CN216642985U - High-strength powder metallurgy shaft lock mechanism - Google Patents
High-strength powder metallurgy shaft lock mechanism Download PDFInfo
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- CN216642985U CN216642985U CN202123378819.6U CN202123378819U CN216642985U CN 216642985 U CN216642985 U CN 216642985U CN 202123378819 U CN202123378819 U CN 202123378819U CN 216642985 U CN216642985 U CN 216642985U
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Abstract
The utility model relates to the technical field of powder metallurgy shaft locks, in particular to a high-strength powder metallurgy shaft lock mechanism which is provided with a shaft lock shell, shaft lock roller pins, a shaft lock planet carrier and a shaft lock cam and is characterized in that the shaft lock planet carrier comprises a flange plate and pins, a first output shaft matching hole is arranged in the middle of the flange plate, three pins are uniformly distributed on the flange plate, the pins respectively penetrate through the upper side and the lower side of the flange plate, the pins are divided into an upper toggle claw and a lower driving claw by the flange plate, a shaft lock cam is arranged above the flange plate, arc-shaped grooves corresponding to the upper toggle claw are arranged on the outer edge of the shaft lock cam, a limiting lug is arranged on the outer edge of the shaft lock cam between adjacent arc-shaped grooves, an inclined locking surface is arranged on the outer edge of the shaft lock cam between the limiting lug and the arc-shaped grooves, a shaft lock roller pin is arranged in a gap between the limiting lug and the upper toggle claw, a second output shaft matching hole is arranged in the middle of the shaft lock cam, the shaft lock has the advantages of simple structure, high impact resistance, no fracture, high reliability of the shaft lock function and the like.
Description
Technical Field
The utility model relates to the technical field of powder metallurgy shaft locks, in particular to a high-strength powder metallurgy shaft lock mechanism which has a simple structure, can bear large impact force, does not break and has high reliability of shaft lock function.
Background
As is known, a gearbox lubricating oil pump is a conventional component in a gearbox, and when the oil pump works, an impeller is driven by a motor to rotate, and lubricating oil is sprayed onto the surface of a transmission gear. The rotating speed of the oil pump changes along with the rotating speed change of the output shaft of the gearbox, and the oil pumping amount is controlled to be a reasonable value under the condition that the lubrication state of the transmission gear is ensured to be good. When the rotating speed of the output shaft is reduced, a locking device is designed at the output end of the oil pump for preventing the oil pump impeller from pumping oil due to inertia (note: when the output shaft of the gearbox rotates at a constant speed, the oil pump motor drives the impeller to rotate, but conversely, when the output shaft of the gearbox decelerates, the main shaft of the oil pump impeller cannot drive the motor to rotate due to the shaft locking mechanism), so that the oil pumping amount is reduced.
At present, the oil pump shaft lock function is mainly realized by four parts, namely a shaft lock planet carrier, a shaft lock cam, a shaft lock chamber and a shaft lock roller pin, a motor drives a gear box to rotate, three small claws of the shaft lock planet carrier stir three of the six roller pins no matter in positive rotation or reverse rotation, the roller pins drive the shaft lock cam, and therefore force is transmitted to an output shaft, and the output shaft drives an oil pump impeller to rotate. When the output shaft is rotated, the output shaft drives the shaft lock cam, the cam structure of the shaft lock cam extrudes three shaft lock roller needles outwards, the shaft lock roller needles are limited by the shaft lock chamber, the mechanism is clamped, and the locking function is realized. When the self-locking force is large or the output shaft of the gearbox is stopped suddenly (suddenly clamped in the rotating process), the instantaneous force applied to the three small claws of the planet carrier is large, and the three small claws are easy to crack, so that the self-locking function or the function of the oil pump is lost.
Disclosure of Invention
The utility model aims to solve the defects of the prior art and provide a high-strength powder metallurgy shaft lock mechanism which has the advantages of simple structure, high impact resistance, no fracture and high reliability of shaft lock function.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a high-strength powder metallurgy shaft locking mechanism is provided with a shaft locking shell, a shaft locking roller pin, a shaft locking planet carrier and a shaft locking cam, wherein the shaft locking roller pin, the shaft locking planet carrier and the shaft locking cam are arranged in the shaft locking shell after being integrally installed, and is characterized in that the shaft locking planet carrier comprises a flange plate and a pin, a first output shaft matching hole is formed in the middle of the flange plate, three pins are uniformly distributed on the flange plate and respectively penetrate through the upper side and the lower side of the flange plate, the pin is divided into an upper shifting claw and a lower driving claw by the flange plate, the shaft locking cam is arranged above the flange plate, arc grooves corresponding to the upper shifting claw are arranged on the outer edge of the shaft locking cam, a limiting convex block is arranged on the outer edge of the shaft locking cam between adjacent arc grooves, the outer edge of the shaft locking cam between the limiting convex block and the arc grooves is set as an inclined locking surface, and the shaft locking roller pin is arranged in a gap between the limiting convex block and the upper shifting claw, and a second output shaft matching hole is formed in the middle of the shaft lock cam, the second output shaft matching hole is in tight fit with the output shaft, and the first output shaft matching hole is in clearance fit with the output shaft.
The diameter of the pin is larger than that of the shaft lock roller pin, the diameter of the pin is 4-5mm, and the diameter of the shaft lock roller pin is 3 mm.
The groove depth of the arc-shaped groove is smaller than the radius of the pin, so that the side surface of the pin can protrude out of the side surface of the arc-shaped groove, and the aim of poking the shaft lock roller pin is fulfilled.
By adopting the structure, the utility model has the advantages of simple structure, high impact resistance, no fracture, high reliability of shaft lock function and the like.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the shaft lock planetary carrier of fig. 1.
Fig. 3 is a sectional view a-a in fig. 2.
Fig. 4 is a schematic diagram showing the clockwise rotation of the output shaft in the non-shaft-lock state.
Fig. 5 is a structural schematic diagram of clockwise rotation of the output shaft in the shaft lock state.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
as shown in the attached figure 1, the high-strength powder metallurgy shaft locking mechanism is provided with a shaft locking shell 1, a shaft locking needle roller 2, a shaft locking planet carrier and a shaft locking cam 3, wherein the shaft locking needle roller 2, the shaft locking planet carrier and the shaft locking cam 3 are arranged in the shaft locking shell 1 after being integrally installed, and is characterized in that the shaft locking planet carrier comprises a flange plate 4 and pins, a first output shaft matching hole 5 is arranged in the middle of the flange plate 4, three pins are uniformly distributed on the flange plate 4 and respectively penetrate through the upper side and the lower side of the flange plate 4, the pins are divided into an upper shifting claw 6 and a lower driving claw 7 by the flange plate 4, the shaft locking cam 3 is arranged above the flange plate 4, an arc-shaped groove 8 corresponding to the upper shifting claw 6 is arranged on the outer edge of the shaft locking cam 3, a limiting lug 9 is arranged on the outer edge of the shaft locking cam 3 between adjacent arc-shaped grooves 8, an outer edge of the shaft locking cam 3 between the limiting lug 9 and the arc-shaped groove 8 is set as an inclined locking surface 10, a shaft lock roller pin 2 is arranged in a gap between the limiting convex block 9 and the upper toggle claw 6, a second output shaft matching hole 11 is arranged in the middle of the shaft lock cam 3, the second output shaft matching hole 11 is in tight fit with the output shaft, and the first output shaft matching hole 5 is in clearance fit with the output shaft.
Further, the diameter of the pin is larger than that of the shaft lock roller pin 2, the diameter of the pin is 4-5mm, and the diameter of the shaft lock roller pin 2 is 3 mm.
Furthermore, the groove depth of the arc-shaped groove 8 is smaller than the radius of the pin, so that the side surface of the pin can protrude out of the side surface of the arc-shaped groove 8, and the purpose of shifting the shaft lock needle roller 2 is realized.
As shown in fig. 2 and 3, the pin passes through the flange plate 4, the flange plate 4 divides the pin into an upper toggle claw 6 and a lower toggle claw 7, the lower toggle claw 7 is provided with a novel gear, the upper toggle claw 6 realizes an axle locking function, and the pin itself realizes two functions, so that the performance of the planet carrier axle locking structure is greatly improved, and the upper toggle claw 6 and the lower toggle claw 7 are integrated, so that the pin can bear large impact, the pin is not broken, and the reliability of the axle locking function is improved, as shown in fig. 4 and 5, in a non-axle locking state, when an output shaft rotates clockwise, the lower toggle claw 7 of the pin on the axle locking planet carrier is driven by a planetary gear, the lower toggle claw 7 drives the flange plate 4 and the upper toggle claw 6 to rotate, because the first output shaft mating hole 5 and the second output shaft mating hole 11 respectively pass through the output shaft, and the gap of the first output shaft mating hole 5 is larger than the inner diameter of the output shaft, therefore, the flange plate 4 rotates better than the shaft lock cam 3, the upper shifting claw 6 drives the shaft lock needle roller 2 to rotate, at this time, the gap between the shaft lock needle roller 2 and the shaft lock cam 3 as well as the inner wall of the shaft lock housing 1 is a first gap 12, the first gap 12 is 0.1-0.2mm, when the shaft lock state is reached, the output shaft rotates clockwise, at this time, the flange plate 4 stops rotating instantaneously, and the shaft lock cam 3 rotates continuously under the action of inertia, at this time, the shaft lock needle roller 2 is clamped between the upper shifting claw 6 and the inner wall of the shaft lock housing 1, the first gap 12 is 0, the gap between the upper shifting claw 6 and the shaft lock needle roller 2 is a second gap 13, and the second gap 13 is 0.5-0.7 mm.
When the utility model is used, the motor drives the shaft lock planet carrier to rotate, and no matter the planet carrier rotates forwards or reversely, the three pins of the shaft lock planet carrier stir the three shaft lock roller pins 2 to rotate, thereby preventing the shaft lock roller pins 2, the shaft lock cam 3 and the shaft lock chamber from realizing the self-locking function, the output shaft matching hole on the shaft lock planet carrier flange 4 drives the output shaft to rotate and transmit torque, the flange 4 can transmit torque, so that large torque can be transmitted, and when the output shaft is rotated clockwise, the output shaft drives the shaft lock cam 3 to rotate, the shaft lock planet carrier pin cannot drive the shaft lock roller pins 2 to rotate in time, so that the shaft lock cam 3 extrudes the three shaft lock roller pins 2 outwards, the shaft lock roller pins 2 are limited by the shaft lock chamber, and the mechanism is locked to realize the locking function.
Claims (3)
1. A high-strength powder metallurgy shaft locking mechanism is provided with a shaft locking shell, a shaft locking roller pin, a shaft locking planet carrier and a shaft locking cam, wherein the shaft locking roller pin, the shaft locking planet carrier and the shaft locking cam are arranged in the shaft locking shell after being integrally installed, and is characterized in that the shaft locking planet carrier comprises a flange plate and a pin, a first output shaft matching hole is formed in the middle of the flange plate, three pins are uniformly distributed on the flange plate and respectively penetrate through the upper side and the lower side of the flange plate, the pin is divided into an upper shifting claw and a lower driving claw by the flange plate, the shaft locking cam is arranged above the flange plate, arc grooves corresponding to the upper shifting claw are arranged on the outer edge of the shaft locking cam, a limiting convex block is arranged on the outer edge of the shaft locking cam between adjacent arc grooves, the outer edge of the shaft locking cam between the limiting convex block and the arc grooves is set as an inclined locking surface, and the shaft locking roller pin is arranged in a gap between the limiting convex block and the upper shifting claw, and a second output shaft matching hole is formed in the middle of the shaft lock cam, the second output shaft matching hole is in tight fit with the output shaft, and the first output shaft matching hole is in clearance fit with the output shaft.
2. The high strength powder metallurgy shaft lock mechanism according to claim 1, wherein the diameter of the pin is larger than the diameter of the shaft lock roller pin, the diameter of the pin is 4-5mm, and the diameter of the shaft lock roller pin is 3 mm.
3. The high strength powder metallurgy shaft lock mechanism according to claim 1, wherein the depth of the arc-shaped groove is smaller than the radius of the pin, so that the side surface of the pin can protrude out of the side surface of the arc-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123378819.6U CN216642985U (en) | 2021-12-30 | 2021-12-30 | High-strength powder metallurgy shaft lock mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123378819.6U CN216642985U (en) | 2021-12-30 | 2021-12-30 | High-strength powder metallurgy shaft lock mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216642985U true CN216642985U (en) | 2022-05-31 |
Family
ID=81746168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123378819.6U Active CN216642985U (en) | 2021-12-30 | 2021-12-30 | High-strength powder metallurgy shaft lock mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216642985U (en) |
-
2021
- 2021-12-30 CN CN202123378819.6U patent/CN216642985U/en active Active
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