A gear box and a shifting method

Abstract

The application discloses a gear box and a gear shifting method, and belongs to the technical field of gear boxes. The gear box has an idle gear and a plurality of power output gears. The gear box comprises a first gear shifting dial for switching the gear box to the idle gear or at least one power output gear; a second gear shifting dial for switching the gear box to the idle gear or at least one power output gear; a first driving member connected to the first gear shifting dial and the second gear shifting dial to drive the first gear shifting dial or the second gear shifting dial to shift gears; and a locking assembly arranged on one side of the first gear shifting dial and the second gear shifting dial to lock the other one when one of the first gear shifting dial and the second gear shifting dial shifts gears. The first driving member is connected to the first gear shifting dial and the second gear shifting dial at the same time, and the locking assembly is used to fix any first gear shifting dial and second gear shifting dial to realize one-side driving, so that the driving structure in the gear box is simplified, the number of driving devices arranged is reduced, and the space occupied by the driving devices in the gear box is reduced.

Description

Technical Field

[0001] This application belongs to the field of gearbox technology, specifically relating to a gearbox and a shifting method. Background Technology

[0002] The gearbox is a crucial device for controlling the power output of an engine, enabling the output of different speeds and torques. To meet the power demands of different operating conditions, the output speed often needs to be statically switched between several specific speeds, which is typically achieved by a multi-ratio gearbox.

[0003] A multi-speed gearbox is a gearbox with multiple pairs of transmission gears between its input and output shafts. Gearboxes with a three-speed ratio or higher require multiple shifting mechanisms to correspond to these multiple pairs of transmission gears. Each shifting mechanism requires a drive unit to change the transmission connection between the input and output shafts by changing different transmission gear pairs, thereby changing the output speed. However, multiple shifting mechanisms and drive units result in a complex assembly structure inside the gearbox and require a lot of space inside the gearbox. Summary of the Invention

[0004] Purpose of the invention: This application provides a gearbox to solve the above-mentioned technical problems; another purpose of this application is to provide a shifting method using the above-mentioned gearbox.

[0005] Technical solution: A gearbox according to this application, the gearbox having a neutral gear and multiple power output gears, the gearbox comprising:

[0006] A first shift dial, the first shift dial being used to switch the gearbox to neutral or at least one power output gear;

[0007] The second shift dial is provided at an interval from the first shift dial, and the second shift dial is used to switch the gearbox to neutral or at least one power output gear.

[0008] A first driving member is connected to the first shift dial and the second shift dial to drive the first shift dial or the second shift dial to shift gears.

[0009] A locking component is disposed on one side of the first shift dial and the second shift dial, and the locking component is used to lock the other shift dial when one of the first shift dial and the second shift dial is shifted.

[0010] In some embodiments, the gearbox further includes:

[0011] The housing has a receiving cavity;

[0012] The first shift dial and the second shift dial are disposed in the receiving cavity, and the first shift dial and the second shift dial are respectively rotatably connected to the housing;

[0013] The first shift dial has a first neutral position for switching the gearbox to neutral in its own rotation direction, and at least one first power position for switching the gearbox to a power output gear;

[0014] The second shift dial has a second neutral position for switching the gearbox to neutral in its own rotation direction, and at least one second power position for switching the gearbox to another power output gear;

[0015] The first driving member has corresponding two ends, and one end of the first driving member is rotatably connected to the first shift dial, and the other end is rotatably connected to the second shift dial.

[0016] In some embodiments, the first drive member includes a cylinder and a telescopic rod connected to the cylinder, wherein one of the cylinder and the telescopic rod is rotatably connected to the first shift dial and the other is rotatably connected to the second shift dial.

[0017] In some embodiments, the first drive element is an electric cylinder.

[0018] In some embodiments, the first shift dial also has a third power gear position in its own rotation direction for switching the gearbox to another power output gear.

[0019] In some embodiments, the third power gear is located on the side of the first neutral gear that is opposite to the first power gear.

[0020] In some embodiments, the locking component includes:

[0021] A first locking member is movably connected to the housing. The first locking member is positioned relative to the first shift dial. The first shift dial has a first neutral slot and a first gear slot for the first locking member to engage. When the first shift dial is in the first neutral position, the first neutral slot faces the first locking member. When the first shift dial is in the first power position, the first gear slot faces the first locking member, so that the first locking member can position the rotational position of the first shift dial.

[0022] The second locking member is movably connected to the housing and is positioned relative to the second shift dial. The second shift dial has a second neutral slot and a second gear slot for the second locking member to engage. When the second shift dial is in the second neutral position, the second neutral slot faces the second locking member. When the second shift dial is in the second power position, the second gear slot faces the second locking member, so that the second locking member can position the rotational position of the second shift dial.

[0023] In some embodiments, the locking component further includes a second drive member connected to the first locking member to drive the first locking member to position the first shift dial;

[0024] And / or, the locking assembly further includes a third drive member connected to the second locking member to drive the second locking member to position the second shift dial.

[0025] In some embodiments, the gearbox further includes:

[0026] A power input shaft, which passes through the housing;

[0027] A power output shaft passes through the housing and is parallel to the power input shaft.

[0028] Multiple pairs of gears, including multiple input gears fixedly sleeved on the power input shaft and multiple output gears disposed on the power output shaft, wherein the output gears mesh with the input gears and the output gears are connected to the power output shaft through rolling bearings;

[0029] A connecting member is provided between each of two adjacent output gears. The connecting member slides along the axial direction of the power output shaft to connect the power output shaft. The first shift dial and the second shift dial are respectively connected to at least one of the connecting members so that the connecting member can drive the opposite output gear and the power output shaft.

[0030] In some embodiments, a plurality of first support seats are fixed within the receiving cavity along the axial direction of the power input shaft, and the power input shaft is rotatably mounted on the plurality of first support seats;

[0031] And / or, a plurality of second support seats are fixed within the receiving cavity along the axial direction of the power output shaft, and the power input shaft is rotatably mounted on the plurality of second support seats.

[0032] In some embodiments, the number of the first support bases is M, satisfying M≥3;

[0033] And / or, the number of the second support is N, satisfying N≥3.

[0034] In some embodiments, a shifting method, applied to a gearbox as described above, includes the following steps:

[0035] Before shifting gears, at least one of the first shift dial and the second shift dial is driven by the first driving component to switch the gearbox to neutral.

[0036] The locking component locks one of the first shift dial and the second shift dial, while the first driving component drives the other, causing the gearbox to switch to power output mode.

[0037] The other one is locked again by the locking component.

[0038] Beneficial Effects: The gearbox in this embodiment has a neutral position and multiple power output positions. The gearbox includes a first shift dial, a second shift dial, a first drive member, and a locking assembly. The first shift dial is used to switch the gearbox to neutral or at least one power output position. The second shift dial is spaced apart from the first shift dial and is also used to switch the gearbox to neutral or at least one power output position. The first drive member connects the first and second shift dials to drive either the first or second shift dial to shift gears. The locking assembly is located on one side of the first and second shift dials and is used to lock the other shift dial when one is shifting gears. By simultaneously connecting the first and second shift dials with the first drive member, and cooperating with the locking assembly, the drive structure within the gearbox is simplified, reducing the number of drive devices and thus minimizing their space occupation within the gearbox. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a simplified plan view of the gearbox according to an embodiment of this application;

[0041] Figure 2 This is a simplified structural diagram of the first shift dial, the second shift dial, the first drive component, and the locking assembly according to an embodiment of this application.

[0042] Figure 3 This is a schematic diagram of the structure of the first and second shift dials in the neutral position of the gearbox according to an embodiment of this application;

[0043] Figure 4 This is a schematic diagram of the structure of the first and second shift dials in the low-speed gear state of the gearbox according to an embodiment of this application;

[0044] Figure 5 This is a schematic diagram of the structure of the first and second shift dials in the medium speed gear state of the gearbox according to an embodiment of this application;

[0045] Figure 6 This is a schematic diagram of the structure of the first and second shift dials in the high-speed gear state of the gearbox according to an embodiment of this application;

[0046] Reference numerals: 1. Gearbox; 10. Neutral; 11. Power output gear; 110. Low gear; 111. High gear; 112. Medium gear; 12. Power input shaft; 13. Power output shaft; 14. Gear pair; 140. Input gear; 141. Output gear; 15. Connecting member; 16. First support base; 17. Second support base; 18. Rolling bearing; 20. First shift dial; 200. First neutral position; 201. First power gear position; 202. Third power gear position ; 203, First neutral slot; 204, First gear slot; 205, Third gear slot; 30, Second shift dial; 300, Second neutral position; 301, Second power gear; 302, Second neutral slot; 303, Second gear slot; 40, First drive component; 400, Cylinder block; 401, Telescopic rod; 50, Locking assembly; 500, First locking component; 501, Second locking component; 502, Second drive component; 503, Third drive component; 60, Housing; 600, Receiving cavity. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified.

[0049] The applicant noted that the gearbox is one of the important power equipment of a ship. For the mud pump gearbox of a dredger driven by a diesel engine, the output speed often needs to be statically switched between several specific speeds depending on the working conditions such as hydrology, soil quality, and discharge distance. However, the speed of the diesel engine is basically fixed. Therefore, this switching between speeds usually needs to be achieved by a multi-speed ratio gearbox with an internal shift mechanism.

[0050] For example, a single driveshaft of a three-speed gearbox contains three transmission gears and multiple shifting mechanisms (such as a shift fork pushing a sliding spline), resulting in a very long axial dimension of the driveshaft. Due to structural limitations, the radial dimension of the driveshaft is restricted. When the driveshaft is supported at two points, its bending stiffness is relatively low, leading to larger radial displacement of components on the shaft, poor meshing of gear teeth, and greater vibration and noise in the gearbox.

[0051] Most gear shifting systems use cylinders as the power source. For two-speed gearboxes, a set of multi-position cylinders drives a set of shift fork components, which can switch between gears (high speed, low speed, and neutral). The function is relatively simple. However, for gearboxes with three speed ratios or higher, multiple sets of cylinders are needed to drive multiple sets of shift fork components. The structure is complex, the function is difficult to implement, and it occupies a large space in the gearbox. Moreover, the positioning accuracy and settableness of the cylinders are low, resulting in a long equipment debugging cycle. In addition, a complete pneumatic system is required, and the maintenance and upkeep of the equipment are also more troublesome.

[0052] In view of this, embodiments of this application disclose a gearbox 1 that can solve at least one of the above-mentioned defects.

[0053] Reference Figure 1 and Figure 2The gearbox 1 has a neutral gear 10 and multiple power output gears 11. Specifically, in this embodiment, a three-speed gearbox 1 is used as an example, meaning that the power output gears 11 include a low-speed gear 110, a medium-speed gear 112, and a high-speed gear 111. It should be understood that in this embodiment, "low," "medium," and "high" refer to gears that have a size difference compared to each other, and do not limit the specific value of their respective output speeds. In other embodiments, gearboxes 1 with a speed ratio of three or higher may have more power output gears 11, which will not be elaborated here.

[0054] The gearbox 1 includes a first shift dial 20, a second shift dial 30, a first drive member 40, and a locking component 50. The first shift dial 20 is used to switch the gearbox 1 to neutral 10 or at least one power output gear 11. The second shift dial 30 is spaced apart from the first shift dial 20 and is used to switch the gearbox 1 to neutral 10 or at least one power output gear 11. The first drive member 40 is connected to the first shift dial 20 and the second shift dial 30 to drive the first shift dial 20 or the second shift dial 30 to shift gears. The locking component 50 is located on one side of the first shift dial 20 and the second shift dial 30 and is used to lock the other shift dial when one shifts gears.

[0055] The first drive unit 40 is connected to the first shift dial 20 and the second shift dial 30 at the same time. The first drive unit 40 can drive the first shift dial 20 and the second shift dial 30 to shift gears at the same time. On this basis, the locking component 50 simplifies the drive structure inside the gearbox 1. That is, the locking component 50 prevents the first shift dial 20 and the second shift dial 30 from moving synchronously and avoids mutual interference, so as to smoothly realize the shifting of gearbox 1. This helps to reduce the number of drive devices arranged inside gearbox 1 and reduce the space occupied by drive devices inside gearbox 1.

[0056] Specifically, in some embodiments, reference is made to Figure 1 and Figure 2 The gearbox 1 also includes a housing 60, a power input shaft 12 and a power output shaft 13 passing through the housing 60, and multiple pairs of gears 14. The housing 60 has a receiving cavity 600, in which a first shift dial 20 and a second shift dial 30 are disposed. The first shift dial 20 and the second shift dial 30 are rotatably connected to the housing 60. In this embodiment, both the first shift dial 20 and the second shift dial 30 are hinged to the housing 60, and the first shift dial 20 and the second shift dial 30 are arranged sequentially in the same direction.

[0057] The power output shaft 13 is parallel to the power input shaft 12. The multiple gear pairs 14 include multiple input gears 140 fixedly sleeved on the power input shaft 12 and multiple output gears 141 disposed on the power output shaft 13. The output gears 141 mesh with the corresponding input gears 140, and the output gears 141 are connected to the power output shaft 13 through rolling bearings 18.

[0058] In this embodiment, corresponding to the three-speed gearbox 1, the multiple gear pairs 14 are configured as three pairs, such as... Figure 1 As shown, the three pairs of gears 14 correspond one-to-one with the low speed gear 110, medium speed gear 112 and high speed gear 111 in the power output gear 11.

[0059] A connector 15 is provided between each of two adjacent output gears 141. The connector 15 slides along the axial direction of the power output shaft 13 to connect the power output shaft 13. The first shift dial 20 and the second shift dial 30 are respectively connected to at least one connector 15 so that the connector 15 can drive the relative output gears 141 and the power output shaft 13.

[0060] It is understood that the connecting member 15 can be a sliding spline that slides to connect the power output shaft 13. The connecting member 15 and both the first shift dial 20 and the second shift dial 30 can be connected via an adaptive shift fork structure. The connecting member 15 can only slide axially along the power output shaft 13. When the gearbox 1 is in power output gear 11, the connecting member 15 is pushed and inserted by the first shift dial 20 or the second shift dial 30 onto the output gear 141 corresponding to power output gear 11. At this time, power is transmitted from the input gear 140 to the output gear 141, and then from the connecting member 15 to the power output shaft 13, thus quickly outputting power for power output gear 11. The shifting structure principle of the sliding spline is existing technology and will not be elaborated further here.

[0061] Correspondingly, refer to Figures 2 to 6 The first shift dial 20 has a first neutral position 200 for switching gearbox 1 to neutral 10 in its own rotation direction, and at least one first power position 201 for switching gearbox 1 to a power output position 11.

[0062] The second shift dial 30 has a second neutral position 300 for switching gearbox 1 to neutral 10 in its own rotation direction, and at least one second power position 301 for switching gearbox 1 to another power output gear 11;

[0063] The first drive member 40 has corresponding two ends, and one end of the first drive member 40 is rotatably connected to the first shift dial 20, and the other end is rotatably connected to the second shift dial 30.

[0064] It should be noted that, in this embodiment, corresponding to the three-speed gearbox 1, the first shift dial 20 also has a third power gear position 202 in its own rotation direction for switching the gearbox 1 to another power output gear 11. The first power gear position 201 controls the gearbox 1 to output a low speed gear 110, the third power gear position 202 controls the gearbox 1 to output a medium speed gear 112, and the second power gear position 301 controls the gearbox 1 to output a high speed gear 111.

[0065] Based on this, in some embodiments, reference is made to Figure 2 The third power gear position 202 is located on the side of the first neutral position 200 opposite to the first power gear position 201. Compared to the third power gear position 202 and the first power gear position 201 being located on the same side of the first neutral position 200, this helps to reduce the rotational travel of the first shift dial 20, thereby reducing the demand on the drive travel of the first drive component 40 and improving space utilization.

[0066] Similarly, in this embodiment, the second power gear position 301 is located on the side of the second neutral position 300 close to the first shift dial 20. Compared with the second power gear position 301 being located on the side of the second neutral position 300 away from the first shift dial 20, the rotation stroke of the second shift dial 30 is reduced, which helps to reduce the demand on the drive stroke of the first drive member 40 and improve space utilization.

[0067] In some embodiments, refer to Figures 2 to 6 The first driving component 40 includes a cylinder body 400 and a telescopic rod 401 connected to the cylinder body 400. One of the cylinder body 400 and the telescopic rod 401 is rotatably connected to the first shift dial 20, and the other is rotatably connected to the second shift dial 30. Specifically, in this embodiment, the first driving component 40 is an electric cylinder. Compared with pneumatic cylinder drive, electric cylinder drive has higher positioning accuracy and does not require an additional pneumatic system, reducing space occupation and improving the shifting accuracy of the gearbox 1.

[0068] In some embodiments, refer to Figures 2 to 6 The locking component 50 includes a first locking element 500 corresponding to the first shift dial 20 and a second locking element 501 corresponding to the second shift dial 30.

[0069] The first locking member 500 is movably connected to the housing 60. The first locking member 500 is positioned relative to the first shift dial 20. The first shift dial 20 is provided with a first neutral slot 203, a first gear slot 204, and a third gear slot 205 for the first locking member 500 to engage. When the first shift dial 20 is in the first neutral position 200, the first neutral slot 203 faces the first locking member 500. When the first shift dial 20 is in the first power position 201, the first gear slot 204 faces the first locking member 500. When the first shift dial 20 is in the third power position 202, the third gear slot 205 faces the first locking member 500, so that the first locking member 500 can position the rotational position of the first shift dial 20.

[0070] Similarly, refer to Figures 2 to 6 The second locking member 501 is movably connected to the housing 60. The second locking member 501 is positioned relative to the second shift dial 30. The second shift dial 30 is provided with a second neutral groove 302 and a second gear groove 303 for the second locking member 501 to engage. When the second shift dial 30 is in the second neutral position 300, the second neutral groove 302 faces the second locking member 501. When the second shift dial 30 is in the second power position 301, the second gear groove 303 faces the second locking member 501, so that the second locking member 501 can position the rotational position of the second shift dial 30.

[0071] The second locking element 501 can also be a locking pin. To improve the automation of gear shifting in the gearbox 1, the locking assembly 50 also includes a third driving element 503. The third driving element 503 is connected to the second locking element 501 to drive the second locking element 501 to position the second shift dial 30. After the second shift dial 30 has shifted gears, the second locking element 501 can be quickly positioned by driving the third driving element 503 to insert into the corresponding second neutral slot 302 or second gear slot 303.

[0072] It is understood that in other embodiments, the first locking member 500 and the second locking member 501 may use a driving device for one and a mechanical actuation for the other, or both may use mechanical actuation to lock and release the first shift dial 20 and the second shift dial 30, which will not be described in detail here.

[0073] In some embodiments, refer to Figure 1 Multiple first support seats 16 are fixed in the cavity 600 along the axial direction of the power input shaft 12, and the power input shaft 12 is rotatably mounted on the multiple first support seats 16.

[0074] Similarly, multiple second support seats 17 are fixed in the cavity 600 along the axial direction of the power output shaft 13, and the power input shaft 12 is rotatably mounted on the multiple second support seats 17.

[0075] It is understood that in other embodiments, if the bending stiffness requirement of the power input shaft 12 and the power output shaft 13 is low and the axial length is short, the stiffness requirement can be met by rotatably connecting the power input shaft 12 and the power output shaft 13 to the housing 60 and arranging a single first support 16 or a second support 17.

[0076] Both the first support 16 and the second support 17 can be made of rolling bearings 18. It is understood that multiple first support 16 and multiple second support 17 are beneficial to reducing the radial movement of the parts on the power input shaft 12 and the power output shaft 13, and to maintaining good meshing of the tooth surfaces of the output gear 141 and the input gear 140.

[0077] Furthermore, in some embodiments, reference is made to... Figure 1 The number of first support bases 16 is M, satisfying M≥3, and the number of second support bases 17 is N, satisfying N≥3.

[0078] In this embodiment, taking M=3 and N=3 as an example, compared with two-point support, three-point support or more forms a statically indeterminate structure, which meets the load requirements of each first support 16 and second support 17. In actual design, the axial distribution positions of multiple first support 16 and second support 17 along the corresponding power input shaft 12 and power output shaft 13 can be flexibly adjusted according to the structural distribution and stiffness requirements of the power input shaft 12, power output shaft 13, gear pair 14 and other parts, and the stiffness of each shaft segment of the power input shaft 12 and power output shaft 13 can be adjusted.

[0079] In other embodiments, the number of first support seats 16 and second support seats 17 can be flexibly increased or decreased according to the actual length and stiffness requirements of the power input shaft 12 and power output shaft 13.

[0080] This embodiment also discloses a gear shifting method applied to the gearbox 1 described above, comprising the following steps:

[0081] Before shifting gears, the first drive unit 40 drives at least one of the first shift dial 20 and the second shift dial 30 to switch the gearbox 1 to neutral 10.

[0082] Locking component 50 locks one of the first shift dial 20 and the second shift dial 30, and the first drive component 40 drives the other, so that the gearbox 1 is switched to power output gear 11;

[0083] Lock the other one again using locking component 50.

[0084] In this embodiment, a three-speed gearbox 1 is taken as an example, referring to... Figures 2 to 6 For example, consider the gears 10 (neutral), 110 (low speed), 112 (medium speed), 111 (high speed), and each gear shifting back to neutral 10.

[0085] Neutral 10: Gearbox 1 is initially set to Neutral 10 by default. Figure 2 and Figure 3 As shown, the first shift dial 20 is located in the first neutral position 200, the second shift dial 30 is located in the second neutral position 300, the first locking member 500 is engaged with the first neutral slot 203, the second locking member 501 is engaged with the second neutral slot 302, and the gearbox 1 outputs neutral 10.

[0086] Neutral 10 to low gear 110: such as Figure 4 As shown, the second locking member 501 engages with the second neutral slot 302, thus fixing the position of the second shift dial 30. The first locking member 500 is disengaged from the first neutral slot 203 by the second driving member 502, and the first shift dial 20 is pushed to the first power gear position 201 by the first driving member 40. Then, the first locking member 500 is extended again by the second driving member 502 and engages with the first gear slot 204 to fix the position of the first shift dial 20.

[0087] Neutral 10 to medium gear 112: such as Figure 5 As shown, the second locking member 501 engages with the second neutral slot 302, thus fixing the position of the second shift dial 30. The first locking member 500 is disengaged from the first neutral slot 203 by the second driving member 502, and the first shift dial 20 is pushed to the third power gear position 202 by the first driving member 40. Then, the first locking member 500 is extended again by the second driving member 502 and engages with the third gear slot 205 to fix the position of the first shift dial 20.

[0088] Neutral 10 to high gear 111: such as Figure 6 As shown, the first locking member 500 engages with the first neutral slot 203, thus fixing the position of the first shift dial 20. The second locking member 501 is disengaged from the second neutral slot 302 by the third driving member 503, and the second shift dial 30 is pushed to the second power gear position 301 by the first driving member 40. Then, the second locking member 501 is extended again by the third driving member 503 to engage with the second gear slot 303, thus fixing the position of the second shift dial 30.

[0089] Similarly, you can switch back to neutral 10 from low gear 110, medium gear 112, or high gear 111.

[0090] Similarly, to switch between low gear 110, medium gear 112, and high gear 111, you can first switch to neutral 10 and then switch to the desired gear. This will not be elaborated on further here.

[0091] The gearbox and shifting method provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A gearbox (1), characterized in that, The gearbox (1) has a neutral gear (10) and multiple power output gears (11), and the gearbox (1) includes: A first shift dial (20) is used to switch the gearbox (1) to neutral (10) or at least one power output gear (11); The second shift dial (30) is provided at an interval from the first shift dial (20), and the second shift dial (30) is used to switch the gearbox (1) to neutral (10) or at least one power output gear (11); A first driving member (40) is connected to the first shift dial (20) and the second shift dial (30) to drive the first shift dial (20) or the second shift dial (30) to shift gears; A locking component (50) is disposed on one side of the first shift dial (20) and the second shift dial (30), and the locking component (50) is used to lock the other shift dial when one of the first shift dial (20) and the second shift dial (30) is shifted.

2. The gearbox (1) according to claim 1, characterized in that, The gearbox (1) also includes: The housing (60) has a receiving cavity (600); The first shift dial (20) and the second shift dial (30) are disposed in the receiving cavity (600), and the first shift dial (20) and the second shift dial (30) are rotatably connected to the housing (60); The first shift dial (20) has a first neutral position (200) for switching the gearbox (1) to neutral (10) in its own rotation direction, and at least one first power position (201) for switching the gearbox (1) to a power output position (11); The second shift dial (30) has a second neutral position (300) in its own rotation direction for switching the gearbox (1) to neutral (10), and at least one second power position (301) for switching the gearbox (1) to another power output position (11); The first drive member (40) has corresponding two ends, and one end of the first drive member (40) is rotatably connected to the first shift dial (20), and the other end is rotatably connected to the second shift dial (30).

3. The gearbox (1) according to claim 2, characterized in that, The first drive unit (40) includes a cylinder (400) and a telescopic rod (401) connected to the cylinder (400). One of the cylinder (400) and the telescopic rod (401) is rotatably connected to the first shift dial (20), and the other is rotatably connected to the second shift dial (30).

4. The gearbox (1) according to claim 3, characterized in that, The first driving component (40) is an electric cylinder.

5. The gearbox (1) according to claim 2, characterized in that, The first shift dial (20) also has a third power gear (202) in its own rotation direction for switching the gearbox (1) to another power output gear (11).

6. The gearbox (1) according to claim 5, characterized in that, The third power gear (202) is located on the side of the first neutral gear (200) away from the first power gear (201).

7. The gearbox (1) according to claim 2, characterized in that, The locking component (50) includes: A first locking member (500) is movably connected to the housing (60). The first locking member (500) is positioned relative to the first shift dial (20). The first shift dial (20) has a first neutral slot (203) and a first gear slot (204) for the first locking member (500) to engage. When the first shift dial (20) is in the first neutral position (200), the first neutral slot (203) faces the first locking member (500). When the first shift dial (20) is in the first power position (201), the first gear slot (204) faces the first locking member (500), so that the first locking member (500) can position the rotational position of the first shift dial (20). The second locking member (501) is movably connected to the housing (60). The second locking member (501) is positioned relative to the second shift dial (30). The second shift dial (30) has a second neutral slot (302) and a second gear slot (303) for the second locking member (501) to engage. When the second shift dial (30) is in the second neutral position (300), the second neutral slot (302) faces the second locking member (501). When the second shift dial (30) is in the second power position (301), the second gear slot (303) faces the second locking member (501), so that the second locking member (501) can position the rotational position of the second shift dial (30).

8. The gearbox (1) according to claim 7, characterized in that, The locking component (50) further includes a second driving member (502), which is connected to the first locking member (500) to drive the first locking member (500) to position the first shift dial (20); And / or, the locking assembly (50) further includes a third drive (503) connected to the second locking member (501) to drive the second locking member (501) to position the second shift dial (30).

9. The gearbox (1) according to any one of claims 2 to 8, characterized in that, The gearbox (1) also includes: A power input shaft (12) is inserted into the housing (60); A power output shaft (13) is inserted inside the housing (60), and the power output shaft (13) is parallel to the power input shaft (12). Multiple pairs of gears (14), each pair of gears (14) includes multiple input gears (140) fixedly sleeved on the power input shaft (12) and multiple output gears (141) disposed on the power output shaft (13). The output gears (141) mesh with the corresponding input gears (140), and the output gears (141) are connected to the power output shaft (13) through rolling bearings (18). A connector (15) is provided between each of two adjacent output gears (141). The connector (15) slides along the axial direction of the power output shaft (13) to connect the power output shaft (13). The first shift dial (20) and the second shift dial (30) are respectively connected to at least one connector (15) so that the connector (15) can drive the opposite output gear (141) and the power output shaft (13).

10. The gearbox (1) according to claim 9, characterized in that, A plurality of first support seats (16) are fixed in the cavity (600) along the axial direction of the power input shaft (12), and the power input shaft (12) is rotatably mounted on the plurality of first support seats (16); And / or, a plurality of second support seats (17) are fixed in the cavity (600) along the axial direction of the power output shaft (13), and the power input shaft (12) is rotatably mounted on the plurality of second support seats (17).

11. The gearbox (1) according to claim 10, characterized in that, The number of the first support bases (16) is M, satisfying M≥3; And / or, the number of the second support (17) is N, satisfying N≥3.

12. A gear-shifting method, characterized in that, The gearbox (1) applied as described in any one of claims 1 to 11 comprises the following steps: Before shifting gears, at least one of the first shift dial (20) and the second shift dial (30) is driven by the first drive unit (40) and the gearbox (1) is switched to neutral (10). The locking component (50) locks one of the first shift dial (20) and the second shift dial (30), and the first drive member (40) drives the other to switch the gearbox (1) to the power output gear (11). The other one is locked again by the locking component (50).

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