Long strip pulling mechanism

Abstract

The utility model relates to a long strip pulling mechanism, in particular to the technical field of pencil production. The automatic pen pulling device comprises a machine frame, two driven shafts, two driving shafts, two pen pulling belts, a belt synchronous transmission mechanism, an elastic pressing plate and a guide bearing set, the two driven shafts are installed on the machine frame and arranged in parallel in an up-down corresponding mode, the two driving shafts are installed on the machine frame and arranged in parallel in an up-down corresponding mode, the two pen pulling belts are used for pulling, and the two belts both have power. The two belts are opposite in rotating direction and consistent in rotating speed, the plastic pen is pulled out by increasing one time of pulling force and resultant force, the contact area between the two belts and the plastic pen is greatly increased, great friction force can be increased, and the slipping phenomenon is reduced; the inner sides of the pen pulling belts are pressed towards the middle of the two belts to ensure that the belts fully clamp a plastic pen holder, the distance between the two driving shafts is adjustable so that the distance of the two pen pulling belts clamping the plastic pen can be freely adjusted, the pen pulling device can adapt to the plastic pens with different thicknesses, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pencil production, in particular to a long strip pulling mechanism. Background Art

[0002] The production process of plastic pencils is that the pen holder and the lead core are directly formed at one time by the extruder. The extruded pen holder is a continuous and slender pen strip. Most of the existing equipment is a turntable rotation pull-out method. This method has a small contact surface, cannot achieve full clamping, and is prone to slippage. In addition, this method cannot achieve the pull-out of plastic pencils of different specifications, and has poor practicality. Utility Model Content

[0003] (1) Technical solution

[0004] In order to solve the above technical problems, the utility model provides a long strip pulling mechanism, including a frame, two driven shafts installed on the frame in corresponding parallel arrangement up and down, two driving shafts installed on the frame in corresponding parallel arrangement up and down, two pen pulling belts, a belt synchronous transmission mechanism, an elastic pressure plate and a guide bearing group. The driving shaft is driven by the belt synchronous transmission mechanism, and the transmission directions of the two driving shafts are opposite. The pen pulling belt is wrapped around the driven shaft and the driving shaft and the two pen pulling belts are arranged in parallel. The elastic pressure plate capable of pressing the inner side of the pen pulling belt toward the middle of the two pen pulling belts is provided in the pen pulling belt, and the guide bearing group is provided on both sides between the two pen pulling belts.

[0005] Preferably, the belt synchronous transmission mechanism includes a sun gear, a planetary gear, two sprockets, a chain, two mounting plates, and a driving motor, one end of the driving shaft of one of the two driving shafts passes through the frame and is fixedly connected to the sun gear, and the sun gear is driven by the driving motor, the planetary gear is mounted on one of the mounting plates, and the planetary gear and the sun gear are meshed with each other, one of the sprockets is mounted on the other mounting plate, one end of the driving shaft of the other of the two driving shafts passes through the frame and is fixedly connected to the other sprocket, the two sprockets are connected by the chain, and a fixed shaft is connected between the center position of one of the sprockets and the center position of the planetary gear.

[0006] Preferably, another of the mounting plates is provided with an arc-shaped groove and is fixed to the frame by bolts engaging with the arc-shaped groove.

[0007] Preferably, the elastic pressure plates in the two pen-pulling straps are symmetrically distributed.

[0008] Preferably, the elastic pressure plate includes a connecting plate, a pressure plate, a guide rod and a spring. The connecting plate is fixed on the frame. Two guide rods pass through the connecting plate. One end of the guide rod is connected to the pressure plate. The spring is sleeved on the guide rod between the connecting plate and the pressure plate.

[0009] Preferably, a surface of the pressing plate away from the guide rod is closely attached to the inner side of the pen-drawing belt.

[0010] (2) Beneficial effects

[0011] The utility model provides a long strip pulling mechanism. Compared with the prior art, the utility model has the following advantages:

[0012] Beneficial effects:

[0013] 1. Pull the pen through two pen-pulling belts. Both belts are powered. The two belts rotate in opposite directions and at the same speed, which doubles the pulling force. The plastic pen is pulled out together, and the contact area with the plastic pen is greatly increased, which can greatly increase the friction and reduce slipping. At the same time, an elastic pressure plate is set to press the inner side of the pen-pulling belt toward the middle of the two belts to ensure that the belt fully clamps the plastic pen.

[0014] 2. The distance between the two active shafts is adjustable, so that the distance between the two pen-pulling belts clamping the plastic pens can be freely adjusted, which can adapt to plastic pens of different thicknesses and improve practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the utility model.

[0016] Figure 2 It is a rear view of the utility model.

[0017] The accompanying drawings are marked as: 1-frame, 2-driven shaft, 3-driving shaft, 4-pen pull belt, 5-belt synchronous transmission mechanism, 51-sun gear, 52-planetary gear, 53-sprocket, 54-chain, 55-mounting plate, 56-driving motor, 6-elastic pressure plate, 61-connecting plate, 62-pressure plate, 63-guide rod, 64-spring, 7-guide bearing group. DETAILED DESCRIPTION

[0018] The utility model is further described in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1 , 2As shown, a long strip pulling mechanism described in the utility model includes a frame 1, two driven shafts 2 correspondingly arranged in parallel up and down mounted on the frame 1, two driving shafts 3 correspondingly arranged in parallel up and down mounted on the frame 1, two pen-pulling belts 4, a belt synchronous transmission mechanism 5, an elastic pressure plate 6 and a guide bearing group 7, the driving shaft 3 is driven by the belt synchronous transmission mechanism 5, the transmission directions of the two driving shafts 3 are opposite, and the distance between the two driving shafts 3 is adjustable; the pen-pulling belt 4 is wrapped around the driven shaft 2 and the driving shaft 3 and the two pen-pulling belts 4 are arranged in parallel, the pen-pulling belts 4 are each provided with the elastic pressure plate 6 capable of pressing the inner side thereof toward the middle of the two pen-pulling belts 4, the guide bearing group 7 is provided on both sides between the two pen-pulling belts 4, a total of 4 groups of guide bearing groups 7 are provided, 2 groups on each side between the two pen-pulling belts 4, and the guide bearing group 7 can move forward and backward to adjust the position of the plastic pen in the pen-pulling belt 4.

[0020] The belt synchronous transmission mechanism 5 includes a sun gear 51, a planetary gear 52, two sprockets 53, a chain 54, two mounting plates 55, and a driving motor 56. One end of the driving shaft 3 of one of the two driving shafts 3 passes through the frame 1 and is fixedly connected to the sun gear 51. The sun gear 51 is driven by the driving motor 56. The planetary gear 52 is mounted on one of the mounting plates 55. The planetary gear 52 and the sun gear 51 are meshed with each other. One of the sprockets 53 is mounted on the other mounting plate 55. One end of the driving shaft 3 of the other of the two driving shafts 3 passes through the frame 1 and is fixedly connected to the other sprocket 53. The two sprockets 53 are connected by the chain 54. A fixed shaft is connected between the center position of one of the sprockets 53 and the center position of the planetary gear 52.

[0021] The other mounting plate 55 is provided with an arc groove and is fixed to the frame 1 by means of bolts cooperating with the arc groove. By setting the arc groove, the other mounting plate 55 can be rotated around the arc groove to adjust the angle, thereby enabling the belt synchronous transmission mechanism 5 to rotate a certain angle. When the spacing between the two pen-pulling belts 4 is adjusted, the belt synchronous transmission mechanism 5 can adjust the angle of the planetary gear 52 at the same time.

[0022] The elastic pressure plates 6 in the two pen-pulling straps 4 are symmetrically distributed, and the elastic pressure plates 6 include a connecting plate 61, a pressure plate 62, a guide rod 63, and a spring 64. The connecting plate 61 is fixed on the frame 1, and two guide rods 63 are passed through the connecting plate 61. One end of the guide rod 63 is connected to the pressure plate 62, and the spring 64 is sleeved on the guide rod 63 between the connecting plate 61 and the pressure plate 62. The side of the pressure plate 62 away from the guide rod 63 is tightly fitted to the inner side of the pen-pulling strap 4.

[0023] Working principle: Start the driving motor 56 to drive the sun gear 51 to rotate and drive one of the driving shafts 3 to rotate. The sun gear 51 is a driving wheel coaxial with one of the driving shafts 3. The sun gear 51 meshes with the driving planetary gear 52 to transmit power to a pair of sprockets 53 and finally synchronously drive the other driving shaft 3. The transmission directions of the two driving shafts 3 are opposite, so that the two pen-pulling belts 4 rotate in opposite directions and rotate at the same speed, and the plastic pen is pulled out with a combined force. By setting an elastic pressure plate 6, the inner side of the pen-pulling belt 4 is pressed toward the middle of the two belts to ensure that the belt fully clamps the plastic pen holder.

[0024] The above-mentioned embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but the utility model is not limited to these embodiments. It should be pointed out that for ordinary technicians in this field. Under the premise of not departing from the purpose of the utility model, any improvement made shall fall within the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A strip pulling mechanism, characterized in that: The invention comprises a frame (1), two driven shafts (2) mounted on the frame (1) and arranged in parallel with each other, two driving shafts (3) mounted on the frame (1) and arranged in parallel with each other, two pen-drawing belts (4), a belt synchronous transmission mechanism (5), an elastic pressure plate (6) and a guide bearing group (7), wherein the driving shaft (3) is driven by the belt synchronous transmission mechanism (5), and the two driving shafts (3) have opposite transmission directions. The pen-drawing belt (4) is wrapped around the driven shaft (2) and the driving shaft (3), and the two pen-drawing belts (4) are arranged in parallel. The elastic pressure plate (6) capable of pressing the inner side of the pen-drawing belt (4) toward the middle of the two pen-drawing belts (4) is provided in the pen-drawing belt (4), and the guide bearing group (7) is provided on both sides between the two pen-drawing belts (4).

2. A strip pulling mechanism according to claim 1, characterized in that: The belt synchronous transmission mechanism (5) comprises a sun gear (51), a planetary gear (52), two sprocket wheels (53), a chain (54), two mounting plates (55), and a driving motor (56); one end of the driving shaft (3) of one of the two driving shafts (3) passes through the frame (1) and is fixedly connected to the sun gear (51); the sun gear (51) is driven by the driving motor (56); one of the mounting plates (55) is mounted with the planetary gear (52); the planetary gear (52) and the sun gear (51) are meshed with each other; one of the sprocket wheels (53) is mounted on the other mounting plate (55); one end of the driving shaft (3) of the other of the two driving shafts (3) passes through the frame (1) and is fixedly connected to the other sprocket wheel (53); the two sprocket wheels (53) are connected by the chain (54); a fixed shaft is connected between the center position of one of the sprocket wheels (53) and the center position of the planetary gear (52).

3. A strip pulling mechanism according to claim 2, characterized in that: The other mounting plate (55) is provided with an arc groove and is fixed to the frame (1) through the cooperation of bolts with the arc groove.

4. A strip pulling mechanism according to claim 1, characterized in that: The elastic pressing plates (6) in the two pen-drawing belts (4) are symmetrically distributed.

5. A strip pulling mechanism according to claim 4, characterized in that: The elastic pressure plate (6) comprises a connecting plate (61), a pressure plate (62), a guide rod (63), and a spring (64); the connecting plate (61) is fixed on the frame (1); two guide rods (63) are passed through the connecting plate (61); one end of the guide rod (63) is connected to the pressure plate (62); and the spring (64) is sleeved on the guide rod (63) between the connecting plate (61) and the pressure plate (62).

6. A strip pulling mechanism according to claim 5, characterized in that: The side of the pressing plate (62) away from the guide rod (63) is closely attached to the inner side of the pen-drawing belt (4).

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