CN212804155U

CN212804155U - Power takeoff with inserted helical gear transmission

Info

Publication number: CN212804155U
Application number: CN202021566456.1U
Authority: CN
Inventors: 王巧扣
Original assignee: Zhejiang Baishi Ruipawa Drive Co ltd
Current assignee: Zhejiang Baishi Ruipawa Drive Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-03-26
Anticipated expiration: 2030-07-31

Abstract

A power take-off with a helical gearing comprises a housing, an input device arranged in the housing, an output device arranged in the housing, and a drive device arranged in the housing. The input device comprises a fixed shaft penetrating through the shell, an input gear sleeved on the fixed shaft and an intermediate transmission structure. The intermediate transmission structure comprises a helical tooth transmission gear meshed with the input gear, an annular sleeve connected to one side of the helical tooth transmission gear, and an annular transition part arranged between the helical tooth transmission gear and the annular sleeve, and the helical tooth transmission gear, the annular sleeve and the annular transition part are of an integrated structure. This driven power takeoff of area skewed tooth meshing overlap ratio is big, the effectual noise that produces that has reduced transmission in-process, adopts the middle transmission structure of integral type, makes the power takeoff during operation structure reliable, and the separation and reunion is steady, and the structure is compacter.

Description

Power takeoff with inserted helical gear transmission

Technical Field

The utility model belongs to the technical field of machinery, especially a driven power takeoff is inserted to area skewed tooth.

Background

The PTO, an acronym of Power Take Off, is one or more sets of speed change gears, also called Power Take-Off, which is generally composed of a gear box, a clutch, and a controller, and is connected with a low-gear or an auxiliary box output shaft of a gearbox to output Power to an external working device.

The manual gearbox that keeps off is adopted to domestic gearbox conventionality, and when repacking special watering lorry, the vehicle need often switch the gear, and drive gear and transmission ring cover are detachable connection structure between in the power takeoff of conventional separation tooth cover formula, and its structural strength is low, and poor stability easily appears beating the tooth and assaults the abnormal sound when shifting, leads to the problem that the overhead gage was hung even.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a take power takeoff of skewed tooth transmission is inserted to the area to solve above-mentioned problem.

A power take-off with a helical gearing comprises a housing, an input device arranged in the housing, an output device arranged in the housing, and a drive device arranged in the housing. The input device comprises a fixed shaft penetrating through the shell, an input gear sleeved on the fixed shaft and an intermediate transmission structure. The intermediate transmission structure comprises a helical tooth transmission gear meshed with the input gear, an annular sleeve connected to one side of the helical tooth transmission gear, and an annular transition part arranged between the helical tooth transmission gear and the annular sleeve, and the helical tooth transmission gear, the annular sleeve and the annular transition part are of an integrated structure. The output device comprises an output shaft penetrating through the intermediate transmission structure, an annular convex part which is arranged on the axial outer side of the output shaft and corresponds to the annular sleeve, an intermediate bearing arranged between the output shaft and the helical gear transmission gear, and a friction plate combination arranged between the annular sleeve and the annular convex part.

Further, the driving device comprises a driving shell embedded in the shell, a driving piston arranged in the driving shell and sleeved outside the output shaft, an air inlet chamber arranged among the driving shell, the driving piston and the output shaft, and a return spring arranged between the annular convex part and the driving piston, wherein one end of the driving piston abuts against the friction plate combination.

Furthermore, the friction plate combination comprises a plurality of inner friction plates which are embedded on the inner wall of the annular sleeve at intervals, and a plurality of outer friction plates which are embedded on the outer wall of the annular convex part at intervals, and the inner friction plates and the outer friction plates are sequentially arranged in a staggered manner.

Furthermore, an annular limiting sheet is arranged on the output shaft, one end of the annular transition part is abutted against the annular convex part, and the helical tooth transmission gear at the other end is abutted against the annular limiting sheet.

Further, the housing includes a housing, a mounting chamber in the housing, an inlet port disposed on an outer wall of the housing, and an outlet port disposed at an end of the housing.

Furthermore, two output bearings embedded in the shell are respectively sleeved at two ends of the output shaft.

Furthermore, one end of the output shaft, which is far away from the input device, is connected with an output matching part.

Furthermore, an input bearing arranged on the inner side of the input gear is sleeved on the outer side of the fixed shaft.

Further, an air inlet is arranged on the shell.

Further, an air inlet pipeline communicated with the air inlet and the air inlet chamber is arranged on the inner side of the output shaft.

Compared with the prior art, the power takeoff with the inserted helical tooth transmission provided by the utility model has large meshing contact ratio through the transmission form of the helical gear transmission gear, thereby effectively reducing the noise generated in the transmission process; the integrated intermediate transmission structure replaces the original separation transmission structure, so that the power takeoff has a reliable structure and is stable in clutch during working; an annular transition part structure is additionally arranged between the helical gear transmission gear and the annular sleeve, and the helical gear transmission gear and the annular sleeve are matched with a gear shaping processing technology, so that the space between the helical gear transmission gear and the annular sleeve is reduced, and the structure is more compact.

Drawings

Fig. 1 is a schematic structural view of a power takeoff with helical gear insertion transmission provided by the present invention.

Detailed Description

Specific examples of the present invention will be described in further detail below. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.

Please refer to fig. 1, which is a schematic structural diagram of a power takeoff with helical gearing according to the present invention. A power take-off with a helical gearing comprises a housing 10, an input device 20 arranged in the housing 10, an output device 30 arranged in the housing 10, and a drive device 40 arranged in the housing 10. It is understood that the power takeoff with helical gearing may also include other functional components and specific structures, such as air inlet sealing structures, mounting structures, etc., which are well known to those skilled in the art, and therefore, will not be described in detail herein.

The housing 10 includes a housing 11, a mounting chamber 12 in the housing 11, an inlet 13 disposed on an outer wall of the housing 11, and an outlet 14 disposed at one end of the housing 11.

The input device 20 includes a fixed shaft 21 penetrating the housing 10, an input gear 22 sleeved on the fixed shaft 21, and an intermediate transmission structure 23. The input device 20 is arranged at the input port 13, one side of the input gear 22 protrudes out of the input port 13, the input gear 22 transmits power in the gearbox to the power takeoff, and the input gear 22 transmits power to the intermediate transmission structure 23. An input bearing 24 disposed inside the input gear 22 is sleeved outside the fixed shaft 21. The input bearing 24 ensures relative rotation between the input gear 22 and the stationary shaft 21, while allowing axial positioning of the input gear 22 to prevent the input gear 22 from contacting the housing 10.

The intermediate transmission structure 23 includes a helical transmission gear 231 engaged with the input gear 22, an annular sleeve 232 connected to one side of the helical transmission gear 231, and an annular transition portion 233 disposed between the helical transmission gear 231 and the annular sleeve 232, wherein the helical transmission gear 231, the annular sleeve 232, and the annular transition portion 233 are of an integrated structure. Through the transmission form of the helical tooth transmission gear 231, the meshing contact ratio is high, and the noise generated in the transmission process is effectively reduced; the integrated intermediate transmission structure 23 replaces the original separation transmission structure, so that the power takeoff has a reliable structure and is stable in clutch during working; an annular transition part 233 structure is additionally arranged between the helical gear transmission gear 231 and the annular sleeve 232, and the helical gear transmission gear 231 and the annular sleeve 232 are reduced in space by matching with a gear shaping processing technology, so that the structure is more compact.

The output device 30 includes an output shaft 31 passing through the intermediate transmission structure 23, an annular protrusion 32 disposed axially outward of the output shaft 31 and corresponding to the annular sleeve 232, an intermediate bearing 33 disposed between the output shaft 31 and the helical gear 231, and a friction plate assembly 34 disposed between the annular sleeve 232 and the annular protrusion 32. The friction plate assembly 34 comprises a plurality of inner friction plates 341 embedded on the inner wall of the annular sleeve 232 at intervals, and a plurality of outer friction plates 342 embedded on the outer wall of the annular convex part 32 at intervals, wherein the inner friction plates 341 and the outer friction plates 342 are sequentially arranged in a staggered manner. The driving device 40 presses the friction plate assembly 34 to control the power transmission between the intermediate transmission structure 23 and the output device 30 to be turned on or off, and the clutch mode is conventional in the art and therefore will not be described herein. An annular limiting sheet 311 is arranged on the output shaft 31, one end of the annular transition part 233 abuts against the annular convex part 32, and the helical gear 231 at the other end abuts against the annular limiting sheet 311. Through the cooperation of the annular limiting piece 311 and the annular convex portion 32, the intermediate transmission structure 23 can be stably sleeved on the output shaft 31, and the axial movement of the intermediate transmission structure 23 is avoided. An output matching part 312 is connected to an end of the output shaft 31 away from the input device 20, and the power transmitted to the output shaft 31 can be output to the outside through the output matching part 312. Two output bearings 35 embedded in the housing 10 are respectively sleeved at two ends of the output shaft 31, the output bearings 35 can fix the position of the output shaft 31 in the housing 10, and the output shaft 31 can be ensured to rotate smoothly.

The driving device 40 includes a driving housing 41 embedded in the outer shell 10, a driving piston 42 disposed in the driving housing 41 and sleeved outside the output shaft 31, an air inlet chamber 43 disposed between the driving housing 41, the driving piston 42 and the output shaft 31, and a return spring 44 disposed between the annular protrusion 32 and the driving piston 42, wherein one end of the driving piston 42 abuts against the friction plate assembly 34. An air inlet 431 is arranged at one end, away from the output matching part 312, of the outer shell 10, an air inlet pipeline 432 communicated with the air inlet 431 and the air inlet chamber 43 is arranged on the inner side of the output shaft 31, high-pressure gas enters the air inlet chamber 43 sequentially through the air inlet 431 and the air inlet pipeline 432, the push rod drives the piston 42 to apply force on the friction plate assembly 34, the friction plate assembly 34 is in a stressed clamping state, namely a transmission state, when air is cut, the return spring 44 applies force on the driving piston 42 to return to the original position, and the friction plate assembly 34 is in a loose state, namely a disconnection state. It is conceivable that oil pressure may be used as a power source of the driving device 40 instead of high-pressure gas.

The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention, and any modification, equivalent replacement or improvement within the spirit of the present invention is encompassed by the claims of the present invention.

Claims

1. The utility model provides a driven power takeoff of skewed tooth is inserted in area which characterized in that: the power takeoff with inserted helical gear transmission comprises a shell, an input device arranged in the shell, an output device arranged in the shell and a driving device arranged in the shell, wherein the input device comprises a fixed shaft penetrating in the shell, an input gear sleeved on the fixed shaft and an intermediate transmission structure, the intermediate transmission structure comprises a helical gear transmission gear meshed with the input gear, an annular sleeve connected to one side of the helical gear transmission gear and an annular transition part arranged between the helical gear transmission gear and the annular sleeve, the helical gear transmission gear, the annular sleeve and the annular transition part are of an integral structure, the output device comprises an output shaft penetrating through the intermediate transmission structure and an annular convex part arranged on the axial outer side of the output shaft and corresponding to the annular sleeve, an intermediate bearing disposed between the output shaft and the helical gearing, and a friction plate assembly disposed between the annular sleeve and the annular projection.

2. The power takeoff with skewed tooth drive of claim 1, wherein: the driving device comprises a driving shell embedded in the shell, a driving piston arranged in the driving shell and sleeved outside the output shaft, an air inlet chamber arranged among the driving shell, the driving piston and the output shaft, and a return spring arranged between the annular convex part and the driving piston, wherein one end of the driving piston is abutted against the friction plate combination.

3. The power takeoff with skewed tooth drive of claim 1, wherein: the friction plate combination comprises a plurality of inner friction plates which are embedded on the inner wall of the annular sleeve at intervals, and a plurality of outer friction plates which are embedded on the outer wall of the annular convex part at intervals, and the inner friction plates and the outer friction plates are sequentially arranged in a staggered mode.

4. The power takeoff with skewed tooth drive of claim 1, wherein: an annular limiting sheet is arranged on the output shaft, one end of the annular transition portion is abutted against the annular convex portion, and the helical tooth transmission gear at the other end is abutted against the annular limiting sheet.

5. The power takeoff with skewed tooth drive of claim 1, wherein: the housing includes a housing, a mounting chamber in the housing, an inlet port disposed on an outer wall of the housing, and an outlet port disposed at an end of the housing.

6. The power takeoff with skewed tooth drive of claim 1, wherein: two output bearings embedded in the shell are respectively sleeved at two ends of the output shaft.

7. The power takeoff with skewed tooth drive of claim 5, wherein: one end of the output shaft, which is far away from the input device, is connected with an output matching part.

8. The power takeoff with skewed tooth drive of claim 1, wherein: and an input bearing arranged on the inner side of the input gear is sleeved on the outer side of the fixed shaft.

9. The power takeoff with skewed tooth drive of claim 2, wherein: an air inlet is arranged on the shell.

10. The power takeoff with skewed tooth drive of claim 9, wherein: and an air inlet pipeline communicated with the air inlet and the air inlet chamber is arranged on the inner side of the output shaft.