Self-positioning switcher

Abstract

The invention 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 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] The present invention relates to the technical field of washing devices, in particular to the technical field of switches for washing devices. Background Art

[0002] With the advancement of technology, fully automatic washing machines on the market have gradually developed the function of automatic detergent dispensing (that is, through program control and using a dispensing pump to automatically dispense detergent temporarily stored in a storage container into the washing tub to participate in washing according to the calculated dispensing amount); existing fully automatic dispensing washing machines usually dispense a variety of detergents, such as laundry detergent, softener and disinfectant, etc.; this has led to the fact that fully automatic dispensing washing machines have to install multiple dispensing pumps to dispense different detergents separately; however, the more dispensing pumps are assembled, the more complex the assembly structure is, and the assembly cost will also increase accordingly.

[0003] Based on this, the invention with announcement number CN214613149U discloses a switch; the switch can drive the camshaft (having multiple protrusions arranged in sequence along the axial direction) to rotate a specified angle, so that the specified protrusions abut against the corresponding valve core (control the valve core movement and disengage the blockage of the corresponding inlet or outlet), and finally realize multi-way switching control.

[0004] In order to read the work position status, the switching valve chooses to open a hole on the driving wheel so that the driving wheel can serve as a coding disk, and the coding disk is read through an external detection switch to achieve control; however, when adopting this design, if eight positions need to be detected, at least three detection switches must be installed. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose a self-positioning switcher that can simplify the structure and reduce costs while taking into account the accuracy of switching.

[0006] To achieve the above-mentioned purpose, the present invention proposes a self-positioning switch, which has a monitoring mechanism that can monitor whether the camshaft is rotated into place. The monitoring mechanism includes a coding wheel and a micro switch. The coding wheel rotates in conjunction with the camshaft and has a plurality of raised portions on the periphery. Each of the raised portions can squeeze the micro switch separately as the coding wheel rotates.

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

[0008] Preferably, an elastic buffer component is provided between the encoding wheel and the micro switch to buffer the squeezing force.

[0009] Preferably, the elastic buffer assembly includes a protective shell, a movable plug and a spring, the micro switch is built into the protective shell and is indirectly connected to the movable plug through the spring, and one end of the movable plug extends out of the protective shell and is arranged toward the encoding wheel.

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

[0011] Preferably, the first inclined surface and the second inclined surface are further extended at the corners to form a first plane and a second plane that can abut against each other.

[0012] Preferably, each time the micro switch is pushed and disconnected, it represents that the camshaft has rotated to a specified point.

[0013] Preferably, a positioning card is provided between the micro switch and the movable plug, and the adjacent ends of the movable plug and the positioning card are respectively provided with a first core column and a second core column for the spring to be fitted. The positioning card and the micro switch are plugged into a socket and a plug, and the positioning card is also provided with a plurality of clamping heads on the periphery that can be respectively connected with the protective shell.

[0014] Preferably, it also includes a switching valve body, a motor and a valve core, the switching valve body has a plurality of inlets and outlets and each inlet and outlet is blocked by a valve core in a natural state, the camshaft is provided with mutually staggered protrusions corresponding to each valve core in sequence along the axial direction, the motor can drive the camshaft to rotate and make any protrusion support the corresponding valve core to open the specified inlet and outlet.

[0015] Preferably, a transmission assembly is installed between the motor and the camshaft, and the transmission assembly includes a first gear, a second gear, a third gear and a fourth gear. The first gear is installed at 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 respectively. Several fourth gears are meshed outside the third gear, and each fourth gear is coaxially installed with a camshaft.

[0016] Beneficial effects of the present invention: 1) By adding a monitoring mechanism with a coding wheel and a micro switch, and using a transmission assembly to rotate the coding wheel in conjunction with the camshaft, 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 coding wheel can also use the outer protrusion to accurately squeeze the micro switch during the rotation of the camshaft. With only one micro switch, multi-point detection can be achieved, ensuring accurate reading of the workstation status (improving the reliability of the device) while avoiding the complexity and high cost of installing multiple detection switches in traditional designs. This is not only very suitable for multi-detergent dispensing systems of washing machines, but can also be extended to other fields requiring multi-channel switching control, showing broad application prospects. 2) By adding an elastic buffer component (including a protective shell, a movable plug and a spring) between the code wheel and the micro switch, the direct squeezing force of the code wheel on the micro switch can be effectively buffered, reducing mechanical wear and extending the service life of the micro switch and code wheel; 3) The use of a beveled design between the movable plug and the raised portion effectively reduces the risk of jamming, and the limiting rib prevents the movable plug from completely separating from the protective shell, further enhancing the stability and safety of the device. 4) By plugging the positioning clamp into the micro switch via the socket and the plug, the spring is fitted into the movable plug and the positioning clamp through the first and second stems, and the positioning clamp is engaged with the protective shell. This modular design facilitates the rapid assembly and maintenance of different accessories, thereby improving production and maintenance efficiency. 5) By making the protrusion amplitude of at least one of the protrusions inconsistent with that of the other protrusions, a special position signal width can be generated by the special protrusion, so that the remaining positions can be positioned with the special position as the origin, ultimately making it easier for users to accurately locate each switching signal.

[0017] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the self-positioning switch of the present invention; Figure 2 yes Figure 1 AA section view; Figure 3 yes Figure 2 An enlarged schematic diagram of point F; Figure 4 yes Figure 1 EE cross-sectional view; Figure 5 It is an exploded schematic diagram of a partial structure of the self-positioning switch of the present invention; Figure 6is a top view of the self-positioning switch of the present invention; Figure 7 yes Figure 6 BB cross-sectional view; Figure 8 yes Figure 6 CC sectional view; Figure 9 yes Figure 6 DD sectional view; Figure 10 It is a switching signal diagram of the micro switch of the self-positioning switch of the present invention.

[0019] In the figure: 1-switching valve body, 11-inlet and 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-movable plug, 641-first inclined surface, 642-first core column, 643-limiting rib, 65-spring, 66-positioning clamp, 661-second core column, 662-socket, 663-clamp. DETAILED DESCRIPTION

[0020] See Figures 1 to 10 The self-positioning switch of the present invention has a monitoring mechanism 6 that can monitor whether the camshaft 4 is rotated into place. The monitoring mechanism 6 includes a coding wheel 61 and a micro switch 62. The coding wheel 61 rotates in conjunction with the camshaft 4 and has a plurality of protrusions 611 on the periphery. Each of the protrusions 611 can squeeze the micro switch 62 respectively as the coding wheel 61 rotates.

[0021] The protrusion amplitude of at least one of the protrusions 611 is inconsistent with that of the other protrusions 611; if the protrusion size of each protrusion 611 is the same, then the width of the position signal of each protrusion 611 will be the same; this results in the system only being able to know that it has reached a switching position, but cannot determine which one this position corresponds to; when a protrusion 611 with a unique protrusion amplitude is set, the user can find the position corresponding to the protrusion 611, and then use this position as the origin to locate the remaining positions.

[0022] An elastic buffer component is also provided between the encoding wheel 61 and the micro switch 62 to buffer the squeezing force.

[0023] The elastic buffer assembly includes a protective shell 63, a movable plug 64 and a spring 65. The micro switch 62 is built into the protective shell 63 and is indirectly connected to the movable plug 64 through the spring 65. One end of the movable plug 64 extends out of the protective shell 63 and is arranged toward the encoding wheel 61.

[0024] The movable plug 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 assist the protrusion 611 to press down the elastic buffer component.

[0025] The first inclined surface 641 and the second inclined surface are further extended at the corners to form a first plane and a second plane that can abut against each other; wherein the cooperation between the first plane and the second plane can help the micro switch 62 to reset as quickly as possible.

[0026] Each time the micro switch 62 is pushed and disconnected, it represents that the camshaft 4 has rotated to a specified point. Due to product tolerances, the time point when the ramp squeeze switch is turned on may vary greatly. Based on this, the present invention makes the disconnection node into a straight edge so that the disconnection time can be instantaneous, thereby effectively improving the positioning accuracy.

[0027] A positioning card 66 is also provided between the micro switch 62 and the movable plug 64. The adjacent ends of the movable plug 64 and the positioning card 66 are respectively provided with a first core column 642 and a second core column 661 for the spring 65 to be mounted. The positioning card 66 and the micro switch 62 are plugged into the socket 662 and the plug 621. The positioning card 66 is also provided with a plurality of clamping heads 663 on the periphery that can be respectively engaged with the protective shell 63; in addition, the movable plug 64 is also provided with a limit rib 643 outside the protective shell 63 to limit itself from fully extending out of the protective shell 63.

[0028] It also includes a switching valve body 1, a motor 2 and a valve core 3. The switching valve body 1 has a plurality of inlets and outlets 11, and each inlet and outlet 11 is blocked by a valve core 3 in a natural state. The camshaft 4 is provided with mutually staggered protrusions corresponding to each valve core 3 in sequence along the axial direction. The motor 2 can drive the camshaft 4 to rotate and make any protrusion support the corresponding valve core 3 to open the specified inlet and outlet 11.

[0029] 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 installed with a camshaft 4.

[0030] A first ratchet 55 is further 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 a pump) through the second ratchet when moving in the reverse direction, so that the motor 2 uses the first ratchet 55 and the second ratchet to drive different components to work when rotating forward and reverse (the introduction of this ratchet structure realizes the multi-functional drive of the motor 2 and improves the flexibility and functionality of the device).

[0031] Working process of the present invention: When in use, the motor 2 drives the camshaft 4 to rotate a certain angle through the transmission assembly 5, so that the corresponding valve core 3 is supported by the designated protrusion located on the camshaft 4, so that the supported valve core 3 no longer blocks the inlet and outlet 11, and finally the designated detergent is released; in addition, the monitoring mechanism 6 can monitor in real time whether the camshaft 4 is rotated into place, thereby reading the working position status of the device.

[0032] During operation, the transmission assembly 5 can transmit the power of the motor 2 to the camshaft 4 on the one hand, and can also synchronously drive the monitoring mechanism 6 to operate on the other hand; 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, and the second gear 52 can simultaneously drive the encoding wheel 61 and the second gear 53 located on both sides thereof to rotate; wherein, during the rotation, the encoding wheel 61 can use each protrusion 611 to respectively squeeze the movable plug 64, thereby indirectly contacting the micro switch 62 (such as Figure 10 As shown, each time the micro switch 62 is turned on and off, it represents that the camshaft 4 has rotated to the desired position. In addition, the second gear 53 can simultaneously drive the fourth gears 54 located on its outer edge to rotate, and each fourth gear 54 can respectively drive the corresponding camshaft 4 to rotate (as shown in FIG. Figure 4 As shown, this embodiment takes two second gears 53 and two camshafts 4 as an example).

[0033] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. Self-positioning switch, characterized by: A monitoring mechanism (6) is provided for monitoring whether the camshaft (4) is rotated to a desired position. The monitoring mechanism (6) comprises a coding wheel (61) and a micro switch (62). The coding wheel (61) rotates in conjunction with the camshaft (4) and is provided with a plurality of raised portions (611) on the periphery. Each of the raised portions (611) can press the micro switch (62) respectively as the coding wheel (61) rotates.

2. The self-positioning switch according to claim 1, wherein: The protrusion amplitude of at least one of the protrusions (611) is inconsistent with that of the other protrusions (611).

3. The self-positioning switch according to claim 1, wherein: An elastic buffer component is also provided between the coding wheel (61) and the micro switch (62) to buffer the squeezing force.

4. The self-positioning switch according to claim 3, wherein: The elastic buffer assembly includes a protective shell (63), a movable bolt (64) and a spring (65). The micro switch (62) is built into the protective shell (63) and is indirectly connected to the movable bolt (64) through the spring (65). One end of the movable bolt (64) extends out of the protective shell (63) and is arranged toward the encoding wheel (61).

5. The self-positioning switch according to claim 4, wherein: The movable plug (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.

6. The self-positioning switch according to claim 5, wherein: The first inclined surface (641) and the second inclined surface are further extended at the corners to form a first plane and a second plane that can abut against each other.

7. The self-positioning switch according to claim 6, wherein: Each time the micro switch (62) is pushed and disconnected, it represents that the camshaft (4) has rotated to a specified point.

8. The self-positioning switch according to claim 4, wherein: A positioning card (66) is further provided between the micro switch (62) and the movable plug (64), and adjacent ends of the movable plug (64) and the positioning card (66) are respectively provided with a first core column (642) and a second core column (661) for the spring (65) to be set. The positioning card (66) and the micro switch (62) are plugged into each other through the socket (662) and the plug (621), and the positioning card (66) is further provided with a plurality of clamping heads (663) on the periphery that can be respectively connected to the protective shell (63).

9. The self-positioning switch according to any one of claims 1 to 8, characterized in that: The invention also includes a switching valve body (1), a motor (2) and a valve core (3), wherein the switching valve body (1) has a plurality of inlets and outlets (11) and each inlet and outlet (11) is blocked by the valve core (3) in a natural state, and the camshaft (4) is provided with mutually staggered protrusions corresponding to each valve core (3) in sequence along the axial direction, and the motor (2) can drive the camshaft (4) to rotate and make any protrusion support the corresponding valve core (3) to open the specified inlet and outlet (11).

10. The self-positioning switch according to claim 9, wherein: A transmission assembly (5) is installed between the motor (2) and the camshaft (4), and 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). A plurality of fourth gears (54) are meshed outside the third gear (53), and each fourth gear (54) is coaxially installed with a camshaft (4).

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