CN111102308B - Automatic centering device, brake clamp unit, limit alarm method and installation method - Google Patents
Automatic centering device, brake clamp unit, limit alarm method and installation method Download PDFInfo
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- CN111102308B CN111102308B CN202010001354.3A CN202010001354A CN111102308B CN 111102308 B CN111102308 B CN 111102308B CN 202010001354 A CN202010001354 A CN 202010001354A CN 111102308 B CN111102308 B CN 111102308B
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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
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
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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
- F16D65/005—Components of axially engaging brakes not otherwise provided for
- F16D65/0068—Brake calipers
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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
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
- F16D66/022—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
- F16D66/025—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness sensing the position of parts of the brake system other than the braking members, e.g. limit switches mounted on master cylinders
Abstract
The invention relates to an automatic centering device, a brake clamp unit, a limit alarm method and an installation method, wherein the automatic centering device comprises a first installation seat component; the second mounting seat assembly is symmetrically mounted with the first mounting seat assembly and has the same structure; the first end part of the first elastic component is hinged with the first mounting seat component; the first end part of the second elastic component is hinged with the second mounting seat component, and the second end part of the second elastic component is hinged with the second end part of the first elastic component through a hinge; the first elastic assembly and the second elastic assembly have the same length and elasticity value. The invention can avoid abnormal abrasion caused by free swing of the brake clamp unit and automatically prompt the replacement of the brake pad after the abrasion of the brake pad is limited.
Description
Technical Field
The invention belongs to the technical field of rail transit, relates to a rail transit braking technology, and particularly relates to an automatic centering device for a brake clamp unit, the brake clamp unit, a limit alarm method and an installation method.
Background
The brake clamp unit is an actuating mechanism of a railway vehicle brake system, is used for converting compressed air pressure into mechanical reasoning and amplifying, realizes conversion of kinetic energy of a railway vehicle through friction between a brake disc and a brake pad, and achieves the purposes of speed regulation or parking. In the process of converting kinetic energy of the railway vehicle into heat energy, abrasion between a brake disc and a brake pad is mainly consumed, the brake pad is replaced more frequently, generally, the replacement period of the brake pad of the high-speed motor train unit is about 6 months, and the replacement period of the brake pad of the common railway passenger train is about 3 months due to no electric braking action. And whether the brake pad is replaced or not is judged, and the residual thickness of the brake pad is required to be observed.
The performance of the brake caliper unit directly influences the service life of a brake disc and a brake pad, the brake caliper unit is divided into a three-point installation type and a single-point installation type according to the installation mode, the single-point installation type brake caliper unit is mainly composed of a unit brake cylinder 11 and a brake caliper 12, the unit brake cylinder 11 is hinged with the brake caliper through four hinged bolts 13, and the brake caliper unit is fixedly connected with a bogie through a caliper hanger base 1201 through four bolts. Due to the free swing structure of the brake clamp unit, abnormal contact between a brake disc and a brake pad is easily caused in the running process of the railway vehicle, so that unnecessary abrasion is caused; when the gravity center of the brake clamp unit is not centered, abnormal abrasion is easily increased, the eccentric abrasion phenomenon is caused, and the service life of the brake pad is directly influenced.
In addition, when the railway vehicle is used for a certain time or a certain distance, the thickness of the brake pad is manually measured when the vehicle needs to stop so as to determine whether the brake pad is replaced, and due to the limitation of time and space, the brake pad is replaced when the abrasion of the brake pad exceeds the limit frequently, so that certain driving hidden danger is caused, or the brake pad is replaced under the condition that the abrasion limit is not reached, so that unnecessary waste is caused.
Firstly, aiming at the problem that the brake pad is easy to wear abnormally due to the free swing of a single-point installation type brake clamp unit, the Chinese patent with the publication number of CN106050991B discloses a limiting device for preventing a brake pad support from rotating, wherein the limiting device comprises a first limiting connecting rod, a second limiting connecting rod, a first guide rod and a second guide rod, the first limiting connecting rod and the second limiting connecting rod are arranged in parallel, the first guide rod and the second guide rod are oppositely arranged in the vertical direction of the first limiting connecting rod and the second limiting connecting rod, one end of the first guide rod is provided with a first guide hole, the top end of the second limiting connecting rod penetrates through the first guide hole, and one end of the first limiting connecting rod is fixedly connected with the position, close to the first guide hole, on the first guide rod; a second guide hole is formed in the position, close to the top end, of the second guide rod, one end of the first limiting connecting rod penetrates through the second guide hole, and one end of the second limiting connecting rod is fixedly connected with the top end of the second guide rod. However, this implementation can only ensure that the brake pads on both sides are parallel, but cannot ensure that the disc gaps on both sides are consistent, and can generate one-side abrasion when the vehicle passes through a large curve or receives a large impact.
Secondly, for the judgment that the abrasion of the brake pad is limited, the currently disclosed method is a method of directly observing the brake pad in a stationary state of the railway vehicle, and real-time detection in the running process of the railway vehicle cannot be realized. Publication No. CN108425974A discloses a brake pad wear indicating device and a mounting method thereof, which includes a housing having a sliding slot, an indicating block slidably disposed in the sliding slot, an indicating assembly, and an elastic member and a pull rope assembly. One end of the elastic piece is connected with the shell, and the other end of the elastic piece is connected with one end of the indicating block; one end of the pull rope component is connected with the other end of the indicating block, and the other end of the pull rope component is connected with the braking clamp unit. When the brake lining is not worn, the initial position of the indicating block is the first position, and when the brake lining is worn to the limit, the final position of the indicating block is the second position. When the brake pad is worn, the indicating block is pulled by the pull rope assembly to slide from the first position to the second position. The method evaluates the abrasion state of the brake pad by detecting the extension length of the brake clamp unit, and can intuitively and quickly obtain the information whether the brake pad is abraded to the limit, but the structure is relatively complex and needs additional installation space on a framework; and whether both sides brake lining all with wearing and tearing can't be appraised, have the risk of wrong report, for example: the one-sided wear overrun occurred while the other side was not worn to the limit but showed the possibility of not being worn to the limit. The Chinese patent application with the publication number of CN108223633A discloses a brake with a brake pad wear detection function and an installation method thereof, wherein the brake comprises a clamp support, a first brake pad, a brake disc, a wear indication rod and a proximity switch, the first brake pad and the brake disc are arranged on the clamp support, the wear indication rod is fixed on one side surface of the first brake pad far away from the brake disc, the proximity switch is fixedly arranged on the clamp support and close to the wear indication rod, and the wear indication rod is displaced along with the wear of the first brake pad until the wear indication rod reaches a preset position, and the state of the proximity switch is changed. The patent application evaluates the wear state of the brake pad by directly detecting the remaining effective thickness of the brake pad. However, in this method, the proximity switch is installed between the brake caliper body and the brake pad, and is only applicable to a structure in which the brake caliper body and the brake pad have relative movement.
Disclosure of Invention
The invention provides an automatic centering device, a brake caliper unit, a limit alarm method and an installation method for the brake caliper unit, aiming at the problems that the brake disc and a brake pad are abnormally abraded due to the free swing of a single-point type brake caliper unit in the running process of the conventional railway vehicle, and the like.
In order to achieve the above object, the present invention provides an automatic centering device for a brake caliper unit, comprising:
a first mount assembly;
the second mounting seat assembly is symmetrically mounted with the first mounting seat assembly and has the same structure;
the first end part of the first elastic component is hinged with the first mounting seat component;
the first end part of the second elastic component is hinged with the second mounting seat component, and the second end part of the second elastic component is hinged with the second end part of the first elastic component through a hinge;
the first elastic assembly and the second elastic assembly have the same length and elasticity value.
Preferably, the brake pad wear limit alarm device further comprises a limit switch and a brake pad wear limit alarm module connected with the limit switch, wherein the limit switch is mounted at the second end part of the first elastic assembly; the end part of the limit switch is provided with a micro contact, and the second end part of the second elastic component is provided with a limit switch contact area matched with the limit switch contact.
Preferably, the first elastic assembly comprises a first supporting piece, a first connecting piece and a first elastic piece arranged between the first supporting piece and the first connecting piece, the first end of the first supporting piece is hinged to the first mounting seat assembly, and the second end of the first supporting piece is connected with the first end of the first connecting piece through the first elastic piece.
Preferably, a cavity is arranged in the second end part of the first supporting part, and the first elastic part is placed in the cavity; one end of the first elastic piece is connected with the second end part of the first supporting piece, and the other end of the first elastic piece is connected with the first end part of the first connecting piece.
Preferably, the first mounting seat assembly comprises a first mounting seat, a first shaft sleeve is arranged on the upper portion of the first mounting seat, a first interference portion is arranged on the lower portion of the first mounting seat, a first end portion of the first supporting piece is hinged to the first shaft sleeve through a connecting pin shaft, and the first interference portion is pressed on the brake clamp.
Preferably, the second elastic assembly includes a second supporting member, a second connecting member and a second elastic member disposed between the second supporting member and the second connecting member, a first end of the second supporting member is hinged to the second mounting seat assembly, and a second end of the second supporting member is connected to the first end of the second connecting member through the second elastic member.
Preferably, a cavity is arranged in the second end part of the second supporting piece, and the second elastic piece is placed in the cavity; one end of the second elastic piece is connected with the second end of the second supporting piece, and the other end of the second elastic piece is connected with the first end of the second connecting piece.
Preferably, the second mounting seat assembly comprises a second mounting seat, a second shaft sleeve is arranged on the upper portion of the second mounting seat, a second interference portion is arranged on the lower portion of the second mounting seat, a first end portion of the second supporting piece is hinged to the second shaft sleeve through a connecting pin shaft, and the second interference portion is pressed on the brake clamp.
Preferably, the limit switch is mounted at the second end of the first connecting piece, and the contact area of the limit switch is arranged at the second end of the second connecting piece.
In order to achieve the above object, the present invention further provides a brake caliper unit, which includes a brake caliper, wherein an automatic centering device is installed on the brake caliper, the automatic centering device is the automatic centering device for the brake caliper unit, the first mounting seat assembly is installed on a caliper arm on one side of the brake caliper, the second mounting seat assembly is installed on a caliper arm on the other side of the brake caliper, and an end of the hinge is press-fitted on the caliper hanger.
In order to achieve the above object, the present invention further provides a brake pad wear limit warning method, based on the above automatic centering device for a brake caliper unit, including the following steps:
the limit switch collects contact and disconnection signals of the first elastic assembly and the second elastic assembly in real time;
when the limit switch acquires a contact signal, the brake pad abrasion limit alarm module is triggered to alarm, and replacement of the brake pad is prompted.
In order to achieve the above object, the present invention also provides an installation method of an automatic centering device for a brake caliper unit, comprising the steps of:
symmetrically installing the first installing seat component and the second installing seat component on two sides of a brake clamp of the brake clamp unit;
the first end part of the first supporting piece is hinged with the first mounting seat component, the second end part of the first supporting piece is connected with one end of the first elastic piece, and the other end of the first elastic piece is connected with the first end part of the first connecting piece;
a limit switch is arranged at the second end of the first connecting piece, the first end of the second supporting piece is hinged with the second mounting seat assembly, the second end of the second supporting piece is connected with one end of a second elastic piece, and the other end of the second elastic piece is connected with the first end of the second connecting piece;
and connecting the second end of the first connecting piece with the second end of the second connecting piece through a hinge piece, and press-fitting the end of the hinge piece on the clamp hanging seat in an interference manner.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) the invention automatically centers the brake clamp unit through the two elastic components, adjusts the state of the brake clamp unit, can prevent the brake clamp unit from freely swinging within a certain vibration range, enables the brake clamp unit to be always centered and prevents abnormal abrasion of a disc; and meanwhile, the requirement of follow-up of the brake clamp unit when the wheel set assembly has large transverse displacement relative to the bogie can be met.
(2) The abrasion condition of the brake pad is judged according to the change of the included angle formed by the two elastic components, when the abrasion of the brake pad reaches the limit, the included angle of the two elastic components reaches the maximum, the two elastic components are in contact, the contact and disconnection signals of the two elastic components are collected through the arranged limit switch to detect whether the abrasion of the brake pad reaches the limit, and if the abrasion reaches the limit, the alarm module gives an alarm through the abrasion of the brake pad to the limit alarm module, so that the brake pad is automatically prompted to be replaced.
Drawings
FIG. 1 is a schematic structural view of a conventional brake caliper unit;
FIG. 2 is a schematic structural view of a brake caliper unit according to an embodiment of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is an enlarged view of portion B of FIG. 2;
FIG. 5 is an enlarged view of portion C of FIG. 2;
FIG. 6 is a schematic view of a first mount assembly according to an embodiment of the invention;
FIG. 7 is a schematic structural diagram of a second mount assembly according to an embodiment of the invention;
FIG. 8 is a schematic structural diagram of a first elastic element according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a second elastic element according to an embodiment of the present invention;
FIG. 10 is a schematic view of the first resilient element, the second resilient element, and the relationship between the hinge member and the reference line of the brake caliper in accordance with the exemplary embodiment of the present invention.
In the drawing, 1, a first mounting seat assembly, 101, a first mounting seat, 102, a first shaft sleeve, 103, a first interference part, 2, a second mounting seat assembly, 201, a second mounting seat, 202, a second shaft sleeve, 203, a second interference part, 3, a first elastic assembly, 301, a first support piece, 302, a first connecting piece, 303, a first elastic piece, 304, a first universal bearing, 305, a third shaft sleeve, 306, a limit switch mounting seat, 4, a second resilient component, 401, a second support, 402, a second connector, 403, a second resilient component, 404, a limit switch contact area, 405, a second universal bearing, 406, a fourth bushing, 5, a limit switch, 501, a limit switch contact, 6, an articulation, 7, a connection pin, 8, a brake caliper datum line, 11, a unit brake cylinder, 12, a brake caliper, 1201, a caliper hanger, 13, an articulation bolt.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The brake pad replacing time is conveniently, quickly and accurately judged in order to reduce abnormal abrasion of the brake pad of the single-point installation type brake clamp unit in the application process of the railway vehicle, solve the problem of eccentric wear. The invention provides an automatic centering device for a brake clamp unit, the brake clamp unit, a limit alarm method and an installation method. The state of the brake caliper unit is automatically adjusted through the automatic centering device, so that abnormal abrasion is avoided all the time in the middle, the brake pad can be automatically prompted to be replaced after the abrasion of the brake pad is limited, the brake caliper unit structure is not only suitable for brake caliper units with relative motion between a brake caliper body and the brake pad, but also suitable for brake caliper units without relative motion between the brake caliper body and the brake pad, and the application range is wider. The above-described apparatus and method are described in detail below with specific examples.
Referring to fig. 2 and 3, an embodiment of the present invention provides an automatic centering device for a brake caliper unit, including:
a first mount assembly 1;
the second mounting base assembly 2 is symmetrically mounted with the first mounting base assembly 1 and has the same structure;
a first elastic component 3, wherein a first end part of the first elastic component 3 is hinged with the first mounting seat component 1;
a second elastic component 4, wherein a first end of the second elastic component 4 is hinged with the second mounting seat component 2, and a second end of the second elastic component 4 is hinged with a second end of the first elastic component 3 through a hinge 6;
the first elastic component 3 and the second elastic component 4 have the same length and elasticity value.
In rail vehicle braking system, the brake disc wearing capacity is far less than the wearing capacity of brake block, and for the wearing and tearing of brake block, the wearing and tearing of brake disc can be ignored, and the elasticity value of first elastic component is the same with the elasticity value of second elastic component, and the elasticity value is greater than the power that the free swing of brake caliper unit produced, and the elasticity value is greatly big for the power that the free swing of brake caliper unit produced, for example: the elastic force value is more than or equal to 10 times of the force generated by the free swing of the brake clamp unit, the setting of the elastic force value can be specifically adjusted according to the actual situation, and can be equal to 12 times, or 14 times or 15 times of the force generated by the free swing of the brake clamp unit. Therefore, the first elastic component and the second elastic component can be regarded as rigid in a natural state, the free swing of the brake caliper unit can be limited within a certain range, and the brake pad is prevented from being abnormally contacted with the brake disc. Because the lengths and the elastic values of the first elastic assembly and the second elastic assembly are the same, the braking clamp unit is in an axisymmetric state in an initial installation state, and at the moment, gaps between the braking pads and the braking disc on two sides of the braking clamp unit are equal, namely the braking clamp unit is in an optimal state. Along with the braking action, the brake pad gradually wears away, and the braking clamp unit adjusts, and first elastic component and the synchronous extension of second elastic component still can be in the axisymmetric state of braking clamp unit. The first elastic component and the second elastic component are matched, so that the consistent clearance between the discs on two sides of the brake clamp unit can be effectively ensured, and the phenomena of abnormal abrasion, eccentric wear and the like are avoided.
Referring to fig. 4 and 6, the first mounting seat assembly 1 includes a first mounting seat 101, a first bushing 102 is disposed on an upper portion of the first mounting seat 101, a first interference portion 103 is disposed on a lower portion of the first mounting seat 101, a first end portion of the first support 301 is hinged to the first bushing 102 through a connecting pin 7, and the first interference portion 103 is press-fitted to the brake caliper 12. Specifically, with continued reference to fig. 6, the upper portion of the first mounting seat 101 is provided with a U-shaped structure, and the first bushings 102 are press-fitted on two side walls of the U-shaped structure on the upper portion of the first mounting seat 101, that is, the two first bushings 102 are press-fitted on the upper portion of the first mounting seat.
The second mounting seat assembly 2 has the same structure as the first mounting seat assembly 1, and specifically, referring to fig. 5 and 7, the second mounting seat assembly 2 includes a second mounting seat 201, a second bushing 202 is disposed on an upper portion of the second mounting seat 201, a second interference portion 203 is disposed on a lower portion of the second mounting seat 201, a first end portion of the second supporting member 401 is hinged to the second bushing 102 through a connecting pin 7, and the second interference portion 203 is press-fitted to the brake caliper 12. With continued reference to fig. 7, similarly, the upper portion of the second mounting seat 201 is provided with a U-shaped structure, and the second bushings 202 are press-fitted on two side walls of the U-shaped structure on the upper portion of the second mounting seat 201, that is, two second bushings 202 are press-fitted on the upper portion of the second mounting seat 201.
Referring to fig. 8, the first elastic assembly 3 includes a first supporting member 301, a first connecting member 302, and a first elastic member 303 disposed between the first supporting member 301 and the first connecting member 302, wherein a first end of the first supporting member 301 is hinged to the first mount assembly 1, and a second end of the first supporting member 301 is connected to a first end of the first connecting member 302 through the first elastic member 303. Specifically, with continued reference to fig. 4 and 8, the first end portion of the first support 301 is provided with a first universal bearing 304, and the first end portion of the first support 301 is hinged to the first mounting seat 101 through the first universal bearing 304, the first bushing 102 and the connecting pin 7. The second end of the first connecting member 302 is press-fitted with a third shaft sleeve 305, and the first connecting member 302 is hinged to the second elastic member 4 through the third shaft sleeve and the hinge member 6.
Referring to fig. 9, the second elastic assembly 4 includes a second supporting member 401, a second connecting member 402, and a second elastic member 403 disposed between the second supporting member 401 and the second connecting member 402, wherein a first end of the second supporting member 401 is hinged to the second mount assembly 2, and a second end of the second supporting member 401 is connected to a first end of the second connecting member 402 through the second elastic member 403. Specifically, with continued reference to fig. 5 and 9, the first end of the second support 401 is provided with a second universal bearing 405, and the first end of the second support 401 is hinged to the second mounting seat 201 through the second universal bearing 405, the second bushing 202 and the connecting pin 7. The second end of the second connecting member 402 is press-fitted with a fourth shaft sleeve 406, which is different from the first connecting member 302, the second end of the second connecting member 402 is U-shaped, and the fourth shaft sleeves are press-fitted on two side walls of the U-shaped end, i.e. there are two shaft sleeves, when the second connecting member is hinged to the first connecting member 302, the second end of the first connecting member 302 is placed in the U-shaped second end of the second connecting member, and then the hinging of the two connecting members is realized through the third shaft sleeve, the fourth shaft sleeve and the hinging member 6.
With continued reference to fig. 8 and 9, in a preferred embodiment, the first supporting member, the first elastic member and the first connecting member form a first elastic component of the telescopic elastic structure. The second support member, the second elastic member and the second connecting member form a second elastic assembly of the telescopic elastic structure. Specifically, a cavity is arranged in the second end portion of the first supporting member 301, and the first elastic member 303 is placed in the cavity; one end of the first elastic member 303 is connected to the second end of the first supporting member 301, and the other end is connected to the first end of the first connecting member 302. A cavity is arranged in the second end of the second supporting member 401, and the second elastic member 403 is placed in the cavity; one end of the second elastic member 403 is connected to the second end of the second supporting member 401, and the other end is connected to the first end of the second connecting member 402. When the vehicle passes a curve or is greatly impacted, because the first elastic component and the second elastic component are both designed into free telescopic structures, when the impact force is greater than the elastic force values of the first elastic component and the second elastic component, the braking clamp unit can swing along with the first elastic component and the second elastic component, and the brake disc can be prevented from being locked on one side of the braking clamp unit.
With continued reference to fig. 2, 3, 8 and 9, in an embodiment, the automatic centering device further includes a limit switch 5 and a brake pad wear limit alarm module connected to the limit switch 5, wherein the limit switch 5 is mounted at the second end of the first elastic component 3; the end of the limit switch 5 is provided with a micro contact 501, and the second end of the second elastic component 4 is provided with a limit switch contact area 404 matched with the limit switch contact 501. Specifically, the second end of the first connecting piece 302 is provided with a limit switch mounting seat 306, the limit switch 5 is mounted on the limit switch mounting seat 306, and the limit switch contact area 501 is provided at the second end of the second connecting piece 402.
Assuming that the brake caliper unit is in the initial installation state, referring to fig. 10, the vertical distance from the hinge member 6 to the reference line 8 of the brake caliper unit is H, the displacement of the hinge bolts 13 at the two sides of the brake caliper 12 is L, and the length of the first elastic component 3 is a0The vertical included angle is alpha, A0The projection at L is X; the second elastic component 4 has a length B0The vertical included angle is beta, B0The projection on L is L-X, then:
it is known that:
the angle between the first elastic element 3 and the second elastic element 4 can be obtained:
when in use
When the value of α + β is a maximum, it is positively correlated with L. Namely, when the L is not changed, the included angle is maximum when the lengths of the first elastic component and the second elastic component are equal; when L is increased along with the abrasion of the brake pad, the included angle alpha + beta between the first elastic component and the second elastic component is gradually increased. Under the abrasion limit state of the brake clamp, the included angle between the first elastic component and the second elastic component is the largest, and the contact area of the limit switch on the second connecting piece just touches the limit switch contact fixed on the second end part of the first connecting piece, so that the brake pad abrasion limit alarm module is triggered to automatically alarm, and the brake pad replacement is prompted.
When the automatic centering device is installed, the method specifically comprises the following steps:
and S1, symmetrically installing the first installing seat assembly and the second installing seat assembly on the clamp arms at two sides of the brake clamp.
Specifically, the first mounting seat assembly and the second mounting seat assembly are mounted on a hinge bolt connecting the clamp arm and the unit brake cylinder, but not limited to the hinge bolt on the clamp arm, and any position on the clamp arm can be used as a mounting position of the first mounting seat assembly and the second mounting seat assembly, for example: can be installed at the brake pad supporting pin shaft, etc. It should be noted that the first mount assembly and the second mount assembly need to be symmetrically mounted.
And S2, hinging the first end part of the first supporting piece with the first mounting seat component, connecting the second end part of the first supporting piece with one end of the first elastic piece, and connecting the other end of the first elastic piece with the first end part of the first connecting piece.
And S3, installing a limit switch at the second end of the first connecting piece, hinging the first end of the second supporting piece with the second installing seat component, connecting the second end of the second supporting piece with one end of a second elastic piece, and connecting the other end of the second elastic piece with the first end of the second connecting piece.
And S4, connecting the second end of the first connecting piece with the second end of the second connecting piece through a hinge piece, and press-fitting the end of the hinge piece on the clamp hanging seat in an interference manner.
With continued reference to fig. 2, another embodiment of the present invention further provides a brake caliper unit, which includes a unit brake cylinder 11 and a brake caliper 12, wherein an automatic centering device is installed on the brake caliper 12, the automatic centering device is the automatic centering device of the brake caliper unit according to the above embodiment, the first mounting seat assembly 1 is installed on the caliper arm on one side of the brake caliper 12, the second mounting seat assembly 2 is installed on the caliper arm on the other side of the brake caliper 12, and the end of the hinge element 6 is press-fitted on the caliper hanger 1201 in an interference manner.
The brake caliper unit is provided with the automatic centering device, and the automatic centering device not only can automatically adjust the state of the brake caliper unit to enable the brake caliper unit to be centered all the time to avoid abnormal abrasion, but also can automatically prompt the replacement of the brake pad after the abrasion of the brake pad is limited.
The invention further provides a brake pad wear limit alarm method, and the automatic centering device for the brake caliper unit based on the embodiment comprises the following steps:
s1, acquiring contact and disconnection signals of the first elastic assembly and the second elastic assembly in real time by the limit switch;
and S2, when the limit switch collects the contact signal, triggering the brake pad abrasion limit alarm module to give an alarm, and prompting to replace the brake pad.
The method of the invention carries out limit alarm based on the automatic centering device with the function of automatically centering and alarming the abrasion limit of the brake pad, can automatically prompt the replacement of the brake pad after the abrasion of the brake pad reaches the limit, is simple, and can quickly and accurately judge the replacement time of the brake pad.
The above-described embodiments are intended to illustrate rather than to limit the invention, and any modifications and variations of the present invention are possible within the spirit and scope of the claims.
Claims (11)
1. An automatic centering device for a brake caliper unit, comprising:
a first mount assembly (1);
the second mounting base assembly (2) is symmetrically mounted with the first mounting base assembly (1) and has the same structure;
the first end of the first elastic component (3) is hinged with the first mounting seat component (1);
the first end of the second elastic component (4) is hinged with the second mounting seat component (2), and the second end of the second elastic component (4) is hinged with the second end of the first elastic component (3) through a hinge piece (6);
the lengths and the elastic values of the first elastic assembly (3) and the second elastic assembly (4) are the same;
the brake pad abrasion limit alarm device further comprises a limit switch (5) and a brake pad abrasion limit alarm module connected with the limit switch (5), wherein the limit switch (5) is installed at the second end part of the first elastic component (3); a limit switch contact (501) is arranged at the end part of the limit switch (5), and a limit switch contact area (404) matched with the limit switch contact (501) is arranged at the second end part of the second elastic component (4);
the abrasion condition of the brake pad is judged according to the change of the included angle between the first elastic component (3) and the second elastic component (4), along with the abrasion of the brake pad, when the displacement of the hinged bolts on the two sides of the brake clamp is increased, the included angle between the first elastic component and the second elastic component is gradually increased, when the abrasion limit state of the brake clamp is reached, the included angle between the first elastic component (3) and the second elastic component (4) is maximum, at the moment, a limit switch contact area (404) on the second end part of the second elastic component (4) just touches a limit switch contact (501) fixed on the second end part of the first elastic component (3), and the brake pad abrasion limit alarm module is triggered to automatically alarm.
2. The automatic centering device for a brake-caliper unit according to claim 1, characterized in that said first elastic assembly (3) comprises a first support (301), a first connection (302) and a first elastic member (303) interposed between said first support (301) and said first connection (302), a first end of said first support (301) being hinged to said first mounting assembly (1), a second end of said first support (301) being connected to a first end of said first connection (302) through said first elastic member (303).
3. The automatic centering device for a brake-caliper unit according to claim 2, characterized in that a cavity is provided in the second end of the first support (301), said first elastic element (303) being placed in the cavity; one end of the first elastic piece (303) is connected with the second end of the first support piece (301), and the other end is connected with the first end of the first connecting piece (302).
4. The automatic centering device for a brake caliper unit according to claim 2 or 3, wherein the first mounting seat assembly (1) comprises a first mounting seat (101), a first bushing (102) is arranged at the upper part of the first mounting seat (101), a first interference part (103) is arranged at the lower part of the first mounting seat, the first end part of the first supporting member (301) is hinged with the first bushing (102) through a connecting pin shaft (7), and the first interference part (103) is pressed on the brake caliper (12).
5. The automatic centering device for a brake caliper unit according to claim 2, characterized in that said second elastic assembly (4) comprises a second support (401), a second connecting member (402) and a second elastic member (403) interposed between said second support (401) and said second connecting member (402), a first end of said second support (401) being hinged to said second mounting assembly (2), a second end of said second support (401) being connected to a first end of said second connecting member (402) through said second elastic member (403).
6. The automatic centering device for a brake-caliper unit according to claim 5, characterized in that a cavity is provided in the second end of the second support element (401), said second elastic element (403) being placed in the cavity; one end of the second elastic member (403) is connected to the second end of the second supporting member (401), and the other end is connected to the first end of the second connecting member (402).
7. The automatic centering device for a brake caliper unit according to claim 5 or 6, wherein the second mounting seat assembly (2) comprises a second mounting seat (201), the second mounting seat (201) is provided with a second bushing (202) at the upper part and a second interference part (203) at the lower part, the first end part of the second supporting member (401) is hinged with the second bushing (202) through a connecting pin shaft (7), and the second interference part (203) is pressed on the brake caliper (12).
8. Automatic centering device for a brake caliper unit according to claim 5, characterized in that said limit switch (5) is mounted at the second end of the first connecting piece (302), said limit switch contact area (404) being provided at the second end of the second connecting piece (402).
9. A brake caliper unit, characterized in that it comprises a brake caliper (12), said brake caliper (12) having an automatic centering device mounted thereon, said automatic centering device being as claimed in any one of claims 1 to 8 for a brake caliper unit, said first mounting block assembly (1) being mounted on the caliper arm on one side of the brake caliper (12), said second mounting block assembly (2) being mounted on the caliper arm on the other side of the brake caliper (12), the end of said hinge member (6) being press-fitted with interference on the caliper hanger (1201).
10. A brake pad wear limit warning method, characterized in that the automatic centering device for a brake caliper unit according to any one of claims 1 to 8 is used, comprising the steps of:
the limit switch collects contact and disconnection signals of the first elastic assembly and the second elastic assembly in real time;
when the limit switch acquires a contact signal, the brake pad abrasion limit alarm module is triggered to alarm, and replacement of the brake pad is prompted.
11. A method of installing an automatic centering device for a brake caliper unit according to claim 8, comprising the steps of:
symmetrically installing the first installing seat component and the second installing seat component on the clamp arms at two sides of the brake clamp;
the first end part of the first supporting piece is hinged with the first mounting seat component, the second end part of the first supporting piece is connected with one end of the first elastic piece, and the other end of the first elastic piece is connected with the first end part of the first connecting piece;
a limit switch is arranged at the second end of the first connecting piece, the first end of the second supporting piece is hinged with the second mounting seat assembly, the second end of the second supporting piece is connected with one end of a second elastic piece, and the other end of the second elastic piece is connected with the first end of the second connecting piece;
and connecting the second end of the first connecting piece with the second end of the second connecting piece through a hinge piece, and press-fitting the end of the hinge piece on the clamp hanging seat in an interference manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010001354.3A CN111102308B (en) | 2020-01-02 | 2020-01-02 | Automatic centering device, brake clamp unit, limit alarm method and installation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010001354.3A CN111102308B (en) | 2020-01-02 | 2020-01-02 | Automatic centering device, brake clamp unit, limit alarm method and installation method |
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| Publication Number | Publication Date |
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| CN111102308A CN111102308A (en) | 2020-05-05 |
| CN111102308B true CN111102308B (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010001354.3A Active CN111102308B (en) | 2020-01-02 | 2020-01-02 | Automatic centering device, brake clamp unit, limit alarm method and installation method |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS538944A (en) * | 1976-07-12 | 1978-01-26 | Bridgestone Cycle Ind Co | Caliper brake for bicycle |
| DE102010023700B4 (en) * | 2010-06-14 | 2012-01-26 | Pintsch Bubenzer Gmbh | Adjusting device for a self-energizing brake device and self-energizing brake device |
| DE102012207313A1 (en) * | 2012-05-03 | 2013-11-07 | Schaeffler Technologies AG & Co. KG | Centering device for e.g. ring gear brake, for planetary gears between crankshaft and pulley of belt drive in motor car, has brake shoes spring-loaded by springs at centering element to center brake shoes relative to brake disk |
| CN103195847B (en) * | 2013-04-23 | 2015-05-20 | 焦作市制动器有限公司 | Intelligent brake |
| DE102013114525A1 (en) * | 2013-12-19 | 2015-06-25 | Pintsch Bubenzer Gmbh | Stop arrangement and braking device with such |
| JP6912986B2 (en) * | 2017-09-22 | 2021-08-04 | 三菱重工エンジニアリング株式会社 | Brake caliper device |
| CN108423027B (en) * | 2018-03-16 | 2019-07-12 | 中车青岛四方车辆研究所有限公司 | Follower and brake clamp unit for gauge-changeable bogie |
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2020
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