Gearbox output shaft structure
By designing the output shaft structure of the gearbox and using a combination of output gears and shift sleeves, simple gear shifting and multiple seals are achieved, solving the problems of complex structure and oil leakage in existing gearboxes during multi-gear operation, and reducing costs and maintenance difficulty.
Patent Information
- Application Number
- CN202520929853.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-05-12
AI Technical Summary
Existing gearbox designs are complex and costly when implementing multi-gear operation, and the solenoid valves and wet clutches are prone to failure under harsh working conditions, making it difficult to meet the needs of special vehicles.
It adopts a gearbox output shaft structure, and through the first and second output gears and shift sleeves set on the output shaft, it achieves easy gear switching by using shift forks and levers, combined with a multi-seal structure to prevent oil leakage.
It enables simple gear shifting, ensures no oil leakage under harsh operating conditions, and reduces the complexity and maintenance cost of the transmission.
Smart Images
Figure CN223953198U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to gearbox technical field, concretely relates to a gearbox output shaft structure. BACKGROUND
[0002] Hydraulic transmission gearbox is widely used in road vehicles, off-road mobile machinery and many other working conditions. In some special vehicles, it is hoped that the gearbox can realize multi-gear operation such as mechanical neutral gear, high-speed gear and low-speed gear. In the current mainstream gearbox design, the function of multi-gear gearbox is realized by the design of shift solenoid plus wet clutch. Or the electromagnetic valve plus wet clutch and planetary transmission gear transmission mechanism are used to realize multi-gear requirement.
[0003] However, in the process of use, the planetary transmission mechanism gearbox structure is complex, and the durability of the solenoid often fails in harsh working conditions; and in the design of fixed shaft series gearbox, the number of gears determines the number of wet clutches, and the more gears required means the more clutches / brakes, so the complexity of the gearbox will increase, and the manufacturing cost, maintenance cost and other costs will also increase. Therefore, in order to meet the use requirements of the special vehicle and ensure the corresponding number of gears, it is necessary to develop a simple and convenient gear shifting device. CONTENT OF THE UTILITY MODEL
[0004] In order to solve the above problems of the prior art, the utility model provides a gearbox output shaft structure.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] As one aspect of the utility model, a gearbox output shaft structure is provided, which comprises: an output shaft, the left and right sides of the output shaft are movably connected to the gearbox body through bearings;
[0007] A first output gear and a second output gear are rotatably connected to the output shaft, and the first output gear and the second output gear are located in the gearbox body; the first output gear is rotatably connected to the output shaft through a first sliding bearing, and the second output gear is rotatably connected to the output shaft through a second sliding bearing; the first output gear and the second output gear are arranged at intervals;
[0008] A shift sleeve is movably connected to the output shaft, and the shift sleeve moves in the axial direction of the output shaft and cannot rotate relative to the output shaft; the shift sleeve is located between the first output gear and the second output gear;
[0009] A first protruding part is provided on the first output gear, a second protruding part is provided on the second output gear, and a sliding groove is provided on the shift sleeve; the sliding groove of the shift sleeve is matched with the corresponding first protruding part or the corresponding second protruding part.
[0010] The shifting sleeve is movably connected with a shift fork, and the shifting sleeve can rotate relative to the shift fork; the shift fork drives the shifting sleeve to move left or right on the output shaft.
[0011] Optionally, a pull rod is connected with the shift fork; the pull rod is movably arranged on the gearbox housing.
[0012] Optionally, the gearbox further comprises a mounting sleeve connected with the gearbox housing; the pull rod is movably arranged in a mounting inner through hole of the mounting sleeve; an operating end of the pull rod extends to an outside of the mounting sleeve; a plurality of limiting ring grooves are arranged on the pull rod at intervals; a limiting clamping bead adapted to the limiting ring grooves is arranged on the mounting sleeve; a clamping bead mounting groove is arranged on the mounting sleeve, a first elastic member is arranged in the clamping bead mounting groove, and the limiting clamping bead is located on an upper end surface of the first elastic member; under the elastic force of the first elastic member, the limiting clamping bead is clamped with the corresponding limiting ring groove.
[0013] Optionally, the gearbox further comprises a first spacer sleeve movably arranged on the output shaft, and the first spacer sleeve is located between the first output gear and the bearing on the left side.
[0014] Optionally, the gearbox further comprises a second spacer sleeve movably arranged on the output shaft, and the second spacer sleeve is located between the second output gear and the bearing on the right side.
[0015] Optionally, a first output flange is connected with the left end of the output shaft through a fastener; a second output flange is connected with the right end of the output shaft through a fastener; a first oil seal is arranged on the first output flange; and a second oil seal is arranged on the second output flange.
[0016] Optionally, a first dust cover is arranged on the first output flange, and the first oil seal is arranged in the first dust cover; and a second dust cover is arranged on the second output flange, and the second oil seal is arranged in the second dust cover.
[0017] Optionally, the structure of the second protruding part is symmetrical to the structure of the first protruding part; the first protruding part comprises a first protruding body connected with or integrally formed with the first output gear; and an introduction inclined surface is arranged on an edge of an introduction end surface of the first protruding body.
[0018] Optionally, a lubricating hole is arranged on each of the first output gear and the second output gear; and an oil groove is arranged on each of the first output gear and the second output gear.
[0019] The gearbox output shaft structure of the utility model has the advantages that: the shift is operated by the shift fork, and the operation is simple; the multiple sealing structure design ensures no oil leakage and oil seepage in severe working conditions. BRIEF DESCRIPTION OF DRAWINGS
[0020] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the application, and together with the description of the application explain the application. The specific embodiments of the application and the attached drawings serve to explain the application without imposing any undue limitation on the application.
[0021] Figure 1 It is a structural schematic view of the gearbox output shaft structure of the utility model;
[0022] Figure 2 It is a structural sectional view of the first output gear of the utility model;
[0023] Figure 3 It is a structural side view of the first output gear of the utility model;
[0024] Figure 4 It is Figure 2 It is a partial schematic view of A direction;
[0025] Figure 5 It is Figure 3 It is a B-B sectional view. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will combine the specific embodiments of the utility model and the corresponding drawings to clearly and completely describe the technical scheme of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model.
[0027] One embodiment of the gearbox output shaft structure of the utility model, as shown in the figure, comprises: an output shaft 1, the left and right sides of the output shaft 1 are movably connected to a gearbox body 3 through bearings 2 respectively; the inner ring of the bearing 2 is connected with the output shaft 1, and the outer ring of the bearing 2 is connected with the gearbox body 3; Figure 1 The output shaft 1 is rotatably connected with a first output gear 4 and a second output gear 5, the number of teeth of the first output gear 4 and the number of teeth of the second output gear 5 are different, the first output gear 4 is high-speed output, and the second output gear 5 is low-speed output; the first output gear 4 and the second output gear 5 are located in the gearbox body 3;
[0028]
[0029] The first output gear 4 is rotatably connected to the output shaft 1 through a first sliding bearing 6, and the second output gear 5 is rotatably connected to the output shaft 1 through a second sliding bearing 7; the first output gear 4 and the second output gear 5 are arranged in a spaced manner;
[0030] The shift sleeve 8 is movably connected to the output shaft 1 and moves along the axis direction of the output shaft 1 and cannot rotate relative to the output shaft 1; the shift sleeve 8 is located between the first output gear 4 and the second output gear 5;
[0031] The first output gear 4 is provided with a first protruding part 41, the second output gear 5 is provided with a second protruding part 51, and the shift sleeve 8 is provided with a sliding groove; when the shift sleeve 8 moves to the left, the sliding groove of the shift sleeve 8 cooperates with the first protruding part 41 to limit the relative position of the shift sleeve 8 and the first output gear 4, at this time, the second output gear 5 idles on the output shaft 1 through the second sliding bearing 7, and the first output gear 4 rotates to drive the shift sleeve 8 to rotate and drive the output shaft 1 to rotate, thereby realizing high-speed output; when the shift sleeve 8 moves to the right, the sliding groove of the shift sleeve 8 cooperates with the second protruding part 51 to limit the relative position of the shift sleeve 8 and the second output gear 5, at this time, the first output gear 4 idles on the output shaft 1 through the first sliding bearing 6, and the second output gear 5 rotates to drive the shift sleeve 8 to rotate and drive the output shaft 1 to rotate, thereby realizing low-speed output; when the shift sleeve 8 is located between the first output gear 4 and the second output gear 5, the first output gear 4 and the second output gear 5 are in an idle state;
[0032] The shift sleeve 8 is movably connected to the output shaft 1 and moves along the axis direction of the output shaft 1 and cannot rotate relative to the output shaft 1; the shift sleeve 8 is located between the first output gear 4 and the second output gear 5;
[0033] The shift sleeve 8 is movably connected to the output shaft 1 and moves along the axis direction of the output shaft 1 and cannot rotate relative to the output shaft 1; the shift sleeve 8 is located between the first output gear 4 and the second output gear 5;
[0034] Further comprising a mounting sliding sleeve 13 connected to the gearbox housing 3; the pull rod 12 is movably arranged in the mounting inner through hole of the mounting sliding sleeve 13; the operating end of the pull rod 12 extends to the outside of the mounting sliding sleeve 13; a plurality of limiting ring grooves 121 are arranged on the pull rod 12, for example, three limiting ring grooves 121, and the three limiting ring grooves 121 correspond to the left, middle and right positions of the shift sleeve 8 on the output shaft 1; the mounting sliding sleeve 13 is provided with a limiting clamping bead 14 matched with the limiting ring groove 121, the mounting sliding sleeve 13 is provided with a clamping bead mounting groove 141, the first elastic member 142 is arranged in the clamping bead mounting groove 141, and the limiting clamping bead 14 is located on the upper end face of the first elastic member 142; under the elastic force of the first elastic member 142, the limiting clamping bead 14 is clamped with the corresponding limiting ring groove 121, the relative limiting of the pull rod 23 on the gearbox housing 3 is realized, and the position of the shift sleeve 8 is relatively stable; under the action of external force, the pull rod 12 moves outward or inward, the pull rod 12 overcomes the elastic force of the first elastic member 142, forces the limiting clamping bead 14 to move to the clamping bead mounting groove 141, and makes the limiting clamping bead 14 disengage from the corresponding limiting ring groove 121, so as to realize the switching of the corresponding position of the shift sleeve 8 on the output shaft 1 by the pull rod 12.
[0035] Further comprising a first spacer sleeve 9 movably arranged on the output shaft 1, and the first spacer sleeve 9 is located between the first output gear 4 and the bearing 2 on the left side, so that the first output gear 4 works more smoothly.
[0036] Further comprising a second spacer sleeve 10 movably arranged on the output shaft 1, and the second spacer sleeve 10 is located between the second output gear 5 and the bearing 2 on the right side, so that the second output gear 5 works more smoothly.
[0037] Further, the left end of the output shaft 1 is connected with a first output flange 16 through a fastener 15, the first output flange 16 is used for connecting corresponding output members; the right end of the output shaft 2 is connected with a second output flange 17 through a fastener 15, the second output flange 17 is used for connecting corresponding output members; the first output flange 16 is provided with a first oil seal 18, and the number of the first oil seal 18 is two; the first oil seal 18 seals the lubricating oil of the bearing 2 on the left side; the second output flange 17 is provided with a second oil seal 19, and the number of the second oil seal 19 is two; the second oil seal 19 seals the lubricating oil of the bearing 2 on the right side; the first output flange 16 is provided with a first dust cover 20, and the first oil seal 18 is covered in the first dust cover 20; the second output flange 17 is provided with a second dust cover 21, and the second oil seal 19 is covered in the second dust cover 21.
[0038] In an embodiment, as Figure 2 andFigure 4 As shown, the structure of the second protruding part 51 is symmetrical with the structure of the first protruding part 41; the first protruding part 41 comprises a first protruding body 411 connected with or integrally formed with the first output gear 4; the leading end face edge of the first protruding body 411 has a leading bevel 412, facilitating the entry of the shift sleeve 8.
[0039] In an embodiment, as shown in Figure 3 and Figure 5 As shown, the first output gear 4 and the second output gear 5 are respectively provided with lubricating holes 22 for the entry of lubricating oil, and are respectively provided with oil grooves 23 for the collection of lubricating oil, so as to lubricate the bearing 2.
[0040] In summary, the gearbox output shaft structure of the present application has the advantages of simple and easy operation of shifting; the multiple sealing structure design ensures no oil leakage and seepage in harsh working conditions.
[0041] It is to be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise, and it should be further understood that the terms "comprise" and / or "include" as used herein specify the presence of features, steps, operations, devices, components and / or combinations thereof.
[0042] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated. It should be understood that the dimensions of the various parts shown in the drawings are not drawn to scale for ease of description. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification where appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0043] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; The orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.
[0044] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.
[0045] In addition, it should be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore it cannot be understood as a limitation on the scope of protection of the present application.
[0046] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connected" and the like should be understood in a broad sense, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; It can be mechanical connection, or electrical connection; It can be directly connected, or indirectly connected through an intermediate medium, or the communication 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.
[0047] The above is only the preferred embodiment of the present application, any change and modification made within the scope of the present application should be included in the scope of the present application.
Claims
1. A gearbox output shaft arrangement, characterized by, It includes: output shaft, The left and right sides of the output shaft are respectively movably connected to the gearbox body through bearings; The output shaft is rotatably connected with a first output gear and a second output gear, the first output gear and the second output gear are located in the gearbox body; the first output gear is rotatably connected to the output shaft through a first sliding bearing, and the second output gear is rotatably connected to the output shaft through a second sliding bearing; the first output gear and the second output gear are arranged at intervals; The output shaft movably connects a shift sleeve, the shift sleeve moves in the axial direction of the output shaft and cannot rotate relative to the output shaft; the shift sleeve is located between the first output gear and the second output gear; The first output gear is provided with a first protruding part, the second output gear is provided with a second protruding part, and the shift sleeve is provided with a sliding groove; the sliding groove of the shift sleeve is matched with the corresponding first protruding part or the corresponding second protruding part; The shift sleeve movably connects a shift fork, and the shift sleeve can rotate relative to the shift fork; the shift fork drives the shift sleeve to move left or right on the output shaft.
2. The transmission output shaft arrangement of claim 1, wherein The shift fork is connected with a pull rod; the pull rod movably penetrates the gearbox body.
3. The transmission output shaft arrangement of claim 2, wherein, It also includes a mounting sleeve connected to the gearbox body; the pull rod movably penetrates the mounting inner through hole of the mounting sleeve; the operating end of the pull rod extends to the outside of the mounting sleeve; a plurality of limiting ring grooves are arranged on the pull rod at intervals; the mounting sleeve is provided with a limiting bead which is matched with the limiting ring groove; the mounting sleeve is provided with a bead mounting groove, the first elastic element is arranged in the bead mounting groove, the limiting bead is located on the upper end face of the first elastic element, and under the action of the elastic force of the first elastic element, the limiting bead is clamped with the corresponding limiting ring groove.
4. The transmission output shaft arrangement of claim 1, wherein It also includes a first spacer sleeve movably penetrating the output shaft, and the first spacer sleeve is located between the first output gear and the bearing on the left side.
5. The transmission output shaft arrangement of claim 1, wherein It also includes a second spacer sleeve movably penetrating the output shaft, and the second spacer sleeve is located between the second output gear and the bearing on the right side.
6. The transmission output shaft arrangement of claim 1, wherein The left end of the output shaft is connected with a first output flange through a fastener; the right end of the output shaft is connected with a second output flange through a fastener.
7. The transmission output shaft arrangement of claim 6, wherein The first output flange is provided with a first oil seal; the second output flange is provided with a second oil seal.
8. The transmission output shaft arrangement of claim 7, wherein, The first output flange is provided with a first dust cover, and the first oil seal is arranged in the first dust cover; the second output flange is provided with a second dust cover, and the second oil seal is arranged in the second dust cover.
9. The transmission output shaft arrangement of claim 1, wherein, The structure of the second protruding part is symmetrical to that of the first protruding part; the first protruding part includes a first protruding body, and the first protruding body is connected with the first output gear or integrally formed; the leading end face edge of the first protruding body has a leading inclined surface.
10. The transmission output shaft arrangement of claim 1, wherein, The first output gear and the second output gear are respectively provided with lubricating holes, and the first output gear and the second output gear are respectively provided with oil grooves.