CN210920039U - Tractor power take off structure and tractor - Google Patents
Tractor power take off structure and tractor Download PDFInfo
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- CN210920039U CN210920039U CN201922054451.4U CN201922054451U CN210920039U CN 210920039 U CN210920039 U CN 210920039U CN 201922054451 U CN201922054451 U CN 201922054451U CN 210920039 U CN210920039 U CN 210920039U
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Abstract
The utility model relates to a tractor power take off structure and tractor, including power take off drive mechanism, power take off shaft and anticreep blanking cover, one side of power take off drive mechanism is seted up the step hole, and power take off shaft radially extends outwards and forms the shaft shoulder arch, and one end of power take off shaft inserts the step hole and one side of shaft shoulder arch and the step face butt in step hole; the anti-blocking cover is sleeved on the power output shaft and is abutted to the other side of the shaft shoulder, and the anti-blocking cover is fixedly connected to the power output transmission mechanism through a first bolt. The power output shaft is easy and quick to replace and convenient to disassemble and assemble, and can meet the use requirements of various agricultural implements; compared with a flange-type replaceable power output shaft, the flange plate, the connecting bolt and other structures are removed, so that the cost is reduced; the power output shaft can be effectively prevented from being separated when the power output shaft is acted by an axial force, the performance is stable, the reliability is high, and the use requirement of the power output device during operation is ensured.
Description
Technical Field
The utility model relates to a tractor field especially relates to a tractor power take off structure.
Background
The tractor power output device is a working device which transmits partial or all power of a tractor engine to an agricultural implement in a mode of rotating mechanical energy. The rear power output shaft is an output part for transmitting rotary power to the agricultural implement from the rear part of the tractor.
The farm implements matched with the rear power output shaft of the tractor are various in types, and the shaft heads of the power output shafts with various spline specifications are required; in the actual work of the power output shaft, the stress state is complex and changeable, the failure rate is high, and the requirement on the maintenance convenience is high.
In order to meet the requirements, the tractor mostly adopts a solution scheme of replacing an external power output shaft. A flange disc type and an inner inserting type replaceable power output shaft are generally adopted.
The power output shaft of the existing tractor is abutted against a check ring through a shaft shoulder or is connected with a power output inner transmission shaft through a flange plate and a bolt to limit the axial movement of the power output shaft, and in the former mode, when the power output shaft bears large axial force, the power output shaft is easy to be separated from the inner part of a rear axle, which is not beneficial to the normal operation of the tractor; the latter method is simple, but has low reliability, and the power output shaft is easy to be separated.
In the operation process, the stress state of the power output shaft is complex, and when the machine is lifted, the power output shaft is stressed by axial force and is easy to separate, so that parts are damaged, and the operation efficiency is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the power take-off structure of a tractor is provided aiming at the defects of the prior art so as to solve at least one of the technical problems.
On the one hand, the utility model provides a technical scheme as follows of above-mentioned technical problem: a power output structure of a tractor comprises a power output transmission mechanism, a power output shaft and an anti-blocking cover, wherein one end of the power output transmission mechanism is provided with a step hole, the power output shaft extends outwards along the radial direction to form a shaft shoulder bulge, one end of the power output shaft is inserted into the step hole, and one side of the shaft shoulder bulge is abutted against the step surface of the step hole; the anti-blocking cover is sleeved on the power output shaft and is abutted to the other side of the shaft shoulder, and the anti-blocking cover is fixedly connected to the power output transmission mechanism through a first bolt.
The utility model has the advantages that: when the power output shaft is subjected to forward axial force, the power output shaft is abutted against the step surface through the shaft shoulder bulge, so that the power output shaft is prevented from being pulled out forwards; when the power output shaft is subjected to backward axial force, the power output shaft abuts against the anti-blocking cover through the shaft shoulder protrusion, and the anti-blocking cover is fixedly connected to the power output transmission mechanism, so that the power output shaft is effectively prevented from being pulled out backwards; the external and internal insertion type power output shaft is simple and quick to replace and convenient to disassemble and assemble, and can meet the use requirements of various agricultural implements; compared with a flange-type replaceable power output shaft, the flange plate, the connecting bolt and other structures are removed, so that the cost is reduced; the power output shaft can be effectively prevented from falling off when the power output shaft is acted by an axial force, the performance is stable, the reliability is high, and the use requirement of the power output device during operation is ensured; the utility model discloses a simple anticreep blanking cover and first bolted connection pass through the shoulder arch with power output shaft and support on power take off drive mechanism, prevent to deviate from around it, simple structure, the modern design.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the power output transmission mechanism comprises a driving device, a power output transmission shaft, a shell and an oil seal assembly,
the driving device drives the power output transmission shaft to rotate;
the shell is sleeved on the power output transmission shaft and limits the axial movement of the power output transmission shaft;
one end of the power output transmission shaft is provided with a step hole along the axial direction; the anti-blocking cover is fixedly connected to the power output transmission shaft through a first bolt;
the inner ring of the oil seal assembly is sleeved on the power output transmission shaft, the outer ring of the oil seal assembly abuts against the inner side of the shell, and the oil seal assembly seals the space between the power output transmission shaft and the shell.
The beneficial effect of adopting the further scheme is that: when the power output shaft is subjected to backward axial force, the power output shaft is abutted against the anti-blocking cover through the shaft shoulder protrusion, the anti-blocking cover is fixedly connected to the power output transmission shaft, and the axial movement of the power output transmission shaft is limited by the shell, so that the power output shaft is effectively prevented from being pulled out backwards; meanwhile, when the power output shaft is subjected to forward axial force, the power output shaft abuts against the step surface through the shaft shoulder protrusion, and the shell limits the axial movement of the power output transmission shaft, so that the power output transmission shaft is prevented from being pulled out forwards; the utility model has the advantages that the power output shaft is supported on the shell through the shaft shoulder bulge through the simple anti-blocking cover and the first bolt connection, the front and the back of the power output shaft are prevented from being separated, and the structure is simple; meanwhile, the oil seal assembly is adopted for sealing between the power output transmission shaft and the shell, so that external water, steam, particles and the like can be effectively prevented from entering the shell, meanwhile, the leakage of oil liquid in the shell is also prevented, and the sealing effect is good.
Further, the shell comprises a rear axle shell and a bearing end cover, the rear axle shell and the bearing end cover are respectively sleeved on the power output transmission shaft, and the bearing end cover is fixedly connected with the rear axle shell; the bearing end cover and the rear axle housing respectively limit the axial movement of the power output transmission shaft.
The beneficial effect of adopting the further scheme is that: the bearing end cover is arranged, so that the purpose of convenient installation can be realized, and the later-stage inspection and maintenance are facilitated.
Further, the oil seal assembly comprises an oil seal and a check ring, the inner rings of the oil seal and the check ring are respectively sleeved on the power output transmission shaft, and the outer rings of the oil seal and the check ring are respectively abutted to the inner sides of the bearing end covers.
The beneficial effect of adopting the further scheme is that: the combination type seal of the oil seal and the check ring can effectively prevent external water, steam, particles and the like from entering the shell, and meanwhile, the oil liquid in the shell is prevented from leaking, so that the sealing effect is good.
Furthermore, the driving device is a gear transmission device and comprises a driving gear and a driven gear which are meshed with each other, and the driven gear is fixedly sleeved on the power output transmission shaft.
Further, the power output transmission shaft is abutted to the rear axle shell through a first bearing; the power output transmission shaft is abutted against the bearing end cover through a second bearing; the first bearing and the second bearing are respectively positioned at two sides of the driven gear; the first bearing retainer ring is arranged between the first bearing and the driven gear; a second bearing retainer ring is arranged between the second bearing and the driven gear.
The beneficial effect of adopting the further scheme is that: the friction coefficient in the rotation process is reduced by arranging the first bearing and the second bearing, and the rotation precision of the first bearing and the second bearing is ensured; the first bearing retainer ring and the second bearing retainer ring play a role in positioning and can bear vibration and load.
And the locking nut is in threaded connection with the power output transmission shaft and is abutted against one side of the first bearing far away from the first bearing retainer ring.
The beneficial effect of adopting the further scheme is that: the locking nut serves the purpose of positioning and locking.
Furthermore, the driving gear is a driving duplicate gear, the driven gear comprises an engagement sleeve, an engagement tooth seat, a low-grade driven gear and a high-grade driven gear, the driving duplicate gear is respectively engaged with the low-grade driven gear and the high-grade driven gear, the low-grade driven gear and the high-grade driven gear are respectively rotatably sleeved on the power output transmission shaft, the engagement tooth seat is arranged between the low-grade driven gear and the high-grade driven gear, the engagement tooth seat is fixedly sleeved on the power output transmission shaft, the engagement sleeve is sleeved outside the engagement tooth seat and engaged with the engagement tooth seat, and the engagement sleeve can axially slide on the engagement tooth seat;
when the meshing sleeve slides to the first position, the meshing tooth holder is connected with the low-gear driven gear through the meshing sleeve, and then the low-gear driven gear drives the meshing tooth holder to rotate; when the meshing sleeve slides to the second position, the meshing tooth holder is connected with the high-grade driven gear through the meshing sleeve, and then the high-grade driven gear drives the meshing tooth holder to rotate.
The beneficial effect of adopting the further scheme is that: the driven gears at different gears drive the power output transmission shaft to rotate by sliding of the meshing sleeve, so that different rotating speeds are obtained, and the rotating speed can be adjusted.
And the anti-blocking device further comprises a spring retainer ring, the spring retainer ring is arranged between the other side of the shaft shoulder bulge and the anti-blocking cover, and the outer ring of the spring retainer ring abuts against one end of the power output transmission mechanism.
The beneficial effect of adopting the further scheme is that: the spring collar protects the raised surface of the shaft shoulder from being scratched, disperses the pressure of the anti-falling blocking cover on the shaft shoulder and plays a role in limiting when the power output shaft moves axially.
On the other hand, the utility model provides a tractor, including foretell a tractor power take off structure.
The beneficial effect of this scheme is: this scheme has above-mentioned a tractor power take off structure's whole beneficial effect, just no longer gives unnecessary details here.
Drawings
FIG. 1 is a schematic view of a power output structure of a tractor according to the present invention;
fig. 2 is a partial enlarged view of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the power output shaft, 11, shaft shoulder bulge, 2, anti-blocking cover, 21, spring retainer, 22, first bolt, 3, power output transmission shaft, 4, rear axle housing, 5, bearing end cover, 51, second bolt, 6, driving gear, 7, driven gear, 71, meshing sleeve, 72, meshing toothholder, 73, low-grade driven gear, 74, high-grade driven gear, 8, first bearing, 9, second bearing, 10, lock nut, 12, oil seal assembly, 13, oil seal, 14, retainer.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1-2, a power output structure of a tractor comprises a power output transmission mechanism, a power output shaft 1 and an anti-blocking cover 2, wherein one end of the power output transmission mechanism is provided with a step hole, the power output shaft 1 extends outwards along a radial direction to form a shaft shoulder bulge 11, one end of the power output shaft 1 is inserted into the step hole, and one side of the shaft shoulder bulge 11 is abutted against a step surface of the step hole; the anti-blocking cover 2 is sleeved on the power output shaft 1 and is abutted to the other side of the shaft shoulder protrusion 11, and the anti-blocking cover 2 is fixedly connected to the power output transmission mechanism through a first bolt 22.
Preferably, the first bolt 22 is a socket head cap screw, when the power output shaft 1 receives a forward axial force, the power output shaft 1 abuts on the step surface through the shoulder protrusion 11, so that the power output shaft 1 is prevented from being pulled out forwards; when the power output shaft 1 is subjected to backward axial force, the power output shaft 1 abuts against the anti-blocking cover 2 through the shaft shoulder bulge 11, and the anti-blocking cover 2 is fixedly connected to the power output transmission mechanism, so that the power output shaft 1 is effectively prevented from being pulled out backwards; the external interpolation type power output shaft 1 is simple and quick to replace and convenient to disassemble and assemble, and can meet the use requirements of various agricultural implements; compared with a flange-type replaceable power output shaft, the flange plate, the connecting bolt and other structures are removed, so that the cost is reduced; when the power output shaft 1 is acted by an axial force, the power output shaft 1 can be effectively prevented from falling off, the performance is stable, the reliability is high, and the use requirement of the power output device during operation is ensured; the utility model discloses a simple anticreep blanking cover 2 and first bolt 22 are connected, support power output shaft 1 on power take off drive mechanism through the protruding 11 of shaft shoulder, prevent to deviate from around it, simple structure, novel in design.
As shown in fig. 1-2, a power output structure of a tractor, the power output transmission mechanism comprises a driving device, a power output transmission shaft 3, a shell and an oil seal assembly 12,
the driving device drives the power output transmission shaft 3 to rotate;
the shell is sleeved on the power output transmission shaft 3 and limits the axial movement of the power output transmission shaft 3;
one end of the power output transmission shaft 3 is provided with a step hole along the axial direction; the anti-blocking cover 2 is fixedly connected to the power output transmission shaft 3 through a first bolt 22;
the inner ring of the oil seal component 12 is sleeved on the power output transmission shaft 3, the outer ring is abutted against the inner side of the shell, and the oil seal component 12 seals the space between the power output transmission shaft 3 and the shell.
When the power output shaft 1 is subjected to backward axial force, the power output shaft 1 is abutted on the anti-blocking cover 2 through the shaft shoulder bulge 11, the anti-blocking cover 2 is fixedly connected to the power output transmission shaft 3, and the axial movement of the power output transmission shaft 3 is limited by the shell, so that the power output shaft 1 is effectively prevented from being pulled out backwards; meanwhile, when the power output shaft 1 is subjected to forward axial force, the power output shaft 1 abuts against the step surface through the shaft shoulder bulge 11, and the shell limits the axial movement of the power output transmission shaft 3, so that the power output transmission shaft 3 is prevented from being pulled out forwards; the utility model has the advantages that the power output shaft 1 is supported on the shell through the shaft shoulder bulge 11 through the simple connection of the anti-falling blocking cover 2 and the first bolt 22, so as to prevent the front and the back from being separated, and the structure is simple;
meanwhile, the oil seal assembly 12 is adopted for sealing between the power output transmission shaft 3 and the shell, so that external water, steam, particles and the like can be effectively prevented from entering the shell, meanwhile, the leakage of oil liquid in the shell is also prevented, and the sealing effect is good.
Preferably, as shown in fig. 1-2, the housing includes a rear axle housing 4 and a bearing end cover 5, the rear axle housing 4 and the bearing end cover 5 are respectively sleeved on the power output transmission shaft 3, and the bearing end cover 5 is fixedly connected with the rear axle housing 4; the bearing end cover 5 and the rear axle housing 4 respectively limit the axial movement of the power output transmission shaft 3.
Specifically, bearing housing 5 is connected with rear-axle housing 4 through second bolt 51, sets up bearing housing 5 and can realize easy to assemble's purpose, and the inspection maintenance in the later stage of being convenient for.
Preferably, the second bolt 51 is a stud.
Concretely, rear-axle housing 4 and the frame or the casing fixed connection of tractor, power output shaft 1 passes through shaft shoulder arch 11 respectively the butt on power take off transmission shaft 3 and anticreep blanking cover 2, anticreep blanking cover 2 is final fixed with power take off transmission shaft 3, and power take off transmission shaft 3 is final to be spacing by rear-axle housing 4, therefore power output shaft 1 is final to be spacing by rear-axle housing 4, prevent it and deviate from, do not change whole transmission route of tractor and shell body mechanism, only make partial change to power take off, can accomplish the modification.
As shown in fig. 1, in a power output structure of a tractor, an oil seal assembly 12 includes an oil seal 13 and a retainer ring 14, inner rings of the oil seal 13 and the retainer ring 14 are respectively sleeved on a power output transmission shaft 3, and outer rings thereof are respectively abutted against inner sides of bearing end covers 5.
Preferably, the oil seal 13 is an inner package framework type oil seal with an auxiliary lip, the retainer ring 14 is a retainer ring with a lip, and the oil seal 13 and the retainer ring 14 are sealed in a combined mode, so that external water, steam, particles and the like can be effectively prevented from entering the shell, meanwhile, oil liquid in the shell is prevented from leaking, and the sealing effect is good.
As shown in fig. 1, a power output structure of a tractor, a driving device is a gear transmission device, and comprises a driving gear 6 and a driven gear 7 which are meshed with each other, and a fixed sleeve of the driven gear is arranged on a power output transmission shaft 3. Specifically, the drive gear 6 is powered by a tractor.
As shown in fig. 1, in a power output structure of a tractor, a power output transmission shaft 3 is abutted against a rear axle housing 4 through a first bearing 8; the power output transmission shaft 3 is abutted against the bearing end cover 5 through a second bearing 9; the first bearing 8 and the second bearing 9 are respectively located on both sides of the driven gear 7.
Specifically, the first bearing 8 and the second bearing 9 are both tapered roller bearings, and friction coefficient in the rotating process is reduced by arranging the first bearing 8 and the second bearing 9, and the rotating precision of the bearings is ensured.
Preferably, the device also comprises a first bearing 8 retainer ring and a second bearing 9 retainer ring, wherein the first bearing 8 retainer ring is arranged between the first bearing 8 and the driven gear 7; a second bearing 9 retainer ring is arranged between the second bearing 9 and the driven gear 7.
The first bearing 8 retainer ring and the second bearing 9 retainer ring play a positioning purpose and can bear vibration and load.
As shown in fig. 1, the power output structure of the tractor further comprises a lock nut 10, wherein the lock nut 10 is in threaded connection with the power output transmission shaft 3 and is abutted against one side, away from a retainer ring of the first bearing 8, of the first bearing 8. Specifically, the outer race of the first bearing 8 abuts on the rear axle housing 4, and the lock nut 10 abuts on the inner race of the first bearing 8.
The lock nut 10 serves the purpose of positioning and locking.
As shown in fig. 1, in a power output structure of a tractor, a driving gear 6 is a driving duplicate gear, a driven gear 7 includes an engaging sleeve 71, an engaging tooth seat 72, a low-gear driven gear 73 and a high-gear driven gear 74, the driving duplicate gear is respectively engaged with the low-gear driven gear 73 and the high-gear driven gear 74, the low-gear driven gear 73 and the high-gear driven gear 74 are respectively rotatably sleeved on a power output transmission shaft 3, the engaging tooth seat 72 is arranged between the low-gear driven gear 73 and the high-gear driven gear 74, the engaging tooth seat 72 is fixedly sleeved on the power output transmission shaft 7, the engaging sleeve 71 is sleeved outside the engaging tooth seat 72 and is engaged with the engaging tooth seat 72, and the engaging sleeve 71 can axially slide on the engaging tooth seat 72;
when the meshing sleeve 71 slides to the first position, the meshing tooth holder 72 is connected with the low-gear driven gear 73 through the meshing sleeve 71, and then the low-gear driven gear 73 drives the meshing tooth holder 72 to rotate; when the engaging sleeve 71 slides to the second position, the engaging tooth holder 72 is connected with the high-gear driven gear 74 through the engaging sleeve 71, and then the high-gear driven gear 74 drives the engaging tooth holder 72 to rotate.
Specifically, how to push or control the sliding of the engaging sleeve 71 is a conventional means in the art, and will not be described herein.
Specifically, the meshing tooth holder 72, the low-gear driven gear 73 and the high-gear driven gear 74 are respectively in splined connection with the meshing sleeve 71, and the driven gears 7 at different gears drive the power output transmission shaft 3 to rotate by sliding of the meshing sleeve 71, so that different rotating speeds are obtained, and the rotating speed can be adjusted.
As shown in fig. 1, the power output structure of the tractor further comprises a spring retainer ring 21, wherein the spring retainer ring 21 is arranged between the other side of the shaft shoulder protrusion 11 and the anti-blocking cover 2, and the outer ring of the spring retainer ring 21 abuts against one end of the power output transmission mechanism.
Specifically, the outer lane butt of circlip 21 is in the one end of power take off transmission shaft 3, and the one end that power take off transmission shaft 3 is close to anticreep blanking cover 2 is equipped with the snap ring groove, and circlip 21 assembles in power take off transmission shaft 3's snap ring groove, and circlip 21 protects the protruding 11 surfaces of shaft shoulder not receive the scotch, and the pressure of dispersion anticreep blanking cover 2 to the protruding 11 of shaft shoulder plays limiting displacement simultaneously when power take off shaft 1 axial displacement.
Specifically, as shown in fig. 1, the present embodiment includes a driving duplicate gear, a low-gear driven gear 7, a high-gear driven gear 7, a first bearing 8, a lock nut 10, a power output transmission shaft 3, an engagement gear seat 72, an engagement sleeve 71, a second bearing 9, a bearing end cover 5, a spring retainer ring 21, an anti-slip cover 2, a power output shaft 1, a first bolt 22, a second bolt 51, and a rear axle housing 4, where the low-gear driven gear 73 and the high-gear driven gear 74 are respectively engaged with the driving duplicate gear, the engagement sleeve 71 can slide left and right on the engagement gear seat 72 and respectively connected with the low-gear driven gear 73, the high-gear driven gear 74, and the engagement gear seat 72 through splines, the engagement gear seat 72 is connected with the power output transmission shaft 3 through splines, the power output transmission shaft 3 is connected with the power output shaft 1 through splines, the lock nut 10 is connected with the power output transmission shaft 3 through, a snap ring groove is formed in a step hole of the power output transmission shaft 3, the spring retainer ring 21 is assembled on the snap ring groove, the anti-blocking cover 2 is fixed on the power output transmission shaft 3 through a first bolt 22, and the bearing end cover 5 is fixed on the rear axle housing 4 through a second bolt 51.
The power output transmission shaft 3 is respectively abutted with the inner rings of the first bearing 8 and the second bearing 9 through a lock nut 10, the outer ring of the first bearing 8 is abutted on the rear axle housing 4, the outer ring of the second bearing 9 is abutted on the bearing end cover 5, and the bearing end cover 5 is fixed on the rear axle housing 4 through a second bolt 51; power output shaft 1 inserts inside power take off transmission shaft 3, and power output shaft 1 one end is through protruding 11 butt of shaft shoulder on 3 with power take off transmission shaft, and the other end passes through protruding 11 butt of shaft shoulder on spring collar 21, and spring collar 21 assembles in power take off transmission shaft 3's snap ring inslot, and the one end butt of keeping away from power output shaft 1 is on anticreep blanking cover 2, and anticreep blanking cover 2 is fixed on power take off transmission shaft 3 through first bolt 22.
When the power output shaft 1 is subjected to forward axial force, the power output shaft 1 abuts against the power output transmission shaft 3 through the shaft shoulder bulge 11, and the power output transmission shaft 3 abuts against the rear axle housing 4 through the outer ring of the first bearing 8, so that the power output shaft 1 is prevented from being pulled out forwards; when power output shaft 1 receives backward axial force, power output shaft 1 passes through the protruding 11 butt of shaft shoulder on spring collar 21, spring collar 21 butt is on anti-disengaging blanking cover 2, anti-disengaging blanking cover 2 fixes on power output transmission shaft 3, power output transmission shaft 3 passes through the outer lane butt of second bearing 9 on bearing cap 5, and bearing cap 5 passes through second bolt 51 and fixes on rear axle housing 4 to effectively prevent that power output shaft 1 from deviating from backward.
In this embodiment, the power output shaft 1 can be replaced only by detaching the spring retainer ring 21 and the anti-dropping blocking cover 2 from the power output transmission shaft 3, the power output shaft 1 is simple and convenient to replace, and the use requirements of different agricultural implements can be met.
In the present embodiment, the power output transmission route is: the driving duplicate gear → the low-gear driven gear 73 or the high-gear driven gear 74 → the engaging sleeve 71 → the engaging tooth holder 72 → the power output transmission shaft 3 → the power output shaft 1.
Example 2
A tractor comprises the power output structure of the tractor.
The beneficial effect of this embodiment is: the embodiment has all the advantages of the power output structure of the tractor, and the description is omitted here.
In the description herein, reference to the terms "embodiment one," "embodiment two," "example," "specific example," or "some examples," etc., means that a particular method, apparatus, or feature described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, methods, apparatuses, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A power output structure of a tractor is characterized by comprising a power output transmission mechanism, a power output shaft and an anti-blocking cover, wherein a step hole is formed in one end of the power output transmission mechanism, the power output shaft extends outwards in the radial direction to form a shaft shoulder bulge, one end of the power output shaft is inserted into the step hole, and one side of the shaft shoulder bulge is abutted to the step surface of the step hole; the anti-blocking cover is sleeved on the power output shaft and is abutted against the other side of the shaft shoulder, and the anti-blocking cover is fixedly connected to the power output transmission mechanism through a first bolt.
2. A tractor power take off structure as claimed in claim 1, wherein the power take off drive mechanism includes a drive means, a power take off drive shaft, a housing and an oil seal assembly,
the driving device drives the power output transmission shaft to rotate;
the shell is sleeved on the power output transmission shaft and limits the axial movement of the power output transmission shaft;
one end of the power output transmission shaft is provided with the step hole along the axial direction; the anti-blocking cover is fixedly connected to the power output transmission shaft through the first bolt;
the inner ring of the oil seal assembly is sleeved on the power output transmission shaft, the outer ring of the oil seal assembly abuts against the inner side of the shell, and the oil seal assembly seals the power output transmission shaft and the shell.
3. A power output structure of a tractor according to claim 2, wherein the housing comprises a rear axle housing and a bearing end cover, the rear axle housing and the bearing end cover are respectively sleeved on the power output transmission shaft, and the bearing end cover is fixedly connected with the rear axle housing; the bearing end cover and the rear axle housing respectively limit the axial movement of the power output transmission shaft.
4. The power output structure of the tractor according to claim 3, wherein the oil seal assembly comprises an oil seal and a check ring, inner rings of the oil seal and the check ring are respectively sleeved on the power output transmission shaft, and outer rings of the oil seal and the check ring are respectively abutted to the inner sides of the bearing end covers.
5. A power take-off structure for a tractor as defined by claim 3, wherein the drive unit is a gear transmission unit including a driving gear and a driven gear engaged with each other, and the driven gear is fixedly fitted on the power take-off transmission shaft.
6. A tractor power take off structure as claimed in claim 5, wherein the power take off drive shaft abuts on the rear axle housing through a first bearing; the power output transmission shaft is abutted against the bearing end cover through a second bearing; the first bearing and the second bearing are respectively positioned at two sides of the driven gear; a first bearing retainer ring is arranged between the first bearing and the driven gear; and a second bearing retainer ring is arranged between the second bearing and the driven gear.
7. The power output structure of the tractor according to claim 6, further comprising a lock nut, wherein the lock nut is in threaded connection with the power output transmission shaft and abuts against one side of the first bearing, which is far away from the first bearing retainer ring.
8. A power output structure of a tractor according to any one of claims 5 to 7, wherein the driving gear is a driving duplicate gear, the driven gear includes a meshing sleeve, a meshing tooth holder, a low-gear driven gear and a high-gear driven gear, the driving duplicate gear is respectively meshed with the low-gear driven gear and the high-gear driven gear, the low-gear driven gear and the high-gear driven gear are respectively rotatably sleeved on the power output transmission shaft, the meshing tooth holder is arranged between the low-gear driven gear and the high-gear driven gear, the meshing tooth holder is fixedly sleeved on the power output transmission shaft, the meshing sleeve is sleeved outside the meshing tooth holder and meshed with the meshing tooth holder, and the meshing sleeve can axially slide on the meshing tooth holder;
when the meshing sleeve slides to a first position, the meshing tooth holder is connected with the low-gear driven gear through the meshing sleeve, and then the low-gear driven gear drives the meshing tooth holder to rotate; when the meshing sleeve slides to the second position, the meshing tooth holder is connected with the high-grade driven gear through the meshing sleeve, and then the high-grade driven gear drives the meshing tooth holder to rotate.
9. A power output structure of a tractor according to any one of claims 1 to 7, further comprising a spring collar disposed between the other side of the shoulder projection and the anti-blocking cover, and an outer race of the spring collar abuts against one end of the power output transmission mechanism.
10. A tractor comprising a tractor power take off arrangement as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922054451.4U CN210920039U (en) | 2019-11-25 | 2019-11-25 | Tractor power take off structure and tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922054451.4U CN210920039U (en) | 2019-11-25 | 2019-11-25 | Tractor power take off structure and tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210920039U true CN210920039U (en) | 2020-07-03 |
Family
ID=71352564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922054451.4U Active CN210920039U (en) | 2019-11-25 | 2019-11-25 | Tractor power take off structure and tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210920039U (en) |
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2019
- 2019-11-25 CN CN201922054451.4U patent/CN210920039U/en active Active
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