Lower die interlocking mechanism of bottle blow 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 particularly to the lower mold linkage mechanism of a bottle blowing machine.

Background Art

[0002] A bottle blowing machine is an important device for manufacturing various liquid packaging bottles. In the process of the conventional bottle blowing machine blowing off bolts, it mainly consists of links such as unlocking of two side molds, opening of two side molds, lowering of the lower mold, picking up of bolts, feeding of blanks, closing of two side molds, raising of the lower mold, locking of two side molds, bottle blowing, etc. The opening and closing of the two side molds are controlled by a mold opening and closing cam. As a specific implementation solution, when the bottle blowing mold unit passes while rotating the mold opening and closing cam, the mold opening and closing cam drives the mold opening and closing swing arm and the mold opening and closing pendulum shaft fixedly connected thereto to swing, and further drives the opening and closing of the two side molds by a mold driving mechanism. The lifting and lowering of the lower mold are controlled by a lower mold cam. Such a solution has high requirements for manufacturing, installation and commissioning, and it is difficult to meet the requirements of high-speed bottle blowing.

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

[0004] (1) One of the two side formworks is connected to the lower formwork using a space cylindrical cam pair. When the two side formworks swing opposite each other to open and close, the space cylindrical cam pair drives the lower formwork to move up and down, thereby achieving interlocking between the lower formwork and the side formwork. Such an interlocking mechanism is simple in structure and reliable in transmission, without increasing the number of additional moving parts. However, the distance of the cylindrical cam pair from the center of the lower formwork is usually far, resulting in poor load conditions, and one component 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 power performance.

[0005] (2) The lower formwork is connected to the mold opening / closing swing arm via a link mechanism or connecting rod cam combination mechanism, and the mold opening / closing cam drives the two side formworks to open and close opposite each other by the mold opening / closing swing arm, and at the same time drives the lower formwork to move up and down via the link mechanism or connecting rod cam combination mechanism described above, thereby achieving interlocking between the lower formwork and the side formwork. Such an interlocking mechanism requires the addition of two or more movable parts, resulting in a complex structure, movement, and load conditions, 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 / closing pendulum shaft and the lower formwork are connected using a spatial cam pair. When the mold opening / closing pendulum shaft swings, the side formwork opens and closes, and the lower formwork moves up and down in sync, thereby achieving interlocking movement between the lower formwork and the side formwork. In this interlocking mechanism, the lower formwork is driven to move up and down by a swing arm on the mold opening / closing pendulum axis. Because the rotor rotation radius at the end of the swing arm is small, the arc path when the rotor rotates at the same rotation angle is short. Therefore, the spatial cam is difficult to design and realize. At the same time, because the curvature of the cam curve is small, the rotor size is relatively small to avoid distortion of the cam curve, and the load difficulty is large. Furthermore, a very large dynamic load is generated when the lower formwork moves up and down in the axial direction (i.e., vertical direction) of the mold opening / closing pendulum axis. This vertical dynamic load generates a large vertical bending moment in the swing arm. This vertical bending moment in the swing arm reduces the strength of the swing arm, causing vertical bending deformation of the swing arm, which affects normal contact between the cam rotor and the cam, and deteriorates the movement and power characteristics of the lower formwork. At the same time, the vertical bending moment in the swing arm is transmitted to the mold opening / closing pendulum axis, reducing the strength and rigidity of the mold opening / closing pendulum axis, and affecting its stability and service life. [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] The present invention aims to provide a lower die interlocking mechanism for a bottle blow machine in order to solve one or more problems of the prior art. [Means for solving the problem]

[0008] To achieve the above objectives, the technical solutions used in this invention are as follows. A lower mold interlocking mechanism for a bottle blow machine, comprising a frame, a pendulum shaft extending vertically and rotatably mounted on the frame about its own axis, a lower formwork mounted on the frame so as to be vertically movable, and a swing arm fixedly connected to the pendulum shaft and capable of swinging about the axis of the pendulum shaft in conjunction with the rotation 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, and the axis of the cylindrical cam and the axis of the pendulum shaft It extends along the same straight line. The first rotor is provided in the cylindrical cam groove so as to be movable relative to the direction of extension 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 at the lower formwork, the first rotor is cylindrical and the axis of the first rotor and the axis of the pendulum axis are perpendicular to each other.

[0009] In some embodiments, the first rotor is rotatably mounted in the cylindrical cam groove around 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 formwork.

[0011] In some embodiments, the cylindrical cam is a partial cam with a circumferential arc smaller than 360°.

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

[0013] In some embodiments, the cylindrical cam groove has a first end and a second end, which are provided at opposite ends in the direction of its extension, 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 being converted from the first position to the second position as the pendulum axis rotates, the first rotor moves from the first end to the second end, and the height of the lower formwork decreases.

[0014] In some embodiments, the lower interlocking mechanism further comprises a guide sheet fixedly provided on the frame and a second rotor provided at the swing end, wherein the guide sheet is provided with an arc groove, the arc extension trajectory of the arc groove has the axis of the pendulum shaft as the rotation centerline, the second rotor is provided so as to be movable relative to the extension direction of the arc groove in the arc groove, and the second rotor is supported vertically by the lower groove wall of the arc groove.

[0015] In some embodiments, the guide sheet comprises a first guide and a second guide fixedly provided on the frame, the first guide and the second guide being spaced apart in the vertical direction, the lower surface of the first guide and the upper surface of the second guide both being perpendicular to each other with respect 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 forming the arc groove.

[0016] In some embodiments, the second rotor is cylindrical, and as the first rotor moves along the cylindrical cam groove, the second rotor always rolls and contacts the arc groove.

[0017] In some embodiments, both the first guide and the second guide are arc-shaped members, and the arc extension trajectory of the arc-shaped member has the axis of the pendulum shaft as its rotational centerline.

[0018] In some embodiments, both the first rotor and the second rotor are cylindrical in shape, and the first rotor and the second rotor are rotatably mounted 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, the second rotors are distributed at intervals along 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.

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

[0021] In some embodiments, a guide groove is provided in one of the lower formwork and the frame, and a guide column is provided in the other, and both the guide column and the guide groove extend 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 this invention is as follows: A lower mold interlocking mechanism of a bottle blowing machine, comprising a frame, a pendulum shaft provided rotatably around its own axis on the frame and for controlling the opening and closing of a side mold, a lower mold provided liftably on the frame, and a swing arm having one end connected to the pendulum shaft. Of the other end of the swing arm and both sides of the lower mold, a cylindrical cam is provided on one side, and a first rotor is provided rotatably around its own axis on the other side. The first rotor is provided rotatably on the cam curve of the cylindrical cam. The cam curve is provided inclined up and down in the circumferential direction. The rotation radius of the other end of the swing arm is larger than the distance between the lower mold and the pendulum shaft. The lower mold interlocking mechanism further comprises a first guide and a second guide provided side by side at intervals in the vertical direction on the frame, and a second rotor provided rotatably around its own axis at the other end of the swing arm. When the swing arm rotates, the second rotor is always abutted between the first guide and the second guide. The cylindrical cam or the first rotor is provided on the side where the other end of the swing arm faces the lower mold, and the second rotor is provided on the side where the other end of the swing arm deviates from the lower mold.

[0023] Preferably, the swing arm has a first position and a second position. When the swing arm is in the first position, the two side molds are in the mold closed position, and the lower mold is at the highest point. When the swing arm is in the second position, the two side molds are in the mold open position, and the lower mold is at the 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 the side of the lower mold away from the pendulum shaft, and the circumferential arc of the partial cam is smaller than 360°.

[0026] More preferably, the first rotor and the second rotor are coaxially arranged 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 the radius of rotation of the first rotor is larger than the distance between the lower mold and the axis of the pendulum shaft.

[0028] Preferably, the first guide and the second guide are respectively provided on one side of the lower mold that deviates from the pendulum shaft.

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

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

[0031] Preferably, in one of the frame and the lower mold, a guide groove parallel to the axis of the pendulum shaft is provided, and in the other, a guide column parallel to the axis of the pendulum shaft is provided, and the guide column is provided in the guide groove so as to be able to move up and down.

Advantages of the Invention

[0032] By applying the above technical solution, the present invention has the following advantages compared with the prior art. In the lower mold interlocking mechanism of the bottle blowing machine of the present invention, a first rotor provided between the swinging end of the swing arm and the lower mold, and a cylindrical cam provided with a cylindrical cam groove, the first rotor is provided by being fitted into the cylindrical cam groove, the swing arm and the lower mold form a cylindrical cam pair, the rotation of the pendulum shaft is directly converted into the up and down movement of the lower mold, and no additional moving members are added. Therefore, the members of the overall interlocking mechanism are few, the structure is simple, and the operation is reliable. [Brief explanation of the drawing]

[0033] [Figure 1] This is a schematic plan view of the overall configuration of the lower mold interlocking mechanism and the side formwork interlocking mechanism of Embodiment 1 of the present invention. [Figure 2] This is a schematic diagram of the perspective configuration of the lower joint mechanism in Embodiment 1 of the present invention. [Figure 3] Figure 2 shows a schematic perspective view of the lower joint mechanism with the first and second guides removed (the swing arm is in the first position). [Figure 4] Figure 3 is a schematic perspective view of the lower type interlocking mechanism (where the swing arm is in a position between the first and second positions). [Figure 5] Figure 3 is a schematic perspective view of the lower interlocking mechanism (where the swing arm is in the second position). [Figure 6] This is a schematic perspective view of the lower-type interlocking mechanism shown in Figure 3, with the swing arm and the first and second rotors further removed. [Figure 7] Figure 2 shows a schematic diagram of the mounting configuration of the first and second guides on the frame in the lower interlocking mechanism. [Figure 8] Figure 2 shows a schematic diagram of the configuration of the swing arm, first rotor, and second rotor in the lower interlocking mechanism. [Figure 9] Figure 2 is a schematic diagram of the connection configuration between the lower mold frame and the cylindrical cam in the lower mold interlocking mechanism. [Figure 10] Figure 2 shows a schematic diagram of the perspective configuration of the second guide in the lower interlocking mechanism. [Figure 11] Figure 2 is a schematic front view of the lower interlocking mechanism. [Figure 12] This is a schematic diagram based on Figure 11, with the first and second guides removed. [Figure 13] This is a schematic diagram of the cross-sectional configuration as seen through the line AA in Figure 12. [Figure 14] This is a schematic cross-sectional view of the lower mold interlocking mechanism in Example 2, corresponding to the view taken by arrow AA in Figure 12. [Figure 15]This is a schematic diagram of the overall configuration of the lower-type interlocking mechanism in Example 3. [Figure 16] This is a schematic diagram based on Figure 15, with the first guide removed. [Figure 17] Figure 15 shows a schematic diagram of the mounting configuration of the first and second guides on the frame in the lower interlocking mechanism. [Figure 18] Figure 15 shows a schematic diagram of the configuration of the swing arm, first rotor, and second rotor in the lower interlocking mechanism. [Figure 19] Figure 15 is a schematic diagram of the connection configuration between the lower mold frame and the cylindrical cam in the lower mold interlocking mechanism. [Figure 20] Figure 15 is a schematic plan view of the lower interlocking mechanism. [Figure 21] Figure 15 shows a schematic diagram of the loads on the first and second rotors in the swing arm of the lower interlocking mechanism. [Figure 22] This is a schematic front view of the lower mold interlocking mechanism in Example 4, with the first and second guides removed. [Figure 23] Figure 22 shows a schematic diagram of the loads on the first and second rotors in the swing arm of the lower-type interlocking mechanism. [Modes for carrying out the invention]

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

[0035] The following briefly describes some exemplary embodiments. As those skilled in the art will understand, the embodiments described can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be considered illustrative and not restrictive in nature.

[0036] In describing embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by "length," "inside," etc., is an orientation or positional relationship based on those shown in the attached drawings, and is merely for the purpose of facilitating and simplifying the description of embodiments of the present invention. It does not indicate or suggest that the pointed-out device or element has a specific orientation or must be constructed and operated in a specific orientation, and therefore should not be understood as limiting embodiments of the present invention.

[0037] Furthermore, the terms “first” and “second” are used merely to describe the purpose and cannot be understood as indicating or implying relative importance or the number of designated technical features. Thus, “first” and “second” may explicitly or implicitly indicate that the designated feature includes one or more such features. In the description of embodiments of the present invention, “multiple” means two or more unless otherwise clearly specified.

[0038] In describing embodiments of the present invention, unless otherwise explicitly stated and limited, terms such as “attachment,” “connection,” “connection,” and “fixing” should be understood broadly, and unless otherwise explicitly stated, they may refer to, for example, fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, internal communication between two elements, or interaction relationships between two elements. Those skilled in the art may understand the specific meaning of the above terms in embodiments of the present invention depending on the specific circumstances.

[0039] In embodiments of the present invention, unless otherwise explicitly stated or limited, the presence of a first feature "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between them by other features rather than direct contact between them. The presence of a first feature "above," "above," and "on the top surface" of a second feature may include the first feature being directly above or diagonally above the second feature, or simply indicating that the horizontal height of the first feature is greater than that of the second feature. The presence of a first feature "below," "below," and "on the bottom surface" of a second feature may include the first feature being directly below or diagonally below the second feature, or simply indicating 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. To simplify the disclosure of embodiments of the present invention, the components and installations of specific examples are described below. Of course, the following are merely examples and are not intended to limit embodiments of the present invention. Also, embodiments of the present invention may repeat reference numbers and / or reference letters in different examples, and such repetitions are for the purpose of simplification and clarification and do not in themselves indicate relationships 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 comprises a frame 1, a pendulum shaft 2 extending in the vertical direction and rotatably mounted on the frame 1 around its own axis, a lower formwork 3 mounted on the frame 1 so as to be able to move 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 in conjunction with the rotation of the pendulum shaft 2.

[0042] The lower interlocking mechanism further comprises a first rotor 6 and a cylindrical cam 5 provided with a cylindrical cam groove 51, and the axis of the cylindrical cam 5 and the axis of the pendulum shaft 2 It extends along the same straight line.The cylindrical cam groove 51 is provided on the outer circumference of the cylindrical cam 5, inclined vertically in the circumferential direction. The extended trajectory curve of the cylindrical cam groove 51 is an arc when projected onto a plane perpendicular to the axis of the pendulum shaft 2, and this arc has the axis of the pendulum shaft 2 as its rotational centerline.

[0043] The first rotor 6 is mounted in the cylindrical cam groove 51 so as to be movable relative to the direction of extension of the cylindrical cam groove 51. The swing arm 4 has a swing end 41, with one of the first rotor 6 and the cylindrical cam 5 mounted on the swing end 41 and the other on the lower formwork 3. The swing arm 4 swings around the axis of the pendulum shaft 2, moving the first rotor 6 along the cylindrical cam groove 51, which in turn causes the lower formwork 3 to move up and down. In this way, the rotation of the pendulum shaft 2 is converted directly into the up and down movement of the lower formwork 3 without adding any moving members, resulting in fewer members, a simpler structure, and reliable operation.

[0044] In this embodiment, the first rotor 6 is cylindrical, its axis is perpendicular to the axis of the pendulum shaft 2, and the first rotor 6 is rotatably mounted in a cylindrical cam groove 51 so as to be rotatable around its own axis. Here, the first rotor 6 is rotatably mounted on the swing end 41 of the swing arm 4 via a pivot shaft 10, and the cylindrical cam 5 is fixedly mounted on the lower formwork 3. As the swing arm 4 swings around the axis of the pendulum shaft 2, the first rotor 6 and the groove wall of the cylindrical cam groove 51 are roll-fitted together.

[0045] In another embodiment, a cylindrical cam 5 provided with a cylindrical cam groove 51 may be fixedly mounted on the swing end 41, and a first rotor 6 may be mounted on the lower formwork 3. The swing of the swing arm 4 may drive the first rotor 6 to move the cylindrical cam groove 51, thereby driving the lower formwork 3 to move up and down.

[0046] In this embodiment, as shown in Figures 2 to 6 and Figure 9, the cylindrical cam 5 is a partial cam with a circumferential arc smaller than 360°, and only the portion of which the cylindrical cam groove 51 is provided is held, thus avoiding 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, which are provided at opposite ends in the direction of its extension, and the cylindrical cam groove 51 extends spirally upward 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, and as shown in Figures 2 and 3, when the swing arm 4 is in the first position, 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, in the process of the swing arm 4 swinging around the axis of the pendulum shaft 2 and switching from the first position to the second position, the first rotor 6 is at the cylindrical cam groove 51 As the lower formwork 3 moves from the first end 5A to the second end 5B, it lowers and its height decreases.

[0047] As shown in Figures 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. In this embodiment, the guide structure comprises a guide groove 11 and a guide column 31, both extending in the vertical direction. The extension directions of the guide groove 11 and the guide column 31 are parallel to each other with respect to the axis of the pendulum shaft 2. The guide groove 11 is provided on the frame 1, and the guide column 31 is fixedly provided on the lower formwork 3. 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 on the lower formwork 3 and the guide column 31 may be provided on the frame 1.

[0048] As shown in Figures 2 to 6, the lower formwork 3 has a first side facing the pendulum axis 2 and a second side that moves away from the pendulum axis 2. In this embodiment, as shown in Figure 8, the swing arm 4 is composed of a plurality of linear arms connected in sequence, with an angle between two adjacent linear arms. Thus, one end of the swing arm 4 is fixedly connected to the pendulum axis 2 on the first side, the swing end 41 of the swing arm 4 is provided on the second side, and the cylindrical cam groove 51 is provided on the second side and is fitted into the first rotor 6 provided on the swing end 41. Thus, the radius of rotation of the first rotor 6, that is, 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 3 and the axis of the pendulum shaft 2. As a result, when rotating by the same rotation angle, the arc path of the first rotor 6 is longer, the curvature of the extended trajectory curve of the cylindrical cam groove 51 is sufficiently large, preventing distortion from occurring in the extended trajectory curve of the cylindrical cam groove 51, and ensuring stable fitting with the first rotor 6. Therefore, the design of the cylindrical cam 5 becomes simpler and easier to implement. At the same time, the curvature of the extended trajectory curve of the cylindrical cam groove 51 is large, so the diameter size of the first rotor 6 can be designed to be larger, and the service life of the cylindrical cam pair consisting of the cylindrical cam 5 and the first rotor 6 is extended.

[0049] As shown in Figures 2 to 10, the lower-type interlocking mechanism of this embodiment further comprises a guide seat fixedly provided on the frame 1 and a second rotor 9 provided on the swing end 41 of the swing arm 4. The guide seat is provided with an arc groove, and the arc extension trajectory of the arc groove has the axis of the pendulum shaft 2 as the rotational centerline. The second rotor 9 is provided so as to be movable relative to the direction of extension of the arc groove in the arc groove, and the second rotor 9 is supported vertically by the lower groove wall of the arc groove. In this embodiment, the guide seat comprises 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 spaced apart 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 embedded 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 space between the lower surface 71 of the first guide 7 and the upper surface of the second guide 8 forms the aforementioned arc groove.

[0050] Here, both the first guide 7 and the second guide 8 are arc-shaped members, and their shape and size are the same. The arc extension trajectory of the arc-shaped member has the axis of the pendulum shaft 2 as its rotational centerline, and the distance between them is equal to the diameter of the second rotor 9. The second rotor 9 is cylindrical, and as 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 as well, the second rotor 9 is cylindrical, and the second rotor 9 and the first rotor 6 are rotatably mounted to the swing end 41 of the swing arm 4 via a common pivot shaft 10, with the first rotor 6 and the second rotor 9 distributed sequentially in the axial direction of the pivot shaft 10. Here, the first rotor 6 and the second rotor 9 are provided on opposite sides of the swing end 41 in the thickness direction, 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 the side of the swing end 41 moving away from the lower formwork 3, making mounting very convenient. The same type of rolling bearing is used for the first rotor 6 and the second rotor 9, resulting in maintenance-free operation, fewer parts, and a guaranteed service life.

[0052] Thus, 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, this 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 that contact it. As a result, the load on the first rotor 6 is reduced, ensuring stable and reliable movement of the first rotor 6 in the cylindrical cam groove 51, and contributing to the assurance of reliability and stability of the lower formwork interlocking mechanism.

[0053] Figure 1 shows a schematic diagram of the overall configuration of the lower mold interlocking mechanism and the side mold interlocking mechanism 20 of the bottle blowing machine in this embodiment. The side mold interlocking mechanism 20 comprises 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 Figure 3, the lower mold 3 is at its highest point, the two side molds 201 are facing each other and close together, and the bottle blowing machine is in the mold closed state. When the swing arm 4 is in the second position, the lower mold 3 is at its lowest point, the two side molds 201 are facing each other and open, and the bottle blowing machine is in the mold open state.

[0054] In this embodiment, when the lower mold interlocking mechanism of the bottle blowing machine is in operation: When the mold is open, the pendulum shaft 2 rotates clockwise, driving the two side mold frames 201 to open opposite each other. At the same time, the swing arm 4 is driven so that the first rotor 6 rotates clockwise, and thus the cylindrical cam 5 descends in sync with the lower mold frame 3. When the mold is closed, the pendulum shaft 2 rotates counterclockwise, driving the two side mold frames 201 to move closer together. At the same time, the swing arm 4 is driven so that the first rotor 6 rotates counterclockwise, and the cylindrical cam 5 rises in sync with the lower mold frame 3.

[0055] (Example 2) Referring to the lower mold interlocking mechanism of the bottle blow machine shown in Figure 14, the main difference from Embodiment 1 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 as a whole is provided on the first side. 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 is given a sufficiently large radius of rotation, and the first rotor 6 is given a relatively long movement stroke in the cylindrical cam groove 51, thereby making the curvature of the extended trajectory curve of the cylindrical cam groove 51 sufficiently large, thereby avoiding the occurrence of distortion in the cylindrical cam groove 51 and ensuring stable fitting with the first rotor 6.

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

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

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

[0059] When this technical solution is used, an unbalanced moment exists in the rotating shaft 10 to which the first rotor 6 and the second rotor 9 are mounted. Due to the action of this moment, the rotating shaft 10 will deflect, and this deflection of the rotating shaft 10 may affect the 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 using such a technical solution, the swing arm 4 should have sufficient torsional rigidity.

[0060] (Example 4) Referring to the lower die interlocking mechanism of the bottle blow machine shown in Figures 22 to 23, the main difference from Embodiment 3 is that in this embodiment, there are two second rotors 9 distributed at intervals 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 mounted inside the mounting groove 42, and the other second rotor 9 is mounted outside the mounting groove 42, with the first rotor 6 and the two second rotors 9 being distributed sequentially in the axial direction of the rotating shaft 10.

[0062] As shown in Figure 23, when the vertical dynamic load Fv acting on the first rotor 6 by the lower formwork 3 is downward, the second rotor 9a and the second guide 8 are in contact and compressed, and the action of the upward vertical load Fva causes the second rotor 9b and the second rotor to be compressed. 1 When the guide 7 is in contact and compressed, the three loads Fv, Fva, and Fvb not only balance in force in the vertical direction but also balance in moment, and when the vertical dynamic load Fv is upward, the second rotor 9a and the first guide 7 are in contact and compressed, and when the downward vertical load Fva acts, the second rotor 9b and the second guide 8 The three loads Fv, Fva, and Fvb are also balanced in terms of force and moment by the action of the upward vertical load Fvb. In this way, the load and deformation of the swing arm 4 under the action of the vertical dynamic load Fv can be clearly reduced, and deflection of the rotating shaft 10 to 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. Clearly, in order to ensure superior performance of the lower interlocking mechanism, 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 short, 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 shaft 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, thereby directly converting the rotation of the pendulum shaft 2 into the vertical movement of the lower formwork 3. This eliminates the need for additional moving members, resulting in fewer components in the overall interlocking mechanism, a simpler structure, and more reliable operation.

[0065] (2) A cylindrical cam profile with a large distance between the axis of the pendulum shaft 2 and the mold core of the lower mold 3, a long contact area between the cylindrical cam 5 and the first rotor 6, and a small pressure angle allows for a sufficiently large effective stroke of the lower mold 3, which enhances the power performance of the cylindrical cam pair consisting of the cylindrical cam 5 and the first rotor 6, increases the radius compatibility of the first rotor 6 with respect to the profile of the cylindrical cam 5, makes it easier to design the size of the first rotor 6 to be relatively large, and thus extends 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 in contact with each other, the influence of the swing arm 4 on the swing arm 4 due to the dynamic load along the axial direction of the pendulum shaft 2 of the lower formwork 3 can be reduced or eliminated, the load conditions on the swing end 41 of the swing arm 4 and the pendulum shaft 2 can be simplified, stress and deformation of the swing arm 4 and the pendulum shaft 2 can be reduced, the structural size of the swing arm 4 can be reduced, and the usability of the lower formwork interlocking mechanism can be improved.

[0067] (4) When a cast or forged blank is used for the swing arm 4, only the shaft hole for attaching and connecting to the pendulum shaft 2 and the swing end 41 to which the first rotor 6 and the second rotor 9 are attached require machining, resulting in lower manufacturing costs and easier installation and maintenance.

[0068] The above embodiments are solely for the purpose of illustrating the technical idea and features of the present invention, and their purpose is to enable those familiar with this art to understand the content of the present invention and to implement it accordingly, without limiting the scope of protection of the present invention. Any equivalent changes or modifications substantially made based on the present invention should be included within 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 interlocking mechanism for a bottle blow machine, comprising: a frame; a pendulum shaft extending vertically and rotatably mounted on the frame around its own axis; a lower formwork mounted on the frame so as to be vertically movable; and a swing arm fixedly connected to the pendulum shaft and capable of swinging around the axis of the pendulum shaft in conjunction with the rotation of the pendulum shaft, The lower interlocking mechanism further comprises a cylindrical cam with a cylindrical cam groove and a first rotor, The lower mold interlocking mechanism for a bottle blow machine is characterized in that the axis of the cylindrical cam and the axis of the pendulum shaft extend on the same straight line, the first rotor is provided so as to be movable relative to the direction of extension of the cylindrical cam groove in 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 at the lower mold, 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. The lower die interlocking mechanism for a bottle blow machine according to claim 1, characterized in that the first rotor is rotatably mounted in the cylindrical cam groove around its own axis.

3. The lower mold interlocking mechanism for 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 frame.

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

5. The lower mold interlocking mechanism for a bottle blow machine according to claim 1, characterized in that the lower mold has a first side facing the pendulum axis and a second side moving away from the pendulum axis, the cylindrical cam groove is provided on the first side and the swing arm as a whole is located 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. The lower mold interlocking mechanism for a bottle blow machine according to claim 1, characterized in that the cylindrical cam groove has a first end and a second end provided at opposite ends in the direction of its extension, 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 being converted from the first position to the second position as the pendulum axis rotates, the first rotor moves from the first end to the second end, and the height of the lower mold is reduced.

7. The lower-type interlocking mechanism further comprises a guide seat fixedly provided on the frame and a second rotor provided at the swing end. The lower die interlocking mechanism for a bottle blow machine according to any one of claims 1 to 6, characterized in that the guide sheet is provided with an arc groove, the arc extension trajectory of the arc groove has the axis of the pendulum shaft as the rotation centerline, the second rotor is provided in the arc groove so as to be movable relative to the direction of extension of the arc groove, and the second rotor is supported in the vertical direction by the lower groove wall of the arc groove.

8. The lower die interlocking mechanism for a bottle blowing machine according to claim 7, characterized in that the guide sheet comprises a first guide and a second guide fixedly provided 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 for a bottle blow machine according to claim 8, characterized in that the second rotor is cylindrical, and as the first rotor moves along the cylindrical cam groove, the second rotor is always in rolling contact with the arc groove.

10. The lower die interlocking mechanism for a bottle blow machine according to claim 8, characterized in that both the first guide and the second guide are arc-shaped members, and the arc extension trajectory of the arc-shaped member has the axis of the pendulum shaft as its rotational centerline.

11. The lower die interlocking mechanism for a bottle blowing machine according to claim 8, characterized in that both the first rotor and the second rotor are cylindrical in shape, 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.

12. The lower die interlocking mechanism for a bottle blow machine according to claim 11, characterized in that there are two second rotors distributed at intervals in the axial direction of the rotating shaft, and in the process of the first rotor moving along the cylindrical cam groove, one of the second rotors contacts the first guide and the other second rotor contacts the second guide.

13. The lower die interlocking mechanism for a bottle blow 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 for a bottle blowing machine according to claim 1, characterized in that a guide groove is provided in one of the lower formwork and the frame, 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 interlocking mechanism for a bottle blow machine, comprising a frame, a pendulum shaft rotatably mounted on the frame around its own axis and for controlling the opening and closing of a side formwork, a lower formwork mounted on the frame so as to be vertically movable, and a swing arm with one end connected to the pendulum shaft, wherein a cylindrical cam is provided on one of the other end of the swing arm and the lower formwork, and a first rotor rotatably mounted on the other end around its own axis, the first rotor rotatably mounted on the cam curve of the cylindrical cam, and the cam curve is inclined vertically in the circumferential direction, The rotational radius of the other end of the swing arm is greater than the distance between the lower formwork and the pendulum axis. The lower interlocking mechanism further comprises a first guide and a second guide arranged on the frame at a vertical distance apart, and a second rotor rotatably mounted on the other end of the swing arm around its own axis, wherein when the swing arm rotates, the second rotor is always in contact with the first guide and the second guide. The lower mold interlocking mechanism for a bottle blow machine is characterized in that the cylindrical cam or the first rotor is provided on one side of the swing arm facing the lower mold, and the second rotor is provided on one side of the swing arm moving away from the lower mold.

16. The swing arm has a first position and a second position, When the swing arm is in the first position, the two side formworks are in the closed position, and the lower formwork is at its highest point. The lower mold interlocking mechanism for a bottle blow machine according to claim 15, characterized in that when the swing arm is in the second position, the two side molds are in the mold open position and the lower mold is at its lowest point.

17. The lower die interlocking mechanism for a bottle blow machine according to claim 15, characterized in that the axis of the cylindrical cam and the axis of the pendulum shaft overlap each other.

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

19. The lower die interlocking mechanism for a bottle blow machine according to claim 18, characterized in that the first rotor and the second rotor are provided coaxially 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 for a bottle blow 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 formwork and the axis of the pendulum shaft.

21. The lower mold interlocking mechanism for a bottle blow machine according to claim 15, characterized in that the first guide and the second guide are each provided on one side of the lower formwork that is separated from the pendulum axis.

22. The lower die interlocking mechanism for a bottle blow machine according to claim 15, characterized in that the first guide and the second guide are each arc-shaped guides, an arc spacing for accommodating the second rotor is formed between the first guide and the second guide, and the axis of the arc spacing and the axis of the pendulum axis overlap each other.

23. The lower die interlocking mechanism for a bottle blow machine according to claim 15, characterized in that the lower surface of the first guide and the upper surface of the second guide are each perpendicular to the axis of the pendulum shaft.

24. The lower mold interlocking mechanism for a bottle blow machine according to claim 15, wherein 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, and the guide column is provided in the guide groove so as to be able to move up and down.

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