Power takeoff shell with lubricating function and power takeoff

Abstract

The utility model relates to the technical field of gearboxes, in particular to a power takeoff shell with a lubricating function and a power takeoff. The power takeoff shell comprises a power takeoff rear shell and a rear cover plate connected with the power takeoff rear shell; the first oil collecting groove and the oil passing channel are formed in the inner side of the rear shell of the power takeoff, so that lubricating oil splashed by rotation of an input gear shaft in the shell can be captured by the first oil collecting groove through the inner wall of the rear shell of the power takeoff; oil is directionally guided into an input gear shaft rear bearing mounting hole through an oil channel and an oil passing groove formed in a rear cover plate to dynamically lubricate an input gear shaft rear bearing, it is guaranteed that the input gear shaft rear bearing obtains continuous oil supply, dry friction abrasion is reduced, the service life of the power takeoff is prolonged, and the service life of the power takeoff is prolonged. The problem that in the prior art, a power takeoff shaft system is poor in lubricating effect is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox technical field, concretely is a kind of take power device shell and take power device with lubrication function. BACKGROUND

[0002] The take power device is a kind of inside with one or more sets of variable speed gear, connect with the gear or intermediate shaft in gearbox, power output to the mechanical device outside, is widely applied in dump truck, fire engine, cement mixer, refrigeration and other need additional power special vehicle. According to the different position of taking power from transmission, it can be generally divided into taking power in front of transmission, side taking power, bottom taking power and rear taking power, in addition, there is the form of taking power directly from the intermediate shaft of transmission. The main parts inside take power device assembly are: take power device shell, transmission gear, bearing, shift sleeve, fork, fork shaft, piston, flange plate, bolt and gasket etc. Among them, transmission gear is the most core component, the rest components all play the role of supporting its transmission. In engineering application, the fatigue life test verification is needed for the newly developed take power device assembly. According to the test result statistics, the most common failure mode of take power device assembly is gear failure and bearing failure. Among them, the common failure phenomena of gear are: gear surface pitting, gear tooth fracture etc. The common failure of bearing is inner and outer ring or roller pitting, cage fracture, scattered frame etc.

[0003] For the above bearing failure, the service life of take power device can be improved by lubricating the bearing, and the common bearing lubrication methods are oil lubrication and grease lubrication. Among them, oil lubrication is the most common, including oil bath lubrication, oil dripping lubrication, splash lubrication etc. From the comprehensive consideration of lubrication effect and product manufacturing cost, oil bath lubrication is the most suitable lubrication method. But the existing take power device assembly generally includes two parallel shaft systems of input shaft and output shaft, corresponding to four bearings of input and output shaft front and back, which are generally installed inside the take power device shell. For oil bath lubrication, if the bearing is only immersed in the lubricating oil, the lubricating oil has no flowability, and the oil temperature rises too fast, which easily leads to premature failure of bearing, and the lubrication effect is often poor. CONTENT OF THE UTILITY MODEL

[0004] In view of the problem of poor lubrication effect of take power device shaft system in the prior art, the utility model provides a take power device shell and take power device with lubrication function.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

[0006] The utility model provides a take power device shell with lubrication function, which comprises a take power device rear shell and a rear cover plate connected thereto.

[0007] The inner side of the take power device rear shell is provided with a first oil collecting groove, and the first oil collecting groove is connected with an oil passing channel.

[0008] The rear cover plate is provided with an oil passing groove and an input gear shaft rear bearing mounting hole, and the oil passing groove is communicated with the oil passing channel and the input gear shaft rear bearing mounting hole.

[0009] Optionally, the first oil collecting groove is provided with at least two, and each oil collecting groove is provided with an oil passing channel.

[0010] Optionally, the first oil collecting groove is provided with at least two, and each oil collecting groove is provided with an oil passing channel.

[0011] Optionally, the power take-off front shell is further provided with an output shaft front bearing mounting hole and a second oil collecting groove, and the output shaft front bearing mounting hole is communicated with the second oil collecting groove.

[0012] Optionally, the output shaft front bearing mounting hole is provided with an oil passing hole, and the oil passing hole is communicated with the second oil collecting groove.

[0013] Optionally, the oil passing groove is provided with an oil passing channel, and the oil passing channel is communicated with the oil passing groove.

[0014] Optionally, the oil passing groove is provided with an oil passing channel, and the oil passing channel is communicated with the oil passing groove.

[0015] Optionally, the oil passing groove is provided with an oil passing channel, and the oil passing channel is communicated with the oil passing groove.

[0016] Optionally, the oil passing groove is provided with an oil passing channel, and the oil passing channel is communicated with the oil passing groove.

[0017] The utility model further provides a power take-off device comprising the power take-off shell with lubricating function.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model provides a take power device shell with lubricating function includes take power device rear shell body and the rear cover plate connected with it, through setting up first oil collecting groove and oil passage in the take power device rear shell body inside, can make the lubricating oil of input gear shaft rotation splash in the shell inside is captured by first oil collecting groove to the take power device rear shell body inner wall, and through the oil passage and the oil passage of rear cover plate is set up directional introduction to the input gear shaft rear bearing installation hole to the input gear shaft rear bearing carries out dynamic lubrication, ensures that the input gear shaft rear bearing obtains continuous oil supply, reduces dry friction wear, prolongs the service life of take power device, the structure design makes full use of the cavity in the shell as oil storage and transmission space, avoids additional oil tank or oil pump, significantly reduces the overall volume of take power device, adapts compact power assembly layout, the shell structure is simple, the transformation cost is low, the integration degree is high, overcomes the cost of traditional external lubricating system, easy to leak, the pain point such as maintenance is complicated, provides technical basis for the miniaturization and intelligent upgrading of take power device.

[0020] The first oil collecting groove is set to at least two, and one oil passage is set corresponding to each oil collecting groove, the setting of multiple first oil collecting grooves can meet the capture and directional flow of lubricating oil under different installation angle conditions by setting different first oil collecting groove opening directions, and the generality is better and the redundancy fault tolerance is good.

[0021] It also includes a take power device front shell body connected with the take power device rear shell body, the take power device front shell body is provided with an output shaft front bearing installation hole and a second oil collecting groove, the output shaft front bearing installation hole is communicated with the second oil collecting groove, and the same principle is adopted to capture and introduce lubricating oil to the output shaft front bearing in the take power device front shell body, so as to further improve the lubricating effect of the output shaft front bearing.

[0022] The output shaft front bearing installation hole is provided with an oil passage hole, the oil passage hole is communicated with the second oil collecting groove, and the oil passage hole can further ensure the good flowability of lubricating oil, and further guarantee the lubricating effect.

[0023] The included angle between the oil passage groove and the horizontal direction is greater than 0 DEG, which can be suitable for the installation of rear cover plates with different installation angles, so that the oil is smoothly introduced from the outside to the inside of the rear cover plate under the action of gravity, and the input gear shaft rear bearing is fully lubricated.

[0024] The opening of the first oil collecting groove is smaller than the maximum diameter of the groove, which is more conducive to the collection of lubricating oil.

[0025] The opening center line of the first oil collecting groove is consistent with the rotation direction of the input gear shaft in the power take-off housing, and the "downstream funnel" effect is formed by the centrifugal force of the input gear shaft rotation and the inertia of the oil, so that the high-speed oil naturally flows into the oil collecting groove along the rotation track, thereby accurately guiding the splashed lubricating oil into the first oil collecting groove, which can greatly reduce the escape loss caused by the collision and rebound of the oil and the inner wall of the housing, and further improve the collection efficiency of the first oil collecting groove on the lubricating oil.

[0026] The groove width of the oil passing groove is equal to the inner diameter of the oil passing channel, which can effectively avoid the sudden change of the flow passage cross-sectional area, thereby reducing the turbulence generation and local pressure loss when the fluid passes through, and improving the lubricating oil conveying efficiency.

[0027] A power take-off comprising the power take-off housing with lubricating function has high integration, dynamic oil management, high stability and high reliability, long service life and low maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural diagram of the prior power take-off.

[0029] Figure 2 It is a sectional structure diagram of the rear housing of the power take-off of the utility model.

[0030] Figure 3 It is a rear view of the rear housing of the power take-off of the utility model.

[0031] Figure 4 It is a partial three-dimensional structure diagram of the rear housing of the power take-off of the utility model.

[0032] Figure 5 It is a structure diagram of two different installation angle rear cover plates of the utility model; a is a certain rear cover plate structure diagram, and b is an oil passing groove rear cover plate structure diagram with different angle from a.

[0033] Figure 6 It is a rear sectional view of a certain power take-off assembly.

[0034] Figure 7 It is a front housing structure diagram of the power take-off, wherein a is a front housing structure main view of the power take-off, and b is an S-S sectional view of a.

[0035] Wherein, 1 - input shaft; 2 - input shaft bearing; 3 - positioning pin; 4 - transition plate; 5 - first gasket; 6 - power take-off front housing; 7 - needle bearing; 8 - second gasket; 9 - input gear shaft; 10 - power take-off rear housing; 11 - input gear shaft rear bearing; 12 - third gasket; 13 - rear cover plate; 14 - output shaft rear bearing seat; 15 - sealing ring; 16 - flange plate; 17 - screw; 18 - output shaft rear bearing; 19 - oil drain screw plug; 20 - output gear shaft; 21 - output shaft front bearing; 22 - shift fork; 23 - sliding sleeve; 101 - first oil collection groove; 102 - oil passage; 131 - oil passage; 132 - input gear shaft rear bearing mounting hole; 61 - output shaft front bearing mounting hole; 62 - oil passage hole. DETAILED DESCRIPTION

[0036] To make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be a clear and complete description of the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0038] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. As "horizontal" only means that it is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0041] In the description of the embodiments of the present application, it should be explained that, unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The present application will be further described in detail below in combination with specific embodiments, which are an explanation of the present application rather than a limitation.

[0043] Referring to Figure 1 , it is a certain type of power take-off assembly, which comprises an input shaft 1, an input shaft bearing 2, a positioning pin 3, a transition plate 4, a first gasket 5, a power take-off front housing 6, a needle bearing 7, a second gasket 8, an input gear shaft 9, a power take-off rear housing 10, an input gear shaft rear bearing 11, a third gasket 12, a rear cover plate 13, an output shaft rear bearing seat 14, a sealing ring 15, a flange plate 16, a screw 17, an output shaft rear bearing 18, an oil drain screw plug 19, an output gear shaft 20, an output shaft front bearing 21, a yoke 22 and a sliding sleeve 23; the working principle is that the transmission driving torque is transmitted into the power take-off through the input shaft 1, the sliding sleeve 23 is controlled by the yoke 22, and the interruption and combination of the transmission input power and the power take-off power are realized. If the sliding sleeve 23 moves to the left, the input power is transmitted from the input shaft 1 of the power take-off to the input gear shaft 9, and the input gear shaft 9 and the output gear shaft 20 are transmitted to the flange plate 16 through external meshing. The input shaft bearing 2 is installed on the transmission rear cover housing, the front end of the input gear shaft 9 is supported on the needle bearing 7, and the rear end is supported on the input gear shaft rear bearing 11. The front end of the output gear shaft 20 is supported on the output shaft front bearing 21, and the rear end is supported on the output shaft rear bearing 18. The lubrication mode of the bearing of the present power take-off is that the lubricating oil introduced from the inside of the transmission, the meshing gear pair and the front and rear bearings of the output shaft are immersed in the lubricating oil, and the maximum height of the lubricating oil is the lower edge of the inner hole of the power take-off front housing 6. Therefore, it is difficult to lubricate the input shaft rear bearing 11, and the problem of premature failure of the bearing often occurs during fatigue test.

[0044] In view of the difficulty of fully lubricating the input shaft rear bearing 11, the present application discloses a power take-off housing with lubrication function, referring to Figures 2 to 6The front shell 6 of the power take-off device is connected with the rear shell 10 of the power take-off device and the rear cover plate 13 in sequence.

[0045] Referring to Figures 2 to 4 The first oil collecting groove 101 is arranged on the inner side of the rear shell 10 of the power take-off device, and the oil passing channel 102 is connected to the first oil collecting groove 101. Figure 5 The opening center line of the first oil collecting groove 101 is consistent with the rotating direction of the input gear shaft 9 in the shell of the power take-off device.

[0046] Referring to Figure 6 The rear cover plate 13 is provided with the oil passing groove 131 and the input gear shaft rear bearing mounting hole 132, the oil passing groove 131 is communicated with the oil passing channel 102 and the input gear shaft rear bearing mounting hole 132, and the angle between the oil passing groove 131 and the horizontal direction is greater than 0°. Figure 5 The utility model provides two different angle's oil groove 131 setting structure diagram.

[0047] Referring to Figure 7 The front shell 6 of the power take-off device is connected with the rear shell 10 of the power take-off device, the front shell 6 of the power take-off device is provided with the output shaft front bearing mounting hole 61 and the second oil collecting groove, the oil passing hole 62 is formed in the output shaft front bearing mounting hole 61, and the oil passing hole 62 is communicated with the second oil collecting groove.

[0048] The power take-off device has high integration, dynamic oil management, high stability and high reliability, long service life and low maintenance cost.

[0049] In summary, the utility model provides a kind of power take-off device shell with lubricating function and power take-off device, for input shaft rear bearing 11 is difficult to effectively lubricate, by being provided with first oil collecting groove 101, oil channel 102 and oil passing groove 131 on the rear shell 10 of the power take-off device and rear cover plate 13, the lubricating oil circulation flow channel in shell is formed, the flow lubrication to input shaft rear bearing 11 is realized, lubrication effect is good, and shell structure is simple, and the cost of modification is low, and integration is high.

[0050] The above merely describes preferred embodiments of the present application, and is not intended to limit the technical solutions of the present application in any way. Those skilled in the art should understand that, without departing from the spirit and principle of the present application, the technical solutions can be modified and replaced in several simple ways, and these modifications and replacements also fall within the protection scope of the claims.

Claims

1. A power take-off housing with lubrication function, characterized in that, Includes the power take-off rear housing (10) and the rear cover plate (13) connected thereto. The power take-off housing (10) has a first oil collection groove (101) inside, and the first oil collection groove (101) is connected to an oil passage (102). The rear cover plate (13) is provided with an oil groove (131) and an input gear shaft rear bearing mounting hole (132). The oil groove (131) is connected to the oil passage (102) and the input gear shaft rear bearing mounting hole (132).

2. The power take-off housing with lubrication function according to claim 1, characterized in that, The first oil collection tank (101) is configured to be at least two, and an oil passage (102) is provided to connect to each oil collection tank (101).

3. The power take-off housing with lubrication function according to claim 2, characterized in that, The opening directions of each of the first oil collection tanks (101) are different.

4. The power take-off housing with lubrication function according to claim 1, characterized in that, It also includes a front housing (6) of the power take-off, which is connected to the rear housing (10) of the power take-off; the front housing (6) of the power take-off is provided with a front bearing mounting hole (61) for the output shaft and a second oil collection groove, and the front bearing mounting hole (61) for the output shaft is connected to the second oil collection groove.

5. The power take-off housing with lubrication function according to claim 4, characterized in that, An oil passage hole (62) is provided on the front bearing mounting hole (61) of the output shaft, and the oil passage hole (62) is connected to the second oil collection groove.

6. The power take-off housing with lubrication function according to claim 1, characterized in that, The angle between the oil groove (131) and the horizontal direction is greater than 0°.

7. The power take-off housing with lubrication function according to claim 1, characterized in that, The opening of the first oil collecting tank (101) is smaller than the maximum diameter inside the first oil collecting tank (101).

8. The power take-off housing with lubrication function according to claim 1, characterized in that, The center line of the opening of the first oil collection groove (101) is consistent with the rotation direction of the input gear shaft (9) inside the power take-off housing.

9. The power take-off housing with lubrication function according to claim 1, characterized in that, The width of the oil passage groove (131) is equal to the inner diameter of the oil passage channel (102).

10. A power take-off device, characterized in that, Includes the power take-off housing with lubrication function as described in any one of claims 1-9.

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