A valve device

Abstract

The application provides a valve device, which comprises a motor and a gear assembly; further comprises a valve rod and a transmission gear in transmission connection with the valve rod; further comprises a mode switching assembly, which comprises a first piston and a second piston distributed in an axial direction, one end of the first piston is a plurality of tooth portions distributed continuously, the tooth portions are provided with first tooth portion inclined surfaces; the second piston is provided with a plurality of guide rails distributed in a circumferential direction, one end of the guide rails is provided with guide rail inclined surfaces, the guide rail inclined surfaces are matched with the first tooth portion inclined surfaces; when the second piston moves in the axial direction, any gear or the transmission gear can be driven to move, so that any gear of the transmission gear and the gear assembly is disengaged; the valve device is provided with a sliding groove hole, the first piston can move in the axial direction along the sliding groove hole, a plurality of first sliding grooves distributed in the circumferential direction are arranged on a hole inner wall corresponding to the sliding groove hole; the hole inner wall is further provided with a plurality of limiting inclined surfaces and guide inclined surfaces distributed in the circumferential direction, the limiting inclined surfaces, the guide inclined surfaces and the first sliding grooves are alternately distributed in the circumferential direction in sequence. The valve device has a relatively simple structure.

Description

Technical Field

[0001] This application relates to the field of flow control components, specifically to a valve device. Background Technology

[0002] Electric valves can regulate fluid flow. They have two operating modes: electric adjustment mode and manual adjustment mode. In electric adjustment mode, the valve stem is rotated by a motor; in manual adjustment mode, the valve stem is rotated manually. These two modes are independent of each other. Switching between these two modes in related technical solutions requires a relatively large number of components, resulting in a relatively complex structure. Summary of the Invention

[0003] To address the aforementioned technical problems, the purpose of this application is to provide a valve device that simplifies the structure of the valve device.

[0004] This application provides a valve device, including a motor, a transmission gear, and a gear assembly. The gear assembly includes at least one gear, and the motor is drivenly connected to the transmission gear through the gear assembly. The valve device also includes a valve stem component, and the transmission gear is drivenly connected to the valve stem component. The gear assembly and the transmission gear mesh to form a gear transmission system.

[0005] The valve device further includes a mode switching assembly, which includes a first piston and a second piston distributed along the axial direction. The first piston has a plurality of continuously distributed teeth near the end of the second piston, and each tooth has a first tooth slope. The second piston has a plurality of circumferentially distributed guide rails, and each guide rail has a guide rail slope near the end of the first piston. The guide rail slope is adapted to the first tooth slope. When the second piston moves along the axial direction, it can drive any gear in the gear assembly or the transmission gear to move, so that any two gears in the gear transmission system can disengage.

[0006] The valve device has a sliding groove hole, and the first piston can move axially along the sliding groove hole. The inner wall of the hole corresponding to the sliding groove hole is provided with a plurality of first sliding grooves distributed circumferentially, and the first sliding grooves extend axially. The inner wall of the hole also has a plurality of limiting inclined surfaces and guiding inclined surfaces distributed circumferentially. The limiting inclined surfaces, the guiding inclined surfaces and the first sliding grooves are alternately distributed circumferentially. The limiting inclined surfaces and the guiding inclined surfaces are adapted to the first toothed inclined surfaces.

[0007] The valve device's drive component is equipped with a switching assembly. Through the cooperation of the first piston, the second piston, and the sliding groove hole, the switching assembly allows for switching between electric and manual adjustment modes simply by pressing. The switching assembly has a small number of parts and a relatively simple structure. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of a valve device in an embodiment of this application;

[0009] Figure 2 for Figure 1 Exploded view of the central valve device;

[0010] Figure 3 for Figure 2 Exploded view of the drive components of the central valve device;

[0011] Figure 4 for Figure 3 A schematic diagram of the gear assembly and transmission rod assembly of the drive component.

[0012] Figure 5 for Figure 3 A schematic diagram of the mode switching component of the driving unit;

[0013] Figure 6 for Figure 5 Enlarged diagram of part A in the middle;

[0014] Figure 7 for Figure 5 A schematic diagram of the structure of the first piston in the middle;

[0015] Figure 8 for Figure 5 A schematic diagram of the structure of the second piston in the middle;

[0016] Figure 9 for Figure 3 Schematic diagram of the intermediate pressure bar component;

[0017] Figure 10 for Figure 3 Schematic diagram of the structure of the middle cover;

[0018] Figure 11 for Figure 10 A structural schematic diagram of the middle cover from another perspective, and a cross-sectional view showing the position of the assembly mode switching component;

[0019] Figure 12 for Figure 11 Enlarged diagram of part B in the middle;

[0020] Figure 13 for Figure 2 Top view of the drive unit;

[0021] Figure 14 for Figure 13 Cross-sectional view along the CC direction;

[0022] Figure 15 for Figure 14 Enlarged schematic diagram of part D in the middle.

[0023] Figure 16 for Figure 14 A schematic diagram of the structure in the second state after the middle pressure rod component moves down to push the third gear down;

[0024] Figure 17 for Figure 16 A schematic diagram of the structure in which the second piston moves upward and is confined to the limiting inclined surface after the external force is removed, thus entering the third state.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1000-valve device;

[0027] 100 - Drive components;

[0028] 10-Knob;

[0029] 20 - Outer shell;

[0030] 201-Cover; 2011-Cover body; 2012-Cylindrical structure; 2012a-First sliding groove; 2012b-Second sliding groove; 2012b1-First limiting inclined end face; 2012c-Sliding groove hole; 20121-First protruding ridge; 201211-Guide inclined surface; 20122-First limiting groove wall; 20123-Limiting inclined surface; 20124-Second limiting groove wall; 20125-Second protruding ridge; 20251-Second limiting inclined end face; 2013-Bottom wall of hole; 201a-First mounting hole; 201b-Second mounting hole; 202-Base;

[0031] 30 - Mode switching component;

[0032] 301-First piston; 3011-First piston body; 3012-Slide table; 30111-Tooth; 30112-First tooth inclined surface; 30113-Second tooth inclined surface; 3013-Limiting protrusion;

[0033] 302-Second piston; 3021-Second piston body; 30211-Piston end face; 3022-Guide rail; 30221-Guide rail body; 30222-Guide rail end; 3022a-Guide rail inclined surface; 3022a1-Inclined surface top; 3023-Second insertion boss; 3024-First insertion boss; 3025-Step portion;

[0034] 303 - Button; 3031 - Inverted; 3032 - Press Top Cover;

[0035] 304 - Pressure bar component; 3041 - Pressure bar; 3042 - Pressing platform; 30421 - Pressing protrusion; 305 - First spring;

[0036] 40 - Motor;

[0037] 50 - Circuit board assembly;

[0038] 60-Medium plate structure;

[0039] 70-Drive rod; 701-Rod body; 702-Drive gear;

[0040] 80 - Gear assembly; 801 - First gear; 802 - Second gear; 803 - Third gear;

[0041] 90 - Second spring; 010 - Spring post;

[0042] 200 - Valve body assembly; 2001 - Valve stem assembly;

[0043] 300-Snap-fit ​​component. Detailed Implementation

[0044] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. In the embodiments of this application, the terms "first," "second," etc., are mainly used to distinguish the same or similar features, and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0045] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a valve device 1000 in an embodiment of this application; Figure 2 for Figure 1 Exploded view of valve device 1000; Figure 3 for Figure 2 An exploded view of the drive component 100 of the central valve device 1000.

[0046] The valve device 1000 in this embodiment includes a drive component 100 and a valve body component 200. Specifically, the valve device 1000 is an electric valve. The drive component 100 and the valve body component 200 can be snapped together by a snap-fit ​​component 300. The valve body component 200 includes a valve stem component 2001 and a valve core component (not shown in the figure). The drive component 100 is used to drive the valve stem component 2001 to rotate, thereby driving the valve core component to rotate, thereby adjusting the flow rate of the valve device 1000 or switching the flow path.

[0047] In this embodiment, the driving component 100 drives the valve stem component 2001 to rotate in two modes: manual adjustment and electric adjustment. Figure 3As shown, the drive component 100 includes a housing 20, which includes a cover 201 and a base 202. The cover 201 and the base 202 are fastened together. The drive component 100 also includes components other than the housing 20, such as a motor 40, a circuit board assembly 50, and a middle plate structure 60. All components of the drive component 100 are housed inside the housing 20, making the housing 20 a modular structure for easier assembly. The drive component 100 also includes a knob 10, part of which is inserted into the housing 20 and part of which is located on the outside of the housing 20. Manually turning the knob 10 can rotate the valve stem component 2001 for manual adjustment. The motor 40 can rotate the valve stem component 2001 for electric adjustment. The motor 40 is connected to the gear assembly 80, meaning that the motor 40 can drive the valve stem component 2001 to rotate through the gear assembly 80.

[0048] like Figure 4 As shown, Figure 4 for Figure 3 A schematic diagram of the gear assembly 80 and transmission rod assembly 70 of the drive component 100.

[0049] In this embodiment, the gear assembly 80 includes three gears: a first gear 801, a second gear 802, and a third gear 803. The drive component 100 includes a transmission rod 70, which includes a rod body 701 and a transmission gear 702 mounted on the rod body 701. The rod body 701 and the transmission gear 702 can be integrally formed or fixedly connected. The output end of the motor 40 is connected to the first gear 801. The first gear 801 can mesh with the second gear 802, the second gear 802 can mesh with the third gear 803, and the third gear 803 can mesh with the transmission gear 702. The gear assembly 80 serves as a speed reduction mechanism. Therefore, the gear assembly 80 is not limited to three gears; it can also have one or other numbers of gears, depending on the driving requirements.

[0050] The motor 40 drives the transmission gear 702 to rotate via the gear assembly 80, which in turn drives the rod body 701 to rotate. The gear assembly 80 and the transmission gear 702 form a gear transmission system. The rod body 701 is located at one end near the valve body component 200. Figure 4 The lower end of the stem body 702 is connected to the valve stem assembly 2001 via a transmission connection, meaning the transmission gear 702 and the valve stem assembly 2001 are indirectly connected. The other end of the stem body 701, furthest from the valve body (… Figure 4 The upper part of the rod body 701 is connected to the knob 10 for transmission. For example, the knob 10 has a D-shaped hole, and the upper end of the rod body 701 is provided with a D-shaped connector. The D-shaped connector is inserted into the D-shaped hole of the knob 10 to achieve transmission connection. It can be seen that it is not necessary to have a D-shaped design, as long as it is a non-circular structure and can achieve transmission when rotated. The transmission connection method between the rod body 701 and the valve stem component 2001 is understood by reference and will not be described in detail again.

[0051] The axial direction of each gear in the gear assembly 80 is defined as the axial direction. In this embodiment, the axial direction is also the axial direction of the valve device 1000, that is, the axial direction of the valve stem component 2001, which can rotate around its axis. When switching to manual adjustment mode, the second gear 802 and the third gear 803 in this embodiment can be axially offset to disengage, so the power of the motor 40 cannot be transmitted to the transmission rod 70; the transmission rod 70 is rotated only by turning the knob 10. When switching to electric adjustment mode, the third gear 803 moves axially to reach a position where it can mesh with the second gear 802, and the motor 40 can drive the transmission rod 70 to rotate. It can be understood that the mode switching here is actually to disconnect the transmission connection between the motor 40 and the valve stem component 2001. Therefore, as long as the transmission gear 702 and any gear in the gear assembly 80 move axially to disengage any two gears in the gear transmission system, the transmission connection can be disconnected. It is not limited to controlling the second gear 802 and the third gear 803 to disengage. In this embodiment, the first gear 801 is connected to the output end of the motor 40, and the transmission gear 702 is connected to the transmission rod 701. The third gear 803 or the second gear 802 is configured to be axially movable, simplifying the design. A gear shaft can be provided, equipped with a second spring 90. Both the second spring 90 and the third gear 803 are sleeved on the gear shaft. The second spring 90 can drive the third gear 803 to reset to an adjustment mode. In this embodiment, the second spring 90 is in manual adjustment mode when compressed and in electric adjustment mode when reset.

[0052] The following details the switching method between electric and manual adjustment modes in this embodiment, specifically the method of controlling the up-and-down movement of the third gear 803, where up and down refers to the axial direction. In this embodiment, pressing the button 303 is defined as downward, and vice versa as upward.

[0053] like Figures 5 to 9 As shown, Figure 5 for Figure 3 A schematic diagram of the mode switching component 30 of the drive unit 100; Figure 6 for Figure 5 Enlarged schematic diagram of part A in the middle; Figure 7 for Figure 5 A schematic diagram of the structure of the first piston 301; Figure 8 for Figure 5 A schematic diagram of the structure of the second piston 302; Figure 9 for Figure 3 A schematic diagram of the structure of the intermediate pressure rod component 304.

[0054] The driving component 100 in this embodiment includes a mode switching component 30, which includes a button 303, a first piston 301, a second piston 302, a pressure rod component 304, and a first spring 305. The button 303 and the first piston 301 can be integrally arranged or fixedly connected. When the button 303 is pressed, the first piston 301 can be driven to move axially.

[0055] The first piston 301 includes a first piston body portion 3011 and one or more slides 3012 disposed on the outer side wall of the first piston body portion 3011. The first piston body portion 3011 is a cylindrical structure 2012. The slides 3012 protrude radially from the outer side wall of the first piston body portion 3011. The multiple slides 3012 are evenly distributed circumferentially along the first piston body portion 3011. In addition, the end of the first piston body portion 3011 near the second piston 302 has a serrated structure, that is, the lower end of the first piston body portion 3011 has a serrated structure. The serrated structure includes multiple teeth 30111 continuously distributed circumferentially. Each tooth 30111 has two first tooth inclined surfaces 30112 and second tooth inclined surfaces 30113 disposed opposite to each other. A triangular groove is formed between two adjacent teeth 30111.

[0056] The second piston 302 includes a second piston body portion 3021 and one or more guide rails 3022. The second piston body portion 3021 has a piston end face 30211 that is close to the first piston body portion 3011. Figure 8 The piston end face 30211 is the upper end face of the second piston 302. The guide rail 3022 includes a guide rail body 30221, which protrudes radially from the outer side wall of the second piston body 3021. The guide rail 3022 also includes a guide rail end 30222, part of which protrudes axially from the guide rail body 30221 and part of which protrudes axially from the piston end face 30211. The guide rail end 30222 is in contact with the guide rail body 30221 and the piston end face 30211. The end face of the guide rail end 30222 facing the first piston 301 is a guide rail inclined surface 3022a that gradually slopes circumferentially. The guide rail inclined surface 3022a is adapted to the first toothed inclined surface 30112, that is, their inclination angles are the same. The guide rail inclined surface 3022a includes two inclined surface ends distributed circumferentially, one of which is closer to the first piston 301 and can be defined as the inclined surface tip 3022a1. Multiple guide rails 3022 of the second piston 302 are evenly distributed circumferentially along the second piston body portion 3021.

[0057] The pressure rod component 304 can be used to abut against the third gear 803 axially. When the pressure rod component 304 moves downward, it can drive the third gear 803 to move downward, thereby disengaging from the second gear 802. Figure 9The pressure rod component 304 includes a pressure rod 3041 and a pressing platform 3042. The pressing platform 3042 is disposed on the side of the pressure rod 3041 and can be fixedly connected to or integrally disposed with the pressure rod 3041. A portion of the pressing platform 3042 is axially opposite to the third gear 803. When the pressure rod 3041 moves downward, the pressing platform 3042 pushes the third gear 803 downward. The pressing platform 3042 may also be provided with a pressing protrusion 30421, which is used to directly contact the third gear 803 for more effective pushing of the third gear 803 and reduced interference. The pressure rod component 304 is connected to the second piston 302. When the second piston 302 moves axially, it drives the pressure rod component 304 to move.

[0058] The first spring 305 and the pressure rod component 304 of the mode switching component 30 abut against each other axially. Specifically, the first spring 305 is located below the pressure rod 3041. The first spring 305 can be located on the base 202 of the housing 20. The base 202 can have a spring cavity to house at least a portion of the first spring 305 to ensure its stability. Alternatively, a spring post 010 can be provided on the base 202, and the first spring 305 can be fitted onto the spring post 010. When the button 303 is pressed to push the first piston 301, the second piston 302, and the pressure rod component 304 downward, the first spring 305 is compressed. After the external force is removed, the restoring force of the first spring 305 will cause the pressure rod component 304 to move upward, which in turn drives the second piston 302 and the first piston 301 to move upward.

[0059] Please continue to refer to this. Figures 10 to 12 understand, Figure 10 for Figure 3 Schematic diagram of the structure of the middle cover 201; Figure 11 for Figure 10 Another structural schematic diagram of the middle cover 201, and a cross-sectional view showing the position of the assembly switching mode component 30; Figure 12 for Figure 11 Enlarged diagram of part B in the middle.

[0060] In this embodiment, the cover 201 of the outer casing 20 includes a cover body 2011. The cover body 2011 is provided with a second mounting hole 201b that extends axially through the inside and outside, and the aforementioned knob 10 can be inserted into the second mounting hole 201b. In this embodiment, the cover body 2021 also has a first mounting hole 201a, the first mounting hole 201a being in... Figure 11 Specifically, the structure is a notch, meaning that the hole wall corresponding to the first mounting hole 201a has an opening on one side, which facilitates assembly. Of course, it is also possible not to provide an opening. The first mounting hole 201a has a bottom wall 2013, and the button 303 can abut against the bottom wall 2013 during axial pressing, thereby forming a limit.

[0061] from Figure 11 As can be seen, the outer casing 20 includes an axially extending cylindrical structure 2012. Specifically, the cylindrical structure 2012 is disposed on the bottom wall 2013 of the first mounting hole 201a. A portion of the cylindrical structure 2012 is located on one side of the bottom wall 2013, extending towards the inner cavity of the first mounting hole 201a, or extending upwards. The other portion of the cylindrical structure 2012 is located on the other side of the bottom wall 2013, extending downwards. The cylindrical structure 2012 is not limited to being disposed on the upper or lower sides of the bottom wall 2013; disposing it on the upper or lower sides saves space.

[0062] like Figure 12 As shown, the inner hole of the cylindrical structure 2012 is a sliding groove hole. The inner wall of the hole corresponding to the sliding groove hole has multiple circumferentially distributed sliding grooves, namely a first sliding groove 2012a and a second sliding groove 2012b. The first sliding groove 2012a and the second sliding groove 2012b are alternately distributed circumferentially, meaning that each side of the first sliding groove 2012a is adjacent to a second sliding groove 2012b. The depths of the first sliding groove 2012a and the second sliding groove 2012b are different, with the depth of the first sliding groove 2012a being greater than the depth of the second sliding groove 2012b. The depth is a dimension perpendicular to the axial direction. In this embodiment, multiple sliding grooves are mainly machined on the inner wall of the hole. Therefore, the sliding groove hole is not limited to being set on the cylindrical structure 2012. For example, if the cover 201 is relatively thick, a through-hole structure can be machined as a sliding groove hole. Of course, the cylindrical structure 2012 used here is beneficial for saving space and materials.

[0063] Figure 12In the cylindrical structure 2012, the inner wall is provided with multiple protruding first ridges 20121 and second ridges 20125, and the space between two adjacent ridges is a first groove 2012a or a second groove 2012b. Since the depth of the first groove 2012a is greater than that of the second groove 2012b, the bottom wall of the first groove 2012a (and the groove wall opposite to the groove opening in the radial direction) is flush with the inner wall of the cylindrical structure 2012, and the bottom wall of the second groove 2012b protrudes from the inner wall of the cylindrical structure 2012. The lower end faces of the first ridge 20121 and the second cam 20125 are both inclined end faces. Among them, the protruding edges on both sides of the first slide groove 2012a are the first protruding edge 20121 and the second protruding edge 20125, respectively. The inclined end face of the first protruding edge 20121 is the guide inclined surface 201211, and the inclined end face of the second protruding edge 20125 is the second limiting inclined end face 201251. The lower end face of the bottom wall of the second slide groove 2012b is the first limiting inclined end face 2012b1. It can be seen that the second limiting inclined end face 201251 of the second protruding edge 20125 adjacent to the second slide groove 2012b and the first limiting inclined end face 2012b1 of the bottom wall of the second slide groove 2012b are connected together in the circumferential direction to form a continuous inclined surface. This inclined surface is the limiting inclined surface 20123. The limiting inclined surface 20123 is adapted to the guide rail inclined surface 3022a of the guide rail 3022, and the inclination angle is also consistent. The first limiting inclined end face 2012b1 has a first end and a second end distributed circumferentially. The first end and the second limiting inclined end face 2012b1 are connected together, and the second end is connected to the side wall of the adjacent first protrusion 20121.

[0064] You can continue to refer to this. Figures 13 to 15 understand, Figure 13 for Figure 2 Top view of the drive unit 100; Figure 14 for Figure 13 Cross-sectional view along the CC direction; Figure 15 for Figure 14 Enlarged schematic diagram of part D in the middle.

[0065] like Figure 15As shown, button 303 is located in the first mounting hole 201a of cover 201. As mentioned earlier, the first piston 301 of mode switching assembly 30 and button 303 are fixedly connected. In this embodiment, button 303 specifically includes a pressing top cover 3032 and a buckle 3031. One end of buckle 3031 is integrally formed with or fixedly connected to the pressing top cover 3032, and buckle 3031 is located below the pressing top cover 3032. Buckle 3031 can be inserted into the first piston body portion 3011 of the first piston 301. The inner wall of the first piston body portion 3011 is provided with a limiting protrusion 3013. The limiting protrusion 3013 and buckle 3031 are axially limited and abutted downward, that is, buckle 3031 and first piston body portion 3011 are snapped together. When the upper end face of the first piston body 3011 abuts against the pressing top cover 3032, the first piston 301 and the button 303 abut against each other axially upwards. When the button 303 is pressed, the first piston 301 can be moved up and down axially. Of course, the connection method between the button 303 and the first piston 301 is not limited to this. For example, it can be press-fitted. Setting it to the form of an inverted snap 3031 is simpler for installation.

[0066] The top of the second piston body 3021 is provided with a first insertion boss 3024, which can be inserted into the first piston body 3011, thereby limiting its connection with the first piston 301. That is, the second piston 302 and the first piston 301 can be inserted into each other. The aforementioned pressure rod 3041 and the second piston 302 can also be inserted into each other, such as... Figure 14 , 9 As shown, the second piston 302 is provided with a second insertion boss 3023, which is located at the lower end of the second piston body 3021. The second insertion boss 3023 can be inserted into the pressure rod 3041. It can be understood that the first piston 301 can be inserted into the second piston 302, and the pressure rod 3041 can also be inserted into the second piston 302; the insertion fit must achieve an axial abutment fit. Furthermore, as... Figure 8 As shown, the second piston 302 in this embodiment is also provided with a stepped portion 3025, which can be axially engaged with the pressure rod 3041.

[0067] During assembly, the slide 3012 of the first piston 301 can be inserted into either the first slide groove 2012a or the second slide groove 2012b, making assembly more flexible. After assembly, the slide 3012 of the first piston 301 is always inserted into either the first slide groove 2012a or the second slide groove 2012b, so the first piston 301 can only slide along either the first slide groove 2012a or the second slide groove 2012b and cannot rotate. In this embodiment, both the first slide groove 2012a and the second slide groove 2012b have limiting groove walls, which are the upper groove walls of the corresponding slide grooves, and can be defined as the first limiting groove wall 20122 and the second limiting groove wall 20124, respectively. When the slide 3012 of the first piston 301 moves upward and abuts against the first limiting groove wall 20122 or the second limiting groove wall 20124, the first piston 301 is limited. In this embodiment, the first piston 301 has three circumferentially distributed sliding platforms 3012. The cylindrical structure 2012 has a total of six sliding grooves. The three sliding platforms 3012 can be inserted into the three first sliding grooves 2012a or the three second sliding grooves 2012b respectively. Therefore, six sliding platforms 3012 can also be provided, with three inserted into the first sliding grooves 2012a and the other three into the second sliding grooves 2012b. It is easy to understand that the number of sliding platforms 3012 is not limited; they are mainly used to restrict the rotation of the first piston 301. In fact, the second sliding grooves 2012b can also be omitted. In this case, the limiting inclined surface 20123 has a uniform width design, with the width being the radial dimension. Figure 12 The limiting inclined surface 20123 is designed with unequal width due to the presence of the second slide groove 2012b, and multiple limiting inclined surfaces 20123 are evenly distributed along the circumference.

[0068] As can be seen, in this embodiment, the limiting inclined surface 20123, the guide inclined surface 201211, and the first sliding groove 2012a are alternately distributed in the circumferential direction. The central angle corresponding to the first sliding groove 2012a is approximately equal to the central angle corresponding to the guide inclined surface 201211, while the central angle corresponding to the limiting inclined surface 20123 is approximately twice that of the guide inclined surface 201211. In this way, the rotation angle of the second piston 302 is approximately equal each time it is pressed, so as to better control the position adjustment of the second piston 302.

[0069] The guide rail 3022 of the second piston 302 can be inserted into the deeper first slide groove 2012a. When the guide rail 3022 of the second piston 302 is located in the first slide groove 2012a, the relative positional relationship between the first piston 301 and the second piston 302 can be referenced. Figure 6 , 14Understandably, at this time, both the first piston 301 and the second piston 302 can move synchronously along the axial direction. The guide rail inclined surface 3022a and the first tooth inclined surface 30112 of the guide rail 3022 are not completely opposite, but partially opposite and partially offset. The tooth tip of the tooth 30111 is approximately pressed against the middle of the guide rail inclined surface 3022a. At this time, the mode switching component 30 is in the first state, the position of the pressure rod component 304 is relatively high, and the pressure rod component 304 does not push the third gear 803 down. The third gear 803 can mesh with the second gear 802 and is in the electric adjustment mode.

[0070] exist Figure 14 Based on the initial position, pressing button 303 for the first time causes the first piston 301 and the second piston 302 to move downwards. When the second piston 302 disengages from the first groove 2012a, under the pressure of the first spring 305 and the combined action of the first toothed inclined surface 30112 and the guide rail inclined surface 3022a, the second piston 302 will rotate. Figure 5 From a perspective of clockwise rotation, the top edge 3022a1 of the inclined surface 3022a of the guide rail of the second piston 302 will be located at the position where two adjacent teeth 30111 of the first piston 301 meet, that is, the top edge 3022a1 of the inclined surface is inserted into the apex of the triangular groove between the two adjacent teeth 30111. At this time, the second piston 302 moves down compared to the first state, and the mode switching component 30 can be defined as being in the second state. Correspondingly, the pressure rod component 304 also moves down, pushing the third gear 803 down to disengage from the second gear 802. Figure 16 As shown, Figure 16 for Figure 14 A schematic diagram of the structure of the middle pressure rod component 304 moving down to push the third gear 803 down and being in the second state. The third gear 803 and the second gear 802 have a distance h1 in the axial direction. In this embodiment, the third gear 803 is a stepped gear. The large gear of the stepped gear meshes with the first gear 801, and the small gear meshes with the third gear 803.

[0071] Then, the external force of pressing button 303 is released. Under the action of the first spring 305, the pressure rod component 304, the second piston 302, and the first piston 301 move upward together. However, after moving upward a certain distance, because the second piston 302 rotated a certain angle in the previous step, the guide rail inclined surface 3022a of the guide rail 3022 of the second piston 302 will abut against the limiting inclined surface 20123. Specifically, the guide rail inclined surface 3022a will abut against the second limiting inclined end surface 201251 of the second protrusion 20125. Since the second piston 302 rotated a certain angle when entering the second state, the guide rail inclined surface 3022a will abut against the limiting inclined end surface 201251 of the second protrusion 20125. The top end 3022a1 of the inclined surface 3022a will abut against the approximate middle position of the second limiting inclined end surface 201251. Under the action of cooperating with the second limiting inclined end surface 201251, the second piston 302 continues to rotate in the same direction and then abuts against the first limiting inclined end surface 2012b1 of the second slide groove 2012b. The second piston 302 continues to rotate until the top end 3022a1 of the inclined surface of the second piston 302 abuts against the position where the first limiting inclined end surface 2012b1 and the side wall of the first protrusion 20121 meet, that is, abuts against the second end of the first limiting inclined end surface 2012b1.

[0072] Simultaneously, during the upward movement after the external force is removed, the top tip 3022a1 of the inclined surface rotates at a certain angle under the abutment of the limiting inclined surface 20123. The top tip 3022a1, initially abutting the apex of the triangular groove of the first piston 301, will pass over a second toothed inclined surface 30113 corresponding to the triangular groove and abut against approximately the middle of the first toothed inclined surface 30112, which is opposite to the second toothed inclined surface 30113. This is also the reason why the guide rail end 30222 is partially located above the piston end face 30221 and partially above the guide rail body 30221, as mentioned above. The portion above the piston end face 30221 abuts against the first toothed inclined surface 30112, and the portion above the guide rail body 30221 abuts against the limiting inclined surface 20123. At this time, the second piston 302 is limited by the limiting inclined surface 20123 and cannot move upward; the second piston 302 is in the third state. Compared to the second state, the second piston 302 has moved upwards by a certain distance, but is still lower than the first state, keeping the third gear 803 and the second gear 802 in a disengaged state, switching to manual adjustment mode. For example... Figure 17 As shown, Figure 17 for Figure 16 The schematic diagram shows the structure of the second piston 302 moving upward and confined to the limiting inclined surface 20123 after the external force is removed, thus being in the third state. The third gear 803 and the second gear 802 have a distance h2 in the axial direction, where h2 is less than h1.

[0073] When button 303 is pressed for the second time, the guide rail inclined surface 3022a of the guide rail 3022 of the second piston 302 disengages from the limiting inclined surface 20123. Under the combined action of the first spring 305, the first toothed inclined surface 30112, and the guide rail inclined surface 3022a, the second piston 302 rotates again until the top of the inclined surface 3022a1 is located at the apex of the next triangular groove of the first piston 301. Then the external force is removed, and the guide rail inclined surface 3022a of the guide rail 3022 of the second piston 302 abuts against the guide inclined surface 201211 of the first protrusion 20121. With the cooperation of the guide inclined surface 201211, the guide rail 3022 rotates and slides into the first sliding groove 2012a, so as to move upward with the first piston 301, thereby returning to the first state, and then switching to the electric adjustment mode.

[0074] As you can see, by repeating the first and second presses, you can switch between electric and manual adjustment modes multiple times.

[0075] In the above embodiments, when the second piston 302 drives the pressure rod component 304 to move downward, the second gear 802 and the third gear 803 disengage. It can be understood that the second gear 802 and the third gear 803 may also begin to mesh when the second piston 302 drives the pressure rod component 304 to move downward. No specific limitation is made on this.

[0076] As can be seen from the above embodiments, the number of components in the mode switching component 30 of the drive component 100 of the valve device 1000 is relatively small, mainly including the first piston 301 and the second piston 302. In order to better transmit and reset, a pressure rod component 304, a first spring 305 and a second spring 90 can be added, and the structure is still relatively simple.

[0077] The valve device 1000 in this embodiment is used to regulate the system flow or switch the flow path. For example, the valve device 1000 is used in a heat pump heating water heater in a heating system to regulate the amount of cold water and hot water to ensure that the water temperature of the underfloor heating is more suitable.

[0078] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A valve device, characterized in that, The device includes a motor (40), a transmission gear (702), and a gear assembly (30), wherein the gear assembly (30) includes at least one gear, and the motor (30) is connected to the transmission gear (702) via the gear assembly (30); the valve device (1000) also includes a valve stem component (2001), and the transmission gear (702) is connected to the valve stem component (2001), wherein the gear assembly (30) and the transmission gear (702) mesh to form a gear transmission system; The valve device further includes a mode switching assembly (30), which includes a first piston (301) and a second piston (302) distributed along the axial direction. The first piston (301) has a plurality of continuously distributed teeth (30111) near the end of the second piston (302), and the teeth (30111) have a first tooth inclined surface (30112). The second piston (302) has a plurality of circumferentially distributed guide rails (3022), and the guide rails (3022) have a guide rail inclined surface (3022a) near the end of the first piston (301), which is adapted to the first tooth inclined surface (30112). When the second piston (302) moves along the axial direction, it can drive any gear in the gear assembly (30) or the transmission gear (702) to move, so that any two in the gear transmission system can disengage. The valve device (1000) has a sliding groove hole (2012c), and the first piston (301) can move axially along the sliding groove hole (2012c). The inner wall of the hole corresponding to the sliding groove hole (2012c) is provided with a plurality of first sliding grooves (2012a) distributed circumferentially, and the first sliding grooves (2012a) extend axially. The inner wall of the hole also has a plurality of limiting inclined surfaces (20123) and guiding inclined surfaces (201211) distributed circumferentially. The limiting inclined surfaces (20123), the guiding inclined surfaces (201211) and the first sliding grooves (2012a) are distributed alternately in the circumferential direction. The limiting inclined surfaces (20123) and the guiding inclined surfaces (201211) are both adapted to the first toothed inclined surface (30112).

2. The valve device according to claim 1, characterized in that, The outer wall of the first piston (301) has a slide (3012) or multiple slides (3012) distributed circumferentially, the slides (3012) being inserted into the first groove (2012a).

3. The valve device according to claim 1, characterized in that, The inner wall of the corresponding sliding hole (2012c) is provided with a plurality of second sliding grooves (2012b) distributed along the axial direction. The first sliding groove (2012a) and the second sliding grooves (2012b) are alternately distributed in the circumferential direction. The depth of the second sliding groove (2012b) is less than the depth of the first sliding groove (2012a). One end face of the bottom wall of the first sliding groove (2012a) is a part of the limiting inclined surface (20123). The outer wall of the first piston (301) has a slide (3012) or multiple slides (3012) distributed circumferentially, the slides (3012) being inserted into the first slide groove (2012a) or the second slide groove (2012b).

4. The valve device according to claim 3, characterized in that, The inner wall of the groove hole (2012c) is provided with a plurality of first protrusions (20121) and a plurality of second protrusions (20125). The first groove (2012a) or the second groove (2012b) is located between adjacent first protrusions (20121) and second protrusions (20125). One end face of the first protrusion (20121) is the guide slope (201211), one end face of the second protrusion (20125) is the second limiting slope end face (201251), one end face of the bottom wall of the second groove (2012b) is the first limiting slope end face (2012b1), and the second limiting slope end face (201251) and the first limiting slope end face (2012b1) are connected to form the limiting slope (20123).

5. The valve device according to claim 1, characterized in that, The valve device (2001) further includes a pressure rod component (304), which includes a pressure rod (3041) and a pressing table (3042). The pressure rod (3041) is connected to the second piston (302), and the pressing table (3042) is used to drive any gear in the gear assembly (30) or the transmission gear (702) to move axially.

6. The valve device according to claim 5, characterized in that, The first piston (301) and the second piston (302) are inserted into each other, and / or the second piston (302) and the pressure rod (3041) are inserted into each other.

7. The valve device according to any one of claims 1-6, characterized in that, The valve device (1000) includes a cylindrical structure (2012), the inner hole of which is the sliding groove hole (2012c).

8. The valve device according to any one of claims 1-6, characterized in that, The mode switching component (30) includes a button (303) and a first spring (305). When the button (303) presses the first piston (301) to move axially, the first spring (305) is compressed. And / or, the valve device (1000) includes a button (303) and a second spring (90), the second spring (90) being compressed when the button (303) presses the first piston (301) to drive any gear in the gear assembly (30) or the transmission gear (702) to move axially.

9. The valve device according to claim 8, characterized in that, The valve device (1000) includes a housing (20), the housing (20) including a snap-fit ​​cover (201) and a base (202), the cover (201) including a cylindrical structure (2012) with an inner hole of the cylindrical structure (2012) being the slide hole (2012c); the first spring (305) and the second spring (90) are disposed on the base.

10. The valve device according to claim 8, characterized in that, The button (303) is provided with a buckle (3031), which is snapped into connection with the first piston (301).

11. The valve device according to any one of claims 1-6, characterized in that, The valve device (1000) includes a transmission rod component (70), which includes a transmission rod (701) and a transmission gear (702). The transmission gear (702) and the transmission rod (701) are integrally formed or fixedly connected. The valve device (1000) also includes a knob (10), the transmission rod (701) and the valve stem component (2001) are connected in a transmission manner, and the transmission rod (701) is also connected in a transmission manner to the knob (10).

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