CN220581669U

CN220581669U - Power takeoff

Info

Publication number: CN220581669U
Application number: CN202321918595.XU
Authority: CN
Inventors: 邓雪梅
Original assignee: JIANGSU NANFANG ELECTROMECHANICAL CO LTD
Current assignee: JIANGSU NANFANG ELECTROMECHANICAL CO LTD
Priority date: 2023-07-20
Filing date: 2023-07-20
Publication date: 2024-03-12
Anticipated expiration: 2033-07-20

Abstract

The utility model discloses a power takeoff, which comprises a shell, an input shaft and an output shaft, wherein the input shaft and the output shaft are rotatably arranged on the inner side of the shell, a first gear is arranged on the outer side of the input shaft, a second gear is arranged on the outer side of the output shaft, the first gear is adjacent to and opposite to the second gear, a movable spline housing is arranged on the outer side of the second gear, a shifting fork seat is arranged on the side part of the shell, a sliding block is arranged on the inner side of the shifting fork seat in a sliding manner, a shifting fork is arranged at the end part of the sliding block, a spring is sleeved on the outer side of the shifting fork, the end part of the shifting fork is in butt joint with the lower part of the spline housing, and an air inlet is formed in the side part of the shifting fork seat. According to the utility model, air is introduced into an air inlet to push a sliding block and a shifting fork to move and squeeze a spring, the shifting fork moves to drive a spline housing to move, and two sections of the inner side of the spline housing are respectively meshed with a first gear and a second gear; after stopping the air feed, each structure resets under the effect of spring, and the spline housing meshes in the outside of second gear again only.

Description

Power takeoff

Technical Field

The utility model relates to the technical field of power takeoff devices, in particular to a power takeoff device.

Background

The Power Take-Off, called Power Take-Off for short, is one or several sets of speed changing gears, called Power Take-Off, and is formed by combining gearbox, clutch and controller, and is connected with the output shaft of low-grade gear or auxiliary box of gearbox to output Power to external working equipment, such as lifting pump, etc.. The main function of the vehicle is that power is obtained from a vehicle chassis system, then the power is transmitted to a vehicle oil pump system through a transmission shaft by self conversion, and then the equipment on a special vehicle is controlled to complete the special functions.

The power takeoff is widely used on special automobiles, such as mixer trucks, off-road vehicles, lifting vehicles and the like. The power take-off has different forms and classifications, such as side power take-off, one-axis, two-axis, three-axis, sub-box, single-operation double-output, double-operation double-output, etc. The power take-off device can take off force from the front end crank pulley, the middle shaft of the speed changer or the reverse gear shaft of the engine, and the like, and can also adopt a pneumatic, hydraulic or electric control device.

Most of the traditional power take-off devices adopt mechanical or hydraulic or mechanical electric power take-off devices, hydraulic transmission inevitably has leakage due to relative motion surfaces, meanwhile, oil is not absolutely incompressible, edge loss, local loss and leakage loss exist in the oil flowing process, the transmission efficiency is lower, the hydraulic transmission is unsuitable for long-distance transmission, certain difficulties are caused when the hydraulic transmission is adopted under the conditions of high temperature and low temperature, the requirements on oil leakage prevention and certain performance are met, the hydraulic element has high manufacturing precision, certain difficulties are caused for use and maintenance, faults are difficult to check, especially in factories with less popularization of hydraulic technology, and the contradiction often hinders the further popularization and application of the hydraulic technology.

Disclosure of Invention

The present utility model is directed to a power take-off to solve the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a power takeoff, includes the casing, rotate install in the inboard input shaft and the output shaft of casing, the outside of input shaft is provided with first gear, the outside of output shaft is provided with the second gear, first gear with the second gear is adjacent and set up relatively, the outside of second gear is provided with movable spline housing, the shifting fork seat is installed to the lateral part of casing, the slider is installed in the inner sliding of shifting fork seat, the shift fork is installed to the tip of slider, the outside cover of shift fork is equipped with the spring, the tip of shift fork with the lower part butt joint of spline housing, the lateral part of shifting fork seat is provided with the air inlet; the air inlet is used for introducing air to push the sliding block and the shifting fork to move and squeeze the spring, the shifting fork is used for moving to drive the spline housing to move, and two sections of the inner side of the spline housing are respectively meshed with the first gear and the second gear; after stopping the air feed, each structure resets under the effect of spring, the spline housing meshes again only in the outside of second gear.

In one embodiment of the utility model, the side of the housing is fitted with a roller bearing and the input shaft is fitted to the inner race of the roller bearing.

In one embodiment of the utility model, an extension part is arranged at the end part of the output shaft, the extension part extends into the inner side of the input shaft, a needle bearing is arranged on the outer side of the extension part, and an outer ring of the needle bearing is connected with the inner part of the input shaft.

In one embodiment of the utility model, the interior of the input shaft is provided with grooves that cooperate with the outer extensions and the needle bearings.

In one embodiment of the present utility model, the first gear and the second gear are identical in specification.

In one embodiment of the utility model, a notch groove matched with the shifting fork is formed in the periphery of the spline housing, and tooth grooves matched with the first gear and the second gear are formed in the inner side of the spline housing.

In one embodiment of the utility model, a sealing ring is arranged between the outer wall of the sliding block and the inner wall of the shifting fork seat, and a groove for accommodating the sealing ring is arranged on the periphery of the sliding block.

In summary, the beneficial effects of the utility model are as follows due to the adoption of the technology:

according to the utility model, air is introduced into the air inlet to push the sliding block and the shifting fork to move and squeeze the spring, the shifting fork moves to drive the spline housing to move, and two sections of the inner side of the spline housing are respectively meshed with the first gear and the second gear; after stopping supplying air, resetting each structure under the action of the spring, and re-engaging the spline housing on the outer side of the second gear; compared with hydraulic transmission, pneumatic transmission has the advantages of quick action, quick response, simple maintenance, clean working medium, no medium deterioration and the like, low cost, automatic overload protection, reduction of pollution sources and noise reduction due to reduction of used energy varieties and optimized performance of the pneumatic transmission, and better guarantee for environmental protection work of factories.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the earth 1 at A-A according to the present utility model;

FIG. 3 is a schematic view of a fork seat portion of the present utility model;

FIG. 4 is a schematic view of a slider portion of the present utility model;

FIG. 5 is a schematic view of a fork part structure according to the present utility model;

FIG. 6 is a schematic view of a portion of the spline housing of the present utility model;

fig. 7 is a schematic view of the structure of the input shaft portion of the present utility model.

In the figure: 1. a housing; 2. an input shaft; 3. an output shaft; 4. a first gear; 5. a second gear; 6. a spline housing; 7. a fork base; 8. a slide block; 9. a shifting fork; 10. a spring; 11. an air inlet; 12. a roller bearing; 13. an extension part; 14. needle roller bearings; 15. a groove; 16. a notch groove; 17. tooth slots; 18. a seal ring; 19. a channel.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art based on the specification.

Referring to fig. 1-7, the present utility model provides a power takeoff, which includes a housing 1, an input shaft 2 and an output shaft 3 rotatably mounted on the inner side of the housing 1, one end of the output shaft 3 is connected with a transmission component such as a gear, an impeller, etc., a first gear 4 is disposed on the outer side of the input shaft 2, a second gear 5 is disposed on the outer side of the output shaft 3, the first gear 4 is adjacent to and opposite to the second gear 5, the first gear 4 and the second gear 5 have the same specification, a movable spline housing 6 is disposed on the outer side of the second gear 5, a fork seat 7 is mounted on the side of the housing 1, a slider 8 is slidably mounted on the inner side of the fork seat 7, a fork 9 is mounted on the end of the slider 8, a spring 10 is sleeved on the outer side of the fork 9, the end of the fork 9 is abutted to the lower portion of the spline housing 6, and an air inlet 11 is disposed on the side of the fork seat 7.

When the power transmission device is particularly used, the air inlet 11 is filled with air to push the sliding block 8 and the shifting fork 9 to move and squeeze the spring 10, the shifting fork 9 moves to drive the spline housing 6 to move, and two sections on the inner side of the spline housing 6 are respectively meshed with the first gear 4 and the second gear 5, so that power transmission can be realized; after stopping the air supply, each structure is reset under the action of the spring 10, and the spline housing 6 is meshed with the outer side of the second gear 5 again, so that the power transmission can be closed. Compared with hydraulic transmission, pneumatic transmission has the advantages of quick action, quick response, simple maintenance, clean working medium, no medium deterioration and the like, low cost, automatic overload protection, reduction of pollution sources and noise reduction due to reduction of used energy varieties and optimized performance of the pneumatic transmission, and better guarantee for environmental protection work of factories.

Referring to fig. 1, 2 and 7, in order to facilitate the installation of the input shaft 2, a roller bearing 12 is installed at a side portion of the housing 1, the input shaft 2 is installed at an inner ring of the roller bearing 12, an extension portion 13 is provided at an end portion of the output shaft 3, the extension portion 13 extends into an inner side of the input shaft 2, a needle bearing 14 is provided at an outer side of the extension portion 13, an outer ring of the needle bearing 14 is connected with an inner portion of the input shaft 2 so that centers of the input shaft 2 and the output shaft 3 are coaxially arranged, and stable support of the output shaft 3 itself is ensured, and of course, it should be understood that a groove 15 matched with the extension portion 13 and the needle bearing 14 is provided in the inner portion of the input shaft 2.

Referring to fig. 2 and 6, a notch 16 matching with the shift fork 9 is provided on the periphery of the spline housing 6, and a rotatable tooth slot 17 matching with the first gear 4 and the second gear 5 is provided on the inner side of the spline housing 6, so that transmission is not affected when the spline housing 6 connects the first gear 4 and the second gear 5.

Referring to fig. 2 and 4, of course, in order to prevent gas leakage, a sealing ring 18 is provided between an outer wall of the slider 8 and an inner wall of the fork seat 7, and a groove 19 accommodating the sealing ring 18 is provided at an outer circumference of the slider 8.

Working principle: when the power transmission device is used, the air inlet 11 is filled with air to push the sliding block 8 and the shifting fork 9 to move and squeeze the spring 10, the shifting fork 9 moves to drive the spline housing 6 to move, and the two sections on the inner side of the spline housing 6 are respectively meshed with the first gear 4 and the second gear 5, so that power transmission can be realized; after stopping the air supply, each structure is reset under the action of the spring 10, and the spline housing 6 is meshed with the outer side of the second gear 5 again, so that the power transmission can be closed. Compared with hydraulic transmission, pneumatic transmission has the advantages of quick action, quick response, simple maintenance, clean working medium, no medium deterioration and the like, low cost, automatic overload protection, reduction of pollution sources and noise reduction due to reduction of used energy varieties and optimized performance of the pneumatic transmission, and better guarantee for environmental protection work of factories.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Claims

1. The utility model provides a power takeoff, includes casing (1), rotate install in input shaft (2) and output shaft (3) of casing (1) inboard, the outside of input shaft (2) is provided with first gear (4), the outside of output shaft (3) is provided with second gear (5), first gear (4) with second gear (5) are adjacent and relative setting, a serial communication port, the outside of second gear (5) is provided with mobilizable spline housing (6), fork seat (7) are installed to the lateral part of casing (1), slider (8) are installed to the inside of fork seat (7), shift fork (9) are installed to the tip of slider (8), the outside cover of shift fork (9) is equipped with spring (10), the tip of shift fork (9) with the lower part butt joint of spline housing (6), the lateral part of fork seat (7) is provided with air inlet (11); the air inlet (11) is used for introducing air to push the sliding block (8) and the shifting fork (9) to move and squeeze the spring (10), the shifting fork (9) is used for moving to drive the spline housing (6) to move, and two sections of the inner side of the spline housing (6) are respectively meshed with the first gear (4) and the second gear (5); after stopping the air supply, each structure is reset under the action of the spring (10), and the spline housing (6) is meshed with the outer side of the second gear (5) again.

2. A power take-off as claimed in claim 1, wherein: a roller bearing (12) is mounted on the side of the housing (1), and the input shaft (2) is mounted on the inner ring of the roller bearing (12).

3. A power take-off as claimed in claim 1 or claim 2, wherein: the end of the output shaft (3) is provided with an extension part (13), the extension part (13) stretches into the inner side of the input shaft (2), the outer side of the extension part (13) is provided with a needle bearing (14), and the outer ring of the needle bearing (14) is connected with the inner side of the input shaft (2).

4. A power take-off as claimed in claim 3, wherein: a groove (15) matched with the extension part (13) and the needle bearing (14) is arranged in the input shaft (2).

5. A power take-off as claimed in claim 1, wherein: the first gear (4) and the second gear (5) have the same specification.

6. A power take-off as claimed in claim 5, wherein: the periphery of the spline housing (6) is provided with a notch groove (16) matched with the shifting fork (9), and the inner side of the spline housing (6) is provided with a rotatable tooth groove (17) matched with the first gear (4) and the second gear (5).

7. A power take-off as claimed in claim 1, wherein: a sealing ring (18) is arranged between the outer wall of the sliding block (8) and the inner wall of the shifting fork seat (7), and a groove (19) for accommodating the sealing ring (18) is formed in the periphery of the sliding block (8).