A motor centrifugal switch

Abstract

The present invention discloses a motor centrifugal switch, comprising a positioning base and a positioning sleeve, wherein a contact bracket body is fixedly connected between the two ends of the positioning base, a moving contact is fixedly connected to the middle part of the contact bracket body, the top and bottom of the inner side of the positioning base near one end of the moving contact are fixedly connected to fixed contacts matching the moving contact, a linear slide is fixedly connected to the outer side of the positioning sleeve, and a pressure plate is slidably connected to the outer sides of the linear slides at the same end, centrifugal components are provided at both ends of the top of the positioning sleeve, and reset components are provided on both sides of the top of the positioning sleeve, the reset component is used to support the position of the centrifugal component, the centrifugal component includes a central shaft, a centrifugal plate, a counterweight, a through slot A, a linkage plate, a guide plate and a support shaft. The present invention relates to the technical field of centrifugal switches; the present invention can ensure the connection stability of each component while also being able to conveniently disassemble and assemble it through the overall structural coordination, so as to facilitate later maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal switches, in particular to a motor centrifugal switch. Background Art

[0002] A motor centrifugal switch is a reversible switch used to control the start and stop, forward and reverse rotation, and speed of a motor. It is widely used in industrial production. The motor centrifugal switch mainly controls the motor through sensors and contacts (or actuators). When the load changes, the motor will generate corresponding centrifugal acceleration, which will cause the sensor to shift. Under the action of the displacement, the contacts will change their contact state, thereby achieving on-off control of the circuit.

[0003] However, after the motor centrifugal switch in traditional technology is installed, it is difficult to conveniently disassemble and assemble the components, which makes subsequent maintenance inconvenient, and the extreme support of the centrifugal force is difficult to effectively adjust, resulting in poor overall applicability.

[0004] To this end, the present invention provides a motor centrifugal switch to solve the above problems. Summary of the Invention

[0005] In response to the deficiencies of the prior art, the present invention provides a motor centrifugal switch, which solves the problem that the above-mentioned components are difficult to disassemble and assemble, resulting in inconvenience in subsequent maintenance, and the centrifugal force limit support is difficult to effectively adjust, resulting in poor overall applicability.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a motor centrifugal switch, including a positioning base and a positioning sleeve, a contact bracket body fixedly connected between the two ends of the positioning base, a moving contact fixedly connected to the middle of the contact bracket body, the top and bottom of the inner side of the positioning base close to the moving contact end are fixedly connected with fixed contacts matching the moving contact, a linear slide is fixedly connected to the outer side of the positioning sleeve, and a pressure plate is slidably connected to the outer sides of the linear slide at the same end, centrifugal components are provided at both ends of the top of the positioning sleeve, and reset components are provided on both sides of the top of the positioning sleeve, and the reset component is used to support the position of the centrifugal component.

[0007] Preferably, the centrifugal assembly includes a central shaft, a centrifugal plate, a counterweight, a through slot A, a linkage plate, a guide plate and a support shaft, the two ends of the top of the positioning sleeve are fixedly connected to the centrifugal seat, the middle of the centrifugal seat is rotatably connected to the central shaft, the two ends of the central shaft are fixedly connected to the centrifugal plate, and a counterweight is fixedly connected between the two centrifugal plates at one end away from the central shaft, and the centrifugal plate is provided with a through slot A in the middle of the centrifugal plate, the bottom end of the through slot A is obliquely fixedly connected to the linkage plate, the linkage plate is rotatably connected to the guide plate, and the guide plate is fixedly connected to the support shaft at one end away from the linkage plate, the two ends of the top of the pressure plate are fixedly connected to the assembly seat A, the top of the assembly seat A is fixedly connected to the deformation ring, and the support shaft is also rotatably connected to the inner side of the deformation ring, one end of the deformation ring is provided with a notch, and guide inclined plates are obliquely provided above and below the notch, and an avoidance hole is provided at one end of the deformation ring close to the guide inclined plate.

[0008] Preferably, the reset assembly includes an extension seat, a displacement slide rod, an assembly seat B, a linkage rod, a limit box, a coil spring and a displacement frame, both sides of the top of the positioning sleeve are fixedly connected to the extension seat, both ends of the extension seat are slidably connected to two displacement slide rods, one end of the two displacement slide rods at the same end is fixedly connected to the assembly seat B, one end of the assembly seat B is fixedly connected to the linkage rod, and the linkage rod is also movably connected to the corresponding through slot A, and the two displacement slide rods at the same end are also slidably connected to the limit box, a coil spring is also provided between one side of the limit box and the inner wall of the extension seat, and the coil spring is located on the outside of the displacement slide rod, the middle part of the limit box is slidably connected to the displacement frame, the top and bottom ends of the displacement frame are fixedly connected to the guide rod, and the top and bottom ends of the limit box are rotatably connected to the transmission ring.

[0009] Preferably, the reset assembly also includes an adjusting plate, a through slot B, a positioning shaft, a locking cylinder, a transmission rod and a through slot C. The transmission ring is fixedly connected to the adjusting plate on one side close to the displacement frame, a through slot B is provided in the middle of the adjusting plate, and the two guide rods are movably connected to the inside of the two through slots B respectively, the inner wall of the bottom end of the top of the limit box is fixedly connected to a plurality of positioning shafts, one end of each of the positioning shafts is slidably connected to a locking cylinder, and the locking cylinder is clamped and connected to the displacement slide bar, the bottom end of the locking cylinder is fixedly connected to the transmission rod, the edge of one side of the transmission ring is provided with a through slot C corresponding to the transmission rod one by one, and the bottom end of the transmission rod is also movably connected to the corresponding through slot C, the middle part of the limit box is rotatably connected to the transmission screw, and the displacement frame is also threadedly connected to the outside of the transmission screw.

[0010] By adopting the above technical solution, the controllable displacement of the limit box can be used to adjust the centrifugal force limit value of the centrifugal plate to meet different motor transmission needs, greatly improving the overall applicability.

[0011] Preferably, through holes are provided at both ends of the positioning base, and the middle portion of the contact bracket body is arched and bent upward.

[0012] By adopting the above technical solution, external connecting parts can be avoided, so that the positioning base can be easily assembled on the motor.

[0013] Preferably, a linear slide groove adapted to the linear slide bar is provided on the inner side of the pressure plate, and the pressure plate is connected to the outer side through the linear slide groove.

[0014] By adopting the above technical solution and utilizing the setting of the linear slide, the pressure plate can be stably connected to the linear slide, and the cross-sectional shape of the linear slide is an "I" shape, and the cross-sectional shape of the linear slide is also an "I" shape.

[0015] Preferably, the top and bottom ends of the limit box are fixedly connected to a stabilizing ring, and the displacement slide rod is also slidably connected to the inner side of the stabilizing ring. A circular hole corresponding to the locking cylinder is opened on the stabilizing ring, and the diameter of the circular hole is larger than the diameter of the locking cylinder.

[0016] By adopting the above technical solution, the displacement slide bar can be auxiliary supported to ensure the stability when the limit box is connected to the displacement slide bar, and the setting of the circular hole allows the transmission rod to pass through the circular hole and engage with the displacement slide bar.

[0017] Preferably, a polished rod is transversely fixedly connected to the middle of the limit box, a threaded hole and a through hole are opened in the middle of the displacement frame, the transmission screw is connected to the inside of the threaded hole, and there is a clearance fit between the through hole and the polished rod.

[0018] By adopting the above technical solution, the displacement frame can be driven to perform stable displacement under the limitation of the polished rod.

[0019] Preferably, the through groove C is an arc-shaped structure, and one end of the transmission rod located inside the through groove C is fixedly connected to a wear-resistant layer.

[0020] By adopting the above technical solution, during the rotation of the transmission ring, the transmission rod can be pushed to move along the through groove C, and the connection between the transmission rod and the locking cylinder can be coordinated to drive the locking cylinder to slide under the limit of the positioning shaft.

[0021] Preferably, a force knob is rotatably connected to the middle of one side of the limit box, and one end of the force knob located inside the limit box is fixedly connected to the transmission screw, and a transmission groove is opened in the middle of the force knob.

[0022] By adopting the above technical solution, the transmission screw can be rotated from the outside of the limit box, thereby ensuring the transmission efficiency of the transmission screw, and in conjunction with the setting of the transmission groove, it can be assembled with the external transmission parts.

[0023] Beneficial effects

[0024] The present invention provides a centrifugal switch for a motor. Compared with the prior art, it has the following advantages:

[0025] The motor centrifugal switch, through the overall structural coordination, can ensure the connection stability of each component while also being able to be easily disassembled and assembled for easy later maintenance.

[0026] The motor centrifugal switch, through the structural coordination of the reset assembly, can utilize the controllable displacement of the limit box to adjust the centrifugal force limit value of the centrifugal plate to meet different motor transmission needs, greatly improving the overall applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the connection between the positioning base and the contact bracket body of the present invention;

[0029] Figure 3 Schematic diagram of the separation structure of the linear slide and the pressure plate of the present invention;

[0030] Figure 4 is a schematic diagram of a centrifugal assembly of the present invention;

[0031] Figure 5 This is a schematic diagram of the connection structure between the deformation ring and the guide inclined plate of the present invention;

[0032] Figure 6 This is a schematic diagram of the connection structure of the centrifugal plate and the linkage plate of the present invention;

[0033] Figure 7 is a schematic diagram of a reset assembly of the present invention;

[0034] Figure 8 Schematic diagram of the separation structure of the displacement slide bar and the limit box of the present invention;

[0035] Figure 9 Schematic diagram of the internal structure of the limit box of the present invention;

[0036] Figure 10It is a schematic diagram of the internal structure of the locking cylinder of the present invention.

[0037] In the figure, 1. positioning base; 2. positioning sleeve; 3. contact bracket body; 4. moving contact; 5. fixed contact; 6. linear slide; 7. pressure plate; 8. centrifugal assembly; 9. reset assembly; 10. central shaft; 11. centrifugal plate; 12. counterweight; 13. through slot A; 14. linkage plate; 15. guide plate; 16. support shaft; 17. assembly seat A; 18. deformation ring; 19. guide inclined plate; 20. avoidance hole; 21. extension seat; 22. displacement slide; 23. assembly seat B; 24. linkage rod; 25. limit box; 26. coil spring; 27. displacement frame; 28. guide rod; 29. transmission ring; 30. adjustment plate; 31. through slot B; 32. positioning shaft; 33. locking cylinder; 34. transmission rod; 35. through slot C; 36. transmission screw. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Example 1:

[0040] See also Figure 1-10 , a motor centrifugal switch includes a positioning base 1 and a positioning sleeve 2, a contact bracket body 3 is fixedly connected between the two ends of the positioning base 1, a moving contact 4 is fixedly connected to the middle of the contact bracket body 3, the top and bottom of the inner side of the positioning base 1 near the moving contact 4 are fixedly connected with fixed contacts 5 that cooperate with the moving contact 4, a linear slide 6 is fixedly connected to the outside of the positioning sleeve 2, and a pressure plate 7 is slidably connected to the outside of the linear slide 6 at the same end, centrifugal components 8 are provided at both ends of the top of the positioning sleeve 2, and reset components 9 are provided on both sides of the top of the positioning sleeve 2. The reset component 9 is used to support the position of the centrifugal component 8;

[0041] Here, in this embodiment, the positioning sleeve 2 is installed on the output shaft of the motor in an interference fit manner. In other embodiments, the positioning sleeve 2 and the output shaft of the motor can also be connected by a key connection or other connections.

[0042] In this embodiment, the contact bracket body 3 is made of copper. Copper is a metal element and also a transition element. It has good ductility, high thermal conductivity and electrical conductivity, and can be recycled multiple times without damaging its mechanical properties. It is also relatively inexpensive, effectively reducing the overall cost of use.

[0043] In other embodiments, the material of the contact bracket body 3 may also be:

[0044] Stainless steel, stainless steel has good corrosion resistance and high temperature stability;

[0045] Ceramics, ceramics have good insulation properties and high temperature resistance;

[0046] More specifically, in this embodiment, the outer surface of the contact bracket body 3 is coated with a tin oxide coating. This coating consists of a layer of evenly distributed tin oxide particles covering the surface of the contact elastic sheet, and has excellent wear resistance, corrosion resistance, and dust resistance. In addition, the tin oxide coating also has good electrical and thermal conductivity.

[0047] In other embodiments, a zirconium oxide coating may be applied: zirconium oxide is a high-hardness ceramic coating with excellent wear resistance, high temperature resistance and corrosion resistance, and it can effectively protect the contact bracket body 3 from the influence of harsh environments;

[0048] Metal powder coating: Metal powder coating uses spraying technology to evenly cover the surface of the contact bracket body 3 with metal powder. This coating has good electrical and thermal conductivity, as well as strong mechanical strength.

[0049] Polyurethane coating: Polyurethane coating is a soft and elastic material that can effectively isolate direct contact between contacts and the external environment. This coating has good wear resistance, corrosion resistance and tensile strength;

[0050] Preferably, through holes are provided at both ends of the positioning base 1, and the middle portion of the contact bracket body 3 is arched and bent upward. By opening the through holes, external connectors can be avoided, so that the positioning base 1 can be easily assembled on the motor;

[0051] Here, the movable contact 4 and the fixed contact 5 are both mature existing technologies and will not be described in detail here;

[0052] Furthermore, a linear slide groove adapted to the linear slide bar 6 is provided on the inner side of the pressure plate 7, and the pressure plate 7 is connected to the outer side through the linear slide groove. By setting the linear slide groove, the pressure plate 7 can be stably connected to the linear slide bar 6. In this embodiment, the cross-sectional shape of the linear slide bar 6 is an "I" shape. Accordingly, in this embodiment, the cross-sectional shape of the linear slide groove is also an "I" shape. In other embodiments, it can also be other shapes.

[0053] The centrifugal assembly 8 includes a central shaft 10, a centrifugal plate 11, a counterweight 12, a through slot A13, a linkage plate 14, a guide plate 15 and a support shaft 16. Both ends of the top of the positioning sleeve 2 are fixedly connected to the centrifugal seat, the middle of the centrifugal seat is rotatably connected to the central shaft 10, both ends of the central shaft 10 are fixedly connected to the centrifugal plates 11, and a counterweight 12 is fixedly connected between the ends of the two centrifugal plates 11 away from the central shaft 10. A through slot A13 is opened in the middle of the centrifugal plate 11, and the bottom end of the through slot A13 is fixedly connected to the linkage plate 1 4. The end of the linkage plate 14 away from the through groove A13 is rotatably connected to the guide plate 15, and the end of the guide plate 15 away from the linkage plate 14 is fixedly connected to the support shaft 16. Both ends of the top of the pressure plate 7 are fixedly connected to the assembly seat A17, and the top of the assembly seat A17 is fixedly connected to the deformable ring 18, and the support shaft 16 is also rotatably connected to the inner side of the deformable ring 18. A notch is provided at one end of the deformable ring 18, and guide ramps 19 are obliquely provided above and below the notch. An avoidance hole 20 is provided at the end of the deformable ring 18 close to the guide ramp 19;

[0054] It can be understood that when the output shaft of the motor rotates too fast, centrifugal force will be generated at the centrifugal plate 11, driving the centrifugal plate 11 to rotate under the support of the central shaft 10, and under the connection between the centrifugal plate 11 and the linkage plate 14, the linkage plate 14 is driven to flip upward. Since the guide plate 15 is connected between the linkage plate 14 and the pressure plate 7 by the support shaft 16, when the linkage plate 14 flips upward, the guide plate 15 can be used to pull the pressure plate 7, prompting the pressure plate 7 to move away from the contact bracket body 3 under the limit of the linear slide 6, so that the contact bracket body 3 can be reset, and the operation of the motor can be stopped;

[0055] The guide plate 15 can also be rotated to force the support shaft 16 to reach between the two guide inclined plates 19. As the guide plate 15 continues to rotate, the guide inclined plates 19 will be squeezed by the support shaft 16, causing the gap on the deformation ring 18 to become larger until the support shaft 16 can pass through. When the support shaft 16 enters the deformation ring 18, the pressure plate 7 can be installed. At the same time, the external connecting piece is passed through the avoidance hole 20 and locked to prevent the deformation ring 18 from uncontrollable deformation.

[0056] Here, the material of the deformable ring 18 is a deformable plastic, which is a plastic that undergoes a reversible shape change by heating, cooling, pressure or other methods. This plastic has excellent plasticity and adaptability, and can effectively increase the service life of the deformable ring 18;

[0057] In other embodiments, the material of the deformable ring 18 can also be polyurethane: polyurethane is a polymer material formed by the condensation reaction of polyols and polyisocyanates and has excellent mechanical properties. It has strong plasticity and better stability, chemical resistance, resilience and mechanical properties, which can effectively improve the service life of the deformable ring 18.

[0058] Example 2:

[0059] See also Figure 1-10 , this embodiment provides a technical solution based on the first embodiment: the reset assembly 9 includes an extension seat 21, a displacement slide 22, an assembly seat B23, a linkage rod 24, a limit box 25, a coil spring 26 and a displacement frame 27, both sides of the top of the positioning sleeve 2 are fixedly connected to the extension seat 21, both ends of the extension seat 21 are slidably connected to two displacement slides 22, one end of the two displacement slides 22 at the same end is fixedly connected to the assembly seat B23, and one end of the assembly seat B23 is fixedly connected to the linkage rod 24, and the linkage rod 24 is also movably connected to the corresponding through slot A13. A limit box 25 is also slidably connected between the two displacement slide bars 22 at the same end. A coil spring 26 is further provided between one side of the limit box 25 and the inner wall of the extension seat 21, and the coil spring 26 is located on the outside of the displacement slide bar 22. A displacement frame 27 is slidably connected to the middle part of the limit box 25. The top and bottom ends of the displacement frame 27 are fixedly connected to the guide rod 28. The top and bottom ends of the limit box 25 are rotatably connected to the transmission ring 29.

[0060] The locking cylinder 33 is connected to the displacement slide 22, and the bottom end of the locking cylinder 33 is fixedly connected to the transmission rod 34. The edge of one side of the transmission ring 29 is provided with a through slot C35 corresponding to the transmission rod 34, and the bottom end of the transmission rod 34 is also movably connected to the corresponding through slot C35. The middle part of the limit box 25 is rotatably connected to the transmission screw 36, and the displacement frame 27 is also threadedly connected to the outer side of the transmission screw 36.

[0061] When the locking cylinder 33 is released from the locking position, the locking cylinder 33 is released, and the locking cylinder 33 is released, so that the locking cylinder 33 is locked.

[0062] In detail, the top and bottom ends of the limit box 25 are fixedly connected with a stabilizing ring, and the displacement slide bar 22 is also slidably connected to the inner side of the stabilizing ring. A circular hole adapted to the locking cylinder 33 is opened on the stabilizing ring, and the diameter of the circular hole is larger than the diameter of the locking cylinder 33. The setting of the stabilizing ring can provide auxiliary support for the displacement slide bar 22, thereby ensuring the stability of the connection between the limit box 25 and the displacement slide bar 22, and the setting of the circular hole enables the transmission rod 34 to pass through the circular hole and engage with the displacement slide bar 22.

[0063] Preferably, a polished rod is transversely fixedly connected to the middle of the limit box 25, a threaded hole and a through hole are opened in the middle of the displacement frame 27, a transmission screw 36 is connected to the inside of the threaded hole, and a clearance fit is formed between the through hole and the polished rod. Since the transmission screw 36 is connected to the inside of the threaded hole, when the transmission screw 36 rotates, it can drive the displacement frame 27 to perform stable displacement under the limit of the polished rod;

[0064] Preferably, the through groove C35 is an arc-shaped structure, and one end of the transmission rod 34 located inside the through groove C35 is fixedly connected to a wear-resistant layer. By utilizing the structural characteristics of the through groove C35, during the rotation of the transmission ring 29, the transmission rod 34 can be pushed to move along the through groove C35, and the connection between the transmission rod 34 and the locking cylinder 33 can be coordinated to drive the locking cylinder 33 to slide under the limit of the positioning shaft 32.

[0065] In detail, a plurality of locking holes are opened on the outer side of the displacement slide bar 22, and the locking cylinder 33 is snap-connected to the inner side of the locking holes;

[0066] Here, a force knob is rotatably connected to the middle part of one side of the limit box 25, and one end of the force knob located inside the limit box 25 is fixedly connected to the transmission screw 36. A transmission groove is provided in the middle part of the force knob. By utilizing the setting of the force knob, the transmission screw 36 can be rotated from the outside of the limit box 25 to ensure the transmission efficiency of the transmission screw 36, and in conjunction with the setting of the transmission groove, it can be assembled with external transmission parts. In this embodiment, the transmission groove is hexagonal to cooperate with an external hexagonal wrench to conveniently rotate the transmission screw 36.

[0067] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0068] Working principle: first, install the positioning sleeve 2 on the output shaft of the motor in an interference fit manner, install the positioning base 1 inside the motor housing by screws, and make the pressure plate 7 face the contact bracket body 3, then assemble the two pressure plates 7 on the outside of the positioning sleeve 2, and limit them by the linear slide 6, and then rotate the guide plate 15 to prompt the support shaft 16 to reach between the two guide inclined plates 19. As the guide plate 15 continues to rotate, the guide inclined plates 19 will be squeezed by the support shaft 16, causing the gap on the deformation ring 18 to become larger until the support shaft 16 can pass through. When the support shaft 16 enters the deformation ring 18, the installation of the pressure plate 7 can be formed. At the same time, the external connecting piece is passed through the avoidance hole 20 and locked to avoid uncontrollable deformation of the deformation ring 18.

[0069] When the output shaft of the motor rotates too fast, centrifugal force will be generated at the centrifugal plate 11, driving the centrifugal plate 11 to rotate under the support of the central shaft 10, and under the connection between the centrifugal plate 11 and the linkage plate 14, the linkage plate 14 will be driven to flip upward. Since the guide plate 15 is connected between the linkage plate 14 and the pressure plate 7 by the support shaft 16, when the linkage plate 14 flips upward, the guide plate 15 can be used to pull the pressure plate 7, prompting the pressure plate 7 to move away from the contact bracket body 3 under the limit of the linear slide 6, so that the contact bracket body 3 can be reset and the operation of the motor can be stopped;

[0070] When the centrifugal plate 11 rotates, the connection between the through slot A13 and the linkage rod 24 can be coordinated to pull the assembly seat B23 through the through slot A13, prompting the displacement slide bar 22 to drive the limit box 25 to slide, and because the coil spring 26 is located between the limit box 25 and the extension seat 21, when the displacement slide bar 22 slides, it can squeeze the coil spring 26. When the output shaft of the motor rotates at a normal speed, the external force on the coil spring 26 will be reduced, and the coil spring 26 can be used to pull the centrifugal plate 11 to reset, prompting the pressure plate 7 to squeeze the contact bracket body 3 again, so that the contact bracket body 3 drives the moving contact 4 to contact the corresponding fixed contact 5, so that the fixed contact 5 continues to operate;

[0071] When the locking cylinder 33 is released from the locking position, the locking cylinder 33 is released, and the locking cylinder 33 is released, so that the locking cylinder 33 is locked.

[0072] The limit box 25 can be removed from the displacement slide bar 22 to replace the coil spring 26.

[0073] In summary, 1. The motor centrifugal switch, through the overall structural coordination, can ensure the connection stability of each component while also being able to be easily disassembled and assembled for later maintenance.

[0074] 2. The motor centrifugal switch, through the structural coordination of the reset assembly, can utilize the controllable displacement of the limit box to adjust the centrifugal force limit value of the centrifugal plate to meet different motor transmission needs, greatly improving the overall applicability.

[0075] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0076] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A motor centrifugal switch, characterized in that: The invention comprises a positioning base (1) and a positioning sleeve (2), wherein a contact bracket body (3) is fixedly connected between the two ends of the positioning base (1), a moving contact (4) is fixedly connected to the middle of the contact bracket body (3), a fixed contact (5) matching the moving contact (4) is fixedly connected to the top and bottom of one end of the inner side of the positioning base (1) close to the moving contact (4), a linear slide (6) is fixedly connected to the outer side of the positioning sleeve (2), and a pressure plate (7) is slidably connected to the outer side of the linear slide (6) at the same end, a centrifugal assembly (8) is provided at both ends of the top of the positioning sleeve (2), and a reset assembly (9) is provided on both sides of the top of the positioning sleeve (2), and the reset assembly (9) is used to support the position of the centrifugal assembly (8); The centrifugal assembly (8) includes a central shaft (10), a centrifugal plate (11), a counterweight (12), a through slot A (13), a linkage plate (14), a guide plate (15) and a support shaft (16), both ends of the top of the positioning sleeve (2) are fixedly connected to a centrifugal seat, the middle of the centrifugal seat is rotatably connected to the central shaft (10), both ends of the central shaft (10) are fixedly connected to the centrifugal plates (11), a counterweight (12) is fixedly connected between the ends of the two centrifugal plates (11) away from the central shaft (10), a through slot A (13) is opened in the middle of the centrifugal plate (11), and the bottom end of the through slot A (13) is fixedly connected to the linkage plate (15) at an angle. 4), one end of the linkage plate (14) away from the through slot A (13) is rotatably connected to a guide plate (15), one end of the guide plate (15) away from the linkage plate (14) is fixedly connected to a support shaft (16), both ends of the top of the pressure plate (7) are fixedly connected to an assembly seat A (17), the top of the assembly seat A (17) is fixedly connected to a deformable ring (18), and the support shaft (16) is also rotatably connected to the inner side of the deformable ring (18), one end of the deformable ring (18) is provided with a notch, and guide inclined plates (19) are obliquely provided above and below the notch, and an avoidance hole (20) is provided at one end of the deformable ring (18) close to the guide inclined plate (19); The reset assembly (9) includes an extension seat (21), a displacement slide rod (22), an assembly seat B (23), a linkage rod (24), a limit box (25), a coil spring (26) and a displacement frame (27). Both sides of the top of the positioning sleeve (2) are fixedly connected to the extension seat (21). Both ends of the extension seat (21) are slidably connected to two displacement slide rods (22). One end of the two displacement slide rods (22) at the same end is fixedly connected to the assembly seat B (23). One end of the assembly seat B (23) is fixedly connected to the linkage rod (24), and the linkage rod (24) is also movably connected to the inside of the corresponding through slot A (13). The two displacement slide rods (22) at the same end are also slidably connected to the limit box (25). A coil spring (26) is also provided between one side of the limit box (25) and the inner wall of the extension seat (21), and the coil spring (26) is located on the outside of the displacement slide rod (22). When the output shaft of the motor rotates too fast, centrifugal force is generated at the centrifugal plate (11), driving the linkage plate (14) to flip upward, and the guide plate (15) is used to pull the pressure plate (7), causing the pressure plate (7) to move away from the contact bracket body (3), so that the contact bracket body (3) is reset.

2. The motor centrifugal switch according to claim 1, characterized in that: A displacement frame (27) is slidably connected to the middle portion of the interior of the limit box (25), the top and bottom ends of the displacement frame (27) are fixedly connected to guide rods (28), and the top and bottom ends of the limit box (25) are rotatably connected to transmission rings (29).

3. The motor centrifugal switch according to claim 2, characterized in that: The reset assembly (9) further comprises an adjustment plate (30), a through slot B (31), a positioning shaft (32), a locking cylinder (33), a transmission rod (34) and a through slot C (35). The transmission ring (29) is fixedly connected to the adjustment plate (30) on one side close to the displacement frame (27). A through slot B (31) is provided in the middle of the adjustment plate (30), and the two guide rods (28) are movably connected to the inside of the two through slots B (31). The inner wall of the top and bottom ends of the limit box (25) are fixedly connected to a plurality of positioning shafts (32). Each positioning shaft One end of the rod (32) is slidably connected to a locking cylinder (33), and the locking cylinder (33) is snap-connected to the displacement slide rod (22). The bottom end of the locking cylinder (33) is fixedly connected to a transmission rod (34). An edge of one side of the transmission ring (29) is provided with a through groove C (35) corresponding to the transmission rod (34), and the bottom end of the transmission rod (34) is also movably connected to the inside of the corresponding through groove C (35). The middle part of the limit box (25) is rotatably connected to a transmission screw (36), and the displacement frame (27) is also threadedly connected to the outside of the transmission screw (36).

4. The motor centrifugal switch according to claim 1, characterized in that: Through holes are provided at both ends of the positioning base (1), and the middle portion of the contact bracket body (3) is arched and bent upwards.

5. The motor centrifugal switch according to claim 1, characterized in that: A linear slide groove adapted to the linear slide bar (6) is provided on the inner side of the pressure plate (7), and the pressure plate (7) is connected to the outer side via the linear slide groove.

6. The motor centrifugal switch according to claim 3, characterized in that: The top and bottom ends of the limit box (25) are fixedly connected to a stabilizing ring, and the displacement slide rod (22) is also slidably connected to the inner side of the stabilizing ring. The stabilizing ring is provided with a circular hole adapted to the locking cylinder (33), and the diameter of the circular hole is larger than the diameter of the locking cylinder (33).

7. The motor centrifugal switch according to claim 3, characterized in that: A polished rod is fixedly connected to the middle of the limit box (25) in a transverse direction. A threaded hole and a through hole are provided in the middle of the displacement frame (27). The transmission screw (36) is connected to the inside of the threaded hole. There is a clearance fit between the through hole and the polished rod.

8. The motor centrifugal switch according to claim 3, characterized in that: The through slot C (35) is an arc-shaped structure, and one end of the transmission rod (34) located inside the through slot C (35) is fixedly connected to a wear-resistant layer.

9. The motor centrifugal switch according to claim 3, characterized in that: A force knob is rotatably connected to the middle of one side of the limit box (25), and one end of the force knob located inside the limit box (25) is fixedly connected to the transmission screw (36), and a transmission slot is provided in the middle of the force knob.

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