Spider hand internal transmission mechanism

Abstract

The utility model relates to the technical field of transmission production of cigarette making machine equipment, in particular to a spider hand internal transmission mechanism which comprises a synchronous belt wheel connected with an external power source, the synchronous belt wheel is fixedly connected with a rotating wheel body, a plurality of through holes are evenly distributed in the front end of the rotating wheel body along a center shaft, and an eccentric shaft is rotationally connected in each through hole. The front end of the eccentric shaft is connected with an arm, and the arm is connected with a suction claw through an internal belt transmission mechanism; the rear end of the eccentric shaft is rotationally connected with an eccentric disc, an eccentric driving block is arranged in the eccentric disc, and the eccentric driving block is connected with the rotating wheel body through a differential gear set; the differential gear set is arranged in the transmission mechanism, one power source input can be converted into two outputs which are coaxial but opposite in direction, the rotating wheel body and the eccentric disc are driven to rotate respectively, and therefore the spider hands are driven to rotate; compared with an existing spider hand transmission mechanism, the spider hand transmission mechanism is smaller in size, does not need extra power input and can be suitable for various old cigarette making machines.

Description

TECHNICAL FIELD

[0001] The utility model relates to cigarette making machine equipment transmission production technical field, specifically for a spider hand internal transmission mechanism. BACKGROUND

[0002] In the production process of the cigarette making machine, the horizontal movement of the cigarette needs to be converted into the circumferential movement of the drum rotation after the cigarette is formed. The existing cigarette equipment (such as ZJ70, ZJ112 / 114 / 118) all use oil lubricated spider hands to realize this function. However, the old oil lubricated spider hands often leak oil, which pollutes the cigarette in the production process and affects the quality of the cigarette.

[0003] The patent with the application number 202321452303.8 discloses a oil-free spider hand cigarette conveying device. This patent uses an oil-free spider hand with an external gear box and an eccentric mechanism. This method needs to change the original driving synchronous pulley fixing structure of the cigarette making machine, and uses two synchronous belts to transmit power, which is complex to install and debug. The latest M5E cigarette making machine uses an independent motor drive, which can adapt to the oil-free spider hand structure. However, due to the limitation of the structure of the old cigarette making machine, it is not possible to install an independent motor drive, which makes it impossible to install the oil-free spider hand in the patent, affecting the practical application of the oil-free spider hand. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a spider hand internal transmission mechanism that can be installed on the existing old cigarette making machine after modification.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A spider hand internal transmission mechanism, comprising a synchronous pulley, the synchronous pulley is connected with an external power source through a synchronous belt, the synchronous pulley is fixedly connected with a rotating wheel body, the rotating wheel body is internally provided with a cavity; a plurality of through holes are uniformly arranged on the front end of the rotating wheel body along the central axis, and an eccentric shaft is rotatably connected in each through hole; an arm is connected to the front end of the eccentric shaft, and an eccentric disc is rotatably connected to the rear end of the eccentric shaft; an eccentric driving block is arranged in the eccentric disc, and the eccentric driving block is connected with the rotating wheel body through a differential gear set.

[0007] Preferably, the rotating wheel body comprises a front wheel body, the front wheel body is a barrel-shaped structure with a bottom at the front end; a rear wheel body is coaxially and fixedly connected to the rear end opening of the front wheel body, the rear wheel body is a cylindrical structure with openings at both ends; a rear cover is coaxially and fixedly connected to the rear end opening of the rear wheel body, and the rear cover is coaxially and fixedly connected with the synchronous pulley.

[0008] Preferably, the differential gear set comprises a driving bevel gear coaxially fixedly connected with the rear cover through the connecting shaft; a pair of intermediate bevel gears are arranged in cooperation with the driving bevel gear, the pair of intermediate bevel gears are coaxially and symmetrically arranged and are simultaneously meshingly connected with the driving bevel gear; a driven bevel gear is coaxially arranged with the driving bevel gear and is meshingly connected with the two intermediate bevel gears respectively;

[0009] Preferably, the eccentric driving block is internally provided with a mounting hole, a central axis of the mounting hole is parallel to but different from a central axis of the eccentric driving block; a main shaft is coaxially arranged through an inner central hole of the driven bevel gear, the other end of the main shaft passes through the mounting hole of the eccentric driving block, and a central axis of the main shaft is parallel to but different from the central axis of the eccentric driving block.

[0010] Preferably, the eccentric shaft comprises an eccentric connecting rod, a central axis of the eccentric connecting rod is parallel to but different from a central axis of the eccentric shaft; a plurality of through holes are uniformly arranged on the eccentric disc along the central axis, and the eccentric connecting rod is rotationally connected with the eccentric disc through the through holes.

[0011] Preferably, the arm is internally provided with a belt transmission structure, the belt transmission structure comprises a main belt shaft and a slave belt shaft connected through a transmission belt; the suction claw is fixedly connected to the slave belt shaft, and a transmission ratio of the main belt shaft and the slave belt shaft is 1:2.

[0012] Preferably, a gear box cover is arranged in the rotating wheel body, the gear box cover cooperates with the rear cover to form a differential gear box, and the differential gear set is arranged in the differential gear box.

[0013] The spider hand provided by the present application has the following beneficial effects:

[0014] On the basis of one power input, the present application sets a set of grease-lubricated differential gear set structure, so that one power input can be converted into two coaxial power outputs with opposite rotating directions; the two power outputs drive the rotating wheel body and the eccentric disc to synchronously rotate in opposite directions, so that the suction claw on each arm of the spider hand performs an elliptical motion while performing a circular motion, thereby achieving the driving of the spider hand without an additional power source; the built-in gear box reduces the overall volume of the spider hand, so that the spider hand can be adaptively installed on an old cigarette machine for use without changing the existing equipment installation and fixing mode, realizing the oil-free of the internal transmission mechanism of the spider hand in the old cigarette machine, avoiding the risk of oil leakage and pollution of cigarettes, and facilitating installation and debugging. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The transmission mechanism explosion view of the present application;

[0016] Figure 2 The differential gear set structure explosion view of the present application;

[0017] Figure 3 This is a schematic diagram of the motion trajectory of the suction claw of this utility model.

[0018] In the diagram: 1. Synchronous pulley; 2. Rear cover; 3. Drive bevel gear; 4. Intermediate bevel gear; 5. Driven bevel gear; 6. Main shaft; 7. Gearbox cover; 8. Rear wheel body; 9. Eccentric disc; 10. Eccentric drive block; 11. Eccentric shaft; 12. Front wheel body; 13. Arm; 14. Suction claw. Detailed Implementation

[0019] The following is a further explanation of the present invention in conjunction with specific embodiments, such as... Figure 1 As shown, this embodiment is an internal transmission mechanism for a spider hand, including a synchronous pulley 1; the synchronous pulley 1 is connected to an external power source through a synchronous belt, and the power source includes, but is not limited to, the power of the cigarette machine itself and external servo motors, stepper motors, etc.

[0020] The synchronous pulley 1 is coaxially fixedly connected to a rotating wheel body, which is a hollow cylindrical structure including a front wheel body 12, a rear wheel body 8, and a rear cover 2. The synchronous pulley 1 and the rear cover 2 are coaxially fixedly connected. When the synchronous pulley 1 rotates under the action of an external power source, it can drive the entire rotating wheel body to rotate around the axis in the same direction and at the same speed.

[0021] A differential gear set is installed inside the rotating wheel body. The differential gear set includes a drive bevel gear 3, which is fixedly connected to the rear cover 2 via a connecting shaft. Figure 2 As shown, the driving bevel gear 3 is meshed with a pair of intermediate bevel gears 4. The two intermediate bevel gears 4 are arranged symmetrically relative to each other, and their central axes are engaged with the driving bevel gear 3 at a 90-degree angle. A driven bevel gear 5 is arranged coaxially with the driving bevel gear 3, and the driven bevel gear 5 is also meshed with the two intermediate bevel gears 4. When the driving bevel gear 3 is driven by the rear cover 2 to rotate around its axis, it will transmit the rotation to the driven bevel gear 5 under the action of the two intermediate bevel gears 4. The rotation direction of the driven bevel gear 5 is opposite to the rotation direction of the driving bevel gear 3, but the rotation speed is the same.

[0022] A gearbox cover 7 is provided inside the rotating wheel body. The gearbox cover 7 and the rear cover 2 cooperate to form a differential gearbox structure, which includes the differential gear set. Grease lubrication is used inside the differential gearbox, and oil seal structures are provided at both the front and rear ends to ensure that it does not come into contact with cigarettes from the outside.

[0023] The eccentric driving block 10 is internally provided with a mounting hole, through which a main shaft 6 is arranged, which is fixedly arranged and will not rotate with other components; the outer diameter of the eccentric driving block 10 is fixedly connected with a driven bevel gear 5 through an oil seal (not shown in the figure) and a gear box cover 7, the main shaft 6 is coaxially rotatably connected with the driven bevel gear 5; the central axis of the eccentric driving block 10 is parallel to but not coaxial with the main shaft 6, so that the main shaft 6 and the eccentric driving block 10 are eccentrically connected; as shown in Figure 1 , the eccentric driving block 10 is mounted in the interior of the eccentric disc 9 through a bearing, when the eccentric driving block 10 is driven to rotate by the driven bevel gear 5, the eccentric disc 9 will also rotate together.

[0024] The eccentric disc 9 is circumferentially provided with a plurality of through holes along the central axis, each of which is rotatably connected with an eccentric shaft 11 through a bearing; the eccentric shaft 11 is provided with an eccentric connecting rod, the central axis of the eccentric connecting rod is parallel to but not coaxial with the main body of the eccentric shaft 11, and is eccentrically matched; the eccentric connecting rod is mounted in the through hole on the eccentric disc 9 through a bearing, when the eccentric disc 9 rotates, the eccentric connecting rod will also rotate, thereby driving the eccentric shaft 11 to rotate.

[0025] The front wheel body 12 is circumferentially provided with a plurality of through holes along the central axis, each of which is provided with a bearing; the through holes on the front wheel body 12 are matched with the through holes on the eccentric disc 9, so that each eccentric shaft 11 can extend out of the rotating wheel body through the through hole on the front wheel body 12 and rotatably cooperate with the front wheel body 12 through a bearing; since the front wheel body 12 keeps synchronous rotation with the rear wheel body 8, the rear cover 2 and the synchronous pulley 1, the eccentric shaft 11 will also rotate around the central axis of the front wheel body 12; under the self-rotation of the front wheel body 12 and the driving effect of the eccentric disc 9, the eccentric shaft 11 will not only rotate around the main shaft 6 in the same direction as the synchronous pulley 1, but also self-rotate in the opposite direction at the same speed.

[0026] The arm 13 is connected to the front end of the eccentric shaft 11, and a set of belt transmission structure is arranged in the arm 13, including a main belt shaft rotatably connected with the eccentric shaft 11, the main belt shaft is connected with a slave belt shaft through a transmission belt, and the transmission ratio of the main belt shaft and the slave belt shaft is 1:2; the slave belt shaft is connected with a suction claw 14, which can rotate around the main shaft 6 together with the eccentric shaft 11, and can also be driven by the slave belt shaft to self-rotate in the opposite direction, and due to the transmission ratio of the belt transmission structure in the arm 13, the suction claw 14 can remain horizontal, and its running track is elliptical, as shown in Figure 3 .

[0027] In actual use, the synchronous belt wheel 1 is driven by an external power source to rotate clockwise, and synchronously drives the rear cover 2, the rear wheel body 8 and the front wheel body 12 connected therewith to rotate clockwise; when the front wheel body 12 rotates clockwise, the eccentric shaft 11 on the front wheel body 12 is also driven to rotate clockwise around the main shaft 6.

[0028] Meanwhile, the rear cover 2 rotates clockwise, and also drives the driving bevel gear 3 to rotate clockwise; after the transmission of the differential gear set, the clockwise rotation of the driving bevel gear 3 is converted into the same speed but reverse rotation transmission to the driven bevel gear 5; the driven bevel gear 5 rotates counterclockwise, and drives the eccentric disc 9 to rotate counterclockwise, thereby driving the eccentric shaft 11 to rotate counterclockwise around its own axis; the eccentric shaft 11 rotates counterclockwise, and also drives the arm 13 provided thereon to rotate counterclockwise; since the arm 13 is provided with a belt transmission structure with a transmission ratio of 1:2, the suction claw 14 can remain horizontal, and its movement track presents an elliptical shape.

[0029] The above description is only further explanation and description of the present application combined with specific embodiments, and all the description does not represent limitation on the protection scope of the present application, any change or alternative scheme easily thought by any person skilled in the art within the technical range disclosed by the present application should be covered in the protection scope of the present application, therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A spider hand internal drive mechanism comprising a synchronous pulley connected by a synchronous belt to an external power source, characterised in that: The synchronous pulley is fixedly connected with a rotating wheel body, and the rotating wheel body is internally provided with a cavity; a plurality of through holes are uniformly arranged on the front end of the rotating wheel body along the central axis, and an eccentric shaft is rotatably connected in each through hole; the front end of the eccentric shaft is connected with an arm, and the rear end is rotatably connected with an eccentric disc; an eccentric driving block is arranged in the eccentric disc, and the eccentric driving block is connected with the rotating wheel body through a differential gear set.

2. The spider hand internal drive mechanism of claim 1, wherein: The rotating wheel body comprises a front wheel body which is a barrel-shaped structure with a bottom at the front end; a rear wheel body is coaxially and fixedly connected at the rear end opening of the front wheel body, and the rear wheel body is a cylindrical structure with openings at both ends; a rear cover is coaxially and fixedly connected at the rear end opening of the rear wheel body, and the rear cover is coaxially and fixedly connected with the synchronous pulley.

3. The spider hand internal drive mechanism of claim 2, wherein: The differential gear set comprises a driving bevel gear which is coaxially and fixedly connected with the rear cover through a connecting shaft; a pair of intermediate bevel gears are arranged in cooperation with the driving bevel gear, and the pair of intermediate bevel gears are coaxially and symmetrically arranged and simultaneously connected with the driving bevel gear; a driven bevel gear is coaxially arranged with the driving bevel gear, and the driven bevel gear is connected with the two intermediate bevel gears respectively.

4. The spider hand internal drive mechanism of claim 3, wherein: An installation hole is arranged in the eccentric driving block, and the central axis of the installation hole is parallel to but different from the central axis of the eccentric driving block; a main shaft is coaxially arranged through the inside central hole of the driven bevel gear, the other end of the main shaft passes through the installation hole of the eccentric driving block, and the central axis of the main shaft is parallel to but different from the central axis of the eccentric driving block.

5. The spider hand internal drive mechanism of claim 4, wherein: The eccentric shaft comprises an eccentric connecting rod, and the central axis of the eccentric connecting rod is parallel to but different from the central axis of the eccentric shaft; a plurality of through holes are uniformly arranged on the eccentric disc along the central axis, and the eccentric connecting rod is rotatably connected with the eccentric disc through the through holes.

6. The spider hand internal drive mechanism of claim 5, wherein: A belt transmission structure is arranged in the arm, and the belt transmission structure comprises a main belt shaft and a slave belt shaft which are connected through a transmission belt; a suction claw is fixedly connected to the slave belt shaft, and the transmission ratio of the main belt shaft and the slave belt shaft is 1:

2.

7. The spider hand internal drive mechanism of claim 3, wherein: A gear box cover is arranged in the rotating wheel body, the gear box cover cooperates with the rear cover to form a differential gear box, and the differential gear set is arranged in the differential gear box.

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