阅读说明：本技术 一种自动变速液压换挡驱动装置 (Automatic speed-changing hydraulic gear-shifting driving device ) 是由 欧阳抗美 于 2018-08-31 设计创作，主要内容包括：本发明为商用汽车特别是城市客车电液控制机械自动变速器的一种自动变速液压换挡驱动装置。本发明能有效满足机械变速箱在紧凑空间自动换挡的可靠要求,本发明是一种适用于市场成熟的各种中大扭矩变速箱的自动换挡驱动装置。目前城市客车电液控制机械自动变速器用的换挡驱动装置,由于选挡过程位置变化,换挡油缸拨快上的换挡拨快轴由于是整体硬联接,受换挡拨叉换挡反作用力的作用,该作用力由于在换挡拨快轴上受力点距离远形成杠杆放大径向力,且受力点变化频繁,直接作用于换挡油缸活塞的杠杆径向外力不稳定且过大。长期在高强度城市公交环境运行,可靠性难保证,将造成油缸单面磨损漏油。(The invention relates to an automatic speed-changing hydraulic gear-shifting driving device of an electro-hydraulic control mechanical automatic transmission of a commercial automobile, in particular to a city bus. The invention can effectively meet the reliable requirement of automatic gear shifting of a mechanical gearbox in a compact space, and is an automatic gear shifting driving device suitable for various medium and large torque gearboxes with mature markets. At present, due to the position change of the gear selecting process, a gear shifting and shifting shaft on a gear shifting oil cylinder shifting speed is integrally and hard connected and is acted by a gear shifting and shifting fork gear shifting reaction force, the action force is a lever amplification radial force formed by the fact that the distance of a stress point on the gear shifting and shifting shaft is far, the stress point changes frequently, and the lever radial external force directly acting on a gear shifting oil cylinder piston is unstable and too large. The oil cylinder runs in a high-strength urban public traffic environment for a long time, reliability is difficult to guarantee, and single-side abrasion and oil leakage of the oil cylinder are caused.)

1. An automatic speed-changing hydraulic gear-shifting driving device. The gear shifting block and the gear shifting cylinder shifting block are respectively arranged at two ends of the cylinder shifting block by two rollers; and is flexibly connected with a concave groove of the gear shifting block. The shifting block frame is provided with the shifting block shifting guide shaft, so that the shifting block frame can be kept in effective contact with the shifting fork for selecting and shifting at each gear selecting position, and the shifting block frame is provided with the shifting block shifting guide shaft in the shifting fork for selecting and shifting.

2. An automatic speed-changing hydraulic gear-shifting driving device. The shifting block is radially positioned through a guide plate arranged on the shifting oil cylinder body.

3. An automatic speed-changing hydraulic gear-shifting driving device. An adjusting nut is added on a gear shifting cylinder hanging middle piston connected with the right end of a gear shifting cylinder shifting block to replace a fixed cylindrical step, and the adjusting nut can be finely adjusted to solve the problem of hanging middle positioning error.

4. An automatic speed-changing hydraulic gear-shifting driving device. The gear shifting frame provided with the gear shifting shaft is provided with a guide hole, the gear shifting guide shaft is arranged, and the gear shifting guide shaft is arranged on the gear shifting oil cylinder body.

Technical Field

The invention relates to an automatic speed-changing hydraulic gear-shifting driving device of an electro-hydraulic control mechanical automatic transmission of a commercial automobile, in particular to a city bus. The invention can effectively meet the reliable requirement of automatic gear shifting of a mechanical gearbox in a compact space, and is an automatic gear shifting driving device suitable for various medium and large torque gearboxes with mature markets.

Background

At present, due to the position change of the gear selecting process, a gear shifting and shifting shaft on a gear shifting oil cylinder shifting speed is integrally and hard connected and is acted by a gear shifting and shifting fork gear shifting reaction force, the action force is a lever amplification radial force formed by the fact that the distance of a stress point on the gear shifting and shifting shaft is far, the stress point changes frequently, and the lever radial external force directly acting on a gear shifting oil cylinder piston is unstable and too large. The oil cylinder runs in a high-strength urban public traffic environment for a long time, reliability is difficult to guarantee, and single-side abrasion and oil leakage of the oil cylinder are caused. In addition, the random change of the position error between the gear shifting cylinder in the gear shifting cylinder and the gear box in the gear shifting cylinder cannot be eliminated due to the fact that the spline starting angle of the gear shifting fork is not located. The control precision is inconsistent and the gear shifting reliability is difficult to guarantee. According to the invention, a guide hole is drilled on a gear shifting and shifting frame provided with a gear shifting and shifting shaft, the gear shifting and shifting frame is provided with a guide shaft, and a guide bearing is subjected to changed radial component force; meanwhile, the gear shifting block and the gear shifting oil cylinder shifting block are connected with a wedge-shaped groove of the gear shifting block through two rollers, and the action of the radial component force of the lever on the piston is isolated. Radial component force on the gear shifting block is effectively removed and acts on the piston through the gear shifting oil cylinder block, so that the inner wall of the oil cylinder is abraded on a single side, and the reliability of the oil cylinder is guaranteed. The shifting block is provided with the shifting and shifting fast shaft, so that the shifting and shifting fast shaft can be effectively contacted with the shifting and shifting fork at each gear selecting position, and the shifting and shifting fork is shifted. According to the invention, the adjusting nut is added at the right end of the shifting block of the gear shifting oil cylinder, and the position error in the hanging of the piston of the oil cylinder is solved by fine adjustment of the nut. Meanwhile, matching calibration of the hanging middle points of the gearbox and the automatic speed-changing hydraulic gear-shifting driving device can be conveniently met. The random variation of the position error in the suspension cannot eliminate the defect.

Disclosure of Invention

The invention aims to ensure that the lever directly acting on the gear shifting oil cylinder piston can amplify radial external force, can ensure reliable operation under the long-term high-strength urban public traffic environment operation, and ensures that the oil cylinder is not abraded on one side and leaks oil. According to the invention, a guide hole is drilled on a gear shifting and shifting frame provided with a gear shifting and shifting shaft, the gear shifting and shifting shaft is arranged on a gear shifting oil cylinder body, and a guide bearing is subjected to changed radial component force; meanwhile, the gear shifting block and the gear shifting oil cylinder shifting block are respectively arranged at two ends of the oil cylinder shifting block and flexibly connected with the wedge-shaped groove of the gear shifting block, and the action of radial component force of a lever on a piston only using one oil cylinder shifting block is isolated and removed. Radial component force on the gear shifting block is effectively removed and acts on the piston through the gear shifting oil cylinder block, so that the inner wall of the oil cylinder is abraded on a single side, and the reliability of the oil cylinder is guaranteed. The shifting block is provided with the shifting block shifting shaft, so that the shifting block can be effectively contacted with the shifting fork at each gear selecting position, and the shifting block shifting shaft is arranged in the shifting fork. The shifting block is radially positioned through a guide plate arranged on the shifting oil body. The invention aims to ensure that the random change of the position error between the gear shifting cylinder in the gear shifting cylinder and the gear box in the gear shifting box cannot be eliminated because the spline starting angle of the gear shifting fork is not positioned. The control precision is inconsistent and the gear shifting reliability is difficult to guarantee. According to the invention, the adjusting nut is added on the piston connected with the right end of the shifting block of the gear shifting oil cylinder to replace a fixed step, and the piston of the left oil cylinder pushes the adjusting nut rightwards to abut against a piston sleeve which is pressurized rightwards to position a middle hanging position. The calibration adjustment that the position in the oil cylinder piston hanger is consistent with the position in the gearbox hanger is solved by fine adjustment of the nut.

According to the invention, the two shifting blocks of the oil cylinder shifting block and the shifting block frame are flexibly combined and connected, so that radial component force on the shifting block is effectively removed and acts on the piston through the shifting block of the shifting oil cylinder, the inner wall of the oil cylinder is abraded on a single surface, and the oil leakage of the oil cylinder in operation and the reliable reliability of the system are ensured. Meanwhile, the adjusting nut is added on the piston connected with the right end of the shifting block of the gear shifting oil cylinder, and the position calibration error in the oil cylinder piston hanging position is solved by fine adjustment of the nut.

Drawings

FIG. 1 is a front view of the present invention

FIG. 2 is a right side view of the present invention

In fig. 1:

1. a gear shifting cylinder body; 2. a gearbox gear selecting and shifting shaft; 3. selecting a shifting fork; 4. a gear shifting shaft; 5. a shifting oil cylinder hangs a middle piston; 6. a shifting block of a shifting oil cylinder; 7. a shift cylinder left piston; 8. a gear shifting guide shaft; 9. a gear shifting frame; 10. adjusting the nut; 11. a roller; 12. a piston sleeve.

In fig. 2:

1. a gear shifting cylinder body; 2. a gearbox gear selecting and shifting shaft; 3. selecting a shifting fork; 4. a gear shifting shaft; 6. a shifting block of a shifting oil cylinder; 8. a gear shifting guide shaft; 9. the gear shifting is quick; 13. a guide plate.

Detailed description of the preferred embodiments

In fig. 1, fig. 2:

according to the invention, a guide hole is drilled on a gear shifting and shifting frame 9 provided with a gear shifting and shifting shaft 4, a gear shifting and shifting guide shaft 8 is arranged, the gear shifting and shifting guide shaft 8 is arranged on a gear shifting oil cylinder body 1, and the gear shifting and shifting guide shaft 8 bears the changed radial component force; meanwhile, the gear shifting block shifting frame 9 and the gear shifting oil cylinder shifting block 6 are respectively arranged at two ends of the oil cylinder shifting block 6 through two rollers 11 and are connected with a concave groove of the gear shifting block shifting frame 9, and the action of the radial component force of a lever on a left piston 7 of the gear shifting oil cylinder is isolated and removed. Radial component force on the gear shifting block 9 is effectively removed and acts on a left piston 7 of the gear shifting oil cylinder through the gear shifting oil cylinder block 6, so that the inner wall of the oil cylinder is abraded on a single side, and the reliability of the oil cylinder is guaranteed. The shifting block frame 9 is provided with a shifting block shifting guide shaft 8, each shifting block shifting position is guaranteed to be effectively contacted with a shifting fork 3, and the shifting block shifting guide shaft 8 is arranged in the shifting fork 3. The gear shifting and shifting frame 9 is positioned in the radial direction through a guide plate 13 arranged on the gear shifting oil cylinder body 1. According to the invention, the adjusting nut 10 is added on the shifting cylinder hanging piston 7 connected with the right end of the shifting cylinder shifting block 6 to replace a fixed cylindrical step, and the shifting cylinder left plug 7 pushes the adjusting nut 10 rightwards to abut against a piston sleeve 12 pressurized rightwards to position the hanging middle position. The calibration adjustment that the position in the oil cylinder piston hanger is consistent with the position in the gearbox hanger is solved by the fine adjustment of the adjusting nut 10.