A device for blocking oil in a gearbox oil pan

Abstract

The utility model discloses a kind of oil plug devices for gearbox oil sump, it is related to gearbox technical field, including bottom shell, the inside of bottom shell is provided with oil drain, the device is rotated by hexagon wrench drive oil plug, it can make boss rotate along slope and one end plane, while oblique clamping block rotates along slope block bottom slope, when boss moves to extrusion block position, it is extruded to cause connecting rib elastic deformation by its extrusion, oil plug continues to rotate and makes boss smoothly clamped into card slot, then connecting rib resets rapidly, this process does not need oil plug excessive radial deviation, form stable and reliable mechanical locking structure, effectively limit the axial displacement and circumferential rotation of oil plug, significantly improve the installation firmness and sealing performance of oil plug in gearbox oil sump oil drain, avoid the problem of loosening and oil leakage due to installation, vibration and oil temperature change, reduce assembly difficulty and production cost, with good practicality and economy.

Description

Technical Field

[0001] This utility model belongs to the field of gearbox technology, and specifically relates to an oil plug device for a gearbox oil pan. Background Technology

[0002] The transmission oil pan, commonly known as the "oil pan," is a disc-shaped or basin-shaped container installed at the bottom of the transmission. It stores transmission fluid and ensures that the oil pump can always draw enough fluid for lubrication and hydraulic transmission.

[0003] Traditional transmission oil pan plug devices typically increase the clearance between the plug and the drain port to allow sufficient radial movement of the plug, enabling it to deflect during rotation for interference fit. However, this deflection can easily cause the seal to be squeezed out of the increased gap during installation, operation, or changes in oil temperature, leading to oil leakage. To solve this problem, we provide an oil plug device for transmission oil pans. Utility Model Content

[0004] The purpose of this invention is to provide an oil plug device for a transmission oil pan, in order to solve the problems mentioned above. Traditional transmission oil pan plug devices typically increase the fit clearance between the oil plug and the drain port to allow the oil plug sufficient radial movement space and cause it to deflect during rotation to achieve an interference fit. However, this deflection can easily cause the sealing ring to be squeezed out from the increased gap during installation, or due to operating vibration and changes in oil temperature, thus causing oil leakage.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an oil plug device for a transmission oil pan, comprising a bottom shell, an oil drain port being provided inside the bottom shell, an oil plug being provided inside the oil drain port, two inclined blocks being fixed inside the oil drain port, an inclined locking block adapted to the inclined blocks being fixed on the surface of the oil plug, a sealing ring being sleeved on the surface of the oil plug, protrusions being integrally machined on both sides of the oil plug, and arc-shaped grooves being provided on both sides of the top of the oil plug, with connecting ribs formed at the connection points between the two ends of the protrusions and the oil plug.

[0006] Preferably, the inside of the oil drain port is provided with a slope, and the inside of the oil drain port is integrally machined with an extrusion block.

[0007] Preferably, the inside of the oil drain port is provided with a slot.

[0008] Preferably, the surface of the oil plug is provided with an annular groove that matches the sealing ring, and the top of the oil plug is provided with a hexagonal groove.

[0009] This utility model has the following beneficial effects: This device uses a hexagonal wrench to drive the oil plug to rotate, causing the protrusion to rotate along the ramp and the plane at one end. Simultaneously, the inclined locking block rotates along the slope at the bottom of the ramp. When the protrusion moves to the position of the pressing block, the pressing action causes the connecting rib to undergo elastic deformation. The oil plug continues to rotate, allowing the protrusion to smoothly engage in the slot. Subsequently, the connecting rib quickly resets. This process does not require excessive radial offset of the oil plug, forming a stable and reliable mechanical locking structure. This effectively limits the axial displacement and circumferential rotation of the oil plug, significantly improving the installation firmness and sealing performance of the oil plug in the drain port of the transmission oil pan. It avoids loosening and oil leakage problems caused by installation, vibration, and oil temperature changes, reduces assembly difficulty and production costs, and has good practicality and economy. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a partial three-dimensional structural view of the present invention; Figure 3 This is a utility model Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a partial three-dimensional structural view of the present invention; Figure 5 This is an exploded view of a partial structure of this utility model.

[0011] Reference numerals: 1. Bottom shell; 2. Oil drain port; 3. Oil plug; 4. Sloping block; 5. Sloping locking block; 6. Sealing ring; 7. Arc groove; 8. Protrusion; 9. Connecting rib; 10. Sloping; 11. Extrusion block; 12. Locking groove; 13. Annular groove; 14. Hexagonal groove. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings.

[0013] Example 1:

[0014] refer to Figure 1-5 An oil plug device for a transmission oil pan includes a bottom shell 1, an oil drain port 2 inside the bottom shell 1, an oil plug 3 inside the oil drain port 2, two ramp blocks 4 fixed inside the oil drain port 2, an inclined locking block 5 adapted to the ramp blocks 4 fixed on the surface of the oil plug 3, a sealing ring 6 sleeved on the surface of the oil plug 3, protrusions 8 integrally machined on both sides of the oil plug 3, and arc grooves 7 opened on both sides of the top of the oil plug 3.

[0015] Specifically, the device drives the oil plug 3 to rotate via a hexagonal wrench, causing the protrusion 8 to rotate along the ramp 10 and the plane at one end. Simultaneously, the inclined locking block 5 rotates along the bottom slope of the ramp block 4. When the protrusion 8 moves to the position of the pressing block 11, the connecting rib 9 undergoes elastic deformation due to its pressing action. The oil plug 3 continues to rotate, allowing the protrusion 8 to smoothly engage in the slot 12. Subsequently, the connecting rib 9 quickly resets. This process does not require excessive radial offset of the oil plug 3, forming a stable and reliable mechanical locking structure. This effectively restricts the axial displacement and circumferential rotation of the oil plug 3, significantly improving the installation firmness and sealing performance of the oil plug 3 in the oil drain port 2 of the gearbox oil pan. It avoids loosening and oil leakage problems caused by installation, vibration, and oil temperature changes, reduces assembly difficulty and production costs, and has good practicality and economy.

[0016] refer to Figure 3 The inside of the oil drain port 2 is provided with a ramp 10, and the inside of the oil drain port 2 is integrally machined with an extrusion block 11. By setting the ramp 10, the guiding function can be realized.

[0017] refer to Figure 3 The oil drain port 2 has a slot 12 inside, which can facilitate the positioning of the protrusion 8.

[0018] refer to Figure 5 The surface of the oil plug 3 is provided with an annular groove 13 that is compatible with the sealing ring 6, and the top of the oil plug 3 is provided with a hexagonal groove 14. By providing the hexagonal groove 14, the oil plug 3 can be rotated by a hexagonal wrench.

[0019] Brief description of the usage process: The user inserts the oil plug 3 into the oil drain port 2. Through the cooperation of the hexagonal groove 14 and the hexagonal wrench, the oil plug 3 is rotated, causing the protrusion 8 to rotate along the slope 10 and the plane at one end. At the same time, the inclined locking block 5 rotates along the slope at the bottom of the slope block 4. When the protrusion 8 moves to the position of the pressing block 11, the protrusion 8 is squeezed by the pressing block 11, causing the connecting rib 9 to undergo elastic deformation. The oil plug 3 continues to rotate, causing the protrusion 8 to be locked into the groove 12. The connecting rib 9 resets, which can limit the oil plug 3, thereby improving the sealing performance of the device.

[0020] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A transmission oil pan plug device, comprising a bottom shell (1), characterized in that: The bottom shell (1) has an oil drain port (2) inside, and an oil plug (3) is provided inside the oil drain port (2). Two inclined blocks (4) are fixed inside the oil drain port (2). An inclined locking block (5) that matches the inclined block (4) is fixed on the surface of the oil plug (3). A sealing ring (6) is fitted on the surface of the oil plug (3). A protrusion (8) is integrally machined on both sides of the oil plug (3). An arc groove (7) is provided on both sides of the top of the oil plug (3). A connecting rib (9) is formed at the connection between the two ends of the protrusion (8) and the oil plug (3).

2. The oil plug device for a transmission oil pan according to claim 1, characterized in that: The oil outlet (2) has a ramp (10) inside, and an extrusion block (11) is integrally machined inside the oil outlet (2).

3. The oil plug device for a transmission oil pan according to claim 1, characterized in that: The oil drain port (2) has a slot (12) inside.

4. The oil plug device for a transmission oil pan according to claim 1, characterized in that: The surface of the oil plug (3) is provided with an annular groove (13) that is compatible with the sealing ring (6), and the top of the oil plug (3) is provided with a hexagonal groove (14).

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