CN217056097U - Powder metallurgy brake lining for dovetail type high-speed motor train unit - Google Patents
Powder metallurgy brake lining for dovetail type high-speed motor train unit Download PDFInfo
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- CN217056097U CN217056097U CN202123160214.XU CN202123160214U CN217056097U CN 217056097 U CN217056097 U CN 217056097U CN 202123160214 U CN202123160214 U CN 202123160214U CN 217056097 U CN217056097 U CN 217056097U
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Abstract
The utility model discloses a high-speed EMUs of swallow-tailed type are with powder metallurgy brake lining, include: the dovetail steel back is characterized in that a plurality of first mounting grooves are formed in the surface of one end of the dovetail steel back, a plurality of second mounting grooves concentric with the first mounting grooves are formed in the surface of one side, away from the first mounting grooves, of the dovetail steel plate, disc springs are detachably arranged in the first mounting grooves, snap springs are detachably arranged in the second mounting grooves, and the first mounting grooves are communicated with the second mounting grooves through pin holes; the friction unit comprises a plurality of friction blocks with the same structure, the friction blocks are detachably arranged on the back of the dovetail steel through the disc springs and the snap springs, the friction blocks are in a long octagonal prism shape, and the friction blocks are positioned on the surface of the same side with the first mounting groove; and the anti-rotation unit is arranged on the surface of the dovetail steel back and is positioned between the friction blocks. Compare the brake lining of traditional regular hexagon or regular triangle friction block, the utility model discloses the effectual friction area that has increased has improved brake lining braking effect and life.
Description
Technical Field
The utility model relates to a motor car braking accessory field especially relates to a high-speed EMUs of swallow-tailed type are with powder metallurgy brake lining.
Background
The brake pad for the high-speed motor train unit has the main factors that the performance of the brake pad is influenced due to the fact that friction bodies crack, break, soften and wear are increased under the action of thermal stress due to the accumulation of heat in the braking process. The brake pressure is uniformly distributed, the friction temperature is reduced, and the method is an effective way for prolonging the service life of the powder metallurgy brake pad for the high-speed motor train unit. At present, triangular friction body arrangement, regular hexagon and inclined hexagon friction body arrangement are common. After the structure is applied by engineering, the following problems exist:
1. the shape of the friction body is usually irregular and cannot be well matched with the outline of the steel backing, so that the whole steel backing is difficult to be arranged fully, and a larger friction area cannot be ensured;
2. due to the irregular friction bodies and the arrangement form, all areas are stressed unevenly and fluctuate greatly in the braking process, so that friction heat is unevenly distributed and eccentric wear in different degrees is caused, the service life of the brake pad is prolonged, and the stable running of a train is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a high-speed EMUs of swallow-tailed type are with powder metallurgy brake lining, the utility model discloses a realize like this:
a powder metallurgy brake lining for a dovetail type high-speed motor train unit comprises:
the dovetail steel back is characterized in that a plurality of first mounting grooves are formed in the surface of one end of the dovetail steel back, a plurality of second mounting grooves concentric with the first mounting grooves are formed in the surface of one side, away from the first mounting grooves, of the dovetail steel plate, disc springs are detachably arranged in the first mounting grooves, snap springs are detachably arranged in the second mounting grooves, and the first mounting grooves are communicated with the second mounting grooves through pin holes;
the friction unit comprises a plurality of friction blocks with the same structure, the friction blocks are detachably arranged on the back of the dovetail steel through the disc spring and the clamp spring, the friction blocks are in a long octagonal prism shape, and the friction blocks are positioned on the surface of the first mounting groove on the same side;
and the anti-rotation unit is arranged on the surface of the dovetail steel back and is positioned between the friction blocks.
As a further improvement, the front view projection of the dovetail steel back is in a special-shaped dovetail shape, the front view projection of the special-shaped dovetail shape comprises a wide edge, a narrow edge, an arc edge and a special-shaped edge, the wide edge and the narrow edge are connected with each other through the arc plate and the special-shaped edge, and the wide edge and the narrow edge are parallel to each other;
the friction unit includes nine friction blocks, the friction unit includes:
the first friction unit comprises three friction blocks arranged on one side, close to the wide edge, of the dovetail steel back, long edges of the three friction blocks of the first friction unit point to the narrow edge along the wide edge, and the three friction blocks of the first friction unit are sequentially arranged at intervals along the arc edge point to the special-shaped edge;
the second friction unit comprises three friction blocks arranged on one side, far away from the wide edge, of the first friction unit, long edges of the three friction blocks of the second friction unit point to the narrow edge along the wide edge, and the three friction blocks of the second friction unit are sequentially arranged in a close fit manner along the arc-shaped edge and point to the special-shaped edge;
the third friction unit comprises two friction blocks arranged on one side, far away from the wide edge, of the second friction unit, long edges of the two friction blocks of the third friction unit point to the arc-shaped edge along the special-shaped edge, one short edge of the two friction blocks of the third friction unit is close to the special-shaped edge, and the two friction blocks of the third friction unit are attached to each other;
the fourth friction unit comprises one friction block which is arranged on one side, far away from the special-shaped edge, of the friction block, close to the third friction unit, of the third friction unit, and the long edge of one friction block of the third friction unit is directed to the short edge along the wide edge.
As a further improvement, the rotation preventing unit includes:
the first anti-rotation unit is arranged between the first friction unit and the second friction unit and comprises two rectangular first anti-rotation tables, and each side of each first anti-rotation table is tightly attached to any four adjacent friction blocks in the first friction unit and the second friction unit;
the second prevents changeing the unit, set up in second friction unit, third friction unit and between the arc limit, the second prevents changeing the second that the unit includes a right angle trapezoidal form and prevents the revolving stage, the second prevents that the lower bottom and the right angle waist of revolving stage hug closely respectively second friction unit with third friction unit, the second prevents that the oblique waist of revolving stage is close to the arc limit.
As further improvement, the clutch blocks include the skeleton, the pin has set firmly on the skeleton, the skeleton is kept away from one side surface sintering of pin is provided with the friction body, the pin passes through the pin hole runs through forked tail steel sheet and in the second mounting groove with the jump ring cooperation is fastened.
As a further improvement, the first mounting groove specifically includes a ball groove portion, an opening of the ball groove portion extends outward to form a disc groove portion, and the disc spring is clamped in the disc groove portion.
As a further improvement, one side of the framework, which is close to the dovetail steel back, is also provided with a ball head part, the ball head part is matched with the ball groove part, and the ball head part is clamped with the inner ring of the disk spring.
The beneficial effects of the utility model reside in that:
1. through the prism form that changes the block shape on the brake lining into long octagon, compare traditional regular hexagon or the prismatic block of friction of regular triangle, the utility model provides an area of friction of its frictional body of brake lining has improved about 15%, and area of friction is bigger, and the braking load of block of friction in the unit area is littleer, the effectual life who prolongs the brake lining.
2. Through setting up the friction block of long octagon prism form, when having improved the frictional area, avoided hugging closely completely between the friction body and do not have the heat dissipation clearance, do not influence the radiating efficiency of friction block under the prerequisite of increase frictional area.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of the present invention in a top view.
Fig. 3 is another schematic structural diagram of the present invention in a top view.
Fig. 4 is a schematic diagram of the explosion structure of the present invention.
Fig. 5 is the overall structure schematic diagram of the dovetail steel backing of the present invention.
Fig. 6 is a schematic view of the whole structure of the present invention viewed from the lower view angle.
Fig. 7 is a schematic view of the overall structure of the friction block of the present invention.
Detailed Description
To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, 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" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
A powder metallurgy brake lining for a dovetail type high-speed motor train unit comprises:
the dovetail steel back 1 is characterized in that a plurality of first mounting grooves 11 are formed in the surface of one end of the dovetail steel back 1, a plurality of second mounting grooves 12 concentric with the first mounting grooves 11 are formed in the surface, away from the first mounting grooves 11, of the dovetail steel plate, disc springs 101 are detachably arranged in the first mounting grooves 11, snap springs 102 are detachably arranged in the second mounting grooves 12, and the first mounting grooves 11 are communicated with the second mounting grooves 12 through pin holes 11;
the friction unit 2 comprises a plurality of friction blocks 201 with the same structure, the friction blocks 201 are detachably arranged on the dovetail steel back 1 through the disc spring 101 and the clamp spring 102, the friction blocks 201 are in a long octagonal prism shape, and the friction blocks 201 are located on the surface on the same side as the first mounting groove 11;
and the anti-rotation unit 3 is arranged on the surface of the dovetail steel back 1 and is positioned between the friction blocks 201.
The first embodiment,
In the present embodiment, the dovetail steel back 1 is a conventional standard dovetail steel back 1, and the friction unit 2 includes nine friction blocks 201 similar to the brake pad of the regular hexagon friction body 2012.
As a further improvement, the front view projection of the dovetail steel back 1 is in a special-shaped dovetail shape, the front view projection of the special-shaped dovetail shape comprises a wide edge, a narrow edge, an arc edge and a special-shaped edge, the wide edge and the narrow edge are connected with each other through the arc plate and the special-shaped edge, and the wide edge and the narrow edge are parallel to each other;
the friction unit 2 includes:
the first friction unit 21 comprises three friction blocks 201 arranged on one side, close to the wide side, of the dovetail steel back 1, long sides of the three friction blocks 201 of the first friction unit 21 point to the narrow side along the wide side, and the three friction blocks 201 of the first friction unit 21 are sequentially arranged at intervals along the arc-shaped side to point to the special-shaped side;
the second friction unit 22, the second friction unit 22 includes three friction blocks 201 disposed on one side of the first friction unit 21 away from the wide side, the long sides of the three friction blocks 201 of the second friction unit 22 point to the narrow side along the wide side, and the three friction blocks 201 of the second friction unit 22 are sequentially arranged along the arc-shaped side and point to the special-shaped side in a close fit manner;
a third friction unit 23, wherein the third friction unit 23 includes two friction blocks 201 disposed on one side of the second friction unit 22 away from the wide side, long sides of the two friction blocks 201 of the third friction unit 23 point to the arc-shaped side along the special-shaped side, one of short sides of the two friction blocks 201 of the third friction unit 23 is close to the special-shaped side, and the two friction blocks 201 of the third friction unit 23 are attached to each other;
a fourth friction unit 24, wherein the fourth friction unit 24 includes one of the friction blocks 201 disposed at a side of the third friction unit 23 close to the one of the friction blocks 201 of the third friction unit 23 far from the profiled edge, and a long side of the one of the friction blocks 201 of the third friction unit 23 is directed to the short side along the wide side.
As a further improvement, the rotation prevention unit 3 includes:
a first rotation prevention unit 31 disposed between the first friction unit 21 and the second friction unit 22, wherein the first rotation prevention unit 31 includes two rectangular first rotation prevention tables, and each side of the first rotation prevention table is tightly attached to any four adjacent friction blocks 201 in the first friction unit 21 and the second friction unit 22;
the second prevents changeing unit 32, set up in second friction unit 22, third friction unit 23 and between the arc limit, the second prevents changeing unit 32 and prevents the revolving stage including the second of a right angle trapezoidal form, the second prevents that the lower bottom and the right angle waist of revolving stage are hugged closely respectively second friction unit 22 with third friction unit 23, the second prevents that the oblique waist of revolving stage is close to the arc limit.
Further, in order to prevent the rotation prevention unit 3 from contacting the wheel body during the braking process, the rotation prevention unit 3 is lower than the friction unit 2.
As a further improvement, the friction block 201 includes a skeleton 2011, a pin 2013 is fixedly arranged on the skeleton 2011, the skeleton 2011 is far away from a friction body 2012 is arranged on the surface of one side of the pin 2013 in a sintering manner, and the pin 2013 penetrates through the dovetail steel plate through the pin hole 11 and is matched and fastened with the snap spring 102 in the second mounting groove 12.
As a further improvement, the first mounting groove 11 specifically includes a ball groove portion 112, an opening of the ball groove portion 112 extends outwards to form a disc groove portion 113, and the disc spring 101 is clamped in the disc groove portion 113.
As a further improvement, a ball head portion 2014 is further disposed on one side of the skeleton 2011 close to the dovetail steel back 1, the ball head portion 2014 is matched with the ball groove portion 112, and the ball head portion 2014 is clamped to the inner ring of the disc spring 101.
The friction area of the brake pad of the conventional regular hexagonal friction block 201 is about 288-292 mm 2 The friction area of the brake pad provided by this embodiment is about 330-340 mm 2 The lifting rate is about 14-16%.
Example II,
On the basis of embodiment one, for the braking performance of better improvement brake lining, it is specific, 1 ~ 3mm of belleville spring 101 mounting groove depth, 4 ~ 6mm of jump ring 102 mounting groove depth, bulb portion 2014 with be equipped with 0.6 ~ 1.2 mm's clearance between the ball groove portion 112, skeleton 2011 with the surface of forked tail steel back of the body 1 has 0.8 ~ 1.5 mm's clearance. Wherein, ball head portion 2014 with set up the clearance between the ball groove, and skeleton 2011 with set up the clearance between the forked tail steel backing 1, guarantee that friction block 201 has certain adjustment clearance in the vertical direction.
Right on the friction and wear test bench the utility model provides a long octagon brake lining and traditional regular hexagon clutch blocks brake lining and regular triangle brake blocks brake lining carry out the friction and wear capability test under the 350km/h speed, get ten average values of group's experimental result, the test result is as shown in table 1.
TABLE 1 Friction and wear performance comparison table for brake pads of long octagonal friction blocks and traditional brake pads
Can know from table 1, along with the increase of experiment number of times, its coefficient of friction of brake lining of traditional regular hexagon and regular triangle clutch blocks appears obviously descending, and the utility model provides a brake lining though corresponding decline appears and the decline rate obviously is less than traditional brake lining, can prove the utility model provides a brake lining of long octagonal clutch blocks and arrangement can effectively improve the life and the friction efficiency of brake lining.
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 (5)
1. The utility model provides a powder metallurgy brake lining for high-speed EMUs of dovetail type which characterized in that includes:
the dovetail steel back is characterized in that a plurality of first mounting grooves are formed in the surface of one end of the dovetail steel back, a plurality of second mounting grooves concentric with the first mounting grooves are formed in the surface of one side, away from the first mounting grooves, of the dovetail steel back, disc springs are detachably arranged in the first mounting grooves, snap springs are detachably arranged in the second mounting grooves, and the first mounting grooves are communicated with the second mounting grooves through pin holes;
the friction unit comprises a plurality of friction blocks with the same structure, the friction blocks are detachably arranged on the back of the dovetail steel through the disc spring and the clamp spring, the friction blocks are in a long octagonal prism shape, and the friction blocks are positioned on the surface of the first mounting groove on the same side;
the anti-rotation unit is arranged on the surface of the dovetail steel back and is positioned between the friction blocks;
the front view projection of the dovetail steel back is in a special-shaped dovetail shape, the front view projection of the special-shaped dovetail shape comprises a wide edge, a narrow edge, an arc edge and a special-shaped edge, the wide edge and the narrow edge are connected with each other through the arc edge and the special-shaped edge, and the wide edge and the narrow edge are parallel to each other;
the friction unit includes nine friction blocks, the friction unit includes:
the first friction unit comprises three friction blocks arranged on one side, close to the wide edge, of the dovetail steel back, long edges of the three friction blocks of the first friction unit point to the narrow edge along the wide edge, and the three friction blocks of the first friction unit are sequentially arranged at intervals along the arc-shaped edge and point to the special-shaped edge;
the second friction unit comprises three friction blocks arranged on one side, far away from the wide edge, of the first friction unit, long edges of the three friction blocks of the second friction unit point to the narrow edge along the wide edge, and the three friction blocks of the second friction unit are sequentially arranged in a close fit manner along the arc-shaped edge and point to the special-shaped edge;
the third friction unit comprises two friction blocks arranged on one side, far away from the wide edge, of the second friction unit, long edges of the two friction blocks of the third friction unit point to the arc-shaped edge along the special-shaped edge, one short edge of the two friction blocks of the third friction unit is close to the special-shaped edge, and the two friction blocks of the third friction unit are attached to each other;
and the fourth friction unit comprises one friction block which is arranged on one side, far away from the special-shaped edge, of the friction block close to the third friction unit, and the long edge of the friction block of the third friction unit is directed to the short edge along the wide edge.
2. The powder metallurgy brake lining for the dovetail type high-speed motor train unit according to claim 1, wherein the anti-rotation unit comprises:
the first anti-rotation unit is arranged between the first friction unit and the second friction unit and comprises two rectangular first anti-rotation tables, and each side of each first anti-rotation table is tightly attached to any four adjacent friction blocks in the first friction unit and the second friction unit;
the second prevents changeing the unit, set up in second friction unit, third friction unit and between the arc limit, the second prevents changeing the second that the unit includes a right angle trapezoidal form and prevents the revolving stage, the second prevents that the lower bottom and the right angle waist of revolving stage hug closely respectively second friction unit with third friction unit, the second prevents that the oblique waist of revolving stage is close to the arc limit.
3. The powder metallurgy brake lining for the dovetail type high-speed motor train unit according to claim 1, wherein the friction block comprises a framework, a pin is fixedly arranged on the framework, a friction body is arranged on the surface of one side, away from the pin, of the framework in a sintered mode, and the pin penetrates through the dovetail steel backing through the pin hole and is matched and fastened with the clamp spring in the second mounting groove.
4. The powder metallurgy brake lining for the dovetail type high-speed motor train unit according to claim 3, wherein the first mounting groove comprises a ball groove portion, an opening of the ball groove portion extends outwards to form a disc groove portion, and the disc spring is clamped in the disc groove portion.
5. The powder metallurgy brake lining for the dovetail type high-speed motor train unit according to claim 4, wherein a ball head portion is further arranged on one side, close to the dovetail steel backing, of the framework, the ball head portion is matched with the ball groove portion, and the ball head portion is clamped to an inner ring of the disc spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123160214.XU CN217056097U (en) | 2021-12-15 | 2021-12-15 | Powder metallurgy brake lining for dovetail type high-speed motor train unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123160214.XU CN217056097U (en) | 2021-12-15 | 2021-12-15 | Powder metallurgy brake lining for dovetail type high-speed motor train unit |
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| Publication Number | Publication Date |
|---|---|
| CN217056097U true CN217056097U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123160214.XU Active CN217056097U (en) | 2021-12-15 | 2021-12-15 | Powder metallurgy brake lining for dovetail type high-speed motor train unit |
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| CN (1) | CN217056097U (en) |
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2021
- 2021-12-15 CN CN202123160214.XU patent/CN217056097U/en active Active
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