Power takeoff output interface protective cover

Abstract

The utility model provides a power takeoff output interface protective cover which comprises a connecting sleeve inserted into an internal spline of a power takeoff, a connecting disc is arranged at the outer end of the connecting sleeve, and a tail handle is arranged on the section of one side, far away from the connecting sleeve, of the connecting disc. According to the protective cover, the connecting sleeve is installed in the power takeoff internal spline through the tail handle, tight installation is achieved through matching of the connecting sleeve and the power takeoff output spline, bolt fixing is not needed, in the disassembling process, the protective cover can be disassembled from the power takeoff by pulling the tail handle, disassembling and assembling are convenient and fast, the disassembling and assembling efficiency is improved, and the cost is reduced. And the detached protective cover can be repeatedly used, so that the production cost of the protective cover is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of power take-off protector technology, specifically belongs to a power take-off output interface protection cover. BACKGROUND

[0002] The power take-off is a group or multiple groups of gear shift gears, also called power output device, which is generally composed of gear box, clutch and controller, and is connected with the low gear of the gear box or the output shaft of the auxiliary gearbox to output power to the external working device. When the power take-off is selected for commercial vehicles, the output interface is usually configured as an internal spline. The power take-off at the rear end of this configuration is connected with the gear pump, and the power of the engine is transmitted to the gear pump through the transmission and the power take-off. The change of oil pressure of the gear pump will drive the external working device of the vehicle. When the output interface of the power take-off is configured as an internal spline, it is necessary to consider that the internal spline part is not invaded by dust and water during storage and transportation, and is not worn and bumped, and thus an interface protection cover needs to be installed for protection.

[0003] The existing protection cover is mostly made of a simple steel plate, which is mostly square in shape and consistent with the output combination surface of the power take-off. A through hole is provided on the steel plate, and a bolt is inserted into the through hole to fix the steel plate on the output combination surface of the power take-off. The steel plate is attached to the output combination surface of the power take-off to achieve sealing. Although this protection structure can protect the power take-off, it needs to be re-made when other power take-offs are replaced, resulting in high manufacturing cost. In addition, during the maintenance and assembly of the power take-off, the protection cover needs to be disassembled for observation of whether the power take-off works normally on the offline bench. After the maintenance is completed, it needs to be reinstalled, which is not convenient for maintenance and requires a long time for disassembly and assembly. Moreover, during the disassembly and assembly process, the screw is easily damaged after being disassembled for many times, resulting in a larger gap between the protection cover and the output combination surface of the power take-off, poor protection effect and influence on the protection of the power take-off. UTILITY MODEL CONTENTS

[0004] In order to solve the problems of inconvenient disassembly during maintenance and assembly of the power take-off, and the damage of the screw caused by repeated disassembly, resulting in a larger gap between the protection cover and the output combination surface of the power take-off and poor protection effect, the utility model provides a power take-off output interface protection cover.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] The utility model provides a power take-off output interface protection cover, which comprises a connecting sleeve inserted into the internal spline of the power take-off, a connecting disc is arranged on the outer end of the connecting sleeve, and a tail handle is arranged on the side section of the connecting disc away from the connecting sleeve.

[0007] Preferably, a limiting piece is arranged on the outer wall of the connecting sleeve, and the limiting piece is engaged with one groove of the inner spline of the power take-off.

[0008] Preferably, the limiting piece comprises a limiting key, the limiting key is arranged along the axial direction of the connecting sleeve, one end of the limiting key is connected with the connecting disc, and the other end of the limiting key is flush with the end face of the connecting sleeve away from the connecting disc.

[0009] Preferably, a bevel is arranged on the end face of the connecting sleeve flush with the limiting key, and the bevel is inclined by 30-32 degrees.

[0010] Preferably, a first chamfer is arranged on the connecting sleeve, and a second chamfer is arranged on the limiting key.

[0011] Preferably, a first weight-reducing groove is arranged in the connecting sleeve, and the inner diameter of the first weight-reducing groove ranges from 25 mm to 26 mm.

[0012] A second weight-reducing groove is arranged in the tail handle, and the inner diameter of the second weight-reducing groove ranges from 10 mm to 12 mm.

[0013] Preferably, the connecting sleeve and the inner spline of the power take-off are connected in an interference fit, and the interference of the interference fit ranges from 0.01 mm to 0.12 mm.

[0014] Preferably, an arc-shaped table is arranged at the connecting position of the connecting sleeve and the connecting disc, so that after the connecting sleeve is inserted into the inner spline of the power take-off, the inner end face of the connecting disc and the end face of the power take-off are reserved with a gap of 1-2 mm.

[0015] Preferably, the outer diameter of the connecting disc ranges from 78 mm to 79 mm, and the thickness ranges from 3 mm to 4 mm.

[0016] Preferably, the tail handle, the connecting disc and the connecting sleeve are made of polyethylene.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] The utility model discloses a power take-off output interface protection cover, the protection cover is installed in the inner spline of the power take-off through the tail handle, and the connecting sleeve is tightly installed through the cooperation of the connecting sleeve and the output spline of the power take-off, does not need to be fixed through the bolt, and in the dismounting process, the protection cover can be disassembled from the power take-off by pulling the tail handle, so that the dismounting is convenient, the dismounting efficiency is improved, and the protection cover can be repeatedly used after dismounting, and the production cost of the protection cover is reduced.

[0019] Further, the protective cover is provided with a limiting piece on the outer wall of the connecting sleeve, the limiting piece is engaged with one groove of the inner spline of the power take-off, the rotation of the protective cover is prevented during the use of the power take-off, the model between the inner spline of the power take-off and the connecting sleeve is avoided, and the service life of the protective cover is prolonged.

[0020] Further, the protective cover is provided with a second chamfer on the limiting key, is provided with a first chamfer on the connecting sleeve, and is provided with an inclined surface on the end surface of the limiting key flush with the inner side end surface of the connecting sleeve, the connecting sleeve is guided when being inserted into the inner spline of the power take-off through the inclined surface, the first chamfer and the second chamfer, and the installation efficiency is improved.

[0021] Further, the protective cover is provided with an arc-shaped table at the connection between the connecting sleeve and the connecting disc, the inner side end surface of the connecting disc and the end surface of the power take-off are reserved with a certain width gap after the connecting sleeve is inserted into the inner spline of the power take-off, the direct contact of the end surfaces caused by improper assembly is effectively avoided, the abrasion and friction are reduced, and the service life of the components is prolonged.

[0022] Further, the protective cover is provided with a weight-reducing groove on the connecting sleeve and the tail handle, the weight of the protective cover is reduced through the weight-reducing groove, the movement is facilitated, and the manufacturing cost is also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A structure schematic view of a power take-off output interface protective cover is provided for the utility model;

[0024] Figure 2 A front view structure schematic view of a power take-off output interface protective cover is provided for the utility model;

[0025] Figure 3 A Figure 2 sectional view of A-A;

[0026] Figure 4 An installation structure schematic view of a power take-off output interface protective cover is provided for the utility model;

[0027] Figure 5 A Figure 4 sectional view of B-B;

[0028] In the drawings: 101, connecting sleeve; 102, connecting disc; 103, tail handle; 104, limiting key; 105, arc-shaped table; 106, second weight-reducing groove; 107, first weight-reducing groove. DETAILED DESCRIPTION

[0029] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different manners without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0030] In the description of the present application, it is to be understood that 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 indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through intermediate medium, or the communication or interaction relationship between 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.

[0033] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0034] The embodiments of the utility model will be described below in detail with reference to the drawings.

[0035] Referring to Figures 1-3 The utility model provides a power takeoff output interface protection cover, the protection cover includes the connecting sleeve 101 of inserting power takeoff inner spline, the length range of connecting sleeve 101 is 23mm~27mm, and the outer diameter is 32mm, and connecting sleeve 101 and power takeoff inner spline are for interference fit connection, and the interference amount of interference fit is 0.01mm~0.12mm, and the connecting sleeve 101 is guaranteed to be not taken out from power takeoff inner spline through friction force, improves the stability of installation, and the outer end of connecting sleeve 101 is provided with the connecting disc 102, and the outer diameter range of connecting disc 102 is 78mm~79mm, and the thickness range is 3mm~4mm, and the connecting disc 102 and connecting sleeve 101 are used to the sealing of power takeoff output joint surface, play dustproof, waterproof function, protect power takeoff inside, and the section of the side away from connecting sleeve 101 on connecting disc 102 is provided with the tang 103, and the installing personnel installs connecting sleeve 101 in power takeoff inner spline or disassembles from power takeoff inner spline through the tang 103, and it is convenient to disassemble, improves disassembly efficiency.

[0036] Referring to Figures 1-5 The outer wall of connecting sleeve 101 is provided with a limiting piece, and the limiting piece is engaged with a groove of the power takeoff inner spline, and the limiting piece comprises a limiting key 104, the limiting key 104 is arranged along the axial direction of the connecting sleeve 101, one end of the limiting key 104 is connected with the connecting disc 102, and the other end surface of the limiting key 104 is flush with the end surface of the connecting sleeve 101 away from the connecting disc 102, and the limiting key 104 is engaged with a groove of the power takeoff inner spline, which can prevent the protection cover from rotating during use of the power takeoff, and avoid wearing the power takeoff and the connecting sleeve 101, thereby prolonging the service life of the protection cover.

[0037] Referring to Figures 1-5 The end surface of the limiting key 104 flush with the end surface of the connecting sleeve 101 is provided with an inclined surface, the inclined surface is inclined at an angle of 30°~32°, a first chamfer with a length of 1mm is arranged on the edge of the connecting sleeve 101, and a second chamfer with a length range of mm~5mm is arranged on the edge of the limiting key 104, the second chamfer, the first chamfer and the inclined surface guide the protection cover during installation, so that the process of installing the protection cover to the power takeoff is more convenient and efficient.

[0038] Referring to Figure 1 And Figure 3As shown, the connecting sleeve 101 is provided with a first weight-reducing groove 107, and the inner diameter of the first weight-reducing groove 107 ranges from 25 mm to 26 mm. The tail handle 103 is provided with a second weight-reducing groove 106, and the inner diameter of the second weight-reducing groove 106 ranges from 10 mm to 12 mm. The first weight-reducing groove 107 and the second weight-reducing groove 106 can reduce the weight of the protective cover, thereby reducing the material cost and making it easier to operate and install.

[0039] The connecting sleeve 101 and the connecting disc 102 are provided with an arc-shaped platform 105 at the connecting position, so that after the connecting sleeve 101 is inserted into the spline of the power take-off, the inner side end surface of the connecting disc 102 and the end surface of the power take-off are reserved with a gap of 1 mm to 2 mm. The reserved gap can effectively avoid the direct contact of the end surfaces due to improper assembly, thereby reducing wear and friction and prolonging the service life of the components. At the same time, the existence of the gap provides a buffer space for thermal expansion or vibration, thereby enhancing the stability and reliability of the structure.

[0040] In this embodiment, the tail handle 103, the connecting disc 102 and the connecting sleeve 101 are made of polyethylene. The protective cover made of polyethylene has a low cost per unit after mass production and can be recycled, thereby avoiding waste and further reducing production costs.

[0041] When the protective cover needs to be installed, the tail handle 103 in the protective cover can be held by hand, and the connecting sleeve 101 is inserted into the spline of the output end of the power take-off. The gap between the two is small, and the protective cover will not easily come out due to friction. The limiting key 104 in the protective cover cooperates with a key groove of the spline to prevent the protective cover from rotating. The connecting disc 102 of the protective cover will sink into the power take-off stop, and a gap of 1 mm to 2 mm is reserved between the two through the arc-shaped platform 105, which will not interfere with the installation process. After installation is completed, the inner side end surface of the connecting disc 102 of the protective cover will be close to the oil seal tail wing of the power take-off, which will achieve an effect similar to that of the power take-off after being installed on the vehicle. The connecting disc 102 cooperates with the tail wing of the power take-off to play a dustproof and waterproof role. The installation process only needs to simply insert the protective cover into the spline of the output side of the power take-off, which is simple and fast.

[0042] When the protective cover needs to be removed (for example, before the power take-off is installed on the vehicle, or when the offline bench needs to observe whether the power take-off is working normally), the operator only needs to pull the tail handle 103 in the protective cover to extract the protective cover from the power take-off, which is simple and fast.

[0043] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic features of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0044] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand. The above is only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application, and any modification made on the basis of the technical solutions according to the technical idea of the present application falls within the protection scope of the claims of the present application.

Claims

1. A power take-off output interface boot, characterized by, The connecting sleeve (101) is provided with a connecting disc (102) on the outer end, and a tail handle (103) is arranged on the section away from the connecting sleeve (101) of the connecting disc (102).

2. A take-off output interface guard as claimed in claim 1, characterised in that, A limiting piece is arranged on the outer wall of the connecting sleeve (101), and the limiting piece is engaged with one groove of the spline in the power take-off.

3. A take-off output interface guard as claimed in claim 2, characterised in that, The limiting piece comprises a limiting key (104) arranged along the axial direction of the connecting sleeve (101), one end of the limiting key (104) is connected with the connecting disc (102), and the other end of the limiting key (104) is flush with the end face of the connecting sleeve (101) away from the connecting disc (102).

4. A take-off output interface guard as claimed in claim 3, characterised in that, An inclined surface is arranged on the end face of the limiting key (104) flush with the end face of the connecting sleeve (101), and the inclined surface is inclined at an angle of 30°-32°.

5. A take-off output interface guard as claimed in claim 4, characterised in that, A first chamfer is arranged on the connecting sleeve (101), and a second chamfer is arranged on the limiting key (104).

6. A take-off output interface guard as claimed in claim 1, wherein, A first weight-reducing groove (107) is arranged in the connecting sleeve (101), and the inner diameter of the first weight-reducing groove (107) ranges from 25 mm to 26 mm. A second weight-reducing groove (106) is arranged in the tail handle (103), and the inner diameter of the second weight-reducing groove (106) ranges from 10 mm to 12 mm.

7. A take-off output interface guard as claimed in claim 1, wherein, The connecting sleeve (101) is connected with the spline in the power take-off in an interference fit, and the interference amount of the interference fit ranges from 0.01 mm to 0.12 mm.

8. A take-off output interface guard as claimed in claim 1, wherein, An arc-shaped table (105) is arranged at the connection between the connecting sleeve (101) and the connecting disc (102), so that after the connecting sleeve (101) is inserted into the spline in the power take-off, a gap of 1 mm-2 mm is reserved between the inner end face of the connecting disc (102) and the end face of the power take-off.

9. A take-off protector according to claim 1, wherein, The outer diameter of the connecting disc (102) ranges from 78 mm to 79 mm, and the thickness ranges from 3 mm to 4 mm.

10. A take-off output interface protective cover according to claim 1, wherein, The tail handle (103), the connecting disc (102) and the connecting sleeve (101) are made of polyethylene.

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