Lower die linkage mechanism for bottle blowing machine

Abstract

The present invention provides a lower mold interlocking mechanism for a bottle blowing machine, comprising a frame, a pendulum shaft extending in a vertical direction and rotatably mounted on the frame around its own axis, a lower formwork mounted on the frame so as to be able to rise and fall, and a swing arm fixedly connected to the pendulum shaft and rotatable around the axis of the pendulum shaft, wherein the lower mold interlocking mechanism further comprises a cylindrical cam provided with a cylindrical cam groove, and a first rotor, the first rotor being mounted in the cylindrical cam groove so as to be able to move relatively in the extension direction of the cylindrical cam groove, the swing arm having a swing end, one of the first rotor and the cylindrical cam being mounted at the swing end, and the other being mounted on the lower formwork, the interlocking mechanism has a small number of components, a simple structure, and reliable operation.

Description

[Technical field]

[0001] The present invention relates to the technical field of bottle blowing, and in particular to a lower die interlocking mechanism of a bottle blowing machine. [Background technology]

[0002] Bottle blowing machine is an important equipment for manufacturing various liquid packaging bottles. The process of blowing off the bolts of the conventional bottle blowing machine is mainly composed of the following links: unlocking the two side molds, opening the two side molds and lowering the lower mold, picking up the bolts, feeding the blank, closing the two side molds and raising the lower mold, locking the two side molds, bottle blowing, etc. The opening and closing of the two side molds are controlled by the mold opening and closing cam. The specific implementation scheme is that when the bottle blowing mold unit passes through the mold opening and closing cam while rotating, the mold opening and closing cam drives the mold opening and closing swing arm and the mold opening and closing pendulum axis fixedly connected thereto to swing, and further drives the mold driving mechanism to open and close the two side molds, and the lifting and lowering of the lower mold is controlled by the lower mold cam. Such a scheme has high requirements for manufacturing, installation and trial operation, and it is difficult to meet the requirements for high-speed bottle blowing.

[0003] At present, in order to realize high-speed bottle blowing, it is usually linked with the lifting and lowering movement of the lower mold, the opening and closing movement of the side mold, or the swing of the mold opening and closing pendulum axis. At present, it can be mainly realized by the following linkage methods:

[0004] (1) One of the two side formworks and the lower formwork are connected by a hollow cylindrical cam pair. When the two side formworks swing oppositely to open and close oppositely, the hollow cylindrical cam pair drives the lower formwork to rise and fall, realizing the interlocking between the lower formwork and the side formwork. This interlocking mechanism does not require additional moving parts, has a simple structure, and is reliable in transmission. However, the distance of the cylindrical cam pair from the center position of the lower formwork is usually far, the loading conditions are poor, and one part of the cylindrical cam pair needs to be attached to the side formwork, which increases the size and mass of the side formwork and reduces the dynamic performance.

[0005] (2) The lower form is connected to the mold opening / closing swing arm via a link mechanism or a connecting rod cam combination mechanism, and the mold opening / closing cam drives the two side formworks to open and close oppositely via the mold opening / closing swing arm, while driving the lower formwork to rise and fall via the above-mentioned link mechanism or connecting rod cam combination mechanism, thereby realizing the interlocking between the lower formwork and the side formwork. Such an interlocking mechanism requires the addition of two or more moving parts, and the structure, movement and loading conditions are complicated, making it impossible to guarantee the overall reliability and service life of the interlocking mechanism, and making installation and maintenance difficult.

[0006] (3) The mold opening and closing pendulum axis and the lower formwork are connected using a spatial cam pair. When the mold opening and closing pendulum axis swings, the side formwork performs opening and closing movements, and the lower formwork performs rising and falling movements in sync, thereby realizing the linkage between the lower formwork and the side formwork. In this interlocking mechanism, the swing arm of the mold opening and closing pendulum shaft drives the lower mold to rise and fall, and because the rotor rotation radius at the end of the swing arm is small, the arc path of the rotor rotating at the same rotation angle is short, so that the spatial cam is difficult to design and difficult to realize, and at the same time, the curvature of the cam curve is small, so the rotor size is relatively small, and the load is difficult to apply, and in the process of the lower mold rising and falling in the axial direction (i.e. vertical direction) of the mold opening and closing pendulum shaft, a very large dynamic load is generated, and the vertical dynamic load generates a large vertical bending moment on the swing arm, which reduces the strength of the swing arm due to the vertical bending moment on the swing arm, so that the swing arm is bent in the vertical direction, which affects the normal contact between the cam rotor and the cam, and deteriorates the movement and dynamic characteristics of the lower mold. At the same time, the vertical bending moment on the swing arm is transmitted to the mold opening and closing pendulum shaft, which reduces the strength and rigidity of the mold opening and closing pendulum shaft, and affects its stability and service life. Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE PRESENT EMBODIMENT The present invention aims to provide a lower die linkage mechanism for a bottle blowing machine to solve one or more problems in the prior art. [Means for solving the problem]

[0008] In order to achieve the above objectives, the technical solutions used in the present invention are as follows: A lower mold linkage mechanism for a bottle blowing machine comprising: a frame; a pendulum shaft extending in a vertical direction and rotatably mounted on the frame around its own axis; a lower formwork mounted on the frame so as to be able to rise and fall; and a swing arm fixedly connected to the pendulum shaft and capable of swinging around the axis of the pendulum shaft as the pendulum shaft rotates, wherein the lower mold linkage mechanism further comprises a cylindrical cam provided with a cylindrical cam groove; and a first rotor, wherein the axis of the cylindrical cam and the axis of the pendulum shaft extend colinearly, the first rotor is provided in the cylindrical cam groove so as to be able to move relatively in the extension direction of the cylindrical cam groove, the swing arm has a swing end, one of the first rotor and the cylindrical cam is provided at the swing end and the other is provided on the lower formwork, the first rotor is cylindrical, and the axis of the first rotor and the axis of the pendulum shaft are perpendicular to each other.

[0009] In some embodiments, the first rotor is rotatably mounted in the cylindrical cam groove about its own axis.

[0010] In some embodiments, the first rotor is rotatably mounted on the swing end via a rotating shaft, and the cylindrical cam is fixedly mounted on the lower mold.

[0011] In some embodiments, the cylindrical cam is a partial cam having a circumferential arc of less than 360°.

[0012] In some embodiments, the lower form has a first side facing the pendulum axis and a second side away from the pendulum axis, and the cylindrical cam groove is located on the first side and the swing arm is located as a whole on the first side, or the cylindrical cam groove is located on the second side and the swing end of the swing arm is located on the second side.

[0013] In some embodiments, the cylindrical cam groove has a first end and a second end respectively provided at opposite ends of its extension direction, the cylindrical cam groove extends spirally upward from the first end to the second end, the swing arm has a first position and a second position, and in the process of the swing arm transforming from the first position to the second position with the rotation of the pendulum axis, the first rotor moves from the first end to the second end, and the lower formwork becomes lower in height.

[0014] In some embodiments, the lower mold interlocking mechanism further includes the guide sheet fixedly attached to the frame and the second rotor provided at the swing end, the guide sheet is provided with an arc groove, the arc extension orbit of the arc groove has the axis of the pendulum shaft as the rotation center line, the second rotor is provided in the arc groove so as to be able to move relatively in the extension direction of the arc groove, and the second rotor is supported in the vertical direction by the lower groove wall of the arc groove.

[0015] In some embodiments, the guide sheet includes a first guide and a second guide fixedly attached to the frame, the first guide and the second guide are spaced apart in the vertical direction, the lower surface of the first guide and the upper surface of the second guide are both perpendicular to the axis of the pendulum shaft, and the lower surface of the first guide and the upper surface of the second guide form the arc groove.

[0016] In some embodiments, the second rotor has a cylindrical shape, and while the first rotor moves along the cylindrical cam groove, the second rotor always rolls and contacts the arcuate groove.

[0017] In some embodiments, the first guide and the second guide are both arc-shaped members, and the arc-shaped member has an arc extension path with the axis of the pendulum shaft as a rotation center line.

[0018] In some embodiments, the first rotor and the second rotor are both cylindrical, the first rotor and the second rotor are rotatably attached to the swing end via a common rotating shaft, and the first rotor and the second rotor are distributed sequentially in the axial direction of the rotating shaft.

[0019] In some embodiments, there are two second rotors distributed at a distance in the axial direction of the rotating shaft, and as the first rotor moves along the cylindrical cam groove, one of the second rotors contacts the first guide and the other second rotor contacts the second guide.

[0020] In some embodiments, the first rotor and / or the second rotor are rolling bearings.

[0021] In some embodiments, one of the lower formwork and the frame is provided with a guide groove, and the other is provided with a guide column, each of the guide column and the guide groove extending in the vertical direction, and the guide column is fitted into the guide groove so as to be slidable in the vertical direction.

[0022] Another technical solution used in the present invention is as follows. A lower mold linkage mechanism for a bottle blowing machine, comprising: a frame; a pendulum shaft rotatably mounted on the frame about its own axis and for controlling opening and closing of a side mold; a lower mold mounted on the frame so as to be able to rise and fall; and a swing arm having one end connected to the pendulum shaft, wherein one of the other end of the swing arm and the lower mold is provided with a cylindrical cam, and the other is provided with a first rotor rotatably mounted about its own axis, the first rotor is rotatably mounted on a cam curve of the cylindrical cam, the cam curve is provided at an inclination up and down in the circumferential direction, and the radius of rotation of the other end of the swing arm is is greater than the distance between the lower formwork and the pendulum axis, and the lower form interlocking mechanism further comprises a first guide and a second guide arranged side by side at a distance in the vertical direction on the frame, and a second rotor arranged on the other end of the swing arm so as to be rotatable about its own axis, and when the swing arm rotates, the second rotor is always in contact between the first guide and the second guide, and the cylindrical cam or the first rotor is arranged on one side of the other end of the swing arm facing the lower formwork, and the second rotor is arranged on one side of the other end of the swing arm deviating from the lower formwork.

[0023] Preferably, the swing arm has a first position and a second position, and when the swing arm is in the first position, the two side formworks are in a mold closing position and the lower formwork is at its highest point, and when the swing arm is in the second position, the two side formworks are in a mold opening position and the lower formwork is at its lowest point.

[0024] Preferably, the axis of the cylindrical cam and the axis of the pendulum shaft overlap each other.

[0025] Preferably, the cylindrical cam is a partial cam provided on one side of the lower formwork that is away from the pendulum axis, and the circumferential arc of the partial cam is smaller than 360°.

[0026] More preferably, the first rotor and the second rotor are provided side by side on the same axis on different sides of the other end of the swing arm, and the axis of the first rotor is perpendicular to the axis of the pendulum shaft.

[0027] More preferably, the first rotor is provided at the other end of the swing arm, and a rotation radius of the first rotor is greater than a distance between the lower formwork and an axis of the pendulum shaft.

[0028] Preferably, the first guide and the second guide are each provided on one side of the lower formwork that is away from the pendulum axis.

[0029] Preferably, the first guide and the second guide are each an arc-shaped guide, an arc gap for accommodating the second rotor is formed between the first guide and the second guide, and an axis of the arc gap and an axis of the pendulum shaft overlap with each other.

[0030] Preferably, a lower surface of the first guide and an upper surface of the second guide are each perpendicular to an axis of the pendulum shaft.

[0031] Preferably, one of the frame and the lower formwork is provided with a guide groove parallel to the axis of the pendulum shaft, and the other is provided with a guide column parallel to the axis of the pendulum shaft, the guide column being mounted in the guide groove so as to be able to rise and fall. Effect of the Invention

[0032] By applying the above technical solutions, the present invention has the following advantages over the prior art: In the lower mold interlocking mechanism of the bottle blowing machine of the present invention, the first rotor is installed between the swing end of the swing arm and the lower mold, and the cylindrical cam with a cylindrical cam groove is installed, the first rotor is fitted into the cylindrical cam groove, the swing arm and the lower mold form a cylindrical cam pair, the rotation of the pendulum axis is directly converted into the lifting and lowering motion of the lower mold, and no moving parts are added, so the overall interlocking mechanism has fewer parts, the structure is simple, and the operation is reliable. [Brief description of the drawings]

[0033] [Figure 1] FIG. 2 is a schematic plan view of the overall configuration of the lower formwork interlocking mechanism and the side formwork interlocking mechanism according to the first embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic perspective view of a lower die interlocking mechanism according to the first embodiment of the present invention. [Diagram 3] 3 is a schematic perspective view of the lower die interlocking mechanism of FIG. 2 with a first guide and a second guide removed (where the swing arm is in a first position). FIG. [Figure 4] 4 is a perspective schematic diagram of the lower die interlocking mechanism of FIG. 3 (where the swing arm is in a position between a first position and a second position). FIG. [Diagram 5] 4 is a perspective view showing the configuration of the lower die interlocking mechanism of FIG. 3 (where the swing arm is in a second position). FIG. [Figure 6] 4 is a schematic perspective view of the lower die interlocking mechanism of FIG. 3 with a swing arm, a first rotor, and a second rotor removed. FIG. [Figure 7] 3 is a schematic diagram of a mounting configuration of a first guide and a second guide on a frame in the lower die interlocking mechanism of FIG. 2. [Figure 8] 3 is a schematic diagram showing the configuration of a swing arm, a first rotor, and a second rotor in the lower die interlocking mechanism of FIG. 2. [Figure 9] 3 is a schematic diagram of a connection configuration between a lower mold frame and a cylindrical cam in the lower mold interlocking mechanism of FIG. 2. [Figure 10] 3 is a perspective view showing a schematic configuration of a second guide in the lower die interlocking mechanism of FIG. 2. [Figure 11] FIG. 3 is a schematic front view of the lower die interlocking mechanism of FIG. 2. [Figure 12] FIG. 12 is a schematic diagram showing the structure of FIG. 11 from which the first guide and the second guide have been removed. [Figure 13] 13 is a schematic cross-sectional view taken along the line AA in FIG. 12. [Figure 14] 13 is a schematic cross-sectional view of a lower die interlocking mechanism according to the second embodiment, taken along the line AA in FIG. 12. FIG. [Figure 15]FIG. 11 is a schematic diagram showing the overall configuration of a lower die interlocking mechanism according to a third embodiment. [Figure 16] FIG. 16 is a schematic diagram showing the structure of FIG. 15 with the first guide removed. [Figure 17] 16 is a schematic diagram of a mounting configuration of a first guide and a second guide on a frame in the lower die interlocking mechanism of FIG. 15. [Figure 18] 16 is a schematic diagram showing the configuration of a swing arm, a first rotor, and a second rotor in the lower die interlocking mechanism of FIG. 15. [Figure 19] 16 is a schematic diagram of a connection configuration between a lower mold frame and a cylindrical cam in the lower mold interlocking mechanism of FIG. 15. [Figure 20] 16 is a schematic plan view of the lower die interlocking mechanism of FIG. 15. [Figure 21] 16 is a schematic diagram of the load of the first rotor and the second rotor on the swing arm in the lower die interlocking mechanism of FIG. 15. [Figure 22] FIG. 13 is a schematic diagram of the front configuration of the lower die interlocking mechanism of the fourth embodiment with the first guide and the second guide removed. [Figure 23] 23 is a schematic diagram of the load of the first rotor and the second rotor on the swing arm in the lower die interlocking mechanism of FIG. 22. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] The technical solutions of the present invention are further described below with reference to specific embodiments and drawings.

[0035] The following is a brief description of merely some exemplary embodiments. As will be appreciated by those skilled in the art, the described embodiments can be modified in a variety of different ways without departing from the spirit or scope of the embodiments of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

[0036] In describing the embodiments of the present invention, it should be understood that the orientations or positional relationships indicated as "length," "in," etc. are based on those shown in the accompanying drawings, and are merely intended to facilitate and simplify the description of the embodiments of the present invention, and do not indicate or suggest that the designated devices or elements have a particular orientation or must be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present invention.

[0037] Moreover, the terms "first" and "second" are used merely for descriptive purposes and cannot be understood to indicate or imply the relative importance or number of the indicated technical features. Thus, the feature delimited by "first" and "second" may expressly or imply that it includes one or more of the said features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically limited.

[0038] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "attached", "connected", "connected", "fixed" and the like should be broadly understood, and unless otherwise clearly limited, for example, they may be fixedly connected, detachably connected, or integral, may be mechanically connected, may be electrically connected, may be directly connected, may be indirectly connected via an intermediate medium, may be communication inside two elements, or may be an interaction relationship between two elements. Those skilled in the art may understand the specific meaning of the above terms in the embodiments of the present invention according to the specific situation.

[0039] In embodiments of the present invention, unless expressly stated and limited otherwise, a first feature being "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features through other features between them, but not directly between them. And a first feature being "above," "upper," and "on the upper surface" of a second feature may include the first feature being directly above or diagonally above the second feature, or may only indicate that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "lower," and "on the lower surface" of a second feature may include the first feature being directly below or diagonally below the second feature, or may only indicate that the horizontal height of the first feature is lower than that of the second feature.

[0040] The following disclosure provides and implements various embodiments or examples to realize different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the following describes the components and installations of specific examples. Of course, the following is merely an example and is not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference characters in different examples, and such repetition is for the purpose of brevity and clarity, and does not in itself indicate a relationship between the various embodiments and / or installations discussed.

[0041] Example 1 Referring to the lower mold interlocking mechanism of the bottle blowing machine shown in Figures 2 to 5, it includes a frame 1, a pendulum shaft 2 extending in the vertical direction and rotatably attached to the frame 1 around its own axis, a lower formwork 3 attached to the frame 1 so as to be movable up and down in the vertical direction, and a swing arm 4 fixedly connected to the pendulum shaft 2 and capable of swinging around the axis of the pendulum shaft 2 as the pendulum shaft 2 rotates.

[0042] The lower die interlocking mechanism further comprises a first rotor 6 and a cylindrical cam 5 provided with a cylindrical cam groove 51, the axis of which is colinear with the axis of the pendulum shaft 2, the cylindrical cam groove 51 being provided on the outer periphery of the cylindrical cam 5 and inclined upwards and downwards in the circumferential direction, the extended trajectory curve of the cylindrical cam groove 51 being projected onto a plane perpendicular to the axis of the pendulum shaft 2 as an arc, and the arc has the axis of the pendulum shaft 2 as its rotation center line.

[0043] The first rotor 6 is mounted in the cylindrical cam groove 51 so as to be relatively movable in the extension direction of the cylindrical cam groove 51, the swing arm 4 has a swing end 41, one of the first rotor 6 and the cylindrical cam 5 is mounted at the swing end 41 and the other is mounted on the lower formwork 3, and the swing arm 4 swings about the axis of the pendulum shaft 2 to move the first rotor 6 along the cylindrical cam groove 51, thereby vertically raising and lowering the lower formwork 3 in conjunction with the first rotor 6. In this way, without adding any moving members, the rotation of the pendulum shaft 2 is directly converted into the vertical movement of the lower formwork 3, resulting in fewer members, a simple structure and reliable operation.

[0044] In this embodiment, the first rotor 6 is cylindrical, the axis of the first rotor 6 is perpendicular to the axis of the pendulum shaft 2, and the first rotor 6 is rotatably provided around its own axis in the cylindrical cam groove 51. Here, the first rotor 6 is rotatably provided at the swing end 41 of the swing arm 4 via the rotating shaft 10, and the cylindrical cam 5 is fixedly provided to the lower formwork 3. During the process of the swing arm 4 swinging around the axis of the pendulum shaft 2, the first rotor 6 and the groove wall of the cylindrical cam groove 51 are engaged with each other by rolling.

[0045] In another embodiment, a cylindrical cam 5 having a cylindrical cam groove 51 may be fixedly mounted to the swing end 41, and a first rotor 6 may be mounted on the lower formwork 3, and the swing of the swing arm 4 may drive the first rotor 6 to move in the cylindrical cam groove 51, thereby driving the lower formwork 3 to rise and fall in the vertical direction.

[0046] In this embodiment, as shown in Figures 2 to 6 and 9, the cylindrical cam 5 is a partial cam with a circumferential arc smaller than 360°, and only the part where the cylindrical cam groove 51 is provided is held to avoid interference with members such as the frame 1 and the lower formwork 3. The cylindrical cam groove 51 has a first end 5A and a second end 5B provided at opposite ends in the extending direction, and the cylindrical cam groove 51 extends upward in a spiral shape from the first end 5A to the second end 5B. In the process of the swing arm 4 swinging around the axis of the pendulum shaft 2, there are a first position and a second position. When the swing arm 4 is in the first position, as shown in Figures 2 and 3, the first rotor 6 is at the first end 5A, and when the swing arm 4 is in the second position, as shown in Figure 5, the first rotor 6 is at the second end 5B. In other words, as the swing arm 4 swings around the axis of the pendulum shaft 2 to switch from the first position to the second position, the first rotor 6 moves from the first end 5A to the second end 5B in the cylindrical cam groove 5, causing the lower formwork 3 to lower and become shorter in height.

[0047] 2 to 10, a guide structure is provided between the lower formwork 3 and the frame 1 to stably guide the lower formwork 3 as it moves up and down in the vertical direction, and in this embodiment, the guide structure includes a guide groove 11 and a guide column 31 extending in the vertical direction, the extension directions of the guide groove 11 and the guide column 31 are both parallel to the axis of the pendulum shaft 2, the guide groove 11 is provided in the frame 1, and the guide column 31 is fixedly provided in the lower formwork 3, and the guide column 31 is slidably fitted and inserted into the guide groove 11. Of course, in other embodiments, the guide groove 11 may be provided in the lower formwork 3, and the guide column 31 may be provided in the frame 1.

[0048] 2 to 6, the lower form 3 has a first side facing the pendulum axis 2 and a second side deviating from the pendulum axis 2. In this embodiment, as shown in Fig. 8, the swing arm 4 is configured by connecting multiple straight arms in sequence, and an angle is formed between two adjacent straight arms, so that one end of the swing arm 4 is fixedly connected to the pendulum axis 2 on the first side, a swing end 41 of the swing arm 4 is provided on the second side, and a cylindrical cam groove 51 is provided on the second side and is fitted into the first rotor 6 provided on the swing end 41. In this way, the rotation radius of the first rotor 6, i.e., the distance between the first rotor 6 and the axis of the pendulum shaft 2, is greater than the distance between the mold core of the lower mold form 3 and the axis of the pendulum shaft 2, so that when rotating by the same rotation angle, the arc path of the first rotor 6 is longer, and the curvature of the extended orbit curve of the cylindrical cam groove 51 is sufficiently large, which avoids the occurrence of distortion phenomenon in the extended orbit curve of the cylindrical cam groove 51 and ensures stable fitting with the first rotor 6, so that the design of the cylindrical cam 5 is simpler and easier to implement; at the same time, the curvature of the extended orbit curve of the cylindrical cam groove 51 is large, so that the diameter size of the first rotor 6 can be designed to be large, and the service life of the cylindrical cam pair consisting of the cylindrical cam 5 and the first rotor 6 is prolonged.

[0049] 2 to 10, the lower die interlocking mechanism of this embodiment further includes a guide sheet fixedly provided on the frame 1 and a second rotor 9 provided on the swing end 41 of the swing arm 4, the guide sheet is provided with an arc groove, the arc extension orbit of the arc groove has the axis of the pendulum shaft 2 as the rotation center line, the second rotor 9 is provided in the arc groove so as to be relatively movable in the extension direction of the arc groove, and the second rotor 9 is supported in the vertical direction by the lower groove wall of the arc groove. In this embodiment, the guide sheet includes a first guide 7 and a second guide 8 fixedly provided on the frame 1, the first guide 7 and the second guide 8 are provided with a gap between them in the vertical direction, the first guide 7 is located above the second guide 8, and a part of the swing arm 4 is deeply inserted between the first guide 7 and the second guide 8. The lower surface 71 of the first guide 7 and the upper surface of the second guide 8 are both perpendicular to the axis of the pendulum shaft 2, and the lower surface 71 of the first guide 7 and the upper surface of the second guide 8 form the above-mentioned arc groove.

[0050] Here, the first guide 7 and the second guide 8 are both arc-shaped members with the same shape and size, the arc extension orbit of the arc-shaped members has the axis of the pendulum shaft 2 as the rotation center line, and the distance between them is equal to the diameter of the second rotor 9. The second rotor 9 is cylindrical, and while the first rotor 6 moves along the cylindrical cam groove 51, the second rotor 9 always rolls and contacts the arc groove.

[0051] In this embodiment, the second rotor 9 is also cylindrical, and the second rotor 9 and the first rotor 6 are rotatably attached to the swing end 41 of the swing arm 4 via a common rotating shaft 10, and the first rotor 6 and the second rotor 9 are sequentially distributed in the axial direction of the rotating shaft 10. Here, the first rotor 6 and the second rotor 9 are respectively provided on different sides of the swing end 41 in the thickness direction thereof, that is, the first rotor 6 is located on one side of the swing end 41 facing the lower formwork 3, and the second rotor 9 is located on one side of the swing end 41 away from the lower formwork 3, which is very convenient to install. The first rotor 6 and the second rotor 9 use the same type of rolling bearing, which is maintenance-free, has a small number of parts, and ensures a long service life.

[0052] In this way, when the first rotor 6 mounted on the swing end 41 of the swing arm 4 is subjected to the vertical dynamic load of the lower formwork 3, the dynamic load is transmitted to the frame 1 via the coaxially mounted second rotor 9 and the first guide 7 and / or second guide 8 in contact with it, thereby reducing the load received by the first rotor 6, ensuring stable and reliable movement of the first rotor 6 in the cylindrical cam groove 51 and contributing to ensuring the reliability and stability of the lower formwork interlocking mechanism.

[0053] 1 shows a schematic diagram of the overall configuration of the lower mold interlocking mechanism and side mold interlocking mechanism 20 of the bottle blowing machine of this embodiment, the side mold interlocking mechanism 20 includes two sets of side molds 201 and an interlocking lever set connected between the pendulum shaft 2 and the two sets of side molds 201, the two sets of side molds 201 are provided above the lower mold 3. When the swing arm 4 is in the first position shown in FIG. 3, the lower mold 3 is at the highest point, the two side molds 201 are close to each other, and the bottle blowing machine is in a mold closed state, and when the swing arm 4 is in the second position, the lower mold 3 is at the lowest point, the two side molds 201 are open to each other, and the bottle blowing machine is in a mold open state.

[0054] When the lower mold interlocking mechanism of the bottle blowing machine of this embodiment is operating: in the case of mold opening, the pendulum shaft 2 rotates clockwise, driving the two side mold frames 201 to open opposite each other, and at the same time, the swing arm 4 drives the first rotor 6 to rotate clockwise, thereby driving the cylindrical cam 5 to descend in synchronization with the lower mold frame 3; in the case of mold closing, the pendulum shaft 2 rotates counterclockwise, driving the two side mold frames 201 to come closer to each other, and at the same time, the swing arm 4 drives the first rotor 6 to rotate counterclockwise, thereby driving the cylindrical cam 5 to rise in synchronization with the lower mold frame 3.

[0055] Example 2 Referring to the lower mold interlocking mechanism of the bottle blowing machine shown in Fig. 14, the main difference from the first embodiment is that in this embodiment, the cylindrical cam groove 51 is provided on the first side of the lower mold frame 3, and the swing arm 4 is provided on the first side as a whole. When the distance between the axis of the pendulum shaft 2 and the mold core of the lower mold frame 3 is sufficiently large, even if the cylindrical cam groove 51 is provided according to this method, the first rotor 6 can have a sufficiently large rotation radius, and the first rotor 6 can have a relatively long moving stroke in the cylindrical cam groove 51, so that the curvature of the extended orbit curve of the cylindrical cam groove 51 is sufficiently large, which avoids the occurrence of the distortion phenomenon in the cylindrical cam groove 51 and ensures stable fitting with the first rotor 6.

[0056] Example 3 Referring to the lower mold interlocking mechanism of the bottle blowing machine shown in Figures 15 to 21, the main differences from Example 1 are: (1) a mounting groove 42 is opened at the swing end 41, the mounting groove 42 is specifically a U-shaped groove, the second rotor 9 is rotatably mounted in the mounting groove 42 around the axis of the rotating shaft 10, and the rotating shaft 6 is specifically a screw with a bolt, so that the first rotor 6 and the second rotor 9 can be coaxially mounted on the swing end 41; (2) a buffer 52 is provided at both the first end 5A and / or the second end 5B of the cylindrical cam groove 51, the buffer 52 is specifically a cylindrical structure made of an elastic material, and when the first rotor 6 moves to the first end 5A and / or the second end 5B of the cylindrical cam groove 51, the impact and noise generated during the upstroke and / or downstroke of the lower mold 3 are reduced or eliminated.

[0057] As shown in Figures 15 to 21, in the lower mold interlocking mechanism of the bottle blowing machine of this embodiment, like the method of embodiment 1, the first rotor 6 is installed on the second side of the lower mold form 3, and the rotation radius of the first rotor 6 is greater than the distance L between the mold core A of the lower mold form 3 and the axis of the pendulum shaft 2. In the process of the swing arm 4 rotating together with the pendulum shaft 2, the contact area between the first rotor 6 and the cylindrical cam 5 is S, and the arc path is relatively long, which contributes to simplifying the design and implementation of the cylindrical cam 5.

[0058] 20 and 21, the vertical dynamic load acting on the first rotor 6 by the lower formwork 3 is Fv, and when the vertical dynamic load Fv is downward, the second rotor 9 and the lower second guide 8 are brought into contact and compressed, and the load is transmitted to the frame 1 via the second guide 8, and when the vertical dynamic load Fv is upward, the second rotor 9 and the upper first guide 7 are brought into contact and compressed, and the load is transmitted to the frame 1 via the first guide 7. In this way, the load and deformation due to the action of the vertical dynamic load Fv on the swing arm 4 can be clearly reduced.

[0059] When this technical solution is used, an unbalanced moment exists in the rotating shaft 10 on which the first rotor 6 and the second rotor 9 are mounted, and the action of the moment causes the rotating shaft 10 to bend, which may affect normal contact between the first rotor 6 and the cylindrical cam 5, and between the second rotor 9 and the first guide 7 and the second guide 8. Therefore, when such a technical solution is used, the swing arm 4 should have sufficient torsional rigidity.

[0060] Example 4 Referring to the lower die interlocking mechanism of the bottle blowing machine shown in Figures 22 and 23, the main difference from Example 3 is that in this example, there are two second rotors 9 spaced apart in the axial direction of the rotating shaft 10, and as the first rotor 6 moves along the cylindrical cam groove 51, one of the two second rotors 9 contacts the lower surface 71 of the first guide 7, and the other contacts the upper surface 81 of the second guide 8.

[0061] Specifically, a mounting groove 42 is also provided at the swing end 41 of the swing arm 4, one second rotor 9 is provided within the mounting groove 42 and the other second rotor 9 is provided outside the mounting groove 42, and the first rotor 6 and the two second rotors 9 are distributed sequentially in the axial direction of the rotating shaft 10.

[0062] As shown in Figure 23, the vertical dynamic load acting on the first rotor 6 by the lower formwork 3 is Fv. When the vertical dynamic load Fv is downward, the second rotor 9a and the second guide 8 are compressed in contact with each other, and due to the action of an upward vertical load Fva, the second rotor 9b and the second guide 7 are compressed in contact with each other, and due to the action of a downward vertical load Fvb, the three loads Fv, Fva and Fvb not only balance the forces in the vertical direction, but also balance the moments. When the vertical dynamic load Fv is upward, the second rotor 9a and the first guide 7 are compressed in contact with each other, and due to the action of the downward vertical load Fva, the second rotor 9b and the second guide 7 are compressed in contact with each other, and due to the action of the upward vertical load Fvb, the three loads Fv, Fva and Fvb are similarly balanced in force and moment. In this way, not only can the load and deformation caused by the vertical dynamic load Fv of the swing arm 4 be obviously reduced, but also the deflection of the rotating shaft 10 on which the first rotor 6 and the second rotor 9 are mounted can be avoided, and normal contact between the first rotor 6 and the cylindrical cam 5 can be ensured. Obviously, in order to ensure that the performance of the lower die interlocking mechanism is excellent, the technical solution of this embodiment should be used when the torsional rigidity of the swing end 41 of the swing arm 4 is low.

[0063] In summary, the lower die interlocking mechanism of the bottle blowing machine in each embodiment of the present invention has the following advantages:

[0064] (1) The swing arm 4 and the pendulum axis 2 are fixedly connected, and the cylindrical cam 5 between the swing arm 4 and the lower formwork 3 and the first rotor 6 form a cylindrical cam pair. This directly converts the rotation of the pendulum axis 2 into the up and down lifting motion of the lower formwork 3, and no additional moving parts are required. This reduces the number of parts in the overall interlocking mechanism, simplifies the structure, and makes operation more reliable.

[0065] (2) The cylindrical cam contour, in which the distance between the axis of the pendulum shaft 2 and the mold core of the lower mold 3 is large, the contact area between the cylindrical cam 5 and the first rotor 6 is long, and the pressure angle is small, can obtain a sufficiently large effective stroke of the lower mold 3, which improves the dynamic performance of the cylindrical cam pair consisting of the cylindrical cam 5 and the first rotor 6, increases the correspondence of the radius of the first rotor 6 with the contour of the cylindrical cam 5, and makes it easier to design the size of the first rotor 6 to be relatively large, thereby extending the service life of the cylindrical cam pair.

[0066] (3) By arranging the first guide 7, the second guide 8 and the second rotor 9 so that they are in contact with each other, the influence of the dynamic load on the swing arm 4 along the axial direction of the pendulum axis 2 of the lower formwork 3 can be reduced or eliminated, the load condition of the swing end 41 of the swing arm 4 and the pendulum axis 2 can be simplified, and the stress and deformation of the swing arm 4 and the pendulum axis 2 can be reduced. As a result, the structural size of the swing arm 4 can be reduced while the utilization performance of the lower formwork interlocking mechanism can be improved.

[0067] (4) When a casting or forging blank is used for the swing arm 4, only the shaft hole for mounting and connecting with the pendulum shaft 2 and the swing end 41 to which the first rotor 6 and the second rotor 9 are attached need to be machined, which reduces manufacturing costs and makes installation and maintenance more convenient.

[0068] The above examples are only intended to explain the technical ideas and features of the present invention, and the purpose thereof is to enable people familiar with the art to understand the contents of the present invention and to practice the same based on the same, and do not limit the scope of protection of the present invention. Any equivalent changes or modifications substantially made based on the present invention shall be included in the scope of protection of the present invention. [Explanation of symbols]

[0069] 1 frame, 2 pendulum axis, 3 lower formwork, 4 swing arm, 5 cylindrical cam, 6 first rotor, 7 first guide, 8 second guide, 9 second rotor, 10 rotating shaft, 11 guide groove, 20 side formwork interlocking mechanism, 31 guide column, 41 swing end, 42 mounting groove, 51 cylindrical cam groove, 52 buffer, 201 side formwork

Claims

1. A lower mold linkage mechanism for a bottle blowing machine, comprising: a frame; a pendulum shaft extending in a vertical direction and rotatably attached to the frame about its own axis; a lower mold frame that is liftably attached to the frame; and a swing arm that is fixedly connected to the pendulum shaft and can swing about the axis of the pendulum shaft as the pendulum shaft rotates, The lower die interlocking mechanism further includes a cylindrical cam having a cylindrical cam groove and a first rotor, a lower mold interlocking mechanism for a bottle blowing machine, characterized in that an axis of the cylindrical cam and an axis of the pendulum shaft extend colinearly, the first rotor is provided in the cylindrical cam groove so as to be movable relatively in the extending direction of the cylindrical cam groove, the swing arm has a swing end, one of the first rotor and the cylindrical cam is provided at the swing end and the other is provided on the lower formwork, the first rotor is cylindrical, and the axis of the first rotor and the axis of the pendulum shaft are perpendicular to each other.

2. 2. The lower die interlocking mechanism of a bottle blowing machine according to claim 1, wherein the first rotor is rotatably mounted in the cylindrical cam groove around its own axis.

3. The lower mold interlocking mechanism of a bottle blowing machine according to claim 2, characterized in that the first rotor is rotatably mounted on the swing end via a rotating shaft, and the cylindrical cam is fixedly mounted on the lower mold.

4. The lower die interlocking mechanism of a bottle blowing machine according to claim 1, characterized in that the cylindrical cam is a partial cam whose circumferential arc is less than 360°.

5. The lower mold linkage mechanism of the bottle blowing machine described in claim 1, characterized in that the lower mold form has a first side facing the pendulum axis and a second side deviated from the pendulum axis, the cylindrical cam groove is provided on the first side and the swing arm is located as a whole on the first side, or the cylindrical cam groove is provided on the second side and the swing end of the swing arm is located on the second side.

6. 2. The lower mold interlocking mechanism of the bottle blowing machine according to claim 1, wherein the cylindrical cam groove has a first end and a second end provided at opposite ends of the extending direction thereof, the cylindrical cam groove extends upward in a spiral shape from the first end to the second end, the swing arm has a first position and a second position, and in the process of the swing arm being transformed from the first position to the second position with the rotation of the pendulum shaft, the first rotor moves from the first end to the second end, and the height of the lower mold is reduced.

7. The lower die interlocking mechanism further includes the guide sheet fixedly provided to the frame and the second rotor provided at the swing end, The lower die interlocking mechanism of a bottle blowing machine according to any one of claims 1 to 6, characterized in that the guide sheet is provided with an arcuate groove, the arcuate extension orbit of the arcuate groove has the axis of the pendulum shaft as a rotation center line, the second rotor is provided in the arcuate groove so as to be relatively movable in the extension direction of the arcuate groove, and the second rotor is supported in the vertical direction by a lower groove wall of the arcuate groove.

8. The lower die interlocking mechanism of the bottle blowing machine according to claim 7, characterized in that the guide sheet comprises a first guide and a second guide, each of which is fixedly mounted on the frame, the first guide and the second guide are spaced apart in the vertical direction, the lower surface of the first guide and the upper surface of the second guide are both perpendicular to the axis of the pendulum shaft, and the space between the lower surface of the first guide and the upper surface of the second guide forms the arc groove.

9. The lower die interlocking mechanism of a bottle blowing machine according to claim 8, characterized in that the second rotor is cylindrical, and while the first rotor moves along the cylindrical cam groove, the second rotor always rolls and contacts the arc groove.

10. The lower die interlocking mechanism of the bottle blowing machine according to claim 8, characterized in that the first guide and the second guide are both arc-shaped members, and the arc extension orbit of the arc-shaped member has the axis of the pendulum shaft as the rotation center line.

11. The lower die interlocking mechanism of the bottle blowing machine according to claim 7, characterized in that the first rotor and the second rotor are both cylindrical, the first rotor and the second rotor are rotatably attached to the swing end via a common rotating shaft, and the first rotor and the second rotor are sequentially distributed in the axial direction of the rotating shaft.

12. The lower die interlocking mechanism of a bottle blowing machine according to claim 11, characterized in that there are two second rotors spaced apart in the axial direction of the rotating shaft, and as the first rotor moves along the cylindrical cam groove, one of the second rotors contacts the first guide and the other of the second rotors contacts the second guide.

13. The lower die interlocking mechanism of a bottle blowing machine according to claim 7, characterized in that the first rotor and / or the second rotor are rolling bearings.

14. The lower mold interlocking mechanism of the bottle blowing machine according to claim 1, characterized in that a guide groove is provided in one of the lower mold frame and the frame, and a guide column is provided in the other, the guide column and the guide groove each extend in the vertical direction, and the guide column is fitted into the guide groove so as to be slidable in the vertical direction.

15. A lower mold linkage mechanism for a bottle blowing machine comprising: a frame; a pendulum shaft rotatably mounted on the frame around its own axis and for controlling opening and closing of a side mold; a lower mold mounted on the frame so as to be able to rise and fall; and a swing arm having one end connected to the pendulum shaft, wherein one of the other ends of the swing arm and the lower mold is provided with a cylindrical cam, and the other end of the swing arm and the lower mold are provided with a first rotor rotatably mounted around its own axis, the first rotor is rotatably mounted on a cam curve of the cylindrical cam, and the cam curve is provided at an incline up and down in the circumferential direction, The rotation radius of the other end of the swing arm is greater than the distance between the lower formwork and the pendulum axis, the lower die interlocking mechanism further includes a first guide and a second guide arranged side by side at a distance in the vertical direction on the frame, and a second rotor arranged at the other end of the swing arm so as to be rotatable about its own axis, and when the swing arm rotates, the second rotor is always in contact between the first guide and the second guide, The cylindrical cam or the first rotor is provided on one side of the swing arm where the other end faces the lower form, and the second rotor is provided on one side of the swing arm where the other end deviates from the lower form.

16. the swing arm has a first position and a second position; When the swing arm is in the first position, the two side forms are in a closed position and the lower form is at its highest point; The lower mold interlocking mechanism of a bottle blowing machine as described in claim 15, characterized in that when the swing arm is in the second position, the two side mold frames are in a mold opening position and the lower mold frame is at its lowest point.

17. The lower die interlocking mechanism of a bottle blowing machine according to claim 15, wherein the axis of the cylindrical cam and the axis of the pendulum shaft overlap each other.

18. The lower mold linkage mechanism of the bottle blowing machine according to claim 15, characterized in that the cylindrical cam is a partial cam provided on one side of the lower mold form that is separated from the pendulum axis, and the circumferential arc of the partial cam is smaller than 360°.

19. The lower die interlocking mechanism of the bottle blowing machine according to claim 18, characterized in that the first rotor and the second rotor are arranged coaxially side by side on different sides of the other end of the swing arm, and the axis of the first rotor is perpendicular to the axis of the pendulum shaft.

20. The lower mold interlocking mechanism of the bottle blowing machine according to claim 18, characterized in that the first rotor is provided at the other end of the swing arm, and the rotation radius of the first rotor is greater than the distance between the lower mold and the axis of the pendulum shaft.

21. The lower mold linkage mechanism of a bottle blowing machine according to claim 15, wherein the first guide and the second guide are each provided on one side of the lower mold form that is away from the pendulum axis.

22. 16. The lower die interlocking mechanism of the bottle blowing machine according to claim 15, wherein the first guide and the second guide are arc-shaped guides, an arc gap is formed between the first guide and the second guide to accommodate the second rotor, and an axis of the arc gap and an axis of the pendulum shaft overlap each other.

23. The lower die interlocking mechanism of a bottle blowing machine according to claim 15, wherein the lower surface of the first guide and the upper surface of the second guide are perpendicular to the axis of the pendulum shaft.

24. The lower mold interlocking mechanism of the bottle blowing machine according to claim 15, characterized in that one of the frame and the lower mold frame is provided with a guide groove parallel to the axis of the pendulum shaft, and the other is provided with a guide column parallel to the axis of the pendulum shaft, the guide column being arranged to be able to rise and fall in the guide groove.

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