WO2023010966A1 - 用于转向机的螺母部件和转向机 - Google Patents

用于转向机的螺母部件和转向机 Download PDF

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Publication number
WO2023010966A1
WO2023010966A1 PCT/CN2022/095505 CN2022095505W WO2023010966A1 WO 2023010966 A1 WO2023010966 A1 WO 2023010966A1 CN 2022095505 W CN2022095505 W CN 2022095505W WO 2023010966 A1 WO2023010966 A1 WO 2023010966A1
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Prior art keywords
circumferential surface
nut
housing
internal thread
axial direction
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PCT/CN2022/095505
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English (en)
French (fr)
Inventor
焦增超
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博世汽车转向系统（济南）有限公司
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Publication of WO2023010966A1 publication Critical patent/WO2023010966A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D3/00—Steering gears
    • B62D3/02—Steering gears mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members

Definitions

  • the present application relates to the field of steering gear structures. More specifically, the present application relates to a nut component for a steering gear, which aims to provide an improved ball circulation solution. The present application also relates to a steering gear comprising the above-mentioned nut part.
  • Nut parts are often provided in existing hydraulic steering gears so as to cooperate with the worm to form a ball circulation system.
  • a typical nut assembly includes multiple working surfaces, eg at least two working surfaces containing hydraulic oil, and a chamber for containing the tubes of the ball circulation system.
  • the multiple pressure receiving surfaces of the existing nut parts used in the steering gear need to be processed separately.
  • the hydraulic steering gear is affected by the pressure of the working fluid of the hydraulic system during operation, and therefore, the nut part needs to have a mating surface with the housing during operation, the mating surface usually extends on the surface of the nut part, and requires It has a relatively small surface roughness to ensure the matching accuracy of the mating surface.
  • a nut part for a steering gear comprising:
  • a housing comprising a separating part and two fitting parts, the fitting parts are respectively positioned at first and second ends of the housing opposite in the axial direction, and the separating part is located between the two fitting parts in the axial direction , each matching portion has a circumferential surface and a non-circumferential surface at the same axial position, and the circumferential surface has a matching radius, wherein the radius of the separating portion and the radius of the non-circumferential surface are both smaller than the matching radius;
  • a through hole which extends through the housing in the axial direction, is provided with an internal thread in the through hole, and the internal thread extends along a helical line extending around the axial direction.
  • the matching portion includes at least one circumferential surface configured to extend along at least a part of the cylindrical contour; the matching portion also includes at least one non-circumferential surface configured to be opposite to the circumferential surface
  • the cylindrical profile is concave.
  • the circumferential surface is positioned to: start from the first end and/or the second end and extend along at least a part of the outer surface of the housing; the non-circumferential surface is positioned to extend from the first end to the second end. Two ends.
  • the separating portion includes at least one intermediate surface positioned at a portion other than the circumferential surface and the non-circumferential surface on the outer surface of the housing.
  • the surface roughness of the peripheral surface is smaller than the surface roughness of the non-circumferential surface and the intermediate surface.
  • the non-circumferential surface is configured to have one of the following shapes: planar, convex relative to the plane and not protruding beyond the cylindrical profile, concave relative to the plane, or a combination thereof.
  • a first mounting portion and a second mounting portion which are respectively provided between the two ends of the internal thread and the first end and the second end; and a channel, which is provided in the housing and positioned to connect the first mounting portion and the second end; Second installation department.
  • the through hole further includes:
  • the inner diameters of the first light hole portion and the second light hole portion are configured to be greater than or equal to the major diameter of the internal thread.
  • One or more teeth are provided on the outer surface of the housing and are located at the axial middle of the housing.
  • a steering gear comprising:
  • the nut member as described above is movably mounted within the cavity, wherein the circumferential surface is positioned adjacent the inner wall and the non-circumferential surface is positioned spaced apart from the inner wall.
  • Figure 1 is a perspective view of one embodiment of the nut component of the present application.
  • Fig. 2 is another perspective view of the embodiment shown in Fig. 1 .
  • Fig. 3 is another perspective view of the embodiment shown in Fig. 1 .
  • FIG. 4 is a cross-sectional view of the embodiment shown in FIG. 1 .
  • orientation terms such as top, bottom, upward, and downward mentioned herein are defined relative to the directions in the respective drawings. These orientations are relative concepts, and thus will vary according to the location and state in which they are located. Accordingly, these or other directional terms should not be construed as limiting.
  • FIG. 1 is a perspective view of one embodiment of a nut component of the present application
  • FIG. 2 is another perspective view of the embodiment shown in FIG. 1
  • a nut part 100 for a steering gear has a housing 110 extending generally in an axial direction A.
  • the housing 110 extends along the axial direction A from the first end 111 to the second end 112 .
  • the through hole 120 extends through the housing 110 in the axial direction A and is connected from the first end 111 to the second end 112 .
  • the nut member 100 may be configured to be generally cylindrical, and thus, at least a portion of the housing 110 defines a cylindrical profile.
  • the outer surface of the housing 110 includes a separation portion and two mating portions.
  • the respective mating portions are respectively positioned close to the first end 111 and the second end 112 of the nut member 100 .
  • the separation part may be located in the axial direction A between the two mating parts.
  • Each fitting portion has a circumferential surface and a non-circumferential surface at the same axial position.
  • the radii of the separation portion and the non-circumferential surface are set to be smaller than the radius of the circumferential surface.
  • the radius of the circumferential surface is also called the fit radius.
  • the non-circumferential surface may be configured to be separated from the inner wall of the steering gear, not shown, to form a passageway extending from the first end 111 to the second end 112 .
  • a working fluid may communicate between the first end 111 and the second end 112 of the nut member 100 through the passage.
  • the gap is usually sized so that working fluid or lubricating oil cannot flow through the gap in a large amount.
  • the radii of both the separating portion and the non-circumferential surface are configured to be smaller than the radius of the circumferential surface.
  • the radius of the circumferential surface is also called the fit radius.
  • the outer surface of the housing 110 may include at least one circumferential surface 100a, at least one non-circumferential surface 100b, and at least one intermediate surface 100c.
  • the mating portion may include a circumferential surface 100a and a non-circumferential surface 100b
  • the separating portion may include an intermediate surface 100c.
  • the non-peripheral surface 100b and the intermediate surface 100c may have a relatively large surface roughness, and thus do not need to undergo relatively fine processing like the peripheral surface 100a. Such a design is beneficial to reduce the surface processing part, thereby saving cost and processing time.
  • the non-circumferential surface 100b extends along the axial direction A from one end to the other end of the nut member 100 , for example from the first end 111 to the second end 112 .
  • the circumferential surface 100a extends a certain distance from both ends of the nut member 100 to the other end, respectively, and extends at a predetermined angle on the radial cross-section of the nut member 100 .
  • the circumferential surface 100 a occupies at least a part of the cylindrical contour of the nut part 100 as seen from the end face.
  • the intermediate surface 100c is located between the circumferential surfaces 100a at both ends of the nut member 100 .
  • the intermediate surface 100c occupies a part of the outer surface of the casing 110 other than the circumferential surface 100a and the non-circumferential surface 100b.
  • the circumferential surface 100a can extend from the first end 111 and the second end 112
  • the intermediate surface 100c can be disposed between the circumferential surfaces 100a
  • the non-circumferential surface 100b can extend from the first end 111 to the second end 112 .
  • the non-circumferential surface 100b is configured planar. In another embodiment, the non-circumferential surface 100b is configured to be convex relative to a plane and not convex relative to the cylindrical profile of the nut component 100 . In yet another embodiment, the non-circumferential surface 100b is configured to be concave relative to a plane. In another embodiment, the non-circumferential surface 100b may have a combination of the above shapes. In any case, the non-peripheral surface 100b does not protrude beyond the cylindrical contour on which the peripheral surface 100a is located.
  • the nut member 100 may also include one or more teeth 114 disposed on an outer surface of the housing 110 .
  • teeth 114 are provided at the bottom of housing 110 and are configured to mate and mesh with teeth on an output shaft of a steering gear, not shown.
  • the teeth 114 are disposed at the middle of the axial position of the housing 110 .
  • Fig. 3 is another perspective view of the embodiment shown in Fig. 1 .
  • an internal thread 121 is disposed on the inner wall of the housing 110 .
  • the internal thread 121 may be configured to extend along a helix around the axial direction A, and have a substantially semicircular cross section.
  • the internal thread 121 may be combined with a mating internal thread on the worm of a steering gear, not shown, to form a passage for the balls.
  • the internal thread on the worm may also have a substantially semicircular cross-section and thus can be combined with the internal thread 121 to provide a helically extending channel with a circular cross-section.
  • FIG. 4 is a cross-sectional view of the embodiment shown in FIG. 1 .
  • the through hole 120 can be roughly divided into three sections: a first light hole portion 120 a , a second light hole portion 120 b and an internal thread 121 .
  • the first light hole portion 120a is configured to extend from the first end 111 to the inside of the housing 110
  • the second light hole portion 120b is configured to extend from the second end 112 to the inside of the housing 110
  • the internal thread 121 is connected to the first Between the light hole portion 120a and the second light hole portion 120b.
  • the diameters of the first light hole part 120a and the second light hole part 120b may be configured to be larger than the diameter of the internal thread 121, and the diameters of the first light hole part 120a and the second light hole part 120b may be configured to be substantially equal. Therefore, the internal thread 121 protrudes toward the inside of the through hole 120 relative to the first light hole portion 120a and the second light hole portion 120b. In the illustrated embodiment, the internal thread 121 is provided at the internal thread 121 . The generally semicircular cross-section of the internal thread 121 is also shown in FIG. 4 .
  • the inner diameters of the first light hole portion 120 a and the second light hole portion 120 b are greater than or equal to the major diameter of the internal thread 121 .
  • Such a configuration allows easy access to the internal thread 121 . It is easy to understand that the major diameter of the internal thread 121 refers to the diameter of an imaginary cylinder tangent to the root of the internal thread 121 .
  • the internal thread 121 does not extend over the entire length of the through hole 120, but only extends over a part thereof. More specifically, the internal thread 121 extends between the first light hole portion 120a and the second light hole portion 120b.
  • a first mounting portion 131 and a second mounting portion 132 are provided between both ends of the internal thread 121 and the first end 111 and the second end 112 . As shown in FIGS. 1 and 2 , the first installation part 131 and the second installation part 132 are accessible from the outside of the casing 110 . The first mounting portion 131 and the second mounting portion 132 are further deeper into the housing 110 relative to the through hole 120 .
  • a channel 130 is also provided inside the housing 110 , and the channel 130 is positioned to connect the first mounting part 131 and the second mounting part 132 .
  • channel 130 extends generally in axial direction A.
  • the channel 130 has a substantially circular cross-section, and the diameter of the cross-section is substantially equal to the diameter of the semi-circular cross-section of the internal thread 121 .
  • the concave portion 131 a is disposed at a position where the channel 130 engages with the first mounting portion 131 and the second mounting portion 132 .
  • the present application also provides a steering machine comprising an inner wall defining a cavity and a nut member according to the above description.
  • a nut member is movably mounted within the cavity such that the circumferential surface is positioned adjacent the inner wall and the non-circumferential surface is positioned apart from the inner wall.
  • the separation portion is also positioned separate from the inner wall.
  • fixing components for positioning the extending portion inside the first mounting portion 131 and the second mounting portion 132 are also provided, including but not limited to retaining rings and snap rings. Additionally, teeth 114 on the outer surface of housing 110 may mate and engage with teeth on the output rod of the steering gear. In one embodiment, the steering gear is an electric steering gear.
  • the nut part for the steering machine and the steering machine of the present application have the advantages of being simple and reliable, easy to implement, convenient to use, etc., and can provide improved ball circulation function.
  • a recirculating ball mechanism with a greater bearing capacity can be provided, and it is possible to transmit greater force between the nut part and the screw part. Therefore, the performance of the steering gear is further improved.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Transmission Devices (AREA)
  • Power Steering Mechanism (AREA)

Abstract

一种用于转向机的螺母部件和转向机。螺母部件包括：壳体（110），其包括分离部以及两个配合部，配合部分别定位在壳体在轴向方向（A）上相对的第一端（111）和第二端（112）处，分离部在轴向上位于两个配合部之间，每个配合部在相同的轴向位置处具有圆周面（100a）及非周面（100b），圆周面具有配合半径，其中，分离部的半径和非周面的半径均小于配合半径；以及通孔（120），其沿轴向方向延伸穿过壳体，在通孔中设置有内螺纹（121），内螺纹沿着绕轴向方向延伸的螺旋线延伸。该用于转向机的螺母部件和转向机具有简单可靠、易于实施、使用方便等优点，并且能够提供改善的球循环功能。

Description

用于转向机的螺母部件和转向机 技术领域
本申请涉及转向机结构领域。更具体而言，本申请涉及一种用于转向机的螺母部件，其旨在提供改善的球循环解决方案。本申请还涉及一种包括上述螺母部件的转向机。
背景技术
在现有的液压式转向机中常设置有螺母部件，以便与蜗杆协作来形成球循环系统。典型的螺母部件包括多个工作面，例如容纳有液压油的至少两个工作面，以及用于容纳球循环系统的管的室。现有的用于转向机的螺母部件的多个受压面需要分别加工。
液压式转向机在操作过程中受到液压系统的工作流体的压力影响，并且因此，螺母部件在操作过程中需要与壳体之间具有配合面，配合面通常在螺母部件的表面上延伸，并且需要具有相对较小的表面粗糙度，以保证配合面的配合精度。
实用新型内容
本申请一方面的目的在于提供一种用于转向机的螺母部件，其提供简单且可靠的球循环解决方案。本申请另一方面的目的在于提供一种包括上述螺母部件的转向机。
本申请的目的是通过如下技术方案实现的：
一种用于转向机的螺母部件，包括：
壳体，其包括分离部以及两个配合部，配合部分别定位在壳体在轴向方向上相对的第一端和第二端处，分离部在轴向方向上位于两个配合部之间，每个配合部在相同的轴向位置处具有圆周面及非周面，圆周面具有配合半径，其中，分离部的半径和非周面的半径均小于配合半径；以及
通孔，其沿轴向方向延伸穿过壳体，在通孔中设置有内螺纹，内螺纹沿着绕轴向方向延伸的螺旋线延伸。
在上述螺母部件中，可选地，配合部包括至少一个圆周面，圆周面构造为沿圆柱形轮廓的至少一部分延伸；配合部还包括至少一个非周面，非周面构造为相对于圆周面的圆柱形轮廓凹入。
在上述螺母部件中，可选地，圆周面定位为：从第一端和/或第二端出发，沿壳体的外表面的至少一部分延伸；非周面定位为从第一端延伸到第二端。
在上述螺母部件中，可选地，分离部包括至少一个中间面，中间面定位在壳体的外表面上圆周面和非周面之外的部分处。
在上述螺母部件中，可选地，圆周面的表面粗糙度小于非周面和中间面的表面粗糙度。
在上述螺母部件中，可选地，非周面构造为具有以下形状之一：平面的、相对于平面凸起并且并不凸起超过圆柱形轮廓、相对于平面凹入、或它们的组合。
在上述螺母部件中，可选地，还包括：
第一安装部和第二安装部，它们分别设置在内螺纹的两端与第一端和第二端之间；以及通道，其设置在壳体之内，并且定位为连接第一安装部和第二安装部。
在上述螺母部件中，可选地，通孔还包括：
第一光孔部，其从第一端向壳体的内部延伸；以及
第二光孔部，其从第二端向壳体的内部延伸；
其中，第一光孔部和第二光孔部的内径构造为大于或等于内螺纹的大径。
在上述螺母部件中，可选地，还包括：
一个或多个齿，齿设置在壳体的外表面上，并且位于壳体的轴向中部处。
一种转向机，包括：
限定腔的内壁；以及
上述螺母部件，其可移动地装设在腔之内，其中，圆周面定位为邻近内壁，并且非周面定位为与内壁分离。
附图说明
以下将结合附图和优选实施例来对本申请进行进一步详细描述。本领域技术人员将领会的是，这些附图仅是出于解释优选实施例的目的而绘制的，并且因此不应当作为对本申请范围的限制。此外，除非特别指出，附图仅是意在概念性地表示所描述对象的组成或构造，并可能包含夸张性显示。附图也并非一定按比例绘制。
图1是本申请的螺母部件的一个实施例的一个立体视图。
图2是图1所示实施例的另一立体视图。
图3是图1所示实施例的又一立体视图。
图4是图1所示实施例的横截面视图。
具体实施方式
以下将参考附图来详细描述本申请的优选实施例。本领域中的技术人员将领会的是，这些描述仅为描述性的、示例性的，并且不应被解释为限制了本申请的保护范围。
首先，需要说明的是，在本文中所提到的顶部、底部、朝上、朝下等方位用语是相 对于各个附图中的方向来定义的。这些方位是相对的概念，并且因此将根据其所处于的位置和状态而变化。所以，不应将这些或其他方位用语理解为限制性的。
此外，还应当指出的是，对于本文的实施例中描述或隐含的任意单个技术特征或在附图中示出或隐含的任意单个技术特征来说，这些技术特征(或其等同物)能够继续组合，从而获得未在本文中直接提及的其他实施例。
应当注意的是，在不同的附图中，相同的参考标号表示相同或大致相同的部件。
图1是本申请的螺母部件的一个实施例的一个立体视图，并且图2是图1所示实施例的另一立体视图。如图所示，一种用于转向机的螺母部件100具有大致沿轴向方向A延伸的壳体110。具体而言，壳体110沿轴向方向A从第一端111延伸到第二端112。通孔120在轴向方向A上延伸穿过壳体110，并且从第一端111连接到第二端112。在一个实施例中，螺母部件100可构造为大致圆柱形的，并且因此，壳体110的至少一部分限定了圆柱形轮廓。
在一个实施例中，壳体110的外表面包括分离部和两个配合部。各个配合部分别定位为靠近螺母部件100的第一端111和第二端112。分离部可在轴向方向A上位于两个配合部之间。各个配合部在相同的轴向位置处具有圆周面和非周面。在一个实施例中，分离部和非周面的半径设定为小于圆周面的半径。圆周面的半径又称为配合半径。非周面可构造为与未示出的转向机的内壁分离，以便形成从第一端111延伸到第二端112的通路。工作流体可通过该通路在螺母部件100的第一端111和第二端112之间连通。
在一个实施例中，圆周面与内壁之间存在微小的间隙，以使得润滑油可以存在于圆周面与内壁之间，并且因此在圆周面的外表面形成油膜。然而，间隙的尺寸通常设定为使得工作流体或润滑油无法大量地通过间隙流动。在一个实施例中，分离部和非周面的半径均构造为小于圆周面的半径。圆周面的半径又称为配合半径。
具体而言，壳体110的外表面可包括至少一个圆周面100a、至少一个非周面100b和至少一个中间面100c。其中，配合部可包括圆周面100a和非周面100b，并且分离部可包括中间面100c。当螺母部件100装设在转向机的腔之内时，圆周面100a与壳体的内表面相匹配，而非周面100b和中间面100c与壳体的内表面间隔开。因此，圆周面100a可具有相对较小的表面粗糙度，并且可进行相对精细的加工，以确保圆周面100a与壳体的内表面的配合。非周面100b和中间面100c可具有相对较大的表面粗糙度，并且因此无需像圆周面100a那样经历相对精细的加工。这样的设计有利于减少表面加工部分，从而节省成本和加工时间。
在图示的实施例中，非周面100b沿着轴向方向A从螺母部件100的一端延伸到另一端，例如从第一端111延伸到第二端112。圆周面100a从螺母部件100的两端分别向另一端延伸一定距离，并且在螺母部件100的径向横截面上延伸预定角度。从端面上看，圆周面100a至少占据螺母部件100的圆柱形轮廓的一部分。中间面100c位于螺母部件100的两端处的圆周面100a之间。或者说，中间面100c占据壳体110的外表面上除了圆周面100a和非周面100b之外的部分。例如，圆周面100a可从第一端111和第二端112延伸出，中间面100c可设置在圆周面100a之间，并且非周面100b可从第一端111延伸到第二端112。
在一个实施例中，非周面100b构造为平面的。在另一个实施例中，非周面100b构造为相对于平面凸起并且并不相对于螺母部件100的圆柱形轮廓凸起。在又一个实施例中，非周面100b构造为相对于平面凹入。在另一个实施例中，非周面100b可具有上述形状的组合。无论如何，非周面100b不会凸起至超出圆周面100a所位于的圆柱形轮廓。
螺母部件100还可包括一个或多个齿114，齿114设置在壳体110的外表面上。在图示的实施例中，齿114设置在壳体110的底部处，并且构造为与未示出的转向机的输出轴上的齿相匹配并啮合。在一个实施例中，齿114设置在壳体110的轴向位置的中部处。
图3是图1所示实施例的又一立体视图。如图所示，壳体110的内壁上设置有内螺纹121。内螺纹121可构造为沿绕轴向方向A的螺旋线延伸，并且具有大致半圆形的横截面。在一个实施例中，内螺纹121可与未示出的转向机的蜗杆上的相匹配的内螺纹组合来形成用于球的通道。例如，蜗杆上的内螺纹也可具有大致半圆形的横截面，因此能够与内螺纹121结合来提供具有圆形横截面的、沿螺旋线延伸的通道。
图4是图1所示实施例的横截面视图。如图所示，通孔120可大致划分为三个区段：第一光孔部120a、第二光孔部120b和内螺纹121。第一光孔部120a构造为从第一端111向壳体110的内部延伸，第二光孔部120b构造为从第二端112向壳体110的内部延伸，并且内螺纹121连接在第一光孔部120a与第二光孔部120b之间。第一光孔部120a和第二光孔部120b的直径可构造为大于内螺纹121的直径，并且第一光孔部120a和第二光孔部120b的直径可构造为大致相等的。因此，内螺纹121相对于第一光孔部120a和第二光孔部120b向通孔120的内部突起。在图示的实施例中，内螺纹121设置在内螺纹121处。图4中还示出了内螺纹121的大致半圆形的横截面。
在一个实施例中，第一光孔部120a和第二光孔部120b的内径大于或等于内螺纹121的大径。这样的构造使得内螺纹121容易到达。容易理解的是，内螺纹121的大径是指与内螺纹121的牙底相切的假想圆柱的直径。
如图所示，内螺纹121并非在通孔120的整个长度上延伸，而是仅在其一部分上延伸。更具体而言，内螺纹121在第一光孔部120a和第二光孔部120b之间延伸。在内螺纹121的两端与第一端111和第二端112之间设置有第一安装部131和第二安装部132。如图1、2所示，第一安装部131和第二安装部132是可以从壳体110的外部到达的。第一安装部131和第二安装部132相对于通孔120向壳体110进一步深入。
壳体110之内还提供了通道130，并且通道130定位为连接第一安装部131和第二安装部132。在一个实施例中，通道130大致沿轴向方向A延伸。在一个实施例中，通道130具有大致圆形的横截面，并且该横截面的直径与内螺纹121的半圆形横截面的直径是大致相等的。在一个实施例中，凹部131a布置在通道130与第一安装部131和第二安装部132接合的位置处。
本申请还提供一种转向机，其包括限定腔的内壁和根据上文所描述的螺母部件。螺母部件可移动地装设在腔之内，使得圆周面定位为邻近内壁，并且非周面定位为与内壁分离。在一个实施例中，分离部也定位为与内壁分离。在组装好的螺母部件中，内螺纹121与蜗杆上的相匹配的内螺纹组合来形成用于球的通道，并且在内螺纹121的通道的两端与通道130的两端之间分别附接有用于使通道延伸的延伸部。这些延伸部可装设在第一安装部131和第二安装部132之内。在一个实施例中，还提供了将延伸部定位在第一安装部131和第二安装部132之内的固定部件，包括但不限于保持环和卡环等。此外，壳体110的外表面上的齿114可与转向机的输出杆上的齿相匹配并啮合。在一个实施例中，转向机为电动转向机。
本申请的用于转向机的螺母部件和转向机具有简单可靠、易于实施、使用方便等优点，并且能够提供改善的球循环功能。通过采用本申请的螺母部件和转向机，能够提供承载能力更大的循环球机构，并且有可能在螺母部件与螺杆部件之间转递更大的力量。因此，转向机的性能得到进一步的提高。
本说明书参考附图来公开本申请，并且还使本领域中的技术人员能够实施本申请，包括制造和使用任何装置或系统、选用合适的材料以及使用任何结合的方法。本申请的范围由请求保护的技术方案限定，并且包含本领域中的技术人员想到的其他实例。只要此类其他实例包括并非不同于请求保护的技术方案字面语言的结构元件，或此类其他实例包含与请求保护的技术方案的字面语言没有实质性区别的等价结构元件，则此类其他实例应当被认为处于由本申请请求保护的技术方案所确定的保护范围内。

Claims (10)

  1. 一种用于转向机的螺母部件，其特征在于，包括：
    壳体(110)，其包括分离部以及两个配合部，所述配合部分别定位在所述壳体(110)在轴向方向(A)上相对的第一端(111)和第二端(112)处，所述分离部在所述轴向方向(A)上位于两个配合部之间，每个配合部在相同的轴向位置处具有圆周面(100a)及非周面(100b)，所述圆周面(100a)具有配合半径，其中，所述分离部的半径和所述非周面(100b)的半径均小于配合半径；以及
    通孔(120)，其沿所述轴向方向(A)延伸穿过所述壳体(110)，在所述通孔(120)中设置有内螺纹(121)，所述内螺纹(121)沿着绕所述轴向方向(A)延伸的螺旋线延伸。
  2. 根据权利要求1所述的螺母部件，其特征在于，所述配合部包括至少一个圆周面(100a)，所述圆周面(100a)构造为沿圆柱形轮廓的至少一部分延伸；所述配合部还包括至少一个非周面(100b)，所述非周面(100b)构造为相对于所述圆周面(100a)的圆柱形轮廓凹入。
  3. 根据权利要求2所述的螺母部件，其特征在于，所述圆周面(100a)定位为：从所述第一端(111)和/或所述第二端(112)出发，沿所述壳体(110)的外表面的至少一部分延伸；所述非周面(100b)定位为从所述第一端(111)延伸到所述第二端(112)。
  4. 根据权利要求3所述的螺母部件，其特征在于，所述分离部包括至少一个中间部面(100c)，所述中间面(100c)定位在所述壳体(110)的外表面上所述圆周面(100a)和所述非周面(100b)之外的部分处。
  5. 根据权利要求4所述的螺母部件，其特征在于，所述圆周面(100a)的表面粗糙度小于所述非周面(100b)和所述中间面(100c)的表面粗糙度。
  6. 根据权利要求2所述的螺母部件，其特征在于，所述非周面(100b)构造为具有以下形状之一：平面的、相对于平面凸起并且并不凸起超过圆柱形轮廓、相对于平面凹入、或它们的组合。
  7. 根据权利要求1所述的螺母部件，其特征在于，还包括：
    第一安装部(131)和第二安装部(132)，它们分别设置在所述内螺纹(121)的两端与所述第一端(111)和所述第二端(112)之间；以及
    通道(130)，其设置在所述壳体(110)之内，并且定位为连接所述第一安装部(131)和所述第二安装部(132)。
  8. 根据权利要求1所述的螺母部件，其特征在于，所述通孔(120)还包括：
    第一光孔部(120a)，其从所述第一端(111)向所述壳体(110)的内部延伸；以及
    第二光孔部(120b)，其从所述第二端(112)向所述壳体(110)的内部延伸；
    其中，所述第一光孔部(120a)和所述第二光孔部(120b)的内径构造为大于或等于所述内螺纹(121)的大径。
  9. 根据权利要求1-8中任一项所述的螺母部件，其特征在于，还包括：
    一个或多个齿(114)，所述齿(114)设置在所述壳体(110)的外表面上，并且位于所述壳体(110)的轴向中部处。
  10. 一种转向机，其特征在于，包括：
    限定腔的内壁；以及
    根据权利要求1-9中任一项所述的螺母部件，其可移动地装设在所述腔之内，其中，所述圆周面定位为邻近所述内壁，并且所述非周面定位为与所述内壁分离。
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