An electric heating push rod for electronic thermostat

Abstract

The present invention provides an electric heating push rod for an electronic thermostat, which relates to the technical field of electric heating push rods, including an electric heating push rod body, the electric heating push rod body including a protective shell, a plug, two heating elements, two pairs of cores and two pairs of pins, the upper surface of the protective shell is fixedly connected to a connecting shell 1, the upper surface of the connecting shell 1 is fixedly connected to a connecting shell 2, the right surface of the connecting shell 2 is fixedly connected to a connecting block, the right end of the connecting block is fixedly connected to a connecting plate, the two pairs of cores are respectively fixedly connected to the two heating elements and the two pairs of pins, and the other two pins will be located in the middle position of the plug, waiting to be connected to the electronic thermostat socket. When a push rod fails, the pins can be quickly switched to achieve connection with the other push rod, thereby ensuring that the basic functions of the electronic thermostat are not affected, maintaining the normal operation of the cooling system, reducing the risk of overheating or overcooling of the engine due to thermostat failure, and improving the reliability and stability of the entire system.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric heating push rods, and more specifically, relates to an electric heating push rod for an electronic thermostat. Background Art

[0002] The electronic thermostat plays a crucial role in the automotive engine cooling system, maintaining the engine within an appropriate operating temperature range by precisely controlling the coolant's circulation path and flow rate. The electrically heated actuator used in the electronic thermostat is one of the core components that enables this precise control. It pushes the thermostat valve open or closed based on the engine's operating conditions, thereby regulating the direction and flow of the coolant.

[0003] In the working process of the electronic thermostat, the following key parts are usually involved:

[0004] 1. Heating element: It is the source of power for the electric push rod. It is generally made of materials with good resistance and high temperature resistance, such as nickel-chromium alloy. When current passes through, it can quickly generate heat, causing the push rod to move.

[0005] 2. Push rod body: It includes the outer shell and the core. The outer shell is mostly made of metal materials such as stainless steel, which has high strength and corrosion resistance and can effectively protect the internal structure. The core is usually made of a special alloy with good thermal expansion performance. It can extend axially when heated, thereby pushing the thermostat valve to operate.

[0006] 3. Sealing components: Rubber sealing rings are usually used and installed at the contact points between the electric push rod and the thermostat housing and coolant. Their function is to prevent the coolant from leaking into the push rod, while avoiding the invasion of external impurities and ensuring the stability of the internal environment of the push rod. The material must be able to withstand the corrosion of the coolant and repeated changes in high and low temperatures.

[0007] 4. Connecting components: One end is connected to the external power supply through a wire connector. The connector is required to have good conductivity and connection reliability to ensure stable power transmission; the other end is connected to the thermostat valve with the help of a mechanical connection structure, such as a pin or slot, to ensure that the displacement of the push rod can be accurately converted into changes in the valve opening.

[0008] Currently, common designs for electric actuators in electronic thermostats focus on optimizing the performance of individual actuators and ensuring a secure connection to the thermostat. Some manufacturers employ high-precision machining to enhance the thermal expansion accuracy and mechanical strength of individual actuators, while others focus on improving the design of connecting components to enhance their resistance to vibration and loosening.

[0009] However, the above-mentioned prior art still has some shortcomings. In terms of the reliability of the push rod, once a single push rod fails, such as the heating element is damaged or the push rod is stuck, the control function of the entire electronic thermostat will be seriously affected, which may cause the engine cooling system to lose control and cause serious problems such as engine overheating. In response to these problems, the present application proposes an innovative solution, designing an electric heating push rod for an electronic thermostat with a double push rod structure and a stable plug connection that is easy to replace. When one push rod fails, the maintenance personnel can manually switch to another push rod to work quickly. At the same time, its plug connection is stable and reliable, which effectively improves the overall performance and reliability of the electronic thermostat and ensures the stable operation of the engine cooling system.

[0010] In view of this, the existing structure and defects are studied and improved, and an electric heating push rod for an electronic thermostat is provided to achieve a more practical purpose. Summary of the Invention

[0011] In order to solve the above technical problems, the present invention provides an electric heating push rod for an electronic thermostat to solve the above problems.

[0012] The hot pressing plate of the embodiment of the present invention is fixedly provided with a plurality of connecting rods, and the connecting rods are connected to the connecting plate by a plurality of connecting rods.

[0013] Preferably, the left surfaces of the two fixed blocks are fixedly connected with cylindrical coil springs, and the two cylindrical coil springs are respectively fixedly connected with two slots three. Two limit slots one are opened through the left surface of the connecting plate, and the two limit slots one are respectively movably connected with the two limit blocks.

[0014] Preferably, two pairs of limit grooves 2 are provided on the left surface of the plug, and the two pairs of limit grooves 2 are movably connected with the two pairs of limit blocks respectively, and the two sliders are movably connected with the connecting blocks. Two pairs of card slots 1 are provided on the inner wall of the plug, and the two pairs of card slots 1 are movably connected with the two pairs of pins respectively.

[0015] Preferably, the two pairs of annular sides of the sleeves are respectively movably connected to two connecting tubes, and the two connecting tubes are fixedly connected to the inner wall of the protective shell. The front and rear sides of the connecting shell one and the connecting shell two are fixedly connected to a group of heat dissipation fins, and the two pairs of pins are movably connected to the connecting block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present invention, the two rearmost pins of the two pairs of pins will be snapped into one of the two slots provided on the inner wall of the plug, while the other two pins will be located in the middle of the plug, waiting to be connected to the electronic thermostat socket. When one push rod fails, the pins can be quickly switched to connect to the other push rod, thereby ensuring that the basic functions of the electronic thermostat are not affected, maintaining the normal operation of the cooling system, reducing the risk of overheating or overcooling of the engine due to thermostat failure, and improving the reliability and stability of the entire system.

[0018] In the present invention, by pressing the two sliders and moving them to the left, the fixed blocks fixed thereto will be driven to move together, and the two fixed blocks move in the card slot three to compress the two cylindrical coil springs. At this time, the limit blocks fixed on the two sliders will also move accordingly. At this time, the two limit blocks will be disengaged from the two limit slots two opened on the plug, and the limit will be opened. The plug can be moved, and the two limit blocks are reset by the elastic force of the cylindrical coil spring to limit the plug. The overall operation of replacing the pins is relatively simple, does not require complicated tools and professional skills, and can be completed in a relatively short time.

[0019] In the present invention, a group of heat dissipation fins are fixedly connected to the surfaces of the connecting shell one and the connecting shell two. The heat dissipation fins can increase the heat dissipation area and accelerate the transfer of heat to the surrounding environment. The two pairs of pins are fixed by the connecting block to ensure stability during use. The connection limit of the connecting shell one and the connecting shell two is used to limit and protect the internal components, so that they will not be easily moved due to external vibrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection shell structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the structural protective shell of the present invention;

[0023] Figure 4 This is a schematic diagram of the connecting block structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the plug structure of the present invention;

[0025] Figure 6 It is a schematic structural diagram of the connecting plate of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the slider of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the fixed block of the present invention.

[0028] In the figure, the correspondence between the structure names and the drawing numbers is: 1. Protective shell; 2. Connecting shell 1; 3. Connecting shell 2; 4. Connecting block; 5. Plug; 6. Connecting plate; 7. Heat dissipation fins; 8. Connecting pipe; 9. Sleeve; 10. Core; 11. Heating element; 12. Pin; 13. Slot 1; 14. Slider; 15. Slot 2; 16. Limiting slot 1; 17. Limiting slot 2; 18. T-block; 19. Limiting block; 20. Slot 3; 21. Fixing block; 22. Cylindrical coil spring. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0030] See also Figure 1 - Figure 8 The present invention provides an electric heating push rod for an electronic thermostat, including an electric heating push rod body, the electric heating push rod body including a protective shell 1, a plug 5, two heating elements 11, two pairs of cores 10 and two pairs of pins 12, the upper surface of the protective shell 1 is fixedly connected to a connecting shell 1 2, the upper surface of the connecting shell 1 2 is fixedly connected to a connecting shell 2 3, the right surface of the connecting shell 2 3 is fixedly connected to a connecting block 4, the right end of the connecting block 4 is fixedly connected to a connecting plate 6, the two pairs of cores 10 are respectively fixedly connected to the two heating elements 11 and the two pairs of pins 12, the annular side surfaces of the two pairs of cores 10 are movably sleeved with sleeves 9, the left surface of the plug 5 is fixedly connected to two T-blocks 18, the upper and lower sides of the connecting block 4 are both provided with card slots 3 20, and the two card slots 3 20 are provided inside. Both are movably connected with a fixed block 21, and the back surfaces of the two fixed blocks 21 are fixedly connected with a slider 14, and the back surfaces of the two sliders 14 are fixedly connected with a limiting block 19. Two card slots 2 15 are provided on the right surface of the connecting plate 6, and the two card slots 2 15 are movably connected with two T-blocks 18 respectively. The inside of the protective shell 1 is filled with temperature-sensitive substances, such as paraffin. When the heating element 11 is energized, heat is generated, and the internal paraffin is heated and melted. The paraffin changes from solid to liquid, and its volume will expand. Since the internal space of the protective shell 1 is limited, the expansion of the paraffin volume will generate an axial thrust on the protective shell 1, thereby causing it to stretch and push the thermostat valve and other components connected thereto to realize the opening or closing action of the thermostat.

[0031] The left surfaces of the two fixed blocks 21 are fixedly connected with cylindrical coil springs 22, and the two cylindrical coil springs 22 are fixedly connected with the two card slots 3 20 respectively. Two limit grooves 16 are provided on the left surface of the connecting plate 6. The two limit grooves 16 are movably connected with the two limit blocks 19 respectively. The electric heating push rod is connected to the electronic thermostat through the pin 12 provided in the plug 5. During its operation, when one of the push rods fails to work normally, by pressing the two sliders 14 to move to the left, the fixed block 21 fixed thereto will be driven to move together. The two fixed blocks 21 move in the card slot 3 20 to compress the two cylindrical coil springs 22. At this time, the limit blocks 19 fixed on the two sliders 14 also move accordingly. At this time, the two limit blocks 19 will be separated from the plug 5 is engaged with the two limit grooves 2 17 opened on the inner wall of the plug 5, and the limit is opened, so that the plug 5 can move. The plug 5 is movably connected to the connecting plate 6 through the two T-blocks 18 fixed thereon. At this time, the plug 5 is moved forward to the top. At this time, the two rearmost pins 12 of the two pairs of pins 12 will be engaged with the two card grooves 1 13 opened on the inner wall of the plug 5, and the other two pins 12 will be located in the middle position of the plug 5, waiting to be connected to the electronic thermostat socket. When one push rod fails, the pin 12 can be quickly switched to connect with the other push rod, ensuring that the basic function of the electronic thermostat is not affected, maintaining the normal operation of the cooling system, reducing the risk of overheating or overcooling of the engine due to thermostat failure, and improving the reliability and stability of the entire system.

[0032] The left surface of the plug 5 is provided with two pairs of limit grooves 2 17, and the two pairs of limit grooves 2 17 are respectively engaged with the two pairs of limit blocks 19, and the two sliders 14 are engaged with the connecting block 4. The inner wall of the plug 5 is provided with two pairs of card slots 13, and the two pairs of card slots 13 are respectively engaged with the two pairs of pins 12. The two pairs of sleeves 9 are respectively engaged with two connecting tubes 8 on the annular side. The two connecting tubes 8 are fixedly connected to the inner wall of the protective shell 1. A group of heat dissipation fins 7 are fixedly connected to the front and rear sides of the connecting shell 1 2 and the connecting shell 2 3. The two pairs of pins 12 are engaged with the connecting block 4. The two limit blocks 19 are connected by a cylindrical spiral. The elastic force of the spring 22 is used to reset the plug 5 to limit the position. The operation of replacing the pins 12 as a whole is relatively simple, does not require complex tools and professional skills, and can be completed in a relatively short time. A group of heat dissipation fins 7 are fixedly connected to the surface of the connecting shell 1 2 and the connecting shell 2 3. The heat dissipation fins 7 can increase the heat dissipation area and accelerate the transfer of heat to the surrounding environment. The two pairs of pins 12 are fixed by the connecting block 4 to ensure stability during use, and the connection limit of the connecting shell 1 2 and the connecting shell 2 3 is used to limit the internal components and thus will not be easily moved due to external vibrations.

[0033] Working principle:

[0034] In the first step, the protective shell 1 is filled with a temperature-sensitive substance, such as paraffin. When the heating element 11 is energized, heat is generated, which causes the internal paraffin to melt due to the heat. The paraffin changes from solid to liquid, and its volume will expand. Since the internal space of the protective shell 1 is limited, the expansion of the paraffin volume will generate an axial thrust on the protective shell 1, thereby stretching it and pushing the thermostat valve and other components connected thereto to realize the opening or closing action of the thermostat. The electric heating push rod is connected to the electronic thermostat through the pin 12 provided in the plug 5. During its operation, when one of the push rods fails to work normally, by pressing the two sliders 14 to move to the left, the fixed block 21 fixed thereto will be driven to move together. The two fixed blocks 21 move in the slot three 20 to compress the two cylindrical coil springs 22. At this time, the limiters fixed on the two sliders 14 The positioning block 19 will also move accordingly. At this time, the two limit blocks 19 will be disengaged from the two limit grooves 17 opened on the plug 5, and the limit will be opened. The plug 5 can move. The plug 5 is movably connected to the connecting plate 6 through the two T-blocks 18 fixed thereon. At this time, the plug 5 is moved forward to the top. At this time, the two rearmost pins 12 of the two pairs of pins 12 will be engaged in the two card grooves 13 opened on the inner wall of the plug 5, and the other two pins 12 will be located in the middle position of the plug 5, waiting to be connected to the electronic thermostat socket. When one push rod fails, the pin 12 can be quickly switched to connect with the other push rod, ensuring that the basic function of the electronic thermostat is not affected, maintaining the normal operation of the cooling system, reducing the risk of engine overheating or overcooling due to thermostat failure, and improving the reliability and stability of the entire system.

[0035] In the second step, the two limit blocks 19 are reset by the elastic force of the cylindrical coil spring 22 to limit the plug 5. The operation of replacing the pins 12 as a whole is relatively simple, does not require complex tools and professional skills, and can be completed in a relatively short time. A group of heat dissipation fins 7 are fixedly connected to the surface of the connecting shell 1 2 and the connecting shell 2 3. The heat dissipation fins 7 can increase the heat dissipation area and accelerate the transfer of heat to the surrounding environment. The two pairs of pins 12 are fixed by the connecting block 4 to ensure stability during use, and the internal components are limited and protected by the connection limit of the connecting shell 1 2 and the connecting shell 2 3, so that they will not be easily moved due to external vibrations.

[0036] The examples of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as are suited for specific applications.

Claims

1. An electric heating push rod for an electronic thermostat, comprising an electric heating push rod body, wherein the electric heating push rod body comprises a protective shell (1), a plug (5), two heating elements (11), two pairs of cores (10) and two pairs of pins (12); characterized in that: The upper surface of the protective shell (1) is fixedly connected to a connecting shell 1 (2), the upper surface of the connecting shell 1 (2) is fixedly connected to a connecting shell 2 (3), the right surface of the connecting shell 2 (3) is fixedly connected to a connecting block (4), the right end of the connecting block (4) is fixedly connected to a connecting plate (6), and the two pairs of cores (10) are fixedly connected to the two heating elements (11) and the two pairs of pins (12) respectively; The two pairs of core bodies (10) are movably sleeved with sleeves (9) on their annular side surfaces, the left surface of the plug (5) is fixedly connected with two T-shaped blocks (18), the upper and lower sides of the connecting block (4) are provided with three card slots (20), the two card slots (20) are movably clamped with fixed blocks (21), the back surfaces of the two fixed blocks (21) are fixedly connected with sliders (14), and the back surfaces of the two sliders (14) are fixedly connected with limit blocks (19); The right surface of the connecting plate (6) is provided with two second card slots (15), and the two second card slots (15) are respectively engaged with the two T-shaped blocks (18). The left surfaces of the two fixed blocks (21) are fixedly connected with cylindrical coil springs (22), and the two cylindrical coil springs (22) are respectively connected with the two card slots (20). The left surface of the connecting plate (6) is provided with two limit slots (16), and the two limit slots (16) are respectively engaged with the two limit blocks (19). The left surface of the plug (5) is provided with two pairs of limit slots (17), and the two pairs of limit slots (17) are respectively engaged with the two limit slots (17). 7) are respectively movably connected with two pairs of limit blocks (19), the two sliders (14) are movably connected with the connecting block (4), the inner wall of the plug (5) is provided with two pairs of slots (13), the two pairs of slots (13) are respectively movably connected with the two pairs of pins (12), the two pairs of sleeves (9) are respectively movably connected with two connecting tubes (8) on the annular side, the two connecting tubes (8) are fixedly connected with the inner wall of the protective shell (1), the front and rear sides of the connecting shell (2) and the connecting shell (3) are fixedly connected with a group of heat dissipation fins (7), and the two pairs of pins (12) are movably connected with the connecting block (4).

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