CN210196290U - Direct-connection multi-piece friction power takeoff - Google Patents
Direct-connection multi-piece friction power takeoff Download PDFInfo
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- CN210196290U CN210196290U CN201920565624.6U CN201920565624U CN210196290U CN 210196290 U CN210196290 U CN 210196290U CN 201920565624 U CN201920565624 U CN 201920565624U CN 210196290 U CN210196290 U CN 210196290U
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- power takeoff
- friction
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- input shaft
- spline connecting
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Abstract
The utility model provides a directly link multi-disc friction power takeoff belongs to mechanical technical field. It has solved the problem that current friction power takeoff transmission efficiency is low. This directly link multi-disc friction power takeoff, just including being the shell of tube-shape the both ends of shell are equipped with an input port and an delivery outlet respectively, and the one end of wearing to be equipped with an input shaft and input shaft in the shell stretches out in the input port, and the one end of wearing to be equipped with an output shaft and output shaft in the shell stretches out in the delivery outlet, the one end of output shaft is equipped with the internal spline connecting portion that the coaxial cover was located on the input shaft tip, the circumference outside of input shaft is equipped with the external spline connecting portion that corresponds with the internal spline connecting portion, is equipped with the friction disc unit between internal spline connecting portion and the external spline connecting portion, the one end that the output shaft was kept away from to the input shaft just is located the shell endotheca and is equipped with the piston along shell inner wall translation.
Description
Technical Field
The utility model belongs to the technical field of machinery, a directly link multi-disc friction power takeoff is related to.
Background
The Power takeoff (abbreviated as PTO), which is one or more sets of transmission gears, is also called a Power takeoff, and is generally composed of a gear box, a clutch, and a controller, and is connected to a low-gear or an auxiliary box output shaft of the transmission box to output Power to an external working device, such as a lift pump.
Chinese patent document discloses a power takeoff with a friction plate [ application number: 201620971177.0], comprising: a cylinder body, inside which an output shaft is supported by a bearing; the output shaft is of a hollow structure, the hollow structure extends from the middle part of the output shaft to the tail end of the output shaft to form an opening, and an air inlet is also formed in the position, corresponding to the opening of the output shaft, on the cylinder body; the middle part of the output shaft is sleeved with a piston sleeve with a backward opening and a piston ring positioned in the piston sleeve, and a piston ring air chamber is formed between the piston ring and the piston sleeve; the piston ring can slide back and forth along the axis direction of the output shaft; the middle part of the output shaft is provided with an air outlet hole which is communicated with the hollow structure and the air chamber of the piston ring; an output gear is sleeved on the output shaft at the position of the rear end of the piston ring, and the circumference of the output gear extends forwards to form an extension section; a gap is reserved between the extension section and the output shaft; a friction plate group sleeved on the output shaft is arranged at the gap; the friction plate set comprises a plurality of dynamic friction plates and static friction plates which are alternately arranged; the dynamic friction plate is connected with the output gear through an external spline, and the static friction plate is connected with the output shaft through an internal spline; the rear end of the piston ring is opposite to the front end of the friction plate group; the output shaft is also provided with a spring which is tightly contacted with the rear end of the piston ring; the cylinder body is also provided with an input gear which is meshed with the output gear and is used for inputting external power.
The power takeoff can normally shift the speed changer without interrupting power during working, and meanwhile, the structural form of the friction plate set is adopted, so that the whole structure is compact, the service life is long, and the failure rate of the speed changer can be reduced.
Although the above solution has the above advantages, the above solution still has the following problems:
1. the whole internal structure is complicated, the occupied space is large, the assembly is not facilitated, and the sealing requirement is higher.
2. The power takeoff is driven by the input shaft, the transmission gear and the output gear, so that the internal energy consumption is high, and the transmission efficiency is low.
3. The inlet port sets up in the power takeoff tip, has increased the horizontal occupation space of power takeoff, does not utilize the installation of power takeoff.
4. The power takeoff uses more materials for production and has high cost.
5. When the pneumatic piston operates, a certain force is always generated on the input shaft, so that the rotating friction of the input shaft is high, and the transmission efficiency is poor.
Disclosure of Invention
The utility model aims at the above-mentioned problem that prior art exists, provide a directly link multi-disc friction power takeoff.
The purpose of the utility model can be realized by the following technical proposal:
a direct-connection multi-piece friction power takeoff comprises a cylindrical shell, wherein an input port and an output port are respectively arranged at two ends of the shell, an input shaft penetrates through the shell, one end of the input shaft extends out of the input port, an output shaft penetrates through the shell, one end of the output shaft extends out of the output port, one end of the output shaft is provided with an internal spline connecting part coaxially sleeved on the end part of the input shaft, the circumferential outer side of the input shaft is provided with an external spline connecting part corresponding to the internal spline connecting part, a friction sheet unit is arranged between the inner spline connecting part and the outer spline connecting part, one end of the input shaft, which is far away from the output shaft, is positioned in the shell and is sleeved with a piston which translates along the inner wall of the shell, the inner side of the piston is embedded with a movable bearing which is sleeved on the circumferential outer side of the input shaft, and a piston top plate for pressing the friction sheet unit is arranged between the movable bearing and the friction sheet unit.
In the direct-connection multi-piece friction power takeoff, an air cavity is formed between one side of the piston, which is far away from the movable bearing, and the inner wall of the shell, an air inlet communicated with the air cavity is formed in the side portion of the shell, and a pneumatic sealing structure is arranged between one side of the piston, which is far away from the movable bearing, and the inner wall of the shell.
In the direct-connection multi-piece friction power takeoff, a positioning hole for clamping the end part of the input shaft is formed in the inner spline connecting part, and a first input bearing is arranged in the positioning hole and on the circumferential outer side of the end part of the input shaft.
In the above-mentioned direct-connected multi-plate friction power takeoff, the friction plate unit includes an outer friction plate connected with the inner spline connecting portion, and an inner friction plate connected with the outer spline connecting portion, and the outer friction plate and the inner friction plate are sequentially stacked in a staggered manner.
In the direct-connection multi-piece friction power takeoff, a return spring is arranged between the piston top plate and the friction piece unit, one end of the return spring abuts against one side of the external spline connecting part, and the other end of the return spring abuts against the piston top plate.
In the direct-connection multi-piece friction power takeoff, one side of the external spline connecting part, which is far away from the piston top plate, is connected with an annular limiting block.
In the direct-connection multi-piece friction power takeoff, an annular convex part extending inwards is arranged in the shell and at the input port, an annular convex shoulder connected with the inner wall of the shell is arranged at one end, close to the movable bearing, of the piston, and a cylindrical part extending into the inner side of the annular convex part is arranged at one end, far away from the movable bearing, of the piston.
In the direct-connection multi-piece friction power takeoff, the pneumatic sealing structure comprises a first sealing groove arranged on the annular convex part and a first pneumatic sealing ring embedded in the first sealing groove, and the first pneumatic sealing ring is tightly attached to the cylindrical part.
In the direct-connection multi-piece friction power takeoff, the pneumatic sealing structure further comprises a second sealing groove arranged on the annular convex shoulder and a second pneumatic sealing ring embedded in the second sealing groove, and the second pneumatic sealing ring is tightly attached to the inner wall of the shell.
In the above direct-connection multi-piece friction power takeoff, at least one output bearing is arranged at the position, located at the output port, on the circumferential outer side of the output shaft.
Compared with the prior art, the direct-connection multi-piece friction power takeoff has the following advantages:
1. the direct-connection multi-piece friction power takeoff is simple in structure, easy to manufacture and assemble, capable of reducing the material consumption for production and assembly of the power takeoff and reducing the production cost.
2. This directly link multi-disc friction power takeoff through the mode of coaxial directly linking, energy loss when having reduced the transmission increases transmission efficiency, has reduced whole occupation space moreover by a wide margin, does benefit to the installation of power takeoff.
3. This directly link inlet port of multi-disc friction power takeoff sets up in the side, has reduced the horizontal occupation space of power takeoff, is unfavorable for the installation of power takeoff.
4. This directly link good and easy control of leakproofness of multi-disc friction power takeoff.
5. This directly link multi-disc friction power takeoff adds movable bearing between piston and piston roof, increases the intensity of internal connection structure, when reducing the piston and remove with the input shaft between the friction, more does benefit to the rotation of input shaft.
Drawings
FIG. 1 is a schematic diagram of the present direct-connected multi-plate friction power takeoff.
FIG. 2 is a schematic diagram of the upper gear of the present direct-connected multi-plate friction power takeoff.
FIG. 3 is a schematic view of a friction plate unit.
In the figure, 1, a housing; 11. an air inlet; 12. an annular shoulder; 13. a first pneumatic sealing ring; 2. an input shaft; 21. an external spline connection; 22. an input bearing I; 23. an annular stop block; 3. an output shaft; 31. an internal spline connection; 32. positioning holes; 33. an output bearing; 4. a friction plate unit; 41. an outer friction plate; 42. an inner friction plate; 5. a piston; 51. moving the bearing; 52. a piston top plate; 53. an air cavity; 54. an annular protrusion; 55. a cylindrical portion; 56. a pneumatic sealing ring II; 6. and a return spring.
Detailed Description
As shown in fig. 1-2, this directly link multi-disc friction power takeoff, including being the shell 1 of tube-shape just the both ends of shell 1 are equipped with an input port and an output port respectively, wear to be equipped with an input shaft 2 and the one end of input shaft 2 in shell 1 and stretch out in the input port, wear to be equipped with an output shaft 3 and the one end of output shaft 3 in shell 1 and stretch out in the output port, the one end of output shaft 3 is equipped with the internal spline connecting portion that the coaxial cover was located on the input shaft 2 tip, the circumference outside of input shaft 2 is equipped with the external spline connecting portion 21 that corresponds with the internal spline connecting portion, be equipped with the locating hole that supplies the 2 tip cards of input shaft to go into in the internal spline connecting portion, the circumference outside that just is located the input shaft 2 tip in.
The input shaft 2 is clamped in a positioning hole in the output shaft 3 to realize coaxial rotation.
The first input bearing 22 is arranged to enable the input shaft 2 and the output shaft 3 to be separated in a rotating mode, and one end, close to the output shaft 3, of the input shaft 2 achieves smooth rotation.
And a second input bearing is embedded at the position, located at the input port, of the circumferential outer side of the input shaft 2, and the input shaft 2 rotates more stably and reliably through the matching of the first input bearing 22 and the second input bearing.
And at least one output bearing is arranged on the circumferential outer side of the output shaft 3 and positioned at the output port.
Through the cooperation of the input bearing I22 and the output bearing, the output shaft 3 rotates more stably and reliably.
A friction plate unit 4 is provided between the inner spline connecting portion and the outer spline connecting portion 21.
Through with input shaft 2 and 3 coaxial settings of output shaft, reduced whole occupation space, reduce power takeoff inner structure's complexity, convenient assembling.
Set up friction disc unit 4, compare in gear drive mode, occupation space is littleer, and transmission energy consumes much less, and transmission efficiency is higher.
The input shaft 2 is far away from the one end of output shaft 3 and is located the shell 1 endotheca and is equipped with the piston 5 along shell 1 inner wall translation, the inboard of piston 5 inlays and is equipped with the removal bearing 51 of cover locating the input shaft 2 circumference outside.
The movable bearing 51 is embedded in the inner side of the piston 5, so that the overall structural strength is enhanced, the friction between the piston 5 and the input shaft 2 during movement is reduced, and the transmission efficiency is increased.
A piston top plate 52 for pressing the friction plate unit 4 is provided between the movable bearing 51 and the friction plate unit 4.
And a return spring 6 is arranged between the piston top plate 52 and the friction plate unit 4, one end of the return spring 6 is abutted against one side of the external spline connecting part 21, and the other end of the return spring is abutted against the piston top plate 52.
One side of the external spline connecting part 21, which is far away from the piston top plate 52, is connected with an annular limiting block 23.
An annular limiting block 23 is arranged to prevent the friction plate unit 4 from excessively moving to one side due to stress and increase the extrusion degree of the friction plate unit 4.
When the gear is shifted up, the piston top plate 52 is forced to move towards one side of the friction plate unit 4 and presses the friction plate unit 4, so that the friction plate unit 4 forms a whole, and the transmission connection of the input shaft 2 and the output shaft 3 is realized.
When the shift is not shifted or is finished, the force applied to the friction plate unit 4 is gradually reduced, the connection is disconnected, and the return spring 6 drives the piston top plate 52 to move toward the piston 5.
An air cavity 53 is arranged between one side of the piston 5 far away from the moving bearing 51 and the inner wall of the shell 1, and an air inlet 11 communicated with the air cavity 53 is arranged on the side of the shell 1.
An air inlet 11 is arranged at the side part of the shell 1, so that the transverse occupied space of the device is reduced.
And a pneumatic sealing structure is arranged between one side of the piston 5 far away from the moving bearing 51 and the inner wall of the shell 1.
And a pneumatic sealing structure is arranged, so that the pneumatic driving efficiency of the device is improved.
An annular convex part 54 extending inwards is arranged at the input port in the shell 1, an annular convex shoulder 12 connected with the inner wall of the shell 1 is arranged at one end of the piston 5 close to the movable bearing 51, and a cylindrical part 55 extending into the inner side of the annular convex part 54 is arranged at one end of the piston 5 far away from the movable bearing 51.
The pneumatic sealing structure comprises a first sealing groove arranged on the annular convex part 54 and a first pneumatic sealing ring 13 embedded in the first sealing groove, and the first pneumatic sealing ring 13 is tightly attached to the cylindrical part 55.
The sealing performance is better due to the soft contact sealing structure between the cylindrical part 55 and the first pneumatic sealing ring 13.
The pneumatic sealing structure further comprises a second sealing groove arranged on the annular shoulder 12 and a second pneumatic sealing ring 56 embedded in the second sealing groove, and the second pneumatic sealing ring 56 is tightly attached to the inner wall of the shell 1.
And the sealing performance is better through the soft contact sealing structure between the inner wall of the shell 1 and the second pneumatic sealing ring 56.
As shown in fig. 3, the friction plate unit 4 includes an outer friction plate connected to the inner spline connecting portion, and an inner friction plate 42 connected to the outer spline connecting portion 21, and the outer friction plate 41 and the inner friction plate 42 are alternately stacked in this order.
By sequentially staggering and laminating the outer friction plates 41 and the inner friction plates 42, the connection is tighter and more reliable, and the transmission efficiency is higher.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. A direct-connection multi-piece friction power takeoff is characterized by comprising a cylindrical shell (1), wherein an input port and an output port are respectively arranged at two ends of the shell (1), an input shaft (2) penetrates through the shell (1), one end of the input shaft (2) extends out of the input port, an output shaft (3) penetrates through the shell (1), one end of the output shaft (3) extends out of the output port, an inner spline connecting portion (31) coaxially sleeved on the end portion of the input shaft (2) is arranged at one end of the output shaft (3), an outer spline connecting portion (21) corresponding to the inner spline connecting portion (31) is arranged on the circumferential outer side of the input shaft (2), a friction piece unit (4) is arranged between the inner spline connecting portion (31) and the outer spline connecting portion (21), a piston (5) which can translate along the inner wall of the shell (1) is sleeved at one end, far away from the output shaft (3), of the input shaft (2), and is positioned in the shell (1), a movable bearing (51) sleeved on the circumferential outer side of the input shaft (2) is embedded on the inner side of the piston (5), and a piston top plate (52) used for pressing the friction plate unit (4) is arranged between the movable bearing (51) and the friction plate unit (4).
2. The direct-connection multi-piece friction power takeoff device as claimed in claim 1, wherein an air cavity (53) is formed between one side of the piston (5) far away from the moving bearing (51) and the inner wall of the housing (1), the housing (1) is provided with an air inlet (11) communicated with the air cavity (53), and a pneumatic sealing structure is formed between one side of the piston (5) far away from the moving bearing (51) and the inner wall of the housing (1).
3. The direct-connection multi-plate friction power takeoff device as claimed in claim 1, wherein a positioning hole (32) for the end part of the input shaft (2) to be clamped is formed in the internal spline connecting part (31), and a first input bearing (22) is arranged in the positioning hole (32) and located on the circumferential outer side of the end part of the input shaft (2).
4. A direct-coupled multi-plate friction power takeoff according to claim 1, wherein the friction plate unit (4) comprises an outer friction plate (41) connected to the inner spline connecting portion (31), and an inner friction plate (42) connected to the outer spline connecting portion (21), the outer friction plate (41) and the inner friction plate (42) being sequentially stacked in an alternating manner.
5. The direct-connection multi-plate friction power takeoff device as claimed in claim 1, wherein a return spring (6) is arranged between the piston top plate (52) and the friction plate unit (4), one end of the return spring (6) abuts against one side of the external spline connecting part (21), and the other end of the return spring abuts against the piston top plate (52).
6. The direct-connection multi-piece friction power takeoff according to claim 1, wherein an annular limiting block (23) is connected to the side of the external spline connecting part (21) far away from the piston top plate (52).
7. The direct-connection multi-plate friction power takeoff device as claimed in claim 2, characterized in that an annular protrusion (54) extending inwards is arranged in the housing (1) at the input port, an annular shoulder (12) connected with the inner wall of the housing (1) is arranged at one end of the piston (5) close to the movable bearing (51), and a cylindrical part (55) extending into the annular protrusion (54) is arranged at one end of the piston (5) far from the movable bearing (51).
8. The direct-connection multi-plate friction power takeoff device as claimed in claim 7, wherein the pneumatic sealing structure comprises a first sealing groove arranged on the annular convex part (54), and a first pneumatic sealing ring (13) embedded in the first sealing groove, and the first pneumatic sealing ring (13) is tightly attached to the cylindrical part (55).
9. The direct-connection multi-plate friction power takeoff device as claimed in claim 7, wherein the pneumatic sealing structure further comprises a second sealing groove arranged on the annular shoulder (12), and a second pneumatic sealing ring (56) embedded in the second sealing groove, and the second pneumatic sealing ring (56) is tightly attached to the inner wall of the casing (1).
10. The direct-connected multi-plate friction power takeoff according to claim 1, characterized in that at least one output bearing (33) is provided at the output port and outside the circumference of the output shaft (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920565624.6U CN210196290U (en) | 2019-04-24 | 2019-04-24 | Direct-connection multi-piece friction power takeoff |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920565624.6U CN210196290U (en) | 2019-04-24 | 2019-04-24 | Direct-connection multi-piece friction power takeoff |
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| CN210196290U true CN210196290U (en) | 2020-03-27 |
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| CN201920565624.6U Active CN210196290U (en) | 2019-04-24 | 2019-04-24 | Direct-connection multi-piece friction power takeoff |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990008A (en) * | 2019-04-24 | 2019-07-09 | 浙江佰事瑞帕瓦传动有限公司 | A kind of direct-connected multi-disc friction power takeoff |
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2019
- 2019-04-24 CN CN201920565624.6U patent/CN210196290U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990008A (en) * | 2019-04-24 | 2019-07-09 | 浙江佰事瑞帕瓦传动有限公司 | A kind of direct-connected multi-disc friction power takeoff |
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