A large torque structure rotary switch

Abstract

The utility model discloses a big torque structure rotary switch, including setting in switch body's rotation handle, contact subassembly and gear structure, gear structure includes the gear wheel of the axial laminated arrangement between the upper cover and base along rotation handle, rotation disc and pressure component, rotation disc is coaxial linkage arrangement with rotation handle, and rotation disc is equipped with at least one group gear slot of the circumferential interval arrangement to gear wheel's one side, and gear wheel is correspondently equipped with at least one group gear tooth of the meshing connection in gear slot, and through pressure component to gear tooth exert the pressure of the axial resistance in gear slot, and this rotary switch is through the axial laminated arrangement, axial pressure, embedded surface engagement and the improvement design of closed limit chamber, has realized the big enhancement of operating moment and torque carrying capacity, has improved overall structure rigidity and strength, has provided very high gear retention force and anti -disengagement ability, can satisfy the structural strength requirement under big torque scene, has promoted product use performance.

Description

Technical Field

[0001] This utility model relates to the field of rotary switch technology, and specifically to a rotary switch with a high torque structure. Background Technology

[0002] A rotary switch is a product used in AC power appliances to implement multi-level function control. Existing small rotary switches require a certain force to switch between levels according to the operation requirements. This force is usually designed to be 0.05-0.15Nm. However, depending on the usage scenario and operation requirements, small rotary switches are now required to provide greater operating force to complete the switching operation and make it connect or disconnect.

[0003] Existing Chinese patent document CN215183669U discloses a rotary gear switch, including a housing, a rotating component, a moving contact, an intermediate terminal, multiple stationary terminals, and an elastic device. The rotating component and the elastic device are both located in the housing. The rotating component includes a rotating housing and a rotating rod that are linked together. The rotating housing is connected to the moving contact. When the rotating rod rotates, it drives the moving contact to rotate through the rotating housing, so that the moving contact can connect to different stationary terminals. The elastic device includes a first spring and two rods disposed in a through hole of the rotating housing. The two rods are respectively located at both ends of the first spring. A plurality of slots are provided on the inner wall of the housing. Under the action of the spring, the two rods extend out of the through hole and abut against the slots. As can be seen from the structure of the rotary switch described above, it uses a spring radially arranged on the rotating housing and two rods to engage with multiple slots to achieve gear shifting. By applying a certain operating force, the rotating rod is driven to rotate, which in turn causes the rod to engage with different slots to achieve gear shifting. The rod head is designed to be spherical, so that the contact area between the rod and the slot is a small arc surface or point surface, reducing friction. This is a conventional force design. It is evident that existing rotary switches generally adopt a low operating force design, which cannot well meet the needs of high torque operation scenarios with greater operating force. Traditional radial springs will generate lateral force when the torque increases. Forcibly increasing the spring force or operating force will lead to severe structural wear and deformation. Therefore, it is necessary to design a high torque rotary switch that changes the contact pair form and strengthens the overall structural strength to meet the high torque requirements. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the rotary switches in the prior art generally adopt a low operating force design, which cannot meet the large torque operation scenarios with larger operating force, so as to provide a rotary switch with large operating torque and strong torque bearing capacity, which can meet the structural strength requirements under large torque scenarios.

[0005] To solve the above-mentioned technical problems, this utility model provides a high-torque rotary switch, including a switch body, a rotating handle, and a contact component and a shift structure disposed on the switch body. The switch body includes a top cover and a base fixedly connected together. The shift structure includes a shift wheel, a rotating disk, and a pressure component stacked between the top cover and the base along the axial direction of the rotating handle. The rotating disk is coaxially linked with the rotating handle. The rotating disk and the top cover are connected to form a limiting cavity surrounding and accommodating the pressure component and the shift wheel. The shift wheel is positioned in the limiting cavity and is axially opposite to the rotating disk. The rotating disk has at least one set of shift grooves arranged circumferentially on the side facing the shift wheel. The shift wheel has at least one set of shift teeth corresponding to and meshing with the at least one set of shift grooves. The pressure component is disposed between the top cover and the shift wheel and applies axial pressure to the shift teeth against the shift grooves, so that the shift teeth are embedded in the shift grooves to form a surface contact meshing structure.

[0006] In the aforementioned high-torque rotary switch, the rotating disk has an annular gearing boss formed on the side facing the gearing wheel. The rotating disk includes two sets of gearing grooves symmetrically arranged about its axis on the gearing boss. The bottom surface of the gearing wheel is correspondingly provided with two sets of gearing teeth that are axially engaged with the two sets of gearing grooves.

[0007] In the aforementioned high-torque rotary switch, each set of gear slots includes multiple meshing blocks and multiple toothed slots arranged circumferentially on the gear boss. Each set of gear teeth consists of one or two toothed blocks whose contours match the toothed slots. The two side walls of the toothed slots are two meshing surfaces connecting adjacent meshing blocks. The meshing surfaces are inclined surfaces. The opening width of the toothed slots gradually decreases from the outside of the gear boss to its inside.

[0008] In the aforementioned high-torque rotary switch, the toothed groove has a trapezoidal groove or a sawtooth groove, and the gear teeth are trapezoidal or sawtooth blocks with a profile that matches the toothed groove.

[0009] In the aforementioned high-torque rotary switch, the gear structure further includes a jog gear assembly disposed between the rotating disk, the gear wheel, and the upper cover. The jog gear assembly includes two jog smoothing grooves disposed on the gear boss of the rotating disk and located between two sets of gear grooves, and a reset spring disposed in an arc-shaped guide groove on the inner side of the upper cover. The rotating disk has a push block slidably connected in the arc-shaped guide groove. When the gear tooth slides to the jog smoothing groove, the push block squeezes the reset spring.

[0010] In the aforementioned high-torque rotary switch, the upper cover includes an annular limiting platform surrounding the limiting cavity and an arc-shaped limiting platform located outside the annular limiting platform. An arc-shaped guide groove for installing a reset spring is formed between the arc-shaped limiting platform and the annular limiting platform. The rotating disk cooperates to cover the opening end of the annular limiting platform.

[0011] In the aforementioned high-torque rotary switch, the rotating disk includes an annular limiting groove nested with an annular limiting platform and an annular limiting surface formed on the outside of the annular limiting groove. The annular limiting surface cooperates to block the opening position of the arc-shaped guide groove. The push block is formed on the annular limiting surface, and the stop boss is formed inside the annular limiting groove.

[0012] In the aforementioned high-torque rotary switch, the inner wall of the annular limiting platform is provided with multiple limiting slots extending along its axial direction, and the side wall of the gear wheel is provided with multiple limiting blocks that are slidably inserted into the multiple limiting slots.

[0013] In the aforementioned high-torque rotary switch, the gear shift wheel and the upper cover are respectively provided with a rotating hole through which the rotating handle can pass. The rotating hole is connected to the limiting cavity along the rotating handle through axis. The pressure component includes multiple pressure springs disposed between the upper cover and the gear shift wheel. The multiple pressure springs are arranged in a ring array around the rotating hole, so that the elastic force of each spring is symmetrically distributed with the rotating handle axis as the center. The top surface of the gear shift wheel facing away from the rotating disk is provided with multiple positioning recesses suitable for installing multiple pressure springs.

[0014] In the aforementioned high-torque rotary switch, the contact assembly includes two output terminals and one input terminal disposed on the base, and two elastic contact pieces disposed opposite to the input terminal and respectively cooperating with the two output terminals; the lower end of the rotating handle is rotatably connected to a positioning shaft formed in the base, and the bottom of the rotating disk is provided with a plurality of driving protrusions at an annular interval around the rotating handle, and the two elastic contact pieces are respectively disposed on the movement path of the plurality of driving protrusions, and the plurality of driving protrusions respectively have an arc-shaped driving surface that presses against the two elastic contact pieces.

[0015] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0016] 1. In the high-torque rotary switch provided by this utility model, a limiting cavity is formed by connecting the rotating disk and the upper cover. The gear shift wheel is positioned in the limiting cavity and arranged axially opposite to the rotating disk, forming an axially stacked closed limiting structure. This axially stacked structure design makes full use of the axial space of the switch, effectively reducing the radial dimension of the switch, making the overall structure of the switch more compact, and significantly improving the rigidity and deformation resistance of the overall structure. The gear shift teeth of the gear shift wheel are embedded into the gear shift groove of the rotating disk by the axial pressure of the pressure component, forming a surface contact meshing structure. The surface contact significantly increases the contact area of ​​the meshing area and increases the operation of gear shifting. By distributing the large operating force across a larger contact surface, the contact stress per unit area is reduced, allowing the rotary switch to stably withstand larger operating torques without plastic deformation or crushing. This technology, through improved designs such as axial stacking, axial pressure, embedded surface engagement, and a closed limiting cavity, significantly enhances the operating torque and torque bearing capacity, improves overall structural rigidity and strength, and provides extremely high position holding force and anti-disengagement capability. It meets the structural strength requirements under high torque scenarios and is suitable for power supplies and electrical appliances requiring high operating force control, broadening the application range of rotary switches and improving product performance.

[0017] 2. In the high-torque rotary switch provided by this utility model, the gear teeth are embedded in the gear slot under the continuous axial pressure of the pressure spring, forming a deep engagement. The embedded engagement provides a greater engagement depth and contact area, which means that a greater torque is required to overcome the axial pressure and make the gear teeth climb out of the gear slot. This provides a higher gear holding force and disengagement torque, which is the core requirement of the high-torque switch design of this technical solution. This structural setting, through axial force, makes the entire stacked structure of the upper cover-pressure component-gear wheel-rotating disk axially compressed, forming a highly compact and extremely rigid whole, which improves the overall structural strength and rigidity of the switch and can better withstand the internal stress brought about by high torque operation.

[0018] 3. In the high-torque rotary switch provided by this utility model, the tapered toothed groove and inclined meshing surface design provide a forced guide for the gear teeth, ensuring that the gear teeth can be accurately embedded in the geometric center of the toothed groove each time, avoiding off-center wear. The inclined meshing surface design is responsible for guiding, buffering and force conversion during the gear shifting process, connecting adjacent meshing blocks to achieve smooth shifting. When the gear teeth are embedded in the bottom of the tapered toothed groove, the inclined meshing surfaces on both sides form a self-locking wedge effect, enhancing the anti-disengagement capability.

[0019] 4. In the high-torque rotary switch provided by this utility model, the locking position requires high holding force to prevent accidental shifting, while the jogging position requires low resistance for quick reset. The key to this jogging smooth groove is that it is shallower and smoother than the main position groove, without a wedge-shaped structure. Therefore, the gear teeth have a small embedding depth and a small contact surface, resulting in a naturally low disengagement torque. The jogging smooth groove design significantly reduces the disengagement torque, making jogging gear switching easier. When the rotating handle is rotated to the jogging position, the gear teeth slide into the jogging smooth groove with minimal disengagement torque. At this time, the push block compresses the reset spring to store energy. After the rotating handle is released, the reset spring pushes the push block to slide along the arc-shaped guide groove, forcing the rotating disk to rotate in the opposite direction, causing the gear teeth to exit the jogging position and automatically reset to the adjacent main position.

[0020] 5. In the high-torque rotary switch provided by this utility model, the upper cover and the rotating disk are axially nested together by an annular limiting platform and an annular limiting groove, thereby forming a closed limiting cavity that surrounds and constrains the gear wheel, gear tooth / groove meshing pair, and pressure component, providing excellent mechanical protection. This annular nesting structure greatly improves the torsional stiffness, and the annular limiting platform structure itself also enhances the overall rigidity. In addition, the arc-shaped limiting platform and the annular limiting platform form a closed arc-shaped guide groove, thereby restricting the reset spring to be installed within the arc-shaped guide groove, ensuring that the spring is always compressed / released along a predetermined arc trajectory. This design ensures that the axial force of the pressure component acts perpendicularly on the end face of the gear wheel, ensuring that the pressure distribution on the meshing surface of the gear tooth and the gear groove is uniform.

[0021] 6. In the high-torque rotary switch provided by this utility model, multiple limiting blocks are embedded in the axially extending limiting slots to radially position the gear block within the limiting cavity, thereby completely locking the circumferential rotational freedom of the gear wheel. This prevents the gear block from rotating when subjected to force and ensures that the gear wheel and the rotating disk are coaxially aligned. When the gear wheel is subjected to the axial force of the pressure component, it can only move axially along the limiting slot, ensuring reliable meshing between the gear teeth and the gear grooves on the rotating disk, and realizing multi-gear switching under high operating force.

[0022] 7. In the high-torque rotary switch provided by this utility model, two sets of independent elastic contact pieces are connected in parallel to the input terminal. Each elastic contact piece can be driven by multiple driving protrusions. According to the multiple driving protrusions being distributed in a ring around the rotating handle and corresponding one-to-one with the multiple gear positions arranged circumferentially in the gear position structure, the driving protrusions form a rolling progressive contact with the elastic contact pieces through the arc-shaped driving surface during the rotation of the rotating handle. The elastic contact pieces provide continuous contact pressure through their own deformation, thereby driving the corresponding elastic contact pieces to contact or separate from the output terminal. The rotating handle realizes the multi-path switching capability of the rotary switch through the cooperation of multiple driving protrusions and two elastic contact pieces. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the planar structure of the high-torque rotary switch provided by this utility model;

[0025] Figure 2 A cross-sectional structural schematic diagram of the high-torque rotary switch provided by this utility model;

[0026] Figure 3 for Figure 1 A schematic cross-sectional view along line AA is shown below.

[0027] Figure 4 for Figure 1 A schematic diagram of the cross section along line BB is shown.

[0028] Figure 5 This is a schematic diagram of the installation structure of the gear shift structure of this utility model;

[0029] Figure 6 This is a schematic diagram of the installation structure of the gear shift wheel of this utility model;

[0030] Figure 7 This is a schematic diagram showing the installation of the rotating disc and gear wheel of this utility model;

[0031] Figure 8 This is a schematic diagram of the rotating handle and rotating disk of this utility model.

[0032] Figure Descriptions: 1. Top cover; 11. Annular limiting platform; 12. Arc-shaped limiting platform; 13. Arc-shaped guide groove; 14. Limiting slot; 2. Base; 21. Input terminal; 22. Output terminal; 23. Elastic contact piece; 3. Rotating handle; 4. Gear wheel; 41. Gear tooth; 42. Limiting block; 5. Rotating disk; 51. Gear groove; 511. Toothed groove; 512. Engaging block; 52. Gear boss; 53. Jog smoothing groove; 54. Annular limiting groove; 55. Annular limiting surface; 56. Push block; 6. Pressure assembly; 61. Pressure spring; 7. Return spring; 8. Drive protrusion; 9. Limiting cavity. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0036] Example

[0037] This utility model provides, for example Figures 1-8 The diagram illustrates a high-torque rotary switch, comprising a switch body, a rotating handle 3, and contact components and a position mechanism disposed on the switch body. The position mechanism strictly corresponds to the contact group of the contact component inside the switch, with each position energizing only a specific circuit. The switch body includes a fixedly connected upper cover 1 and a base 2. The position mechanism includes a position wheel 4, a rotating disk 5, and a pressure component 6, stacked along the axial direction of the rotating handle 3 between the upper cover 1 and the base 2. The rotating disk 5 is coaxially linked with the rotating handle 3, and the rotating disk 5 is connected to the upper cover 1 to form a package. A limiting cavity 9 is provided to accommodate the pressure assembly 6 and the gear wheel 4. The gear wheel 4 is positioned in the limiting cavity 9 and is axially opposite to the rotating disk 5. The rotating disk 5 has at least one set of gear grooves 51 arranged circumferentially on the side facing the gear wheel 4. The gear wheel 4 is correspondingly provided with at least one set of gear teeth 41 that mesh with the at least one set of gear grooves 51. The pressure assembly 6 is disposed between the upper cover 1 and the gear wheel 4 and applies axial pressure to the gear teeth 41 against the gear grooves 51, so that the gear teeth 41 are embedded in the gear grooves 51 to form a surface contact meshing structure.

[0038] In the above embodiment, a limiting cavity 9 is formed by connecting the rotating disk 5 and the upper cover 1. The gear shift wheel 4 is placed in the limiting cavity 9 and arranged axially opposite to the rotating disk 5, forming an axially stacked closed limiting structure. This axially stacked structure design makes full use of the axial space of the switch, effectively reduces the radial dimension of the switch, makes the overall structure of the switch more compact, and greatly improves the rigidity and deformation resistance of the overall structure. According to the gear shift teeth 41 of the gear shift wheel 4, they are embedded into the gear shift groove 51 of the rotating disk 5 by the axial pressure of the pressure component 6, forming a surface contact meshing structure. The surface contact greatly increases the contact area of ​​the meshing area and increases the gear shifting speed. The operating torque is distributed over a larger contact surface, reducing the contact stress per unit area. This allows the rotary switch to stably withstand larger operating torques without plastic deformation or crushing. Through improved designs such as axial stacking, axial pressure, embedded surface engagement, and a closed limiting cavity, the rotary switch achieves a significant increase in operating torque and torque bearing capacity, improves overall structural rigidity and strength, and provides extremely high position holding force and anti-disengagement capability. It can meet the structural strength requirements under high torque scenarios and is suitable for power supply appliances and other equipment requiring high operating force control, thus broadening the application range of rotary switches and improving product performance.

[0039] As a preferred embodiment, such as Figures 7-8 As shown, the rotating disk 5 has an annular shift boss 52 formed on the side facing the shift wheel 4. The rotating disk 5 includes two sets of shift grooves 51 symmetrically arranged about its axis on the shift boss 52. The bottom surface of the shift wheel 4 is provided with two sets of shift teeth 41 that are axially engaged with the two sets of shift grooves 51. This structure provides double positioning constraint for the circumferential rotation of the rotating disk 5 through the cooperation of the two sets of shift teeth 41 and the shift grooves 51. When the two sets of teeth and grooves are symmetrically meshed, the torque balance is formed through the two sets of meshing surfaces, making the circumferential stress distribution of the shift boss more uniform. This can eliminate the tilting tendency of the shift wheel, which is beneficial to increase the rated torque of the rotary switch, and can distribute the load and reduce stress.

[0040] The following is combined Figures 2-8 A detailed explanation of the specific structure of the gear slot and gear teeth is provided:

[0041] Each gear slot 51 includes multiple meshing blocks 512 and multiple toothed slots 511 arranged circumferentially on the gear boss 52. Each gear tooth 41 consists of one or two toothed blocks whose contours match the toothed slots 511. The toothed blocks are fitted into the toothed slots 511 and can switch positions in multiple toothed slots 511 during the rotation of the rotating disk 5, realizing smooth switching between gears. The two side walls of the toothed slots 511 are two meshing surfaces connecting adjacent meshing blocks 512, and the meshing surfaces are inclined structures. The inclined surface design is responsible for guiding, buffering and force conversion during the shifting process. The opening width of the toothed groove 511 gradually decreases from the outside of the gear shift boss 52 to its inside. This gradually narrowing toothed groove 511 and the inclined meshing surface play a forced guiding role for the gear shift teeth 41, ensuring that the gear shift teeth 41 can accurately embed into the geometric center of the toothed groove 511 each time, avoiding off-center wear. When the gear shift teeth 41 are embedded into the bottom of the gradually narrowing toothed groove 511, the inclined meshing surfaces on both sides form a self-locking wedge effect, enhancing the anti-disengagement capability. Specifically, the toothed groove 511 has a trapezoidal groove or a sawtooth groove, and the gear tooth 41 is a trapezoidal tooth block or a sawtooth tooth block with a contour that matches the toothed groove 511. It can be seen that the toothed block and the toothed groove 511 are in surface-to-surface meshing. This embedded surface meshing structure, combined with axial preload, provides stronger mechanical interlocking, making it less likely to disengage or malfunction. The gear position is maintained more stably and reliably. The axial pressure acts directly on the meshing surface, and the direction of the force is basically consistent with the direction required for meshing. This avoids the lateral component force or bending moment that may be caused by radial force application, resulting in higher energy transfer efficiency and more reasonable structural stress.

[0042] In this embodiment, reference Figures 7-8The rotary switch has a gear position structure with three locking positions and one jog position. The three locking positions are formed by the engagement of gear position grooves 51 and gear position teeth 41. Specifically, each set of gear position grooves 51 includes three toothed grooves 511 provided on the gear position boss 52, and each set of gear position teeth 41 includes at least one toothed block meshing with the three toothed grooves 511. To realize the jog position control of the rotary switch, the gear position structure also includes a jog position disposed between the rotating disk 5, the gear position wheel 4, and the upper cover 1. The inching gear assembly includes two inching smooth grooves 53 disposed on the gear shift boss 52 of the rotating disk 5 and between two sets of gear shift grooves 51, and a return spring 7 disposed in the arc-shaped guide groove 13 on the inner side of the upper cover 1. The rotating disk 5 has a push block 56 slidably connected in the arc-shaped guide groove 13. When the gear shift tooth 41 slides to the inching smooth groove 53, the push block 56 squeezes the return spring 7, and the inching gear is formed by the gear shift tooth 41 cooperating with the inching smooth groove 53. This gear shifting structure is designed to meet the needs of different gear positions. The lock-up position requires high holding force to prevent accidental shifting, while the jogging position requires low resistance for quick reset. The key to this jogging smooth groove 53 is that it is shallower and smoother than the main gear slot, without any inclined wedge structure. Therefore, the gear teeth 41 have a small embedding depth and a small contact surface, resulting in a naturally low disengagement torque. The jogging smooth groove 53 significantly reduces the disengagement torque, making jogging gear shifting easier. Thus, when the rotating handle 3 is rotated to the jogging position, the gear teeth 41 slide into the jogging smooth groove 53 with lower disengagement torque. At this time, the push block 56 compresses the reset spring 7 to store energy. After releasing the rotating handle 3, the reset spring 7 drives the push block 56 to slide along the arc-shaped guide groove 13, forcibly pushing the rotating disk 5 to rotate in the opposite direction, thereby causing the gear teeth 41 to exit the jogging position and automatically reset to the adjacent main gear slot.

[0043] In summary, based on the structural design of the aforementioned locking and jogging positions, it can be seen that the gear slot 51 adopts a deep groove and inclined wedge-shaped self-locking structure design. The gear teeth 41 and gear slot 51 have a large meshing depth and sufficient surface contact, requiring a large torque to disengage and switch gears, ensuring stable locking after gear switching. This allows the multiple locking positions formed by the gear teeth 41 and gear slot 51 to achieve high disengagement torque. Correspondingly, the jogging smooth groove 53 has a shallow meshing depth and small contact area. After the external force is removed, only the force of the return spring 7 is needed to drive the rotating disk 5 to rotate in the opposite direction and drive the gear teeth 41 back to the adjacent gear slot 51, realizing the jogging logic of being pushed away by the spring as soon as the hand is released. This allows the jogging positions formed by the gear teeth 41 and jogging smooth groove 53 to achieve low disengagement torque. Through the torque-graded design of the gear structure, the rotary switch achieves an integrated function of multiple locking and jogging modes, combining stable locking and flexible jogging switching operation characteristics.

[0044] Combination Figure 2 , Figures 5-6 As shown, the upper cover 1 includes an annular limiting platform 11 surrounding the limiting cavity 9 and an arc-shaped limiting platform 12 disposed outside the annular limiting platform 11. An arc-shaped guide groove 13 for installing the reset spring 7 is formed between the arc-shaped limiting platform 12 and the annular limiting platform 11. The rotating disk 5 cooperates to cover the opening end of the annular limiting platform 11. The rotating disk 5 includes an annular limiting groove 54 nested with the annular limiting platform 11 and an annular limiting surface 55 formed outside the annular limiting groove 54. The annular limiting surface 55 cooperates to cover the opening of the arc-shaped guide groove 13. The push block 56 is formed on the annular limiting surface 55, and the stop boss 52 is formed in the annular limiting groove 54. In this structural configuration, the upper cover 1 and the rotating disk 5 are axially nested together via an annular limiting platform 11 and an annular limiting groove 54, thereby forming a closed limiting cavity 9. This cavity completely surrounds and constrains the gear wheel, gear tooth / groove meshing pair, and pressure assembly, providing excellent mechanical protection. This annular nesting structure significantly improves torsional stiffness, and the annular limiting platform 11 structure itself also enhances overall rigidity. In addition, the arc-shaped limiting platform 12 and the annular limiting platform 11 enclose and form a closed arc-shaped guide groove 13, thereby restricting the reset spring 7 within the arc-shaped trajectory, ensuring that the spring is always compressed / released along the predetermined arc-shaped trajectory. This design ensures that the axial force of the pressure assembly 6 acts perpendicularly on the end face of the gear wheel, ensuring uniform pressure distribution on the meshing surface of the gear tooth 41 and the gear groove 51.

[0045] To restrict the circumferential rotation of the gear shift wheel 4 within the limiting cavity 9, the inner wall of the annular limiting platform 11 is provided with multiple limiting slots 14 extending axially. Correspondingly, the side wall of the gear shift wheel 4 is provided with multiple limiting blocks 42 that slide into the multiple limiting slots 14. This structural arrangement, by embedding the multiple limiting blocks 42 into the axially extending limiting slots 14, radially positions the gear shift blocks within the limiting cavity 9, completely locking the circumferential rotational freedom of the gear shift wheel 4. This prevents the gear shift blocks from rotating under force and ensures that the gear shift wheel 4 is coaxially aligned with the rotating disk 5. When the gear shift wheel 4 is subjected to the axial force of the pressure component 6, it can only move axially along the limiting slots 14, ensuring reliable engagement between the gear shift teeth 41 and the gear shift grooves on the rotating disk 5, thus enabling multi-gear switching under high operating force.

[0046] like Figure 3 , Figure 6As shown, the gear shift wheel 4 and the upper cover 1 are respectively provided with a rotating hole through which the rotating handle 3 can pass. The rotating hole is connected to the limiting cavity 9 along the through-axis of the rotating handle 3. The pressure assembly 6 includes a plurality of pressure springs 61 disposed between the upper cover 1 and the gear shift wheel 4. The plurality of pressure springs 61 are distributed in a ring array around the rotating hole. Specifically, four pressure springs 61 are distributed. The top surface of the gear shift wheel 4 facing away from the rotating disk 5 is provided with a plurality of positioning recesses suitable for installing the plurality of pressure springs 61. The plurality of positioning recesses are used to position and install the plurality of pressure springs 61. The advantage of this design is that four pressure springs 61 are evenly spaced around the rotating hole, so that the elastic force of each spring is symmetrically distributed with the axis of the rotating handle 3 as the center. Under this structural layout, the gear wheel 4 is transmitted along the axial direction by the resultant force of the axial pressure of the multiple pressure springs. The symmetrical pressure makes the gear wheel 4 translate axially without tilting, ensuring that the meshing surface of the gear teeth 41 and the gear groove 51 of the rotating disk 5 matches and fits. The pressure is evenly distributed, and the uniform pressure keeps the gear wheel 4 parallel to the rotating disk 5, and there will be no wobbling or collision during vibration, thus ensuring meshing accuracy.

[0047] Combination Figure 1 , Figures 4-5As shown, the contact assembly includes two output terminals 22 and one input terminal 21 disposed on the base 2, and two elastic contact pieces 23 disposed opposite to the input terminal 21 and respectively cooperating with the two output terminals 22. The two elastic movable contact pieces 24 are provided with movable contacts, and the two output terminals 22 are provided with stationary contacts. In summary, the on / off state of different contact groups of the rotary switch is controlled by rotating the handle. The function of the gear structure is to hold the switch in the set position after the rotary switch is turned to the position, so that the different contact groups in the contact assembly are in contact or separated, thereby controlling the connection and disconnection of multiple circuits. That is, each gear has a set of contact groups connected to other circuits. The lower end of the rotating handle 3 is rotatably connected to a positioning shaft formed within the base 2. Three driving protrusions 8 are arranged annularly around the bottom of the rotating disk 5, surrounding the rotating handle 3. Two elastic contact pieces 23 are respectively positioned along the movement paths of the three driving protrusions 8. Each of the three driving protrusions 8 has an arc-shaped driving surface that presses against the two elastic contact pieces 23. The arc-shaped driving surface of one driving protrusion 8 is longer, while the arc-shaped driving surfaces of the other two driving protrusions 8 are shorter. This design perfectly meets the requirements of three locking positions and one inching position. In this configuration, two sets of independent elastic contact pieces 23 are connected in parallel to the input terminal. 21. Each elastic contact piece 23 can be pushed and driven by multiple driving protrusions 8. According to the multiple driving protrusions 8 rotating around and distributed in a ring, and corresponding to multiple gear positions arranged circumferentially in the gear position structure, the rotating handle 3 drives the multiple driving protrusions 8 to rotate synchronously. During this process, the arc-shaped driving surface forms a rolling progressive contact with the elastic contact piece 23. The elastic contact piece 23 uses its own deformation to provide continuous contact pressure, thereby driving the corresponding elastic contact piece 23 to make contact or separate from the output terminal 22, thus connecting the corresponding circuit. Thus, the multi-path switching capability of the rotary switch is realized through the cooperation of multiple driving protrusions 8 and two elastic contact pieces 23.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A high-torque rotary switch, comprising a rotating handle (3) disposed on a switch body, a contact assembly, and a stop structure, wherein the switch body comprises a top cover (1) and a base (2) fixedly connected together, characterized in that: The gear shift structure includes a gear shift wheel (4), a rotating disk (5), and a pressure assembly (6) stacked between the upper cover (1) and the base (2) along the axial direction of the rotating handle (3). The rotating disk (5) is coaxially linked with the rotating handle (3). The rotating disk (5) is connected to the upper cover (1) to form a limiting cavity (9) that surrounds and accommodates the pressure assembly (6) and the gear shift wheel (4). The gear shift wheel (4) is positioned in the limiting cavity (9) and is axially opposite to the rotating disk (5). The rotating disk (5) has at least one set of gear slots (51) arranged circumferentially on the side facing the gear wheel, and the gear wheel (4) has at least one set of gear teeth (41) meshing with the gear slots (51); the pressure component (6) is disposed between the upper cover (1) and the gear wheel (4) and applies axial pressure to the gear teeth (41) against the gear slots (51), so that the gear teeth (41) are embedded in the gear slots (51) to form a surface contact meshing structure.

2. The large torque construction rotary switch according to claim 1, characterized in that: The rotating disk (5) has an annular gearing boss (52) formed on the side facing the gearing wheel (4). The rotating disk (5) includes two sets of gearing grooves (51) symmetrically arranged on the gearing boss (52) about its axis. The bottom surface of the gearing wheel (4) is provided with two sets of gearing teeth (41) that are axially engaged with the two sets of gearing grooves (51).

3. The large torque construction rotary switch according to claim 2, characterized in that: Each gear slot (51) includes multiple meshing blocks (512) and multiple toothed grooves (511) arranged circumferentially on the gear boss (52). Each gear tooth (41) consists of one or two toothed blocks whose contours match the toothed groove (511). The two side walls of the toothed groove (511) are two meshing surfaces that connect adjacent meshing blocks (512). The meshing surfaces are inclined surfaces. The opening width of the toothed groove (511) gradually decreases from the outside of the gear boss (52) to its inside.

4. The large torque construction rotary switch according to claim 3, characterized in that: The toothed groove (511) has a trapezoidal groove or a sawtooth groove, and the gear tooth (41) is a trapezoidal tooth block or a sawtooth tooth block with a profile that matches the toothed groove (511).

5. A large torque construction rotary switch according to any one of claims 1-4, characterized in that: The gear structure also includes a jog gear assembly disposed between the rotating disk (5), the gear wheel (4) and the upper cover (1). The jog gear assembly includes two jog smooth grooves (53) disposed on the gear boss (52) of the rotating disk (5) and between two sets of gear grooves (51), and a return spring (7) disposed in the arc-shaped guide groove (13) on the inner side of the upper cover (1). The rotating disk (5) has a push block (56) slidably connected in the arc-shaped guide groove (13). The push block (56) squeezes the return spring (7) when the gear tooth (41) slides to the jog smooth groove (53).

6. The large torque construction rotary switch according to claim 5, characterized in that: The upper cover (1) includes an annular limiting platform (11) surrounding the limiting cavity (9) and an arc-shaped limiting platform (12) located outside the annular limiting platform (11). An arc-shaped guide groove (13) for installing a reset spring (7) is formed between the arc-shaped limiting platform (12) and the annular limiting platform (11). The rotating disk (5) cooperates to cover the opening end of the annular limiting platform (11).

7. The large torque construction rotary switch according to claim 6, characterized in that: The rotating disk (5) includes an annular limiting groove (54) nested with the annular limiting platform (11) and an annular limiting surface (55) formed on the outside of the annular limiting groove (54). The annular limiting surface (55) cooperates to cover the opening position of the arc-shaped guide groove (13). The push block (56) is formed on the annular limiting surface (55), and the stop boss (52) is formed in the annular limiting groove (54).

8. The large torque construction rotary switch according to claim 7, characterized in that: The inner wall of the annular limiting platform (11) is provided with a plurality of limiting slots (14) extending along its axial direction, and the side wall of the gear wheel (4) is provided with a plurality of limiting blocks (42) that are slidably inserted into the plurality of limiting slots (14).

9. A large torque construction rotary switch according to any one of claims 6-8, characterized in that: The gear shift wheel (4) and the upper cover (1) are respectively provided with a rotating hole through which the rotating handle (3) can pass. The rotating hole is axially connected to the limiting cavity (9) along the rotating handle (3). The pressure assembly (6) includes a plurality of pressure springs (61) disposed between the upper cover (1) and the gear shift wheel (4). The plurality of pressure springs (61) are arranged in a ring array around the rotating hole, so that the elastic force of each spring is symmetrically distributed with the axis of the rotating handle (3) as the center. The top surface of the gear shift wheel (4) facing away from the rotating disk (5) is provided with a plurality of positioning recesses suitable for installing the plurality of pressure springs (61).

10. The large torque construction rotary switch according to claim 9, characterized in that: The contact assembly includes two output terminals (22) and one input terminal (21) disposed on the base (2), and two elastic contact pieces (23) disposed opposite to the input terminal (21) and respectively cooperating with the two output terminals (22); the lower end of the rotating handle (3) is rotatably connected to a positioning shaft formed in the base (2), and the bottom of the rotating disk (5) is provided with a plurality of driving protrusions (8) arranged in a ring around the rotating handle (3). The two elastic contact pieces (23) are respectively disposed on the movement path of the plurality of driving protrusions (8), and the plurality of driving protrusions (8) respectively have an arc-shaped driving surface that presses against the two elastic contact pieces (23).

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