Expansion tank for automobile
By installing an inner pipe in the car's expansion tank to inject lubricating oil, the problem of bolt corrosion was solved, achieving rust prevention of the threads and ease of removal, thus improving maintenance efficiency.
Patent Information
- Application Number
- CN202520112239.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2035-01-17
AI Technical Summary
When used in humid environments, the bolts of existing automotive expansion tanks are prone to corrosion, making disassembly difficult and affecting work efficiency.
An inner tube is installed in the expansion tank, and lubricating oil is injected into the inner tube. The lubricating oil is immersed in the locking bolts and threaded grooves. The amount of lubricating oil is controlled through the inlet pipe and plastic port. Combined with rubber gaskets, leakage is reduced and corrosion is prevented.
It effectively prevents thread corrosion, simplifies the disassembly process, avoids engine room contamination, and improves maintenance efficiency.
Smart Images

Figure CN223536437U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of automotive components and devices, and in particular to automotive expansion tanks. Background Technology
[0002] The main function of an automotive expansion tank is to provide adequate expansion space for the coolant in the cooling system, so as to make more effective use of the radiator's heat dissipation function and improve the cooling efficiency of the entire vehicle's cooling system.
[0003] Existing water tanks are typically installed using bolts. However, cars inevitably come into contact with humid environments during use, such as near water or in rainy or snowy weather. In these situations, moisture from the environment can enter the car's engine compartment and come into contact with the bolts. As a result, the bolts become rusted and difficult to remove during subsequent maintenance and disassembly, affecting work efficiency and presenting certain shortcomings.
[0004] Therefore, an expansion tank for automobiles has been provided to solve the problems mentioned above. Utility Model Content
[0005] The purpose of this utility model is to solve the problems mentioned in the background art and to propose an expansion tank for automobiles.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] Automotive expansion tanks include the tank body, mounting bracket, and also:
[0008] The connecting bracket is fixedly connected to the water tank body;
[0009] A threaded groove is provided on the mounting bracket;
[0010] An inner tube is disposed within the mounting bracket, the inner tube is connected to a threaded groove, and both ends of the inner tube are located directly above the mounting bracket;
[0011] A locking bolt, threaded onto the threaded groove, is used to connect the mounting bracket and the connecting bracket;
[0012] By injecting lubricating oil into the inner tube, the lubricating oil can be immersed in the locking bolt and the thread groove.
[0013] To replenish the lubricant, preferably, an inlet pipe is fixedly connected to one end of the inner tube.
[0014] To drain excess lubricant, preferably, a plastic port is fixedly connected to the other end of the inner tube.
[0015] To facilitate gas discharge and to indicate whether there is sufficient lubricating oil, the plastic opening is preferably provided with an exhaust port and graduation lines.
[0016] For ease of installation, preferably, the connecting frame is provided with an opening, and the plastic opening is located inside the opening.
[0017] To reduce vibration and achieve a certain sealing effect, thereby reducing lubricant leakage, preferably, a rubber pad is connected to the connecting frame.
[0018] Compared with the prior art, this utility model provides an expansion tank for automobiles, which has the following characteristics:
[0019] Beneficial effects:
[0020] This invention, through the design of the inner tube, allows the threads to be immersed in lubricating oil, effectively preventing corrosion of the threads when moisture enters, facilitating subsequent disassembly. Furthermore, the design of the liquid inlet pipe and plastic opening allows for clear indication of the amount of lubricating oil added, preventing excessive addition and resulting engine compartment contamination. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of the automotive expansion tank proposed in this utility model;
[0022] Figure 2 This is a cross-sectional view of the automotive expansion tank connecting bracket and mounting bracket proposed in this utility model.
[0023] Figure 3 This is a schematic diagram of the connecting frame and mounting frame in the automotive expansion tank proposed in this utility model.
[0024] In the diagram: 1. Water tank body; 101. Connecting frame; 102. Opening; 2. Mounting frame; 201. Inner tube; 202. Liquid inlet pipe; 203. Plastic opening; 3. Locking bolt; 4. Rubber pad. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0026] Example 1:
[0027] Reference Figure 1-3An automotive expansion tank includes a tank body 1, a mounting bracket 2, and further includes: a connecting bracket 101 fixedly connected to the tank body 1; a threaded groove on the mounting bracket 2; an inner tube 201 disposed inside the mounting bracket 2, the inner tube 201 communicating with the threaded groove, and both ends of the inner tube 201 being located directly above the mounting bracket 2; a locking bolt 3 threadedly connected to the threaded groove, the locking bolt 3 being used to connect the mounting bracket 2 and the connecting bracket 101; by injecting lubricating oil into the inner tube 201, the lubricating oil can be immersed in the locking bolt 3 and the threaded groove, and a rubber pad 4 is connected to the connecting bracket 101.
[0028] In use, this device is installed in the engine compartment of the vehicle by mounting bracket 2, then the connecting bracket 101 on the water tank body 1 is aligned with mounting bracket 2, and then the locking bolt 3 is inserted to connect the connecting bracket 101 and mounting bracket 2. Figure 3 As shown, the threaded area on the locking bolt 3 is located in the lower middle part. During installation, the unthreaded area will contact the connecting bracket 101.
[0029] After installation, a certain amount of lubricating oil can be drawn through the syringe and then aligned with the inner tube 201. The lubricating oil is then injected into the inner tube 201. As the lubricating oil enters, it will gradually fill the inner tube 201 and then penetrate the threaded connection, providing lubrication and preventing rust. When the car is in use, the lubricating oil will flow naturally when the vehicle is bumpy, thus filling all the threads.
[0030] Example 2:
[0031] Reference Figure 1-3 The expansion tank for automobiles is basically the same as in Example 1, but with the following additional features: an inlet pipe 202 is fixedly connected to one end of the inner tube 201, and a plastic port 203 is fixedly connected to the other end of the inner tube 201. The plastic port 203 is provided with an exhaust port and a scale line, and an opening 102 is provided on the connecting bracket 101. The plastic port 203 is located inside the opening 102.
[0032] When refueling, refuel through the inlet pipe 202. When excess oil is discharged through the plastic port 203, it indicates that there is enough oil.
[0033] The scale marks make it easy to know exactly how much oil has been added, preventing overfilling and spillage due to bumps in the vehicle.
[0034] Plastic nozzle 203 should be made of transparent material.
[0035] This invention, through the inner tube 201, allows the threads to be immersed in lubricating oil, effectively preventing corrosion of the threads when moisture enters, facilitating subsequent disassembly. Furthermore, the liquid inlet pipe 202 and the plastic port 203 clearly indicate the amount of lubricating oil added, preventing excessive addition that could lead to engine compartment contamination.
[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. An expansion tank for automobiles, comprising a tank body (1) and a mounting bracket (2), characterized in that, Also includes: A connecting bracket (101) is fixedly connected to the water tank body (1); A threaded groove is provided on the mounting bracket (2); An inner tube (201) is disposed inside the mounting bracket (2). The inner tube (201) is connected to the threaded groove, and both ends of the inner tube (201) are located directly above the mounting bracket (2). Locking bolt (3) is threaded onto the threaded groove and is used to connect mounting bracket (2) and connecting bracket (101); By injecting lubricating oil into the inner tube (201), the lubricating oil can be immersed in the locking bolt (3) and the thread groove.
2. The automotive expansion tank according to claim 1, characterized in that, An inlet pipe (202) is fixedly connected to one end of the inner tube (201).
3. The automotive expansion tank according to claim 2, characterized in that, A plastic port (203) is fixedly connected to the other end of the inner tube (201).
4. The automotive expansion tank according to claim 3, characterized in that, The plastic opening (203) is provided with an exhaust port and a scale line.
5. The automotive expansion tank according to claim 3, characterized in that, The connecting frame (101) is provided with an opening (102), and the plastic opening (203) is located inside the opening (102).
6. The automotive expansion tank according to claim 1, characterized in that, A rubber pad (4) is connected to the connecting frame (101).