A rotary cultivator clutch transmission system

Abstract

The application discloses a rotary cultivator clutch transmission system, which comprises a gearbox body, a power input shaft, a driven pulley, a hydraulic pump and a clutch; one end of the power input shaft is connected with the driven pulley; the other end of the power input shaft is connected with a pump shaft of the hydraulic pump after penetrating through the gearbox body; the clutch is a normally open clutch and is sleeved on the power input shaft; an output driving gear is arranged on the outer cover of the clutch; when the clutch is combined, the power input shaft can drive the output driving gear to rotate synchronously through the clutch. The application can quickly realize braking, improve braking efficiency, and thus improve safety; and the structural layout is more reasonable, the use of parts can be effectively reduced, the space occupied by power transmission components can be reduced, the stability of power transmission can be improved, and the cost can be reduced.

Description

Technical Field

[0001] This invention relates to the field of rotary tiller technology, and more particularly to a rotary tiller clutch transmission system. Background Technology

[0002] With the development of technology, agricultural equipment is increasingly being used in agricultural production. Among them, rotary tillers are mainly used for tilling and harrowing fields. They are widely used because of their soil-breaking ability and the high degree of flatness of the ground after tilling.

[0003] Current rotary tillers primarily operate by driving the power take-off shaft and hydraulic pump shaft via a pulley on the engine's output shaft. Typically, rotary tillers use a normally closed clutch, controlling power output through clutch engagement and disengagement. However, this design has poor safety features, especially when the machine is not stopped. To stop operation or move the machine, the clutch must be kept disengaged, which is not only unsafe but also extremely inconvenient for the operator. Furthermore, even after the clutch is disengaged, the traveling end and / or tilling end continue to rotate at a certain speed due to inertia. Even with braking, it takes time to come to a complete stop, reducing braking efficiency.

[0004] In addition, in existing rotary tillers, the hydraulic pump shaft is driven by pulleys and belts on the engine output shaft. Therefore, during installation, the hydraulic pump and the pulleys on the engine output shaft are installed on the same side of the rotary tiller. This not only results in a large space occupied by the entire power transmission system after installation, but also requires the installation of multiple pulleys or pulleys with multiple belt grooves on the engine output shaft, which will increase the number of parts, increase costs, and easily affect the stability of the entire power transmission process. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the purpose of this invention is to solve the problems of existing rotary tillers having many power transmission components, occupying a large space, having unchanging clutch control, poor safety, and low braking efficiency; and to provide a rotary tiller clutch transmission system that can quickly achieve braking, improve braking efficiency, and thus improve safety; and the structure layout is more reasonable, which can effectively reduce the use of components, reduce the space occupied by power transmission components, improve the stability of power transmission, and reduce costs.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a rotary tiller clutch transmission system, including a gearbox housing, a power input shaft, a driven pulley, a hydraulic pump, and a clutch; one end of the power input shaft is connected to the driven pulley; characterized in that: the other end of the power input shaft passes through the housing and is connected to the pump shaft of the hydraulic pump; The clutch is a normally open clutch and is mounted on the power input shaft; an output drive gear is provided on the outer cover of the clutch, and when the clutch is engaged, the power input shaft can drive the output drive gear to rotate synchronously through the clutch.

[0007] Furthermore, the normally open clutch includes an outer cover, a pressure plate, a driving friction plate, and a driven friction plate, all sleeved on the power input shaft. The outer cover is closed at one end and open at the other, with the output driving gear fixedly connected to the closed end of the outer cover. Several slots are formed around the outer cover, extending through the open end. The driving and driven friction plates are alternately distributed inside the outer cover, and the pressure plate is located at the open end of the outer cover. A transmission plate is positioned on the outer edge of the driven friction plate and the pressure plate, corresponding to the slots, and the transmission plate extends... The driven friction plate and the pressure plate are both positioned in corresponding slots and can move axially along the power input shaft. The power input shaft has several toothed grooves formed around its circumference corresponding to the clutch position. The inner edge of the driving friction plate has protruding teeth at the corresponding toothed groove positions, and the protruding teeth mesh with the toothed grooves, enabling the power input shaft to drive the driving friction plate to rotate synchronously. A clutch shift fork is provided on the side of the pressure plate away from the outer cover. The clutch shift fork is connected to the housing through a shift fork shaft, and the shift fork shaft can rotate, thereby driving the pressure plate to move axially along the power input shaft.

[0008] Furthermore, the transmission plate on the outer edge of the pressure plate protrudes from the outer wall of the outer cover, and a clutch release spring is provided between the closed end of the outer cover and the transmission plate on the outer edge of the pressure plate.

[0009] Furthermore, the inner edge of the pressure plate extends toward the side away from the outer cover to form a shaft tube, and the end of the shaft tube is provided with several notches; a limiting plate is also sleeved on the power input shaft, the limiting plate is located on the side of the shaft tube away from the outer cover, and the side of the limiting plate near the shaft tube has a bushing, and the end of the bushing is provided with a protrusion corresponding to the position of the notch, and the protrusion extends into the notch, so that the limiting plate can rotate synchronously with the pressure plate; A brake friction pad is provided on the side of the limiting disc away from the bushing. The brake friction pad is fixedly connected to the housing through a friction pad support seat. When the limiting disc moves toward the brake friction pad, it can contact the brake friction pad and generate friction.

[0010] Furthermore, a thrust bearing is provided between the pressure plate and the clutch shift fork.

[0011] Furthermore, the hydraulic pump is fixedly connected to the housing via a connecting seat.

[0012] Furthermore, the power input shaft is connected to the pump shaft of the hydraulic pump via a coupling.

[0013] Furthermore, it also includes a drive shaft with an output driven gear on it, which meshes with the output driving gear.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The engine output shaft only needs to drive the power input shaft of the gearbox via pulleys and belts. Since the pump shaft of the hydraulic pump is directly connected to the power input shaft, the hydraulic pump can start as soon as the engine starts. This can effectively reduce the number of parts, reduce costs, and improve power transmission efficiency and stability. Furthermore, installing the hydraulic pump on the side of the gearbox away from the pulleys can also effectively reduce the space occupied by the gearbox and make installation more convenient.

[0015] 2. By setting a separation spring between the outer cover and the pressure plate, the active friction plate and the driven friction plate can be quickly separated, thereby quickly cutting off the power.

[0016] 3. When the clutch disengages, the release spring pushes the pressure plate to move, which in turn pushes the limit plate to press against the friction plate to generate friction. This friction then acts on the outer cover, thereby quickly braking the outer cover and achieving rapid braking of the output drive gear, i.e., braking of the entire rotary tiller. This greatly improves the safety of the rotary tiller during use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the structure after omitting the clutch shift fork.

[0019] Figure 3 for Figure 2 A sectional view along direction AA.

[0020] In the diagram: 1—Power input shaft, 2—Driven pulley, 3—Hydraulic pump, 41—Outer cover, 42—Pressure plate, 43—Driving friction plate, 44—Driven friction plate, 45—Transmission plate, 5—Output driving gear, 6—Clutch fork, 7—Clutch release spring, 8—Limiting plate, 9—Brake friction plate, 10—Friction plate support seat, 11—Thrust bearing, 12—Connecting seat, 13—Transmission shaft, 14—Output driven gear. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Example: See Figure 1 , Figure 2 as well as Figure 3A rotary tiller clutch transmission system includes a gearbox housing, a power input shaft 1, a driven pulley 2, a hydraulic pump 3, and a clutch. One end of the power input shaft 1 is connected to the driven pulley 2; the other end of the power input shaft 1 passes through the gearbox housing and is connected to the pump shaft of the hydraulic pump 3. In implementation, the power input shaft 1 is connected to the pump shaft of the hydraulic pump 3 via a coupling. The housing of the hydraulic pump 3 is fixedly connected to the gearbox housing via a connecting seat 12. A support bearing is provided between the connecting shaft and the power input shaft 1 to ensure the normal rotation of the power input shaft 1.

[0025] The clutch is a normally open clutch and is mounted on the power input shaft 1. An output drive gear 5 is provided on the outer cover 41 of the clutch. When the clutch is engaged, the power input shaft 1 can drive the output drive gear 5 to rotate synchronously through the clutch.

[0026] The normally open clutch includes an outer cover 41, a pressure plate 42, a driving friction plate 43, and a driven friction plate 44, all mounted on the power input shaft 1. The outer cover 41 is closed at one end and open at the other. The output driving gear 5 is mounted on the power input shaft 1 and fixedly connected to the closed end of the outer cover 41, with a gap between the output driving gear 5 and the power input shaft 1. Several slots are formed around the outer cover 41, penetrating the side walls (inner and outer walls) of the outer cover 41 and arranged axially along the power output shaft. The slots also penetrate the open end of the outer cover 41. The driving friction plate 43 and the driven friction plate 44 are alternately distributed inside the outer cover 41, and the pressure plate 42 is located at the open end of the outer cover 41. On the outer edges of the driven friction plate 44 and the pressure plate 42, a transmission plate 45 is provided at the corresponding slot position. The transmission plate 45 extends into the corresponding slot, and both the driven friction plate 44 and the pressure plate 42 can move axially along the power input shaft 1. During the movement of the pressure plate 42, the transmission plate 45 on its edge is always located within the slot. The transmission plate 45 on the outer side of the driven friction plate 44 is located between the inner and outer walls of the outer cover 41 or flush with the outer wall of the outer cover 41 (i.e., not protruding from the outer cover 41). The power input shaft 1 has several toothed grooves formed around its circumference corresponding to the clutch position. The inner edge of the driving friction plate 43 has protruding teeth at the corresponding toothed groove positions, and the protruding teeth mesh with the toothed grooves, enabling the power input shaft 1 to drive the driving friction plate 43 to rotate synchronously. In implementation, the transmission plate 45 on the outer edge of the pressure plate 42 protrudes from the outer wall of the outer cover 41, and a clutch release spring 7 is provided between the closed end of the outer cover 41 and the transmission plate 45 on the outer edge of the pressure plate 42. As an optimization, a raised edge with a loop around one revolution is provided on the outer side of the closed end of the outer cover 41 to form a spring seat; the clutch release spring 7 is sleeved on the outer cover 41, and its two ends are respectively attached to the raised edge and the transmission plate 45 on the outer edge of the pressure plate 42.

[0027] A clutch fork 6 is provided on the side of the pressure plate 42 away from the outer cover 41. The clutch fork 6 is connected to the housing via a fork shaft, and the fork shaft allows the fork to rotate, thereby driving the pressure plate 42 to move axially along the power input shaft 1. In practice, a thrust bearing 11 is also provided between the pressure plate 42 and the clutch fork 6. In the actual assembly process, a transmission shaft 13 is also included, on which an output driven gear 14 is provided, which meshes with the output driving gear 5.

[0028] In the specific implementation process, the inner edge of the pressure plate 42 extends towards the side away from the outer cover 41 to form a shaft tube, and the end of the shaft tube is provided with several notches; the thrust bearing 11 is sleeved on the shaft tube. A limiting plate 8 is also sleeved on the power input shaft 1. The limiting plate 8 is located on the side of the shaft tube away from the outer cover 41. The side of the limiting plate 8 near the shaft tube has a bushing, and the end of the bushing is provided with a protrusion corresponding to the position of the notch. The protrusion extends into the notch, so that the limiting plate 8 can rotate synchronously with the pressure plate 42. During the movement of the pressure plate 42 under the push of the shift fork, the protrusion is always located in the notch, thereby ensuring that the output drive gear 5 can be quickly braked when the clutch is disengaged.

[0029] A brake friction pad 9 is provided on the side of the limiting disc 8 away from the bushing. The brake friction pad 9 is fixedly connected to the housing through a friction pad support 10. When the limiting disc 8 moves towards the brake friction pad 9, it can contact the brake friction pad 9 and generate friction. In practice, one side of the connecting seat 12 extends into the housing and forms a support tube. The support seat is sleeved on the support tube and is interference-fitted with the support tube to achieve a fixed connection with the housing.

[0030] In this design, the engine output shaft only needs to drive the power input shaft 1 of the gearbox via a pulley and belt. Since the pump shaft of the hydraulic pump 3 is directly connected to the power input shaft 1, the hydraulic pump 3 can start as soon as the engine starts. This effectively reduces the number of parts and costs, while improving power transmission efficiency and stability. Furthermore, installing the hydraulic pump 3 on the side of the gearbox away from the pulley also effectively reduces the space occupied by the gearbox and makes installation more convenient.

[0031] By setting a separation spring between the outer cover 41 and the pressure plate 42, the driving friction plate 43 and the driven friction plate 44 can be quickly separated, thereby quickly cutting off the power. When the clutch is disengaged, the separation spring pushes the pressure plate 42 to move, which in turn pushes the limit plate 8 to press against the friction plate to generate friction. This friction then acts on the outer cover 41, thereby quickly braking the outer cover 41 and realizing the rapid braking of the output driving gear 5, that is, the braking of the entire rotary tiller, which can greatly improve the safety of the rotary tiller during use.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A clutch transmission system for a rotary tiller, comprising a gearbox housing, a power input shaft, a driven pulley, a hydraulic pump, and a clutch; one end of the power input shaft is connected to the driven pulley; characterized in that: The other end of the power input shaft passes through the housing and is connected to the pump shaft of the hydraulic pump; The clutch is a normally open clutch and is mounted on the power input shaft; an output drive gear is provided on the outer cover of the clutch, and when the clutch is engaged, the power input shaft can drive the output drive gear to rotate synchronously through the clutch. The normally open clutch includes an outer cover, a pressure plate, a driving friction plate, and a driven friction plate, all fitted onto the power input shaft. One end of the outer cover is closed, and the other end is open. The output driving gear is fixedly connected to the closed end of the outer cover. Several slots are formed around the outer cover, extending through the open end. The driving and driven friction plates are alternately distributed inside the outer cover, and the pressure plate is located at the open end. A transmission plate is positioned on the outer edge of the driven friction plate and the pressure plate, corresponding to the slots, and extends into the clutch. The driven friction plate and the pressure plate are both positioned within the slots and can move axially along the power input shaft. The power input shaft has several toothed grooves formed around its circumference corresponding to the clutch position. The inner edge of the driving friction plate has protruding teeth corresponding to the toothed grooves, and the protruding teeth mesh with the toothed grooves, enabling the power input shaft to drive the driving friction plate to rotate synchronously. A clutch shift fork is provided on the side of the pressure plate away from the outer cover. The clutch shift fork is connected to the housing through a shift fork shaft, and can rotate through the shift fork shaft, thereby driving the pressure plate to move axially along the power input shaft.

2. The rotary tiller clutch transmission system according to claim 1, characterized in that: The transmission plate on the outer edge of the pressure plate protrudes from the outer wall of the outer cover, and a clutch release spring is provided between the closed end of the outer cover and the transmission plate on the outer edge of the pressure plate.

3. The rotary tiller clutch transmission system according to claim 1, characterized in that: The inner edge of the pressure plate extends toward the side away from the outer cover to form a shaft tube, and the end of the shaft tube is provided with several notches; a limiting plate is also sleeved on the power input shaft, the limiting plate is located on the side of the shaft tube away from the outer cover, and the side of the limiting plate near the shaft tube has a bushing, and the end of the bushing is provided with a protrusion corresponding to the position of the notch, and the protrusion extends into the notch, so that the limiting plate can rotate synchronously with the pressure plate; A brake friction pad is provided on the side of the limiting disc away from the bushing. The brake friction pad is fixedly connected to the housing through a friction pad support seat. When the limiting disc moves toward the brake friction pad, it can contact the brake friction pad and generate friction.

4. The rotary tiller clutch transmission system according to claim 1, characterized in that: A thrust bearing is also provided between the pressure plate and the clutch shift fork.

5. A rotary tiller clutch transmission system according to claim 1, characterized in that: The hydraulic pump is fixedly connected to the housing via a connecting seat.

6. The rotary tiller clutch transmission system according to claim 1, characterized in that: The power input shaft is connected to the pump shaft of the hydraulic pump via a coupling.

7. The rotary tiller clutch transmission system according to claim 1, characterized in that: It also includes a drive shaft with an output driven gear on it, which meshes with the output driving gear.

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