Linear shaft of differential mechanism, planetary gear, differential mechanism and vehicle

Abstract

The utility model relates to a linear shaft of a differential mechanism, a planetary gear, the differential mechanism and a vehicle. The linear shaft of the differential mechanism comprises a shaft body; the oil guide groove is formed in the outer surface of the shaft body, the oil guide groove and the shaft body extend in the same direction, and the oil guide groove extends from one end of the shaft body to the other opposite end of the shaft body. Lubricating oil dripping to the surface of the shaft body enters the oil guide groove, the remaining amount of the lubricating oil is increased, and the lubricating oil flows along the oil guide groove to lubricate the planetary gear arranged on the shaft body in a sleeving mode.

Description

Technical Field

[0001] This disclosure relates to the field of differential technology, specifically to a differential with a slotted shaft, planetary gears, a differential, and a vehicle. Background Technology

[0002] A standard bevel gear differential for automobiles consists of planetary gears, half-shaft gears, a slotted shaft, gaskets, and left and right differential housings. The left and right differential housings are assembled with the slotted shaft to form a planetary carrier. When the car is traveling straight, the planetary gears and half-shaft gears rotate together with the planetary carrier, remaining relatively stationary. When the car turns, the speed difference between the left and right wheels causes the planetary gears to rotate on their own axes while simultaneously rotating with the planetary carrier. This creates a meshing force between the planetary gears and half-shaft gears, transmitting torque. Currently, the lubrication required for the planetary gears to rotate on the slotted shaft is limited, as the rotation of the drive and reducer gears agitates the gear lubricating oil, splashing it onto the axle housing and then dripping it onto the slotted shaft and planetary gears. During prolonged turning, poor lubrication between the planetary gears and the slotted shaft can lead to seizure, scratches, and ultimately, breakage of the slotted shaft, causing differential failure. Utility Model Content

[0003] The purpose of this disclosure is to provide a differential with a slotted shaft, planetary gears, a differential, and a vehicle, which can solve the aforementioned technical problems.

[0004] To achieve the above objectives, this disclosure provides a slotted shaft for a differential, comprising: a shaft body; and an oil guide groove disposed on the outer surface of the shaft body, the oil guide groove extending in the same direction as the shaft body and extending from one end of the shaft body to the opposite end.

[0005] Optionally, multiple oil guide grooves are provided at intervals along the circumference of the shaft.

[0006] The second object of this disclosure is to provide a planetary gear, comprising: a gear body, wherein the gear body has a mounting hole, the gear body is rotatably fitted onto the slotted shaft of the aforementioned differential through the mounting hole, and the mounting hole has an oil reservoir.

[0007] Optionally, the planetary gear further includes a bushing that is interference-fitted with the mounting hole for contact with the shaft, and the oil reservoir is disposed on the bushing.

[0008] Optionally, the oil storage space is distributed circumferentially along the mounting hole to match the oil guide groove.

[0009] Optionally, the oil storage space is constructed as an oil storage hole, the diameter of which is equal to the width of the oil guide groove.

[0010] Optionally, multiple sets of oil storage holes are provided at intervals along the circumference of the mounting hole, and multiple oil guide grooves are provided along the circumference of the shaft. The number of one of the oil storage holes and the oil guide grooves is greater than the number of the other, so that at least one oil guide groove corresponds to the oil storage hole during the relative rotation of the shaft and the gear body.

[0011] Optionally, the number of oil guide grooves is greater than the number of oil storage holes.

[0012] A third object of this disclosure is to provide a differential comprising: the aforementioned differential's slotted shaft and the aforementioned planetary gears, the planetary gears being mounted on the slotted shaft.

[0013] A fourth object of this disclosure is to provide a vehicle comprising: the aforementioned differential.

[0014] Through the above technical solution, the lubricating oil dripping onto the surface of the shaft enters the oil guide groove, increasing the amount of lubricating oil retained. The lubricating oil flows along the oil guide groove to lubricate the planetary gears mounted on the shaft.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the single-axis in this disclosure;

[0018] Figure 2 This is a schematic diagram of the planetary gear structure in this disclosure;

[0019] Figure 3 This is a schematic diagram of the bushing structure in this disclosure;

[0020] Figure 4 This is a cross-sectional view of the central shaft and bushing in this disclosure;

[0021] Figure 5 This is a schematic diagram of the installation of the planetary gear and the slotted shaft in this disclosure.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Shaft; 11. Oil guide groove; 2. Gear body; 21. Mounting hole; 3. Bushing; 4. Oil reservoir. Detailed Implementation

[0024] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0025] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to the inner or outer contours of a component or structure itself. Furthermore, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same elements.

[0026] like Figure 1 As shown, this disclosure provides a differential with a slotted shaft, including: a shaft body 1; and an oil guide groove 11 disposed on the outer surface of the shaft body 1. The oil guide groove 11 extends in the same direction as the shaft body 1 and extends from one end of the shaft body 1 to the opposite end.

[0027] Through the above technical solution, the shaft 1 extends in a straight line, and the lubricating oil dripping onto the surface of the shaft 1 enters the oil guide groove 11, increasing the amount of lubricating oil retained. The lubricating oil flows along the oil guide groove 11 to lubricate the planetary gear sleeved on the shaft 1. The two ends of the shaft 1 are provided with pin holes, which are set outside the range of the oil guide groove 11 to limit the planetary gear and ensure that the planetary gear is installed within the range of the oil guide groove 11.

[0028] Optionally, the oil guide groove 11 is provided with multiple grooves at intervals along the circumference of the shaft 1 to ensure that lubricating oil can be retained at multiple angles, thereby increasing the amount of lubricating oil retained and ensuring that multiple angles of the shaft 1 can be lubricated.

[0029] like Figure 2 and Figure 5 As shown, the second objective of this disclosure is to provide a planetary gear, comprising: a gear body 2, wherein the gear body 2 is provided with a mounting hole 21, the gear body 2 is rotatably fitted onto the slotted shaft of the aforementioned differential through the mounting hole 21, and an oil storage space 4 is provided in the mounting hole 21. Lubricating oil dripping onto the shaft 1 flows along the oil guide groove 11 to the mounting position of the gear body 2, for example, the gear body 2 is installed at both ends of the shaft 1, and enters the oil storage space 4 under the action of centrifugal force, increasing the amount of lubricating oil retained, thereby ensuring the lubrication effect between the planetary gear and the slotted shaft when rotating, and improving the reliability and service life of the slotted shaft.

[0030] Optionally, such as Figure 2-3As shown, the planetary gear also includes a bushing 3, which is interference-fitted with the mounting hole 21 for contact with the shaft 1. An oil reservoir 4 is disposed on the bushing 3. Installing the bushing 3 reduces wear on the gear body 2, increasing its service life, and also facilitates machining, as the oil reservoir 4 can be directly machined into the bushing 3 without machining inside the mounting hole 21, making it suitable for general planetary gears. Of course, in other embodiments, the oil reservoir 4 can also be directly machined into the inner wall of the mounting hole 21.

[0031] As an optional implementation method, such as Figure 2 As shown, the oil storage space 4 is distributed circumferentially along the mounting hole 21 to match the oil guide groove 11, so that when the gear body 2 and the shaft body 1 rotate relative to each other, the oil storage space 4 can match the oil guide groove 11, ensuring that lubricating oil can be retained at multiple angles, and at the same time ensuring that the gear body 2 can be lubricated at multiple angles.

[0032] Optionally, such as Figure 2-4 As shown, the oil storage space 4 is constructed as an oil storage hole. Multiple rows of oil storage holes are arranged circumferentially along the mounting hole 21. Each row has multiple rows arranged axially along the mounting hole 21 to increase the amount of lubricating oil retained. The diameter of the oil storage hole is equal to the width of the oil guide groove 11. The lubricating oil enters the oil storage hole and is retained. When the oil guide groove 11 is aligned with the oil storage hole, the lubricating oil in the oil guide groove 11 enters the oil storage hole under the action of centrifugal force.

[0033] Optionally, such as Figure 4 As shown, multiple sets of oil storage holes are spaced apart along the circumference of the mounting hole 21, and multiple oil guide grooves 11 are provided along the circumference of the shaft 1. The number of oil storage holes and oil guide grooves 11 is greater than the number of the other, so that at least one oil guide groove 11 corresponds to an oil storage hole during the relative rotation of the shaft 1 and the gear body 2. The multiple oil storage holes and oil guide grooves 11 along the circumference can increase the probability of matching between the shaft 1 and the gear body 2 during relative rotation. The fact that the number of one is greater than the number of the other ensures that at least one oil guide groove 11 always corresponds to a set of oil storage holes during rotation. For example, if one has eight and the other has six, it can ensure that there are always two rows of oil guide grooves 11 corresponding to oil storage holes. Of course, in actual applications, since the width of the oil guide grooves 11 is different, the number of oil guide grooves 11 and oil storage holes can be set according to the actual situation. It is only necessary to ensure that there is always one oil guide groove 11 corresponding to a set of oil storage holes at any angle.

[0034] Optionally, such as Figure 4 As shown, the number of oil guide grooves 11 is greater than the number of oil storage holes. Since the lubricating oil drips onto the shaft 1 and then flows to the gear body 2 through the oil guide grooves 11, a larger number of oil guide grooves 11 are provided to retain more lubricating oil dripping onto the shaft 1.

[0035] A third objective of this disclosure is to provide a differential comprising: a slotted shaft of the aforementioned differential and the aforementioned planetary gears, wherein the planetary gears are mounted on the slotted shaft. This differential can increase the amount of lubricating oil retained, thereby improving the lubrication effect between the slotted shaft and the planetary gears and increasing the service life of the differential.

[0036] A fourth object of this disclosure is to provide a vehicle including the aforementioned differential, which can reduce the frequency of vehicle maintenance and increase the service life of the vehicle.

[0037] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0038] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0039] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A single-spindle differential, characterized in that, include: Shaft body; as well as An oil guide groove is provided on the outer surface of the shaft body. The oil guide groove extends in the same direction as the shaft body and extends from one end of the shaft body to the opposite end.

2. The slotted shaft of the differential according to claim 1, characterized in that, The oil guide grooves are provided at intervals along the circumference of the shaft.

3. A planetary gear, characterized in that, include: The gear body has a mounting hole, and the gear body is rotatably fitted onto the slotted shaft of the differential according to claim 1 or 2 through the mounting hole. The mounting hole has an oil storage space.

4. The planetary gear according to claim 3, characterized in that, The planetary gear also includes a bushing, which is interference-fitted with the mounting hole for contact with the shaft, and the oil storage space is disposed on the bushing.

5. The planetary gear according to claim 3 or 4, characterized in that, The oil storage space is distributed circumferentially along the mounting hole to match the oil guide groove.

6. The planetary gear according to claim 5, characterized in that, The oil storage space is constructed as an oil storage hole, and the diameter of the oil storage hole is equal to the width of the oil guide groove.

7. The planetary gear according to claim 6, characterized in that, Multiple sets of oil storage holes are provided at intervals along the circumference of the mounting hole, and multiple oil guide grooves are provided along the circumference of the shaft. The number of one of the oil storage holes and the oil guide grooves is greater than the number of the other, so that at least one oil guide groove corresponds to the oil storage hole during the relative rotation of the shaft and the gear body.

8. The planetary gear according to claim 7, characterized in that, The number of oil guide grooves is greater than the number of oil storage holes.

9. A differential, characterized in that, include: The differential shaft of claim 1 or 2 and the planetary gear of any one of claims 3-8, wherein the planetary gear is sleeved on the differential shaft.

10. A vehicle, characterized in that, include: The differential as described in claim 9.

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