Piston with oil storage tank
By designing multiple oil reservoirs and seepage grooves on the piston, the problem of uneven lubricant distribution in traditional pistons is solved, achieving uniform distribution and increased storage capacity of lubricant, extending piston service life and reducing maintenance frequency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN SHENGTAI AUTO PARTS CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-05-15
AI Technical Summary
The oil reservoir structure of traditional piston designs leads to uneven distribution of lubricating oil, causing localized oil shortages that result in wear, and requires frequent oil replenishment, which affects the engine's operational stability and maintenance costs.
Design a piston with multiple oil reservoirs and seepage grooves, including a first oil reservoir, a second oil reservoir, a seepage groove, a seepage ring, an oil collection hole, an oil storage chamber, and an oil delivery channel. The oil collection hole collects lubricating oil and delivers it to the seepage groove, thereby achieving uniform distribution of lubricating oil and expanding the lubrication range.
It increases the storage capacity and distribution range of lubricating oil, reduces wear and the frequency of oil replenishment, extends the service life of pistons, and reduces maintenance costs.
Smart Images
Figure CN224245405U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of piston technology, and more specifically, to a piston having an oil reservoir. Background Technology
[0002] In the core structure of a reciprocating engine, the piston, as a key moving component for converting thermal energy into mechanical energy, has its lubrication performance directly affecting the overall operating efficiency and lifespan of the engine. Traditional piston designs typically use a single oil reservoir in the skirt or pin seat to distribute lubricating oil through the pumping effect generated by the piston's reciprocating motion. However, as modern engines develop towards higher power density and longer maintenance cycles, the technical limitations of this traditional oil reservoir structure are becoming increasingly apparent, necessitating innovative improvements. Traditional pistons with a single oil reservoir can only store a small amount of lubricating oil. During the piston's reciprocating motion, the lubricating oil often cannot cover the entire piston area, limiting the lubrication range. Furthermore, a lack of lubricating oil in certain areas can easily lead to abnormal wear or even thermal failure, affecting the overall operational stability and efficiency. Traditional pistons rely solely on the oil reservoir for oil storage, which can only hold a small amount of lubricating oil. Once the lubricating oil is depleted, it needs to be replenished promptly, resulting in a high frequency of lubrication replenishment and high manual maintenance costs. Utility Model Content
[0003] In view of the aforementioned problems, and in conjunction with the first aspect of this utility model, an embodiment of this utility model provides a piston with an oil reservoir, achieved by the following specific technical means:
[0004] A piston with an oil reservoir includes a piston body, a sealing ring, and a connecting rod. The sealing ring is provided at the top of the piston body, and the connecting rod is provided at the bottom of the piston body. A first oil reservoir is provided on the outer wall of the piston body, a second oil reservoir is provided on the outer wall of the piston body, and an oil seepage groove is provided on the outer wall of the piston body. An oil seepage ring is provided in the oil seepage groove.
[0005] The piston body is provided with multiple sets of oil collecting holes, an oil storage chamber, multiple sets of oil delivery channels at the bottom of the oil storage chamber, and a one-way oil replenishment hole on the outer wall of the piston body.
[0006] According to a preferred embodiment, the outer wall of the piston body is provided with a first oil storage groove and a second oil storage groove, and the first oil storage groove is located at the top of the second oil storage groove.
[0007] According to a preferred embodiment, the bottom of the first oil storage tank is connected to a plurality of oil collection holes, and the piston body has an oil storage cavity, the bottom of the plurality of oil collection holes being connected to the oil storage cavity.
[0008] According to a preferred embodiment, a plurality of oil channels are provided in the piston body, the top of the plurality of oil channels are connected to the oil storage chamber, and the bottom of the plurality of oil channels are connected to the oil seepage groove.
[0009] According to a preferred embodiment, the oil seepage ring is installed inside the oil storage tank, and multiple sets of oil seepage holes are evenly formed on the outer wall of the oil seepage ring.
[0010] According to a preferred embodiment, a pin hole is provided at the bottom of the piston body, a piston pin passes through the pin hole, and retaining rings are provided at both ends of the pin hole.
[0011] According to a preferred embodiment, a connecting groove is provided at the bottom of the piston body, the connecting rod is installed in the connecting groove, and the piston pin passes through the top of the connecting rod.
[0012] The sealing ring is fitted onto the top of the piston body.
[0013] Based on the above aspects, this utility model has the following beneficial effects:
[0014] An oil reservoir is provided within the piston body. Excess lubricating oil in the first oil reservoir is collected into the oil reservoir through an oil collecting hole, increasing the amount of lubricating oil stored in the piston. This ensures a continuous supply of lubricating oil to the piston, reduces wear on the piston body, and also reduces lubricating oil consumption, the frequency of oil replenishment, and downtime for oil replenishment, thereby improving working efficiency. The lubricating oil in the oil reservoir is transported to the oil seepage groove through an oil delivery channel. The lubricating oil is evenly seeped out through the oil seepage ring, working in conjunction with the first and second oil reservoirs to provide lubricating oil to the piston. This expands the lubrication range of the lubricating oil, reduces wear caused by insufficient lubrication on the piston end side, and increases the service life of the piston. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of a piston with an oil reservoir provided in an embodiment of the present invention;
[0016] Figure 2 This is an exploded view of a piston with an oil reservoir provided in an embodiment of the present invention;
[0017] Figure 3 yes Figure 2 Enlarged view of region a in the middle;
[0018] Figure 4 This is a right view of a piston with an oil reservoir provided in an embodiment of the present invention;
[0019] Figure 5 yes Figure 4 Cross-sectional view of AA.
[0020] In the diagram, the correspondence between component names and drawing numbers is as follows:
[0021] 100. Piston body; 101. Sealing ring; 102. Connecting rod; 103. First oil reservoir; 104. Second oil reservoir; 105. Oil seepage groove; 106. Oil seepage ring; 107. Oil collection hole; 108. Oil storage chamber; 109. Oil delivery channel; 110. One-way oil replenishment hole; 111. Oil seepage hole; 112. Pin hole; 113. Piston pin; 114. Snap ring; 115. Connecting groove. Detailed Implementation
[0022] The present invention will now be described in detail with reference to the accompanying drawings. Figure 1 This is a schematic diagram of a piston with an oil reservoir provided in an embodiment of the present invention. Figure 2 This is an exploded view of a piston with an oil reservoir provided in an embodiment of the present invention. Figure 3 yes Figure 2 Enlarged view of region a in the middle. Figure 4 This is a right view of a piston with an oil reservoir provided in an embodiment of the present invention. Figure 5 yes Figure 4 The cross-sectional view of AA is shown below. The following is a detailed introduction to this type of piston with an oil reservoir.
[0023] A piston with an oil reservoir includes a piston body 100, a sealing ring 101, and a connecting rod 102. The sealing ring 101 is provided at the top of the piston body 100, the connecting rod 102 is provided at the bottom of the piston body 100, a first oil reservoir 103 is provided on the outer wall of the piston body 100, a second oil reservoir 104 is provided on the outer wall of the piston body 100, and an oil seepage groove 105 is provided on the outer wall of the piston body 100. An oil seepage ring 106 is provided in the oil seepage groove 105.
[0024] The piston body 100 is provided with multiple sets of oil collecting holes 107 and an oil storage chamber 108. The bottom of the oil storage chamber 108 is provided with multiple sets of oil delivery channels 109. The outer wall of the piston body 100 is provided with a one-way oil replenishment hole 110. When the lubricating oil in the oil storage chamber 108 of the piston body 100 is insufficient, lubricating oil can be replenished into the oil storage chamber 108 through the one-way oil replenishment hole 110 to keep the oil storage chamber continuously providing lubricating oil to the outer wall of the piston body 100, reducing the wear of the outer wall of the piston body 100, thereby increasing the service life of the piston and improving its durability.
[0025] The piston body 100 has a first oil reservoir 103 and a second oil reservoir 104 on its outer wall. The first oil reservoir 103 is located on top of the second oil reservoir 104. The first oil reservoir 103 and the second oil reservoir 104 store a small amount of lubricating oil and continuously release an oil film to the cylinder wall (not shown in the figure) when the piston reciprocates, reducing friction and wear between the piston and the cylinder wall. At the same time, the lubricating oil can be evenly distributed, increasing the lubrication area and improving the practicality of the piston.
[0026] The bottom of the first oil reservoir 103 is connected to multiple sets of oil collection holes 107. An oil storage chamber 108 is provided inside the piston body 100. The bottom of the multiple sets of oil collection holes 107 are all connected to the oil storage chamber 108. Excess lubricating oil in the first oil reservoir 103 can be collected into the oil storage chamber 108 through the oil collection holes 107, which slows down the rate of lubricating oil consumption, thereby reducing the number of times oil needs to be replenished and improving the working efficiency of the piston.
[0027] Multiple sets of oil channels 109 are provided inside the piston body 100. The top of each set of oil channels 109 is connected to the oil storage chamber 108, and the bottom of each set of oil channels 109 is connected to the oil seepage groove 105. When the piston moves upward, the lubricating oil in the oil storage chamber 108 will enter the oil seepage groove 105 through the oil channels 109 due to inertia, providing lubricating oil to the bottom of the piston body 100, reducing the wear of the bottom of the piston body 100, and improving the durability of the piston.
[0028] An oil seepage ring 106 is fitted inside the oil seepage groove 105. Multiple sets of oil seepage holes 111 are evenly opened on the outer wall of the oil seepage ring 106. The lubricating oil in the oil seepage groove 105 seeps into the outer wall through the oil seepage ring 106 to provide lubricating oil to the bottom of the piston body. The oil seepage holes 111 can make the seeping lubricating oil evenly distributed, preventing local lack of lubricating oil from causing direct wear and damage to the piston body 100, reducing the number of times the piston needs maintenance and reducing maintenance costs.
[0029] The piston body 100 has a pin hole 112 at the bottom, and a piston pin 113 passes through the pin hole 112. Both ends of the pin hole 112 are fitted with retaining rings 114. The outer side of the retaining rings 114 is in close contact with the cylinder wall, which can restrict the lateral movement of the piston pin 113 in the pin hole 112, prevent the piston pin 113 from touching the cylinder wall and causing friction and mechanical damage, improve the reliability of the piston, and at the same time improve the overall stability of the piston during operation.
[0030] The piston body 100 has a connecting groove 115 at the bottom, the connecting rod 102 is installed in the connecting groove 115, and the piston pin 113 passes through the top of the connecting rod 102. The connecting groove 115 can provide a certain range of rotation for the piston pin 113 to adapt to different working scenarios and improve the applicability of the piston.
[0031] A sealing ring 101 is fitted on the top of the piston body 100. The sealing ring 101 forms a dynamic seal by tightly fitting the cylinder wall, while controlling the oil film thickness of the cylinder wall to prevent excessive lubricating oil leakage.
[0032] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A piston with an oil reservoir, comprising a piston body (100), a sealing ring (101), and a connecting rod (102), characterized in that: The piston body (100) is provided with a sealing ring (101) at the top, the piston body (100) is provided with a connecting rod (102) at the bottom, the piston body (100) is provided with a first oil storage groove (103) on the outer wall, the piston body (100) is provided with a second oil storage groove (104) on the outer wall, the piston body (100) is provided with an oil seepage groove (105) on the outer wall, and an oil seepage ring (106) is provided in the oil seepage groove (105). The piston body (100) is provided with multiple sets of oil collection holes (107), the piston body (100) is provided with an oil storage chamber (108), the bottom of the oil storage chamber (108) is provided with multiple sets of oil delivery channels (109), and the outer wall of the piston body (100) is provided with a one-way oil replenishment hole (110).
2. A piston with an oil reservoir as described in claim 1, characterized in that: The piston body (100) has a first oil storage groove (103) and a second oil storage groove (104) on its outer wall, with the first oil storage groove (103) located at the top of the second oil storage groove (104).
3. A piston with an oil reservoir as described in claim 2, characterized in that: The bottom of the first oil storage tank (103) is connected to multiple sets of oil collection holes (107), and the piston body (100) is provided with an oil storage cavity (108), and the bottom of multiple sets of oil collection holes (107) is connected to the oil storage cavity (108).
4. A piston with an oil reservoir as described in claim 3, characterized in that: The piston body (100) has multiple sets of oil channels (109) inside. The top of each set of oil channels (109) is connected to the oil storage chamber (108), and the bottom of each set of oil channels (109) is connected to the oil seepage groove (105).
5. A piston with an oil reservoir as described in claim 1, characterized in that: The oil seepage groove (105) is fitted with the oil seepage ring (106), and the outer wall of the oil seepage ring (106) is evenly provided with multiple sets of oil seepage holes (111).
6. A piston with an oil reservoir as described in claim 1, characterized in that: The piston body (100) has a pin hole (112) at the bottom, a piston pin (113) passes through the pin hole (112), and retaining rings (114) are engaged at both ends of the pin hole (112).
7. A piston with an oil reservoir as described in claim 6, characterized in that: The piston body (100) has a connecting groove (115) at the bottom, the connecting rod (102) is installed in the connecting groove (115), and the piston pin (113) passes through the top of the connecting rod (102).
8. A piston with an oil reservoir as described in claim 1, characterized in that: The piston body (100) is fitted with the sealing ring (101) on its top.