CN217056100U - I-D type forked tail steel backing brake lining of no revolving stage of preventing - Google Patents
I-D type forked tail steel backing brake lining of no revolving stage of preventing Download PDFInfo
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- CN217056100U CN217056100U CN202220998142.1U CN202220998142U CN217056100U CN 217056100 U CN217056100 U CN 217056100U CN 202220998142 U CN202220998142 U CN 202220998142U CN 217056100 U CN217056100 U CN 217056100U
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Abstract
The utility model discloses a I-D type forked tail steel backing brake block of no revolving stage of preventing is applied to 200 ~ 250km/h speed grade's EMUs, including the steel backing base member, the upper end surface of steel backing base member is provided with the friction unit, and the three clutch blocks of first friction unit are the echelonment and set gradually in the one side of being close to first straight flange on the steel backing base member, and the clutch block of first friction unit all deflects 10 ~ 15 compared with first straight flange; the second friction unit is arranged on one side, away from the first straight edge, of the first friction unit, and three friction blocks in the second friction unit are respectively attached to three corresponding friction blocks in the first friction unit; the three friction blocks of the third friction unit are arranged on the right side of the second friction unit in an inverted triangle shape, and the three friction blocks of the third friction unit are arranged in a manner of being attached to each other in pairs. The brake pad without the anti-rotation platform and with a larger effective friction area is provided.
Description
Technical Field
The utility model relates to a high speed train braking equipment technical field especially relates to a do not have I-D type forked tail steel backing brake block of preventing revolving stage.
Background
The brake pad of the high-speed motor car is usually made of dovetail steel backs with a plurality of friction blocks, according to the requirements of national standards, the size of the friction blocks is selected to be reduced for facilitating the arrangement of the friction blocks of the brake pads produced by most of the current motor car brake pad manufacturers, so that the traditional motor car brake pad only has 280-290 cm 2 Left and right effective friction area. However, such a design has the following problems:
1. the pressure intensity that less effective friction area makeed the clutch blocks receive increases, and then causes the eccentric wear condition aggravation of brake block, and the life-span of brake block reduces greatly, still has certain potential safety hazard simultaneously.
2. The plurality of anti-rotation tables are required to be arranged to avoid the reduction of braking friction force and the potential safety hazard caused by the deflection of friction blocks in the braking process. However, the installation of the friction block is troublesome after the anti-rotation platform is additionally installed, and meanwhile, due to the fact that the friction block with a small friction area is selected, the braking stroke is longer in the actual use process, the friction heat generated in the unit area is higher, the friction block is more easily adhered with the anti-rotation platform around the friction block at a high temperature, and then the friction block fails, and potential safety hazards are generated.
3. The brake pad of the traditional bullet train only considers whether the dovetail steel backing can be fully arranged when the friction blocks are arranged and arranged, and neglects the stress of the edges of the friction blocks in the braking process, so that the individual friction blocks are broken in the braking process, and the service life of the brake pad is greatly shortened.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a do not have I-D type forked tail steel backing brake block of preventing revolving stage, the utility model discloses a realize like this:
the I-D type dovetail steel backing brake pad without the anti-rotation platform comprises a steel backing base body, the outer contour edge of the steel backing base body comprises a long arc edge and a short arc edge which is in the same direction as the long arc edge and is arranged at an interval with the long arc edge, the left end of the long arc edge and the left end of the short arc edge are connected through a first straight edge, the first straight edge is perpendicular to the long arc edge and the short arc edge respectively, the right end of the long arc edge and the right end of the short arc edge are connected through a second straight edge, one side, close to the long arc edge, of the second straight edge is subjected to chamfering treatment, a friction unit is arranged on the upper end surface of the steel backing base body and comprises a first friction unit, a second friction unit and a third friction unit, each friction unit comprises three friction blocks, and each friction block is composed of a friction body in the shape of a regular quadrilateral prism, The framework is also formed by sintering pins;
the three friction blocks of the first friction unit are sequentially arranged on one side, close to the first straight edge, of the steel back base body in a stepped mode, and the friction blocks of the first friction unit deflect 10-15 degrees compared with the first straight edge;
the second friction unit is arranged on one side, away from the first straight edge, of the first friction unit, and three friction blocks in the second friction unit are respectively attached to three corresponding friction blocks in the first friction unit;
the three clutch blocks of third friction unit be down "article style of calligraphy" set up in the right side of second friction unit, the three clutch blocks of third friction unit two liang each other paste and lean on the setting.
Preferably, the side length of the friction body is 48mm, the high edge of the friction body is chamfered with a radius of 10mm, and the friction body is further provided with a heat dissipation through hole with a diameter of 14 mm.
As a further improvement, the upper end surface of the steel backing base body is provided with a plurality of mounting grooves, the lower end surface of the steel backing base body is provided with a plurality of fixing grooves concentric with the mounting grooves, the fixing grooves are communicated with the mounting grooves through pin holes, the friction block is adapted and mounted in the mounting grooves through a detachable claw-shaped disc spring, the pin penetrates through the pin holes and extends into the fixing grooves, and one end of the pin, far away from the friction body, is clamped through a disc spring adapted to the fixing grooves.
Preferably, the depth of the mounting groove is 1-3 mm, and a steel back ball socket is further arranged in the mounting groove;
the depth of the fixed groove is 4-6 mm;
one side of the framework, which is close to the mounting groove, is provided with a ball protrusion matched with the steel back ball socket in shape, and the ball protrusion and the steel back ball socket are arranged at an interval of 0.6-1.2 mm.
As a further improvement, the claw-shaped disk spring comprises a mounting ring, the mounting ring is adapted to the mounting groove, a plurality of sector arc plates are fixedly arranged on the inner ring circumference array of the mounting ring, and the short arc edges of the sector arc plates are adapted to the maximum outer diameter of the spherical bulge. And the upper end surface of the fan-arc plate is flush attached to the lower end surface of the framework.
Preferably, the thickness of the fan arc plate is 0.8 mm.
Preferably, all three friction blocks in the third friction unit are deflected by 35-55 degrees compared with the first straight edge.
The beneficial effects of the utility model reside in that:
1. through set up nine clutch blocks that have the prismatic friction body of regular quadrilateral on the steel backing base member at I-D type forked tail steel backing, and the second friction unit sets up in the one side that first straight flange was kept away from to first friction unit, three clutch blocks in the second friction unit pastes with corresponding three clutch block in the first friction unit respectively and leans on the setting, three clutch block of third friction unit pastes and leans on the setting two liang each other, when having realized the effective friction area of the friction body at increase clutch block, need not increase and defend the revolving stage, rely on between the clutch block to paste each other and spacing prevent to produce the rotation at the braking in-process and lead to the friction effect to reduce.
2. Through the effective friction area who has increased the frictional mass, reduced unit area's frictional heat on the braking in-process clutch blocks, the three clutch blocks through three friction unit simultaneously be down "article style of calligraphy" set up in the right side of second friction unit, the position that produces the highest friction temperature near the outer lane in forked tail steel back centre circle leaves great clearance in order in time to discharge high temperature abrasive dust, has reduced the probability that mutual adhesion takes place between the clutch blocks to overall structure's heat-sinking capability has been improved.
Drawings
Fig. 1 is a schematic diagram of the explosion structure of the present invention.
Fig. 2 is a schematic view of the front view structure of the present invention.
Fig. 3 is the structure diagram of the inner, middle and outer rings of the steel back base when the utility model is used with the shaft disc.
Fig. 4 is the utility model discloses in the steel backing base body, the division of well, outer lane when using with the rim plate cooperation to and frictional force direction analysis chart.
Fig. 5 is a schematic front view of the steel backing substrate of the present invention.
Fig. 6 is a rear view structure diagram of the steel backing base body of the present invention.
Fig. 7 is a schematic structural view of the claw-shaped disc spring of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
In the description of the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
As shown in fig. 1-7, the utility model provides a there is not I-D type forked tail steel backing brake lining of preventing revolving stage is applied to 200 ~ 250km/h speed grade's EMUs, including steel backing base member 1, the outline edge of steel backing base member 1 include a long arc limit 11a and one with long arc limit 11a is with orientation and the short arc limit 11b of interval setting, long arc limit 11a and the left end of short arc limit 11b is linked to each other by first straight flange 11c, first straight flange 11c is perpendicular to respectively long arc limit 11a and short arc limit 11b, long arc limit 11a and the right-hand member of short arc limit 11b is linked to each other by second straight flange 11D, second straight flange 11D is close to one side of long arc limit 11a is done the radius angle and is handled, the upper end surface of steel backing base member 1 is provided with the friction unit, the friction unit includes first friction unit 2a, 2b, A second friction unit 2b and a third friction unit 2c, each of which comprises three friction blocks 2, wherein each friction block 2 is formed by sintering a regular quadrilateral prismatic friction body, a framework 22 and pins 23;
the three friction blocks 2 of the first friction unit 2a are sequentially arranged on one side, close to the first straight edge 11c, of the steel back base body 1 in a stepped shape, and the friction blocks 2 of the first friction unit 2a deflect 10-15 degrees compared with the first straight edge 11 c;
the second friction unit 2b is arranged on one side of the first friction unit 2a far away from the first straight edge 11c, and three friction blocks 2 in the second friction unit 2b are respectively attached to corresponding three friction blocks 2 in the first friction unit 2 a;
three friction blocks 2 of third friction unit 2c are "article style of calligraphy" and set up in the right side of second friction unit 2b, three friction blocks 2 of third friction unit 2c two liang each other paste to lean on the setting, just three friction block 2 in the third friction unit 2c all deflect 35 ~ 55 compared in first straight flange 11 c.
When the I-D type dovetail steel backing brake pad is used, two symmetrical steel backing base bodies 1 are spliced to jointly act, and the dovetail steel backing can be divided into an inner ring 1a, a middle ring 1b and an outer ring 1c in sequence from a short arc edge 11b to a direction close to a long arc edge 11a by two circles concentric with a wheel disc or a shaft disc. Wherein, the diameter of the wheel disc used by matching the I-D type dovetail steel back is 355mm, and the diameter of the shaft disc is 335 mm. And the number ratio of the friction blocks 2 distributed on the inner ring 1a, the middle ring 1b and the outer ring 1c of the single steel back base body 1 is 2: 3.5: 3.5 or 2: 3: 4.
the highest friction heat generated by the I-D type dovetail steel backing brake pad applied to the high-speed motor train unit of 200-250 km/h during braking is usually concentrated at the position, close to the outer ring 1c, of the middle ring 1b, and the main reasons for the situation are as follows: 1. under the condition of the same angular velocity from the inner ring 1a to the outer ring 1c, the relative angular velocity between the steel backing matrix 1 and the wheel disc or the axle disc is gradually increased, and the generated friction heat is also gradually increased; 2. one side of the inner ring 1a, which is far away from the outer ring 1c, or one side of the outer ring 1c, which is far away from the inner ring 1a, is not blocked, friction heat energy generated by the outer ring 1c and the inner ring 1a in the braking process is rapidly exchanged with the outside, and meanwhile, high-temperature abrasive dust generated by the inner ring 1a and the outer ring 1c can be discharged in time to take away a large amount of friction heat.
As shown in fig. 3 and 4, the friction blocks 2 of the first friction unit 2a are all deflected by 10 to 15 ° compared with the first straight edge 11c, and the three friction blocks 2 of the third friction unit 2c are all deflected by 35 to 55 ° compared with the first straight edge 11c, so that a larger gap is formed between the third friction unit 2c and the second friction unit 2b and at the position of the middle ring 1b of the steel back base 1, and the gap is gradually increased toward the direction close to the outer ring 1c, so that a heat dissipation space can be effectively traveled by one stroke, a sufficient heat dissipation capability of the brake pad is ensured at the position, the outflow of the grinding dust can be ensured by the gap, and the heat dissipation capability is further improved. In addition, after the two steel backing matrixes 1 are spliced with each other, a larger gap is also reserved at the position, close to the outer ring 1c, of the middle ring 1b at the spliced position, and the gap is gradually increased towards the direction close to the outer ring 1c, so that the heat dissipation capacity of the brake pad at the highest temperature position is also improved.
Further, as shown in fig. 3 and 4, the friction blocks 2 of the first friction unit 2a are deflected by 10 to 15 ° compared with the first straight edge 11c, and the three friction blocks 2 of the first friction unit 2a are sequentially arranged on the steel backing base 1 at a side close to the first straight edge 11c in a step shape, and the three friction blocks 2 of the second friction unit 2b are respectively arranged to be attached to the corresponding three friction blocks 2 of the first friction unit 2 a. Can guarantee that the clearance area between every four two liang of adjacent clutch blocks 2 is unchangeable, the cascaded setting that inclines simultaneously can make the edge of clutch blocks 2 more laminate in the edge of steel backing base member 1, avoids the friction body to stretch out the forked tail steel backing too much and extrusion fracture in braking process. If the deflection angle is too large, nine regular quadrilateral friction blocks 2 cannot be effectively arranged on a single I-D type dovetail steel back, and the edge shape of the steel back base body 1 cannot be attached.
Furthermore, as shown in fig. 4, the direction of the friction force generated in the braking process forms an included angle of about 75-80 degrees with the edge of the friction block 2 which penetrates the friction force direction in the tangential direction, and compared with the direction of the friction force which is perpendicular to the edge, the arrangement mode can better avoid the edge of the friction block 2 from cracking due to overlarge impact at the moment of contact with the wheel disc or the shaft disc. If the deflection angle is too small, the included angle between each side of the friction block 2 and the friction force is more nearly vertical, so that greater impact is easily brought, and the service life of the brake pad is reduced.
Preferably, the side length of the friction body is 48mm, the high edge of the friction body is chamfered with a radius of 10mm, and the friction body is further provided with a heat dissipation through hole with a diameter of 14 mm. The joint length of the three friction blocks 2 in the first friction unit 2a and the corresponding three friction blocks 2 in the second friction unit 2b is at least 33-36 mm, and the three friction blocks 2 in the second friction unit 2b are respectively arranged in a way of being abutted to the corresponding three friction blocks 2 in the first friction unit 2 a. When having realized the effective friction area of increase clutch blocks 2, need not increase and prevent the revolving stage and carry on spacingly.
The utility model provides an effective friction area of I-D type forked tail steel backing brake block has reached 346cm 2 Far larger than the conventional brake pad by 280-300 cm 2 The effective friction area of. And simultaneously, the utility model provides an I-D type forked tail steel backingThe heat dissipation capability of the brake pad is also obviously superior to that of the traditional I-D type dovetail steel backing brake pad.
The utility model provides a highest temperature of brake block when braking and the highest temperature of traditional brake block when braking are shown as table 1:
table 1.
From table 1 easily to see, the utility model provides a brake pad's highest temperature obviously is less than traditional brake pad, can reduce the frictional heat that produces when improving effective friction area, is life that can effectual extension brake pad. And, can see the utility model provides a brake pad is along with the promotion of the speed of a motor vehicle, and the temperature rise range is littleer, consequently can demonstrate by a contract the utility model provides a brake pad has better high-speed adaptability.
As a further improvement, the upper end surface of the steel backing base body 1 is provided with a plurality of mounting grooves 12, the lower end surface of the steel backing base body 1 is provided with a plurality of fixing grooves 13 concentric with the mounting grooves 12, the fixing grooves 13 are communicated with the mounting grooves 12 through pin holes, the friction block 2 is adapted and mounted in the mounting groove 12 through a detachable claw-shaped disc spring 3, the pin 23 penetrates through the pin holes and extends into the fixing grooves 13, and one end of the pin 23, far away from the friction body, is clamped through a disc spring 4 adapted to the fixing grooves 13.
As shown in fig. 5 to 7, in the conventional brake pad, the inner ring 1a of the disc spring protrudes toward one side, the contact area between the disc spring and the frame 22 is small, and the disc spring is engaged with the frame 22 under the action of high pressure generated by a small high pressure area, so that the frame 22 is damaged, the circumferential adjustment capability of the disc spring is reduced, the brake pad is always in an inclined state, and further eccentric wear is aggravated. Therefore, as further improvement, the mounting groove 12 is 1-3 mm deep, the claw-shaped disc spring 3 with an inner groove is detachably arranged in the mounting groove 12, and a steel back ball socket is further arranged in the mounting groove 12. As shown in fig. 7, the claw-shaped disc spring 3 includes a mounting ring 31, the mounting ring 31 is adapted to the mounting groove 12, a plurality of sector plates 32 are fixedly arranged on the inner ring 1a of the mounting ring 31 in a circumferential array, and the short arc edges 11b of the sector plates 32 are adapted to the maximum outer diameter of the pin 23. And the upper end surface of the arc plate 32 is flush with the lower end surface of the framework 22. The upper end surface of the sector arc plate 32 is in a shape matched with the lower end surface of the framework 22, so that the contact area between the claw-shaped disc spring 3 and the framework 22 can be effectively increased, and the pressure is smaller under the action of the same brake clamping force; meanwhile, the plurality of arc plates 3232 are fixedly arranged on the circumference of the inner ring 1a of the mounting ring 31 in a circumferential array mode, so that the rigidity of the inner ring 1a structure can be reduced, the elastic capacity of the inner ring 1a structure is enhanced, through the design, the maximum deformation of each arc plate 32 of the inner ring 1a can reach 1mm, and the phenomenon that the inner ring 1a structure is embedded into the framework 22 under high pressure to damage the structure of the framework 22 and cause structural deflection is avoided.
Preferably, the thickness of the arc plate 32 is 0.8 mm.
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 (7)
1. An I-D type dovetail steel backing brake pad without a rotation-proof table is applied to a motor train unit with a speed grade of 200-250 km/h, and comprises a steel backing base body, wherein the edge of the outer contour of the steel backing base body comprises a long arc edge and a short arc edge which is in the same direction as the long arc edge and is arranged at an interval, the left ends of the long arc edge and the short arc edge are connected through a first straight edge, the first straight edge is respectively vertical to the long arc edge and the short arc edge, the right ends of the long arc edge and the short arc edge are connected through a second straight edge, one side of the second straight edge, which is close to the long arc edge, is subjected to chamfering treatment, and the I-D type dovetail steel backing brake pad is characterized in that,
the friction units are arranged on the upper end surface of the steel backing base body and comprise a first friction unit, a second friction unit and a third friction unit, each friction unit comprises three friction blocks, and each friction block is formed by sintering a regular-quadrilateral prismatic friction body, a framework and pins;
the three friction blocks of the first friction unit are sequentially arranged on one side, close to the first straight edge, of the steel backing base body in a stepped mode, and the friction blocks of the first friction unit deflect 10-15 degrees compared with the first straight edge;
the second friction unit is arranged on one side, away from the first straight edge, of the first friction unit, and three friction blocks in the second friction unit are respectively attached to three corresponding friction blocks in the first friction unit;
the three clutch blocks of third friction unit be down "article style of calligraphy" set up in the right side of second friction unit, the three clutch blocks of third friction unit two liang each other paste and lean on the setting.
2. The I-D type dovetail steel backing brake pad without the anti-rotation platform as claimed in claim 1, wherein the side length of the friction body is 48mm, the high edge of the friction body is chamfered with a radius of 10mm, and the friction body is further provided with a heat dissipation through hole with a diameter of 14 mm.
3. The I-D type dovetail steel backing brake pad without a turntable as claimed in claim 1, wherein the upper surface of the steel backing base body is formed with a plurality of mounting grooves, the lower surface of the steel backing base body is formed with a plurality of fixing grooves concentric with the mounting grooves, the fixing grooves are communicated with the mounting grooves through pin holes, the friction block is fitted into the mounting grooves through a detachable claw-shaped disc spring, the pin penetrates through the pin hole and extends into the fixing grooves, and one end of the pin, which is far away from the friction body, is clamped through a disc spring fitted into the fixing grooves.
4. The I-D dovetail steel backing brake pad without the anti-rotation platform as claimed in claim 3, wherein the mounting groove is 1-3 mm deep, and a steel backing ball socket is further arranged in the mounting groove;
the depth of the fixed groove is 4-6 mm;
one side of the framework, which is close to the mounting groove, is provided with a ball protrusion matched with the steel back ball socket in shape, and the ball protrusion and the steel back ball socket are arranged at an interval of 0.6-1.2 mm.
5. The I-D type dovetail steel backing brake pad without a defense sector as claimed in claim 4, wherein the claw-shaped disk spring comprises a mounting ring, the mounting ring is adapted to the mounting groove, a plurality of sector plates are fixedly arranged on the inner ring circumference array of the mounting ring, the short arc edge of each sector plate is adapted to the maximum outer diameter of the spherical protrusion, and the upper end surface of each sector plate is flush attached to the lower end surface of the framework.
6. The I-D type dovetail steel backing brake pad without a protective turntable of claim 5, wherein the thickness of the sector arc plate is 0.8 mm.
7. The I-D type dovetail steel backing brake pad without the anti-rotation platform of claim 1, wherein three friction blocks in the third friction unit are all deflected by 35-55 degrees compared with the first straight edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220998142.1U CN217056100U (en) | 2022-04-27 | 2022-04-27 | I-D type forked tail steel backing brake lining of no revolving stage of preventing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220998142.1U CN217056100U (en) | 2022-04-27 | 2022-04-27 | I-D type forked tail steel backing brake lining of no revolving stage of preventing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217056100U true CN217056100U (en) | 2022-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220998142.1U Active CN217056100U (en) | 2022-04-27 | 2022-04-27 | I-D type forked tail steel backing brake lining of no revolving stage of preventing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217056100U (en) |
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2022
- 2022-04-27 CN CN202220998142.1U patent/CN217056100U/en active Active
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