CN114623207A

CN114623207A - Gear box structure

Info

Publication number: CN114623207A
Application number: CN202210197599.7A
Authority: CN
Inventors: 吕海明; 杨兵
Original assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Current assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-06-14

Abstract

The invention relates to the technical field of gear boxes and discloses a gear box structure. The gear box structure comprises a planet stage which comprises a planet carrier, wherein the planet carrier comprises a planet carrier body and a positioning shaft, the positioning shaft is arranged at the output end of the planet carrier body, and a bulge is arranged on the circumferential surface of the positioning shaft and extends along the axial direction of the positioning shaft; parallel level, it includes the input gear shaft, and the one end that the input gear shaft is close to the location axle is provided with the hole, is provided with the recess on the wall of hole, and the recess extends along the axial of input gear shaft, and the location axle is located the downthehole, and the arch can the joint to the recess in. According to the gear box structure, the positioning shaft is arranged in the inner hole, so that the axial size between the planet carrier and the input gear shaft can be reduced, the axial occupied space of the whole gear box structure is smaller, and the miniaturization of the gear box structure is facilitated; and directly through the fixed mode of protruding joint in the recess, do not need additionally to use the shaft coupling, and then make whole assembling process comparatively simple.

Description

Gear box structure

Technical Field

The invention relates to the technical field of gear boxes, in particular to a gear box structure.

Background

The gearbox structure comprises a planetary stage at the front end and a parallel stage at the rear end; the planet stage comprises a planet carrier, the parallel stage comprises an input gear shaft, the planet carrier can output the power of the planet stage to the input gear shaft, and the power is transmitted to other required parts through the input gear shaft.

At present, a planet carrier and an input gear shaft are fixedly connected through a coupler, so that the planet carrier can transmit power to the input gear shaft; however, in this way, not only is an additional use of the coupling necessary, leading to a cumbersome assembly; but also results in a larger axial occupation space of the whole gearbox structure, which is not beneficial to the miniaturization of the gearbox structure.

Accordingly, there is a need for a gearbox configuration that addresses the above issues.

Disclosure of Invention

The invention aims to provide a gear box structure which is simple to assemble, can reduce the axial occupied area of the gear box structure and is beneficial to the miniaturization of the gear box structure.

In order to achieve the purpose, the invention adopts the following technical scheme:

a gearbox arrangement comprising:

the planet stage comprises a planet carrier, the planet carrier comprises a planet carrier body and a positioning shaft, the positioning shaft is arranged at the output end of the planet carrier body, and a bulge is arranged on the circumferential surface of the positioning shaft and extends along the axial direction of the positioning shaft;

parallel level, it includes the input gear shaft, the input gear shaft is close to the one end of location axle is provided with the hole, be provided with the recess on the wall of hole, the recess is followed the axial extension of input gear shaft, the location axle is located in the hole, just protruding can joint to in the recess.

Furthermore, it is protruding reach the recess all is provided with a plurality ofly, and is a plurality of protruding edge the circumference interval of location axle sets up, and is a plurality of the recess is followed the circumference interval of hole sets up, and is a plurality of protruding and a plurality of the recess one-to-one sets up.

Further, the height of the protrusion protruding in the radial direction of the positioning shaft is different from the depth of the groove recessed in the radial direction of the inner hole.

Furthermore, the positioning shaft comprises a fixing section and a positioning section, the diameter of the positioning section is smaller than that of the fixing section, the protrusion is arranged on the fixing section, the inner hole comprises a fixing hole and a positioning hole, the aperture of the positioning hole is smaller than that of the fixing hole, the groove is arranged on the inner wall of the fixing hole, the positioning section is inserted into the positioning hole, and the fixing section is located in the fixing hole.

Further, the positioning shaft and the planet carrier body are of an integrally formed structure or a split structure.

Further, the axis of the positioning shaft coincides with the axis of the input gear shaft.

Further, the planetary stage further comprises:

sun gear axle, sun gear, planet wheel, planet axle and ring gear, the fixed cover of sun gear is established the sun gear epaxially, the fixed cover of planet wheel is established the planet is epaxial, the one end of planet wheel with the sun gear meshing is connected, the other end of planet wheel with the ring gear meshing is connected, planet axle fixed connection to planet carrier body.

Further, a first bearing is arranged between the input gear shaft and the gear ring, and a second bearing is arranged between the planet carrier body and the gear ring.

Further, the planet wheel is supported on the planet shaft by a third bearing.

Further, be provided with the mounting hole on the planet carrier body, planet axle interference fit extremely in the mounting hole.

The invention has the beneficial effects that:

the planet carrier of the planet stage comprises a planet carrier body and a positioning shaft, the positioning shaft is arranged at the output end of the planet carrier body, and a bulge extending along the axial direction of the positioning shaft is arranged on the circumferential surface of the positioning shaft; meanwhile, an inner hole is arranged at one end, close to the positioning shaft, of the input gear shaft of the parallel stage, and a groove extending along the axial direction of the input gear shaft is arranged on the wall surface of the inner hole; then the positioning shaft is arranged in the inner hole, so that the protrusion is clamped in the groove, and the fixed connection between the planet carrier and the input gear shaft is further realized, so that the planet carrier can transmit power to the input gear shaft; in this way, the positioning shaft is arranged in the inner hole, so that the axial size between the planet carrier and the input gear shaft can be reduced, the axial occupied space of the whole gear box structure is smaller, and the miniaturization of the gear box structure is facilitated; and directly through the fixed mode of protruding joint in the recess, do not need additionally to use the shaft coupling, and then make whole assembling process comparatively simple.

Drawings

FIG. 1 is a schematic structural view of a gearbox configuration provided by the present invention.

Reference numerals:

1-planetary grade; 11-a planet carrier; 111-a planet carrier body; 112-positioning the shaft; 1121-fixed section; 1122-a positioning section; 12-sun gear shaft; 13-sun gear; 14-a planet wheel; 15-planet axis; 16-a gear ring; 17-a first bearing; 18-a second bearing; 19-a third bearing;

2-parallel stage; 21-input gear shaft; 211-inner bore; 2111-locating holes; 2112-fixation holes.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the structures or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Currently, gearbox structures include a planetary stage at the front end and a parallel stage at the rear end; the planetary stage comprises a planetary carrier, the parallel stage comprises an input gear shaft, and the planetary carrier can output the power of the planetary stage to the input gear shaft and transmit the power to other required parts through the input gear shaft. The planet carrier is fixedly connected with the input gear shaft through a coupler, so that the planet carrier can transmit power to the input gear shaft; however, in this way, not only is an additional use of the coupling necessary, leading to a cumbersome assembly; but also results in a larger axial occupation space of the whole gearbox structure, which is not beneficial to the miniaturization of the gearbox structure.

To this end, the present embodiment proposes a gearbox structure, as shown in fig. 1, comprising a planetary stage 1 at the front end and a parallel stage 2 at the rear end, the planetary stage 1 being capable of transmitting power to the parallel stage 2. The planet stage 1 comprises a planet carrier 11, the planet carrier 11 comprises a planet carrier body 111 and a positioning shaft 112, the positioning shaft 112 is arranged at the output end of the planet carrier body 111, and a bulge is arranged on the circumferential surface of the positioning shaft 112 and extends along the axial direction of the positioning shaft 112; parallel level 2 includes input gear shaft 21, and input gear shaft 21 is close to the one end of location axle 112 and is provided with hole 211, is provided with the recess on the internal wall face of hole 211, and the axial extension of input gear shaft 21 is followed to the recess, and location axle 112 is located hole 211, and the arch can be in the joint to the recess to be connected input gear shaft 21 and location axle 112. Wherein the axis of the positioning shaft 112 coincides with the axis of the input pinion 21.

Compared with the prior art, the gear box structure in the embodiment changes the connection mode between the planet carrier 11 and the input gear shaft 21, the positioning shaft 112 is arranged at the output end of the planet carrier body 111, and the circumferential surface of the positioning shaft 112 is provided with a bulge extending along the axial direction of the positioning shaft 112; meanwhile, an inner hole 211 is arranged at one end, close to the positioning shaft 112, of the input gear shaft 21 of the parallel stage 2, and a groove extending along the axial direction of the input gear shaft 21 is arranged on the wall surface of the inner hole 211; then, the positioning shaft 112 is arranged in the inner hole 211, so that the protrusion is clamped in the groove, and further, the fixed connection between the planet carrier 11 and the input gear shaft 21 is realized, so that the planet carrier 11 can transmit power to the input gear shaft 21; in this way, the positioning shaft 112 is arranged in the inner hole 211, so that the positioning shaft 112 and the input gear shaft 21 are partially overlapped, and further, the axial dimension between the planet carrier 11 and the input gear shaft 21 can be reduced, so that the axial occupied space of the whole gearbox structure is smaller, the structure of the gearbox structure is more compact and simple, the whole machine weight of the whole gearbox structure can be reduced, and the miniaturization of the gearbox structure is facilitated; in addition, the fixing mode that the bulge is clamped in the groove is adopted, so that a coupler is not required to be additionally used, and the whole assembly process is simpler; and the clamping mode is adopted, the disassembly is convenient, and meanwhile, the use cost of the coupler is saved due to the fact that the coupler is not needed, so that the production cost of the gear box structure can be reduced.

Furthermore, a plurality of protrusions and a plurality of grooves are arranged, the plurality of protrusions are arranged at intervals along the circumferential direction of the positioning shaft 112, namely the plurality of protrusions are annularly arranged on the outer circumferential surface of the positioning shaft 112, and the plurality of grooves are arranged at intervals along the circumferential direction of the inner hole 211, namely the plurality of grooves are annularly arranged on the inner circumferential wall surface of the inner hole 211; and a plurality of archs set up with a plurality of recesses one-to-one, and a protruding joint is in a recess promptly.

Through making a plurality of protruding one-to-one ground joint in a plurality of recesses, can make the location axle 112 comparatively firm with being connected between the input gear shaft 21, the problem that location axle 112 and input gear shaft 21 break away from each other can not appear, and then makes the connection reliability between planet carrier 11 and the input gear shaft 21 higher.

Specifically, the height of the projection projecting in the radial direction of the positioning shaft 112 is different from the depth of the recess recessed in the radial direction of the inner hole 211; when the protrusion is engaged with the recess, a backlash can be formed between the outer peripheral surface of the positioning shaft 112 and the inner wall surface of the inner hole 211 of the input pinion 21, so that the positioning shaft 112 can smoothly transmit the torque to the input pinion 21.

Further, as shown in fig. 1, the positioning shaft 112 includes a fixing section 1121 and a positioning section 1122, the diameter of the positioning section 1122 is smaller than the diameter of the fixing section 1121, the protrusion is disposed on the fixing section 1121, the inner hole 211 includes a fixing hole 2112 and a positioning hole 2111, the aperture of the positioning hole 2111 is smaller than the aperture of the fixing hole 2112, and the groove is disposed on the inner wall of the fixing hole 2112. The positioning section 1122 is inserted into the positioning hole 2111 to position the positioning shaft 112 and the input gear shaft 21, and the fixing section 1121 is located in the fixing hole 2112 to connect the positioning shaft 112 and the input gear shaft 21. The positioning shaft 112 and the planet carrier body 111 may be an integrally formed structure or a split structure. In this embodiment, the positioning shaft 112 and the planet carrier body 111 are integrally formed.

Specifically, as shown in fig. 1, the planet stage 1 further includes a sun gear shaft 12, a sun gear 13, a planet gear 14, a planet shaft 15, and a gear ring 16, the sun gear 13 is fixedly sleeved on the sun gear shaft 12, the planet gear 14 is fixedly sleeved on the planet shaft 15, one end of the planet gear 14 is meshed with the sun gear 13, the other end of the planet gear 14 is meshed with the gear ring 16, and the planet shaft 15 is fixedly connected to the planet carrier body 111. Wherein, be provided with the mounting hole on planet carrier body 111, in the interference fit of planet axle 15 arrives the mounting hole to make the motion of planet carrier body 111 can be synchronous with the motion of planet axle 15. The ring gear 16 in this embodiment is provided with meshing teeth on both the inner and outer sides.

When the sun gear shaft 12 rotates, the sun gear shaft 12 drives the sun gear 13 to rotate, the sun gear 13 drives the planet gear 14 to rotate, the planet gear 14 drives the planet shaft 15 to rotate, the planet shaft 15 rotates to drive the planet carrier body 111 to rotate, the planet carrier body 111 drives the positioning shaft 112 to rotate, and the positioning shaft 112 rotates to drive the input gear shaft 21 to rotate. Wherein, the output end of the input gear shaft 21 is connected with the equipment to drive the equipment to operate. In this embodiment, the device may specifically be a hydraulic pump, and the output end of the input gear shaft 21 is connected to the input shaft of the hydraulic pump through a spline, so as to drive the hydraulic pump to work.

Specifically, as shown in fig. 1, a first bearing 17 is provided between the input gear shaft 21 and the ring gear 16, a second bearing 18 is provided between the carrier body 111 and the ring gear 16, and the planet gears 14 are supported on the planet shaft 15 through a third bearing 19, so that the motion of the planet stage 1 can be relatively smooth, and the power of the planet stage 1 can be relatively smoothly transmitted to the parallel stage 2.

The specific assembly process between the carrier 11 and the input pinion 21 in this embodiment is as follows:

first, the positioning shaft 112 is inserted into the inner hole 211, so that the positioning section 1122 of the positioning shaft 112 is inserted into the positioning hole 2111 of the inner hole 211, and the positioning shaft 112 and the input gear shaft 21 are positioned.

Then, the protrusion on the fixing segment 1121 is engaged with the groove of the fixing hole 2112, so as to complete the connection between the positioning shaft 112 and the input gear shaft 21, thereby completing the connection between the planet carrier 11 and the input gear shaft 21.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. A gearbox arrangement, comprising:

the planet stage (1) comprises a planet carrier (11), the planet carrier (11) comprises a planet carrier body (111) and a positioning shaft (112), the positioning shaft (112) is arranged at the output end of the planet carrier body (111), the circumferential surface of the positioning shaft (112) is provided with a bulge, and the bulge extends along the axial direction of the positioning shaft (112);

parallel stage (2), it includes input gear shaft (21), input gear shaft (21) are close to the one end of location axle (112) is provided with hole (211), be provided with the recess on the wall of hole (211), the recess is followed the axial extension of input gear shaft (21), location axle (112) are located in hole (211), just protruding can joint to in the recess.

2. The gearbox arrangement of claim 1, wherein a plurality of the protrusions and the recesses are provided, the plurality of the protrusions are spaced apart along a circumference of the positioning shaft (112), the plurality of the recesses are spaced apart along a circumference of the inner bore (211), and the plurality of the protrusions and the plurality of the recesses are provided in a one-to-one correspondence.

3. The gearbox arrangement of claim 1, characterized in that the height of the projection projecting radially of the positioning shaft (112) and the depth of the recess recessed radially of the inner bore (211) are different.

4. The gearbox structure according to claim 1, wherein the positioning shaft (112) comprises a fixing section (1121) and a positioning section (1122), the diameter of the positioning section (1122) is smaller than that of the fixing section (1121), the protrusion is disposed on the fixing section (1121), the inner hole (211) comprises a fixing hole (2112) and a positioning hole (2111), the aperture of the positioning hole (2111) is smaller than that of the fixing hole (2112), the groove is disposed on the inner wall of the fixing hole (2112), the positioning section (1122) is inserted into the positioning hole (2111), and the fixing section (1121) is located in the fixing hole (2112).

5. The gearbox arrangement according to claim 1, characterised in that the positioning shaft (112) is of an integrated or split construction with the planet carrier body (111).

6. A gearbox arrangement according to claim 1, characterised in that the axis of the positioning shaft (112) coincides with the axis of the input gear shaft (21).

7. Gearbox arrangement according to any of claims 1-6, characterised in that the planetary stage (1) further comprises:

the sun gear comprises a sun gear shaft (12), a sun gear (13), a planet gear (14), a planet shaft (15) and a gear ring (16), wherein the sun gear (13) is fixedly sleeved on the sun gear shaft (12), the planet gear (14) is fixedly sleeved on the planet shaft (15), one end of the planet gear (14) is meshed with the sun gear (13) and is connected with the gear ring (16), the other end of the planet gear (14) is meshed with the gear ring (16) and is connected with the planet carrier body (111), and the planet shaft (15) is fixedly connected with the planet carrier body (111).

8. Gearbox arrangement according to claim 7, characterised in that a first bearing (17) is arranged between the input gear shaft (21) and the ring gear (16), and a second bearing (18) is arranged between the planet carrier body (111) and the ring gear (16).

9. Gearbox arrangement according to claim 7, characterised in that the planet wheels (14) are supported on the planet shaft (15) by means of a third bearing (19).

10. Gearbox arrangement according to claim 7, characterised in that said planet carrier body (111) is provided with mounting holes into which said planet shafts (15) are interference fitted.