Safety clutch of rice transplanter

Abstract

The utility model discloses a safety clutch of a rice transplanter, and mainly relates to the field of rice transplanters. Comprising a transmission shaft, a driven disc and a driving disc are sequentially arranged on the transmission shaft, the driving disc is in key connection with the transmission shaft, a plurality of arc-shaped grooves are formed in the side, close to the driving disc, of the driven disc in a circular array mode, a plurality of mounting cylinders are arranged on the driving disc in a circular array mode, and the ends, close to the driven disc, of the mounting cylinders are open; a spring and a ball are arranged in the mounting cylinder, the ball can be embedded into the arc-shaped groove, and the end of the transmission shaft is in threaded connection with a locking nut. The linkage device has the beneficial effects that the linkage of the driving disc and the driven disc is realized through the embedding of the balls and the arc-shaped grooves, and when the planting arm of the rice transplanter is blocked and blocked during operation and the resistance is greater than the pressure of the spring, the balls return into the mounting cylinder, so that the driven disc independently rotates, and the driving disc and the driven disc are in a sliding state; power of the transmission shaft cannot be transmitted to the driven disc, thereby effectively preventing overload damage of the planting arm mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of rice transplanter, specifically is a rice transplanter safety clutch. BACKGROUND

[0002] Rice transplanter is a kind of agricultural machinery that plants rice seedling into paddy field.When planting, first, the mechanical claw is taken from the seedbed to plant several rice seedlings into the soil of field, in order to keep the angle between seedbed and ground as a right angle, the front end of mechanical claw must adopt oval action curve when moving.The action is completed by the planetary mechanism of rotating or deformation gear, and the engine of advancing can drive these action mechanisms.

[0003] When the planting arm is stuck due to external factors such as hard soil and seedling winding, the power system of the existing rice transplanter such as transmission shaft and gear still continuously outputs power, which causes the mechanical parts such as chain, gear and planting arm to deform or break due to overload operation, which not only affects the production efficiency, but also increases the maintenance cost. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of safety clutches of rice transplanter, it is realized the linkage of driving disc and driven disc by the embedding of ball and arc-shaped groove, when rice transplanter planting arm operation meets obstruction and is stuck, resistance is greater than the pressure of spring, ball retreats into installation cylinder, so that driven disc independently rotates, driving disc and driven disc are in sliding state, transmission shaft power cannot be transmitted to driven disc, effectively prevent planting arm mechanism overload damage.

[0005] The utility model discloses a kind of safety clutches of rice transplanter, it is realized the linkage of driving disc and driven disc by the embedding of ball and arc-shaped groove, when rice transplanter planting arm operation meets obstruction and is stuck, resistance is greater than the pressure of spring, ball retreats into installation cylinder, so that driven disc independently rotates, driving disc and driven disc are in sliding state, transmission shaft power cannot be transmitted to driven disc, effectively prevent planting arm mechanism overload damage.

[0006] A kind of safety clutch of rice transplanter, including transmission shaft, the transmission shaft is equipped with driving disc and driving disc in turn, the key connection between driving disc and transmission shaft, the side circular array of driving disc is close to driving disc with multiple arc-shaped grooves, the circular array on driving disc has multiple installation cylinders, the one end of installation cylinder is opened close to driving disc, spring and ball are equipped in installation cylinder, ball can partially expose from installation cylinder opening end and embed with arc-shaped groove, the end of transmission shaft is screw thread connection with the locking nut for fastening driving disc and driven disc.

[0007] Further, the driving disc and driven disc are tightly attached by the locking nut, and the driven disc can be rotated independently.

[0008] Further, the periphery of the driven disc is welded with a driven sprocket.

[0009] Further, the one end of the installation cylinder away from the driven disc is penetrated and screw thread connected with an adjusting bolt.

[0010] Further, the number of the installation barrels is same as the number of the arc grooves.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The patent realizes linkage of the driving disc and the driven disc through the embedding of the ball and the arc groove, and when normally operating, the ball is embedded in the arc groove through the spring in the installation barrel, linkage operation of the driving disc and the driven disc is ensured, so that the transplanting arm normally operates under the driving of the transmission shaft; when the transplanting arm of the transplanter encounters an obstacle and is stuck, and the resistance is greater than the pressure of the spring, the ball is extruded and pushed back into the installation barrel along the inner wall curve of the arc groove, so that the driven disc can rotate independently on the transmission shaft, at this time, the transmission shaft can only drive the driving disc to rotate, the driven disc is in a relatively static state, the driving disc and the driven disc are in a sliding state, power of the transmission shaft cannot be transmitted to the driven disc, so the power for the transplanting arm is no longer provided, thereby effectively preventing deformation and damage of the transplanting arm mechanism after overload operation, the transplanting arm can operate after the obstacle is eliminated, production efficiency can be effectively ensured, maintenance cost is reduced, and the utility model is more practical. BRIEF DESCRIPTION OF DRAWINGS

[0013] ATTACHED Figure 1 It is a structural schematic diagram of the utility model.

[0014] ATTACHED Figure 2 It is a front view structural section view of the utility model.

[0015] ATTACHED Figure 3 It is a front view structural schematic diagram of the utility model.

[0016] ATTACHED Figure 4 It is a side view structural schematic diagram of the utility model.

[0017] REFERENCE NUMERALS IN THE DRAWINGS:

[0018] 1, transmission shaft; 2, driven disc; 3, driving disc; 4, arc groove; 5, installation barrel; 6, spring; 7, ball; 8, locking nut; 9, driven sprocket; 10, adjusting bolt. DETAILED DESCRIPTION

[0019] The utility model will be further described below in combination with specific embodiments. It should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the application.

[0020] The utility model discloses a safety clutch of rice transplanter, main body structure includes the transmission shaft 1 of power system such as motor connection, transmission shaft 1 is equipped with driven disc 2 and driving disc 3 in proper order, the key connection between driving disc 3 and transmission shaft 1, driving disc 3 is rotated by transmission shaft 1, the one side circular array of driven disc 2 is close to driving disc 3 has multiple arc grooves 4, the circular array of driving disc 3 has multiple installation cylinder 5 of quantity, position correspond with multiple arc grooves 4 respectively, the one end opening of installation cylinder 5 is close to driven disc 2, be equipped with spring 6 and ball 7 in installation cylinder 5, spring 6 is located between ball 7 and installation cylinder 5 inner end face, ball 7 can from installation cylinder 5 opening end partly expose and with arc groove 4 inlay, realize the linkage of driving disc 3 and driven disc 2 through the inlay of ball 7 and arc groove 4, and the inlay of ball 7 and arc groove 4 is firm through the elastic force of spring 6, makes the elastic force of spring 6 greater than the reaction force when normal operation of planting arm, to ensure the stability of the linkage of master-slave driving disc when normal operation, the locking nut 8 for fastening driving disc 3 and driven disc 2 is connected in transmission shaft 1 end portion screw, driving disc 3 is closely attached with driven disc 2 through locking nut 8, and can rotate driven disc 2 alone, ensure that can realize overload protection, the periphery welding of driven disc 2 has driven sprocket 9, and the operation of planting arm is driven by chain transmission with driven disc 2,

[0021] When normal operation, ball 7 is firmly inlaid in arc groove 4 through spring 6 in installation cylinder 5, and the elastic force of spring 6 is greater than the reaction force when normal operation of planting arm, to ensure the linkage operation of master-slave driving disc, to ensure the normal operation of planting arm, when the planting arm of rice transplanter meets the obstruction and is deadlocked, and the resistance is greater than the thrust of spring 6 to ball 7, driven disc 2 is stationary under the obstruction of planting arm, and ball 7 is extruded and pushed back into installation cylinder 5 along the inner wall curved surface of arc groove 4 when driving disc 3 rotates, so that driven disc 2 can rotate independently on transmission shaft 1, at this moment, transmission shaft 1 can only drive driving disc 3 to rotate, and driven disc 2 is in a relatively stationary state, so that driving disc and driven disc are in a sliding state, and the power of transmission shaft 1 cannot be transmitted to driven disc 2, so that the power for planting arm is not provided, thereby effectively preventing the deformation and damage of planting arm mechanism caused by overload operation, after the resistance caused by the obstruction is eliminated, spring 6 pushes ball 7 to be inlaid with arc groove 4 again, thereby driving driven disc 2 to rotate and restore operation.

[0022] Preferably, the one end of installation cylinder 5 away from driven disc 2 penetrates and is screw-connected with adjusting bolt 10, the length of adjusting bolt 10 screwed into installation cylinder 5 is changed to change the telescopic space of spring 6, thereby changing the thrust of spring 6 to ball 7, the size of linkage force between driving disc and driven disc is adjusted to adjust the size of resistance that can be resisted, the use is more flexible, and the application range is wider.

[0023] Installation process:

[0024] 1, the driven disc 2 on the transmission shaft 1, and card in the limit step;

[0025] 2, install the transmission shaft 1 flat key;

[0026] 3, the driving disc 3 key groove and transmission shaft 1 on the key groove alignment installation;

[0027] 4, install the lock nut 8, so that the driving disc 3 and the driven disc 2 closely, and can rotate the driven disc 2;

[0028] 5, the opening of the installation cylinder 5 is aligned with the arc groove 4 on the driven disc 2, the ball 7 and the spring 6 are put into the installation cylinder 5, the adjusting bolt 10 is screwed into the installation cylinder 5, and the length of the adjusting bolt 10 is adjusted according to the working condition, so that the spring 6 provides appropriate thrust for the ball 7, and the installation of the clutch is completed.

[0029] Power action principle;

[0030] 1, the power through the transmission shaft 1 driving the driving disc 3 rotation;

[0031] 2, through the ball 7 and the arc groove 4 embedded in the driving disc 3 and the driven disc 2 linkage, driving the driven disc 2 rotation, power transmission through the driven sprocket 9 to the rice transplanter planting arm operation;

[0032] 3, when the rice transplanter planting arm operation encounter obstruction dead, resistance through the transmission system on the driven sprocket 9, the driven disc 2 received by the spring 6 greater than the pre pressure, the ball 7 is extruded to drive back into the installation cylinder 5, the driven disc 2 from the driving disc 3 driving, transmission shaft 1 can only drive the driving disc 3 rotation, master driven disc in the sliding state, transmission shaft 1 power can't be transmitted to the driven disc 2, protect the planting arm mechanism is not damaged.

[0033] This patent can effectively prevent the deformation damage of the planting arm mechanism after overload operation, eliminate the obstacles of the planting arm, and restore the operation, which can effectively ensure the production efficiency, reduce the maintenance cost, and is more practical.

Claims

1. A safety clutch for a rice transplanter comprising a driving shaft (1) characterized in that: The transmission shaft (1) is sequentially provided with a driven disc (2) and a driving disc (3), the driving disc (3) is in key connection with the transmission shaft (1), the driven disc (2) is provided with a plurality of arc grooves (4) in a circular array on the side close to the driving disc (3), the driving disc (3) is provided with a plurality of mounting barrels (5) in a circular array, the mounting barrels (5) are open at one end close to the driven disc (2), the mounting barrels (5) are provided with springs (6) and balls (7) therein, the balls (7) can partially expose from the open end of the mounting barrels (5) and be embedded in the arc grooves (4), and the transmission shaft (1) is threadedly connected at the end with a locking nut (8) for fastening the driving disc (3) and the driven disc (2).

2. The safety clutch for rice transplanter according to claim 1, wherein: The driving disc (3) is tightly combined with the driven disc (2) through the locking nut (8), and the driven disc (2) can be rotated alone.

3. The safety clutch for rice transplanter according to claim 1, wherein: The driven disc (2) is welded with a driven sprocket (9) on the outer periphery.

4. The safety clutch for rice transplanter according to claim 1, wherein: The mounting barrels (5) are penetrated and threadedly connected with adjusting bolts (10) at the ends away from the driven disc (2).

5. The safety clutch for rice transplanter according to claim 1, wherein: The number of the mounting barrels (5) is the same as that of the arc grooves (4).

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