Power takeoff

Abstract

The utility model discloses a power takeoff, and relates to the technical field of transmission equipment, the power takeoff comprises a shell, a pin shaft suspended in the shell, two connecting seats oppositely arranged on the outer wall of the shell, and two sealing covers arranged on the two sides, away from each other, of the two connecting seats, the two axial ends of the pin shaft penetrate and stretch out of the shell and stretch into the two connecting seats correspondingly, and the two sealing covers are arranged on the two sides, away from each other, of the two connecting seats; the end faces, close to each other, of the two sealing covers are connected with the two axial ends of the pin shaft correspondingly and cover the end faces, away from each other, of the two connecting bases correspondingly. In the using process of the power takeoff, the sealing covers are arranged outside the power takeoff and correspond to the connecting bases, and the situation that in the equipment operation process, due to the fact that internal pressure is too large, the sealing performance between the connecting bases and the pin shaft fails, and finally oil leakage is caused is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission equipment, in particular to a power take-off. BACKGROUND

[0002] The power take-off is a power output device attached to the engine of a vehicle, also known as a power output device. The power take-off is a device that outputs the power of the engine to equipment other than the driving system. It is mainly composed of a gear box, a clutch, a controller and other components. Through a precise variable speed gear system, the power of the gearbox is converted into a power source for other equipment. The power take-off is usually installed on the outside of the gearbox as an additional device of the gearbox, and through a specific gear connection, the power output is achieved. It has a wide application in the field of engineering vehicles.

[0003] During the operation of the device, the gear shaft and bearing assembly in the gear box are in rotary motion, and the internal pressure of the power take-off will also change. If the internal pressure of the power take-off is too large, the sealing performance of the power take-off will be lost, causing oil leakage. Therefore, the present application provides a power take-off that can improve the sealing performance of the power take-off and avoid oil leakage caused by sealing failure due to changes in internal pressure during use. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a power take-off to solve the technical problem of sealing failure caused by pressure increase during use of the power take-off.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution:

[0006] A power take-off includes a housing, a pin shaft suspended in the housing, two connecting seats oppositely arranged on the outer wall of the housing, and two sealing covers arranged on the sides of the two connecting seats away from each other. The axial ends of the pin shaft respectively extend out of the housing and extend into the two connecting seats. The end faces of the two sealing covers close to each other are respectively connected to the axial ends of the pin shaft, and cover the end faces of the two connecting seats away from each other, to block the gap between the pin shaft and each connecting seat cover.

[0007] As a further improvement of the present application, the power take-off further includes two sealing washers respectively arranged on the end faces of the two sealing covers close to each other. One sealing washer is arranged on the end face of each sealing cover adjacent to the pin shaft. The connecting seat is provided with a circular hole in interference fit with the side wall of the pin shaft. The end face of the sealing cover adjacent to the pin shaft is provided with an annular clamping groove with a radius consistent with that of the circular hole. One sealing washer is arranged in each annular clamping groove to improve the sealing performance between the pin shaft and each connecting seat.

[0008] As a further improvement of the present application, the power take-off further comprises two bolts respectively arranged at the mutually distanced end faces of the two sealing covers, and the axial two ends of the pin shaft are respectively provided with threaded holes matched with the bolts, and the threaded ends of the two bolts respectively penetrate the two sealing covers and are threadedly connected to the two threaded holes, so that the mutually distanced end faces of the two sealing covers are connected with the axial two ends of the pin shaft.

[0009] As a further improvement of the present application, the power take-off further comprises a mounting plate connected with one end of the shell and at least one gap adjusting sheet stacked on the end face of the mounting plate distanced from the shell, and the mounting plate is provided with a notch in communication with the inside of the shell, and the gap adjusting sheet is matched with the end face of the mounting plate distanced from the shell and used for blocking the gap between the power take-off and external equipment.

[0010] As a further improvement of the present application, the power take-off further comprises a piston, and the shell is provided with an oil passage interface in communication with the inside of the shell, and the piston is movably arranged on the oil passage interface and used for preventing the liquid substance in the shell from leaking out of the oil passage interface.

[0011] The technical scheme provided by the present application can have the following beneficial effects:

[0012] In the use process of the present application, the power take-off is provided with a sealing cover corresponding to each connecting seat, and a sealing ring is arranged at the joint of each sealing cover, connecting seat and pin shaft, so as to block the gap between the pin shaft and connecting seat, and the power take-off and external equipment are provided with a number of gap adjusting sheets which can be increased or decreased, and the oil passage of the shell is provided with a piston, so as to prevent the sealing between the connecting seat and pin from being invalid due to excessive internal pressure during the operation of the equipment, and finally causing oil leakage. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 It is an internal structure schematic diagram of a power take-off;

[0015] Figure 2 It is an exploded schematic diagram of part of the structure of a power take-off;

[0016] Figure 3 It is a three-dimensional structure schematic diagram of a power take-off;

[0017] Reference signs:

[0018] 1, housing; 11, oil port; 2, pin; 21, threaded hole; 3, connecting seat; 31, round hole; 4, sealing cover; 41, annular clamping groove; 5, sealing ring; 6, bolt; 7, mounting plate; 8, adjusting shim; 9, piston. DETAILED DESCRIPTION

[0019] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0020] In addition, the terms "first", "second", "third", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0021] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. 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.

[0022] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0023] In this application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in this specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terms "comprising", "containing", "having" or "including" or any of their derivatives, and "consisting of" are inclusive of an item or items listed after such terms, but do not exclude additional, unrecited items or methods of doing business. In this specification, the terms "comprise", "contain", "have" or "include" or any of their derivatives, and "consist of" are inclusive of an item or items listed after such terms, but do not exclude additional, unrecited items or methods of doing business.

[0024] Although the embodiments of the present application have been shown and described above, it should be understood by those having ordinary skill in the art that the above-mentioned embodiments are exemplary, and cannot be understood as limiting the present application, and those having ordinary skill in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

[0025] The above-mentioned is only optional embodiments of the present application, and does not limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

[0026] Figure 1 An embodiment of a power take-off of the present application is shown, see Figure 1 In this embodiment, the power take-off comprises a housing 1, a pin shaft 2, a connecting seat 3 and a sealing cover 4.

[0027] Wherein, see Figure 1 The pin shaft 2 is suspended in the housing 1, the outer wall of the housing 1 is provided with one connecting seat 3 opposite to each axial end of the pin shaft 2, and each end face of the two connecting seats 3 away from each other is provided with one sealing cover 4, the axial ends of the pin shaft 2 respectively extend to the outside of the housing 1 and extend into the two connecting seats 3, and the end faces of the two sealing covers 4 close to each other are respectively connected with the axial ends of the pin shaft 2 and cover the end faces of the two connecting seats 3 away from each other, limiting the pin shaft 2 while blocking the gap between the connecting seat 3 and the pin shaft 2, preventing the sealing between the connecting seat 3 and the pin from failing due to excessive internal pressure during the operation of the power take-off, and ultimately causing oil leakage.

[0028] It should be noted that the power take-off is also provided with a gear set inside the housing 1, and the gear set is rotatably sleeved on the side wall of the pin shaft 2 through bearings and other components. During the use of the power take-off, the rotation of the gear set and the bearings and other components will increase the internal pressure of the power take-off, which is easy to cause the oil in the power take-off to leak out from the gap between the pin shaft 2 and the connecting seat 3.

[0029] Further, see Figure 2The power take-off further comprises a sealing ring 5, one of which is arranged on each end face of the two sealing covers 4, the connecting seat 3 is provided with a circular hole 31 which is in interference fit with the side wall of the pin shaft 2, and the end face of the sealing cover 4 adjacent to the pin shaft 2 is provided with an annular clamping groove 41 with a radius consistent with that of the circular hole 31, and one sealing gasket is clamped in each annular clamping groove 41, when the two sealing covers 4 are connected to the two axial ends of the pin shaft 2 respectively, the sealing cover 4, the pin shaft 2 and the connecting seat 3 extrude the sealing ring 5, which can further block the gap between the pin shaft 2 and each connecting seat 3, and further improve the sealing performance of the power take-off.

[0030] Optionally, the sealing gasket is made of silica gel, which has certain tension, flexibility, excellent insulation, pressure resistance, high and low temperature resistance, stable chemical properties, insolubility in water and any solvent, and inherent thermal stability.

[0031] Further, referring to Figure 2 The power take-off further comprises a bolt 6, one of which is arranged on each side of the two sealing covers 4 away from each other, and the two axial ends of the pin shaft 2 are provided with threaded holes 21 which are adapted to the threaded ends of the bolts 6, the threaded ends of the two bolts 6 penetrate the two sealing covers 4 respectively and are screwed into the two threaded holes 21, so that the end faces of the two sealing covers 4 away from each other are connected to the two axial ends of the pin shaft 2.

[0032] Further, referring to Figure 3 The power take-off further comprises a mounting plate 7 and a gap adjusting piece 8, one end of the housing 1 is provided with the mounting plate 7, the mounting plate 7 is provided with an opening which is in communication with the inside of the housing 1, and at least one gap adjusting piece 8 is stacked on the end of the mounting plate 7 away from the housing 1, the mounting plate 7 is used to connect the power take-off with external equipment, and the gap adjusting piece can block the gap between the power take-off and the external equipment.

[0033] Optionally, the profile of the gap adjusting piece 8 is consistent with the end face of the mounting plate 7 away from the housing 1, so that the gap adjusting piece does not affect the gear set of the power take-off.

[0034] It should be noted that the gear set of the power take-off needs to be in mesh with the gear set of the external equipment to convert the power of the gearbox into a power source for other equipment, therefore, the mounting plate 7 needs to be provided with an opening for the gear set to leak out.

[0035] Optionally, the number of gap adjusting pieces 8 between the mounting plate 7 and the external equipment can be increased or decreased to change the gap between the gears of the power take-off and the gears of the external equipment, while ensuring the sealing performance between the mounting plate 7 and the external equipment to avoid oil leakage at the connection between the power take-off and the external equipment.

[0036] Further, referring to Figure 3The power take-off further comprises a piston 9, the housing 1 is provided with an oil passage interface 11 which is in communication with the interior of the housing 1, the oil passage interface 11 is used to add oil into the power take-off, and the piston 9 is movably arranged on the oil passage interface 11 and can prevent the liquid substance in the housing 1 from leaking out of the oil passage interface 11.

[0037] Optionally, the oil passage interface 11 is provided with an internal thread, the side of the piston 9 is provided with an external thread which is matched with the internal thread, the piston 9 is threadedly connected with the oil passage structure, and the connection strength between the piston 9 and the oil passage interface 11 can be further improved.

[0038] Optionally, the end of the piston 9 which is exposed from the oil passage structure is provided with a handle, the handle can improve the convenience of the piston 9 and make the disassembly and assembly of the piston 9 more convenient.

[0039] In the embodiment, the power take-off is provided with the sealing cover 4 corresponding to each connecting seat 3, and the sealing ring 5 is arranged at the intersection of each sealing cover 4, the connecting seat 3 and the gap of the pin shaft 2, so as to block the gap between the pin shaft 2 and the connecting seat 3, meanwhile, the number of the gap adjusting pieces 8 between the power take-off and the external equipment can be increased or decreased, and the piston 9 is arranged in the oil passage of the housing 1, so as to prevent the sealing between the connecting seat 3 and the pin from being invalid due to the excessive internal pressure during the operation of the equipment, and finally prevent the oil from leaking.

[0040] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in the form and details without departing from the scope defined by the present application; the sizes of the drawings are not related to the actual sizes, and the actual sizes can be changed arbitrarily.

Claims

1. A power take-off device, characterized in that, The device includes a housing, a pin suspended within the housing, two opposing connecting seats on the outer wall of the housing, and two sealing covers located on opposite sides of the two connecting seats. The axial ends of the pin extend through the housing and into the two connecting seats. The end faces of the two sealing covers that are close to each other are connected to the axial ends of the pin and cover the opposite end faces of the two connecting seats to block the gap between the pin and each connecting seat cover.

2. The power take-off device according to claim 1, characterized in that, It also includes two sealing gaskets respectively located on the end faces of the two sealing caps close to each other. Each sealing cap has a sealing gasket on its end face adjacent to the pin. The connecting seat has a circular hole that is interference-fitted with the side wall of the pin. The end face of the sealing cap adjacent to the pin has an annular groove with a radius consistent with the radius of the circular hole. A sealing gasket is provided in each annular groove to improve the sealing performance between the pin and each connecting seat.

3. The power take-off device according to claim 1, characterized in that, It also includes two bolts respectively located on the two sealing caps and far apart from each other. Both axial ends of the pin are provided with threaded holes adapted to the bolts. The threaded ends of the two bolts pass through the two sealing caps respectively and are threaded to the two threaded holes, so that the end faces of the two sealing caps that are close to each other are connected to the axial ends of the pin.

4. The power take-off device according to claim 1, characterized in that, It also includes a mounting plate connected to one end of the housing, and at least one adjusting plate stacked on the side of the mounting plate away from the housing. The mounting plate has a notch communicating with the interior of the housing. The adjusting plate matches the end face of the mounting plate away from the housing and is used to block the gap between the power take-off and the external equipment.

5. The power take-off device according to claim 1, characterized in that, It also includes a piston, and the housing is provided with an oil passage interface communicating with its interior. The piston is movably mounted on the oil passage interface and is used to prevent liquid substances inside the housing from leaking out of the oil passage interface.

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