A garbage disposer forward and reverse centrifugal switch

Abstract

This utility model discloses a forward and reverse centrifugal switch for a garbage disposal unit. To solve the problem that existing centrifugal switches only rotate forward, this utility model adopts a method of stacking two microswitches on one side of the wire box body (2) and stacking two microswitches on the other side of the wire box body (2). A reversing cam (12) is installed between the two microswitches and two other microswitches. The lower end of the reversing cam (12) is connected to the lower end of the reversing rod (1) located outside the wire box body (2) through a short shaft (14). The reversing cam (12) is also connected to the bottom plate (6) of the wire box body (2) through a return spring (13). The short shaft (14) is connected to the bottom plate (6) of the wire box body (2) through a support (20) and a positioning seat (9). The upper end of the reversing rod (1) is in contact with the lifting plate on the centrifuge (10).

Description

Technical Field

[0001] This utility model relates to a garbage disposal unit, and more particularly to a garbage disposal unit forward and reverse centrifugal switch consisting of a centrifuge mounted on a motor shaft and a micro switch that can be connected to the centrifuge. Background Technology

[0002] Chinese patent CN101587797A discloses a centrifugal switch suitable for motor drive, characterized by the following structural features: a centrifuge mounted on a motor shaft and a junction box body connected to the centrifuge; a sliding sleeve axially telescopically engages with the shaft on the centrifuge; a contact electrode assembly housed within the junction box body, with the engagement and disengagement of contacts within the contact electrode assembly controlled by a movable rod front end that rotatably engages with the junction box body; and a toggle lever, the middle of which rotatably engages with one side of the bottom surface of the junction box body and is supported by a torsion spring. The actuating lever has its front end in contact with the bottom surface of the sliding sleeve, and the sliding sleeve controls the rotation of the actuating lever. The tail end of the actuating lever abuts against the movable rod. Therefore, this structure is only suitable for making the motor rotate forward. When the garbage disposal unit is processing kitchen waste, because there are animal bones and shells in the kitchen waste, the broken bones and shells are easy to get stuck in the gaps of the garbage disposal unit, causing the motor to gradually stop. When the motor is restarted, because the rotation direction is still forward, the motor is easy to get stuck, or even cause the motor to start with excessive current and damage the motor. Summary of the Invention

[0003] The purpose of this invention is to provide a centrifugal switch for reversing the motor in a garbage disposal unit that can effectively reduce motor jamming and extend the motor's service life.

[0004] To achieve the above objectives, this utility model provides a forward and reverse centrifugal switch for a garbage disposer, comprising a centrifuge mounted on a motor shaft and a switch capable of contacting the centrifuge. The switch consists of a junction box body, microswitches A, B, C, and D, a reversing rod, a return spring, and a reversing cam. Microswitches A and C are stacked on one side of the junction box body, and microswitches B and D are stacked on the other side. A reversing cam is installed between switch C and microswitches B and D. The lower end of the reversing cam is connected to the lower end of the reversing rod located outside the wire box body through a short shaft. This allows the upper part of the reversing cam to contact and press against microswitches A and C respectively when the reversing cam rotates, and the middle part of the reversing cam to contact and press against microswitches B and D respectively. The reversing cam is also connected to the bottom plate of the wire box body through a return spring. The short shaft is connected to the bottom plate of the wire box body through a support and a positioning seat. The upper end of the reversing rod contacts the lifting plate on the centrifuge.

[0005] The lower end of the commutator rod, which is located outside the junction box body, is connected to the lower end of the commutator cam in a U-shape via a short shaft. The center line of the commutator rod, the center line of the short shaft, and the center line of the commutator cam form a U-shape and are all in the same axial plane.

[0006] The reversing cam is placed inside the reset spring already set on the wire box body, and the reversing cam is set in a fan shape. On the top two sides of the fan-shaped reversing cam, protrusions A and B are respectively provided and are staggered. Protrusions A, B and the reversing cam form an S shape on the horizontal plane. On the middle two sides of the fan-shaped reversing cam, protrusions C and D are respectively provided and are staggered. Protrusions C, D and the reversing cam form an inverse S shape on the horizontal plane. The top protrusion A and the middle protrusion D on one side of the fan-shaped reversing cam are also staggered on the vertical plane. The top protrusion B and the middle protrusion C on the other side of the fan-shaped reversing cam are also staggered on the vertical plane.

[0007] The reset spring is configured in a V-shape.

[0008] The junction box body consists of an upper plate, three connecting rods, four positioning posts, and a bottom plate. The upper ends of the three connecting rods are connected to the bottom surface of the upper plate and form an isosceles triangle shape. The upper ends of the four positioning posts are also connected to the bottom surface of the upper plate and form an isosceles trapezoid shape. Two of the positioning posts are located on both sides of the connecting rod at the vertex of the isosceles triangle shape to facilitate the installation of microswitches A, B, C, and D. The lower ends of the three connecting rods are connected to the bottom plate, and the lower ends of the four positioning posts are movably connected to the bottom plate.

[0009] The base plate has four blind holes arranged in a trapezoidal shape on its upper surface, into which the lower ends of four positioning pins can be inserted. The base plate also has three rectangular grooves arranged in an isosceles triangular shape, into which the lower ends of three connecting rods can be inserted and locked. The base plate also has a groove for mounting a support and a positioning seat for placing a short shaft, with one end of the positioning seat connected to the end face of the base plate in a cantilever shape. The base plate is also provided with a s-shaped groove for mounting a V-shaped return spring on its lower surface near the support.

[0010] The support is configured in a T-shape, with its two legs able to connect to the grooves on the base plate. A blind hole is provided on one end face of the support near the return spring, allowing the short shaft to be installed, and this end extends into part of the return spring, so that the lower part of this end can press against the return spring.

[0011] The positioning seat is configured as a V-shaped structure that can limit the swing angle of the reversing rod. A platform is provided at the bottom of the V-shaped structure, and a semi-circular groove for installing a short shaft is provided on the platform. A semi-circular groove for limiting the axial movement of the short shaft is also provided in the semi-circular groove, and the center line of the V-shaped structure coincides with the center line of the reversing rod.

[0012] A positioning shoulder is provided on the short shaft near the reversing rod, which can mate with the semi-circular groove on the positioning seat.

[0013] The contacts of microswitches A, B, C, and D are positioned facing the reversing cam, such that the contact of microswitch A corresponds to the top protrusion A of the reversing cam, the contact of microswitch B corresponds to the top protrusion B of the reversing cam, the contact of microswitch C corresponds to the middle protrusion C of the reversing cam, and the contact of microswitch D corresponds to the middle protrusion D of the reversing cam. This arrangement facilitates that when the reversing cam turns right, protrusion B presses against the contact of microswitch B and protrusion C press against the contact of microswitch C, and when the reversing cam turns left, protrusion A presses against the contact of microswitch A and protrusion D press against the contact of microswitch D.

[0014] With this structure, microswitches A and C are stacked on one side of the wire box body, and microswitches B and D are stacked on the other side. A reversing cam is installed between microswitches A and C and microswitches B and D. The lower end of the reversing cam is connected to the lower end of the reversing rod located outside the wire box body via a short shaft. This allows the upper part of the reversing cam to contact and press microswitches A and C respectively, and the middle part to contact and press microswitches B and D respectively when the reversing cam rotates. The reversing cam is also connected to the bottom plate of the wire box body via a return spring, and the short shaft is connected to the bottom plate of the wire box body via a support and a positioning seat. The upper end of the reversing rod contacts the lifting plate on the centrifuge. This effectively reduces motor jamming and extends the motor's service life. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0016] Appendix Figure 1 This is a three-dimensional schematic diagram of a forward and reverse centrifugal switch for a garbage disposer according to this utility model.

[0017] Appendix Figure 2 It is attached Figure 1 A three-dimensional diagram from another direction.

[0018] Appendix Figure 3 This is a three-dimensional schematic diagram of a centrifugal reversing switch cam for a garbage disposer according to this utility model.

[0019] Appendix Figure 4 It is attached Figure 3 A stereoscopic view from another direction.

[0020] Appendix Figure 5 This is an exploded three-dimensional schematic diagram of the reversing cam and base plate of a garbage disposer with forward and reverse centrifugal switch according to the present invention.

[0021] Appendix Figure 6 This is a three-dimensional schematic diagram of the connection between the upper plate of the forward and reverse centrifugal switch of a garbage disposer and three connecting rods and four positioning columns.

[0022] Appendix Figure 7 This is a three-dimensional schematic diagram of the base plate of the forward and reverse centrifugal switch for a garbage disposer according to this utility model.

[0023] In the diagram: 1. Reversing rod 2. Junction box body 3. Upper plate 4. Micro switch A 5. Micro switch C 6. Base plate 7. Micro switch B 8. Micro switch D 9. Positioning seat 10. Centrifuge 11. Connecting rod 12. Reversing cam 13. Return spring 14. Short shaft 15. Protrusion B 16. Protrusion A 17. Protrusion C 18. Protrusion D 19. Shoulder 20. Support 21. Positioning post. Detailed Implementation

[0024] Appendix Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 4 The present invention discloses a forward and reverse centrifugal switch for a garbage disposal unit, comprising a centrifuge 10 mounted on a motor shaft and a switch capable of contacting the centrifuge 10. The switch consists of a junction box body 2, microswitches A4, B7, C5, and D8, a reversing rod 1, a return spring 13, and a reversing cam 12. Microswitches A4 and C5 are stacked on one side of the junction box body 2, and microswitches B7 and D8 are stacked on the other side. The reversing cam 12 is installed between microswitches A4 and C5 and microswitches B7 and D8. The lower end of the reversing cam 12 is connected to the junction box body via a short shaft 14. The lower end of the reversing rod 1 outside the 2 is connected to facilitate the upper part of the reversing cam 12 to contact and press against micro switches A4 and C5 respectively when the reversing cam 12 rotates, and the middle part of the reversing cam 12 to contact and press against micro switches B7 and D8 respectively. The reversing cam 12 is also connected to the bottom plate 6 of the wire box body 2 through the return spring 13. The short shaft 14 is connected to the bottom plate 6 of the wire box body 2 through the support 20 and the positioning seat 9. The upper end of the reversing rod 1 contacts the lifting plate on the centrifuge 10. The lower end of the reversing rod 1 outside the wire box body 2 is connected to the lower end of the reversing cam 12 through the short shaft 14 to form a U-shape. The center line of the reversing rod 1, the center line of the short shaft 14 and the center line of the reversing cam 12 form a U-shape and are in the same axial plane.

[0025] Appendix Figure 3 and attached Figure 4As shown, the reversing cam 12 is placed inside the return spring 13 already set on the wire box body 2, and the reversing cam 12 is set in a fan shape. Protrusions A16 and B15 are respectively provided on the top two sides of the fan-shaped reversing cam 12 and are arranged in a staggered manner. Protrusions A16, B15, and the reversing cam 12 form an S-shape on the horizontal plane. Protrusions C17 and D18 are respectively provided on the two sides of the middle part of the fan-shaped reversing cam 12 and are arranged in a staggered manner. Protrusions C17, B15, and D18 form an S-shape on the horizontal plane. The protrusion D18 and the reversing cam 12 are in an inverted S-shape on the horizontal plane, so that the top protrusion A16 and the middle protrusion D18 on one side of the fan-shaped reversing cam 12 are also misaligned on the vertical plane, and the top protrusion B15 and the middle protrusion C17 on the other side of the fan-shaped reversing cam 12 are also misaligned on the vertical plane. This ensures that there is a micro switch on both sides when it is working, so that the reversing cam 12 is subjected to force evenly and is not prone to deformation and jamming of the short shaft 14.

[0026] Appendix Figure 5 The reset spring 13 is configured in a V-shape as shown.

[0027] Appendix Figure 1 Appendix Figure 2 Appendix Figure 6 and attached Figure 7The junction box body 2 shown is composed of an upper plate 3, three connecting rods 11, four positioning posts 21, and a base plate 6. The upper ends of the three connecting rods 11 are connected to the bottom surface of the upper plate 3 and form an isosceles triangle shape. The upper ends of the four positioning posts 21 are also connected to the bottom surface of the upper plate 3 and form an isosceles trapezoid shape. Two of the positioning posts 21 are located on both sides of the apex of the isosceles triangle connecting rod 11 to facilitate the installation of microswitches A4, B7, C5, and D8. The lower ends of the three connecting rods 11 are connected to the base plate 6, and the lower ends of the four positioning posts 21 are movably connected to the base plate 6. Four positioning posts 21 are arranged in a trapezoidal shape on the upper surface of the base plate 6 to hold the four positioning posts 21 in place. The base plate 6 has three rectangular grooves arranged in an isosceles triangle shape to hold the lower ends of the three connecting rods 11. A groove for mounting the support 20 is also provided on the base plate 6. A positioning seat 9 for placing the short shaft 14 is also provided on the base plate 6, with one end of the positioning seat 9 connected to the end face of the base plate 6 in a cantilever shape. A shaped groove for mounting a V-shaped return spring 13 is also provided on the base plate 6 directly below the short shaft 14 and near the support 20. The support 20 is shaped like a "Z" character, with its two legs connecting to the grooves on the base plate 6. A groove for mounting a V-shaped return spring 13 is provided on one end face of the support 20 near the return spring 13. A blind hole is provided for the short shaft 14, and this end extends into a portion of the return spring 13, so that the lower part of this end can press against the return spring 13; the positioning seat 9 is configured as a V-shaped structure that can limit the swing angle of the reversing rod 1, and a platform is provided at the bottom of the V-shaped structure. A semi-circular groove for installing the short shaft 14 is provided on the platform, and a semi-circular groove for limiting the axial movement of the short shaft 14 is also provided in the semi-circular groove, and the center line of the V-shaped structure coincides with the center line of the reversing rod 1; a positioning shoulder 19 is provided on the short shaft 14 near the reversing rod 1, which can cooperate with the semi-circular groove on the positioning seat 9; the micro switch A4, micro switch B7, micro switch C5 and micro The contacts on the micro switch D8 are positioned facing the reversing cam 12, so that the contacts on the micro switch A4 correspond to the top protrusion A16 of the reversing cam 12, the contacts on the micro switch B7 correspond to the top protrusion B15 of the reversing cam 12, the contacts on the micro switch C5 correspond to the middle protrusion C17 of the reversing cam 12, and the contacts on the micro switch D8 correspond to the middle protrusion D18 of the reversing cam 12. This allows the protrusion B15 to press the contacts of micro switches B7 and C17 to press the contacts of micro switches C5 when the reversing cam 12 turns to the right, and the protrusion A16 to press the contacts of micro switches A4 and D18 to press the contacts of micro switches D8 when the reversing cam 12 turns to the left.

[0028] During operation, when the garbage disposal motor stops rotating forward, the centrifuge 10 lifting plate descends and presses against the upper end of the reversing rod 1, rubbing and pressing the reversing rod 1 to the right. This forces the reversing rod 1 to rotate to the right, causing the reversing cam 12 to rotate to the right, triggering microswitches B7 and C5 and activating the motor's reverse winding. When the motor restarts, it reverses. At a certain speed, under centrifugal force, the centrifuge 10 lifting plate rises, and the return spring 13 resets the reversing cam 12 and disconnects the starting winding. When the reverse rotation stops, the centrifuge 10 lifting plate descends and presses against the upper end of the reversing rod 1, rubbing and pressing the reversing rod 1 to the left. This forces the reversing rod 1 to rotate to the left, causing the reversing cam 12 to rotate to the left, triggering microswitches A4 and D8 and activating the motor's forward winding. This cycle repeats.

Claims

1. A centrifugal switch for reversing rotation in a garbage disposal unit, comprising a centrifuge mounted on a motor shaft and a switch capable of contacting the centrifuge, characterized in that: The switch consists of a junction box body (2), micro switches A (4), B (7), C (5), D (8), a reversing rod (1), a return spring (13), and a reversing cam (12). Micro switches A (4) and C (5) are stacked on one side of the junction box body (2), and micro switches B (7) and D (8) are stacked on the other side of the junction box body (2). A reversing cam (12) is installed between micro switches A (4), C (5) and B (7), D (8). The lower end of the reversing cam (12) passes through... The short shaft (14) is connected to the lower end of the reversing rod (1) located outside the wire box body (2), so that when the reversing cam (12) rotates, the upper part of the reversing cam (12) can contact and squeeze the micro switch A (4) and the micro switch C (5) respectively, and the middle part of the reversing cam (12) can contact and squeeze the micro switch B (7) and the micro switch D (8) respectively. The reversing cam (12) is also connected to the bottom plate (6) of the wire box body (2) through the return spring (13). The short shaft (14) is connected to the bottom plate (6) of the wire box body (2) through the support (20) and the positioning seat (9). The upper end of the reversing rod (1) contacts the lifting plate on the centrifuge (10).

2. A reverse rotation centrifugal switch for garbage disposals as defined in claim 1 wherein: The lower end of the reversing rod (1), which is located outside the wire box body (2), is connected to the lower end of the reversing cam (12) in a U-shape via a short shaft (14). The center line of the reversing rod (1), the center line of the short shaft (14), and the center line of the reversing cam (12) form a U-shape and are in the same axial plane.

3. A forward-reverse centrifugal switch for a garbage disposer as defined in claim 1, wherein: The reversing cam (12) is placed inside the reset spring (13) already set on the wire box body (2), and the reversing cam (12) is set into a fan shape. On the top two sides of the fan-shaped reversing cam (12), protrusions A (16) and B (15) are respectively provided and are arranged in a staggered manner. The protrusions A (16), B (15) and the reversing cam (12) are S-shaped on the horizontal plane. On the two sides of the middle part of the fan-shaped reversing cam (12), protrusions A (16), B (15) and B (15) are respectively provided. The protrusions C (17) and D (08) are staggered. The protrusions C (17), D (18) and the reversing cam (12) are in an inverted S shape on the horizontal plane. The top protrusion A (16) and the middle protrusion D (18) on one side of the fan-shaped reversing cam (12) are also staggered on the vertical plane. The top protrusion B (15) and the middle protrusion C (17) on the other side of the fan-shaped reversing cam (12) are also staggered on the vertical plane.

4. A forward-reverse centrifugal switch for a garbage disposer according to claim 1 or 3, wherein: The reset spring (13) is configured in a V-shape.

5. A forward-reverse centrifugal switch for a garbage disposer as defined in claim 1, wherein: The main body (2) of the wire box is composed of an upper plate (3), three connecting rods (11), four positioning posts (21), and a bottom plate (6). The upper ends of the three connecting rods (11) are connected to the bottom surface of the upper plate (3) and are in the shape of an isosceles triangle. The upper ends of the four positioning posts (21) are also connected to the bottom surface of the upper plate (3) and are in the shape of an isosceles trapezoid. Two of the positioning posts (21) are set on both sides of the connecting rods (11) at the apex of the isosceles triangle, which facilitates the installation of micro switches A (4), B (7), C (5), and D (8). The lower ends of the three connecting rods (11) are connected to the bottom plate (6), and the lower ends of the four positioning posts (21) are movably connected to the bottom plate (6).

6. A forward / reverse centrifugal switch for a garbage disposer according to claim 1 or 5, characterized in that: Four blind holes arranged in a trapezoidal shape are provided on the upper surface of the base plate (6) to insert the lower ends of four positioning pins (21). Three rectangular grooves arranged in an isosceles triangle shape are provided on the base plate (6) to insert and lock the lower ends of three connecting rods (11). A groove for installing a support (20) is provided on the base plate (6). A positioning seat (9) for placing a short shaft (14) is provided on the base plate (6), so that one end of the positioning seat (9) is connected to the end face of the base plate (6) and is cantilevered. A s-shaped groove for installing a V-shaped return spring (13) is also provided on the base plate (6) directly below the short shaft (14) and near the support (20).

7. A forward-reverse centrifugal switch for a garbage disposer as defined in claim 1, wherein: The support (20) is set in a T-shape. The two legs of the T-shaped support (20) can be connected to the groove on the base plate (6). A blind hole is provided on one end face of the support (20) near the return spring (13) to install the short shaft (14), and the end extends into part of the return spring (13) so that the lower part of the end can press the return spring (13).

8. A forward-reverse centrifugal switch for a garbage disposer as defined in claim 1, wherein: The positioning seat (9) is configured as a V-shaped structure that can limit the swing angle of the reversing rod (1). A platform is provided at the bottom of the V-shaped structure, and a semi-circular groove for installing the short shaft (14) is provided on the platform. A semi-circular groove for limiting the axial movement of the short shaft (14) is also provided in the semi-circular groove, and the center line of the V-shaped structure coincides with the center line of the reversing rod (1).

9. A forward-reverse centrifugal switch for a garbage disposer as defined in claim 1, wherein: A positioning shoulder (19) is provided on the short shaft (14) near the reversing rod (1) to engage with the semi-circular groove on the positioning seat (9).

10. A forward-reverse centrifugal switch for a garbage disposer as defined in claim 1, wherein: The contacts of microswitches A (4), B (7), C (5), and D (8) are positioned facing the reversing cam (12), such that the contact on microswitch A (4) corresponds to the top protrusion A (16) of the reversing cam (12), the contact on microswitch B (7) corresponds to the top protrusion B (15) of the reversing cam (12), and the contact on microswitch C (5) corresponds to the middle protrusion C (16) of the reversing cam (12). 17) Correspondingly, the contacts on the micro switch D (8) correspond to the protrusion D (18) in the middle of the reversing cam (12), so that when the reversing cam (12) turns to the right, the protrusion B (15) presses the contact of the micro switch B (7) and the protrusion C (17) presses the contact of the micro switch C (5), so that when the reversing cam (12) turns to the left, the protrusion A (16) presses the contact of the micro switch A (4) and the protrusion D (18) presses the contact of the micro switch D (8).

Images