NGW continuously variable transmission and crane comprising same

Abstract

The invention relates to an NGW continuously variable transmission and a crane. An NGW continuously variable transmission comprises a main input assembly and an auxiliary input assembly. The main input assembly comprises a first-stage main input assembly, the first-stage main input assembly comprises a first-stage main input sun gear, a first-stage main input planet gear meshed with the first-stage main input sun gear and a first-stage main input inner gear ring meshed with the first-stage main input planet gear, the first-stage main input planet gear is connected with a first-stage main input planet carrier, and the first-stage main input planet carrier is connected with a resultant motion output shaft; the auxiliary input assembly comprises a first-stage auxiliary input assembly, the first-stage auxiliary input assembly comprises a first-stage auxiliary input sun gear, a first-stage auxiliary input planet gear meshed with the first-stage auxiliary input sun gear and a first-stage auxiliary input inner gear ring meshed with the first-stage auxiliary input planet gear, the first-stage auxiliary input planet gear is connected with a first-stage auxiliary input planet carrier, and a first-stage main input inner gear ring is fixed to the supporting frame. The primary auxiliary input planet carrier is fixedly connected with the supporting frame. The crane comprises the continuously variable transmission and a roller. The stepless speed change device has the function of stepless speed change without shutdown, tooth breaking and rotation losing.

Description

Technical Field

[0001] The invention belongs to the field of transmissions, and in particular relates to an NGW stepless transmission and a crane comprising the same. Background Art

[0002] A continuously variable transmission is an automatic transmission that can continuously obtain any transmission ratio within the transmission range. This type of transmission is also called a stepless transmission. Due to its smooth speed regulation characteristics and high efficiency, the continuously variable transmission can be applied to many fields, mainly including the automotive industry, construction machinery and agricultural machinery, power tools, and mechanical equipment on production lines.

[0003] At present, there are two ways to achieve continuously variable speed: One method is to use a friction cone wheel to change the contact radius to achieve stepless speed change. However, this speed change scheme will cause "loss of rotation" during the switching process. It cannot meet the requirements of applications that require precise control of the output speed. At the same time, its safety and reliability cannot be guaranteed under high-speed and heavy-load conditions.

[0004] Another way is to use gear meshing "shifting", that is, to switch the meshing gear set when the machine is stopped to achieve speed change, which requires stopping the machine. Not only is the work efficiency low, there is also the risk of "tooth knocking", and the "shifting" operation cannot be completed without stopping the machine.

[0005] How to solve the above problems existing in the continuously variable transmission and provide a safe, reliable and accurately controlled continuously variable transmission is urgently needed. Summary of the invention

[0006] We hope to implement gear shifting and speed regulation without stopping the machine, while avoiding gear knocking and loss of rotation, and to accurately control the output speed of the continuously variable transmission safely and reliably.

[0007] The present application provides a NGW continuously variable transmission, which adopts the following technical solution: An NGW continuously variable transmission comprises a main input assembly and a secondary input assembly which are sequentially arranged along the axial direction; The main input assembly includes a primary main input assembly, which includes a primary main input sun gear, a plurality of primary main input planetary gears meshing with the primary main input sun gear, and a primary main input inner gear ring meshing with the primary main input planetary gears, the primary main input planetary gears are fixed on a primary main input planet carrier, and the primary main input planet carrier is connected to a synthetic motion output shaft; The auxiliary input assembly includes a primary auxiliary input assembly, which includes a primary auxiliary input sun gear, a plurality of primary auxiliary input planetary gears meshing with the primary auxiliary input sun gear, and a primary auxiliary input internal gear ring meshing with the primary auxiliary input planetary gears, the primary auxiliary input planetary gears are fixed on a primary auxiliary input planet carrier, the primary main input internal gear ring is fixed on a support frame, and the primary auxiliary input planet carrier is fixedly connected to the support frame.

[0008] By adopting the above technical solution, the speed of the synthetic motion output shaft is synthesized by the motion transmitted to the primary main input inner gear ring by the primary main input sun gear and the primary auxiliary input sun gear. That is, the output speed can be controlled by changing the auxiliary input speed (the primary auxiliary input sun gear speed) when the main input speed (the primary main input sun gear speed) remains unchanged. The equipment to be driven can be fixedly connected to the synthetic motion output shaft to drive the equipment to achieve stepless speed change without stopping and without gear knocking.

[0009] Optionally, the main input assembly and the auxiliary input assembly are both configured to be multi-stage, and the support frame comprises an auxiliary input support frame located on a side of the primary main input inner gear ring facing the primary auxiliary input planetary carrier and a main input support frame located on the other side of the primary main input inner gear ring; The multiple stages of the main input components are connected in series in sequence and are located on one side of the auxiliary input support frame, and the multiple stages of the auxiliary input components are connected in series in sequence and are located on the other side of the auxiliary input support frame.

[0010] By adopting the above technical solution, multiple main input components are set up to complete the function of multiple speed reduction and torque increase on the main input side, and multiple auxiliary input components are set up to complete the function of multiple speed reduction and torque increase on the auxiliary input side, while achieving stepless speed change, the output torque of the transmission is guaranteed. The first-stage auxiliary input planetary frame drives the auxiliary input support frame to rotate, and the auxiliary input support frame and the main input support frame together drive the first-stage main input inner gear ring to rotate, so that the first-stage auxiliary input sun gear transmits the motion to the first-stage main input inner gear ring, so that the first-stage main input inner gear ring can affect the speed of the first-stage main input planetary gear.

[0011] Optionally, the number of the first-stage main input planetary gears and the number of the first-stage auxiliary input planetary gears are both set to three at intervals.

[0012] By adopting the above technical solution, the number of the first-stage main input planetary gear and the first-stage auxiliary input planetary gear are both set to three, which can form a stable triangular structure, and is more stable when the first-stage main input planetary carrier or the first-stage auxiliary input planetary carrier rotates.

[0013] Optionally, a first-stage main input planetary shaft is provided on the first-stage main input planetary wheel, and a first-stage main input planetary wheel bearing is provided between the first-stage main input planetary shaft and the first-stage main input planetary wheel; A first-stage auxiliary input planetary shaft is arranged on the first-stage auxiliary input planetary wheel, and a first-stage auxiliary input planetary wheel bearing is arranged between the first-stage auxiliary input planetary shaft and the first-stage auxiliary input planetary wheel.

[0014] By adopting the above technical solution, setting the planet shaft can not only enable the planetary wheel to rotate relative to the planetary carrier, but also enable the planetary wheel to drive the planetary carrier to rotate, that is, the planetary wheel can rotate or revolve, and the bearing can make the rotating planetary carrier rotate more smoothly.

[0015] Optionally, the primary main input sun gear is sleeved on the main input shaft, and the two are fixedly connected or integrally arranged; The primary auxiliary input sun gear is sleeved on the auxiliary input shaft, and the two are fixedly connected or integrally arranged.

[0016] By adopting the above technical solution, the integrated setting makes the installation of the sun gear more convenient; the sleeve setting makes the disassembly of the sun gear more convenient.

[0017] Optionally, the synthetic motion output shaft is a hollow shaft and is spaced apart and sleeved on one side of the main input shaft.

[0018] By adopting the above technical solution, the arrangement of the hollow shaft can make the overall structure more compact.

[0019] Optionally, the first-stage auxiliary input internal gear ring is arranged on the auxiliary input side bracket, and the auxiliary input side bracket is connected to the main input side bracket on the side close to the first-stage main input internal gear ring, the main input support frame and the main input side bracket are connected through a first bearing, and the auxiliary input side bracket and the first-stage auxiliary input planetary carrier are connected through a second bearing.

[0020] By adopting the above technical solution, the auxiliary input side bracket is used for installing the primary auxiliary input internal gear ring, and the main input side bracket is sleeved on the main input support frame to support the main input support frame.

[0021] In a second aspect, the present application provides a crane for the aforementioned NGW stepless transmission, which adopts the following technical solution: A crane comprises the aforementioned NGW continuously variable transmission, and also comprises a drum, one side of the drum is connected to the main input assembly and rotates under the drive of the main input assembly, and the other side of the drum is connected to a drum support, and the drum support is connected to a supporting structure through a bearing.

[0022] By adopting the above technical solution, the NGW stepless transmission of the present application is used in a crane, which can achieve continuous and uniform speed changes, is lightweight, and can improve work efficiency, and improve the stability and safety of the crane during lifting.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: The speed of the synthetic motion output shaft is obtained by synthesizing the motion transmitted to the primary main input inner gear ring by the primary main input sun gear and the primary auxiliary input sun gear. That is, the output speed can be controlled by changing the auxiliary input speed while the main input speed remains unchanged. The equipment that needs to be driven can be fixedly connected to the synthetic motion output shaft to drive the equipment that needs to achieve stepless speed change to complete the speed change without stopping or causing gear knocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a left view of the NGW continuously variable transmission embodying the present application; Figure 2 It is a manifestation Figure 1 AA section view of NGW continuously variable transmission; Figure 3 It is a schematic diagram of the structure of the crane embodying the present application.

[0025] Description of reference numerals: 1. Synthetic motion output shaft; 2. First bearing; 3. Second bearing; 4. Roller; 5. Roller support; 6. Support structure; 10. Primary main input assembly; 11. Primary main input sun gear; 111. Primary main input shaft; 12. Primary main input planetary gear; 121. Primary main input planetary shaft; 13. Primary main input inner gear ring; 14. Primary main input planetary carrier; 15. Support frame; 151. Auxiliary input support frame; 152. Primary input support frame; 16. Primary main input planetary gear bearing; 17. Primary input side bracket; 20. Primary auxiliary input assembly; 21. Primary auxiliary input sun gear; 211. Auxiliary input shaft; 22. Primary auxiliary input planetary gear; 221. Primary auxiliary input planetary shaft; 23. Primary auxiliary input inner gear ring; 24. Primary auxiliary input planet carrier; 25. Primary auxiliary input planetary gear bearing; 26. Auxiliary input side bracket; 30. Secondary main input assembly; 40. Third-level main input assembly; 50. Secondary auxiliary input assembly; 60. Third-level auxiliary input assembly. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-Figure 3 This application is described in further detail.

[0027] The embodiment of the present application discloses a NGW continuously variable transmission. Example

[0028] See also Figure 1 and Figure 2 , a NGW continuously variable transmission, comprising a main input assembly and a secondary input assembly arranged in the axial direction, Figure 2 The left, right, top and bottom are used as the directions for description. The main input component is located on the left side, and the sub-input component is located on the right side. The main input component includes a primary main input component 10 located on the left side and a primary sub-input component 20 located on the right side of the primary main input component 10.

[0029] The primary main input assembly 10 includes a main input shaft 111 and a primary main input sun gear 11 sleeved on the main input shaft 111. The primary main input sun gear 11 can be fixed on the main input shaft 111, and the two can also be set as an integral part. The primary main input sun gear 11 is externally meshed with a plurality of primary main input planetary gears 12. In this embodiment, there are three primary main input planetary gears 12 arranged in a triangle, but it is not limited to three.

[0030] A primary main input planetary shaft 121 is inserted into the center of the primary main input planetary wheel 12 , and a primary main input planetary wheel bearing 16 is arranged between the primary main input planetary shaft 121 and the primary main input planetary wheel 12 .

[0031] A plurality of primary main input planetary gears 12 are arranged together on the outside and meshed with a primary main input inner gear ring 13 on the inside. Each primary main input planetary gear 12 is fixed on a primary main input planet carrier 14. The primary main input planet carrier 14 is spline-connected to the synthetic motion output shaft 1. The primary main input inner gear ring 13 is fixed on a support frame 15.

[0032] The primary auxiliary input assembly 20 includes a secondary input shaft 211 and a primary auxiliary input sun gear 21 sleeved on the secondary input shaft 211. The primary auxiliary input sun gear 21 can be fixed on the secondary input shaft 211, and the two can also be set as an integral part. The primary auxiliary input sun gear 21 is externally meshed with a plurality of primary auxiliary input planetary gears 22. In this embodiment, there are three primary auxiliary input planetary gears 22 arranged in a triangle, but it is not limited to three.

[0033] A primary auxiliary input planetary shaft 221 is inserted into the center of the primary auxiliary input planetary gear 22 , and a primary auxiliary input planetary gear bearing 25 is arranged between the primary auxiliary input planetary shaft 221 and the primary auxiliary input planetary gear 22 .

[0034] A plurality of primary auxiliary input planetary gears 22 are commonly arranged outside and meshed with a primary auxiliary input inner gear ring 23 . Each primary auxiliary input planetary gear 22 is fixed on a primary auxiliary input planet carrier 24 .

[0035] The first-stage auxiliary input internal gear ring 23 is arranged on the auxiliary input side bracket 26, and the auxiliary input side bracket 26 is connected to the main input side bracket 17 on the side close to the first-stage main input internal gear ring 13. The main input support frame 152 and the main input side bracket 17 are connected through the first bearing 2, and the auxiliary input side bracket 26 and the first-stage auxiliary input planetary carrier 24 are connected through the second bearing 3.

[0036] The primary auxiliary input planet carrier 24 is also fixedly connected to the support frame 15. The support frame 15 includes an auxiliary input support frame 151 located on the side of the primary main input internal gear ring 13 facing the primary auxiliary input planet carrier 24 and a main input support frame 152 located on the other side of the primary main input internal gear ring 13. The primary main input internal gear ring 13 is clamped and fixed between the auxiliary input support frame 151 and the main input support frame 152, and the primary auxiliary input planet carrier 24 is fixedly connected to the auxiliary input support frame 151.

[0037] The working principle of this embodiment is: The main input assembly plays the role of the main driving force: the input is from the primary main input sun gear 11, the primary main input sun gear 11 is externally meshed with the primary main input planetary gear 12, and the primary main input planetary gear 12 is also internally meshed with the primary main input inner gear ring 13, the primary main input planetary gear 12 transmits the motion to the outer ring of the primary main input planetary gear bearing 16, the primary main input planetary gear bearing 16 transmits the motion to the primary main input planetary shaft 121 fixedly connected to its inner ring through its own rolling element, and since the primary main input planetary shaft 121 is fixedly connected to the primary main input planetary carrier 14, the motion is transmitted to the primary main input planetary carrier 14 and drives the primary main input planetary carrier 14 to rotate, and then the primary main input planetary carrier 14 transmits the motion to the synthetic motion output shaft 1 connected to it through a spline, driving the synthetic motion output shaft 1 to rotate; The auxiliary input assembly plays the role of control force: the input is from the primary auxiliary input sun gear 21, the primary auxiliary input sun gear 21 is externally meshed with the primary auxiliary input planetary gear 22, and the primary auxiliary input planetary gear 22 is also internally meshed with the primary auxiliary input inner gear ring 23, the primary auxiliary input planetary gear 22 transmits the motion to the outer ring of the primary auxiliary input planetary gear bearing 25, and the primary auxiliary input planetary gear bearing 25 transmits the motion to the primary auxiliary input planetary shaft 221 fixedly connected to its inner ring through its own rolling element, and since the primary auxiliary input planetary shaft 221 is fixedly connected to the primary auxiliary input planetary carrier 24, the primary auxiliary input planetary shaft 221 drives the primary auxiliary input planetary carrier 24 to rotate, and the primary auxiliary input planetary carrier 24 is fixedly connected to the auxiliary input support frame 151, and the primary auxiliary input planetary carrier 24 thereby transmits the motion to the auxiliary input support frame 151 and drives the auxiliary input support frame 151 to rotate, and then transmits the control motion input by the auxiliary input assembly to the primary main input inner gear ring 13. That is, the primary main input inner gear ring 13 is controlled to rotate from the auxiliary input assembly.

[0038] According to the NGW motion transmission principle, the speed of the synthetic motion output shaft 1 is synthesized by the motion transmitted from the primary main input sun gear 11 and the primary auxiliary input sun gear 21 to the primary main input inner gear ring 13. That is, the output speed can be controlled by changing the auxiliary input speed (the speed of the primary auxiliary input sun gear 21) while the main input speed (the speed of the primary main input sun gear 11) remains unchanged. The equipment that needs to be driven can be fixedly connected to the synthetic motion output shaft 1 to drive the equipment that needs to achieve stepless speed change to complete the speed change without stopping or causing gear knocking. Example

[0039] Please also read Figure 3 The difference between the second embodiment and the first embodiment is that in the second embodiment, the main input component and the auxiliary input component are both configured to be multi-stage, the multi-stage main input components are all located on one side of the shaft, and the multi-stage auxiliary input components are all located on the other side of the shaft.

[0040] The multiple-stage main input components are sequentially connected in series and are located on one side of the auxiliary input support frame 151, and the multiple-stage auxiliary input components are sequentially connected in series and are located on the other side of the auxiliary input support frame 151. That is, the side of the primary main input component 10 away from the primary auxiliary input component 20 is sequentially provided with the secondary main input component 30, the tertiary main input component 40, etc., and the side of the primary auxiliary input component 20 away from the primary main input component 10 is sequentially provided with the secondary auxiliary input component 50, the tertiary auxiliary input component 60, etc. In short, the required number of stages can be set according to needs.

[0041] The diameter of the secondary input shaft of each level of secondary input assembly gradually increases toward the side close to the main input assembly, and the diameter of each level of secondary input sun gear also increases step by step, which can achieve the effect of reducing the secondary input side speed and increasing the secondary input side torque. The diameter of the main input shaft of each level of main input assembly gradually increases toward the side away from the secondary input assembly, and the diameter of each level of main input sun gear also increases step by step, which can achieve the effect of reducing the main input side speed and increasing the main input side torque. In turn, the output speed of the entire NGW continuously variable transmission can be controlled to achieve stepless speed change, and the output torque can also be guaranteed.

[0042] The embodiment of the present application also discloses a crane.

[0043] See also Figure 3 A crane includes the aforementioned NGW continuously variable transmission, and also includes a drum 4, one side of which is connected to the main input component and rotates under the drive of the inner gear ring of the main input component, and the other side of the drum is supported and connected to a drum support 5, and the drum support 5 is connected to a support structure 6 through a bearing.

[0044] Both the main input assembly and the auxiliary input assembly have three stages. The side of the main input assembly facing away from the primary auxiliary input assembly 20 is provided with a primary main input assembly 10, a secondary main input assembly 30, and a third main input assembly 40 in sequence. The side of the auxiliary input assembly facing away from the primary main input assembly 10 is provided with a primary auxiliary input assembly 20, a secondary auxiliary input assembly 50, and a third auxiliary input assembly 60 in sequence.

[0045] The tertiary auxiliary input sun gear of the tertiary auxiliary input assembly 60 drives the tertiary auxiliary input planetary gear to rotate and complete the speed reduction and torque increase. The tertiary auxiliary input planetary gear of the tertiary auxiliary input planetary gear rotates under the drive of the tertiary auxiliary input planetary gear, and the tertiary auxiliary input inner gear ring rotates and supports the tertiary auxiliary input planetary gear. The tertiary auxiliary input planetary gear carrier drives the secondary auxiliary input sun gear of the secondary auxiliary input assembly 50 to rotate. The secondary auxiliary input sun gear drives the secondary auxiliary input planetary gear to rotate and complete another speed reduction and torque increase. The secondary auxiliary input planetary gear carrier of the secondary auxiliary input planetary gear rotates under the drive of the secondary auxiliary input planetary gear, and the secondary auxiliary input inner gear ring rotates and supports the secondary auxiliary input planetary gear. The secondary auxiliary input planetary gear carrier of the secondary auxiliary input planetary gear drives the primary auxiliary input sun gear 21 of the primary auxiliary input assembly 20 to rotate. Finally, the primary auxiliary input sun gear 21 rotates to control the primary main input inner gear ring 13 to rotate. At this point, the aforementioned auxiliary input assembly plays the role of control force.

[0046] The primary main input sun gear 11 of the primary main input assembly 10 drives the primary main input planetary gear 12 to rotate. The primary main input inner gear 13 also drives the primary main input planetary gear 12 to rotate. The primary main input sun gear 11 and the primary main input inner gear 13 jointly determine the speed of the primary main input planetary gear 12.

[0047] The main input side also completes the speed reduction and torque increase in sequence. Specifically, the synthetic motion output shaft 1 drives the secondary main input sun gear of the secondary main input assembly 30 to rotate and complete the speed reduction and torque increase. The secondary auxiliary input planetary carrier of the secondary main input planetary gear rotates under the drive of the secondary auxiliary input planetary gear, and the secondary main input inner gear ring rotates and supports the secondary main input planetary gear. The secondary main input planetary carrier drives the tertiary main input sun gear of the tertiary main input assembly 40 to rotate, and the tertiary main input sun gear drives the tertiary main input planetary gear to rotate and complete another speed reduction and torque increase. The tertiary main input planetary gear rotates relative to the tertiary main input planetary gear of the tertiary main input planetary gear. The tertiary main input planetary carrier plays the role of supporting the roller 4. The tertiary main input inner gear ring of the tertiary main input assembly 40 rotates, and the tertiary main input inner gear ring is connected to the roller 4 and drives the roller 4 to rotate relative to the tertiary main input planetary carrier. The three-stage main input planet carrier is supported at one end of the drum 4, and the support structure 6 is supported at the other end of the drum support 5. The drum support 5 and the drum 4 rotate relative to the support structure 6. The drum 4 rotates and completes the lifting function under the support of the three-stage main input planet carrier and the support structure 6. The crane of this embodiment can control the stepless speed change as needed while ensuring the output torque.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A NGW continuously variable transmission, characterized in that: It includes a main input assembly and a secondary input assembly which are sequentially arranged along the axial direction; The main input assembly comprises a primary main input assembly (10), which comprises a primary main input sun gear (11), a plurality of primary main input planetary gears (12) meshing with the primary main input sun gear (11), and a primary main input inner gear ring (13) meshing with the primary main input planetary gears (12), the primary main input planetary gears (12) being fixed on a primary main input planetary carrier (14), and the primary main input planetary carrier (14) being connected to a synthetic motion output shaft (1); The auxiliary input assembly comprises a primary auxiliary input assembly (20), which comprises a primary auxiliary input sun gear (21), a plurality of primary auxiliary input planetary gears (22) meshing with the primary auxiliary input sun gear (21), and a primary auxiliary input inner gear ring (23) meshing with the primary auxiliary input planetary gears (22), the primary auxiliary input planetary gears (22) being fixed on a primary auxiliary input planet carrier (24), the primary main input inner gear ring (13) being fixed on a support frame (15), and the primary auxiliary input planet carrier (24) being fixedly connected to the support frame (15).

2. The NGW continuously variable transmission according to claim 1, characterized in that: The main input assembly and the auxiliary input assembly are both arranged in multiple stages, and the support frame (15) comprises an auxiliary input support frame (151) located on a side of the primary main input inner gear ring (13) directly facing the primary auxiliary input planetary frame (24) and a main input support frame (152) located on the other side of the primary main input inner gear ring (13); The multiple stages of the main input components are sequentially connected in series and are located on one side of the secondary input support frame (151), and the multiple stages of the secondary input components are sequentially connected in series and are located on the other side of the secondary input support frame (151).

3. The NGW continuously variable transmission according to claim 1 or 2, characterized in that: The number of the first-stage main input planetary gears (12) and the number of the first-stage auxiliary input planetary gears (22) are both set to three at intervals.

4. The NGW continuously variable transmission according to claim 1, characterized in that: A first-stage main input planetary shaft (121) is provided on the first-stage main input planetary wheel (12), and a first-stage main input planetary wheel bearing (16) is provided between the first-stage main input planetary shaft (121) and the first-stage main input planetary wheel (12); A first-stage auxiliary input planetary shaft (221) is provided on the first-stage auxiliary input planetary wheel (22), and a first-stage auxiliary input planetary wheel bearing (25) is provided between the first-stage auxiliary input planetary shaft (221) and the first-stage auxiliary input planetary wheel (22).

5. The NGW continuously variable transmission according to claim 1, characterized in that: The primary main input sun gear (11) is sleeved on the main input shaft (111), and the two are fixedly connected or integrally arranged; The primary auxiliary input sun gear (21) is sleeved on the auxiliary input shaft (211), and the two are fixedly connected or integrally arranged.

6. The NGW continuously variable transmission according to claim 5, characterized in that: The synthetic motion output shaft (1) is a hollow shaft and is sleeved at intervals on one side of the main input shaft (111).

7. The NGW continuously variable transmission according to claim 2, characterized in that: The first-stage auxiliary input internal gear ring (23) is arranged on an auxiliary input side bracket (26); a side of the auxiliary input side bracket (26) close to the first-stage main input internal gear ring (13) is connected to a main input side bracket (17); the main input support frame (152) and the main input side bracket (17) are connected via a first bearing (2); and the auxiliary input side bracket (26) and the first-stage auxiliary input planetary carrier (24) are connected via a second bearing (3).

8. A crane comprising the NGW continuously variable transmission according to any one of claims 1 to 7, characterized in that: It also comprises a roller (4), one side of the roller (4) being connected to the main input assembly and being driven by the main input assembly to rotate, and the other side of the roller (4) being connected to a roller support (5), and the roller support (5) being connected to a support structure (6) via a bearing.

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