A novel thermostat initial full-opening fixture

Abstract

This utility model discloses a novel initial and full opening fixture for measuring thermostats, including a flange frame, a threaded copper cap, a threaded copper sleeve, a pin, a base, a spring, and a bracket. The flange frame is fixedly connected to the threaded copper cap, and the threaded copper sleeve is used to hold paraffin wax. The threaded copper sleeve and the threaded copper cap are detachably connected by threads. The threaded copper sleeve and the threaded copper cap are combined to form a wax pack. The pin is inserted into the wax pack, and the other end of the pin passes through a hole in the base. The bracket is assembled with the base by a snap-fit ​​mechanism, and a spring is provided between the bracket and the flange frame. This utility model uses the snap-fit ​​mechanism of the base and the slot of the bracket for assembly, combined with the threaded connection of the threaded copper sleeve and the threaded copper cap, to quickly complete the assembly and disassembly of the fixture without tools. This avoids the cumbersome disassembly and assembly steps of traditional bolt-connected fixtures, making the testing, paraffin wax adjustment, and retesting process more efficient and adaptable to the high-frequency parameter verification needs in the R&D stage.

Description

Technical Field

[0001] This utility model mainly relates to the field of thermostat technology, specifically a novel tooling for measuring the initial and full opening of a thermostat. Background Technology

[0002] As a core control component of the internal combustion engine cooling system, the thermostat's performance directly determines the stability of the engine coolant circulation temperature. The core functional unit of the thermostat is the paraffin wax assembly, which works by utilizing the physical properties of paraffin wax—expansion when heated and contraction when cooled. When the coolant temperature reaches a set threshold, the paraffin wax inside the wax assembly melts and expands, pushing a push rod to open the thermostat's main valve, enabling a large circulation. When the temperature drops, the paraffin wax solidifies and contracts, and the valve closes under the action of a return spring, switching to a small circulation.

[0003] During the development or performance optimization of new thermostat products, R&D personnel need to repeatedly test and verify to determine the paraffin parameters (type and content) suitable for specific engine operating conditions. However, the current industry testing of thermostat wax pack performance generally relies on finished parts or disposable rapid prototypes. Specifically, it is necessary to first manufacture the wax pack shell according to the preliminary design plan, encapsulate the specific type and content of paraffin wax into the shell to form a complete wax pack, and then assemble it into a thermostat prototype before placing it on a high and low temperature test bench to test its initial opening and full opening temperatures and response speed.

[0004] The aforementioned existing technologies have limitations: on the one hand, the paraffin parameters cannot be flexibly adjusted. Since the wax shell is a non-removable structure, once the paraffin is encapsulated, its type and content are fixed. If the test results show that the parameters do not match, a new wax shell needs to be made and encapsulated with paraffin, and then assembled into a thermostat prototype for secondary testing. On the other hand, the testing efficiency is low and resources are wasted. The production of finished parts or rapid prototypes requires molds, raw materials and processing time. Especially in the early stages of research and development, when multiple paraffin ratios need to be verified, this not only leads to a significant extension of the testing cycle, but also generates a large number of discarded prototypes, increasing research and development costs.

[0005] In addition, existing thermostat testing fixtures are mostly designed for finished parts. When it is necessary to change the type of paraffin or adjust the content, the entire testing fixture must be disassembled and refitted to a new sample, which further exacerbates the cumbersome nature of R&D testing and makes it difficult to meet the current needs of engine R&D for rapid iteration of thermostats. Utility Model Content

[0006] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. It mainly provides a novel tooling for measuring the initial and full opening of a thermostat, which solves the technical problems mentioned in the background.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A novel initial and full opening fixture for measuring thermostats includes a flange frame, a threaded copper cap, a threaded copper sleeve, a pin, a base, a spring, and a bracket. The flange frame is fixedly connected to the threaded copper cap. The threaded copper sleeve is used to hold paraffin wax, and the threaded copper sleeve and the threaded copper cap are detachably connected by threads. The threaded copper sleeve and the threaded copper cap are combined to form a wax pack. The pin is inserted into the wax pack, and the other end of the pin passes through a hole in the base. The bracket is assembled with the base by a snap-fit ​​method, and a spring is provided between the bracket and the flange frame.

[0008] Preferably, the flange skeleton and the threaded copper cap are fixedly connected by a press-fitting process.

[0009] Preferably, the flange skeleton has a through groove at its center for the PIN needle to pass through.

[0010] Preferably, the base includes a base body, and two sets of through flange skeletons are installed on one side of the base body for engaging with the bracket.

[0011] Preferably, the bracket has a slot for cooperating with the locking rod, and a moving through slot for the threaded copper sleeve to move is provided at the center of the bracket.

[0012] Preferably, the flange frame is pressed against one side of the base by a spring.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The base's locking rod engages with the bracket's locking slot, and the threaded connection of the threaded copper sleeve and threaded copper cap allows for quick assembly and disassembly of the tooling without tools. This avoids the cumbersome assembly and disassembly steps of traditional bolt-connected tooling, making the testing, paraffin adjustment, and retesting process more efficient and adaptable to the high-frequency parameter verification needs of the R&D stage. By riveting the flange skeleton to the threaded copper cap, and connecting the threaded copper sleeve and the threaded copper cap in a detachable manner, a wax packaging ligand for paraffin wax can be flexibly adjusted. The type of paraffin wax or the content can be changed or adjusted without the need to make finished samples. This avoids the need for duplicate parts due to the non-detachable wax package in traditional testing, reduces mold and raw material consumption, shortens the testing cycle, and lowers R&D costs. The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram showing the positional relationship between the flange frame and the threaded copper cap of this utility model; Figure 3 This is a schematic diagram of the threaded copper sleeve structure of this utility model; Figure 4 This is a schematic diagram showing the positional relationship between the threaded copper sleeve and the PIN pin of this utility model; Figure 5 This is a schematic diagram of the base structure of this utility model; Figure 6 This is a schematic diagram of the support structure of this utility model.

[0015] Numbering on the map: 1. Flange frame; 2. Threaded copper cap; 3. Threaded copper sleeve; 4. Pin; 5. Base; 51. Base body; 52. Locking rod; 6. Spring; 7. Bracket. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] Please refer to the appendix carefully. Figure 1-6 A new type of initial and full opening fixture for measuring thermostats is provided. The flange frame 1 and the threaded copper cap 2 are fixedly connected by a riveting process. The riveting process forms a metal plastic engagement, eliminating thread gaps or welding stress issues, and ensuring that the flange frame 1 and the threaded copper cap 2 remain fixed throughout the test.

[0020] The threaded copper sleeve 3 is used to contain paraffin wax. The threaded copper sleeve 3 is a cylindrical copper component with one open end and one closed end. The outer wall of the open end is machined with fine external threads. The threaded copper sleeve 3 can be made of high-purity copper, which has good thermal conductivity and can quickly transfer the ambient temperature of the high and low temperature test bench to the internal paraffin wax. The threaded copper sleeve 3 and the threaded copper cap 2 are detachably connected by threads. The threaded copper sleeve 3 and the threaded copper cap 2 are combined to form a wax bag. After the test, you only need to unscrew the threaded copper sleeve 3 and the threaded copper cap 2 in the opposite direction to directly remove the paraffin wax in the threaded copper sleeve 3 and replace it with paraffin wax with a different melting point or adjust the filling ratio. An annular sealing groove is opened on the inner wall of the threaded copper cap 2, and a sealing ring is embedded in the groove. When the threaded copper sleeve 3 and the threaded copper cap 2 are fully screwed together, the open end face of the threaded copper sleeve 3 is tightly fitted with the sealing ring to achieve paraffin wax sealing and prevent high temperature leakage.

[0021] The PIN pin 4 is inserted into the wax bag to form a wax package assemblies. The PIN pin 4 has a stepped cylindrical structure, and one end of the PIN pin 4 is in contact with the paraffin wax in the wax bag. A through groove for the PIN pin 4 to pass through is opened at the center of the flange frame 1, and the other end of the PIN pin 4 passes through the hole in the base 5.

[0022] The bracket 7 and the base 5 are assembled by a snap-fit ​​method. The base 5 includes a base body 51, and two sets of through flange skeletons 1 are installed on one side of the base body 51 for snap-fitting with the bracket 7. The bracket 7 has a slot for engaging with the slot 52, and a moving through slot for moving the threaded copper sleeve 3 is provided at the center of the bracket 7.

[0023] A spring 6 is installed between the bracket 7 and the flange skeleton 1. The flange skeleton 1 is pressed against one side of the base 5 by the spring 6. One end of the spring 6 abuts against the spring positioning groove opened in the bracket 7, and the other end of the spring 6 abuts against the spring positioning block opened on the side of the flange skeleton 1 facing the bracket 7. The spring 6 is a cylindrical helical compression spring with a stiffness coefficient of 8-12N / mm. Its elastic force range needs to be adapted to the 50-100N thrust generated by the thermal expansion of paraffin in the wax bag, so as to ensure that the paraffin can push the flange skeleton 1 to move and compress the spring 6 when the temperature drops. When the temperature drops, the spring 6 can drive the component to return to its original position.

[0024] The specific operating procedure of this utility is as follows: The flange skeleton 1 and the threaded copper cap 2 are fixedly connected and combined into a whole by using the press riveting process.

[0025] After connection, paraffin wax is placed into the threaded copper sleeve 3 according to a certain ratio. The threaded copper sleeve 3 and the threaded copper cap 2 are tightened by threads. Then, the PIN needle 4 is inserted through the through groove opened in the center of the flange skeleton 1, passing through the flange skeleton 1 and the threaded copper cap 2 in sequence, and finally inserted into the threaded copper sleeve 3. Ensure that one end of the PIN needle 4 is in close contact with the paraffin wax in the threaded copper sleeve 3, and the other end protrudes and can be used to insert the hole of the base 5 later. During the insertion process, it is necessary to ensure that the PIN needle 4 is not crooked and can move smoothly. After the PIN needle 4 is inserted, it forms a wax package ligand. Then, the head of the PIN needle 4 is aligned with the hole of the base 5 and inserted. Then, according to the thermostat structure, the spring 6 and the bracket 7 are pressed in. The whole set of fixtures is placed in the high and low temperature test bench. After the test is completed, the fixtures are disassembled, the threaded copper sleeve 3 is unscrewed, the paraffin wax content and type are adjusted, and the test is carried out again according to the above steps. This achieves the purpose of quick disassembly and convenient adjustment of paraffin wax.

[0026] When the ambient temperature of the high and low temperature test bench is raised to the melting point of the paraffin inside the wax package, the paraffin changes from solid to liquid and expands significantly in volume, generating an outward pushing force. The expansion force cannot be released outward and will concentrate on the PIN needle 4 inserted into the wax package ligand, directly driving the PIN needle 4 to move linearly along its axis. The PIN needle extends and drives the wax package ligand and the flange skeleton 1 to move, thereby compressing the spring 6.

[0027] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A new type of measuring the thermostat initial full opening tool, characterized in that: Includes flange frame (1), threaded copper cap (2), threaded copper sleeve (3), PIN pin (4), base (5), spring (6) and bracket (7); The flange skeleton (1) is fixedly connected to the threaded copper cap (2), the threaded copper sleeve (3) is used to hold the paraffin wax, and the threaded copper sleeve (3) and the threaded copper cap (2) are detachably connected by threads. The threaded copper sleeve (3) and the threaded copper cap (2) are combined to form a wax bag. The pin (4) is inserted into the wax bag, and the other end of the pin (4) is inserted into the hole of the base (5). The bracket (7) is assembled with the base (5) by a snap-fit ​​method, and a spring (6) is provided between the bracket (7) and the flange skeleton (1).

2. A novel measuring the temperature of the thermostat initial full open tool according to claim 1, characterized in that: The flange frame (1) and the threaded copper cap (2) are fixedly connected by a riveting process.

3. A novel measuring the temperature of the thermostat initial full open tool according to claim 1, characterized in that: The flange frame (1) has a through groove at its center for the PIN pin (4) to pass through.

4. The novel measuring the temperature of the thermostat initial full opening tool according to claim 1, characterized in that: The base (5) includes a base body (51), and two sets of through flange skeletons (1) are installed on one side of the base body (51) for engaging with the bracket (7) with clamps (52).

5. The novel measuring the temperature of the thermostat initial full opening tool according to claim 1, characterized in that: The bracket (7) has a slot for use with the locking rod (52), and a moving through slot for the threaded copper sleeve (3) to move is provided at the center of the bracket (7).

6. A new type of measuring the temperature of the thermostat initial full open tool according to claim 1, characterized in that: The flange frame (1) is pressed against one side of the base (5) by a spring (6).

Images