A four-forward, two-reverse gearbox for engineering machinery

Abstract

This utility model discloses a four-forward, two-reverse gearbox for engineering machinery, comprising a gearbox body. Inside the gearbox body are installed parallel first clutch shaft, second clutch shaft, third clutch shaft, intermediate shaft, and output shaft. Hydraulic clutches are mounted on the first, second, and third clutch shafts, each with a working chamber. One end of the hydraulic clutch has a gear ring, and the other end has a disc gear. A first gear and a second gear are fixedly mounted on the intermediate shaft, and a first output gear and a second output gear are rotatably mounted on the output shaft. The first output gear meshes with the second gear, and the second output gear meshes with the first gear. A sliding sleeve is installed between the first and second output gears. This utility model uses three sets of small hydraulic clutches arranged axially in parallel to achieve four-forward, two-reverse, reducing axial space occupation and easily adapting to space-constrained engineering machinery.

Description

Technical Field

[0001] This utility model relates to a four-forward and two-reverse gearbox for engineering machinery, belonging to the field of transmission system technology. Background Technology

[0002] Currently, four-way forward and two-way reverse gearboxes used in construction machinery typically have fixed-shaft and planetary structures. Fixed-shaft gearboxes generally employ power shifting, using a hydraulic system to control the engagement and disengagement of the clutches to achieve gear switching. The gears within the gearbox are usually in constant mesh. During gear shifting, the corresponding clutch friction plates engage under hydraulic pressure, and power is transmitted to the output shaft through different gear combinations to achieve different transmission ratios.

[0003] Traditional fixed-shaft four-forward two-reverse transmissions rely on two sets of large clutches to achieve power switching. Each set of large clutches has two working chambers, which occupy a large axial space, resulting in a bulky transmission. Sometimes it is difficult to adapt to space-constrained construction machinery, such as small loaders and forklifts.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] To address the shortcomings of the prior art, this utility model provides a four-forward, two-reverse gearbox for engineering machinery. It employs three sets of small hydraulic clutches arranged axially in parallel to achieve four-forward and two-reverse, which can reduce the axial space occupied and is easily adapted to engineering machinery with limited space.

[0006] To solve the above technical problems, the present invention adopts the following technical solution:

[0007] A four-forward, two-reverse gearbox for engineering machinery includes a gearbox body. Inside the gearbox body are a first clutch shaft, a second clutch shaft, a third clutch shaft, an intermediate shaft, and an output shaft arranged in parallel. Hydraulic clutches are installed on the first clutch shaft, the second clutch shaft, and the third clutch shaft. Each hydraulic clutch has a working chamber, a gear ring at one end, and a disc hub gear at the other end.

[0008] Furthermore, the first clutch shaft, the second clutch shaft, the third clutch shaft, the intermediate shaft, and the output shaft are all rotatably mounted in the gearbox body.

[0009] Furthermore, a first gear ring is provided at one end of the hydraulic clutch on the first clutch shaft, and a first disc hub gear is provided at the other end of the hydraulic clutch.

[0010] Furthermore, one end of the hydraulic clutch on the second clutch shaft is provided with a second gear ring, which meshes with the first gear ring for transmission, and the other end of the hydraulic clutch is provided with a second disc hub gear.

[0011] Furthermore, one end of the hydraulic clutch on the third clutch shaft is provided with a third gear ring, which meshes with the second gear ring for transmission. The other end of the hydraulic clutch is provided with a disc gear and a third disc hub gear, which mesh with the first disc hub gear and the second disc hub gear for transmission.

[0012] Furthermore, a first gear and a second gear are fixedly mounted on the intermediate shaft, and the first gear meshes with a third disc hub gear for transmission.

[0013] Furthermore, a first output gear and a second output gear are rotatably mounted on the output shaft. The first output gear meshes with the second gear for transmission, and the second output gear meshes with the first gear for transmission.

[0014] Furthermore, a sliding sleeve is installed between the first output gear and the second output gear. The sliding sleeve is connected to a shift fork mechanism, which drives the sliding sleeve to move left and right along the output shaft.

[0015] Furthermore, output flanges are provided at both ends of the output shaft.

[0016] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0017] This utility model adopts a fixed-shaft structure as a whole. Hydraulic clutches with a working chamber are installed on the first clutch shaft, the second clutch shaft and the third clutch shaft to realize the switching of four forward and two reverse gears by a fully hydraulic clutch.

[0018] By employing three sets of small hydraulic clutches arranged axially in parallel to achieve four-way forward and two-way reverse, the axial space occupied can be reduced, the internal space requirement of the housing can be decreased, and it can be easily adapted to engineering machinery with limited space.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram, 1-first gear ring, 2-first disc hub gear, 3-second gear ring, 4-second disc hub gear, 5-third gear ring, 6-disc gear, 7-third disc hub gear, 8-first gear, 9-second gear, 10-first output gear, 11-second output gear, 12-gearbox housing, 13-first clutch shaft, 14-second clutch shaft, 15-third clutch shaft, 16-intermediate shaft, 17-output shaft, 18-sliding sleeve, 19-output flange. Detailed Implementation

[0022] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0023] like Figure 1 As shown, this utility model provides a four-forward, two-reverse gearbox for engineering machinery, including a gearbox body 12. Inside the gearbox body 12, a first clutch shaft 13, a second clutch shaft 14, a third clutch shaft 15, an intermediate shaft 16, and an output shaft 17 are installed in parallel. The first clutch shaft 13, the second clutch shaft 14, the third clutch shaft 15, the intermediate shaft 16, and the output shaft 17 are all rotatably mounted inside the gearbox body 12. A hydraulic clutch with a working chamber is installed on the first clutch shaft 13, the second clutch shaft 14, and the third clutch shaft 15.

[0024] The first clutch shaft 13 is used to introduce engine power into the gearbox body 12. One end of the hydraulic clutch on the first clutch shaft 13 is provided with a first gear ring 1, and the other end of the hydraulic clutch is provided with a first disc hub gear 2.

[0025] The second clutch shaft 14 has a second gear ring 3 at one end of the hydraulic clutch, which meshes with the first gear ring 1 for transmission, and a second disc hub gear 4 at the other end of the hydraulic clutch.

[0026] The hydraulic clutch on the third clutch shaft 15 has a third gear ring 5 at one end, which meshes with the second gear ring 3 for transmission. The other end of the hydraulic clutch has a disc gear 6 and a third disc hub gear 7, which mesh with the first disc hub gear 2 and the second disc hub gear 4 for transmission.

[0027] The intermediate shaft 16 is fixedly mounted with a first gear 8 and a second gear 9, and the first gear 8 meshes with the third disc hub gear 7 for transmission.

[0028] The first output gear 10 and the second output gear 11 are rotatably mounted on the output shaft 17. The first output gear 10 meshes with the second gear 9 for transmission, and the second output gear 11 meshes with the first gear 8 for transmission.

[0029] A sliding sleeve 18 is installed between the first output gear 10 and the second output gear 11. The sliding sleeve 18 is connected to a shift fork mechanism, which can drive the sliding sleeve 18 to move left and right along the output shaft 17. When the sliding sleeve 18 moves to the left, the first output gear 10 drives the output shaft 17 to rotate. When the sliding sleeve 18 moves to the right, the second output gear 11 drives the output shaft 17 to rotate, thereby realizing high and low speed switching.

[0030] Output flanges 19 are provided at both ends of the output shaft 17.

[0031] The power transmission route of this utility model is as follows:

[0032] Forward 1st gear: First gear ring 1 → Second gear ring 3 → Second disc hub gear 4 → Disc gear 6 → Third disc hub gear 7 → First gear 8 → Second output gear 11 → Output flange 19;

[0033] Forward 2 gears: First gear ring 1 → Second gear ring 3 → Second disc hub gear 4 → Disc gear 6 → Third disc hub gear 7 → First gear 8 → Second gear 9 → First output gear 10 → Output flange 19;

[0034] Forward 3rd gear: First gear ring 1 → Second gear ring 3 → Third gear ring 5 → Third disc hub gear 7 → First gear 8 → Second output gear 11 → Output flange 19;

[0035] Forward 4th gear: First gear ring 1 → Second gear ring 3 → Third gear ring 5 → Third disc hub gear 7 → First gear 8 → Second gear 9 → First output gear 10 → Output flange 19;

[0036] Reverse gear 1: First gear ring 1 → First disc hub gear 2 → Disc gear 6 → Third disc hub gear 7 → First gear 8 → Second output gear 11 → Output flange 19;

[0037] Reverse 2 gears: First gear ring 1 → First disc hub gear 2 → Disc gear 6 → Third disc hub gear 7 → First gear 8 → Second gear 9 → First output gear 10 → Output flange 19.

[0038] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A four-in-two-out gearbox for a construction machine, characterized by: The gearbox includes a gearbox housing (12), inside which are installed parallel first clutch shaft (13), second clutch shaft (14), third clutch shaft (15), intermediate shaft (16) and output shaft (17). Hydraulic clutches are installed on the first clutch shaft (13), second clutch shaft (14) and third clutch shaft (15). Each hydraulic clutch has a working chamber, and one end of the hydraulic clutch is provided with a gear ring and the other end is provided with a disc hub gear.

2. A four forward and two reverse transmission for a working machine as set forth in claim 1, wherein: The first clutch shaft (13), the second clutch shaft (14), the third clutch shaft (15), the intermediate shaft (16), and the output shaft (17) are all rotatably mounted in the gearbox body (12).

3. A four forward and two reverse transmission for a construction machine as set forth in claim 1, wherein: The first clutch shaft (13) has a first gear ring (1) at one end of the hydraulic clutch and a first disc hub gear (2) at the other end of the hydraulic clutch.

4. A four forward and two reverse transmission for a working machine as set forth in claim 3, wherein: The second clutch shaft (14) has a second gear ring (3) at one end of the hydraulic clutch, which meshes with the first gear ring (1) for transmission, and a second disc hub gear (4) at the other end of the hydraulic clutch.

5. A four forward and two reverse transmission for a working machine as set forth in claim 4, wherein: The hydraulic clutch on the third clutch shaft (15) is provided with a third gear ring (5) at one end, which meshes with the second gear ring (3) for transmission. The other end of the hydraulic clutch is provided with a disc gear (6) and a third disc hub gear (7), which mesh with the first disc hub gear (2) and the second disc hub gear (4) for transmission.

6. A four forward and two reverse transmission for a working machine as set forth in claim 5, wherein: The intermediate shaft (16) is fixedly mounted with a first gear (8) and a second gear (9), and the first gear (8) meshes with the third disc hub gear (7) for transmission.

7. A four forward and two reverse transmission for a construction machine as set forth in claim 6, wherein: The first output gear (10) and the second output gear (11) are rotatably mounted on the output shaft (17). The first output gear (10) meshes with the second gear (9) for transmission, and the second output gear (11) meshes with the first gear (8) for transmission.

8. A four forward and two reverse transmission for a working machine as set forth in claim 7, wherein: A sliding sleeve (18) is installed between the first output gear (10) and the second output gear (11). The sliding sleeve (18) is connected to the shift fork mechanism, which drives the sliding sleeve (18) to move left and right along the output shaft (17).

9. A four forward and two reverse transmission for a construction machine as set forth in claim 1, wherein: Output flanges (19) are provided at both ends of the output shaft (17).

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