Sealed thermostat
By connecting the outer shell and base of the sealed thermostat using vibration friction welding technology, the problem of wax leakage caused by screw connections under high temperature and high pressure is solved, achieving efficient sealing and low-cost production.
Patent Information
- Application Number
- CN202520552734.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-27
AI Technical Summary
In existing sealed thermostats, the base and the outer shell are connected by screws, which can easily lead to wax leakage and temperature imbalance during initial and full opening under high temperature, high pressure and high vibration environments. In addition, using more heat- and pressure-resistant materials increases costs.
Vibration friction welding technology is used to connect the outer shell and the base. By setting annular welding ribs and annular grooves, a high-strength weld is formed, avoiding screw connections and reducing material costs.
It improves the sealing effect, avoids problems such as loose screws and poor sealing, reduces material costs, is suitable for high-quality, mass production, and is superior to traditional screw connections in terms of processing efficiency and environmental protection.
Smart Images
Figure CN223754161U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model mainly relates to the technical field of sealed thermostat, specifically a sealed thermostat. BACKGROUND
[0002] The sealed thermostat is a type of thermostat, which automatically opens or closes the passage of cooling liquid to the radiator according to the temperature of the engine cooling liquid, so as to keep the engine within the optimal working temperature range. It is usually installed in the water outlet pipeline of the engine cylinder head or the water outlet pipeline of the radiator. Its main components include a temperature sensing assembly, a valve, a valve stem, a spring, a housing, and a base. The housing and the base are used to accommodate and protect the internal temperature sensing assembly, valve, spring, and other components. They are also the part of the thermostat connected to the engine cooling system pipeline. They are usually made of metal or high-strength plastic, have good sealing performance and certain strength, and can withstand the pressure and temperature in the cooling system.
[0003] In the existing sealed thermostat, the base and the housing are generally connected by screws. Since the melting point of the internal wax is relatively low, when the temperature is higher than the melting point of the wax, the wax will gradually melt and increase in flowability. The traditional wax package sealing structure is prone to wax leakage and initial full opening temperature adjustment problems in high temperature, high pressure, and high vibration environments. To solve these problems, the traditional solution is to use more temperature and pressure resistant materials to manufacture the thermostat housing and internal components. However, this increases the cost. UTILITY MODEL CONTENTS
[0004] The utility model technical scheme provides a significantly different solution from the existing technology to solve the technical problem of the over-simplified solution of the existing technology. Specifically, the utility model mainly provides a sealed thermostat to solve the technical problem of the existing sealed thermostat, in which the base and the housing are generally connected by screws. To avoid wax leakage, more temperature and pressure resistant materials are needed to manufacture the thermostat housing, resulting in higher cost.
[0005] The utility model solves the above technical problem by using the following technical scheme:
[0006] A sealed thermostat includes an external structure, which includes a housing and a base. The housing bottom and the base interface position are connected by vibration friction welding, and the weld seam is controlled within 0.2±0.1mm.
[0007] Further, the housing bottom is provided with a welding rib position, and the welding rib position is provided with an annular welding rib.
[0008] Further, the thickness of the annular welding rib is 3±0.1mm, the height is 4.2±0.1mm, the friction surface flatness is within 0.1mm, and the roundness requirement is within 0.15mm.
[0009] Further, the base interface position is provided with an annular groove matched with the annular welding rib, the width of the annular groove is 5.316±0.1mm, and the groove depth is 2.5±0.1mm.
[0010] Further, the coaxiality of the annular groove and the annular welding rib is within 0.2mm.
[0011] Compared with the prior art, the utility model has the advantages that:
[0012] The utility model discloses a shell, welding rib position and base are set up, realize the vibration friction welding between annular welding rib and annular groove, combine under solid state, form the high strength welding seam, improve the sealing effect, avoid the traditional screw structure, reduce the screw loosening or the aging of sealing washer etc.
[0013] The utility model will be explained in detail in the following with specific embodiment and accompanying drawing. DRAWINGS
[0014] Figure 1 It is the whole structure schematic diagram of the utility model;
[0015] Figure 2 It is the shell structure schematic diagram of the utility model;
[0016] Figure 3 It is the base structure schematic diagram of the utility model;
[0017] Figure 4 It is the shell fixed tooling schematic diagram of the utility model;
[0018] Figure 5 It is the welding direction schematic diagram of the utility model.
[0019] In the drawing: 1, external structure;11, shell;111, welding rib position;112, annular welding rib;12, base;121, annular groove. PREFERRED EMBODIMENT
[0020] For the convenience of understanding the utility model, the utility model will be described more comprehensively below with reference to relevant drawings, and several embodiments of the utility model are given in the drawings, but the utility model can be realized in different forms and is not limited to the embodiments described in the text, on the contrary, these embodiments are provided to make the disclosed content of the utility model more thorough and comprehensive.
[0021] 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 can be a middle element, and when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be a middle element, and the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs, and the terms used in the specification of the utility model herein are for the purpose of describing specific embodiments and are not intended to limit the utility model, and the term "and / or" used herein includes any and all combinations of one or more related listed items.
[0023] Please refer to the drawings Figures 1-5 A sealed thermostat comprises an external structure 1, the external structure 1 comprises a shell 11 and a base 12, the shell 11 bottom and the base 12 interface position are connected through vibration friction welding, and the welding seam is controlled within 0.2±0.1mm.
[0024] Through the above structure, the vibration friction welding between the shell 11 bottom and the base 12 groove position is realized, the sealing effect is improved, the traditional screw structure is avoided, the screw loosening or sealing washer aging caused by screw connection and other reasons are reduced, the situation of sealing is not strict, no screw and other connecting parts are needed, the material cost is reduced, and the processing efficiency, overall appearance, automation and environmental protection are superior to the traditional screwing mode, there is no screw head or screw hole and other protrusions, it is suitable for high-quality mass production, high-temperature and high-pressure materials are not needed to manufacture the shell 11, the cost is further reduced, and it has certain practical value.
[0025] The specific operation is as follows, first, the shell 11 is fixed by using a production line tool, so that it cannot move up and down and left and right, as shown in Figure 4, the vibration friction welding equipment of the profiling structure fastens the base 12, and ensures that the base 12 can be dragged to move left and right, then the annular welding rib 112 is aligned to the annular groove 121 of the base 12, the coaxial degree of the annular welding rib 112 and the annular groove 121 is ensured to be within 0.2mm, then the vibration friction welding equipment is started, the base 12 moves left and right, the moving direction is as shown in the figure, and the annular welding rib 112 is fused to the base 12. Figure 5 , the annular welding rib 112 and the annular groove 121 continuously generate heat and melt by friction, and finally melt into a whole.
[0026] Please refer to the accompanying drawings Figure 2 and the accompanying drawings Figure 3 , the bottom of the shell 11 is provided with a welding rib position 111, the welding rib position 111 is provided with an annular welding rib 112, the thickness of the annular welding rib 112 is 3±0.1mm, the height is 4.2±0.1mm, the flatness of the friction surface is within 0.1mm, the roundness requirement is within 0.15mm, through setting the parameters of the annular welding rib 112, the annular welding rib 112 can be matched with the annular groove 121, which is beneficial to the vibration friction welding later, the interface position of the base 12 is provided with an annular groove 121, the annular groove 121 is matched with the annular welding rib 112, the width of the annular groove 121 is 5.316±0.1mm, the groove depth is 2.5±0.1mm, the coaxial degree of the annular groove 121 and the annular welding rib 112 is within 0.2mm, which is beneficial to better control of the welding seam, so that the welding seam is within 0.2±0.1mm.
[0027] The utility model has been described exemplarily above in combination with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode, as long as this kind of non-essential improvement using the method concept and technical scheme of the utility model, or directly applying the concept and technical scheme of the utility model to other occasions without improvement, all are within the protection scope of the utility model.
Claims
1. A sealed thermostat comprising an outer structure (1), characterized in that, The outer structure (1) comprises a shell (11) and a base (12), the shell (11) bottom and the base (12) interface position are connected by vibration friction welding, and the welding seam is controlled within 0.2±0.1mm.
2. A sealed thermostat according to claim 1, wherein The shell (11) bottom is provided with a welding rib position (111), and the welding rib position (111) is provided with an annular welding rib (112).
3. A sealed thermostat according to claim 2, wherein The thickness of the annular welding rib (112) is 3±0.1mm, the height is 4.2±0.1mm, the friction surface flatness is within 0.1mm, and the roundness requirement is within 0.15mm.
4. A sealed thermostat according to claim 1 wherein, The base (12) interface position is provided with an annular groove (121), and the annular groove (121) is matched with the annular welding rib (112), the width of the annular groove (121) is 5.316±0.1mm, and the groove depth is 2.5±0.1mm.
5. A sealed thermostat according to claim 4, wherein The coaxiality of the annular groove (121) and the annular welding rib (112) is within 0.2mm.