A temperature sensing integrated thermostat device for oil module

Abstract

The present invention relates to a temperature-sensing integrated thermostat device for use in an oil module, comprising a bracket, a temperature-sensing element assembly and a bypass valve assembly, wherein the bypass valve assembly is arranged on the temperature-sensing element assembly, and the two are integrally installed inside the bracket, the temperature-sensing element assembly comprises a temperature sensing element, a temperature sensing element base and a piston, the temperature sensing element is connected to the head and tail of the piston, and is fixed to the bracket by limiting the temperature sensing element base, the bypass valve assembly comprises a bypass valve plate, a bypass valve seat and a bypass valve spring, one side of the bypass valve plate is connected to the piston, and the other side is connected to the bypass valve spring, the bypass valve seat is sleeved outside the bypass valve spring, and is limitedly connected to the bracket by a retractable limiting component. Compared with the prior art, the present invention can achieve synchronous regulation of temperature and pressure, stable working state, and easy disassembly and maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of automobile engine cooling, and in particular to a temperature-sensing integrated thermostat device used in an engine oil module. Background Art

[0002] At present, many temperature-sensing thermostats and bypass valves used in oil modules are two separate parts, which realize the functions of temperature regulation and pressure regulation respectively. When designing the oil module, the installation positions of the thermostat and the bypass valve are considered separately, which leads to complex design. Generally, the thermostat temperature sensing element is placed behind the thermostat piston. The temperature difference between the oil cooled by the cooler and the oil entering the oil inlet will cause the piston of the thermostat to open frequently during operation and produce oscillation. The traditional temperature-sensing thermostat is divided into upper and lower brackets and valve seats. The upper and lower brackets and the valve seat are fixed by riveting, and fixed to the shell by lifting ears. The installation is cumbersome and not easy to disassemble and maintain. In addition, the piston contact surface is narrow, and it is easy to tip over and get stuck when sliding, so that the thermostat cannot be opened normally, resulting in failure of the thermostat function.

[0003] Patent CN106150659A discloses a wax-type thermostat: an upper bracket, a lower bracket, a main valve, a bypass valve, a sensor, a center rod, a rubber tube and a spring. The upper bracket and the lower bracket of the thermostat are riveted together with the valve seat. The upper end of the center rod is fixed to the center of the upper bracket, and its lower part is inserted into the center hole of the rubber tube. The lower end of the center rod is conical, and the cavity between the rubber tube and the sensor housing is filled with paraffin. The upper and lower parts of the sensor housing are provided with a main valve and a bypass valve that are linked, and there is a vent on the main valve. The bracket of the thermostat is an upper and lower bracket, and the temperature-sensing sensor and the bypass valve are provided separately, which is not conducive to the internal space design of the thermostat, and does not achieve temperature and pressure regulation at the same time.

[0004] Patent CN205370729U discloses an electronic thermostat body bracket, including a body bracket consisting of a sleeve bracket, a bracket valve disc, an exhaust valve, and a long guide hole. The sleeve bracket is inserted into the central hole of the bracket valve disc and combined into one body with an interference fit. The four long guide holes are divided into four equal parts in the circumferential direction and are respectively arranged at the diameter change of the sleeve bracket body. The exhaust valve is arranged on the right side of the annular upper surface of the bracket valve disc. The bracket is not an integrated bracket, and the installation is cumbersome and not easy to disassemble and maintain. The bracket and the shell are connected by an installation notch, and the firmness is not strong. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems and provide a temperature-sensing integrated thermostat device for an oil module, which can achieve synchronous regulation of temperature and pressure, has a stable working state, and is easy to disassemble and maintain.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A temperature-sensing integrated thermostat device for an oil module comprises a shell, a bracket, a temperature-sensing element assembly, a bypass valve assembly and a retractable limit assembly, wherein the temperature-sensing element assembly and the bypass valve assembly are integrally installed inside the bracket and are limited by the retractable limit assembly installed at one end of the bracket, and the bracket is installed in the shell; the temperature-sensing element assembly comprises a temperature sensing element, a temperature sensing element base and a piston, the temperature sensing element base is installed in the bracket, the temperature sensing element is installed in the temperature sensing element base, and the piston is connected to the temperature sensing element; the bypass valve assembly comprises a bypass valve plate, a bypass valve seat and a bypass valve spring, the bypass valve spring is installed in the bypass valve seat, the bypass valve seat is connected to the piston, and is pressed against the piston under the action of the bypass valve spring.

[0008] Furthermore, the bracket is a hollow sleeve structure, including a bracket body and a bracket cover, the bracket cover is arranged at one end of the bracket body, and the bracket body is provided with a plurality of long strip through holes.

[0009] Furthermore, a hollow cavity is provided in the shell, the bracket is installed in the hollow cavity of the shell, and threads are provided on the outer wall of the bracket cover, and the two are detachably connected via the threads.

[0010] Furthermore, the hollow cavity is divided into an oil inlet chamber and an oil outlet chamber by the temperature sensing element assembly and the bypass valve assembly, the temperature sensing element assembly is located on one side of the oil inlet chamber, and the bypass valve assembly and the retractable limit assembly are located on one side of the oil outlet chamber.

[0011] Furthermore, the shell is respectively provided with an oil inlet and a cooler inlet communicated with the oil inlet chamber, and a filter element inlet communicated with the oil outlet chamber.

[0012] Furthermore, an outer edge is provided on the top of the bracket cover, a sealing gasket is provided between the outer edge and the shell, and a sealing ring is also provided between the bracket and the shell.

[0013] Furthermore, the retractable limiting assembly comprises a spring, a spring stopper and a retaining spring which are connected in sequence, the spring is connected to the end of the bypass valve seat, and the retaining spring is connected to the bracket limiter.

[0014] Furthermore, the temperature sensing element is made of a high-temperature expansion material, a push rod is provided at the end of the temperature sensing element, and the piston is installed on the push rod. When the temperature is too high, the temperature sensing element expands, and the piston moves under the action of the push rod to block the oil flow port. The temperature sensing element is not only the wax commonly used in the prior art, but also other temperature-sensitive substances, as long as it can achieve the effect of high-temperature expansion and low-temperature contraction.

[0015] Furthermore, the bracket is provided with a sliding surface for guiding the piston.

[0016] Furthermore, the piston end face is provided with an annular groove, the annular groove is provided with a through hole, the shape of the bypass valve plate is consistent with the annular groove, and under normal circumstances, the bypass valve plate is limited in the annular groove under the action of the bypass valve spring and blocks the through hole.

[0017] The specific working principle of this device is that under normal conditions, the piston is in an open state, that is, when the temperature of the oil introduced through the oil inlet is lower than the set value, the piston does not close the oil flow port under the action of the retractable limit assembly, and the oil entering the housing chamber passes through the bypass valve assembly and then enters the filter element through the filter element inlet; part of the oil enters the cooler through the cooler inlet, and the oil flow rate entering the filter element inlet and the cooler inlet depends on the oil flow rate from the oil inlet.

[0018] When high-temperature engine oil enters the oil inlet (when the engine oil temperature is higher than the set value), the temperature sensing element expands due to the temperature rise, pushing the piston to move, and the piston closes the oil flow port. At this time, the high-temperature engine oil cannot enter the oil outlet chamber from the oil inlet chamber, which prevents the high-temperature engine oil from entering the filter element through the filter element inlet.

[0019] When high-temperature oil is introduced into the oil inlet chamber, the piston seals the oil flow port, and the filter element inlet is in a closed state. If under certain extreme working conditions, such as a failure of the cooler branch (such as blockage), no oil enters the filter element, resulting in no oil available for the engine. This situation should be avoided. The bypass valve assembly in the device plays a role, that is, if this situation occurs, when the pressure difference between the oil inlet and the lubrication end rises to the set opening pressure, the high-pressure oil in the oil inlet chamber acts on the bypass valve plate, the bypass valve plate opens, and the oil directly enters the filter element inlet through the bypass valve assembly, thus avoiding the above-mentioned problem, allowing the engine lubrication system to maintain oil flow, and protecting all parts that need lubrication during engine operation.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention couples the temperature sensing element assembly and the bypass valve assembly together and assembles them in a bracket to form an integral body, which can not only realize the synchronous temperature regulation and pressure regulation functions, but also does not need to consider the installation positions of the temperature sensing element assembly and the bypass valve assembly separately. Therefore, the shell structure for installing the temperature sensing integrated thermostat device is also optimized, saving design space.

[0022] 2. Connect the bypass valve plate to the end of the piston, so that when the temperature sensing element expands due to heat and pushes the piston to slide, the bypass valve is also pushed by the piston to slide. In order to prevent the temperature-sensing integrated thermostat from opening frequently and causing vibration during operation, the temperature sensing element is set in front of the piston, that is, the oil first contacts the temperature sensing element when it enters from the oil inlet. The temperature sensing element only senses the oil temperature coming in from the oil inlet, but not the oil temperature at the filter element inlet, so it will not open frequently due to overly sensitive temperature sensing.

[0023] 3. Threads are set on the bracket and connected to the shell through the threads. There is no need to use separate bolts to fix it, which reduces parts, optimizes the installation process, and facilitates disassembly and maintenance.

[0024] 4. The bracket is formed in one piece, the riveting of the upper and lower brackets is removed, the process is optimized, and a long through hole is provided on the wall for the oil to enter and exit. The long through hole is designed into a "convex" shape according to the installation position of the piston, which is conducive to the contact between the piston and the bracket.

[0025] 5. Widen the contact surface between the piston and the bracket, i.e. the sliding surface. When the piston slides, it can move along the sliding surface, which can effectively prevent the piston from tipping over and getting stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An exploded view of a temperature-sensing integrated thermostat device according to an embodiment of the present invention;

[0027] Figure 2 A cross-sectional view of a temperature-sensing integrated thermostat device according to an embodiment of the present invention;

[0028] Figure 3 It is a cross-sectional view of the piston in the open state;

[0029] Figure 4 It is a cross-sectional view of the piston in the closed state;

[0030] Figure 5 It is a schematic diagram of the working principle;

[0031] In the figure: 1- bracket; 2- temperature sensing element; 3- piston; 4- temperature sensing element base; 5- bypass valve plate; 6- bypass valve seat; 7- bypass valve spring; 8- spring; 9- spring baffle; 10- retaining ring; 11- bracket cylinder; 12- bracket cover; 13- oil inlet; 14- filter element inlet; 15- cooler inlet; 16- long through hole; 17- outer edge; 18- sealing gasket; 19- sealing ring; 20- shell. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example

[0034] Reference Figure 1-4 A temperature-sensing integrated thermostat device for an oil module comprises a shell 20, a bracket 1, a temperature-sensing element assembly, a bypass valve assembly and a retractable limit assembly, wherein a hollow cavity is provided in the shell 20, the bracket 1 is installed in the hollow cavity of the shell 20, the temperature-sensing element assembly and the bypass valve assembly are integrally installed inside the bracket 1, and are limited by the retractable limit assembly installed at one end of the bracket 1, the retractable limit assembly comprises a spring 8, a spring stopper 9 and a retaining spring 10 connected in sequence, the spring is connected to the end of the bypass valve seat 6, and the retaining spring 10 is limitedly connected to the bracket 1.

[0035] The bracket 1 is a hollow sleeve structure, including a bracket cylinder 11 and a bracket cover 12. The bracket cover 12 is arranged at one end of the bracket cylinder 11. The outer wall of the bracket cover 12 is provided with a thread, and the two are detachably connected through the thread. The top of the bracket cover 12 is provided with an outer edge 17, and a sealing gasket 18 is provided between the outer edge 17 and the shell 20. A sealing ring 19 is also provided between the bracket 1 and the shell 20. The bracket cylinder 11 is divided into two sections, and a plurality of long strip through holes 16 are opened on the bracket cylinder 11, so that the bracket communicates with the hollow cavity in the shell 20.

[0036] like Figure 2 The temperature sensing element assembly includes a temperature sensing element 2, a temperature sensing element base 4 and a piston 3. The temperature sensing element base 4 is installed in the bracket 1. The temperature sensing element 2 is installed in the temperature sensing element base 4. The piston 3 is connected to the temperature sensing element 2. The temperature sensing element 2 is made of high-temperature expansion material. A push rod 201 is provided at the end of the temperature sensing element 2. The piston 3 is installed on the push rod 201. The bypass valve assembly includes a bypass valve plate 5, a bypass valve seat 6 and a bypass valve spring 7. The bypass valve spring 7 is installed in the bypass valve seat 6. The bypass valve seat 6 is connected to the piston 3. The end surface of the piston 3 is provided with an annular groove, and the annular groove is provided with a through hole. The shape of the bypass valve plate 5 is consistent with the annular groove. Under normal working conditions, the bypass valve plate 5 is limited in the annular groove under the action of the bypass valve spring 7 and blocks the through hole of the piston 3.

[0037] like Figure 3 The hollow cavity of the housing 20 is divided into an oil inlet chamber on the left and an oil outlet chamber on the right by the temperature sensing element assembly and the bypass valve assembly. The temperature sensing element assembly is located on one side of the oil inlet chamber, and the bypass valve assembly and the telescopic limit assembly are located on one side of the oil outlet chamber. The housing 20 is provided with an oil inlet inlet 13 and a cooler inlet 15 communicating with the oil inlet chamber, and a filter element inlet 14 communicating with the oil outlet chamber.

[0038] The specific working principle of this device is that, under normal conditions, Figure 3, the piston is in the open state, that is, when the temperature of the oil introduced through the oil inlet 13 is lower than the set value, the piston 3 is squeezed to the left under the action of the spring 8 of the telescopic limit assembly, and the oil flow port ( Figure 3 The oil entering the housing chamber passes through the bypass valve assembly and then enters the filter element through the filter element inlet 14; part of the oil enters the cooler through the cooler inlet 15, and the oil flow rate entering the filter element inlet and the cooler inlet depends on the oil flow rate from the oil inlet.

[0039] When high-temperature engine oil is introduced into the oil inlet 13 (when the engine oil temperature is higher than the set value), the temperature sensing element 2 expands due to the temperature rise, and the push rod 201 of the temperature sensing element 2 pushes the piston 3 to move rightward along the sliding surface provided on the bracket 1, and the piston 3 moves Figure 3 The oil flow port at a is closed. At this time, the high-temperature oil cannot enter the oil outlet chamber from the oil inlet chamber, preventing the high-temperature oil from entering the filter element through the filter element inlet, thereby protecting the filter element and ensuring the filtering quality.

[0040] When high-temperature oil is introduced into the oil inlet chamber, the filter inlet 14 is in a closed state. If under certain extreme working conditions, such as a failure (such as blockage) of the cooler branch, no oil enters the filter element, the engine will have no oil to use. This situation should be avoided. The bypass valve assembly in the device plays a role. That is, if this situation occurs, when the pressure difference between one side of the oil inlet chamber and the lubrication end rises to the set opening pressure, the high-pressure oil in the oil inlet chamber acts on the bypass valve plate 5, and the bypass valve plate 5 moves to the right. At this time, the through hole in the middle of the piston 3 opens, and the oil directly enters the filter inlet 14 through the bypass valve assembly. In this way, the above-mentioned problem is avoided, the engine lubrication system is kept with oil, and each component that needs lubrication during engine operation is protected.

[0041] Figure 5 This is a schematic diagram of the working principle of the device specifically applied to the automobile engine module, that is, the engine oil in the oil tank passes through the cooler and the temperature-sensitive integrated thermostat device of the present invention and is filtered through the filter element. After filtration, it is passed into the engine for use, and the used engine oil returns to the oil tank, and the cycle is repeated. The temperature-sensitive integrated thermostat device of the present invention is set to achieve temperature regulation and pressure regulation of the engine oil. The present invention couples the temperature-sensitive element assembly and the bypass valve assembly together, and assembles them in a bracket to form an integral body, which can not only achieve synchronous temperature regulation and pressure regulation functions, but also does not need to consider the installation positions of the temperature-sensitive element assembly and the bypass valve assembly separately, so the shell structure for installing the temperature-sensitive integrated thermostat device is also optimized, saving design space.

[0042] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A temperature-sensing integrated thermostat device for an oil module, characterized in that: The device comprises a housing (20), a bracket (1), a temperature sensing element assembly, a bypass valve assembly and a retractable limiter assembly, wherein the temperature sensing element assembly and the bypass valve assembly are integrally mounted inside the bracket (1) and are limited by the retractable limiter assembly mounted at one end of the bracket (1); The temperature sensing element assembly comprises a temperature sensing element (2), a temperature sensing element base (4) and a piston (3); the temperature sensing element base (4) is installed in the bracket (1), the temperature sensing element (2) is installed in the temperature sensing element base (4), and the piston (3) is connected to the temperature sensing element (2); The bypass valve assembly comprises a bypass valve plate (5), a bypass valve seat (6) and a bypass valve spring (7); the bypass valve spring (7) is installed in the bypass valve seat (6); the bypass valve seat (6) is connected to the piston (3) and is pressed against the piston (3) under the action of the bypass valve spring (7); the telescopic limit assembly comprises a spring (8), a spring stopper (9) and a retaining spring (10) which are connected in sequence; the spring is connected to an end of the bypass valve seat (6); and the retaining spring (10) is connected to the bracket (1) in a limit connection; The support (1) is a hollow sleeve structure, comprising a support cylinder (11) and a support cover (12); the support cover (12) is arranged at one end of the support cylinder (11); and a plurality of long strip-shaped through holes (16) are formed on the support cylinder (11); The housing (20) is provided with a hollow cavity, and the bracket (1) is installed in the hollow cavity of the housing (20); the hollow cavity is divided into an oil inlet chamber and an oil outlet chamber by the temperature sensing element assembly and the bypass valve assembly, the temperature sensing element assembly is located on one side of the oil inlet chamber, and the bypass valve assembly and the telescopic limit assembly are located on one side of the oil outlet chamber; the housing (20) is respectively provided with an oil inlet (13) and a cooler inlet (15) communicating with the oil inlet chamber, and a filter element inlet (14) communicating with the oil outlet chamber; The temperature sensing element (2) is made of a high-temperature expansion material, and a push rod is provided at the end of the temperature sensing element (2), and the piston (3) is installed on the push rod; when high-temperature engine oil is introduced into the oil inlet (13), the temperature sensing element (2) heats up and expands, and the push rod of the temperature sensing element (2) pushes the piston (3) to move, and the piston (3) closes the engine oil flow port, so that the high-temperature engine oil cannot enter the oil outlet chamber from the oil inlet chamber; When high-temperature engine oil flows into the oil inlet chamber and the pressure difference between one side of the oil inlet chamber and the lubrication end rises to a set opening pressure, the high-pressure engine oil in the oil inlet chamber acts on the bypass valve plate (5), and the bypass valve plate (5) moves. At this time, the through hole in the middle of the piston (3) opens, and the engine oil directly enters the filter element inlet (14) through the bypass valve assembly.

2. A temperature-sensing integrated thermostat device for an oil module according to claim 1, characterized in that: The outer wall of the support cover (12) is provided with threads, and the two are detachably connected via the threads.

3. The temperature sensing integrated thermostat device for an oil module according to claim 1, characterized in that: An outer edge (17) is provided at the top of the bracket cover (12), a sealing gasket (18) is provided between the outer edge (17) and the shell (20), and a sealing ring (19) is also provided between the bracket (1) and the shell (20).

4. A temperature sensing integrated thermostat device for an oil module according to claim 1, characterized in that: The bracket is provided with a sliding surface for guiding the piston (3).

5. The temperature sensing integrated thermostat device for an oil module according to claim 1, characterized in that: The piston (3) has an end surface provided with an annular groove, the annular groove having a through hole, the bypass valve plate (5) having a shape consistent with the annular groove, and under normal operating conditions, the bypass valve plate (5) is limited in position within the annular groove under the action of the bypass valve spring (7) and blocks the through hole.

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