Gear shifting system and loading machine

Abstract

The utility model discloses a gear shifting system and a loader, and the gear shifting system comprises a power source which comprises a first input motor and a second input motor; the input shaft comprises a first input shaft connected with the output end of the first input motor and a second input shaft connected with the output end of the second input motor; a shifting gear train is arranged between the intermediate shaft and the first input shaft, and a shifting gear train is arranged between the intermediate shaft and the second input shaft; a transmission gear pair is arranged between the output shaft and the intermediate shaft; the first input shaft, the second input shaft and the output shaft are arranged on the periphery of the middle shaft at intervals in the circumferential direction of the middle shaft. By the adoption of the structure, the occupied space of the gear shifting system can be effectively reduced, meanwhile, installation is convenient, and power is not interrupted during gear shifting.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering vehicle transmission technical field, especially a kind of gear shifting system and loader. BACKGROUND

[0002] The loader is a kind of earthwork construction machinery widely used in highway, railway, building, water and electricity, port, mine and other construction projects.The gear shifting system of existing loader mainly adopts single motor single intermediate shaft structure, although the gear shifting system of single motor single intermediate shaft structure overall structure is relatively simple, but in order to ensure that gear shifting system has enough torque and power, the size of motor and each transmission gear is large, and the weight is heavy, it is very inconvenient to install in loader, and it occupies large space, it is difficult to adapt to various mainstream loaders on the market, so that the loader needs to be transformed after corresponding rack can accommodate gear shifting system, and the replacement property is poor.In addition, the gear shifting system of single motor, power interruption exists inevitably when shifting, and then affect comfort, and in the scene of poor working condition, power interruption will also seriously affect driving safety.

[0003] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing a kind of gear shifting system and loader, to effectively reduce the space occupied by gear shifting system, while, it is convenient to install, and power is not interrupted when shifting.

[0005] The utility model aims at realizing by the following technical scheme: a kind of gear shifting system, comprising:

[0006] Power source, including first input motor and second input motor;

[0007] Input shaft, including the first input shaft being connected with the output end of the first input motor, and the second input shaft being connected with the output end of the second input motor;

[0008] Intermediate shaft, and the first input shaft between, and the second input shaft between being equipped with gear shifting gear train;

[0009] Output shaft, and the intermediate shaft between being equipped with transmission gear pair;

[0010] Among them, the first input shaft, the second input shaft and the output shaft are arranged on the outer circumference of the intermediate shaft along the circumferential direction of the intermediate shaft.

[0011] Further, the input shaft, the intermediate shaft and the output shaft are axially parallel, the first input shaft, the second input shaft, the intermediate shaft and the output shaft have a cross section in a same plane perpendicular to the axial direction, and the cross section has a center a1, a center a2, a center a3 and a center a4, respectively, a line connecting the center a1 and the center a3 is L1, a line connecting the center a2 and the center a3 is L2, and a line connecting the center a4 and the center a3 is L3, the L1, the L2 and the L3 form a Y shape or a T shape.

[0012] Further, the first input shaft and the second input shaft are symmetrically arranged on two sides of the intermediate shaft, and a symmetry axis is collinear with the L3.

[0013] Further, the first input motor and the second input motor are relatively arranged with a stagger along the axial direction of the intermediate shaft.

[0014] Further, the gear shifting gear train comprises:

[0015] a plurality of driven gears fixedly sleeved on the intermediate shaft;

[0016] a plurality of first driving gears hollowly sleeved on the first input shaft and corresponding to the driven gears, respectively, the first driving gears being engaged with different driven gears, respectively;

[0017] a plurality of second driving gears hollowly sleeved on the second input shaft and corresponding to the driven gears, respectively, the second driving gears being engaged with different driven gears, respectively;

[0018] a gear shifting mechanism comprising a first gear shifting mechanism arranged on the first input shaft and a second gear shifting mechanism arranged on the second input shaft;

[0019] The first gear shifting mechanism is adapted to drive connect one of the first driving gears and the first input shaft, or to disconnect all the first driving gears and the first input shaft; and the second gear shifting mechanism is adapted to drive connect one of the second driving gears and the second input shaft, or to disconnect all the second driving gears and the second input shaft.

[0020] Further, the driven gears include a first driven gear and a second driven gear, the first driving gears include a first first-gear driving gear and a first second-gear driving gear, the second driving gears include a second first-gear driving gear and a second second-gear driving gear, the first first-gear driving gear and the second first-gear driving gear are engaged with the first driven gear, the first second-gear driving gear and the second second-gear driving gear are engaged with the second driven gear, the first gear shifting mechanism is located between the first first-gear driving gear and the first second-gear driving gear, and the second gear shifting mechanism is located between the second first-gear driving gear and the second second-gear driving gear.

[0021] Further, the transmission gear pair includes:

[0022] a first transmission gear fixedly sleeved on the intermediate shaft;

[0023] a second transmission gear fixedly sleeved on the output shaft and engaged with the first transmission gear;

[0024] wherein the first transmission gear is located between the first driven gear and the second driven gear.

[0025] Further, the first gear shifting mechanism includes:

[0026] a coupling tooth sleeve, which is synchronously rotatable with the first input shaft, is sleeved outside the first input shaft and is movable along the axial direction of the first input shaft;

[0027] a shift fork, which is connected with the coupling tooth sleeve;

[0028] a gear shifting motor, which is drivingly connected with the shift fork to drive the shift fork to move along the axial direction of the first input shaft, and the coupling tooth sleeve is adapted to be in a neutral position or engaged with one of the first driving gears under the driving of the shift fork;

[0029] wherein the second gear shifting mechanism has the same structure as the first gear shifting mechanism.

[0030] Further, the first input motor and the second input motor are connected in parallel, and the first input motor and the second input motor are both disc motors.

[0031] In addition, the utility model also provides a kind of loader, including the gear shifting system of preceding description.

[0032] Compared with the prior art, the utility model have following beneficial effect: The utility model discloses the power source of double motor structure, under the condition of guaranteeing the torque and power of gear shifting system, the torque and power requirement of single motor is lower, can effectively reduce cost, and can reduce the size and weight of motor and gear shifting gear train accordingly, and then reduce the volume and weight of gear shifting system, improve the convenience and flat replacement of installation, because the size of input shaft is usually smaller, and the size of intermediate shaft is usually larger, first input motor and second input motor are arranged in the intermediate shaft, and first input shaft connected with first input motor, second input shaft connected with second input motor and output shaft are arranged on the outer circumference of intermediate shaft along the circumference direction of intermediate shaft, can further reduce the volume of gear shifting system, reduce its occupied space in the loader, so as to adapt to various mainstream loaders on the market, and the flat replacement is good, in addition, the power source of double motor structure can provide power through another motor when single motor gear shifts, realizes that gear shifting power is not interrupted, greatly improves gear shifting comfort and safety, and can according to the wheel end torque required when vehicle travels, the torque output of two motors is implemented, so that the high efficiency range of double motor simultaneous work is maximized, and the economy can be improved fully. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is the connection diagram of the gear shifting system of the utility model.

[0034] Figure 2 It is the structure schematic view of the gear shifting system of the utility model.

[0035] Figure 3 It is the structure schematic view of the gear shifting system of the utility model after removing the power source.

[0036] Figure 4 It is the installation schematic view of each component on the intermediate shaft in the utility model.

[0037] Figure 5 It is the installation schematic view of each component on the first input shaft in the utility model.

[0038] Figure 6 It is the bottom view of the loader after installing the gear shifting system of the utility model.

[0039] Figure 7 It is the front view of the loader after installing the gear shifting system of the utility model.

[0040] Figure 8 It is the bottom view of the loader after installing the traditional gear shifting system.

[0041] Figure 9 It is the front view of the loader after installing the traditional gear shifting system.

[0042] BRIEF DESCRIPTION OF DRAWINGS:

[0043] 1000, gear shifting system; 110, first input motor; 120, second input motor; 210, first input shaft; 220, second input shaft; 300, intermediate shaft; 400, gear shifting gear train; 410, first gear shifting mechanism; 411, coupling sleeve; 412, shift fork; 4121, connecting sleeve; 4122, connecting piece; 413, gear shifting motor; 420, second gear shifting mechanism; 430, first driven gear; 440, second driven gear; 450, first first driven gear; 460, first second driven gear; 470, second first driven gear; 480, second second driven gear; 500, output shaft; 600, transmission gear pair; 610, first transmission gear; 620, second transmission gear; 700, bearing. DETAILED DESCRIPTION

[0044] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the purpose of description, only the parts related to the present application are shown in the drawings, rather than all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0045] The terms "comprising" and "having" and any variations thereof in the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0046] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive of other embodiments. It is explicitly and implicitly understood that the embodiments described herein can be combined with other embodiments.

[0047] Please refer to Figures 1 to 5As shown, corresponding to the gear shifting system of a preferred embodiment of the utility model, for installation in engineering vehicle, in this embodiment specifically is loader. Gear shifting system 1000 includes: power source, including first input motor 110 and second input motor 120;Input shaft, including with first input motor 110 output end meets first input shaft 210, and with second input motor 120 output end meets second input shaft 220;Intermediate shaft 300, intermediate shaft 300 and first input shaft 210 between, and intermediate shaft 300 and second input shaft 220 between be equipped with gear shifting gear train 400;Output shaft 500, and intermediate shaft 300 between be equipped with transmission gear pair 600;Wherein, first input shaft 210, second input shaft 220, and output shaft 500 along the circumferential spacing of intermediate shaft 300 is arranged in the outer circumference of intermediate shaft 300.

[0048] The utility model discloses a double motor structure's power source cooperates double input shaft common intermediate shaft 300, can reduce power transmission route, improve efficiency, and in the case where guaranteeing torque and power of gear shifting system 1000, the torque and power requirement of single motor is lower, can effectively reduce cost, and correspondingly can reduce the size and weight of motor and gear shifting gear train 400, and then reduce the volume and weight of gear shifting system 1000, improve the convenience and flat replacement of installation;Because the size of input shaft is usually smaller, and the size of intermediate shaft 300 is usually larger, first input motor 110 and second input motor 120 common intermediate shaft 300 setting, with first input motor 110 meets first input shaft 210, with second input motor 120 meets second input shaft 220, and output shaft 500 along the circumferential spacing of intermediate shaft 300 is arranged in the outer circumference of intermediate shaft 300, can further reduce the volume of gear shifting system 1000, reduce its in the occupation space in loader, to adapt to various mainstream loaders on the market, and the flat replacement is good;In addition, the power source of double motor structure, when single motor gear shifting, can provide power through another motor, realizes gear shifting power not to interrupt, greatly improves gear shifting comfort and safety, and can according to the wheel end torque required when vehicle travels implement the torque output of the torque of two motors, so that the high efficiency range of double motor simultaneous operation is maximized, can improve economy fully.

[0049] Further, the input shaft, the intermediate shaft 300 and the output shaft 500 are axially parallel, the first input shaft 210, the second input shaft 220, the intermediate shaft 300 and the output shaft 500 have a center a1, a center a2, a center a3 and a center a4 respectively in a cross section perpendicular to the axial direction and in the same plane, a line connecting the center a1 and the center a3 is L1, a line connecting the center a2 and the center a3 is L2, and a line connecting the center a4 and the center a3 is L3, L1, L2 and L3 form a Y shape or a T shape.

[0050] Preferably, the first input shaft 210 and the second input shaft 220 are symmetrically arranged on both sides of the intermediate shaft 300, and the symmetry axis is collinear with the line L3, so as to keep the shift system 1000 balanced on both sides, ensure balanced power transmission, and facilitate accommodation in the mounting space reserved in the loader. The first input motor 110 and the second input motor 120 are arranged in opposite directions along the axial direction of the intermediate shaft 300, so as to avoid mutual limitation and interference of the first input motor 110 and the second input motor 120 in the radial direction of the intermediate shaft 300, ensure that the first input motor 110 and the second input motor 120 have sufficient installation space, and keep the shift system 1000 balanced on both sides. In addition, in the embodiment, when the shift system 1000 is installed in the loader, the axial direction of the shift system 1000 is parallel to the front-rear direction of the loader, the line L3 is parallel to the vertical direction, and the output shaft 500 is located directly below the intermediate shaft 300, so as to facilitate transmission connection between the output shaft 500 and the front and rear axles of the loader. The positions of the first input shaft 210 and the second input shaft 220 can be adaptively adjusted according to the actual installation space in the loader, so as to adjust the positions of the motors in the vertical direction and the left-right direction of the loader, which is not limited in the utility model.

[0051] Further, the shift gear train 400 comprises driven gears, first driving gears, second driving gears and a shift mechanism. The driven gears are a plurality of gears and are fixedly sleeved on the intermediate shaft 300. The first driving gears are a plurality of gears and are sleeved on the first input shaft 210, and are in one-to-one correspondence with the driven gears, and the plurality of first driving gears are respectively engaged with different driven gears. The second driving gears are a plurality of gears and are sleeved on the second input shaft 220, and are in one-to-one correspondence with the driven gears, and the plurality of second driving gears are respectively engaged with different driven gears. The shift mechanism is located between the first input motor 110 and the second input motor 120. The shift mechanism comprises a first shift mechanism 410 arranged on the first input shaft 210 and a second shift mechanism 420 arranged on the second input shaft 220, the first shift mechanism 410 is adapted to drive connect one of the first driving gears and the first input shaft 210, or to disconnect all the first driving gears and the first input shaft 210; and the second shift mechanism 420 is adapted to drive connect one of the second driving gears and the second input shaft 220, or to disconnect all the second driving gears and the second input shaft 220.

[0052] In the embodiment, the number of driven gears is two, including a first driven gear 430 and a second driven gear 440, and the first driven gear 430 and the second driven gear 440 have a gap therebetween. The transmission gear pair 600 includes a first transmission gear 610 and a second transmission gear 620 which are engaged with each other, the first transmission gear 610 is fixedly sleeved on the intermediate shaft 300 and located between the first driven gear 430 and the second driven gear 440, and the second transmission gear 620 is fixedly sleeved on the output shaft 500 to transmit the power of the intermediate shaft 300 to the output shaft 500.

[0053] Correspondingly, the first driving gear includes a first first-gear driving gear 450 and a first second-gear driving gear 460, and the second driving gear includes a second first-gear driving gear 470 and a second second-gear driving gear 480, the first first-gear driving gear 450 and the second first-gear driving gear 470 are engaged with the first driven gear 430, and the first second-gear driving gear 460 and the second second-gear driving gear 480 are engaged with the second driven gear 440. The transmission ratio between the first first-gear driving gear 450 and the first driven gear 430 and the transmission ratio between the second first-gear driving gear 470 and the first driven gear 430 are the same or different, when the transmission ratios are the same, the gear specification of the gear shifting system 1000 is less, which can effectively reduce the manufacturing cost, when the transmission ratios are different, the gear shifting system 1000 can effectively increase the gear positions to meet more needs, and in the embodiment, the transmission ratios are preferably the same. The transmission ratio between the first second-gear driving gear 460 and the second driven gear 440 and the transmission ratio between the second second-gear driving gear 480 and the second driven gear 440 are the same or different, and the specific advantages can be referred to the foregoing description. In the embodiment, the transmission ratios are also preferably the same.

[0054] Further, the first first-gear driving gear 450 and the first second-gear driving gear 460 have a gap therebetween, and the first gear shifting mechanism 410 is located between the first first-gear driving gear 450 and the first second-gear driving gear 460 to selectively move to the first first-gear driving gear 450 or the first second-gear driving gear 460. The second first-gear driving gear 470 and the second second-gear driving gear 480 have a gap therebetween, and the second gear shifting mechanism 420 is located between the second first-gear driving gear 470 and the second second-gear driving gear 480 to selectively move to the second first-gear driving gear 470 or the second second-gear driving gear 480.

[0055] Specifically, the first gear shifting mechanism 410 comprises a coupling sleeve 411, a shift fork 412 and a gear shifting motor 413. The coupling sleeve 411 is sleeved on the first input shaft 210 synchronously rotatable and movable along the axial direction of the first input shaft 210, and is located between the first first-gear driving gear 450 and the first second-gear driving gear 460. The shift fork 412 is connected with the coupling sleeve 411, and the gear shifting motor 413 is drivingly connected with the shift fork 412 to drive the shift fork 412 to move along the axial direction of the first input shaft 210. The coupling sleeve 411 is adapted to be in the neutral position or engaged with one of the first driving gears under the driving of the shift fork 412. Transmission structure can be arranged between the gear shifting motor 413 and the shift fork 412 to realize linear movement of the shift fork 412, and the transmission structure includes but is not limited to a screw rod structure. The electronic automatic gear shifting is realized by using the gear shifting motor 413, which is fast in response and high in precision, and is beneficial to improve the driving safety, reduce the fatigue of the driver, simplify the driving operation, and effectively improve the use experience.

[0056] The shift fork 412 comprises a connecting sleeve 4121 and a connecting piece 4122 connected with the connecting sleeve 4121. The connecting sleeve 4121 is a through structure in the axial direction of the first input shaft 210, the coupling sleeve 411 is rotatably mounted on the connecting sleeve 4121, and the two ends in the axial direction of the coupling sleeve 411 protrude relative to the connecting sleeve 4121. When the coupling sleeve 411 moves to the first first-gear driving gear 450, one end of the coupling sleeve 411 can be engaged with the first first-gear driving gear 450 to make the first first-gear driving gear 450 rotate synchronously with the coupling sleeve 411. When the coupling sleeve 411 moves to the first second-gear driving gear 460, the other end of the coupling sleeve 411 can be engaged with the first second-gear driving gear 460 to make the first second-gear driving gear 460 rotate synchronously with the coupling sleeve 411. When the coupling sleeve 411 is in the neutral position, the coupling sleeve 411 is not engaged with the first first-gear driving gear 450 and the first second-gear driving gear 460.

[0057] Further, the second gear shifting mechanism 420 is mounted on the second input shaft 220, and has the same structure as the first gear shifting mechanism 410. Details are described above, and will not be described herein.

[0058] Further, the first input motor 110 and the second input motor 120 are connected in parallel, and the first input motor 110 and the second input motor 120 are both disc motors, so as to further reduce the size of the shifting system 1000 in the front-rear direction of the loader and improve the space adaptability. In addition, the shifting system 1000 further comprises a housing (not shown in the figure), and all the components except the power source and the shifting motor 413 are accommodated in the housing, so as to effectively protect the transmission part of the shifting system 1000, and the power source and the shifting motor 413 are fixed outside the housing, so as to facilitate electrical connection with the external structure. Preferably, bearings 700 are arranged on the input shaft, the intermediate shaft 300 and the output shaft 500, and the outer rings of the bearings 700 are fixed to the housing, so as to ensure that the transmission part of the shifting system 1000 is stably connected to the housing.

[0059] When the shifting system 1000 works, the first input motor 110 can transmit power to the intermediate shaft 300 through the first shifting mechanism 410 and the first input shaft 210, and the second input motor 120 can transmit power to the intermediate shaft 300 through the second shifting mechanism 420 and the second input shaft 220, and the power on the intermediate shaft 300 can be transmitted to the output shaft 500 through the transmission gear pair 600, so as to transmit power to the front and rear axles through the output shaft 500; under the gear position switching of the first shifting mechanism 410 and the second shifting mechanism 420, the two can cooperate to form multiple gear positions acting on the intermediate shaft 300, so as to meet different use requirements.

[0060] Further, referring to Figures 6 to 9 The utility model further provides a loader which comprises the aforementioned shifting system 1000, when the shifting system 1000 is installed on the loader, the size of the shifting system 1000 in the left-right direction of the loader is L4, the size in the front-rear direction is L5, and the size in the height direction is H1; and the size of the conventional shifting system 1000' in the left-right direction of the loader is L6, the size in the front-rear direction is L7, and the size in the height direction is H2. Since the size of the shifting system 1000 in the left-right direction and the vertical direction is adjustable, L5 is obviously smaller than L7, and H1 is obviously smaller than H2, the space adaptability and the replacement property of the shifting system 1000 are very good, the shifting system 1000 is suitable for the mainstream fuel loader architecture on the market, can be directly expanded to be pure electric without changing the original vehicle architecture, and is suitable for range expansion.

[0061] The above is only the embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation by using the content of the specification and the drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A gear shifting system, characterized in that, include: The power source includes a first input motor (110) and a second input motor (120); The input shaft includes a first input shaft (210) connected to the output end of the first input motor (110) and a second input shaft (220) connected to the output end of the second input motor (120); A shift gear system (400) is provided between the intermediate shaft (300) and the first input shaft (210) and between the intermediate shaft (300) and the second input shaft (220); The output shaft (500) is provided with a transmission gear pair (600) between itself and the intermediate shaft (300); The first input shaft (210), the second input shaft (220), and the output shaft (500) are arranged circumferentially around the outer periphery of the intermediate shaft (300).

2. The shifting system as described in claim 1, characterized in that, The input shaft, the intermediate shaft (300), and the output shaft (500) are parallel to each other. The first input shaft (210), the second input shaft (220), the intermediate shaft (300), and the output shaft (500) have centers a1, a2, a3, and a4 respectively in a cross section perpendicular to the axial direction and in the same plane. The line connecting the centers a1 and a3 is L1, the line connecting the centers a2 and a3 is L2, and the line connecting the centers a4 and a3 is L3. L1, L2, and L3 form a Y-shape or a T-shape.

3. The shifting system as described in claim 2, characterized in that, The first input shaft (210) and the second input shaft (220) are symmetrically arranged on both sides of the intermediate shaft (300), and the axis of symmetry is collinear with L3.

4. The shifting system as described in claim 1, characterized in that, The first input motor (110) and the second input motor (120) are arranged oppositely and offset along the axial direction of the intermediate shaft (300).

5. The shifting system as described in claim 1, characterized in that, The shift gear system (400) includes: Several driven gears are fixedly sleeved on the intermediate shaft (300); A plurality of first driving gears are loosely fitted onto the first input shaft (210) and correspond one-to-one with the driven gears. The first driving gears mesh with different driven gears respectively. Several second driving gears are loosely fitted onto the second input shaft (220) and correspond one-to-one with the driven gears. The second driving gears mesh with different driven gears respectively. The shifting mechanism includes a first shifting mechanism (410) disposed on the first input shaft (210) and a second shifting mechanism (420) disposed on the second input shaft (220); The first shifting mechanism (410) is adapted to drive one of the first driving gears and the first input shaft (210) or to disengage all the first driving gears from the first input shaft (210); the second shifting mechanism (420) is adapted to drive one of the second driving gears and the second input shaft (220) or to disengage all the second driving gears from the second input shaft (220).

6. The shifting system as described in claim 5, characterized in that, The driven gear includes a first driven gear (430) and a second driven gear (440). The first driving gear includes a first first driving gear (450) and a first second driving gear (460). The second driving gear includes a second first driving gear (470) and a second second driving gear (480). The first first driving gear (450) and the second first driving gear (470) mesh with the first driven gear (430). The first second driving gear (460) and the second second driving gear (480) mesh with the second driven gear (440). The first shifting mechanism (410) is located between the first first driving gear (450) and the first second driving gear (460). The second shifting mechanism (420) is located between the second first driving gear (470) and the second second driving gear (480).

7. The shifting system as described in claim 6, characterized in that, The transmission gear pair (600) includes: The first transmission gear (610) is fixedly sleeved on the intermediate shaft (300); The second transmission gear (620) is fixedly sleeved on the output shaft (500) and meshes with the first transmission gear (610); The first transmission gear (610) is located between the first driven gear (430) and the second driven gear (440).

8. The shifting system as described in claim 5, characterized in that, The first shift mechanism (410) includes: Combined with the toothed sleeve (411), it can be sleeved on the outside of the first input shaft (210) and rotate synchronously with the first input shaft (210), and can move along the axial direction of the first input shaft (210); The shift fork (412) is connected to the engagement sleeve (411); A shift motor (413) is connected to the shift fork (412) to drive the shift fork (412) to move axially along the first input shaft (210). The engagement sleeve (411) is adapted to be in neutral or to mesh with one of the first drive gears under the drive of the shift fork (412). The structure of the second shift mechanism (420) is the same as that of the first shift mechanism (410).

9. The shifting system as described in claim 1, characterized in that, The first input motor (110) and the second input motor (120) are connected in parallel, and both the first input motor (110) and the second input motor (120) are disc motors.

10. A loader, characterized in that, Includes the shifting system (1000) as described in any one of claims 1 to 9.

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