Clutch and gearbox
By setting an integrated transmission gear on the outer ring of the clutch hub and a symmetrical torque transmission structure in the inner cavity, the problems of complex structure and large space occupation of the gearbox clutch are solved, thus achieving simplified gearbox design and cost reduction.
Patent Information
- Application Number
- CN202520667621.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-04-10
AI Technical Summary
The gearboxes and clutches of existing agricultural machinery such as tractors have problems such as complex structure, many parts, large space occupation, and high cost.
A clutch structure comprising a shaft, a first gear, a clutch hub, and a second gear was designed. The structure features an integrated transmission gear on the outer ring of the clutch hub and a symmetrical torque transmission structure in the inner cavity. Torque transmission is achieved through a support frame and friction plate assembly, simplifying the structure and improving the commonality of components.
This simplifies the gearbox structure, reduces manufacturing costs, minimizes space requirements, simplifies assembly processes, and improves production efficiency.
Smart Images
Figure CN223781926U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a clutch and a gearbox, belonging to the field of agricultural machinery technology. Background Technology
[0002] Gearboxes are widely used in mechanical transmission mechanisms. By switching the engagement of different gears in a gear set, they achieve the purpose of changing different transmission ratios or switching input / output shafts. During the switching process of a gearbox, a clutch is typically used. Existing gearbox clutches in agricultural machinery such as tractors suffer from problems such as complex structure, numerous parts, complex assembly processes, and large space occupation, resulting in large gearbox size, complex structure, and high cost. Therefore, there is an urgent need for a gearbox clutch with a simple structure, modular design, high component commonality, low cost, and small space occupation. Summary of the Invention
[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a clutch and gearbox with simple structure, modular design, strong component commonality, low cost and small space occupation.
[0004] The purpose of this utility model is achieved as follows:
[0005] A clutch includes a shaft, a first gear, a clutch hub, and a second gear rotatably mounted on the shaft. The clutch hub is rotatably mounted on the shaft via a support frame connected to the center of its inner cavity. The support frame divides the inner cavity of the clutch hub into left and right parts. Two sets of symmetrical friction plates are respectively arranged between the inner cavities of the left and right sides of the clutch hub and the first and second gears. Two sets of pistons and springs are symmetrically arranged on the left and right sides of the support frame, respectively. The springs abut against the pistons. Transmission teeth are provided on the outer ring of the clutch hub.
[0006] Furthermore, the inner wall of the clutch hub is longitudinally provided with a keyway for embedding and installing the support frame and friction plate assembly.
[0007] Furthermore, the cross-section of the support frame is I-shaped and is rotatably mounted on the shaft via needle roller bearings.
[0008] Furthermore, an oil cavity is formed between the piston and the support frame, a through hole is provided on the support frame leading to the oil cavity, and an oil passage is provided inside the shaft that communicates with the through hole of the support frame.
[0009] Furthermore, the first gear is rotatably mounted on the shaft via a needle roller bearing and a bevel gear.
[0010] Furthermore, the second gear is rotatably mounted on the shaft via a tapered bearing.
[0011] A gearbox includes a plurality of clutches, each clutch being sequentially engaged and connected via transmission teeth on a clutch hub.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] The clutch of this utility model adopts an integrated transmission gear on the outer ring of the clutch hub and a symmetrical torque transmission structure in the inner cavity of the clutch hub. The overall structure is simple, the parts are highly interchangeable, and the production and assembly costs are low.
[0014] The gearbox of this invention connects each clutch module via an integrated transmission gear on the outer ring of the clutch hub, which can significantly reduce the volume occupied by the gearbox, further simplify the structure of the gearbox, reduce manufacturing costs, simplify assembly processes, and improve production efficiency. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a clutch according to the present invention.
[0016] Figure 2 This is a schematic diagram of the structure of a gearbox according to the present invention.
[0017] in:
[0018] Shaft 1, First gear 2, Clutch hub 3, Second gear 4, Support frame 5, Friction plate assembly 6, Piston 7, Spring 8, Transmission gear 9, Oil passage 10. Detailed Implementation Example 1
[0019] See Figure 1 This utility model relates to a clutch, comprising a shaft 1, a first gear 2, a clutch hub 3, and a second gear 4 rotatably mounted on the shaft 1; the first gear 2 is rotatably mounted on the shaft 1 via a needle roller bearing and a bevel gear; the second gear 4 is rotatably mounted on the shaft 1 via a bevel bearing; the outer ring of the clutch hub 3 is provided with transmission teeth 9, and the inner wall is provided with a keyway longitudinally; the outer ring of the support frame 5 is embedded in the keyway; the clutch hub 3 is rotatably mounted on the shaft 1 via the support frame 5 connected to the middle of its inner cavity; the support frame 5 is rotatably mounted on the shaft 1 via a needle roller bearing; the cross-section of the support frame 5 is I-shaped.
[0020] The support frame 5 divides the inner cavity of the clutch hub 3 into left and right parts. Two symmetrical sets of friction plate groups 6 are respectively arranged between the inner cavities of the left and right sides of the clutch hub 3 and the first gear 2 and the second gear 3. The friction plate groups 6 are embedded in the keyway. Two sets of pistons 7 and springs 8 are symmetrically arranged on the left and right sides of the support frame 5, with the springs 8 abutting against the pistons 7. An oil cavity is formed between the pistons 7 and the support frame 5. A through hole leading to the oil cavity is provided on the support frame 5. An oil passage 10 communicating with the through hole of the support frame 5 is provided inside the shaft 1. By injecting high-pressure oil into the oil passage 10, the pistons 7 are squeezed, causing the friction plate groups 6 to engage and transmit torque. When the left and right friction plate groups 6 engage simultaneously, power is transmitted from the first gear 2 to the clutch hub 3, and then from the clutch hub 3 to the second gear 4. When only the left friction plate group 6 engages, power is transmitted only from the first gear 2 to the clutch hub 3, and no longer to the second gear 4.
[0021] The clutch of this utility model adopts an integrated transmission gear 9 on the outer ring of the clutch hub 3 and a symmetrical torque transmission structure in the inner cavity of the clutch hub 3. The overall structure is simple, the parts are highly interchangeable, and the production and assembly costs are low. Example 2
[0022] See Figure 2 This utility model relates to a gearbox, which includes three sets of clutches as in Embodiment 1. Each clutch is sequentially connected by transmission teeth 9 on the clutch hub 3. Only one set of clutches is fully shown in the attached drawings, and only the clutch hubs of the other two clutches are shown. In other embodiments, two or more sets of clutches can be set according to the gear ratio requirements. Since the clutch modules are powered by the integrated transmission teeth 9 on the outer ring of the clutch hub 3, the volume occupied by the gearbox can be greatly reduced, which further simplifies the structure of the gearbox, reduces manufacturing costs, simplifies the assembly process, and improves production efficiency.
[0023] 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 clutch comprising a shaft (1), a first gear (2) rotatably mounted on the shaft (1), a clutch hub (3), and a second gear (4), characterized in that: The clutch hub (3) is rotatably mounted on the shaft (1) via a support frame (5) connected in the middle of its inner cavity. The support frame (5) divides the inner cavity of the clutch hub (3) into left and right parts. Two sets of friction plates (6) are respectively provided between the inner cavities of the left and right sides of the clutch hub (3) and the first gear (2) and the second gear (4). Two sets of pistons (7) and springs (8) are respectively symmetrically provided on the left and right sides of the support frame (5). The springs (8) abut against the pistons (7). Transmission teeth (9) are provided on the outer ring of the clutch hub (3).
2. The clutch according to claim 1, characterized in that: The inner wall of the clutch hub (3) is provided with a keyway in the longitudinal direction for mounting the support frame (5) and the friction plate assembly (6).
3. The clutch according to claim 1, characterized in that: The cross-section of the support frame (5) is "I" shaped and is rotatably mounted on the shaft (1) by a needle roller bearing.
4. The clutch according to claim 1, characterized in that: An oil cavity is formed between the piston (7) and the support frame (5). A through hole leading to the oil cavity is provided on the support frame (5). An oil passage (10) communicating with the through hole of the support frame (5) is provided inside the shaft (1).
5. The clutch according to claim 1, characterized in that: The first gear (2) is rotatably mounted on the shaft (1) via a needle roller bearing and a bevel gear.
6. The clutch according to claim 1, characterized in that: The second gear (4) is rotatably mounted on the shaft (1) via a tapered bearing.
7. A gearbox, characterized in that: It includes several sets of clutches according to any one of claims 1 to 6, and each clutch is connected by sequentially engaging transmission teeth (9) on the clutch hub (3).