Slipping mechanism, liquid adding pump, putting system and household appliance

Abstract

The invention discloses a slipping mechanism, a liquid adding pump, a putting system and a household electrical appliance, the slipping mechanism comprises a driving gear, a clutch disc and a clutch gear, a cantilever is fixed at one end of the driving gear, and a first abutting surface is formed at one end of the cantilever; the clutch disc is provided with a clutch part, a locking part and a slipping part connected with the clutch part and the locking part; the clutch gear is provided with a combination part and an abutting part. When the driving gear rotates in the first direction, the first abutting face, the locking part and the combination part can sequentially abut against one another, at the moment, the slipping mechanism is in a locked state, and the driving gear pushes the clutch gear to rotate through the clutch disc; when the driving gear rotates in the direction opposite to the first direction, the cantilever and the slipping part are in extrusion friction to drive the clutch disc to rotate till the locking part of the clutch disc is in matched butt joint with the combining part of the clutch gear, and at the moment, the slipping mechanism is in a slipping state. The service life of the slipping mechanism can be greatly prolonged, and the noise of the slipping mechanism is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of dispenser technology, and more particularly to a slip mechanism, a liquid pump, a dispensing system, and a household appliance. Background Technology

[0002] Ratchet and cantilever mechanisms are a common type of unidirectional slippage mechanism. In existing ratchet and cantilever slippage mechanisms, the ratchet has a significant height difference. When the cantilever crosses this step, its deformation undergoes a large abrupt change, generating significant noise instantaneously. Continuous slippage produces a loud "clicking" sound. Furthermore, in existing solutions, the cantilever's shape constantly undergoes large abrupt changes during slippage, leading to cantilever yielding deformation and accelerated wear at the ratchet and cantilever's top teeth, thus reducing the lifespan of the slippage mechanism. Summary of the Invention

[0003] To address the technical problem that existing cantilever slip mechanisms, which use ratchet for unidirectional slippage, generate significant noise and accelerate wear on the ratchet and cantilever teeth during continuous slippage, thus reducing the lifespan of the slip mechanism, this invention provides a slip mechanism, a liquid pump, a dispensing system, and a household appliance to solve the aforementioned problems.

[0004] This invention proposes a slippage mechanism, including a drive gear, a clutch disc, and a clutch gear. One end of the drive gear is fixed with a cantilever, and one end of the cantilever forms a first contact surface. The clutch disc is coaxially arranged with the drive gear and has a clutch part, a locking part, and a slippage part connecting the clutch part and the locking part. The clutch gear is coaxially arranged with the drive gear and has a engagement part and a contact part.

[0005] When the drive gear rotates in the first direction, the first contact surface, the locking part, and the engagement part can abut in sequence. At this time, the slipping mechanism is in the locked state, and the drive gear drives the clutch gear to rotate through the clutch disc. When the drive gear rotates in the opposite direction of the first direction, the cantilever and the slipping part squeeze and rub against each other, causing the clutch disc to rotate until the locking part of the clutch disc engages with the engagement part of the clutch gear, so that the cantilever smoothly transitions through the locking part. At this time, the slipping mechanism is in the slipping state, and the drive gear cannot drive the clutch gear to rotate.

[0006] Furthermore, the clutch disc is fixed with a first protrusion, the clutch part and the locking part are located at the two circumferential ends of the first protrusion, the slipping part is located in the middle of the first protrusion, and the radial inner side of the slipping part is squeezed and rubbed against the cantilever.

[0007] Furthermore, one end of the clutch gear is fixed with a second protrusion that corresponds one-to-one with the first protrusion, and the engagement portion and the abutment portion are located at the two circumferential ends of the second protrusion.

[0008] Furthermore, the first and second protrusions are arranged intersectingly in the circumferential direction.

[0009] Furthermore, the circumferential end face of the locking part is a stepped end face that gradually protrudes circumferentially from the inside to the outside. When the slipping mechanism is in the locked state, the first abutting surface abuts against the end face of the locking part near the inner side, and the locking part has a limiting surface that covers the outer side of the cantilever.

[0010] Furthermore, the end face of the locking part that abuts against the first abutting surface is designated as the second abutting surface. The second abutting surface is arranged radially inclined relative to the clutch gear so that an acute angle is formed between the tangent of the second abutting surface and the limiting surface.

[0011] Furthermore, the first contact surface is arranged radially inclined relative to the drive gear with an inclination angle of α, and the second contact surface is arranged radially inclined with an inclination angle of β relative to the clutch gear, then β≤α.

[0012] Furthermore, 0 < α < 60, 0 < β < 60.

[0013] Furthermore, β = 10°, α = 15°.

[0014] Furthermore, the minimum inner diameter of the second protrusion is greater than the minimum inner diameter of the first protrusion.

[0015] Furthermore, the slip portion has a radial protrusion that radially presses against the cantilever, and the radial protrusion is disposed near the clutch portion.

[0016] Furthermore, the free end of the cantilever has an inwardly tapering transition surface on its outer side, which can pass arbitrarily from both sides of the radial protrusion.

[0017] Furthermore, the outer side of the cantilever has a ramp surface connected to the transition surface, the ramp surface gradually extending radially outward from the side away from the free end of the cantilever to the side closer to the free end of the cantilever.

[0018] Furthermore, when the connecting part and the locking part are engaged, the inner diameter of the connecting part at the mating surface of the connecting part and the locking part is smaller than the inner diameter of the locking part at that location, and larger than the minimum inner diameter of the slipping part.

[0019] Furthermore, the inner surface of the second protrusion is an inclined surface that transitions between the joint and the abutment.

[0020] Furthermore, if the radial distance between the arc surface where the limiting surface is located and the radial inner side of the first protrusion is X, then 0 < X ​​< 1 mm.

[0021] Furthermore, X = 0.7 mm.

[0022] Furthermore, the first protrusion protrudes from the surface of the clutch disc toward the drive gear.

[0023] The present invention also proposes a liquid adding pump, which includes a drive motor and one or more of the aforementioned slipping mechanisms connected to the drive motor, wherein the drive gear of the slipping mechanism meshes with the output end of the drive motor for transmission.

[0024] The present invention also proposes a dispensing system, including the liquid dispensing pump described above.

[0025] The present invention also proposes a household appliance, including the above-described dispensing system.

[0026] The beneficial effects of this invention are:

[0027] (1) The present invention enables the locking part on the clutch disc to engage with the engagement part of the clutch gear when it is in a slipping state by separately setting the drive gear, clutch disc and clutch gear, thereby eliminating the abrupt step of the locking part. When the slipping mechanism is in a slipping state, the cantilever will not produce a "click" sound due to the step when it passes over the locking part. The cantilever can slip smoothly without any abrupt deformation, thereby greatly improving the service life of the slipping mechanism and greatly reducing the noise of the slipping mechanism.

[0028] (2) The present invention provides protrusions on the clutch gear and clutch disc. The structural design of the protrusion surface satisfies the cooperation between the drive gear, clutch disc and clutch gear. The structure is simple and easy to assemble. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Figure 1 This is an exploded view of the slippage mechanism described in this invention;

[0031] Figure 2 This is a perspective view of the driving gear in this invention;

[0032] Figure 3 This is a schematic diagram of the arrangement of the cantilever in the drive gear of the present invention;

[0033] Figure 4 This is a front view of the clutch disc in this invention;

[0034] Figure 5 This is a front view of the clutch gear in this invention;

[0035] Figure 6 This is a schematic diagram of the slippage mechanism described in this invention in the locked state;

[0036] Figure 7 This is a schematic diagram of the slip mechanism described in this invention reversing from the locked state to prepare for entering the slip state;

[0037] Figure 8 This is a schematic diagram of the slipping mechanism described in this invention in a slipping state;

[0038] Figure 9 This is an enlarged view of the mating surface between the locking part and the connecting part when the present invention is in a slipping state;

[0039] Figure 10 yes Figure 4 An enlarged view of the first protrusion in the clutch disc shown;

[0040] Figure 11 This is an enlarged view of the contact surface between the cantilever and the slipping part in this invention;

[0041] Figure 12 This is a perspective view of the delivery system described in this invention.

[0042] In the figure, 1. Drive gear, 2. Clutch disc, 3. Clutch gear, 4. Cantilever, 401. First contact surface, 402. Transition surface, 403. Sloping surface, 5. First bushing, 6. First protrusion, 601. Clutch part, 602. Locking part, 603. Slipping part, 604. Limiting surface, 605. First end face, 606. Second contact surface, 607. Radial protrusion, 7. Second protrusion, 701. Joint part, 702. Contact part, 8. Protrusion A, 9. Protrusion B, 10. Second bushing, 11. Drive motor, 12. Slipping mechanism. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0044] Example 1

[0045] like Figures 1-5 As shown, a slippage mechanism 12 includes a drive gear 1, a clutch disc 2, and a clutch gear 3, which are arranged coaxially in sequence. The drive gear 1 meshes with the drive component for transmission, and the clutch gear 3 meshes with the working component for transmission. When the slippage mechanism 12 is in the locked state, the clutch disc 2 connects the drive gear 1 and the clutch gear 3, at which time the clutch gear 3 and the drive gear 1 rotate synchronously. When the slippage mechanism 12 is in the slippage state, the clutch disc 2 separates the drive gear 1 and the clutch gear 3, and the drive gear 1 rotates independently.

[0046] The driving gear 1 of this invention adopts a conventional cantilever 4 structure, that is, one axial end of the driving gear 1 is fixed with a cantilever 4, and one end of the cantilever 4 forms a first abutment surface 401, such as... Figure 2As shown, the drive gear 1 has a first bushing 5 at its center. One end of the first bushing 5 protrudes from the end face of the drive gear 1. One end of the cantilever 4 is fixed on the first bushing 5, and the other end is a free end. The first contact surface 401 is located on the end face of the free end. The design of one end being suspended allows the cantilever 4 to deform radially.

[0047] The clutch disc 2 is located between the drive gear 1 and the clutch gear 3. The clutch disc 2 has a clutch part 601, a locking part 602, and a slippage part 603 connecting the clutch part 601 and the locking part 602. The clutch gear 3 has a engagement part 701 and an abutment part 702. The locking part 602 engages with the first abutment surface 401 of the cantilever 4 or with the engagement part 701 in different states. The clutch part 601 is used to engage with the abutment part 702. The slippage part 603 is used to squeeze the cantilever 4, so that the clutch disc 2 can rotate a certain angle before engaging with the engagement part 701 before the mechanism is ready to enter the slippage state.

[0048] When the drive gear 1 rotates in the first direction, the first contact surface 401, the locking part 602 and the engagement part 701 can abut in sequence along the rotation direction. At this time, the slip mechanism 12 is in the locked state, and the drive gear 1 pushes the clutch gear 3 to rotate through the clutch disc 2. When the drive gear 1 rotates in the opposite direction of the first direction (the first direction can be either counterclockwise or clockwise), the cantilever 4 and the slip part 603 squeeze and rub against each other, causing the clutch disc 2 to rotate until the locking part 602 of the clutch disc 2 engages with the engagement part 701 of the clutch gear 3. In a free state, the first contact surface 401 of the cantilever 4 abuts against the locking part 602 at the end face. The cantilever 4 and the slip part 603 are subjected to lateral compression friction. Therefore, in the radial direction, the contact surface between the slip part 603 and the cantilever 4 is located inside the contact surface between the locking part 602 and the cantilever 4. When the clutch disc 2 and the clutch gear 3 do not produce relative movement, the cantilever 4 will produce a radial change when passing through the locking part 602 from the direction of the slip part 603, thereby generating noise and reducing the service life of the cantilever 4.

[0049] In this invention, the squeezing friction between the cantilever 4 and the slippage part 603 can drive the clutch disc 2 to rotate, thereby enabling the clutch disc 2 to rotate relative to the clutch gear 3 at a certain angle until the locking part 602 of the clutch disc 2 and the engagement part 701 of the clutch gear 3 are engaged and connected. The engagement and connection means that the two end faces are exactly engaged with each other, so that the locking part 602 and the engagement part 701 are smoothly transitioned, eliminating the end face of the locking part 602 and eliminating abrupt changes. The clutch disc 2 and the clutch gear 3 are connected end-to-end between the locking part 602 and the connecting part 701, while the drive gear 1 and the clutch disc 2 are in side friction contact between the cantilever 4 and the slipping part 603. The drive gear 1, which is in side friction, can only drive the clutch disc 2 to move independently and cannot support the operation of the clutch gear 3 or even the working parts. Therefore, after the locking part 602 of the clutch disc 2 and the connecting part 701 of the clutch gear 3 are engaged, the cantilever 4 will slip with the slipping part 603. After passing the locking part 602, it directly enters the connecting part 701 without abrupt steps. Therefore, the cantilever 4 smoothly transitions to the locking part 602. At this time, when the slipping mechanism 12 is in a slipping state, the drive gear 1 cannot drive the clutch gear 3 to rotate.

[0050] The clutch portion 601, locking portion 602, and slip portion 603 can be respectively arranged on the clutch disc 2, simply by connecting the slip portion 603 to the clutch portion 601 and locking portion 602. Alternatively, the clutch portion 601, locking portion 602, and slip portion 603 can be hollow bodies with corresponding working surfaces. For ease of processing, the present invention preferably integrally forms the clutch portion 601, locking portion 602, and slip portion 603 into the first protrusion 6, such as... Figure 1 and Figure 4 As shown, the first protrusion 6 is fixed to the clutch disc 2. The clutch part 601 and the locking part 602 are located at the two circumferential ends of the first protrusion 6, and the slip part 603 is located in the middle of the first protrusion 6. The radially inner side of the slip part 603 is squeezed and rubbed against the cantilever 4. The number of first protrusions 6 and cantilever 4 can be equal or unequal.

[0051] The engaging portion 701 and the abutting portion 702 can also be arranged separately on the clutch gear 3. The arrangement requires that the engaging portion 701 and the abutting portion 702 be arranged crosswise. After the driving gear 1, clutch disc 2, and clutch gear 3 are assembled, the two sides of each first protrusion 6 are the engaging portion 701 and the abutting portion 702, respectively. This ensures that before and after the clutch disc 2 and clutch gear 3 rotate relative to each other, the locking portion 602 of the first protrusion 6 can engage with the end face of the engaging portion 701, and the clutch portion 601 of the first protrusion 6 can engage with the end face of the abutting portion 702. Similar to the design of the first protrusion 6, the present invention preferably integrally molds the engaging portion 701 and the abutting portion 702 to form the second protrusion 7, such as... Figure 1 and Figure 5As shown, the second protrusion 7 is fixed to one end of the clutch gear 3 and corresponds one-to-one with the first protrusion 6. The engaging part 701 and the abutting part 702 are located at the two circumferential ends of the second protrusion 7. After the clutch disc 2 and the clutch gear 3 are assembled, the first protrusion 6 and the second protrusion 7 need to be arranged crosswise along the circumferential direction, and the same part on each first protrusion 6 and each second protrusion 7 should face the same direction to ensure that the engaging part 601 and the abutting part 702 are opposite to each other in the circumferential direction, and the locking part 602 and the engaging part 701 are opposite to each other. Since the end of the second protrusion 7 does not need to abut against the first abutting surface 401 of the cantilever 4, after the cantilever 4 passes through the locking part 602 and enters the engaging part 701, the deformation of the cantilever 4 can be gradually reduced through the transition of the inner side of the second protrusion 7, thereby avoiding the radial abrupt change of the cantilever 4. Preferably, the inner surface of the second protrusion 7 is an inclined surface that transitions between the joint 701 and the abutment 702. This inclined surface can be an arc-shaped surface or a combination of multiple planes, as long as the cantilever 4 can be gradually relaxed from the joint 701 to the abutment 702.

[0052] This invention adds a clutch disc 2 to the traditional slip mechanism 12, such as... Figure 1 and Figure 4 As shown, along Figure 6 When rotating counterclockwise, the cantilever 4 engages with the locking part 602 on the clutch disc 2, and the clutch part 601 of the clutch disc 2 drives the clutch gear 3 to rotate. At this time, the slip mechanism 12 is in the locked state. When rotating counterclockwise, the cantilever 4 will drive the clutch disc 2 to rotate through a certain angle. At this time, the locking part 602 of the clutch disc 2 will engage with the engagement part 701 of the clutch gear 3 (as shown in the image). Figure 8 As shown in the figure, this allows the cantilever 4 to slip smoothly. The slip mechanism 12 is in a slipping state without any sudden deformation, which greatly improves the life of the slip mechanism 12 and greatly reduces the noise of the slip mechanism 12.

[0053] For ease of description, this article refers to the rotation of the drive gear 1 when the slipping mechanism 12 is in the locked state as forward rotation, and the rotation of the drive gear 1 when the slipping mechanism 12 is in the slipping state as reverse rotation.

[0054] If there are too many first protrusions 6, the cantilever 4 will be compressed for a long time, resulting in a high friction frequency and increased wear. If there are too few first protrusions 6 and cantilever 4, the friction force may be insufficient to support the reverse rotation of the clutch disc 2. Therefore, it is preferable that three cantilever 4, three first protrusions 6 and three second protrusions 7 are arranged in an array. This not only drives the clutch disc 2 to rotate in the reverse direction by a certain angle, but also allows the cantilever 4 to remain in a free state for a long time during the slippage process, reducing the friction frequency between the cantilever 4 and the slippage part 603 and improving the reliability of the slippage mechanism 12.

[0055] like Figure 1As shown, in this embodiment, the first protrusion 6 protrudes from the surface of the clutch disc 2 toward the driving gear 1. A second bushing 10 is provided at the center of the clutch gear 3. Both the second bushing 10 and the second protrusion 7 protrude toward the clutch disc 2. The clutch disc 2 is fitted over the second bushing 10, so that the first protrusion 6 of the clutch disc 2 and the second protrusion 7 of the clutch gear 3 are located on the same plane.

[0056] Since the slip portion 603 on the first protrusion 6 needs to squeeze the cantilever 4, causing the cantilever 4 to drive the clutch disc 2 to rotate at a certain angle, the inner diameter of the slip portion 603 is relatively small. The second protrusion 7 has no direct relationship with the cantilever 4, but is only used to cooperate with the end face of the first protrusion 6. In order to minimize the friction between the cantilever 4 and the second protrusion 7 when slipping, the inner diameter of the second protrusion 7 should be increased as much as possible. Preferably, the minimum inner diameter of the second protrusion 7 is greater than the minimum inner diameter of the first protrusion 6.

[0057] Example 2

[0058] Based on Embodiment 1, the circumferential end face of the locking part 602 is a stepped end face that gradually protrudes circumferentially from the inside to the outside. When the slip mechanism 12 is in the locked state, the first abutting surface 401 abuts against the end face of the locking part 602 near the inside, and the locking part 602 has a limiting surface 604 that covers the outside of the cantilever 4. The stepped end face has at least two stepped structures. The stepped design of the end face is to provide a limiting surface 604 that covers the outside of the cantilever 4 when the first abutting surface 401 abuts against the locking part 602, so as to prevent the cantilever 4 from radially deforming and sliding out of the locking part 602 when subjected to rotational resistance.

[0059] Since the stepped end face only requires two stepped structures to form the limiting surface 604, to minimize the circumferential angle occupied by the first protrusion 6 and increase the free state time of the cantilever 4, the stepped end face is preferably a two-layer stepped structure, including a first end face 605 and a second abutment surface 606, as follows. Figure 4 As shown, the second abutment surface 606 is located radially inside the first end face 605 and is recessed inward in the circumferential direction toward the clutch portion 601, thereby forming a limiting surface 604 inside the first end face 605. When the cantilever 4 abuts against the second abutment surface 606, the limiting surface 604 is located outside the cantilever 4, blocking the cantilever 4 and preventing the cantilever 4 from radially expanding and disengaging from the second abutment surface 606.

[0060] Example 3

[0061] Based on Embodiment 2, to prevent the cantilever 4 from detaching from the inner side of the second abutment surface 606 after being deformed under pressure, this embodiment preferably arranges the second abutment surface 606 radially inclined relative to the clutch gear 3, so that an acute angle is formed between the tangent of the second abutment surface 606 and the limiting surface 604. Figure 10As shown, at this time, the second abutment surface 606 is recessed inward on the side facing the limiting surface 604. For example... Figure 3 , Figure 4 and Figure 6 As shown, when the drive gear 1 rotates counterclockwise, the first contact surface 401 of the cantilever 4 engages with the locking part 602 of the clutch gear 3, causing the clutch gear 3 to rotate. Simultaneously, due to the inclination angle of the second contact surface 606, the first contact surface 401 slides radially outward along the second contact surface 606 during the locking process. This increases the stress on the cantilever 4 and the locking part 602, making the locking more secure. At the same time, the inclination angle of the second contact surface 606 prevents the cantilever 4 from sliding inward, thus preventing the slippage mechanism 12 from failing, and also provides some cushioning to the cantilever 4, preventing excessive impact and permanent deformation of the cantilever 4.

[0062] Correspondingly, in order to make the first abutment surface 401 fit as closely as possible to the second abutment surface 606, the first abutment surface 401 is also arranged radially inclined relative to the drive gear 1, and the inclination direction of the first abutment surface 401 is opposite to the inclination direction of the second abutment surface 606.

[0063] Let the inclination angle of the first abutment surface 401 be α, and the inclination angle of the second abutment surface 606 relative to the radial direction of the clutch gear 3 be β. If α < β, the first abutment surface 401 will not easily slide outward along the radial direction of the second abutment surface 606, and the abutment effect of the two will be reduced. Therefore, it is preferable that α ≥ β, so that after the cantilever 4 deforms to a stable state in the radial direction during locking, the included angle between the first abutment surface 401 and the second abutment surface 606 is very small or they are directly in contact, which increases the contact area and reduces the wear of sharp parts.

[0064] The tilt angles of the first abutment surface 401 and the second abutment surface 606 also affect the abutment effect. An excessively large tilt angle is detrimental to end face processing and can easily cause sharp-end breakage. Therefore, preferably, 0 < α < 60° and 0 < β < 60°. In this embodiment, β = 10° and α = 15°. When β is 10°, the cantilever 4 locks more securely, while when α is 15° (greater than 10° of β), the first abutment surface 401 of the cantilever 4 slides on the second abutment surface 606 of the clutch disc 2, causing the cantilever 4 to completely abut against the locking part 602. Simultaneously, this slight deformation allows the first abutment surface 401 and the second abutment surface 606 to overlap, resulting in a more secure lock.

[0065] Example 4

[0066] Based on the above embodiments, this embodiment designs the contact surface between the slipping part 603 and the cantilever 4 to ensure that the friction between the cantilever 4 and the slipping part 603 is sufficient to drive the clutch part 601 to rotate when the cantilever 4 reverses.

[0067] The slip portion 603 has a radial protrusion 607 that radially presses against the cantilever 4, and the radial protrusion 607 is provided on the side near the clutch portion 601. For example... Figures 6-8 As shown, taking one of the cantilever arms 4 as an example, its motion state is described. The relevant first protrusions 6 that cooperate with it are named protrusion A8 and protrusion B9 respectively. Figure 6 In the middle, the cantilever 4 abuts against the locking part 602 of the protrusion A8, when the drive gear 1 moves from... Figure 6 When the locking state is reversed and rotated clockwise, the cantilever 4 first passes the second protrusion 7 between protrusion A8 and protrusion B9 before reaching protrusion B9. The radial protrusion 607 on the inner side of protrusion B9 presses against the cantilever 4. The radial protrusion 607 increases the pressing force on the cantilever 4, enabling the cantilever 4 to drive the clutch disc 2 to rotate. Figure 8 In the state shown, the protrusion B9 abuts against the second protrusion 7 in front of it in the direction of rotation. Except for the radial protrusion 607, the other surfaces of the slip portion 603 exert less pressure on the cantilever 4. Therefore, in the slip state, the cantilever 4 will only be subjected to greater pressure at the radial protrusion 607 during rotation, the deformation time is short, the radial protrusion 607 and the other surfaces of the slip portion 603 can transition smoothly, and the cantilever 4 will not produce radial abrupt changes.

[0068] When the cantilever 4 slips past the radial protrusion 607 and suddenly rotates forward, the radial protrusion 607 will hinder the forward rotation of the cantilever 4. Therefore, the end of the cantilever 4 needs to be optimized, such as... Figure 11 As shown, the free end of the cantilever 4 has an inwardly tapering transition surface 402 on its outer side, which can pass arbitrarily from both sides of the radial protrusion 607. When the cantilever 4... Figure 11 When the right side of the radial protrusion 607 moves to the left, the transition surface 402 is in the same direction of inclination as the right slope of the radial protrusion 607, which helps the cantilever 4 to cross the right slope of the radial protrusion 607.

[0069] Furthermore, in this embodiment, with the radial protrusion 607 provided, the outer surface of the cantilever 4 is designed accordingly. Specifically, the outer side of the cantilever 4 has a ramp surface 403 connected to the transition surface 402, and the ramp surface 403 gradually extends radially outward from the side away from the free end of the cantilever 4 to the side closer to the free end of the cantilever 4. Figure 11 As shown, at the contact point between the front end of the cantilever 4 and the clutch disc 2, there is a ramp surface 403. When it rotates to the position of the radial protrusion 607, the ramp surface 403 contacts and adheres to the radial protrusion 607, driving the clutch disc 2 to move. Furthermore, there is a certain frictional force between the cantilever 4 and the radial protrusion 607, which can assist the cantilever 4 in driving the clutch disc 2 to rotate. With this design, the cantilever 4 exerts almost no impact on the clutch disc 2, effectively reducing noise and extending the lifespan of the cantilever 4 structure.

[0070] Example 5

[0071] In the above embodiment, when slipping, the inner diameter of the mating surfaces of the locking part 602 and the connecting part 701 will affect the motion noise of the whole machine. If the inner diameter of the connecting part 701 at the mating surface of the connecting part 701 and the locking part 602 is larger than the inner diameter of the locking part 602 at that location, the inner side of the clutch disc 2 will protrude from the inner side of the clutch gear 3 at the mating surface. The cantilever 4 may suddenly move from the pressed state to the relaxed state, which may cause it to hit the clutch gear 3 and generate noise.

[0072] Therefore, this embodiment makes the following improvement based on the above embodiment: when the connecting part 701 and the locking part 602 are engaged, the inner diameter of the connecting part 701 located at the mating surface of the connecting part 701 and the locking part 602 is smaller than the inner diameter of the locking part 602 at that location, and larger than the minimum inner diameter of the slippage part 603 (e.g., Figure 9 (As shown). When the cantilever 4 rotates from the locking part 602 of the clutch disc 2 to the engagement part 701 of the clutch gear 3, the cantilever 4 moves from a relatively loose state to a tightened state. The cantilever 4 will not collide with the clutch gear 3 or the clutch disc 2, thus preventing noise. This design is mainly to prevent machining errors from causing the height difference at the mating surface to not meet requirements.

[0073] Example 6

[0074] After the drive gear 1 and clutch disc 2 are assembled, the slip part 603 on the clutch disc 2 will press the cantilever 4 on the drive gear 1. During processing, the slip part 603 protrudes inward with the arc of the limiting surface 604 as the reference. If the height of the slip part 603 is too large, it will easily cause the cantilever 4 to deform too much, which may lead to permanent deformation. At the same time, a suitable protrusion height can not only reduce the deformation, but also reduce the slipping force during slipping. When the slipping speed is too fast, it will not generate a lot of noise.

[0075] Therefore, this embodiment limits the protrusion height of the slippage part 603, specifically, as follows: Figure 11 As shown, the radial distance between the arc surface where the limiting surface 604 is located and the radially inner side of the first protrusion 6 is X, where 0 < X ​​< 1 mm. This distance limitation mainly applies to the transition area of ​​the slip portion 603. When the slip portion 603 is provided with a radial protrusion 607, since the area of ​​the radial protrusion 607 is small, the deformation time caused to the cantilever 4 is short. Therefore, the value of X here can be greater than 1 mm, that is, the value of X represents the protrusion height of the slip portion 603 between the radial protrusion 607 and the second abutment surface 606 in the figure. In this embodiment, X = 0.7 mm. At this distance, the deformation of the cantilever 4 is small, the slipping force is also small, and no large noise is generated during the slipping process.

[0076] Example 7

[0077] A liquid adding pump includes a drive motor 11 and one or more slipping mechanisms 12 connected to the drive motor 11, wherein the drive gear 1 of the slipping mechanism 12 meshes with the output end of the drive motor 11 for transmission.

[0078] When the slippage mechanism 12 is locked, the cantilever 4 drives the clutch disc 2, which in turn drives the clutch gear 3, enabling the liquid pump to operate. When the mechanism slips, the cantilever 4 cannot drive the clutch disc 2, and the liquid pump does not operate.

[0079] The drive motor 11 can be connected to only one slip mechanism 12, so that the working parts can be started or stopped without stopping the drive motor 11.

[0080] In common scenarios, the drive motor 11 is connected to two slipping mechanisms 12 to form a dual-station pump, such as in the dispensing system of household appliances like dishwashers or washing machines. Typically, there are two dispensing chambers, each containing two different detergents. The two detergents are not dispensed simultaneously. The two slipping mechanisms 12 are placed in the two chambers respectively, and the drive gears 1 of the two slipping mechanisms 12 simultaneously mesh with the output end of the drive motor 11. When the drive motor 11 rotates forward, one slipping mechanism 12 is in a locked state, dispensing detergent into that chamber, while the other slipping mechanism 12 is in a slipping state. When the drive motor 11 rotates in reverse, the two slipping mechanisms 12 switch states.

[0081] The driving gear 1 can be a spur gear, and the output shaft of the drive motor 11 that meshes with it is also equipped with a spur gear. In the slip mechanism 12 of the typical delivery system, the driving gear 1 is a helical gear, and the output shaft of the drive motor 11 that meshes with it is also equipped with a helical gear.

[0082] like Figure 12 As shown, the helical gear is installed on one side of the drive motor 11 of the DC dual pump. When the drive motor 11 is started, the pump chamber on one side works normally, while the pump chamber on the other side does not work due to the slippage of the slipping mechanism 12. In this way, the operation of the two pump chambers can be controlled in an orderly manner by controlling the forward and reverse rotation of the drive motor 11.

[0083] In the description of this invention, it should be understood that the terms "center", "left", "right", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0084] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0085] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0086] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A slip-off mechanism, characterized in that, include: A drive gear, one end of which is fixed with a cantilever, and one end of the cantilever forms a first contact surface; A clutch disc is arranged coaxially with the drive gear. The clutch disc is provided with a clutch part, a locking part, and a slipping part connecting the clutch part and the locking part. The clutch gear is arranged coaxially with the driving gear, and the clutch gear is provided with an engagement part and an abutment part; When the drive gear rotates in the first direction, the first contact surface, the locking part and the joint part can contact each other in sequence. At this time, the slipping mechanism is in the locked state, and the drive gear pushes the clutch gear to rotate through the clutch disc. When the drive gear rotates in the opposite direction of the first direction, the cantilever and the slipping part squeeze and rub against each other, causing the clutch disc to rotate until the locking part of the clutch disc engages with the engagement part of the clutch gear, so that the cantilever smoothly transitions to the locking part. At this time, the slipping mechanism is in a slipping state, and the drive gear cannot drive the clutch gear to rotate.

2. The slippage mechanism according to claim 1, characterized in that: The clutch disc is fixed with a first protrusion. The clutch part and the locking part are located at the two circumferential ends of the first protrusion. The slipping part is located in the middle of the first protrusion. The radial inner side of the slipping part is squeezed and rubbed against the cantilever.

3. The slippage mechanism according to claim 2, characterized in that: One end of the clutch gear is fixed with a second protrusion that corresponds one-to-one with the first protrusion, and the engagement part and the abutment part are located at the two circumferential ends of the second protrusion.

4. The slippage mechanism according to claim 3, characterized in that: The first and second protrusions are arranged intersectingly in the circumferential direction.

5. The slippage mechanism according to claim 3, characterized in that: The circumferential end face of the locking part is a stepped end face that gradually protrudes circumferentially from the inside to the outside. When the slipping mechanism is in the locked state, the first abutting surface abuts against the end face of the locking part near the inside, and the locking part has a limiting surface that covers the outside of the cantilever.

6. The slippage mechanism according to claim 5, characterized in that: The end face of the locking part that abuts against the first abutting surface is designated as the second abutting surface. The second abutting surface is arranged radially inclined relative to the clutch gear so that an acute angle is formed between the tangent of the second abutting surface and the limiting surface.

7. The slippage mechanism according to claim 6, characterized in that: The first contact surface is arranged radially inclined relative to the drive gear, and the inclination angle is α. The second contact surface is arranged radially inclined relative to the clutch gear, and the inclination angle is β. Then β≤α.

8. The slippage mechanism according to claim 7, characterized in that: 0＜α＜60，0＜β＜60。 9. The slippage mechanism according to claim 8, characterized in that: β=10°，α=15°。 10. The slippage mechanism according to claim 3, characterized in that: The minimum inner diameter of the second protrusion is greater than the minimum inner diameter of the first protrusion.

11. The slippage mechanism according to claim 3, characterized in that: The slip portion has a radial protrusion that radially presses against the cantilever, and the radial protrusion is located near the clutch portion.

12. The slippage mechanism according to claim 11, characterized in that: The free end of the cantilever has an inwardly tapering transition surface on its outer side, which can pass arbitrarily from either side of the radial protrusion.

13. The slippage mechanism according to claim 12, characterized in that: The outer side of the cantilever has a ramp surface connected to the transition surface, which gradually extends radially outward from the side away from the free end of the cantilever to the side closer to the free end of the cantilever.

14. The slippage mechanism according to claim 1, characterized in that: When the connecting part and the locking part are engaged, the inner diameter of the connecting part at the mating surface of the connecting part and the locking part is smaller than the inner diameter of the locking part at that location, but larger than the minimum inner diameter of the slipping part.

15. The slippage mechanism according to claim 3, characterized in that: The inner surface of the second protrusion is an inclined surface that transitions between the joint and the abutment.

16. The slippage mechanism according to claim 5, characterized in that: If the radial distance between the arc surface where the limiting surface is located and the radial inner side of the first protrusion is X, then 0 < X ​​< 1 mm.

17. The slippage mechanism according to claim 16, characterized in that: X=0.7mm.

18. The slippage mechanism according to any one of claims 3-17, characterized in that: The first protrusion protrudes from the surface of the clutch disc toward the drive gear.

19. A liquid dispensing pump, characterized in that: The liquid pump includes a drive motor and one or two slip mechanisms as described in any one of claims 1-18 connected to the drive motor, wherein the drive gear of the slip mechanism meshes with the output end of the drive motor for transmission.

20. A delivery system, characterized in that: Includes the liquid pump as described in claim 19.

21. A household appliance, characterized in that: Includes the delivery system as described in claim 20.

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