CN213735569U - Unmanned aerial vehicle and ammunition launching bin thereof - Google Patents

Abstract

The application discloses an unmanned aerial vehicle and an ammunition launching bin thereof, and relates to the technical field of unmanned aerial vehicles, the unmanned aerial vehicle comprises a fixed bin, one end of the fixed bin is opened, a sliding bin is inserted into the open end of the fixed bin in a sliding manner and is used for loading ammunition, and a limiting rod used for limiting relative sliding between the sliding bin and the fixed bin is arranged between the sliding bin and the fixed bin; the part of the sliding bin extending into the fixed bin is fixedly provided with a launching device, an ignition trigger assembly is fixedly arranged in the fixed bin, and the ignition trigger assembly is used for starting the launching device. This application has improved the security when ammunition firing storehouse is daily deposited.

Description

Unmanned aerial vehicle and ammunition launching bin thereof

Technical Field

The application relates to the technical field of unmanned aerial vehicles, especially, relate to an unmanned aerial vehicle and ammunition launching bin thereof.

Background

Military unmanned aerial vehicles are unmanned aerial vehicles controlled and operated by remote control equipment or self-contained programs, and with the wide application of high and new technologies to weaponry, the development of unmanned aerial vehicles makes a breakthrough progress. The military unmanned aerial vehicle has the characteristics of exquisite structure, strong concealment, convenient use, low manufacturing cost, flexible performance and the like, is mainly used for battlefield reconnaissance, electronic interference, carrying of weapons such as cluster bombs and guided missiles to execute aggressive missions, and is used as an aerial communication relay platform, a nuclear test sampler, a nuclear explosion and nuclear radiation reconnaissance plane and the like.

Chinese utility model patent that bulletin number is CN208419756U discloses an unmanned aerial vehicle's automatic ammunition feed magazine and ammunition firing device includes the fixed plate, the connecting plate, the body of a gun, defeated bullet area and ammunition box, the fixed plate bottom is equipped with vertical decurrent motor that turns to, the output shaft and the connecting plate fixed connection that turn to the motor, the ammunition box is fixed in the bottom of connecting plate, the body of a gun is located the ammunition box below, be connected with defeated bullet area between ammunition box and the body of a gun, the tail end of the body of a gun has cup jointed the mount, be connected with electronic hydraulic stem between mount and the connecting plate, body of a gun front end both sides are equipped with slewing mechanism, last articulated the having every single move frame of slewing mechanism.

The above prior art solutions have the following drawbacks: the ammunition box includes fixed connection's ignition part and the ammunition storehouse of loading ammunition, and for the preparation work when reducing the ammunition box and using, can load the ammunition in the ammunition storehouse, the ignition portion starts the back this moment, and the ammunition in the ammunition box just can launch away, though made things convenient for the quick use of ammunition box, but there is certain potential safety hazard when the ammunition box is daily deposited.

SUMMERY OF THE UTILITY MODEL

In order to improve the security when ammunition firing storehouse is daily deposited, this application provides an unmanned aerial vehicle and ammunition firing storehouse thereof.

An ammunition launching bin comprises a fixed bin, wherein one end of the fixed bin is opened, a sliding bin is inserted into the open end of the fixed bin in a sliding mode and used for loading ammunition, and a limiting rod used for limiting relative sliding between the sliding bin and the fixed bin is arranged between the sliding bin and the fixed bin;

the part of the sliding bin extending into the fixed bin is fixedly provided with a launching device, an ignition trigger assembly is fixedly arranged in the fixed bin, and the ignition trigger assembly is used for starting the launching device.

By adopting the technical scheme: when ammunition launching is needed, one end of the sliding bin is inserted into the opening end of the fixed bin, relative sliding between the sliding bin and the fixed bin is limited through the limiting rod, detachable connection between the fixed bin and the sliding bin is achieved, after the sliding bin is connected to the fixed bin, the ignition trigger assembly is connected with the launching device and transmits signals to the launching device to launch ammunition; when ammunition does not need to be launched, the limiting of the limiting rod on the sliding bin and the fixed bin is removed, the sliding bin is detached by moving the sliding bin to one side back to the fixed bin, the ignition trigger assembly is detachable from the launching device, and the safety of the ammunition launching bin during daily storage is improved.

Preferably, the limiting rod is positioned on one side of the ignition trigger assembly, which faces away from the opening end of the fixed bin.

By adopting the technical scheme: the realization avoids causing the influence to the connection of ignition trigger subassembly and emitter when fixed sliding chamber and fixed storehouse.

Preferably, a fixed frame is fixedly arranged in the fixed bin and is used for being fixedly connected with the ignition trigger assembly, a connecting plate is fixedly arranged on the sliding bin and can penetrate through the fixed frame, and the limiting rod penetrates through the fixed bin and the connecting plate along the direction perpendicular to the sliding direction of the sliding bin and penetrates through the part of the fixed frame;

the limiting part used for limiting the relative movement between the limiting rod and the fixed bin is arranged on the limiting rod.

By adopting the technical scheme: the connecting plate penetrates through a gap between the fixed frame and the fixed bin and is abutted against the end surface of the inner cavity of the fixed bin, so that the sliding insertion between the sliding bin and the fixed bin is realized; the connecting strength between the sliding bin and the fixed bin is increased by the limiting rod; the gag lever post wears to locate the connecting plate and passes on one end of fixed frame and the fixed storehouse, has restricted the slip between slip storehouse and the fixed storehouse, and the locating part has restricted the gag lever post simultaneously along self axial's removal, has realized spacing between slip storehouse and the fixed storehouse.

Preferably, the limiting part is a jackscrew; the side surface of the limiting rod is provided with a connecting hole, the connecting hole is positioned at the part of the limiting rod penetrating through the fixed bin, the limiting rod is in threaded connection with the jackscrew in the connecting hole, and the ball head of the jackscrew extends out of the connecting hole and can be completely pressed into the connecting hole.

By adopting the technical scheme: jackscrew and gag lever post lateral wall threaded connection, and the bulb of jackscrew is scalable, has both realized spacing to the gag lever post, and the gag lever post of being convenient for again directly passes fixed storehouse and sliding bin, simple structure, the installation operation of being convenient for.

Preferably, a guide mechanism is arranged between the fixed bin and the sliding bin.

By adopting the technical scheme: the guide mechanism has a guide effect on the sliding bin, and the sliding bin can slide into the fixed bin conveniently.

Preferably, the guide mechanism comprises a guide groove arranged in the fixed bin; the guide mechanism also comprises a guide block fixedly arranged on the sliding bin; the guide groove is used for guiding the guide block to move.

By adopting the technical scheme: the sliding bin is provided with a guide block, the fixed bin is internally provided with a guide groove for accommodating the guide block, and the guide groove guides the guide block to move into the fixed bin, so that the sliding bin is conveniently connected with the fixed bin.

Preferably, a reinforcing frame is fixedly arranged outside the sliding bin.

By adopting the technical scheme: the reinforcing frame improves the stability of the whole structure of the sliding bin.

The utility model provides an unmanned aerial vehicle, includes an ammunition firing storehouse, still includes the fuselage, fixed storehouse is provided with a plurality ofly, fixed storehouse is fixed in on the unmanned aerial vehicle fuselage along unmanned aerial vehicle span direction symmetry respectively.

By adopting the technical scheme: the ignition trigger assembly and the transmitting device can be disassembled, so that the safety of the unmanned aerial vehicle is improved; fixed storehouse is provided with a plurality ofly, has improved unmanned aerial vehicle firepower coverage.

Preferably, a triangular support is fixedly connected between the fixed bin and the machine body, and the triangular support is used for reducing damage to the machine body caused by reaction force generated by ammunition launching.

By adopting the technical scheme: the provision of the triangular supports reduces the extent to which the fuselage is damaged by the reaction forces generated when the ammunition is fired.

Preferably, a reinforcing bin for reinforcing the machine body is fixedly arranged on the machine body.

By adopting the technical scheme: the provision of the reinforced chamber reduces the likelihood of damage to the fuselage by reactive forces generated when firing the ammunition.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when ammunition launching is needed, one end of the sliding bin is inserted into the opening end of the fixed bin, relative sliding between the sliding bin and the fixed bin is limited through the limiting rod, detachable connection between the fixed bin and the sliding bin is achieved, after the sliding bin is connected to the fixed bin, the ignition trigger assembly is connected with the launching device and transmits signals to the launching device to launch ammunition; when ammunition does not need to be launched, the limit of the limit rod on the sliding bin and the fixed bin is released, the sliding bin is detached by moving the sliding bin to one side back to the fixed bin, the ignition trigger assembly and the launching device are detachable, and the safety of the ammunition launching bin during daily storage is improved;

2. the connecting plate penetrates through a gap between the fixed frame and the fixed bin and is abutted against the end surface of the inner cavity of the fixed bin, so that the sliding insertion between the sliding bin and the fixed bin is realized; the connecting strength between the sliding bin and the fixed bin is increased by the limiting rod; the limiting rod penetrates through one end of the connecting plate, which penetrates through the fixed frame, and the fixed bin, so that the sliding between the sliding bin and the fixed bin is limited, and meanwhile, the limiting piece limits the movement of the limiting rod along the axial direction of the limiting rod, so that the limiting between the sliding bin and the fixed bin is realized;

3. the guide mechanism has a guide effect on the sliding bin, and the sliding bin can slide into the fixed bin conveniently.

Drawings

FIG. 1 is a schematic overall structure diagram of the first embodiment;

FIG. 2 is a schematic view of the overall structure of a fixed bin in the first embodiment;

FIG. 3 is a schematic diagram showing the positional relationship between the ignition trigger assembly and the fixed bin in the first embodiment;

FIG. 4 is a schematic diagram of the overall structure of a fire trigger assembly in accordance with one embodiment;

FIG. 5 is a schematic view of the overall structure of the sliding chamber in the first embodiment;

FIG. 6 is a schematic sectional view of a part of the entire structure of the first embodiment;

FIG. 7 is a cross-sectional view of the overall structure of a jack screw according to an embodiment;

fig. 8 is a partial structural schematic view showing a connecting structure between an ammunition launching bin and a fuselage of the unmanned aerial vehicle in the first embodiment;

fig. 9 is a schematic view of the overall structure of the reinforcement bin in the second embodiment.

Description of reference numerals: 1. fixing the bin; 11. a strip-shaped notch; 12. a fixing frame; 121. flanging; 1211. a yielding groove; 122. a protrusion; 13. an ignition trigger assembly; 131. a circuit board; 1311. sinking a groove; 132. a contact protection plate; 1321. a hole of abdication; 133. a trigger unit; 14. supporting in a triangular mode; 2. a sliding bin; 21. a combustion chamber; 22. a reinforcing frame; 23. a connecting plate; 231. a circular notch; 3. a guide mechanism; 31. a guide groove; 32. a guide block; 321. a rectangular notch; 4. a connecting mechanism; 41. a first clamping hole; 42. a second clamping hole; 43. a limiting rod; 44. carrying out top thread; 5. a transmitting device; 6. a body; 7. a reinforcement bin; 71. and a support plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses unmanned aerial vehicle and ammunition launching bin thereof.

Example one

With reference to fig. 1 and 2, an ammunition launching bin comprises a fixed bin 1, wherein the fixed bin 1 is a rectangular bin body with a hollow inner cavity, an opening is reserved at one end of the fixed bin 1 in the length direction, and a long strip-shaped notch 11 for reducing weight is formed in the closed end of the fixed bin 1. The open end of the fixed bin 1 is detachably connected with a sliding bin 2, and the sliding bin 2 is used for filling and launching ammunition.

Fixed frame 12 of fixedly connected with rectangle in the inner chamber of fixed storehouse 1, fixed frame 12 has turn-ups 121 towards one side edge department of fixed storehouse 1 open end to the open end direction extension of fixed storehouse 1, and turn-ups 121's lateral wall is parallel and level with the lateral wall of fixed frame 12. The middle of four lateral walls of the flange 121 is fixedly connected with a protrusion 122, the protrusion 122 is fixedly connected to the inner lateral wall of the fixed bin 1, and a gap is reserved between the outer lateral wall of the fixed frame 12 and the outer lateral wall of the flange 121 and the inner lateral wall of the fixed bin 1.

Referring to fig. 3 and 4, an ignition trigger assembly 13 is fixedly mounted on the fixing frame 12, and the ignition trigger assembly 13 includes a circuit board 131 and a contact protection plate 132. The side wall of the circuit board 131 facing the contact protection board 132 is provided with sinking grooves 1311, and the sinking grooves 1311 are arranged on the circuit board 131 in a horizontal two-vertical three-array. The trigger unit 133 is fixedly connected to the sinking groove 1311, and the trigger unit 133 includes three trigger heads arranged in the transverse direction. The contact protection plate 132 is used for reducing the pressure loss of the external pressure on the circuit board 131, the position of the contact protection plate 132 corresponding to the trigger unit 133 is provided with a yielding hole 1321, and the trigger unit 133 passes through the yielding hole 1321 and extends out of one end of the contact protection plate 132 facing the opening of the fixed bin 1.

The two sides of the flange 121 along the width direction of the fixed bin 1 are respectively provided with two yielding grooves 1211, the two ends of the yielding groove 1211 along the length direction of the fixed bin 1 are provided with two yielding grooves 1211, and the yielding grooves 1211 are used for yielding the ignition trigger assembly 13. The circuit board 131 and the contact protection plate 132 are sequentially connected to the side of the fixed frame 12 facing the opening end of the fixed bin 1 by using four connecting bolts, and the four connecting bolts are respectively located at the four receding grooves 1211.

Referring to fig. 5, six combustion chambers 21 are disposed at one end of the sliding chamber 2 facing the fixed chamber 1, and the positions of the combustion chambers 21 correspond to the positions of the triggering units 133 one by one. The firing device 5 is arranged in the combustion chamber 21, the firing device 5 is in contact with the triggering unit 133, and the triggering head transmits a signal to the firing device 5 to fire the cartridge case.

At least one reinforcing frame 22 is fixedly connected to the outer peripheral surface of the sliding bin 2, two reinforcing frames 22 are arranged in the embodiment, and the arrangement of the reinforcing frames 22 increases the overall structural strength of the sliding bin 2.

With reference to fig. 3 and 5, one end of the sliding bin 2 is inserted into the open end of the fixed bin 1, a connecting mechanism 4 is arranged between the fixed bin 1 and the sliding bin 2, the connecting mechanism 4 comprises four connecting plates 23, and the four connecting plates 23 are respectively located at four edges of one end of the sliding bin 2 facing the fixed bin 1. The connecting plate 23 is an L-shaped plate with an opening facing the edge of the sliding bin 2, two circular notches 231 arranged at intervals are formed in one side of the connecting plate 23 in the width direction of the sliding bin 2, and the circular notches 231 are used for reducing weight. The connecting plate 23 extends along the length direction of the sliding bin 2, two side walls of an inner bending part of the connecting plate 23 are tightly attached to two corresponding side walls of the sliding bin 2, one end of the connecting plate 23 in the length direction is fixedly connected with the sliding bin 2 through a bolt, and the other end of the connecting plate 23 in the length direction extends out of the sliding bin 2. When sliding chamber 2 inserts in fixed storehouse 1, the one end of connecting plate 23 dorsad sliding chamber 2 inserts in fixed storehouse 1, two lateral walls of the outer bending portion of connecting plate 23 and the last corresponding both sides wall contact of fixed storehouse 1, and the connecting plate 23 passes the clearance between the outer peripheral face of fixed frame 12 and the inner peripheral surface of fixed storehouse 1 and stretches into the one side of fixed frame 12 dorsad fixed storehouse 1 open end, two lateral walls of the interior bending portion of connecting plate 23 and two corresponding lateral wall contacts on fixed frame 12, and the one end butt that connecting plate 23 deviates from sliding chamber 2 is on the inner chamber terminal surface of fixed storehouse 1 blind end.

The connecting mechanism 4 further comprises a first clamping hole 41 formed in the fixed bin 1, the first clamping hole 41 is located on one side, back to the open end of the fixed bin 1, of the ignition and emission assembly, the axis of the first clamping hole 41 is arranged along the length direction of the fixed bin 1, the first clamping hole 41 penetrates through two side walls, back to back, of the outer side of the fixed bin 1 in the length direction, and two first clamping holes 41 are arranged on two sides of the fixed bin 1 in the width direction at intervals.

The connecting plate 23 is provided with a second clamping hole 42 corresponding to the first clamping hole 41, and the two second clamping holes 42 on the two connecting plates 23 on the same side of the sliding bin 2 in the width direction are coaxially arranged.

Referring to fig. 6 and 7, the first engaging hole 41 and the two corresponding second engaging holes 42 are commonly connected to a limiting rod 43 in a penetrating manner, the limiting rod 43 is coaxially disposed with the first engaging hole 41, and the limiting rod 43 is used for limiting the relative sliding between the sliding bin 2 and the fixed bin 1. The one end fixedly connected with fixed block of gag lever post 43, the fixed block butt in one of them lateral wall of 1 length direction in fixed storehouse, the connecting hole has been seted up on the other end lateral wall of gag lever post 43, fixedly connected with locating part in the connecting hole, the locating part is jackscrew 44 in this embodiment, jackscrew 44 is including the bushing part that is provided with the external screw thread, bushing part holds in the connecting hole completely, there is the ball portion through compression spring elastic connection in the bushing part, bushing part axis reciprocating motion can be followed to the ball portion, the ball head of ball portion can stretch out bushing part and can impress bushing part completely. The round ball part of the jackscrew 44 abuts against the other outer side wall of the fixed bin 1 in the length direction and is used for limiting the movement of the limiting rod 43 along the axial direction.

Be provided with guiding mechanism 3 between sliding bin 2 and the fixed storehouse 1, guiding mechanism 3 is including offering the guide way 31 in the middle of four lateral walls in fixed storehouse 1 inner chamber, and guide way 31 runs through the open end terminal surface of fixed storehouse 1, and guide way 31 extends to protruding 122 department from the open end of fixed storehouse 1 to the blind end of fixed storehouse 1. The guide mechanism 3 further comprises four guide blocks 32 respectively positioned on four outer side walls of the sliding bin 2, the guide blocks 32 are in one-to-one correspondence with the guide grooves 31, one end of each guide block 32 extends out of the end face, facing the fixed bin 1, of the sliding bin 2, and a rectangular notch 321 for reducing weight is formed in each guide block 32. When one end of the sliding bin 2 is inserted into the opening end of the fixed bin 1, the guide block 32 is inserted into the guide groove 31, and the sliding bin 2 is guided.

Referring to fig. 8, an unmanned aerial vehicle, on fixed storehouse 1 was fixed in unmanned aerial vehicle's fuselage 6 through triangular supports 14, the both sides of unmanned aerial vehicle's fuselage 6 were provided with two fixed storehouses 1 respectively at the interval, and the fixed storehouse 1 symmetry in fuselage 6 both sides sets up. Triangular supports 14 set up to right triangle plate body, and a right angle terminal surface on the triangular supports 14 passes through bolt fixed connection with the blind end terminal surface in fixed storehouse 1, and the inclined plane of triangular supports 14 uses bolt-up to connect on unmanned aerial vehicle's fuselage 6, and 14 interval parallel arrangement of triangular supports have two.

The implementation principle of the above embodiment is as follows:

when ammunition needs to be launched, the sliding bin 2 moves towards the opening end of the fixed bin 1 and is inserted into the fixed bin 1, the connecting plate 23 penetrates through a gap between the outer side wall of the fixed frame 12 and the inner side wall of the fixed bin 1 until the end face, back to the sliding bin 2, of the connecting plate 23 abuts against the end face of the inner side of the closed end of the fixed bin 1, the limiting rod 43 sequentially penetrates through the first clamping hole 41 and the second clamping hole 42, the limiting nut is screwed to limit the movement of the limiting rod 43 along the axial direction of the limiting rod, the limiting rod 43 limits the relative sliding between the sliding bin 2 and the fixed bin 1, and the detachable connection between the sliding bin 2 and the fixed bin 1 is realized; in the process that the sliding bin 2 is inserted into the fixed bin 1, the guide block 32 is inserted into the guide groove 31 in a sliding mode, and the guide function is achieved for the insertion of the sliding bin 2; after the fixed bin 1 is fixedly connected with the sliding bin 2, the ignition device transmits a signal to the launching device 5, and ammunition is ignited and launched;

when ammunition does not need to be launched, the round ball part of the jackscrew 44 is pressed, the limiting rod 43 is pulled out, the sliding bin 2 slides out of the fixed bin 1 along the track direction of the guide groove 31, the ignition device is separated from the launching device 5, the condition that ammunition is launched due to misoperation is reduced, and the safety of the ammunition launching bin is improved.

Example two

Referring to fig. 9, an unmanned aerial vehicle, the difference with embodiment one lies in that the fuselage 6 internal fixation is connected with rather than the enhancement storehouse 7 of looks adaptation, strengthens storehouse 7 and sets up to hollow frame construction in inner chamber. Strengthen the backup pad 71 that two intervals set up of fixedly connected with in the storehouse 7, two backup pads 71 will strengthen storehouse 7 inside and divide into three independent space and have played further reinforcing effect to strengthening storehouse 7. Strengthen setting up of storehouse 7 and increased unmanned aerial vehicle's fuselage 6's structural strength, the damage that the reaction force when having reduced the ammunition transmission caused fuselage 6.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. An ammunition firing chamber, comprising: the ammunition loading device comprises a fixed bin (1), wherein one end of the fixed bin (1) is opened, a sliding bin (2) is inserted into the open end of the fixed bin (1) in a sliding mode, the sliding bin (2) is used for loading ammunition, and a limiting rod (43) used for limiting relative sliding between the sliding bin (2) and the fixed bin (1) is arranged between the sliding bin (2) and the fixed bin (1);

the part of the sliding bin (2) extending into the fixed bin (1) is fixedly provided with a launching device (5), an ignition trigger assembly (13) is fixedly arranged in the fixed bin (1), and the ignition trigger assembly (13) is used for starting the launching device (5).

2. An ammunition firing chamber according to claim 1 wherein: the limiting rod (43) is positioned on one side of the ignition trigger assembly (13) back to the opening end of the fixed bin (1).

3. An ammunition firing chamber according to claim 1 wherein: a fixed frame (12) is fixedly arranged in the fixed bin (1), the fixed frame (12) is fixedly connected with the ignition trigger assembly (13), a connecting plate (23) is fixedly arranged on the sliding bin (2), the connecting plate (23) can penetrate through the fixed frame (12), and the limiting rod (43) penetrates through the fixed bin (1) and the connecting plate (23) along the direction perpendicular to the sliding direction of the sliding bin (2) and penetrates through the part of the fixed frame (12);

the limiting piece used for limiting the relative movement between the limiting rod (43) and the fixed bin (1) is arranged on the limiting rod (43).

4. An ammunition firing chamber according to claim 3 wherein: the limiting piece is a jackscrew (44); the side surface of the limiting rod (43) is provided with a connecting hole, the connecting hole is positioned at the part of the limiting rod (43) penetrating through the fixed bin (1), the limiting rod (43) is connected with the jackscrew (44) in the connecting hole in a threaded manner, and the ball head of the jackscrew (44) extends out of the connecting hole and can be completely pressed into the connecting hole.

5. An ammunition firing chamber according to claim 1 wherein: a guide mechanism (3) is arranged between the fixed bin (1) and the sliding bin (2).

6. An ammunition firing chamber according to claim 5 wherein: the guide mechanism (3) comprises a guide groove (31) arranged in the fixed bin (1); the guide mechanism (3) also comprises a guide block (32) fixedly arranged on the sliding bin (2); the guide groove (31) is used for guiding the guide block (32) to move.

7. An ammunition firing chamber according to claim 1 wherein: and a reinforcing frame (22) is fixedly arranged on the outer side of the sliding bin (2).

8. An unmanned aerial vehicle, its characterized in that: an ammunition shooting bin comprising an ammunition shooting bin as claimed in any one of claims 1 to 7, wherein the ammunition shooting bin comprises a fuselage (6), a plurality of fixed bins (1) are arranged, and the fixed bins (1) are symmetrically fixed on the fuselage (6) of the unmanned aerial vehicle along the wingspan direction of the unmanned aerial vehicle.

9. A drone according to claim 8, characterised in that: the fixed bin (1) and the machine body (6) are fixedly connected with a triangular support (14), and the triangular support (14) is used for reducing the damage of the reaction force generated by ammunition launching to the machine body (6).

10. A drone according to claim 8, characterised in that: and a reinforcing bin (7) for reinforcing the machine body (6) is fixedly arranged on the machine body.

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