WO2018227778A1 - Gearbox shifting mechanism - Google Patents

Gearbox shifting mechanism Download PDF

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Publication number
WO2018227778A1
WO2018227778A1 PCT/CN2017/099937 CN2017099937W WO2018227778A1 WO 2018227778 A1 WO2018227778 A1 WO 2018227778A1 CN 2017099937 W CN2017099937 W CN 2017099937W WO 2018227778 A1 WO2018227778 A1 WO 2018227778A1
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Prior art keywords
gear set
intermediate shaft
shifting
intermediate gear
shaft
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PCT/CN2017/099937
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French (fr)
Chinese (zh)
Inventor
刘传进
潘卫国
任东
崔德友
徐新朋
缪申
刘志华
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南通国盛智能科技集团股份有限公司
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Publication of WO2018227778A1 publication Critical patent/WO2018227778A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/3023—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure

Definitions

  • the invention belongs to the field of gear shifting arrangements of gear boxes, and in particular relates to a gearbox shifting mechanism.
  • the conventional gearbox shifting mechanism is generally as follows: when shifting, the intermediate gear set is moved up and down on the spline shaft by the fork to realize gear shifting. During the transmission process, the spline shaft and the intermediate gear set are simultaneously rotated, and the spline shaft is rotated up and down. There are bearings to support the spline shaft, as shown in Figure 1.
  • the conventional structure requires the installation of a forklift device, the cylinder pushes the fork, and the fork pushes the intermediate gear set to move up and down on the intermediate support spline shaft to realize shifting, and the structure occupies a large space.
  • the large gear of the intermediate gear set is connected with the input gear, the spline in the gear set is matched with the outer spline of the intermediate shaft, and the intermediate shaft is equipped with bearings to support the intermediate gear set, the gear set pinion and the output gear. Connected to achieve the drive.
  • the internal spline and the external spline continuously collide to form a gap due to the impact load, and the gap is larger and larger.
  • the large gap brings noise and vibration when the gear set rotates.
  • the shifting force will bring a lateral component to the gear set, which will aggravate the wear between the inner and outer splines. High noise and vibration caused by high-speed rotation and load rotation.
  • the intermediate gear set and the intermediate shaft rotate at the same time to realize the transmission.
  • the mass of the rotating body itself is large, and there is more and more gap between the intermediate gear set and the intermediate shaft, and there is abnormal noise and vibration when rotating at high speed.
  • the maximum speed of the gearbox of the traditional mechanism can only reach 6000 rev / min.
  • the present invention provides a gearbox shifting mechanism.
  • a gearbox shifting mechanism including a shifting cylinder group, an intermediate shaft and an intermediate gear set
  • the piston and the intermediate shaft of the shifting cylinder group are integrated into one body.
  • the piston up and down of the shifting cylinder group drives the intermediate shaft and the intermediate gear set to move up and down as a whole to realize gear shifting, the intermediate gear set and the intermediate shaft No axial movement between them, no wear exists;
  • a bearing is mounted between the intermediate shaft and the intermediate gear set, and the intermediate gear set is supported on the intermediate shaft by bearings to realize a rotary motion of the intermediate gear set.
  • the intermediate gear set rotates, and the intermediate shaft only plays a supporting role. There is no direct wear between them.
  • the lower end of the intermediate shaft is supported by a wear-resistant copper sleeve.
  • the piston and the intermediate shaft of the shift cylinder group are integrated into one body, and the piston of the shift cylinder group drives the intermediate shaft and the intermediate gear group to move up and down as a whole to achieve gear shifting.
  • the intermediate shaft only plays a supporting role, and a bearing is installed between the intermediate gear set and the intermediate shaft to realize the rotary motion of the intermediate gear set.
  • the lower end of the intermediate shaft is supported by a wear-resistant copper sleeve.
  • the shifting cylinder and the intermediate shaft are combined into one, and no parts such as forks are required, and the gear shifting is directly performed by the piston up and down of the cylinder piston group, and the occupied space is small.
  • the footprint of the gear housing can be greatly reduced.
  • the mechanism drives the intermediate support shaft and the intermediate gear set to move up and down by the piston of the cylinder piston set to achieve gear switching, and there is no axial movement between the gear set and the intermediate shaft, and no wear exists.
  • the intermediate gear set is supported on the intermediate shaft by bearings, and there is no direct wear between them. Long-term use without wear, stable operation, noise and vibration values are basically stable.
  • the mechanism is more suitable for high speed gear transmission:
  • the transmission part of this structure is small in quality and there is no gap between the transmission parts.
  • the transmission process has low noise and small vibration, and it is easy to realize high-speed gear transmission. After actual testing, the noise and vibration values generated by the new mechanical gearbox at 10,000 rpm are comparable to the noise and vibration values produced by the conventional structural gearbox at 6000 rpm.
  • Figure 1 is a schematic view of a conventional structure of the present invention
  • Fig. 2 is a schematic view showing the structure of the present invention.
  • the piston of the shift cylinder group 1 and the intermediate shaft 2 are integrated into one body.
  • the up and down movement of the piston of the shift cylinder group 1 drives the intermediate shaft 2 and the intermediate gear set 3 to move up and down as a whole to realize gear shifting.
  • a bearing 4 is mounted between the intermediate shaft 2 and the intermediate gear set 3, and the intermediate gear set 3 is supported on the intermediate shaft 2 via a bearing 4 to realize a rotational movement of the intermediate gear set 3.
  • the intermediate shaft 2 only serves as a support and there is no direct wear between them.
  • the lower end of the intermediate shaft 2 is supported by a wear-resistant copper sleeve.
  • the structure of the invention is reasonable: the piston of the shifting cylinder group and the intermediate shaft are integrated into one body, and the piston of the shifting cylinder group drives the intermediate shaft and the intermediate gear set to move up and down as a whole to achieve gear shifting.
  • the intermediate shaft only plays a supporting role, and a bearing is installed between the intermediate gear set and the intermediate shaft to realize the rotary motion of the intermediate gear set.
  • the lower end of the intermediate shaft is supported by a wear-resistant copper sleeve.
  • the invention has the advantages of compact structure: the shifting cylinder and the intermediate shaft are combined into one, no need of parts such as forks, and the gear shifting is realized directly by the piston of the cylinder group up and down, and the occupied space is small.
  • the footprint of the gear housing can be greatly reduced.
  • the mechanism of the invention has little wear: the mechanism drives the intermediate shaft and the intermediate gear set to move up and down by the piston of the cylinder group to realize gear switching, and there is no axial movement between the gear set and the intermediate shaft, and no wear exists.
  • the intermediate gear set is supported on the intermediate shaft by bearings, and there is no direct wear between them. Long-term use without wear, stable operation, noise and vibration values are basically stable.
  • the mechanism of the invention is more suitable for high-speed gear transmission: only the intermediate gear set rotates when the mechanism gear is driven, and the intermediate shaft only plays a supporting role and does not participate in the rotary transmission.
  • the transmission part of this structure is small in quality and there is no gap between the transmission parts.
  • the transmission process has low noise and small vibration, and it is easy to realize high-speed gear transmission. After actual testing, the noise and vibration values generated by the new mechanical gearbox at 10,000 rpm are comparable to the noise and vibration values produced by the conventional structural gearbox at 6000 rpm.

Abstract

A gearbox shifting mechanism, comprising: a shifting oil cylinder set (1), an intermediate shaft (2) and an intermediate gear set (3); the piston of the shifting oil cylinder set (1) and the intermediate shaft (2) are integrated into one; when shifting gears, the piston of the shifting oil cylinder set (1) moves upward and downward, driving the intermediate shaft (2) and the intermediate gear set (3) to move upward and downward as a whole, thus shifting gears without axial movement between the intermediate gear set (3) and the intermediate shaft (2); a bearing (4) is installed between the intermediate shaft (2) and the intermediate gear set (3), the intermediate gear set (3) being supported on the intermediate shaft (2) by means of the bearing (4), thus achieving the rotational movement of the intermediate gear set (3). The gearbox shifting mechanism does not wear during operation, and operating conditions are stable, being more suitable for a gearbox working under the conditions of a high speed of rotation, long-time operation and frequent switching of gear positions.

Description

一种齿轮箱换档机构Gearbox shifting mechanism 技术领域Technical field
本发明属于齿轮箱的换档布置领域，具体涉及一种齿轮箱换档机构。The invention belongs to the field of gear shifting arrangements of gear boxes, and in particular relates to a gearbox shifting mechanism.
背景技术Background technique
传统的齿轮箱换档机构一般如下：换档时用拔叉带动中间齿轮组在花键轴上上下移动实现齿轮换档，传动过程中，花键轴和中间齿轮组同时旋转，花键轴上下均有轴承以支承花键轴，具体如图1所示。The conventional gearbox shifting mechanism is generally as follows: when shifting, the intermediate gear set is moved up and down on the spline shaft by the fork to realize gear shifting. During the transmission process, the spline shaft and the intermediate gear set are simultaneously rotated, and the spline shaft is rotated up and down. There are bearings to support the spline shaft, as shown in Figure 1.
传统结构需要安装拔叉装置，油缸推动拔叉，拔叉推动中间齿轮组在中间支承花键轴上上下移动，实现换档，此种结构占有空间较大。The conventional structure requires the installation of a forklift device, the cylinder pushes the fork, and the fork pushes the intermediate gear set to move up and down on the intermediate support spline shaft to realize shifting, and the structure occupies a large space.
传统机构传动时通过中间齿轮组的大齿与输入齿轮相联，齿轮组内花键与中间轴外花键配合，中间轴上下装有轴承以支承以中间齿轮组，齿轮组小齿轮与输出齿轮相联来实现传动。内外花键在长时间运行过程中，因为冲击载荷的存在导致内花键与外花键不断撞击形成间隙，且间隙越来越大。大的间隙带来齿轮组旋转时的噪音和振动。同时，因拔叉换档时会给齿轮组带来侧向分力，加剧内外花键之间的磨损。高速旋转和加负载旋转时带来较大的噪音和振动。In the conventional mechanism, the large gear of the intermediate gear set is connected with the input gear, the spline in the gear set is matched with the outer spline of the intermediate shaft, and the intermediate shaft is equipped with bearings to support the intermediate gear set, the gear set pinion and the output gear. Connected to achieve the drive. During the long-term operation of the internal and external splines, the internal spline and the external spline continuously collide to form a gap due to the impact load, and the gap is larger and larger. The large gap brings noise and vibration when the gear set rotates. At the same time, the shifting force will bring a lateral component to the gear set, which will aggravate the wear between the inner and outer splines. High noise and vibration caused by high-speed rotation and load rotation.
传统齿轮箱结构中中间齿轮组和中间轴同时旋转实现传动，本身旋转体质量大，中间齿轮组和中间轴之间存在越来越大的间隙，高速旋转时存在异响、振动问题。传统机构的齿轮箱最高转速只能达到6000转/分钟。In the traditional gearbox structure, the intermediate gear set and the intermediate shaft rotate at the same time to realize the transmission. The mass of the rotating body itself is large, and there is more and more gap between the intermediate gear set and the intermediate shaft, and there is abnormal noise and vibration when rotating at high speed. The maximum speed of the gearbox of the traditional mechanism can only reach 6000 rev / min.
发明内容Summary of the invention
发明目的：为了解决现有技术的不足，本发明提供了一种齿轮箱换档机构。OBJECT OF THE INVENTION: To solve the deficiencies of the prior art, the present invention provides a gearbox shifting mechanism.
技术方案：一种齿轮箱换档机构，包括换档油缸组、中间轴和中间齿轮组； Technical solution: a gearbox shifting mechanism, including a shifting cylinder group, an intermediate shaft and an intermediate gear set;
所述换档油缸组的活塞和中间轴合为一体，换档时，换档油缸组的活塞上下动作带动中间轴和中间齿轮组作整体上下运动，实现档位切换，中间齿轮组和中间轴之间无轴向移动，无磨损存在；The piston and the intermediate shaft of the shifting cylinder group are integrated into one body. When shifting, the piston up and down of the shifting cylinder group drives the intermediate shaft and the intermediate gear set to move up and down as a whole to realize gear shifting, the intermediate gear set and the intermediate shaft No axial movement between them, no wear exists;
所述中间轴与中间齿轮组之间安装有轴承，中间齿轮组通过轴承支承在中间轴上，实现中间齿轮组的旋转运动，传动过程中，仅中间齿轮组转动，中间轴仅起支承作用，相互之间无直接磨损。A bearing is mounted between the intermediate shaft and the intermediate gear set, and the intermediate gear set is supported on the intermediate shaft by bearings to realize a rotary motion of the intermediate gear set. During the transmission process, only the intermediate gear set rotates, and the intermediate shaft only plays a supporting role. There is no direct wear between them.
作为优化：所述中间轴下端用耐磨铜套支承。As an optimization: the lower end of the intermediate shaft is supported by a wear-resistant copper sleeve.
有益效果：本发明的具体优势如下：Advantageous Effects: The specific advantages of the present invention are as follows:
1、结构合理：1. Reasonable structure:
将换档油缸组的活塞和中间轴合为一体，换档时换档油缸组的活塞带动中间轴和中间齿轮组整体上下运动，以实现档位切换。传动过程中，仅齿轮组转动，中间轴仅起支承作用，中间齿轮组与中间轴之间安装有轴承，以实现中间齿轮组的旋转运动。中间轴下端用耐磨铜套支承。The piston and the intermediate shaft of the shift cylinder group are integrated into one body, and the piston of the shift cylinder group drives the intermediate shaft and the intermediate gear group to move up and down as a whole to achieve gear shifting. During the transmission process, only the gear set rotates, the intermediate shaft only plays a supporting role, and a bearing is installed between the intermediate gear set and the intermediate shaft to realize the rotary motion of the intermediate gear set. The lower end of the intermediate shaft is supported by a wear-resistant copper sleeve.
2、结构紧凑：2, compact structure:
将换档油缸与中间轴合二为一，无需拔叉等零件，直接通过油缸活塞组的活塞上下动作就实现齿轮换档，占有空间很小。可以大大缩小齿轮箱体的占据空间。The shifting cylinder and the intermediate shaft are combined into one, and no parts such as forks are required, and the gear shifting is directly performed by the piston up and down of the cylinder piston group, and the occupied space is small. The footprint of the gear housing can be greatly reduced.
3、机构磨损小：3, the mechanism wear is small:
机构通过油缸活塞组的活塞带动中间支承轴和中间齿轮组整体上下移动实现齿轮切换，齿轮组和中间轴之间无轴向移动，无磨损存在。传动时中间齿轮组通过轴承支承在中间轴上，相互之间不存在直接磨损。长时间使用无磨损，运行状况稳定，噪音和振动值基本稳定不变。The mechanism drives the intermediate support shaft and the intermediate gear set to move up and down by the piston of the cylinder piston set to achieve gear switching, and there is no axial movement between the gear set and the intermediate shaft, and no wear exists. In the transmission, the intermediate gear set is supported on the intermediate shaft by bearings, and there is no direct wear between them. Long-term use without wear, stable operation, noise and vibration values are basically stable.
4、机构更适用于高速齿轮传动： 4. The mechanism is more suitable for high speed gear transmission:
机构齿轮传动时仅中间齿轮组旋转，中间轴只起支承作用，不参与旋转传动。此结构传动部分质量小，传动部件间无间隙。传动过程噪音小、振动小，易实现高转速齿轮传动。经实际测试，新机构齿轮箱在达到10000转/分钟时产生的噪音和振动值与传统结构齿轮箱6000转/分钟时产生噪音和振动值相当。When the mechanism gear is driven, only the intermediate gear set rotates, and the intermediate shaft only plays a supporting role and does not participate in the rotary transmission. The transmission part of this structure is small in quality and there is no gap between the transmission parts. The transmission process has low noise and small vibration, and it is easy to realize high-speed gear transmission. After actual testing, the noise and vibration values generated by the new mechanical gearbox at 10,000 rpm are comparable to the noise and vibration values produced by the conventional structural gearbox at 6000 rpm.
附图说明DRAWINGS
图1是本发明的传统结构示意图；Figure 1 is a schematic view of a conventional structure of the present invention;
图2是本发明中的结构示意图。Fig. 2 is a schematic view showing the structure of the present invention.
具体实施方式detailed description
下面将对本发明实施例中的技术方案进行清楚、完整地描述，以使本领域的技术人员能够更好的理解本发明的优点和特征，从而对本发明的保护范围做出更为清楚的界定。本发明所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例，基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described in the following, so that those skilled in the art can better understand the advantages and features of the present invention, and the scope of the present invention is more clearly defined. The embodiments described herein are merely a part of the embodiments of the present invention, and not all of the embodiments, based on the embodiments of the present invention, all other implementations obtained by those skilled in the art without creative efforts. For example, all fall within the scope of protection of the present invention.
实施例Example
如图2所示，一种包括换档油缸组1、中间轴2和中间齿轮组3；As shown in Figure 2, a shift cylinder group 1, intermediate shaft 2 and intermediate gear set 3;
所述换档油缸组1的活塞和中间轴2合为一体，换档时，换档油缸组1的活塞上下动作带动中间轴2和中间齿轮组3作整体上下运动，实现档位切换，中间齿轮组3和中间轴2之间无轴向移动，无磨损存在；The piston of the shift cylinder group 1 and the intermediate shaft 2 are integrated into one body. When shifting, the up and down movement of the piston of the shift cylinder group 1 drives the intermediate shaft 2 and the intermediate gear set 3 to move up and down as a whole to realize gear shifting. There is no axial movement between the gear set 3 and the intermediate shaft 2, and there is no wear;
所述中间轴2与中间齿轮组3之间安装有轴承4，中间齿轮组3通过轴承4支承在中间轴2上，实现中间齿轮组3的旋转运动，传动过程中，仅中间齿轮组3转动，中间轴2仅起支承作用，相互之间无直接磨损。所述中间轴2下端用耐磨铜套支承。 A bearing 4 is mounted between the intermediate shaft 2 and the intermediate gear set 3, and the intermediate gear set 3 is supported on the intermediate shaft 2 via a bearing 4 to realize a rotational movement of the intermediate gear set 3. During the transmission, only the intermediate gear set 3 rotates. The intermediate shaft 2 only serves as a support and there is no direct wear between them. The lower end of the intermediate shaft 2 is supported by a wear-resistant copper sleeve.
本发明结构合理：将换档油缸组的活塞和中间轴合为一体，换档时换档油缸组的活塞带动中间轴和中间齿轮组整体上下运动，以实现档位切换。传动过程中，仅齿轮组转动，中间轴仅起支承作用，中间齿轮组与中间轴之间安装有轴承，以实现中间齿轮组的旋转运动。中间轴下端用耐磨铜套支承。The structure of the invention is reasonable: the piston of the shifting cylinder group and the intermediate shaft are integrated into one body, and the piston of the shifting cylinder group drives the intermediate shaft and the intermediate gear set to move up and down as a whole to achieve gear shifting. During the transmission process, only the gear set rotates, the intermediate shaft only plays a supporting role, and a bearing is installed between the intermediate gear set and the intermediate shaft to realize the rotary motion of the intermediate gear set. The lower end of the intermediate shaft is supported by a wear-resistant copper sleeve.
本发明结构紧凑：将换档油缸与中间轴合二为一，无需拔叉等零件，直接通过油缸组的活塞上下动作就实现齿轮换档，占有空间很小。可以大大缩小齿轮箱体的占据空间。The invention has the advantages of compact structure: the shifting cylinder and the intermediate shaft are combined into one, no need of parts such as forks, and the gear shifting is realized directly by the piston of the cylinder group up and down, and the occupied space is small. The footprint of the gear housing can be greatly reduced.
本发明机构磨损小：机构通过油缸组的活塞带动中间轴和中间齿轮组整体上下移动实现齿轮切换，齿轮组和中间轴之间无轴向移动，无磨损存在。传动时中间齿轮组通过轴承支承在中间轴上，相互之间不存在直接磨损。长时间使用无磨损，运行状况稳定，噪音和振动值基本稳定不变。The mechanism of the invention has little wear: the mechanism drives the intermediate shaft and the intermediate gear set to move up and down by the piston of the cylinder group to realize gear switching, and there is no axial movement between the gear set and the intermediate shaft, and no wear exists. In the transmission, the intermediate gear set is supported on the intermediate shaft by bearings, and there is no direct wear between them. Long-term use without wear, stable operation, noise and vibration values are basically stable.
本发明机构更适用于高速齿轮传动：机构齿轮传动时仅中间齿轮组旋转，中间轴只起支承作用，不参与旋转传动。此结构传动部分质量小，传动部件间无间隙。传动过程噪音小、振动小，易实现高转速齿轮传动。经实际测试，新机构齿轮箱在达到10000转/分钟时产生的噪音和振动值与传统结构齿轮箱6000转/分钟时产生噪音和振动值相当。 The mechanism of the invention is more suitable for high-speed gear transmission: only the intermediate gear set rotates when the mechanism gear is driven, and the intermediate shaft only plays a supporting role and does not participate in the rotary transmission. The transmission part of this structure is small in quality and there is no gap between the transmission parts. The transmission process has low noise and small vibration, and it is easy to realize high-speed gear transmission. After actual testing, the noise and vibration values generated by the new mechanical gearbox at 10,000 rpm are comparable to the noise and vibration values produced by the conventional structural gearbox at 6000 rpm.

Claims (2)

  1. 一种齿轮箱换档机构，其特征在于：包括换档油缸组、中间轴和中间齿轮组；A gearbox shifting mechanism, comprising: a shifting cylinder group, an intermediate shaft and an intermediate gear set;
    所述换档油缸组的活塞和中间轴合为一体，换档时，换档油缸组的活塞上下动作带动中间轴和中间齿轮组作整体上下运动，实现档位切换，中间齿轮组和中间轴之间无轴向移动，无磨损存在；The piston and the intermediate shaft of the shifting cylinder group are integrated into one body. When shifting, the piston up and down of the shifting cylinder group drives the intermediate shaft and the intermediate gear set to move up and down as a whole to realize gear shifting, the intermediate gear set and the intermediate shaft No axial movement between them, no wear exists;
    所述中间轴与中间齿轮组之间安装有轴承，中间齿轮组通过轴承支承在中间轴上，实现中间齿轮组的旋转运动，传动过程中，仅中间齿轮组转动，中间轴仅起支承作用，相互之间无直接磨损。A bearing is mounted between the intermediate shaft and the intermediate gear set, and the intermediate gear set is supported on the intermediate shaft by bearings to realize a rotary motion of the intermediate gear set. During the transmission process, only the intermediate gear set rotates, and the intermediate shaft only plays a supporting role. There is no direct wear between them.
  2. 根据权利要求1所述的齿轮箱换档机构，其特征在于：所述中间轴下端用耐磨铜套支承。 The gearbox shifting mechanism of claim 1 wherein said lower end of said intermediate shaft is supported by a wear resistant copper sleeve.
PCT/CN2017/099937 2017-06-12 2017-08-31 Gearbox shifting mechanism WO2018227778A1 (en)

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