Power switching mechanism

Abstract

A power switching mechanism, comprising: a first transmission shaft (110), a second transmission shaft (120), a third transmission shaft (130), a first power coupling member (140), a second power coupling member (150), a power switching assembly (170), and a housing (180). The first transmission shaft (110) and the second transmission shaft (120) are rotatably mounted at two ends of the housing (180). The third transmission shaft (130) is rotatably mounted on the housing (180) and is located between the first transmission shaft (110) and the second transmission shaft (120), and two ends of the third transmission shaft (130) are respectively spaced apart from the first transmission shaft (110) and the second transmission shaft (120). The first power coupling member (140) is disposed between the first transmission shaft (110) and the third transmission shaft (130). The second power coupling member (150) is disposed between the second transmission shaft (120) and the third transmission shaft (130). The power switching assembly (170) acts on the first power coupling member (140) and the second power coupling member (150), enabling the first power coupling member (140) to couple the first transmission shaft (110) and the third transmission shaft (130), or enabling the second power coupling member (150) to couple the second transmission shaft (120) and the third transmission shaft (130). The power switching mechanism has a simple structure and enables convenient switching.

Description

Power switching mechanism Technical Field

[0001] This invention relates to the field of transmission technology, and more specifically, to a power switching mechanism. Background Technology

[0002] A power switching mechanism is a device that can automatically or manually switch between two different power sources. It is widely used in various applications requiring redundant power systems or flexible power switching, ensuring that when one power source fails or is unsuitable, it can quickly switch to another power source, guaranteeing continuous system operation.

[0003] Existing power switching mechanisms typically employ two independent electromagnetic clutches, friction clutches, or hydraulic clutches, which are cumbersome to operate and not conducive to rapid power switching. Summary of the Invention

[0004] The present invention aims to provide a power switching mechanism that simplifies the structure of the power switching mechanism and enables rapid switching.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The present invention provides a power switching mechanism, including a first drive shaft, a second drive shaft, a third drive shaft, a first power coupling component, a second power coupling component, a power switching assembly, and a housing;

[0007] The first and second drive shafts are rotatably mounted at both ends of the housing;

[0008] The third drive shaft is rotatably mounted on the housing and located between the first drive shaft and the second drive shaft. The two ends of the third drive shaft are respectively spaced apart from the first drive shaft and the second drive shaft.

[0009] The first power coupling component is disposed between the first drive shaft and the third drive shaft;

[0010] The second power coupling component is disposed between the second drive shaft and the third drive shaft;

[0011] The power switching component acts on the first power coupling member and the second power coupling member, enabling the first power coupling member to couple the first drive shaft and the third drive shaft, or the second power coupling member to couple the second drive shaft and the third drive shaft.

[0012] In an optional implementation, the power switching assembly includes an operating lever;

[0013] The first power coupling component is movably disposed between the first drive shaft and the third drive shaft;

[0014] The second power coupling component is movably disposed between the second drive shaft and the third drive shaft;

[0015] The first drive shaft is provided with a first through hole, and the third drive shaft is provided with a second through hole;

[0016] The operating lever passes through the first through hole and the second through hole, and one end of the operating lever extends from the end of the first drive shaft. The operating lever can act on the first power coupling component and the second power coupling component.

[0017] The operating lever can move the first power coupling member and the second power coupling member so that the first power coupling member is coupled to both the first drive shaft and the third drive shaft, and the second power coupling member is decoupled from at least one of the second drive shaft and the third drive shaft.

[0018] In an optional implementation, the power switching assembly further includes a first elastic element;

[0019] The first elastic element is disposed between the first power coupling element and the first drive shaft. The first elastic element can provide elastic force to the first power coupling element so that the first power coupling element is kept in a coupled state with the first drive shaft and the second drive shaft.

[0020] In an optional embodiment, the first power coupling member is provided with a first fitting structure and a second fitting structure;

[0021] The first drive shaft is provided with a third fitting structure that mates with the first fitting structure;

[0022] The first power coupling component is movably mounted on the first drive shaft, and the first fitting structure is fitted with the third fitting structure;

[0023] The first elastic element is a spring, which is sleeved on the operating lever, and the two ends of the first elastic element act on the first drive shaft and the first power coupling element, respectively.

[0024] The third drive shaft is provided with a fourth fitting structure that cooperates with the second fitting structure;

[0025] The operating lever can drive the first power coupling component to move towards the direction of the third drive shaft, so that the second fitting structure will fit into the fourth fitting structure.

[0026] In an optional implementation, the power switching assembly further includes a second elastic element and a stop element;

[0027] The second power coupling member is movably mounted on and coupled to the second drive shaft. The second power coupling member has a first position coupled to both the second drive shaft and the third drive shaft, and a second position coupled to the second drive shaft and separated from the third drive shaft.

[0028] The second elastic element is configured to provide elastic force to the second power coupling element in the direction of the third drive shaft;

[0029] The stop is provided in the housing. When the operating lever moves the second power coupling member to the second position, the stop can abut against the second power coupling member and restrict the second power coupling member to the second position.

[0030] The second drive shaft drives the second power coupling to rotate, which can release the stop from restricting the second power coupling, so that the second elastic element drives the second power coupling to move to the first position; the movement of the second power coupling to the first position can drive the operating lever to move, which in turn drives the first power coupling to move, so that the first power coupling is decoupled from at least one of the first drive shaft or the third drive shaft.

[0031] In an optional embodiment, the outer periphery of the second power coupling member is provided with an abutment groove, and the abutment groove is provided with a first guide portion;

[0032] The stop is elastic, with one end connected to the housing and the other end extending toward the second power coupling member, and can deform radially in the second power coupling member;

[0033] When the second power coupling component moves to the second position, the stop component can be inserted into the abutment groove under its own elastic force.

[0034] When the stop is inserted into the abutment groove, the stop will be pushed out of the abutment groove by the action of the first guide to release the abutment when the second power coupling member rotates.

[0035] In an optional embodiment, the abutment groove is an annular groove, which is recessed on the end face of the second power coupling member and located on the outer periphery of the second power coupling member. The outer side of the annular groove penetrates the outer periphery of the second power coupling member.

[0036] The first guide portion protrudes from the bottom wall of the annular groove, and the outer side of the first guide portion forms a first guide surface;

[0037] One end of the first guide surface is connected to the side wall of the annular groove, and the other end extends outward to the outer periphery of the second power coupling component.

[0038] In an optional embodiment, the bottom wall of the annular groove is further provided with a second guide portion, and the first guide portion and the second guide portion are arranged at intervals in the circumferential direction of the annular groove.

[0039] The sidewall of the first guide portion forms a second guide surface. One end of the second guide surface is connected to the sidewall of the annular groove, and the other end extends outward in a counterclockwise direction to the outer periphery of the second power coupling member.

[0040] One end of the first guide surface is connected to the side wall of the annular groove, and the other end extends outward in a clockwise direction to the outer periphery of the second power coupling component.

[0041] In an optional embodiment, the power switching mechanism further includes a pin; the side wall of the second drive shaft is provided with a through groove in the radial direction, the second power coupling member is provided with a third through hole in the axial direction, and a through pin hole in the radial direction; the second power coupling member is movably mounted on the second drive shaft through the third through hole; the pin is inserted into the pin hole and the groove in sequence, and can slide along the groove, and the end of the operating rod abuts against the pin;

[0042] and / or

[0043] The third drive shaft is provided with a meshing disc, and a fifth engagement structure is provided at one end of the meshing disc near the second drive shaft. A sixth engagement structure is provided at one end of the second power coupling member near the third drive shaft. When the second power coupling member is in the first position, the fifth engagement structure and the sixth engagement structure are engaged. When the second power coupling member is in the second position, the fifth engagement structure and the sixth engagement structure are separated.

[0044] In an optional implementation, the lever includes a first lever and a second lever;

[0045] The first through hole is provided with an abutment ring platform;

[0046] The first operating lever is equipped with a limiting ring platform. The first operating lever is inserted into the first through hole from the inside of the first drive shaft. The limiting ring platform and the abutment ring platform cooperate to prevent the first operating lever from coming out of the first through hole.

[0047] The second operating lever is inserted into the second through hole, with one end of the second operating lever abutting against the first power coupling member and the other end acting on the second power coupling member.

[0048] The beneficial effects of the power switching mechanism provided in this embodiment of the invention include:

[0049] This application provides a first power coupling component between the first and third drive shafts, and a second power coupling component between the second and third drive shafts. A power switching component acts on both the first and second power coupling components. The power switching component can simultaneously control the first and second power coupling components to achieve one of the first and second drive shafts to be connected to the third drive shaft. The overall structure is simple, and the operation is more convenient as it can be achieved by operating the power switching component. Attached Figure Description

[0050] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 is a cross-sectional view of the structure of the power switching mechanism provided in an embodiment of the present invention when the third drive shaft is coupled with the first drive shaft;

[0052] Figure 2 is a cross-sectional view of the structure of the power switching mechanism provided in the embodiment of the present invention when the third drive shaft is coupled with the second drive shaft;

[0053] Figure 3 is a schematic diagram of the axial structure of the second power coupling component of the power switching mechanism provided in an embodiment of the present invention;

[0054] Figure 4 is a schematic diagram of the end face projection of the second power coupling member of the power switching mechanism provided in an embodiment of the present invention;

[0055] Figure 5 is a side view of the second power coupling component of the power switching mechanism provided in an embodiment of the present invention.

[0056] Icons: 100-Power switching mechanism; 110-First drive shaft; 111-First through hole; 112-Mounting groove; 120-Second drive shaft; 121-Slide groove; 122-First end face; 123-Second end face; 124-Abutting plate; 130-Third drive shaft; 131-Second through hole; 132-Meshing plate; 133-Fifth fitting structure; 140-First power coupling element; 141-Fixing groove; 142-Stepped hole; 150-Second power coupling element; 151-Annular groove; 152-First guide part; 153-First guide surface; 154-Second guide part; 155-Second guide surface; 1 56-Third guide surface; 157-Fourth guide surface; 158-First step surface; 159-Second step surface; 161-Third step surface; 162-Third through hole; 163-Pin hole; 164-Sixth fitting structure; 170-Power switching assembly; 171-Operating lever; 172-First elastic element; 173-Second elastic element; 174-Stop element; 175-First operating lever; 176-Second operating lever; 180-Housing; 181-Cavity; 182-Mounting hole; 183-Support base; 184-Fixing hole; 185-First end cap; 186-Middle shell; 187-Second end cap; 190-Pin shaft. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0059] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0060] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0061] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0062] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0063] The following detailed description of the overall structure, working principle, and technical effects of the power switching device provided by the present invention, through embodiments and in conjunction with the accompanying drawings, is a practical example.

[0064] Referring to Figures 1 to 5, this embodiment provides a power switching mechanism 100, which can be applied in power generation equipment to achieve power switching. Of course, this power switching mechanism 100 can also be applied in other equipment to achieve power switching.

[0065] In this embodiment, the power switching mechanism 100 includes a first drive shaft 110, a second drive shaft 120, a third drive shaft 130, a first power coupling member 140, a second power coupling member 150, a power switching assembly 170, and a housing 180. The first drive shaft 110 and the second drive shaft 120 are rotatably mounted at both ends of the housing 180. The third drive shaft 130 is rotatably mounted on the housing 180 and located between the first drive shaft 110 and the second drive shaft 120. The two ends of the third drive shaft 130 are respectively spaced apart from the first drive shaft 110 and the second drive shaft 120. The first power coupling member 140 is disposed between the first drive shaft 110 and the third drive shaft 130. The second power coupling member 150 is disposed between the second drive shaft 120 and the third drive shaft 130. The power switching assembly 170 acts on the first power coupling member 140 and the second power coupling member 150, which can enable the first power coupling member 140 to couple the first drive shaft 110 and the third drive shaft 130, or the second power coupling member 150 to couple the second drive shaft 120 and the third drive shaft 130.

[0066] This embodiment provides a first power coupling member 140 between the first drive shaft 110 and the third drive shaft 130, and a second power coupling member 150 between the second drive shaft 120 and the third drive shaft 130. The power switching component 170 acts on the first power coupling member 140 and the second power coupling member 150. The power switching component 170 can simultaneously control the first power coupling member 140 and the second power coupling member 150 to achieve the connection between one of the first drive shaft 110 and the second drive shaft 120 and the third drive shaft 130. The overall structure is simple, and the operation is more convenient as it can be achieved by operating the power switching component 170.

[0067] Referring to Figures 1 to 5, in this embodiment, the first drive shaft 110 is used for transmission connection with the main power equipment. The second drive shaft 120 is used for transmission connection with the backup power equipment. The third drive shaft 130 is used for transmission connection with the equipment that needs to be operated. The main power can be an electric motor, while the backup power can be an engine. In the event of a power outage, damage to or maintenance of the main power equipment, the power switching mechanism 100 can be used to switch to the backup power equipment to achieve continuous operation. In this way, both the first drive shaft 110 and the second drive shaft 120 are used as power transmission shafts, while the third drive shaft 130 is used as a power output shaft. In other embodiments, the second drive shaft 120 may also be used for transmission connection with the main power equipment, while the first drive shaft 110 may be used for transmission connection with the backup power equipment.

[0068] In this embodiment, the housing 180 is provided with a cavity 181, and mounting holes 182 are provided at both ends of the cavity 181. The first drive shaft 110 and the second drive shaft 120 are both mounted on the mounting holes 182 at both ends of the cavity 181 via bearings. Two support seats 183 are provided at intervals inside the cavity 181, and both support seats 183 are provided with fixing holes 184. The third drive shaft 130 is mounted on the fixing holes 184 of the two support seats 183 via bearings. The first drive shaft 110, the second drive shaft 120, and the third drive shaft 130 are coaxially arranged.

[0069] Referring to Figures 1 to 5, in this embodiment, the third transmission shaft 130 is a gear shaft, which can transmit power outward through gear meshing. Of course, in other embodiments of this application, the third transmission shaft 130 can also transmit power outward through other commonly used transmission methods, such as chain drive, where a chain disc is provided on the third transmission shaft 130. Another example is a worm gear drive, where the third transmission shaft 130 is shaped like a worm.

[0070] In this embodiment, the housing 180 includes a first end cover 185, a middle shell 186, and a second end cover 187. The first end cover 185 and the second end cover 187 are detachably mounted on both sides of the middle shell 186 by bolts. A support base 183 is disposed on the middle shell 186. A first drive shaft 110 is mounted on the first end cover 185 by bearings, and a second drive shaft 120 is mounted on the second end cover 187 by bearings. This arrangement of the housing 180 facilitates assembly.

[0071] Referring to Figures 1 to 5, in this embodiment, the power switching assembly 170 includes an operating lever 171. A first power coupling member 140 is movably disposed between a first drive shaft 110 and a third drive shaft 130. A second power coupling member 150 is movably disposed between a second drive shaft 120 and a third drive shaft 130. The first drive shaft 110 is provided with a first through hole 111, and the third drive shaft 130 is provided with a second through hole 131. The operating lever 171 passes through the first through hole 111 and the second through hole 131, and one end of the operating lever 171 extends from the end of the first drive shaft 110. The operating lever 171 can act on the first power coupling member 140 and the second power coupling member 150. The operating lever 171 can drive the first power coupling member 140 and the second power coupling member 150 to move, so that the first power coupling member 140 is coupled with both the first transmission shaft 110 and the third transmission shaft, and the second power coupling member 150 is decoupled from at least one of the second transmission shaft 120 and the third transmission shaft 130.

[0072] In this embodiment, by setting up an operating lever 171, the first power coupling component 140 and the second power coupling component 150 can be moved by the operating lever 171, which can better realize power switching and make operation more convenient.

[0073] In this embodiment, the power switching assembly 170 further includes a first elastic element 172. The first elastic element 172 is disposed between the first power coupling member 140 and the first drive shaft 110. The first elastic element 172 can provide elastic force to the first power coupling member 140 so that the first power coupling member 140 is coupled with the first drive shaft 110 and the second drive shaft 120.

[0074] The main purpose of the first elastic element 172 in this embodiment is to keep the first power coupling element 140 in a coupled state when it is simultaneously coupled with the first drive shaft 110 and the third drive shaft 130, thus avoiding decoupling of the first power coupling element 140 due to non-human causes such as rotation or vibration. At the same time, the first elastic element 172 eliminates the need for fixing the operating lever 171, simplifying the structure.

[0075] Referring to Figures 1 to 5, in this embodiment, the first power coupling member 140 is provided with a first fitting structure and a second fitting structure. The first transmission shaft 110 is provided with a third fitting structure that cooperates with the first fitting structure. The first power coupling member 140 is movably mounted on the first transmission shaft 110, and the first fitting structure and the third fitting structure are fitted together. The first elastic member 172 is a spring, which is sleeved on the operating rod 171, and both ends of the first elastic member 172 act on the first transmission shaft 110 and the first power coupling member 140, respectively. The third transmission shaft 130 is provided with a fourth fitting structure that cooperates with the second fitting structure. The operating rod 171 can drive the first power coupling member 140 to move towards the third transmission shaft 130, so that the second fitting structure will engage with the fourth fitting structure.

[0076] Referring to Figures 1 to 5, in this embodiment, the first power coupling member 140 is movably mounted on the first transmission shaft 110. Switching power is achieved by simply pushing the operating lever 171, making operation more convenient. The first elastic member 172 is configured as a spring, and the spring is fitted onto the operating lever 171, which facilitates the application and installation of the spring. Furthermore, when the first power coupling member 140 is decoupled, it will not rotate, thereby improving energy utilization.

[0077] Specifically, the inner end face of the first drive shaft 110 has a recessed mounting groove 112, and the third fitting structure is disposed on the inner wall of the mounting groove 112. The third fitting structure is an internal spline. The first power coupling member 140 is disc-shaped and its size matches the mounting groove 112. The first fitting structure is an external spline disposed on the outer periphery of the first power coupling member 140. The first power coupling member 140 is movably mounted in the mounting groove 112 by the engagement of the internal and external splines. A fixing groove 141 is provided at one end of the first power coupling member 140 near the third drive shaft 130. The second fitting structure is an internal spline disposed on the inner wall of the fixing groove 141. The fourth fitting structure is an external spline disposed on the outer periphery of the third drive shaft 130. When the operating lever 171 pushes the first power coupling member 140 to move towards the third drive shaft 130, the internal spline of the first power coupling member 140 will engage with the external spline of the third drive shaft 130. Secondly, a limiting structure is also provided, which can limit the position of the first power coupling member 140 and prevent the first power coupling member 140 from disengaging from the first transmission shaft 110.

[0078] Referring to Figures 1 to 5, in this embodiment, the first power coupling component 140 is installed by providing a mounting groove 112 on the inner end face of the first drive shaft 110, which saves the length of the first drive shaft 110. Thus, the position of the first drive shaft 110 corresponding to the mounting groove 112 can be used to install a bearing. Setting the first, second, third, and fourth fitting structures as splines makes machining easier.

[0079] Understandably, the first power coupling member 140 has a separated position and a coupled position relative to the third drive shaft 130. When the first power coupling member 140 is in the separated position, it is housed in the mounting groove 112. When the first power coupling member 140 is in the coupled position, it partially moves out of the mounting groove 112 and couples with the end of the third drive shaft 130.

[0080] Of course, in some other embodiments of this application, the first power coupling member 140 can also be movably mounted on the third drive shaft 130, and the first power coupling member 140 can be coupled to the first drive shaft 110 by pulling the operating lever 171 outward.

[0081] Referring to Figures 1 to 5, in this embodiment, the power switching assembly 170 further includes a second elastic member 173 and a stop member 174. A second power coupling member 150 is movably mounted on and coupled to the second drive shaft 120. The second power coupling member 150 has a first position coupled to both the second drive shaft 120 and the third drive shaft 130, and a second position coupled to the second drive shaft 120 and separated from the third drive shaft 130. The second power coupling member 150 can move from the first position to the second position under the action of the operating lever 171. The second elastic member 173 is configured to provide a spring force to the second power coupling member 150 in the direction of the third drive shaft 130. The stop member 174 is disposed in the housing 180. When the operating lever 171 moves the second power coupling member 150 to the second position, the stop member 174 can abut against the second power coupling member 150, restricting the second power coupling member 150 to the second position. The second drive shaft 120 drives the second power coupling member 150 to rotate, which can release the stop member 174 from restricting the second power coupling member 150, so that the second elastic member 173 drives the second power coupling member 150 to move to the first position; when the second power coupling member 150 moves to the first position, it can drive the operating lever 171 to move, which in turn drives the first power coupling member 140 to move, so that the first power coupling member 140 is decoupled from at least one of the first drive shaft 110 or the third drive shaft 130.

[0082] This embodiment includes a second elastic element 173 and a stop element 174. The stop element 174 fixes the second power coupling element 150 in a second position, thus preventing unauthorized movement of the second power coupling element 150. The second elastic element 173 allows the first power coupling element 140 to decouple simultaneously after the stop element 174 is released, facilitating coupling of the second power coupling element 150. This simplifies the structure. Most importantly, the stop element 174 and the second elastic element 173 automatically couple the second power coupling element 150 to the second drive shaft 120 and the third drive shaft 130 without manual intervention; simply inputting power to the second drive shaft 120 is sufficient. This design allows for seamless power switching with automated systems.

[0083] In one application scenario, the first drive shaft 110 is connected to a motor, while the second drive shaft 120 is connected to a fuel engine. Under normal power supply conditions, the motor provides power. When the system detects a motor failure, it can automatically start the fuel engine. The running fuel engine drives the second drive shaft 120 to rotate, and the rotation stop 174 of the second drive shaft 120 releases the restriction on the second power coupling member 150. Then, under the action of the second elastic member 173, the second power coupling member 150 can be moved. In conjunction with the operating lever 171, the first power coupling member 140 is moved, thus achieving power switching and ensuring continuous power output from the third drive shaft 130.

[0084] Secondly, in another usage scenario, the first drive shaft 110 is connected to a motor, while the second drive shaft 120 is connected to a handwheel or other manually operated components. When manual operation is required, the operator does not need to manually switch power; simply driving the handwheel to rotate the second drive shaft 120 achieves power switching. When switching from handwheel to motor input, the user only needs to operate the control lever 171.

[0085] Referring to Figures 1 to 5, in this embodiment, the outer periphery of the second power coupling member 150 is provided with an abutment groove, and the abutment groove is provided with a first guide portion 152. The stop member 174 is elastic, one end of the stop member 174 is connected to the housing 180, and the other end extends toward the second power coupling member 150 and can deform radially in the second power coupling member 150. When the second power coupling member 150 moves from the first position to the second position, the stop member 174 can be inserted into the abutment groove under the action of its own elasticity. When the stop member 174 is inserted into the abutment groove, when the second power coupling member 150 rotates, the stop member 174 will be pushed out of the abutment groove under the action of the first guide portion 152 to release the abutment.

[0086] In this embodiment, an abutment groove is provided in the second power coupling member 150. When the operating lever 171 pushes the second power coupling member 150 to the second position, the second power coupling member 150 will stop rotating, and the end of the stop member 174 will correspond to the abutment groove. The stop member 174 will be inserted into the abutment groove under its own elastic deformation. At this time, since one side of the second power coupling member 150 is subjected to the elastic force of the second elastic member 173, and the other side is supported by the stop member 174, the forces on both sides are balanced, so the second power coupling member 150 remains stationary in the second position. In this application, a second guide part 154 is provided in the abutment groove. When the second transmission shaft 120 drives the second power coupling member 150 to rotate, the first guide part 152 can guide the stop member 174 outward to the outside of the abutment groove. Subsequently, one side of the second power coupling member 150 loses its contact restriction, while the other side is in a compressed and energy-storing state in the second elastic member 173. The second elastic member 173 then pushes the second power coupling member 150 from the second position to the first position, causing the second power coupling member 150 to couple the second drive shaft 120 and the third drive shaft 130, while simultaneously causing the operating lever 171 to push the first power coupling member 140 to move and disengage. The overall structure is simple, easy to implement, and consists entirely of mechanical components, resulting in greater stability.

[0087] Referring to Figures 1 to 5, in this embodiment, the stop 174 is made of an elastic metal sheet. The stop 174 includes a first, second, third, and fourth section that are bent and connected. The first and second sections are arranged perpendicularly. The first section is fixed to the support 183 of the housing 180 by bolts. The second section extends vertically towards the second power coupling member 150 and is located at the outer periphery of the second power coupling member 150. The third section is bent relative to the second section towards the second power coupling member 150. The fourth section is bent relative to the third section and is parallel to the second section. The fourth section has a shorter length, mainly to ensure that the applied force is axial. After the stop 174 is properly installed, it is in a pre-compressed state, and under the action of the restoring force, the fourth section will always abut against the outer periphery of the second power coupling member 150.

[0088] In this embodiment, the abutment groove is an annular groove 151. The annular groove 151 is recessed in the end face of the second power coupling member 150 and located at the outer periphery of the second power coupling member 150, with the outer side of the annular groove 151 penetrating through the outer periphery of the second power coupling member 150. A first guide portion 152 protrudes from the bottom wall of the annular groove 151, and a first guide surface 153 is formed on the outer side of the first guide portion 152. One end of the first guide surface 153 is connected to the side wall of the annular groove 151, and the other end extends outward to the outer periphery of the second power coupling member 150. In this way, the first guide surface 153 can stably guide the stop member 174, preventing the stop member 174 from being damaged due to the high-speed rotation of the second power coupling member 150.

[0089] In this embodiment, the bottom wall of the annular groove 151 has a protruding second guide portion 154, and the first guide portion 152 and the second guide portion 154 are circumferentially spaced apart in the annular groove 151. The sidewall of the first guide portion 152 forms a second guide surface 155, one end of which is connected to the sidewall of the annular groove 151, and the other end extends outward in a counterclockwise direction to the outer periphery of the second power coupling member 150. One end of the first guide surface 153 is connected to the sidewall of the annular groove 151, and the other end extends outward in a clockwise direction to the outer periphery of the second power coupling member 150. When the second power coupling member 150 is in the second position, the stop member 174 corresponds to the annular groove 151 and can be inserted into the annular groove 151.

[0090] This embodiment provides a first guide surface 153 and a second guide surface 155, ensuring that the stop 174 can move out of the abutment groove when the second power coupling member 150 rotates clockwise or counterclockwise. When the second power coupling member 150 rotates clockwise, since the stop 174 is stationary, it will be pushed out of the annular groove 151 by the action of the second guide surface 155. When the second power coupling member 150 rotates counterclockwise, since the stop 174 is stationary, it will be pushed out of the annular groove 151 by the action of the first guide surface 153.

[0091] Referring to Figures 1 to 5, in this embodiment, there are two stops 174, which are arranged opposite each other on both sides. That is, they are spaced 180° apart and are on the same circumference. This ensures stable force distribution.

[0092] Furthermore, a third guide surface 156 is formed on the sidewall of the first guide portion 152. One end of the third guide surface 156 is connected to the sidewall of the annular groove 151. The other end of the third guide surface 156 extends outward in a counterclockwise direction to the outer periphery of the second power coupling member 150 and is connected to the side of the first guide surface 153 extending to the outer periphery. A fourth guide surface 157 is also formed on the sidewall of the second guide portion 154. One end of the fourth guide surface 157 is connected to the sidewall of the annular groove 151. The other end of the fourth guide surface 157 extends outward in a clockwise direction to the outer periphery of the second power coupling member 150 and is connected to the side of the second guide surface 155 extending to the outer periphery.

[0093] In this embodiment, both the first guide portion 152 and the second guide portion 154 are guide bosses protruding from the bottom wall of the annular groove 151, and the two are spaced 180° apart. When the second power coupling member 150 rotates, the side wall of the guide boss will abut against the stop member 174, causing the stop member 174 to undergo elastic deformation in a direction away from the center of the second power coupling member 150.

[0094] In this embodiment, the depth of the annular groove 151 is greater than the height of the first guide portion 152 and the second guide portion 154, forming a three-tiered stepped surface on the end face of the second power coupling member 150. The first stepped surface 158 is the bottom wall of the annular groove 151, the second stepped surface 159 is the top surface of the first guide portion 152 and the second guide portion 154, and the third stepped surface 161 is the end face of the second power coupling member 150. The first stepped surface 158, the second stepped surface 159, and the third stepped surface 161 are arranged at intervals. The first guide surface 153, the second guide surface 155, the third guide surface 156, and the fourth guide surface 157 are all arc surfaces, with one end tangent to the side wall of the annular groove 151 in the circumferential direction, and the other end tangent to the outer periphery of the second power coupling member 150.

[0095] Of course, in other embodiments of this application, the first guide surface 153, the second guide surface 155, the third guide surface 156, and the fourth guide surface 157 may also be inclined surfaces, concave arc surfaces, concave arc surfaces, etc. This embodiment is not limited to only arc surfaces. Secondly, the shape and setting position of the abutment groove can also be adjusted adaptively. For example, the abutment groove can be set on the side of the second power coupling member 150, and guide surfaces can be set at both ends.

[0096] Referring to Figures 1 to 5, in this embodiment, a guide ring platform is provided on the outer periphery of the second power coupling member 150, with the guide ring platform being larger at the top and smaller at the bottom. The upper surface of the guide ring platform is the bottom wall of the annular groove 151. When the second power coupling member 150 moves from the first position to the second position, the side wall of the guide ring platform can apply an outward pushing force to the stop member 174, so that the stop member 174 deforms in the opposite direction to store force. When the end of the stop member 174 passes the guide ring platform, the stop member 174 can have a greater restoring force, thereby inserting into the annular groove 151.

[0097] In this embodiment, the power switching mechanism 100 further includes a pin 190. The sidewall of the second drive shaft 120 is radially provided with a through groove 121. The second power coupling member 150 is axially provided with a third through hole 162 and radially provided with a through pin hole 163. The second power coupling member 150 is movably mounted on the second drive shaft 120 through the third through hole 162. The pin 190 is sequentially inserted into the pin hole 163 and the groove 121, and can slide along the groove 121. The end of the operating rod 171 abuts against the pin 190.

[0098] In this embodiment, the pin 190 and the slide groove 121 can limit the movement position of the second power coupling member 150, and make it easier for the operating lever 171 to act on the second power coupling member 150.

[0099] Specifically, the slide groove 121 has a first end face 122 near the third drive shaft 130 and a second end face 123 away from the third drive shaft 130. The first end face 122 and the second end face 123 are two stop surfaces of the slide groove 121 to limit the sliding position of the second power coupling member 150. When the operating lever 171 pushes the pin 190 to move the second power coupling member 150 toward the third drive shaft 130 (i.e., when the second power coupling member 150 moves from the first position to the second position) until the pin 190 abuts against the second end face 123, the end of the stop member 174 passes over the second step surface 159 (the plane where the top surfaces of the first and second limiting parts are located), but does not pass over the third step surface 161 (i.e., the end face of the second power coupling member 150 near the third drive shaft 130). At this time, the stop member 174 will be inserted into the annular groove 151 under the action of its own restoring force. After releasing the operating lever 171, the second elastic element 173 will push the second power coupling element 150 to move in the opposite direction, and the end of the stop 174 will abut against the bottom wall (first step surface 158) of the annular groove 151 or the top surface (second abutment surface) of the first or second limiting part. The specific abutment position of the stop 174 needs to be determined according to the current angle of the second drive shaft 120. If the stop 174 corresponds to the first guide part 152 or the second guide part 154 when the operating lever 171 is pushed, the second power coupling element 150 will allow the stop 174 to abut against the top surface of the first guide part 152 or the second guide part 154 under the action of the second elastic element 173. If the stop 174 corresponds to the area between the first guide portion 152 and the second guide portion 154 when the operating lever 171 pushes the second power coupling member 150 to move, the second power coupling member 150 will cause the stop 174 to abut against the bottom wall of the annular groove 151 between the first guide portion 152 and the second guide portion 154 under the action of the second elastic member 173.

[0100] Setting a second contact surface can avoid the problem of the stop members 174 abutting against the end face of the second power coupling member 150 (i.e., the third step surface 161), thereby better realizing the release of the restriction of the stop members 174 by the rotation of the second power coupling member 150.

[0101] When the two stop members 174 respectively abut against the top surfaces of the first limiting part and the second limiting part, since the positions of the two stop members 174 correspond to the positions of the first guide part 152 and the second guide part 154, one stop member 174 will abut against the top surface of the first guide part 152, and the other will abut against the top surface of the second guide part 154. The movement of the second power coupling member 150 from the second position to the first position (i.e., the process of establishing coupling) will be divided into two processes, as follows:

[0102] The first process is as follows: The second drive shaft 120 rotates the second power coupling member 150. At this time, since the stop member 174 is fixed, the area between the first limiting part and the second limiting part of the second power coupling member 150 will rotate to correspond with the stop member 174, causing the two stop members 174 to disengage from the top surfaces of the first guide part 152 and the second guide part 154. Then, under the action of the second elastic member 173, the second power coupling member 150 will be pushed towards the first position, causing the end of the stop member 174 to abut against the bottom wall of the annular groove 151.

[0103] The second process is as follows: The second drive shaft 120 continues to rotate the second power coupling member 150. During the rotation, the two stop members 174 abut outward under the action of the outer walls of the first guide portion 152 and the second guide portion 154, causing the stop members 174 to deform and move out of the annular groove 151. Simultaneously, as the stop members 174 move out of the annular groove 151, the second power coupling member 150 moves towards the first position under the action of the second elastic member 173. When the second power coupling member 150 is in the first position, the pin 190 moves along the slide groove 121 to abut against the first contact surface. The first contact surface prevents the second power coupling member 150 from over-engaging with the third drive shaft 130.

[0104] When the two stop members 174 respectively abut against the bottom wall of the corresponding annular groove 151 between the first limiting part and the second limiting part, the second power coupling member 150 moves from the second position to the first position (i.e. the process of establishing coupling) only has the second process described above, and will not be repeated here.

[0105] The reason for setting the insertion slot, the first guide portion 152 and the second guide portion 154 in the above manner is to ensure that when the operating lever 171 pushes the second power coupling member 150 from the first position to the second position, the second power coupling member 150 can always abut against the stop member 174 regardless of the angle to which it rotates, and the abutment can be released by rotating the second power coupling member 150.

[0106] Secondly, it needs to be explained that the second position is one of the two positions opposite to the first position. The second position can be the position of the second power coupling member 150 when the stop member 174 abuts against the top surfaces of the first guide portion 152 and the second guide portion 154. Of course, the second position is also the position of the second power coupling member 150 when the stop member 174 abuts against the bottom wall of the annular groove 151. The specific second position is determined based on the abutment position.

[0107] Referring to Figures 1 to 5, in this embodiment, the second elastic element 173 is a spring, and the elastic force of the second elastic element 173 is greater than that of the first elastic element 172. This arrangement ensures that when the stop member 174 releases its stop, the elastic force of the second elastic element 173 can overcome the elastic force of the first elastic element 172 and simultaneously push the first power coupling member 140 and the second power coupling member 150 to move. The second elastic element 173 is sleeved on the outer periphery of the second transmission shaft 120, with one end abutting against the second power coupling member 150. A stop plate 124 is provided on the second transmission shaft 120 at the position corresponding to the other end of the second elastic element 173. The stop plate 124 rotates synchronously with the second transmission shaft 120, and the other end of the second elastic element 173 rotates with the stop plate.

[0108] The abutment plate 124 is provided to ensure that the second elastic element 173, the second drive shaft 120 and the second power coupling element 150 rotate synchronously, and to prevent the end of the second elastic element 173 away from the second power coupling element 150 from directly abutting the housing 180, thereby improving the service life of the second elastic element 173.

[0109] Referring to Figures 1 to 5, in this embodiment, the inner wall of the third through hole 162 is provided with an internal spline, while the outer periphery of the second drive shaft 120 is provided with an external spline. The second power coupling member 150 is movably mounted on the second drive shaft 120 through the engagement direction of the internal and external splines. This arrangement prevents the pin 190 from bending under torsional force, thus avoiding affecting the smoothness of the pin 190 sliding on the slide groove 121.

[0110] Furthermore, the third drive shaft 130 is provided with a meshing disc 132, and a fifth engagement structure 133 is provided at the end of the meshing disc 132 near the second drive shaft 120. A sixth engagement structure 164 is provided at the end of the second power coupling member 150 near the third drive shaft 130. When the second power coupling member 150 is in the first position, the fifth engagement structure 133 and the sixth engagement structure 164 are engaged; when the second power coupling member 150 is in the second position, the fifth engagement structure 133 and the sixth engagement structure 164 are disengaged.

[0111] In this embodiment, both the fifth fitting structure 133 and the sixth fitting structure 164 are multiple circumferentially spaced protrusions. A meshing groove is formed between two adjacent protrusions. The protrusions on the meshing plate can be inserted one-to-one into the meshing grooves on the end face of the second power coupling member 150, while the protrusions on the end face of the second power coupling member 150 can be inserted one-to-one into the meshing grooves on the meshing disc 132.

[0112] Referring to Figures 1 to 5, in this embodiment, the operating lever 171 includes a first operating lever 175 and a second operating lever 176. A contact ring is provided in the first through hole 111. The first operating lever 175 is provided with a limiting ring. The first operating lever 175 is inserted into the first through hole 111 via the inner side of the first drive shaft 110. The limiting ring and the contact ring cooperate to prevent the first operating lever 175 from dislodging from the first through hole 111. A first elastic member 172 is sleeved on the operating lever 171, with one end abutting against the limiting ring and the other end abutting against the first power coupling member 140. The second operating lever 176 passes through the second through hole 131, with one end abutting against the first power coupling member 140 and the other end abutting against the pin 190, thus preventing it from dislodging.

[0113] In this embodiment, the operating lever 171 is set to two ends, which makes assembly easier. Moreover, with this setting, the first operating lever 175 will not continue to rotate when the first power coupling member 140 is decoupled, thus making it safer.

[0114] In this embodiment, a stepped hole 142 is provided at the center of the first power coupling member 140, and the end of the second operating rod 176 is inserted into the stepped hole 142 and abuts against the step in the stepped hole 142, thereby ensuring the stability of the installation of the second operating rod 176.

[0115] In this embodiment, the power switching mechanism 100 can be used in such a way that when it is necessary to switch the input of the second drive shaft 120 to the first drive shaft 110, simply push the first operating lever 175 inward, making operation more convenient. When it is necessary to switch the input of the first drive shaft 110 to the second drive shaft 120, the power device connected to the second drive shaft 120 can be used to drive the second drive shaft 120 to rotate, achieving automatic switching without the need for manual switching.

[0116] It should also be noted that in some special application scenarios, the first drive shaft 110 and the second drive shaft 120 can also be used as output shafts, or the first drive shaft 110 can be used as an output shaft while the second drive shaft 120 can be used as an input shaft. The third drive shaft 130 can also be used as an output shaft or an input shaft as needed. Therefore, this embodiment does not limit the first drive shaft 110 and the second drive shaft 120 to be used only as input shafts, nor does it limit the third drive shaft 130 to be used only as an output shaft.

[0117] In summary, the power switching mechanism 100 provided in this embodiment of the invention provides a first power coupling member 140 between the first drive shaft 110 and the third drive shaft 130, and a second power coupling member 150 between the second drive shaft 120 and the third drive shaft 130. The power switching component 170 acts on the first power coupling member 140 and the second power coupling member 150. The power switching component 170 can simultaneously control the first power coupling member 140 and the second power coupling member 150 to achieve one of the first drive shaft 110 and the second drive shaft 120 with the third drive shaft 130. The overall structure is simple, and it can be achieved by operating the power switching component 170, making operation more convenient.

[0118] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A power switching mechanism, characterized in that, The system includes a first drive shaft (110), a second drive shaft (120), a third drive shaft (130), a first power coupling component (140), a second power coupling component (150), a power switching assembly (170), and a housing (180). The first drive shaft (110) and the second drive shaft (120) are rotatably mounted at both ends of the housing (180). The third drive shaft (130) is rotatably mounted on the housing (180) and located between the first drive shaft (110) and the second drive shaft (120). The two ends of the third drive shaft (130) are respectively spaced apart from the first drive shaft (110) and the second drive shaft (120). The first power coupling component (140) is disposed between the first drive shaft (110) and the third drive shaft (130). The second power coupling member (150) is disposed between the second drive shaft (120) and the third drive shaft (130); the power switching component (170) acts on the first power coupling member (140) and the second power coupling member (150), so that the first power coupling member (140) couples the first drive shaft (110) and the third drive shaft (130) or the second power coupling member (150) couples the second drive shaft (120) and the third drive shaft (130).

2. The power switching mechanism according to claim 1, characterized in that, The power switching assembly (170) includes an operating lever (171); the first power coupling member (140) is movably disposed between the first drive shaft (110) and the third drive shaft (130); The second power coupling member (150) is movably disposed between the second drive shaft (120) and the third drive shaft (130); the first drive shaft (110) is provided with a first through hole (111), and the third drive shaft (130) is provided with a second through hole (131); the operating lever (171) passes through the first through hole (111) and the second through hole (131), and one end of the operating lever (171) extends out from the end of the first drive shaft (110). (171) can act on the first power coupling member (140) and the second power coupling member (150); the operating lever (171) can drive the first power coupling member (140) and the second power coupling member (150) to move so that the first power coupling member (140) is coupled with both the first drive shaft (110) and the third drive shaft (130), and the second power coupling member (150) is decoupled from at least one of the second drive shaft (120) and the third drive shaft (130).

3. The power switching mechanism according to claim 2, characterized in that, The power switching assembly (170) further includes a first elastic element (172); the first elastic element (172) is disposed between the first power coupling element (140) and the first drive shaft (110), and the first elastic element (172) can provide elastic force to the first power coupling element (140) so that the first power coupling element (140) is kept in a coupled state with the first drive shaft (110) and the second drive shaft (120).

4. The power switching mechanism according to claim 3, characterized in that, The first power coupling member (140) is provided with a first fitting structure and a second fitting structure; the first transmission shaft (110) is provided with a third fitting structure that cooperates with the first fitting structure; the first power coupling member (140) is movably mounted on the first transmission shaft (110), and the first fitting structure is fitted with the third fitting structure; the first elastic member (172) is a spring, the first elastic member (172) is sleeved on the operating rod (171), and the two ends of the first elastic member (172) act on the first transmission shaft (110) and the first power coupling member (140) respectively; the third transmission shaft (130) is provided with a fourth fitting structure that cooperates with the second fitting structure; the operating rod (171) can drive the first power coupling member (140) to move towards the third transmission shaft (130), so that the second fitting structure will fit with the fourth fitting structure.

5. The power switching mechanism according to any one of claims 2-4, characterized in that, The power switching assembly (170) further includes a second elastic element (173) and a stop element (174); the second power coupling element (150) is movably mounted on and coupled to the second drive shaft (120), the second power coupling element (150) having a first position coupled to both the second drive shaft (120) and the third drive shaft (130) and a second position coupled to the second drive shaft (120) and separated from the third drive shaft (130); the second elastic element (173) is configured to provide a spring force to the second power coupling element (150) in the direction of the third drive shaft (130); the stop element (174) is disposed in the housing (180), and the operating lever (171) drives the second power coupling element (150). When moved to the second position, the stop (174) can abut against the second power coupling member (150) to restrict the second power coupling member (150) to the second position; the second drive shaft (120) drives the second power coupling member (150) to rotate, which can release the restriction of the stop (174) on the second power coupling member (150), so that the second elastic member (173) drives the second power coupling member (150) to move toward the first position; the movement of the second power coupling member (150) toward the first position can drive the operating lever (171) to move and drive the first power coupling member (140) to move, so that the first power coupling member (140) is decoupled from at least one of the first drive shaft (110) or the third drive shaft (130).

6. The power switching mechanism according to claim 5, characterized in that, The outer periphery of the second power coupling member (150) is provided with an abutment groove, and the abutment groove is provided with a first guide portion (152); the stop member (174) is elastic, one end of the stop member (174) is connected to the housing (180), and the other end extends toward the second power coupling member (150), and can deform in the radial direction of the second power coupling member (150); When the second power coupling member (150) moves to the second position, the stop member (174) can be inserted into the abutment groove under its own elastic force; when the stop member (174) is inserted into the abutment groove, when the second power coupling member (150) rotates, the stop member (174) will be pushed out of the abutment groove under the action of the first guide part (152) to release the abutment.

7. The power switching mechanism according to claim 6, characterized in that, The abutment groove is an annular groove (151), which is recessed on the end face of the second power coupling member (150) and located on the outer periphery of the second power coupling member (150). The outer side of the annular groove (151) penetrates the outer periphery of the second power coupling member (150). The first guide part (152) protrudes from the bottom wall of the annular groove (151), and the outer side of the first guide part (152) forms a first guide surface (153). One end of the first guide surface (153) is connected to the side wall of the annular groove (151), and the other end extends outward to the outer periphery of the second power coupling member (150).

8. The power switching mechanism according to claim 7, characterized in that, The bottom wall of the annular groove (151) is also provided with a second guide portion (154). The first guide portion (152) and the second guide portion (154) are circumferentially spaced in the annular groove (151). The side wall of the first guide portion (152) forms a second guide surface (155). One end of the second guide surface (155) is connected to the side wall of the annular groove (151), and the other end extends outward in a counterclockwise direction to the outer periphery of the second power coupling member (150). One end of the first guide surface (153) is connected to the side wall of the annular groove (151), and the other end extends outward in a clockwise direction to the outer periphery of the second power coupling member (150).

9. The power switching mechanism according to claim 5, characterized in that, The power switching mechanism further includes a pin (190); the side wall of the second drive shaft (120) is provided with a through groove (121) in the radial direction, the second power coupling member (150) is provided with a third through hole (162) in the axial direction, and a through pin hole (163) in the radial direction; the second power coupling member (150) is movably mounted on the second drive shaft (120) through the third through hole (162); the pin (190) is sequentially inserted into the pin hole (163) and the groove (121), and can slide along the groove (121); the end of the operating rod (171) abuts against the pin (190). Connect; and / or the third drive shaft (130) is provided with a meshing disc (132), the meshing disc (132) is provided with a fifth engagement structure (133) at one end near the second drive shaft (120), the second power coupling member (150) is provided with a sixth engagement structure (164) at one end near the third drive shaft (130), when the second power coupling member (150) is in the first position, the fifth engagement structure (133) and the sixth engagement structure (164) are engaged, and when the second power coupling member (150) is in the second position, the fifth engagement structure (133) and the sixth engagement structure (164) are separated.

10. The power switching mechanism according to any one of claims 2-4, characterized in that, The operating lever (171) includes a first operating lever (175) and a second operating lever (176); the first through hole (111) is provided with an abutting ring platform; the first operating lever (175) is provided with a limiting ring platform, and the first operating lever (175) is inserted into the first through hole (111) from the inner side of the first drive shaft (110). The limiting ring platform and the abutting ring platform cooperate to restrict the first operating lever (175) from coming out of the first through hole (111). The second operating lever (176) passes through the second through hole (131), and one end of the second operating lever (176) abuts against the first power coupling member (140), while the other end acts on the second power coupling member (150).

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