Articulated mine car transfer case

Abstract

The utility model discloses a transfer case of a hinged mine vehicle. The transfer case comprises a case body, an input shaft, a differential mechanism, a jaw clutch mechanism, a rear axle output shaft, a front axle output shaft and a transfer shaft, the input shaft and the rear axle output shaft are coaxially arranged, and the rear axle output shaft and the front axle output shaft are arranged in parallel; the rear axle output shaft is in transmission connection with the front axle output shaft; the input shaft distributes power to the rear axle output shaft and the front axle output shaft through a first gear and a second gear of the differential mechanism; wherein the first gear is in spline connection with the rear axle output shaft, the second gear is in spline connection with the transfer shaft, and the transfer shaft is in transmission connection with the front axle output shaft; the differential case can be in transmission connection with the transfer shaft through the jaw clutch mechanism. According to the arrangement, the space of the whole vehicle can be effectively utilized, the integrated planetary gear differential mechanism and the jaw clutch mechanism are compact in structural arrangement and convenient to assemble, and switching operation of the differential lock can be achieved in the low-speed driving process.

Description

Technical Field

[0001] The utility model relates to the field of differential transfer structures, in particular to an articulated mining vehicle transfer case. Background Art

[0002] Medium and heavy-duty vehicles usually connect a transfer case to the rear output end of the transmission, and use the torque splitting function of the transfer case to distribute the engine torque to the front and rear axles in proportion to achieve the vehicle's four-wheel drive function. Currently, most transfer cases used on medium and heavy-duty vehicles directly connect the inter-axle differential with the front and rear axle output shafts, and use the coaxial output form of the front and rear axle output shafts.

[0003] The ground clearance of articulated mining vehicles is relatively high. If a transfer case structure with coaxial output of the front and rear axle output shafts is used, the transfer shaft inclination angle is too large, which affects the structural layout of the vehicle. In addition, the use of the inter-axle differential will cause the vehicle to lose driving force when the tires slip. Utility Model Content

[0004] In order to solve the problems of transfer cases in the prior art, the utility model aims to provide an articulated mining vehicle transfer case, which effectively utilizes the space of the entire vehicle and can realize the switching operation of the differential lock during low-speed driving.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: an articulated mining car transfer case, including a case body, an input shaft, a differential mechanism, a tooth clutch mechanism, a rear axle output shaft, a front axle output shaft and a transfer shaft;

[0006] The input shaft, the front axle output shaft, the rear axle output shaft and the transfer shaft are all rotatably connected to the box body; the input shaft and the rear axle output shaft are coaxially arranged, and the rear axle output shaft and the front axle output shaft are arranged in parallel; the rear axle output shaft and the front axle output shaft are drivingly connected;

[0007] The input shaft is connected to the rear axle output shaft and the front axle output shaft through a differential mechanism; wherein the differential mechanism includes a differential case, a cross shaft, a planetary gear, a first gear and a second gear; the cross shaft is fixed in the differential case, the planetary gear is sleeved on the cross shaft, the first gear and the second gear are respectively arranged on both sides of the planetary gear, and the first gear and the second gear are meshed with the planetary gear for transmission; wherein the input shaft is fixedly connected to the differential case, the first gear is sleeved on the rear axle output shaft, the first gear is splined to the rear axle output shaft, the second gear is sleeved on the transfer shaft, the second gear is splined to the transfer shaft, and the transfer shaft is connected to the front axle output shaft for transmission;

[0008] The differential case and the transfer shaft are connected through a tooth clutch mechanism; wherein the tooth clutch mechanism includes a linkage sleeve, which is arranged on the transfer shaft, the linkage sleeve is spline-connected to the transfer shaft, and both the linkage sleeve and the differential case are provided with external teeth, and the linkage sleeve and the differential case can be driven through the external teeth meshing.

[0009] Preferably, an envelope cavity space is provided inside the differential case, a cross shaft is provided in the envelope cavity space, four shaft portions are protruded from the cross shaft, and each shaft portion is fixedly connected to the differential case; four planetary gears are respectively sleeved on the four shaft portions of the cross shaft.

[0010] Preferably, the transfer shaft is loosely sleeved on the rear axle output shaft, and one end of the transfer shaft is inserted into the differential case and then spline-connected with the second gear.

[0011] Preferably, a through hole is provided on the cross shaft; the rear axle output shaft passes through the through hole of the cross shaft and is connected to the first gear, and is rotationally connected to the differential case.

[0012] Preferably, the transfer shaft is drivingly connected to the front axle output shaft via an idler shaft.

[0013] Preferably, the first idler shaft and the second idler shaft are installed in the housing, the first idler shaft and the transfer shaft are driven by gear meshing, the first idler shaft and the second idler shaft are driven by gear meshing, and the second idler shaft and the front axle output shaft are driven by gear meshing.

[0014] Preferably, the transfer shaft, the first idler shaft, the second idler shaft and the front axle output shaft are all integrally arranged gear shafts.

[0015] Preferably, the housing comprises a first housing and a second housing; the differential mechanism and the input shaft are mounted on the first housing, and the transfer shaft, the rear axle output shaft, the first idler shaft, the second idler shaft and the front axle output shaft are mounted on the second housing.

[0016] Preferably, the first idler shaft, the second idler shaft and both ends of the front axle output shaft are rotationally matched with the first housing and the second housing respectively.

[0017] Preferably, it also includes an external actuator for driving the linkage sleeve to slide on the transfer shaft.

[0018] The beneficial effects of the technical solution of the utility model are as follows: the input shaft and the rear axle output shaft are arranged coaxially, and the front axle output shaft and the rear axle output shaft are arranged off-axis, so that the space of the whole vehicle is effectively utilized; a planetary gear differential mechanism and a differential lock are integrated, the structure is compact and the assembly is convenient; the tooth clutch mechanism adopts the end face tooth form, and the reliability is high. By controlling the movement of the linkage sleeve, the switching operation of the differential lock can be realized during low-speed driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the transfer case of an articulated mining vehicle.

[0020] Figure numerals: 1. linkage sleeve; 2. third bearing; 3. second gear; 4. differential case; 5. cross shaft; 6. planetary gear; 7. first gear; 8. twelfth bearing; 9. input shaft; 10. first bearing; 11. front end cover; 12. second bearing; 13. eighth bearing; 14. tenth bearing; 15. first housing; 16. second housing; 17. front axle output shaft; 18. eleventh bearing; 19. second idler shaft; 20. ninth bearing; 21. seventh bearing; 22. first idler shaft; 23. sixth bearing; 24. transfer shaft; 25. rear axle output shaft; 26. fifth bearing; 27. fourth bearing. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Example

[0026] like Figure 1 An articulated mining vehicle transfer case is shown, comprising a case body, an input shaft 9, a differential mechanism, a tooth clutch mechanism, a rear axle output shaft 25, a front axle output shaft 17 and a transfer shaft 24;

[0027] The input shaft 9, the front axle output shaft 17, the rear axle output shaft 25 and the transfer shaft 24 are all rotatably connected to the housing; the input shaft 9 and the rear axle output shaft 25 are coaxially arranged, and the rear axle output shaft 25 and the front axle output shaft 17 are arranged in parallel; the rear axle output shaft 25 and the front axle output shaft 17 are drivingly connected;

[0028] The input shaft 9 is connected to the rear axle output shaft 25 and the front axle output shaft 17 through a differential mechanism; wherein the differential mechanism includes a differential case 4, a cross shaft 5, a planetary gear 6, a first gear 7, and a second gear 3; the cross shaft 5 is fixed in the differential case 4, the planetary gear 6 is sleeved on the cross shaft 5, the first gear 7 and the second gear 3 are respectively arranged on both sides of the planetary gear 6, and the first gear 7 and the second gear 3 are meshed with the planetary gear 6 for transmission; wherein the input shaft 9 is fixedly connected to the differential case 4, the first gear 7 is sleeved on the rear axle output shaft 25, the first gear 7 is splined to the rear axle output shaft 25, the second gear 3 is sleeved on the transfer shaft 24, the second gear 3 is splined to the transfer shaft 24, and the transfer shaft 24 is connected to the front axle output shaft 17 for transmission;

[0029] The differential case 4 and the transfer shaft 24 are connected through a tooth clutch mechanism; wherein the tooth clutch mechanism includes a linkage sleeve 1, which is sleeved on the transfer shaft 24, and the linkage sleeve 1 is spline-connected to the transfer shaft 24. Both the linkage sleeve 1 and the differential case 4 are provided with external teeth, and the linkage sleeve 1 and the differential case 4 can be driven through the external teeth meshing.

[0030] With such arrangement, the present application arranges the input shaft 9 and the rear axle output shaft 25 coaxially, and the front axle output shaft 17 and the rear axle output shaft 25 eccentrically, so as to effectively utilize the space of the whole vehicle; the planetary gear 6 differential mechanism and the differential lock are integrated, the structure is compact and the assembly is convenient; the tooth clutch mechanism adopts the end face tooth form, and the reliability is high. By controlling the movement of the linkage sleeve 1, the switching operation of the differential lock can be realized during low-speed driving.

[0031] In this embodiment, an envelope cavity space is provided inside the differential case 4, a cross shaft 5 is provided in the envelope cavity space, four shaft portions are protruded from the cross shaft 5, and each shaft portion is fixedly connected to the differential case 4; four planetary gears 6 are respectively sleeved on the four shaft portions of the cross shaft 5; and a through hole is provided on the cross shaft 5. Such a configuration makes the transmission between the various shafts more stable.

[0032] In this embodiment, the transfer shaft 24 is loosely sleeved on the rear axle output shaft 25, one end of the rear axle output shaft 25 extends from the transfer shaft 24 and is inserted into the differential case 4, the rear axle output shaft 25 is connected to the differential case 4 by rotation, the rear axle output shaft 25 passes through the through hole of the cross shaft 5 and is connected to the first gear 7; one end of the transfer shaft 24 is inserted into the differential case 4 and is connected to the second gear 3. Such an arrangement makes the structure of the transfer case more compact.

[0033] In this embodiment, an actuator is also included, and the actuator includes a shift fork, which is sleeved on the linkage sleeve 1, and the shift fork can shift the linkage sleeve 1 to slide on the transfer shaft 24. Such an arrangement facilitates the control of the action of the linkage sleeve 1.

[0034] In this embodiment, the transfer shaft 24 is connected to the front axle output shaft 17 through an idler gear; specifically, the first idler shaft 22 and the second idler shaft 19 are installed in the housing, the first idler shaft 22 and the transfer shaft 24 are driven by gear meshing, the first idler shaft 22 and the second idler shaft 19 are driven by gear meshing, and the second idler shaft 19 and the front axle output shaft 17 are driven by gear meshing.

[0035] In this embodiment, the transfer shaft 24, the first idler shaft 22, the second idler shaft 19 and the front axle output shaft 17 are all gear shafts arranged in one piece, so as to facilitate the assembly and manufacture of the transfer case.

[0036] In this embodiment, the housing includes a front cover 11, a first housing 15, a second housing 16 and a rear cover. The first housing 15 and the second housing 16 are assembled into an installation space. The front cover 11 is fixed to the first housing 15, and the rear cover is fixed to the second housing 16. The first housing 15 and the second housing 16 are fixedly connected. One end of the input shaft 9 passes through the front cover 11 and is inserted into the first housing 15. The differential mechanism is installed in the first housing 15. The differential case 4 of the differential mechanism is connected to the first housing 15 through the first bearing 10 and the second bearing 12. 5 is rotatably connected; the first bearing 10 is a cylindrical roller bearing, and the second bearing 12 is a cylindrical roller bearing; the transfer shaft 24 is rotatably connected to the third bearing 2 and the differential case 4, and the third bearing 2 is a full-complement roller bearing; one end of the rear axle output shaft 25 passes through the second housing 16 and is rotatably connected to the differential case 4 through the twelfth bearing 8, the rear axle output shaft 25 is rotatably connected to the second housing 16 through the fourth bearing 27, and the rear axle output shaft 25 is rotatably connected to the rear end cover through the fifth bearing 26, the twelfth bearing 8 is a cylindrical roller bearing, and the The fourth bearing 27 is a spherical roller bearing, and the fifth bearing 26 is a spherical roller bearing; the first idler shaft 22 is arranged in the second housing 16, one end of the first idler shaft 22 is rotatably connected to the first housing 15 through the sixth bearing 23, and the other end of the first idler shaft 22 is rotatably connected to the second housing 16 through the seventh bearing 21, the sixth bearing 23 is a tapered roller bearing, and the seventh bearing 21 is a tapered roller bearing; the second idler shaft 19 is arranged in the second housing 16, and one end of the second idler shaft 19 is rotatably connected to the first housing 15 through the eighth bearing 13. The first housing 15 is rotatably connected to the second idler shaft 19, and the other end of the second idler shaft 19 is rotatably connected to the second housing 16 through the ninth bearing 20, the eighth bearing 13 is a cylindrical roller bearing, and the ninth bearing 20 is a cylindrical roller bearing; the front axle output shaft 17 is arranged in the second housing 16, and one end of the front axle output shaft 17 is rotatably connected to the first housing 15 through the tenth bearing 14, and the other end of the front axle output shaft 17 is rotatably connected to the second housing 16 through the eleventh bearing 18, the tenth bearing 14 is a cylindrical roller bearing, and the eleventh bearing 18 is a cylindrical roller bearing. Such an arrangement makes the transmission process of the transfer case more stable.

[0037] The specific implementation method of the above-mentioned articulated mining vehicle transfer case is as follows:

[0038] When the linkage sleeve 1 is controlled by the external actuator to move rightward, the linkage sleeve 1 is separated from the differential case 4, and the front axle output shaft 17 and the rear axle output shaft 25 in the transfer case are in a differential state; wherein, the power is input from the input shaft 9, and after the torque splitting action of the differential, it is respectively distributed to the first gear 7 and the second gear 3, the power distributed to the first gear 7 is directly transmitted to the rear axle output shaft 25, and the power distributed to the second gear 3 is sequentially transmitted to the front axle output shaft 17 through the first idler shaft 22 and the second idler shaft 19. In this process, the actual speed of the output shaft is determined by the road conditions. Since the differential case 4 is separated from the linkage sleeve 1, the front axle output shaft 17 and the rear axle output shaft 25 output torque at a fixed torque splitting ratio under the action of the differential, allowing a certain speed difference between the rear axle output shaft 25 and the front axle output shaft 17.

[0039] When the linkage sleeve 1 is controlled by the external actuator to move to the left, the linkage sleeve 1 and the differential case 4 are embedded in each other through the external teeth, that is, the differential lock is in a coupled state. Among them, the differential loses the torque splitting function, and the input power is directly output to the front axle output shaft 17 and the rear axle output shaft 25. In this process, due to the engagement of the differential lock, it can be approximately considered that the front axle output shaft 17 and the rear axle output shaft 25 are rigidly connected, the rotation speeds of the two are the same, and there is no fixed proportional relationship between the torques output by the two. The actual torque is consistent with the driving torque provided by the road surface during driving.

[0040] A specific feature, structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. An articulated mining vehicle transfer case, characterized in that: It comprises a housing, an input shaft (9), a differential mechanism, a tooth clutch mechanism, a rear axle output shaft (25), a front axle output shaft (17) and a transfer shaft (24); The input shaft (9), the front axle output shaft (17), the rear axle output shaft (25) and the transfer shaft (24) are all rotatably connected to the housing; the input shaft (9) and the rear axle output shaft (25) are coaxially arranged, and the rear axle output shaft (25) and the front axle output shaft (17) are parallelly arranged; the rear axle output shaft (25) and the front axle output shaft (17) are drivingly connected; The input shaft (9) is connected to the rear axle output shaft (25) and the front axle output shaft (17) through a differential mechanism; wherein the differential mechanism comprises a differential case (4), a cross shaft (5), a planetary gear (6), a first gear (7) and a second gear (3); the cross shaft (5) is fixed in the differential case (4), the planetary gear (6) is sleeved on the cross shaft (5), the first gear (7) and the second gear (3) are respectively arranged on both sides of the planetary gear (6), and the first gear (7) and the second gear (3) are meshed with the planetary gear (6) for transmission; wherein the input shaft (9) is fixedly connected to the differential case (4), the first gear (7) is sleeved on the rear axle output shaft (25), the first gear (7) is spline-connected to the rear axle output shaft (25), the second gear (3) is sleeved on the transfer shaft (24), the second gear (3) is spline-connected to the transfer shaft (24), and the transfer shaft (24) is connected to the front axle output shaft (17) for transmission; The differential case (4) and the transfer shaft (24) are connected in transmission via a toothed clutch mechanism; wherein the toothed clutch mechanism comprises a linkage sleeve (1), the linkage sleeve (1) being sleeved on the transfer shaft (24), the linkage sleeve (1) being spline-connected to the transfer shaft (24), the linkage sleeve (1) and the differential case (4) both being provided with external teeth, and the linkage sleeve (1) and the differential case (4) being capable of transmission via meshing of the external teeth.

2. The articulated mining vehicle transfer case according to claim 1, characterized in that: An envelope cavity space is provided inside the differential case (4), a cross shaft (5) is provided in the envelope cavity space, four shaft portions are protruded from the cross shaft (5), and each shaft portion is fixedly connected to the differential case (4); four planetary gears (6) are respectively sleeved on the four shaft portions of the cross shaft (5).

3. The articulated mining vehicle transfer case according to claim 1, characterized in that: The transfer shaft (24) is loosely sleeved on the rear axle output shaft (25), and one end of the transfer shaft (24) is inserted into the differential case (4) and spline-connected with the second gear (3).

4. The articulated mining vehicle transfer case according to claim 1, characterized in that: A through hole is provided on the cross shaft (5); the rear axle output shaft (25) passes through the through hole of the cross shaft (5) and is connected to the first gear (7), and is rotationally connected to the differential case (4).

5. The articulated mining vehicle transfer case according to claim 1, characterized in that: The transfer shaft (24) is drivingly connected to the front axle output shaft (17) via an idler shaft.

6. The transfer case of an articulated mining vehicle according to claim 5, characterized in that: A first idler shaft (22) and a second idler shaft (19) are mounted in the housing; the first idler shaft (22) and the transfer shaft (24) are driven by gear meshing, the first idler shaft (22) and the second idler shaft (19) are driven by gear meshing, and the second idler shaft (19) and the front axle output shaft (17) are driven by gear meshing.

7. The articulated mining vehicle transfer case according to claim 6, characterized in that: The transfer shaft (24), the first idler shaft (22), the second idler shaft (19) and the front axle output shaft (17) are all gear shafts arranged in one piece.

8. The articulated mining vehicle transfer case according to claim 1, characterized in that: The housing comprises a first housing (15) and a second housing (16); the differential mechanism and the input shaft (9) are both mounted on the first housing (15), and the transfer shaft (24), the rear axle output shaft (25), the first idler shaft (22), the second idler shaft (19) and the front axle output shaft (17) are all mounted on the second housing (16).

9. The transfer case of an articulated mining vehicle according to claim 8, characterized in that: The first idler shaft (22), the second idler shaft (19) and the two ends of the front axle output shaft (17) are respectively rotatably matched with the first housing (15) and the second housing (16).

10. The articulated mining vehicle transfer case according to claim 1, characterized in that: It also includes an external actuator for driving the linkage sleeve (1) to slide on the transfer shaft (24).

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