A trigger switched drive

Abstract

The application relates to the technical field of air path control equipment, and discloses a trigger type switching driving device which comprises a base, the base is provided with a first driver, a second driver, a first switching switch, a second switching switch and an electromagnetic valve; a first driving gas port one of the first driver is connected with a first pipeline, and a first driving gas port two is connected with a second pipeline; a first switching gas port one of the first switching switch is connected with a sixth pipeline and a twelfth pipeline, and a first switching gas port two is connected with a fifth pipeline, a third pipeline and the second driver; a second driving gas port one of the second driver is connected with the third pipeline, and a second driving gas port two is connected with a fourth pipeline; a second switching gas port one of the second switching switch is connected with a seventh pipeline and the second pipeline, and a second switching gas port two is connected with an eighth pipeline and a ninth pipeline. The cooperation of the first driver, the first switching switch, the second driver and the second switching switch can complete driving direction switching, the structure is light and simple, the reliability is high, and the cost can be saved.

Description

Technical Field

[0001] This invention relates to the field of pneumatic control equipment technology, and in particular to a trigger-type switching drive device. Background Technology

[0002] With the rapid development of industrial automation, mechanical transmission, and precision control, the requirements for the functionality and adaptability of drive devices in the field of pneumatic control are increasing. As actuators, drive devices can be combined with various equipment. For example, when combined with valves, they can achieve frictionless valve switching; when combined with automated production lines, they can achieve fast and precise driving, greatly increasing equipment efficiency. However, existing technologies still have the following problems: most current drive devices achieve switching between different driving directions through electric adjustment. Electric adjustment is highly dependent on servo motors, encoders, and closed-loop control systems. Although it can achieve high-precision adjustment, it is costly and complex to maintain, making it difficult to popularize in small and medium-sized equipment. Summary of the Invention

[0003] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0004] A trigger-type switching drive device includes a base (1), the base (1) being provided with a first driver (2), a second driver (3), a first switching switch (4), a second switching switch (5) and a solenoid valve (6).

[0005] The solenoid valve (6) includes an air inlet (9) and two air ports. One air port is connected to the tenth pipeline (601), and the other air port is connected to the eleventh pipeline (602). The tenth pipeline (601) is connected to the first pipeline (201) and the twelfth pipeline (603) through a three-way valve (7). The eleventh pipeline (602) is connected to the fourth pipeline (302) and the ninth pipeline (503) through a three-way valve (7).

[0006] The first driver (2) includes a first piston rod (21), a first driving air port one (22), and a first driving air port two (23). The first piston rod (21) is directly opposite the first switching switch (4). The first driving air port one (22) is connected to the other end of the first pipeline (201), and the first driving air port two (23) is connected to a second pipeline (202).

[0007] The first switching switch (4) includes a first trigger rod (41), a first housing (43), a first switching port one (47) and a first switching port two (48). The first trigger rod (41) is slidably adapted to the first housing (43) and is directly opposite the first piston rod (21). The first switching port one (47) is connected to a sixth pipeline (402). The other end of the sixth pipeline (402) is connected to the twelfth pipeline (603) through a reducing diameter straight-through (8). The first switching port two (48) is connected to a fifth pipeline (401). The fifth pipeline (401) is connected to a third pipeline (301) through a reducing diameter straight-through (8). The other end of the third pipeline (301) is connected to the second driver (3).

[0008] The second driver (3) includes a second piston rod (31), a second driving air port one (32), and a second driving air port two (33). The second piston rod (31) is directly opposite the second switching switch (5). The second driving air port one (32) is connected to the other end of the third pipeline (301), and the second driving air port two (33) is connected to the fourth pipeline (302).

[0009] The second switching switch (5) includes a second trigger rod (51), a second housing (53), a second switching air port one (57) and a second switching air port two (58). The second trigger rod (51) is slidably adapted to the second housing (53) and is directly opposite the second piston rod (31). The second switching air port one (57) is connected to a seventh pipeline (501). The seventh pipeline (501) is connected to the second pipeline (202) through a reducing diameter straight-through (8). The second switching air port two (58) is connected to an eighth pipeline (502). The eighth pipeline (502) is connected to the ninth pipeline (503) through a reducing diameter straight-through (8).

[0010] Furthermore, the first outer shell (43) is fitted with a first perforated bushing (45) and a first switch seat (42) from top to bottom. The first trigger rod (41) is fitted with the first perforated bushing (45) and the first switch seat (42) in sequence. The lower end of the first trigger rod (41) extends out of the first outer shell (43). The upper end of the first trigger rod (41) is provided with a first spring (46). The first outer shell (43) is provided with a first sealing cover (44) at one end near the first spring (46). The lower end face of the first sealing cover (44) abuts against the upper end face of the first perforated bushing (45). The other end of the first spring (46) is connected to the first sealing cover (44). The first perforated bushing (45) is provided with a first bushing hole (452) facing the first switching air port two (48). The first switch seat (42) is provided with a first switch seat hole (422) facing the first switching air port one (47).

[0011] The second outer shell (53) is fitted with a second perforated bushing (55) and a second switch seat (52) from top to bottom. The second trigger rod (51) is fitted with the second perforated bushing (55) and the second switch seat (52) in sequence. The lower end of the second trigger rod (51) extends out of the second outer shell (53). The upper end of the second trigger rod (51) is provided with a second spring (56). The second outer shell (53) is provided with a second sealing cover (54) at one end near the second spring (56). The lower end face of the second sealing cover (54) abuts against the upper end face of the second perforated bushing (55). The other end of the second spring (56) is connected to the second sealing cover (54). The second perforated bushing (55) is provided with a second bushing hole (552) facing the second switching air port (58). The second switch seat (52) is provided with a second switch seat hole (522) facing the second switching air port (57).

[0012] Furthermore, when the first spring (46) is compressed, the first bushing hole (452) is connected to the first switch seat hole (422), and when the second spring (56) is compressed, the second bushing hole (552) is connected to the second switch seat hole (522).

[0013] Furthermore, the upper end of the first trigger rod (41) is provided with a first sealing ring (411) that is adapted to the first bushing hole (452) and the first switch seat hole (422), and the upper end of the second trigger rod (51) is provided with a second sealing ring (511) that is adapted to the second bushing hole (552).

[0014] Furthermore, the upper end of the first sealing cover (44) is provided with a first fastening member (441), and the upper end of the second sealing cover (54) is provided with a second fastening member (541).

[0015] Furthermore, both the first driver (2) and the second driver (3) are provided with magnetic induction switches, and both the first piston rod (21) and the second piston rod (31) are provided with permanent magnets adapted to the magnetic induction switches.

[0016] The beneficial effects of this invention are:

[0017] The drive direction can be switched by the mechanical cooperation of the first driver, the first switching switch, the second driver, and the second switching switch. Its structure is simple, reliable, and can save a lot of costs. It also only requires one air source, has higher efficiency and greater adaptability to working conditions, and can meet diverse needs. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of the invention.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the switch in the open state of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the switch in the off state of the present invention;

[0023] Figure 4 for Figure 3 AA view;

[0024] Figure 5 This is a cross-sectional view of the first switching switch;

[0025] Figure 6 This is a cross-sectional view of the first driver;

[0026] Figure 7 This is a cross-sectional view of the second drive.

[0027] In the picture:

[0028] 1. Base; 2. First actuator; 21. First piston rod; 22. First drive air port one; 23. First drive air port two; 201. First pipeline; 202. Second pipeline; 3. Second actuator; 31. Second piston rod; 32. Second drive air port one; 33. Second drive air port two; 301. Third pipeline; 302. Fourth pipeline; 4. First switching switch; 41. First trigger rod; 42. First switch base; 43. First housing; 44. First sealing cover; 45. First perforated bushing; 46. First spring; 47. First switching air port one; 48. First switching air port two; 401. Fifth pipeline; 402. Sixth pipeline; 411. First sealing ring; 422. 441. First switch seat hole; 452. First bushing hole; 5. Second switch; 51. Second trigger rod; 52. Second switch seat; 53. Second housing; 54. Second sealing cover; 55. Second bushing with hole; 56. Second spring; 57. Second switching air port one; 58. Second switching air port two; 501. Seventh pipeline; 502. Eighth pipeline; 503. Ninth pipeline; 511. Second sealing ring; 522. Second switch seat hole; 541. Second fastener; 552. Second bushing hole; 6. Solenoid valve; 601. Tenth pipeline; 602. Eleventh pipeline; 603. Twelfth pipeline; 7. Three-way valve; 8. Reduced diameter straight-through valve; 9. Air source inlet nozzle. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0030] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0031] like Figures 1-7As shown, a trigger-type switching drive device includes a base 1, the base 1 being provided with a first driver 2, a second driver 3, a first switching switch 4, a second switching switch 5 and a solenoid valve 6;

[0032] The solenoid valve 6 includes an air inlet 9 and two air ports. One air port is connected to a tenth pipe 601, and the other air port is connected to an eleventh pipe 602. The tenth pipe 601 is connected to a first pipe 201 and a twelfth pipe 603 through a three-way valve 7. The eleventh pipe 602 is connected to a fourth pipe 302 and a ninth pipe 503 through a three-way valve 7.

[0033] The first driver 2 includes a first piston rod 21, a first driving air port 1 22, and a first driving air port 23. The first piston rod 21 is directly opposite the first switching switch 4. The first driving air port 1 22 is connected to the other end of the first pipeline 201. The first driving air port 23 is connected to the second pipeline 202.

[0034] The first switching switch 4 includes a first trigger rod 41, a first housing 43, a first switching port 1 47 and a first switching port 2 48. The first trigger rod 41 is slidably adapted to the first housing 43 and is directly opposite the first piston rod 21. The first switching port 1 47 is connected to a sixth pipe 402. The other end of the sixth pipe 402 is connected to the twelfth pipe 603 through a reducing diameter straight-through 8. The first switching port 2 48 is connected to a fifth pipe 401. The fifth pipe 401 is connected to a third pipe 301 through a reducing diameter straight-through 8. The other end of the third pipe 301 is connected to the second driver 3.

[0035] The second driver 3 includes a second piston rod 31, a first second driving air port 32, and a second second driving air port 33. The second piston rod 31 is directly opposite the second switching switch 5. The first second driving air port 32 is connected to the other end of the third pipeline 301, and the second second driving air port 33 is connected to the fourth pipeline 302.

[0036] The second switching switch 5 includes a second trigger rod 51, a second housing 53, a second switching air port 1 57 and a second switching air port 2 58. The second trigger rod 51 is slidably adapted to the second housing 53 and is directly opposite the second piston rod 31. The second switching air port 1 57 is connected to a seventh pipe 501, which is connected to the second pipe 202 through a reducing diameter straight-through 8. The second switching air port 2 58 is connected to an eighth pipe 502, which is connected to the ninth pipe 503 through a reducing diameter straight-through 8.

[0037] The working principle of this invention: The air inlet 9 is used to connect to an external air source. Gas is introduced into the solenoid valve 6 through the external air source. At this time, the air port on the solenoid valve 6 connected to the tenth pipe 601 is open, and the air port connected to the eleventh pipe 602 is closed. The gas in the solenoid valve 6 flows to the three-way valve 7 connected to it through the tenth pipe 601. At this time, since the first switching switch 4 is in the closed state, the gas cannot flow to the first switching switch 4 through the three-way valve 7 and the twelfth pipe 603. The gas can only flow to the first driver 2 through the first pipe 201, and then flow into the interior of the first driver 2 through the first driver air port 22, pushing the first piston rod 21 to extend outward. After the first piston rod 21 moves outward into position, it abuts against the first switching switch 4 and opens the first switching switch 4, putting the first switching switch 4 in the open state. At this time, the gas can flow to the first switching switch 4 through the twelfth pipe 603, and then flow into the interior of the first switching switch 4 through the sixth pipe 402 and the first switching air port 47. Gas flows out through the first switching port 48 and the fifth pipeline 401, then through the third pipeline 301 and the second driving port 32 to the interior of the second actuator 3, pushing the second piston rod 31 to extend outward. After the second piston rod 31 moves outward into position, it abuts against the second switching switch 5 and opens the second switching switch 5, putting it in the open state. When both the first switching switch 4 and the second switching switch 5 are in the open state, the solenoid valve 6 reverses, the port connected to the tenth pipeline 601 closes, and the port connected to the eleventh pipeline 602 opens. Gas flows from the eleventh pipeline 602 to the three-way valve 7 connected to it. Gas flows through the ninth pipeline 503 and the eighth pipeline 502 to the second switching port 58, then out through the second switching port 57, and through the second pipeline 202 and the first driving port 23 to the interior of the first actuator 2, pushing the first piston rod 21 to retract inward. The first piston rod 21 does not abut against the first switching switch 4, and the first switching switch 4 is in the closed state. Furthermore, after the first piston rod 21 of the first actuator 2 retracts to its final position, the gas flows directly through the fourth pipe 302 to the second drive port 33 and into the interior of the second actuator 3, pushing the second piston rod 31 to retract inward. The second piston rod 31 does not contact the second switching switch 5, which remains closed, thus completing the change of drive direction. Compared to traditional drive devices that use complex circuit systems to switch between different drive directions, this invention achieves drive direction switching through the mechanical cooperation of the first actuator 2, the first switching switch 4, the second actuator 3, and the second switching switch 5. Its structure is simple, reliable, and saves significant costs; it also requires only one gas source, offering higher efficiency and greater adaptability to various operating conditions, meeting diverse needs.

[0038] Specifically, such as Figure 4 and Figure 5As shown, the first outer shell 43 is fitted with a first perforated bushing 45 and a first switch seat 42 from top to bottom. The first trigger rod 41 is fitted with the first perforated bushing 45 and the first switch seat 42 in sequence, and the lower end of the first trigger rod 41 extends out of the first outer shell 43. The upper end of the first trigger rod 41 is provided with a first spring 46. The first outer shell 43 is provided with a first sealing cover 44 at one end near the first spring 46. The lower end face of the first sealing cover 44 abuts against the upper end face of the first perforated bushing 45. The other end of the first spring 46 is connected to the first sealing cover 44. The first perforated bushing 45 is provided with a first bushing hole 452 at the first switching air port 48. The first switch seat 42 is provided with a first switch seat hole 422 at the first switching air port 47.

[0039] The second outer casing 53 is fitted with a second perforated bushing 55 and a second switch seat 52 from top to bottom. The second trigger rod 51 is fitted with the second perforated bushing 55 and the second switch seat 52 in sequence, and the lower end of the second trigger rod 51 extends out of the second outer casing 53. The upper end of the second trigger rod 51 is provided with a second spring 56. The second outer casing 53 is provided with a second sealing cover 54 near the end of the second spring 56. The lower end face of the second sealing cover 54 abuts against the upper end face of the second perforated bushing 55. The other end of the second spring 56 is connected to the second sealing cover 54. The second perforated bushing 55 is provided with a second bushing hole 552 at the position directly opposite the second switching air port 58. The second switch seat 52 is provided with a second switch seat hole 522 at the position directly opposite the second switching air port 57.

[0040] Specifically, when the first spring 46 is compressed, the first bushing hole 452 is connected to the first switch seat hole 422, and when the second spring 56 is compressed, the second bushing hole 552 is connected to the second switch seat hole 522.

[0041] Specifically, the upper end of the first trigger rod 41 is provided with a first sealing ring 411 that is adapted to the first bushing hole 452 and the first switch seat hole 422, and the upper end of the second trigger rod 51 is provided with a second sealing ring 511 that is adapted to the second bushing hole 552.

[0042] Specifically, the upper end of the first sealing cover 44 is provided with a first fastening member 441, and the upper end of the second sealing cover 54 is provided with a second fastening member 541.

[0043] Specifically, both the first actuator 2 and the second actuator 3 are equipped with magnetic induction switches, and both the first piston rod 21 and the second piston rod 31 are equipped with permanent magnets adapted to the magnetic induction switches. The magnetic induction switches and permanent magnets are existing technologies and will not be described in detail here. When both the first piston rod 21 and the second piston rod 31 extend outwards and move into position, the permanent magnets on them trigger the magnetic induction switches. The magnetic induction switches then send signals to the solenoid valve 6. Only after the solenoid valve 6 receives signals from both magnetic induction switches does it begin to switch.

[0044] like Figure 4 As shown, when the first switch 4 is in the closed state, the first sealing ring 411 is located blocking the first switch seat hole 422. At this time, the first bushing hole 452 and the first switch seat hole 422 are not connected, and the first spring 46 is in the natural state. When the second switch 5 is in the closed state, the second sealing ring 511 is located between the second bushing hole 552 and the second switch seat hole 522. At this time, the second bushing hole 552 and the second switch seat hole 522 are not connected, and the second spring 56 is in the natural state. In this invention, when the first piston rod 21 extends outward, the volume between the first piston rod 21 and the first drive air port 23 gradually decreases and the pressure gradually increases, which hinders the movement of the first piston rod 21. Therefore, when the second switching switch 5 is in the closed state, the second sealing ring 511 is located between the second bushing hole 552 and the second switch seat hole 522. During the outward extension of the first piston rod 21, the air in the second pipeline 202 is compressed and the pressure increases. This pressure will generate a thrust parallel to the axis of the second trigger rod 511 on the second sealing ring 511. Under the action of this thrust, the second sealing ring 511 can be pushed, causing the second trigger rod 51 to retract inward and connect the second bushing hole 552 and the second switch seat hole 522. Excess air can flow to the solenoid valve 6 through the second switch seat hole 522 and be discharged into the atmosphere through the exhaust port provided on the solenoid valve 6 to release the air pressure. After the air pressure is released, the second trigger rod 51 moves to the closed state under the action of the second spring 56. Furthermore, to prevent the external air source from directly pushing the first trigger rod 41, the first sealing ring 411 is positioned to block the first switch seat hole 422. At this time, the air pressure of the external air source will generate a thrust perpendicular to the axis of the first trigger rod 411 on the first sealing ring 411. This thrust cannot push the first trigger rod 41, ensuring that the external air source pushes the first piston rod 21. As the first piston rod 21 moves to abut against the first trigger rod 41, the first piston rod 21 pushes the first trigger rod 41 to move. The first sealing ring 411 no longer blocks the first switch seat hole 422. The external air source generates a thrust parallel to the first trigger rod 41 on the first sealing ring 411. Under the action of this thrust and the first piston rod 21 continuing to push the first trigger rod 41, the first trigger rod 41 moves rapidly, and the first switch seat hole 422 connects with the first bushing hole 452.

[0045] Similarly, when the second piston rod 31 extends outward, excess air can flow to the solenoid valve 6 through the fourth pipe 302 and be discharged into the atmosphere through the exhaust port provided on the solenoid valve 6 to release the air pressure.

[0046] When the solenoid valve 6 reverses, gas from the external gas source flows in through the eleventh pipe 602. At this time, the gas pressure from the external gas source cannot push the second piston rod 31. The gas flows through the second bushing hole 552 and the second switch seat hole 522 to the second pipe 202, and then into the first actuator 2 to push the first piston rod 21 inward. After the first piston rod 21 retracts into place, the gas in the eleventh pipe 602 accumulates, and the gas pressure increases to the point that it can push the second piston rod 31 inward. During the inward retraction of the second piston rod 31, the second trigger rod 51 gradually resets under the action of the second spring 56. The second bushing hole 552 and the second switch seat hole 522 are no longer connected, and all the gas is used to push the second piston rod 31, accelerating the movement efficiency of the second piston rod 31. It should be noted that during the inward retraction of the first piston rod 21, the excess gas between the first piston rod 21 and the first drive air port 22 flows through the first pipe 201 and the tenth pipe 601 to the exhaust port of the solenoid valve 6. During the inward retraction of the second piston rod 31, since the first switching switch 4 is in the closed state, the gas between the second piston rod 31 and the second drive air port 32 cannot be discharged. The increased gas pressure will generate a downward thrust on the first sealing ring 411 that is parallel to the axis of the first trigger rod 41. The first spring 46 is in a stretched state, and the first switch seat hole 422 is connected to the first bushing hole 452. The excess gas can then flow through the twelfth pipe 603 to the exhaust port of the solenoid valve 6 for discharge.

[0047] (1) Unless otherwise defined, the same reference numerals in the embodiments and drawings of this disclosure have the same meaning.

[0048] (2) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0049] (3) For clarity, components or areas are enlarged in the drawings used to describe embodiments of the present disclosure. It will be understood that when an element is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element, or there may be an intermediate element.

[0050] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A trigger-based switching drive device, characterized in that: Includes a base (1), the base (1) being provided with a first driver (2), a second driver (3), a first switching switch (4), a second switching switch (5) and a solenoid valve (6); The solenoid valve (6) includes an air inlet (9) and two air ports. One air port is connected to the tenth pipeline (601), and the other air port is connected to the eleventh pipeline (602). The tenth pipeline (601) is connected to the first pipeline (201) and the twelfth pipeline (603) through a three-way valve (7). The eleventh pipeline (602) is connected to the fourth pipeline (302) and the ninth pipeline (503) through a three-way valve (7). The first driver (2) includes a first piston rod (21), a first driving air port one (22), and a first driving air port two (23). The first piston rod (21) is directly opposite the first switching switch (4). The first driving air port one (22) is connected to the other end of the first pipeline (201), and the first driving air port two (23) is connected to a second pipeline (202). The first switching switch (4) includes a first trigger rod (41), a first housing (43), a first switching port one (47) and a first switching port two (48). The first trigger rod (41) is slidably adapted to the first housing (43) and is directly opposite the first piston rod (21). The first switching port one (47) is connected to a sixth pipeline (402). The other end of the sixth pipeline (402) is connected to the twelfth pipeline (603) through a reducing diameter straight-through (8). The first switching port two (48) is connected to a fifth pipeline (401). The fifth pipeline (401) is connected to a third pipeline (301) through a reducing diameter straight-through (8). The other end of the third pipeline (301) is connected to the second driver (3). The second driver (3) includes a second piston rod (31), a second driving air port one (32), and a second driving air port two (33). The second piston rod (31) is directly opposite the second switching switch (5). The second driving air port one (32) is connected to the other end of the third pipeline (301), and the second driving air port two (33) is connected to the fourth pipeline (302). The second switching switch (5) includes a second trigger rod (51), a second housing (53), a second switching air port one (57) and a second switching air port two (58). The second trigger rod (51) is slidably adapted to the second housing (53) and is directly opposite the second piston rod (31). The second switching air port one (57) is connected to a seventh pipeline (501). The seventh pipeline (501) is connected to the second pipeline (202) through a reducing diameter straight-through (8). The second switching air port two (58) is connected to an eighth pipeline (502). The eighth pipeline (502) is connected to the ninth pipeline (503) through a reducing diameter straight-through (8).

2. The trigger-type switching drive device according to claim 1, characterized in that: The first outer shell (43) is fitted with a first perforated bushing (45) and a first switch seat (42) from top to bottom. The first trigger rod (41) is fitted with the first perforated bushing (45) and the first switch seat (42) in sequence. The lower end of the first trigger rod (41) extends out of the first outer shell (43). The upper end of the first trigger rod (41) is provided with a first spring (46). The first outer shell (43) is provided with a first sealing cover (44) at one end near the first spring (46). The lower end face of the first sealing cover (44) abuts against the upper end face of the first perforated bushing (45). The other end of the first spring (46) is connected to the first sealing cover (44). The first perforated bushing (45) is provided with a first bushing hole (452) facing the first switching air port (48). The first switch seat (42) is provided with a first switch seat hole (422) facing the first switching air port (47). The second outer shell (53) is fitted with a second perforated bushing (55) and a second switch seat (52) from top to bottom. The second trigger rod (51) is fitted with the second perforated bushing (55) and the second switch seat (52) in sequence. The lower end of the second trigger rod (51) extends out of the second outer shell (53). The upper end of the second trigger rod (51) is provided with a second spring (56). The second outer shell (53) is provided with a second sealing cover (54) at one end near the second spring (56). The lower end face of the second sealing cover (54) abuts against the upper end face of the second perforated bushing (55). The other end of the second spring (56) is connected to the second sealing cover (54). The second perforated bushing (55) is provided with a second bushing hole (552) facing the second switching air port (58). The second switch seat (52) is provided with a second switch seat hole (522) facing the second switching air port (57).

3. The trigger-type switching drive device according to claim 2, characterized in that: When the first spring (46) is compressed, the first bushing hole (452) is connected to the first switch seat hole (422), and when the second spring (56) is compressed, the second bushing hole (552) is connected to the second switch seat hole (522).

4. The trigger-type switching drive device according to claim 3, characterized in that: The upper end of the first trigger rod (41) is provided with a first sealing ring (411) that is adapted to the first bushing hole (452) and the first switch seat hole (422), and the upper end of the second trigger rod (51) is provided with a second sealing ring (511) that is adapted to the second bushing hole (552).

5. The trigger-type switching drive device according to claim 4, characterized in that: The upper end of the first sealing cover (44) is provided with a first fastening member (441), and the upper end of the second sealing cover (54) is provided with a second fastening member (541).

6. The trigger-type switching drive device according to claim 5, characterized in that: Both the first driver (2) and the second driver (3) are equipped with magnetic induction switches, and both the first piston rod (21) and the second piston rod (31) are equipped with permanent magnets adapted to the magnetic induction switches.

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