Self-positioning switcher

Abstract

The utility model discloses a self-positioning switcher which is provided with a monitoring mechanism capable of monitoring whether a cam shaft rotates in place or not, the monitoring mechanism comprises a coding wheel and a microswitch, the coding wheel and the cam shaft rotate in a linkage mode, a plurality of protruding parts are arranged on the periphery of the coding wheel, and the protruding parts can extrude the microswitch respectively along with autorotation of the coding wheel. The switching accuracy can be considered while the structure is simplified and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of washing devices, and in particular to the technical field of washing device switchers. Background Technology

[0002] With technological advancements, fully automatic washing machines on the market have begun to feature automatic detergent dispensing (i.e., the detergent, temporarily stored in a container, is automatically dispensed into the washing tub using a dispensing pump controlled by a program and according to a calculated amount). Existing fully automatic dispensing washing machines typically dispense multiple detergents, such as laundry liquid, fabric softener, and disinfectant. This necessitates the installation of multiple dispensing pumps to dispense different detergents separately. However, the more dispensing pumps are installed, the more complex the assembly structure becomes, and the higher the assembly cost.

[0003] Based on this, the utility model with announcement number CN214613149U discloses a switcher; the switcher can rotate a specified angle by driving a camshaft (with multiple protrusions arranged alternately along the axial direction), so that the specified protrusions abut against the corresponding valve core (controlling the valve core to move and disengage from the blockage of the corresponding inlet or outlet), and finally realize multi-channel switching control.

[0004] To read the station status, the switching valve has a hole drilled in the drive wheel to make the drive wheel act as an encoder, and the encoder is read by an external detection switch to achieve control. However, if eight positions need to be detected, at least three detection switches must be installed when adopting this design. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a self-positioning switcher that can simplify the structure and reduce costs while ensuring the accuracy of switching.

[0006] To achieve the above objectives, this utility model proposes a self-positioning switch with a monitoring mechanism that can monitor whether the camshaft has rotated to the correct position. The monitoring mechanism includes an encoder wheel and a micro switch. The encoder wheel rotates in conjunction with the camshaft and has several protrusions on its periphery. Each of the protrusions can press the micro switch as the encoder wheel rotates.

[0007] Preferably, the protrusion amplitude of at least one of the protrusions is different from that of the other protrusions.

[0008] Preferably, the encoder wheel and the micro switch are further connected by an elastic buffer assembly to buffer the compressive force.

[0009] Preferably, the elastic buffer assembly includes a protective shell, a movable pin, and a spring. The micro switch is built into the protective shell and indirectly connected to the movable pin through the spring. One end of the movable pin extends out of the protective shell and is positioned towards the encoder wheel.

[0010] Preferably, the movable bolt and the adjacent ends of each protrusion are provided with a first inclined surface and a second inclined surface that can abut against each other.

[0011] Preferably, the first and second inclined surfaces are further provided with a first plane and a second plane that can abut and cooperate with each other at the corner.

[0012] Preferably, the moment the micro switch is pushed open represents the moment the camshaft reaches a designated position.

[0013] Preferably, a positioning clip is provided between the micro switch and the movable pin. The adjacent ends of the movable pin and the positioning clip are respectively provided with a first core post and a second core post for spring assembly. The positioning clip and the micro switch are connected by a socket and a plug. The positioning clip is also provided with several clips on its periphery that can be respectively engaged with the protective shell.

[0014] Preferably, the system also includes a switching valve body, a motor, and a valve core. The switching valve body has several inlets and outlets, each of which is blocked by a valve core in its natural state. The camshaft is provided with staggered protrusions along the axial direction, each corresponding to a valve core. The motor can drive the camshaft to rotate and cause any protrusion to push against the corresponding valve core to open the specified inlet or outlet.

[0015] Preferably, a transmission assembly is installed between the motor and the camshaft. The transmission assembly includes a first gear, a second gear, a third gear, and a fourth gear. The first gear is installed on the output shaft of the motor and meshes with the second gear. The second gear is coaxially connected to the encoder wheel and the third gear. Several fourth gears mesh with the third gear, and each fourth gear is coaxially mounted with a camshaft.

[0016] The beneficial effects of this utility model are:

[0017] 1) By adding a monitoring mechanism with an encoder wheel and a micro switch, and using a transmission component to make the encoder wheel and camshaft rotate in linkage, the motor can synchronously transmit power to the camshaft and the monitoring mechanism, realizing the integration of power and detection. On the other hand, the encoder wheel can use the outer protrusion to precisely squeeze the micro switch during the rotation of the camshaft. With only one micro switch, the purpose of multi-point detection can be achieved, ensuring accurate reading of the workstation status (improving the reliability of the device). At the same time, it avoids the complexity and high cost of installing multiple detection switches in traditional designs. It is not only very suitable for multi-detergent dispensing systems in washing equipment, but can also be extended to other fields that require multi-channel switching control, with broad application prospects.

[0018] 2) By adding an elastic buffer assembly (including a protective shell, a movable pin, and a spring) between the encoder wheel and the micro switch, the direct squeezing force of the encoder wheel on the micro switch can be effectively buffered, reducing mechanical wear and extending the service life of the micro switch and the encoder wheel;

[0019] 3) By using a beveled fit design between the movable pin and the protrusion, the risk of jamming can be effectively reduced, and the limiting stop can also prevent the movable pin from completely detaching from the protective shell, further enhancing the stability and safety of the device.

[0020] 4) By connecting the positioning clip and the micro switch through the socket and plug, the spring is fitted with the movable pin and the positioning clip through the first core and the second core respectively, and the positioning clip is engaged with the protective shell. This modular design facilitates the rapid assembly and maintenance of different parts, improving production efficiency and maintenance efficiency.

[0021] 5) By making the protrusion amplitude of at least one of the protrusions different from that of the other protrusions, a special position signal amplitude can be generated through the special protrusion, thereby positioning the remaining positions with the position as the origin, which ultimately makes it easier for the user to accurately position each switching signal.

[0022] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0023] Figure 1 This is the front view of the self-positioning switch of this utility model;

[0024] Figure 2 yes Figure 1 Sectional view along axis AA;

[0025] Figure 3 yes Figure 2 An enlarged schematic diagram at point F;

[0026] Figure 4 yes Figure 1 EE-directed sectional view;

[0027] Figure 5 This is an exploded view of part of the structure of the self-positioning switch of this utility model;

[0028] Figure 6 This is a top view of the self-positioning switch of this utility model;

[0029] Figure 7 yes Figure 6 BB-direction sectional view;

[0030] Figure 8 yes Figure 6 CC-direction sectional view;

[0031] Figure 9 yes Figure 6 DD section view;

[0032] Figure 10 This is a diagram of the switching signal of the micro switch in the self-positioning switch of this utility model.

[0033] In the diagram: 1-Switching valve body, 11-Inlet / outlet, 2-Motor, 3-Valve core, 4-Camshaft, 5-Transmission assembly, 51-First gear, 52-Second gear, 53-Second gear, 54-Fourth gear, 55-First ratchet, 6-Monitoring mechanism, 61-Encoding wheel, 611-Protrusion, 62-Micro switch, 621-Plug, 63-Protective shell, 64-Moving bolt, 641-First inclined surface, 642-First core post, 643-Limit stop, 65-Spring, 66-Positioning clip, 661-Second core post, 662-Socket, 663-Clip head. Detailed Implementation

[0034] See Figures 1 to 10 The present invention provides a self-positioning switcher with a monitoring mechanism 6 that can monitor whether the camshaft 4 has rotated into position. The monitoring mechanism 6 includes an encoder wheel 61 and a micro switch 62. The encoder wheel 61 rotates in conjunction with the camshaft 4 and has several protrusions 611 on its periphery. Each of the protrusions 611 can press the micro switch 62 as the encoder wheel 61 rotates.

[0035] At least one of the protrusions 611 has a different protrusion amplitude than the other protrusions 611. If the protrusion size of each protrusion 611 is the same, then the amplitude of the position signal of each protrusion 611 will be the same. This results in the system only knowing that it has reached a switching position, but not being able to determine which position this position corresponds to. When a protrusion 611 with a unique protrusion amplitude is set, the user can locate the remaining position by using that position as the origin after finding the position corresponding to the protrusion 611.

[0036] The encoder wheel 61 and the micro switch 62 are also connected by an elastic buffer assembly to buffer the squeezing force.

[0037] The elastic buffer assembly includes a protective shell 63, a movable pin 64, and a spring 65. The micro switch 62 is built into the protective shell 63 and is indirectly connected to the movable pin 64 through the spring 65. One end of the movable pin 64 extends out of the protective shell 63 and is positioned towards the encoder wheel 61.

[0038] The movable bolt 64 and the adjacent ends of each protrusion 611 are respectively provided with a first inclined surface 641 and a second inclined surface that can abut against each other; during operation, the cooperation between the first inclined surface 641 and the second inclined surface can help the protrusion 611 press down the elastic buffer component.

[0039] The first inclined surface 641 and the second inclined surface are further provided with a first plane and a second plane that can abut against each other at the corner; wherein, the cooperation between the first plane and the second plane can help the micro switch 62 to reset as soon as possible.

[0040] The moment the micro switch 62 is pushed off each time it represents the moment the camshaft 4 rotates to a designated position. Due to product tolerances, the timing of the ramp squeeze switch's conduction may vary significantly. Based on this, this invention improves positioning accuracy by making the disconnection node a straight-edge fit, allowing the disconnection time to be instantaneous.

[0041] A positioning clip 66 is provided between the micro switch 62 and the movable pin 64. The adjacent ends of the movable pin 64 and the positioning clip 66 are respectively provided with a first core post 642 and a second core post 661 for the spring 65 to be installed. The positioning clip 66 and the micro switch 62 are connected to each other through a socket 662 and a plug 621. The positioning clip 66 is also provided with several clips 663 on its periphery that can be engaged with the protective shell 63. In addition, a limiting stop 643 is provided outside the movable pin 64 to limit its complete extension out of the protective shell 63.

[0042] It also includes a switching valve body 1, a motor 2 and a valve core 3. The switching valve body 1 has a number of inlets and outlets 11, and each inlet and outlet 11 is blocked by the valve core 3 in its natural state. The camshaft 4 is provided with staggered protrusions along the axial direction, which correspond one-to-one with each valve core 3. The motor 2 can drive the camshaft 4 to rotate and make any protrusion push against the corresponding valve core 3 to open the specified inlet and outlet 11.

[0043] A transmission assembly 5 is installed between the motor 2 and the camshaft 4. The transmission assembly 5 includes a first gear 51, a second gear 52, a third gear 53 and a fourth gear 54. The first gear 51 is installed at the output shaft of the motor 2 and meshes with the second gear 52. The second gear 52 is coaxially connected to the encoder wheel 61 and the third gear 53 respectively. Several fourth gears 54 are meshed outside the third gear 53, and each fourth gear 54 is coaxially mounted with a camshaft 4.

[0044] A first ratchet 55 is also provided between the motor 2 and the first gear 51. The first ratchet 55 only allows the first gear 51 to rotate when the motor 2 moves in a specified direction (for example, the first ratchet 55 can drive the first gear 51 to rotate when the motor 2 moves in the forward direction, and keep the first gear 51 stationary when the motor 2 moves in the reverse direction). At this time, the motor 2 can also be linked with other components (such as pumps) through the second ratchet when it moves in the reverse direction, so that the motor 2 can use the first ratchet 55 and the second ratchet to drive different components to work when it moves in the forward and reverse directions respectively (the introduction of this ratchet structure realizes the multi-functional drive of the motor 2 and improves the flexibility and functionality of the device).

[0045] The working process of this utility model:

[0046] In use, the motor 2 drives the camshaft 4 to rotate a certain angle through the transmission component 5, thereby using the designated protrusion on the camshaft 4 to support the corresponding valve core 3, so that the supported valve core 3 no longer blocks the inlet and outlet 11, and finally realizes the dispensing of the designated detergent; in addition, the monitoring mechanism 6 can monitor in real time whether the camshaft 4 has rotated to the correct position, thereby reading the working status of the device.

[0047] During operation, the transmission assembly 5 can transmit the power of the motor 2 to the camshaft 4, and simultaneously drive the monitoring mechanism 6 to move. Specifically, the first gear 51 can rotate under the drive of the motor 2 and drive the second gear 52 located on its outer edge to rotate. The second gear 52 can simultaneously drive the encoder wheel 61 and the second gear 53 located on its sides to rotate. During rotation, the encoder wheel 61 can use its protrusions 611 to squeeze the movable pin 64, thereby contacting the micro switch 62 (such as...) between the spring 65 and the positioning clip 66. Figure 10 As shown, each moment the microswitch 62 turns on and off represents one rotation of the camshaft 4 to its final position; furthermore, the second gear 53 can simultaneously drive each of the fourth gears 54 located on its outer edge to rotate, and each fourth gear 54 can drive the corresponding camshaft 4 to rotate (e.g., ...). Figure 4 As shown, this embodiment takes an example with two second gears 53 and two camshafts 4.

[0048] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A self-positioning switcher, characterized in that: The monitoring mechanism (6) is capable of monitoring whether the camshaft (4) has rotated to the correct position. The monitoring mechanism (6) includes an encoder wheel (61) and a micro switch (62). The encoder wheel (61) rotates in conjunction with the camshaft (4) and has several protrusions (611) on its periphery. Each of the protrusions (611) can press the micro switch (62) as the encoder wheel (61) rotates.

2. The self-positioning switcher as described in claim 1, characterized in that: The protrusion amplitude of at least one of the protrusions (611) is inconsistent with that of the other protrusions (611).

3. The self-positioning switcher as described in claim 1, characterized in that: The encoder wheel (61) and the micro switch (62) are also connected by an elastic buffer assembly to buffer the squeezing force.

4. The self-positioning switcher as described in claim 3, characterized in that: The elastic buffer assembly includes a protective shell (63), a movable pin (64), and a spring (65). The micro switch (62) is built into the protective shell (63) and is indirectly connected to the movable pin (64) through the spring (65). One end of the movable pin (64) extends out of the protective shell (63) and is positioned toward the encoder wheel (61).

5. The self-positioning switcher as described in claim 4, characterized in that: The movable bolt (64) and each of the protrusions (611) are respectively provided with a first inclined surface (641) and a second inclined surface that can abut against each other.

6. The self-positioning switcher as described in claim 5, characterized in that: The first inclined surface (641) and the second inclined surface are further provided with a first plane and a second plane that can abut against each other at the corner.

7. The self-positioning switcher as described in claim 6, characterized in that: The moment the microswitch (62) is pushed off each time it is activated represents the moment when the camshaft (4) rotates to a specified position.

8. The self-positioning switcher as described in claim 4, characterized in that: A positioning clip (66) is provided between the micro switch (62) and the movable pin (64). The adjacent ends of the movable pin (64) and the positioning clip (66) are respectively provided with a first core post (642) and a second core post (661) for the spring (65) to be installed. The positioning clip (66) and the micro switch (62) are connected by a socket (662) and a plug (621). The positioning clip (66) is also provided with several clips (663) on its periphery that can be respectively engaged with the protective shell (63).

9. The self-positioning switcher as described in any one of claims 1 to 8, characterized in that: It also includes a switching valve body (1), a motor (2) and a valve core (3). The switching valve body (1) has several inlets and outlets (11), and each inlet and outlet (11) is blocked by the valve core (3) in its natural state. The camshaft (4) is provided with intersecting protrusions along the axial direction, which correspond one-to-one with each valve core (3). The motor (2) can drive the camshaft (4) to rotate and make any protrusion push against the corresponding valve core (3) to open the specified inlet and outlet (11).

10. The self-positioning switcher as described in claim 9, characterized in that: A transmission assembly (5) is installed between the motor (2) and the camshaft (4). The transmission assembly (5) includes a first gear (51), a second gear (52), a third gear (53), and a fourth gear (54). The first gear (51) is installed at the output shaft of the motor (2) and meshes with the second gear (52). The second gear (52) is coaxially connected to the encoder wheel (61) and the third gear (53) respectively. Several fourth gears (54) mesh with the third gear (53), and each fourth gear (54) is coaxially mounted with a camshaft (4).

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