WO2020056732A1 - 扭矩传递件和用于定心装配扭矩传递件的定心工具 - Google Patents

扭矩传递件和用于定心装配扭矩传递件的定心工具 Download PDF

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Publication number
WO2020056732A1
WO2020056732A1 PCT/CN2018/106993 CN2018106993W WO2020056732A1 WO 2020056732 A1 WO2020056732 A1 WO 2020056732A1 CN 2018106993 W CN2018106993 W CN 2018106993W WO 2020056732 A1 WO2020056732 A1 WO 2020056732A1
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WO
WIPO (PCT)
Prior art keywords
centering
torque transmitting
transmitting member
hole
connecting portion
Prior art date
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PCT/CN2018/106993
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English (en)
French (fr)
Inventor
徐晨
Original Assignee
舍弗勒技术股份两合公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 舍弗勒技术股份两合公司 filed Critical 舍弗勒技术股份两合公司
Priority to US17/274,857 priority Critical patent/US20220056958A1/en
Priority to EP18934516.8A priority patent/EP3855044A4/en
Priority to CN201880094109.2A priority patent/CN112262272B/zh
Priority to PCT/CN2018/106993 priority patent/WO2020056732A1/zh
Publication of WO2020056732A1 publication Critical patent/WO2020056732A1/zh

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Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
    • F16D3/06—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0035—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for motor-vehicles
    • B25B27/0064—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for motor-vehicles for assembling or disassembling clutches
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
    • F16D3/78—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members shaped as an elastic disc or flat ring, arranged perpendicular to the axis of the coupling parts, different sets of spots of the disc or ring being attached to each coupling part, e.g. Hardy couplings
    • F16D3/79—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members shaped as an elastic disc or flat ring, arranged perpendicular to the axis of the coupling parts, different sets of spots of the disc or ring being attached to each coupling part, e.g. Hardy couplings the disc or ring being metallic
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/101—Quick-acting couplings in which the parts are connected by simply bringing them together axially without axial retaining means rotating with the coupling
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53909—Means comprising hand manipulatable tool
    • Y10T29/53913—Aligner or center
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/16—Joints and connections with adjunctive protector, broken parts retainer, repair, assembly or disassembly feature
    • Y10T403/1616—Position or guide means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7026—Longitudinally splined or fluted rod
    • Y10T403/7032—Longitudinally splined or fluted rod including a means, e.g., spring biased portion, for misalignment correction

Definitions

  • the present invention relates to a torque transmitting member for transmitting torque between two rotating members.
  • the invention also relates to a centering tool for arranging the torque transmitting member and a fixed centering reference member on the same central axis.
  • a hybrid vehicle refers to a vehicle whose drive system is a combination of two or more single drive systems that can run simultaneously.
  • the power of the vehicle comes from a hybrid powertrain with at least two power units.
  • a hybrid vehicle including a P2 hybrid module is known, in which the motor is located between the engine and the transmission, that is, the P2 position, and the motor is disconnected from the front and rear stages or is connected with anti-torsion through a clutch device.
  • the torque transmitting member has a first connection portion and a second connection portion that are concentrically arranged and fixedly connected to each other.
  • the first connection portion is connected to the driving device as an input end, and the second connection portion is capable of resisting torsion of the transmission input shaft through its center hole connection.
  • the first connection portion of the torque transmitting member can be fixedly connected to a flexible disk known from, for example, CN 103216572B, so that the power generated by the motor in the P2 hybrid module is transmitted to the torque transmitting member through the flexible disk, thereby reducing twisting. Vibration improves driving comfort. Therefore, it is necessary to accurately arrange the flexible disk and the P2 hybrid module on the same central axis.
  • a flexible disk and a torque transmitting member such as a hub
  • the torque transmitting member and the P2 hybrid module are arranged on the same central axis by a centering tool.
  • the housing of the actuator in the P2 hybrid module is set as the centering reference piece of the torque transmitting member.
  • the torque transmission part and the centering reference part are arranged on the same central axis as the existing centering tool through the shape fit, thereby achieving the centering of the torque transmission part.
  • the existing centering tools can only be used for the inner diameter of the center hole of the torque transmitting member larger than the cylindrical The outer diameter of the centering reference piece; otherwise, the centering tool cannot simultaneously achieve the shape fit with the torque transmitting member and the centering reference piece during the centering process.
  • the transmission input shaft needs to be designed smaller, more specifically, the diameter of the transmission input shaft is designed to be smaller.
  • the inner diameter of the center hole is smaller than the outer diameter of the centering reference piece, then the existing centering tools cannot be used, and the torque transmission member and the P2 hybrid power module cannot be accurately arranged on the same centerline. Therefore, in the prior art, there are great restrictions on the design of the input shaft.
  • the technical problem to be solved by the present invention is to provide an improved torque transmitting member and a correspondingly improved centering tool, wherein in the case where the inner diameter of the center hole of the torque transmitting member is smaller than the outer diameter of the centering reference member, The centering tool aligns the torque transmitting member and the fixed cylindrical centering reference member with the center axis.
  • a torque transmitting member for transmitting torque between a first rotating member and a second rotating member, the torque transmitting member having a first connection portion and a second connection portion which are arranged concentrically with each other and are fixedly connected to each other.
  • the connecting portion wherein the first connecting portion is fixedly connected to the first rotating member, the second connecting portion is rotationally connected to the second rotating member, and the second connecting portion has a central hole for receiving the second rotating member.
  • a cylindrical centering reference piece is provided, and the centering reference piece is preferably fixed relative to the housing. During the centering process of the torque transmitting piece, the torque transmitting piece and the centering reference piece are arranged on the same central axis by a centering tool.
  • the centering tool passes through the through holes during the centering process of the torque transmitting member, so that the centering tool can compare the torque transmitting member with the centering reference.
  • Pieces are centered.
  • the first rotating member can be a center-symmetrical member, preferably a return member, and particularly preferably a disk-shaped return member.
  • the second rotating member can be a shaft or a member having a shaft portion.
  • the torque transmitting member is, for example, a member that transmits torque, such as a hub.
  • the first connection portion of the torque transmitting member is a center-symmetrical member, preferably a return member, and particularly preferably a ring-shaped or disc-shaped return member.
  • the second connection portion of the torque transmitting member is a center-symmetrical member having a central hole, preferably a return member having a central hole, and particularly preferably a sleeve.
  • the centering reference piece of the torque transmitting member can be, for example, a cylindrical section of the device housing, the outer peripheral surface of which is used as the centering reference.
  • the centering tool when assembling the torque transmitting member, passes at least partially through at least two through holes provided on the first connecting portion, so that the inner diameter of the center hole of the torque transmitting member is smaller than the outer diameter of the centering reference member.
  • shape matching with the torque transmitting member and the centering reference member is realized at the same time, thereby arranging the torque transmitting member and the centering reference member on the same central axis.
  • the distance between the geometric center of the through hole and the central axis of the torque transmitting member is equal, and the through holes are evenly distributed on the first connecting portion in the circumferential direction. Thereby, the influence of setting the through hole on the local stress of the torque transmitting member is minimized.
  • the size of the through hole needs to be properly designed. On the one hand, the centering tool, especially the centering arm of the centering tool, can be easily passed through. On the other hand, the local strength of the torque transmitting member is too low.
  • the distance from the geometric center of the through hole to the central axis of the torque transmitting member is equal to the outer diameter of the centering reference member.
  • the centering tool has a centering arm. Since the distance from the through hole to the center axis is equal to the outer diameter of the centering reference member, the centering arm After passing straight through the through hole, it can be overlapped on the outer periphery of the centering reference piece.
  • the through hole has a waist shape.
  • the contour of the through-hole is streamlined, and the shape of the through-hole that gradually changes the radius of curvature is beneficial to reducing the degree of stress concentration on the torque transmitting member.
  • a boss is provided on the first connection portion, and a through hole is provided on the boss.
  • the stress concentration coefficient is reduced by local thickening.
  • the axial thickness of the boss is in the range of 7 mm to 21 mm.
  • the axial thickness of the boss is 14 mm.
  • At least two bolt holes are provided on the first connecting portion for bolting with the first rotating member.
  • the bolt holes are evenly distributed on the first connection portion.
  • an inner spline for spline connection with the second rotating member is provided in the central hole of the second connection portion.
  • the centering tool for arranging the torque transmitting member and a fixed cylindrical centering reference member on the same central axis.
  • the centering tool has at least two centering arms, wherein the centering arms can pass through the aforementioned through holes.
  • the number of centering arms can be the same as the number of through holes in the first connection portion.
  • one end of the centering arm is provided with a radial positioning surface matching the centering reference piece, and the other end of the centering arm is fixedly connected to each other indirectly or directly.
  • the radial positioning surface is, for example, an arc surface extending in the circumferential direction.
  • the centering tool is clamped on the outer contour of the centering reference piece through the radial positioning surface of each centering arm, so that the centering tool has no radial movement relative to the centering reference piece.
  • an axial positioning surface can be provided at one end of the centering arm that engages the centering reference member, so that when the first rotating member is assembled to, for example, a hybrid module, the torque transmitting member can be positioned in the axial direction.
  • the centering tool further has a centering cylinder, wherein the outer diameter of the centering cylinder is the same as the inner diameter of the center hole of the second connection portion of the torque transmitting member.
  • the centering arm is fixedly connected to the centering cylinder at one end where the centering reference plane is not provided.
  • the inner diameter of the center hole is equivalent to the diameter of the inner envelope circle of the connection structure.
  • the centering arm can be set radially outside the centering cylinder, and the position of the geometric center of each centering arm with respect to the outer periphery of the centering cylinder corresponds to the inner periphery of the center hole or the inner periphery of the center hole or Position of the inner envelope circle.
  • the centering cylinder can be arranged parallel to the centering arm.
  • the centering cylinder is extended into the center hole of the torque transmitting member, so that the centering tool and the hub are arranged on the same central axis, and the centering arms can pass through the through holes and extend to the centering reference, respectively. So that the centering tool and the centering reference piece are arranged on the same central axis by the radial positioning surface.
  • the peripheral contour of the centering arm can be matched to the shape of the through hole, thereby directly limiting the radial movement between the centering tool and the torque transmitting member.
  • the torque transmitting member and the fixed cylindrical centering reference member are arranged on the same central axis.
  • FIG. 1 is a sectional view of a centering assembly process of a hub and a hybrid module according to a preferred embodiment of the present invention
  • Fig. 2 is a perspective view of a hub according to Fig. 1,
  • FIG. 3 is a front view of the hub according to FIG. 1,
  • Fig. 4 is a side view of the hub according to Fig. 1, and
  • Fig. 5 is a perspective view of a centering tool according to a preferred embodiment of the present invention.
  • the torque transmitting member according to a preferred embodiment of the present invention is designed to be used as a hub 2 in a hybrid vehicle, wherein the hybrid vehicle particularly has a P2 hybrid module and also includes an engine, a transmission, and the like, wherein the hub 2 Especially used to transfer torque between the P2 hybrid module and the transmission.
  • FIG. 1 shows a cross-sectional view of a hub 2 and a P2 hybrid power module during centering assembly.
  • the P2 hybrid module has a rotation axis, and includes components such as a motor, a clutch, an electric central actuator (EZA), and a flange shaft 5.
  • the hub flexible disk 1 is driven by a rotor (not shown) of a motor.
  • the shaft hub 2 is connected to a component transmitting power of the motor rotor through a flexible disk 1 and the shaft hub 2 is connected to a transmission input shaft (not shown) in a torque-proof manner, thereby transmitting the power of the motor through the flexible disk 1 and the shaft hub 2.
  • the flexible disk 1, the hub 2 and the hybrid module are arranged on the same axis of rotation, wherein the flexible disk 1 and the hub 2 are centered, for example, through a center hole of the hub 2, and the concentric arrangement of the hub 2 and the hybrid module is passed according to
  • the centering tool 3 of the embodiment of the present invention is implemented, wherein a cylindrical shoulder 41 on the end of the EZA housing 4 can be selected as the centering reference piece.
  • the hub 2 has a first connection portion 21 and a second connection portion 22 which are arranged concentrically with each other and are fixedly connected to each other.
  • the first connection portion 21 is used for bolt connection with the flexible disk 1.
  • the first connection portion 21 is a circular ring-shaped plate member, and a plurality of bolt holes 26 are evenly provided on the first connection portion 21.
  • the bolt holes 26 allow bolts 6 (visible in FIG. 1) connecting the flexible disc 1 and the hub 2 to pass through.
  • the second connection portion 22 is used for anti-rotation connection with the transmission input shaft.
  • the second connection portion 22 has a center hole for accommodating the transmission input shaft after being centered and assembled, and an inner spline 25 for spline connection with the transmission input shaft is provided on the inner periphery of the center hole.
  • torque is transmitted between the flexible disk 1 and the transmission input shaft through the hub 2.
  • the diameter of the center hole of the second connecting portion 22 (more precisely, the diameter of the inner envelope circle of the inner spline 25 of the hub 2) is smaller than the outer diameter of the cylindrical shoulder 41 as a centering reference piece.
  • a boss 24 extending in the axial direction is provided on the first connecting portion 21 of the shaft hub 2, and the boss 24 has a circular ring shape as a whole.
  • the axial thickness h of the boss 24 is preferably in a range of 7 to 21 mm, and particularly preferably 14 mm.
  • the boss 24 is provided with four through holes 23 through which the centering arm 32 of the centering tool 3 passes.
  • the geometric centers of the four through holes 23 are equal in distance from the central axis of the hub 2, and the four through holes 23 are evenly distributed in the circumferential direction.
  • the four through-holes 23 have a waist-like shape as shown in FIG. 3, that is, their outlines are streamlined, and the circumferential direction of the through-holes is widened in the circumferential direction, respectively.
  • Fig. 5 shows a perspective view of a centering tool 3 according to a preferred embodiment of the present invention.
  • the centering tool 3 includes a centering cylinder 31, four centering arms 32, and a connection structure 33 connecting the centering cylinder 31 and the centering arm 32.
  • the diameter of the centering cylinder 31 is the same as the diameter of the envelope circle of the inner spline 25 of the center hole of the second connecting portion 22, so that when the centering cylinder 31 projects into the center hole, the hub 2 cannot be relatively opposed to the centering tool 3 Generates radial motion.
  • the four centering arms 32 are arranged parallel to the centering cylinder 31 and are all distributed radially outside the centering cylinder 31, and the positions of the centering arms 32 relative to the centering cylinder 31 correspond to the positions of the respective through holes 23.
  • the position of the envelope circle of the inner spline 25 of the center hole is, therefore, the spacing between the four centering arms 32 is equal, and the pitch of the envelope circle of the four centering arms 32 relative to the inner spline 25 is equal.
  • One end of each centering arm 32 has an axial positioning surface 34 and a radial positioning surface 35 for snapping onto the cylindrical shoulder 41.
  • the other end of each centering arm 32 (ie, an end portion without a positioning surface) is connected to the centering cylinder 31 through a connection structure 33.
  • the centering arm 32 can pass through each corresponding through hole 23 and be snapped onto the cylindrical shoulder 41 by means of the axial positioning surface 34 and the radial positioning surface 35, so that the centering tool 3 cannot be opposed to the housing of the electric central execution device
  • the body 4 generates radial movement, thereby achieving a concentric arrangement of the hub 2 and the hybrid module, and defining the position of the centering tool 3 on one side in the axial direction.
  • the flexible disk 1, the hub 2 and the hybrid module according to the preferred embodiment of the present invention can be arranged on the same central axis through the following steps:

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Abstract

一种用于在第一转动件（1）和第二转动件之间传递扭矩的扭矩传递件（2），扭矩传递件（2）具有相互同心布置的且相互固定连接的第一连接部（21）和第二连接部（22），其中，第一连接部（21）与第一转动件（1）固定连接，第二连接部（22）与第二转动件抗扭连接，且第二连接部（22）具有用于容纳第二转动件的中心孔，其中，设置呈圆柱形的定心基准件（41），在装配扭矩传递件（2）的过程中通过定心工具（3）将扭矩传递件（2）与定心基准件（41）同中心轴线地布置，其中，在第一连接部（21）上设置至少两个通孔（23），在定心过程中定心工具（3）穿过通孔（23）。一种定心工具（3），用于将上述扭矩传递件（2）与固定的呈圆柱形的定心基准件（41）同中心轴线地布置，其中，定心工具（3）具有至少两个定心臂（32），其中，定心臂（32）能够穿过上述通孔（23）。

Description

扭矩传递件和用于定心装配扭矩传递件的定心工具 技术领域
本发明涉及一种用于在两个转动件之间传递扭矩的扭矩传递件。本发明还涉及到一种定心工具，用于将该扭矩传递件与固定的定心基准件同中心轴线地布置。
背景技术
混合动力车辆是指车辆驱动系统由两个或多个能同时运转的单个驱动系统联合组成的车辆，车辆的动力来自具有至少两种动力单元的混合动力总成。从CN 104890497A已知包括P2混合动力模块的混合动力车辆，其中，电机位于发动机与变速器之间，即P2位置，并且电机通过离合装置与前后级断开或抗扭转连接。
能够使用例如轴毂的扭矩传递件在P2混合动力模块和变速器之间传递动力。扭矩传递件具有相互同心布置的且相互固定连接的第一连接部和第二连接部，第一连接部作为输入端与驱动装置连接，第二连接部能够通过其中心孔与变速器输入轴抗扭连接。此外，扭矩传递件的第一连接部能够与例如从CN 103216572B已知的挠性盘固定连接，从而P2混合动力模块中的电机产生的动力通过挠性盘传递到扭矩传递件，由此减少扭转振动，提高驾驶舒适性。因此，需要精确地将挠性盘与P2混合动力模块同中心轴线地布置。
在现有技术中，通常先通过公知的方式将挠性盘和例如轴毂的扭矩传递件定心装配，然后通过定心工具将扭矩传递件与P2混合动力模块同中心轴线地布置。通常，设定P2混合动力模块中的执行装置的壳体为扭矩传递件的定心基准件。在装配过程中，通过形状配合使得扭矩传递件和定心基准件相对现有的定心工具同中心轴线布置，从而实现扭矩传递件的定心。
但是，因为执行装置的壳体和扭矩传递件之间的轴向间距有限或者因为其他零部件的位置干扰，现有的定心工具仅能用在扭矩传递件的中心孔的内径大于圆柱形的定心基准件的外径的情况，否则定心工具无法在定心过程中同时实现与扭矩传递件和定心基准件的形状配合。为了节省在变速器中的布置空间或是为了节约制造成本，需要将变速器输入轴设计得较小，更确切地说将变速器输入轴的直径设计得较小，如果扭矩传递件上的与输入轴相应的中心孔的内径小于定心基准件的外径，那么将无法使用现有的定心工具，从而无法精准地将扭矩传递件与P2混合动力模块同中心线布置。因此，在现有技术中，对输入轴的设计有很大的限制。
发明内容
因此，本发明所要解决的技术问题是提供一种改进的扭矩传递件和相应改进的定心工具，其中，在扭矩传递件的中心孔的内径小于定心基准件的外径的情况下，能够通过该定心工具将扭矩传递件和固定的圆柱形的定心基准件同中心轴线地布置。
上述技术问题通过一种用于在第一转动件和第二转动件之间传递扭矩的扭矩传递件解决，所述扭矩传递件具有相互同心布置的且相互固定连接的第一连接部和第二连接部，其中，第一连接部与第一转动件固定连接，第二连接部与第二转动件抗扭连接，且第二连接部具有用于容纳第二转动件的中心孔。设置呈圆柱形的定心基准件，该定心基准件优选相对壳体固定，在扭矩传递件的定心过程中通过定心工具将扭矩传递件与定心基准件同中心轴线地布置。根据本发明，在第一连接部上设置至少两个通孔，在扭矩传递件的定心过程中定心工具穿过所述通孔，从而使得定心工具能够将扭矩传递件与定心基准件定心布置。在本发明的范围内，第一转动件能够是中心对称的部件，优选是回传件，特别优选是整体呈盘形的回传件。第二转动件能够是轴或具有轴部的部件。扭矩传递件例如是轴毂等传递扭矩的部件。扭矩传递件的第一连接部是中心对称的部件，优选是回传件，特别优选是环形或盘形的回传件。扭矩传递件的第二连接部是具有中心孔的中心对称的部件，优选是是具有中心孔的回传件，特别优选是套筒。扭 矩传递件的定心基准件能够是例如装置壳体的呈圆柱形的部段，其外周表面被用作定心基准。根据本发明，在装配扭矩传递件时，定心工具至少部分地穿过在第一连接部上设置的至少两个通孔，从而在扭矩传递件的中心孔的内径小于定心基准件的外径的情况下，同时实现与扭矩传递件和定心基准件的形状配合，由此将扭矩传递件与定心基准件同中心轴线地布置。
在一种优选的实施方式中，通孔的几何中心相对扭矩传递件的中心轴线的距离相等，且将通孔沿周向均匀分布在第一连接部上。从而尽可能减小设置通孔对扭矩传递件的局部应力的影响。此外，需要适当设计通孔的大小，一方面使得定心工具，特别是定心工具的定心臂能够方便地穿过，另一方面避免扭矩传递件局部强度过低。有利地，通孔的几何中心到扭矩传递件的中心轴线的距离等于定心基准件的外径。从而有助于方便地制造相应的用于装配扭矩传递件的定心工具，例如定心工具具有定心臂，由于通孔到中心轴线的距离等于定心基准件的外径，从而定心臂在直线穿过通孔后能够搭接在定心基准件的外周上。
在另一种优选的实施方式中，通孔具有腰形的形状。也就是说，通孔的轮廓呈流线型，通过这种曲率半径逐步变化的通孔轮廓，有利于降低扭矩传递件上应力集中的程度。
在另一种优选的实施方式中，在第一连接部上设置凸台，通孔被设置在凸台上。从而通过局部加厚的方式使得应力集中系数下降。有利地，凸台的轴向厚度在7mm至21mm的范围内。特别有利地，凸台的轴向厚度是14mm。在适当设计通孔的孔型时，设置14mm的凸台轴向厚度能够使得扭矩传递件的通孔处的局部应力基本等于现有扭矩传递件相应位置处的局部应力。
在另一种优选的实施方式中，在第一连接部上设置至少两个用于与第一转动件螺栓连接的螺栓孔。有利地，螺栓孔均匀分布在第一连接部上。
在另一种优选的实施方式中，在第二连接部的中心孔上设置用于与第二转动件花键连接的内花键。
此外，上述技术问题还通过一种定心工具解决，该定心工具用于将上述扭矩传递件与固定的呈圆柱形的定心基准件同中心轴线地布置。根据本 发明，该定心工具具有至少两个定心臂，其中，定心臂能够穿过上述通孔。特别地，定心臂的个数能够与第一连接部上的通孔的个数相同。有利地，定心臂的一端设置有匹配定心基准件的径向定位面，定心臂的另一端相互间接地或直接地固定连接。径向定位面例如是沿周向延伸的弧面。定心工具通过各个定心臂的径向定位面卡接在定心基准件的外周轮廓上，使得定心工具相对定心基准件无径向运动。附加地，还能在定心臂的卡接定心基准件的一端设置轴向定位面，从而能够在将第一转动件装配到例如混合动力模块时，在轴向上定位扭矩传递件。
在一种优选实施方式中，定心工具还具有定心圆柱体，其中，定心圆柱体的外径与扭矩传递件的第二连接部的中心孔的内径相同。定心臂在未设置定心基准面的一端分别与定心圆柱体固定连接。在这种情况下，如果在中心孔内设置有例如内花键等用于与第二转动件抗扭连接的连接结构，那么中心孔的内径相当于连接结构的内包络圆的直径。因此，能够将定心臂设置在定心圆柱体的径向外侧，并且各个定心臂的几何中心相对定心圆柱体外周的位置分别对应于各个通孔的几何中心相对中心孔的内周或者内包络圆的位置。特别地，能够将定心圆柱体与定心臂平行布置。在装配过程中，将定心圆柱体伸入到扭矩传递件的中心孔，使得定心工具与轴毂同中心轴线地布置，并且，定心臂能够分别穿过通孔并且延伸至定心基准件，从而通过径向定位面使得定心工具与定心基准件同中心轴线地布置。
在一种特别的实施方式中，定心臂的外周轮廓能够与通孔的形状相匹配，从而直接限定定心工具与扭矩传递件之间的径向运动。结合定心臂的径向定位面，能够实现扭矩传递件与固定的呈圆柱形的定心基准件同中心轴线地布置。
附图说明
下面结合附图来示意性地阐述本发明的优选实施方式。附图为：
图1是根据本发明优选实施方式的轴毂和混合动力模块的定心装配过程的剖视图，
图2是根据图1的轴毂的立体图，
图3是根据图1的轴毂的正视图，
图4是根据图1的轴毂的侧视图，以及
图5是根据本发明优选实施方式的定心工具的立体图。
在不同的附图中，相同或功能相同的部件使用相同的附图标记。
具体实施方式
根据本发明的优选实施方式的扭矩传递件被设计为用作混合动力车辆中的轴毂2，其中，混合动力车辆特别具有P2混合动力模块，并且还包括发动机、变速器等，其中，轴毂2特别用于在P2混合动力模块和变速器之间传递扭矩。
图1示出轴毂2与P2混合动力模块在定心装配期间的剖视图。如图1所示，P2混合动力模块具有旋转轴线，并且包括电机、离合器、电气式中央执行装置(EZA)、法兰轴5等组成部分。轴毂挠性盘1由电机的转子(未示出)驱动。轴毂2通过挠性盘1与传递电机转子动力的部件连接，并且轴毂2与变速器输入轴(未示出)抗扭连接，由此将电机的动力经挠性盘1、轴毂2传递到变速器输入轴(未示出)。挠性盘1、轴毂2和混合动力模块同旋转轴线地布置，其中，挠性盘1和轴毂2例如通过轴毂2的中心孔定心，并且轴毂2与混合动力模块的同心布置通过根据本发明实施例的定心工具3实现，其中，能够选择在EZA壳体4的端部上的圆柱形凸肩41作为定心基准件。
下面详细讲述根据本发明的优选实施方式的轴毂2和定心工具3。
图2、图3和图4分别示出根据图1的轴毂的立体图、正视图和侧视图。从这三个附图可见，轴毂2具有相互同心布置的且相互固定连接的第一连接部21和第二连接部22。第一连接部21用于与挠性盘1螺栓连接。第一连接部21是圆环形板件，并且在第一连接部21上均匀设置多个螺栓孔26。螺栓孔26供连接挠性盘1和轴毂2的螺栓6(在图1中可见)穿过。第二连接部22用于与变速器输入轴抗扭连接。第二连接部22具有在定心装配后用于容纳变速器输入轴的中心孔，并且在该中心孔内周设置用于与变速器输入轴花键连接的内花键25。由此通过轴毂2在挠性盘1和变 速器输入轴之间传递扭矩。此外，第二连接部22的中心孔的直径(更确切地说，轴毂2的内花键25的内包络圆的直径)小于作为定心基准件的圆柱形凸肩41的外径。
在轴毂2的第一连接部21上设置沿轴向延伸的凸台24，凸台24整体呈圆环形。如图4所示，凸台24的轴向厚度h优选在7～21mm范围内，特别优选为14mm。在凸台24上设置四个供定心工具3的定心臂32穿过的通孔23。四个通孔23的几何中心相对轴毂2的中心轴线的距离相等，并且四个通孔23沿周向均匀分布。四个通孔23如图3所示具有腰形的形状，也就是说其轮廓呈流线型，并且通孔的周向分别沿周向扩宽。
图5示出根据本发明的优选实施方式的定心工具3的立体图。定心工具3具有定心圆柱体31、四个定心臂32以及连接定心圆柱体31和定心臂32的连接结构33。定心圆柱体31的直径与第二连接部22的中心孔的内花键25的包络圆直径相同，从而在定心圆柱体31伸入中心孔时，轴毂2无法相对定心工具3产生径向运动。四个定心臂32与定心圆柱体31平行布置，并且均分布在定心圆柱体31的径向外侧，并且各个定心臂32相对定心圆柱体31的位置对应于各个通孔23相对中心孔的内花键25的包络圆位置，因此，四个定心臂32间距相等，并且四个定心臂32相对内花键25的包络圆的间距相等。各个定心臂32的一端具有用于卡接在圆柱形凸肩41上的轴向定位面34和径向定位面35。各个定心臂32的另一端(即未设置有定位面的端部)与定心圆柱体31通过连接结构33连接。定心臂32能够穿过各个对应的通孔23并借助轴向定位面34和径向定位面35卡接在圆柱形凸肩41上，使得定心工具3无法相对电气式中央执行装置的壳体4产生径向运动，由此实现轴毂2与混合动力模块的同心布置，并且沿轴向单侧地限定定心工具3的位置。
由此，借助根据本发明选实施方式的定心工具3，能够通过以下步骤将挠性盘1、根据本发明优选实施方式的轴毂2和混合动力模块同中心轴线地布置：
1)将挠性盘1和轴毂2通过螺栓连接，
2)将定心工具3安装在轴毂2上，即定心圆柱体31伸入第二连接部 22的中心孔中，并且各个定心臂32分别穿过第一连接部21上的对应的通孔23，
3)将定心工具3的各定心臂32卡接在定心基准件41上，
4)将挠性盘1与传递电机转子的动力的部件连接，
5)撤去定心工具3。
虽然在上述说明中示例性地描述了可能的实施例，但是应该理解到，仍然通过所有已知的和此外技术人员容易想到的技术特征和实施方式的组合存在大量实施例的变化。此外还应该理解到，示例性的实施方式仅仅作为一个例子，这种实施例绝不以任何形式限制本发明的保护范围、应用和构造。通过前述说明更多地是向技术人员提供一种用于转化至少一个示例性实施方式的技术指导，其中，只要不脱离权利要求书的保护范围，便可以进行各种改变，尤其是关于所述部件的功能和结构方面的改变。
附图标记列表
1     第一转动件，挠性盘
2     扭矩传递件，轴毂
21    第一连接部
22    第二连接部
23    通孔
24    凸台
25    内花键
26    螺栓孔
3     定心工具
31    定心圆柱体
32    定心臂
33    连接结构
34    轴向定位面
35    径向定位面
4     电气式中央执行装置的壳体
41    定心基准件，圆柱形凸肩
5     法兰轴
6     螺栓
h     凸台厚度

Claims (10)

  1. 一种用于在第一转动件(1)和第二转动件之间传递扭矩的扭矩传递件(2)，所述扭矩传递件(2)具有相互同心布置的且相互固定连接的第一连接部(21)和第二连接部(22)，其中，所述第一连接部(21)与所述第一转动件(1)固定连接，所述第二连接部(22)与所述第二转动件抗扭连接，且所述第二连接部(22)具有用于容纳所述第二转动件的中心孔，
    其中，设置呈圆柱形的定心基准件(41)，在所述扭矩传递件(2)的定心过程中通过定心工具(3)将所述扭矩传递件(2)与所述定心基准件(41)同中心轴线地布置，其特征在于，在所述第一连接部(21)上设置至少两个通孔(23)，在所述定心过程中所述定心工具(3)穿过所述通孔(23)。
  2. 根据权利要求1所述的扭矩传递件(2)，其特征在于，所述通孔(23)的几何中心相对所述扭矩传递件(2)的中心轴线的距离相等，且将所述通孔(23)沿周向均匀分布在所述第一连接部(21)上。
  3. 根据权利要求2所述的扭矩传递件(2)，其特征在于，所述距离等于所述定心基准件(14)的外径。
  4. 根据权利要求1所述的扭矩传递件(2)，其特征在于，所述通孔(23)具有腰形的形状。
  5. 根据权利要求1所述的扭矩传递件(2)，其特征在于，在所述第一连接部(21)上设置凸台(24)，所述通孔(23)被设置在所述凸台(24)上。
  6. 根据权利要求5所述的扭矩传递件(2)，其特征在于，所述凸台(24)的轴向厚度(h)在7mm至21mm的范围内。
  7. 根据权利要求1所述的扭矩传递件(2)，其特征在于，在所述第一连接部(21)上设置至少两个用于与所述第一转动件(1)螺栓连接的螺栓孔(26)。
  8. 根据权利要求1所述的扭矩传递件(2)，其特征在于，在所述第 二连接部(22)的中心孔上设置用于与所述第二转动件花键连接的内花键(25)。
  9. 一种定心工具(3)，用于将根据权利要求1-8中任一项所述的扭矩传递件(2)与固定的呈圆柱形的定心基准件(41)同中心轴线地布置，其特征在于，所述定心工具(3)具有至少两个定心臂(32)，其中，所述定心臂(32)能够穿过根据权利要求1-8中任一项所述的通孔(23)。
  10. 根据权利要求9所述的定心工具(3)，其特征在于，所述定心工具(3)还具有定心圆柱体(31)，所述定心圆柱体(31)的外径与所述扭矩传递件(2)的第二连接部(22)的中心孔的内径相同。
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CN112262272B (zh) 2022-08-02

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