Light driving rear axle of scooter

Abstract

The utility model belongs to the technical field of driving rear axles, and particularly relates to a light driving rear axle of a scooter. A light driving rear axle of a scooter comprises an axle housing, a driver, a differential mechanism and two half shafts arranged on the left side and the right side, the differential mechanism is located in the axle housing, the driver is located outside the axle housing and is in transmission connection with the differential mechanism, one ends of the two half shafts are inserted into the axle housing from outside to inside and are in linkage with the differential mechanism, and the other ends of the two half shafts are in transmission connection with the differential mechanism. One end of each half shaft is connected with the axle housing, the other end of each half shaft is exposed out of the axle housing, each half shaft is provided with a cavity penetrating in the axial direction of the half shaft, a plug is arranged in each cavity, and the plugs are used for isolating the two ends of each cavity. The driving rear axle has the advantages that the weight of the driving rear axle is lighter, so that the weight of the whole scooter can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of drive rear axles, and particularly relates to a light drive rear axle for a scooter. Background Art

[0002] Chinese Patent with the application number 201721655678.9 discloses a rear axle for an elderly scooter. The scooter includes an axle, bearings, a reduction gearbox, a two-shaft assembly and a differential installed in the reduction gearbox, and a rear axle tube. The housing of the reduction gearbox of the scooter is made of aluminum shell material. The overall weight of the drive rear axle with an aluminum shell is relatively heavy, making the overall weight of the scooter larger, resulting in more power consumption, shorter cruising range, and longer braking distance when the scooter is in use. Content of the Utility Model

[0003] The purpose of the utility model is to provide a light drive rear axle for a scooter with a lighter weight.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A light drive rear axle for a scooter includes a bridge housing, a driver, a differential, and two half shafts arranged on the left and right. The differential is located inside the bridge housing, the driver is located outside the bridge housing and is in transmission connection with the differential. One end of each of the two half shafts is inserted into the bridge housing from the outside to the inside and is linked with the differential. The other end of each of the two half shafts protrudes outside the bridge housing. Each of the two half shafts is provided with a cavity penetrating along its axial direction, and a plug is arranged in the cavity for isolating both ends of the cavity.

[0005] In this scheme, the bridge housing is made of magnesium alloy or carbon fiber material to reduce the weight of the drive rear axle of the whole scooter. At the same time, the half shafts are provided with sealed cavities, which can reduce the weight of the two half shafts, thereby reducing the weight of the drive rear axle of the whole scooter. Meanwhile, a plug is arranged in the cavity to isolate both ends of the cavity, so that water outside the bridge housing cannot enter the differential through the cavity.

[0006] Among them, one end of the cavity is sealed. It can be that the half shaft is a blind hole to form a cavity sealed at one end, or the cavity is a hole axially penetrating the half shaft, and a plug is arranged at one end.

[0007] Preferably, the bridge housing is made of carbon fiber or magnesium alloy material.

[0008] Making the bridge housing of carbon fiber or magnesium alloy material can further reduce the overall weight of the drive rear axle.

[0009] Preferably, an internally threaded hole axially opening outwards is arranged at one end of the half shaft deviating from the differential. The internally threaded hole is communicated with the cavity, and the internally threaded hole is equipped with a locking part for fixing the wheel hub of the scooter.

[0010] Since the half shaft itself has an axially extending cavity, it is more convenient to machine the internal threaded holes on the inner wall of the cavity; at the same time, the diameter of the internal threaded holes can be smaller than or similar to the diameter of the cavity, so the wall thickness of the half shaft will not be reduced, and the strength of the half shaft can be ensured. If an external threaded structure is machined on the outer wall of the half shaft in order to reduce the weight, the wall thickness of the half shaft will be relatively thin, resulting in poor strength of the half shaft.

[0011] Preferably, the wall thickness of the half shaft at the internal threaded holes is similar to the wall thickness of the cavity of the half shaft.

[0012] The wall thickness of the half shaft at the internal threaded holes is similar to the wall thickness of the cavity of the half shaft, making the strength of the entire half shaft more uniform at each location.

[0013] Preferably, the plug is located at one end of the half shaft close to the differential.

[0014] The plug is usually pressed into the cavity of the half shaft, and there is an internal threaded hole at one end of the half shaft deviating from the differential. Therefore, it is more preferable to arrange the plug at one end of the half shaft close to the differential.

[0015] Preferably, a stepped structure is provided in the cavity at one end of the half shaft close to the differential, and the stepped structure limits the axial position of the plug.

[0016] After the plug is pressed tightly, it will contact the stepped structure, thereby positioning the axial position of the plug.

[0017] The utility model has the advantages that the weight of the driving rear axle is lighter, so that the weight of the whole scooter can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the utility model.

[0019] Figure 2 For Figure 1 The enlarged view at A of.

[0020] Figure 3 For Figure 1 The enlarged view at B of.

[0021] Figure 4 It is a side view of the utility model.

[0022] Reference numerals in the drawings: 1, driver; 2, differential; 3, bevel gear; 4, half shaft; 41, flat keyway; 5, cavity; 6, internal threaded hole; 7, stepped structure; 8, plug; 9, axle housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described below with reference to the drawings and specific embodiments.

[0024] like Figures 1 to 4 As shown, this embodiment discloses a light-duty drive rear axle of a scooter, including a bridge housing 9, a driver 1, a differential 2, and two half shafts 4 arranged on the left and right. The bridge housing 9 is made of carbon fiber or magnesium alloy material, the differential 2 is located in the bridge housing 9, and the driver 1 is located on the outside of the bridge housing 9 and is drivingly connected to the differential 2 in the bridge housing 9. One end of the two half shafts 4 is inserted into the bridge housing 9 from the outside to the inside and is linked with the bevel gear 3 of the differential 2, and the other end of the two half shafts 4 is exposed on the outside of the bridge housing 9. Among them, the driver 1 is any existing motor, and the driver 1 drives the differential 2 to operate. The differential 2 includes two bevel gears 3, each bevel gear 3 is connected to a half shaft 4, and one end of the outer side of the half shaft 4 is used to connect with the wheel hub of the scooter. The half shaft 4 is provided with a cavity 5 that penetrates the half shaft 4 itself along its own axial direction.

[0025] like Figure 2 As shown, an internal threaded hole 6 is provided at one end of the half shaft 4 that deviates from the bevel gear 3. The internal threaded hole 6 is connected to the cavity 5, and the apertures of the two are similar, so that the wall thickness of the half shaft 4 at the internal threaded hole 6 is similar to the wall thickness of the half shaft 4 at the cavity 5. The internal threaded hole 6 is matched with a locking piece (not shown in the figure), and the locking piece is any existing bolt that can be used to install and fix the wheel hub of the scooter. A flat keyway 41 for connecting with the wheel hub is also provided on the outer wall of the end of the half shaft 4 that deviates from the bevel gear 3.

[0026] like Figure 3 As shown, a plug 8 is provided in the cavity 5 at one end of the half shaft 4 close to the bevel gear 3, so that the half shaft 4 isolates the two ends of the cavity 5. The aperture of the cavity 5 at one end close to the bevel gear 3 includes a large diameter section and a small diameter section, and a step structure 7 is formed between the large diameter section and the small diameter section. The plug 8 is interference-fitted in the large diameter section, and the plug 8 contacts the step structure 7 to limit its axial position.

Claims

1. A light-duty drive rear axle for a scooter, comprising a bridge housing, a driver, a differential, and two half-axles arranged on the left and right, wherein the differential is located in the bridge housing, the driver is located outside the bridge housing and is drivingly connected to the differential, one end of each of the two half-axles is inserted from the outside to the inside into the bridge housing and is linked to the differential, and the other ends of each of the two half-axles are exposed outside the bridge housing, characterized in that: The two half shafts are each provided with a cavity penetrating along their own axial direction, and a plug is provided in the cavity, and the plug is used to isolate the two ends of the cavity.

2. The light-duty driving rear axle of a scooter according to claim 1, characterized in that: The bridge housing is made of carbon fiber or magnesium alloy material.

3. The light-duty driving rear axle of a scooter according to claim 1, characterized in that: An end of the half-shaft deviating from the differential is provided with an internal threaded hole opening axially outward, the internal threaded hole is communicated with the cavity, and the internal threaded hole is equipped with a locking piece, and the locking piece is used to fix the wheel hub of the scooter.

4. The light-duty driving rear axle of a scooter according to claim 3, characterized in that: The wall thickness of the internal threaded hole of the half shaft is similar to the wall thickness of the cavity of the half shaft.

5. The light-duty driving rear axle of a scooter according to claim 3, characterized in that: The plug is located at one end of the half shaft close to the differential.

6. The light-duty driving rear axle of a scooter according to any one of claims 1 to 5, characterized in that: A step structure is provided in the cavity at one end of the half shaft close to the differential, and the step structure limits the axial position of the plug.

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