Composite piston pin
By designing the support structure and lubricating oil groove in the piston pin, the deformation problem of the piston pin when it withstands alternating impact force and pressure is solved, the strength and lubrication effect of the piston pin are improved, and the high strength and lightweight requirements of the internal combustion engine are met.
Patent Information
- Application Number
- CN202421167446.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-27
AI Technical Summary
When existing piston pins are subjected to alternating impact force and pressure of the connecting rod generated by the reciprocating movement of the piston, they are prone to deformation, which cannot meet the high-strength requirements of internal combustion engine strengthening and lightweighting.
A composite piston pin is designed to form a support structure to increase strength and store lubricating oil through the oil tank to reduce friction by providing positioning grooves and inlay seats on the inner wall of the pin body, and installing positioning plates and oil tanks on the outside.
Through the support structure of the inline seat and positioning plate, the strength and stiffness of the piston pin are increased, and the bending deformation is reduced. At the same time, the lubricating oil tank is arranged to improve the lubrication effect and reduce friction and wear.
Smart Images
Figure CN222502640U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of piston pins, in particular to a composite piston pin. Background Art
[0002] The piston pin is installed in the piston. The piston and connecting rod are connected by the piston pin to form a kinematic pair combination. It is an important power conversion and output mechanism of the internal combustion engine. It undertakes the main function of converting thermal energy into mechanical work. The piston, connecting rod and piston pin have a large inertia force due to high-speed movement in the cylinder sleeve. With the continuous improvement of the strengthening degree and lightweight requirements of the internal combustion engine, higher requirements are also put forward for the weight of the piston pin.
[0003] The piston pin is a cylindrical pin installed on the piston skirt. Its middle part passes through the small hole of the connecting rod and is used to connect the piston and the connecting rod. The function of the piston pin is to transfer the explosion pressure of the piston to the connecting rod to drive the crankshaft to rotate and realize the operation of the engine.
[0004] During operation, since the piston pin is tubular in shape, hollow in the middle and has no supporting structure, it has to withstand the alternating impact force generated by the reciprocating motion of the piston and the pressure of the connecting rod when working. The combined effect of these forces can easily cause it to deform. Utility Model Content
[0005] The purpose of the utility model is to provide a composite piston pin to solve the defects mentioned in the above background technology.
[0006] To achieve the above object, a composite piston pin is provided, comprising a piston pin body, wherein the piston pin body is inserted into the interior of a piston cylinder, a connecting rod is installed at the bottom of the piston cylinder, and a top of the connecting rod is inserted into the interior of the piston cylinder and movably connected through the piston pin body;
[0007] The piston pin body comprises a pin body, and a positioning groove is arranged on the inner wall of the pin body, an embedded seat is installed inside the pin body, and a positioning plate is fixedly installed on the outer side of the embedded seat.
[0008] Preferably, six groups of oil grooves are evenly arranged on the outer surface of the pin body, and the length of the oil grooves is smaller than the length of the pin body, and the cross-sections of the oil grooves are all arranged in an arc shape.
[0009] Preferably, the angle between two adjacent groups of oil grooves is 60°, and four groups of positioning grooves are evenly arranged on the inner wall of the pin body, and the angle between two adjacent groups of positioning grooves is 90°.
[0010] Preferably, the size of the positioning plate is adapted to that of the positioning groove, and the positioning plate is inserted into the interior of the positioning groove, and the cross-sections of the positioning plate and the positioning groove are both rectangular.
[0011] Preferably, four groups of positioning plates are evenly arranged on the outer side of the embedded seat, and the four groups of positioning plates are arranged in a cross shape.
[0012] Preferably, screw holes are provided at the ends of the four groups of positioning plates, and through holes are provided at the bottoms of the four groups of positioning grooves. Long bolts are installed inside the screw holes, and the long bolts pass through the through holes and are screwed inside the screw holes.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The embedded seat and the positioning plate are inserted and fixed inside the pin body, which can reinforce the pin body. The embedded seat and the positioning plate form support for the inside of the pin body, thereby increasing the strength of the piston pin and reducing the bending deformation during work, ensuring the rigidity and strength of the piston pin structure, and also enhancing the stability of the internal structure of the piston pin body;
[0015] Six groups of oil grooves are evenly arranged on the outer surface of the pin body. The six groups of oil grooves can store a certain amount of lubricating oil, continuously providing lubricating oil to the contact surface between the piston pin and related components during the movement of the piston, thereby reducing friction and wear. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the front view of the structure of the utility model;
[0017] Figure 2 The utility model structure Figure 1 A top view of
[0018] Figure 3 The utility model structure Figure 1 Axonometric view of
[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the piston pin structure of the utility model;
[0020] Figure 5 This is a schematic diagram of the structure of the utility model in which the piston pin body is installed on the piston cylinder.
[0021] Numbers in the figure: 1, piston cylinder; 2, connecting rod; 3, piston pin body; 31, pin body; 32, oil groove; 33, positioning groove; 34, embedded seat; 35, positioning plate; 36, long bolt. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] See also Figure 1-5 The utility model provides a composite piston pin, including a piston pin body 3, the piston pin body 3 is inserted into the interior of a piston cylinder 1, and a connecting rod 2 is installed at the bottom of the piston cylinder 1, and the top of the connecting rod 2 is inserted into the interior of the piston cylinder 1 and is movably connected through the piston pin body 3;
[0024] The piston pin body 3 includes a pin body 31 , and a positioning groove 33 is provided on the inner wall of the pin body 31 . An inner seat 34 is installed inside the pin body 31 , and a positioning plate 35 is fixedly installed outside the inner seat 34 .
[0025] Working principle: When in use, the embedded seat 34 is inserted into the interior of the pin body 31, and is positioned and installed through four groups of positioning plates 35 and four groups of positioning grooves 33. At this time, the embedded seat 34 and the positioning plates 35 are inserted and fixed inside the pin body 31, which can reinforce the pin body 31. The embedded seat 34 and the positioning plates 35 form support for the inside of the pin body 31, thereby increasing the strength of the piston pin and reducing the bending deformation that occurs during work, ensuring the rigidity and strength of the piston pin structure, and also enhancing the stability of the internal structure of the piston pin body.
[0026] As a preferred embodiment, six groups of oil grooves 32 are evenly arranged on the outer surface of the pin body 31 , and the length of the oil grooves 32 is smaller than the length of the pin body 31 , and the cross-sections of the oil grooves 32 are all arc-shaped.
[0027] The angle between two adjacent groups of oil grooves 32 is 60°, and four groups of positioning grooves 33 are evenly arranged on the inner wall of the pin body 31 , and the angle between two adjacent groups of positioning grooves 33 is 90°.
[0028] like Figure 1-5 As shown: four groups of positioning grooves 33 are evenly arranged on the inner wall of the pin body 31, and the positioning grooves 33 are adapted to the size of the positioning plate 35. When the insertion is completed, they are screwed and fixed by long bolts 36.
[0029] The size of the positioning plate 35 matches that of the positioning groove 33 , and the positioning plate 35 is inserted into the interior of the positioning groove 33 . Meanwhile, the cross-sections of the positioning plate 35 and the positioning groove 33 are both rectangular.
[0030] As a preferred implementation, four groups of positioning plates 35 are evenly arranged on the outer side of the embedded seat 34 , and the four groups of positioning plates 35 are arranged in a cross shape.
[0031] like Figure 1-5 As shown: four groups of positioning plates 35 are arranged in a cross shape and inserted into the interior of the pin body 31, which can fix and support the interior of the pin body 31, improve the strength and rigidity of the pin body 31, and prevent it from bending and deforming when subjected to force.
[0032] As a preferred embodiment, screw holes are provided at the ends of the four groups of positioning plates 35, and through holes are provided at the bottoms of the four groups of positioning grooves 33. Long bolts 36 are installed inside the screw holes, and the long bolts 36 pass through the through holes and are screwed inside the screw holes.
[0033] like Figure 1-5 As shown: six groups of oil grooves 32 are evenly arranged on the outer surface of the pin body 31. The setting of the six groups of oil grooves 32 can store a certain amount of lubricating oil, and continuously provide lubricating oil to the contact surface between the piston pin and related components during the movement of the piston, thereby reducing friction and wear; improving the lubrication effect: ensuring that the lubricating oil can be evenly distributed on the friction surface, and improving the stability and reliability of lubrication.
[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A composite piston pin, comprising a piston pin body (3), characterized in that: The piston pin body (3) is inserted into the interior of the piston cylinder (1), and the connecting rod (2) is installed at the bottom of the piston cylinder (1), while the top of the connecting rod (2) is inserted into the interior of the piston cylinder (1) and is movably connected through the piston pin body (3); The piston pin body (3) comprises a pin body (31), and a positioning groove (33) is provided on the inner wall of the pin body (31). An inner seat (34) is installed inside the pin body (31), and a positioning plate (35) is fixedly installed outside the inner seat (34).
2. A composite piston pin according to claim 1, characterized in that: Six groups of oil grooves (32) are evenly arranged on the outer surface of the pin body (31), and the length of the oil grooves (32) is shorter than the length of the pin body (31). Meanwhile, the cross-sections of the oil grooves (32) are all arranged in an arc shape.
3. A composite piston pin according to claim 2, characterized in that: The angle between two adjacent groups of oil grooves (32) is 60°, and four groups of positioning grooves (33) are evenly arranged on the inner wall of the pin body (31), and the angle between two adjacent groups of positioning grooves (33) is 90°.
4. A composite piston pin according to claim 1, characterized in that: The size of the positioning plate (35) is matched to that of the positioning groove (33), and the positioning plate (35) is inserted into the interior of the positioning groove (33). The cross-sections of the positioning plate (35) and the positioning groove (33) are both rectangular.
5. The composite piston pin according to claim 1, characterized in that: Four groups of positioning plates (35) are evenly arranged on the outer side of the embedded seat (34), and the four groups of positioning plates (35) are arranged in a cross shape.
6. The composite piston pin according to claim 1, characterized in that: The ends of the four groups of positioning plates (35) are all provided with screw holes, and the bottoms of the four groups of positioning grooves (33) are all provided with through holes, and long bolts (36) are installed inside the screw holes, and the long bolts (36) pass through the through holes and are screwed inside the screw holes.