CN215970951U - Axle box integral type transaxle - Google Patents
Axle box integral type transaxle Download PDFInfo
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- CN215970951U CN215970951U CN202121527222.0U CN202121527222U CN215970951U CN 215970951 U CN215970951 U CN 215970951U CN 202121527222 U CN202121527222 U CN 202121527222U CN 215970951 U CN215970951 U CN 215970951U
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Abstract
The utility model discloses a bridge and box integrated drive axle.A planetary reducer is arranged in an axle body and comprises a transmission gear set, a primary planetary assembly and a gear ring; the half shaft penetrates through the middle of a first-stage sun gear, a first-stage planet carrier and a gear ring of the first-stage planet assembly respectively; when the planetary gear set works, the driving motor drives the primary sun gear in an engaged manner through the transmission gear set, the primary sun gear drives the primary planetary gear in an engaged manner, and the primary planetary gear drives the primary planetary gear frame to rotate; the first-stage planet carrier directly or indirectly drives the half shaft to rotate through the differential mechanism, so that the effects of reducing the speed and increasing the torque are achieved; the utility model adopts the planetary reducer, utilizes the circumferential external space of the half shaft, and can adopt smaller gears compared with the traditional multistage gear transmission scheme adopting a large gear ratio, thereby reducing the width in the radial direction and reducing the size of the integral drive axle of the whole axle box.
Description
Technical Field
The utility model relates to the technical field of forklifts, in particular to an axle and box integrated drive axle.
Background
The Driving Axle (Driving Axle) is an important part for transmission and bearing of the forklift, along with the rise of the electric forklift, the Driving Axle is slowly developed into an Axle box integrated structure integrating a motor, a speed reducer and the Driving Axle into a whole from a single structure, the volume of the integrated Axle box integrated Axle Driving Axle is greatly reduced compared with that of the traditional structure, more space arrangement batteries are provided for the electric forklift, and the endurance mileage of the electric forklift is increased.
Fork truck needs great moment of torsion, therefore the drive ratio is great usually, and the integrative bridge speed reduction part of traditional axle case adopts two-stage or tertiary external toothing cylindrical gear drive mechanism, and great drive ratio is assigned relatively to each grade, and this gear wheel that just makes each grade has great diameter to the diameter of envelope casing and the distance of transaxle center to motor center have been increased, whole space utilization is low. And the larger transmission ratio of each stage causes larger external force to be generated during transmission, so that the service life of a bearing and a gear is reduced.
For those skilled in the art, how to reduce the radial width of the axle box integrated drive axle is a technical problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bridge and box integrated drive axle, which fully utilizes the circumferential space of half shafts through a planetary reducer and reduces the overall radial size, and the specific scheme is as follows:
a bridge and box integrated drive axle comprises an axle body, a half shaft and a drive motor, wherein a planetary reducer is mounted on the axle body and comprises a transmission gear set, a primary planetary assembly and a gear ring;
the primary planet assembly comprises a primary sun gear, a primary planet gear and a primary planet carrier; the half shaft penetrates through the middles of the primary sun gear, the primary planet carrier and the gear ring respectively, the primary planet gears are arranged on the periphery of the half shaft in a surrounding mode, and the periphery of the primary planet gears is meshed with the gear ring;
the driving motor drives the primary sun gear through the meshing of the transmission gear set, the primary sun gear drives the primary planet gear in a meshing manner, and the primary planet gear drives the primary planet carrier to rotate; the first-stage planet carrier directly or indirectly drives the half shaft to rotate through the differential mechanism.
Optionally, the planetary reducer further comprises a secondary planetary assembly, wherein the secondary planetary assembly comprises a secondary sun gear, a secondary planet gear and a secondary planet carrier;
the half shaft penetrates through the middles of the secondary sun gear and the secondary planet carrier respectively, the secondary planet gears are arranged on the periphery of the half shaft in a surrounding mode, and the periphery of the secondary planet gears is meshed with the gear ring;
the one-level planet carrier with the peripheral relatively fixed of second grade sun gear, the one-level planet carrier drives the synchronous rotation of second grade sun gear, the meshing drive of second grade sun gear the second grade planet wheel, the second grade planet wheel drives the second grade planet carrier rotates, the second grade planet carrier passes through differential mechanism drives the semi-axis rotates.
Optionally, the primary planet carrier and the secondary sun gear are circumferentially fixed through spline fitting;
the secondary sun gear is provided with a step surface, one side surface of the primary planet carrier is propped against the step surface, and the other side surface of the primary planet carrier is axially limited through a retainer ring.
Optionally, a connecting flange is arranged on the outer side wall of the gear ring, and the connecting flange is clamped and fixed between the bridge body and the shell of the planetary reducer.
Optionally, the drive gear set comprises an input gear, an intermediate gear and an output gear, and the half shaft axially penetrates through the output gear;
the input gear is directly driven by an output shaft of the driving motor, the input gear is meshed with and drives the intermediate gear, the intermediate gear is meshed with and drives the output gear, and the output gear synchronously drives the primary sun gear to rotate.
Optionally, an electromagnetic brake is mounted on the planetary reducer and used for parking and braking the transmission gear set.
Alternatively, the intermediate gear is provided as a single gear, and the electromagnetic brake and the drive motor are located between two wheel brakes in the axial direction.
Optionally, the circumference equipartition of primary planet wheel sets up threely, the circumference equipartition of secondary planet wheel sets up five.
Optionally, a support plate is fixedly arranged outside the bridge body, and the bridge body is connected to the vehicle body through the support plate.
The utility model provides a bridge and box integrated drive axle.A planetary reducer is arranged in an axle body and comprises a transmission gear set, a primary planetary assembly and a gear ring; the half shaft penetrates through the middle of a first-stage sun gear, a first-stage planet carrier and a gear ring of the first-stage planet assembly respectively; when the planetary gear set works, the driving motor drives the primary sun gear in an engaged manner through the transmission gear set, the primary sun gear drives the primary planetary gear in an engaged manner, and the primary planetary gear drives the primary planetary gear frame to rotate; the first-stage planet carrier directly or indirectly drives the half shaft to rotate through the differential mechanism, so that the effects of reducing the speed and increasing the torque are achieved; the utility model adopts the planetary reducer, utilizes the circumferential external space of the half shaft, and can adopt smaller gears compared with the traditional multistage gear transmission scheme adopting a large gear ratio, thereby reducing the width in the radial direction and reducing the size of the integral drive axle of the whole axle box.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an isometric view of the overall construction of an axle and box integrated transaxle provided by the present invention;
FIG. 2 is a cross-sectional view of the overall structure of the integrated axle box drive axle provided by the present invention;
FIG. 3 is a sectional view showing a partial structure of a planetary reducer according to the present invention;
FIG. 4 is an axial schematic view of the primary planetary assembly, the secondary planetary assembly, and the differential in cooperation with one another;
fig. 5 is a schematic diagram of the reduction gear of the planetary reducer.
The figure includes:
the driving device comprises a bridge body 1, a supporting plate 11, a half shaft 2, a driving motor 3, a planetary speed reducer 4, a transmission gear set 41, an input gear 411, an intermediate gear 412, an output gear 413, a primary planetary assembly 42, a primary sun gear 421, a primary planetary gear 422, a primary planet carrier 423, a ring gear 43, a connecting flange 431, a secondary planetary assembly 44, a secondary sun gear 441, a secondary planetary gear 442, a secondary planet carrier 443, a retainer ring 444, a differential 5, an electromagnetic brake 6 and a wheel brake 7.
Detailed Description
The core of the utility model is to provide a bridge and box integrated drive axle, which fully utilizes the circumferential space of half shafts through a planetary reducer and reduces the overall radial size of the drive axle.
In order to make those skilled in the art better understand the technical solution of the present invention, the axle and box integrated drive axle of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is an isometric view showing the overall structure of an axle and box integrated drive axle provided by the present invention, and fig. 2 is a sectional view showing the overall structure of an axle and box integrated drive axle provided by the present invention; the axle box integrated drive axle comprises an axle body 1, a half axle 2, a drive motor 3 and the like, wherein the axle body 1 is of a shell structure, a long cavity is formed inside the axle body 1, and the corresponding structure can be accommodated in the cavity; the bridge body 1 adopts a split structure and is formed by splicing two or more segments so as to be convenient for assembly. The half shaft 2 is provided with two or more sections and respectively drives different wheels to rotate, and the structure shown in the attached drawing is provided with two half shafts 2 which drive the two wheels to rotate. During assembly, the driving motor 3 is fixed on the side wall of the axle body 1, an output shaft of the driving motor 3 is generally parallel to the half axle 2, but the power transmission direction can be changed through a universal joint, a bevel gear and other transmission structures, that is, an included angle can be formed between the output shaft of the driving motor 3 and the half axle 2.
Install planetary reducer 4 on the pontic 1, planetary reducer 4's shell is fixed for the pontic 1, and planetary reducer 4's shell and pontic 1's inner space are linked together, and the structure of planetary reducer 4 inside and the structure of pontic 1 inside work of mutually supporting.
As shown in fig. 3, which is a partial structural sectional view of the planetary reducer 4 of the present invention, the planetary reducer 4 includes a transmission gear set 41, a primary planetary assembly 42, and a ring gear 43; the transmission gear set 41 is used for transmitting the rotational power output by the drive motor 3.
The primary planet assembly 42 comprises a primary sun gear 421, primary planet gears 422 and a primary planet carrier 423, wherein the plurality of primary planet gears 422 are rotatably mounted on the primary planet carrier 423, and the primary planet gears 422 can rotate relative to the primary planet carrier 423; the gear ring 43 is fixed relative to the bridge 1, the gear ring 43 is cylindrical, meshing teeth are arranged in the gear ring 43, the primary planet wheels 422 can be meshed with teeth on the inner wall of the gear ring 43, and when the plurality of primary planet wheels 422 revolve, the primary planet carrier 423 is driven to rotate.
A through hole is arranged in the center of the first-stage sun gear 421 in a penetrating mode, a through hole is arranged in the center of the first-stage planet carrier 423 in a penetrating mode, the half shaft 2 penetrates through the middles of the first-stage sun gear 421, the first-stage planet carrier 423 and the gear ring 43 respectively, and the half shaft 2 can rotate relative to the first-stage sun gear 421, the first-stage planet carrier 423 and the gear ring 43.
The primary planet wheels 422 are arranged around the half shaft 2, the teeth on the outer surface of the primary sun wheel 421 are meshed with the primary planet wheels 422, and the primary planet wheels 422 are uniformly arranged around the primary sun wheel 421 in the circumferential direction; the outer periphery of the plurality of primary planet wheels 422 is meshed with the teeth on the inner wall of the ring gear 43.
In operation, the rotation that driving motor 3 exported transmits for transmission gear group 41, do circumferential direction through transmission gear group 41 meshing drive one-level sun gear 421, one-level sun gear 421 meshing drive one-level planet wheel 422, because one-level planet wheel 422 and fixed setting's ring gear 43 intermeshing, therefore one-level planet wheel 422 is when self rotation, still can revolute around one-level sun gear 421, drive one-level planet carrier 423 rotation when one-level planet wheel 422 revolves, the revolution of one-level planet wheel 422 keeps in step with the rotation of one-level planet carrier 423. The first-stage planet carrier 423 directly or indirectly drives the half shaft 2 to rotate through the differential mechanism 5, the differential mechanism 5 can enable two or more half shafts to rotate at different rotating speeds, and when a vehicle turns or runs on an uneven road surface, left and right wheels roll at different rotating speeds, namely, the wheels are driven to do pure rolling motion at two sides. The rotation of the primary planet carrier 423 is transmitted directly or indirectly to the input of a differential 5, which differential 5 outputs different rotational speeds to drive the two half-shafts 2.
The axle box integrated drive axle is mainly applied to an electric forklift, and the rotation output by the drive motor 3 is decelerated by the planetary reducer 4 to increase the torque; the traditional structure for realizing speed reduction through peripheral meshing of multi-stage gears arranges the multi-stage gears on one side of a half shaft, so that the radial dimension is overlarge; this application is owing to adopted planetary gear to decelerate, and the gear diameter that uses is littleer to half axle 2 runs through one-level planet assembly 42, and one-level sun gear 421, one-level planet wheel 422, one-level planet carrier 423 all distribute in half axle 2's circumference uniformly, have consequently reduced the axial radial dimension of perpendicular to greatly, reduce the radial width of axle case integral type transaxle perpendicular to axis direction.
On the basis of the above solution, the planetary reducer 4 of the present invention further includes a secondary planetary assembly 44, and as shown in fig. 3, the secondary planetary assembly 44 includes a secondary sun gear 441, a secondary planet gear 442, and a secondary planet carrier 443; the half shaft 2 passes through the middle of the secondary sun gear 441 and the secondary planet carrier 443 respectively, a plurality of secondary planet gears 442 are arranged around the outer periphery of the half shaft 2, and the outer periphery of the secondary planet gears 442 is meshed with the gear ring 43.
The primary planet gears 422 in the primary planetary assembly 42 and the secondary planet gears 442 in the secondary planetary assembly 44 share the same ring gear 43.
Referring to FIG. 4, a schematic axial view of the primary planetary assembly 42, the secondary planetary assembly 44 and the differential 5 cooperating with each other is shown; in the figure, the primary planetary assembly 42 does not show the primary sun gear 421, and the primary planetary assembly 42 and the secondary planetary assembly 44 are assembled with each other in the axial direction shown by the dotted line; the primary planet carrier 423 and the secondary sun gear 441 are circumferentially and relatively fixed, and the primary planet carrier 423 drives the secondary sun gear 441 to synchronously rotate.
The secondary sun gear 441 is meshed with and drives the secondary planet gear 442 to rotate the secondary planet gear 442, the periphery of the secondary planet gear 442 is meshed with the fixedly arranged gear ring 43, so that the secondary planet gear 442 revolves while rotating, the secondary planet gear 442 revolves to drive the secondary planet carrier 443 to rotate, the revolution of the secondary planet gear 442 and the rotation of the secondary planet carrier 443 are kept synchronous, the secondary planet carrier 443 drives the half shaft 2 to rotate through the differential 5, namely the secondary planet carrier 443 is directly connected with the input end of the differential 5, and the secondary planet carrier 443 directly inputs the rotation of the differential 5.
In the preferred embodiment of the utility model, a two-stage planetary reduction structure is arranged to realize speed reduction, and the two-stage planetary reduction structure is arranged along the axial direction, so that the radial size of the two-stage planetary reduction structure is not additionally increased compared with that of the one-stage planetary reduction structure.
Besides the scheme of adopting a two-stage speed reducing structure, if needed, more stages of planetary speed reducing structures can be added, and the transmission connection mode between each stage refers to the connection mode between the first-stage planetary assembly 42 and the second-stage planetary assembly 44, and the last-stage planetary speed reducing structure is directly connected with the input end of the differential 5.
Specifically, as shown in fig. 4, the primary planet carrier 423 and the secondary sun gear 441 are circumferentially fixed by spline fitting; inner teeth are arranged on the inner ring of the primary planet carrier 423, and the inner teeth of the primary planet carrier 423 are matched and meshed with the outer teeth of the secondary sun gear 441. A step surface is arranged on the secondary sun wheel 441, a step structure with an abrupt change in size is formed at the tail end of the secondary sun wheel 441, one side surface of the primary planet carrier 423 is propped against the step surface, the other side surface is axially limited through a retaining ring 444, and the retaining ring 444 is assembled on the secondary sun wheel 441. The secondary sun gear 441 is float mounted and the secondary planet carrier 443 is half float mounted.
Referring to fig. 3, a connecting flange 431 is provided on an outer side wall of the ring gear 43, the connecting flange 431 protrudes from the outer side wall of the ring gear 43 in the circumferential direction, the connecting flange 431 is clamped and fixed between the bridge 1 and the housing of the planetary gear 4, the connecting flange 431 is fixedly connected in the axial direction by bolts, and the bolts axially connect a section of the bridge 1, the connecting flange 431 and the housing of the planetary gear 4.
Specifically, the transmission gear set 41 in the present invention includes an input gear 411, an intermediate gear 412 and an output gear 413, the input gear 411, the intermediate gear 412 and the output gear 413 are axially parallel and can rotate respectively, the input gear 411 and the intermediate gear 412 are meshed with each other, and the intermediate gear 412 and the output gear 413 are meshed with each other; the half shaft 2 axially penetrates through the output gear 413, the output gear 413 is sleeved on the periphery of the half shaft 2, and the output gear 413 and the half shaft 2 rotate relatively and independently. Referring to fig. 5, a schematic diagram of the reduction transmission of the planetary reducer 4 is shown; the input gear 411 is directly driven by an output shaft of the driving motor 3, the input gear 411 is meshed with and drives the intermediate gear 412 to rotate, the intermediate gear 412 is meshed with and drives the output gear 413 to rotate, the output gear 413 synchronously drives the first-stage sun gear 421 to rotate, an integrated structure is adopted between the output gear 413 and the first-stage sun gear 421, spline connection can also be adopted, and the two keep synchronous rotation.
Preferably, the electromagnetic brake 6 is mounted on the planetary reducer 4, the electromagnetic brake 6 is used for parking and braking the transmission gear set 41, and when the vehicle stops, the electromagnetic brake 6 limits the gears in the transmission gear set 41 not to rotate, so that parking is realized.
Specifically, the intermediate gear 412 in the present invention is provided as a single gear, that is, only one intermediate gear 412 is provided in the axial direction, so that the space occupation in the axial direction is reduced, so that the electromagnetic brake 6 and the drive motor 3 are located between the two wheel brakes 7 in the axial direction; the electromagnetic brake 6 and the driving motor 3 are respectively positioned at two sides of the planetary reducer 4, and the electromagnetic brake 6 mainly acts on the input gear 411 to limit the input gear 411 from rotating.
Referring to fig. 4, three primary planet gears 422 are uniformly distributed in the circumferential direction, five secondary planet gears 442 are uniformly distributed in the circumferential direction, and the secondary planet assembly 44 adopts an NGW type planetary gear speed reduction structure.
Referring to fig. 1, the support plate 11 is fixedly arranged outside the bridge body 1 and connected to the vehicle body through the support plate 11, and the support plate 11 protrudes out of the outer surface of the bridge body 1 and is provided with a screw hole for fixedly connecting with a vehicle body bolt.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A bridge and box integrated drive axle comprises a bridge body (1), a half shaft (2) and a drive motor (3), and is characterized in that a planetary reducer (4) is mounted on the bridge body (1), and the planetary reducer (4) comprises a transmission gear set (41), a primary planetary assembly (42) and a gear ring (43);
the primary planetary assembly (42) comprises a primary sun gear (421), a primary planet gear (422) and a primary planet carrier (423); the half shaft (2) penetrates through the middles of the primary sun gear (421), the primary planet carrier (423) and the gear ring (43), a plurality of primary planet gears (422) are arranged on the periphery of the half shaft (2) in a surrounding mode, and the periphery of the primary planet gears (422) is meshed with the gear ring (43);
the driving motor (3) drives the primary sun gear (421) through the transmission gear set (41) in a meshing manner, the primary sun gear (421) drives the primary planet gear (422) in a meshing manner, and the primary planet gear (422) drives the primary planet carrier (423) to rotate; the primary planet carrier (423) directly or indirectly drives the half shaft (2) to rotate through the differential (5).
2. An axle-box integrated transaxle according to claim 1 wherein the planetary reducer (4) further comprises a secondary planetary assembly (44), the secondary planetary assembly (44) comprising a secondary sun gear (441), a secondary planet gear (442) and a secondary planet carrier (443);
the half shaft (2) penetrates through the secondary sun gear (441) and the secondary planet carrier (443) respectively, a plurality of secondary planet gears (442) are arranged around the outer periphery of the half shaft (2), and the outer periphery of the secondary planet gears (442) is meshed with the ring gear (43);
the primary planet carrier (423) and the secondary sun gear (441) are circumferentially and relatively fixed, the primary planet carrier (423) drives the secondary sun gear (441) to synchronously rotate, the secondary sun gear (441) is meshed with and drives the secondary planet gear (442), the secondary planet gear (442) drives the secondary planet carrier (443) to rotate, and the secondary planet carrier (443) drives the half shaft (2) to rotate through the differential (5).
3. The axle-box integrated drive axle according to claim 2, wherein the primary planet carrier (423) and the secondary sun gear (441) are circumferentially fixed by spline fitting;
the secondary sun gear (441) is provided with a step surface, one side surface of the primary planet carrier (423) is propped against the step surface, and the other side surface is axially limited through a retainer ring (444).
4. The axle-box integrated transaxle of claim 2 wherein an outer side wall of the ring gear (43) is provided with a connecting flange (431), and the connecting flange (431) is clamped and fixed between the axle body (1) and a housing of the planetary gear reducer (4).
5. The axle-box integrated transaxle of claim 2 wherein the drive gear set (41) comprises an input gear (411), an intermediate gear (412) and an output gear (413), the axle shaft (2) axially penetrating the output gear (413);
the input gear (411) is directly driven by an output shaft of the driving motor (3), the input gear (411) is meshed with and drives the intermediate gear (412), the intermediate gear (412) is meshed with and drives the output gear (413), and the output gear (413) synchronously drives the primary sun gear (421) to rotate.
6. The axle-box integrated transaxle of claim 5 wherein an electromagnetic brake (6) is mounted on the planetary gear reducer (4), the electromagnetic brake (6) being used to park brake the drive gear set (41).
7. Axle box integrated drive axle according to claim 6, characterised in that the intermediate gear (412) is provided as a single, the electromagnetic brake (6) and the drive motor (3) being located axially between two wheel brakes (7).
8. The axle box integrated drive axle of claim 2, characterized in that, the primary planet wheel (422) circumference equipartition sets up three, secondary planet wheel (442) circumference equipartition sets up five.
9. The axle box integrated drive axle according to claim 2, characterized in that a support plate (11) is fixedly arranged outside the axle body (1), and is connected to a vehicle body through the support plate (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121527222.0U CN215970951U (en) | 2021-07-06 | 2021-07-06 | Axle box integral type transaxle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121527222.0U CN215970951U (en) | 2021-07-06 | 2021-07-06 | Axle box integral type transaxle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215970951U true CN215970951U (en) | 2022-03-08 |
Family
ID=80515845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121527222.0U Active CN215970951U (en) | 2021-07-06 | 2021-07-06 | Axle box integral type transaxle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215970951U (en) |
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2021
- 2021-07-06 CN CN202121527222.0U patent/CN215970951U/en active Active
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