Valve core transmission component, valve controller, valve and valve control method

Abstract

The present invention discloses a valve core transmission component, a valve controller, a valve and a valve control method, including a driving gear and a main shaft, wherein the driving gear is used to drive the main shaft to rotate around the main shaft axis, the driving gear is an incomplete gear, and the driving gear can rotate relative to the main shaft around the main shaft axis. The valve controller and the valve are both based on the specific application of the valve core transmission component, and the control method is the same as the concept of the valve core transmission component. The adoption of this solution can not only improve the reliability of the valve transmission, but also facilitate the further miniaturization design of the valve.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control devices, and in particular to a valve core transmission component, a valve controller, a valve and a valve control method. Background Art

[0002] The valve components involved in fluid on-off control and fluid flow regulation generally include the valve itself and the driver connected to the valve stem. The driver powered by electricity generally includes a drive motor and a reducer. With the development of Internet of Things technology, the existing intelligent / smart metering equipment is generally equipped with a corresponding cut-off valve core to achieve remote and automated valve opening and closing control in situations such as exhaustion of available quantity, abnormal flow output emergency, and forced human intervention.

[0003] For example, a common water meter valve with an opening and closing valve core has a controller that generally uses a motor to drive a reduction gear set, which drives the valve core spindle to rotate, and a limit switch is set to control the rotation angle of the rotating spindle, thereby achieving the purpose of controlling the working state of the valve. At the same time, the technical solution of solving the rotation angle control problem by electrical control has the problems of high controller cost and relatively complex control logic, and the corresponding controller is not conducive to the overall miniaturization design of the valve assembly.

[0004] Furthermore, on the basis of the above scheme and as an optimized form with equivalent effect, the following solutions have emerged in the prior art: the technical solution provided by the utility model patent with patent number CN98241092.1 and name “Electronic Positioning Valve Actuator”; the technical solution provided by the utility model patent with patent number CN 200720078541.1 and name “A Micro-Power Motor Valve Spool”; the technical solution provided by the utility model patent with patent number CN200920032104.5 and name “A Bidirectional Non-Blocking Quick-Closing Electric Control Valve”.

[0005] Further optimization design of the structure of existing valve components is of great significance to the development of the industry and the specific application of valves. Summary of the invention

[0006] In view of the above-mentioned technical problem of further optimizing the structure of the existing valve assembly, which is of great significance to the development of the industry and the specific application of valves, the present invention provides a valve core transmission part, a valve controller, a valve and a valve control method. The valve controller and the valve are both based on the specific application of the valve core transmission part, and the control method is the same as the design concept of the valve core transmission part. The adoption of this solution can not only improve the reliability of the valve transmission, but also facilitate the further miniaturization design of the valve.

[0007] In response to the above problems, the valve core transmission component, valve controller, valve and valve control method provided by the present invention solve the problems through the following technical points: the valve core transmission component includes a driving gear and a main shaft, the driving gear is used to drive the main shaft to rotate around the main shaft axis, the driving gear is an incomplete gear, and the driving gear can rotate relative to the main shaft around the main shaft axis.

[0008] The valve core transmission provided in this solution can be used as a component of a valve controller, which is used to drive the valve core to change the opening and closing state and the opening state of the valve. The specific structural design of the valve core transmission is aimed at the problem of reset power that needs to be considered when the incomplete gear is disengaged from the tooth meshing state and then re-engaged in the subsequent tooth meshing in the existing small fluid valves that solve the problem of stalling through tooth transmission, so as to achieve: improving the reliability of tooth meshing reset and achieving the purpose of improving the reliability of valve transmission; by reducing the reset power requirement, achieving the purpose of facilitating further miniaturization of the valve design.

[0009] The specific application is particularly suitable for ball valve control, such as being used in ball valves, as valve core transmission parts and valve controllers of ball valves, such as being a component of IoT water meter valve components. However, as a person skilled in the art, this structural design is not limited to ball valves and the specific water meter valve application mentioned above: it can also be used in other fluid valve components.

[0010] In the specific structural design, the main shaft is subsequently used as the transmission shaft for driving the valve core, and the driving gear is used to drive the main shaft to rotate. The driving gear is designed as an incomplete gear, aiming to achieve the purpose of preventing the driving gear from blocking during the rotation process through hardware structural design.

[0011] Furthermore, in view of the following characteristics generally possessed by the existing valve anti-jamming design: existing in the design of miniaturized components, in order to achieve the above-mentioned meshing reliability and the purpose of miniaturized design, a technical solution is provided in which a driving gear can rotate relative to the main shaft. When this solution is used in practice, during the tooth meshing and resetting process, the driving gear rotates relative to the main shaft, so that the driving gear can rotate independently of the main shaft and the driving gear can rotate relative to the main shaft at a greater angle, thereby achieving: during the relative rotation process, the purpose of avoiding the rotation resistance of the valve core affecting or excessively affecting the tooth meshing and resetting of the driving gear due to the linkage between the valve core and the main shaft is avoided. Ultimately, the purpose is to improve the meshing reliability, reduce the power input required for the meshing and resetting of the driving gear teeth, and achieve the purpose of reducing the volume of the structure related to the application of this concept.

[0012] In specific applications, it is preferred to adopt the relative rotation as a realization method that the driving gear can rotate independently relative to the main shaft. For example, the above relative rotation is realized through a rotation gap. The rotation gap can adopt the scheme of key and keyway matching and boss and boss matching provided below. It can be understood that the rotation gap is used to provide the idle travel of the driving gear on the rotation trajectory when the key and keyway rotate relative to each other (before the key and keyway contact, before the boss and the corresponding boss contact). In addition to independent rotation relative to the main shaft, the following elastic member method is adopted, and the change of the deformation amount of the elastic member is utilized (as the driving gear rotates, the deformation amount of the elastic member needs to reach a certain degree to drive the main shaft to rotate). It can also be achieved: the driving gear rotates independently relative to the main shaft in the early stage, and the driving gear and the main shaft rotate in the later stage, and finally the purpose of relative rotation of the driving gear is achieved. Different from independent rotation, the method of using elastic members is actually for the driving gear to rotate with load. In specific applications, it can be reasonably selected according to the specific application scenario (such as the need to consider the fluid flow area on the valve when the valve is opened) and the specific structural form adopted.

[0013] As described above, the design features of this solution take into account the influence of the resistance existing when the main shaft rotates on the rotation of the drive gear to achieve tooth meshing reset. According to the existing valve opening and closing forms, this solution is particularly suitable for ball valve control, angle valve control, etc.

[0014] As a further technical solution for valve core transmission:

[0015] As a technical solution matching the existing conventional incomplete gear design and incomplete gear drive design, it is set as follows: the driving gear is coaxial with the main shaft, and the main shaft is rotatably connected to the driving gear through the shaft hole on the driving gear;

[0016] The main shaft and the driving gear are each provided with a rotation constraint body, and the rotation constraint body is used for torque transmission between the two: the driving gear transmits torque to the main shaft through mutual squeezing of the rotation constraint body. This solution adopts a rotation constraint body to realize torque transmission between the main shaft and the driving gear, and can specifically adopt the following key method and boss method. With this solution, an elastic member capable of storing energy when the driving gear rotates can realize subsequent engagement and reset of the driving gear teeth, that is, when the scheme is matched with the driving gear rotation scheme or the valve controller including the transmission member is obtained, the structure can be designed as a relatively simpler and smaller technical solution. However, as a person skilled in the art, the overall inventive concept is not limited to the above rotation constraint body scheme, such as: a complete gear coaxial with the incomplete gear is provided on the incomplete gear, the main shaft is the gear shaft, and the driving gear and the main shaft produce translation in the radial direction of the main shaft to achieve the engagement and disengagement of the complete gear and the main shaft teeth to achieve the purpose of relative rotation; the driving gear produces relative movement along the axis direction of the main shaft relative to the main shaft to achieve the purpose of relative rotation.

[0017] In the specific design, for the solution that can generate the above relative rotation by using the rotation gap, the realization of the general inventive concept only needs the rotation gap of the relative rotation: even if the relative rotation reaches the dead point position, the mechanical energy already possessed by the driving gear can be used to act on the main shaft to drive the main shaft to rotate, that is, even when the above dead point position is reached, it is not necessarily that the gear teeth on the driving gear have completed the tooth meshing and reset with the front end driving component. However, it is preferably set that when the above relative rotation dead point position is reached, the driving gear has completed the tooth meshing and reset with the front end driving component, so as to use the torque that can be generated by the gear transmission to directly act on the main shaft to complete the valve core driving.

[0018] As a specific solution to achieve the purpose of relative rotation based on the key matching clearance, it is set as follows: the rotation constraint on one of the two is a key, and the rotation constraint on the other is a keyway, and the width of the keyway is greater than the width of the key. For those skilled in the art, the difference between the width of the keyway and the width of the key is the width value of the rotation clearance.

[0019] As a further solution for achieving relative rotation based on key matching clearance, it is configured as follows: the key is provided on the main shaft, and the keyway is provided on the driving gear;

[0020] The depth of the keyway is less than the length of the shaft hole. Taking the ball valve drive on a common water meter as an example, the drive gear is generally a plastic part. In order to consider the problem of poor meshing accuracy between the drive gear and the front-end drive component caused by eccentric wear of the shaft hole on the drive gear, in this solution, the depth of the keyway is set to be less than the length of the shaft hole. In fact, it means: in the axial direction of the shaft hole, according to the influencing size of the keyway, the shaft hole is divided into at least two sections, which are completely matched with the cylindrical section of the main shaft and the special-shaped hole section connected to the keyway. By adopting this solution, the constraint of the cylindrical section on the main shaft can ensure the matching accuracy of the main shaft and the drive gear, so as to ensure the meshing accuracy of the drive gear and the front-end drive component.

[0021] At the same time, for those skilled in the art, the above key transmission scheme can also be set to a special-shaped shaft as the main shaft, the shaft hole on the driving gear that matches the main shaft is a special-shaped hole, and the matching sections of the special-shaped shaft and the special-shaped hole include matching sections with different cross-sectional forms, and the driving gear can achieve the purpose of relative rotation relative to the main shaft by obtaining a rotation gap on the matching section. However, it can be understood that the specific concept of this scheme is still to achieve the purpose of driving the main shaft by subjecting the key to shear stress, and the specific concept is equivalent to the above key transmission.

[0022] Furthermore, as mentioned above, in order to further solve the problem of eccentric wear by using the end face of the free end of the key to match the bottom of the keyway, it is set as follows: the bottom face of the keyway is an arcuate face whose axis is coaxial with the axis of the spindle, and the end face of the free end of the key is an arcuate face whose axis is coaxial with the axis of the spindle;

[0023] The groove bottom surface is in contact with the end surface.

[0024] Furthermore, as mentioned above, considering the eccentric wear problem, in order to avoid the eccentric wear problem caused by the deformation of the main shaft due to the bending moment when the main shaft is subjected to force, it is set as follows: the number of the keys and the keyways are both multiple;

[0025] The number of keys and keyways is equal;

[0026] The key and keyway form a key engagement working group one by one;

[0027] The multiple working groups formed are evenly distributed in an annular manner relative to the axis of the main shaft;

[0028] In the relative rotation process, multiple working groups are synchronously meshed or disengaged. In this solution, by adopting: the working groups are evenly distributed in an annular shape, and the working groups are synchronously meshed or disengaged, the bending deformation forces brought by each working group on the main shaft can be balanced, so as to avoid the main shaft from bending under the action of the driving gear, which ultimately leads to eccentric wear.

[0029] Different from the boss solution used below, since the key matching relationship can be completely located within the range of both ends of the driving gear, this key matching solution is more conducive to the small-size design of the transmission part.

[0030] As a technical solution based on a rotation constraint body and different from a key matching solution that is easier to process, the following is adopted: the rotation constraint body on the spindle is a boss arranged on the side of the spindle, and the number of bosses on the spindle is one or two;

[0031] When there are two bosses on the main shaft, the two bosses are located at the same axial position of the main shaft, and the two bosses are arranged at intervals in the circumferential direction of the main shaft;

[0032] When there are two bosses on the main shaft, the rotation restraining body on the driving gear is a boss arranged on the end face of the driving gear, and during the relative rotation, the boss on the driving gear can contact each boss on the main shaft;

[0033] When there is one boss on the main shaft, the rotation constraint body on the driving gear is two bosses arranged on the end surface of the driving gear, and during the relative rotation, the boss on the main shaft can contact each boss on the driving gear. In this solution, on one of the driving gear and the main shaft with two bosses, the angle on the main shaft circumference associated with the specific position of the two bosses on each side close to each other and the size of the distance between the left and right sides of the boss on the other determine the size of the rotation gap, that is, when the driving gear rotates relative to the main shaft until the boss on it contacts the boss on the main shaft, the relative rotation reaches the dead center position.

[0034] As a specific solution based on the elastic deformation of the elastic member, the relative rotation is determined by the deformation amount of the elastic member, which is set as follows: an elastic member is also provided between the main shaft and the driving gear, and the driving gear transmits torque to the main shaft through the elastic member, and the relative rotation is achieved through the elastic deformation of the elastic member. In this solution, when the driving gear needs to be re-engaged, the force driving the driving gear to rotate at this time needs to consider the elastic force from the driving gear itself and the elastic member, so relative to the direct rigidity of the main shaft acting on the driving gear, the purpose of reducing the driving gear rotation resistance can also be achieved.

[0035] As a technical solution matching the existing conventional incomplete gear design and incomplete gear drive design, it is configured as follows: the drive gear is coaxial with the main shaft, and the main shaft is clearance-matched with the drive gear through the shaft hole on the drive gear.

[0036] As a technical solution that facilitates the connection of elastic parts and is conducive to the miniaturization of the transmission part design, it is set as follows: the elastic part is a torsion spring sleeved on the main shaft, one end of the torsion spring is fixedly connected to the main shaft, and the other end is fixedly connected to the driving gear.

[0037] The present solution also discloses a valve controller, comprising a driving component and a valve core transmission member as described in any one of the above items, wherein the driving component drives the driving gear to rotate by meshing with the gear teeth on the driving gear;

[0038] During the period when the tooth meshing is maintained, the driving gear and the main shaft have a matching state in transmission matching;

[0039] During the process of resetting the tooth engagement after the tooth engagement is disengaged, the drive gear and the main shaft have a relatively rotatable matching state. This solution provides a specific application based on the above transmission member, and is specifically designed as follows: during the period when the tooth engagement is maintained, the drive gear and the main shaft have a matching state in transmission matching, which is intended to illustrate the matching state or relative position state between the drive gear and the driving component, so that the driving component can finally drive the main shaft to rotate under the tooth engagement; the specific design is as follows: during the process of resetting the tooth engagement after the tooth engagement is disengaged, the drive gear and the main shaft have a relatively rotatable matching state, which is intended to illustrate the matching state or relative position state between the drive gear and the driving component, so that during the entire process or early stage of resetting the tooth engagement, the drive gear can rotate relative to the main shaft to reduce the driving force required for resetting the drive gear tooth engagement.

[0040] As a further technical solution of the valve controller:

[0041] As a technical solution that can minimize the driving force required for resetting the driving gear by idling the driving gear throughout the entire process of resetting the driving gear teeth, it is set as follows: during the process of resetting the tooth engagement after the tooth engagement is disengaged, the driving gear and the main shaft are in a relatively rotatable matching state. In this solution, the corresponding purpose can be achieved according to the specific size of the gear teeth on the driving gear and the size of the rotation gap. For example, in the circumferential direction of the driving gear, the rotation gap is greater than the tooth thickness of the gear teeth on the driving gear (the tooth thickness of the standard basic rack gear teeth). Preferably, considering the efficiency of the multiple meshing, it can also be further relaxed to be equal to the tooth thickness at the tooth tip position (the tooth thickness at the tooth tip circle position).

[0042] In view of the plastic material design of the driving gear proposed above, further, in order to optimize the wear problem of the gear teeth at the upper end of the driving gear, it is further configured as follows: the driving gear has a plurality of gear teeth;

[0043] The matching relationship between the driving component and the driving gear satisfies that, in any rotation direction of the driving gear, when the teeth are disengaged and the teeth are reset, the driving gear and the main shaft are in a relatively rotatable matching state when the first teeth on the driving component are reset. In this solution, when the first teeth complete the teeth engagement with the driving component, the driving gear is restored to a state where it can rotate to provide driving force for the main shaft.

[0044] In order to reduce the size of the power source such as the motor on the controller and reduce the dependence on the matching power supply, it is set as follows: the driving component includes a reduction gear set, and the driving gear is used to mesh with the final gear of the reduction gear set. This solution provides a solution based on its reduction gearbox.

[0045] More perfect, in order to make the controller include a power source for realizing the re-engagement of the driving gear, it is configured to: also include a power component for realizing the reset of the tooth engagement between the driving gear and the driving component.

[0046] As a technical solution for achieving the purpose of driving gear multiple meshing by utilizing the energy stored in the power component under the power of the driving component, so as to optimize the complexity of the controller structure, optimize the complexity of the controller action control, and improve the reliability of the controller, it is set as follows: the power component is an elastic limiter;

[0047] The elastic stopper stores energy during the rotation of the drive gear, and during the tooth meshing reset process, the elastic stopper drives the drive gear to rotate by rebounding to achieve tooth meshing reset. With the same effect as this solution, a separate driving mechanism can also be used to achieve the re-engagement of the drive gear and the drive component.

[0048] As a specific implementation form of the elastic limiting body, it is set as follows: the elastic limiting body is any one or more of the following forms: a spring, an elastic rope, an elastic rod;

[0049] The elastic rope is: one end is connected to the driving gear, and the other end is connected to the housing of the driving component. The elastic rope is stretched to store energy. For the application based on the gearbox, the elastic rope can be: one end is fixed to the driving gear, and the other end is fixed to the gearbox seat of the gearbox. The specific position can be, for example, located on the end cover of the gearbox;

[0050] The spring and the elastic rod are both: one end is constrained to one of the driving gear and the housing, and the other end is constrained to the other to store energy. For the application based on the gearbox, the spring and the elastic rod can be: one end acts on the driving gear, and the other end acts on the housing of the gearbox. The specific position can be used to act on the end cover. The specific action form can be: one end of the spring and the elastic rod is directly fixedly connected to the gearbox or the driving gear, and the contact surface is squeezed to transmit the action force, and the other end of the spring and the elastic rod is directly fixedly connected to the gearbox or the driving gear, and the contact surface is squeezed to transmit the action force.

[0051] In order to adapt to the miniaturized design of the controller structure, as a specific implementation mode of the elastic limiter, it is set as follows: the elastic limiter includes an elastic rod, and the elastic rod is a bent rod with a bend thereon;

[0052] The rod segments at both ends of the bend are defined as a first rod segment and a second rod segment, one end of the first rod segment is fixed on the driving gear, and in the radial direction of the driving gear, the two ends of the first rod segment are located at different positions of the driving gear, and the free end of the second rod segment protrudes outward relative to the end surface of the driving gear;

[0053] The end plate of the housing is also provided with a rotation limit groove, and the second rod segment is partially embedded in the rotation limit groove. In this solution, the elastic rod serves as a swing rod that rotates synchronously with the driving gear. When the swing is such that the rod segment of the second rod segment embedded in the rotation limit groove contacts the end surface of the rotation limit groove, the elastic member is stored with further rotation of the driving gear. With respect to the specific rotation direction of the driving gear, the rod segment of the second rod segment embedded in the rotation limit groove contacts the end portion of the corresponding side of the rotation limit groove, and the elastic member is stored with further rotation of the driving gear.

[0054] In order to further consider the miniaturization design of the controller, more specifically, it is set as follows: the driving gear is also provided with a groove extending along the radial direction of the driving gear, the first rod segment is fixed to one end of the groove close to the main shaft, the first rod segment is in the same extension direction as the groove in the free state, and both sides of the first rod segment and the side wall of the groove have a swing gap. In this scheme, the elastic member is set as a cantilever rod located in the space occupied by the driving gear to achieve the purpose of optimizing space occupancy. Further, considering the processing quality and avoiding the interchangeability problem between controllers caused by the installation of the cantilever rod, it is set that the elastic rod and the driving gear are designed as an integrated structure, such as preparing the integrated structure by one-time injection molding, and obtaining the elastic rod as a cantilever rod by gap processing of the obtained structure after injection molding. As a technician in this field, considering the angle of relative rotation, it is sufficient to set the corresponding gap width. Considering the material of the driving gear, in order to meet the requirement that the elastic rod produces elastic deformation within the required relative rotation range, it is sufficient to select an appropriate length of the first rod segment.

[0055] At the same time, as a technician in this field, the length direction of the first rod segment is set along the radial direction of the driving gear, which is intended to ensure that the elastic part has equal resistance to deformation during the forward and reverse rotation of the driving gear, but the form and extension direction of the first rod segment are not limited to the proposed radial direction of the driving gear.

[0056] In order to optimize the force on the elastic rod and avoid the reliability or life of the controller being reduced due to stress concentration at the connection end of the first rod segment, it is configured as follows: the side walls on both sides of the groove are provided with a protrusion located between the two ends of the first rod segment;

[0057] When the first rod segment is in a free state, there is a gap between the side walls of each side of the first rod segment and the free end of the side protrusion. In this solution, the middle / continuous section of the first rod segment is in contact with the end of the protrusion, so as to optimize the force on the connecting end of the first rod segment. More completely, the shape of the end face of the free end of the protrusion is set to be an arc surface with a smooth transition to both sides of the protrusion in the inner and outer directions of the driving gear, so as to avoid serious pressure loss on the protrusion and the first rod segment.

[0058] The present solution also discloses a valve, including a valve core that adjusts the valve opening state by rotation, and also including a valve core transmission member or a valve controller as described in any one of the above, wherein the valve core is fixed on a main shaft, and the main shaft serves as a valve stem of the valve core. The present valve is based on the use of the valve core transmission member or the valve controller. As described above, the present valve not only solves the problem of stalling through structural design, but also aims at the multiple meshing of the driving gear. The structural design of the present solution also has the characteristics of improving the reliability of the valve transmission and facilitating further miniaturization of the valve.

[0059] The present invention also discloses a valve control method, which is used for the following valve: the valve realizes valve on-off control by rotating the valve core, and the valve stem is driven to rotate by an incomplete gear to drive the valve core to move, and the incomplete gear can rotate relative to the valve stem around the valve stem axis;

[0060] The control method is as follows: before the valve stem performs a reversing rotation, the incomplete gear performs a relative rotation relative to the valve stem around the valve stem axis;

[0061] Through the relative rotation, when the incomplete gear is meshed and reset with the gear teeth used to drive the incomplete gear to rotate, the incomplete gear provides torque to the valve stem to drive the valve core to rotate. This control method is a valve control method based on the above structural design concept. Based on the application of anti-jamming valve drive, this solution provides a technical solution that can easily realize the multiple meshing of the drive gear teeth, improve the meshing reliability, reduce the structural volume and performance requirements of the corresponding hardware parts, and reduce the overall structural complexity of the valve.

[0062] The present invention has the following beneficial effects:

[0063] The present invention provides a valve core transmission component, a valve controller, a valve and a valve control method.

[0064] In the specific structural design of the valve core transmission component, the main shaft is subsequently used as the transmission shaft for driving the valve core, and the driving gear is used to drive the main shaft to rotate. The driving gear is designed as an incomplete gear, aiming to enable the driving gear to achieve the purpose of preventing rotation jams through hardware structural design during the rotation process.

[0065] Furthermore, in view of the following characteristics generally possessed by the existing valve anti-jamming design: existing in the design of miniaturized components, in order to achieve the above-mentioned meshing reliability and the purpose of miniaturized design, a technical solution is provided in which a driving gear can rotate relative to the main shaft. When this solution is used in practice, during the tooth meshing and resetting process, the driving gear rotates relative to the main shaft, so that the driving gear can rotate independently of the main shaft and the driving gear can rotate relative to the main shaft at a greater angle, thereby achieving: during the relative rotation process, the purpose of avoiding the rotation resistance of the valve core affecting or excessively affecting the tooth meshing and resetting of the driving gear due to the linkage between the valve core and the main shaft is avoided. Ultimately, the purpose is to improve the meshing reliability, reduce the power input required for the meshing and resetting of the driving gear teeth, and achieve the purpose of reducing the volume of the structure related to the application of this concept.

[0066] The valve controller and valve are based on the specific application of the valve core transmission component, and adopt the corresponding solution provided by this solution, which is convenient for realizing the simplified design and miniaturized design of the corresponding structure and optimizing the reliability of the complex meshing of the driving gear.

[0067] The valve control method is a specific valve control method that matches the above valve transmission component, valve controller, and valve structure design concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 This is a structural schematic diagram of a specific embodiment of the valve controller described in this solution, which is a structural explosion diagram;

[0069] Figure 2 It is a structural schematic diagram of a specific embodiment of the valve controller described in this scheme, and the schematic diagram is a top view;

[0070] Figure 3 It is a structural schematic diagram of a specific embodiment of the valve controller described in this scheme, which is a bottom view with a partial cross-section of the gearbox part;

[0071] Figure 4 This is a schematic diagram of the structure of a specific embodiment of the valve controller described in this solution, which is a top view, wherein the housing of the gearbox is omitted in the schematic diagram;

[0072] Figure 5 This is a structural schematic diagram of a specific embodiment of the valve controller described in this solution, which is a three-dimensional structural schematic diagram.

[0073] The reference numerals in the accompanying drawings are: 1, motor, 2, gearbox seat, 3, driving gear, 4, main shaft, 5, gearbox cover, 6, final gear, 7, reduction gear set, 8, rotation gap, 9, elastic limiter, 10, rotation limit groove, 11, groove, 12, protrusion. DETAILED DESCRIPTION

[0074] The present invention is further described in detail below in conjunction with embodiments, but the present invention is not limited to the following embodiments:

[0075] Embodiment 1:

[0076] like Figures 1 to 5 As shown, it includes a driving gear 3 and a main shaft 4. The driving gear 3 is used to drive the main shaft 4 to rotate around the axis of the main shaft 4. The driving gear 3 is an incomplete gear. The driving gear 3 can rotate relative to the main shaft 4 around the axis of the main shaft 4.

[0077] The valve core transmission provided in this solution can be used as a component of a valve controller, which is used to drive the valve core to change the opening and closing state and the opening state of the valve. The specific structural design of the valve core transmission is aimed at the problem of reset power that needs to be considered when the incomplete gear is disengaged from the tooth meshing state and then re-engaged in the subsequent tooth meshing in the existing small fluid valves that solve the problem of stalling through tooth transmission, so as to achieve: improving the reliability of tooth meshing reset and achieving the purpose of improving the reliability of valve transmission; by reducing the reset power requirement, achieving the purpose of facilitating further miniaturization of the valve design.

[0078] The specific application is particularly suitable for ball valve control, such as being used in ball valves, as valve core transmission parts and valve controllers of ball valves, such as being a component of IoT water meter valve components. However, as a person skilled in the art, this structural design is not limited to ball valves and the specific water meter valve application mentioned above: it can also be used in other fluid valve components.

[0079] In the specific structural design, the main shaft 4 is subsequently used as a transmission shaft for driving the valve core, and the driving gear 3 is used to drive the main shaft 4 to rotate. The driving gear 3 is designed as an incomplete gear, aiming to enable the driving gear 3 to achieve the purpose of preventing rotation jams through hardware structural design during the rotation process.

[0080] Furthermore, in view of the following characteristics of the existing valve anti-blocking design: existing in the design of miniaturized components, in order to achieve the above-mentioned meshing reliability and the purpose of miniaturized design, a technical solution is provided in which the drive gear 3 can rotate relative to the main shaft 4. When this solution is used in practice, during the tooth meshing reset process, the drive gear 3 rotates relative to the main shaft 4, so that the drive gear 3 can rotate independently of the main shaft 4 and the drive gear 3 can rotate relative to the main shaft 4 at a greater angle, thereby achieving: during the relative rotation process, the purpose of avoiding the rotation resistance of the valve core due to the linkage between the valve core and the main shaft 4 affecting or excessively affecting the tooth meshing reset of the drive gear 3. Ultimately, the purpose of improving the meshing reliability and reducing the power input required for the tooth meshing reset of the drive gear 3 is achieved, thereby achieving the purpose of reducing the volume of the structure related to the application of this concept.

[0081] In specific application, it is preferred to adopt the relative rotation as a realization mode that the driving gear 3 can rotate independently relative to the main shaft 4. For example, the relative rotation is realized by the rotation gap 8. The rotation gap 8 can adopt the scheme of key and keyway matching and boss and boss matching provided below. It can be understood that the rotation gap 8 is used to provide the idle travel of the driving gear 3 on the rotation trajectory when the key and keyway rotate relative to each other (before the key and keyway contact, before the boss and the corresponding boss contact). In addition to the independent rotation relative to the main shaft 4, the following elastic member method is adopted, and the change of the deformation amount of the elastic member is utilized (as the driving gear 3 rotates, the deformation amount of the elastic member needs to reach a certain degree to drive the main shaft 4 to rotate), which can also be realized: the driving gear 3 rotates independently relative to the main shaft 4 in the early stage, and the driving gear 3 and the main shaft 4 rotate in the later stage, and finally the purpose of relative rotation of the driving gear 3 is achieved. Different from independent rotation, the method of using elastic members is actually for the driving gear 3 to rotate with load. In specific application, it can be reasonably selected according to the specific application scenario (such as the need to consider the fluid flow area on the valve when the valve is opened) and the specific structural form adopted.

[0082] As described above, the design features of this solution take into account the influence of the resistance existing when the main shaft 4 rotates on the rotation of the drive gear 3 to achieve tooth meshing reset. According to the existing valve opening and closing forms, this solution is particularly suitable for ball valve control, angle valve control, etc.

[0083] Embodiment 2:

[0084] This embodiment is further refined and optimized based on the embodiment 1:

[0085] As a technical solution matching the existing conventional incomplete gear design and incomplete gear drive design, it is configured as follows: the driving gear 3 is coaxial with the main shaft 4, and the main shaft 4 is rotatably connected to the driving gear 3 through the shaft hole on the driving gear 3;

[0086] The main shaft 4 and the driving gear 3 are each provided with a rotation constraint body, and the rotation constraint body is used for torque transmission between the two: the driving gear 3 transmits torque to the main shaft 4 through mutual compression of the rotation constraint body. This scheme adopts a rotation constraint body to realize torque transmission between the main shaft 4 and the driving gear 3, and can specifically adopt the following key method and boss method. With this scheme, an elastic member capable of storing energy when the driving gear 3 rotates can realize subsequent tooth meshing reset of the driving gear 3, that is, when the scheme is matched with the driving gear 3 rotation scheme or the valve controller including the transmission member is obtained, the structure can be designed as a relatively simpler and smaller technical scheme. However, as a person skilled in the art, the overall inventive concept is not limited to the above rotation constraint body scheme, such as: a complete gear coaxial with the incomplete gear is provided on the incomplete gear, the main shaft 4 is the gear shaft, and the driving gear 3 and the main shaft 4 are translated in the radial direction of the main shaft 4 to realize the complete gear and the main shaft 4 teeth meshing disengagement to achieve the purpose of relative rotation; the driving gear 3 is relative to the main shaft 4. The main shaft 4 is the gear shaft, and the main shaft 4 is the gear shaft. The main shaft 4 is the gear shaft, and the main shaft 4 is the gear shaft. The gear shaft is disengaged from the gear shaft 4 by the translation of the driving gear 3 and the main shaft 4 in the radial direction of the main shaft 4 to achieve the purpose of relative rotation; the driving gear 3 is relative to the main shaft 4. The main shaft 4 generates a relative movement along the axis direction of the main shaft 4 to achieve the purpose of relative rotation.

[0087] In the specific design, for the solution that can generate the above relative rotation by using the rotation gap 8, the realization of the general inventive concept only needs the rotation gap 8 for relative rotation: even if the relative rotation reaches the dead point, the mechanical energy already possessed by the driving gear 3 can be used to act on the main shaft 4 to drive the main shaft 4 to rotate, that is, even when the above dead point is reached, it is not necessarily that the gear teeth on the driving gear 3 have completed the tooth meshing and reset with the front end driving component. However, it is preferably set that when the above relative rotation dead point is reached, the driving gear 3 has completed the tooth meshing and reset with the front end driving component, so as to use the torque generated by the tooth transmission to directly act on the main shaft 4 to complete the valve core driving.

[0088] Embodiment 3:

[0089] This embodiment is further refined and optimized based on Embodiment 2:

[0090] As a specific solution for achieving relative rotation based on the key matching clearance, it is set as follows: the rotation constraint on one of the two is a key, and the rotation constraint on the other is a keyway, and the width of the keyway is greater than the width of the key. For those skilled in the art, the difference between the width of the keyway and the width of the key is the width value of the rotation clearance 8.

[0091] As a further solution to achieve relative rotation based on key matching clearance, it is set as follows: the key is set on the main shaft 4, and the keyway is set on the driving gear 3;

[0092] The depth of the keyway is less than the length of the shaft hole. Taking the ball valve drive on a common water meter as an example, the drive gear 3 is generally a plastic part. In order to consider the problem of poor meshing accuracy between the drive gear 3 and the front-end drive component caused by eccentric wear of the shaft hole on the drive gear 3, in this solution, the depth of the keyway is set to be less than the length of the shaft hole. In fact, it means: in the axial direction of the shaft hole, according to the influencing size of the keyway, the shaft hole is divided into at least two sections, which are completely matched with the cylindrical section of the main shaft 4 and the special-shaped hole section connected to the keyway. By adopting this solution, the constraint of the cylindrical section on the main shaft 4 can ensure the matching accuracy of the main shaft 4 and the drive gear 3, so as to ensure the meshing accuracy of the teeth of the drive gear 3 and the front-end drive component.

[0093] At the same time, as those skilled in the art, for the above key transmission scheme, it can also be set that the main shaft 4 is a special-shaped shaft, the shaft hole on the driving gear 3 that matches the main shaft 4 is a special-shaped hole, and the matching sections of the special-shaped shaft and the special-shaped hole include matching sections with different cross-sectional forms, and the driving gear 3 can achieve the purpose of relative rotation relative to the main shaft 4 by obtaining a rotation gap 8 on the matching section. However, it can be understood that the specific concept of this scheme is still to achieve the purpose of driving the main shaft 4 by subjecting the key to shear stress, and the specific concept is equivalent to the above key transmission.

[0094] Furthermore, as mentioned above, in order to further solve the problem of eccentric wear by using the end face of the free end of the key to match the bottom of the keyway, it is set as follows: the bottom face of the keyway is an arcuate face whose axis is coaxial with the axis of the main shaft 4, and the end face of the free end of the key is an arcuate face whose axis is coaxial with the axis of the main shaft 4;

[0095] The groove bottom surface is in contact with the end surface.

[0096] Furthermore, as mentioned above, considering the eccentric wear problem, in order to avoid the eccentric wear problem caused by the deformation of the main shaft 4 due to the bending moment when the main shaft 4 is subjected to force, it is set as follows: the number of the key and the keyway is multiple;

[0097] The number of keys and keyways is equal;

[0098] The key and keyway form a key engagement working group one by one;

[0099] The multiple working groups formed are evenly distributed in an annular manner relative to the axis of the main shaft 4;

[0100] In the relative rotation process, multiple working groups are synchronously meshed or disengaged. In this solution, by adopting: the working groups are evenly distributed in an annular shape, and the working groups are synchronously meshed or disengaged, the bending deformation forces brought by each working group on the main shaft 4 can be balanced, so as to avoid the main shaft 4 from bending under the action of the driving gear 3, and finally causing eccentric wear.

[0101] Different from the boss solution adopted below, since the key matching relationship can be completely located within the range of both ends of the driving gear 3, this key matching solution is more conducive to the small-size design of the transmission part.

[0102] Embodiment 4:

[0103] This embodiment is further refined and optimized based on Embodiment 2:

[0104] As a technical solution based on a rotation constraint body and different from the key matching solution, which is easier to process, it is adopted that: the rotation constraint body on the main shaft 4 is a boss arranged on the side of the main shaft 4, and the boss on the main shaft 4 is one or two;

[0105] When there are two bosses on the main shaft 4, the two bosses are located at the same axial position of the main shaft 4, and the two bosses are arranged at intervals in the circumferential direction of the main shaft 4;

[0106] When there are two bosses on the main shaft 4, the rotation restraining body on the driving gear 3 is a boss arranged on the end surface of the driving gear 3. During the relative rotation, the boss on the driving gear 3 can contact with each boss on the main shaft 4.

[0107] When there is one boss on the main shaft 4, the rotation constraint body on the driving gear 3 is two bosses arranged on the end surface of the driving gear 3. During the relative rotation, the boss on the main shaft 4 can contact each boss on the driving gear 3. In this solution, on one of the driving gear 3 and the main shaft 4 with two bosses, the angle on the circumference of the main shaft 4 associated with the specific position of the two bosses on each side close to each other and the size of the distance between the left and right sides of the boss on the other determine the size of the rotation gap 8, that is, when the driving gear 3 rotates relative to the main shaft 4 until the boss on it contacts the boss on the main shaft 4, the relative rotation reaches the dead center position at this time.

[0108] Embodiment 5:

[0109] This embodiment is further refined and optimized based on Embodiment 2:

[0110] As a specific solution based on the elastic deformation of the elastic member, the relative rotation is determined by the deformation amount of the elastic member, which is set as follows: an elastic member is also provided between the main shaft 4 and the driving gear 3, and the driving gear 3 transmits torque to the main shaft 4 through the elastic member, and the relative rotation is achieved through the elastic deformation of the elastic member. In this solution, when the driving gear 3 needs to be reset for tooth meshing, the force driving the driving gear 3 to rotate at this time needs to consider the elastic force from the driving gear 3 itself and the elastic member, so relative to the main shaft 4 directly acting rigidly on the driving gear 3, the purpose of reducing the rotation resistance of the driving gear 3 can also be achieved.

[0111] As a technical solution matching the existing conventional incomplete gear design and incomplete gear drive design, it is configured as follows: the drive gear 3 is coaxial with the main shaft 4, and the main shaft 4 is clearance-matched with the drive gear 3 through the shaft hole on the drive gear 3.

[0112] As a technical solution that facilitates the connection of elastic parts and is conducive to the miniaturization of the transmission part design, it is set as follows: the elastic part is a torsion spring sleeved on the main shaft 4, one end of the torsion spring is fixedly connected to the main shaft 4, and the other end is fixedly connected to the driving gear 3.

[0113] Embodiment 6:

[0114] Based on the embodiment 1, this embodiment provides a valve controller, including a driving component and a valve core transmission component as described above, wherein the driving component drives the driving gear 3 to rotate by meshing with the gear teeth on the driving gear 3;

[0115] During the period when the tooth meshing is maintained, the driving gear 3 and the main shaft 4 have a matching state in transmission matching;

[0116] In the process of resetting the tooth engagement after the tooth engagement is disengaged, the drive gear 3 and the main shaft 4 have a relatively rotatable matching state. This scheme provides a specific application based on the above transmission member, and is specifically designed as follows: during the period when the tooth engagement is maintained, the drive gear 3 and the main shaft 4 have a matching state in transmission matching, which is intended to illustrate the matching state or relative position state between the drive gear 3 and the driving component, so that the driving component can finally drive the main shaft 4 to rotate under the tooth engagement; the specific design is as follows: in the process of resetting the tooth engagement after the tooth engagement is disengaged, the drive gear 3 and the main shaft 4 have a relatively rotatable matching state, which is intended to illustrate the matching state or relative position state between the drive gear 3 and the driving component, so that in the entire process or early stage of the tooth engagement resetting, the drive gear 3 can rotate relative to the main shaft 4 to reduce the driving force required for the tooth engagement resetting of the drive gear 3.

[0117] Embodiment 7:

[0118] This embodiment is further refined and optimized based on Embodiment 6:

[0119] As a technical solution that can minimize the driving force required for resetting the drive gear 3 by idling the drive gear 3 throughout the entire process of the tooth meshing reset of the drive gear 3, it is set as follows: during the process of tooth meshing reset after the tooth meshing is disengaged, the drive gear 3 and the main shaft 4 are in a relatively rotatable matching state. In this solution, the corresponding purpose can be achieved according to the specific size of the gear teeth on the drive gear 3 and the size of the rotation gap 8. For example, in the circumferential direction of the drive gear 3, the rotation gap 8 is greater than the tooth thickness of the gear teeth on the drive gear 3 (the tooth thickness of the standard basic rack gear teeth). Preferably, considering the efficiency of the multiple meshing, it can also be further relaxed to be equal to the tooth thickness at the tooth tip position (the tooth thickness at the tooth tip circle position).

[0120] Preferably, with respect to the plastic material design of the driving gear 3 as mentioned above, further, in order to optimize the wear problem of the gear teeth at the upper end of the driving gear 3, it is further configured as follows: the driving gear 3 has a plurality of gear teeth;

[0121] The matching relationship between the driving component and the driving gear 3 satisfies that: in any rotation direction of the driving gear 3, when the teeth are disengaged and the teeth are reset, the driving gear 3 and the main shaft 4 are in a relatively rotatable matching state when the first teeth on the driving component are reset. In this solution, when the first teeth complete the teeth engagement with the driving component, the driving gear 3 is restored to a state where it can rotate to provide driving force for the main shaft 4.

[0122] Preferably, in order to reduce the size of the power source on the controller, such as the motor 1, and reduce the dependence on the matching power supply, it is configured as follows: the driving component includes a reduction gear set 7, and the driving gear 3 is used to mesh with the final gear 6 of the reduction gear set 7. This solution provides a solution based on its reduction gearbox.

[0123] More perfect, in order to make the controller include a power source for realizing the multiple meshing of the driving gear 3, it is configured to also include a power component for realizing the reset of the meshing between the driving gear 3 and the driving component.

[0124] Preferably, as a technical solution for achieving the purpose of multiple meshing of the driving gear 3 by utilizing the energy storage of the power component under the power of the driving component, so as to optimize the complexity of the controller structure, optimize the complexity of the controller action control, and improve the reliability of the controller, it is set as follows: the power component is an elastic limiter 9;

[0125] The elastic stopper 9 stores energy during the rotation of the drive gear 3. During the tooth meshing reset process, the elastic stopper 9 drives the drive gear 3 to rotate by rebounding to achieve tooth meshing reset. With the same effect as this solution, a separate driving mechanism can also be used to achieve the re-engagement of the drive gear 3 and the drive component.

[0126] As a specific implementation form of the elastic limiting body 9, it is set as follows: the elastic limiting body 9 is any one or more of the following forms: a spring, an elastic rope, an elastic rod;

[0127] The elastic rope is: one end is connected to the driving gear 3, and the other end is connected to the housing of the driving component. The elastic rope is stretched to store energy. For the application based on the gearbox, the elastic rope can be: one end is fixed to the driving gear 3, and the other end is fixed to the gearbox seat 2 of the gearbox. The specific position can be, for example, located on the end cover of the gearbox;

[0128] The spring and the elastic rod are both: one end is constrained to one of the driving gear 3 and the housing, and the other end is constrained to the other to store energy. For the use based on the gearbox, the spring and the elastic rod can be: one end acts on the driving gear 3, and the other end acts on the housing of the gearbox. The specific position can be used to act on the end cover. The specific action form can be: one end of the spring and the elastic rod is directly fixedly connected to the gearbox or the driving gear 3, and the contact surface is squeezed to transmit the force, and the other end of the spring and the elastic rod is directly fixedly connected to the gearbox or the driving gear 3, and the contact surface is squeezed to transmit the force.

[0129] In order to adapt to the miniaturized design of the controller structure, as a specific implementation mode of the elastic limiter 9, it is set as follows: the elastic limiter 9 includes an elastic rod, and the elastic rod is a bent rod with a bend thereon;

[0130] The rod segments at both ends of the bend are defined as a first rod segment and a second rod segment, one end of the first rod segment is fixed on the driving gear 3, and in the radial direction of the driving gear 3, the two ends of the first rod segment are located at different positions of the driving gear 3, and the free end of the second rod segment protrudes outward relative to the end surface of the driving gear 3;

[0131] The end plate of the housing is also provided with a rotation limit groove 10, and the second rod segment is partially embedded in the rotation limit groove 10. In this solution, the elastic rod serves as a swing rod that rotates synchronously with the driving gear 3. When the second rod segment is swung to the point where the rod segment embedded in the rotation limit groove 10 contacts the end surface of the rotation limit groove 10, the elastic member is stored in energy under the further rotation of the driving gear 3. With respect to the specific rotation direction of the driving gear 3, the second rod segment embedded in the rotation limit groove 10 contacts the end of the corresponding side of the rotation limit groove 10, and the elastic member is stored in energy under the further rotation of the driving gear 3.

[0132] In order to further consider the miniaturization design of the controller, more specifically, it is set as follows: the driving gear 3 is also provided with a groove 11 extending along the radial direction of the driving gear 3, the first rod segment is fixed to one end of the groove 11 close to the main shaft 4, and the first rod segment is in the free state. The extension direction of the first rod segment and the groove 11 is the same, and both sides of the first rod segment and the side wall of the groove 11 have a swing gap. In this scheme, the elastic member is set as a cantilever rod located in the space occupied by the driving gear 3 to achieve the purpose of optimizing space occupancy. Further, considering the processing quality and avoiding the interchangeability problem between controllers caused by the installation of the cantilever rod, it is set that the elastic rod and the driving gear 3 are designed as an integrated structure, such as preparing the integrated structure by one-time injection molding, and obtaining the elastic rod as a cantilever rod by gap processing of the obtained structure after injection molding. As a person skilled in the art, considering the angle of relative rotation, it is sufficient to set the corresponding gap width. Considering the material of the driving gear 3, in order to meet the requirement that the elastic rod produces elastic deformation within the required relative rotation range, it is sufficient to select a suitable length of the first rod segment.

[0133] At the same time, as a technician in this field, the length direction of the first rod segment is set along the radial direction of the driving gear 3, aiming to ensure that the elastic member has equal resistance to deformation during the forward and reverse rotation of the driving gear 3, but the form and extension direction of the first rod segment are not limited to the proposed radial direction of the driving gear 3.

[0134] In order to optimize the force of the elastic rod and avoid the reliability or life of the controller being reduced due to stress concentration at the connection end of the first rod segment, it is configured as follows: the side walls on both sides of the groove 11 are provided with a protrusion 12 located between the two ends of the first rod segment;

[0135] When the first rod segment is in a free state, there is a gap between the side walls of each side of the first rod segment and the free end of the side protrusion 12. In this solution, the middle / continuous section of the first rod segment is in contact with the end of the protrusion 12, so as to optimize the force on the connection end of the first rod segment. More completely, the shape of the end face of the free end of the protrusion 12 is set to be an arc surface with smooth transition to both sides of the protrusion 12 in the inner and outer directions of the driving gear 3, so as to avoid serious pressure loss on the protrusion 12 and the first rod segment.

[0136] Embodiment 8:

[0137] This embodiment provides a valve based on the technical solution provided in any of the above embodiments, including a valve core that adjusts the valve opening state by rotation, and also includes a valve core transmission member or a valve controller as described in any of the above items, wherein the valve core is fixed on the main shaft 4, and the main shaft 4 serves as the valve stem of the valve core. This valve is based on the use of the valve core transmission member or the valve controller. As mentioned above, this valve not only solves the problem of stalling through structural design, but also, in view of the multiple meshing of the driving gear 3, the structural design of this solution can improve the reliability of the valve transmission, and is conducive to further miniaturization of the valve design.

[0138] Embodiment 9:

[0139] This embodiment provides a valve control method, which is used for the following valve: the valve realizes valve on-off control by rotating the valve core, and the valve stem is driven to rotate by an incomplete gear to drive the valve core to move, and the incomplete gear can rotate relative to the valve stem around the valve stem axis;

[0140] The control method is as follows: before the valve stem performs a reversing rotation, the incomplete gear performs a relative rotation relative to the valve stem around the valve stem axis;

[0141] Through the relative rotation, when the incomplete gear is meshed and reset with the gear teeth used to drive the incomplete gear to rotate, the incomplete gear provides torque to the valve stem to drive the valve core to rotate. This control method is a valve control method based on the above structural design concept. Based on the application of anti-jamming valve drive, this solution provides a technical solution that can easily realize the multiple meshing of the three teeth of the driving gear, improve the meshing reliability, reduce the structural volume and performance requirements of the corresponding hardware part, and reduce the overall structural complexity of the valve.

[0142] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments obtained without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve core transmission component, comprising a driving gear (3) and a main shaft (4), wherein the driving gear (3) is used to drive the main shaft (4) to rotate around the axis of the main shaft (4), and the driving gear (3) is an incomplete gear, characterized in that: The driving gear (3) is capable of performing relative rotation relative to the main shaft (4) around the axis of the main shaft (4); the driving gear (3) is coaxial with the main shaft (4), and the main shaft (4) is rotatably connected to the driving gear (3) via an axial hole on the driving gear (3); The main shaft (4) and the driving gear (3) are each provided with a rotation restraining body, and the rotation restraining body is used for torque transmission between the two: the driving gear (3) transmits torque to the main shaft (4) through mutual compression of the rotation restraining body; An elastic member is also provided between the main shaft (4) and the driving gear (3), and the driving gear (3) transmits torque to the main shaft (4) via the elastic member, and the relative rotation is achieved by elastic deformation of the elastic member; The driving gear (3) is coaxial with the main shaft (4), and the main shaft (4) is clearance-matched with the driving gear (3) through the shaft hole on the driving gear (3); The elastic member is a torsion spring sleeved on the main shaft (4); one end of the torsion spring is fixedly connected to the main shaft (4), and the other end of the torsion spring is fixedly connected to the driving gear (3).

2. The valve core transmission member according to claim 1, characterized in that: Among the two, the rotation constraint on one is a key, and the rotation constraint on the other is a keyway, and the width of the keyway is greater than the width of the key.

3. The valve core transmission member according to claim 2, characterized in that: The key is arranged on the main shaft (4), and the keyway is arranged on the driving gear (3); The depth of the keyway is less than the length of the shaft hole.

4. The valve core transmission member according to claim 2 or 3, characterized in that: The bottom surface of the keyway is an arcuate surface whose axis is coaxial with the axis of the main shaft, and the end surface of the free end of the key is an arcuate surface whose axis is coaxial with the axis of the main shaft; The groove bottom surface is in contact with the end surface.

5. The valve core transmission member according to claim 2 or 3, characterized in that: The number of the keys and keyways is multiple; The number of keys and keyways is equal; The key and keyway form a key engagement working group one by one; The multiple working groups formed are evenly distributed in an annular manner relative to the axis of the main shaft (4); During the relative rotation process, a plurality of working groups are synchronously engaged or disengaged.

6. The valve core transmission member according to claim 1, characterized in that: The rotation constraining body on the main shaft (4) is a boss arranged on the side of the main shaft (4), and there are one or two bosses on the main shaft (4); When there are two bosses on the main shaft (4), the two bosses are located at the same axial position of the main shaft (4), and the two bosses are arranged at intervals in the circumferential direction of the main shaft (4); When there are two bosses on the main shaft (4), the rotation restraining body on the driving gear (3) is a boss arranged on the end surface of the driving gear (3), and during the relative rotation process, the boss on the driving gear (3) can contact each boss on the main shaft (4); When there is one boss on the main shaft (4), the rotation restraining body on the driving gear (3) is two bosses arranged on the end surface of the driving gear (3), and during the relative rotation process, the boss on the main shaft (4) can contact each boss on the driving gear (3).

7. A valve controller, including a drive component, characterized in that: It also comprises a valve core transmission member according to any one of claims 1 to 6, wherein the driving member drives the driving gear (3) to rotate by meshing with the gear teeth on the driving gear (3); During the period of maintaining the tooth meshing, the driving gear (3) and the main shaft (4) are in a matched state of transmission matching; During the process of resetting the tooth engagement after the tooth engagement is disengaged, the drive gear (3) and the main shaft (4) are in a relatively rotatable matching state.

8. The valve controller according to claim 7, characterized in that: During the process of resetting the tooth engagement after the tooth engagement is disengaged, the drive gear (3) and the main shaft (4) are in a relatively rotatable matching state.

9. The valve controller according to claim 7, characterized in that: The driving gear (3) has a plurality of gear teeth; The matching relationship between the driving component and the driving gear (3) satisfies the following conditions: in any rotation direction of the driving gear (3), during the process of resetting the teeth meshing after the teeth meshing is disengaged, when the first teeth on the driving component and the driving gear (3) are meshed and reset, the driving gear (3) and the main shaft (4) are in a matching state capable of relative rotation.

10. The valve controller according to claim 7, characterized in that: The driving component comprises a reduction gear set (7), and the driving gear (3) is used to mesh with the final gear (6) of the reduction gear set (7).

11. The valve controller according to claim 7, characterized in that: It also includes a power component for realizing the resetting of the teeth meshing between the driving gear (3) and the driving component.

12. The valve controller according to claim 11, characterized in that: The power component is an elastic limiter (9); The elastic limiting body (9) stores energy during the rotation of the driving gear (3), and during the tooth meshing resetting process, the elastic limiting body (9) drives the driving gear (3) to rotate by rebounding to achieve tooth meshing resetting.

13. The valve controller according to claim 12, characterized in that: The elastic limiting body (9) is any one or more of the following: a spring, an elastic rope, an elastic rod; The elastic rope has one end connected to the driving gear (3) and the other end connected to the housing of the driving component, and energy is stored by stretching the elastic rope; The spring and the elastic rod are both constrained at one end to one of the driving gear (3) and the housing, and at the other end to the other to store energy.

14. The valve controller according to claim 13, characterized in that: The elastic limiting body (9) comprises an elastic rod, wherein the elastic rod is a bent rod having a bend thereon; The rod segments at both ends of the bend are defined as a first rod segment and a second rod segment, one end of the first rod segment is fixed to the driving gear (3), the two ends of the first rod segment are located at different positions of the driving gear (3) in the radial direction of the driving gear (3), and the free end of the second rod segment protrudes outwardly relative to the end surface of the driving gear (3); The end plate of the shell is also provided with a rotation limiting groove (10), and the second rod section is partially embedded in the rotation limiting groove (10).

15. The valve controller according to claim 14, characterized in that: The driving gear (3) is also provided with a groove (11) extending in a radial direction of the driving gear (3); the first rod segment is fixed to an end of the groove (11) close to the main shaft (4); in a free state, the first rod segment and the groove (11) extend in the same direction; both sides of the first rod segment and the side wall of the groove (11) have a swing clearance.

16. The valve controller according to claim 15, characterized in that: The side walls on both sides of the groove (11) are provided with protrusions (12) located between the two ends of the first rod segment; When the first rod segment is in a free state, there is a gap between the side walls of each side of the first rod segment and the free end of the side protrusion (12).

17. A valve, comprising a valve core that is adjusted to open by rotation, characterized in that: It also includes a valve core transmission member as described in any one of claims 1 to 6 or a valve controller as described in any one of claims 7 to 16, wherein the valve core is fixed on a main shaft (4), and the main shaft (4) serves as a valve stem of the valve core.

18. A valve control method, characterized in that: The control method is used for a valve including a valve core transmission member as described in any one of claims 1 to 6: the valve realizes valve on-off control by rotating the valve core, and drives the valve core to rotate by an incomplete gear, and the incomplete gear can rotate relative to the valve stem around the valve stem axis; The control method is as follows: before the valve stem performs a reversing rotation, the incomplete gear performs a relative rotation relative to the valve stem around the valve stem axis; Through the relative rotation, when the incomplete gear is meshed and reset with the gear teeth for driving the incomplete gear to rotate, the incomplete gear provides torque to the valve stem to drive the valve core to rotate.

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