CN202545757U - Light-weighted speed reducer assembly - Google Patents

Abstract

The utility model discloses a light-weighted speed reducer assembly, wherein stairs for arranging bearings are cast directly on a speed reducer shell; the bearings are assembled on the speed reducer shell directly; a driving bevel gear is assembled inside bearing holes directly; the installing plane of the speed reducer shell has no planes for arranging through holes for installing guide bearings; holes for installing a first bearing and a second bearing of different specifications are formed at two ends of a differential inside the speed reducer shell; and an oil inlet groove and an oil outlet groove are cast on the speed reducer shell. The speed reducer provided by the utility model is light in weight, low in cost and high in installation precision and meshing precision of the driving bevel gear, a space for designing the driving bevel gear is saved, a space basis for designing a tooth surface of the gear is provided, and ultimately the design concept of high power density of the speed reducer is realized; as the differential adopts bearings of different sizes at left and right, the support strength is realized, and the cost is reduced effectively at the same time.

Description

A kind of light-duty speed reducer assembly

Technical field

The utility model relates to field of automobile, is that a kind of light-duty vehicle bridge is used speed reducer assembly specifically.

Background technique

Bevel housing is one of kernel component in the axle assembly, and its structure and intensity directly have influence on the performance and the working life of whole retarder.Common retarder, bigger to the spatial requirement of retarder, quality is also bigger; The bearing lubrication of speed reducer assembly main cone is not enough, occurs easily burning to death damage of the bearing such as peeling off; The identical meeting of differential bearing specification makes one of them bearing life higher and cause cost higher.

As shown in Figure 1, be the existing position of reducer shell in speed reducer assembly, and the component that are connected with reducer shell: sequence number 1 is a reducer shell; Sequence number 2 is drive bevel gear; Sequence number 3 is by dynamic bevel gear, and sequence number 4, sequence number 5 are respectively to support the fore bearing and the rear bearing of drive bevel gear 2, and sequence number 6 is to support the guide bearing of drive bevel gear 2; Sequence number 7 is to support the bearing support of drive bevel gear front and back bearings; Bearing support 7 is connected on the reducer shell 1 through bolt 9, and sequence number 8 is differential mechanisms, and main support is by dynamic bevel gear 3; Be furnished with the position number 10 that guide bearing 6 is installed in the reducer shell 1; Need arrange the position of the bolt 9 of installation shaft bearing simultaneously; Width sequence number 11 to gear teeth face has certain limitation; Spatial requirement to retarder is bigger, and the identical differential bearing of specification can make one of them bearing life higher and cause cost higher, is suitable for the bigger structure of heavy vehicle bridge self Dimensions.And the retarder of Light-duty Vehicle requires that the overall dimensions specification is little, cost is low, light weight, the high support, and existing retarder can not meet the demands.

Summary of the invention

For overcome existing light-duty vehicle bridge quality big, occupy that the space is big, cost is high and defective such as lack of lubrication; The goal of the invention of the utility model is to provide a kind of light-duty speed reducer assembly; Nut through reducing bearing support connects, and increases the power density of active and passive gear, adopts different differential bearings; To increase the supporting degree of main cone bearing to drive bevel gear; Make that retarder overall dimensions specification is less, lighter weight, power density be bigger, increases the lubricated of drive bevel gear through big or small wheel location casting in subtracting shell into and out of oil groove.

For realizing above-mentioned purpose; The utility model is directly cast front step and the backward step that fore bearing and rear bearing are installed on reducer shell; Have the fore bearing hole and the rear bearing hole that are used to assemble fore bearing and rear bearing in the reducer shell; Fore bearing and rear bearing directly are assemblied on the reducer shell, and drive bevel gear directly is assemblied in the hole of fore bearing and rear bearing; The attachment face of reducer shell does not have the plane of the through hole that guide bearing is installed; In the reducer shell, the two ends of differential mechanism have the hole of the bearing one with the bearing two that are used to install different size; On reducer shell, be cast with oil-feed tank and go out oil groove.

The utility model compared with prior art has the following advantages:

1, because the drive bevel gear bearing is directly installed on the reducer shell, make the retarder quality lighter, cost is lower; The installation precision of drive bevel gear is guaranteed, thereby guarantees the accuracy of mesh of drive bevel gear.

2, owing to adopt, make main cone lubricated more abundant into and out of oil groove.

3, owing to do not adopt guide bearing to support drive bevel gear, be that design main, driven gear saves the space,, finally realize the design concept of the high power density of retarder for the flank of tooth design of gear provides space basis.

4, the bearing that varies in size about the differential mechanism employing when realizing support strength, can effectively reduce cost.

Description of drawings

Fig. 1 is the structure diagram of existing speed reducer assembly;

Fig. 2 is the structure diagram of the utility model.

Embodiment

As shown in Figure 2; The utility model on reducer shell 1 directly casting the front step 14 and backward step 15 of fore bearing 4 and rear bearing 5 are installed, cast out and be used for the lubricated oil-feed tank 19 of drive bevel gear 2 and go out oil groove 20, have the fore bearing hole 16 and rear bearing hole 17 that are used to assemble fore bearing 4 and rear bearing 5 in the reducer shell 1; Fore bearing 4 directly is assemblied on the reducer shell 1 with rear bearing 5; Drive bevel gear 2 directly is assemblied in the hole of fore bearing 4 and rear bearing 5, do not had being connected of bearing support and reducer shell 1 in the speed reducer assembly, increased the design space of master, the driven gear flank of tooth; Improved the installation precision of drive bevel gear 2; Reduce the outside dimensions of speed reducer assembly, reduced quality, reduced cost; The utility model is the mounting point of shaping-orientation bearing not; The attachment face of reducer shell 1 does not have the plane 18 of the through hole that guide bearing is installed; Do not use guide bearing, do not had guide bearing, can be drive bevel gear 2 and saved the design space by the design of dynamic bevel gear 3; The wide flank of tooth 11 can reach more than 17% of pitch circle, can increase power density; In the reducer shell 1, the two ends of differential mechanism 8 have and are used to install the bearing 1 of different size and the hole of bearing 2 13, and the differential bearing 1 and the bearing 2 13 that vary in size can provide enough supports, and reduce cost.

Claims (2)

1. light-duty speed reducer assembly; It is characterized in that: go up front step (14) and the backward step (15) that fore bearing (4) and rear bearing (5) are installed in directly casting at reducer shell (1); Have the fore bearing hole (16) and rear bearing hole (17) that are used to assemble fore bearing (4) and rear bearing (5) in the reducer shell (1); Fore bearing (4) and rear bearing (5) directly are assemblied on the reducer shell (1), and drive bevel gear (2) directly is assemblied in the hole of fore bearing (4) and rear bearing (5); The attachment face of reducer shell (1) does not have the plane (18) of the through hole that guide bearing is installed; In the reducer shell (1), the two ends of differential mechanism (8) have and are used to install the bearing one (12) of different size and the hole of bearing two (13).

2. a kind of light-duty speed reducer assembly according to claim 1 is characterized in that: on reducer shell (1), be cast with oil-feed tank (19) and go out oil groove (20).

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