CN215521894U - Gearbox assembly and engineering machinery - Google Patents
Gearbox assembly and engineering machinery Download PDFInfo
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- CN215521894U CN215521894U CN202120753244.2U CN202120753244U CN215521894U CN 215521894 U CN215521894 U CN 215521894U CN 202120753244 U CN202120753244 U CN 202120753244U CN 215521894 U CN215521894 U CN 215521894U
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- power take
- shaft
- gear
- gearbox
- bearing
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Abstract
The utility model relates to a gearbox assembly, aiming at solving the problem of poor coaxiality of bearings at two ends of a power taking shaft in the existing gearbox assembly, the utility model constructs the gearbox assembly and engineering machinery, wherein the gearbox assembly comprises a gearbox, a torque converter and a variable speed pump fixedly arranged on a shell of the gearbox, the shell of the gearbox is fixedly arranged on the sleeve surface of the shell of the torque converter, a power taking gear in the torque converter is meshed with a transfer gear, two rib plates are inwards arranged on the shell of the torque converter, the power taking shaft of the power taking gear is supported and arranged on the two rib plates through a first bearing and a second bearing, the power taking gear is positioned between the two rib plates, and the end part of the power taking shaft is in splined connection with the variable speed pump. In the utility model, the power take-off shaft is respectively supported and mounted on the two rib plates through the two bearings, so that the distance between the two support bearings on the power take-off shaft is shortened, the coaxiality of the mounting positions of the two bearings is easily ensured, the service lives of the bearings and the power take-off shaft are prolonged, the meshing stability of the power take-off gear and the transfer gear is improved, and the noise is reduced.
Description
Technical Field
The utility model relates to a gearbox, in particular to a gearbox assembly and engineering machinery.
Background
The gearbox assembly of the engineering machinery such as a loader comprises a gearbox and a hydraulic torque converter, wherein shells of the gearbox and the hydraulic torque converter are fixedly connected with each other. The pump wheel of the hydraulic torque converter is in rigid transmission connection with the transfer gear, the transfer gear is meshed with the power take-off gear 7, and the power take-off shaft of the power take-off gear 7 is connected with the variable speed pump 1 arranged on the shell 2 of the variable speed case through a spline. The engine drives the cover wheel, the cover wheel drives the transfer gear to rotate, the transfer gear drives the power take-off gear to rotate, and the power take-off gear shaft drives the variable speed pump to work through the spline.
In the existing gearbox assembly, one end of the power take-off shaft 3 is rotatably mounted on a first rib plate 44 of a hydraulic torque converter shell through a first bearing 12, and the other end of the power take-off shaft is supported and mounted on a gearbox shell 2 through a second bearing 11. The gearbox shell 2 and the torque converter shell 4 are in locking assembly connection through bolts, the assembly precision of the gearbox shell 2 affects the coaxiality of the first bearing 12 and the second bearing 11, meanwhile, because the bearing span at the two ends of the power take-off shaft 3 is large and the coaxiality is poor, the service lives of the power take-off shaft 3 and the bearings are affected, and meanwhile, the meshing precision of the power take-off gear 7 and the transfer gear is affected, so that the noise is increased; the variable speed pump 1 is installed outside the shell of the transmission case, and has the risk of oil leakage.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the coaxiality of bearings at two ends of a power take-off shaft in the existing gearbox assembly is poor, and provides a gearbox assembly and engineering machinery.
The technical scheme for realizing the purpose of the utility model is as follows: a gearbox assembly is constructed and comprises a gearbox, a torque converter and a variable speed pump fixedly mounted on a gearbox shell, wherein the gearbox shell is fixedly mounted on a matching surface of the torque converter shell, a power take-off gear in the torque converter is meshed with a transfer gear, and the transmission assembly is characterized in that two rib plates are inwardly arranged on the torque converter shell, a power take-off shaft of the power take-off gear is supported and mounted on the two rib plates through a first bearing and a second bearing, the power take-off gear is located between the two rib plates, and the end part of the power take-off shaft is in splined connection with the variable speed pump. According to the torque converter, the two rib plates are arranged in the shell of the torque converter, the power take-off shaft is supported and mounted on the two rib plates through the two bearings, the distance between the two support bearings on the power take-off shaft is shortened, the coaxiality of the two bearing mounting positions is easily guaranteed when the two rib plates are used for machining the bearing mounting positions, the service lives of the bearings and the power take-off shaft are prolonged, the meshing stability of the power take-off gear and the transfer gear is improved, and noise is reduced.
In the transmission assembly, a mounting hole is formed in the transmission shell, and the variable speed pump extends into the torque converter shell through the mounting hole. The variable speed pump adopts embedded installation, stretches into torque converter casing inner chamber from the mounting hole on the gearbox casing, and variable speed pump fluid does not have the risk of leaking outward, guarantees the incasement hydraulic pressure oil level, has improved gearbox stability and reliability. Compared with an externally mounted variable speed pump arranged outside a transmission shell, the embedded variable speed pump has low noise radiated outwards.
In the gearbox assembly, the second bearing is positioned between the power take-off gear and the variable speed pump, and the power take-off shaft is provided with a limiting mechanism which is in contact with the inner ring of the first bearing and is limited towards the first end of the variable speed pump. Furthermore, the limiting mechanism is composed of a check ring installation groove arranged on the power take-off shaft and a check ring installed in the check ring installation groove, and the check ring is in contact with the first end of the inner ring of the second bearing. Or the limiting mechanism is composed of a limiting step arranged on the power take-off shaft. The limiting mechanism is contacted with the second shaft, so that the axial movement of the power take-off shaft from the variable speed pump to the power take-off gear direction can be limited.
In the gearbox assembly, a spacer sleeve is arranged between the second end of the inner ring of the second bearing and the power take-off gear, and the spacer sleeve enables a gap to be kept between the power take-off gear and the first bearing.
In the gearbox assembly, the power take-off shaft is provided with a limiting step used for limiting axial contact with the variable speed pump. The limit step is in axial contact with the speed change pump, and can limit the axial movement of the power take-off shaft from the power take-off gear to the speed change pump
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 transmission assembly. The work machine may be a loader, a grader, or the like.
Compared with the prior art, the utility model has the advantages that the coaxiality is easily ensured by shortening the distance between the two support bearings of the power take-off shaft, so that the service lives of the bearings and the power take-off shaft are prolonged, the meshing stability between the power take-off gear and the transfer gear is improved, and the noise is reduced.
Drawings
Fig. 1 is a structural diagram of an arrangement between a transmission pump and a power take-off shaft on a conventional transmission assembly.
Fig. 2 is a structural view of the arrangement between the variable speed pump and the power take-off shaft on the transmission assembly of the present invention.
FIG. 3 is a schematic end view of a transmission assembly of the present invention.
FIG. 4 is an end view of a torque converter housing in the transmission assembly of the present invention.
Part names and serial numbers in the figure:
the variable-speed pump comprises a variable-speed pump 1, a gearbox shell 2, a power take-off shaft 3, a torque converter shell 4, a sleeve fitting surface 41, a second rib plate 42, a second bearing mounting position 43, a first rib plate 44, a retainer ring 5, a spacer sleeve 6, a power take-off gear 7, a transfer gear 8, a pump wheel 9, a cover wheel 10, a second bearing 11 and a first bearing 12.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
As shown in fig. 2 to 4, the transmission assembly in the present embodiment includes a transmission, a torque converter, and a transmission pump fixedly mounted on the transmission housing 2. The transmission case 2 is fixedly arranged on a fitting surface 41 of the torque converter case 4, a power take-off gear 7 in the torque converter is meshed with a transfer gear 8, the transfer gear 8 is rigidly connected with a pump wheel 9 through a bolt, and the pump wheel 9 is rigidly connected with a cover wheel 10 through a bolt.
As shown in fig. 2 and 4, a first rib plate 44 and a second rib plate 42 are arranged in the torque converter housing 4, a first bearing mounting position is arranged on the first rib plate 44, a second bearing mounting position 43 is arranged on the second rib plate 42, a first bearing 12 and a second bearing 11 are respectively mounted on the first bearing mounting position and the second bearing mounting position 43, the first bearing 12 and the second bearing 11 are coaxially arranged, the power take-off shaft 3 is supported and mounted on the first rib plate 44 and the second rib plate 42 through the first bearing 12 and the second bearing 11, the power take-off gear 3 is positioned between the first bearing 12 and the second bearing 11, and a spacer 6 is arranged between the power take-off gear 3 and the second bearing 11.
The power take-off shaft 3 is provided with a limiting mechanism for limiting the axial direction of the second bearing shaft 11. The limiting mechanism is composed of a check ring mounting groove arranged on the power take-off shaft and a check ring 5 mounted in the check ring mounting groove, and the check ring 5 is in contact with the first end of the inner ring of the second bearing 11. The limiting mechanism can also be composed of a limiting step arranged on the power take-off shaft 3. The limit mechanism is contacted with the second bearing 11, so that the axial movement of the power take-off shaft 3 from the speed change pump 1 to the power take-off gear 7 can be limited.
As shown in fig. 2 and fig. 3, a mounting hole is formed in the transmission case 2, the transmission pump 1 extends into the torque converter case 4 through the mounting hole, and the spline at the end of the power take-off shaft 3 extends into the transmission pump 1 and is connected with the driving gear spline of the transmission pump 1. The variable speed pump 1 is installed in an embedded mode, the mounting hole in the gearbox shell 2 extends into the inner cavity of the torque converter shell 4, oil in the variable speed pump 1 does not have the risk that the oil leaks to the outside of the gearbox shell 2, it is guaranteed that hydraulic oil in the gearbox cannot be reduced due to leakage of the variable speed pump, and stability and reliability of the gearbox are improved.
The power take-off shaft 3 is provided with a limit step which is axially contacted and limited with the speed change pump. The limiting step is in axial contact with the variable speed pump 1, and can limit the axial movement of the power take-off shaft 3 from the power take-off gear to the direction of the variable speed pump.
In this embodiment, through set up twice gusset in torque converter casing, the power take-off axle supports respectively through two bearings and installs on two gussets, has shortened the distance between two last support bearings of power take-off axle to processing bearing installation position on two gussets guarantees the axiality of two bearing installation positions easily, improves the life of bearing and power take-off axle, improves power take-off gear and transfer gear meshing stability, noise reduction.
Claims (8)
1. A gearbox assembly comprises a gearbox, a torque converter and a variable speed pump fixedly mounted on a gearbox shell, wherein the gearbox shell is fixedly mounted on a sleeve surface of the torque converter shell, a power take-off gear in the torque converter is meshed with a transfer gear, and the transmission assembly is characterized in that two rib plates are inwardly arranged on the torque converter shell, a power take-off shaft of the power take-off gear is supported and mounted on the two rib plates through a first bearing and a second bearing, the power take-off gear is located between the two rib plates, and the end part of the power take-off shaft is in splined connection with the variable speed pump.
2. A transmission assembly according to claim 1, wherein the transmission housing is provided with a mounting hole through which the transmission pump extends into the torque converter housing.
3. The gearbox assembly according to claim 1 or 2, wherein the second bearing is located between the power take-off gear and the variable speed pump, and the power take-off shaft is provided with a limiting mechanism which is in contact with the first end of the inner ring of the second bearing for limiting the position.
4. A transmission assembly according to claim 3, wherein the limiting means comprises a retaining ring mounting groove provided in the power take-off shaft and a retaining ring mounted in the retaining ring mounting groove, the retaining ring being in contact with the first end of the inner race of the second bearing.
5. A transmission assembly according to claim 3, wherein said limiting means comprises a limiting step provided on said power take-off shaft.
6. A gearbox assembly according to claim 4 or 5, characterised in that a spacer sleeve is provided between the second end of the inner race of the second bearing and the power take-off gear.
7. The gearbox assembly according to claim 1 or 2, wherein the power take-off shaft is provided with a limit step for limiting axial contact with the speed change pump.
8. A working machine, characterized by a gearbox assembly according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120753244.2U CN215521894U (en) | 2021-04-14 | 2021-04-14 | Gearbox assembly and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120753244.2U CN215521894U (en) | 2021-04-14 | 2021-04-14 | Gearbox assembly and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215521894U true CN215521894U (en) | 2022-01-14 |
Family
ID=79801928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120753244.2U Active CN215521894U (en) | 2021-04-14 | 2021-04-14 | Gearbox assembly and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215521894U (en) |
-
2021
- 2021-04-14 CN CN202120753244.2U patent/CN215521894U/en active Active
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