Piston pin pressure test detection structure
By designing a piston pin pressure testing structure and using components such as sealing rings and bolts to form a sealed environment, the limitations of human visual observation and subjective judgment in piston pin testing are overcome, enabling accurate testing and performance evaluation of piston pins.
Patent Information
- Application Number
- CN202520023499.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-06
AI Technical Summary
Current piston pin machining quality inspection relies on human visual observation and subjective judgment, making it difficult to detect subtle defects or internal problems, leading to inspection errors and safety hazards.
A piston pin pressure testing structure is designed, including a base, an upper cover, and a lower cover. It uses components such as O-rings and hinge bolts to form a sealed environment, and tests the sealing and pressure resistance performance of the piston pin through pressure testing.
It enables precise positioning and repeatable testing of piston pins, ensuring the consistency and accuracy of test data, effectively evaluating their sealing and pressure resistance performance, and reducing testing errors and safety hazards.
Smart Images
Figure CN223710988U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to processing technical field especially, relates to a piston pin pressure test detection structure. BACKGROUND
[0002] In the modern engine technical field, as one of core components, each component of the piston plays a vital role in the overall performance of the engine. The piston pin is in a key position, and it continuously bears alternating tensile and compressive loads during engine operation. This complex and frequent stress state poses extremely stringent requirements on the processing quality of the piston pin. Because the processing quality of the piston pin is directly related to the service life of the piston and the safety of the entire engine operation.
[0003] In the current piston pin processing technology, the conventional detection means mainly relies on visual inspection and surface flaw detection. However, these detection methods have obvious limitations. Visual inspection is highly dependent on the subjective judgment and experience accumulation of the operator, and requires the operator to have high skill level. Even so, due to the limitations of human eye observation and the error of subjective judgment, some subtle processing defects or internal quality problems are often difficult to detect, which can easily cause omissions. SUMMARY
[0004] In order to make up for the above shortcomings, the utility model provides a piston pin pressure test detection structure, which aims to improve the limitations of human eye observation and the error of subjective judgment in the prior art.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a piston pin pressure test detection structure, comprising a base, the bottom of the base is fixedly connected with a lower cover, the top of the lower cover is fixedly connected with an upper cover through a pin shaft, the end face of the upper cover is fixedly connected with a pipe joint, and the middle part of the pin shaft is threadedly connected with an articulated bolt.
[0006] As a further description of the above technical scheme:
[0007] The upper cover and the lower cover are both provided with steps, and O-shaped sealing rings are installed on the steps of the upper cover and the lower cover.
[0008] As a further description of the above technical scheme:
[0009] The upper cover and the lower cover with the installed O-shaped sealing rings are placed between the piston pin.
[0010] As a further description of the above technical scheme:
[0011] The lower cover shell is threadedly connected with two bolts at the bottom.
[0012] As a further description of the above technical solutions:
[0013] The pin shaft is inserted with an open pin, and the open pin is used to prevent the pin shaft from falling off from the connecting position of the upper cover and the lower cover.
[0014] As a further description of the above technical solutions:
[0015] The top of the hinge bolt is fixedly connected with a hex thick nut.
[0016] As a further description of the above technical solutions:
[0017] The hinge bolt is used to adjust the position of the O-shaped sealing ring between the upper cover and the lower cover.
[0018] The utility model has the advantages of the following beneficial effects:
[0019] In the utility model, the connection between the base, the upper and lower covers and other components is accurate, the pin shaft and the open pin are used to stably connect, the positioning is accurate and repeatable when the piston pin is detected, the detection data is consistent and comparable, and the quality control is solidly established. The detection mode of pressing and pressure maintaining of the piston pin oil hole can actually evaluate the sealing and pressure resistance performance, and the pressure change is accurately monitored when the pressure is maintained. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 The utility model provides a lower cover sectional view of piston pin pressure test detection structure;
[0021] Figure 2 The utility model provides a front view of piston pin pressure test detection structure.
[0022] LEGEND:
[0023] 1, piston pin; 2, pin shaft; 3, hex thick nut; 4, hinge bolt; 5, open pin; 6, O-shaped sealing ring; 7, pipe joint; 8, bolt; 9, upper cover; 10, lower cover; 11, base. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0025] REFERENCE Figure 1 and 2The utility model provides a kind of embodiment: a piston pin pressure test detection structure, including base 11, base 11 is as the basis supporting component of entire pressure test detection structure, and stable mounting platform is provided for other components on it, base 11 top is fixedly connected with lower cover 10, lower cover 10 top is fixedly connected with upper cover 9 by pin shaft 2, pin shaft 2 plays the key role of connecting upper cover 9 and lower cover 10, so that upper cover 9 can be relative lower cover 10 specific rotation or positioning operation is guaranteed, and the operability and sealability of structure.Upper cover 9 end face is fixedly connected with pipe joint 7, the setting of pipe joint 7 is convenient for subsequent connection with external pressure test equipment or pipeline, to realize the functions such as the import or monitoring of pressure, pin shaft 2 middle part is screw connected with universal bolt 4, and the screw connection mode of universal bolt 4 and pin shaft 2 provides the possibility for adjusting pressure sealing relationship inside structure, and the relative position and sealing effect of other components can be indirectly influenced by the operation of universal bolt 4.
[0026] Refer to Figure 1 And 2 , upper cover 9 and lower cover 10 are provided with step, and upper cover 9 and lower cover 10 step are all installed with O type sealing ring 6, and step provides stable mounting position and sealing contact surface for O type sealing ring 6, when piston pin 1 is placed between upper cover 9 and lower cover 10 and is assembled, O type sealing ring 6 can better contact piston pin 1 and the inner wall of upper cover 9 and lower cover 10 under the restriction and extrusion of step, to form effective sealing environment, prevent the leakage of liquid or gas in pressure test, and ensure the accuracy and reliability of pressure test.
[0027] Refer to Figure 1 And 2 , piston pin 1 is placed between upper cover 9 and lower cover 10 of O type sealing ring 6 installed, and piston pin 1 is placed in this position is the core object of entire pressure test, and through the cooperation of upper cover 9, lower cover 10 and O type sealing ring 6 installed at their steps, piston pin 1 is in a relatively sealed space, so as to detect its sealing performance and evaluate its performance under certain pressure, to effectively test the quality and reliability of piston pin 1 under the sealing pressure environment in actual use.
[0028] Refer to Figure 1 And 2 , two bolts 8 are screw connected on the bottom of lower cover 10 shell, and the main role of two bolts 8 is to further fix the connection between lower cover 10 and base 11, and enhance the stability and integrity of entire structure.Through screw connection mode, installation and disassembly operation can be conveniently carried out, and the tightening degree of bolt 8 can be adjusted according to actual demand, to adapt to different working conditions and structural stress requirements, ensure that the entire device will not loosen or deform due to internal pressure change or external vibration and other factors during pressure test.
[0029] With reference to Figure 1 and 2 , the pin shaft 2 is inserted with the cotter pin 5, which is used to prevent the pin shaft 2 from falling off from the connecting position of the upper cover 9 and the lower cover 10. During the operation of the entire pressure test detection structure, the pin shaft 2 plays an important role in connecting the upper cover 9 and the lower cover 10. The insertion of the cotter pin 5 effectively limits the accidental displacement of the pin shaft 2 in the axial direction, avoiding the disconnection of the upper cover 9 and the lower cover 10 due to the falling of the pin shaft 2, thereby ensuring the integrity and reliability of the pressure test detection structure during assembly, debugging and testing, maintaining the stability of the sealed environment, and preventing test errors or safety hazards caused by structural looseness.
[0030] With reference to Figure 1 and 2 , the top of the hinge bolt 4 is fixedly connected with the hex thick nut 3, and the fixed connection of the hex thick nut 3 and the hinge bolt 4 provides an easy-to-force and adjust component for the operator. By rotating the hex thick nut 3, the hinge bolt 4 can be moved up and down on the pin shaft 2, thereby changing the relative position relationship between the upper cover 9 and the lower cover 10, exerting different degrees of extrusion pressure on the O-ring 6 installed at the step, and achieving precise adjustment of the sealing effect to meet the requirements of different piston pins 1 or test conditions for sealing pressure.
[0031] With reference to Figure 1 and 2 , the hinge bolt 4 is used to adjust the position of the O-ring 6 between the upper cover 9 and the lower cover 10. When the sealing performance needs to be adjusted, the hex thick nut 3 connected with the hinge bolt 4 is rotated, and the hinge bolt 4 moves along the pin shaft 2, thereby changing the distance between the upper cover 9 and the lower cover 10, so that the O-ring 6 is subjected to different degrees of extrusion deformation. This deformation can adjust the contact pressure and sealing area between the O-ring 6 and the piston pin 1, as well as the inner walls of the upper cover 9 and the lower cover 10, thereby optimizing the sealing effect and ensuring that the piston pin 1 can provide a reliable sealing environment under different pressure test requirements, ensuring the accuracy and effectiveness of the test data.
[0032] Working principle: First, install the O-ring 6 to the step of the lower cover 10, and ensure that the O-ring 6 is flatly attached to the step surface without twisting and wrinkling during installation. Then, place the piston pin 1 into the lower cover 10 with the installed O-ring 6, and ensure the accuracy of the position of the piston pin 1 so that it can form a preliminary sealing contact relationship with the O-ring 6 in the lower cover 10.
[0033] Then, another O-shaped sealing ring 6 is installed at the step of the upper cover 9, and the flatness and integrity of the installation should be ensured. After that, the upper cover 9 is rotated by the pin shaft 2, and the relative position between the upper cover 9 and the lower cover 10 should be ensured during the rotation, so that the upper cover 9 can gradually approach the lower cover 10 and seal the piston pin 1 inside. At this time, the piston pin 1 has been preliminarily wrapped in the sealing space formed by the upper cover 9 and the lower cover 10 and the O-shaped sealing ring 6 at the steps of the upper cover 9 and the lower cover 10, but the sealing effect has not reached the best state.
[0034] Subsequently, the hexagonal thick nut 3 is rotated, and due to the close connection between the hexagonal thick nut 3 and the universal bolt 4, the universal bolt 4 will stably rise along the pin shaft 2 as the hexagonal thick nut 3 is rotated. During the rising of the universal bolt 4, an upward force will be applied to the upper cover 9, so that the relative counter-pressing movement between the upper cover 9 and the lower cover 10 is generated. Under the counter-pressing action, the O-shaped sealing ring 6 installed at the steps of the upper cover 9 and the lower cover 10 will be deformed, and the deformation of the O-shaped sealing ring 6 will make it more closely contact with the outer circular oil hole surface of the piston pin 1, thereby generating a reliable sealing effect and successfully realizing the sealing of the horizontal oil hole.
[0035] At this time, the piston pin is in a good sealing state, and the entire pressure test detection structure has the condition for carrying out a sealing pressure test. When carrying out the sealing pressure test, the external pressure testing equipment can be connected through the pipe joint 7 fixedly connected to the end surface of the upper cover 9, a predetermined pressure is gradually applied to the sealing space, and the pressure value is accurately recorded and monitored through the corresponding pressure monitoring device, so as to comprehensively and accurately detect various performance indicators of the piston pin in the sealing pressure environment, and provide strong data support for the quality evaluation and subsequent application of the piston pin.
[0036] Finally, it should be pointed out that the above description is only a preferred embodiment of the present application and is not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A piston pin pressure testing detection structure comprising a base (11), characterized in that: The base (11) top fixedly connected with the lower cover (10), the lower cover (10) top is fixedly connected with the upper cover (9) through the pin shaft (2), the upper cover (9) end surface is fixedly connected with the pipe joint (7), the pin shaft (2) middle part is threadedly connected with the knuckle bolt (4).
2. The piston pin pressure testing detection structure according to claim 1, wherein: The upper cover (9) and the lower cover (10) are provided with steps, and the upper cover (9) and the lower cover (10) are provided with O-shaped sealing rings (6) at the steps.
3. The piston pin pressure testing detection structure of claim 2, wherein: The upper cover (9) and the lower cover (10) with the O-shaped sealing ring (6) installed therebetween are placed with a piston pin (1).
4. The piston pin pressure testing detection structure of claim 1, wherein: The lower cover (10) shell bottom is threadedly connected with two bolts (8).
5. The piston pin pressure testing detection structure of claim 1, wherein: The pin shaft (2) is inserted with an open pin (5), and the open pin (5) is used to prevent the pin shaft (2) from falling off from the connection position of the upper cover (9) and the lower cover (10).
6. The piston pin pressure testing detection structure of claim 1, wherein: The knuckle bolt (4) top is fixedly connected with a hex thick nut (3).
7. The piston pin pressure testing detection structure of claim 2, wherein: The knuckle bolt (4) is used to adjust the position of the O-shaped sealing ring (6) between the upper cover (9) and the lower cover (10).