Oil level gauge assembly structure and reading method thereof

Abstract

The invention discloses an oil level gauge assembly structure and a reading method thereof.The oil level gauge assembly structure comprises a handle part and a scale part, and an inner hole bent shape used for adapting to an oil filling channel is connected between the handle part and the scale part, so that the scale part accurately reaches an oil level measuring position and is prevented from being damaged when the scale part is pulled out of the oil filling channel; the flexible connecting part scrapes the channel wall of the engine oil filling channel to influence the data reading precision of the scale part; the scale part comprises a graduated scale and a capillary oil groove structure arranged in the length direction of the graduated scale, the capillary oil groove structure can stably store engine oil in the length direction of the graduated scale, data reading of the scale part is assisted, and the situation that the data reading precision of the scale part is affected after the scale part and the channel wall of the engine oil filling channel are scratched is avoided. By means of the method for reading the scale value of the oil liquid at the highest point in the capillary oil groove structure, it can be effectively guaranteed that oil level data of engine oil is accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of filling and detecting of hydraulic transmission oil, and particularly to an oil dipstick assembly structure and a reading method thereof. Background Art

[0002] Hydraulic transmission fluid (ATF) is the core medium of an automatic transmission, and has functions of lubrication, heat dissipation, hydraulic transmission and rust prevention. Its filling volume needs to strictly meet the design requirements: insufficient filling will cause component ablation and heat dissipation failure (such as high temperature alarm, limp home failure); excessive filling will cause poor heat dissipation, oil splash and even engine room fire. There are mainly two methods for quantitative filling in the industry: 1. Quantitative equipment filling method: during factory production and maintenance at a 4S store for passenger cars, it is filled according to the designed volume through special equipment, and the principle of "filling as much as drained" is followed during later oil change. 2. Oil dipstick scale calibration method: the oil level of the hydraulic transmission fluid is visualized through an oil filling pipe assembly and an oil dipstick scale, which is applicable to scenarios such as commercial vehicles and air-cooled transmissions that require frequent manual detection. Its principle is: calibrate the oil dipstick scale (such as the upper and lower limit intervals) during the design stage, and observe whether the oil level meets the standard by inserting and removing the oil dipstick during maintenance.

[0003] The quantitative equipment filling method relies on professional equipment, has high costs, and cannot detect the oil level in real time dynamically. Therefore, although the quantitative equipment filling method is mature in the field of passenger cars, commercial vehicles and special models (such as construction machinery and air-cooled transmission vehicles) still need to rely on the oil dipstick for convenient detection due to their harsh use environments and high maintenance frequencies. However, the oil dipstick scale calibration method has significant defects in practical applications: due to space limitations in commercial vehicles and air-cooled vehicles, the oil filling pipe assembly is often designed with a multi-bend structure (such as a U-shaped or L-shaped elbow). When the oil dipstick is inserted and removed, the spiral tip or the dipstick body is easily rubbed against the pipe wall, resulting in the attached oil being scraped off or contaminated, causing the displayed value of the oil dipstick scale to deviate from the true oil level (the error can reach ±15%). The misjudgment of the oil level directly leads to a deviation in the filling volume. For example, in a commercial vehicle case, the oil dipstick showed "normal" due to pipe rubbing, but the actual oil level was lower than the lower limit, and the transmission was ablated due to insufficient lubrication after driving 500 kilometers; in another case, the oil dipstick scale showed "lack of oil" after being scraped, and excessive refilling caused the oil to spray out from the vent hole and catch fire when encountering the exhaust pipe. In addition, commercial vehicle maintenance is mostly carried out at non-professional repair points, and technicians rely on the intuitive judgment of the oil dipstick. However, the existing oil dipstick has weak anti-interference ability and cannot adapt to complex pipe environments, exacerbating the risk of misjudgment.

[0004] The problem of pipe rubbing in the existing oil dipstick scale calibration method has become a pain point in the industry. Therefore, there is an urgent need for an oil level detection structure with anti-interference and high precision to ensure the reliability of the quantitative filling of hydraulic transmission oil and avoid transmission failure and safety accidents caused by misjudgment. Summary of the Invention

[0005] The object of the present invention is to solve the deficiencies of the above-mentioned background art and provide an oil dipstick assembly structure with strong anti-interference ability and high precision and its reading method.

[0006] To achieve this object, the oil dipstick assembly structure designed by the present invention includes a handle part and a scale part. A flexible connecting part is connected between the handle part and the scale part, which is used to adapt to the inner hole bending shape of the oil filling channel, enable the scale part to accurately reach the oil level measurement position, and avoid scratching the channel wall of the oil filling channel when the scale part is withdrawn from the oil filling channel, which affects the data reading accuracy of the scale part; the scale part includes a scale and a capillary oil groove structure arranged along its length direction. The capillary oil groove structure can stably store oil along the length direction of the scale, assist in reading the data of the scale part, and avoid affecting the data reading accuracy of the scale part after scratching between the scale part and the channel wall of the oil filling channel.

[0007] Further, the flexible connecting part includes a support connecting section that is coaxially and fixedly connected to the handle part as an integral structure and can undergo elastic bending deformation, and an elastic connecting section that is coaxially and fixedly connected to the other end of the support connecting section as an integral structure and can undergo elastic bending, stretching and contraction. The other end of the elastic connecting section is coaxially and fixedly connected to the scale section.

[0008] Further, the support connecting section includes a thin metal rod.

[0009] Further, the elastic connecting section includes a coil spring.

[0010] Further, one or more capillary oil groove structures are arranged on the surface of the scale along its length direction.

[0011] Further, the capillary oil groove structure includes an oil groove seat fixedly connected to the scale and integrated with the scale. A capillary oil groove is formed on the length surface of the side away from the scale, and the capillary oil groove can stably store oil.

[0012] Further, the width and depth of the capillary oil groove are both 1-2 mm.

[0013] Further, the scale section further includes a mesh oil groove arranged on the scale.

[0014] Further, the handle part includes a sealing thread section coaxially and fixedly connected to the flexible connecting part for detachably fixing the oil dipstick assembly structure at the oil filling port, and an oil dipstick handle fixedly connected to one end of the sealing thread section away from the flexible connecting section.

[0015] Furthermore, a method for reading the oil level gauge assembly structure described above includes withdrawing the oil level gauge assembly structure from the oil filling port through the handle portion and reading the scale value of the oil at the highest point in the capillary oil groove structure.

[0016] The beneficial effects of the present invention are as follows: The flexible connection portion can adaptively adjust according to the inner hole bending shape of the oil filling channel, ensuring that the scale portion can accurately reach the oil level measurement position. This characteristic greatly improves the measurement accuracy and avoids measurement errors caused by the inability to accurately reach the measurement position. When the scale portion is withdrawn from the oil filling channel, the flexible connection portion can effectively prevent the scale portion from scratching against the channel wall. Scratching not only may damage the oil level gauge but also affect the data reading accuracy of the scale portion. Through its elastic bending deformation ability, the flexible connection portion enables the scale portion to always maintain a safe distance from the channel wall during the withdrawal process, ensuring the accuracy of data reading. The support connection section uses a thin metal rod to provide a certain rigid support, ensuring that it will not be excessively bent during operation and affecting the overall structural stability, while also having the ability of elastic bending deformation. The elastic connection section uses a coil spring, which can achieve elastic bending, stretching, and contraction, further enhancing the flexibility of the flexible connection portion and enabling it to better cope with oil filling channels of different shapes. The capillary oil groove structure on the scale portion can stably store oil along the length direction of the scale. When the oil level gauge is withdrawn from the oil, even if the oil on the surface of the scale is unevenly distributed due to shaking or other reasons, the oil in the capillary oil groove can still remain relatively stable. This enables the operator to more accurately determine the oil level by reading the scale value of the oil at the highest point in the capillary oil groove, effectively avoiding misjudgment caused by uneven oil distribution. The width and depth of the capillary oil groove are both designed to be 1-2 mm. This size range not only ensures that the oil can be stably stored in the oil groove under capillary action but also will not affect the reading accuracy due to excessive oil storage caused by too large a size, nor will the capillary action be insignificant due to too small a size. The mesh oil groove provided on the scale section further assists in the storage and distribution of oil, works in coordination with the capillary oil groove structure, enhances the adsorption and stabilization of oil, and further improves the accuracy of data reading. The sealed thread section of the handle portion can detachably fix the oil level gauge assembly structure at the oil filling port, which is not only convenient for operation but also has a good sealing effect, preventing oil from overflowing during measurement or impurities from entering the oil filling channel, ensuring the cleanliness and normal operation of the oil system. The design of the oil level gauge handle is convenient for the operator to hold and withdraw the oil level gauge, improving the convenience and efficiency of operation. By using the reading method of reading the scale value of the oil at the highest point in the capillary oil groove structure, it can effectively eliminate the interference of factors such as oil shaking during the withdrawal of the oil level gauge and uneven oil distribution on the surface of the scale to the reading, ensuring that the read oil level data is accurate and reliable. Description of the Drawings

[0017] Figure 1This is the front view of the dipstick assembly structure in the present invention;

[0018] Among them, 1 - handle part (1.1 - sealing thread section, 1.2 - dipstick pull handle), 2 - flexible connection part (2.1 - support connection section, 2.2 - elastic connection section), 3 - scale part (3.1 - scale, 3.2 - capillary oil groove structure, 3.3 - mesh oil groove). Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0020] As Figure 1 shown, in some embodiments, the dipstick assembly structure includes a handle part 1 and a scale part 3. A flexible connection part 2 is connected between the handle part 1 and the scale part 3, which is used to adapt to the bent shape of the inner hole of the oil filling passage, enable the scale part 3 to accurately reach the oil level measurement position of the engine oil, and avoid scratching the channel wall of the oil filling passage by the scale part 3 when the scale part 3 is withdrawn from the oil filling passage, which affects the data reading accuracy of the scale part 3.

[0021] Embodiment 1

[0022] The handle part 1 includes a sealing thread section 1.1 that is coaxially and fixedly connected to the flexible connection part 2 and is used to detachably fix the dipstick assembly structure at the oil filling port, and a dipstick pull handle 1.2 that is fixedly connected to one end of the sealing thread section 1.1 away from the flexible connection section 2.

[0023] Embodiment 2

[0024] The flexible connection part 2 includes a thin metal rod (support connection section 2.1) that is coaxially and fixedly connected to the handle part 1 at one end and can elastically bend and deform, and a coil spring (elastic connection section 2.2) that is coaxially and fixedly connected to the other end of the thin metal rod at one end and can elastically bend, stretch and contract. The other end of the coil spring is coaxially and fixedly connected to the scale section 3.

[0025] Embodiment 3

[0026] The scale portion 3 includes a scale ruler 3.1 and a capillary oil groove structure 3.2 arranged along its length direction. The capillary oil groove structure 3.2 can stably store engine oil along the length direction of the scale ruler 3.1, assist in reading the data of the scale portion 3, and avoid affecting the data reading accuracy of the scale portion 3 due to scratches between the scale portion 3 and the channel wall of the engine oil filling passage. One or more capillary oil groove structures 3.2 are arranged on the surface of the scale ruler 3.1 along its length direction. A mesh oil groove 3.3 is arranged on the scale ruler 3.1. When the scale portion 3 is slightly in contact with the channel wall, the concave structure of the mesh oil groove 3.3 can accommodate the oil liquid shed by scratches, avoiding the formation of an "oil cut-off area"; it is a functional supplement to the capillary oil groove structure and is more a systematic solution for dealing with complex working conditions (tilting, scratching, low temperature). Through the four mechanisms of three-dimensional oil locking, collaborative capillarity, scratch resistance, and visual enhancement, the reading reliability of the dipstick is improved from "empirical judgment" to "accurate quantification", which is especially suitable for the demanding requirements of high-end engines (such as turbocharging and hybrid) for the oil level accuracy.

[0027] Embodiment Four

[0028] The capillary oil groove structure 3.2 includes an oil groove seat fixedly connected to the scale ruler 3.1 and integrated with the scale ruler 3.1. A capillary oil groove is opened on the length surface of the side away from the scale ruler 3.1, and the capillary oil groove can stably store engine oil. The width and depth of the capillary oil groove are both 1 - 2 mm.

[0029] Embodiment Five

[0030] A reading method for the above dipstick assembly structure: Manually hold and rotate the dipstick handle 1.2 to pull out the dipstick assembly structure from the engine oil filling port, read the scale value of the oil liquid at the highest point in the capillary oil groove structure. After reading the data, insert the dipstick assembly structure into the engine oil filling port and fix the dipstick assembly structure at the engine oil filling port through the sealing thread section 1.1.

[0031] In summary, the present invention can effectively eliminate the interference of factors such as the shaking of engine oil and the uneven distribution of engine oil on the surface of the scale ruler during the extraction of the dipstick to the reading through the reading method of reading the scale value of the oil liquid at the highest point in the capillary oil groove structure 3.2, ensuring that the read engine oil level data is accurate and reliable.

[0032] Here, it should be noted that the description of the above technical solutions is exemplary. This specification can be embodied in different forms and should not be construed as limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are only defined by the scope of the claims. The shapes, sizes, ratios, angles, and numbers disclosed for various aspects of this specification and the claims are merely examples. Therefore, this specification and the claims are not limited to the details shown. In the following description, when the detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of this specification and the claims, the detailed description will be omitted. When using "comprising", "having", and "including" described in this specification, there may also be another part or other parts, and the terms used can generally be singular but can also represent plural forms.

[0033] Finally, it should be pointed out that the above embodiments are only relatively representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and there can be many variations. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention should be considered to fall within the protection scope of the present invention.

Claims

1. An oil dipstick assembly structure, comprising a handle portion (1) and a scale portion (3), characterized in that: A flexible connection portion (2) is connected between the handle portion (1) and the scale portion (3) for adapting to the inner hole bending shape of the oil filling channel, enabling the scale portion (3) to accurately reach the oil level measurement position and avoiding the scale portion (3) and the channel wall of the oil filling channel from being scraped when the scale portion (3) is withdrawn from the oil filling channel, thereby affecting the data reading accuracy of the scale portion (3); the scale portion (3) comprises a scale (3.1) and a capillary oil groove structure (3.2) arranged along its length direction; the capillary oil groove structure (3.2) can stably store oil along the length direction of the scale (3.1), assist in data reading of the scale portion (3), and avoid the scale portion (3) and the channel wall of the oil filling channel from being scraped, thereby affecting the data reading accuracy of the scale portion (3).

2. The oil dipstick assembly structure according to claim 1, characterized in that: The flexible connection portion (2) comprises a support connection section (2.1) having one end coaxially fixedly connected to the handle portion (1) as an integral structure and capable of elastic bending and deformation, and an elastic connection section (2.2) having one end coaxially fixedly connected to the other end of the support connection section (2.1) as an integral structure and capable of elastic bending, stretching and contraction, the other end of the elastic connection section (2.2) being coaxially fixedly connected to the scale section (3).

3. The oil dipstick assembly structure according to claim 2, characterized in that: The supporting connection section (2.1) comprises a sheet metal rod.

4. The oil dipstick assembly structure according to claim 2 or 3, characterized in that: The elastic connecting section (2.2) comprises a coil spring.

5. The oil dipstick assembly structure according to claim 1 or 2, characterized in that: The surface of the scale (3.1) is provided with one or more capillary oil groove structures (3.2) arranged along its length direction.

6. The oil dipstick assembly structure according to claim 5, characterized in that: The capillary oil groove structure (3.2) comprises an oil groove seat which is fixedly connected to the scale (3.1) and is an integral structure with the scale (3.1), and a capillary oil groove is provided on a length surface of a side away from the scale (3.1), and the capillary oil groove can stably store engine oil.

7. The oil dipstick assembly structure according to claim 6, characterized in that: The width and depth of the capillary oil groove are both 1-2 mm.

8. The oil dipstick assembly structure according to claim 5, characterized in that: The scale segment (3) also includes a mesh oil groove (3.3) arranged on the scale (3.1).

9. The oil dipstick assembly structure according to claim 1, characterized in that: The handle portion (1) comprises a sealing threaded section (1.1) coaxially fixedly connected to the flexible connection portion (2) and used to detachably fix the oil dipstick assembly structure at the oil filling port, and an oil dipstick handle (1.2) fixedly connected to an end of the sealing threaded section (1.1) away from the flexible connection section (2).

10. A method for reading the oil dipstick assembly structure according to any one of claims 1 to 9, characterized in that: The method comprises the steps of pulling the oil dipstick assembly structure out of the oil filling port through the handle portion (1) and reading the scale value of the oil at the highest point in the capillary oil groove structure.

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