 is completely switched to a state of only driving the second driven clutch 220, and only the second pump chamber 760 is working.

[0101] Thus, the motor 600 continuously drives the active clutch 100 to rotate clockwise, and the active clutch 100 continuously drives the second driven clutch 220 to rotate, thereby driving the operation of the second transmission assembly 720 and the corresponding operation of the second pump chamber 760. At this time, the active clutch 100 is not engaged with the first driven clutch 210. Therefore, the first driven clutch 210, the first transmission assembly 710 and the first pump chamber 750 are all inoperative.

[0102] exist Figure 6B In the case of the second pump chamber 760, if it is necessary to switch from the working state of the second pump chamber 760 to the working state of the first pump chamber 750, it is only necessary to switch the motor 600 from clockwise rotation to counterclockwise rotation. Thus, a switching process similar to the above switching process will occur.

[0103] In short, similarly, when the motor 600 starts to switch from clockwise rotation to counterclockwise rotation, the active clutch 100 also starts to rotate counterclockwise, thereby applying a thrust along the second axial direction D2 to the second driven clutch 220, and the second driven clutch 220 thus applies a thrust along the first axial direction D1 to the active clutch 100, causing the active clutch 100 to move along the first axial direction D1.

[0104] Next, the active clutch 100 moves further to the third position P3, and simultaneously engages with the first driven clutch 210 and the second driven clutch 220. Thus, the first driven clutch 210 and the second driven clutch 220 jointly push the active clutch 110 to move along the first axial direction D1. When the active clutch 110 moves further and disengages from the second driven clutch 220, the first driven clutch 210 pushes the active clutch 110 to continue moving along the first axial direction D1 until the active clutch 110 reaches the first position P1 and abuts against the first limit portion 410. Thus, the clutch device 10 is completely switched to a state of only driving the first driven clutch 210, and only the first pump chamber 750 works.

[0105] Thus, the clutch device 10 according to the present invention can switch the direction of rotation through the motor 600, so that the active clutch 100 moves axially, and thus drives the operation of the two driven clutches in an orderly manner. Since the active clutch 100 is only engaged with one driven clutch during the non-switching process, the wear of the components is also reduced. In addition, it should be noted that according to the setting of the clutch device 10, the rotating shaft 300 (and the motor shaft) is not subjected to axial thrust, which can improve the reliability of the motor operation.

[0106] in addition, Figure 7 , Fig. 8A and 8B 2 shows a preferred embodiment of the present invention. The other components of the clutch device 20 in this embodiment are the same as those in the previous embodiment, but with different forms of the limiting parts 450 and 460. Fig. 8A and Figure 8B , the first limiting portion 450 and the second limiting portion 460 are both components fixedly connected to the rotating shaft 300. The active clutch 100 is sleeved on the rotating shaft 300 and arranged between the first limiting portion 450 and the second limiting portion 460. As a result, the first limiting portion 450 prevents the active clutch 100 from further moving along the first axial direction D1, and the second limiting portion 460 prevents the active clutch 100 from further moving along the second axial direction D2. The first limiting portion 450 and the second limiting portion 460 according to this embodiment have the following advantages: when the active clutch 100 abuts against the two limiting portions 450 and 460 respectively to drive the driven clutch, there is no relative rotation between the active clutch 100 and the two limiting portions 450, thereby avoiding end face friction, thereby reducing energy consumption, reducing component wear, and increasing the service life of the product.

[0107] According to another embodiment not shown, the Figure 8B The single second limiting portion 460 is shown, but a step portion having a cross section larger than the cross section of the shaft hole 101 of the active clutch member 100 is provided at one end of the rotating shaft 300 close to the motor 600 to play a limiting role.

[0108] The exemplary implementation schemes of the clutch device and the dual-station pump proposed in the present invention are described in detail above with reference to the preferred embodiments. However, those skilled in the art will appreciate that, without departing from the concept of the present invention, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention may be combined in various ways without exceeding the scope of protection of the present invention.

Claims

1. A clutch device (10, 20), comprising: An active clutch (100), the active clutch being configured to rotate about a rotation axis (L1), the rotation axis (L1) defining an axial direction, the active clutch (100) being movable along the axial direction between a first position (P1) and a second position (P2); A first driven clutch member (210) and a second driven clutch member (220), When the active clutch (100) moves to the first position (P1), the active clutch (100) only engages with the first driven clutch (210); and when the active clutch (100) moves to the second position (P2), the active clutch (100) only engages with the second driven clutch (220).

2. The clutch device according to claim 1, wherein: The active clutch (100) has a transmission tooth portion (102), and the first driven clutch (210) and the second driven clutch (220) each have a tooth portion (211, 221) corresponding to the transmission tooth portion (102) of the active clutch.

3. The clutch device according to claim 2, wherein: The tooth portions (211, 221) of the first driven clutch component (210) and the second driven clutch component (220) are both helical gears, and the transmission tooth portion (102) of the active clutch component (100) is suitable for driving the helical gears.

4. The clutch device according to claim 3, wherein: The first driven clutch member (210) and the second driven clutch member (220) also each include a spur gear section (212, 222).

5. The clutch device according to any one of claims 1 to 4, further comprising a rotating shaft (300), wherein the active clutch member (100) is configured to be driven to rotate by the rotating shaft (300) and is capable of moving along the axial direction relative to the rotating shaft (300).

6. The clutch device according to claim 5, wherein: The active clutch component (100) comprises a through shaft hole (101) and is sleeved on the rotating shaft (300) via the shaft hole (101) with a clearance fit; the rotating shaft (300) has a non-circular cross section, and the shaft hole (101) of the active clutch component has a corresponding non-circular cross section.

7. The clutch device according to claim 6, wherein: There is a third position (P3) between the first position (P1) and the second position (P2) along the axial direction, and the active clutch (100) can be simultaneously engaged with the first driven clutch (210) and the second driven clutch (220) at the third position (P3).

8. The clutch device according to claim 7, further comprising a first limiting portion (410) and a second limiting portion (420), wherein the first limiting portion (410) is configured to prevent the active clutch component (100) from further moving along the axial direction away from the second position (P2) when the active clutch component (100) is located at the first position (P1), and the second limiting portion (420) is configured to prevent the active clutch component (100) from further moving along the axial direction away from the first position (P1) when the active clutch component (100) is located at the second position (P2).

9. The clutch device according to claim 8, wherein: The first limiting portion (410) and the second limiting portion (420) are fixedly connected to the rotating shaft (300).

10. The clutch device according to claim 8, further comprising a mounting base (525) fixed relative to the rotation axis (L1), wherein: The first limiting portion (410) and the second limiting portion (420) are fixedly arranged on the installation base (525).

11. The clutch device according to claim 10, wherein: The first limiting portion (410) and the second limiting portion (420) are two walls capable of rotatably supporting the rotating shaft (300).

12. The clutch device according to claim 11, wherein: The first limiting portion (410) and the second limiting portion (420) are each provided with a through hole (411, 421) with a circular cross section, and the rotating shaft (300) rotates by passing through the through holes (411, 421).

13. The clutch device according to claim 8, wherein: The axial distance between the first limiting portion (410) and the second limiting portion (420) is greater than the axial length of the active clutch component (100).

14. A double-station pump (1) having a clutch device according to any one of claims 1 to 13.

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