Pneumatic changeover switch and mold

Abstract

This invention provides a pneumatic switching switch and a mold. The switch includes a valve body and a valve core. The valve body has a first cavity with a top opening. The valve core is rotatably disposed in the first cavity, and the valve core and valve body are in axial upper limit engagement. An air source hole is provided on the bottom wall of the valve body. At least two groups of air holes are arranged sequentially along the circumference of the valve body at hole spacing. Each group of air holes includes a first air hole and a second air hole spaced apart. The valve core has a second cavity with a bottom opening, and the air source hole communicates with the second cavity. The circumference of the valve core includes a first valve position and a second valve position arranged along the circumference of the valve core. The first valve position and the second valve position are spaced apart at hole spacing. The first valve position corresponds to at least one group of air holes and includes a first hole and a first exhaust portion. The second valve position corresponds to at least one group of air holes and includes a second hole and a second exhaust portion. The switch of this invention has a compact structure, is easy to install, and has good versatility.

Description

Technical Field

[0001] This invention relates to the field of pneumatic control technology, and in particular to a pneumatic switching switch and mold. Background Technology

[0002] Currently, the sheet metal mold industry uses cylinders to drive mold changing, so as to achieve the goal of producing multiple models of products with one mold.

[0003] An existing mold changeover switch includes a valve body and a valve core. The valve body has a cavity with a top opening, and the valve core is rotatably sealed within the cavity. An air source hole communicating with the cavity is located at the center of the bottom of the valve body. Two or more groups of air holes are formed on the peripheral wall of the valve body. Each group of air holes includes two vent holes communicating with the cavity, with adjacent vent holes spaced at equal arc lengths. The valve core has a protrusion and a recess on the side near the bottom of the cavity. The recess allows the air source hole to communicate with any two or more, but less than half, adjacent vent holes, while the protrusion covers the remaining adjacent vent holes. The surface of the protrusion side has exhaust channels spaced at equal arc lengths, with the same number of vent holes covered by the protrusion. These exhaust channels extend along the outer peripheral wall of the valve core to the top opening of the valve body, with each exhaust channel corresponding to one vent hole. However, when multiple cylinders are connected to the ring switch via air pipes, the equal spacing of the air holes on the valve body leads to intersections between the multiple air pipes, potentially causing wiring errors. Furthermore, when this solution controls the operation of more than three cylinders at the same time, it cannot fully realize the switching between all different combination states of multiple cylinders. For example, when controlling three cylinders to work, the three cylinders of this solution can only achieve a maximum of six different working states to switch between, but in reality, the three cylinders can achieve eight different working states to switch between. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the first objective of the present invention is to provide a pneumatic switching switch that is compact in structure, easy to install, and capable of realizing all different working states.

[0005] A second objective of the present invention is to provide a mold comprising the above-described pneumatic switching switch.

[0006] To achieve the aforementioned first objective, the pneumatic switching device provided by the present invention includes a valve body and a valve core. The valve body has a first cavity with a top opening. The valve core is rotatably disposed in the first cavity, and the valve core and the valve body are in upper limit engagement in the axial direction of the valve core. An air source hole is provided on the bottom wall of the valve body. At least two groups of air holes are arranged sequentially along the circumference of the valve body at hole spacing. Each group of air holes includes a first air hole and a second air hole arranged at intervals. The valve core has a second cavity with a bottom opening, and the air source hole communicates with the second cavity. The circumference of the valve core includes a first valve position and a second valve position arranged along the circumference of the valve core. The first valve position corresponds to at least one group of vents. The first valve position includes a first orifice and a first exhaust portion. When the first vent of one group of vents is connected to the second cavity through the first orifice, the second vent of the same group is connected to the outside through the first exhaust portion. The second valve position corresponds to at least one group of vents. The second valve position includes a second orifice and a second exhaust portion. When the first vent of one group of vents is connected to the outside through the second exhaust portion, the second vent of the same group is connected to the second cavity through the second orifice. The first orifice and the second exhaust portion are arranged sequentially along the circumference of the valve core according to the orifice spacing.

[0007] As can be seen from the above, the present invention features at least two sets of air holes arranged sequentially along the circumference of the valve body at varying hole spacings. Each air hole set includes a first air hole and a second air hole spaced apart, greatly facilitating the connection of the cylinder to the changeover switch via air pipes. Furthermore, the air pipes do not intersect, reducing the likelihood of errors. A first valve position and a second valve position are provided on the peripheral wall of the valve core, enabling the control of multiple cylinders to operate in various types and quantities of different states, thus enhancing the versatility of the invention.

[0008] A further option is that one of the first valve positions corresponds to all the vent groups; and / or one of the second valve positions corresponds to all the vent groups.

[0009] A further embodiment is that the first hole portion includes at least one first through hole, and when the number of first through holes is two or more, the multiple first through holes are arranged sequentially along the circumference of the valve core according to the hole spacing; the second hole portion includes at least one second through hole, and when the number of second through holes is two or more, the multiple second through holes are arranged sequentially along the circumference of the valve core according to the hole spacing.

[0010] A further embodiment is that the first exhaust section includes at least one first exhaust channel. When there are two or more first exhaust channels, the multiple first exhaust channels are arranged sequentially along the circumference of the valve core according to the hole spacing, and the number of first exhaust channels is greater than or equal to the first through hole; the second exhaust section includes at least one second exhaust channel. When there are two or more second exhaust channels, the multiple second exhaust channels are arranged sequentially along the circumference of the valve core according to the hole spacing, and the number of second exhaust channels is greater than or equal to the second through hole.

[0011] As can be seen from the above, the drilling method used in this solution can effectively ensure the structural stability of the valve body.

[0012] A further option is that at least one second exhaust passage extends along the outer peripheral wall of the valve core to the opening at the top of the valve body, and the second exhaust passages are interconnected; or, each second exhaust passage extends along the outer peripheral wall of the valve core to the opening at the top of the valve body.

[0013] A further embodiment is that at least one first exhaust passage is connected to a second exhaust passage, and the first exhaust passages are interconnected; or, one first exhaust passage is connected to one second exhaust passage; or, each first exhaust passage extends along the outer peripheral wall of the valve core to the top opening of the valve body; or, at least one first exhaust passage extends along the outer peripheral wall of the valve core to the top opening of the valve body, and the first exhaust passages are interconnected.

[0014] As can be seen from the above, a first exhaust passage and a second exhaust passage are connected in a corresponding manner, which can effectively reduce the number of slots on the valve body and at the same time drive the cylinder to move quickly.

[0015] A further option is to have three vent groups, four first through holes, and six second through holes, arranged in the order of two second through holes, three first through holes, one second through hole, one first through hole, and three second through holes; or, five first through holes and five second through holes; or, six first through holes and four second through holes.

[0016] As can be seen from the above, the pneumatic switching switch of this solution can control three cylinders to switch between eight different working states.

[0017] A further option is to arrange the first and second vents at an axial interval.

[0018] As can be seen from the above, the first and second air holes are arranged axially at intervals, which makes the layout of the valve body and valve core more compact, greatly reducing the volume of the valve core and thus reducing the volume of the switching device.

[0019] A further option is that at least one of the first valve position and the second valve position is more than two, and the first valve position and the second valve position are arranged alternately along the circumference of the valve core.

[0020] As can be seen from the above, the pneumatic switching switch of this solution can fully control the cylinder to complete the switching between all different working states, greatly improving the versatility of the present invention.

[0021] To achieve the second objective mentioned above, the mold provided by the present invention includes a cylinder and a pneumatic changeover switch as described above. The number of cylinders is two or more, and each cylinder is connected to a corresponding air hole group. The air inlet of the cylinder is connected to the first air hole, and the air outlet of the cylinder is connected to the corresponding second air hole.

[0022] In summary, the pneumatic switching switch provided by this invention has a compact structure, small size, and is easy to install. It can also switch between all different working states of multiple cylinders and has good versatility. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first embodiment of the pneumatic switching switch of the present invention combined with a cylinder.

[0024] Figure 2 This is an exploded view of the first embodiment of the pneumatic switching switch of the present invention.

[0025] Figure 3 This is an exploded view of the first embodiment of the valve body of the present invention.

[0026] Figure 4 This is a cross-sectional view of the first embodiment of the pneumatic switching switch of the present invention.

[0027] Figure 5 This is a structural diagram of the first embodiment of the valve core of the present invention.

[0028] Figure 6 This is a top view of the first embodiment of the valve core of the present invention. Detailed Implementation

[0029] First embodiment of pneumatic switching

[0030] See Figures 1 to 6 The pneumatic switching switch 1 provided in this embodiment is connected to three cylinders 7. The pneumatic switching switch 1 includes a valve body 6 and a valve core 2. The valve body 6 has a first cavity with a top opening. The valve core 2 is rotatably and sealed in the first cavity. The valve body 6 includes a base 4 and a valve cover 5. The first cavity includes a cavity 40 with a top opening located in the base 4 and a hollow hole 53 located on the valve cover 5. The valve cover 5 covers the top opening of the base 4 and is detachably connected to the base 4 by screws or other fasteners. The valve core 2 includes a first core 23 and a second core 24 connected sequentially along the axial direction of the valve core 2. The first core 23 passes through the hollow hole 53, and the second core 24 is located in the cavity 40. The valve cover 5 abuts against the upper wall of the second core 24, so that the valve core 2 is limited in the axial direction of the valve core 2.

[0031] A gas source hole 41 is provided on the bottom wall of the base 4. Three gas hole groups 42 are arranged sequentially along the circumference of the valve body 6 on the peripheral wall of the base 4 according to the hole spacing. The spacing between two adjacent gas hole groups 42 is the same, and this same spacing is called the hole spacing. Each cylinder 7 is connected to a corresponding gas hole group 42. Each gas hole group 42 includes a first gas hole 420 and a second gas hole 421 arranged axially at intervals. The first gas hole 420 is connected to the air inlet of a cylinder 7, and the second gas hole 421 is connected to the exhaust port of the cylinder 7. A second cavity 20 with a bottom opening is provided in the valve core 2. The gas source hole 41 communicates with the second cavity 20. The peripheral wall of the second cavity 20 includes two first valve positions 22 and three second valve positions 21 arranged sequentially along the circumference of the valve core 2. The first valve positions 22 and the second valve positions 21 are spaced apart according to the hole spacing.

[0032] Each first valve position 22 corresponds to at least one vent group 42, and one first valve position 22 is capable of accommodating all vent groups 42. Each first valve position 22 includes a first hole portion and a first exhaust portion arranged axially at intervals. The first hole portion includes at least one first through hole 220 arranged sequentially along the circumference of the valve core 2 according to the hole spacing. The first exhaust portion includes at least one first exhaust passage 221 arranged sequentially according to the hole spacing. The first exhaust passage 221 extends axially, and the number of first exhaust passages 221 is greater than or equal to the number of first through holes 220. When each vent group 42 is connected to the first valve position 22, the first vent 420 is connected to the second cavity 20 through the first through hole 220, and the second vent 421 is connected to the outside through the first exhaust passage 221.

[0033] Each second valve position 21 corresponds to at least one group of air holes 42. One second valve position 21 can accommodate all groups of air holes 42. The second valve position 21 includes second holes and second exhaust portions arranged axially at intervals. The second holes include at least one second through hole 211 arranged sequentially along the axial direction of the valve core 2 according to the hole spacing. The second exhaust portions include at least one second exhaust channel 210 arranged sequentially according to the hole spacing. The second exhaust channels 210 extend axially, and the number of second exhaust channels 210 is greater than or equal to the number of second through holes 211. When each group of air holes 42 is connected to the second valve position 21, the first air hole 420 is connected to the outside through the second exhaust channel 210, and the second air hole 421 is connected to the second cavity 20 through the second through hole 211. The first holes and second exhaust portions are arranged sequentially along the circumference of the valve core 2 according to the hole spacing.

[0034] See Figure 6In this embodiment, there are four first through holes 220 and four first exhaust channels 221, six second through holes 211, and seven second exhaust channels 210. Axially, the second exhaust channels 210 and the first through holes 220 are located on the same side and close to the valve cover 5, while the first exhaust channels 221 and the second through holes 211 are located on the same side and away from the valve cover 5. Each second exhaust channel 210 extends along the outer peripheral wall of the valve core 2 to the top opening of the valve body 6, and each first exhaust channel 221 extends along the outer peripheral wall of the valve core 2 to the top opening of the valve body 6. Each first exhaust channel 221 is interconnected by a third exhaust channel 222, which extends circumferentially along the outer peripheral wall of the valve core 2. The first valve position 22 and the second valve position 21 are arranged alternately along the circumference of the valve core 2, in the order of second valve position 21, first valve position 22, second valve position 21, first valve position 22, and second valve position 21.

[0035] A second valve position 21 includes two second through holes 211 and two second exhaust passages 210; a second valve position 21 includes three second through holes 211 and three second exhaust passages 210; a second valve position 21 includes one second through hole 211 and one second exhaust passage 210.

[0036] A first valve position 22 includes three first through holes 220 and three first exhaust passages 221.

[0037] Specifically, the arrangement follows the sequence: second exhaust passage 210 - second through hole 211, second exhaust passage 210 - second through hole 211, first through hole 220 - first exhaust passage 221, first through hole 220 - first exhaust passage 221, first through hole 220 - first exhaust passage 221, second exhaust passage 210 - second through hole 211, first through hole 220 - first exhaust passage 221, second exhaust passage 210 - second through hole 211, second exhaust passage 210 - second through hole 211, second exhaust passage 210 - second through hole 211. Optionally, the number of cylinders 7 can be more than one, and the number of port groups 42 is greater than or equal to the number of cylinders 7.

[0038] Thus, the three cylinders 7 in this embodiment can achieve eight different combination states, such as extension-extension-retraction, extension-retraction-retraction, retraction-retraction-retraction, retraction-retraction-extension, retraction-extension-retraction, extension-retraction-extension, retraction-retraction-extension, retraction-extension-extension, and extension-extension-extension.

[0039] See Figure 3 and Figure 4A handle 5 is detachably provided on the upper wall of the valve core 2. The handle 5 is adjacent to the upper wall of the valve cover 5. A spring pin 50 is provided on the side of the handle 5 near the valve cover 5. Multiple gear slots 51 are arranged sequentially along the circumference of the valve body 6 according to the hole spacing on the upper wall of the valve cover 5. The spring pin 50 is positioned and engaged with the gear slots 51. Gear markings 52 are provided on the upper wall of the valve body 6 in the same number and corresponding positions as the gear slots 51.

[0040] Second embodiment of pneumatic switching

[0041] The difference between this embodiment and the first embodiment is that this embodiment includes three first valve positions and two second valve positions. The three first valve positions and two second valve positions are arranged in the order of first valve position, second valve position, first valve position, second valve position, and first valve position again.

[0042] Specifically, they are arranged in the following order: first through hole - first exhaust channel, first through hole - first exhaust channel, first through hole - first exhaust channel, second exhaust channel - second through hole, second exhaust channel - second through hole, second exhaust channel - second through hole, first through hole - first exhaust channel, second exhaust channel - second through hole, first through hole - first exhaust channel, first through hole - first exhaust channel.

[0043] Third embodiment of pneumatic switching

[0044] The difference between this embodiment and the first embodiment is that this embodiment includes three first valve positions and three second valve positions. The three first valve positions and the three second valve positions are arranged in the order of second valve position, first valve position, second valve position, first valve position, second valve position, and first valve position again.

[0045] Specifically, they are arranged in the following order: second exhaust channel - second through hole, first through hole - first exhaust channel, first through hole - first exhaust channel, first through hole - first exhaust channel, second exhaust channel - second through hole, second exhaust channel - second through hole, second exhaust channel - second through hole, first through hole - first exhaust channel, second exhaust channel - second through hole, first through hole - first exhaust channel, second exhaust channel - second through hole, first through hole - first exhaust channel.

[0046] Fourth embodiment of pneumatic switching

[0047] The difference between this embodiment and the first embodiment is that at least one second exhaust passage extends along the outer peripheral wall of the valve core to the opening at the top of the valve body, and each second exhaust passage is connected to the third exhaust passage.

[0048] Optionally, a second exhaust passage extends along the outer peripheral wall of the valve core to the top opening of the valve body, and the various second exhaust passages are interconnected through a fourth exhaust passage. The fourth exhaust passage extends along the circumference of the valve core on the outer peripheral wall of the valve core, and the fourth exhaust passage is spaced apart from the third exhaust passage.

[0049] Fifth embodiment of pneumatic switching

[0050] The difference between this embodiment and the first embodiment is that each second exhaust passage extends along the outer peripheral wall of the valve core to the opening at the top of the valve body, and a first exhaust passage is connected to a second exhaust passage; or, at least one second exhaust passage extends along the outer peripheral wall of the valve core to the opening at the top of the valve body, and each second exhaust passage is connected to each other through a fourth exhaust passage, which extends circumferentially along the outer peripheral wall of the valve core.

[0051] Optionally, each second exhaust passage extends along the outer peripheral wall of the valve core to the opening at the top of the valve body.

[0052] The present invention also provides a mold (not shown in the figure) including the above-mentioned pneumatic changeover switch 1. The mold further includes two or more cylinders 7, each cylinder 7 is connected to a corresponding air hole group 42, the air inlet of the cylinder 7 is connected to the first air hole 420, and the air outlet of the cylinder 7 is connected to the corresponding second air hole 421.

[0053] Finally, it should be emphasized that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. Pneumatic switching mechanism, including valve body and valve core. The valve body is provided with a first cavity with a top opening; The valve core is rotatably disposed in the first cavity, and the valve core and the valve body are engaged in an axial upper limit fit of the valve core; An air source hole is provided on the bottom wall of the valve body; three groups of air holes are arranged sequentially along the circumference of the valve body according to the hole spacing on the peripheral wall of the valve body. Its features are: Each of the aforementioned pore groups includes a first pore and a second pore arranged at intervals; The valve core has a second cavity with a bottom opening, and the air source hole communicates with the second cavity. The peripheral wall of the valve core includes two first valve positions and three second valve positions arranged along the circumference of the valve core. The three second valve positions and the two first valve positions are arranged in the order of second valve position, first valve position, second valve position, first valve position, and second valve position. The first second valve position includes two second through holes and two second exhaust passages, the second second valve position includes three second through holes and three second exhaust passages, and the third second valve position includes one second through hole and one second exhaust passage. When the first vent is connected to the outside through the second exhaust channel, the corresponding second vent is connected to the second cavity through the corresponding second through hole; The first first valve position includes three first through holes and three first exhaust passages, and the first first valve position is located between the first second valve position and the second second valve position. The second first valve position includes one first through hole and one first exhaust passage, and the second first valve position is located between the second second valve position and the third second valve position. When the first vent is connected to the second cavity through the first through hole, the corresponding second vent is connected to the outside through the corresponding first exhaust passage; The adjacent second through holes are spaced apart according to the hole position spacing, the adjacent first through holes are spaced apart according to the hole position spacing, and the adjacent first through holes and second through holes are spaced apart according to the hole position spacing.

2. The pneumatic switching switch according to claim 1, characterized in that: At least one second exhaust passage extends along the outer peripheral wall of the valve core to the opening at the top of the valve body, and the second exhaust passages are interconnected. Alternatively, each of the second exhaust passages extends along the outer peripheral wall of the valve core to the opening at the top of the valve body.

3. The pneumatic switching device according to claim 2, characterized in that: At least one first exhaust passage is connected to a second exhaust passage, and each of the first exhaust passages is interconnected. Alternatively, one of the first exhaust channels is connected to one of the second exhaust channels; Alternatively, each of the first exhaust passages extends along the outer peripheral wall of the valve core to the top opening of the valve body; Alternatively, at least one of the first exhaust passages extends along the outer peripheral wall of the valve core to the top opening of the valve body, and the first exhaust passages are interconnected.

4. The pneumatic switching device according to any one of claims 1 to 3, characterized in that: The first vent and the second vent are arranged at intervals along the axial direction.

5. Pneumatic switching mechanism, including valve body and valve core. The valve body is provided with a first cavity with a top opening; The valve core is rotatably disposed in the first cavity, and the valve core and the valve body are engaged in an axial upper limit fit of the valve core; An air source hole is provided on the bottom wall of the valve body; three groups of air holes are arranged sequentially along the circumference of the valve body according to the hole spacing on the peripheral wall of the valve body. Its features are: Each of the aforementioned pore groups includes a first pore and a second pore arranged at intervals; The valve core has a second cavity with a bottom opening, and the air source hole communicates with the second cavity. The peripheral wall of the valve core includes three first valve positions and two second valve positions arranged along the circumference of the valve core. The three first valve positions and two second valve positions are arranged in the order of first valve position, second valve position, first valve position, second valve position, and first valve position. The first first valve position includes three first through holes and three first exhaust passages; the second first valve position includes one first through hole and one first exhaust passage; and the third first valve position includes two first through holes and two first exhaust passages. When the second vent is connected to the outside through the first exhaust channel, the corresponding first vent is connected to the second cavity through the corresponding first through hole; The first second valve position includes three second through holes and three second exhaust passages. The first second valve position is located between the first first valve position and the second first valve position. The second second valve position includes one second through hole and one first through hole. The second second valve position is located between the second first valve position and the third first valve position. When the second vent is connected to the second cavity through the second through hole, the corresponding first vent is connected to the outside through the corresponding second exhaust passage; The adjacent first through holes are spaced apart according to the hole position spacing, the adjacent second through holes are spaced apart according to the hole position spacing, and the adjacent second through holes and the first through holes are spaced apart according to the hole position spacing.

6. Pneumatic switching mechanism, including valve body and valve core. The valve body is provided with a first cavity with a top opening; The valve core is rotatably disposed in the first cavity, and the valve core and the valve body are engaged in an axial upper limit fit of the valve core; An air source hole is provided on the bottom wall of the valve body; three groups of air holes are arranged sequentially along the circumference of the valve body according to the hole spacing on the peripheral wall of the valve body. Its features are: Each of the aforementioned pore groups includes a first pore and a second pore arranged at intervals; The valve core has a second cavity with a bottom opening, and the air source hole communicates with the second cavity. The peripheral wall of the valve core includes three first valve positions and three second valve positions arranged along the circumference of the valve core. The three first valve positions and three second valve positions are arranged in the order of second valve position, first valve position, second valve position, first valve position, second valve position, and first valve position. The first second valve position includes a second through hole and a second exhaust passage; the second second valve position includes three second through holes and three second exhaust passages; and the third second valve position includes a second through hole and a second exhaust passage. When the second vent is connected to the second cavity through the second through hole, the corresponding first vent is connected to the outside through the corresponding second exhaust passage; The first first valve position includes three first through holes and three first exhaust passages. The first first valve position is located between the first second valve position and the second second valve position. The second first valve position includes one first through hole and one first exhaust passage. The second first valve position is located between the second second valve position and the third second valve position. The third first valve position is located after the third second valve position. When the second vent is connected to the outside through the first exhaust channel, the corresponding first vent is connected to the second cavity through the corresponding first through hole; The adjacent first through holes are spaced apart according to the hole position spacing, the adjacent second through holes are spaced apart according to the hole position spacing, and the adjacent second through holes and the first through holes are spaced apart according to the hole position spacing.

7. A mold characterized in that, Includes a cylinder and a pneumatic switching device as described in any one of claims 1 to 6; The number of cylinders is three, and each cylinder is connected to one of the air hole groups. The air inlet of the cylinder is connected to the first air hole, and the air outlet of the cylinder is connected to the corresponding second air hole.

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