CN215908370U - Planet row, planet gearbox and engineering machinery - Google Patents
Planet row, planet gearbox and engineering machinery Download PDFInfo
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- CN215908370U CN215908370U CN202121205685.5U CN202121205685U CN215908370U CN 215908370 U CN215908370 U CN 215908370U CN 202121205685 U CN202121205685 U CN 202121205685U CN 215908370 U CN215908370 U CN 215908370U
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Abstract
The utility model relates to a planetary speed change mechanism, aiming at solving the problems of assembly working hours and low part cost in the aspect of positioning and rotation prevention of a planetary shaft of the existing planetary gearbox, and the utility model constructs a planetary gear, a planetary gearbox and engineering machinery, wherein the planetary gear comprises a planet carrier, a planetary gear arranged on the planet carrier through the planetary shaft, a sun gear meshed with the planetary gear and a gear ring, an annular output gear and the sun gear are coaxially arranged and fixedly arranged on the right side surface of the planet carrier through bolts, the right end of each planetary shaft penetrates through the planet carrier and extends into an inner circular hole of the output gear, the right end of the planetary shaft is a flat shaft section, and the minimum distance from the wall surface of the inner circular hole of the output gear to the axis of the planetary shaft is smaller than the maximum radius of the flat shaft section of the planetary shaft. In the utility model, the planet shaft is positioned in an anti-rotation mode through the output gear, and no additional part is needed, compared with the prior art that a stop disc is used for stopping and preventing rotation, the structure is simpler, and the assembly time and the part cost are lower.
Description
Technical Field
The utility model relates to a planetary speed change mechanism, in particular to a planetary gear set, a planetary gearbox and engineering machinery.
Background
The planet row comprises planet wheels which are simultaneously meshed with the sun wheel and the gear ring, wherein the planet wheels are arranged on the planet carrier through planet shafts. In the planet row, one of the three parts of the sun gear, the gear ring and the planet carrier is fixedly locked, and the other two parts are respectively a power input end and a power output end.
In order to prevent the planet shaft from rotating when the planet row works, the planet row is provided with the stop disc, the planet shaft is provided with the anti-rotation clamping groove, the through hole of the stop disc is provided with the locking bayonet, the planet shaft is clamped by rotating the stop disc, and the stop disc is fixedly installed through the bolt so that the stop disc is fixed relative to the planet carrier, thereby achieving the effects of preventing the planet shaft from rotating and positioning.
The anti-rotation structure of the planet shaft in the existing planetary mechanism is simple in structure and easy to assemble, and is widely applied to a planetary gearbox of a loader. However, the locking disk is used for preventing the rotation of the planet shaft, so that not only a clamping groove needs to be machined on the planet shaft, but also the locking disk needs to be prepared and assembled in multiple steps, and therefore, the problems of assembly working hours and part cost are very high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that the existing planetary gearbox has low assembly working hours and low part cost in the aspect of positioning and rotation prevention of a planetary shaft, and provides a planetary gear train, a planetary gearbox and engineering machinery, so that the gearbox has a simpler structure in the aspect of positioning and rotation prevention of the planetary shaft and has low assembly working hours and part cost.
The technical scheme for realizing the purpose of the utility model is as follows: the planet row is constructed and comprises a planet carrier, planet wheels, a sun wheel, a gear ring and an output gear, wherein the planet wheels are arranged on the planet carrier through a planet shaft, the sun wheel and the gear ring are meshed with the planet wheels, the output gear is annular and is coaxially arranged with the sun wheel and fixedly arranged on the right side face of the planet carrier through bolts, the planet row is characterized in that the right end of each planet shaft penetrates through the planet carrier and extends into an inner circular hole of the output gear, the right end of the planet shaft is a flat shaft section, and the minimum distance from the wall surface of the inner circular hole of the output gear to the axis of the planet shaft is smaller than the maximum radius of the flat shaft section of the planet shaft. In the utility model, the planet shaft is positioned in an anti-rotation mode through the output gear, no additional part is needed, and only a flat position needs to be processed on the planet shaft, so that compared with the prior art in which a stop disk is used for stopping and preventing rotation, the structure is simpler, and the assembly time and the part cost are lower.
In the planet row, a hole in the planet carrier for accommodating the left end of the planet shaft is a stepped hole, and the left end of the planet shaft is positioned at a large-aperture section of the stepped hole; and the axial side surface on the left side of the flat shaft section is in contact connection with the axial side surface of the output gear, and the output gear is utilized to axially position the planet shaft.
In the planetary row, the flat position on the flat shaft section is a plane, or the flat position on the flat shaft section is an arc surface, the arc radius of the arc surface is equal to the radius of the inner circular hole of the output gear, and the flat position is in clearance fit with the wall surface of the inner circular hole of the output gear.
The technical scheme for realizing the purpose of the utility model is as follows: constructing a planetary gearbox which is provided with the planetary row, further comprising a clutch and a connecting disc, wherein a clutch oil cylinder body of the clutch is fixedly arranged on the right side of the output gear through a bolt; the connecting disc is positioned in the inner cavity of the cylinder body of the clutch cylinder and is fixedly connected with the sun wheel; the friction plate and the dual steel sheet in the friction pair of the clutch are respectively connected with the connecting disc and the cylinder body of the oil cylinder, and the left side and the right side of the friction pair are respectively opposite to the clutch piston and the output gear.
In the planetary transmission, the right end of the sun gear extends to the right side of the planet carrier, the sun gear is provided with a disc-shaped protrusion surrounding the center of the sun gear on the section on the right side of the planet carrier, and the connecting disc is fixed on the disc-shaped protrusion through a bolt.
The technical scheme for realizing the purpose of the utility model is as follows: a construction machine is constructed, which is characterized by comprising the planetary gearbox.
Compared with the prior art, the anti-rotation positioning device has the advantages that the planet shaft is positioned in an anti-rotation mode through the output gear, extra parts are not needed, and only the flat position needs to be processed on the planet shaft, so that compared with the prior art that the stop disc is used for stopping and preventing rotation, the structure is simpler, and the assembly working hour and the part cost are lower.
Drawings
Fig. 1 is a schematic view of a connection structure of a planetary row and a direct gear transmission mechanism in a planetary transmission of the utility model.
Fig. 2 is a schematic structural view of a planetary shaft in the planetary transmission of the present invention.
Fig. 3 is a schematic structural view of an output gear in the planetary transmission of the present invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
The planetary transmission in this embodiment is configured as shown in fig. 1, and includes a planetary row, direct-drive transmission mechanism disposed within a casing (not shown).
The planet row comprises a sun gear 12, a planet carrier 10, planet wheels 14, a planet shaft 13, a gear ring (not shown in the figure) and an output gear 20, wherein the planet wheels 14 are mounted on the planet shaft 13 through needle rollers 15, two ends of the planet shaft 13 are positioned in holes on the planet carrier 10, and the planet wheels 14 are simultaneously meshed with the sun gear 12 and the gear ring. A brake is arranged between the ring gear and the casing (not shown) of the gearbox, and the brake can lock the ring gear.
As shown in fig. 1, an output gear 20 is fixedly mounted on the right side of the carrier 10 by bolts, and the output gear 20 is engaged with an output shaft gear (not shown) on an output shaft in the transmission, so that power is output from the output shaft.
As shown in fig. 1, the direct drive transmission includes a clutch and a land 32, the land 32 being located on the right side of the planet row and being fixedly connected to the sun gear 12 of the planet row. The right end of the sun gear 12 passes through the planet carrier and extends to the right side of the planet carrier 10, the section of the sun gear 12 protruding out of the planet carrier 10 is provided with an annular protrusion 121, and the connecting disc 32 is fixed on the annular protrusion 121 through bolts.
The direct gear transmission mechanism is arranged on the right side of the planetary row, a clutch cylinder body 30 of the direct gear transmission mechanism is positioned on the right side of the output gear 20 and is fixedly connected with the output gear 20 through bolts, and a friction plate and a dual steel sheet in a clutch friction pair 33 are respectively connected with a connecting disc 32 and the clutch cylinder body 30. A cylindrical pin 34 is provided between the clutch cylinder block 30 and the output gear 20, and the clutch friction pair 33 is connected to the clutch cylinder block 30 via the cylindrical pin 34.
The clutch piston 31 of the clutch oil cylinder is located on the right side of the clutch friction pair 33 and arranged in the clutch oil cylinder body, the clutch oil cylinder body is provided with an oil cylinder oil duct 37, a first end of the oil cylinder oil duct 67 is communicated with an oil cavity used for pushing the clutch piston, and a second end of the oil cylinder oil duct 67 is arranged in the middle of the right side face of the clutch oil cylinder body 30 and is communicated with a clutch control oil port arranged on a gearbox cover. After entering from a clutch control oil port on a box cover, oil for controlling the clutch enters from a second end of an oil cylinder oil passage 37 and enters into an oil cavity of a clutch oil cylinder to push a clutch piston 31 to move leftwards, a clutch friction pair 33 moves towards an output gear under the pushing of the clutch piston and is finally pressed between the output gear 20 and the clutch piston 31, and a connecting disc 32 is rigidly connected with the output gear 20 through the pressed clutch friction pair and rotates together.
The right end of the sun gear 12 is rotatably connected to the left middle portion of the clutch cylinder block 30 through a fourth bearing 35. The clutch cylinder block 30 is rotatably connected to the case cover at the right middle portion thereof via a second bearing 36. The left end of the sun gear 12 is provided with a third bearing mounting position 122, and a third bearing is mounted at the third bearing mounting position 122, so that the left end of the sun gear 12 is rotatably connected with the planet carrier 10. The left end of the planet carrier 10 is provided with a first bearing position 102, and a first bearing is installed on the first bearing position 102, so that the planet carrier 10 is rotatably connected with the box body.
In the transmission of the embodiment, the brake is off, and the sun gear 12 drives the gear ring to idle through the planet gear 14; the clutch is engaged, and the sun gear 12 is driven by the connecting disc 32, the clutch, the output gear 20, the output shaft gear and the output shaft to realize direct gear power output. When the brake is engaged, the clutch is disconnected, the gear ring of the planetary row is fixed and does not rotate relative to the box body, the sun gear 12 drives the planet carrier 10 to rotate through the planet gears 14, the output gear 20 is rigidly and fixedly connected with the planet carrier 10 to rotate together, and first-gear power output is realized through the output gear 20, the output shaft gear and the output shaft.
The planetary gearbox described above may be used in an electric working machine, for example in a motor loader, a grader or the like. The output shaft of the motor is connected with the sun gear of the planetary gearbox through a spline to realize the power input of the planetary gearbox, and the output shaft of the planetary gearbox is connected with the traveling transmission shaft of the engineering machinery.
In the planetary row, two ends of the planetary shaft 13 are installed in holes on the left and right sides of the planet carrier 10, wherein the hole on the left side is a stepped hole 101, and the left end of the planetary shaft 13 is located at a large-aperture section of the stepped hole 101. The right end of the planet shaft 13 passes through the through hole on the right side of the planet carrier 10, protrudes to the right side of the planet carrier 10, and protrudes into the inner circular hole of the output gear 20.
As shown in fig. 2, the right end of the planetary shaft 13 extending into the inner circular hole of the output gear 20 is a flat shaft section 131 having a flat portion 132 formed by milling. On the flat shaft section 131, the minimum distance from the axis of the planetary shaft 13 to the inner circular hole wall surface 21 of the output gear 20 is smaller than the maximum radius of the flat shaft section 131, and when the planetary shaft 13 rotates around the axis, the flat shaft section 131 interferes with the inner circular hole wall surface 21 of the output gear 20, so that the rotation prevention of the planetary shaft 13 is realized. The flat shaft section 131 of the planet shaft 13 is provided with a step at the left side of the flat position due to the processing of the flat position 132, and the axial side surface 133 at the step is in contact with the axial side surface of the output gear 20, so that the axial positioning of the planet shaft 13 is realized. The flat part 132 disposed on the flat shaft section 131 may be a plane or an arc surface, the radius of the arc surface is equal to the radius of the inner circular hole of the output gear 20, and the flat part 131 is in clearance fit with the inner circular hole wall surface 21 of the output gear 20.
In the planetary row of the present embodiment, the rotation prevention and axial positioning of the planetary shaft 13 are achieved by the output gear 20 fixed to the carrier 10, and compared with the prior art in which a snap ring is used, there is no snap ring, and no new parts are added, thereby saving the cost of parts and the time for assembling the snap ring.
The planetary gearbox is a two-gear gearbox in the present embodiment, wherein the planetary gear set can also be applied to other multi-gear planetary gearboxes. One of the sun gear, the output gear and the ring gear of the planetary gear set is fixed or can be locked by a brake, and the other two parts are respectively a power input part and a power output part of the planetary gear set (the output gear can also be used as the power input part), so that the aim of planetary speed change is fulfilled.
Claims (8)
1. A planet row comprises a planet carrier, planet wheels arranged on the planet carrier through a planet shaft, a sun wheel, a gear ring and an output gear, wherein the sun wheel and the gear ring are meshed with the planet wheels, the output gear is annular and is coaxially arranged with the sun wheel and fixedly arranged on the right side face of the planet carrier through bolts, the planet row is characterized in that the right end of each planet shaft penetrates through the planet carrier and extends into an inner circular hole of the output gear, the right end of the planet shaft is a flat shaft section, and the minimum distance from the wall surface of the inner circular hole of the output gear to the axis of the planet shaft is smaller than the maximum radius of the flat shaft section of the planet shaft.
2. The planetary gearset according to claim 1, characterised in that the aperture in the planet carrier receiving the left end of the planet shaft is a stepped aperture, the left end of the planet shaft being located in the large aperture section of the stepped aperture; the axial side surface on the left side of the flat shaft section is in contact connection with the axial side surface of the output gear.
3. An epicyclic gearbox according to claim 1 or 2, wherein said flat on said flat shaft section is a flat surface.
4. A planet row according to claim 1 or 2, wherein the flat point on the flat shaft section is a circular arc surface with a radius equal to the radius of the inner circular hole of the output gear.
5. A planetary gearbox characterised by a planetary row as claimed in any one of claims 1 to 4.
6. The planetary gearbox of claim 5, wherein the planetary gearbox further comprises a clutch and a connecting disc, and a clutch cylinder body of the clutch is fixedly mounted on the right side of the output gear through a bolt; the connecting disc is positioned in the inner cavity of the cylinder body of the clutch cylinder and is fixedly connected with the sun wheel; the friction plate and the dual steel sheet in the friction pair of the clutch are respectively connected with the connecting disc and the cylinder body of the oil cylinder, and the left side and the right side of the friction pair are respectively opposite to the clutch piston and the output gear.
7. The planetary transmission according to claim 5, wherein the sun gear extends to the right of the carrier at its right end, and is provided with a disk-shaped protrusion around its center at a section located on the right of the carrier, and the connection plate is fixed to the disk-shaped protrusion by a bolt.
8. A working machine, characterized by comprising a planetary gearbox according to any of claims 5-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121205685.5U CN215908370U (en) | 2021-06-01 | 2021-06-01 | Planet row, planet gearbox and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121205685.5U CN215908370U (en) | 2021-06-01 | 2021-06-01 | Planet row, planet gearbox and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215908370U true CN215908370U (en) | 2022-02-25 |
Family
ID=80287385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121205685.5U Active CN215908370U (en) | 2021-06-01 | 2021-06-01 | Planet row, planet gearbox and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215908370U (en) |
-
2021
- 2021-06-01 CN CN202121205685.5U patent/CN215908370U/en active Active
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