Differential mechanism

Abstract

The utility model relates to a scooter drive axle, in particular to a differential mechanism for the scooter drive axle. A differential mechanism comprises a first shell and a gear fixedly arranged on the first shell in a sleeving mode, a matching hole used for being matched with a pin shaft is formed in the side wall of the first shell, a mounting groove is formed in the outer wall of the end of the first shell and penetrates through the axial end face of one side of the first shell, the inner end of the mounting groove is communicated with the matching hole, and the inner end of the mounting groove is communicated with the pin shaft. A first matching groove used for being matched with the first check ring is formed in the outer end of the groove wall of the mounting groove, fixing grooves corresponding to each other are further formed between the groove wall of the mounting groove and the inner wall of the gear, linkage blocks are arranged at the fixing grooves, and the fixing grooves are located between the first matching groove and the matching hole. Miniaturization of the differential mechanism is achieved, the problem that the size is increased due to the fact that the thickness of the shell is increased is avoided, and the differential mechanism has the advantages that the space utilization rate is improved, the assembly difficulty is lowered, and the possibility of interference of parts is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a scooter drive axle, concretely relates to a differential for scooter drive axle. BACKGROUND

[0002] As the differential disclosed in Chinese patents with application numbers 202222339133.4, 202420281947.3 etc., the gear (large gear ring) is fixed with the differential housing through bolts, and since the structural strength of the differential housing needs to be ensured, the thickness and radial dimension of the differential housing are increased, which leads to a large overall volume of the differential, but the accommodating cavity of the scooter drive axle for accommodating the differential is limited, which leads to an increase in the volume of the scooter drive axle, or leads to more troublesome assembly of the differential and the occurrence of interference between parts. SUMMARY

[0003] The utility model aims at providing a differential which is convenient to miniaturize, thus facilitating assembly and avoiding interference between internal parts of the scooter drive axle as much as possible.

[0004] To achieve the above-mentioned purpose, the utility model adopts a differential, which comprises a first housing and a gear fixed on the first housing in a sleeved manner, the first housing is formed with an inner cavity for accommodating the differential gear, the first housing sidewall is provided with a matching hole in communication with the inner cavity and used for matching the pin shaft, the first housing end portion outer wall is recessed to form an annular mounting groove used for matching the gear, the mounting groove penetrates through the first housing one side axial end face, the mounting groove inner end is in communication with the matching hole, the mounting groove wall outer end is provided with a first matching groove used for matching the first retainer, the mounting groove wall and the gear inner wall are further provided with mutually corresponding fixing grooves, the fixing grooves are provided with linkage blocks, and the fixing grooves are located between the first matching groove and the matching hole; when the gear is fixed with the first housing, the gear is limited between the mounting groove groove bottom and the first retainer, the gear is linked with the first housing through the linkage blocks, and the pin shaft is located on the gear end portion circumferential inner side.

[0005] The utility model realizes the compression of the gear through the axial location of the retainer, realizes the linkage of the gear and the first housing through the linkage blocks, thus realizing the fixation between the gear and the first housing, without the need of bolts, and thus without the need of increasing the thickness and radial dimension of the first housing due to the thread holes, so that the housing can be made smaller, the overall volume of the differential is smaller, the differential can be installed in the limited scooter drive axle accommodating cavity, and interference between internal parts of the drive axle is avoided as much as possible, thus facilitating the miniaturization of the differential and the drive axle.

[0006] The design of the fixed groove and the linkage block makes the connection between the gear and the first shell more firm, and through the limiting effect of the linkage block, it ensures that the gear and the shell can rotate synchronously in the transmission process, thereby improving the stability and reliability of the transmission. The fixed groove is located between the first matching groove and the matching hole, which reasonably utilizes the space and makes the structure more compact, thereby further reducing the size of the differential.

[0007] Preferably, the fixed groove is in communication with the matching hole.

[0008] The fixed groove is in communication with the matching hole, so that the fixed groove can be longer and can accommodate a longer linkage block, thereby further enhancing the connection strength and stability between the gear and the shell; at the same time, the complexity of the structure is reduced, and the need for additional connecting components or complex machining processes due to the non-communication between the fixed groove and the matching hole is avoided, thereby reducing the production cost.

[0009] Preferably, the opposite sides of the gear inner wall and the opposite sides of the first shell are both provided with the fixed grooves corresponding to each other.

[0010] The symmetrical fixed groove design makes the connection between the gear and the shell more uniform and stable, avoiding deformation or damage of the gear due to uneven stress; the fixed grooves and linkage blocks on both sides work together to further enhance the connection strength between the gear and the shell, thereby improving the stability of the transmission.

[0011] Preferably, the opposite sides of the first shell are respectively provided with a first shaft hole and a mounting hole, the mounting hole is provided with a second shell, the outer end of the mounting hole wall is provided with a second matching groove for matching a second retainer ring, the second shell has a second shaft hole, and the second shell is limited between the mounting hole bottom and the second retainer ring.

[0012] Through the combination of the first shell and the second shell, the modular design of the differential is realized, which is convenient for production, assembly and maintenance; the cooperation of the second retainer ring and the second matching groove can effectively limit the axial position of the second shell, ensuring the stable and reliable connection between the second shell and the first shell. At the same time, the first shell and the second shell do not need to be fixed by bolts, which can make the differential shell smaller and the overall size of the differential smaller.

[0013] Preferably, the inner end of the second shell is provided with a clearance groove for partially accommodating the differential gear. The design of the clearance groove provides more space for the differential gear, avoiding interference between the second shell and the differential gear, and making the structure of the differential more compact.

[0014] Preferably, the extension direction of the fixed groove is perpendicular to the extension direction of the matching hole, the fixed groove is a waist-shaped groove, the cross-sectional shape of the linkage block is the same as the inner edge shape of the fixed groove, and the linkage block is in the shape of a long strip.

[0015] The shape of the fixing groove matches the cross-sectional shape of the linkage block, precise limiting and guiding effects can be achieved, the linkage block is ensured to stably slide in the fixing groove, and the stability and reliability of transmission are improved. The design of the waist-shaped groove enables the fixing groove to have certain flexibility, impact and vibration in the transmission process can be absorbed to a certain extent, and wear of parts is reduced.

[0016] The utility model discloses a small size differential mechanism, avoid the problem of volume increase caused by the increase of shell thickness, reduce the volume of scooter drive axle, have improved the space utilization, reduced the assembly difficulty, the possibility of reducing the interference of spare parts's advantage. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a rotating sectional view of the utility model.

[0018] Figure 2 It is a structure schematic view of the first shell of the utility model.

[0019] Figure 3 It is Figure 2 the rotating sectional view of A-A direction in. DETAILED DESCRIPTION

[0020] The utility model will be further described below according to the drawings and specific embodiment.

[0021] As shown in Figures 1 to 3 , the embodiment discloses a differential mechanism, including first shell 1, second shell 2 and gear 3, gear 3 is fixedly covered in first shell 1, first shell 1 is formed with the inner chamber 10 for accommodating differential gear 4, and the inner chamber both ends of first shell 1 are communicated with first shaft hole 11 and mounting hole 12 respectively, second shell 2 is located in mounting hole 12 and is equipped with second shaft hole 21, and the outer end of mounting hole 12 hole wall is equipped with the second matching groove 17 for cooperating with second check ring 8, and second shell 2 is limited between mounting hole 12 hole bottom and second check ring 8. Among them, the side wall of first shell 1 is equipped with the matching hole 13 communicated with the inner chamber 10 and used for cooperating with pin shaft 5. Among them, the inner end of second shell 2 is equipped with the let go groove for letting part differential gear.

[0022] The outer wall of the end of first shell 1 with mounting hole 12 is concave to form the mounting groove 14 for cooperating with gear 3 and being annular, and the mounting groove 14 penetrates the end face of the end of first shell 1 with mounting hole 12, the inner end of mounting groove 14 is communicated with matching hole 13, and the outer end of groove wall of mounting groove 14 is equipped with the first matching groove 15 for cooperating with first check ring 6;When gear 3 is fixed with first shell 1, gear 3 is limited between mounting groove 14 groove bottom and first check ring 6.

[0023] The gear 3 is linked with the first shell 1 through the linkage block 7, the installation groove 14 is provided with the fixed groove 16 corresponding to the inner wall of the gear 3, the linkage block 7 is arranged at the fixed groove 16, the fixed groove 16 is located between the first matching groove 15 and the matching hole 13, and the pin shaft 5 is located at the end of the gear 3 and the inner side in the circumferential direction. Wherein, the fixed groove 16 is communicated with the matching hole 13 for facilitating machining; the opposite sides of the inner wall of the gear 3 and the opposite sides of the first shell 1 are provided with the fixed groove 16 corresponding to each other for ensuring the stability of linkage. Wherein, the extension direction of the fixed groove 16 is perpendicular to the extension direction of the matching hole 13, the fixed groove 16 is a waist-shaped groove, the cross-sectional shape of the linkage block 7 is the same as the inner edge shape of the fixed groove 16, and the linkage block 7 is in a strip shape.

[0024] The embodiment realizes the miniaturization of the differential, avoids the problem of volume increase caused by the increase of the shell thickness, reduces the volume of the scooter drive axle, has the advantages of improving the internal space utilization rate of the differential and the drive axle, reducing the assembly difficulty of the drive axle, and reducing the possibility of interference of parts.

Claims

1. A differential comprising a first housing and a gear sleeve fixed on the first housing, the first housing is formed with an inner cavity for accommodating a differential gear, a matching hole for matching a pin shaft is arranged on the side wall of the first housing and communicates with the inner cavity, characterized in that: The first housing end outer wall is concave to form an annular mounting groove for matching the gear, the mounting groove penetrates through the one-side axial end face of the first housing, the inner end of the mounting groove is communicated with the matching hole, the outer end of the mounting groove groove wall is provided with a first matching groove for matching the first check ring, the fixing groove is further provided between the mounting groove groove wall and the gear inner wall, the fixing groove is provided with a linkage block, the fixing groove is located between the first matching groove and the matching hole; when the gear is fixed with the first housing, the gear is limited between the mounting groove groove bottom and the first check ring, the gear is linked with the first housing through the linkage block, and the pin shaft is located at the circumferential inner side of the gear end.

2. A differential as claimed in claim 1, characterized in that: The fixing groove is communicated with the matching hole.

3. A differential according to claim 1 or 2, characterised in that: Opposite sides of the gear inner wall and opposite sides of the first housing are both provided with the corresponding fixing groove.

4. A differential as defined in claim 1 wherein: The first housing is respectively provided with a first shaft hole and a mounting hole at opposite sides, the mounting hole is provided with a second housing, the outer end of the mounting hole hole wall is provided with a second matching groove for matching the second check ring, the second housing has a second shaft hole, and the second housing is limited between the mounting hole hole bottom and the second check ring.

5. A differential as defined in claim 4 wherein: The inner end of the second housing is provided with a let-out groove for partially letting out the differential gear.

6. A differential as defined in claim 1 wherein: The extension direction of the fixing groove is perpendicular to the extension direction of the matching hole, the fixing groove is a waist-shaped groove, the cross-sectional shape of the linkage block is the same as the inner edge shape of the fixing groove, and the linkage block is long strip-shaped.

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