Automobile thermostat and engine cooling system

Abstract

The utility model provides an automobile thermostat and an engine cooling system, the thermostat is arranged on a liquid outlet shunting body of a water pump and comprises a valve body, a valve cover, a push rod and a push rod sleeve, and a pipeline I is arranged on the liquid outlet shunting body; the valve body is arranged in the pipeline I, the valve cover covers the opening end of the valve body, and the push rod sleeve is pressed in the valve body; one end of the push rod is inserted into the push rod sleeve, the other end of the push rod extends out of the valve body and is connected with a push rod base arranged on the first pipeline, and a temperature sensing piece is arranged between the valve body and the push rod sleeve. A valve is fixed to the end of the outer side of the valve deck, a sliding piece integrally formed with the valve is arranged on one side of the valve, a large circulation through opening matched with the valve and a small circulation through opening matched with the sliding piece are formed in the first pipeline, the large circulation through opening is communicated with the radiator, and the small circulation through opening is communicated with the engine. The valve and the sliding piece are integrally formed, switching of cooling liquid circulation paths is achieved through one valve, the structure is simplified, manufacturing cost is reduced, and disassembly, assembly and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of thermostats, in particular to an automobile thermostat and also to an engine cooling system. Background Art

[0002] The function of the automobile thermostat is to automatically adjust the circulation volume of the cooling liquid, help the engine cool down, and make the engine work better. The most commonly used thermostat is the wax thermostat. When the cooling temperature is lower than the specified value, the paraffin in the thermostat body is solid, and the thermostat will close the channel between the engine and the radiator. The cooling liquid returns to the engine through the water pump and performs a small circulation in the engine; when the coolant temperature reaches the specified value, the paraffin begins to melt and gradually becomes liquid, and the volume increases and compresses the push rod sleeve to shrink it. The contraction of the push rod sleeve acts on the push rod, and the push rod has a reverse thrust on the valve to open the valve. At this time, the cooling liquid flows back to the engine through the radiator and water pump to perform a large circulation.

[0003] Thermostats are generally divided into mechanical thermostats and electronic thermostats. Electronic thermostats have great advantages in terms of accuracy and response speed, but they are relatively expensive and are related to electromagnetic interference, line interference and other issues. In addition, existing mechanical thermostats generally use paraffin (temperature sensing element) to sense temperature to control the movement of the push rod, and the push rod drives the main valve and auxiliary valve fixed on the push rod to move, thereby switching the small circulation path and the large circulation path; this wax thermostat generally requires two valves to control different paths, and the structure is relatively complex and the cost is high, resulting in cumbersome disassembly and assembly. In addition, due to the thermostat itself, it is generally set in a closed cavity with coolant flowing, which makes its installation and maintenance more troublesome. Utility Model Content

[0004] The utility model aims to provide a thermostat to overcome the deficiencies in the prior art.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: an automobile thermostat, which is arranged on the outlet liquid distributor of the water pump, including a valve body, a valve cover, a push rod, and a push rod sleeve. The outlet liquid distributor is provided with a pipe 1 detachably connected thereto, and a through groove connected to the inside of the outlet liquid distributor is provided at the connection between the outlet liquid distributor and the pipe 1. One end of the pipe 1 is a liquid inlet channel, and the other end is a liquid outlet channel connected to the radiator. A pipe 2 connected to the engine is also provided below the outlet liquid distributor; the valve body is a bottle body with an opening at one end, which is provided on the pipe The valve cover is closed on the open end of the valve body, and the push rod sleeve is pressed into the valve body; one end of the push rod is inserted into the push rod sleeve, and the other end extends out of the valve body and is connected to the push rod seat arranged on the pipe one, and a temperature sensing part is arranged between the valve body and the push rod sleeve; a valve is fixed on the outer end of the valve cover, and a sliding plate integrally formed with the valve is arranged on one side of the valve, and a large circulation port cooperating with the valve and a small circulation port cooperating with the sliding plate are arranged on the pipe one, the large circulation port is communicated with the liquid outlet channel, and the small circulation port is located above the through groove and is communicated with the pipe two.

[0006] Furthermore, the above-mentioned automobile thermostat also includes a spring and a support. The spring is sleeved on the outside of the valve body, one end of which is fixedly connected to the valve body, and the other end is fixedly connected to the support. The end of the valve body away from the opening is inserted into the support and slidably connected to the support. The support is rested on the supporting boss of pipe one through a spring.

[0007] Furthermore, in the above-mentioned automobile thermostat, the valve is a disc, and when closed, the large circulation opening is closed through the circular plane.

[0008] Furthermore, in the above-mentioned automobile thermostat, the slide is an arc-shaped plate extending along the side of the valve, an arc-shaped slide groove is provided on the pipe, the slide is embedded in the slide groove and is slidably connected to the slide groove, and the small circulation port is provided at one end of the slide groove away from the large circulation port.

[0009] Furthermore, in the above-mentioned automobile thermostat, the valve cover is arranged at the open end of the valve body and is fixedly connected to the valve body by riveting; the valve cover also cooperates with the push rod sleeve to seal the open end of the valve body.

[0010] Furthermore, in the above-mentioned automobile thermostat, the open end of the valve body is provided with a step, one end of the push rod sleeve is provided with a sealing portion, and the other end is a telescopic portion, and the sealing portion is pressed onto the step through the valve cover.

[0011] Furthermore, in the above-mentioned automobile thermostat, a sealing surface 1 is provided on the outer side of the sealing portion, and the sealing surface 1 includes a plurality of arcuate surfaces arranged in an S shape and an inclined surface. A sealing surface 2 is provided on the inner side of the valve cover, and the sealing surface 2 is arranged opposite to the sealing surface 1, and also includes a plurality of arcuate surfaces arranged in an S shape and an inclined surface, and the sealing surface 2 is interference fit with the sealing surface 1.

[0012] Furthermore, in the above-mentioned automobile thermostat, a slot is provided on one side of the pipe corresponding to the through groove, a socket is provided on the slot to be plugged therein, the push rod seat is fixed on the socket, and the small circulation port is provided on the socket.

[0013] Furthermore, in the above-mentioned automobile thermostat, the through groove is a stepped groove with a larger upper portion and a smaller lower portion, and a mounting seat matching the through groove is provided on the outer side of the pipe, and the lower end of the mounting seat is embedded in the large groove at the upper end of the through groove, and is detachably connected to the liquid outlet body through a fastener provided on the mounting seat; the bottom surface of the socket abuts against the stepped surface of the through groove. In addition, a sealing member is also embedded on the stepped surface of the through groove.

[0014] The utility model also provides an engine cooling system, comprising: a radiator, the above-mentioned automobile thermostat, wherein the large circulation port of the thermostat is connected to the radiator, and the small circulation port of the thermostat is connected to the engine through a second pipeline.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the valve and the slide are integrally formed in the utility model, and the coolant circulation path is switched through one valve, and there is no need to set two valves at different positions, which simplifies the structure and reduces the assembly difficulty and manufacturing cost of the valve. In addition, the thermostat is easy to disassemble and maintain on the car, which solves the problem of inconvenient disassembly and assembly in a sealed space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the external structure of the automobile thermostat of the utility model;

[0018] Figure 2 It is a side view structural diagram of the automobile thermostat of the utility model;

[0019] Figure 3 for Figure 2 A cross-sectional schematic diagram;

[0020] Figure 4 for Figure 3 B is an enlarged schematic diagram;

[0021] Figure 5 This is a schematic diagram of the internal structure of a pipeline of an automobile thermostat of the utility model;

[0022] Figure 6 Thermostat structure diagram of the utility model automobile thermostat

[0023] Figure 7 It is a partial structural schematic diagram of the automobile thermostat of the utility model;

[0024] Figure 8 This is a schematic diagram of the push rod cover structure of the automobile thermostat of the utility model;

[0025] In the figure: 100, thermostat; 200, water pump;

[0026] 11. liquid outlet and distribution body; 111. through groove; 12. pipeline 1; 121. large circulation opening; 122. small circulation opening; 123. slide groove; 124. supporting boss; 125. slot; 126. socket; 127. mounting seat; 13. pipeline 2;

[0027] 2. Valve body; 21. Step; 3. Valve cover; 31. Sealing surface 2; 4. Push rod; 5. Push rod sleeve; 51. Sealing part; 52. Sealing surface 1; 6. Push rod seat; 7. Valve; 8. Sliding vane; 9. Spring; 10. Support. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example 1

[0030] like Figure 1-8As shown, a car thermostat 100 is arranged on the liquid outlet flow divider 11 of the water pump 200, including a valve body 2, a valve cover 3, a push rod 4, and a push rod sleeve 5. The liquid outlet flow divider 11 is provided with a pipe 12 detachably connected thereto, and a through groove 111 connected to the inside of the liquid outlet flow divider 11 is provided at the connection between the liquid outlet flow divider 11 and the pipe 12. One end of the pipe 12 is a liquid inlet channel, and the other end is a liquid outlet channel connected to the radiator. A pipe 2 13 connected to the engine is also provided below the liquid outlet flow divider 11; the valve body 2 is a bottle body with an opening at one end, which is arranged inside the pipe 12, and the valve cover 3 covers the opening of the valve body 2. The push rod sleeve 5 is pressed into the valve body 2; one end of the push rod 4 is inserted into the push rod sleeve 5, and the other end extends out of the valve body 2 and is connected with the push rod seat 6 arranged on the pipe 12; a temperature sensing component is provided between the valve body 2 and the push rod sleeve 5, and in this embodiment, the temperature sensing component is paraffin; a valve 7 is fixed to the outer end of the valve cover 2, and a slide 8 is provided on one side of the valve 7 which is integrally formed therewith; a large circulation port 121 cooperating with the valve 7 and a small circulation port 122 cooperating with the slide 8 are provided on the pipe 12, the large circulation port 121 is connected with the liquid outlet channel, and the small circulation port 122 is located above the through groove 111 and is connected with the pipe 2 13.

[0031] When working, the coolant flows from the liquid inlet channel into the pipe 12 and contacts the valve body 2. When the temperature is low, the valve plate 7 closes the large circulation port 121, and the small circulation port 122 is in an open state. The coolant flows from the small circulation port 122 into the pipe 2 13 and the engine in turn, and the small circulation of the coolant is carried out; when the temperature rises, the temperature sensing element expands and squeezes the push rod 4. The valve body 2 moves toward the small circulation port 122 under the reverse thrust of the push rod 4. As the valve body 2 moves, the valve 7 opens the large circulation port 121, and the slide plate 8 closes the small circulation port 122. The coolant flows from the large circulation port 121 into the liquid outlet channel and the radiator in turn, and the large circulation of the coolant is carried out, thereby realizing the switching of the coolant circulation path through this thermostat. In the utility model, the valve 7 and the slide plate 8 are integrally formed, and the switching of the coolant circulation path is realized through one valve, and there is no need to set two valves at different positions, which simplifies the structure and reduces the assembly difficulty and manufacturing cost of the valve.

[0032] like Figure 3-6As shown, the above-mentioned automobile thermostat 100 also includes a spring 9 and a support 10. The spring 9 is sleeved on the outside of the valve body 2, one end of which is fixedly connected to the valve body 2, and the other end is fixedly connected to the support 10. The end of the valve body 2 away from the opening is inserted into the support 9 and slidably connected to the support 9. The support 9 guides the movement of the valve body 2, thereby ensuring the moving direction of the slide 8; the support 10 is abutted against the supporting boss 124 of the pipe 12 through the spring 9. When disassembling and maintaining, the thermostat 100 can be removed as a whole by simply pulling out the push rod 4 from the push rod seat. No other installation or matching is required, and disassembly and assembly are simple and convenient.

[0033] Further, in order to facilitate disassembly and assembly, Figure 1-4 As shown, the side of the pipe 12 is provided with a slot 125 corresponding to the through groove 111, and the slot 125 is provided with a socket 126 plugged therewith, the push rod seat 6 is fixed on the socket 126, and the small circulation port 122 is also provided on the socket 126. The through groove 111 is a stepped groove with a large top and a small bottom, and the outer side of the pipe 12 is provided with a mounting seat 127 matched with the through groove 111, and the lower end of the mounting seat 127 is set in the large groove at the upper end of the through groove 111, and is detachably connected to the liquid outlet flow divider 11 through a fastener provided on the mounting seat 127; the bottom surface of the socket 126 abuts against the step surface of the through groove 111; in addition, a sealing member is also set on the step surface of the through groove 111 to ensure the sealed connection between the pipe 12 and the liquid outlet flow divider 11.

[0034] During installation, the thermostat 100 is first installed on the socket 126, and then the whole is inserted into the pipe 12, and finally the pipe 12 is installed on the liquid outlet flow distributor 11. The through groove 111 can roughly position the pipe 12, and then it is completely positioned by the fasteners. When maintenance is required, it is only necessary to remove the fasteners on the mounting seat 127, and then pull out the socket 125 from the slot 125, and then pull out the push rod 4 from the push rod seat 6 to remove the thermostat 100 as a whole, which solves the problem of inconvenient disassembly and assembly in a sealed space, and is convenient for disassembly and assembly and maintenance. In addition, the installation of the thermostat 100 and the pipe 12 only lies in the connection between the push rod 4 and the push rod seat 6, and no other installation or matching is required, so the disassembly and assembly are simple and convenient.

[0035] Example 2

[0036] Based on the structure of Example 1, Figure 4-7 As shown, the valve 7 is a disc, and when closed, the large circulation port 121 is closed through a circular plane. When closed, the disc can completely cover the large circulation port 121 and exceed the large circulation port 121, which is a surface seal. Compared with a line seal, it has better sealing performance and makes the path switching of the liquid more accurate.

[0037] In addition, if Figure 4-7As shown, the slide 8 is an arc-shaped plate extending along the side of the valve 7, and the pipe 12 is provided with an arc-shaped slide groove 123. The slide 8 is set in the slide groove 123 and is slidably connected with the slide groove 123. The small circulation port 122 is provided at one end of the slide groove 123 away from the large circulation port 121. When closed, the slide 8 can completely cover the small circulation port 122 and exceed the small circulation port 122. It is a surface seal, which has better sealing performance than a line seal, making the path switching of the liquid more accurate.

[0038] Among them, Figure 4-7 As shown, the valve cover 3 is arranged at the open end of the valve body 2 and is fixedly connected to the valve body 2 by riveting; the valve cover 3 also cooperates with the push rod sleeve 5 to seal the open end of the valve body 2 to prevent paraffin leakage.

[0039] Specifically, Figure 4-8 As shown, the open end of the valve body 2 is provided with a step 21, one end of the push rod sleeve 5 is provided with a sealing portion 51, and the other end is a telescopic portion, and the sealing portion 51 is pressed onto the step 21 through the valve cover 3. The outer side of the sealing portion 51 is provided with a sealing surface 1 52, and the sealing surface 1 52 includes a plurality of arcuate surfaces arranged in an S shape and an inclined surface, and the inner side of the valve cover 3 is provided with a sealing surface 2 31, and the sealing surface 2 31 is arranged opposite to the sealing surface 1 52, and also includes a plurality of arcuate surfaces arranged in an S shape and an inclined surface, and the sealing surface 2 31 is interference fit with the sealing surface 1 52. Through the sealing of the sealing surface 1 52 and the sealing surface 2 31, the sealing effect of the valve body 2 can be ensured, paraffin leakage can be avoided, and thus the failure of the temperature-controlled diverter valve can be avoided.

[0040] The utility model also provides an engine cooling system, comprising: a radiator, and the automobile thermostat 100 as described above, wherein the large circulation port 121 of the thermostat 100 is connected to the radiator, and the small circulation port 122 of the thermostat is connected to the engine through a pipe 13.

[0041] When the temperature is low, the valve plate 7 closes the large circulation port 121, and the small circulation port 122 is in an open state, and the coolant flows from the small circulation port 122 into the pipe 2 13 and the engine in sequence, thereby performing a small circulation of the coolant; when the temperature rises, the temperature sensing component expands and squeezes the push rod 4, and the valve body 2 moves toward the small circulation port 122 under the action of the reverse thrust of the push rod 4. As the valve body 2 moves, the valve 7 opens the large circulation port 121, and the sliding plate 8 closes the small circulation port 122, and the coolant flows from the large circulation port 121 into the liquid outlet channel and the radiator in sequence, thereby performing a large circulation of the coolant.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automobile thermostat, characterized in that: The thermostat is arranged on the liquid outlet diverter body of the water pump, and includes a valve body, a valve cover, a push rod, and a push rod sleeve. The liquid outlet diverter body is provided with a pipe 1 detachably connected to it, and a through groove connected to the inside of the liquid outlet diverter body is provided at the connection between the liquid outlet diverter body and the pipe 1, one end of the pipe 1 is a liquid inlet channel, and the other end is a liquid outlet channel connected to the radiator, and a pipe 2 connected to the engine is also provided below the liquid outlet diverter body; the valve body is arranged inside the pipe 1, the valve cover is covered on the open end of the valve body, and the push rod sleeve is pressed into the valve body; one end of the push rod is inserted into the push rod sleeve, and the other end extends out of the valve body and is connected to the push rod seat arranged on the pipe 1, and a temperature sensing part is provided between the valve body and the push rod sleeve; a valve is fixed to the outer end of the valve cover, and a sliding plate integrally formed with the valve is provided on one side of the valve, and a large circulation port cooperating with the valve and a small circulation port cooperating with the sliding plate are provided on the pipe 1, the large circulation port is communicated with the liquid outlet channel, and the small circulation port is located above the through groove and communicated with the pipe 2.

2. The automobile thermostat according to claim 1, characterized in that: It also includes a spring and a support. The spring is sleeved on the outside of the valve body, one end of which is fixedly connected to the valve body and the other end is fixedly connected to the support. The end of the valve body away from the opening is inserted into the support and slidably connected to the support. The support is pressed against the supporting boss of the pipe through the spring.

3. The automobile thermostat according to claim 2, characterized in that: The valve is a disc, and when closed, the large circulation opening is closed through the circular plane.

4. The automotive thermostat according to claim 1, characterized in that: The slide is an arc-shaped plate extending along the side of the valve, an arc-shaped slide groove is provided on the pipeline, the slide is embedded in the slide groove and is slidably connected to the slide groove, and the small circulation port is provided at one end of the slide groove away from the large circulation port.

5. The automotive thermostat according to claim 1, characterized in that: The valve cover is arranged at the open end of the valve body and is fixedly connected to the valve body by riveting; the valve cover also cooperates with the push rod sleeve to seal the open end of the valve body.

6. The automobile thermostat according to claim 5, characterized in that: The opening end of the valve body is provided with a step, one end of the push rod sleeve is provided with a sealing part, and the other end is a telescopic part, and the sealing part is pressed onto the step through the valve cover.

7. The automobile thermostat according to claim 6, characterized in that: A sealing surface 1 is provided on the outer side of the sealing part, and the sealing surface 1 includes multiple arcuate surfaces and an inclined surface arranged in an S shape. A sealing surface 2 is provided on the inner side of the valve cover, and the sealing surface 2 is arranged opposite to the sealing surface 1, and also includes multiple arcuate surfaces and an inclined surface arranged in an S shape, and the sealing surface 2 is interference fit with the sealing surface 1.

8. The automobile thermostat according to claim 1 or 4, characterized in that: A slot corresponding to the through groove is provided on one side of the pipeline, a socket plugged therein is provided on the slot, the push rod seat is fixed on the socket, and the small circulation port is provided on the socket.

9. The automobile thermostat according to claim 8, characterized in that: The through groove is a stepped groove that is larger at the top and smaller at the bottom. A mounting seat that matches the through groove is provided on one outer side of the pipe. The lower end of the mounting seat is embedded in the large groove at the upper end of the through groove and is detachably connected to the liquid outlet flow divider through a fastener provided on the mounting seat; the bottom surface of the socket abuts against the stepped surface of the through groove.

10. An engine cooling system, characterized in that: It comprises a radiator and an automobile thermostat as claimed in any one of claims 1 to 9, wherein the large circulation port of the thermostat is connected to the radiator, and the small circulation port of the thermostat is connected to the engine through a second pipe.

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