Electro-hydraulic AMT oil way connecting device

Abstract

The utility model relates to the technical field of gearboxes, and provides an electro-hydraulic AMT (automated mechanical transmission) oil way connecting device which comprises an oil duct and a connecting pipeline, a sealing hole is formed in the oil duct, the connecting pipeline is inserted into the sealing hole and coaxially fixed with the sealing hole, a connector is fixed at the insertion end of the connecting pipeline, and a release bearing of the gearbox is fixed at the other end of the connecting pipeline; the outer side wall of the connecting joint is attached to the inner wall of the sealing hole, a plurality of sealing grooves are formed in the outer side wall of the connecting joint, a sealing ring matched with the sealing groove is embedded and fixed into each sealing groove, and the sealing rings are made of different materials. The utility model has the beneficial effects that the connecting pipeline and the connecting joint extend into the bottom of the sealing hole of the oil duct, so that the whole structure is more compact, and the connection in a narrow space is realized. The structure that a plurality of sealing rings are embedded into the connecting joint is adopted, and the sealing rings made of different materials are matched to deal with the high-pressure working condition; the auxiliary power for operation of the executing mechanism during gear shifting is improved, the gear shifting mechanism is suitable for a gearbox platform with larger loads, and the gear shifting stability is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of gearboxes, specifically to an electro-hydraulic AMT oil circuit connection device. Background Technology

[0002] As a key component of automotive power transmission, the traditional pneumatic shift AMT (Automated Manual Transmission) is no longer sufficient to meet market demands for AMTs with high load capacity and strong transmission power due to its complex structure, difficult maintenance, and insufficient power. Therefore, the simple, stable, and powerful hydraulic shift AMT is the main development direction in recent years and will continue to be so in the future.

[0003] However, existing hydraulic shift AMT transmissions still suffer from poor smoothness and slightly slow shifting speed because they rely on electronic systems to control clutch engagement and disengagement, as well as gear shifting. Utility Model Content

[0004] This invention proposes an electro-hydraulic AMT oil circuit connection device, which can provide greater oil circuit pressure to enable vehicles to achieve smooth and rapid gear shifting.

[0005] Therefore, the technical solution adopted is as follows:

[0006] An electro-hydraulic AMT oil circuit connection device includes an oil passage and a connecting pipe. A sealing hole is provided on the oil passage. The connecting pipe is inserted into the sealing hole and coaxially fixed thereto. A connecting joint is fixed at the insertion end of the connecting pipe, and the other end is fixed to the release bearing of the gearbox. The outer wall of the connecting joint is in contact with the inner wall of the sealing hole and has multiple sealing grooves along the axial direction. A matching sealing ring is embedded and fixed in each sealing groove, and each sealing ring is made of a different material.

[0007] A further technical solution is that the connecting pipe has an L-shaped structure, and the connecting joint extends deep into the bottom of the sealing hole.

[0008] A further technical solution includes a fixed flange, on which a fixing hole and a connecting hole are provided. The connecting pipe passes through the connecting hole and is fixed. The oil passage has a locking hole that matches the fixing hole. The fixing hole and the locking hole are locked together by a fixing bolt to fix the fixed flange and the oil passage.

[0009] A further technical solution is that the fixed end of the connecting pipe and the release bearing includes a locking nut, a locking sleeve is fixed inside the locking nut, the connecting pipe is inserted into the locking sleeve for fixation, and the locking nut is connected to a transition joint by a thread, the other end of the transition joint being threaded to the release bearing.

[0010] A further technical solution is that the connecting joint has two sealing grooves.

[0011] A further technical solution is that the connecting pipe and the connecting joint are fixed by welding.

[0012] A further technical solution is that the connecting pipe and the fixed flange are fixed by welding.

[0013] A further technical solution is that the fixing holes on the fixed flange and the locking holes on the oil passage are each provided in two sets.

[0014] The working principle and beneficial effects of this application are as follows:

[0015] 1. By extending the connecting pipes and connectors deep into the bottom of the sealing hole of the oil passage, the entire sealing structure is placed in the oil passage rather than at the oil passage inlet. The overall structure is more compact, enabling connection in narrow spaces and requiring less installation space. This further contributes to the optimization of clutch size and reduces the space occupied by the entire clutch housing.

[0016] 2. By employing a structure that embeds multiple sealing rings in the connecting joint and using sealing rings of different materials, it addresses the challenges of high-pressure operating conditions. The different materials of the sealing rings are used in a specified order, resolving the issue of the incompatibility between a single sealing ring's resistance to both media and low temperatures. Furthermore, the double-layer sealing rings improve the ability to intercept internal high-pressure media compared to a single-layer ring. The selection of different hardnesses for the sealing rings also enhances the product's high-pressure resistance, thus meeting the demands of high-pressure operating conditions. This also improves the power of the actuator's auxiliary operation during gear shifting, making it suitable for transmission platforms with higher loads and enhancing shifting stability.

[0017] 3. Compared with existing oil circuit connection devices, this device reduces the pipeline connections between various components, thereby reducing leakage channels and giving the release bearing greater installation flexibility. Attached Figure Description

[0018] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of this application;

[0020] Figure 2 This is a cross-sectional structural diagram of this application;

[0021] Figure 3 This is a cross-sectional view of the connecting pipeline described in this application;

[0022] Figure 4 This is a schematic diagram of the fixed flange described in this application;

[0023] Figure 5 This is a schematic diagram of the oil passage described in this application.

[0024] In the diagram: 1. Oil passage; 2. Connecting pipeline; 11. Sealing hole; 21. Connecting joint; 211. Sealing groove; 212. Sealing ring; 3. Fixed flange; 31. Fixed hole; 32. Connecting hole; 12. Locking hole; 4. Fixed bolt; 22. Locking nut; 221. Locking sleeve; 5. Transition joint. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0026] like Figures 1-5 As shown, an electro-hydraulic AMT oil circuit connection device includes an oil passage 1 and a connecting pipe 2. A sealing hole 11 is provided on the oil passage 1. The connecting pipe 2 is inserted into the sealing hole 11 and coaxially fixed thereto. A connecting connector 21 is fixed to the inserted end of the connecting pipe 2, and the other end is fixed to the release bearing of the gearbox. The outer wall of the connecting connector 21 is in contact with the inner wall of the sealing hole 11 and has multiple sealing grooves 211 formed along the axial direction. A matching sealing ring 212 is embedded and fixed inside each sealing groove 211, and each sealing ring 212 is made of a different material. The connecting pipe 2 has an L-shaped structure, and the connecting connector 21 extends to the bottom of the sealing hole 11.

[0027] Currently, the working principle of AMT (Automated Manual Transmission) in commercial vehicles is to collect signals such as engine speed and vehicle speed through the electronic control unit (ECU) to achieve optimal matching of engine fuel supply, clutch engagement and disengagement, and transmission shifting. This matching ensures that the vehicle can achieve smooth starting and rapid shifting under various operating conditions, thereby improving fuel economy and power performance.

[0028] This device places the entire sealing structure within the oil passage 1, rather than at its inlet, by extending the connecting pipe 2 and connector 21 deep into the bottom of the sealing hole 11 of the oil passage 1. This results in a more compact structure, enabling connection in confined spaces and reducing installation space. This further facilitates clutch size optimization and minimizes the space occupied by the entire clutch housing. Compared to existing oil passage connection devices, this device reduces pipe connections between components, thereby reducing leakage paths and providing greater installation flexibility for the release bearing.

[0029] Furthermore, by employing a structure in which multiple sealing rings 212 are embedded in the connecting joint 21, and by using sealing rings 212 of different materials, it can cope with high-pressure conditions of 50 Bar or even higher. The sealing rings 212 of different materials are used in a specified order, solving the problem that a single sealing ring 212 cannot simultaneously achieve both media resistance and low-temperature resistance. At the same time, compared with a single layer, the double-layer sealing ring 212 improves the ability to intercept internal high-pressure media, and the selection of different hardnesses for the sealing rings 212 also improves the product's own high-pressure resistance. This allows it to meet the needs of high-pressure conditions, improves the power of the actuator's auxiliary operation during gear shifting, is suitable for transmission platforms with larger loads, and improves shifting stability.

[0030] like Figure 4 The oil passage 1 and the connecting pipe 2 are fixedly connected by a fixed flange 3. The fixed flange 3 has a fixed hole 31 and a connecting hole 32. The connecting pipe 2 passes through the connecting hole 32 and is fixed. The oil passage 1 has a locking hole 12 that matches the fixed hole 31. The fixed hole 31 and the locking hole 12 are locked together by a fixing bolt 4 to fix the fixed flange 3 and the oil passage 1. The fixed hole 31 on the fixed flange 3 and the locking hole 12 on the oil passage 1 are each provided in two sets to ensure a more stable connection.

[0031] like Figure 2 As shown, the connecting pipe 2 is connected to the release bearing via a transition joint 5. The fixed end of the connecting pipe 2 and the release bearing includes a locking nut 22. A locking sleeve 221 is fixed inside the locking nut 22. The connecting pipe 2 is a steel pipe that is deformed and inserted into the locking sleeve 221 for fixation. The locking nut 22 is threadedly connected to a transition joint 5. The other end of the transition joint 5 is threadedly connected to the release bearing.

[0032] One embodiment of this application is that the connecting joint 21 has two sealing grooves 211. By adopting a structure in which two sealing rings 212 are embedded in the connecting joint 21, and by using sealing rings 212 of different materials, it is possible to cope with high pressure conditions of 50 Bar or even higher. Among them, the sealing rings 212 of different materials are used in combination in an actual specified order, which solves the problem that a single sealing ring 212 cannot simultaneously achieve media resistance and low temperature resistance. At the same time, compared with a single layer, the double-layer sealing ring 212 improves the ability to intercept internal high-pressure media, and the selection of different hardness of the sealing rings 212 also improves the product's own high pressure resistance.

[0033] One method of fixing the connecting pipe 2 to the connecting joint 21 and the fixed flange 3 is by welding.

[0034] The assembly steps of this application are as follows:

[0035] S1. Weld and fix the formed connecting pipe 2 to the connecting joint 21;

[0036] S2. Insert the connecting pipe 2 into the connecting hole 32 of the fixed flange 3 and secure it to the designated position using a special tooling. Then weld the two together to fix them.

[0037] S3. After deforming the connection end of the connecting pipe 2 and the transition joint 5, fix it in the locking sleeve 221 by using a special tooling.

[0038] S4. Assemble the grease-coated sealing rings 212 into the sealing grooves 211 of the connecting joint 21 in sequence, then insert the connecting joint 21 into the sealing hole 11 of the oil passage 1, and use the fixing bolts 4 to thread the fixing flange 3 and the oil passage 1 to complete the connection between the connecting pipe 2 and the oil passage 1.

[0039] S5. Tighten and fix the lock nut 22 to the transition joint 5 on the release bearing to complete the final assembly.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An electro-hydraulic AMT oil circuit connection device, characterized in that: It includes an oil passage (1) and a connecting pipe (2). The oil passage (1) has a sealing hole (11). The connecting pipe (2) is inserted into the sealing hole (11) and fixed coaxially therewith. The insertion end of the connecting pipe (2) is fixed with a connecting joint (21), and the other end is fixed to the release bearing of the gearbox. The outer wall of the connecting joint (21) is attached to the inner wall of the sealing hole (11) and a plurality of sealing grooves (211) are provided along the axial direction. A matching sealing ring (212) is embedded and fixed inside each sealing groove (211).

2. The electro-hydraulic AMT oil circuit connection device according to claim 1, characterized in that, The connecting pipe (2) has an L-shaped structure, and the connecting joint (21) extends into the bottom of the sealing hole (11).

3. The electro-hydraulic AMT oil circuit connection device according to claim 1, characterized in that, It also includes a fixed flange (3), which has a fixed hole (31) and a connecting hole (32). The connecting pipe (2) is inserted into the connecting hole (32) and fixed. The oil passage (1) has a locking hole (12) that matches the fixed hole (31). The fixed hole (31) and the locking hole (12) are locked together by a fixing bolt (4) to fix the fixed flange (3) and the oil passage (1).

4. The electro-hydraulic AMT oil circuit connection device according to claim 1, characterized in that, The connecting pipe (2) and the fixed end of the release bearing include a locking nut (22), and a locking sleeve (221) is fixed inside the locking nut (22). The connecting pipe (2) is inserted into the locking sleeve (221) and fixed. The locking nut (22) is connected to a transition joint (5) by a thread, and the other end of the transition joint (5) is threaded to the release bearing.

5. The electro-hydraulic AMT oil circuit connection device according to claim 1, characterized in that, The connector (21) has two sealing grooves (211), and each sealing ring (212) is made of a different material.

6. The electro-hydraulic AMT oil circuit connection device according to claim 1, characterized in that, The connecting pipe (2) and the connecting joint (21) are fixed by welding.

7. The electro-hydraulic AMT oil circuit connection device according to claim 3, characterized in that, The connecting pipe (2) and the fixed flange (3) are fixed by welding.

8. The electro-hydraulic AMT oil circuit connection device according to claim 3, characterized in that, The fixing holes (31) on the fixed flange (3) and the locking holes (12) on the oil passage (1) are each provided in two sets.

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