CN110701218B - Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof - Google Patents
Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof Download PDFInfo
- Publication number
- CN110701218B CN110701218B CN201910907357.0A CN201910907357A CN110701218B CN 110701218 B CN110701218 B CN 110701218B CN 201910907357 A CN201910907357 A CN 201910907357A CN 110701218 B CN110701218 B CN 110701218B
- Authority
- CN
- China
- Prior art keywords
- oil
- seal
- piston
- shell
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005065 mining Methods 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 85
- 125000006850 spacer group Chemical group 0.000 claims abstract description 41
- 239000003921 oil Substances 0.000 claims description 294
- 238000001816 cooling Methods 0.000 claims description 52
- 238000007667 floating Methods 0.000 claims description 32
- 239000012208 gear oil Substances 0.000 claims description 11
- 206010044048 Tooth missing Diseases 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
- F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
- F16D55/36—Brakes with a plurality of rotating discs all lying side by side
- F16D55/40—Brakes with a plurality of rotating discs all lying side by side actuated by a fluid-pressure device arranged in or one the brake
-
- 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
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D65/84—Features relating to cooling for disc brakes
- F16D65/853—Features relating to cooling for disc brakes with closed cooling system
-
- 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
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
-
- 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
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/06—Pistons
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses an oil-cooled multi-disc type service brake of a mining dump truck, which comprises the following components: the device comprises a piston shell, a piston, a gear ring, a driving gear, a back plate, a sealing shell, a hub adapter, an oil seal shell, a spring, a friction plate and a spacer; the piston shell, the gear ring, the driving gear and the back plate enclose a power cavity, and the piston, the spring, the friction plate and the spacer are arranged in the power cavity. The invention also discloses an oil-cooled multi-disc type service brake assembly of the mining dumper, which uses the oil-cooled multi-disc type service brake of the mining dumper. The invention has large braking force and stable performance, and is particularly suitable for large-tonnage mining dump trucks.
Description
Technical Field
The invention relates to a mining dump truck, in particular to an oil-cooled multi-disc type service brake of the mining dump truck and components thereof.
Background
The mining dumper is used for carrying out ore transportation in various surface mines, the self weight and the load of the mining dumper are huge, long-distance continuous up-down slopes are extremely large in the transportation process, and the mining dumper needs frequent braking.
When a brake caliper and a brake disc used on a road vehicle are adopted for braking of the mining dump truck, heat decay of the brake caliper and the brake disc is extremely easy to be caused by high temperature generated by continuous braking in the driving process, and the brake caliper and the brake disc are easy to be heated due to long-time friction, and fire is easy to be caused by high temperature of hydraulic pipelines near the brake caliper and the brake disc, so that great potential safety hazards exist when the brake caliper and the brake disc are used for braking of the mining dump truck.
Disclosure of Invention
The invention solves the technical problem of providing the oil-cooled multi-disc type service brake and the components thereof for the mining dump truck, which have large braking force and stable performance and are particularly suitable for large-tonnage mining dump trucks.
The technical proposal is as follows:
An oil-cooled multi-disc service brake for a mining dump truck, comprising: the device comprises a piston shell, a piston, a gear ring, a driving gear, a back plate, a sealing shell, a hub adapter, an oil seal shell, a spring, a friction plate and a spacer; the piston shell, the gear ring, the driving gear and the back plate enclose a power cavity, and the piston, the spring, the friction plate and the spacer are arranged in the power cavity; the piston shell and the back plate are respectively connected with two ends of the gear ring, a piston for pushing the friction plate spacer to axially move is arranged on the inner side of the piston shell, a first piston seal and a second piston seal are arranged between the step end face on the outer side of the piston and the piston shell, a brake oil cavity is formed by a cavity between the step end face on the outer side of the piston and the piston shell, and the brake oil cavity is positioned between the first piston seal and the second piston seal; the hub adapter is connected with the driving gear, the sealing shell is connected to the inner side of the hub adapter, and the sealing shell is in sealing contact with the backboard; the piston is provided with a counter bore, the spring is arranged in the counter bore, one end of the flange pin is sleeved on the spring, one end of the spring is connected with the bottom surface of the counter bore, and the other end of the spring is connected with the flange end surface of the flange pin; the other end of the flange pin is connected in a step counter bore on the piston shell; the friction plate and the spacer are annular in shape, and the gear ring is provided with first internal teeth on the inner wall surface; the friction plate is provided with second internal teeth on the inner wall surface, and grooves are formed on the two side wall surfaces; the inside of the driving gear is radially provided with a driving gear oil duct, the outer wall of the driving gear is provided with first external teeth, and the spacer is provided with second external teeth on the outer side wall; the second internal teeth of the friction plate are meshed with the first external teeth, the second external teeth of the spacer are meshed with the first internal teeth of the gear ring, and the friction plate and the spacer are arranged at intervals; the upper part of the oil seal shell is in contact seal with the hub adapter, the lower part of the oil seal shell is provided with a bottom shaft hole, and the side part of the oil seal shell is provided with a stop pin; the piston shell is provided with a straight oil duct, an inclined oil duct, a cooling oil inlet oil duct and a cooling oil return oil duct, the tail end of the straight oil duct is communicated with the inclined oil duct, the head end of the straight oil duct is used for being connected with a brake oil duct, and the inclined oil duct is communicated with a brake oil cavity; the cooling oil inlet channel is used for communicating an oil inlet pipe and a cooling oil cavity, the cooling oil cavity is communicated with a power cavity through a driving gear oil channel, the power cavity is communicated with an oil return oil cavity, and the cooling oil return oil channel is respectively communicated with an oil return pipe and an oil return oil cavity; the clearance enclosed by the piston shell, the piston and the gear ring is an oil return cavity.
Further, a floating seal and a framework oil seal are arranged at the contact position between the hub adapter and the oil seal shell; and floating seals and skeleton oil seals are arranged at contact positions among the seal shell, the hub adapter and the back plate.
Further, a lateral boss is arranged at the outer side of the hub adapter, the top of the oil seal shell is positioned at the lower part of the lateral boss, and the framework oil seal is positioned between the top of the oil seal shell and the lateral boss; the floating seal is located between the hub adapter and the sidewall surface of the oil seal housing.
Further, the framework oil seals are arranged on the outer sides of the floating seals, 2 framework oil seals are arranged back to back, and the sealing lips of the framework oil seals face outwards; the framework oil seal is arranged in a framework sealing groove at the bottom of the side boss, and is matched with the outer circumferential surface of the oil seal shell to realize sealing; the O-ring on one side of the floating seal is mounted in the hub adapter seal groove of the hub adapter, and the O-ring on the other side is mounted in the oil seal housing seal groove of the oil seal housing.
Further, an O-ring on one side of a floating seal between the seal housing and the back plate is arranged in a back plate seal groove on the back plate, and an O-ring on the other side of the floating seal is arranged in a seal housing seal groove on the seal housing; the framework oil seal is arranged in a backboard framework sealing groove on the backboard, and the framework oil seal is matched with the outer circular surface of the sealing shell to realize sealing.
Further, a first sealing ring is arranged between the piston shell and the frame, a second sealing ring is arranged between the inner wall surface of the bottom shaft hole of the oil seal shell and the rotating shaft, a third sealing ring is arranged between the hub adapter and the hub, a fourth sealing ring is arranged on the end surfaces of the two sides of the gear ring, and a fifth sealing ring is arranged between the hub adapter and the sealing shell; the side wall surface of the piston shell is provided with a first sealing groove, and a first sealing ring is arranged in the first sealing groove; the inner wall surface of the bottom shaft hole of the oil seal shell is provided with a second sealing groove, and a second sealing ring is arranged in the second sealing groove; the outer wall of the hub adapter is provided with a third sealing groove, and a third sealing ring is arranged on the third sealing groove; the end surfaces of the two sides of the gear ring are provided with fourth sealing grooves, and the fourth sealing rings are arranged on the fourth sealing grooves; the step surface of the hub adapter is provided with a fifth sealing groove, and a fifth sealing ring is arranged on the fifth sealing groove.
Further, a seal housing locating pin is arranged between the hub adapter and the seal housing; the connecting pin is penetrated in the through hole at the tail end of the flange pin and is clamped in the step counter bore of the piston shell; the outer wall of the driving gear is provided with a tooth missing groove, and an opening of an oil duct of the driving gear is positioned in the tooth missing groove.
Further, a first oil duct and a second oil duct are arranged on the piston shell, a first oil duct plug is arranged at the tail end of the first oil duct, and a second oil duct plug is arranged at the tail end of the second oil duct; the first oil duct is communicated with an oil return cavity; the back plate is provided with a back plate oil passage, one end of an opening of the back plate oil passage is propped against the floating seal, the other end of the opening of the back plate oil passage is provided with a back oil passage plug, and the opening of the back plate framework sealing groove is communicated with the back plate oil passage; the gear ring is provided with a gear ring oil duct, and a side opening of the back plate oil duct is communicated with the gear ring oil duct; the gear ring oil duct is communicated with the second oil duct of the piston shell, and a positioning pipe is arranged at the joint of the gear ring oil duct, the second oil duct and the backboard oil duct.
Further, the first piston seal, the second piston seal and the wear-resistant ring are respectively arranged in annular grooves on the outer wall of the piston; the hub adapter is provided with a hub adapter oil duct along the radial direction, and the hub adapter oil duct is communicated with the cooling oil cavity.
A mining dump truck oil-cooled multi-disc service brake assembly using a mining dump truck oil-cooled multi-disc service brake, comprising: the mining dump truck comprises a frame and a wheel hub, wherein an oil-cooled multi-disc type service brake of the mining dump truck is arranged on the frame of the drive axle and is positioned between the frame and the wheel hub; the piston shell is connected with the frame, the hub adapter is connected with the hub, the lower part of the oil seal shell is sleeved on the rotating shaft of the frame, and the upper part of the oil seal shell is in contact seal with the hub adapter; the retaining pin of the oil seal shell is inserted on the shoulder of the frame and used for preventing the oil seal shell from rotating; the side wall surface of the oil seal shell positioned at the other side of the stop pin is propped against a hub bearing, and the hub bearing is arranged on a rotating shaft of the frame; the cooling oil chamber is located between the service brake and the frame.
The technical effects of the invention include:
compared with the existing braking mode of a brake caliper and a brake disc, the invention has larger braking force and stable performance, and is particularly suitable for large-tonnage mining dump trucks.
Drawings
FIG. 1 is a state diagram of the use of an oil-cooled multi-disc service brake of a mining dump truck according to the present invention;
FIG. 2 is a schematic illustration of the position of the service brake in the transaxle of the present invention;
FIG. 3 is a sectional view of the service brake of the present invention;
FIG. 4 is a cross-sectional view of a service brake of the present invention;
FIG. 5 is an enlarged view of position A of the present invention;
FIG. 6 is a block diagram of a spacer according to the present invention;
FIG. 7 is a block diagram of a friction plate according to the present invention;
FIG. 8 is a partial cross-sectional view of a service brake of the present invention;
FIG. 9 is an enlarged view of position B in the present invention;
FIG. 10 is an enlarged view of position C in the present invention;
FIG. 11 is a cross-sectional view of a cooling oil inlet passage in the present invention;
FIG. 12 is a cross-sectional view of a cooling oil return gallery in accordance with the present invention;
FIG. 13 is a cross-sectional view of a brake oil gallery in accordance with the present invention;
FIG. 14 is an isometric view of a drive gear of the present invention;
Fig. 15 is a sectional view showing the position of the floating seal, the drive gear, and the seal housing according to the present invention.
Detailed Description
The following description fully illustrates the specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
As shown in fig. 1, the invention is a use state diagram of an oil-cooled multi-disc type service brake of the mining dump truck; as shown in fig. 2, the present invention is a position diagram of the service brake 4 in the transaxle.
The tire 2 of the mining dump truck is arranged on the wheel hub 1, the wheel hub 1 is arranged on a driving axle, and the oil-cooled multi-disc service brake 4 (service brake 4 for short) of the mining dump truck is arranged on the frame 3 of the driving axle and is positioned between the frame 3 and the wheel hub 1.
When the mining dump truck applies braking, the service brake 4 applies braking torque to the hub 1 to limit the rotation speed of the hub 1, the rotation speed of the tire 2 is also limited, and finally, the deceleration braking of the mining dump truck is realized.
As shown in fig. 3, a sectional view of the service brake 4 according to the invention is shown; as shown in fig. 4, a cross-sectional view of the service brake 4 according to the invention; an enlarged view of the A position in the present invention is shown in FIG. 5.
The service brake 4 includes: piston housing 401, piston 402, ring gear 403, drive gear 404, back plate 405, seal housing 406, hub adapter 407, oil seal housing 408, floating seal 409, backbone oil seal 410, spring 411, friction plate 412, spacer 413.
The piston housing 401 of the service brake 4 is connected with the frame 3 through a first bolt, and a first sealing ring is arranged between the piston housing 401 and the frame 3 (a first sealing groove 4011 is arranged on the side wall surface of the piston housing 401, and the first sealing ring is arranged in the first sealing groove 4011); the hub adapter 407 is connected with the hub 1 through a second bolt 415, the lower part of the oil seal shell 408 is sleeved on the rotating shaft of the frame 3, and the upper part of the oil seal shell 408 is in contact sealing with the hub adapter 407; the oil seal shell 408 is provided with a stop pin 414, the stop pin 414 is inserted on the shoulder 31 of the frame 3, and the stop pin 414 is used for preventing the oil seal shell 408 from rotating; a second seal ring is provided between the inner wall surface of the bottom shaft hole of the oil seal housing 408 and the rotating shaft (the inner wall surface of the bottom shaft hole of the oil seal housing 408 is provided with a second seal groove, the second seal ring is installed in the second seal groove), and the side wall surface of the oil seal housing 408 located at the other side of the stopper pin 414 abuts against the hub bearing 11. The hub bearing 11 is mounted on the rotating shaft of the frame 3.
A floating seal 409 and a backbone oil seal 410 are provided between the hub adapter 407 and the oil seal housing 408. The outer side of the hub adapter 407 is provided with a side boss 4072, the top of the oil seal housing 408 is located below the side boss 4072, and the skeleton oil seal 410 is located between the top of the oil seal housing 408 and the side boss 4072. A floating seal 409 is located between the hub adapter 407 and the sidewall surface of the oil seal housing 408. The outer wall of the hub adapter 407 is provided with a third sealing groove 4071, and the third sealing groove 4071 is provided with a third sealing ring, and the third sealing ring is located between the hub adapter 407 and the hub 1. The hub adapter 407 is radially provided with a hub adapter oil passage 4074, and the hub adapter oil passage 4074 communicates with the cooling oil chamber 48 and the communication power chamber, respectively.
The skeleton oil seal 410 sets up in the outside of floating seal 409, and 2 skeleton oil seals 410 are installed back to back, and the sealing lip of skeleton oil seal 410 outwards. An O-ring on one side of the floating seal 409 is mounted in the hub adapter seal groove 4071 of the hub adapter 407 and an O-ring on the other side is mounted in the oil seal housing seal groove 4081 of the oil seal housing 408. The skeleton oil seal 410 is installed in the skeleton seal groove 4052 at the bottom of the side boss 4072, and the skeleton oil seal 410 is matched with the outer circular surface 4082 of the oil seal shell 408 to realize sealing.
The cooling oil chamber 48 between the service brake 4 and the frame 3 is surrounded by the piston housing 401, the frame 3, the drive gear 404, the hub adapter 407, and the oil seal housing 408, and is sealed with a first seal ring, a second seal ring, and a floating seal 409. The cavity enclosed by the oil seal housing 408, the hub adapter 407, the hub 1 and the hub bearing 11 is an oil cavity 12, and is sealed by a floating seal 409, a framework oil seal 410, a second sealing ring and a third sealing ring. The cooling oil chamber 48 is isolated from the lubricating oil chamber 12, so that the cooling of the service brake 4 and the lubrication of the bearing 11 are not affected. The lubricating oil cavity 12 is used for providing lubricating oil for the bearing 11 and is an original part of the hub 1.
The piston housing 401 is connected to the ring gear 403 by a third bolt 416, and the other side of the ring gear 403 is connected to the back plate 405 by a fourth bolt 417. A piston 402 is arranged inside the piston housing 401, a first piston seal 4021, a second piston seal 4022 and a wear ring 4023 being provided between the piston 402 and the piston housing 401. The first piston seal 4021, the second piston seal 4022, and the wear ring 4023 are respectively installed in annular grooves on the outer wall of the piston 402.
The piston housing 401, the gear ring 403, the driving gear 404, and the back plate 405 define a power chamber, and the piston 402, the spring 411, the friction plate 412, and the spacer 413 are disposed in the power chamber. The gear ring 403 is provided with fourth seal grooves on end surfaces on both sides, and fourth seal rings 4032 are installed in the fourth seal grooves.
The piston 402 is provided with a counter bore, the spring 411 is arranged in the counter bore, one end of the flange pin 428 is sleeved on the spring 411, one end of the spring 411 is connected with the bottom surface of the counter bore, and the other end is connected with the flange end surface of the flange pin 428; the other end of the flange pin 428 extends into a step counter bore on the piston housing 401, and the connecting pin 429 penetrates into a through hole at the tail end of the flange pin 428; the connecting pin 429 is clamped on the small hole end surface of the step counter bore of the piston housing 401, so that the flange pin 428 is connected with the piston housing 401 and kept relatively static, and one end of the spring 411 is limited.
As shown in fig. 6, a structure of a spacer 413 in the present invention is shown; as shown in fig. 7, a friction plate 412 according to the present invention is shown in a structure.
The friction plate 412 and the spacer 413 have annular outer shapes. The ring gear 403 is provided with first internal teeth 4031 on the inner wall surface, the friction plate 412 is provided with second internal teeth 4121 on the inner wall surface, and grooves 4122 are provided on both side wall surfaces; the spacer 413 is provided with second external teeth 4131 on the external side wall.
The friction plate 412 and the spacer 413 are attached to the drive gear 404, and the second inner teeth 4121 of the friction plate 412 mesh with the first outer teeth 4041 of the drive gear 404, and the second outer teeth 4131 of the spacer 413 mesh with the first inner teeth 4031 of the ring gear 403. The friction plates 412 are arranged at intervals with the spacers 413, and the spacers 413 are arranged at two sides of the friction plates 412, and the total number of the friction plates 412 is 11, and the number of the spacers 413 is 12.
The seal housing 406 and the hub adapter 407 have annular overall shapes, the seal housing 406 is connected to the hub adapter 407 by a sixth bolt 4062, a gasket 4063 is mounted on the sixth bolt 4062, and a seal housing positioning pin is provided between the hub adapter 407 and the seal housing 406. The contact locations between the seal housing 406, hub adapter 407 and back plate 405 are provided with a floating seal 409 and a backbone oil seal 410. A fifth sealing ring 4073 is provided between the hub adapter 407 and the seal housing 406. By adjusting the thickness of the spacer 4063, the seal housing 406 can be moved axially toward the floating seal 409, and the distance between the back plate end face 4053 and the seal housing end face 4065 can be increased or decreased, thereby adjusting the pressing force of the floating seal 409.
An O-ring on one side of a floating seal 409 between seal housing 406 and back plate 405 is mounted in back plate seal groove 4051 on back plate 405 and an O-ring on the other side is mounted in seal housing seal groove 4061 on seal housing 406; after the installation, the floating seal 409 is installed in the state that two O-rings in the back plate seal groove 4051 and the seal housing seal groove 4061 are pressed, the O-rings generate expansion force to two sides, one side of the expansion force acts on the back plate 405 and the seal housing 406, and the other side is pressed to be positioned in the middle to realize the sealing. The skeleton oil seal 410 is installed in a backboard skeleton seal groove 4052 on the backboard 405, and the skeleton oil seal 410 is matched with an outer circular surface 4064 of the seal housing 406 to realize sealing.
The backboard 405 is provided with a backboard oil duct 4054, one end of an opening of the backboard oil duct 4054 is propped against the floating seal 409, the other end of the opening is provided with a back oil duct plug 4055, and an opening of the backboard skeleton sealing groove 4052 is communicated with the backboard oil duct 4054; the back plate oil passage side opening 4056 of the back plate oil passage 4054 communicates with the ring gear oil passage 4033.
The ring gear oil passage 4033 is communicated with the second oil passage 4013 of the piston housing 401, and the ring gear oil passage 4033 is provided with a positioning pipe 4034 at the joint with the second oil passage 4013 and the back plate oil passage 4054.
As shown in fig. 8, a partial cross-sectional view of the service brake 4 of the present invention; FIG. 9 is an enlarged view of position B of the present invention; FIG. 10 is an enlarged view of the C position of the present invention; as shown in fig. 11, a cross-sectional view of the cooling oil inlet passage in the present invention; as shown in fig. 12, a cross-sectional view of the cooling oil return passage of the present invention; as shown in fig. 13, a cross-sectional view of the brake oil passage in the present invention is shown.
The cavity formed between the piston 402 and the end face of the piston housing 401 is a brake oil chamber 49. The piston housing 401 is provided with a first oil duct 4012, a second oil duct 4013, a straight oil duct 4014, an inclined oil duct 4015, a cooling oil inlet duct 4016 and a cooling oil return duct 4017, the tail end of the straight oil duct 4014 is communicated with the inclined oil duct 4015, the head end of the straight oil duct 4014 is used for connecting a brake oil duct, and the inclined oil duct 4015 is communicated with the brake oil chamber 49. The first oil duct 4012 and the second oil duct 4013 are oil drain ducts, a first oil duct plug 4018 is arranged at the tail end of the first oil duct 4012, and a second oil duct plug 4019 is arranged at the tail end of the second oil duct 4013. The cooling oil inlet channel 4016 is respectively connected with the oil inlet pipe 50 and the cooling oil cavity 48, and the cooling oil return channel 4017 is respectively connected with the oil return pipe 51 and the oil return cavity 47. The first oil passage 4012 communicates with the return oil chamber 47. The clearance enclosed by the piston housing 401, the piston 402 and the ring gear 403 is the return oil chamber 47.
As shown in fig. 14, an isometric view of a drive gear 404 of the present invention; as shown in fig. 15, the floating seal 409, the drive gear 404, and the seal housing 406 are shown in a cross-sectional view in the present invention.
The drive gear 404 is provided with a drive gear oil passage 4042 in the radial direction, and the drive gear 404 is provided with first external teeth 4041 and tooth gaps 4043 on the outer side wall. The drive gear 404 is connected to the hub adapter 407 by a fifth bolt 4044.
The oil inlet pipe 50 and the cooling oil inlet oil duct 4016 are communicated with the cooling oil cavity 48, the cooling oil cavity 48 is communicated with the power cavity through the driving gear oil duct 4042, the power cavity is communicated with the oil return oil cavity 47, and the cooling oil return oil duct 4017 is respectively communicated with the oil return oil cavity 47 and the oil return pipe 51.
The friction plate 412 and the spacer 413 are attached to the drive gear 404, and the second inner teeth 4121 of the friction plate 412 mesh with the first outer teeth 4041 of the drive gear 404, and the second outer teeth 4131 of the spacer 413 mesh with the first inner teeth 4031 of the ring gear 403. The friction plates 412 are arranged at intervals with the spacers 413, and the spacers 413 are arranged at two sides of the friction plates 412, and the total number of the friction plates 412 is 11, and the number of the spacers 413 is 12. The cooling oil inlet channel 4016 is respectively connected with the oil inlet pipe 50 and the cooling oil cavity 48, and the cooling oil return channel 4017 is respectively connected with the oil return pipe 51 and the oil return cavity 47.
When the dump truck runs and does not apply braking, the hub adapter 407 is driven by the hub 1 to rotate; the hub adapter 407 in turn drives the drive gear 404, friction plate 412 and seal housing 406 in rotation, the piston housing 401, gear ring 403 and back plate 405 being fixed to the stationary frame 3, the first internal teeth 4031 of the gear ring 403 being held relatively stationary with the gear ring 403 by the second external teeth 4131 of the snap-in spacer 413, the spacer 413 also being held relatively stationary with respect to the gear ring 403; at this time, the piston 402 is fully retracted into the piston housing 401 by the spring 411, and the friction plate 412 and the spacer 413 are not compressed, with a gap therebetween. The cooling oil flows into the cooling oil chamber 48 through the oil inlet pipe 50 and the cooling oil inlet oil passage 4016, flows from the cooling oil chamber 48 through the driving gear oil passage 4042 and the tooth-missing grooves 4043, flows out from the gap between the friction plate 412 and the spacer 413 to the oil return oil chamber 47, and flows out through the cooling oil return oil passage 4017 and the oil return pipe 51. This is a typical cycle of cooling oil when the brake is not applied.
When the dump truck applies braking, braking high-pressure oil enters the braking oil cavity 49 through the straight oil duct 4014 and the inclined oil duct 4015 on the piston housing 401, the high-pressure oil pushes the piston 402 to move to one side of the friction plate 412 until the friction plate 412 and the spacer 413 are fully pressed, and the adjacent surfaces of the friction plate 412 and the spacer 413 are fully contacted without gaps. The cooling oil flows into the cooling oil cavity 48 through the oil inlet pipe 50 and the cooling oil inlet oil duct 4016, flows into a gap between the friction plate 412 and the spacer 413 in the power cavity through the driving gear oil duct 4042, the hub adapter oil duct 4074 and the tooth-missing groove 4043, flows out to the oil return oil cavity 47 through the groove 4122 on the friction plate 412, and flows out through the cooling oil return oil duct 4017 and the oil return pipe 51, and when the cooling oil flows through the groove 4122 of the friction plate 412, heat generated by braking is taken away, so that the temperature is kept constant during braking. The above is a cycle of cooling oil during brake application.
When the dump truck brakes, friction braking torque is generated on the contact surface after the friction plate 412 and the spacer 413 are pressed, rotation of the friction plate 412 is limited, rotation of the driving gear 404 and the hub adapter 407 is further limited by the friction plate 412, and finally, the braking torque acts on the hub 1 and the tire 2, and braking force is finally generated on the dump truck through action of the tire 2 and the ground, so that the purpose of braking and decelerating is achieved.
After the service brake 4 is installed, the first oil passage 4012 and the second oil passage 4013 face in the 6 o' clock direction. When the dump truck is operating normally, the second oil passage plug 4019 is periodically unscrewed to check whether cooling oil is flowing out to determine whether the floating seal 409 has failed. When the service brake 4 needs to be maintained, the first oil duct plug 4018 is unscrewed, and the cooling oil which cannot flow out of the cooling oil return duct 4017 in the cooling oil cavity 48 is discharged into the storage container, so that a large amount of oil flows out to the ground to pollute the environment during disassembly.
The terminology used herein is for the purpose of description and illustration only and is not intended to be limiting. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (7)
1. An oil-cooled multi-disc service brake of a mining dump truck, which is characterized by comprising: the device comprises a piston shell, a piston, a gear ring, a driving gear, a back plate, a sealing shell, a hub adapter, an oil seal shell, a spring, a friction plate and a spacer; the piston shell, the gear ring, the driving gear and the back plate enclose a power cavity, and the piston, the spring, the friction plate and the spacer are arranged in the power cavity; the piston shell and the back plate are respectively connected with two ends of the gear ring, a piston for pushing the friction plate spacer to axially move is arranged on the inner side of the piston shell, a first piston seal and a second piston seal are arranged between the step end face on the outer side of the piston and the piston shell, a brake oil cavity is formed by a cavity between the step end face on the outer side of the piston and the piston shell, and the brake oil cavity is positioned between the first piston seal and the second piston seal; the hub adapter is connected with the driving gear, the sealing shell is connected to the inner side of the hub adapter, the sealing shell is in sealing contact with the back plate, and floating seals and skeleton oil seals are arranged at the contact positions among the sealing shell, the hub adapter and the back plate; the piston is provided with a counter bore, the spring is arranged in the counter bore, one end of the flange pin is sleeved on the spring, one end of the spring is connected with the bottom surface of the counter bore, and the other end of the spring is connected with the flange end surface of the flange pin; the other end of the flange pin is connected in a step counter bore on the piston shell; the friction plate and the spacer are annular in shape, and the gear ring is provided with first internal teeth on the inner wall surface; the friction plate is provided with second internal teeth on the inner wall surface, and grooves are formed on the two side wall surfaces; the inside of the driving gear is radially provided with a driving gear oil duct, the outer wall of the driving gear is provided with first external teeth, and the spacer is provided with second external teeth on the outer side wall; the second internal teeth of the friction plate are meshed with the first external teeth, the second external teeth of the spacer are meshed with the first internal teeth of the gear ring, and the friction plate and the spacer are arranged at intervals; the upper part of the oil seal shell is in contact seal with the hub adapter, a floating seal and a framework oil seal are arranged at the contact position between the hub adapter and the oil seal shell, a lateral boss is arranged at the outer side part of the hub adapter, the top of the oil seal shell is positioned at the lower part of the lateral boss, the framework oil seal is positioned between the top of the oil seal shell and the lateral boss, and the floating seal is positioned between the hub adapter and the lateral wall surface of the oil seal shell; the framework oil seals are arranged on the outer sides of the floating seals, the 2 framework oil seals are arranged back to back, and the sealing lips of the framework oil seals face outwards; the framework oil seal is arranged in a framework sealing groove at the bottom of the side boss, and is matched with the outer circumferential surface of the oil seal shell to realize sealing; the O-shaped ring at one side of the floating seal is arranged in a hub adapter sealing groove of the hub adapter, and the O-shaped ring at the other side of the floating seal is arranged in an oil seal shell sealing groove of the oil seal shell; the lower part of the oil seal shell is provided with a bottom shaft hole, and the side part of the oil seal shell is provided with a stop pin; the piston shell is provided with a straight oil duct, an inclined oil duct, a cooling oil inlet oil duct and a cooling oil return oil duct, the tail end of the straight oil duct is communicated with the inclined oil duct, the head end of the straight oil duct is used for being connected with a brake oil duct, and the inclined oil duct is communicated with a brake oil cavity; the cooling oil inlet channel is used for communicating an oil inlet pipe and a cooling oil cavity, the cooling oil cavity is communicated with a power cavity through a driving gear oil channel, the power cavity is communicated with an oil return oil cavity, and the cooling oil return oil channel is respectively communicated with an oil return pipe and an oil return oil cavity; the clearance enclosed by the piston shell, the piston and the gear ring is an oil return cavity.
2. The mining dump truck oil-cooled multi-disc service brake of claim 1, wherein an O-ring on one side of a floating seal between the seal housing and the backplate is mounted in a backplate seal groove on the backplate, and an O-ring on the other side is mounted in a seal housing seal groove on the seal housing; the framework oil seal is arranged in a backboard framework sealing groove on the backboard, and the framework oil seal is matched with the outer circular surface of the sealing shell to realize sealing.
3. The mining dump truck oil-cooled multi-disc service brake according to claim 1, wherein a first sealing ring is arranged between the piston housing and the frame, a second sealing ring is arranged between the inner wall surface of the bottom shaft hole of the oil seal housing and the rotating shaft, a third sealing ring is arranged between the hub adapter and the hub, fourth sealing rings are arranged on the end surfaces of the two sides of the gear ring, and a fifth sealing ring is arranged between the hub adapter and the sealing housing; the side wall surface of the piston shell is provided with a first sealing groove, and a first sealing ring is arranged in the first sealing groove; the inner wall surface of the bottom shaft hole of the oil seal shell is provided with a second sealing groove, and a second sealing ring is arranged in the second sealing groove; the outer wall of the hub adapter is provided with a third sealing groove, and a third sealing ring is arranged on the third sealing groove; the end surfaces of the two sides of the gear ring are provided with fourth sealing grooves, and the fourth sealing rings are arranged on the fourth sealing grooves; the step surface of the hub adapter is provided with a fifth sealing groove, and a fifth sealing ring is arranged on the fifth sealing groove.
4. The mining dump truck oil-cooled multi-disc service brake of claim 1, wherein a seal housing locating pin is disposed between the hub adapter and the seal housing; the connecting pin is penetrated in the through hole at the tail end of the flange pin and is clamped in the step counter bore of the piston shell; the outer wall of the driving gear is provided with a tooth missing groove, and an opening of an oil duct of the driving gear is positioned in the tooth missing groove.
5. The mining dump truck oil-cooled multi-disc service brake of claim 1, wherein a first oil duct and a second oil duct are arranged on the piston housing, a first oil duct plug is arranged at the tail end of the first oil duct, and a second oil duct plug is arranged at the tail end of the second oil duct; the first oil duct is communicated with an oil return cavity; the back plate is provided with a back plate oil passage, one end of an opening of the back plate oil passage is propped against the floating seal, the other end of the opening of the back plate oil passage is provided with a back oil passage plug, and the opening of the back plate framework sealing groove is communicated with the back plate oil passage; the gear ring is provided with a gear ring oil duct, and a side opening of the back plate oil duct is communicated with the gear ring oil duct; the gear ring oil duct is communicated with the second oil duct of the piston shell, and a positioning pipe is arranged at the joint of the gear ring oil duct, the second oil duct and the backboard oil duct.
6. The mining dump truck oil-cooled multi-disc service brake of claim 1, wherein the first piston seal, the second piston seal and the wear ring are respectively installed in annular grooves on the outer wall of the piston; the hub adapter is provided with a hub adapter oil duct along the radial direction, and the hub adapter oil duct is communicated with the cooling oil cavity.
7. A mining dump truck oil-cooled multi-disc service brake assembly using the mining dump truck oil-cooled multi-disc service brake of any one of claims 1 to 6, comprising: the hydraulic self-dumping truck is characterized in that the oil-cooled multi-disc type service brake of the mining self-dumping truck is arranged on the rack of the drive axle and is positioned between the rack and the wheel hub; the piston shell is connected with the frame, the hub adapter is connected with the hub, the lower part of the oil seal shell is sleeved on the rotating shaft of the frame, and the upper part of the oil seal shell is in contact seal with the hub adapter; the retaining pin of the oil seal shell is inserted on the shoulder of the frame and used for preventing the oil seal shell from rotating; the side wall surface of the oil seal shell positioned at the other side of the stop pin is propped against a hub bearing, and the hub bearing is arranged on a rotating shaft of the frame; the cooling oil chamber is located between the service brake and the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910907357.0A CN110701218B (en) | 2019-09-24 | 2019-09-24 | Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910907357.0A CN110701218B (en) | 2019-09-24 | 2019-09-24 | Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110701218A CN110701218A (en) | 2020-01-17 |
| CN110701218B true CN110701218B (en) | 2024-06-14 |
Family
ID=69195692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910907357.0A Active CN110701218B (en) | 2019-09-24 | 2019-09-24 | Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110701218B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692243B (en) * | 2020-06-24 | 2021-12-21 | 徐州徐工矿业机械有限公司 | Multi-piston wet brake of electric drive mining dump truck |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210889841U (en) * | 2019-09-24 | 2020-06-30 | 内蒙古北方重型汽车股份有限公司 | Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1474855A (en) * | 1974-11-11 | 1977-05-25 | Caterpillar Tractor Co | Annular dual piston brake arrangement and cooling circuit therefor |
| US6345712B1 (en) * | 2000-06-09 | 2002-02-12 | Dana Corporation | Axle assembly with liquid cooled brake |
| ATE399689T1 (en) * | 2004-05-14 | 2008-07-15 | Naf Neunkirchener Achsenfabrik | WHEEL HUB |
| DE102005007685A1 (en) * | 2005-02-19 | 2006-08-31 | Zf Friedrichshafen Ag | Cooling oil feed for wet-running shift or start-up element has radial bore in shift/start-up element shaft for passing cooling oil to lamella packet; quantity of oil fed to packet can be mechanically controlled depending on piston position |
| CN101563550B (en) * | 2006-12-18 | 2012-11-07 | 福乐尼·乐姆宝公开有限公司 | Brake caliper with cooling system |
| CN201525370U (en) * | 2009-09-19 | 2010-07-14 | 煤炭科学研究总院太原研究院 | Inner brake with cooling effect of drive axle for storage battery forklift truck |
| CN201723624U (en) * | 2010-06-06 | 2011-01-26 | 内蒙古北方重型汽车股份有限公司 | Mine dump truck wet type multi-disc brake |
| CN202935089U (en) * | 2012-12-06 | 2013-05-15 | 安徽合力股份有限公司 | Multifunctional wet axle of 5-to-10-ton forklift |
| CN203939896U (en) * | 2014-05-06 | 2014-11-12 | 殷浩东 | A kind of vehicle bridge wheel multi-disc disc type wet brake for limit |
| CN204878445U (en) * | 2015-07-07 | 2015-12-16 | 南车戚墅堰机车车辆工艺研究所有限公司 | Wet -type multi -disc service brake ware |
| CN204942331U (en) * | 2015-08-21 | 2016-01-06 | 湖南交通职业技术学院 | A kind of automobile double caliper disc brake |
| CN205001421U (en) * | 2015-09-29 | 2016-01-27 | 苏州德珃机械电子科技有限公司 | Hydraulic pressure return multi -disc wet brakes |
| CN105443613A (en) * | 2015-12-14 | 2016-03-30 | 内蒙古北方重型汽车股份有限公司 | Mining dump truck wet brake |
| CN106763308A (en) * | 2016-12-23 | 2017-05-31 | 盐城振宇科技发展有限公司 | A kind of new vehicle water-cooled disc brake apparatus and its type of cooling |
| CN107265354B (en) * | 2017-06-26 | 2023-04-14 | 安徽合力股份有限公司 | Integrated wet braking drive axle for forklift traveling and parking |
| CN108591305B (en) * | 2018-05-15 | 2019-08-06 | 北京理工大学 | A kind of Electric Motor Wheel with pellet pressure structure brake |
-
2019
- 2019-09-24 CN CN201910907357.0A patent/CN110701218B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210889841U (en) * | 2019-09-24 | 2020-06-30 | 内蒙古北方重型汽车股份有限公司 | Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110701218A (en) | 2020-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105599591B (en) | hub drive assembly | |
| CN102829152B (en) | A kind of reverse-flow type hydraulic limited slip differential | |
| CN102494055A (en) | Multi-disk wet-type brake for loading machine | |
| CN203822917U (en) | Wet type multi-pad parking brake | |
| CN110701218B (en) | Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof | |
| CN202371053U (en) | Wet brake | |
| CN103644304A (en) | Lip-shaped labyrinth seal ring with L-shaped metallic framework and U-shaped metallic framework reversely combined | |
| CN203656199U (en) | Combined type lip-shaped labyrinth sealing ring | |
| CN103912613A (en) | Wet multi-disc parking brake | |
| CN201827270U (en) | Totally closed multiple-disk oil-cooled brake | |
| CN210889841U (en) | Oil-cooled multi-disc type service brake of mining dump truck and assembly thereof | |
| CN209943387U (en) | Parking brake and loader | |
| CN203670556U (en) | Closed complete disc wet brake with multiple discs | |
| CN109538663B (en) | Normally closed wet brake | |
| CN106740745B (en) | Wet braking drive axle of scraper | |
| CN202560887U (en) | Wet-type braking device for mine tipping truck | |
| CN105416045A (en) | Wheel edge with braking and torque transmission functions and drive axle with wheel edge | |
| CN210715658U (en) | Wet brake and hub reduction driving device | |
| CN210599944U (en) | Parking brake | |
| CN203727102U (en) | Construction machine and drive axle assembly thereof | |
| CN111692243B (en) | Multi-piston wet brake of electric drive mining dump truck | |
| CN107939864B (en) | Pneumatic parking brake | |
| CN202790383U (en) | Reflux type hydraulic limited slip differential | |
| CN112576652A (en) | Brake | |
| CN212318580U (en) | Novel braking system device of underground carry scraper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |