阅读说明：本技术 方向机及其壳体 (Steering gear box and housing thereof ) 是由 朱兴旺 万民伟 朱胜峰 虞忠潮 任培 雷浩 于 2021-03-31 设计创作，主要内容包括：本发明公开了方向机及其壳体,涉及动力传动技术领域,包括本体和镶嵌在本体内表面的支撑件,所述本体用于设置在方向机的外周,所述支撑件用于与丝杆螺母总成相抵靠,所述本体的材质为轻金属,所述支撑件的材质为重金属。丝杆螺母总成与输出轴啮合,当输出轴输出扭矩时,输出轴给丝杆螺母总成一个反作用力,使丝杆螺母总成进一步抵靠本体,轻金属材质的本体减轻了方向机壳体的整体重量,支撑件代替本体与丝杆螺母总成相抵靠,重金属材质增加了支撑件的耐磨性能和稳定性,使方向机壳体在不影响其实用性能的前提下,大大减少了自身重量,本实施例的方向机相比普通的电动助力方向机,降重6kg左右,满足用户的需求。(The invention discloses a steering gear and a shell thereof, which relate to the technical field of power transmission and comprise a body and a support member embedded in the inner surface of the body, wherein the body is arranged on the periphery of the steering gear, the support member is used for abutting against a screw rod nut assembly, the body is made of light metal, and the support member is made of heavy metal. Screw-nut assembly and output shaft meshing, when output shaft output torque, the output shaft gives screw-nut assembly reaction force, make the screw-nut assembly further support and lean on the body, the body of light metal material has alleviateed the whole weight of direction casing, support piece replaces the body and offsets with the screw-nut assembly and leans on, the heavy metal material has increased support piece's wear resistance and stability, make the direction casing under the prerequisite that does not influence its practicality, self weight has significantly reduced, the direction machine of this embodiment is than ordinary electronic power-assisted direction machine, about 6kg of falling weight, satisfy user's demand.)

1. The utility model provides a steering gear box shell, its characterized in that includes the body and inlays the support piece at the body internal surface, the body is used for setting up the periphery at the steering gear box, support piece is used for leaning on with the feed screw nut assembly, the material of body is light metal, support piece's material is heavy metal.

2. The steering gear box shell according to claim 1, wherein one side of the support member is embedded in the body, the other side of the support member is flush with or protrudes from the inner surface of the body, and the other side of the support member is provided with a boss which is used for abutting against the screw rod nut assembly.

3. The steering housing of claim 2, wherein the support member and boss are each arcuate.

4. The steering gear box housing of claim 2, wherein the face of the support member embedded in the body has a groove.

5. The steering housing of claim 1, wherein the soft metal is at least one of aluminum, magnesium, and aluminum alloy.

6. The steering gear box housing according to claim 1, wherein the heavy metal is one or more of carbon steel, high chromium cast iron, gray cast iron, and ductile cast iron.

7. The steering gear box housing of claim 1, wherein the body comprises a first cavity for mounting the lead screw nut assembly and the worm gear, one end of the first cavity is a closed end, the other end is an open end, the closed end of the first cavity is for mounting one end of the lead screw nut assembly, and the open end of the first cavity is for mounting the other end of the lead screw nut assembly.

8. The steering gear box shell according to claim 7, wherein the open end of the first cavity is provided with a second cavity, the second cavity is used for installing a worm meshed with a worm wheel, and the second cavity is obliquely arranged on the first cavity towards the closed end.

9. The steering gear box housing of claim 7, wherein a third cavity is vertically disposed below the first cavity for mounting an output shaft engaged with the lead screw nut assembly.

10. A steering gear box, characterized by, including the steering gear box of any claim 1-9, and lead screw nut assembly, worm wheel, worm meshed with worm wheel, output shaft set up in the body, the said lead screw nut assembly includes the threaded spindle and rack nut set up on the threaded spindle, one side of the said rack nut is meshed with output shaft, the other side of the rack nut is leaned against the support member.

Technical Field

The invention relates to the technical field of molds, in particular to a steering gear box and a shell thereof.

Background

In order to solve the pollution problem of internal combustion engine powered automobiles, people develop electric automobiles, along with the increasing development of society, people put forward higher and higher requirements on the oil consumption of the automobile in hundred kilometers, the fuel automobile type can obtain lower oil consumption through weight reduction, and the electric automobiles can also obtain higher endurance mileage through weight reduction of the electric automobiles, so that the weight reduction of the whole automobile is an important measure for reducing the oil consumption of the automobile in hundred kilometers. In order to ensure the performance of the shell of the automobile steering gear, the shell is made of cast iron materials, so that the weight of the shell accounts for about 60-70% of the total weight of the steering gear, and although the shell has stability, the weight of the shell is large, and the requirement of a user for using the automobile cannot be met.

Disclosure of Invention

1. Technical problem to be solved by the invention

Aiming at the technical problem of larger weight of a cast iron shell, the invention provides a steering gear box and a shell thereof, which greatly reduce the self weight of the steering gear box on the premise of not influencing the practical performance of the steering gear box and meet the requirements of users.

2. Technical scheme

In order to solve the problems, the technical scheme provided by the invention is as follows: the utility model provides a steering gear box body, includes the body and inlays the support piece at the body internal surface, the body is used for setting up the periphery at the steering gear box, support piece is used for leaning on with the feed screw nut assembly, the material of body is light metal, support piece's material is heavy metal.

Optionally, one side of the support member is embedded in the body, the other side of the support member is flush with the inner surface of the body or protrudes out of the inner surface of the body, a boss is arranged on the other side of the support member, and the boss is used for abutting against the screw rod nut assembly.

Optionally, the support member and the boss are both arc-shaped.

Optionally, one surface of the support member embedded in the body is provided with a groove.

Optionally, the soft metal is at least one of aluminum, magnesium and aluminum alloy.

Optionally, the heavy metal is one or more of carbon steel, high-chromium cast iron, gray cast iron and nodular cast iron.

Optionally, the body includes a first cavity for mounting the screw-nut assembly and the worm wheel, one end of the first cavity is a closed end, the other end is an open end, the closed end of the first cavity is used for mounting one end of the screw-nut assembly, and the open end of the first cavity is used for mounting the other end of the screw-nut assembly.

Optionally, a second cavity is arranged at the open end of the first cavity, the second cavity is used for installing a worm meshed with a worm wheel, and the second cavity is obliquely arranged on the first cavity towards the closed end.

Optionally, a third cavity is vertically arranged below the first cavity, and the third cavity is used for installing an output shaft engaged with the screw-nut assembly.

The invention also discloses a steering gear, which comprises the steering gear shell, and a screw rod nut assembly, a worm wheel, a worm meshed with the worm wheel and an output shaft which are arranged in the steering gear shell, wherein the screw rod nut assembly comprises a screw rod and a rack nut sleeved on the screw rod, one side of the rack nut is meshed with the output shaft, and the other side of the rack nut abuts against a supporting piece.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) the embodiment of the application provides a direction machine and casing thereof, screw-nut assembly and output shaft meshing, when output shaft output moment of torsion, the output shaft gives screw-nut assembly reaction force, make the screw-nut assembly further support and lean on the body, the body of light metal material has alleviateed the whole weight of direction machine casing, support piece replaces the body and offsets with the screw-nut assembly and leans on, heavy metal material has increased support piece's wear resistance and stability, make the direction machine casing under the prerequisite that does not influence its practicality, self weight has significantly reduced, the direction machine of this embodiment is than ordinary electronic helping hand direction machine, about 6kg of falling weight, satisfy user's demand.

(2) According to the steering gear and the shell thereof, the boss is arranged on the other side of the supporting piece in a protruding mode, the boss abuts against the screw rod nut assembly, the screw rod nut assembly is prevented from being in contact with the body, all reaction forces borne by the screw rod nut assembly are enabled to be applied to the boss, and the body is prevented from being stressed and deformed.

(3) The embodiment of the application provides a steering gear and casing thereof, recess have increased the area of contact between support piece and the body, make the connection between support piece and the body inseparabler, and the recess also plays spacing effect simultaneously, makes support piece more firm inlay this internal, prevents to take place to loosen and take off.

Drawings

Fig. 1 is a schematic structural diagram of a steering gear box housing according to an embodiment of the present invention;

FIG. 2 is a top view of a support for a steering gear housing according to an embodiment of the present invention;

FIG. 3 is a bottom view of a support member of a steering gear box housing according to an embodiment of the present invention;

fig. 4 is a schematic view of a steering gear according to an embodiment of the present invention.

Detailed Description

For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The terms first, second, and the like in the present invention are provided for convenience of describing the technical solution of the present invention, and have no specific limiting effect, but are all generic terms, and do not limit the technical solution of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, and the technical solutions are within the scope of the present invention.

Example 1

With reference to fig. 1-4, the steering gear box shell of this embodiment includes body 1 and inlays support piece 2 at body 1 internal surface, body 1 is used for setting up the periphery at the steering gear box, support piece 2 is used for leaning on with screw-nut assembly 3, the material of body 1 is light metal, support piece 2's material is heavy metal. Screw-nut assembly 3 and the meshing of output shaft 6, when output shaft 6 output torque, output shaft 6 gives 3 reaction forces of screw-nut assembly, make screw-nut assembly 3 further support and lean on body 1, the whole weight of the direction casing has been alleviateed to body 1 of light metal material, support piece 2 replaces body 1 to support with screw-nut assembly 3 and leans on, heavy metal material has increased support piece 2's wear resistance and stability, make the direction casing under the prerequisite that does not influence its practicality, self weight has significantly reduced, the direction machine of this embodiment is than ordinary electronic helping hand direction machine, reduce about 6kg, satisfy user's demand.

Example 2

With reference to fig. 1-4, the steering gear box housing of the present embodiment can be improved as follows compared with the solution of embodiment 1: 2 one sides of support piece are inlayed inside body 1, and 2 another sides of support piece are parallel and level with 1 internal surface of body or protrusion in 1 internal surface of body, and 2 another sides of support piece have boss 21, boss 21 is used for leaning on with feed screw nut assembly 3 counterbalance. In this embodiment, the other surface of the support member 2 is flush with the inner surface of the body 1, so that the tightness between the support member 2 and the body 1 is increased, and the boss 21 is protruded from the other surface of the support member 2, so that the boss 21 abuts against the screw-nut assembly 3, thereby ensuring that the screw-nut assembly 3 does not contact with the body 1, and the reaction force applied to the screw-nut assembly 3 is completely applied to the boss 21, thereby preventing the body 1 from deforming under stress. In other embodiments, the other side of the supporting member 2 may protrude from the inner surface of the body 1, which may further prevent the lead screw nut assembly 3 from contacting the body 1.

Example 3

With reference to fig. 1-4, the steering gear box housing of the present embodiment can be improved as follows compared with the solution of embodiment 1 or 2: the support 2 and the boss 21 are both arc-shaped. The arc design makes support piece 2 and pipy body 1 phase-match, makes boss 21 and pipy feed screw nut assembly 3 phase-match, makes support piece 2 and body 1, boss 21 and feed screw nut assembly 3 between be connected inseparabler.

Example 4

With reference to fig. 1-4, the steering gear box housing of the present embodiment can be modified as follows compared with any of embodiments 1-3: the surface of the support 2 embedded in the body 1 is provided with a groove 22. Recess 22 has increased the area of contact between support piece 2 and the body 1, makes the connection between support piece 2 and the body 1 inseparabler, and recess 22 also plays spacing effect simultaneously, makes support piece 2 more firm inlay in the body 1, prevents to take place the pine and takes off.

Example 5

With reference to fig. 1-4, the steering gear box housing of the present embodiment can be modified as follows compared with any of embodiments 1-4: the soft metal is at least one of aluminum, magnesium and aluminum alloy. The soft metal in this embodiment is the aluminum alloy, and the quality of aluminum alloy is lighter and intensity is higher, satisfies the casing to the demand of weight and intensity.

Example 6

With reference to fig. 1-4, the steering gear box housing of the present embodiment can be modified as follows compared with any of embodiments 1-5: the heavy metal is one or more of carbon steel, high-chromium cast iron, gray cast iron and nodular cast iron. The heavy metal in this embodiment is nodular cast iron, and nodular cast iron has higher intensity, wearability and anti mechanical shock performance, satisfies support piece 2's demand.

Example 7

With reference to fig. 1-4, the steering gear box housing of the present embodiment can be modified as follows compared with any of embodiments 1-6: the body 1 comprises a first cavity 11 for mounting the screw-nut assembly 3 and the worm wheel 4, one end of the first cavity 11 is a closed end 111, the other end is an open end 112, the closed end 111 of the first cavity 11 is used for mounting one end of the screw-nut assembly 3, and the open end 112 of the first cavity 11 is used for mounting the other end of the screw-nut assembly 3. The first chamber serves to protect the feed screw nut assembly 3 and the worm wheel 4.

Example 8

With reference to fig. 1-4, the steering gear box housing of the present embodiment can be modified as follows compared with any of embodiments 1-7: the open end 112 of the first cavity 11 is provided with a second cavity 12, the second cavity 12 is used for installing a worm 5 meshed with the worm wheel 4, and the second cavity 12 is obliquely arranged on the first cavity 11 towards the closed end 111. The worm 5 is meshed with a worm wheel 4 sleeved on the screw rod, and the worm wheel 4 and the screw rod nut assembly 3 are arranged in the same cavity, and the second cavity 12 is obliquely arranged on the first cavity 11 towards the direction of the closed end 111, so that the overall structure of the shell is reduced, and the occupied space is saved.

Example 9

With reference to fig. 1-4, the steering gear box housing of the present embodiment can be modified as follows compared with any of embodiments 1-8: and a third cavity 13 is vertically arranged below the first cavity 11, and the third cavity 13 is used for mounting an output shaft 6 meshed with the screw-nut assembly 3. The third chamber serves to protect the output shaft 6.

Example 10

With reference to fig. 1-4, the steering gear of this embodiment includes the steering gear housing of any one of the technical solutions of embodiments 1-9, and a screw nut assembly 3, a worm wheel 4, a worm 5 engaged with the worm wheel 4, and an output shaft 6 disposed inside the housing, where the screw nut assembly 3 includes a screw 31 and a rack nut 32 sleeved on the screw 31, one side of the rack nut 32 is engaged with the output shaft 6, and the other side of the rack nut 32 abuts against the support member 2. Rack nut 32 and the meshing of output shaft 6, when output shaft 6 output torque, output shaft 6 gives rack nut 32 a reaction force, make rack nut 32 further support and lean on body 1, the body 1 of light metal material has alleviateed the whole weight of direction casing, support piece 2 replaces body 1 and supports with rack nut 32 and lean on, the heavy metal material has increased support piece 2's wear resistance and stability, make the direction casing under the prerequisite that does not influence its practicality, self weight has significantly reduced, the direction machine of this embodiment is than ordinary hydraulic pressure direction machine, 2 ~ 3 kilograms of falling weight, satisfy user's demand.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.