阅读说明：本技术 一款超静音差速器 (Super-silent differential mechanism ) 是由 程勇玖 于 2021-09-29 设计创作，主要内容包括：一款超静音差速器,属于小型机动车辆后桥驱动装置技术领域,包括配合连接的右箱体与右半轴、左箱体与左半轴,其特征在于：右半轴的内端设置右轴端部齿轮,左半轴的内端设置左轴端部齿轮,右箱体、左箱体之间设置由右齿轮、左齿轮构成的齿轮组,右齿轮与左齿轮反向安装并啮合传动配合,右齿轮与右轴端部齿轮啮合传动配合,左齿轮与左轴端部齿轮啮合传动配合；本技术方案设计新颖、构思合理,本技术方案应用圆柱齿轮啮合差速结构,具有啮合平稳、超低噪音,及结构紧凑、有效利用空间、安装方便、有效防错等效果,同时技术方案中重复使用同一圆柱齿轮,且圆柱齿轮加工工艺成熟,可热处理后进行磨齿加工,确保齿轮高精度,有效降低成本,降低噪音。(The utility model provides an ultra-silent differential mechanism, belongs to small-size motor vehicle rear axle drive technical field, including right box and right semi-axis, left box and the left semi-axis that the cooperation is connected, its characterized in that: the inner end of the right half shaft is provided with a right shaft end part gear, the inner end of the left half shaft is provided with a left shaft end part gear, a gear set formed by a right gear and a left gear is arranged between the right box body and the left box body, the right gear and the left gear are reversely mounted and are in meshing transmission fit, the right gear and the right shaft end part gear are in meshing transmission fit, and the left gear and the left shaft end part gear are in meshing transmission fit; this technical scheme novel in design, design are reasonable, and this technical scheme uses cylindrical gear meshing differential structure, has meshing steady, super low noise, and effects such as compact structure, effectively utilize space, simple to operate, effective mistake proofing, and reuse same cylindrical gear among the technical scheme simultaneously, and cylindrical gear processing technology is ripe, but carries out the gear grinding processing after the heat treatment, ensures gear high accuracy, effective reduce cost, noise reduction.)

1. The utility model provides an ultra-silent differential mechanism, includes right box (2 a) and right semi-axis (1 a), left box (2 b) and left semi-axis (1 b) that the cooperation is connected, its characterized in that: the inner of right side semi-axis (1 a) sets up right axle tip gear (5 a), the inner of left side semi-axis (1 b) sets up left axle tip gear (5 b), set up in the cavity that constitutes between right box (2 a), left box (2 b) by right gear (3 a), the gear train that left gear (3 b) constitute, reverse installation and meshing transmission cooperation between right gear (3 a) and left gear (3 b), right gear (3 a) and right axle tip gear (5 a) meshing transmission cooperation, left gear (3 b) and left axle tip gear (5 b) meshing transmission cooperation.

2. The ultra-silent differential mechanism as claimed in claim 1, wherein the right case (2 a) and the left case (2 b) are fixedly connected and matched by screws (6), through holes (11) and screw holes (8) are respectively arranged on the right case (2 a) and the left case (2 b) at intervals in the circumferential direction, and the screws (6) are screwed and fixed with the screw holes (8) on the other case after penetrating through the through holes (11) on one case.

3. The ultra-silent differential mechanism as claimed in claim 1, wherein the right case (2 a) and the left case (2 b) are respectively provided with a pin hole group (9) consisting of two pin holes, a pin shaft group (4) consisting of two pin shafts is correspondingly and fixedly installed through the pin hole groups (9) on the right case (2 a) and the left case (2 b), and the two pin shafts of the pin shaft group (4) are respectively provided with a right gear (3 a) and a left gear (3 b) which are in running fit with each other.

4. An ultra-silent differential as claimed in claim 1, wherein the right case (2 a) and the left case (2 b) are respectively provided with a shaft hole (10) for passing through the right half shaft (1 a) and the left half shaft (1 b), the right half shaft (1 a) is rotationally matched with the right case (2 a), and the left half shaft (1 b) is rotationally matched with the left case (2 b).

5. The ultra-silent differential gear according to claim 1, wherein one or more gear sets consisting of the right gear (3 a) and the left gear (3 b) are arranged in the cavity between the right case (2 a) and the left case (2 b), the right gear (3 a) and the left gear (3 b) of each gear set are reversely mounted and in meshing transmission fit, the right gear (3 a) and the right shaft end gear (5 a) of each gear set are in meshing transmission fit, and the left gear (3 b) and the left shaft end gear (5 b) are in meshing transmission fit.

6. An ultra-silent differential as claimed in claim 1, wherein the right casing (2 a) is provided with a right cylindrical surface (7 a), the left casing (2 b) is provided with a left cylindrical surface (7 b), and the casing mounting bearings are correspondingly arranged through the right cylindrical surface (7 a) and the left cylindrical surface (7 b).

7. The ultra-silent differential as claimed in claim 1, wherein the right gear (3 a) and the left gear (3 b) adopt the same gear structure, and comprise a section of gear body (301) and a section of optical axis (302) with the outer diameter smaller than the diameter of the root circle, and the gear body (301) and the optical axis (302) are integrated into a whole and are axially provided with a pin shaft through hole (303).

8. An ultra-silent differential as claimed in claim 1, wherein said right and left gears (3 a, 3 b) are designed as identical gear members, and said right and left cases (2 a, 2 b) are designed as identical case members.

9. An ultra-silent differential as claimed in claim 1, wherein the gear parameters of said right and left axle end gears (5 a, 5 b), including but not limited to module, number of teeth, helix angle, etc., remain the same.

10. An ultra-silent differential as claimed in claim 1, wherein the right case (2 a), the left case (2 b), the right half shaft (1 a) and the left half shaft (1 b) are coaxially mounted.

Technical Field

The invention belongs to the technical field of rear axle driving devices of small motor vehicles, and particularly relates to an ultra-silent differential.

Background

At present, small motor vehicles, such as full-automatic cleaning suction machines, sweeper machines, electric vehicles and the like, are partially driven by a rear axle, and the standard matching of the rear axle is two driving wheels; to ensure that the two drive wheels do not slip when the vehicle is turning, a differential mechanism is typically used; the principle is that when the vehicle turns, the two driving wheels have certain speed difference, and the speed of the inner ring wheel is lower than that of the outer ring wheel; according to the running speed and the turning radius of the vehicle, the two driving wheels can automatically form a speed difference matched with the running speed and the turning radius, so that the two wheels are prevented from slipping, and the vehicle is prevented from losing driving force. The prior art is mostly realized by using one group (or multiple groups) of bevel gears, wherein each group of bevel gears is of different structures (or sizes); under the general condition, the processing precision of the bevel gear is much lower than that of a cylindrical gear, the noise is high during meshing, and the meshing stability is poor; and the installation requirement of the bevel gear is higher than that of the cylindrical gear, and the problems of complex assembly process, high manufacturing cost and the like generally exist.

Disclosure of Invention

The invention aims to provide a technical scheme of a cylindrical gear meshing differential transmission ultra-silent differential mechanism so as to overcome the problems in the prior art.

An ultra-silent differential mechanism, including right box and right semi-axis, left box and the left semi-axis that the cooperation is connected, its characterized in that: the inner of right semi-axis sets up right axle tip gear, and the inner of left semi-axis sets up left axle tip gear, sets up the gear train that comprises right gear, left gear in the cavity that constitutes between right box, the left box, and reverse installation and meshing transmission cooperation between right gear and the left gear, right gear and right axle tip gear meshing transmission cooperation, left gear and left axle tip gear meshing transmission cooperation.

The ultra-silent differential mechanism is characterized in that the right box body and the left box body are fixedly connected and matched through screws, through holes and screw holes are respectively formed in the right box body and the left box body at intervals in the circumferential direction, and the screws penetrate through the through holes in one box body and then are fixedly connected with the screw holes in the other box body in a threaded manner.

The ultra-silent differential is characterized in that the right box body and the left box body are respectively provided with a pin hole group consisting of two pin holes, a pin shaft group consisting of two pin shafts is correspondingly and fixedly installed through the pin hole groups on the right box body and the left box body, and the two pin shafts of the pin shaft group are respectively provided with a right gear and a left gear which are in running fit.

The ultra-silent differential is characterized in that shaft holes are respectively arranged on the right box body and the left box body and are correspondingly used for being connected with a right half shaft and a left half shaft in a penetrating mode, the right half shaft is in running fit with the right box body, and the left half shaft is in running fit with the left box body.

The ultra-silent differential is characterized in that one group or more than one group of gear sets consisting of right gears and left gears are arranged in a cavity between the right box body and the left box body, the right gears and the left gears of the gear sets are reversely mounted and in meshing transmission fit, the right gears of the gear sets are in meshing transmission fit with the gears at the end parts of the right shafts, and the left gears are in meshing transmission fit with the gears at the end parts of the left shafts.

The ultra-silent differential is characterized in that a right cylindrical surface is arranged on the right box body, a left cylindrical surface is arranged on the left box body, and box body mounting bearings are correspondingly arranged on the right cylindrical surface and the left cylindrical surface.

A section super-silent differential mechanism, its characterized in that right gear, left gear adopt same gear structure, constitute by one section gear body, one section external diameter is less than the optical axis of root circle diameter, gear body and optical axis axial set up the round pin axle through-hole.

The ultra-silent differential is characterized in that the right gear and the left gear are designed to be the same parts, and the right box body and the left box body are designed to be the same gear parts.

The ultra-silent differential is characterized in that gear parameters of the right shaft end gear and the left shaft end gear, including but not limited to modulus, tooth number, helical angle and the like, are kept the same.

The ultra-silent differential mechanism is characterized in that coaxial line mounting structures are adopted among the right box body, the left box body, the right half shaft and the left half shaft.

The ultra-silent differential mechanism is novel in design and reasonable in concept, the technical scheme adopts the cylindrical gear meshing differential structure, has the effects of being stable in meshing, ultra-low in noise, compact in structure, capable of effectively utilizing space, convenient to install, capable of effectively preventing errors and the like, meanwhile, the technical scheme repeatedly uses the same cylindrical gear, the cylindrical gear is mature in machining process, gear grinding machining can be carried out after heat treatment, high precision of the gear is guaranteed, cost is effectively reduced, and noise is reduced.

Drawings

FIG. 1 is a schematic view of a connection structure according to the present invention;

FIG. 2 is a schematic structural view of the right and left cases;

FIG. 3 is a schematic view of a transmission configuration employing a set of gear sets;

FIG. 4 is a schematic view of a transmission configuration employing two sets of gear sets;

FIG. 5 is a schematic structural view of the gear members employed in the right and left gears;

in the figure: 1 a-right half shaft, 1 b-left half shaft, 2 a-right box, 2 b-left box, 3 a-right gear, 3 b-left gear, 301-gear body, 302-optical axis, 303-pin shaft through hole, 4-pin shaft group, 5 a-right shaft end gear, 5 b-left shaft end gear, 6-screw, 7 a-right cylindrical surface, 7 b-left cylindrical surface, 8-screw hole, 9-pin hole group, 10-shaft hole, 11-through hole, 12-first gear group, 13-second gear group.

Detailed Description

The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, in which:

as shown in the figure, the ultra-silent differential is a type of ultra-silent differential, as shown in fig. 1, fig. 2 and fig. 3, the case body is formed by matching a right case body 2a and a left case body 2b, the right case body 2a and the left case body 2b are designed to have the same structure, namely, the same case body structural member is adopted, the right case body 2a and the left case body 2b are fixedly connected and matched by adopting a screw 6, through holes 11 and screw holes 8 are respectively arranged on the right case body 2a and the left case body 2b at intervals in the circumferential direction, the through holes 11 and the screw holes 8 are uniformly distributed on the same circumference and are equal in number, and during assembly, the screw 6 penetrates through the through hole 11 on one case body and then is fixed with the screw hole 8 on the other case body in a threaded manner; the right box body 2a and the left box body 2b are respectively provided with a shaft hole 10 which is correspondingly used for being connected with a right half shaft 1a and a left half shaft 1b in a penetrating way, the right half shaft 1a is in running fit with the right box body 2a, the left half shaft 1b is in running fit with the left box body 2b, and coaxial line installation structures are adopted among the right box body 2a, the left box body 2b, the right half shaft 1a and the left half shaft 1 b; the inner end of the right half shaft 1a is provided with a right shaft end part gear 5a, the inner end of the left half shaft 1b is provided with a left shaft end part gear 5b, a cavity formed between the right box body 2a and the left box body 2b is internally provided with a gear set formed by the right gear 3a and the left gear 3b, the right gear 3a and the left gear 3b are reversely arranged and are in meshing transmission fit, the right gear 3a and the right shaft end part gear 5a are in meshing transmission fit, the left gear 3b and the left shaft end part gear 5b are in meshing transmission fit, the right box body 2a and the left box body 2b are respectively provided with a pin hole group 9 formed by two pin holes, a pin shaft group 4 formed by two pin shafts is correspondingly and fixedly arranged through the pin hole groups 9 on the right box body 2a and the left box body 2b, the two pin shafts of the pin shaft group 4 are respectively provided with the right gear 3a and the left gear 3b which are in running fit, the right gear 3a and the left gear 3b are designed to adopt the same gear structure, adopt same gear spare promptly, by one section gear body 301, one section external diameter is less than the optical axis 302 of root circle diameter and constitutes, gear body 301 sets up round pin axle through-hole 303 with optical axis 302 axial and is used for passing through the round pin axle, and gear spare adopts the design structure of gear body 301, optical axis 302 combination, and the optical axis 302 that sets up can make differential gear avoid the contact of subtending axle head gear, avoids producing the contact between right gear 3a and left axle tip gear 5b, left gear 3b and the right axle tip gear 5a promptly.

In the above embodiment, the transmission principle is as follows: the right shaft end gear 5a is meshed to rotate along with the right half shaft 1a, the right gear 3a is meshed with the right shaft end gear 5a for transmission, the left gear 3b is meshed with the right gear 3a in the opposite direction for transmission, the left gear 3b is meshed with the left shaft end gear 5b to drive the left half shaft 1b to rotate in the same direction with the left half shaft, a complete transmission chain is formed from the right half shaft 1a to the left half shaft 1b, gear parameters of the right shaft end gear 5a and the left shaft end gear 5b are the same, and the right half shaft 1a and the left half shaft 1b are the same in rotating speed and opposite in rotating direction.

In the above embodiment, one or more gear sets composed of the right gear 3a and the left gear 3b are disposed in the cavity between the right casing 2a and the left casing 2b, that is, the gear sets may be a single set or multiple sets, fig. 4 shows that two gear sets are disposed, that is, the first gear set 12 and the second gear set 13, the right gear 3a and the left gear 3b of each gear set are reversely mounted and engaged in transmission, the right gear 3a and the right shaft end gear 5a are engaged in transmission, the left gear 3b and the left shaft end gear 5b are engaged in transmission, the right casing 2a and the left casing 2b are respectively disposed with two pin hole sets 9, two pin shaft sets 4 are mounted through the two pin hole sets 9, and two gear sets are correspondingly mounted on the two pin shaft sets 4; the cavity between the right box body 2a and the left box body 2b is internally provided with a plurality of groups of gear sets consisting of the right gear 3a and the left gear 3b, so that the transmission stability and the transmission large torque can be further increased, the transmission is more stable and powerful, and the safety is improved.

In the above embodiment, the right cylindrical surface 7a is disposed on the right casing 2a, the left cylindrical surface 7b is disposed on the left casing 2b, and the right casing 2a and the left casing 2b are mounted and fixed by correspondingly disposing the casing mounting bearings on the right cylindrical surface 7a and the left cylindrical surface 7 b.

When the embodiment is applied, the box structure consisting of the right box body 2a and the left box body 2b can be provided with a connecting mechanism for transmitting torque and rotating speed according to the matched rear axle structure. The right half shaft 1a and the left half shaft 1b are coaxially mounted with the right box body 2a and the left box body 2b according to the structure.

In the above embodiment, the intermediate transmission mechanism for realizing the differential speed between the right half shaft 1a and the left half shaft 1b comprises the gear set, the gear set is composed of the right gear 3a and the left gear 3b with the same cylindrical gear structure, and the intermediate transmission mechanism has the technical effects of high gear precision, stable meshing, ultralow noise and the like; the right gear 3a and the left gear 3b belong to the same part which is repeatedly used, so that large-scale processing is realized, and large-scale benefits are reflected; and this technical scheme compact structure, the assembly in-process has a main spare part installation mistake and can not assemble the completion, can neglect the process risk such as dress, wrong tooth, has effects such as effectively utilizing space, simple to operate, effective mistake proofing.