A rice husker and its self-locking rubber roller speed change structure

Abstract

A rice husker and a self-locking rubber roller speed change structure thereof, comprising a rubber roller with a rubber roller shaft, a fast roller pulley and a slow roller pulley mounted on the rubber roller shaft, a push-pull rod arranged in an axial sliding hole of the rubber roller shaft, and a clutch component connected to the push-pull rod for connecting with the fast roller pulley or the slow roller pulley, and also comprising a self-locking drive mechanism for controlling the movement of the push-pull rod and maintaining the position of the push-pull rod after the push-pull rod has completed its movement. In the present invention, the clutch component has good connection stability with the fast roller pulley or the slow roller pulley, and the connection between the clutch component and the fast roller pulley or the slow roller pulley is not easy to disconnect, which can reduce or even eliminate the need to maintain power input, and has the advantages of low power input cost, less wear of parts and components, high work efficiency, long service life, and convenient operation.

Description

Technical Field

[0001] The invention relates to the field of rice husker, in particular to a rice husker and a self-locking rubber roller speed change structure thereof. Background Art

[0002] Rice is husked mainly by the speed difference between the rubber rollers of the rice husker.

[0003] A dual-speed pneumatic automatic rice husking machine disclosed in application number CN201620288680.6 comprises a frame, an electric control box and a rice husking device are respectively mounted on the frame, a charging hopper is mounted on the rice husking device, a separation bin is mounted on the frame, the separation bin is connected to the rice husking device, the rice husking device comprises a rice husking motor, and the rice husking motor is connected to a movable roller pulley and a fixed roller pulley through a transmission belt. The movable roller pulley is connected to the movable cylinder, the movable roller pulley is connected to the movable rubber roller, the fixed roller pulley is connected to the fixed rubber roller, the movable roller pulley includes a fast roller pulley and a slow roller pulley, the fast roller pulley and the slow roller pulley are respectively movably installed on the rubber roller shaft through bearings, a shift lever is installed in the rubber roller shaft, a sliding claw is installed on the shift lever, the sliding claw can be engaged with the fast roller pulley or the slow roller pulley, and the shift lever is connected to the shift cylinder. In this patent, through the action of the shift cylinder, the clutch component of the sliding claw in the rice husker can be connected and switched between the fast roller pulley and the slow roller pulley, so that the speed of the movable rubber roller is switched, and then a linear speed difference is generated between the movable rubber roller and the fixed rubber roller. The rice husker has the characteristics of improving the working efficiency of the rice husker, reducing the labor intensity of workers, and improving the working environment of workers. However, no matter the sliding claw is connected to the fast roller pulley or the slow roller pulley, after the connection, the sliding claw must be kept in a fixed position by a holding force provided by the driving component - the shift cylinder. When the cylinder is weak or the holding force is insufficient, not only the connection between the sliding claw and the fast roller pulley or the slow roller pulley is easily disconnected, the working efficiency of the rice husker will be reduced, and the sliding claw will suddenly disconnect from the fast roller pulley and the slow roller pulley during the operation of the rice husker, which will easily lead to accelerated wear of the sliding claw, the fast roller pulley and the slow roller pulley, and shorten the service life of the rice husker. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a rice husker and a self-locking rubber roller speed change structure thereof, wherein the connection between the clutch component and the fast roller pulley or the slow roller pulley has good stability, and the connection between the clutch component and the fast roller pulley or the slow roller pulley is not easy to disconnect, and the input of holding force can be reduced or even eliminated, and the machine has the advantages of low power input cost, less wear on parts and components, high working efficiency, long service life, and easy operation.

[0005] A self-locking rubber roller speed change structure of a rice husker, comprising a rubber roller having a rubber roller shaft, a fast roller pulley and a slow roller pulley mounted on the rubber roller shaft, a push-pull rod arranged in an axial sliding hole of the rubber roller shaft, and a clutch component connected to the push-pull rod and used for connecting with the fast roller pulley or the slow roller pulley, and also comprising a self-locking drive mechanism for controlling the movement of the push-pull rod and maintaining the position of the push-pull rod after the push-pull rod has completed its movement;

[0006] The self-locking drive mechanism comprises an axial sliding lock sleeve sleeved on the rubber roller shaft, and a driving member for locking with the inner wall of the axial sliding lock sleeve and capable of driving the push-pull rod to move axially;

[0007] The driving member is rotatably mounted on the rubber roller shaft, and includes a rotating part, a locking part connected to the rotating part and distributed on both sides of the rotating part, and a driving part connected to the rotating part and distributed on both sides of the rotating part. The two driving parts and the two locking parts form two sets of lever structures with the rotating center of the rotating part as the fulcrum.

[0008] A force bearing groove is arranged on the circumferential surface of the push-pull rod, and the force bearing groove has two force bearing surfaces distributed in the axial direction and respectively used to act with the corresponding driving parts. The rubber roller shaft is also provided with a clearance groove 1 for making way for the driving part to rotate;

[0009] In an unlocked state, the two locking portions are located on both sides of the axially sliding locking sleeve.

[0010] In the present technical solution, when an axial force is applied to the axial sliding locking sleeve, the axial sliding locking sleeve slides axially on the rubber roller shaft, which will force one of the locking parts on the movement path of the axial sliding locking sleeve to rotate downward around the rotating part, and the corresponding driving part of the lever structure formed with the locking part will rotate upward. In the process of upward rotation, the driving part acts on the corresponding force-bearing surface, prompting the push-pull rod to move in the axial sliding hole, and as the axial sliding locking sleeve continues to move, the push-pull rod drives the clutch component to connect with the fast roller pulley or the slow roller pulley, and at the same time, the locking part enters the axial sliding locking sleeve, and uses the friction between the inner wall of the axial sliding locking sleeve to achieve locking between the axial sliding locking sleeve and the driving member. It can be seen that the rubber roller speed change structure in the present technical solution realizes self-locking through the friction between the locking part and the inner wall of the axial sliding locking sleeve when the clutch component completes the connection with the fast roller pulley or the slow roller pulley, thereby maintaining the position of the push-pull rod. The connection stability between the clutch component and the fast roller pulley or the slow roller pulley is good, and the input of the holding force can be reduced or even unnecessary after the axial sliding locking sleeve is applied, thereby reducing the power input cost, reducing the wear of parts and components, and improving the working efficiency and long service life. In addition, the connection between the clutch component and the fast roller pulley or the slow roller pulley can be achieved only by controlling the action of the axial sliding locking sleeve, which is easy to operate.

[0011] Preferably, in any lever structure, the distance between the driving portion and the rotating portion is smaller than the distance between the locking portion and the rotating portion.

[0012] Preferably, the push-pull rod is connected to the clutch component via a connecting portion, a second giving way groove for giving way to the connecting portion is provided on the rubber roller shaft, and the connecting portion passes through the second giving way groove.

[0013] Preferably, the rotating portion is connected in the first clearance groove.

[0014] Preferably, the fast roller pulley and the slow roller pulley are respectively provided with friction parts for connecting with the clutch component.

[0015] Preferably, the clutch component comprises a sleeve portion sleeved on the rubber roller shaft, and a friction action portion arranged on both sides of the sleeve portion and having an adjustable distance from the friction portion.

[0016] Preferably, the friction acting portion is connected to the sleeve portion via threads.

[0017] Preferably, a driving cylinder is provided on the rubber roller shaft, and a push-pull frame connected to the axial sliding locking sleeve is provided on the driving cylinder.

[0018] Preferably, an axial sliding groove is provided on the inner wall of the axial sliding locking sleeve, and the driving member is limited in the axial sliding groove.

[0019] A rice husker comprises the rubber roller speed change structure described in any one of the above technical solutions.

[0020] In summary, the present invention has the following beneficial effects:

[0021] 1: The rubber roller speed change structure has good connection stability between the clutch component and the fast roller pulley or the slow roller pulley. The connection between the clutch component and the fast roller pulley or the slow roller pulley is not easy to disconnect, which can reduce or even eliminate the need for input of holding force. It has the advantages of low power input cost, less wear of parts and components, high work efficiency, long service life, and easy operation.

[0022] 2: The rubber roller speed change structure can switch the connection between the clutch component and the fast roller pulley or the slow roller pulley when the rice husker is running, which improves the working efficiency of the rice husker and is easy to operate;

[0023] 3: The rubber roller speed change structure can achieve better connection stability of the clutch component by applying a small force to the axial sliding lock sleeve, which has the advantages of simple and convenient operation for users;

[0024] 4: In the rubber roller speed change structure, the clutch component is connected to the fast roller pulley or the slow roller pulley by friction connection, and the position of the friction action part on the clutch component is adjustable. When the friction part and the clutch component are worn, the position of the friction action part on the sleeve part can be adjusted to ensure the connection stability between the clutch component and the fast roller pulley or the slow roller pulley. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the rubber roller speed change structure;

[0026] Figure 2 It is a partial cross-sectional view of the rubber roller speed change structure;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0028] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0029] Example: Figure 1-3As shown, a self-locking rubber roller speed change structure of a rice husker comprises a rubber roller 1 having a rubber roller shaft 11, a fast roller pulley 2 and a slow roller pulley 3, a push-pull rod 4, and a clutch component 5. The fast roller pulley 2 and the slow roller pulley 3 are mounted on the rubber roller shaft 11 through rolling bearings. The push-pull rod 4 is arranged in an axial sliding hole 111 of the rubber roller shaft 11 and is connected to the clutch component 5 through a connecting portion 40. The connecting portion 40 may be a connecting pin, a connecting stud, etc., and is not specifically limited. The rubber roller shaft 11 is provided with a giving way groove 113 for giving way to the connecting portion 40. The connecting portion 40 passes through the second clearance groove 113, and the second clearance groove 113 provides an escape space when the connecting portion 40 moves axially with the push-pull rod 4. The clutch component 5 is used to switch the connection with the fast roller pulley 2 or the slow roller pulley 3. Different from the general rubber roller speed change structure, the rubber roller speed change structure in this embodiment also includes a self-locking drive mechanism 6 for controlling the movement of the push-pull rod 4 and maintaining the position of the push-pull rod 4 after the push-pull rod 4 has completed its movement. Specifically, the self-locking drive mechanism 6 includes an axial sliding lock sleeve 61 sleeved on the rubber roller shaft 11 and a self-locking drive mechanism 6 for connecting with the rubber roller shaft 11. The inner wall of the axial sliding lock sleeve 61 cooperates to lock and drive the driving member 62 that can drive the push-pull rod 4 to axially move. The driving member 62 is rotatably installed on the rubber roller shaft 11, and includes a rotating part 621, a locking part 622 connected to the rotating part 621 and distributed on both sides of the rotating part 621, and a driving part 623 connected to the rotating part 621 and distributed on both sides of the rotating part 621. The two driving parts 623 and the two locking parts 622 form two sets of lever structures with the rotation center of the rotating part 621 as the fulcrum. A force groove 41 is arranged on the circumferential surface of the pull rod 4, and the force groove 41 has two force surfaces 411 distributed in the axial direction. The two force surfaces 411 are respectively used to act on the corresponding driving parts 623. In order to ensure that the driving part 623 can act on the force surfaces 411, the rubber roller shaft 11 is also provided with a make way groove 112 for the rotation of the driving part 62. As for the position distribution of the two locking parts 622, in this structure, in the unlocked state, the two locking parts 622 are located on both sides of the axial sliding locking sleeve 61.In this embodiment, when an axial force is applied to the axial sliding locking sleeve 61, the axial sliding locking sleeve 61 slides axially on the rubber roller shaft 11, which will compel one of the locking parts 622 on the movement path of the axial sliding locking sleeve 61 to rotate downward around the rotating part 621, and the corresponding driving part 623 that forms a lever structure with the locking part 622 rotates upward. During the upward rotation process, the driving part 623 acts on the corresponding force-bearing surface 411, prompting the push-pull rod 4 to move in the axial sliding hole 111, and as the axial sliding locking sleeve 61 continues to move, the push-pull rod 4 drives the clutch component 5 to connect with the fast roller pulley 2 or the slow roller pulley 3, and at the same time, the locking part 622 enters the axial sliding locking sleeve 61, and uses the friction between the inner wall of the axial sliding locking sleeve 61 to achieve locking between the axial sliding locking sleeve 61 and the driving member 62. It can be seen that the rubber roller speed change structure in the present technical solution realizes self-locking through the friction between the locking portion 622 and the inner wall of the axial sliding locking sleeve 61 when the clutch component 5 completes the connection with the fast roller pulley 2 or the slow roller pulley 3, thereby maintaining the position of the push-pull rod 4. The clutch component 5 has good connection stability with the fast roller pulley 2 or the slow roller pulley 3. After applying force to the axial sliding locking sleeve 61, the input of the holding force can be reduced or even unnecessary, thereby reducing the power input cost, reducing the wear of parts and components, and improving the working efficiency and long service life. In addition, the connection between the clutch component 5 and the fast roller pulley 2 or the slow roller pulley 3 can be achieved only by controlling the movement of the axial sliding locking sleeve 61, which is easy to operate.

[0030] In any of the above two lever structures, the distance between the driving part 623 and the rotating part 621 is smaller than the distance between the locking part 622 and the rotating part 621. According to the lever principle, the axial force applied to the axial sliding lock sleeve 61 can be amplified to act on the push-pull rod 4, which not only makes it easy for the push-pull rod 4 to move and reduces the difficulty of controlling the axial sliding lock sleeve 61, but also the clutch component 5 can act on the fast roller pulley 2 or the slow roller pulley 3 with a large force to achieve connection, and the connection stability is good. Therefore, through this setting, a small force can be applied to the axial sliding lock sleeve 61 to achieve good connection stability of the clutch component 5, which has the advantages of simple and convenient operation for users.

[0031] In this embodiment, the rotating portion 621 is connected to the first clearance groove 112 .

[0032] For the connection between the clutch component 5 and the fast roller pulley 2 or the slow roller pulley 3, a key-key slot connection or a card slot-block connection can be adopted. These are existing technologies in the rice husker and will not be described in detail here. In this embodiment, the fast roller pulley 2 and the slow roller pulley 3 are respectively provided with a friction part 7 for connecting with the clutch component 5. The friction part 7 can be composed of a plurality of friction plates. Friction clutch is achieved through the interaction between the friction part 7 and the clutch component 5, which provides a premise and guarantee for the switching connection between the clutch component 5 and the fast roller pulley or the slow roller pulley during the operation of the rice husker. For the rice husker, the linear speed difference between the rubber rollers can be obtained without stopping the operation, thereby improving the working efficiency of the rice husker. Since the friction part 7 and the clutch part 5 will be worn during repeated friction clutching, further, in this embodiment, the clutch part 5 includes a sleeve part 51 sleeved on the rubber roller shaft 11, and a friction action part 52 arranged on both sides of the sleeve part 51 and capable of adjusting the distance with the friction part 7, and the sleeve part 51 is connected to the push-pull rod 4 through the above-mentioned connecting part 40. When the friction part 7 and the clutch part 5 are worn, the position of the friction action part 52 on the sleeve part 51 can be adjusted to provide a guarantee for the connection stability between the clutch part 5 and the fast roller pulley or the slow roller pulley. In this embodiment, the friction action part 52 is connected to the sleeve part 51 by a thread, so that the adjustment of the friction action part 52 is more convenient.

[0033] As for how to apply axial force to the axial sliding lock sleeve 61, it can be applied directly manually or with the help of tools, and can be controlled by automated tools such as cylinders or oil cylinders. Among them, in this embodiment using cylinder control, in the specific design, a driving cylinder 81 is provided on the rubber roller shaft 11, and the driving cylinder 81 can be fixed on the rubber roller shaft 11 and rotate with the rubber roller shaft 11, or it can be installed on the rubber roller shaft 11 through a bearing to maintain a relative operating state with the rubber roller shaft 11. The driving cylinder 81 is provided with a push-pull frame 82 connected to the axial sliding lock sleeve 61. When the driving cylinder 81 is fixed on the rubber roller shaft 11, the push-pull frame 82 can be directly fixedly connected to the axial sliding lock sleeve 61. At this time, the axial sliding lock sleeve 61, the driving cylinder 81, and the push-pull frame 82 rotates with the rubber roller shaft 11, and the axial sliding locking sleeve 61, the driving cylinder 81, and the push-pull frame 82 are relatively stationary. When the driving cylinder 81 is installed on the rubber roller shaft 11 through the bearing and the rubber roller shaft 11, the driving cylinder 81 can be fixed on the external frame, and the fixed driving cylinder 81 has a better service life. At this time, the axial sliding locking sleeve 61 is provided with an outer ring groove 611, and the push-pull frame 82 includes a limiting connecting block 821 limited in the outer ring groove 611. The rubber roller shaft 11 rotates relative to the driving cylinder 81, and the outer ring groove 611 rotates relative to the limiting connecting block 821.

[0034] This arrangement, which provides power for the movement of the axial sliding locking sleeve 61 through the driving cylinder 81, has high automation efficiency, and after the clutch component 5 is connected to the fast roller pulley 2 or the slow roller pulley 3, it can continue to provide a holding force acting on the axial sliding locking sleeve 61, so that the clutch component 5 is finally continuously and effectively connected to the fast roller pulley 2 or the slow roller pulley 3, further ensuring the working efficiency of the rice husker. Moreover, due to the force amplification effect of the above-mentioned lever structure, when the holding force of the cylinder's air intake pipe is reduced due to aging or other reasons, the clutch component 5 can also be continuously and effectively connected to the fast roller pulley 2 or the slow roller pulley 3. In addition, the rubber roller speed change structure, when the driving cylinder 81 is fixed and the rice husker is in operation, the driving cylinder 81 can replace manual labor to provide stable switching power for the switching connection between the clutch component 5 and the fast roller pulley or the slow roller pulley, and has high safety. When the rice husker is in operation and the connection needs to be switched, the piston rod of the driving cylinder 81 is actuated to drive the push-pull frame 82 to move. The push-pull frame 82 drives the axial sliding locking sleeve 61 to move through the limiting connecting block 821 limited in the outer ring groove 611. The axial sliding locking sleeve 61 drives the push-pull rod 4 through the driving member 62, thereby causing the clutch component 5 connected to the push-pull rod 4 to move to achieve the switching connection.

[0035] In order to further ensure the sliding direction of the axial sliding lock sleeve 61 , an axial sliding groove 612 is provided on the inner wall of the axial sliding lock sleeve 61 , and the driving member 62 is limited in the axial sliding groove 612 .

[0036] A rice husker comprises a rubber roller speed change structure in any of the above embodiments. The clutch component has good connection stability with a fast roller pulley or a slow roller pulley, and the connection between the clutch component and the fast roller pulley or the slow roller pulley is not easy to disconnect, which can reduce or even eliminate the need for input of holding force, and has the advantages of low power input cost, less wear of parts, high work efficiency, long service life, and convenient operation.

[0037] The above-described embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A self-locking rubber roller speed change structure of a rice husker, comprising a rubber roller (1) having a rubber roller shaft (11), a fast roller pulley (2) and a slow roller pulley (3) mounted on the rubber roller shaft (11), a push-pull rod (4) arranged in an axial sliding hole (111) of the rubber roller shaft (11), and a clutch component (5) connected to the push-pull rod (4) and used for coupling with the fast roller pulley (2) or the slow roller pulley (3), characterized in that: It also includes a self-locking drive mechanism (6) for controlling the movement of the push-pull rod (4) and maintaining the position of the push-pull rod (4) after the push-pull rod (4) has completed its movement; The self-locking drive mechanism (6) comprises an axial sliding lock sleeve (61) sleeved on the rubber roller shaft (11), and a drive member (62) for locking with the inner wall of the axial sliding lock sleeve (61) and capable of driving the push-pull rod (4) to move axially; The driving member (62) is rotatably mounted on the rubber roller shaft (11), and comprises a rotating portion (621), a locking portion (622) connected to the rotating portion (621) and distributed on both sides of the rotating portion (621), and a driving portion (623) connected to the rotating portion (621) and distributed on both sides of the rotating portion (621), wherein the two driving portions (623) and the two locking portions (622) form two sets of lever structures with the rotation center of the rotating portion (621) as a fulcrum; A force bearing groove (41) is provided on the circumferential surface of the push-pull rod (4), and the force bearing groove (41) has two force bearing surfaces (411) distributed in the axial direction and respectively used to act with corresponding driving parts (623). The rubber roller shaft (11) is also provided with a clearance groove (112) for making way for the driving member (62) to rotate. In an unlocked state, the two locking portions (622) are located on both sides of the axial sliding locking sleeve (61); The push-pull rod (4) is connected to the clutch component (5) via a connecting portion (40); a second paving groove (113) for paving the connecting portion (40) is provided on the rubber roller shaft (11); and the connecting portion (40) passes through the second paving groove (113); The rotating portion (621) is connected to the first clearance groove (112).

2. The self-locking rubber roller speed change structure of a rice husker according to claim 1 is characterized in that: In any lever structure, the distance between the driving portion (623) and the rotating portion (621) is smaller than the distance between the locking portion (622) and the rotating portion (621).

3. The self-locking rubber roller speed change structure of a rice husker according to claim 1, characterized in that: The fast roller pulley (2) and the slow roller pulley (3) are respectively provided with a friction portion (7) for connecting with the clutch component (5).

4. The self-locking rubber roller speed change structure of a rice husker according to claim 3 is characterized in that: The clutch component (5) comprises a sleeve portion (51) sleeved on the rubber roller shaft (11), and a friction action portion (52) arranged on both sides of the sleeve portion (51) and capable of adjusting the distance between the sleeve portion and the friction portion (7).

5. The self-locking rubber roller speed change structure of a rice husker according to claim 4, characterized in that: The friction acting portion (52) is connected to the sleeve-fitting portion (51) via threads.

6. The self-locking rubber roller speed change structure of a rice husker according to claim 1, characterized in that: The rubber roller shaft (11) is provided with a driving cylinder (81), and the driving cylinder (81) is provided with a push-pull frame (82) connected to the axial sliding locking sleeve (61).

7. The self-locking rubber roller speed change structure of a rice husker according to claim 1, characterized in that: An axial sliding groove (612) is provided on the inner wall of the axial sliding locking sleeve (61), and the driving member (62) is limited in the axial sliding groove (612).

8. A rice husker comprising the rubber roller speed change structure described in any one of claims 1 to 7.

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