CN107120368B - Floating caliper type radial double-push-rod air pressure disc brake - Google Patents
Floating caliper type radial double-push-rod air pressure disc brake Download PDFInfo
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- CN107120368B CN107120368B CN201710372746.9A CN201710372746A CN107120368B CN 107120368 B CN107120368 B CN 107120368B CN 201710372746 A CN201710372746 A CN 201710372746A CN 107120368 B CN107120368 B CN 107120368B
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- 230000007246 mechanism Effects 0.000 claims description 19
- 230000007704 transition Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000003754 machining Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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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
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
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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
- F16D2121/00—Type of actuator operation force
- F16D2121/14—Mechanical
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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
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
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Abstract
The invention provides a floating caliper type radial double-push-rod air pressure disc brake which comprises a caliper body, a rotating shaft assembly, two friction blocks, a brake disc, a pressure plate and a bracket, wherein the caliper body is provided with a first end and a second end; the clamp body is of an integrally formed structure and comprises a first cavity and a second cavity, the first cavity and the second cavity are communicated in the horizontal axis direction, and a pressing plate fixing piece is arranged in the vertical radial direction of the second cavity; the caliper body and the support form a floating caliper type structure through a guide pin, the rotating shaft assembly is installed in a second cavity of the caliper body, the two friction blocks are installed on the support, the friction blocks are arranged in the first cavity, the two braking surfaces of the brake disc are respectively contacted with the two friction blocks, the pressing plate is installed on the pressing plate fixing piece, and the pressing plate compresses the friction blocks through the pressure springs. This radial double push rod air pressure disc brake of floating caliper formula designs the caliper body into integrated into one piece structure, has reduced the part number of current split type caliper body to each parts equipment, and then has alleviateed the weight of stopper, has improved the intensity and the rigidity of stopper simultaneously.
Description
Technical Field
The invention belongs to the technical field of automobile parts, and particularly relates to a floating caliper type radial double-push-rod air pressure disc brake.
Background
The pressure of rapidly expanding urban traffic is increasing and public transport requires more passengers to be transported in a shorter turnaround time, thus the mass-capacity, low-emission, comfortable-to-ride low-floor urban buses are rapidly growing. With the popularization and application of new energy vehicles, air suspension rear axles are widely arranged in the traveling vehicles operated on roads. In recent years, air disc brakes have been widely used because of their advantages over drum brakes, and disc brakes have been used from front and rear drums to front and rear axles.
In order to meet the use requirements of middle/rear axles of low-floor buses, station wagons and medium/heavy commercial vehicles with air suspensions, radial disc brakes with parking spring air chambers are developed and applied, and the problem that the axial disc brakes cannot be spatially arranged on the rear axles is solved.
However, the existing radial air pressure disc brake has the following defects:
1. the brake has larger volume and heavier weight, is limited by narrow space of the rear axle, leads to limited application range and can not meet the requirement of light weight of the whole vehicle.
2. Brake calliper is mostly complicated components of a whole that can function independently structure, and part quantity is many, is unfavorable for processing and assembly, and bolted connection position has the risk of inefficacy, and sealed face is more.
3. The parts of the self-adjusting structure for the internal clearance of the brake are scattered, which is not favorable for assembly and performance control and is inconvenient for maintenance.
4. The split structure of the brake is complex, the rigid deformation of the caliper body is large, and the stable output of the braking torque is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the existing radial air pressure disc brake and provides the radial air pressure disc brake which is relatively simple in structure, light in weight, large in braking torque, stable in performance and convenient to maintain.
The technical scheme of the invention provides a floating caliper type radial double-push-rod air pressure disc brake, which comprises a caliper body, a rotating shaft assembly, two friction blocks, a brake disc, a pressure plate and a bracket, wherein the caliper body is provided with a plurality of radial double-push-rod air pressure disc brake pads;
the caliper body is of an integrally formed structure and comprises a first cavity for accommodating a brake disc and a second cavity for accommodating a rotating shaft assembly, the first cavity and the second cavity are communicated in the horizontal axis direction, an air chamber mounting hole is formed in the vertical radial direction of the second cavity, and a pressure plate fixing piece is arranged in the vertical radial direction of the first cavity;
the caliper body and the support form a floating caliper type structure through a guide pin, the rotating shaft assembly is installed in a second cavity of the caliper body, the two friction blocks are installed on the support and are arranged in the first cavity, two braking surfaces of the brake disc are respectively contacted with the two friction blocks, the pressing plate is installed on the pressing plate fixing piece, and the pressing plate is pressed on the upper surface of the friction blocks through a pressure spring.
Furthermore, the rotating shaft assembly comprises a pressure arm, a fulcrum cylinder, a reference seat, a return spring, an adjusting mechanism, a driving rotating shaft, a screw rod, a gear, a bottom cover, a pushing plate, a driven rotating shaft and a fixing clamp;
the pressure arm is connected with the driving rotating shaft through a pin pulling driving adjusting mechanism, the adjusting mechanism is arranged on the driving rotating shaft and can rotate around the driving rotating shaft, one end of the fixing clamp is arranged on the pressure arm, and the other end of the fixing clamp is fixed on the bottom cover.
Furthermore, the pressure arm comprises a pressure arm bearing part and a rotating part, one end of the pressure arm bearing part is provided with a pressure arm ball socket, the pressure arm ball socket is just opposite to the air chamber mounting hole, the other end of the pressure arm bearing part is provided with a first fixing part and a second fixing part, the rotating part comprises an inner cylindrical surface and an outer cylindrical surface, the first fixing part and the second fixing part are fixedly connected with the middle parts of two side walls which are parallel to the symmetry axis of the rotating part on the rotating part respectively, the center of the inner cylindrical surface and the center of the outer cylindrical surface are eccentrically arranged, and the center of the inner cylindrical surface is close to the pressure arm ball socket relative to the center of the outer cylindrical surface.
Furthermore, the first fixing part and the second fixing part of the force bearing part of the pressure arm are connected through an arc transition surface, and the arc transition surface and the inner cylindrical surface of the rotating part form a hollow cylinder.
Furthermore, the upper surface and the lower surface of the inner part of the second cavity are symmetrically provided with two reference seat guide surfaces respectively, two machining holes are arranged on the side wall of the front end of the second cavity in parallel, the two machining holes are communicated with the inner part of the second cavity, and two annular positioning surfaces are machined through reverse boring of the machining holes.
The fixing clamp comprises two oppositely arranged clamping plates, the upper ends of the two clamping plates are connected through two connecting plates arranged at opposite intervals, clamping hooks are arranged at the lower ends of the two clamping plates, the two connecting plates are respectively fixed with two sides of the pressure arm, and the clamping hooks are fixed on the bottom cover.
Further, the first chamber corner has two superimposed chamfers.
Furthermore, the pressing plate fixing part comprises a tail boss, a head groove and a fixing buckle, the tail boss and the head groove are arranged on the upper surface of the first cavity of the caliper body, one end of the pressing plate is inserted into the head groove, and the other end of the pressing plate is fixedly connected with the tail boss through the fixing buckle.
Furthermore, a first connecting part and a second connecting part are respectively arranged at two ends of the pressing plate, the first connecting part is inserted into the head part groove, an open groove is arranged on the second connecting part, and the opening size of the open groove in the axial direction of the pressing plate is not smaller than the width of the tail boss; the inner side of the tail boss is provided with a clamping groove, the open slot is sleeved in the tail boss, one side wall of the open slot is embedded in the clamping groove, and the open slot and the outer side of the tail boss are fixed through a fixing buckle.
Furthermore, the fixing buckle comprises a W-shaped abutting-buckling part and a stopping part which is connected with two sides of the W-shaped abutting-buckling part and extends outwards, each side wall of the W-shaped abutting-buckling part is abutted against the outer side of the tail boss and the inner side wall of the open slot respectively, and the stopping part is stopped on the pressing plate.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the floating caliper type radial double-push-rod air pressure disc brake provided by the invention, the caliper body is designed into an integrally formed structure, so that the number of parts for assembling all parts in the existing split structure is reduced, the weight of the brake is further reduced, and the strength and the rigidity of the brake are improved.
(2) The floating caliper type radial double-push-rod air pressure disc brake provided by the invention has the advantages that the limiting function of a reference seat in the rotating shaft assembly is added in the caliper body, so that the mechanical efficiency loss of the gap self-regulating mechanism of the rotating shaft assembly is reduced, the stable work of the rotating shaft assembly is ensured, the braking stability is improved, and the service life of the brake is prolonged.
(3) The pressure arm structure of the rotating shaft assembly in the floating caliper type radial double-push-rod air pressure disc brake provided by the invention is more reasonable in design, reduces the mechanical efficiency loss caused by stress deformation, and ensures the output of larger braking torque.
(4) The floating caliper type radial double-push-rod air pressure disc brake provided by the invention reduces the mechanical processing procedures of the caliper body, reduces the processing cost of the caliper and enables the pressure plate to be more conveniently installed by changing the installation form of the pressure plate for limiting the friction block.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a floating caliper type radial double-push-rod air pressure disc brake of the present invention;
FIG. 2 is a top view of a caliper body of the floating caliper type radial double-push-rod air disc brake according to the present invention;
FIG. 3 is a side view of the caliper body of the floating caliper type radial dual push rod air disc brake of the present invention;
FIG. 4 is a cross-sectional view of a second chamber of the caliper body of the floating caliper radial dual pushrod air disc brake of the present invention;
FIG. 5 is a schematic structural diagram of a rotating shaft assembly in the floating caliper type radial double-push-rod air pressure disc brake of the present invention;
FIG. 6 isbase:Sub>A schematic cross-sectional view taken along the line A-A in FIG. 5;
FIG. 7 is a schematic structural diagram of a pressure arm in the floating caliper type radial double-push-rod air pressure disc brake of the present invention;
FIG. 8 is a schematic structural diagram of a fixing clip in the floating caliper type radial double-push-rod air pressure disc brake of the present invention;
FIG. 9 is a schematic structural diagram of a reference seat in the floating caliper type radial double-push-rod air pressure disc brake of the present invention;
FIG. 10 is a schematic view of the mounting structure of the pressure plate and the pressure plate fixing member in the floating caliper type radial double-push rod air pressure disc brake of the present invention;
FIG. 11 is a schematic structural diagram of a middle pressure plate of the floating caliper type radial double-push-rod air pressure disc brake of the present invention;
fig. 12 is a schematic structural diagram of a fixing buckle in the floating caliper type radial double-push-rod air pressure disc brake of the invention.
Description of reference numerals: 1. a rotating shaft assembly; 2. a caliper body; 3. a support; 4. a brake disc; 5. a friction block; 6. a first chamber; 7. pressing a plate; 8. a second chamber; 9. an air chamber mounting hole; 10. chamfering; 11. a reference seat guide surface; 12. machining a hole; 13. an annular limiting surface; 14. a tail boss; 15. a card slot; 16. a head groove; 17. a pressure arm; 18. an adjustment mechanism; 19. a driving rotating shaft; 20. a screw; 21. a gear; 22. a bottom cover; 23. a small retainer ring; 24. a push plate; 25. a return spring; 26. a driven shaft; 27. fixing the card; 28. a fulcrum cylinder; 29. a small needle roller pair; 30. a large needle roller pair; 31. a reference base; 32. pulling the pin; 33. a pressure arm ball socket; 34. a pressure arm bearing part; 35. a first fixed part; 36. an outer cylindrical surface; 37. an inner cylindrical surface; 38. a rotating part; 39. a second fixed part; 40. a circular arc transition surface; 41. a connecting plate; 42. a splint; 43. a hook; 44. a second connecting portion; 45. fixing the buckle; 46. an open slot; 47. a first connection portion; 48. a W-shaped abutting part; 49. a stopper portion; 50. and fixing the protrusion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, fig. 2 and fig. 3, the present embodiment provides a floating caliper type radial double-push rod air pressure disc brake, which includes a caliper body 2, a rotating shaft assembly 1, two friction blocks 5, a brake disc 4, a pressure plate 7 and a bracket 3; the caliper body 2 is of an integrally formed structure and comprises a first cavity 6 for accommodating the brake disc 4 and a second cavity 8 for accommodating the rotating shaft assembly 1, the first cavity 6 and the second cavity 8 are communicated in the horizontal axis direction, an air chamber mounting hole 9 is formed in the vertical radial direction of the second cavity 8, and a pressure plate fixing piece is arranged in the vertical radial direction of the first cavity 6; the caliper body 2 and the support 3 form a floating caliper type structure through a guide pin, the rotating shaft assembly 1 is installed in a second chamber 8 of the caliper body 2, the friction blocks 5 are installed on the support 3, the friction blocks 5 are arranged in a first chamber 6, two braking surfaces of the brake disc 4 are respectively contacted with the friction blocks 5, the pressing plate 7 is installed on the pressing plate fixing piece, and the pressing plate 7 is pressed on the upper surface of the friction blocks 5 through a pressure spring.
In the embodiment, an axial air pressure disc brake is used as a basis, the installation direction of an air chamber is adjusted to be radial from the axial direction, the air chamber is installed on the upper surface of a second chamber 8 of a caliper body 2, a push rod of the air chamber acts on a rotating shaft assembly 1 through an air chamber installation hole 9, the rotating shaft assembly 1 converts the thrust of the air chamber in the vertical direction into horizontal thrust, and therefore a friction block 5 is pushed to compress a brake disc 4. And the calliper body 2 is the integrated into one piece structure in this embodiment, and its atress condition is better, has avoided the problem that split type calliper connecting bolt became invalid, has reduced the part quantity of carrying out the equipment to each part in the split type calliper, and then has alleviateed the weight of stopper, and rigidity deformation is little, has improved the intensity and the rigidity of stopper, has improved the leakproofness of stopper simultaneously, avoids inside water and dust entering calliper, protects inside key part, improves the stopper life-span.
Detailed embodiment, as shown in fig. 5, 6, and 9, the rotating shaft assembly 1 includes a pressure arm 17, a fulcrum cylinder 28, a reference seat 31, a return spring 25, an adjusting mechanism 18, a driving rotating shaft 19, a screw 20, a gear 21, a bottom cover 22, a pushing plate 24, a driven rotating shaft 26, and a fixing clip 27; the fulcrum cylinder 28 is connected with the pressure arm 17 through a small needle roller pair 29, the pressure arm 17 is installed on a reference seat 31 through a large needle roller pair 30, the return spring 25 is located between the reference seat 31 and a bottom cover 22, the driving rotating shaft 19 and the driven rotating shaft 26 are respectively connected to two sides of the reference seat 31, the driving rotating shaft 19 and the driven rotating shaft 26 are connected through three gears 21 in a meshed mode, the driving rotating shaft 19 and the driven rotating shaft 26 are respectively connected with two screw rods 20, the end portion of each screw rod 20 penetrates through the bottom cover 22 and is connected to a push plate 24 through a small retainer ring 23, a shifting pin installation hole is formed in the pressure arm 17, a shifting pin 32 is installed in the shifting pin installation hole and is connected with an opening in the adjusting mechanism 18, the pressure arm 17 drives the adjusting mechanism 18 to rotate through the shifting pin 32 in the pushing rod action of an air chamber in the moving process, the adjusting mechanism 18 is arranged on the driving rotating shaft 19, the adjusting mechanism 18 and the driving rotating shaft 19 are connected through a torsional spring in an interference fit mode, when the shifting pin 32 rotates, certain displacement in the horizontal direction can drive the adjusting mechanism 18 to drive the horizontal displacement of the adjusting mechanism 18, the other end of the adjusting mechanism 18 to be fixedly clamped on the bottom cover 17 through a rotating shaft, and one end of the pressure arm 17 is rotatably clamped on the bottom cover 22, and the rotating shaft 27.
As shown in fig. 7, the pressure arm 17 includes a pressure arm bearing portion 34 and a rotating portion 38, one end of the pressure arm bearing portion 34 is provided with a pressure arm ball socket 33, the pressure arm ball socket 33 faces the air chamber mounting hole 9, the other end of the pressure arm bearing portion 34 is provided with a first fixing portion 35 and a second fixing portion 39, the rotating portion 38 includes an inner cylindrical surface 37 and an outer cylindrical surface 36, the first fixing portion 35 and the second fixing portion 39 are respectively fixedly connected with the middle portions of two side walls of the rotating portion 38 parallel to the symmetry axis of the rotating portion 38, the center of the inner cylindrical surface 37 and the center of the outer cylindrical surface 36 are eccentrically arranged, and the center of the inner cylindrical surface 37 is close to the pressure arm ball socket 33 relative to the center of the outer cylindrical surface 36; the first fixing part 35 and the second fixing part 39 of the pressure arm bearing part 34 are connected through an arc transition surface 40, and the arc transition surface 40 and the inner cylindrical surface 37 of the rotating part 38 form a hollow cylinder. The push rod of the air chamber exerts acting force on the pressure arm ball socket 33 and acts on the rotating part 38 through the pressure arm bearing part 34, and because the pressure arm bearing part 34 is respectively connected with two sides of the middle part of the rotating part 38 through the first fixing part 35 and the second fixing part 39, the first fixing part 35 and the second fixing part 39 disperse the acting force of the pressure arm bearing part 34 on two sides of the rotating part 38, compared with the existing connecting stress of the pressure arm bearing part and one side of the rotating part, the stress of the connecting part of the first fixing part 35 or the second fixing part 39 and the rotating part 38 is greatly reduced, thereby reducing the mechanical efficiency loss caused by stress deformation and ensuring the output of larger braking torque of the brake.
As shown in fig. 8, the fixing clip 27 includes two oppositely disposed clamping plates 42, the upper ends of the two clamping plates 42 are connected by two oppositely disposed connecting plates 41, an opening for the pressure arm 17 to pass through is formed by a space between the two clamping plates 42 and the two connecting plates 41, the pressure arm 17 passes through the opening, the two connecting plates 41 are respectively mounted on the rotating parts 38 at two sides of the pressure arm 17, the fulcrum cylinder 28, the reference seat 31 and the return spring 25 are clamped between the two clamping plates 42, the lower ends of the two clamping plates 42 are respectively provided with a hook 43, the hook 43 is fixed on the bottom cover 22, so that the fixing clip 27 connects and fixes the pressure arm 17, the fulcrum cylinder 28, the reference seat 31, the return spring 25, the adjusting mechanism 18, the driving rotating shaft 19, the screw 20, the gear 21, the bottom cover 22, the pushing plate 24 and the driven rotating shaft 26 as an assembly unit.
The brake working process of the brake is as follows: the push rod of the air chamber pushes the pressure arm 17 to rotate around the fulcrum column 28, the pressure arm 17 converts the vertical acting force of the air chamber into the horizontal thrust, the small roller pin pair 29 and the large roller pin pair 30 transmit the acting force, the reference seat 31 drives the driving rotating shaft 19, the driven rotating shaft 26 and the push plate 24 to move together, meanwhile, the return spring 25 between the reference seat 31 and the bottom cover 22 is compressed, and the friction block 5 is pushed to press the brake disc 4, so that the braking effect is completed; when the push rod of the air chamber is retracted, the reference seat 31 is jacked back under the action of the return spring 25, and the pressure arm 17 is restored.
The compensation working process of the brake is as follows: when the pressure arm 17 rotates, the shifting pin 32 connected with the pressure arm 17 moves back and forth at a certain angle to drive the adjusting mechanism 18 to rotate around the driving rotating shaft 19, and the driving rotating shaft 19 can only rotate in one direction due to the automatic adjusting characteristic of the adjusting mechanism 18, so that the rotating shaft assembly 1 has the function of automatic compensation of the abrasion clearance; when the friction block 5 is worn and a gap exists between the push plate 24 and the friction block 5, the compensation function is started, the upper shifting pin 32 of the pressure arm 17 drives the driving rotating shaft 19 to rotate, meanwhile, the driving rotating shaft 19 drives the driven rotating shaft 26 to synchronously rotate through the meshing transmission of the three gears 21, the two screw rods 20 which are respectively connected with the driving rotating shaft 19 and the driven rotating shaft 26 through threads are fixed on the push plate 24 through the small check rings 23, and when the driving rotating shaft 19 rotates, the screw rods 20 are restricted by the push plate 24 and cannot rotate, so that the rotary motion of the driving rotating shaft 19 and the driven rotating shaft 26 is converted into linear motion, and the compensation function is realized.
In addition, as shown in fig. 2, 3 and 4, two reference seat guide surfaces 11 are symmetrically arranged on the upper and lower surfaces inside the second chamber 8, the reference seat guide surfaces 11 are machined by the cutter head to extend into the second chamber 8 from the first chamber 6, and the upper and lower surfaces inside the second chamber 8 are machined, specifically, two reference seat guide surfaces 11 on the upper and lower surfaces inside the second chamber 8 are respectively arranged, and the reference seat guide surfaces 11 on the upper and lower surfaces are symmetrically arranged one by one, the machining positions of the four reference seat guide surfaces 11 correspond to the positions of four guide fixing surfaces (the contact surfaces for fixing with the caliper body on the reference seat, which belongs to the prior art) arranged on the reference seat 31 of the rotating shaft assembly 1, and compared with the conventional limiting surfaces machined by using the cutter head on the arc surfaces on both sides inside the second chamber 8, the structure and the machining mode of the reference seat guide surfaces 11 of the present embodiment are simpler and more stable, and effectively limit the deflection of the reference seat 31, and realize the linear guide function on the reference seat 31. And in order to guarantee that the spacing face that is used for the locating piece of fixed pivot assembly 1 can be processed smoothly in the second cavity 8 of the structure caliper body 2 of an organic whole, parallel arrangement has two processing holes 12, two on the front end lateral wall of second cavity 8 processing hole 12 with second cavity 8 is inside to communicate with each other, and has two annular locating surfaces 13 through processing hole 12 reverse boring processing, through two annular locating surfaces 13 fixed position piece, guarantees the locating piece at horizontal location size. Preferably, the first chamber 6 has two overlapped chamfers 10 at the corners, so as to prevent the first chamber 6 of the caliper body 2 from breaking due to stress concentration and the second chamber 8, thereby improving the strength of the caliper body 2 and further improving the strength of the brake.
During the actual operation of the brake, the friction block 5 will be subjected to a radial component of the acting force of the brake disc 4, and in order to avoid the friction block 5 from popping out and affecting the stability of the operation of the brake, the friction block 5 is pressed through the pressure plate 7 and the pressure plate fixing piece. As shown in fig. 3, 10, 11 and 12, the pressing plate fixing member includes a tail boss 14, a head groove 16 and a fixing buckle 45, the tail boss 14 and the head groove 16 are disposed on the upper surface of the first chamber 6 of the caliper body 2, two ends of the pressing plate 7 respectively have a first connecting portion 47 and a second connecting portion 44, the first connecting portion 47 is inserted into the head groove 16, the second connecting portion 44 is provided with an opening groove 46, and the opening size of the opening groove 46 in the axial direction of the pressing plate 7 is not smaller than the width of the tail boss 14; the inner side of the tail boss 14 is provided with a clamping groove 15, the open groove 46 is sleeved in the tail boss 14, one side wall of the open groove 46 is embedded in the clamping groove 15, and the open groove 46 and the outer side of the tail boss 14 are fixed through a fixing buckle 45. Specifically, the fixing buckle 45 includes a W-shaped abutting portion 48 and a stopping portion 49 connected to two sides of the W-shaped abutting portion 48 and extending outward, each sidewall of the W-shaped abutting portion 48 abuts against the outer side of the tail boss 14 and the inner sidewall of the opening groove 46, and the stopping portion 49 is stopped on the pressing plate 7. Because the W-shaped abutting part 48 of the pressing plate 7 abuts against the tail boss 14 and the open slot 46, the stopping part 49 of the pressing plate 7 is pressed on the pressing plate 7, and meanwhile, when the pressing plate 7 is under the action of the upward thrust of the friction block 5, the clamping slot 15 generates downward acting force on the pressing plate 7, so that the pressing plate 7 is limited on the caliper body 2 under the action of the stopping part 49 and the clamping slot 15, and meanwhile, the fixed buckle 48 is ensured not to fall off easily, and the brake is ensured to work normally; the fixing mode of the pressure plate overcomes the problem that the pin and the bolt slide or even fall off in the prior art; meanwhile, the clamping and processing cost of the calipers is reduced. Preferably, in order to enable the fixed buckle 45 to be connected with the pressing plate 7 more tightly, the W-shaped abutting portion 48 is symmetrically provided with the fixed protrusions 50 at two sides, the fixed protrusions 50 are made of rubber materials, and the gaps between the pressing plate 7 and two side walls of the W-shaped abutting portion 48 are filled with the fixed protrusions 50 made of elastic materials, so that the working position of the pressing plate 7 is guaranteed more effectively, the fixed protrusions 50 can also reduce the impact of continuous jumping of the pressing plate 7 on the fixed buckle 45, and the service life of the fixed buckle 45 is prolonged.
In conclusion, the floating caliper type radial double-push-rod air pressure disc brake provided by the invention has the advantages that the caliper body is designed into an integrally formed structure, the number of parts for assembling all parts in the existing split structure is reduced, the weight of the brake is further reduced, and the strength and the rigidity of the brake are improved.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (8)
1. The utility model provides a radial two push rod atmospheric pressure disc brake of floating caliper formula which characterized in that: comprises a caliper body (2), a rotating shaft assembly (1), two friction blocks (5), a brake disc (4), a pressure plate (7) and a bracket (3);
the caliper body (2) is of an integrally formed structure and comprises a first cavity (6) for accommodating the brake disc (4) and a second cavity (8) for accommodating the rotating shaft assembly (1), the first cavity (6) is communicated with the second cavity (8) in the horizontal axis direction, an air chamber mounting hole (9) is formed in the vertical radial direction of the second cavity (8), and a pressure plate fixing piece is formed in the vertical radial direction of the first cavity (6); the upper surface and the lower surface of the interior of the second chamber (8) are symmetrically provided with two reference seat guide surfaces (11), the side wall of the front end of the second chamber (8) is provided with two processing holes (12) in parallel, the two processing holes (12) are communicated with the interior of the second chamber (8), and two annular positioning surfaces (13) are processed through reverse boring of the processing holes (12);
the caliper body (2) and the support (3) form a floating caliper type structure through a guide pin, the rotating shaft assembly (1) is installed in a second cavity (8) of the caliper body (2), two friction blocks (5) are installed on the support (3), the friction blocks (5) are arranged in a first cavity (6), two braking surfaces of the brake disc (4) are respectively contacted with the two friction blocks (5), the pressing plate (7) is installed on the pressing plate fixing piece, and the pressing plate (7) is pressed tightly through a pressure spring on the upper surface of the friction blocks (5).
2. The floating caliper type radial double push rod air pressure disc brake as claimed in claim 1, characterized in that: the rotating shaft assembly (1) comprises a pressure arm (17), a fulcrum cylinder (28), a reference seat (31), a return spring (25), an adjusting mechanism (18), a driving rotating shaft (19), a screw rod (20), a gear (21), a bottom cover (22), a pushing plate (24), a driven rotating shaft (26) and a fixing clamp (27);
the supporting point cylinder (28) is connected with a pressure arm (17) through a small needle roller pair (29), the pressure arm (17) is installed on a reference seat (31) through a large needle roller pair (30), the return spring (25) is located between the reference seat (31) and a bottom cover (22), the driving rotating shaft (19) and the driven rotating shaft (26) are respectively connected to two sides of the reference seat (31), the driving rotating shaft (19) and the driven rotating shaft (26) are connected in a meshed mode through three gears (21), the driving rotating shaft (19) and the driven rotating shaft (26) are respectively connected with two screw rods (20), the end portion of each screw rod (20) penetrates through the bottom cover (22) and is connected to a pushing plate (24) through a small retainer ring (23), the pressure arm (17) drives an adjusting mechanism (18) to rotate through a pulling pin (32), the adjusting mechanism (18) is arranged on the driving rotating shaft (19) and can rotate around the driving rotating shaft (19), one end of the fixing clamp (27) is installed on the pressure arm (17), and the other end of the fixing clamp is fixed on the bottom cover (22); the fixing clamp (27) comprises two oppositely arranged clamping plates (42), the upper ends of the clamping plates (42) are connected through two connecting plates (41) which are oppositely arranged at intervals, clamping hooks (43) are arranged at the lower ends of the clamping plates (42), the two connecting plates (41) are respectively fixed with two sides of the pressure arm (17), and the clamping hooks (43) are fixed on the bottom cover (22).
3. The floating caliper type radial double push rod air pressure disc brake as claimed in claim 2, characterized in that: the pressure arm (17) comprises a pressure arm bearing portion (34) and a rotating portion (38), one end of the pressure arm bearing portion (34) is provided with a pressure arm ball socket (33), the pressure arm ball socket (33) is opposite to the air chamber mounting hole (9), the other end of the pressure arm bearing portion (34) is provided with a first fixing portion (35) and a second fixing portion (39), the rotating portion (38) comprises an inner cylindrical surface (37) and an outer cylindrical surface (36), the first fixing portion (35) and the second fixing portion (39) are fixedly connected with the middle portions of two side walls, parallel to a symmetry axis of the rotating portion (38), the center of the inner cylindrical surface (37) and the center of the outer cylindrical surface (36) are arranged in the center mode, and the center of the inner cylindrical surface (37) is close to the center of the pressure arm ball socket (33) relative to the center of the outer cylindrical surface (36).
4. The floating caliper type radial double push rod air pressure disc brake as claimed in claim 3, characterized in that: the first fixing part (35) and the second fixing part (39) of the pressure arm bearing part (34) are connected through an arc transition surface (40), and the arc transition surface (40) and the inner cylindrical surface (37) of the rotating part (38) form a hollow cylinder.
5. The floating caliper type radial double push rod air pressure disc brake as claimed in claim 1, characterized in that: the first chamber (6) has two superimposed chamfers (10) at the corners.
6. The floating caliper type radial double push rod air pressure disc brake as claimed in claim 1, characterized in that: the clamp plate fixing piece comprises a tail boss (14), a head groove (16) and a fixing buckle (45), the tail boss (14) and the head groove (16) are arranged on the upper surface of the first cavity (6) of the clamp body (2), one end of the clamp plate (7) is inserted into the head groove (16), and the other end of the clamp plate is fixedly connected with the tail boss (14) through the fixing buckle (45).
7. The floating caliper type radial double push rod air pressure disc brake as claimed in claim 6, characterized in that: a first connecting part (47) and a second connecting part (44) are respectively arranged at two ends of the pressing plate (7), the first connecting part (47) is inserted into the head part groove (16), an open groove (46) is arranged on the second connecting part (44), and the opening size of the open groove (46) in the axial direction of the pressing plate (7) is not smaller than the width of the tail boss (14); the inner side of the tail boss (14) is provided with a clamping groove (15), the opening groove (46) is sleeved into the tail boss (14), one side wall of the opening groove (46) is embedded into the clamping groove (15), and the opening groove (46) and the outer side of the tail boss (14) are fixed through a fixing buckle (45).
8. The floating caliper type radial double push rod air pressure disc brake as claimed in claim 6, characterized in that: the fixing buckle (45) comprises a W-shaped abutting-buckling part (48) and stopping parts (49) which are connected with two sides of the W-shaped abutting-buckling part (48) and extend outwards, each side wall of the W-shaped abutting-buckling part (48) is abutted to the outer side of the tail boss (14) and the inner side wall of the opening groove (46), and the stopping parts (49) are stopped on the pressing plate (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710372746.9A CN107120368B (en) | 2017-05-24 | 2017-05-24 | Floating caliper type radial double-push-rod air pressure disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710372746.9A CN107120368B (en) | 2017-05-24 | 2017-05-24 | Floating caliper type radial double-push-rod air pressure disc brake |
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| Publication Number | Publication Date |
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| CN107120368A CN107120368A (en) | 2017-09-01 |
| CN107120368B true CN107120368B (en) | 2023-03-24 |
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| CN201710372746.9A Active CN107120368B (en) | 2017-05-24 | 2017-05-24 | Floating caliper type radial double-push-rod air pressure disc brake |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108016288B (en) * | 2017-09-20 | 2024-03-05 | 北京理工大学 | Electric vehicle axle |
| CN108612789A (en) * | 2018-07-16 | 2018-10-02 | 浙江国昌机械有限公司 | The caliper of air-pressure disc brake |
| CN108626272A (en) * | 2018-07-16 | 2018-10-09 | 浙江国昌机械有限公司 | Air-pressure disc type brake clamps assembly |
| CN112145584A (en) * | 2020-10-09 | 2020-12-29 | 湖北华阳汽车制动器股份有限公司 | Disc brake of anti-deflection double-push-rod thrust mechanism |
| CN115574022B (en) * | 2022-12-07 | 2023-04-14 | 中国能源建设集团山西省电力勘测设计院有限公司 | Mechanical brake device of vertical axis wind generating set |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201027853Y (en) * | 2006-11-06 | 2008-02-27 | 武汉元丰汽车零部件有限公司 | Floating pincers type double-push rod barometric disk brake |
| CN201034131Y (en) * | 2006-11-14 | 2008-03-12 | 浙江诸暨万宝机械有限公司 | Tension arm of disk brake |
| DE102012006101A1 (en) * | 2012-03-26 | 2013-09-26 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Clamping device for a disc brake |
| CN203230757U (en) * | 2013-05-13 | 2013-10-09 | 武汉群峰机械有限公司 | Pressure arm applied to axial air chamber double-push-rod pneumatic disc type brake |
| CN106151316B (en) * | 2016-08-17 | 2018-04-06 | 中国重汽集团济南动力有限公司 | The disk brake assembly that air chamber is positioned radially |
| CN207018403U (en) * | 2017-05-24 | 2018-02-16 | 武汉元丰汽车零部件有限公司 | A kind of double push rod air-pressure disc brakes of floating tong type radial direction |
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