2amt variable transmission assembly

Abstract

The utility model relates to a 2AMT gear assembly, a spline sleeve is sleeved on the main shaft, a first gear transmission gear and a second gear transmission gear are movably sleeved on the main shaft at the both sides of the spline sleeve, a first gear sleeve and a second gear sleeve are fixedly sleeved on the first gear transmission gear and the second gear transmission gear respectively, a sliding sleeve is sleeved on the spline sleeve, the external spline of the spline sleeve and the internal spline of the sliding sleeve are keyed, and when the sliding sleeve axially slides on the spline sleeve, the internal spline of the sliding sleeve can be keyed with the first gear connecting key of the first gear sleeve or the second gear connecting key of the second gear sleeve. The utility model relates to a 2AMT gear assembly, which is simple in structure, convenient to switch and has the lock gear function.

Description

Technical Field

[0001] This utility model relates to a 2AMT transmission assembly, belonging to the field of transmission technology. Background Technology

[0002] Currently, with the promotion of new energy technologies, electric vehicles are widely used in production, manufacturing, and agriculture. For general electric vehicles (non-four-wheeled vehicles), a two-speed transmission is sufficient for daily use. Our company has applied for Chinese Patent 2025201118292, "A Novel 2AMT Automatic Transmission," which uses a planetary gear mechanism for transmission and speed change, or, as in our Chinese Patent 2025206676219, "A Clutch and Transmission," which uses a friction plate assembly for transmission and speed change. However, in application, we have found a lack of a simpler, more convenient, and lockable two-speed automatic transmission mechanism for complex work environments requiring high torque. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a 2AMT transmission assembly with a simple structure, convenient switching and gear locking function, and a transmission method with higher transmission efficiency through mechanical key connection.

[0004] The purpose of this utility model is achieved as follows: A 2AMT transmission assembly includes a spline sleeve mounted on the main shaft. A first-gear and a second-gear transmission gear located on both sides of the spline sleeve are movably mounted on the main shaft. A first-gear sleeve and a second-gear sleeve are respectively fixedly mounted on the first-gear and second-gear transmission gears. A sliding sleeve is mounted on the spline sleeve, and the outer spline of the spline sleeve and the inner spline of the sliding sleeve are keyed together. When the sliding sleeve slides axially on the spline sleeve, the inner spline of the sliding sleeve can be keyed together with the first gear connecting key of the first gear sleeve or the second gear connecting key of the second gear sleeve.

[0005] Preferably, the sliding sleeve is driven by the shift fork to slide left and right along the spline sleeve. The outer wall of the sliding sleeve is provided with a shift groove with an annular structure. The shift fork is embedded in the shift groove. The shift fork rotates around a fixed axis. The shift head at the bottom of the shifting member is located in the shift groove at the top of the shift fork. The shifting member rotates around the central axis of the shifting shaft.

[0006] Preferably, the top of the actuating component has two ear plates vertically arranged, and the top of each ear plate has a groove. A sliding connector with protrusions on both sides of a horizontally sliding component rests in the two grooves.

[0007] Preferably, the sliding member is a screw and nut mechanism driven by a drive motor. The drive motor drives the screw that constitutes the sliding member to rotate, and the rotating screw drives the nut that rotates on it to move horizontally. A sliding connector is provided on the nut.

[0008] Preferably, one end of the actuating shaft is provided with a gear position sensor, and the other end of the actuating shaft is provided with a limiting groove with an annular structure, and a limiting member fixed on the housing is located in the limiting groove.

[0009] Preferably, three locking grooves are arranged parallel to each other on the shaft wall of the fixed shaft, and a locking hole is arranged vertically on the shift fork. The locking ball is located in the locking hole and its top part is embedded in the locking groove. The locking ball is pushed into the locking groove by the locking spring.

[0010] Preferably, the locking spring is located inside the locking hole, the bottom of the locking hole is plugged with a plug, and the locking spring is located between the plug and the locking ball.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model achieves the switching between first and second gear transmission gears by shifting the sliding sleeve with a shift fork. The overall structure is simple, the shifting efficiency is high, and the gear position is locked by a locking ball and spring, ensuring safety during use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a 2AMT transmission assembly according to the present invention.

[0013] Figure 2 and Figure 3 This is a cross-sectional view of a 2AMT transmission assembly according to the present invention.

[0014] Figure 4 This is a schematic diagram of the sliding sleeve in this utility model.

[0015] Figure 5 This is a partial cross-sectional view of the locking structure in this utility model.

[0016] in: 1. Main shaft, 2. Spline sleeve, 3. First gear transmission gear, 4. Second gear transmission gear, 5. First gear sleeve, 6. Second gear sleeve, 7. Sliding sleeve, 8. Shift fork, 9. Fixed shaft, 10. Actuating component, 11. Actuating shaft, 12. Sliding component, 13. Drive motor, 14. Limiting component, 15. Gear position sensor, 16. Locking ball, 17. Locking spring; Limiting sleeve 1.1, Limiting sleeve 2.2; External spline 2.1; Internal spline 7.1, shift groove 7.2; First gear connection key 5.1; Second gear connection key 6.1; 8.1 Shift fork component, 8.2 Shift groove, 8.3 Locking hole, 8.4 Plug; Locking slot 9.1; Toggle head 10.1, ear plate 10.2, groove 10.3; Limiting groove 11.1; Sliding connector 12.1. Detailed Implementation

[0017] See Figures 1-5 This utility model relates to a 2AMT transmission assembly, comprising a motor-driven spindle 1. The spindle 1 is fitted with a spline sleeve 2, which is fixed to the spindle 1 and rotates in a circular motion with the spindle 1. A first gear 3 and a second gear 4 are movably fitted on the spindle 1, and the first gear 3 and the second gear 4 are respectively located on both sides of the spline sleeve 2. When the spindle 1 rotates, the first gear 3 and the second gear 4 do not rotate with the spindle 1 (and the spindle 1 is also fitted with a limiting sleeve 1.1 and a limiting sleeve 1.2 next to the first gear 3 and the second gear 4 to limit the first gear 3 and the second gear 4 and prevent them from moving axially). A first gear sleeve 5 and a second gear sleeve 6 are respectively fixedly fitted on the first gear 3 and the second gear 4, and the first gear sleeve 5 and the second gear sleeve 6 are respectively located next to the spline sleeve 2.

[0018] A sliding sleeve 7 is fitted onto a spline sleeve 2, and the outer spline 2.1 of the spline sleeve 2 and the inner spline 7.1 of the sliding sleeve 7 are keyed together. This allows the rotation of the spline sleeve 2 to drive the rotation of the sliding sleeve 7, and the sliding sleeve 7 can move axially on the spline sleeve 2. When the sliding sleeve 7 moves to the right, the left side of the inner spline 7.1 of the sliding sleeve 7 remains keyed to the outer spline 2.1, and the right side of the inner spline 7.1 of the sliding sleeve 7 slides into the first gear connecting key 5.1 of the first gear sleeve 5 to achieve keying. At this time, the rotation of the main shaft 1 drives the spline sleeve 2 to rotate, and the spline sleeve 2 drives the first gear sleeve 5 to rotate under the connection of the sliding sleeve 7. The first gear transmission gear 3, which is fixedly connected to the first gear sleeve 5, is driven to rotate synchronously, thereby realizing first gear speed regulation. Similarly, when the sliding sleeve 7 moves to the left, it can realize the transmission of the second gear transmission gear 4, realizing second gear speed regulation.

[0019] The sliding sleeve 7 is driven by the shift fork 8 to move left and right. The outer wall of the sliding sleeve 7 is provided with a ring-shaped shift groove 7.2. The shift fork 8.1 of the shift fork 8 is embedded in the shift groove 7.2, and the shift fork 8 is movably connected to a fixed shaft 9. The upper part of the shift fork 8 is provided with a shift groove 8.2. The shift head 10.1 at the bottom of the shift member 10 is located in the shift groove 8.2, and the shift member 10 is fixedly mounted on the shift shaft 11. The two ends of the shift shaft 11 are respectively fixed to the assembly housing through bearings. The top of the shift member 10 is provided with two ear plates 10.2 vertically. The top of each ear plate 10.2 is provided with a groove 10.3. A sliding connector 12.1 with protrusions on both sides of a sliding member 12 rests in the two grooves 10.3.

[0020] When the sliding member 12 moves to the right, it drives the shift member 10 and the shift shaft 11 to rotate clockwise around the central axis of the shift shaft 11. At this time, the shift head 10.1 at the bottom of the shift member 10 pushes the shift fork 8 to move to the left, thereby realizing the second gear shifting operation; conversely, when the sliding member 12 moves to the left, the first gear shifting operation is realized.

[0021] The sliding member 12 is a screw and nut mechanism, which is driven by a drive motor 13. The drive motor 13 drives the screw that constitutes the sliding member 12 to rotate. The rotating screw drives the nut rotating on it to move horizontally. The sliding connector 12.1 is provided on the nut.

[0022] Meanwhile, a gear position sensor 15 is provided at one end of the shift shaft 11. The rotation direction of the shift shaft 11 is determined by the gear position sensor 15 (such as an angle sensor based on a Hall chip), which in turn determines the left and right movement direction of the shift fork 8, thus indicating the current gear position. The other end of the shift shaft 11 is provided with an annular limiting groove 11.1. A limiting member 14 fixed to the housing is located in the limiting groove 11.1, thereby preventing axial movement of the shift shaft 11 without affecting its rotation.

[0023] Meanwhile, in order to lock the gear after shifting, a locking mechanism is added to lock the gear when the shift fork 8 moves left or right. At this time, three locking grooves 9.1 are arranged parallel to each other on the shaft wall of the fixed shaft 9, and a locking hole 8.3 is arranged vertically on the shift fork 8. The locking ball 16 is located in the locking hole 8.3 and its top part is embedded in the locking groove 9.1. A locking spring 17 is embedded in the locking hole 8.3, and the top of the locking spring 17 abuts against the locking ball 16. The bottom of the locking hole 8.3 is blocked by a plug 8.4, and the locking spring 17 is located between the plug 8.4 and the locking ball 16. As the shift fork 8 moves left and right, it first causes the locking ball 16 to overcome the locking spring 17 and disengage from a certain locking groove 9.1. Then, the shift fork 8 moves left and right, causing the locking ball 16 to move. When shifting to first or second gear, the locking ball 16 located below a certain locking groove 9.1 on the left or right is inserted into the locking groove 9.1 by the elastic force of the locking spring 17. This prevents the shift fork 8 from shifting left and right due to vibration during vehicle operation, thus avoiding affecting the gear position.

[0024] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A 2AMT transmission assembly, characterized in that: A spline sleeve (2) is fitted on the main shaft (1). The first gear (3) and the second gear (4) located on both sides of the spline sleeve (2) are movably fitted on the main shaft (1). The first gear sleeve (5) and the second gear sleeve (6) are respectively fixedly fitted on the first gear sleeve (3) and the second gear sleeve (4). A sliding sleeve (7) is fitted on the spline sleeve (2). The outer spline (2.1) of the spline sleeve (2) and the inner spline (7.1) of the sliding sleeve (7) are keyed together. When the sliding sleeve (7) slides axially on the spline sleeve (2), the inner spline (7.1) of the sliding sleeve (7) can be keyed together with the first gear connecting key (5.1) of the first gear sleeve (5) or the second gear connecting key (6.1) of the second gear sleeve (6).

2. The 2AMT transmission assembly according to claim 1, characterized in that: The sliding sleeve (7) is driven by the shift fork (8) to slide left and right along the spline sleeve (2). The outer wall of the sliding sleeve (7) is provided with a shift groove (7.2) with an annular structure. The shift fork (8.1) of the shift fork (8) is embedded in the shift groove (7.2). The shift fork (8) rotates around the fixed shaft (9). The shift head (10.1) at the bottom of the shifting member (10) is located in the shift groove (8.2) at the top of the shift fork (8). The shifting member (10) rotates around the central axis of the shifting shaft (11).

3. The 2AMT transmission assembly according to claim 2, characterized in that: The top of the actuating member (10) is provided with two ear plates (10.2) vertically, and the top of each ear plate (10.2) is provided with a groove (10.3). The sliding connector (12.1) protruding on both sides of a horizontally sliding sliding member (12) rests in the two grooves (10.3).

4. The 2AMT transmission assembly according to claim 3, characterized in that: The sliding member (12) is a screw and nut mechanism, driven by a drive motor (13). The drive motor (13) drives the screw that constitutes the sliding member (12) to rotate. The rotating screw drives the nut on it to move horizontally. The sliding connector (12.1) is set on the nut.

5. The 2AMT transmission assembly according to claim 2, characterized in that: One end of the actuating shaft (11) is provided with a gear position sensor (15), and the other end of the actuating shaft (11) is provided with a ring-shaped limiting groove (11.1). A limiting member (14) fixed on the housing is located in the limiting groove (11.1).

6. The 2AMT transmission assembly according to claim 2, characterized in that: Three locking grooves (9.1) are arranged parallel to each other on the shaft wall of the fixed shaft (9). A locking hole (8.3) is arranged vertically on the shift fork (8). The locking ball (16) is located in the locking hole (8.3) and its top part is embedded in the locking groove (9.1). The locking ball (16) is pushed into the locking groove (9.1) by the locking spring (17).

7. The 2AMT transmission assembly according to claim 6, characterized in that: The locking spring (17) is located inside the locking hole (8.3), and the bottom of the locking hole (8.3) is blocked by a plug (8.4). The locking spring (17) is located between the plug (8.4) and the locking ball (16).

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