Inter-axle differential assembly for commercial vehicle

Abstract

The utility model relates to an inter-axle differential assembly for a commercial vehicle, which comprises a differential shell, an input shaft is vertically arranged in the middle of the differential shell in a penetrating manner, and the input shaft is of a step-shaped structure; the input shaft is sequentially provided with a first stepped shaft, a second stepped shaft, a third stepped shaft, a fourth stepped shaft, a fifth stepped shaft and a sixth stepped shaft from left to right; the surface of the fourth stepped shaft and the surface of the sixth stepped shaft are coated with polytetrafluoroethylene; the fourth stepped shaft is sleeved with a driving cylindrical gear, the fifth stepped shaft is sleeved with a cross shaft, a floating inter-axle differential case is arranged on the outer side of the cross shaft, and a planetary gear gasket is arranged on the inner side of the floating inter-axle differential case; the sixth stepped shaft is sleeved with a rear half shaft gear. According to the inter-axle differential assembly for the commercial vehicle, a protection device is additionally arranged at the end of the driving bevel gear, so that damage caused by overtorsion is avoided; when the mechanical structure relatively slides, a point-line motion higher pair is formed and is lubricated by gear oil in the speed reducer; the generated heat is low, and the heat dissipation effect is good; and the function stability of parts is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of differential assembly, especially a commercial vehicle axle differential assembly. BACKGROUND

[0002] At present, the drive axle failure mainly focuses on differential assembly wear and abnormal sound.

[0003] The electric vehicle rear axle speed reducer differential assembly disclosed in patent number CN205423737U comprises a driving box body, a speed reduction mechanism and a differential, the speed reduction mechanism and the differential are arranged in the driving box body; the speed reduction mechanism comprises an input shaft and an output shaft, the input shaft is in transmission connection with a driving motor, the output shaft is in transmission connection with the differential, and the differential operates in gear shifting mode; the differential is provided with two output half shafts, and the two output half shafts are fixedly connected with two automobile hubs respectively.

[0004] The differential structure has the problems of large friction coefficient, serious wear, frequent replacement and maintenance, and great trouble in overall use and maintenance. SUMMARY

[0005] The utility model solves the technical problems that: in order to solve the problems in the above background art, a commercial vehicle axle differential assembly is provided, a protection device is added at the end of the driving bevel gear, the damage caused by over-torque can be effectively solved, when the mechanical structure relatively slides, a point-line motion higher pair is formed, and the internal gear oil of the speed reducer is used for lubrication, the heat generation is low, the heat dissipation effect is good, and the stability of the function realization of the parts can be ensured.

[0006] The utility model adopts the technical scheme that: a commercial vehicle axle differential assembly, comprising a differential housing, the input shaft is vertically arranged in the middle of the differential housing, the input shaft is a stepped structure, the first stepped shaft, the second stepped shaft, the third stepped shaft, the fourth stepped shaft, the fifth stepped shaft and the sixth stepped shaft are sequentially arranged on the input shaft from left to right, the surface of the fourth stepped shaft and the surface of the sixth stepped shaft are coated with polytetrafluoroethylene, the driving cylindrical gear is sleeved on the fourth stepped shaft, the cross axle is sleeved on the fifth stepped shaft, the floating axle differential housing is arranged on the outer side of the cross axle, the planetary gear gasket is arranged on the inner side of the floating axle differential housing, and the rear half axle gear is sleeved on the sixth stepped shaft.

[0007] Further limited in the above technical scheme, the inner gear ring is arranged in the middle of the cross axle, and the shaft neck is arranged on the outer wall of the inner gear ring in the circumferential direction.

[0008] Further limited in the above technical scheme, the shaft neck is coated with polytetrafluoroethylene.

[0009] Further, in the above technical solution, the driving cylindrical gear is further provided with a driving cylindrical gear pad on one side.

[0010] Further, in the above technical solution, the planet gear is sleeved on the journal.

[0011] Further, in the above technical solution, the planet gear is meshed and connected with the rear axle gear.

[0012] The beneficial effects of the utility model are: the utility model provides a commercial vehicle axle differential assembly, damage caused by over-torque can be effectively solved by adding a protection device at the driving bevel gear end; when the mechanical structure relatively slides, a point-line motion higher pair is formed, and gear oil inside the speed reducer is used for lubrication; heat generation is low, and the heat dissipation effect is good; the stability of part function implementation can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] Figure 2 It is Figure 1 a structural schematic view of the input shaft in the utility model;

[0016] Figure 3 It is Figure 1 a structural schematic view of the cross axle in the utility model Figure 1 ;

[0017] Figure 4 It is Figure 1 a structural schematic view of the cross axle in the utility model Figure 2 .

[0018] The reference numerals in the drawings are: 1, differential housing, 2, input shaft, 3, first stepped shaft, 4, second stepped shaft, 5, third stepped shaft, 6, fourth stepped shaft, 7, fifth stepped shaft, 8, sixth stepped shaft, 9, polytetrafluoroethylene, 10, driving cylindrical gear, 11, cross axle, 12, floating axle differential housing, 13, planet gear gasket, 14, rear axle gear, 15, inner gear ring, 16, journal, 17, driving cylindrical gear pad, 18, planet gear. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments.

[0020] See Figures 1-4 As shown is a kind of commercial vehicle axle differential assembly, including differential housing 1, input shaft 2 is vertically arranged in the middle of differential housing 1, and input shaft 2 is ladder structure;First ladder shaft 3, second ladder shaft 4, third ladder shaft 5, fourth ladder shaft 6, fifth ladder shaft 7 and sixth ladder shaft 8 are sequentially arranged from left to right on input shaft 2;The surface of fourth ladder shaft 6 and the surface of sixth ladder shaft 8 are coated with polytetrafluoroethylene 9;Driving cylindrical gear 10 is sleeved on fourth ladder shaft 6, and cross shaft 11 is sleeved on fifth ladder shaft 7, and floating axle differential housing 12 is arranged on the outer side of cross shaft 11, and planetary gear gasket 13 is arranged on the inner side of floating axle differential housing 12;Rear axle half gear 14 is sleeved on sixth ladder shaft 8.

[0021] Among them, inner gear ring 15 is arranged in the middle of cross shaft 11, and shaft neck 16 is arranged on the outer wall of inner gear ring 15 along the circumferential direction.Polytetrafluoroethylene 9 is coated on shaft neck 16.Driving cylindrical gear gasket 17 is also arranged on one side of driving cylindrical gear 10.Planetary gear 18 is sleeved on shaft neck 16.Planetary gear 18 is engagedly connected with rear axle half gear 14.

[0022] The commercial vehicle axle differential assembly of the application has the following advantages relative to the conventional differential assembly: input shaft 2 is coated with polytetrafluoroethylene 9 on the surface of fourth ladder shaft 6 and the surface of sixth ladder shaft 8, and the wear-reducing pad is cancelled.Polytetrafluoroethylene 9 is also coated on the shaft neck 16 of cross shaft 11, effectively reducing the relative friction coefficient, reducing the wear of metal parts and the change of lubricating oil performance.

[0023] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. An inter-axle differential assembly for a commercial vehicle, characterized by: The differential housing is vertically provided with an input shaft in the middle, the input shaft is in a stepped structure, the input shaft is sequentially provided with a first stepped shaft, a second stepped shaft, a third stepped shaft, a fourth stepped shaft, a fifth stepped shaft and a sixth stepped shaft from left to right, the surface of the fourth stepped shaft and the surface of the sixth stepped shaft are coated with polytetrafluoroethylene, a driving cylindrical gear is sleeved on the fourth stepped shaft, a cross shaft is sleeved on the fifth stepped shaft, a floating inter-axle differential housing is arranged outside the cross shaft, and a planetary gear gasket is arranged inside the floating inter-axle differential housing, and a rear half shaft gear is sleeved on the sixth stepped shaft.

2. An inter-axle differential assembly for a commercial vehicle according to claim 1, characterized in that: The middle of the cross shaft is provided with an inner gear ring, and the outer wall of the inner gear ring is provided with a shaft neck in the circumferential direction.

3. An inter-axle differential assembly for a commercial vehicle according to claim 2, characterized in that: The shaft neck is coated with polytetrafluoroethylene.

4. The inter-axle differential assembly of claim 1, wherein: One side of the driving cylindrical gear is further provided with a driving cylindrical gear gasket.

5. The inter-axle differential assembly of claim 3, wherein: The shaft neck is sleeved with a planetary gear.

6. An inter-axle differential assembly for a commercial vehicle according to claim 5, characterized in that: The planetary gear is meshed and connected with the rear half shaft gear.

Images