Thermostat for engine cooling system and vehicle

Abstract

The application provides a thermostat for an engine cooling system and a vehicle, the thermostat comprising a main body, a movable rod and a driving mechanism, the main body being provided with a water inlet, a first water outlet and a second water outlet, the movable rod being slidingly connected in the main body, the movable rod being provided with a first sealing cover capable of sealing the first water outlet and a second sealing cover capable of sealing the second water outlet, the driving mechanism being in transmission connection with the movable rod and capable of driving the movable rod to move to a state that the first sealing cover seals the first water outlet, a state that the second sealing cover seals the second water outlet or a state that the first sealing cover does not seal the first water outlet and the second sealing cover does not seal the second water outlet, thereby realizing adjustment of the flowing direction of the cooling liquid. Compared with the traditional thermostat using paraffin as a power source to adjust the flowing direction of the cooling liquid, the application uses the driving mechanism as the power source, does not need to configure paraffin and a spring, and can maintain the control precision under long-term work.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and mainly to a thermostat for an engine cooling system and a vehicle. Background Technology

[0002] In existing thermostats, to ensure the sealing of the large and small circulation pipes in the engine cooling system, springs are typically used to compress the valves, thereby improving the sealing effect. However, the length and elasticity of the springs used significantly limit the procurement range, increasing manufacturing costs. Furthermore, due to the limited lifespan of the springs, the restoring force on the sealing cap becomes insufficient after prolonged use, affecting the sealing cap's functionality. Secondly, because existing thermostats use paraffin wax as a driving force, and paraffin wax is a consumable, its thermal expansion and contraction over long-term use can reduce the compression of the sealing cap, impacting the accuracy of coolant control over engine cooling. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a thermostat and vehicle for an engine cooling system, so that the thermostat can maintain stable control accuracy even under long-term use.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A thermostat for an engine cooling system includes: a main body having a cavity inside, the main body having an inlet, a first outlet, and a second outlet communicating with the cavity; a movable rod disposed within the cavity and connected to the main body, movable relative to the main body, the movable rod having a first sealing cover and a second sealing cover connected thereto, the first sealing cover sealing the first outlet and the second sealing cover sealing the second outlet; and a drive mechanism fixed to one side of the main body and throttle-connected to the movable rod, the drive mechanism driving the movable rod to a position where the first sealing cover seals the first outlet or the second sealing cover seals the second outlet.

[0006] In some embodiments of this application, the main body includes a shell, a connecting cover, and a fixing frame. The connecting cover is fixedly connected to the shell, and a cavity is formed between the connecting cover and the shell. The fixing frame is provided with a connecting part, which is engaged between the shell and the connecting cover. The movable rod is slidably connected to the fixing frame.

[0007] In some embodiments of this application, the first water outlet is disposed on the outer shell, and the second water outlet is disposed on the connecting cover; the movable rod, the first water outlet, and the second water outlet are coaxially disposed, the movable rod is located between the first water outlet and the second water outlet, and the first sealing cover and the second sealing cover are respectively disposed at both ends of the movable rod; the water inlet is disposed between the first water outlet and the second water outlet, and the water inlet communicates with the middle part of the cavity.

[0008] In some embodiments of this application, the fixed frame is provided with a limiting groove, and the movable rod is provided with a limiting block. The limiting block and the limiting groove are configured to restrict the movement range of the movable rod to be between the position where the first sealing cover seals the first water outlet and the position where the second sealing cover seals the second water outlet.

[0009] In some embodiments of this application, the fixing frame includes a first mounting base, a second mounting base, and a connecting piece. The first mounting base and the second mounting base are spaced apart. One end of the connecting piece is connected to the first mounting base, and the other end is connected to the second mounting base. The connecting part is disposed on the connecting piece. The first mounting base has a first through hole, and the second mounting base has a second through hole. The movable rod passes through the first through hole and the second through hole, and the movable rod can slide relative to the first through hole and the second through hole.

[0010] In some embodiments of this application, the movable rod includes a first guide portion, a second guide portion, and a connecting rod. One end of the connecting rod is fixedly connected to the first guide portion in the axial direction, and the other end is threadedly connected to the second guide portion. The first guide portion mates with the first through hole, and the second guide portion mates with the second through hole. The first sealing cap is connected to the side of the first guide portion away from the connecting rod, and the second sealing cap is connected to the side of the second guide portion away from the connecting rod.

[0011] In some embodiments of this application, the limiting groove includes a first limiting groove and a second limiting groove, the first limiting groove being disposed on the side wall of the first through hole, and the second limiting groove being disposed on the side wall of the second through hole; the limiting block includes a first limiting block and a second limiting block, the first limiting block being disposed on the circumferential surface of the first guide portion and cooperating with the first limiting groove, and the second limiting block being disposed on the circumferential surface of the second guide portion and cooperating with the second limiting groove.

[0012] In some embodiments of this application, the driving mechanism includes a motor, a screw, and a movable plate. The motor is fixed to the housing, the screw is rotatably connected to the fixed frame and is driven by the motor, and the movable plate is fixed to the connecting rod and threadedly connected to the screw. The fixed frame also includes a support ring plate, which is disposed on the circumferential outer side of the first mounting base, and the screw is rotatably connected to the support ring plate. A guide rod is also fixed on the fixed frame, which is located on the side of the movable rod away from the screw, and the movable plate is slidably connected to the guide rod.

[0013] In some embodiments of this application, the thermostat for the engine cooling system further includes: a controller, fixed on the main body and electrically connected to the drive mechanism; and a temperature sensor, electrically connected to the controller, wherein the controller can control the drive mechanism to operate according to the signal from the temperature sensor.

[0014] A vehicle includes a body, an engine, a radiator, and a thermostat. The engine and the radiator are both fixed to the body. The inlet of the thermostat is connected to the coolant outlet of the engine. The first outlet is connected to the coolant inlet of the engine. The second outlet is connected to the inlet of the radiator. The outlet of the radiator is connected to the coolant inlet of the engine.

[0015] Beneficial Effects: The thermostat includes a main body, a movable rod, and a drive mechanism. The main body has an internal cavity and is equipped with an inlet, a first outlet, and a second outlet communicating with the cavity. The movable rod is located within the cavity and can move relative to the main body. The movable rod has a first sealing cover and a second sealing cover. The first sealing cover seals the first outlet, and the second sealing cover seals the second outlet. The drive mechanism is connected to the movable rod and can drive the movable rod to either the position where the first sealing cover seals the first outlet or the position where the second sealing cover seals the second outlet. This allows the thermostat to be in a state where the first sealing cover seals the first outlet, the second sealing cover seals the second outlet, or neither the first nor the second sealing cover seals the first or second outlet, thereby regulating the coolant flow direction. Compared to traditional thermostats that use paraffin wax as a power source to regulate coolant flow, this application uses a drive mechanism as the power source, eliminating the need for paraffin wax and springs, thus maintaining the thermostat's control accuracy over long-term operation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a thermostat.

[0017] Figure 2 This is a right view of the thermostat.

[0018] Figure 3 This is a three-dimensional structural diagram of the thermostat in cross-section.

[0019] Figure 4 This is a three-dimensional structural diagram of the thermostat's outer casing and connecting cover in cross-section.

[0020] Figure 5 This is a cross-sectional view of the thermostat from the front view direction.

[0021] Figure 6 This is a cross-sectional view of the thermostat from the right side.

[0022] Figure 7 This is a three-dimensional schematic diagram of the connection structure between the fixed frame and the movable rod, with the fixed frame shown in cross-section.

[0023] Figure 8 yes Figure 7 A cross-sectional view from the main view direction.

[0024] Figure 9 yes Figure 7 A cross-sectional view from the right-hand perspective.

[0025] Figure 10 This is a schematic diagram of the connection structure of the thermostat, engine, and radiator, with arrows indicating the direction of coolant flow.

[0026] Key component symbols: 1-Main body; 11-Outer shell; 111-Inlet; 112-First outlet; 12-Connecting cover; 121-Second outlet; 13-Fixing frame; 131-Connecting piece; 1311-Connecting part; 132-First mounting base; 133-Second mounting base; 134-Support ring plate; 14-Cavity; 15-Limiting groove; 151-First limiting groove; 152-Second limiting groove; 2-Modible rod ; 21-First guide part; 22-Second guide part; 23-Connecting rod; 24-Limiting block; 241-First limiting block; 242-Second limiting block; 3-First sealing cover; 4-Second sealing cover; 5-Drive mechanism; 51-Motor; 52-Screw; 53-Moving plate; 54-First gear; 55-Second gear; 6-Guide rod; 7-Controller; 100-Thermostat; 200-Engine; 300-Radiator. Detailed Implementation

[0027] This invention provides a thermostat for an engine cooling system and a vehicle thereof. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the scope of protection of the invention.

[0028] In the description of this invention, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] See Figure 1 , Figure 2 and Figure 10 A vehicle includes a body, an engine 200, a radiator 300, and a thermostat 100. The engine 200 and radiator 300 are both fixed to the body, and the thermostat 100 is fixed to the engine 200. The thermostat 100 has one inlet 111 and two outlets, referred to as the first outlet 112 and the second outlet 121. The inlet 111 of the thermostat 100 is connected to the coolant outlet of the engine 200, and the first outlet 112 is connected to the coolant inlet 111 of the engine 200, forming a small circulation channel for the engine. The second outlet 121 is connected to the inlet 111 of the radiator 300, and the outlet of the radiator 300 is connected to the coolant inlet 111 of the engine 200, forming a large circulation channel for the engine. By controlling the operation of the thermostat 100, the coolant flows within the small and large circulation channels of the engine, thereby controlling the temperature of the engine 200.

[0031] When the coolant flows in the small circulation channel of the engine, the heat generated by the engine 200 flows back to the engine 200, enabling the engine 200 to heat up quickly. When the coolant flows in the large circulation channel of the engine, the heat generated by the engine 200 flows to the radiator 300 and is dissipated at the radiator 300. The cooled coolant then flows back to the engine 200 and absorbs the heat from the engine 200, thus dissipating the heat from the engine 200.

[0032] See Figures 1-3The thermostat 100 includes a main body 1, a movable rod 2, and a drive mechanism 5. A cavity 14 is formed inside the main body 1, and an inlet 111, a first outlet 112, and a second outlet 121 communicating with the cavity 14 are provided on the main body 1; therefore, after the coolant enters the cavity 14 from the inlet 111, it can be distributed to the first outlet 112 and the second outlet 121.

[0033] The movable rod 2 is located within the cavity 14 and connected to the main body 1, and can move relative to the main body 1. A first sealing cover 3 and a second sealing cover 4 are connected to the movable rod 2. The first sealing cover 3 seals the first water outlet 112, and the second sealing cover 4 seals the second water outlet 121. A drive mechanism 5 is fixed to one side of the main body 1 and is connected to the movable rod 2 via a transmission mechanism. The drive mechanism 5 can drive the movable rod 2 to the position where the first sealing cover 3 seals the first water outlet 112 or the second sealing cover 4 seals the second water outlet 121.

[0034] In the above-described manner, the moving rod 2 is moved by the drive mechanism 5, enabling the thermostat to be in a state where the first sealing cover 3 seals the first outlet 112, the second sealing cover 4 seals the second outlet 121, or the first sealing cover 3 does not seal the first outlet 112 and the second sealing cover 4 does not seal the second outlet 121, thereby adjusting the flow direction of the coolant. Compared with the traditional thermostat 100 that uses paraffin wax as a power source to adjust the flow direction of the coolant, the paraffin wax is consumed over a long period of use, resulting in the paraffin wax's thermal expansion and contraction failing to compress the sealing cover. In the thermostat 100 that uses paraffin wax as a power source to adjust the flow direction of the coolant, a spring is usually configured as a clamping element for the valve of the paraffin wax filling channel. The lifespan of the spring is limited, and after long-term use, the restoring force on the valve will be insufficient. This application uses the drive mechanism 5 as a power source, eliminating the need for paraffin wax and springs, resulting in greater stability and accuracy during long-term operation.

[0035] When the thermostat is in a state where the first sealing cover 3 does not seal the first outlet 112 and the second sealing cover 4 does not seal the second outlet 121, the size of the channel between the first sealing cover 3 and the first outlet 112 and the size of the channel between the second sealing cover 4 and the second outlet 121 can be adjusted by adjusting the position of the movable rod 2, thereby adjusting the ratio of coolant flowing out from the first outlet 112 and the second outlet 121.

[0036] In one embodiment, the movable rod 2, the first water outlet 112, and the second water outlet 121 are coaxially arranged, with the movable rod 2 located between the first water outlet 112 and the second water outlet 121. The first sealing cover 3 and the second sealing cover 4 are respectively disposed at both ends of the movable rod 2. Therefore, when the driving mechanism 5 drives the movable rod 2 to move, the movable rod 2 moves between the first water outlet 112 and the second water outlet 121, thereby controlling the states of the first sealing cover 3 sealing the first water outlet 112, the second sealing cover 4 sealing the second water outlet 121, and the states of the first sealing cover 3 not sealing the first water outlet 112 and the second sealing cover 4 not sealing the second water outlet 121.

[0037] In detail, the first outlet 112 is provided with a first conical section, and the diameter of the end of the first conical section near the cavity 14 is larger than the diameter of the end away from the cavity 14. The first sealing cover 3 is provided with a second conical section that matches the first conical section of the first outlet 112. The moving direction of the first sealing cover 3 is the axial direction of the first conical section. Therefore, during the movement of the first sealing cover 3, the channel size between the first outlet 112 and the first sealing cover 3 can be adjusted.

[0038] Similarly, the second outlet 121 is provided with a third conical section, and the diameter of the end of the third conical section near the cavity 14 is larger than the diameter of the end away from the cavity 14. The second sealing cover 4 is provided with a fourth conical section that matches the third conical section of the second outlet 121. The moving direction of the second sealing cover 4 is the axial direction of the third conical section. Therefore, during the movement of the second sealing cover 4, the channel size between the second outlet 121 and the second sealing cover 4 can be adjusted.

[0039] Since the first sealing cover 3 and the second sealing cover 4 are both connected to the same movable rod 2, the first sealing cover 3 and the second sealing cover 4 move synchronously. When the first sealing cover 3 blocks the first water outlet 112, the channel between the second water outlet 121 and the second sealing cover 4 reaches its maximum position. When the second sealing cover 4 blocks the second water outlet 121, the channel between the first water outlet 112 and the first sealing cover 3 reaches its maximum position.

[0040] The thermostat 100 also includes a controller 7 and a temperature sensor (not shown in the figure). The controller 7 is fixed to the main body 1 and electrically connected to the drive mechanism 5. The temperature sensor is electrically connected to the controller 7, and the controller 7 can control the drive mechanism 5 to operate according to the signal from the temperature sensor. The temperature sensor can be located on the engine 200, in the cavity 14 of the main body 1, or at the water inlet 111 of the main body 1, allowing the temperature sensor to directly detect the temperature of the coolant inside the engine 200. The controller 7 receives the temperature signal from the temperature sensor and then controls the drive mechanism 5 to rotate by a corresponding angle according to a set program. The angle of rotation of the drive mechanism 5 corresponds to the distance the movable rod 2 moves, thus enabling automatic regulation of the coolant flowing from the first outlet 112 and the second outlet 121.

[0041] Among them, the drive mechanism 5 is preferably, but not limited to, a motor that can rotate in both directions. By controlling the forward and reverse rotation of the motor, the movable rod 2 can move between the first outlet 112 and the second outlet 121.

[0042] See Figures 3-6 The main body 1 includes an outer shell 11, a connecting cover 12, and a fixing frame 13. The connecting cover 12 is fixedly connected to the outer shell 11, and a cavity 14 is formed between the connecting cover 12 and the outer shell 11. The fixing frame 13 is provided with a connecting part 1311, which is snapped between the outer shell 11 and the connecting cover 12. The movable rod 2 is slidably connected to the fixing frame 13, thus enabling the main body 1 to be quickly installed, making the thermostat 100 easier to assemble.

[0043] In assembling the thermostat 100, the movable rod 2 is first installed on the fixed frame 13, and the first sealing cover 3 and the second sealing cover 4 are installed on the movable rod 2. Then, the fixed frame 13 is inserted into the cavity 14 of the outer shell 11. At this time, the connecting part 1311 on the fixed frame 13 abuts against the opening of the outer shell 11, and the structure fixes the connecting cover 12 at the opening of the outer shell 11, so that the connecting cover 12 and the outer shell 11 clamp the connecting part 1311, thereby fixing the fixed frame 13. Therefore, it is more convenient to assemble the thermostat 100.

[0044] exist Figure 3 In the illustrated embodiment, the inlet 111 and the first outlet 112 are disposed on the outer casing 11, and the second outlet 121 is disposed on the connecting cover 12. The first outlet 112, the second outlet 121, the movable rod 2, the first sealing cover 3, and the second sealing cover 4 are coaxially arranged, facilitating the generation and positioning of the movable rod 2, the first sealing cover 3, and the second sealing cover 4.

[0045] The inlet 111 is located between the first outlet 112 and the second outlet 121, and the inlet 111 is connected to the middle of the cavity 14, so that the coolant resistance flowing from the inlet 111 to the first outlet 112 and the second outlet 121 is close, which makes it convenient to control the coolant flow rate at the first outlet 112 and the second outlet 121.

[0046] See Figure 6 and Figure 9 The fixed frame 13 is provided with a limiting groove 15, and the movable rod 2 is provided with a limiting block 24, which is placed inside the limiting groove 15. Through the setting of the limiting groove 15 and the limiting block 24, the limiting block 24 cooperates with the limiting groove 15, allowing the movable rod 2 to move only along the direction defined by the limiting groove 15. Furthermore, the range of movement of the movable rod 2 is limited by the limiting groove 15. The range of movement of the movable rod 2 is between the position where the first sealing cover 3 seals the first water outlet 112 and the position where the second sealing cover 4 seals the second water outlet 121, thus preventing the first sealing cover 3 from colliding with the inner wall of the first water outlet 112 and causing damage to the first sealing cover 3, and preventing the second sealing cover 4 from colliding with the inner wall of the second water outlet 121 and causing damage to the second sealing cover 4.

[0047] See Figures 6-9 In detail, the fixing frame 13 includes a first mounting base 132, a second mounting base 133, and a connecting piece 131. One end of the connecting piece 131 is connected to the first mounting base 132, and the other end is connected to the second mounting base 133. A connecting part 1311 is disposed on the connecting piece 131, so that the first mounting base 132, the second mounting base 133, and the connecting piece 131 form an integral structure. Figure 7 In the illustrated embodiment, the first mounting base 132 and the second mounting base 133 are spaced apart. The movable rod 2 is slidably connected to the first mounting base 132 and the second mounting base 133. The connecting piece 131 is connected to the axial outer side of the first mounting base 132 and the second mounting base 133, and forms a space for the drive mechanism 5 to be driven to connect with the movable rod 2. The drive mechanism 5 is driven to connect with the middle part of the movable rod 2. The connecting piece 131 is bent outward at one end of the second mounting base 133 to form a connecting portion 1311.

[0048] The inner wall of the outer casing 11 has at least two steps. When the fixing bracket 13 is inserted into the outer casing 11, the connecting part 1311 abuts against the step near the inside. The connecting cover 12 has a protrusion that mates with the step. When the connecting cover 12 is connected to the outer casing 11, the protrusion presses against the connecting part 1311, thus clamping the connecting part 1311. The outer step abuts against the edge of the connecting cover 12, achieving a seal between the outer casing 11 and the connecting cover 12 to prevent coolant leakage.

[0049] The drive mechanism 5 includes a motor 51, a movable plate 53 fixed on the movable rod 2, the movable plate 53 being located between the first mounting base 132 and the second mounting base 133, a screw 52 being rotatably connected to the fixed frame 13, the movable plate 53 being threadedly connected to the screw 52, ​​and the motor 51 being drively connected to the screw 52. Therefore, under the drive of the motor 51, the screw 52 is driven to rotate, thereby moving the movable plate 53, which in turn drives the movable rod 2 and the first sealing cover 3 and the second sealing cover 4 connected to the movable rod 2 to move.

[0050] See Figures 3-5 The motor 51 and the screw 52 are driven by a gear set, which includes a first gear 54 fixed on the screw 52 and a second gear 55 fixed on the output shaft of the motor 51. The first gear 54 and the second gear 55 mesh. The first gear 54 and the second gear 55 can both be bevel gears, or the first gear 54 and the second gear 55 can be a worm gear structure, so that changing the orientation of the input end of the motor 51, i.e., the output end of the motor 51 is perpendicular to the axis of the screw 52, ​​allows the motor 51 to be mounted on the periphery of the housing 11 and located between the first outlet 112 and the second outlet 121 without affecting the pipe connection on the first outlet 112 and the second outlet 121.

[0051] exist Figure 3 and Figure 5 In the embodiment shown, the drive mechanism 5 includes a motor 51, a screw 52, ​​a moving plate 53, a first gear 54, and a second gear 55, and enables the drive mechanism 5 to drive the movable rod 2 to move.

[0052] A guide rod 6 is also fixed on the fixed frame 13. The axis of the guide rod 6 is parallel to the axis of the screw 52. The guide rod 6 is located on the side of the movable rod 2 away from the screw 52. The movable plate 53 is slidably connected to the guide rod 6. The guide rod 6 guides the movement of the movable plate 53, guiding the movable plate 53 to move along the axis of the screw 52, ​​that is, the first sealing cover 3 and the second sealing cover 4 move closer to / away from the first water outlet 112 and the second water outlet 121.

[0053] exist Figure 5 In the embodiment shown, a limiting part is provided at one axial end of the guide rod 6. The limiting part protrudes from the circumferential surface of the guide rod 6, and the distance between the limiting part and the moving plate 53 is less than or equal to the distance between the first gear 54 and the moving plate 53. When the moving plate 53 exceeds the travel stroke, for example, if the limiting block fails, the moving plate 53 is blocked by the limiting part and will not collide with the first gear 54.

[0054] See Figures 5-9The first mounting base 132 has a first through hole, and the second mounting base 133 has a second through hole. The movable rod 2 passes through the first through hole and the second through hole, and the movable rod 2 can slide relative to the first through hole and the second through hole. Therefore, both the first mounting base 132 and the second mounting base 133 serve as guides for the movable rod 2.

[0055] In detail, the movable rod 2 includes a first guide portion 21, a second guide portion 22, and a connecting rod 23. The connecting rod 23 is connected to the first guide portion 21 at one end in the axial direction and to the second guide portion 22 at the other end. The movable plate 53 is fixed on the connecting rod 23. Dividing the movable rod 2 into three parts—the first guide portion 21, the second guide portion 22, and the connecting rod 23—facilitates the installation of the movable rod 2 on the fixed frame 13.

[0056] For example, the connecting rod 23 is connected to the first guide part 21 by screws or welding, and the connecting rod 23 is threaded to the second guide part 22. When installing the movable rod 2, the first guide part 21 is first set at the first through hole of the first mounting base 132, and the second guide part 22 is set at the second through hole of the second mounting base 133. Then, the connecting rod 23 is placed between the first guide part 21 and the second guide part 22 and threaded to the second guide part 22. The length of the movable rod 2 can be adjusted at the threaded connection between the connecting rod 23 and the second guide part 22, so that within the movement range limited by the limiting groove 15, the first sealing cover 3 can move to the first outlet 112 and the second sealing cover 4 can move to the second outlet 121. Then, the connecting rod 23 is fixedly connected to the first guide part 21 to realize the installation of the movable rod 2.

[0057] The first guide part 21 cooperates with the first through hole, and the second guide part 22 cooperates with the second through hole, so that the first mounting base 132 guides the first guide part 21 and the second mounting base 133 guides the second guide part 22. Therefore, the length required for the movable rod 2 is easy to control when installing the movable rod 2.

[0058] Specifically, the first sealing cover 3 is connected to the side of the first guide portion 21 opposite to the connecting rod 23, and the second sealing cover 4 is connected to the side of the second guide portion 22 opposite to the connecting rod 23. The first sealing cover 3, the first guide portion 21, the connecting rod 23, the second guide portion 22 and the second sealing cover 4 are coaxially arranged.

[0059] The limiting groove 15 includes a first limiting groove 151, which is disposed on the side wall of the first through hole. The length direction of the first limiting groove 151 is arranged along the axial direction of the first through hole. The limiting block 24 includes a first limiting block 241, which is disposed on the circumferential surface of the first guide portion 21 and cooperates with the first limiting groove 151. The limiting groove 15 also includes a second limiting groove 152, which is disposed on the side wall of the second through hole. The length direction of the second limiting groove 152 is arranged along the axial direction of the second through hole. The limiting block 24 also includes a second limiting block 242, which is disposed on the circumferential surface of the second guide portion 22 and cooperates with the second limiting groove 152.

[0060] In one embodiment, the first limiting groove 151 can limit the movement distance of the first guide portion 21, that is, it can limit the movement distance of the first sealing cover 3 and the second sealing cover 4; similarly, the second limiting groove 152 can limit the movement distance of the second guide portion 22, that is, it can limit the movement distance of the first sealing cover 3 and the second sealing cover 4. Therefore, by the cooperation of the first limiting groove 151 and the first limiting block 241, and the cooperation of the second limiting groove 152 and the second limiting block 242, two limiting structures are provided, which provide double limiting protection.

[0061] In some embodiments, the lengths of the first limiting groove 151 and the second limiting groove 152 are greater than the required movement distance of the movable rod 2. Furthermore, the side wall of the first limiting groove 151 opposite to the second sealing cover 4 is used to limit the maximum movement of the first sealing cover 3 towards the first inlet 111, and the side wall of the second limiting groove 152 opposite to the first sealing cover 3 is used to limit the maximum movement of the second sealing cover 4 towards the second inlet 111. Therefore, the mutually opposing side walls of the first limiting groove 151 and the second limiting groove 152 form the range restricting the movement of the movable rod 2. For example, the side wall of the first limiting groove 151 near the second limiting groove 152 communicates with the surface of the first mounting base 132, facilitating the installation of the first guide portion 21 with the first limiting block 241 on the first mounting base 132. Similarly, the side wall of the second limiting groove 152 near the first limiting groove 151 communicates with the surface of the second mounting base 133, facilitating the installation of the second guide portion 22 with the second limiting block 242 on the second mounting base 133.

[0062] In some embodiments, only one of the first limiting block 241 and the second limiting block 242 may be provided, that is, a set of limiting structures may be provided. For example, only the first limiting block 241 and the first limiting groove 151 may be provided, and the first limiting groove 151 shall limit the first limiting block 241 on both sides of the first through hole in the axial direction; or, only the second limiting block 242 and the second limiting groove 152 may be provided, and the second limiting groove 152 shall limit the second limiting block 242 on both sides of the second through hole in the axial direction.

[0063] The mounting bracket 13 also includes a support ring plate 134, which is disposed on the outer circumferential side of the first mounting base 132. That is, the support ring plate 134 protrudes from the outer circumferential side of the first mounting base 132, forming a mounting position for mounting the screw 52 and the guide rod 6. The screw 52 is rotatably connected to the support ring plate 134, and the guide rod 6 is fixed to the support ring plate 134.

[0064] In order not to affect the flow of water from the inlet 111 into the cavity 14 to the first outlet 112 and the second outlet 121, the support ring plate 134 has a first gap with the inner wall of the cavity 14, and the first cavity 14 connects the inlet 111 and the first outlet 112; the second mounting base 133 has a second gap with the outer shell 11, and the second cavity 14 connects the inlet 111 and the second outlet 121.

[0065] Specifically, the fixing bracket 13 is snapped between the outer shell 11 and the connecting cover 12 via the connecting part 1311, so that one end of the fixing bracket 13 with the supporting ring plate 134 is suspended, thus forming a first gap; the second mounting base is configured to be flat, and an avoidance groove is formed on the connecting piece 131 to form a second gap.

[0066] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A thermostat for an engine cooling system, characterized by comprising: The utility model relates to a water temperature regulating valve for engine cooling system, including: a main body with a cavity formed inside, the main body is provided with water inlet, first water outlet and second water outlet which communicate with the cavity; a movable rod is arranged in the cavity and connected with the main body and can move relative to the main body, the movable rod is connected with first sealing cover and second sealing cover, the first sealing cover can seal the first water outlet, and the second sealing cover can seal the second water outlet; a driving mechanism is fixed on one side of the main body and connected with the movable rod, the driving mechanism can drive the movable rod to move to the position that the first sealing cover seals the first water outlet or the position that the second sealing cover seals the second water outlet; the main body includes a shell, a connecting cover and a fixing frame, the connecting cover is fixedly connected with the shell, and the connecting cover and the shell surround the cavity; the movable rod is slidably connected with the fixing frame; the fixing frame includes a first assembly seat, a second assembly seat and a connecting piece, the first assembly seat is spaced apart from the second assembly seat, one end of the connecting piece is connected with the first assembly seat, and the other end is connected with the second assembly seat; the first assembly seat is provided with a first through hole, the second assembly seat is provided with a second through hole, the movable rod penetrates the first through hole and the second through hole, and the movable rod can slide relative to the first through hole and the second through hole.

2. The thermostat for an engine cooling system according to claim 1, characterized by the fixing frame is provided with a connecting part, and the connecting part is clamped between the shell and the connecting cover.

3. The water temperature regulating valve for engine cooling system according to claim 2, wherein the first water outlet is arranged on the shell, and the second water outlet is arranged on the connecting cover; the movable rod, the first water outlet and the second water outlet are coaxially arranged, the movable rod is located between the first water outlet and the second water outlet, and the first sealing cover and the second sealing cover are arranged at two ends of the movable rod respectively; the water inlet is arranged between the first water outlet and the second water outlet, and the water inlet communicates with the middle part of the cavity.

4. The water temperature regulating valve for engine cooling system according to claim 3, wherein the fixing frame is provided with a limiting groove, the movable rod is provided with a limiting block, and the limiting block and the limiting groove are arranged in a matched mode to limit the movement range of the movable rod to be between the position that the first sealing cover seals the first water outlet and the position that the second sealing cover seals the second water outlet.

5. The water temperature regulating valve for engine cooling system according to claim 2, wherein the connecting part is arranged on the connecting piece.

6. The water temperature regulating valve for engine cooling system according to claim 4, wherein the movable rod includes a first guide part, a second guide part and a connecting rod, one end of the connecting rod is fixedly connected with the first guide part in the axial direction, and the other end is threadedly connected with the second guide part; the first guide part is matched with the first through hole, and the second guide part is matched with the second through hole. The first sealing cover is connected to the side of the first guide portion away from the connecting rod, and the second sealing cover is connected to the side of the second guide portion away from the connecting rod.

7. The thermostat for an engine cooling system according to claim 6, characterized in that The limiting groove comprises a first limiting groove and a second limiting groove, the first limiting groove is arranged on the side wall of the first through hole, and the second limiting groove is arranged on the side wall of the second through hole; The limiting block comprises a first limiting block and a second limiting block, the first limiting block is arranged on the circumferential surface of the first guide portion and matched with the first limiting groove, and the second limiting block is arranged on the circumferential surface of the second guide portion and matched with the second limiting groove.

8. The thermostat for an engine cooling system according to claim 7, characterized in that The driving mechanism comprises a motor, a screw rod and a moving plate, the motor is fixed on the shell, the screw rod is rotationally connected to the fixed frame and in transmission connection with the motor, and the moving plate is fixed on the connecting rod and in threaded connection with the screw rod; The fixed frame further comprises a support ring plate, the support ring plate is arranged on the circumferential outer side of the first assembly seat, and the screw rod is rotationally connected to the support ring plate; A guide rod is further fixed on the support ring plate, the guide rod is located on the side of the movable rod away from the screw rod, and the moving plate is in sliding connection with the guide rod.

9. The thermostat for an engine cooling system according to claim 1, characterized by Further comprising: a controller fixed on the main body and in electrical signal connection with the driving mechanism; a temperature sensor in electrical signal connection with the controller, and the controller can control the driving mechanism to work according to the signal of the temperature sensor.

10. A vehicle characterized by comprising: The thermostat comprises a vehicle body, an engine, a radiator and the thermostat according to any one of claims 1-9, the engine and the radiator are both fixed on the vehicle body, the water inlet of the thermostat is in communication with the cooling liquid outlet of the engine, the first water outlet is in communication with the cooling liquid inlet of the engine, the second water outlet is in communication with the water inlet of the radiator, and the water outlet of the radiator is in communication with the cooling liquid inlet of the engine.

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