Piston clutch structure and gearbox

Abstract

The utility model discloses a piston clutch structure and a gearbox in the technical field of engineering machinery or agricultural machinery gearboxes, the structure comprises a clutch hub gear, a piston, a baffle, a clutch shaft, a friction plate group and a spring, the piston is connected with the clutch hub gear and the clutch shaft, one end of the spring is connected with the baffle, and the other end of the spring is connected with the friction plate group. An inner spline and an outer spline in the friction plate group are respectively meshed with the gear and the clutch hub gear; when the clutch is filled with oil, pressure oil passes through the oil duct on the clutch shaft to push the piston to be connected with the baffle, and then the spring and the friction plate set are pressed, so that the gear is connected with the clutch hub gear and the clutch shaft to output torque. When the clutch drains oil, pressure oil flows back to the oil tank through the oil duct, the spring pushes the baffle and the piston to return to the initial position, then the friction plates in the friction plate set are separated from the polished plates, and power output is cut off. According to the utility model, smooth and rapid joint in the gear shifting process can be realized, and the gear shifting impact is small.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of piston clutch structure and gearbox, belong to engineering machinery or agricultural machinery gearbox technical field. BACKGROUND

[0002] In this traditional structure, clutch includes clutch outer hub, clutch shaft, output gear, friction plate group, piston and multiple parts. These components work together to achieve power transmission and cut-off. In this traditional design, the clutch piston is usually an integral component, which is connected with the clutch outer hub and the clutch shaft, and the upper end surface is connected with the friction plate group and the spring. The main disadvantage of this design is that the engagement is not smooth enough, and there is a large impact when shifting gears. Not only does this affect the driving experience, but it can also cause additional wear and damage to mechanical components. SUMMARY

[0003] The utility model aims at overcoming the deficiencies in the prior art, and provides a piston clutch structure and gearbox that can solve the problem of insufficient smoothness and large impact when shifting gears in existing gearboxes.

[0004] To solve the above technical problems, the utility model is implemented by using the following technical scheme:

[0005] On the one hand, a piston clutch structure includes a clutch hub gear, a piston, a baffle, a clutch shaft, a friction plate group, and a spring. The piston is connected to the clutch hub gear and the clutch shaft. One end of the spring is connected to the baffle, and the other end is installed on the clutch shaft. The inner and outer splines in the friction plate group are connected to the gear and the clutch hub and the friction plate group, respectively. The gear is connected to the clutch hub gear and the clutch shaft to output torque.

[0006] When the clutch leaks oil, the pressure oil flows back to the oil tank through the oil channel on the clutch shaft, causing the spring to push the baffle and piston back to the initial position. The friction plates in the friction plate group are separated from the smooth plates, and the power output is cut off.

[0007] Preferably, the clutch hub gear is fixed to the clutch shaft by a snap spring.

[0008] Preferably, the piston is supported on the clutch shaft, and the piston is sealed with the clutch shaft by a sealing ring and an O-ring, respectively.

[0009] Preferably, the sealing ring and the O-ring are coated with a layer of lubricating grease on their surfaces.

[0010] Preferably, the sealing ring is made of alloy cast iron.

[0011] Preferably, the outer end of the friction plate set is equipped with a pressure plate, which is engaged with the clutch hub gear through inner and outer splines.

[0012] Preferably, the outer end of the friction plate set is further equipped with a check ring for limiting the position of the friction plate set, which is installed on the clutch hub gear.

[0013] Preferably, the baffle is supported by the piston, and the clutch hub gear, clutch shaft and gear are fixed by the check ring.

[0014] Preferably, the gear is fixed on the clutch shaft through a bearing.

[0015] In another aspect, a gearbox comprises the clutch structure of any one of the first aspect.

[0016] Compared with the prior art, the piston clutch structure provided by the present application has the following beneficial effects:

[0017] The piston clutch structure described in the present application mainly reflects the following aspects:

[0018] Structural optimization: by connecting the piston with the clutch hub gear and the clutch shaft, and connecting one end of the spring with the baffle through the spring guide ring and connecting the other end of the spring with the clutch shaft, the structural layout inside the clutch is optimized, and the compactness and efficiency of the clutch are improved.

[0019] Smooth gear shifting: when the clutch is filled with oil, the pressure oil pushes the piston to engage with the baffle, compresses the spring and the friction plate set, and connects the gear with the clutch shaft to realize power transmission. When the oil is discharged, the spring pushes the baffle and the piston back to the initial position, so that the friction plate is separated from the smooth plate, and the power output is cut off. This process makes the gear shifting action more smooth, reduces the gear shifting impact, and improves the driving comfort.

[0020] Rapid response: the design of the clutch structure makes the oil filling and discharging process rapid, thereby accelerating the response speed of the clutch and improving the efficiency of power transmission.

[0021] Improved reliability: the inner and outer splines in the friction plate set are engaged with the gear and the clutch hub gear respectively, which enhances the stability and reliability of torque transmission, and ensures the continuity and reliability of power transmission.

[0022] Strong adaptability: the piston clutch structure is suitable for gearboxes and has wide adaptability, and can be applied to various different gearbox configurations. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic view of the piston clutch structure provided by the present application;

[0024] In the figure: 1, clutch hub gear; 2, plug; 3, sealing ring; 4, O-ring; 5, piston; 6, baffle; 7, clutch shaft; 8, baffle ring; 9, pressure plate; 10, friction plate group; 11, gear; 12, spring; 13, bearing. DETAILED DESCRIPTION

[0025] The utility model will be described further below in conjunction with the drawings. The following examples are only for more clearly illustrating the technical scheme of the utility model, and cannot be used to limit the protection scope of the utility model.

[0026] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0027] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances. Example 1

[0028] Referring to Figure 1 The utility model introduces a kind of piston clutch structure, including clutch hub gear 1, piston 5, baffle 6, clutch shaft 7, friction plate group 10 and spring 12. Piston 5 is connected with clutch hub gear 1 and clutch shaft 7, and one end of spring 12 is connected with baffle 6 by spring guide ring, the other end is limited by snap spring guide ring, and is assembled and fixed on clutch shaft 7, and the inner and outer spline of friction plate group 10 are engaged with gear 11 and clutch hub gear 1 respectively, to ensure the effective transmission of power.

[0029] During the oil filling process of the clutch, the pressure oil enters the cavity between the piston 5 and the clutch shaft 7 through the oil channel on the clutch shaft 7 to push the piston 5 to engage with the baffle 6, thereby compressing the spring 12 and the friction plate set 10. This action connects the gear 11 with the clutch hub gear 1 and the clutch shaft 7 to realize power transmission, and at this time the gear 11 outputs torque. Conversely, during the oil discharge of the clutch, the pressure oil flows back to the oil tank through the oil channel on the clutch shaft 7, so that the spring 12 pushes the baffle 6 and the piston back to their initial positions, thereby causing the friction plates in the friction plate set 10 to separate from the smooth plates, thereby cutting off the power output.

[0030] Compared with the traditional gearbox clutch, the piston clutch structure in the present application provides a smoother and faster shifting process and smaller shifting impact. By splitting the complex piston structure, the machining process is simplified. At the same time, the diameter and thickness of the friction pair are appropriately increased, and carbon paper base material is used, which effectively improves the torque capacity, improves the heat capacity and heat dissipation capacity of the friction pair, thereby prolonging the service life of the clutch itself. Example 2

[0031] According to the piston clutch structure of example 1, the connection and assembly method of each component is further refined. The clutch hub gear 1 is fixed on the clutch shaft 7 by a snap spring (the clutch shaft 7 and the clutch hub gear 1 can be regarded as a whole), and the plug 2 for closing or protecting the end of the clutch shaft 7 is installed on the clutch shaft 7, which ensures the stable connection between the clutch hub gear 1 and the clutch shaft 7. The piston 5 is supported on the clutch shaft 7 and sealed with the clutch shaft 7 through the sealing ring 3 and the O-ring 4 to prevent oil leakage. In order to reduce friction and wear, and at the same time help sealing, the sealing ring 3, the O-ring 4 and the surface of the piston 5 are also coated with a layer of lubricating grease.

[0032] Further, the outer end of the friction plate set 10 is equipped with a check ring 8 and a pressure bearing plate 9, and the pressure bearing plate 9 is engaged with the clutch hub gear 1 through the internal and external splines in it, which enhances the stability of the structure and the torque transmission capacity and is limited by the check ring 8 installed on the clutch hub gear 1, further ensuring the correct installation and positioning of the pressure bearing plate.

[0033] Further, the baffle 6 is supported on the piston 5 and moves with the piston 5, so that the baffle 6 can move synchronously with the action of the piston 5, thereby effectively controlling the pressure of the friction plate set 10, and the baffle 6 fixes the clutch hub gear 1, the clutch shaft 7 and the gear 11 together through the check ring 8.

[0034] Further, the gear 11 is fixed to the clutch shaft 7 through the bearing 13, and the function of the bearing 13 is to support the gear 11 and allow it to rotate freely on the clutch shaft, reducing friction. Example 3

[0035] The assembly process of the piston clutch structure introduced in the utility model comprises:

[0036] a. The plug 2 is installed into the clutch shaft 7 to seal or protect the end of the clutch shaft;

[0037] b. The piston 5 is installed into the sealing ring 3 and the O-ring 4, which are sealing elements used to seal the gap between the piston 5 and the clutch shaft 7 to prevent oil leakage. Lubricating grease is applied to the oil sealing surface of the sealing ring 3 and the O-ring 4 to reduce friction and wear and tear and help sealing. Then, the piston assembly coated with lubricating grease is assembled onto the clutch shaft 7;

[0038] c. The baffle 6 is installed on the piston 5 and moves together with the piston 5. The spring 12 is installed into the clutch shaft 7 and is limited by the spring guide ring, the retainer ring 8, the snap spring guide ring and other parts to ensure that the spring 12 is correctly installed on the clutch shaft 7;

[0039] d. The baffle 6 fixes the clutch hub gear 1, the clutch shaft 7 and the gear 11 together through the retainer ring 8 to maintain their relative positions during operation;

[0040] e. The friction plate set 10, the pressure plate 9 and the retainer ring 8 located at the outer end of the friction plate set 10 are assembled in sequence.

[0041] f. The gear 11 is assembled and fixed on the clutch shaft 7 through the bearing 13, which supports the gear 11 and allows it to rotate on the clutch shaft.

[0042] Such an assembly sequence ensures that each component of the clutch can be correctly installed and work cooperatively to achieve effective power transmission and separation. Embodiment 4

[0043] A gearbox comprising the clutch structure described in Embodiments 1 to 3.

[0044] In summary, the working principle of the piston clutch structure of the utility model involves the engagement and separation of power, which is realized through the oil filling and oil draining processes.

[0045] When the clutch is filled with oil, the pressure oil enters the cavity between the piston 5 and the clutch shaft 7 through the oil channel on the clutch shaft 7. This pre-filling step ensures that the oil can smoothly fill the cavity. Subsequently, the pressure oil pushes the piston 5 and the baffle plate 6 connected to it, causing them to move and compress the friction plate group 10. This action causes the gear 11 to be connected to the clutch hub gear 1 and the clutch shaft 7 as a whole, achieving power transmission. In the oil discharge stage, the pressure oil flows back to the oil tank through the oil channel, and the oil pressure is released. The spring 12 then pushes the baffle plate 6 and the piston 5 back to their initial positions. Due to the rotation of the entire clutch mechanism and the centripetal force, the friction plates in the friction plate group 10 separate from the light plates, the power output is cut off, and the clutch is separated.

[0046] Throughout the process, the sealing ring 3 is made of alloy cast iron material, allowing a small amount of leakage, so that the residual oil in the cavity of the piston 5 and the clutch shaft 7 can be discharged through the sealing ring 3, keeping the system clean and reducing oil accumulation. The design of the split piston clutch makes the shifting process more rapid and smooth, effectively improving the performance and durability of the clutch. By controlling the filling and discharging of oil, the clutch can flexibly control the engagement and separation of mechanical power, meeting the needs of the transmission of engineering machinery or agricultural machinery.

[0047] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A piston clutch structure, characterized by, The clutch structure comprises a clutch hub gear (1), a piston (5), a baffle (6), a clutch shaft (7), a friction plate group (10) and a spring (12), the piston (5) is connected with the clutch hub gear (1) and the clutch shaft (7), one end of the spring (12) is connected with the baffle (6), and the other end is installed on the clutch shaft (7), and the inner and outer splines in the friction plate group (10) are respectively engaged with the gear (11) and the clutch hub gear (1). When the clutch is filled with oil, the pressure oil enters the cavity between the piston (5) and the clutch shaft (7) through the oil channel on the clutch shaft (7) to push the piston (5) to engage with the baffle (6), so as to compress the spring (12) and the friction plate group (10), so that the gear (11) is connected with the clutch hub gear (1) and the clutch shaft (7) to output torque. When the clutch is drained, the pressure oil flows back to the oil tank through the oil channel on the clutch shaft (7), so that the spring (12) pushes the baffle (6) and the piston (5) back to the initial position, and then the friction plate in the friction plate group (10) is separated from the light plate, and the power output is cut off.

2. The piston clutch structure according to claim 1, characterized by The clutch hub gear (1) is fixed on the clutch shaft (7) by a snap spring.

3. The piston clutch structure according to claim 1, characterized by The piston (5) is supported on the clutch shaft (7), and the piston (5) is sealed with the clutch shaft (7) by a sealing ring (3) and an O-ring (4).

4. The piston clutch structure according to claim 3, characterized by The surface of the sealing ring (3) and the O-ring (4) is coated with a layer of lubricating grease.

5. The piston clutch structure according to claim 4, characterized by The sealing ring (3) is made of alloy cast iron.

6. The piston clutch structure according to claim 1, characterized by The outer end of the friction plate group (10) is provided with a pressure bearing plate (9), and the pressure bearing plate (9) is engaged with the clutch hub gear (1) by inner and outer splines.

7. The piston clutch structure according to claim 6, characterized by The outer end of the friction plate group (10) is also provided with a check ring (8) for limiting the position of the friction plate group (10), and the check ring (8) is installed on the clutch hub gear (1).

8. The piston clutch structure according to claim 7, characterized by The baffle (6) is supported on the piston (5), and the baffle (6) fixes the clutch hub gear (1), the clutch shaft (7) and the gear (11) through the check ring (8).

9. The piston clutch structure according to claim 1, characterized by The gear (11) is fixed on the clutch shaft (7) by a bearing (13).

10. A gearbox characterized in that, The clutch structure comprises the clutch structure according to any one of claims 1 to 9.

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