Locking and sealing device for engine oil dipstick

Abstract

The engine oil dipstick locking and sealing device comprises a dipstick core and a dipstick tube, the dipstick core comprises a handle, a rotating mandrel, a dipstick, a pressing block, a sealing plug and a limiting block, the handle, the rotating mandrel, the dipstick, the pressing block, the sealing plug and the limiting block are sequentially arranged and assembled from top to bottom, the upper end of the dipstick tube is an upper tube opening, and the lower end of the dipstick tube is a lower tube opening. A through hole I is formed in the center of the sealing plug, the limiting block is located below the sealing plug, a through hole II is formed in the center of the limiting block, the pressing block is located above the sealing plug, a flange is arranged on the pressing block, the lower plane of the flange makes contact with the upper end face of the ruler tube, and the bottom face of the pressing block tightly presses the sealing plug. A through hole III is formed in the center of the pressing block, and the ruler sequentially penetrates through the through hole III, the through hole I and the through hole II from top to bottom. By the adoption of the technical scheme, the structure is simple, operation is convenient and fast, better sealing and locking functions can be achieved, and terminal user operation is friendly.

Description

Technical Field

[0001] This utility model relates to the field of oil dipsticks, and in particular to an oil dipstick locking and sealing device. Background Technology

[0002] The purpose of the engine oil dipstick is to monitor and indicate the engine oil level, ensuring that the oil level is within the appropriate range. An oil dipstick assembly generally consists of a dipstick core and a dipstick tube. The dipstick core typically comprises a handle, a sealing ring, and the dipstick itself. The parts where the dipstick core and dipstick tube mate must have a sealing function, and the dipstick core must not detach from the dipstick tube during use.

[0003] Currently, sealing and locking are typically achieved using the following methods: Method 1: An O-ring or a specially designed shaped ring is used with a handle to achieve a seal with the measuring tube. Method 2: Locking is achieved by adding a chuck to the handle and rotating it to a designated position to achieve axial limiting. Method 3: An O-ring or a shaped sealing ring is used in an interference fit with the measuring tube to achieve a seal.

[0004] The above solutions are limited in function, lack adequate sealing and locking capabilities, and are inconvenient to operate. Utility Model Content

[0005] The purpose of this invention is to provide an oil dipstick locking and sealing device with good sealing and locking performance and convenient use, in order to solve the problems of insufficient sealing and locking function and inconvenient operation of existing oil dipsticks.

[0006] The technical solution adopted by this utility model is: an oil dipstick locking and sealing device, including a dipstick core and a dipstick tube. The dipstick core includes a handle, a rotating spindle, a dipstick, a pressure block, a sealing plug, and a limiting block. The handle, rotating spindle, dipstick, pressure block, sealing plug, and limiting block are arranged and assembled in sequence from top to bottom. The upper part of the handle is a horizontal gripping part, and the lower part is a vertical support part. The gripping part and the support part are connected to form a "7" shape. The inner side of the support part is a slope, and the outer side is a vertical plane. The lower end of the handle is provided with a mounting groove and a mounting hole for installing the dipstick core. The mounting hole is provided with... A rotating mandrel is provided, which is clearance-fitted with a mounting hole. The upper part of the scale is inserted into the mounting groove. After the rotating mandrel passes through the upper part of the scale, it is riveted to the handle to position the scale in the mounting groove. The upper end of the scale tube is the upper tube opening, and the lower end is the lower tube opening. The scale is inserted through the upper tube opening and exits through the lower tube opening. A mounting part is provided on the outer side of the lower part of the scale tube. A through hole I is provided in the center of the sealing plug. The limiting block is located below the sealing plug, and a through hole II is provided in the center of the limiting block. Chamfers are provided on both sides below the limiting block. The pressure block is located above the sealing plug, and a... The device has a flange, with its lower surface contacting the upper end face of the ruler tube. A pressure block tightly presses against the sealing plug. A through hole III is located at the center of the pressure block. Through holes I, II, and III are aligned with each other. The cross-sectional shape of through hole I matches the cross-sectional shape of the ruler core. The ruler passes through through holes III, I, and II sequentially from top to bottom. A square groove is also provided on the limiting block, within which a limiting shaft is installed. A limiting shaft hole is located at the top of the ruler core, through which the limiting shaft passes. When the ruler core is lifted, the limiting shaft is engaged within the square groove. The axial direction of the sealing plug... The compressibility must be greater than the sum of the gap between the handle and the pressure block, the difference between the distance from the rotating spindle to the pressure block and the vertical distance from the rotating spindle to the inclined surface of the support, and the minimum distance from the limiting shaft to the chamfer below the limiting block. When the handle is pulled upward, the sealing plug is in a naturally extended state. When the handle is pulled downward, the inclined surface of the support pushes against the pressure block and lifts the ruler core. The upper end face of the limiting block presses against the bottom surface of the sealing plug, the bottom surface of the pressure block presses against the top surface of the sealing plug, the sealing plug is compressed and expanded, and the side wall of the sealing plug presses against the inner wall of the ruler tube.

[0007] A further technical solution of this utility model is: when the sealing plug is in its naturally extended state, the size of the through hole I is larger than the cross-sectional size of the scale, so that the sealing plug can move freely on the scale when it is in its naturally extended state.

[0008] A further technical solution of this utility model is: the sealing plug is cylindrical, and the cylindrical surface is provided with grooves.

[0009] A further technical solution of this utility model is: the upper end of the ruler tube is provided with a chamfer.

[0010] The beneficial effects of this utility model are as follows: due to the adoption of the above technical solution, the oil dipstick locking and sealing device of this utility model has a simple structure, is easy to operate, can achieve better sealing and locking functions, and is user-friendly to end users. Attached Figure Description

[0011] Figure 1 This is a front view structural diagram of the oil dipstick locking and sealing device described in this utility model;

[0012] Figure 2 This is a side view of the oil dipstick locking and sealing device of this utility model.

[0013] Figure 3 This is a schematic diagram of the structure when the handle is bent down;

[0014] Figure 4 This is a schematic diagram of the structure of the ruler core;

[0015] Figure 5 This is a schematic diagram of the upper part of the ruler core. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] Example:

[0018] like Figures 1 to 5The oil dipstick locking and sealing device shown includes a dipstick core 1 and a dipstick tube 2. The dipstick core includes a handle 101, a rotating spindle 102, a scale 103, a pressure block 104, a sealing plug 105, and a limiting block 106. The handle 101, rotating spindle 102, scale 103, pressure block 104, sealing plug 105, and limiting block 106 are arranged sequentially from top to bottom. The upper part of the handle 101 is a horizontal gripping part, and the lower part is a vertical support part. The gripping part and the support part are connected to form a "7" shape. The inner surface of the support part is a slope, and the outer surface is a vertical plane. The lower end of the handle is provided with a mounting groove and a mounting hole for installing the dipstick core. The rotating spindle core is installed in the mounting hole. The scale is inserted into the mounting groove, and the rotating mandrel 102 passes through the upper part of the scale and is riveted to the handle to position the scale in the mounting groove. The upper end of the scale tube is the upper tube opening, and the lower end is the lower tube opening. The scale is inserted through the upper tube opening and exits through the lower tube opening. A mounting part 21 is provided on the lower outer side of the scale tube. A through hole I is provided in the center of the sealing plug. The limiting block is located below the sealing plug, and the upper end face of the limiting block is in close contact with the bottom surface of the sealing plug. A through hole II is provided in the center of the limiting block. Chamfers are provided on both sides below the limiting block. A flange is provided on the pressure block, and the lower surface of the flange contacts the upper end face of the scale tube. The bottom surface of the block tightly presses against the sealing plug. A through hole III is provided in the center of the block. Through holes I, II, and III are aligned with each other. The cross-sectional shape of through hole I matches the cross-sectional shape of the ruler core. The ruler passes through through holes III, I, and II sequentially from top to bottom. A square groove is also provided on the limiting block, and a limiting shaft 107 is provided within the groove. A limiting shaft hole is provided on the upper part of the ruler core, through which the limiting shaft passes. When the ruler core is lifted, the limiting shaft is engaged in the square groove. The limiting shaft cooperates with the limiting block to prevent the block, sealing plug, and limiting block from slipping off the ruler. The compressibility of the sealing plug 105 must be greater than that of the handle 101 and the block 10. The sum of the following three factors—the gap distance between the four components, the difference between the distance 10101 from the rotating spindle 102 to the pressure block 104 and the vertical distance 10102 from the rotating spindle 102 to the inclined surface of the support part, and the minimum distance from the limiting shaft 107 to the chamfer below the limiting block 106—is used to achieve a good sealing effect and user experience when the handle is pulled upwards. When the handle is pulled downwards, the inclined surface of the support part lifts the ruler core by pressing against the pressure block. The upper end face of the limiting block presses against the bottom surface of the sealing plug, and the bottom surface of the pressure block presses against the top surface of the sealing plug. The sealing plug is compressed and expanded, and the side wall of the sealing plug presses against the inner wall of the ruler tube. When the handle is pulled downwards, a good sealing effect and user experience can be achieved.

[0019] The sealing plug is an elastic body. When the handle rotates around the rotating spindle at a certain angle, the limiting block can be lifted, causing it to press the sealing plug upward, deforming the sealing plug, and making it tightly contact the ruler tube, thus achieving the function of sealing and locking.

[0020] In use, the sealing plug on the ruler core 1 cooperates with the ruler tube, the ruler core is inserted into the ruler tube 2, the handle is rotated, the limit block is lifted, the sealing plug is axially compressed and its radial expansion is achieved, so as to realize the sealing and locking effect between the ruler core and the ruler tube 2.

[0021] Furthermore, when the sealing plug is in its naturally extended state, the size of the through hole I is larger than the cross-sectional size of the scale, so that the sealing plug can move freely on the scale when it is in its naturally extended state.

[0022] Furthermore, the sealing plug is cylindrical, and grooves are provided on the cylindrical surface.

[0023] Furthermore, the upper end of the ruler tube is provided with a chamfered structure, which serves as a guide when the sealing plug is inserted.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A locking and sealing device for an oil dipstick, characterized in that: The device includes a ruler core and a ruler tube. The ruler core includes a handle, a rotating spindle, a scale, a pressure block, a sealing plug, and a limiting block. These components are arranged sequentially from top to bottom. The upper part of the handle is a horizontal gripping part, and the lower part is a vertical support part. The gripping part and the support part are connected to form a "7" shape. The inner surface of the support part is inclined, and the outer surface is a vertical plane. The lower end of the handle has a mounting groove and a mounting hole for installing the ruler core. A rotating spindle is installed in the mounting hole, and the rotating spindle is clearance-fitted into the mounting hole. The upper part of the scale is inserted into the mounting groove. After the rotating mandrel passes through the upper part of the scale, it is riveted to the handle to position the scale in the mounting groove. The upper end of the scale tube is the upper tube opening, and the lower end is the lower tube opening. The scale is inserted through the upper tube opening and exits through the lower tube opening. A mounting part is provided on the outer side of the lower part of the scale tube. A through hole I is provided in the center of the sealing plug. The limiting block is located below the sealing plug. A through hole II is provided in the center of the limiting block. Chamfers are provided on both sides below the limiting block. A flange is provided on the pressure block, and the lower plane of the flange is flush with the upper end of the scale tube. The pressure block has a surface contact, with its bottom surface tightly pressing against the sealing plug. A through hole III is located at the center of the pressure block. Through holes I, II, and III are aligned with each other. The cross-sectional shape of through hole I matches the cross-sectional shape of the ruler core. The ruler passes through through holes III, I, and II sequentially from top to bottom. A square groove is also provided on the limiting block, within which a limiting shaft is installed. A limiting shaft hole is provided at the top of the ruler core, through which the limiting shaft passes. When the ruler core is lifted, the limiting shaft is engaged within the square groove. The axial compressibility of the sealing plug needs to be large. The sum of the gap distance between the handle and the pressure block, the difference between the distance from the rotating spindle to the pressure block and the vertical distance from the rotating spindle to the inclined surface of the support part, and the minimum distance from the limiting shaft to the chamfer below the limiting block, when the handle is pulled upward, the sealing plug is in a naturally extended state; when the handle is pulled downward, the inclined surface of the support part pushes against the pressure block and lifts the ruler core; the upper end face of the limiting block pushes against the bottom surface of the sealing plug, the bottom surface of the pressure block pushes against the top surface of the sealing plug, the sealing plug is compressed and expanded, and the side wall of the sealing plug pushes against the inner wall of the ruler tube.

2. The oil dipstick locking and sealing device according to claim 1, characterized in that: When the sealing plug is in its naturally extended state, the size of the through hole I is larger than the cross-sectional size of the scale, so that the sealing plug can move freely on the scale when it is in its naturally extended state.

3. The oil dipstick locking and sealing device according to claim 1, characterized in that: The sealing plug is cylindrical, and grooves are provided on the cylindrical surface.

4. The oil dipstick locking and sealing device according to claim 1, characterized in that: The upper end of the ruler tube is chamfered.

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