CN117507679A - Hollow front axle, disc brake front axle assembly and drum brake front axle assembly - Google Patents

Hollow front axle, disc brake front axle assembly and drum brake front axle assembly Download PDF

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Publication number
CN117507679A
CN117507679A CN202311497372.5A CN202311497372A CN117507679A CN 117507679 A CN117507679 A CN 117507679A CN 202311497372 A CN202311497372 A CN 202311497372A CN 117507679 A CN117507679 A CN 117507679A
Authority
CN
China
Prior art keywords
front axle
assembly
hollowed
cross beam
drum
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202311497372.5A
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Chinese (zh)
Inventor
龚炫
周挺
杨威
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongfeng Dana Axle Co Ltd
Original Assignee
Dongfeng Dana Axle Co Ltd
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 Dongfeng Dana Axle Co Ltd filed Critical Dongfeng Dana Axle Co Ltd
Priority to CN202311497372.5A priority Critical patent/CN117507679A/en
Publication of CN117507679A publication Critical patent/CN117507679A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/02—Dead axles, i.e. not transmitting torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/18—Steering knuckles; King pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/20—Links, e.g. track rods

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The invention relates to a hollowed front axle, which comprises a middle cross beam, wherein both ends of the middle cross beam are sequentially connected with spring seats, bent neck connecting parts and fist heads; the two ends of the hollow front shaft are in axisymmetric structures; the cross sections of the middle cross beam, the plate spring seat and the bent neck connecting part are in an I-shaped structure; two hollowed lightening holes are formed on the middle cross beam and are symmetrically distributed along the symmetry axis of the middle cross beam; the fist portion adopts the design of sharing the interface, can be used to the installation of drum-type front axle or disc-type front axle, this application still provides disc brake front axle assembly and drum brake front axle assembly that has above-mentioned fretwork front axle, this fretwork front axle forms the fretwork lightening hole that two symmetries set up on the middle part crossbeam, both satisfied the bearing strength demand and realized subtracting heavy design again, wherein fist portion is designed to the form of sharing the interface, can satisfy the installation of drum-type front axle and disc-type front axle, both satisfied the lightweight demand, promoted the commonality of technical part again.

Description

Hollow front axle, disc brake front axle assembly and drum brake front axle assembly
Technical Field
The invention relates to the technical field of automobile chassis parts, in particular to a hollowed front axle, a disc brake front axle assembly and a drum brake front axle assembly.
Background
The light weight of commercial vehicles is an industry trend, and an axle is an important assembly of a chassis of the commercial vehicles, and the light weight design and the standardized design of the axle become important technical means for improving the competitiveness of products of enterprises.
Currently, front axle assemblies applied to the market are divided into drum brake front axles and disc brake front axles according to different brake structures, wherein an upper arm of the drum front axle is generally arranged on the front side of a steering knuckle, a tie rod assembly with an offset structure is adopted, and an upper arm of the disc front axle is generally arranged on the right side of the steering knuckle, and a zero-drop tie rod assembly is adopted. Because of the interface structure difference of the drum type front axle and the disc type front axle, the parts share difference; and the weight of the conventional front axle is large, so that the existing front axle assembly product has no light weight advantage.
Disclosure of Invention
Based on the expression, the invention provides a hollowed front axle, which solves the technical problems that the prior art has poor part commonality and the front axle has heavy self weight, so that the front axle assembly product has no light weight trend.
The technical scheme for solving the technical problems is as follows:
the hollowed front axle comprises a middle cross beam, wherein two ends of the middle cross beam are sequentially connected with a spring seat, a bent neck connecting part and a fist part; the two ends of the hollowed front shaft are in axisymmetric structures;
the cross sections of the middle cross beam, the plate spring seat and the bent neck connecting part are of I-shaped structures;
two hollowed lightening holes are formed in the middle cross beam and are symmetrically distributed on the symmetry axis of the middle cross beam;
the fist part adopts a common interface design and can be used for installing a drum type front axle or a disc type front axle.
Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:
the fretwork front axle that this application provided forms the fretwork lightening hole that two symmetries set up on the middle part crossbeam, has both satisfied the bearing strength demand and realized subtracting the heavy design again, and wherein fist head is designed to the joint form, can satisfy the installation of drum-type front axle and disk-type front axle, has both satisfied the lightweight demand, has promoted the commonality of technical part again.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the hollowed-out lightening hole is of an annular runway-shaped structure and is provided with a straight section positioned in the middle and semicircular sections positioned at two ends of the straight section.
Further, the upper and lower width of the cross section of the bent neck connecting part is consistent and the width is defined as a reference width A, and the hollowed front axle satisfies the following relation:
the width B=0.6-0.8A of the lower end of the plate spring seat; the upper end width C=1.8 ~2.4A of plate spring seat, the upper and lower width of middle part crossbeam is D, and D=1.2 ~1.5A.
Further, the thickness of the lower section of the middle cross beam is defined as a reference thickness H, and the hollowed front axle meets the following conditions:
the lower section thickness E=0.8-0.9H of the bent neck connecting part, and the lower section thickness G=1.1-1.3H of the plate spring seat.
The application also provides a disc brake front axle assembly, it includes integrated knuckle, zero offset tie rod assembly, T type upper arm, wheel hub brake disc assembly, disc brake and fretwork front axle as above, integrated knuckle with fist portion forms the revolute pair and is connected, two integrated knuckles that are located both ends are connected at zero offset tie rod assembly's both ends, wheel hub brake disc assembly passes through the bearing support and installs on two integrated knuckles, T type upper arm installs on arbitrary integrated knuckle, in order to drive front axle assembly turns to, two disc brake is fixed respectively on two integrated knuckles.
The application also provides a drum brake front axle assembly, which comprises an integrated knuckle, a zero-offset tie rod assembly, a T-shaped upper arm, a hub brake drum assembly, a drum brake and the hollow front axle; the integrated steering knuckle is connected with the fist part to form a revolute pair, two integrated steering knuckles at two ends are connected at two ends of the zero-offset tie rod assembly, the hub brake drum assembly is installed on the two integrated steering knuckles through bearing support, and the T-shaped upper arm is installed on any one of the integrated steering knuckles so as to drive the front axle assembly to steer, and the two drum brakes are respectively fixed on the two integrated steering knuckles.
Drawings
Fig. 1 is a schematic structural diagram of a hollow front axle according to an embodiment of the present invention;
fig. 2 is a schematic diagram of variable cross-sectional width of a hollowed front axle according to an embodiment of the present invention;
fig. 3 is a schematic view of the thickness of the lower section of the hollow front axle according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of a disc brake front axle assembly according to a second embodiment of the present invention;
FIG. 5 is a schematic view of a drum brake front axle assembly according to a third embodiment of the present invention;
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be appreciated that spatially relative terms such as "under … …," "under … …," "below," "under … …," "over … …," "above," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "under … …" and "under … …" may include both an upper and a lower orientation. Furthermore, the device may also include an additional orientation (e.g., rotated 90 ° or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. In the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", and the like, if the connected circuits, modules, units, and the like have electrical or data transferred therebetween.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
As shown in fig. 1, the present application provides a hollowed front axle, which comprises a middle cross beam 10, wherein two ends of the middle cross beam 10 are sequentially connected with a spring seat 20, a bent neck connecting part 30 and a fist part 40; the two ends of the hollowed front shaft are in axisymmetric structures;
wherein, the cross sections of the middle cross beam 10, the plate spring seat 20 and the bent neck connecting part 30 are in an I-shaped structure.
It can be understood that the middle cross beam 10, the plate spring seat 20, the bent neck connecting portion 30 and the fist portion 40 are manufactured by adopting an integral forging process, so that the integral structural stability of the front axle is ensured, and in particular, the middle cross beam 10, the plate spring seat 20 and the bent neck connecting portion 30 adopt an I-shaped cross section scanning transition,
in this embodiment, two hollow weight-reducing holes 10a are formed on the middle beam 10, and the two hollow weight-reducing holes 10a are symmetrically distributed along the symmetry axis of the middle beam 111;
in the preferred embodiment of the present application, the hollow lightening hole 10a is of an annular runway-shaped structure, which has a straight section a1 in the middle and semicircular sections a2 at two ends of the straight section a1, and the annular runway-shaped structure can bear the strength requirement on the mechanical structure, and the semicircular sections a2 make the hollow lightening hole 10a smoother at the corners, so that the stress is concentrated at the corners of the hollow lightening hole 10a when the middle cross beam 10 is stressed and deformed to cause structural damage.
Through practical verification tests, after the hollow weight-reducing hole 10a with the annular runway-shaped structure is adopted, the weight of the hollow front shaft is reduced by about 1/40 relative to the conventional weight-reducing hole without holes.
Preferably, in the embodiment of the application, the hollow front axle adopts the design of variable cross-section width and variable cross-section thickness, thereby not only ensuring that the plate spring seat 20 meets the installation requirement and optimizing the longitudinal rigidity on the premise of reaching the vertical bearing strength, but also avoiding the local material waste and the weight bias caused by the equal width design.
Specifically, in the embodiment of the present application, the upper and lower widths of the cross section of the neck connecting portion 30 are identical, the width thereof is defined as a reference width a, and the hollowed front axle satisfies the following relationship:
the lower end width b=0.6 to 0.8a of the plate spring seat 20; the upper end width c=1.8-2.4a of the plate spring seat 20, the upper and lower widths of the middle cross beam 10 are D, and d=1.2-1.5a.
It will be appreciated that in order to ensure structural optimization and weight reduction, the bottom of the plate spring seat 20 is designed with a transitional inclination angle; the upper part of the I-shaped cross section adopts a uniform thickness design, and the lower part of the I-shaped cross section adopts a non-uniform thickness (variable thickness) design.
Specifically, the thickness of the lower section of the middle cross beam 10 is defined as a reference thickness H, and the hollowed front axle satisfies:
the lower section thickness e=0.8 to 0.9h of the bent neck connecting portion 30, and the lower section thickness g=1.1 to 1.3h of the plate spring seat 20.
Specifically, the cross section width a of the bent neck connecting portion 30 and the lower section thickness H of the middle cross beam 10 can be designed to be reasonable widths according to the vehicle type and the load region thereof, and the embodiment adopts widening and reinforcing design according to stress distribution differences of different parts of the front axle and aiming at high-stress parts of the upper end section of the plate spring seat 20, so that the vertical bearing strength and rigidity are improved.
The fist 40 adopts a common interface design, can be used for installing a drum type front axle or a disc type front axle, and can meet two brake front axle structures by re-arranging the positions of connecting points of through holes of the fist 40.
As one practical use assembly structure of the hollowed front axle, a second embodiment of the present application provides a disc brake front axle assembly, which comprises an integrated knuckle 100, a zero-offset tie rod assembly 200, a T-shaped upper arm 300, a hub brake disc assembly 400, a disc brake 500 and the hollowed front axle 600 as described above, wherein the integrated knuckle 100 has two left knuckles and right knuckles, which are respectively connected with the fist portion 40 of the hollowed front axle 600 to form a revolute pair, and two ends of the zero-offset tie rod assembly 200 are respectively correspondingly connected with the two integrated knuckles 100 to restrain the front beam of the front axle assembly and prevent the two ends of the front axle assembly from disordered rotation; the wheel hub brake disc assembly 400 is installed on the two integrated steering knuckles 100 through bearing support, the T-shaped upper arm 300 is installed on the left steering knuckle or the right steering knuckle, bears steering force from the whole vehicle tyre, drives the front axle assembly to meet the requirement of the whole vehicle left steering or right steering, and is responsible for realizing rotary running by matching with the tyre, and the two disc brakes are respectively fixed on the two integrated steering knuckles and used for providing braking force for the wheel hub brake disc assembly 400 so as to realize speed reduction or parking under the emergency condition of the whole vehicle.
As another practical use assembling structure of the hollow front axle, a third embodiment of the present application provides a drum brake front axle assembly, which includes an integrated knuckle 100, a zero offset tie rod assembly 200, a T-shaped upper arm 300, a hub brake drum assembly 700, a drum brake 800, and the hollow front axle as described above; the two integrated steering knuckles 100 are respectively a left steering knuckle and a right steering knuckle, which are respectively connected with the fist part 40 of the hollowed front axle 600 to form a revolute pair, and two ends of the zero-offset tie rod 200 assembly are respectively correspondingly connected with the two integrated steering knuckles 100 to restrict the toe-in of the front axle assembly and prevent the two ends of the front axle assembly from rotating out of order; the hub brake drum assembly 700 is supported and installed on two integrated steering knuckles through bearings, bears vertical load from the whole vehicle tyre and is responsible for realizing rotary running by matching with the tyre; the T-shaped upper arm 300 is arranged on a left steering knuckle or a right steering knuckle and bears the steering force from the whole vehicle, so that the front axle assembly is driven to meet the requirement of the steering of the left rudder or the steering of the right rudder of the whole vehicle; the two drum brakes 800 are respectively fixed to the two integrated knuckles 100 to provide braking force to the hub brake drum assembly 400, thereby realizing deceleration or stopping of the entire vehicle in an emergency.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (6)

1. The hollowed front axle is characterized by comprising a middle cross beam, wherein two ends of the middle cross beam are sequentially connected with a spring seat, a bent neck connecting part and a fist part; the two ends of the hollowed front shaft are in axisymmetric structures;
the cross sections of the middle cross beam, the plate spring seat and the bent neck connecting part are of I-shaped structures;
two hollowed lightening holes are formed in the middle cross beam and are symmetrically distributed on the symmetry axis of the middle cross beam;
the fist part adopts a common interface design and can be used for installing a drum type front axle or a disc type front axle.
2. The hollowed front axle of claim 1, wherein the hollowed lightening holes are of an annular racetrack-shaped configuration having a straight section in the middle and semi-circular sections at both ends of the straight section.
3. The hollowed front axle according to claim 1, wherein the upper and lower widths of the cross section of the bent neck connecting portion are identical and define the width thereof as a reference width a, and the hollowed front axle satisfies the following relationship:
the width B=0.6-0.8A of the lower end of the plate spring seat; the upper end width C=1.8 ~2.4A of plate spring seat, the upper and lower width of middle part crossbeam is D, and D=1.2 ~1.5A.
4. The hollowed front axle according to claim 1, wherein the thickness of the lower section of the middle cross beam is defined as a reference thickness H, and the hollowed front axle satisfies:
the lower section thickness E=0.8-0.9H of the bent neck connecting part, and the lower section thickness G=1.1-1.3H of the plate spring seat.
5. A disc brake front axle assembly, which comprises an integrated steering knuckle, a zero-offset tie rod assembly, a T-shaped upper arm, a hub brake disc assembly, a disc brake and a hollowed front axle according to any one of claims 1-4, wherein the integrated steering knuckle is connected with a fist part to form a revolute pair, two integrated steering knuckles positioned at two ends are connected at two ends of the zero-offset tie rod assembly, the hub brake disc assembly is installed on the two integrated steering knuckles through a bearing support, the T-shaped upper arm is installed on any one of the integrated steering knuckles to drive the front axle assembly to steer, and the two disc brakes are respectively fixed on the two integrated steering knuckles.
6. A drum brake front axle assembly comprising an integrated knuckle, a zero offset tie rod assembly, a T-shaped upper arm, a hub brake drum assembly, a drum brake and a hollow front axle as claimed in any one of claims 1 to 4; the integrated steering knuckle is connected with the fist part to form a revolute pair, two integrated steering knuckles at two ends are connected at two ends of the zero-offset tie rod assembly, the hub brake drum assembly is installed on the two integrated steering knuckles through bearing support, and the T-shaped upper arm is installed on any one of the integrated steering knuckles so as to drive the front axle assembly to steer, and the two drum brakes are respectively fixed on the two integrated steering knuckles.
CN202311497372.5A 2023-11-10 2023-11-10 Hollow front axle, disc brake front axle assembly and drum brake front axle assembly Pending CN117507679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311497372.5A CN117507679A (en) 2023-11-10 2023-11-10 Hollow front axle, disc brake front axle assembly and drum brake front axle assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311497372.5A CN117507679A (en) 2023-11-10 2023-11-10 Hollow front axle, disc brake front axle assembly and drum brake front axle assembly

Publications (1)

Publication Number Publication Date
CN117507679A true CN117507679A (en) 2024-02-06

Family

ID=89754462

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311497372.5A Pending CN117507679A (en) 2023-11-10 2023-11-10 Hollow front axle, disc brake front axle assembly and drum brake front axle assembly

Country Status (1)

Country Link
CN (1) CN117507679A (en)

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