CN113685467A - Wheel hub, wheel hub subassembly, stopper and motor - Google Patents

Wheel hub, wheel hub subassembly, stopper and motor Download PDF

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Publication number
CN113685467A
CN113685467A CN202110969840.9A CN202110969840A CN113685467A CN 113685467 A CN113685467 A CN 113685467A CN 202110969840 A CN202110969840 A CN 202110969840A CN 113685467 A CN113685467 A CN 113685467A
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CN
China
Prior art keywords
shaft section
shaft
hub
hole
brake
Prior art date
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Granted
Application number
CN202110969840.9A
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Chinese (zh)
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CN113685467B (en
Inventor
陈飞龙
叶小奔
刘娜
曹希
华贤龙
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Gree Electric Appliances Inc of Zhuhai
Zhuhai Kaibang Motor Manufacture Co Ltd
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Zhuhai Kaibang Motor Manufacture Co Ltd
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Priority to CN202110969840.9A priority Critical patent/CN113685467B/en
Publication of CN113685467A publication Critical patent/CN113685467A/en
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Publication of CN113685467B publication Critical patent/CN113685467B/en
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    • 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/12—Discs; Drums for disc brakes
    • 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
    • F16D65/00—Parts or details
    • F16D65/0006—Noise or vibration control
    • 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/12—Discs; Drums for disc brakes
    • F16D65/123—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting
    • 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
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
    • H02K7/1021—Magnetically influenced friction brakes
    • H02K7/1023—Magnetically influenced friction brakes using electromagnets
    • 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1388—Connection to shaft or axle
    • 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1392—Connection elements
    • 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
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Abstract

The invention provides a wheel hub, a wheel hub assembly, a brake and a motor, wherein the wheel hub is suitable for the brake, and comprises: the first shaft section is used for being matched with an inner hole of a friction plate of the brake in an inserting manner; a second shaft section having a diameter greater than the diameter of the first shaft section; the shaft hole penetrates through the first shaft section and the second shaft section and is used for being sleeved on the rotating shaft; and the buffer holes are arranged on the end surface of the second shaft section at intervals, and the central line of each buffer hole is parallel to the central line of the shaft hole. The hub solves the problem that when the brake in the prior art is powered off, larger impact force is generated between the armature and the hub component to cause part deformation.

Description

Wheel hub, wheel hub subassembly, stopper and motor
Technical Field
The invention relates to the technical field of braking, in particular to a hub, a hub assembly, a brake and a motor.
Background
The brake is an indispensable part in the mechanical braking process of a rotating mechanism (such as a motor device) and comprises an end cover, a brake iron core, a friction plate, a spring, a hub, an armature, a winding, a framework and the like, wherein the brake iron core and the end cover form a fixed structure through a screw or cold pressing or hot sleeving, the friction plate and the hub are fixedly connected to form a hub assembly, the framework and the winding are embedded into the brake iron core, a gap exists between the iron core and the armature, the gap is the working stroke of the armature, and a plurality of springs are arranged between the brake iron core and the armature.
The hub assembly is mounted on a motor rotating shaft, the end cover is mounted on a motor shell, and the end cover is provided with a bearing position. When the brake is powered off, the armature is tightly pressed to the hub assembly by the elastic force of the spring, and the hub assembly is in a braking state because the hub assembly cannot rotate circumferentially; when the brake is electrified, the armature is attracted down by the electromagnetic force formed by the brake iron core and the winding and overcoming the elastic force of the spring, and the hub component can freely rotate to present a brake releasing state.
However, when the brake of the prior art is de-energized, the spring force presses the armature toward the hub assembly, and the following problems occur:
(1) the armature and the hub component generate larger impact force due to collision, so that parts are greatly deformed, the gap between the iron core and the armature is enlarged, the working stroke is increased, and finally, the electromagnetic force is reduced and is not enough to overcome the elastic force of the spring, so that the brake fails;
(2) the armature collides with the hub assembly to generate large noise, which affects the user experience.
Disclosure of Invention
The invention mainly aims to provide a hub, a hub assembly, a brake and a motor, which are used for solving the problem that parts are deformed due to the fact that large impact force is generated between an armature and the hub assembly when the brake in the prior art is powered off.
To achieve the above object, according to one aspect of the present invention, there is provided a hub adapted for a brake, the hub comprising: the first shaft section is used for being matched with an inner hole of a friction plate of the brake in an inserting manner; a second shaft section having a diameter greater than the diameter of the first shaft section; the shaft hole penetrates through the first shaft section and the second shaft section and is used for being sleeved on the rotating shaft; and the buffer holes are arranged on the end surface of the second shaft section at intervals, and the central line of each buffer hole is parallel to the central line of the shaft hole.
Further, the diameter of the first shaft section is D1, the diameter of the second shaft section is D2, the distance between the center line of the buffer hole and the center line of the shaft hole is R, wherein D1 < 2R < D2; and/or the buffer hole is a circular hole with a diameter d, wherein,
Figure BDA0003225250520000011
further, a plurality of buffer holes are uniformly arranged around the center line of the shaft hole in 360 degrees.
Furthermore, the buffer hole is a through hole or a blind hole; and/or the number of the buffer holes is nine; and/or the buffer hole is a round hole, an elliptical hole or a square hole.
Further, the ratio of the diameter of the first shaft section to the diameter of the second shaft section ranges from 0.2 to 0.8.
Further, the wheel hub includes the third shaft section, and the shaft hole runs through the third shaft section, and the third shaft section is located the one side that the first shaft section was kept away from to the second shaft section, and the diameter of third shaft section is less than the diameter of first shaft section.
Further, the ratio of the diameter of the third shaft section to the diameter of the second shaft section ranges from 0.2 to 0.8.
Furthermore, a plurality of threaded holes which are in one-to-one threaded fit with the fasteners are formed in the third shaft section, the threaded holes are arranged at intervals around the outer peripheral surface of the third shaft section, and the center line of each threaded hole is perpendicular to the center line of the shaft hole; one end of each threaded hole is located on the outer peripheral surface of the third shaft section, one end of each threaded hole is located on the wall surface of the shaft hole, and one end of each fastener penetrates through the corresponding threaded hole and then abuts against the outer peripheral surface of the rotating shaft.
Further, the wheel hub comprises a first key groove, the first key groove is formed in the shaft hole, and a second key groove corresponding to the first key groove is formed in the rotating shaft so as to jointly enclose an installation space for installing the key.
According to a second aspect of the present invention, there is provided a hub assembly comprising: the above-mentioned hub; a friction plate; the hub is fixedly connected with the friction plate, and the friction plate is positioned on one side of the second shaft section close to the first shaft section and sleeved on the first shaft section.
According to a third aspect of the present invention there is provided a brake comprising a hub assembly and at least part of a movable armature assembly, the armature assembly comprising a braking state in contact with the hub assembly and a contact braking state separated from the hub assembly, the hub assembly being as described above.
According to a fourth aspect of the present invention, there is provided an electric motor comprising a rotating shaft and a brake mounted on the rotating shaft, the brake being the brake described above.
By applying the technical scheme of the invention, the hub is suitable for the brake, and comprises: the first shaft section is used for being matched with an inner hole of a friction plate of the brake in an inserting manner; a second shaft section having a diameter greater than the diameter of the first shaft section; the shaft hole penetrates through the first shaft section and the second shaft section and is used for being sleeved on the rotating shaft; a plurality of cushion holes, a plurality of cushion hole intervals set up on the terminal surface of second axle section, the central line of each cushion hole is on a parallel with the central line in shaft hole, in order to reduce the impact force that armature and wheel hub collision produced when the stopper is braking, reduce the deflection of part, guarantee the reasonable working stroke of stopper, the noise that produces when reducing the braking, promote user's use and experience, when having solved the stopper outage among the prior art, can produce great impact force and lead to the problem that the part warp between armature and wheel hub subassembly.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of an embodiment of a hub according to the invention;
FIG. 2 shows a front view of the hub shown in FIG. 1;
FIG. 3 shows a half-sectional view of the hub shown in FIG. 1;
FIG. 4 shows a schematic structural view of an embodiment of the hub assembly of the present invention having the hub shown in FIG. 1 in one orientation;
FIG. 5 shows a schematic structural view of an embodiment of the hub assembly of the present invention having the hub shown in FIG. 1 in another orientation;
FIG. 6 shows a cross-sectional view of an embodiment of the brake of the present invention having the hub assembly shown in FIG. 4 mounted on a motor;
FIG. 7 is a schematic magnetic circuit diagram of an embodiment of the brake of the present invention having the hub assembly of FIG. 4 in operation;
FIG. 8 is a graph showing the variation of impact force with the diameter of the buffer hole when the brake having the hub shown in FIG. 1 is de-energized; and
FIG. 9 is a graph showing the amount of part permanent deformation produced by the second shaft section of the hub when de-energized for a brake having the hub shown in FIG. 1 as a function of the diameter of the relief hole.
Wherein the figures include the following reference numerals:
1. a first shaft section; 2. a second shaft section; 3. a third shaft section; 4. a shaft hole; 5. a buffer hole; 6. a threaded hole; 7. a first keyway;
10. a hub; 20. a friction plate; 21. an inner bore; 30. an armature; 40. an elastic member; 50. a coil; 60. a framework; 70. an iron core; 71. an inner air gap; 72. an outer air gap; 80. an end cap; 90. an outgoing line; 100. a rotating shaft; 110. a casing.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 7, the present invention provides a hub adapted for a brake, the hub comprising: the first shaft section 1 is used for being matched with an inner hole of a friction plate 20 of the brake in an inserting way; a second shaft section 2, the diameter of the second shaft section 2 is larger than that of the first shaft section 1; the shaft hole 4 penetrates through the first shaft section 1 and the second shaft section 2, so that the shaft hole 4 is sleeved on the rotating shaft 100; and a plurality of buffer holes 5, wherein the buffer holes 5 are arranged on the end surface of the second shaft section 2 at intervals, and the central line of each buffer hole 5 is parallel to the central line of the shaft hole 4.
The hub of the present invention is adapted for a brake, the hub comprising: the first shaft section 1 is used for being matched with an inner hole of a friction plate 20 of the brake in an inserting way; a second shaft section 2, the diameter of the second shaft section 2 is larger than that of the first shaft section 1; the shaft hole 4 penetrates through the first shaft section 1 and the second shaft section 2, so that the shaft hole 4 is sleeved on the rotating shaft 100; a plurality of cushion holes 5, a plurality of cushion holes 5 interval sets up on the terminal surface of second shaft section 2, the central line of each cushion hole 5 is on a parallel with the central line in shaft hole 4, in order to reduce the stopper impact force that armature and wheel hub collision produced when the braking, reduce the deflection of part, guarantee the reasonable working stroke of stopper, the noise that produces when reducing the braking, promote user and use experience, when having solved the stopper outage among the prior art, can produce great impact force and lead to the problem that the part warp between armature and wheel hub subassembly.
Specifically, when the hub receives impact force from the armature, the impact force and deformation of the second shaft section 2 are related to the mechanical rigidity and flexibility of the material of the impact surface of the hub and the mechanical performance of the first shaft section 1 and the third shaft section 3 connected with the second shaft section 2. The second shaft section 2 is provided with the buffer holes 5, so that the flexibility of the second shaft section 2 can be improved, the rigidity of the second shaft section can be reduced, and the improvement of the flexibility can enhance the buffer capacity of the second shaft section 2 when the second shaft section is impacted; simultaneously the sizes of the first shaft section 1 and the third shaft section 3 are reasonably designed, the connection rigidity between the second shaft section 2 and the first shaft section 1 and the third shaft section 3 is ensured, the reasonable matching of the three shaft sections is combined with the reasonable design of the buffer hole 5 of the second shaft section 2, and finally the purpose of improving the flexibility of the second shaft section 2 and ensuring the connection rigidity between the second shaft section 2 and the first shaft section 1 and the third shaft section 3 is realized, so that the deformation and the noise generated after the second shaft section 2 is subjected to impact force are reduced.
Preferably, the diameter of the first shaft section 1 is D1, the diameter of the second shaft section 2 is D2, and the distance between the center line of the buffer hole 5 and the center line of the shaft hole 4 is R, wherein D1 < 2R < D2; and/or the buffer hole 5 is a circular hole, the diameter of the buffer hole 5 is d, wherein,
Figure BDA0003225250520000041
as can be seen from the graph of fig. 8 showing the variation of the impact force generated when the brake having the hub of the present invention is deenergized according to the change of the diameter of the buffer hole 5, the impact force applied to the hub is significantly weakened by forming the buffer hole 5, and the impact force is first reduced and then increased as D × D1/D2 is increased.
As can be seen from the graph of fig. 9 showing the change of the permanent deformation of the parts of the second shaft section 2 of the hub according to the change of the diameter of the buffer hole 5 when the brake having the hub shown in fig. 1 is de-energized, the permanent deformation of the parts of the second shaft section 2 caused by the impact force is first reduced and then increased as D × D1/D2 is increased.
Specifically, the position of the permanent deformation of the part is the end face of the second shaft section 2 of the hub, if the permanent deformation is caused by a large impact force, the air gap of the working stroke between the armature 30 and the iron core 70 is increased, the brake is electrified under the condition that the current and the voltage are not changed, the electromagnetic attraction force generated by the coil 50 is greatly reduced due to the increase of the air gap of the working stroke, so that the electromagnetic attraction force cannot overcome the elastic force of the spring, and finally the armature 30 of the brake cannot pull in the brake.
In summary, with the brake having the hub of the present invention, when the diameter d of the cushion hole 5 satisfies d3 < d1 < d
Figure BDA0003225250520000042
When braking, the armature 30 and the brake armature can be effectively weakenedThe impact force that the wheel hub subassembly collision produced not only can reduce wheel hub's part permanent deformation volume, guarantees the reasonable working stroke of stopper, and the noise that produces in the time of can reducing the braking moreover promotes user's use and experiences.
Further preferably, the plurality of buffer holes 5 are uniformly arranged around the center line of the shaft hole 4 in 360 degrees, that is, the included angles of the connecting lines between the center lines of any two adjacent buffer holes 5 and the center line of the shaft hole 4 are equal.
In addition, the plurality of buffer holes 5 can be unevenly arranged around the central line of the shaft hole 4 in 360 degrees, that is, the included angles of the connecting lines between the central lines of any two adjacent buffer holes 5 parallel to the central line of the shaft hole 4 can be equal or unequal.
The buffer hole 5 is a through hole or a blind hole; and/or the number of buffer holes 5 is nine; and/or the buffer holes 5 are round holes, or elliptical holes, or square holes or other irregularly shaped holes.
The ratio of the diameter of the first shaft section 1 to the diameter of the second shaft section 2 ranges from 0.2 to 0.8. Thus, not only can the reliable connection between the hub 10 and the friction plate 20 be ensured, but also the impact force and the permanent deformation of parts generated by the collision of the armature 30 and the hub are small when the brake is braked.
As shown in fig. 1 to 3, the hub includes a third shaft section 3, the shaft hole 4 penetrates through the third shaft section 3, the third shaft section 3 is located on one side of the second shaft section 2 far away from the first shaft section 1, and the diameter of the third shaft section 3 is smaller than that of the first shaft section 1.
Specifically, the third shaft section 3 is provided with a plurality of threaded holes 6 which are used for being in threaded fit with a plurality of fasteners in a one-to-one correspondence manner, the plurality of threaded holes 6 are arranged at intervals around the outer peripheral surface of the third shaft section 3, and the central line of each threaded hole 6 is perpendicular to the central line of the shaft hole 4; one end of each threaded hole 6 is located on the outer peripheral surface of the third shaft section 3, one end of each threaded hole 6 is located on the hole wall surface of the shaft hole 4, and one end of each fastener penetrates through the corresponding threaded hole 6 and then abuts against the outer peripheral surface of the rotating shaft 100, so that the axial limiting of the hub on the rotating shaft 100 is realized through the threaded holes 6.
The ratio of the diameter of the third shaft section 3 to the diameter of the second shaft section 2 ranges from 0.2 to 0.8, so that the threaded hole 6 is ensured to have enough length to facilitate the installation and fixation of the fastener; and/or the difference between the length of the third shaft section 3 and the major diameter of the threaded bore 6 is greater than or equal to 4mm to ensure that the threaded bore 6 can be machined with a major diameter of sufficient size to facilitate installation and securement of a correspondingly sized fastener.
The wheel hub includes first keyway 7, and first keyway 7 sets up in shaft hole 4, is provided with the second keyway corresponding with first keyway 7 on the pivot 100 to enclose into the installation space who is used for the mounting key jointly, with realize spacing to wheel hub circumference on pivot 100 through first keyway 7 and second keyway.
As shown in fig. 4 and 5, the present invention provides a hub assembly comprising: the above-described hub 10; a friction plate 20; the hub is fixedly connected with the friction plate 20, and the friction plate 20 is located on one side of the second shaft section 2 close to the first shaft section 1 and is sleeved on the first shaft section 1 so as to be in contact with the movable armature to generate friction force.
The friction plate 20 is provided with an inner hole 21 which is used for being matched with the first shaft section 1 and sleeved on the first shaft section 1, and the inner hole 21 and the first shaft section 1 are in interference connection so that the hub 10 and the friction plate 20 are fixedly connected.
As shown in fig. 6, the present invention provides a brake including a hub assembly and at least a portion of a movable armature assembly, the armature assembly including a braking state in contact with the hub assembly and a contact braking state separated from the hub assembly, the hub assembly being as described above.
As shown in fig. 6, the present invention provides a motor, which includes a rotating shaft 100 and a brake mounted on the rotating shaft 100, wherein the brake is the above-mentioned brake.
Specifically, the brake of the invention is a split brake, which comprises a hub assembly and an armature assembly, wherein the hub assembly comprises a hub 10 and a friction plate 20 which are fixedly connected, the armature assembly comprises an armature 30, an elastic member 40, a coil 50, a framework 60, an iron core 70, an end cover 80, an outgoing line 90 and the like, the whole brake is mounted on a rotating shaft 100 of a motor and is positioned in a shell 110, the armature 30 is movably arranged along the rotating shaft 100, the end cover 80 is provided with a bearing position, the iron core 70 and the end cover 80 are connected through a fastener, cold pressing or hot sleeving to form a fixed structure, the coil 50 is wound on the framework 60 and is embedded in the iron core 70, a gap exists between the iron core 70 and the armature 30, and a plurality of elastic members 40 are arranged in the gap.
As shown in fig. 7, it can be seen from theoretical analysis that when the brake is energized, the magnetic field forms a cyclic main magnetic loop as indicated by an arrow along the armature 30 → the outer air gap 72 → the iron core 70 → the inner air gap 71 → the armature 30, and the electromagnetic force generated by the loop is denoted as F1, and the elastic force of the elastic element 40 is denoted as F2, where F1 < 2F 2.
When the brake is electrified, the electromagnetic force F1 is greater than the elastic force F2, and the armature moves close to the iron core 70 under the action of the combination force of the electromagnetic force F1 and the elastic force F and collides with the iron core 70 to generate a first impact force F3; when the brake is powered off, the electromagnetic force F1 is equal to 0, and the armature moves in a direction approaching the hub assembly under the action of the spring force F2 and collides with the friction plate 20 to generate a second impact force F4, the mass of the armature 30 is set to m, and the movement stroke of the armature 30 is set to S.
When the brake is electrified, the following conditions should be satisfied:
F1-F2＝ma1
when the brake is powered off, the following conditions should be satisfied:
F2＝ma2
obviously, a1＜a2Therefore, in the case where the movement stroke S of the armature 30 is the same when the brake is powered on and off, F3 < F4, that is, when the brake is powered off, the impact force generated by the armature 30 colliding with the hub 10 is greater than when the brake is powered on, and thus greater part deformation and noise are generated, and therefore, the hub 10 of the present invention needs to be provided to reduce the impact force generated by the armature 30 colliding with the hub 10 when the brake is powered off, the part deformation and noise.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the hub of the present invention is adapted for a brake, the hub comprising: the first shaft section 1 is used for being matched with an inner hole of a friction plate 20 of the brake in an inserting way; a second shaft section 2, the diameter of the second shaft section 2 is larger than that of the first shaft section 1; the shaft hole 4 penetrates through the first shaft section 1 and the second shaft section 2, so that the shaft hole 4 is sleeved on the rotating shaft 100; a plurality of cushion holes 5, a plurality of cushion holes 5 interval sets up on the terminal surface of second shaft section 2, the central line of each cushion hole 5 is on a parallel with the central line in shaft hole 4, in order to reduce the stopper impact force that armature and wheel hub collision produced when the braking, reduce the deflection of part, guarantee the reasonable working stroke of stopper, the noise that produces when reducing the braking, promote user and use experience, when having solved the stopper outage among the prior art, can produce great impact force and lead to the problem that the part warp between armature and wheel hub subassembly.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device 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 or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A hub adapted for use in a brake, said hub comprising:
the first shaft section (1) is used for being matched with an inner hole of a friction plate (20) of the brake in an inserting mode;
a second shaft section (2), the diameter of the second shaft section (2) being larger than the diameter of the first shaft section (1);
the shaft hole (4) penetrates through the first shaft section (1) and the second shaft section (2) so as to be sleeved on the rotating shaft (100);
the buffer holes (5) are arranged on the end face of the second shaft section (2) at intervals, and the center line of each buffer hole (5) is parallel to the center line of the shaft hole (4).
2. Hub according to claim 1, wherein the first shaft section (1) has a diameter D1 and the second shaft section (2) has a diameter D2,
the distance between the central line of the buffer hole (5) and the central line of the shaft hole (4) is R, wherein D1 < 2R < D2; and/or the presence of a gas in the gas,
the buffer holes (5) are round holes, the diameter of each buffer hole (5) is d, wherein,
Figure FDA0003225250510000011
3. hub according to claim 1 or 2, wherein a plurality of said relief holes (5) are evenly arranged around the centre line of said axle hole (4) in 360 °.
4. Hub according to claim 1 or 2,
the buffer holes (5) are through holes or blind holes; and/or
The number of the buffer holes (5) is nine; and/or
The buffer holes (5) are round holes, elliptical holes or square holes.
5. Hub according to claim 1 or 2,
the ratio of the diameter of the first shaft section (1) to the diameter of the second shaft section (2) ranges from 0.2 to 0.8.
6. Hub according to claim 1 or 2,
the wheel hub comprises a third shaft section (3), the shaft hole (4) penetrates through the third shaft section (3), the third shaft section (3) is located on one side, away from the first shaft section (1), of the second shaft section (2), and the diameter of the third shaft section (3) is smaller than that of the first shaft section (1).
7. The hub of claim 6,
the ratio of the diameter of the third shaft section (3) to the diameter of the second shaft section (2) ranges from 0.2 to 0.8.
8. The hub of claim 6,
the third shaft section (3) is provided with a plurality of threaded holes (6) which are in one-to-one threaded fit with a plurality of fasteners, the threaded holes (6) are arranged around the outer peripheral surface of the third shaft section (3) at intervals, and the central line of each threaded hole (6) is vertical to the central line of the shaft hole (4);
one end of each threaded hole (6) is located on the outer peripheral surface of the third shaft section (3), one end of each threaded hole (6) is located on the wall surface of the shaft hole (4), and one end of each fastener penetrates through the corresponding threaded hole (6) and then abuts against the outer peripheral surface of the rotating shaft (100).
9. Hub according to claim 1 or 2, wherein the hub comprises a first key slot (7), wherein the first key slot (7) is arranged in the shaft hole (4), and wherein a second key slot corresponding to the first key slot (7) is arranged on the shaft (100) to jointly enclose an installation space for an installation key.
10. A hub assembly, comprising:
a hub according to any one of claims 1 to 9;
a friction plate (20);
the hub is fixedly connected with the friction plate (20), and the friction plate (20) is located on one side, close to the first shaft section (1), of the second shaft section (2) and sleeved on the first shaft section (1).
11. A brake comprising a hub assembly and an at least partially movable armature assembly, the armature assembly comprising a braking state in contact with the hub assembly and a contact braking state separated from the hub assembly, wherein the hub assembly is the hub assembly of claim 10.
12. An electric machine comprising a shaft (100) and a brake mounted on said shaft (100), characterized in that said brake is a brake according to claim 11.
CN202110969840.9A 2021-08-23 2021-08-23 Wheel hub, wheel hub subassembly, stopper and motor Active CN113685467B (en)

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