CN117685315B - Power takeoff structure of AMT transmission supporting driving power take-off - Google Patents
Power takeoff structure of AMT transmission supporting driving power take-off Download PDFInfo
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- CN117685315B CN117685315B CN202410148723.XA CN202410148723A CN117685315B CN 117685315 B CN117685315 B CN 117685315B CN 202410148723 A CN202410148723 A CN 202410148723A CN 117685315 B CN117685315 B CN 117685315B
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Abstract
The invention discloses a power takeoff structure supporting driving power taking of an AMT (automatic transmission), which relates to the field of power transmission. The invention can reduce the rotation speed of the input shaft of the power takeoff through friction braking under the condition of higher input rotation speed, reduce the rotation speed difference of the sliding gear sleeve and the input shaft, ensure smooth gear engagement and realize the purpose of taking power during driving at medium and high speeds.
Description
Technical Field
The invention belongs to the field of power transmission, and particularly relates to a power takeoff structure of an AMT (automated mechanical transmission) for supporting driving power take-off.
Background
The power takeoff is an additional power output device arranged on the outer side of the gearbox, can acquire power from the gearbox, and is a power source for realizing the special function of the special automobile. The domestic power take-off is mostly used on the dump truck, so the requirement on the power take-off is single, but in some areas, because the special vehicle has high requirement on the power take-off, power take-off manufacturers can design the power take-off with multiple output ends or the power take-off with a clutch, the control modes of the power take-off are also various, and the air control mode is common. The importance of development and manufacture of power take-offs as key components of dedicated automobiles has attracted attention from those skilled in the art.
The prior art is, for example, an invention patent named power take-off control, which is disclosed in US20210222743A1. Exemplary vehicles, power take-off control systems, and power take-off control methods are disclosed that control operation of a power take-off based on sensed proximity of an operator to the power take-off, where the operator may be too close to the power take-off, may prevent the power take-off from powering on or turning on, where the operator may be too close to the power take-off while the power take-off is running, and where the power take-off may be braked or decelerated, such exemplary vehicles, control systems, and control methods reduce the likelihood of the operator being involved in the power take-off. The invention realizes the integral operation of the power takeoff controlled according to the proximity, is beneficial to the safety of operators, but can not realize uniform deceleration and internal pressure balance in the deceleration process of the power output device.
Disclosure of Invention
The invention aims to provide a power takeoff structure for supporting driving power taking of an AMT (automatic transmission), which can reduce the rotation speed of an input shaft of the power takeoff through friction braking under the condition of higher input rotation speed, reduce the rotation speed difference of a sliding gear sleeve and the input shaft, ensure smooth gear engagement and realize the purpose of driving power taking at medium and high speeds.
The technical scheme adopted by the invention for achieving the purpose is as follows:
the utility model provides a power takeoff structure of AMT derailleur support driving power take-off, including the power take-off input shaft, power take-off input shaft one end interval sets up the tooth cover that slides, power take-off input shaft is close to the tip of tooth cover that slides and is equipped with power take-off brake equipment, power take-off brake equipment includes brake piston, brake piston one side interval is equipped with the brake end cover, be equipped with the brake pressure disk that is not less than three interval settings between brake piston and the brake end cover, be equipped with the brake friction disc between the adjacent brake pressure disk, the brake friction disc passes through spline and power take-off input shaft fixed connection, the brake pressure disk outside encircles the cover and is equipped with the ring section of thick bamboo of bending, the ring section of thick bamboo of bending is connected with the brake pressure disk in proper order respectively; the braking end cover is movably connected with the end part of the force taking input shaft.
The brake friction plate is connected with the input shaft of the power takeoff through a spline and rotates together with the input shaft. When the brake works, the electromagnetic valve controls high-pressure gas to enter the brake cylinder, the brake piston moves under the action of the high-pressure gas to squeeze the brake pressure plate, friction is generated between the brake pressure plate and the brake friction plate by sliding, and a brake moment is formed, so that the rotating speed of the power taking input shaft is reduced. And when the rotation speed of the power take-off input shaft is reduced to the target rotation speed, the power take-off device finishes smooth gear engagement. At this time, the high-pressure gas in the brake cylinder is discharged through the electromagnetic valve, the brake piston returns to the initial position, the friction between the brake pressure plate and the brake friction plate is released, and the brake stops working. Therefore, the rotating speed of the input shaft of the power takeoff can be reduced through friction braking under the condition of higher input rotating speed, the rotating speed difference of the sliding gear sleeve and the input shaft is reduced, and smooth gear engagement is realized.
Further, the bending ring cylinder is provided with a continuous bending part, and the bending part is matched with a plurality of brake discs and brake friction plates which are arranged side by side and in a staggered manner. In general, the outer diameter of the brake pressure plate is larger than that of the brake friction plate, and the bending part of the bending ring cylinder can be embedded between two adjacently arranged brake pressure plates and is arranged opposite to the outer edge of the brake friction plate between the two brake pressure plates.
By adopting the technical scheme, the plurality of brake pressure plates are connected into a whole by utilizing the cooperation of the bending ring cylinder and the brake pressure plates. In the braking process, the braking friction plate is contacted with the friction piece at the side of the braking pressure plate under the action of external force, so that the kinetic energy in the advancing process is converted into friction heat energy, and the braking effect is achieved. In this process, the bending ring cylinder having the continuous bending portion is compressively deformed with the operation of the brake pressure plate and the brake friction plate. After the external force disappears, the bending ring cylinder can quickly recover deformation, and the set distance is recovered between the continuous bending parts, so that the braking friction plate cancels braking, the response speed of equipment can be provided, and defects such as blocking and the like of the braking friction plate are avoided. The bending ring cylinder is sleeved outside the brake pressure plate, has a limiting and positioning effect on the brake pressure plate, the brake friction plate and the like in the brake pressure plate, and can ensure the coaxiality among the components in the braking process. The adjustment of the distance between the adjacent brake pressure plates is realized through the plurality of bending parts which are continuously arranged, so that the synchronism of the plurality of brake pressure plates and the plurality of brake friction plates in the operation process is ensured, and the smooth execution of the braking process is ensured.
Because the setting of the ring section of thick bamboo of bending reduces the inside and outside intercommunication of brake pressure disk, so in the braking process, because the operation of brake piston makes the outside pressure increase of brake pressure disk, and because the setting of the ring section of thick bamboo of bending, the inside pressure of brake pressure disk is less, utilizes the inside and outside atmospheric pressure difference of brake pressure disk can also improve the travel speed of brake piston, promotes braking effect, the realization that can be better is braked the contact effect between pressure disk and the brake friction disc.
According to the embodiment of the invention, through holes are distributed around the brake pressure plate, the bending ring barrel is attached to the edge of the brake pressure plate, the bending ring barrel is V-shaped or U-shaped when passing through the gap of the adjacent brake pressure plate, and the through holes are arranged between the bending ring barrel and the brake friction plate.
The space between the brake pressure plates is in communication with the space within the brake end cap, i.e., the pressure within is uniform. When external pressure exists, namely, when the brake works, the brake friction plates and the brake pressure plates can be contacted, at the moment, the spaces among the plurality of brake pressure plates can be communicated with the external space under the action of the through holes, and when the brake stops working, the communication between the inside and the outside of the brake pressure plates can still be realized. The brake pressure plate is provided with the through hole structure, so that the balance of air pressure among a plurality of brake pressure plates is guaranteed in the bending annular cylinder shape changing process, and the cooperation operation of the brake pressure plate, the brake friction plate, the bending annular cylinder and the like is guaranteed.
The bending part of the bending ring cylinder is arranged to be embedded in a V-shaped or U-shaped structure between the adjacent brake pressure plates, so that the bending ring cylinder has a sufficient deformation range, and the normal realization of the power takeoff function is ensured.
According to one embodiment of the invention, the inner side of the bending ring cylinder is radially extended and provided with the guide ring sheet, the guide ring sheet is attached to the disc surface of the brake pressure disc, and the guide ring sheet is used for covering the through hole.
Therefore, in the process that the bending ring cylinder deforms along with the operation of the brake friction plate, the brake pressure plate and the like, the guide ring plate can adjust the angle due to the deformation of the bending part of the bending ring cylinder, so that the through holes are closed or released, and the flow of gas between the brake pressure plates is regulated.
The guide ring sheets can further ensure the distance between the adjacent braking friction sheets and the horizontal parallelism, so that the coaxiality of the adjacent braking friction sheets and the lateral braking friction sheets thereof is ensured. In the process of bending the ring barrel to deform, the guide ring sheet is subjected to angle change, the free tail end of the guide ring sheet can be in butt joint with the brake pressure plates or the guide ring sheet which is oppositely arranged, and further, the gap between two adjacent brake pressure plates can be prevented from being too small, excessive friction of a brake friction plate in the braking process is avoided, or the bending ring barrel is excessively deformed, and the service life is prolonged.
The arrangement of the guide ring sheets can realize the balance of the gas pressure between the brake pressure plates and the external pressure. Specifically, in the braking process, high-pressure gas enters a braking cylinder, a braking piston moves towards the direction close to a braking end cover under the action of the high-pressure gas, and the pressure of the gas outside the braking piston is increased; at this time, the brake pressure plate is attached to the brake friction plate, and the through holes in the brake pressure plate are opened by the guide ring sheet, so that the gas flow between the brake pressure plates is promoted. When the braking is canceled, high-pressure gas is discharged from the inside of the braking cylinder, the braking piston moves in the direction away from the braking end cover, and the gas pressure at the outer side of the braking piston is reduced; at this time, the through hole on the brake pressure disk can be slowly laminated to the water conservancy diversion ring piece, can realize that brake piston inboard pressure is unanimous with outside pressure, can realize the recovery of pressure, and can realize that the pressure between each adjacent brake pressure disk is unanimous, and then can realize that the interval between each brake pressure disk and the brake friction plate keeps unanimous, can prevent that the inconsistent degree of wear that leads to each brake friction plate of distance between brake pressure disk and the brake friction plate from not inconsistent, can improve the life-span of getting power arresting gear.
According to one embodiment of the invention, a buffer assembly is arranged on one side of the brake piston opposite to the force taking input shaft and is used for assisting the operation of the brake piston in the braking canceling process and relieving the contact between the brake pressure plate and the brake friction plate.
According to one embodiment of the invention, the buffer assembly comprises a first buffer column, one end of the first buffer column is connected with the brake piston, a first buffer blind hole is formed in the other end of the first buffer column, a second buffer blind hole is formed in the power taking input shaft, and the first buffer blind hole and the second buffer blind hole are correspondingly arranged.
According to an embodiment of the invention, the buffer assembly further comprises a first buffer spring, two ends of the first buffer spring are respectively accommodated in the first buffer blind hole and the second buffer blind hole, a rotating column is arranged in the second buffer blind hole, the first buffer spring is connected with the rotating column, and the first buffer spring is fixedly connected with the inner bottom side of the first buffer blind hole.
Therefore, the elastic deformation of the first buffer spring is matched with the reciprocating movement of the brake piston, so that the shock feeling of the operation of the brake piston due to sudden change of the air pressure in the brake cylinder can be weakened, and the stability of the gear engaging process is improved. The arrangement of the first buffer column is matched with the first buffer blind hole and the second buffer blind hole which are oppositely arranged, so that the coaxiality of each part in the power taking input shaft and the power taking braking device can be improved, the accuracy of the braking piston and other parts in the operation process is further ensured, and the offset is prevented.
Compared with the prior art, the invention has the following beneficial effects:
1. the brake pressure plate is matched with the bending ring cylinder, so that coaxiality among a plurality of brake pressure plates and a plurality of brake friction plates in the braking process and synchronism in the operation process can be ensured;
2. Due to the arrangement of the bending ring cylinder, the communication between the inside and the outside of the brake pressure disc is reduced, and in the braking process, the moving speed of the brake piston can be improved by utilizing the air pressure difference between the inside and the outside of the brake pressure disc, so that the braking effect is improved;
3. the structure that the through holes are arranged on the brake pressure plates is beneficial to guaranteeing the balance of air pressure among the brake pressure plates in the bending annular cylinder shape changing process, so that the cooperation operation of the brake pressure plates, the brake friction plates, the bending annular cylinder and the like is guaranteed;
4. The guide ring sheets can further ensure the distance and the horizontal parallelism between the adjacent friction plates, so as to ensure the coaxiality of the adjacent friction plates and the lateral friction plates;
5. the arrangement of the guide ring sheets can realize the balance of the gas pressure between the brake pressure plates and the external pressure.
Drawings
FIG. 1 is a schematic cross-sectional view of a power take-off structure of an AMT transmission supporting power take-off in embodiment 1;
FIG. 2 is a schematic illustration of the engagement of a brake pad with a brake pressure plate;
FIG. 3 is an enlarged schematic view of FIG. 1 at A;
FIG. 4 is a schematic cross-sectional view of a power take-off structure of an AMT transmission supporting power take-off in embodiment 2;
Fig. 5 is an enlarged schematic view of B in fig. 4.
Reference numerals: the power taking input shaft 1, the second buffering blind hole 11, the first buffering spring 12, the rotating column 13, the third buffering blind hole 14, the positioning column 15, the sliding gear sleeve 2, the power taking braking device 3, the braking piston 31, the braking end cover 32, the braking pressure plate 33, the braking friction plate 34, the bending ring cylinder 35, the through hole 36, the flow guiding ring plate 37, the buffering component 4, the first buffering column 41, the first buffering blind hole 42, the second buffering column 43, the fourth blind hole 44, the fixed ring 51, the buffering ring 52, the ball 53, the ring groove 54 and the bearing 55.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the specific embodiments and the attached drawings:
Example 1:
as shown in fig. 1-3, a power takeoff structure of an AMT transmission for supporting driving power take-off comprises a power take-off input shaft 1, a sliding tooth sleeve 2 is arranged at one end of the power take-off input shaft 1 at intervals, a power take-off brake device 3 is arranged at the end part, close to the sliding tooth sleeve 2, of the power take-off input shaft 1, the power take-off brake device 3 comprises a brake piston 31, a brake end cover 32 is arranged at one side of the brake piston 31 at intervals, and the brake end cover 32 is movably connected to the end part of the power take-off input shaft 1. And at least three brake pressure plates 33 arranged at intervals are arranged between the brake piston 31 and the brake end cover 32, brake friction plates 34 are arranged between adjacent brake pressure plates 33, and the brake friction plates 34 are fixedly connected with the power input shaft 1 through splines and rotate along with the input shaft.
When the brake works, the electromagnetic valve controls high-pressure gas to enter the brake cylinder, the brake piston 31 moves under the action of the high-pressure gas, the brake pressure plate 33 is extruded, friction is generated by sliding friction between the brake pressure plate 33 and the brake friction plate 34, and a brake moment is formed, so that the rotating speed of the power taking input shaft 1 is reduced. When the rotation speed of the power take-off input shaft 1 is reduced to the target rotation speed, the power take-off device finishes the smooth gear. At this time, the high-pressure gas in the brake cylinder is discharged through the electromagnetic valve, the brake piston 31 returns to the initial position, the friction between the brake pressure plate 33 and the brake friction plate 34 is released, and the brake stops operating. Therefore, the rotation speed of the input shaft of the power takeoff can be reduced through friction braking under the condition of higher input rotation speed, the rotation speed difference of the sliding gear sleeve 2 and the input shaft is reduced, and smooth gear engagement is realized.
The outside of the brake pressure plate 33 is sleeved with a bending ring cylinder 35, and the bending ring cylinders 35 are respectively connected with the brake pressure plate 33 in sequence. The brake pressure plate 33 is circumferentially provided with through holes 36, the bending ring cylinder 35 is attached to the edge of the brake pressure plate 33, the bending ring cylinder 35 is V-shaped or U-shaped when passing through the gap of the adjacent brake pressure plate 33, and the through holes 36 are arranged between the bending ring cylinder 35 and the brake friction plate 34. That is, the bending ring 35 has a continuous bending portion, and the bending portion is engaged with the brake discs and the brake friction plates 34 which are arranged side by side and alternately. In general, the outer diameter of the brake pressure plate 33 is larger than the outer diameter of the brake friction plate 34, and the bent portion of the bent ring tube 35 can be inserted between two brake pressure plates 33 disposed adjacently and disposed opposite to the outer edge of the brake friction plate 34 between the two brake pressure plates 33.
The plurality of brake pressure plates 33 are integrally connected by the engagement of the bending ring 35 with the brake pressure plates 33. In the braking process, the braking friction plate 34 is contacted with the friction piece at the side of the braking pressure plate 33 under the action of external force, so that the kinetic energy in the running process is converted into friction heat energy, and the braking effect is achieved. In this process, the bending ring 35 having the continuous bending portion is compressively deformed in accordance with the operation of the brake pressure plate 33 and the brake friction plate 34. After the external force disappears, the bending ring cylinder 35 can quickly recover deformation, and the set distance is recovered between the continuous bending parts, so that the braking friction plate 34 cancels braking, the response speed of equipment can be provided, and defects such as locking and the like of the braking friction plate 34 are avoided. The bending ring 35 is sleeved outside the brake pressure plate 33, has a positioning limiting effect on the brake pressure plate 33, the brake friction plate 34 and the like in the brake pressure plate 33, and can ensure the coaxiality among the components in the braking process. The adjustment of the distance between the adjacent brake pressure plates 33 is realized through a plurality of bending parts which are arranged continuously, so that the synchronism of the brake pressure plates 33 and the brake friction plates 34 in the operation process is ensured, and the smooth execution of the braking process is ensured.
Due to the arrangement of the bending ring cylinder 35, the communication between the inside and the outside of the brake pressure plate 33 is reduced, so that in the braking process, the pressure outside the brake pressure plate 33 is increased due to the operation of the brake piston 31, and due to the arrangement of the bending ring cylinder 35, the pressure inside the brake pressure plate 33 is smaller, the moving speed of the brake piston 31 can be improved by utilizing the air pressure difference between the inside and the outside of the brake pressure plate 33, the braking effect is improved, and the contact effect between the brake pressure plate 33 and the brake friction plate 34 can be better realized.
The arrangement of the bending ring cylinder 35 can realize the sealing of a plurality of brake pressure plates 33 on the one hand, and can prevent fragments or other impurities generated by contact friction between the brake friction plate 34 and friction pieces on the side of the brake pressure plates 33 from being transferred to the outer side of the power taking braking device 3, so that the protection of the sliding gear sleeve 2 can be realized, and the sliding gear sleeve 2 is prevented from being irreversibly damaged in the moving process.
In addition, the bending ring 35 can provide a certain elastic force due to the deformation, and the speed of restoring the brake pressure plate 33, the brake friction plate 34 and the like to the original position can be increased in the process of canceling the braking. Namely, when the speed of the input shaft rotating shaft of the power takeoff is not required to be reduced by friction, the brake piston 31 is not subjected to the action of high-pressure air, in the rebound process, the bending ring cylinder 35 can achieve the effect of rapidly separating the brake pressure plate 33 from the brake friction plate 34, the response speed is provided, and the service lives of the brake friction plate 34 and the brake pressure plate 33 can be prolonged.
Since the brake pressure plate 33 is circumferentially provided with the plurality of through holes 36, the space between the brake pressure plates 33 is communicated with the space in the brake end cover 32, i.e., the internal pressure is uniform. When there is an external pressure, that is, when the brake is operated, contact is made between the brake friction plate 34 and the brake pressure plate 33, at this time, the space between the plurality of brake pressure plates 33 is communicated with the external space by the through holes 36, and communication is still achieved between the inside and the outside of the brake pressure plate 33 when the brake is stopped. The structure that the through holes 36 are arranged on the brake pressure plate 33 is beneficial to guaranteeing the balance of air pressure among the brake pressure plates 33 in the deformation process of the bending ring cylinder 35, so that the cooperation operation of the brake pressure plate 33, the brake friction plate 34, the bending ring cylinder 35 and the like is guaranteed.
In this way, during the braking process, the bending ring 35 can be utilized to limit the coaxiality of the plurality of brake pressure plates 33, and the through holes 36 are utilized to realize the temperature balance and the air pressure balance among the plurality of brake pressure plates 33, so that the normal operation of the brake pressure plates 33 and the brake friction plates 34 is ensured; in addition, in the process that the bending ring cylinder 35 deforms along with the operation of the brake friction plate 34 and the like, the air flow in the bending ring cylinder 35 flows between the plurality of brake pressure plates 33 through the through holes 36, and when the air pressure changes, the air flow near the bending ring cylinder 35 can quickly pass through the through holes 36, that is, the air pressure near the bending ring cylinder 35 changes sensitively, and the response speed of the bending part of the bending ring cylinder 35 can be improved.
The bending part of the bending ring cylinder 35 is arranged to be embedded in a V-shaped or U-shaped structure between the adjacent brake pressure plates 33, so that the bending ring cylinder 35 has a sufficient deformation range, and the normal realization of the power takeoff function is ensured.
In addition, the inside radial extension of the ring section of thick bamboo 35 of bending is equipped with the water conservancy diversion ring piece 37, and the water conservancy diversion ring piece 37 laminating braking pressure disk 33 quotation sets up, and the water conservancy diversion ring piece 37 is used for covering through-hole 36.
Therefore, in the process that the bending ring cylinder 35 deforms along with the operation of the brake friction plate 34, the brake pressure plate 33 and the like, the guide ring sheet 37 can adjust the angle due to the deformation of the bending part of the bending ring cylinder 35, so that the through holes 36 are closed or released, and the flow of the gas between the brake pressure plates 33 is adjusted.
The use of the deflector ring 37 also further ensures the spacing and horizontal parallelism between adjacent brake pads 34, and thus the coaxiality of adjacent friction pads with the brake pads 34 on their sides. In the process of deformation of the bending ring cylinder 35, the angle of the guide ring sheet 37 changes, the free tail end of the guide ring sheet can be abutted with the brake pressure plates 33 or the guide ring sheet 37 which is oppositely arranged, and further, the gap between two adjacent brake pressure plates 33 can be prevented from being too small, excessive friction of the brake friction sheet 34 in the braking process is avoided, or the deformation of the bending ring cylinder 35 is excessive, and the service life is prolonged.
The deflector ring 37 is provided to balance the gas pressure between the brake disks 33 and the external pressure. Specifically, during the braking process, high-pressure gas enters the braking cylinder, the braking piston 31 moves towards the direction close to the braking end cover 32 under the action of the high-pressure gas, and the gas pressure at the outer side of the braking piston 31 is increased; at this time, the brake pressure plate 33 is bonded to the brake friction plate 34, and the through holes 36 in the brake pressure plate 33 are opened by the deflector ring plates 37, so that the gas flow between the brake pressure plates 33 is promoted. When the braking is canceled, high-pressure gas is discharged from the inside of the braking cylinder, the braking piston 31 moves away from the braking end cover 32, and the gas pressure outside the braking piston 31 is reduced; at this time, the guide ring piece 37 can slowly attach to the through hole 36 on the brake pressure plate 33, so that the pressure intensity of the inner side of the brake piston 31 is consistent with the pressure intensity of the outer side of the brake piston 31, the pressure intensity can be recovered, the pressure intensity between each two adjacent brake pressure plates 33 is consistent, the distance between each brake pressure plate 33 and each brake friction plate 34 can be kept consistent, the inconsistent wear degree of each brake friction plate 34 caused by inconsistent distance between the brake pressure plate 33 and the brake friction plate 34 can be prevented, and the service life of the power taking braking device 3 can be prolonged.
The guide ring piece 37 is of a ring structure, in the deformation process of the bending ring barrel 35, the guide ring piece 37 can form intervals to the adjacent brake pressure plates 33, the stress balance of the brake pressure plates 33 is ensured, the parallelism among the brake pressure plates 33 can be improved, and one or more of the brake pressure plates 33 are prevented from being laterally deflected due to unbalanced stress. In addition, the free end of the guide ring 37 is disposed towards the brake friction plate 34, so that the operation range of the brake friction plate 34 can be limited, and the axial deviation of the brake friction plate relative to the power input shaft 1 can be avoided, that is, the coaxiality between the brake friction plates 34 and the coaxiality between the brake friction plate 34 and the brake pressure plate 33 and the power input shaft 1 in the operation process are ensured.
Further, the deflector ring sheet 37 is made of memory metal. Because a large amount of heat is generated in the process of contact friction between the brake friction plate 34 and the side of the brake pressure plate 33, the temperature change in the brake pressure plates 33 is large in the braking process, so that the guide ring piece 37 processed by the memory metal can be subjected to reversible shape change due to the change of ambient temperature, and the through holes 36 on the brake pressure plates 33 can be closed or released. Specifically, during braking, when the brake friction plate 34 contacts with the side of the brake pressure plate 33, a large amount of heat is generated, the temperature between the plurality of brake pressure plates 33 is increased, the through holes 36 are opened by the guide ring plates 37, so that hot air between the brake pressure plates 33 is discharged, the heat exchange effect between the brake pressure plates 33 is improved, and under the condition that the temperature is increased to a certain level, the through holes 36 are opened by the guide ring plates 37, the friction is maximized, the heat dissipation function is provided, and the service life of the friction plate can be prolonged; when the braking friction plate 34 is used for canceling braking, friction between the braking friction plate 34 and the braking pressure plates 33 is weakened or even disappears, the temperature between the braking pressure plates 33 is reduced, the guide ring sheet 37 is restored to be the original state, namely, the guide ring sheet covers the through holes 36, or the included angle between the guide ring sheet and the braking pressure plates 33 is reduced, the speed of gas circulation between the braking pressure plates 33 is reduced, a certain sealing effect can be realized among the braking pressure plates 33, and the air pressure in different areas inside the braking pressure plates 33 and the air pressure outside the braking pressure plates 33 are facilitated to be consistent.
The side of the brake piston 31 opposite to the force taking input shaft 1 is provided with a buffer assembly 4 for assisting the operation of the brake piston 31 in the process of canceling braking, and the contact between the brake pressure plate 33 and the brake friction plate 34 is canceled.
Specifically, the buffer assembly 4 includes a first buffer column 41, one end of the first buffer column 41 is connected with the brake piston 31, a first buffer blind hole 42 is formed at the other end of the first buffer column 41, a second buffer blind hole 11 is formed in the power input shaft 1, the first buffer blind hole 42 and the second buffer blind hole 11 are correspondingly formed, the buffer assembly 4 further includes a first buffer spring 12, two ends of the first buffer spring 12 are respectively contained in the first buffer blind hole 42 and the second buffer blind hole 11, a rotating column 13 is arranged in the second buffer blind hole 11, the first buffer spring 12 is connected with the rotating column 13, and the first buffer spring 12 is fixedly connected with the inner bottom side of the first buffer blind hole 42.
Therefore, the elastic deformation of the first buffer spring 12 is matched with the reciprocating movement of the brake piston 31, so that the shock feeling of the operation of the brake piston 31 due to the sudden change of the air pressure in the brake cylinder can be weakened, and the stability in the gear engaging process can be improved. The setting of first buffer post 41, the relative first buffer blind hole 42 that sets up of cooperation, second buffer blind hole 11 can improve the axiality of each part in power input shaft 1 and the power arresting gear 3, and then guarantees the degree of accuracy of parts operation in-process such as brake piston 31, prevents to take place the skew to can prevent to slide tooth cover 2 and take place to beat defects such as tooth in the meshing in-process with power input shaft 1, extension gear life guarantees the working accuracy of tooth cover 2 in the power taking process.
Under the cooperation of the rotating column 13 and the first buffer spring 12, coaxiality of each component in the power taking input shaft 1 and the power taking braking device 3 is improved, so that pressure intensity among a plurality of braking pressure plates 33 is more balanced, synchronous operation of the braking pressure plates 33 and the braking friction plates 34 in the braking process is realized, that is, simultaneous compaction or simultaneous loosening is realized, braking smoothness is improved, jamming is avoided, and abrasion unbalance among the braking friction plates 34 can be prevented.
Example 2:
As shown in fig. 4 and 5, a power take-off structure of an AMT transmission supporting a power take-off of a traveling crane according to another embodiment of the present invention is different from that of example 1 in that,
The force taking input shaft 1 is provided with a third buffer blind hole 14 at one end opposite to the brake piston 31, a positioning column 15 is coaxially arranged in the third buffer blind hole 14, and one end of the positioning column 15 is fixedly connected with the force taking input shaft 1. The bottom side of the third buffering blind hole 14 is provided with a coaxial assembly, the coaxial assembly comprises a fixed ring 51, one side of the fixed ring 51 is fixedly connected with the power input shaft 1, the other side of the fixed ring 51 is provided with a buffering ring 52, a ball 53 is arranged between the buffering ring 52 and the fixed ring 51, a bearing 55 is arranged between the buffering ring 52 and the positioning column 15, an annular groove 54 is arranged on the side of the positioning column 15, the bearing 55 is embedded in the annular groove 54, and the outer side of the bearing 55 is in butt joint with the inner wall of the buffering ring 52. The brake piston 31 is close to the side of the power input shaft 1 and is provided with a second buffer column 43, the end part of the second buffer column 43 is coaxially provided with a fourth blind hole 44, the fourth blind hole 44 accommodates the positioning column 15, the end part of the second buffer column 43 is connected with one end of the second buffer spring 16, and the other end of the second buffer spring 16 is connected with the buffer ring 52.
In this way, in the rotation process of the power input shaft 1, the positioning column 15 and the fixed ring 51 are driven to rotate synchronously, and the fixed ring 51 on one side of the ball 53 rotates, so that the buffering of the buffer ring 52 and other components can be realized by the rotation driven by the fixed ring 51. The rotation of the positioning column 15 drives the bearing 55 sleeved outside to rotate, so that the coaxiality of the buffer ring 52 and the positioning column 15 can be improved. The coaxiality between the brake piston 31, the brake pressure plate 33 and other parts and the force taking input shaft 1 in the operation process can be further improved by matching with the second buffer spring 16, and particularly, the parallelism in the operation process of the brake pressure plate 33 and the brake friction plate 34 can be improved by matching with the limiting effect of the bending ring cylinder 35 on the brake pressure plate 33 and the like, so that the abrasion speed of certain positions of the brake friction plate 34 is prevented from being fast, the abrasion speed of certain positions is prevented from being slow in the friction process of the brake pressure plate 33 and the brake friction plate 34, and the service life of the friction plate can be prolonged.
The arrangement of the balls 53 can reduce the impact force of the buffer ring 52 on the fixed ring 51 and other structures in the compression deformation process of the second buffer spring 16, and the rotation of the balls 53 consumes part of compression energy, so that the stability of the buffer ring 52 is improved, and the change efficiency of the rotation speed of the power taking input shaft 1 is improved, namely the response speed of the power taking input shaft 1 to the operation process of the power taking braking device 3 can be improved.
While the foregoing embodiments have been described in detail in connection with the embodiments of the invention, it should be understood that the foregoing embodiments are merely illustrative of the invention and are not intended to limit the invention, and any modifications, additions or substitutions made therein without departing from the spirit and scope of the invention.
Claims (4)
1. The utility model provides a power takeoff structure of AMT derailleur support driving power of taking, includes power take-off input shaft (1), power take-off input shaft (1) one end is furnished with slip tooth cover (2), its characterized in that, power take-off input shaft (1) are close to the tip of slip tooth cover (2) and are equipped with power take-off brake equipment (3), power take-off brake equipment (3) include brake piston (31), brake piston (31) one side is equipped with brake end cover (32), be equipped with between brake piston (31) and brake end cover (32) and be no less than brake pressure disk (33) that three interval set up, be equipped with between adjacent brake pressure disk (33) brake friction disc (34), brake friction disc (34) are linked firmly with power take-off input shaft (1), brake pressure disk (33) outside encircles the cover and is established and bend ring section of thick bamboo (35) are connected gradually with brake pressure disk (33) respectively;
The brake end cover (32) is movably connected to the end part of the force taking input shaft (1);
The brake pressure plate (33) is circumferentially provided with through holes (36), the bending ring cylinder (35) is attached to the edge of the brake pressure plate (33), the bending ring cylinder (35) is V-shaped or U-shaped when passing through gaps of the adjacent brake pressure plates (33), and the through holes (36) are arranged on the brake pressure plate (33) between the bending ring cylinder (35) and the brake friction plate (34);
The inside radial extension of a bending ring section of thick bamboo (35) is equipped with water conservancy diversion ring piece (37), water conservancy diversion ring piece (37) laminating brake pressure disk (33) quotation sets up, water conservancy diversion ring piece (37) are used for covering through-hole (36).
2. The power take-off structure for supporting driving power take-off of an AMT transmission according to claim 1, wherein said brake piston (31) is provided with a buffer assembly (4) on a side opposite to said power take-off input shaft (1).
3. The power takeoff structure supporting driving power taking of the AMT transmission according to claim 2, wherein the buffer assembly (4) comprises a first buffer column (41), one end of the first buffer column (41) is connected with a brake piston (31), a first buffer blind hole (42) is formed in the other end of the first buffer column (41), a second buffer blind hole (11) is formed in the power taking input shaft (1), and the first buffer blind hole (42) and the second buffer blind hole (11) are correspondingly arranged.
4. The power takeoff structure supporting driving power taking of the AMT transmission according to claim 3, wherein the buffer assembly (4) further comprises a first buffer spring (12), two ends of the first buffer spring (12) are respectively contained in a first buffer blind hole (42) and a second buffer blind hole (11), a rotating column (13) is arranged in the second buffer blind hole (11), the first buffer spring (12) is connected with the rotating column (13), and the first buffer spring (12) is fixedly connected with the inner bottom side of the first buffer blind hole (42).
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| CN202410148723.XA CN117685315B (en) | 2024-02-02 | 2024-02-02 | Power takeoff structure of AMT transmission supporting driving power take-off |
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| CN214197211U (en) * | 2020-11-24 | 2021-09-14 | 中国重汽集团大同齿轮有限公司 | First-stage gear transmission friction plate power takeoff |
| CN215567548U (en) * | 2021-05-27 | 2022-01-18 | 玉环威宇汽车部件有限公司 | Electronic parking system brake piston assembly |
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| CN103061669A (en) * | 2013-01-21 | 2013-04-24 | 中煤科工集团西安研究院 | Large-through-hole power head with brake function of coal mine directional drilling machine |
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| CN117685315A (en) | 2024-03-12 |
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