A portable road dust detection device

Abstract

The present invention relates to the field of dust detection equipment, specifically a portable road dust detection device, including a detection tube and a detector, and also including a box shell with a box cover, the bottom of the box shell is provided with moving wheels, the inside of the box shell is provided with a folding and unfolding mechanism, a lifting plate is provided on the folding and unfolding mechanism, a plunger plate is slidably connected inside the detection tube, a detector is fixed in the middle of the plunger plate, a lifting mechanism is provided on the lifting plate, the lifting mechanism is connected to the wing plate, the folding and unfolding mechanism drives the lifting mechanism to lift the detection tube in the process of driving the lifting plate to move out of the box shell, a pumping mechanism is provided on the lifting plate, the lifting mechanism drives the pumping mechanism to blow air into the detection tube while lowering the detection tube to remove dust adhered to the inner wall of the detection tube. This portable road dust detection device can realize the unfolding and storage of the detection tube and the detector, blow air into the detection tube to remove dust adhered to the inner wall of the detection tube, keep the next detection from being affected by the previous detection, and improve the accuracy of the detection operation.

Description

Technical Field

[0001] The invention relates to the field of dust detection equipment, in particular to a portable road dust detection device. Background Art

[0002] Road dust is the most common type of dust and the most common dust in people's lives. In order to prevent and control dust, it is necessary to use a dust detection device to detect dust pollution. Conventional dust detection devices are not easy to carry, store and manage during use. Therefore, it is very inconvenient to move the detection site to a new location in an outdoor working environment. Moreover, after the detection is completed, the dust from the previous detection is easily adhered to the inside of the detection cavity, affecting the accuracy of the next detection. In view of this, we propose a portable road dust detection device. Summary of the invention

[0003] The purpose of the present invention is to provide a portable road dust detection device to solve the problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solutions: a portable road dust detection device, including a detection tube and a detector, the detection tube is provided with an air inlet and an air outlet, and also includes a box shell with a box cover, and the bottom of the box shell is provided with a moving wheel, a retracting and unfolding mechanism is provided inside the box shell, and a lifting plate is provided on the retracting and unfolding mechanism, a plunger plate is slidably connected inside the detection tube, and a detector is fixed in the middle of the plunger plate, two wing plates are fixed on the upper end of the outer peripheral wall of the detection tube, the detector is fixed on the lifting plate, a lifting mechanism is provided on the lifting plate, and the lifting mechanism is connected to the wing plate, the retracting and unfolding mechanism drives the lifting mechanism to lift the detection tube in the process of driving the lifting plate to move out of the box shell, a pumping mechanism is provided on the lifting plate, and the lifting mechanism drives the pumping mechanism to blow air into the detection tube while lowering the detection tube to remove the dust adhering to the inner wall of the detection tube.

[0004] Preferably, the retracting and unfolding mechanism includes two slide cylinders hinged on the internal boss of the box shell, and a slide rod is inserted into the interior of the slide cylinder, a slide plate is slidably connected in the slide cylinder, the two slide rods are respectively fixedly connected to the two slide plates, the middle parts of the two slide rods are respectively hinged to the two ends of connecting rod one, incomplete gears are fixed to the ends of the two slide rods located on the outside of the corresponding slide cylinders, the two incomplete gears are fixedly connected to the bottom surface of the lifting plate, and the lifting plate and the upper surface of the boss are arranged parallel to each other, and the two slide cylinders are arranged parallel to each other.

[0005] Preferably, an air pump is fixed to the inner bottom surface of the box shell, the lower end of the pump barrel is hinged on the inner bottom surface of the box shell, the interior of the pump barrel is slidably connected to a piston plate, a push-pull rod is fixed on the piston plate, and the end of the push-pull rod away from the piston plate passes through the upper end of the pump barrel and is hinged to the middle part of the outer wall of one of the slide barrels, and the piston plate divides the interior of the pump barrel into cavity one and cavity two, the air pump is connected to cavity one through an air pipe one, and cavity two is connected to the interiors of the two slide barrels respectively through two air pipes two.

[0006] Preferably, the lifting mechanism includes two sets of shaft frames fixed on the bottom surface of the lifting plate, and the two sets of shaft frames are connected to screws for fixed-axis rotation, one end of the screw is coaxially fixedly connected to gear one, and the two incomplete gears are arranged in a one-to-one correspondence with the two gears.

[0007] Preferably, the screw is provided with two sections of external threads with opposite rotation directions, and two screw sleeves are sleeved on the screw. The screw is threadably connected to the two screw sleeves through the external threads at both ends thereof. A convex rod is fixed on the outer peripheral wall of the screw sleeve, and a strip-shaped through groove corresponding to the convex rod is provided on the lifting plate. The convex rod passes through the corresponding strip-shaped through groove and can slide in the strip-shaped through groove.

[0008] Preferably, the lifting mechanism also includes a scissor rod group corresponding to the wing plates one by one, and the two ends of the lower end of the scissor rod group are respectively hinged to the upper ends of the corresponding two protruding rods, and the two ends of the upper end of the scissor rod group are respectively hinged to the corresponding wing plates through connecting rod 2.

[0009] Preferably, the upper surface of the plunger plate is connected to the gear ring in a fixed-axis rotation manner, and bristles are fixed on the outer side wall of the gear ring.

[0010] Preferably, the inner ring of the ratchet is rotatably connected to the upper surface of the plunger plate, and the outer ring of the ratchet is meshingly connected to the inner teeth of the gear ring. A twisted rod is fixed on the inner top wall of the detection tube, and the twisted rod freely passes through the through hole opened on the plunger plate. The twisted rod passes through and is adaptively slidably connected to the center of the inner ring of the ratchet.

[0011] Preferably, the air pumping mechanism comprises two pump barrels 2 fixed on the lifting plate, the interior of the pump barrel 2 is slidably connected to a piston plate 2, and the upper ends of the two piston plates 2 are respectively fixedly connected to the two wing plates.

[0012] Preferably, one-way valve one and one-way valve two are fixed and connected on the side wall of the lower end of pump barrel two, a filter cover is fixed on the air inlet end of one-way valve one, and the air outlet end of one-way valve two is connected to the air hole opened on the plunger plate through air pipe three, and the air outlet end of the air hole points to the bristles.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In the present invention, the lifting plate is driven to move out of the box shell by the retracting and unfolding mechanism, and when the lifting plate just moves out of the box shell, the retracting and unfolding mechanism automatically drives the lifting mechanism to lift the detection tube, thereby realizing the unfolding of the entire device.

[0015] In the present invention, during the process of storing the entire device, the detection tube is lowered by using a lifting mechanism, and the gear ring drives the bristles to clean the inner wall of the detection tube. At the same time, the lifting mechanism drives the pump air mechanism to blow air into the detection tube to remove dust adhered to the inner wall of the detection tube, thereby achieving cleaning of the interior of the detection tube while storing it, so as to ensure that the next detection is not affected by the previous detection, thereby improving the accuracy of the detection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall assembly cross-section structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the general assembly cross-section storage structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the detection cylinder, the plunger plate and the pump cylinder in the present invention;

[0019] Figure 4 for Figure 3 AA cross-sectional structure diagram in;

[0020] Figure 5 for Figure 3 The enlarged structural diagram at B in FIG.

[0021] In the figure: 1, box shell; 2, box cover; 3, air pump; 4, pump barrel 1; 5, piston plate 1; 6, cavity 1; 7, cavity 2; 8, push-pull rod 1; 9, air pipe 1; 10, air pipe 2; 11, slide cylinder; 12, slide rod; 13, slide plate; 14, connecting rod 1; 15, incomplete gear; 16, lifting plate; 17, gear 1; 18, pump barrel 2; 19, wing plate; 20, push-pull rod 2; 21, air inlet; 22, air outlet 1. The first part of the invention comprises the following parts: 1. a first part, a second part, a second part, a third part, a fourth part, a fourth part, a fifth ... DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figures 1 to 5 The present invention provides a technical solution: a portable road dust detection device, comprising a detection tube 23 and a detector 24, the detection tube 23 is provided with an air inlet 21 and an air outlet 22, and also comprises a box shell 1 with a box cover 2, and the bottom of the box shell 1 is provided with moving wheels, a retracting and unfolding mechanism is provided inside the box shell 1, and a lifting plate 16 is provided on the retracting and unfolding mechanism, a plunger plate 32 is slidably connected inside the detection tube 23, and a detector 24 is fixed to the middle of the plunger plate 32, two wing plates 19 are fixed to the upper end of the outer peripheral wall of the detection tube 23, the detector 24 is fixed on the lifting plate 16, and a lifting mechanism is provided on the lifting plate 16, and the lifting mechanism is connected to the wing plate 19, and the retracting and unfolding mechanism drives the lifting plate 16 to move out of the box shell 1, and drives the lifting mechanism to lift the detection tube 23, and an air pumping mechanism is provided on the lifting plate 16, and the lifting mechanism drives the air pumping mechanism to blow air into the detection tube 23 while lowering the detection tube 23 to remove dust adhered to the inner wall of the detection tube 23.

[0024] In this embodiment, the retracting and unfolding mechanism includes two slide cylinders 11 hinged on the internal boss of the box shell 1, and a slide rod 12 is inserted into the interior of the slide cylinder 11, and a slide plate 13 is slidably connected in the slide cylinder 11. The two slide rods 12 are respectively fixedly connected to the two slide plates 13, and the middle parts of the two slide rods 12 are respectively hinged at the two ends of the connecting rod 14. The ends of the two slide rods 12 located on the outer sides of the corresponding slide cylinders 11 are fixed with incomplete gears 15. The two incomplete gears 15 are fixedly connected to the bottom surface of the lifting plate 16, and the lifting plate 16 and the upper surface of the boss are arranged parallel to each other. The slide cylinders 11 are arranged parallel to each other, and an air pump 3 is fixed to the inner bottom surface of the box shell 1. The lower end of the pump cylinder 4 is hinged on the inner bottom surface of the box shell 1, and the interior of the pump cylinder 4 is slidably connected to a piston plate 5. A push-pull rod 8 is fixed on the piston plate 5, and the end of the push-pull rod 8 away from the piston plate 5 passes through the upper end of the pump cylinder 4 and is hinged to the middle part of the outer wall of one of the slide cylinders 11, and the piston plate 5 divides the interior of the pump cylinder 4 into a cavity 16 and a cavity 27. The air pump 3 is connected to the cavity 16 through an air pipe 9, and the cavity 27 is connected to the interiors of the two slide cylinders 11 respectively through two air pipes 210.

[0025] In this embodiment, the lifting mechanism includes two groups of shaft frames 37 fixed to the bottom surface of the lifting plate 16, and the two groups of the shaft frames 37 are connected to the screw rod 38 for fixed axis rotation. One end of the screw rod 38 is coaxially fixedly connected to the gear 17. The two incomplete gears 15 are arranged one by one with the two gears 17. The screw rod 38 is provided with two sections of external threads with opposite rotation directions, and two screw sleeves 39 are sleeved on the screw rod 38. The screw rod 38 is threadedly connected to the two screw sleeves 39 through the external threads at both ends thereof. A convex rod 40 is fixed on the outer peripheral wall of the screw sleeve 39, and a strip through groove 41 corresponding to the convex rod 40 is provided on the lifting plate 16. The convex rod 40 passes through the corresponding strip through groove 41 and can slide in the strip through groove 41.

[0026] In this embodiment, the lifting mechanism also includes a scissor rod group 42 corresponding to the wing plate 19 one by one, and the two ends of the lower end of the scissor rod group 42 are respectively hinged to the upper ends of the corresponding two protruding rods 40, and the two ends of the upper end of the scissor rod group 42 are respectively hinged to the corresponding wing plate 19 through the connecting rod 2 43.

[0027] In this embodiment, the upper surface of the plunger plate 32 is rotatably connected to the gear ring 26, and bristles 33 are fixed on the outer wall of the gear ring 26. The inner ring of the ratchet 34 is rotatably connected to the upper surface of the plunger plate 32, and the outer ring of the ratchet 34 is meshed with the inner teeth of the gear ring 26. A twisted rod 25 is fixed on the inner top wall of the detection tube 23, and the twisted rod 25 can freely pass through the through hole 35 opened on the plunger plate 32. The twisted rod 25 passes through and is slidably connected to the center of the inner ring of the ratchet 34.

[0028] In this embodiment, the air pumping mechanism includes two pump barrels 18 fixed on the lifting plate 16, the interior of the pump barrel 18 is slidably connected to the piston plate 27, the upper ends of the two piston plates 27 are respectively fixedly connected to the two wing plates 19, and the lower end side walls of the pump barrel 18 are fixed and connected to the one-way valve 1 28 and the one-way valve 2 30. The air inlet end of the one-way valve 1 28 is fixed with a filter cover 29, and the air outlet end of the one-way valve 2 30 is connected to the air hole 36 opened on the plunger plate 32 through the air pipe 3 31, and the air outlet end of the air hole 36 points to the bristles 33.

[0029] Working principle and advantages of the present invention: When the portable road dust detection device is used, the working process is as follows:

[0030] like Figure 1 and Figure 2 As shown, Figure 1 In the expanded state, Figure 2 In the storage state, when the road dust detection operation is carried out, the box shell 1 is moved to the detection location by the moving wheels, and then the box cover 2 is opened, and the air pump 3 is started to work, so that the air pump 3 conveys air to the cavity 6 through the air pipe 9, so that the piston plate 5 applies thrust to the slide cylinder 11 through the push-pull rod 8, so that it Figure 1 and Figure 2 The piston plate 15 moves in the pump barrel 4 and delivers the air in the cavity 7 to the two slide cylinders 11 through the two air pipes 10, so that the slide plate 13 drives the slide rod 12 to extend to the outside of the slide cylinder 11, thereby further rising while the lifting plate 16 rotates clockwise, so as to detect dust at a higher altitude, broaden the detection height range, and facilitate storage.

[0031] When the test is finished and the test tube 23 and the detector 24 need to be put back into the housing 1, the air in the cavity 6 is pumped out by the air pump 3, so that the piston plate 5 applies a pulling force to the slide cylinder 11 through the push-pull rod 8, so that the slide cylinder 11 is pulled back. Figure 1 and Figure 2 The slide cylinder 11 rotates counterclockwise, so the lifting plate 16 is driven to rotate counterclockwise and keep the lifting plate 16 horizontal while the slide cylinder 11 rotates counterclockwise. The piston plate 15 moves in the pump cylinder 14 and sucks the air of the two slide cylinders 11 into the cavity 27 through the two air pipes 2, so that the slide plate 13 drives the slide rod 12 to retract to the inside of the slide cylinder 11, thereby storing the lifting plate 16 in the box shell 1, and then the box cover 2 is closed. Then, the box shell 1 is moved to the next detection location by the moving wheels. The operation is simple and convenient.

[0032] As mentioned above, when the lifting plate 16 is just moved out of the housing 1, Figure 3 , Figure 4 and Figure 5 As shown, the teeth on the incomplete gear 15 are meshed with the corresponding gear 17, so that the incomplete gear 15 drives the corresponding screw 38 to rotate through the gear 17, so that the screw 38 drives the two screw sleeves 39 to approach each other through the threaded transmission, and then the scissor rod group 42 is increased in height so that the wing plate 19 is subjected to a lifting force, thereby driving the detection cylinder 23 to move upward, so that the detection cylinder 23 and the plunger plate 32 form a detection cavity, and the detection cylinder 23 moves upward while driving the twisted rod 25 upward, so that the twisted rod 25 drives the inner ring of the ratchet 34 to rotate. At this time, the inner ring of the ratchet 34 cannot drive the outer ring to rotate through the pawl, and when the wing plate 19 drives the detection cylinder 23 to move upward, it drives the piston plate 27 to move upward through the push-pull rod 20, so that the piston plate 27 sucks the external air into the pump barrel 2 18 through the one-way valve 1 28, wherein the filter cover 29 plays a role in filtering and purifying the air.

[0033] When the lifting plate 16 approaches the inside of the box shell 1, the teeth on the incomplete gear 15 are meshed with the corresponding gear 17, so that the incomplete gear 15 drives the corresponding screw 38 to rotate in the opposite direction through the gear 17, so that the screw 38 drives the two screw sleeves 39 to move away from each other through the threaded transmission, and then the scissor rod group 42 is reduced in height, so that the wing plate 19 is subjected to a downward pulling force, thereby driving the detection tube 23 to move downward, so that the plunger plate 32 squeezes out the air and dust in the detection chamber, and the detection tube 23 moves downward while driving the twisted rod 25 downward, so that the twisted rod 25 drives the inner ring of the ratchet 34 to rotate in the opposite direction. At this time, the ratchet 34 The inner ring can drive the outer ring to rotate through the pawl, so that the ratchet 34 drives the gear ring 26 to rotate, and then the gear ring 26 drives the bristles 33 to clean the inner wall of the detection cylinder 23, and while the wing plate 19 moves downward, the push-pull rod 20 drives the piston plate 27 to move downward in the pump barrel 18, so that the air in the pump barrel 18 is transported to each air hole 36 through the air pipe 31, so that the air hole 36 discharges the air flow to blow away the dust on the inner wall of the detection cylinder 23 and between the bristles 33, so that when the detection cylinder 23 is stored, the dust in the detection cylinder 23 is automatically cleaned, so as to keep the detection data accurate during the next detection.

[0034] When the lifting plate 16 is about to enter the housing 1, the teeth on the incomplete gear 15 are disengaged from the corresponding gear 17, thereby keeping the detection tube in the storage state and entering the housing, with a simple structure and convenient operation.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A portable road dust detection device, comprising a detection tube (23) and a detector (24), wherein the detection tube (23) is provided with an air inlet (21) and an air outlet (22), and characterized in that: It also comprises a box shell (1) with a box cover (2), and a moving wheel is arranged at the bottom of the box shell (1), a retracting and extending mechanism is arranged inside the box shell (1), and a lifting plate (16) is arranged on the retracting and extending mechanism, a plunger plate (32) is slidably connected inside the detection tube (23), and a detector (24) is fixed in the middle of the plunger plate (32), two wing plates (19) are fixed at the upper end of the outer peripheral wall of the detection tube (23), and the detection tube (24) is fixed on the lifting plate (16), and a lifting mechanism is arranged on the lifting plate (16), and the lifting mechanism is connected to the wing plate (19), and when the retracting and extending mechanism drives the lifting plate (16) to move out of the box shell (1), the lifting mechanism is driven to lift the detection tube (23), and an air pumping mechanism is arranged on the lifting plate (16), and when the lifting mechanism lowers the detection tube (23), the air pumping mechanism is driven to blow air into the detection tube (23) to remove dust adhering to the inner wall of the detection tube (23); The upper surface of the plunger plate (32) is connected to the gear ring (26) in a fixed-axis rotation manner, and the outer wall of the gear ring (26) is fixed with bristles (33), the inner ring of the ratchet (34) is connected to the upper surface of the plunger plate (32) in a fixed-axis rotation manner, and the outer ring of the ratchet (34) is meshed with the inner teeth of the gear ring (26), a twisted rod (25) is fixed to the inner top wall of the detection tube (23), and the twisted rod (25) freely passes through the through hole (35) opened on the plunger plate (32), and the twisted rod (25) passes through and is adaptively slidably connected to the center of the inner ring of the ratchet (34); The air pump mechanism comprises two pump barrels (18) fixed on the lifting plate (16), the interior of the pump barrels (18) is slidably connected to the piston plate (27), the upper ends of the two piston plates (27) are respectively fixedly connected to the two wing plates (19), a check valve (28) and a check valve (30) are fixed on the side wall of the lower end of the pump barrel (18) and are connected, a filter cover (29) is fixed on the air inlet end of the check valve (28), and the air outlet end of the check valve (30) is connected to the air hole (36) opened on the plunger plate (32) through the air pipe (31), and the air outlet end of the air hole (36) points to the bristles (33).

2. A portable road dust detection device according to claim 1, characterized in that: The retracting and unfolding mechanism comprises two slide cylinders (11) hinged on the internal boss of the box shell (1), and a slide rod (12) is inserted inside the slide cylinder (11), a slide plate (13) is slidably connected inside the slide cylinder (11), the two slide rods (12) are respectively fixedly connected to the two slide plates (13), the middle parts of the two slide rods (12) are respectively hinged to the two ends of the connecting rod (14), and the ends of the two slide rods (12) located outside the corresponding slide cylinders (11) are fixed with incomplete gears (15), and the two incomplete gears (15) are fixedly connected to the bottom surface of the lifting plate (16) for rotation, and the lifting plate (16) and the upper surface of the boss are arranged parallel to each other, and the two slide cylinders (11) are arranged parallel to each other.

3. A portable road dust detection device according to claim 2, characterized in that: An air pump (3) is fixed to the inner bottom surface of the casing (1), the lower end of a pump barrel (4) is hinged on the inner bottom surface of the casing (1), the interior of the pump barrel (4) is slidably connected to a piston plate (5), a push-pull rod (8) is fixed to the piston plate (5), and the end of the push-pull rod (8) away from the piston plate (5) passes through the upper end of the pump barrel (4) and is hinged to the middle part of the outer wall of one of the slide cylinders (11), and the piston plate (5) divides the interior of the pump barrel (4) into a cavity (6) and a cavity (7), the air pump (3) is connected to the cavity (6) through an air pipe (9), and the cavity (7) is connected to the interior of the two slide cylinders (11) through two air pipes (10).

4. A portable road dust detection device according to claim 2, characterized in that: The lifting mechanism comprises two sets of shaft frames (37) fixed to the bottom surface of the lifting plate (16), and the two sets of shaft frames (37) are rotatably connected to screw rods (38), one end of the screw rod (38) is coaxially fixedly connected to gear one (17), and the two incomplete gears (15) are arranged in a one-to-one correspondence with the two gear ones (17).

5. A portable road dust detection device according to claim 4, characterized in that: The screw rod (38) is provided with two sections of external threads with opposite rotation directions, and two screw sleeves (39) are sleeved on the screw rod (38). The screw rod (38) is threadedly connected with the two screw sleeves (39) via the external threads at both ends thereof. A convex rod (40) is fixed on the outer peripheral wall of the screw sleeve (39), and a strip-shaped through groove (41) corresponding to the convex rod (40) is provided on the lifting plate (16). The convex rod (40) passes through the corresponding strip-shaped through groove (41) and can slide in the strip-shaped through groove (41).

6. A portable road dust detection device according to claim 5, characterized in that: The lifting mechanism further comprises a scissor rod group (42) corresponding one to one with the wing plates (19), and two ends of the lower end of the scissor rod group (42) are respectively hinged to the upper ends of the corresponding two protruding rods (40), and two ends of the upper end of the scissor rod group (42) are respectively hinged to the corresponding wing plates (19) through connecting rod 2 (43).

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