CN220956687U - A gearbox power take-off combination - Google Patents

Abstract

The utility model discloses a gearbox power take-off combination, which belongs to the technical field of gearboxes, and includes a gearbox housing, wherein the first installation area and the second installation area for installing the power take-off are respectively provided on both sides of the gearbox housing; the upper and lower parts of the first installation area and the second installation area are provided with oil outlet holes; the first installation area is provided with a first power take-off, and the second installation area is provided with a second power take-off; the outer shells of the first power take-off and the second power take-off are provided with two universal oil holes connected with the inside thereof, and the two universal oil holes on the first power take-off and the second power take-off correspond to the oil inlet hole and the oil outlet hole on the first installation area and the second installation area, respectively; the first power take-off is rotated 180° in a plane to become the second power take-off. The first power take-off is flipped at a certain angle to obtain the second power take-off, and the two universal oil holes are respectively corresponding to the oil inlet hole and the oil outlet hole, thereby realizing the universality of the power take-off and reducing the manufacturing cost.

Description

A gearbox power take-off combination

Technical Field

The utility model belongs to the technical field of gearboxes, in particular to a gearbox power take-off combination.

Background technique

The transmission, also known as the gearbox, is a mechanism used to change the speed and torque from the engine. It can change the transmission ratio of the output shaft and the input shaft in a fixed or divided manner. The transmission consists of a speed transmission mechanism and a control mechanism. Some cars also have a power output mechanism. Most transmission mechanisms use ordinary gear transmissions, and some use planetary gear transmissions. Ordinary gear transmission speed change mechanisms generally use sliding gears and synchronizers.

A power take-off is a group or more sets of speed gears, also known as a power output device. It is generally composed of a gearbox, a clutch, and a controller. It is connected to the low-speed gear of the gearbox or the output shaft of the auxiliary box to output power to an external working device, such as a lifting pump.

As the functions and uses of special-purpose vehicles become more and more extensive, the use of power take-offs is also increasing. In order to reduce manufacturing and maintenance costs, higher requirements are placed on the versatility of power take-offs. At the same time, as the load of special-purpose vehicles continues to increase, the requirements for the load-bearing capacity and service life of power take-offs are also becoming more stringent.

Utility Model Content

In order to solve the problem of high manufacturing cost and poor versatility in developing power take-offs of different specifications, the utility model provides a universally adaptable gearbox power take-off combination.

The utility model is realized by the following technical solutions:

A gearbox power take-off assembly, comprising a gearbox housing, wherein two sides of the gearbox housing are respectively provided with a first mounting area and a second mounting area for mounting a power take-off; the upper parts of the first mounting area and the second mounting area are both provided with an oil inlet hole, and the lower parts of the first mounting area and the second mounting area are both provided with an oil outlet hole;

A first power take-off is installed in the first installation area, and a second power take-off is installed in the second installation area; two universal oil holes communicating with the interior of the first power take-off and the second power take-off are provided on the housings of the first power take-off and the second power take-off, and the two universal oil holes on the first power take-off and the second power take-off correspond to the oil inlet hole and the oil outlet hole on the first installation area and the second installation area, respectively;

The first power take-off is rotated 180° in a plane to become the second power take-off.

After the first power take-off is flipped at a certain angle, the second power take-off is obtained, and the two power take-offs can be installed on the gearbox housing, and the two universal oil holes can be matched with the oil inlet hole and the oil outlet hole respectively, thereby realizing the universality of the power take-off and reducing the manufacturing cost.

A further improvement of the utility model is that the outer shell surface of the first power take-off is provided with a curved chamfer, which improves the external force strength and effectively reduces the risk of injury to the assembler caused by the edges and corners of the outer shell.

A further improvement of the utility model is that the inner shell surface of the first power take-off is provided with a curved chamfer to improve the force-bearing strength of the structure.

A further improvement of the utility model is that the first power take-off is provided with a fixing bolt that can penetrate the gearbox housing. The fixing bolt penetrates the gearbox housing and is then tightened with a fastening nut, thereby effectively improving assembly efficiency.

A further improvement of the utility model is that an output gear shaft is rotatably provided at the inner lower part of the first power take-off, and one side of the output gear shaft is connected to a flange that penetrates and extends to the outside of the first power take-off; a driving gear is meshed above the output gear shaft, and the side of the driving gear away from the flange is connected to an input shaft that penetrates the first power take-off. The input shaft drives the flange to rotate through the driving gear and the output gear shaft to complete the function of power output of the power take-off.

A further improvement of the utility model is that the output gear shaft and the driving gear are both installed in the first power take-off through cylindrical roller bearings, and the cylindrical roller bearings are used to improve the smoothness of the rotation of the output gear shaft and the driving gear in the first power take-off.

A further improvement of the utility model is that a sliding sleeve is further provided in the first power take-off, and the sliding sleeve is arranged on the outer wall of the driving gear and the input shaft through a spline to slide back and forth; the sliding sleeve is connected to an elastic cylindrical pin through a shift fork, and the end of the elastic cylindrical pin away from the shift fork is sleeved with a compression spring that contacts the inner wall of the first power take-off, and in the initial state, the shift fork links the sliding sleeve to mesh with the driving gear. Under the action of the compression spring, the shift fork pushes the sliding sleeve to mesh with the driving gear.

A further improvement of the utility model is that the first power take-off is provided with a cylinder hole corresponding to the end of the elastic cylindrical pin away from the shift fork. Air intake through the cylinder hole pushes the elastic cylindrical pin to squeeze the compression spring, so that the sliding sleeve is meshed and linked with the input shaft and the driving gear at the same time.

A further improvement of the utility model is that the elastic cylindrical pin contacts the inner wall of the first power take-off through a sealing ring, which helps to improve the sealing performance between the elastic cylindrical pin and the inner wall of the power take-off.

A further improvement of the utility model is that the first power take-off comprises a front shell and a rear shell, the front shell and the rear shell are assembled together by fasteners, and a sealing ring is provided between the front shell and the rear shell, which helps to improve the assembly convenience of the power take-off.

It can be seen from the above technical scheme that the beneficial effect of the utility model is that the second power take-off is obtained by flipping the first power take-off at a certain angle, and the two power take-offs can be installed on the gearbox housing, and the two universal oil holes are respectively matched with the oil inlet hole and the oil outlet hole, thereby realizing the universality of the power take-off and reducing the manufacturing cost.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the outer structure of a gearbox housing according to a specific embodiment of the present invention.

FIG. 2 is a schematic diagram of a first structure of the inner side of a gearbox housing according to a specific embodiment of the present utility model.

FIG3 is a schematic diagram of a second structure of the inner side of a gearbox housing according to a specific embodiment of the present utility model.

FIG. 4 is a schematic structural diagram of a first power take-off according to a specific implementation manner of the utility model.

FIG. 5 is a schematic structural diagram of a second power take-off according to a specific embodiment of the present utility model.

FIG6 is a schematic cross-sectional view of a power take-off and a gearbox housing assembly according to a specific embodiment of the present invention.

FIG. 7 is a schematic diagram of the internal structure of a power take-off according to a specific embodiment of the present utility model.

In the accompanying drawings: 1. gearbox housing, 11. first installation area, 12. second installation area, 13. oil inlet hole, 14. oil outlet hole, 2. first power take-off, 3. second power take-off, 21. front housing, 22. rear housing, 221. universal oil hole, 222. cylinder hole, 23. output gear shaft, 24. flange, 25. driving gear, 251. cylindrical roller bearing, 26. input shaft, 27. sliding sleeve, 28. shift fork, 29. elastic cylindrical pin, 291. compression spring, 292. sealing ring.

Detailed ways

In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

As shown in Figures 1-7, a gearbox power take-off combination includes a gearbox housing 1, wherein a first mounting area 11 and a second mounting area 12 for mounting the power take-off are respectively provided on both sides of the gearbox housing 1; an oil inlet hole 13 is provided at the upper portion of the first mounting area 11 and the second mounting area 12, and an oil outlet hole 14 is provided at the lower portion of the first mounting area 11 and the second mounting area 12; a first power take-off 2 is installed in the first mounting area 11, and a second power take-off 3 is installed in the second mounting area 12; two general oil holes 221 communicating with the interior of the first power take-off 2 and the second power take-off 3 are provided on the outer shells, and the two general oil holes 221 on the first power take-off 2 and the second power take-off 3 correspond to the oil inlet hole 13 and the oil outlet hole 14 on the first mounting area 11 and the second mounting area 12, respectively; the first power take-off 2 is rotated 180° in a plane to become the second power take-off 3.

The first power take-off 2 is provided with a fixing bolt that can penetrate the gearbox housing 1. After the fixing bolt penetrates the gearbox housing 1, it is locked with a fastening nut, which effectively improves the assembly efficiency.

The first power take-off 2 comprises a front shell 21 and a rear shell 22, which are assembled together by fasteners, and a sealing ring 292 is provided between the front shell 21 and the rear shell 22. This helps to facilitate the assembly of the power take-off.

An output gear shaft 23 is rotatably provided at the inner lower part of the first power take-off 2, and the output gear shaft 23 is installed in the first power take-off 2 through a cylindrical roller bearing 251. The cylindrical roller bearing 251 improves the smoothness of the rotation of the output gear shaft 23 in the first power take-off 2. A flange 24 that penetrates and extends to the outside of the first power take-off 2 is connected to one side of the output gear shaft 23; the flange 24 is provided on the rear housing 22.

A driving gear 25 is meshed above the output gear shaft 23, and the driving gear 25 is installed in the first power take-off 2 through a cylindrical roller bearing 251. The cylindrical roller bearing 251 improves the smoothness of the rotation of the output driving gear 25 in the first power take-off 2. The side of the driving gear 25 away from the flange 24 is connected to an input shaft 26 that penetrates the first power take-off 2. The input shaft 26 drives the flange 24 to rotate through the driving gear 25 and the output gear shaft 23, completing the function of power take-off power output. The input shaft 26 is matched with the external spline of the gearbox countershaft to achieve a combined state. The input shaft 26 is rotatably arranged on the front shell 21.

The first power take-off 2 is also provided with a sleeve 27, which is arranged on the outer wall of the driving gear 25 and the input shaft 26 through a spline to slide back and forth. That is, when the sleeve 27 is combined with the driving gear 25 and the input shaft 26, the first power take-off 2 is in a variable force working state.

The sliding sleeve 27 is connected to an elastic cylindrical pin 29 via a shift fork 28. The end of the elastic cylindrical pin 29 away from the shift fork 28 is sleeved with a compression spring 291 that contacts the inner wall of the first power take-off 2. In the initial state, the shift fork 28 links the sliding sleeve 27 to mesh with the driving gear 25. Under the action of the compression spring 291, the shift fork 28 pushes the sliding sleeve 27 to mesh with the driving gear 25.

The first power take-off 2 is also provided with a cylinder hole 222 corresponding to the end of the elastic cylindrical pin 29 away from the fork 28, and the cylinder hole 222 is provided on the rear housing 22. Air intake through the cylinder hole 222 pushes the elastic cylindrical pin 29 to squeeze the compression spring 291, so that the sliding sleeve 27 is meshed and linked with the input shaft 26 and the driving gear 25 at the same time. The elastic cylindrical pin 29 contacts the inner wall of the first power take-off 2 through the sealing ring 292, which helps to improve the sealing performance between the elastic cylindrical pin 29 and the inner wall of the power take-off.

In summary, when the device is in use, when the power take-off is not working, the sleeve 27 is only engaged with the driving gear 25 through the spline, the input shaft 26 is not connected to the driving gear 25, and the power cannot be transmitted from the input shaft 26 to the driving gear 25.

When the power take-off needs to work, the high-pressure gas passes through the cylinder hole 222 of the rear housing 22, and pushes the fork 28 to move leftward. The fork 28 moves leftward and pushes the sleeve 27 to move leftward. The sleeve 27 engages with the input shaft 26 through the spline. The gearbox countershaft engages with the input shaft 26 through the spline, and the power is transmitted from the countershaft to the input shaft 26. The sleeve 27 engages with the input shaft 26 and the driving gear 25 through the spline. The power is transmitted from the input shaft 26 to the driving gear 25 through the sleeve 27. The driving gear 25 meshes with the output gear shaft 23 through the gear teeth, and the power is transmitted from the driving gear 25 to the output gear shaft 23. Finally, the power is transmitted to the load of the special vehicle by the flange 24, so that the normal operation of the special vehicle is realized.

The same universal oil hole 221 has different functions when it is at different heights. At the same time, in order to reduce the oil temperature of the power take-off when it is working and ensure the lubrication effect, forced lubrication is used to circulate the gear oil. Two universal oil holes 221 are distributed on the end surface of the front shell 21 of the power take-off. The functions of the two universal oil holes 221 can also be determined according to the installation position of the power take-off on the gearbox. The universal oil hole 221 at a higher position is used as the oil inlet, and the universal oil hole 221 at a lower position is used as the oil outlet. When the gearbox is in working state, the gearbox oil pump sprays the gear oil through the oil pipe to the universal oil hole 221 for oil inlet. After the gear oil enters the power take-off, it flows to the universal oil hole 221 for oil outlet through the stirring of the internal components of the power take-off and the action of gravity, and then flows into the gearbox through the universal oil hole 221 for oil outlet. The use of forced lubrication can effectively reduce the working temperature of the power take-off, ensure the lubrication effect of the gear oil, and avoid pitting, burning and other faults caused by the poor lubrication effect of the gear oil due to excessive temperature.

The lubricating oil enters the oil outlet hole 14 of the gearbox housing 1 through the oil pipe. The oil outlet hole 14 of the gearbox housing 1 corresponds to the universal oil hole 221 of the power take-off. The lubricating oil can continuously enter the power take-off by pressurizing the oil pump. After entering the power take-off, the lubricating oil flows downward and flows into the oil inlet hole 13 of the gearbox housing 1 from the universal oil hole 221 of the power take-off below, and then flows into the gearbox, completing a circulation of the lubricating oil. The flow of the lubricating oil can enhance the lubrication effect of each part and take away the heat generated during the operation of the parts, effectively reducing the temperature of the power take-off during operation.

The inner shell surface and the outer shell surface of the first power take-off 2 are provided with curved chamfers. The external force strength is improved, and the risk of injury to the assembly personnel caused by the edges and corners of the shell is effectively reduced. The stress concentration generated during the casting and processing of the shell can be effectively reduced, the possibility of cracking of the power take-off shell under the action of torque can be reduced, the reliability of the power take-off shell during operation can be improved, and the risk of scratches on personnel caused by sharp protrusions during assembly can be reduced.

The utility model describes a gearbox power take-off combination, in which a second power take-off is obtained by flipping a first power take-off at a certain angle, and the two power take-offs can be installed on a gearbox housing, and two universal oil holes are respectively matched with the oil inlet hole and the oil outlet hole, thereby achieving universality of the power take-off and reducing manufacturing costs.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The transmission power takeoff combination comprises a transmission housing (1), and is characterized in that a first installation area (11) and a second installation area (12) for installing the power takeoff are respectively arranged on two sides in the transmission housing (1); the upper parts of the first installation area (11) and the second installation area (12) are respectively provided with an oil inlet (13), and the lower parts of the first installation area (11) and the second installation area (12) are respectively provided with an oil outlet (14);

A first power takeoff (2) is arranged in the first installation area (11), and a second power takeoff (3) is arranged in the second installation area (12); two universal oil holes (221) communicated with the inside of the shells of the first power takeoff (2) and the second power takeoff (3) are formed in the shells of the first power takeoff (2) and the second power takeoff (3), and the two universal oil holes (221) on the first power takeoff (2) and the second power takeoff (3) correspond to the oil inlet holes (13) and the oil outlet holes (14) on the first installation area (11) and the second installation area (12) respectively;

the first power takeoff (2) rotates 180 degrees in the plane to form a second power takeoff (3).

2. A transmission power take-off combination according to claim 1, characterized in that the outer envelope surface of the first power take-off (2) is provided with a curved chamfer.

3. A transmission power take-off combination according to claim 2, characterized in that the inner housing face of the first power take-off (2) is provided with a curved chamfer.

4. A transmission power take-off combination according to claim 1, characterised in that the first power take-off (2) is provided with a fixing bolt which can penetrate the transmission housing (1).

5. A transmission power take-off combination according to any one of claims 1 to 4, characterised in that the inner lower part of the first power take-off (2) is provided with an output gear shaft (23) in rotation, one side of the output gear shaft (23) being connected with a flange (24) extending through and out of the first power take-off (2); the upper part of the output gear shaft (23) is meshed with a driving gear (25), and one side, far away from the flange (24), of the driving gear (25) is connected with an input shaft (26) penetrating through the first power takeoff (2).

6. A transmission power take-off combination according to claim 5, characterised in that the output gear shaft (23) and the driving gear (25) are both mounted in the first power take-off (2) by means of cylindrical roller bearings (251).

7. The transmission power take-off assembly according to claim 5, wherein a sliding sleeve (27) is further arranged in the first power take-off (2), and the sliding sleeve (27) is arranged on the outer walls of the driving gear (25) and the input shaft (26) in a reciprocating sliding manner through a spline; the sliding sleeve (27) is connected with an elastic cylindrical pin (29) through a shifting fork (28), one end, away from the shifting fork (28), of the elastic cylindrical pin (29) is sleeved with a compression spring (291) which is in contact with the inner wall of the first power takeoff (2), and in an initial state, the shifting fork (28) is in linkage with the sliding sleeve (27) to be meshed with the driving gear (25).

8. A transmission power take-off assembly according to claim 7, characterised in that the first power take-off (2) is further provided with cylinder bores (222) corresponding to the ends of the elastic cylindrical pins (29) remote from the fork (28).

9. A transmission power take-off assembly according to claim 8, wherein the resilient cylindrical pin (29) is in contact with the inner wall of the first power take-off (2) via a sealing ring (292).

10. A transmission power take-off combination according to any one of claims 1 to 4, characterised in that the first power take-off (2) comprises a front housing (21) and a rear housing (22), the front housing (21) and the rear housing (22) being assembled together by means of fasteners, and a sealing ring (292) being provided between the front housing (21) and the rear housing (22).