Swivel device

Abstract

Swivel device with a base body (11) having a mounting part (12) by which the base body (11) is fastened to a mounting surface, and a turret (14) which can be rotated relative to the base body (11), a movable body (21) having an output end (22) and a movement end (23), wherein the movable body (21) is eccentrically connected to the turret (14) by the output end (22), wherein the movement end (23) of the movable body (21) can be connected to a pivoting body (41), and with a drive unit (31) which is arranged on one side of the base body (11) and can drive the turret (14) of the base body (11) in rotation, characterized in that the drive unit (31) includes a push rod (311) that can be moved in the transverse direction, wherein a transversely displaceable body (312) is provided below the push rod (311), wherein, when the push rod (311) of the drive unit (31) is moved back and forth in the transverse direction, the transversely displaceable body (312) can be moved back and forth synchronously in the transverse direction, wherein a gear wheel (13) is arranged in the base body (11) that engages with the transversely displaceable body (312), wherein the gear wheel (13) has a gear shaft (131) in the middle that projects from the base body (11) and is connected to the turret (14), and the movement end (23) of the movable body (21) is connected to a pressure element (231) for the pivoting body (41), wherein, when the pressure element (231) at the movement end (23) of the movable body (21) is connected to the pivoting body (41), when the turret (14) is rotated by the output end (22) of the movable body (21) which is eccentrically connected to the turret (14) in an articulated manner, the movement end (23) of the movable body (21) and the pressure element (231) only move up and down, so that the movement end (23) of the movable body (21) and the pressure element (231) generate a linear simple harmonic movement through the turret (14).

Description

Technical area

[0001] The invention relates to a pivoting device that can generate a simple harmonic motion. State of the art

[0002] A conventional plastic feed machine can melt the input plastic and discharge the molten plastic mass through a discharge section. A mold is located below the discharge section to collect and shape the discharged plastic mass.

[0003] During molding, the mold must be moved transversely to demold the molded part. Since the distance between the discharge part of the plastic feeding machine and the mold is fixed, the plastic mass continuously discharged from the discharge part by gravity may adhere to the mold during transverse movement of the mold, thus affecting work efficiency.

[0004] This makes a plastics feeder available on the market whose discharge part can be moved upward relative to the mold. This allows the distance between the discharge part and the mold to be increased, preventing the discharged plastic from sticking to the mold. This plastics feeder uses a drive that can move the discharge part relative to the mold. The movement of the discharge part can generate vibration. Furthermore, the components may collide and become sealed. This can affect work efficiency and service life.

[0005] Document DE 199 48 916 A1 describes a drive mechanism for moving a cutting tool or a pitch control rod in a spring forming machine and discloses a conventional pivoting device.

[0006] Document DE 691 23 305 T2 shows a conventional blow molding machine and document JP H05 - 185 497 A discloses a method and an apparatus for cutting a preform in a blow molding machine, wherein the preform is stretched by a vertical relative movement of a crosshead and a mold, whereby the cutting edge becomes horizontal. Object of the invention

[0007] The invention is based on the object of creating a pivoting device which can generate a simple harmonic motion, whereby a damping effect can be achieved at the upper and lower end points of the up and down movement.

[0008] This object is achieved by the swivel device according to the invention according to claim 1, which comprises: a base body having a mounting part by which the base body is fixed to a mounting surface, and a turret which can be rotated relative to the base body, a movable body having an output end and a movement end, the movable body being eccentrically connected to the turret by the output end, wherein the moving end of the movable body can be connected to a swivel body, anda drive unit which is arranged on one side of the base body and can rotationally drive the turret of the base body, whereby the moving end of the movable body is moved up and down only when the moving end of the movable body is connected to the swivel body, so that the moving end of the movable body generates a jerk, ie a linear simple harmonic motion, through the turret.

[0009] The movement end of the movable body is connected to a pressure element for the swivel body.

[0010] According to the invention, the drive unit includes a push rod that can be moved in the transverse direction, wherein a transversely displaceable body is provided under the push rod, wherein, when the push rod of the drive unit is moved back and forth in the transverse direction, the transversely displaceable body can be moved back and forth synchronously in the transverse direction, wherein a gear wheel is arranged in the base body, which gear wheel engages with the transversely displaceable body, wherein the gear wheel has a gear shaft in the middle, which protrudes from the base body and is connected to the turret.

[0011] Preferably, the transversely displaceable body is formed by a chain.

[0012] Preferably, the turret has a central mounting hole on the side facing the gear shaft and an eccentric mounting hole on the side facing away from the gear shaft, wherein the turret is connected by the central mounting hole to the gear shaft protruding from the base body, whereby the turret can be rotated synchronously by the gear wheel, wherein the movable body is articulated by the output end to the eccentric mounting hole of the turret.

[0013] Preferably, the movement end is connected to the underside of a plastics feed machine, the plastics feed machine having an input part, a conveying part and a discharge part, the conveying part being located between the input part and the discharge part, the plastics entering from the input part into the conveying part and being melted there, the conveying part transporting the plastics mass to the discharge part, a support element being articulated on the underside of the plastics feed machine, the pivoting device being located next to the support element, the movement end of the movable body being connected to the underside of the plastics feed machine, and when the output end of the movable body is rotated by the drive unit, the movement end is moved up and down so that the plastics feed machine can be pivoted about the support element.

[0014] Preferably, the support element has a fastening end and a hinge end, wherein the fastening end is fastened to a flat surface, wherein the hinge end of the support element is hingedly connected to the underside of the plastics feed machine.

[0015] Preferably, when the output end of the movable body is brought from the turret to the lowest end point of the turret, the bottom of the plastic feeding machine is parallel to the plane surface. Short description of the drawings Fig. 1 an exploded view of the invention, Fig. 2 a plan view of the invention, Fig. 3 a representation of the movement of the drive unit of the invention, Fig. 4 a representation of the power transmission of the invention, Fig. 5 a representation of the application of the invention to a plastics feeding machine, Fig. 6 shows the application of the invention to a plastics feed machine, wherein the plastics feed machine is pushed upwards by the pivoting device, Fig. 7 is a view showing the movement path of the movable body of the invention. Ways to implement the invention

[0016] As can be seen from the Fig. 1 to 3, the invention comprises a base body (11), a movable body (21) and a drive unit (31).

[0017] The base body (11) has a mounting part (12) on its underside, by means of which the base body (11) is fastened to a mounting surface (not shown). A gear wheel (13) is arranged in the base body (12). The gear wheel (13) has a gear shaft (131) in the center, which protrudes from the base body (11) and is connected to a turret (14). The turret (14) has a central mounting hole (141) on the side (131) facing the gear shaft (131) and an eccentric mounting hole (142) on the side facing away from the gear shaft (131). The turret (14) is connected by the central mounting hole (141) to the gear shaft (131) protruding from the base body (11), whereby the turret (14) can be rotated synchronously by the gear wheel (13).

[0018] The movable body (21) has an output end (22) and a movement end (23). The movable body (21) is pivotally connected to the eccentric mounting hole (142) of the turret (14) via the output end (22). The movement end (23) of the movable body (21) is pivotally connected to a pressure element (231) for a pivoting body (not shown).

[0019] The drive unit (31) is arranged on one side of the base body (11). In the present embodiment, the drive unit is formed by a pneumatic cylinder.

[0020] The drive unit (31) includes a push rod (311) that can be moved in the transverse direction. Provided below the push rod (311) is a transversely displaceable body (312) formed by a chain and parallel to the push rod (311). The gear wheel (13) engages with the transversely displaceable body (312). When the push rod (311) of the drive unit (31) is moved back and forth in the transverse direction, the transversely displaceable body (312) can be moved back and forth synchronously in the transverse direction. Since the transversely displaceable body (312) engages with the gear wheel (13), the transversely displaceable body (312) can rotate the drive wheel (13) and the turret (14) synchronously around the gear shaft (131) at the same speed.Since the output end (22) of the movable body (21) is eccentrically connected to the turret (14), the moving end (23) of the movable body (21) can only be moved up and down if the pressure element (231) at the moving end (23) of the movable body (21) is connected to the pivoting body (41). As can be seen from . Fig. As can be seen in Figure 4, the turret (14) can move the movable body along with it when rotating, causing the movable body (21) to perform a circular motion, so that the movement end (23) of the movable body (21) and the pressure element (231) generate a jerk, ie, a linear simple harmonic motion. This allows a damping effect to be achieved at the upper and lower ends of the up and down movement.

[0021] In the Fig. 5 and Fig. 6, the invention is applied to a plastics feed machine (51). The plastics feed machine (51) has a bottom side (52), an input part (53), a conveying part (54), and a discharge part (55). The conveying part (54) is located between the input part (53) and the discharge part (54). The plastic enters the conveying part (54) from the input part (53) and is melted there. The conveying part (54) transports the plastic mass to the discharge part (55). A mold (56) which collects the plastic mass is arranged below the discharge part (55). A support element (57) is articulated on the bottom side (52) of the plastics feed machine (51). The support element (57) has a fastening end (571) and a joint end (572). The fastening end (571) is fastened to a flat surface (61). The articulated end (572) of the support element (57) is articulated to the underside (52) of the plastic feed machine (51).

[0022] The mounting part (12) is mounted on the flat surface (61) and is located adjacent to the support element (57). The pressure element (231) at the travel end (23) of the movable body (21) is secured to the underside (52) of the plastic feed machine (51) by a plurality of fastening elements (not shown). When the output end (22) of the movable body (21) is moved by the turret (14) to the lowest end point of the turret (14), the underside (52) of the plastic feed machine (51) is parallel to the flat surface (61). When the movable body (21) makes a circular movement by rotating the turret (14), the moving end (23) of the movable body (21) and the pressing member (231) can be moved up and down, thereby generating a pressing force and a pulling force for the bottom (52) of the plastic feeding machine (51), so that the plastic feeding machine (51) is pivoted back and forth around the supporting member (57).By pivoting the plastics feed machine (51) back and forth around the support element (57), the distance between the discharge part (55) and the mold (56) can be varied. When the mold (56) is moved away in the transverse direction, the discharge part (55) is raised, increasing the distance (h) between the discharge part (55) and the mold (56). This prevents the plastics mass continuously discharged by gravity from adhering to the mold (56).

[0023] Since the movable body (21) is eccentrically connected to the turret (14) and the pressure element (231) is attached to the movement end (23) on the underside (52) of the plastic feed machine (51), the movement end (23) can only move up and down. When the turret (14) is rotated by the drive unit (31), the movement end (23) of the movable body (21) and the pressure element (231) generate a jerk relative to the turret (14), i.e., a linear simple harmonic motion (Simple Harmonic Motion).

[0024] As from Fig.As can be seen from Fig. 7, the movable body (21) (not shown) performs a circular motion counterclockwise along a circular path R. When the movable body (21) reaches the upper and lower end points A, B of the circular path R, the moving speed in the vertical direction is zero, i.e., V=0 (lowest). As the movable body (21) moves along the circular path R from the lower end point B to the left point C, the speed in the vertical direction is increased, i.e., V3>V2>V1 (gradually increased). When the movable body (21) reaches the left point C of the circular path R, the speed in the vertical direction reaches the maximum value, i.e., V=MAX (highest).

[0025] Specifically, when the drive end 22 of the movable body 21 is moved from the lower end point to one side and then to the upper end point of the turret (14), the movement speed is low → high → low. As a result, the discharge part (55) of the plastic feeding machine (51) is pivoted accordingly, so that a damping effect is generated at the upper and lower end points of the up and down movement. Therefore, a damping effect can be generated at the closest and farthest positions from the mold (56), thereby reducing the pivoting speed, so that impact of the discharge part (55) against the mold (56) due to excessive inertia force is avoided. Furthermore, vibration can be reduced, so that the service life is extended.

[0026] The swivel device according to the invention has a simple design and can generate a damping effect through simple harmonic motion. This eliminates the need for manual or computer-assisted control, significantly reducing control costs.

Claims

[1] Swivel device with a base body (11) having a mounting part (12) by which the base body (11) is fastened to a mounting surface, and a turret (14) which can be rotated relative to the base body (11), a movable body (21) having an output end (22) and a movement end (23), wherein the movable body (21) is eccentrically connected to the turret (14) by the output end (22), wherein the movement end (23) of the movable body (21) can be connected to a pivoting body (41), and with a drive unit (31) which is arranged on one side of the base body (11) and can drive the turret (14) of the base body (11) in rotation, characterized by , that the drive unit (31) includes a push rod (311) that can be moved in the transverse direction, wherein a transversely displaceable body (312) is provided below the push rod (311), wherein, when the push rod (311) of the drive unit (31) is moved back and forth in the transverse direction, the transversely displaceable body (312) can be moved back and forth synchronously in the transverse direction, wherein a gear wheel (13) is arranged in the base body (11) that engages with the transversely displaceable body (312), wherein the gear wheel (13) has a gear shaft (131) in the middle that projects from the base body (11) and is connected to the turret (14), and the movement end (23) of the movable body (21) is connected to a pressure element (231) for the pivoting body (41), wherein, when the pressure element (231) at the movement end (23) of the movable body (21) is connected to the pivoting body (41), when the turret (14) is rotated by the output end (22) of the movable body (21) which is eccentrically connected to the turret (14) in an articulated manner, the movement end (23) of the movable body (21) and the pressure element (231) only move up and down, so that the movement end (23) of the movable body (21) and the pressure element (231) generate a linear simple harmonic movement through the turret (14). [2] Swivel device according to claim 1, characterized by that the transversely displaceable body (312) is formed by a chain. [3] Swivel device according to claim 1, characterized bythat the turret (14) has a central mounting hole (141) on the side facing the gear shaft (131) and an eccentric mounting hole (142) on the side facing away from the gear shaft (131), wherein the turret (14) is connected by the central mounting hole (141) to the gear shaft (131) projecting from the base body (11), whereby the turret (14) can be rotated synchronously by the gear wheel (13), wherein the movable body (21) is connected in an articulated manner to the eccentric mounting hole (142) of the turret (14) by the output end (22). [4] Swivel device according to claim 1, characterized bythat the movement end (23) is connected to the underside (52) of a plastics feed machine (51), wherein the plastics feed machine (51) has an input part (53), a conveying part (54) and a discharge part (55), wherein the conveying part (54) is located between the input part (53) and the discharge part (54), wherein the plastic enters from the input part (53) into the conveying part (54) and is melted there, wherein the conveying part (54) transports the plastic mass to the discharge part (55), wherein a support element (57) is articulated on the underside (52) of the plastics feed machine (51), wherein the pivoting device is located next to the support element (57), wherein the movement end (23) of the movable body (21) is connected to the underside (52) of the plastics feed machine (51), wherein when the output end (22) of the movable body (21) is driven by the drive unit (31) is rotated, the movement end (23) is moved up and down,so that the plastic feed machine (51) can be pivoted around the support element (57). [5] Swivel device according to claim 4, characterized by that the support element (57) has a fastening end (571) and a joint end (572), wherein the fastening end (571) is fastened to a flat surface (61), wherein the joint end (572) of the support element (57) is connected in an articulated manner to the underside (52) of the plastics feed machine (51). [6] Swivel device according to claim 5, characterized by that when the output end (22) of the movable body (21) is brought from the turret (14) to the lowest end point of the turret (14), the underside (52) of the plastics feed machine (51) is parallel to the plane surface (61).

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