Thermostat cover and thermostat assembly

Abstract

This disclosure provides a thermostat cover and a thermostat assembly, belonging to the field of automotive parts technology. The thermostat cover includes a cover body and two nested parts. The cover body has a cavity, two pre-embedded holes, and a sealing groove. The cavity is connected to the coolant inlet pipe. The two nested parts are respectively fixed to the two pre-embedded holes, and the cover body is connected to the thermostat seat through the nested parts. The sealing groove is located on the top surface of the cover body, surrounds the cavity, and is located between the two pre-embedded holes. The closer the cover body is to the pre-embedded holes, the greater the connecting force it experiences, resulting in greater deformation, and correspondingly, greater deformation of the sealing groove. Along the direction away from the first reference line A, the bottom wall of the sealing groove gradually decreases. The first reference line A is perpendicular to the line connecting the two pre-embedded holes and perpendicular to the axis of the sealing groove. This compensates for the problem of inconsistent compression of the sealing ring caused by inconsistent deformation of the sealing groove, making the compression of the sealing ring more uniform throughout, thereby ensuring the sealing effect of the sealing ring.

Description

Technical Field

[0001] This disclosure relates to the field of automotive parts technology, and in particular to a thermostat cover and thermostat assembly. Background Technology

[0002] The thermostat is an important component in a vehicle's cooling system, used to regulate the cooling system's heat dissipation capacity and ensure the engine operates within a suitable temperature range. The thermostat consists of a thermostat cover, a thermostat seat, and a thermostat body. The thermostat cover is connected to the thermostat seat to form a cavity, and a sealing ring is present between the thermostat body and the thermostat cover. The thermostat body is located inside the cavity.

[0003] In related technologies, the thermostat cover includes a cover body and a nest, with the nest fixed in pre-embedded holes on both sides of the cover body. The nest is used to insert bolts, allowing the cover body to connect to the thermostat base. The side of the cover body that connects to the thermostat has a sealing groove for accommodating a sealing ring, thereby ensuring a seal between the cover body and the thermostat base.

[0004] However, due to the pressure from the bolts at the nesting point, the pressure on the sealing groove is greater closer to the nesting point, resulting in greater compression closer to the nesting point. This, in turn, leads to uneven compression across the sealing ring, thus reducing its sealing effectiveness. Summary of the Invention

[0005] This disclosure provides a thermostat cover and a thermostat assembly, which can solve the technical problems existing in the related art. The technical solutions of the thermostat cover and thermostat assembly are as follows.

[0006] In a first aspect, this disclosure provides a thermostat cover, the thermostat cover including a cover body and two nests, the cover body having a cavity, two pre-embedded holes and a sealing groove;

[0007] The cavity is used to connect to the coolant inlet pipe;

[0008] The two pre-embedded holes are arranged on both sides of the cavity, and the two nests are respectively fixed to the two pre-embedded holes. The cover is used to connect to the thermostat seat through the nests.

[0009] The sealing groove is located on the top surface of the cover, the sealing groove surrounds the cavity and is located between the two pre-embedded holes, wherein the top surface is the side of the cover used to connect with the thermostat seat;

[0010] Along a direction away from the first baseline, the bottom wall of the sealing groove gradually decreases, wherein the first baseline is perpendicular to the line connecting the two pre-embedded holes and perpendicular to the axis of the sealing groove.

[0011] In one possible implementation, the height difference D between the highest and lowest points of the bottom wall of the sealing groove is 0.25mm-0.35mm.

[0012] In one possible implementation, the bottom wall of the sealing groove is symmetrical about a first reference line A.

[0013] In one possible implementation, the top surface of the cover gradually decreases along a direction away from the first baseline A.

[0014] In one possible implementation, the distance between the bottom wall of the sealing groove and the top surface of the cover is the same.

[0015] In one possible implementation, the side of the cover facing away from the top surface has reinforcing ribs;

[0016] Along the direction close to the first baseline A, the protruding length H of the reinforcing rib gradually increases.

[0017] In one possible implementation, the reinforcing rib is symmetrical about the first reference line A.

[0018] In one possible implementation, the nesting includes a middle section and two ends;

[0019] The diameter of the middle portion is smaller than the diameter of the two ends, and the middle portion is located between the two ends.

[0020] In one possible implementation, the outer wall of at least one of the ends has a plurality of grooves, which are evenly distributed circumferentially along the end.

[0021] In one possible implementation, the groove is a V-shaped groove.

[0022] In one possible implementation, the groove is a U-shaped groove.

[0023] In one possible implementation, the nested sidewalls have openings that extend axially through the nest.

[0024] In one possible implementation, the rounded corners corresponding to the nested cross-sections are 240°.

[0025] In a second aspect, this disclosure provides a thermostat assembly, the thermostat assembly including a thermostat base, a thermostat body and a thermostat cover as described in any of the first aspects;

[0026] The thermostat cover is connected to the thermostat base, and there is a receiving cavity between the thermostat cover and the thermostat base, with the thermostat body located in the receiving cavity.

[0027] The technical solution provided in this disclosure includes at least the following beneficial effects:

[0028] This disclosure provides a thermostat cover with a sealing groove in the cover body to accommodate a sealing ring, thereby achieving a seal between the cover body and the thermostat base. Because the cover body and the thermostat base are nested together, the pressure at the pre-embedded hole is relatively high. Therefore, the pressure and deformation of the sealing groove are greater closer to the pre-embedded hole. Along the direction away from the first reference line, the bottom wall of the sealing groove gradually decreases. This compensates for the inconsistent compression of the sealing ring caused by uneven deformation of the sealing groove, resulting in more uniform compression of the sealing ring throughout, thus ensuring the sealing effect of the sealing ring.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings:

[0031] Figure 1 This is an exploded view of a thermostat cover shown in an embodiment of this disclosure;

[0032] Figure 2 This is a schematic diagram of the structure of a cover shown in an embodiment of this disclosure;

[0033] Figure 3 This is a cross-sectional view of a cover body shown in an embodiment of this disclosure;

[0034] Figure 4 This is a cross-sectional view of a cover body shown in an embodiment of this disclosure;

[0035] Figure 5 This is a schematic diagram of the structure of a cover shown in an embodiment of this disclosure;

[0036] Figure 6 This is a schematic diagram of the structure of a cover shown in an embodiment of this disclosure;

[0037] Figure 7 This is a schematic diagram of a nested structure shown in an embodiment of this disclosure.

[0038] Legend:

[0039] 1. Cover, 1a. Top surface;

[0040] 101. Pipe body;

[0041] 102. Cover body;

[0042] 10. Cavity;

[0043] 11. Pre-embedded holes;

[0044] 12. Sealing groove; 121. Bottom wall;

[0045] 13. Reinforcing ribs;

[0046] 2. Nesting;

[0047] 21. Middle section;

[0048] 22. End;

[0049] 23. Opening;

[0050] 220. Groove.

[0051] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings.

[0053] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0054] The thermostat is an important component in a vehicle's cooling system, used to regulate the cooling system's heat dissipation capacity and ensure the engine operates within a suitable temperature range. The thermostat consists of a thermostat cover, a thermostat seat, and a thermostat body. The thermostat cover is connected to the thermostat seat to form a cavity, and a sealing ring is present between the thermostat body and the thermostat cover. The thermostat body is located inside the cavity.

[0055] In related technologies, the thermostat cover includes a cover body and a nest, with the nest fixed in pre-embedded holes on both sides of the cover body. The nest is used to insert bolts, allowing the cover body to connect to the thermostat base. The side of the cover body that connects to the thermostat has a sealing groove for accommodating a sealing ring, thereby ensuring a seal between the cover body and the thermostat base.

[0056] However, due to the pressure from the bolts at the nesting point, the pressure on the sealing groove is greater closer to the nesting point, resulting in greater compression closer to the nesting point. This, in turn, leads to uneven compression across the sealing ring, thus reducing its sealing effectiveness.

[0057] In view of the above-mentioned technical problems, embodiments of this disclosure provide a thermostat cover, such as... Figure 1 and Figure 2 As shown, the thermostat cover includes a cover body 1 and two nests 2. The cover body 1 has a cavity 10, two pre-embedded holes 11, and a sealing groove 12. The cavity 10 is used to communicate with the coolant inlet pipe. The two pre-embedded holes 11 are located on both sides of the cavity 10, and the two nests 2 are respectively fixed to the two pre-embedded holes 11. The cover body 1 is used to connect to the thermostat base through the nests 2. The sealing groove 12 is located on the top surface 1a of the cover body 1, surrounds the cavity 10, and is located between the two pre-embedded holes 11. The top surface 1a is the side of the cover body 1 used for connection with the thermostat base. Figure 3 and Figure 4 As shown, the bottom wall of the sealing groove 12 gradually decreases along the direction away from the first reference line A. The first reference line A is perpendicular to the line B connecting the two pre-embedded holes 11 and also perpendicular to the axis O of the sealing groove 12.

[0058] It should be noted that, in order to highlight the shape of the sealing groove 12, Figure 4 right Figure 3 The shape of the bottom wall of the sealing groove 12 in the design is exaggerated. In the actual product, the degree of reduction in the bottom wall of the sealing groove 12 along the direction away from the first reference line A is smaller.

[0059] When the thermostat cover is connected to the thermostat base, the bolt passes through the nest 2 to fix the thermostat cover and the thermostat base together.

[0060] like Figure 1 and Figure 2As shown, the cover 1 is an integral structure, comprising a cover body 101 and a tube 102. The cover body 101 has a cavity 10, and the tube 102 has a channel. The cavity 10 communicates with the channel, and the channel communicates with the coolant inlet pipe. Pre-embedded holes 11 and sealing grooves 12 are located within the cover body 101. The cover body 101 is rhomboid in shape. The line B connecting the first baseline A and the two pre-embedded holes 11 can be considered the axis of symmetry of the cover body 101. The length of the cover body 101 along the direction of the first baseline A is shorter, while its length along the direction of the line B connecting the two pre-embedded holes 11 is longer.

[0061] The material of the cover 1 is plastic. Specifically, the material of the cover 1 can be a composite material composed of PA66 (Polyamide 66) and GF30 (Glass Fiber 30), namely PA66+GF30. PA66+GF30 has excellent mechanical properties and high temperature resistance, which can meet the requirements of automobiles in high-speed driving and high-temperature environments.

[0062] The bottom wall of the sealing groove 12 can also be considered as gradually decreasing in the direction close to the pre-embedded hole 11, that is, the distance between the bottom wall of the pre-embedded hole 11 and the thermostat seat is shorter the closer to the pre-embedded hole 11. The sealing groove 12 is arc-shaped and protrudes in the direction away from the tube body 102. The bottom wall of the sealing groove 12 can be considered as having a pre-deformation structure, that is, in order to reduce the large deformation of the sealing groove 12 near the pre-embedded hole 11, the sealing groove 12 is pre-set with a deformation in the opposite direction near the pre-embedded hole 11, thereby compensating for the problem of inconsistent deformation at various points after the cover 1 is connected to the thermostat seat.

[0063] Nest 2 is made of metal, such as copper or aluminum alloy.

[0064] The technical solution provided in this embodiment ensures the sealing performance between the thermostat cover and the thermostat base by setting the bottom wall 121 of the sealing groove 12 to different heights. Since the cover 1 and the thermostat base are connected by two pre-embedded holes 11 located on both sides of the sealing groove 12, the closer the cover 1 is to the pre-embedded hole 11 (away from the first reference line A), the greater the connecting force it experiences. This results in greater deformation of the cover 1 closer to the pre-embedded hole 11, and consequently, greater deformation of the sealing groove 12. Along the direction away from the first reference line A, the bottom wall of the sealing groove 12 gradually decreases. This compensates for the inconsistent compression of the sealing ring caused by the inconsistent deformation of the sealing groove 12, making the compression of the sealing ring more uniform throughout, thereby ensuring the sealing effect of the sealing ring.

[0065] The cover 1 will now be described by way of example.

[0066] In some examples, such as Figure 4As shown, the height difference D between the highest and lowest points of the bottom wall of the sealing groove 12 is 0.25mm-0.35mm. According to the simulation results, setting D to 0.25mm-0.35mm can ensure that the bottom walls of the sealing groove 12 are on the same plane after the thermostat cover and thermostat seat are connected. This ensures that the compression of the sealing ring is consistent throughout, thus achieving the best sealing effect and preventing coolant leakage from the connection between the cover 1 and the thermostat seat.

[0067] Of course, in other examples, D may be set to other dimensions depending on the size and material of the sealing groove 12, and this disclosure does not specifically limit this.

[0068] In some examples, such as Figure 2 As shown, the sealing groove 12 is symmetrically arranged about the first reference line A. Since the pressure at the two pre-embedded holes 11 is the same after the cover 1 and the thermostat seat are connected, the pressure on the sealing groove 12 on both sides of the first reference line A is also the same. Therefore, the deformation of the cover 1 on both sides of the first reference line A is the same. Setting the sealing groove 12 symmetrically about the first reference line A ensures that the bottom of the sealing groove 12 is a plane after the cover 1 and the thermostat seat are connected. This makes the compression of the sealing ring symmetrical about the first reference line A, thus making the compression of the sealing ring as consistent as possible and further improving the sealing effect of the sealing ring.

[0069] In related technologies, the closer the cover 1 is to the pre-embedded hole 11 (away from the first reference line A), the greater the connecting force it experiences, resulting in greater deformation of the cover 1 closer to the pre-embedded hole 11. This makes the connection between the cover 1 near the pre-embedded hole 11 and the thermostat seat more tight. However, the pressure experienced by the cover 1 near the first reference line A is smaller, which may create a small gap between the top surface 1a of the cover 1 and the thermostat seat. This leads to poor sealing between the top surface 1a of the cover 1 and the thermostat seat, causing coolant to leak from the gap.

[0070] Therefore, in some examples, such as Figure 3 and Figure 4 As shown, along the direction away from the first reference line A, the top surface 1a of the cover 1 gradually decreases. It can also be seen that the top surface 1a is arched and protrudes in the direction away from the tube body 102.

[0071] In this way, when the cover 1 is connected to the thermostat seat, it first contacts the thermostat seat near the first reference line A. At this time, there is a small gap between the cover 1 and the thermostat seat around the pre-embedded hole 11. Then, bolts are used to pass through the nest 2 to connect the cover 1 and the thermostat seat. At this time, the cover 1 around the pre-embedded hole 11 will be subjected to the pressure of the bolts, thereby eliminating the original gap between the cover 1 and the thermostat seat, and thus making the cover 1 and the thermostat seat tightly connected. This can prevent coolant from leaking between the cover 1 and the thermostat seat, so that the thermostat can operate normally.

[0072] It should be noted that, in order to highlight the shape of cover 1, Figure 4 right Figure 3 The shape of the cover 1 in the image is exaggerated. In the actual product, the height of the cover 1 varies slightly along the direction away from the first reference line A.

[0073] In some examples, such as Figure 4 As shown, the height difference L between the highest and lowest points of the top surface 1a of the cover 1 is 0.25mm-0.3mm.

[0074] Of course, in other examples, the size of L can also be set according to the size and material of the cover 1, and this disclosure does not specifically limit this.

[0075] In other examples, the top surface 1a of the cover 1 may also be a plane.

[0076] In some examples, such as Figure 3 and Figure 4 As shown, the distance between the bottom wall 121 of the sealing groove 12 and the top surface 1a of the cover 1 is the same. That is, the top surface 1a is parallel to the bottom wall 121 of the sealing groove 12. The top surface 1a is adjacent to the side wall of the sealing groove 12, so the height of the side wall of the sealing groove 12 is equal everywhere. In this way, after the cover 1 is connected to the thermostat seat, the compression of the sealing ring can be kept as uniform as possible, so that the sealing ring can perform a good sealing function.

[0077] In some examples, such as Figure 5 and Figure 6As shown, the cover 1 has a reinforcing rib 13 on the side opposite to the top surface 1a. The length H of the protruding reinforcing rib 13 gradually increases along the direction close to the first reference line A. The reinforcing rib 13 can also be viewed as arched, protruding towards the tube body 102. The cover 1 has two reinforcing ribs 13, which are symmetrical about the line B connecting the two pre-embedded holes 11. The reinforcing rib 13 further strengthens the connection surface between the cover 1 and the thermostat seat, thereby strengthening the connection strength between the cover 1 and the thermostat seat. The cover 1 and the thermostat seat are connected by bolts passing through the pre-embedded holes 11. Therefore, after the cover 1 is connected to the thermostat seat, the portion of the cover 1 near the pre-embedded hole 11 is less prone to deformation because it is already tightened by the bolts. However, the portion of the cover 1 away from the pre-embedded hole 11 only fits against the thermostat seat without any connecting parts, making it more susceptible to deformation. The protruding length H of the reinforcing rib 13 gradually increases along the direction close to the first reference line A, that is, the protruding length H of the reinforcing rib 13 gradually increases along the direction away from the pre-embedded hole 11. This prevents deformation of the portion of the cover 1 away from the pre-embedded hole 11. Furthermore, due to the injection molding process, the strength of the middle portion of the cover 1 is lower during injection molding. Therefore, the protruding length H of the reinforcing rib 13 gradually increases along the direction close to the first reference line A, which helps prevent deformation of the cover 1 during the injection molding process.

[0078] In some examples, stiffener 13 is symmetrical about the first baseline A.

[0079] In other examples, the bottom wall of the reinforcing rib 13 may also be a plane, and this disclosure does not specifically limit this.

[0080] The cover 1 and the nest 2 are integrally injection molded. During the manufacturing process of the thermostat cover, the nest 2 is placed in the corresponding position of the pre-embedded hole 11 in advance, and then injection molding is performed so that the nest 2 is embedded in the cover 1. The nest 2 is described below as an example.

[0081] In some examples, such as Figure 7 As shown, the nest 2 includes a middle portion 21 and two ends 22. The diameter of the middle portion 21 is smaller than the diameter of the two ends 22, and the middle portion 21 is located between the two ends 22. The nest 2 can also be viewed as having a waist shape. The outer wall of the middle portion 21 of the nest 2 is filled with plastic, allowing the nest 2 and the cover 1 to alternately fill each other, thereby achieving axial positioning of the nest 2 in the pre-embedded hole 11 and preventing the nest 2 from falling out of the pre-embedded hole 11. Furthermore, this further strengthens the connection between the nest 2 and the cover 1, thereby strengthening the connection between the cover 1 and the thermostat seat.

[0082] Correspondingly, the shape of the pre-embedded hole 11 is the same as the shape of the outer wall of the nest 2, that is, the inner diameter of the middle position of the inner wall of the pre-embedded hole 11 is smaller, and the inner diameter of both ends is larger.

[0083] In some examples, such as Figure 7 As shown, at least one end 22 has a plurality of grooves 220 on its outer wall, which are evenly distributed circumferentially along the end 22. During injection molding of the cover 1, plastic is filled into the grooves 220, allowing the nest 2 and the cover 1 to alternately fill each other, thereby achieving circumferential positioning of the nest 2 in the pre-embedded hole 11. This further strengthens the connection between the nest 2 and the cover 1, thereby strengthening the connection between the cover 1 and the thermostat seat.

[0084] In some examples, such as Figure 7 As shown, the groove 220 is a V-shaped groove, and multiple V-shaped grooves are evenly distributed along the axial direction of the end 22.

[0085] In other examples, the groove 220 may also be U-shaped or square, etc., and the embodiments disclosed herein do not specifically limit this.

[0086] In some examples, such as Figure 7 As shown, the outer walls of both ends 22 have grooves 220. The shape, number, and arrangement of the grooves 220 on the two ends 22 can be the same or different, and this embodiment does not specifically limit this.

[0087] In some examples, such as Figure 7 As shown, the sidewall of the nest 2 has an opening 23, which extends through the nest 2 axially. The nest 2 can be considered as a non-circular cylinder, that is, the cross-sectional shape of the nest 2 perpendicular to the axis of the pre-embedded hole is not a complete circle.

[0088] For example, the opening 23 faces the inside of the cover 1.

[0089] Correspondingly, such as Figure 5 As shown, the embedded hole 11 is shaped like two joined arcs with different diameters. One arc has the same diameter as the outer wall of the nest 2, and the other arc has the same diameter as the inner wall of the nest 2. Ultimately, the arc with the smaller diameter of the embedded hole 11 forms a circular through hole with the inner wall of the nest 2, for the bolt to pass through.

[0090] This ensures that the distance between the two nests 2 is not too far, and that the wall thickness of the cover 1 around the pre-embedded hole 11 is within a safe range. If the nest 2 is a complete cylinder, the distance between the nest 2 and the cavity 10 will be too close, resulting in a thinner wall thickness between the pre-embedded hole 11 and the cavity 10, which in turn reduces the strength of the pre-embedded hole 11. This, in turn, leads to a weaker connection strength between the cover 1 and the thermostat seat.

[0091] In some examples, the cross-sectional shape of the nest 2 is a 2 / 3 circular arc, meaning the central angle corresponding to the cross-sectional shape of the nest 2 is 240°. Similarly, the circular angle corresponding to the cross-sectional shape of the opening 23 is 120°. If the opening 23 is too small, the wall thickness between the embedded hole 11 and the cavity 10 will be too thin. If the opening 23 is too large, the strength of the nest 2 will be lower.

[0092] Of course, in other examples, the central angle corresponding to the cross-sectional shape of nested 2 can also be other angles, and this disclosure does not specifically limit this.

[0093] The thermostat cover provided in this embodiment, while meeting requirements for space, force, and temperature, solves installation deformation and poor sealing problems through a special pre-deformation structure designed in the cover body 1. It also integrates a special nesting structure 2 to address installation space and torque requirements. The thermostat cover provided in this embodiment has a compact structure, is easy to install and arrange, is small in size and light in weight, and has a significant cost advantage. Furthermore, the pre-deformation structure solves problems such as gaps between the thermostat cover and the thermostat seat, insufficient compression of the sealing ring, and coolant leakage caused by deformation under stress during thermostat production and assembly, thus making the thermostat's seal more reliable.

[0094] This disclosure also provides a thermostat assembly, which includes a thermostat base, a thermostat body, and the aforementioned thermostat cover. The thermostat cover is connected to the thermostat base, and a receiving cavity is formed between the thermostat cover and the thermostat base, with the thermostat body located within the receiving cavity.

[0095] The technical solution provided in this disclosure compensates for the inconsistent compression of the sealing ring caused by inconsistent deformation of the sealing groove 12 in the thermostat assembly, as the bottom wall of the sealing groove 12 gradually decreases along the direction away from the first reference line A. This results in a more uniform compression of the sealing ring at various points, thus ensuring the sealing effect of the sealing ring. This prevents coolant leakage from the connection between the thermostat cover and the thermostat seat, ensuring the normal operation of the vehicle's cooling system.

[0096] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A thermostat cover, characterized in that, The thermostat cover includes a cover body (1) and two nests (2). The cover body (1) has a cavity (10), two pre-embedded holes (11) and a sealing groove (12). The cavity (10) is used to connect with the coolant inlet pipe; The two pre-embedded holes (11) are arranged on both sides of the cavity (10), and the two nests (2) are fixed to the two pre-embedded holes (11) respectively. The cover (1) is used to connect to the thermostat seat through the nests (2). The sealing groove (12) is located on the top surface (1a) of the cover (1), the sealing groove (12) surrounds the cavity (10) and is located between the two pre-embedded holes (11), wherein the top surface (1a) is the side of the cover (1) used to connect with the thermostat seat; Along a direction away from the first reference line (A), the top surface (1a) of the cover (1) gradually decreases, the bottom wall (121) of the sealing groove (12) gradually decreases, and the distance between the bottom wall (121) of the sealing groove (12) and the top surface (1a) of the cover (1) is consistent. The first reference line (A) is perpendicular to the line (B) connecting the two pre-embedded holes (11) and perpendicular to the axis (O) of the sealing groove (12).

2. The thermostat cover according to claim 1, characterized in that, The height difference D between the highest and lowest points of the bottom wall of the sealing groove (12) is 0.25mm-0.35mm.

3. The thermostat cover according to claim 1, characterized in that, The cover (1) has a reinforcing rib (13) on the side opposite to the top surface (1a); Along the direction close to the first baseline (A), the protrusion length H of the reinforcing rib (13) gradually increases.

4. The thermostat cover according to claim 1, characterized in that, The nesting (2) includes a middle part (21) and two ends (22); The diameter of the middle part (21) is smaller than the diameter of the two ends (22), and the middle part (21) is located between the two ends (22).

5. The thermostat cover according to claim 4, characterized in that, At least one of the ends (22) has a plurality of grooves (220) on its outer wall, the plurality of grooves (220) being evenly distributed along the circumference of the end (22).

6. The thermostat cover according to claim 5, characterized in that, The groove (220) is a V-shaped groove.

7. The thermostat cover according to claim 4, characterized in that, The sidewall of the nest (2) has an opening (23) that extends axially through the nest (2).

8. A thermostat assembly, characterized in that, The thermostat assembly includes a thermostat base, a thermostat body, and a thermostat cover as described in any one of claims 1-7; The thermostat cover is connected to the thermostat base, and there is a receiving cavity between the thermostat cover and the thermostat base, with the thermostat body located in the receiving cavity.

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