CN211398440U - Gear box and cross shaft heading machine - Google Patents

Abstract

The application discloses gear box and cross axle entry driving machine relates to the technical field of transmission structure to solve the technical problem that the structure is complicated among the prior art. The gear box comprises a box body, an input shaft, an output gear, a first output shaft and a second output shaft, wherein the input shaft is arranged in the box body, and the input gear is arranged on the input shaft; the output gear is arranged in the box body and is in transmission connection with the input gear, the output gear is provided with a through hole, the first output shaft is arranged in the box body, one end part of the first output shaft penetrates through the through hole and is fixedly connected with the output gear, and the other end part of the first output shaft extends out of the box body; and the second output shaft is arranged in the box body, one end part of the second output shaft penetrates through the through hole to be fixedly connected with the output gear, and the other end part of the second output shaft extends out of the box body. Therefore, the structure of the power transmission device is reduced in size, the number of transmission elements is reduced, the structure is simplified, the transmission efficiency is high, the power density is high, the failure rate is low, the production cost is reduced, and the assembly process is simple.

Description

Gear box and cross shaft heading machine

Technical Field

The application relates to the technical field of transmission structures, in particular to a gear box and a cross shaft heading machine.

Background

A Boring machine (Boring machine), which is a machine for cutting a roadway on a flat ground. Roadheader (Boringmachine), the commonly used has the cross axle roadheader, and it often includes running gear and working arm, is equipped with motor, gear box and cutting drum on the working arm, and the working arm is driven by running gear and is impeld forward, passes through cutting gear box drive two symmetrical cutting drum rotations through a motor after that, constantly breaks the rock through cutting drum.

In the prior art, the cutting gear box of the cross shaft heading machine needs to transmit the driving force of a motor to two symmetrical cutting rollers, so that a transmission structure with a first-stage bevel gear, a first-stage parallel gear and double planetary output is often adopted, the structure is complex, and the assembly process is complex.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a gearbox to solve the technical problem that the structure is complex in the prior art.

The application aims to provide a cross shaft heading machine to solve the technical problem of complex structure in the prior art.

The above technical problem of the present application is mainly solved by the following technical solutions:

a gear box comprises a box body, an input shaft, an output gear, a first output shaft and a second output shaft, wherein the input shaft is arranged in the box body, and the input gear is arranged on the input shaft; the output gear is arranged in the box body and is in transmission connection with the input gear, the output gear is provided with a through hole, the first output shaft is arranged in the box body, one end of the first output shaft penetrates through the through hole and is fixedly connected with the output gear, and the other end of the first output shaft extends out of the box body; and the second output shaft is arranged in the box body, one end part of the second output shaft penetrates through the through hole and is fixedly connected with the output gear, and the other end part of the second output shaft extends out of the box body.

In one embodiment, an inner spline is arranged on the inner wall of the through hole, and a first outer spline matched with the inner spline is arranged on the end part of the first output shaft; and a second external spline matched with the internal spline is arranged on the end part of the second output shaft.

In one embodiment, the box body is provided with an inner cavity, the box body is provided with an input hole and an output hole which are communicated with the inner cavity, and the number of the input holes is two, so that two ends of the input shaft can respectively penetrate through the two input holes; the number of the output holes is two, and the two output holes are respectively used for the first output shaft and the second output shaft to penetrate through.

In one embodiment, the gear box comprises two output transparent covers and two floating seal rings, wherein the two output transparent covers are respectively covered on the two output holes and are respectively fixedly connected with the first output shaft and the second output shaft; and the two floating sealing rings are respectively clamped between the box body and the two output transparent covers.

In an embodiment, the first output shaft includes a first head end, a first middle section and a first tail end, which are connected in sequence, the first head end is inserted into the through hole, and the first tail end passes through the output hole and is arranged to extend out of the box body.

In an embodiment, the second output shaft includes a second head end, a second middle section and a second tail end, which are connected in sequence, the second head end is inserted into the through hole, and the second tail end passes through the output hole and is arranged to extend out of the box body.

In one embodiment, the gearbox includes a first output bearing and a second output bearing, the first output bearing is sleeved outside the first middle section and is located in the output hole; the second output bearing is sleeved outside the second middle section and is positioned in the output hole.

In one embodiment, the outer diameter of the first middle section is smaller than the outer diameter of the first tail end to form a first tail shoulder for abutting against the first output bearing; and the outer diameter of the second middle section is smaller than that of the second tail end to form a second tail shaft shoulder which is used for abutting against the second output bearing.

In one embodiment, the first head end has an outer diameter less than an outer diameter of the first intermediate section, forming a first head shoulder; the outer diameter of the second head end is smaller than the outer diameter of the second middle section to form a second head shoulder.

In one embodiment, the gear box includes a first positioning ring and a second positioning ring, the first positioning ring is sleeved outside the first head end and clamped between the output gear and the first head shoulder; the second positioning ring is sleeved outside the second head end and clamped between the output gear and the second head shaft shoulder.

In one embodiment, there are two of the first output bearing and the second output bearing.

In an embodiment, two limiting grooves are respectively arranged on the inner walls of the two output holes and are respectively used for mounting the first output bearing and the second output bearing.

In one embodiment, a first thread is provided on an end of the first middle section away from the first tail shoulder; and a second thread is arranged on one end of the second middle section, which is far away from the second tail shaft shoulder.

In one embodiment, the gear box comprises a first lock nut, a first adjusting gasket and a first distance ring, wherein the first lock nut is sleeved outside the first middle section and matched with the first thread; the first adjusting gasket is sleeved outside the first middle section and clamped between the first locking nut and the first output bearing; the first distance ring is sleeved outside the first middle section and clamped between the two first output bearings.

In one embodiment, the gear box comprises a second locking nut, a second adjusting shim and a second distance ring, wherein the second locking nut is sleeved outside the second middle section and matched with the second thread; the second adjusting gasket is sleeved outside the second middle section and clamped between the second locking nut and the second output bearing; and the second distance ring is sleeved outside the middle section of the second and is clamped between the two second output bearings.

In one embodiment, the gear box comprises two bearing seats, two input bearings and two input transparent covers, wherein the two bearing seats are respectively arranged in the two input holes; the two input bearings are sleeved outside the input shaft and are respectively arranged in the two bearing blocks; the two input transparent covers are respectively covered on the two output holes and are respectively fixedly connected with the two bearing seats.

In one embodiment, the gearbox includes an intermediate shaft and an intermediate gear, the intermediate shaft is disposed in the box body, the intermediate gear is sleeved on the intermediate shaft and can rotate relative to the intermediate shaft, and the intermediate gear is engaged with the output gear and the input gear simultaneously.

In an embodiment, the inner wall of the inner cavity is provided with two middle holes, and the two middle holes are respectively used for fixing two end parts of the intermediate shaft.

In one embodiment, the intermediate gear has a through hole, two mounting grooves are formed in the inner wall of the through hole, the gear box includes a third distance ring, two fourth distance rings and two intermediate bearings, and the two intermediate bearings are respectively disposed in the two mounting grooves and sleeved outside the intermediate shaft; the third distance ring is sleeved outside the intermediate shaft and clamped between the two intermediate bearings; the two fourth distance ring sleeves are sleeved outside the intermediate shaft and respectively clamped between the box body and the two intermediate bearings.

In one embodiment, the first output shaft and the second output shaft are coaxially disposed.

In one embodiment, the input gear and the output gear are the same.

In an embodiment, the box includes middle case shell, left case shell and right case shell, and left case shell passes through fastening bolt and links to each other with middle case shell, and right case shell passes through fastening bolt and links to each other with middle case shell. Two output holes are respectively arranged on the left box shell and the right box shell, and two middle holes and two input holes are arranged on the middle box shell. The inner cavity refers to an inner area formed by the middle box shell, the left box shell and the right box shell together.

A cross shaft heading machine comprises a working arm and a gear box, wherein the working arm is provided with a motor and a cutting drum; the gear box is arranged on the working arm and is in transmission connection with the motor and the cutting drum, and the gear box is the gear box.

In one embodiment, the motor is in driving connection with the input shaft of the gearbox; the cutting drum is in transmission connection with the first output shaft and the second output shaft of the gear box.

Compared with the prior art, the beneficial effect of this application is: this application realizes power split through inserting two output shafts in the through hole of an output gear, has reduced the shared space of axle with the gear, has reduced the volume, and has reduced transmission element quantity, and the structure is retrencied, and transmission efficiency is higher, and power density is great, and the fault rate is lower, need not to set up bevel gear moreover, has reduced manufacturing cost for assembly process is comparatively simple.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic diagram of a gearbox according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a gearbox according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a gearbox according to one embodiment of the present application;

FIG. 4a is a cross-sectional view taken along line A-A of FIG. 1 of the present application;

FIG. 4b is a cross-sectional view taken along line A-A of FIG. 1 of the present application;

FIG. 5 is a cross-sectional view of a housing shown in an embodiment of the present application;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 1 of the present application;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 1 of the present application;

fig. 8 is a sectional view taken along line a-a of fig. 1 of the present application.

Icon: 100-a gearbox; 1-a box body; 11-lumen; 12-an input aperture; 121-a bearing seat; 122-input transparent cover; 13-an output aperture; 131-a limiting groove; 132-a positioning groove; 133-bevel groove; 134-a first convex ring; 14-a middle hole; 141-a fixed seat; 15-intermediate box shell; 16-left box shell; 17-right box shell; 18-a fastening bolt; 19-a flange; 2-an input shaft; 21-sixth distance ring; 22-fifth distance ring; 23-input bearing; 24-an input gear; 3-an output gear; 31-a through hole; 32-internal splines; 4-a first output shaft; 41-a first head end; 411 — first external spline; 42-a first intermediate section; 421-a first output bearing; 43-first end; 431-a first flange; 432 — a first spline; 44-a first head shoulder; 45-a first tail shoulder; 46-a first positioning ring; 47-first locking nut; 48-a first spacer; 49-a first distance ring; 5-a second output shaft; 51-a second head end; 511-a second male spline; 52-a second intermediate section; 521-a second output bearing; 53-second tail end; 531-second flange; 532-a second spline; 54-a second head shoulder; 55-a second tail shoulder; 56-a second positioning ring; 57-a second lock nut; 58-a second spacer; 59-a second distance ring; 6-output through cover; 61-floating seal ring; 62-positioning bolts; 7-intermediate shaft; 71-intermediate bearing; 72-a third distance ring; 73-fourth distance ring; 8-intermediate gear; 81-through holes; 811-mounting the recess; 812-a second torus; 91-a first straight line; 92-a second straight line; 93-a third line; 94-fourth line; 422-first thread; 522-second thread; 241-flat bond.

Detailed Description

The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.

In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1, a structural diagram of a gear box 100 according to an embodiment of the present application is shown. The cross shaft tunneling machine comprises a travelling mechanism, a working arm and a gear box 100, wherein the working arm is arranged on the travelling mechanism and can be driven by the travelling mechanism to advance, and a motor and two cutting drums are arranged on the working arm; a gear box 100 is provided on the work arm and is in driving connection with the motor and the cutting drums for transmitting the driving force of the motor to the two cutting drums. The gearbox 100 comprises a box body 1, wherein a flange 19 is arranged on the box body 1, and the box body 1 is fixed on the working arm through the flange 19.

Referring to fig. 2, a structural diagram of a gear box 100 according to an embodiment of the present application is shown. The cabinet 1 includes a middle case 15 (see fig. 5), a left case 16, and a right case 17, the left case 16 being connected to the middle case 15, and the right case 17 being connected to the middle case 15. The flange 19 is provided on the intermediate box housing 15.

The connection mode of the middle box shell 15 and the left box shell 16, the connection mode of the middle box shell 15 and the right box shell 17, and the connection mode of the middle box shell 15 and the working arm can be welding, pin shaft connection or bolt connection.

Referring to fig. 3, a cross-sectional view of the gear box 100 is shown according to an embodiment of the present application. An input shaft 2, an input gear 24, an output gear 3, a first output shaft 4 and a second output shaft 5 are arranged in the box body 1. The output gear 3 has a through hole 31. The end part of the input shaft 2 extends out of the box body 1 and is used for being in transmission connection with the motor and can be driven by the motor to rotate. The input gear 24 is fixedly connected with the input shaft 2 and can be driven by the input shaft 2 to rotate; the output gear 3 is in transmission connection with the input gear 24 and can be driven to rotate by the input gear 24. One end part of the first output shaft 4 penetrates through the through hole 31 to be fixedly connected with the output gear 3 and can be driven by the output gear 3 to rotate, and the other end part of the first output shaft 4 extends out of the box body 1 and is used for being connected with one cutting drum so as to drive the cutting drum to rotate; one end part of the second output shaft 5 penetrates through the through hole 31 to be fixedly connected with the output gear 3 and can be driven by the output gear 3 to rotate, and the other end part of the second output shaft 5 extends out of the box body 1 and is used for being connected with one cutting drum so as to drive the cutting drum to rotate.

An inner spline 32 is arranged on the inner wall of the through hole 31, and a first outer spline 411 matched with the inner spline 32 is arranged on the end part of the first output shaft 4; the end of the second output shaft 5 is provided with a second male spline 511 that fits the female spline 32.

In one embodiment, the input gear 24 and the output gear 3 have the same basic parameters of module, reference circle diameter, number of teeth, etc. In the present embodiment, the gear ratio of the gearbox 100 is 1.

Please refer to fig. 4a, which is a sectional view taken along a direction a-a of fig. 1 of the present application; the gearbox 100 further comprises an intermediate shaft 7 and an intermediate gear 8, wherein the intermediate gear 8 is sleeved on the intermediate shaft 7 and can rotate relative to the intermediate shaft 7, the intermediate shaft 7 is fixed in the box body 1 and does not rotate along with the rotation of the intermediate gear 8, and the intermediate gear 8 is meshed with the output gear 3 and the input gear 24 simultaneously.

The intermediate gear 8 is additionally arranged for increasing the distances between the first output shaft 4 and the input shaft 2 and between the second output shaft 5 and the input shaft 2, so that the mounting distance between the motor and the two cutting drums is reserved, and the mutual interference between the motor and the two cutting drums is avoided.

Please refer to fig. 4b, which is a sectional view taken along a-a of fig. 1. The axis of the first output shaft 4 and the axis of the second output shaft 5 both lie on a second straight line 92. The axis of the input shaft 2 is referred to as a first straight line 91, and the axis of the intermediate shaft 7 is referred to as a third straight line 93. The left casing 1 and the right casing 1 are arranged symmetrically along the fourth straight line 94, and the first output shaft 4 and the second output shaft 5 are also arranged symmetrically along the fourth straight line 94. The first line 91, the second line 92 and the third line 93 are parallel to each other, and the fourth line 94 is perpendicular to the first line 91.

The input gear 24 and the output gear 3 have the same basic parameters of module, reference circle diameter, tooth number and the like. In the present embodiment, the gear ratio of the gearbox 100 is 1. The pitch diameter of the intermediate gear 8 may be larger than, equal to or smaller than the pitch diameter of the input gear 24, and in one embodiment, the pitch diameter of the intermediate gear 8 is equal to the pitch diameter of the input gear 24.

In this embodiment, both ends of the input shaft 2 are extended out of the box body 1, so that both ends of the input shaft 2 can be respectively connected with the motors in a transmission manner, and the two motors drive one input shaft 2 at the same time, so that the size of the motors can be reduced.

In one embodiment, the input gear 24, the output gear 3 and the intermediate gear 8 are all involute cylindrical gears, and the input gear 24 and the output gear 3 have the same basic parameters such as module, reference circle diameter and tooth number.

The input gear 24 is fixedly connected to the input shaft 2 via a flat key 241. In an embodiment, the input gear 24 and the input shaft 2 may be integrally formed or connected by a spline connection, an interference connection, or the like. In an embodiment, the output gear 3 and the first output shaft 4, and the output gear 3 and the second output shaft 5 may be connected by a flat key connection, an interference connection, or the like.

In an operation process, the input shaft 2 is driven by the motor to rotate, so that the input gear 24 is driven to rotate, the input gear 24 rotates to drive the intermediate gear 8 to rotate, the intermediate gear 8 rotates to drive the output gear 3 to rotate, the output gear 3 rotates to simultaneously drive the first output shaft 4 and the second output shaft 5 to rotate, power split is realized, and finally, the first output shaft 4 and the second output shaft 5 respectively drive the two cutting drums for cutting.

In one embodiment, the intermediate shaft 7 may be rotatably disposed in the housing 1 through a bearing or other connection means, and the intermediate gear 8 and the intermediate shaft 7 may be fixedly connected by a key connection or the like such that the intermediate gear 8 can drive the intermediate shaft 7 to rotate.

Fig. 5 is a cross-sectional view of the box 1 according to an embodiment of the present application. The box body 1 is provided with an inner cavity 11, two input holes 12 and two output holes 13 which are communicated with the inner cavity 11 are arranged on the box body 1, wherein the two output holes 13 are respectively arranged on a left box shell 16 and a right box shell 17, and two middle holes 14 and two input holes 12 are arranged on a middle box shell 15. The inner chamber 11 is an inner region formed by the middle box shell 15, the left box shell 16 and the right box shell 17.

The left and right housings 16, 17 are identical in construction and are symmetrically disposed about a fourth line 94. In each outlet hole 13, a positioning groove 132 for mounting a seal ring is provided on an end of the outlet hole 13 away from the intermediate box casing 15. An inclined groove 133 is arranged at one end of the output hole 13 close to the middle box shell 15, and the inclined groove 133 is a circular truncated cone-shaped groove. The inner wall of the output hole 13 is provided with a first convex ring 134, which divides the output hole 13 into a left limiting groove 131 and a right limiting groove 131 for mounting a bearing. Seen in the direction away from the intermediate box shell 15, the output hole 13 is provided with a bevel groove 133, a limiting groove 131, a first convex ring 134, a limiting groove 131 and a positioning groove 132 in sequence. Wherein, the inner diameters of the two limiting grooves 131 are equal. To facilitate the installation of the bearing, the inner diameter of the positioning groove 132 is larger than the inner diameter of the limiting groove 131, and the minimum inner diameter of the inclined groove 133 is also larger than the inner diameter of the limiting groove 131.

The left casing 16 is connected to the intermediate casing 15 by fastening bolts 18, and the right casing 17 is connected to the intermediate casing 15 by fastening bolts 18.

Please refer to fig. 6, which is a sectional view taken along a-a of fig. 1. The gearbox 100 contains lubricating oil therein for lubricating and cooling the components within the gearbox 100. In one embodiment, the gearbox 100 is lubricated in a splash lubrication manner without a lubrication cooling system. The components within the left and right housings 16, 17 are identical and are symmetrically positioned along a fourth line 94. The first output shaft 4 and the second output shaft 5 have the same structure and are arranged symmetrically with respect to the fourth straight line 94.

The gear box 100 includes two output transparent covers 6 and two floating seal rings 61, the two output transparent covers 6 are respectively covered on the two output holes 13 (please refer to fig. 5) and are respectively fixedly connected with the first output shaft 4 and the second output shaft 5 through the positioning bolts 62, so that the first output shaft 4 and the second output shaft 5 can respectively drive the two output transparent covers 6 to rotate. The two floating seal rings 61 are disposed in the positioning groove 132 (see fig. 5), and are respectively clamped between the box 1 and the two output transparent covers 6 to seal the lubricating oil inside the gear box 100.

The first output shaft 4 comprises a first head end 41, a first intermediate section 42 and a first tail end 43 connected in series. The first head 41 is inserted into the through hole 31, and the first external spline 411 (see fig. 3) is disposed on the first head 41. First head end 41 has an outer diameter less than the outer diameter of first intermediate section 42, forming a first head shoulder 44; the first positioning ring 46 is sleeved outside the first head end 41 and clamped between the output gear 3 and the first head shoulder 44 to achieve axial positioning.

The first tail end 43 passes through the output hole 13 and through the output transparent cover 6 to be arranged to extend out of the box body 1. The first tail end 43 is provided with a first flange 431, the first flange 431 is fixedly connected with the output transparent cover 6 through a positioning bolt 62, the first tail end 43 is provided with a first spline 432 on the outer part extending out of the box body 1, and the first output shaft 4 is fixedly connected with a cutting drum through the first spline 432.

Two first output bearings 421 are sleeved outside the first middle section 42, and the two first output bearings 421 are installed in the limiting groove 131 (see fig. 5) of the output hole 13. For axial positioning, the first intermediate section 42 is sleeved with a first distance ring 49, and the first distance ring 49 is sandwiched between two first output bearings 421. To achieve axial positioning, the outer diameter of the first intermediate section 42 is smaller than the outer diameter of the first trailing end 43, forming a first trailing shoulder 45 for abutment against the first output bearing 421.

To achieve axial positioning, a first thread 422 is provided on the first intermediate section 42 at an end remote from the first aft shoulder 45; a first lock nut 47 is screwed on the first screw 422, a first adjusting gasket 48 is sleeved outside the first middle section 42, and the first adjusting gasket 48 is clamped between the first lock nut 47 and the first output bearing 421. Wherein the first lock nut 47 can also be used to adjust the axial play of the two first output bearings 421. The first locking nut 47 may be a round nut.

The second output shaft 5 includes a second head end 51, a second middle section 52 and a second tail end 53 connected in sequence. The second head end 51 is inserted into the through hole 31, and the second male spline 511 (see fig. 3) is disposed on the second head end 51. The outer diameter of second head end 51 is less than the outer diameter of second intermediate section 52, forming a second head shoulder 54; the second positioning ring 56 is sleeved outside the second head end 51 and clamped between the output gear 3 and the second head shoulder 54 to achieve axial positioning.

The second end 53 passes through the output aperture 13 and through the output transparent cover 6 to be disposed to protrude outside the tank 1. The second tail end 53 is provided with a second flange 531, the second flange 531 is fixedly connected with the output transparent cover 6 through a positioning bolt 62, the second tail end 53 is provided with a second spline 532 on the outer part extending out of the box body 1, and the second output shaft 5 is fixedly connected with a cutting drum through the second spline 532.

Two second output bearings 521 are sleeved outside the second middle section 52, and the two second output bearings 521 are installed in the limiting groove 131 (see fig. 5) of the output hole 13. For axial positioning, the second intermediate section 52 is sheathed with a second distance ring 59, and the second distance ring 59 is sandwiched between two second output bearings 521.

To achieve axial positioning, the second intermediate section 52 has an outer diameter smaller than the outer diameter of the second trailing end 53, forming a second trailing shoulder 55 for abutment against the second output bearing 521.

To achieve axial positioning, a second thread 522 is provided on second intermediate section 52 at an end remote from second aft shoulder 55; a second lock nut 57 is screwed on the second thread 522, a second adjusting shim 58 is sleeved outside the second middle section 52, and the second adjusting shim 58 is clamped between the second lock nut 57 and the second output bearing 521. Wherein the second lock nut 57 can also be used to adjust the axial play of the two second output bearings 521. The second lock nut 57 may be a round nut.

Please refer to fig. 7, which is a sectional view taken along a-a of fig. 1. The two input holes 12 (see fig. 5) are disposed opposite to each other, and a bearing seat 121 is disposed in each of the two input holes 12. The gearbox 100 includes two input bearings 23 and two input through covers 122, the two input bearings 23 are sleeved outside the input shaft 2 and are respectively arranged in the two bearing blocks 121; the two input transparent covers 122 are respectively covered on the two output holes 13 and are respectively fixedly connected with the two bearing seats 121 through bolts, and the input transparent covers 122 cannot rotate along with the rotation of the input shaft 2.

Please refer to fig. 8, which is a sectional view taken along a-a of fig. 1. The gearbox 100 comprises a fifth distance ring 22, the fifth distance ring 22 is sleeved outside the input shaft 2, passes through the input through cover 122 and abuts against the input bearing 23 to realize axial positioning; two sixth distance rings 21 are sleeved on the input shaft 2 and are respectively used for abutting against the two input bearings 23 so as to realize axial positioning. In an embodiment, both or one of the sixth distance rings 21 may be integrated with the input shaft 2.

The two middle holes 14 (see fig. 5) are disposed oppositely and each has a fixing seat 141. The intermediate shaft 7 is fixed to the fixing base 141 by means of bolts or the like. In one embodiment, the intermediate shaft 7 is an optical axis. A through hole is formed in one of the fixing seats 141, and a blind hole is formed in one of the fixing seats 141, so that the intermediate shaft 7 can be sequentially inserted into the fixing seat 141 having the through hole and the fixing seat 141 having the blind hole, and the intermediate shaft 7 is fixed to the fixing seat 141 having the through hole by bolts.

The intermediate gear 8 is provided with a through hole 81, a second convex ring 812 is arranged on the inner wall of the through hole 81 to form a left mounting groove 811 and a right mounting groove 811, the gear box 100 comprises a third distance ring 72, two fourth distance rings 73 and two intermediate bearings 71, and the two intermediate bearings 71 are respectively arranged in the two mounting grooves 811 and are sleeved outside the intermediate shaft 7; the third distance ring 72 is sleeved outside the intermediate shaft 7 and clamped between the two intermediate bearings 71 to realize axial positioning; the two fourth distance rings 73 are sleeved outside the intermediate shaft 7 and are respectively clamped between the box body 1 and the two intermediate bearings 71 to realize axial positioning.

In one embodiment, the first distance ring 49, the second distance ring 59, the third distance ring 72, the fourth distance ring 73 and the fifth distance ring 22 may be made of Polytetrafluoroethylene (PTFE) material or steel.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A gearbox, comprising:

a box body;

the input shaft is arranged in the box body, and an input gear is arranged on the input shaft;

an output gear which is arranged in the box body and is in transmission connection with the input gear, and the output gear is provided with a through hole,

the first output shaft is arranged in the box body, and one end part of the first output shaft penetrates through the through hole to be fixedly connected with the output gear; and

and the second output shaft is arranged in the box body, and one end part of the second output shaft penetrates through the through hole to be fixedly connected with the output gear.

2. The gearbox of claim 1, wherein an inner wall of the through hole is provided with an internal spline;

a first external spline matched with the internal spline is arranged on the end part of the first output shaft;

and a second external spline matched with the internal spline is arranged on the end part of the second output shaft.

3. A gearbox according to claim 1 in which the housing has an internal chamber and input and output apertures communicating with the internal chamber,

two input holes are formed in the input shaft and are respectively used for two ends of the input shaft to penetrate through;

the number of the output holes is two, and the two output holes are respectively used for the first output shaft and the second output shaft to penetrate through.

4. A gearbox according to claim 3, comprising:

the two output transparent covers are respectively covered on the two output holes and are respectively fixedly connected with the first output shaft and the second output shaft; and

and the two floating sealing rings are respectively clamped between the box body and the two output transparent covers.

5. A gearbox according to claim 4, comprising:

the first output bearing is sleeved outside the first output shaft and is positioned in the output hole; and

the second output bearing is sleeved outside the second output shaft and is positioned in the output hole;

the first output shaft comprises a first head end, a first middle section and a first tail end which are sequentially connected, the first head end is arranged in the through hole in a penetrating mode, and the first tail end penetrates through the output hole and is arranged to extend out of the box body; the outer diameter of the first middle section is smaller than that of the first tail end to form a first tail shaft shoulder which is used for abutting against the first output bearing;

the second output shaft comprises a second head end, a second middle section and a second tail end which are sequentially connected, the second head end is arranged in the through hole in a penetrating mode, and the second tail end penetrates through the output hole and is arranged to extend out of the box body; and the outer diameter of the second middle section is smaller than that of the second tail end to form a second tail shaft shoulder which is used for abutting against the second output bearing.

6. A gearbox according to claim 5, comprising:

the first positioning ring is sleeved outside the first head end, wherein the outer diameter of the first head end is smaller than that of the first middle section to form a first head shaft shoulder; the first positioning ring is clamped between the output gear and the first head shaft shoulder; and

and the second positioning ring is sleeved outside the second head end, wherein the outer diameter of the second head end is smaller than that of the middle section of the second head to form a second head shaft shoulder, and the second positioning ring is clamped between the output gear and the second head shaft shoulder.

7. A gearbox according to claim 6, comprising:

the first locking nut is sleeved outside the first middle section;

the first adjusting gasket is sleeved outside the first middle section and clamped between the first locking nut and the first output bearing;

the first distance ring is sleeved outside the first middle section and clamped between the two first output bearings;

the second locking nut is sleeved outside the second middle section;

the second adjusting gasket is sleeved outside the second middle section and clamped between the second locking nut and the second output bearing; and

the second distance ring is sleeved outside the second middle section and clamped between the two second output bearings;

the first output bearing and the second output bearing are respectively provided with two bearings; a first thread matched with the first locking nut is arranged on one end, far away from the first tail shaft shoulder, of the first middle section; and a second thread matched with the second locking nut is arranged on one end of the second middle section, which is far away from the second tail shaft shoulder.

8. A gearbox according to claim 3, comprising:

the two bearing blocks are respectively arranged in the two input holes;

the two input bearings are sleeved outside the input shaft and are respectively arranged in the two bearing blocks; and

and the two input transparent covers are respectively covered on the two output holes and are respectively fixedly connected with the two bearing seats.

9. Gearbox according to any of claims 1 to 8, comprising:

an intermediate shaft disposed in the case, an

The intermediate gear is sleeved on the intermediate shaft and can rotate relative to the intermediate shaft,

wherein the intermediate gear is simultaneously meshed with the output gear and the input gear.

10. A lateral shaft heading machine, comprising:

the working arm is provided with a motor and a cutting drum; and

a gearbox mounted on said working arm and drivingly connected to said motor and said cutting drum, said gearbox being as defined in any one of claims 1 to 9.

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