CN114279264A - Pneumatic type stone throwing machine - Google Patents

Abstract

The application discloses a pneumatic stone throwing machine which comprises a support frame, a throwing mechanism and a pneumatic mechanism, wherein the throwing mechanism comprises a launching rod hinged on the support frame, and a tray is detachably connected to the first surface of the launching rod; wherein, the top surface at first face for following launching rod length direction place on the launching rod, pneumatic mechanism is including articulating the cylinder on the support frame, is provided with the piston rod in the cylinder, and the one end of piston rod stretches out the cylinder and articulates in launching rod bottom, encloses into pneumatic chamber in the cylinder and between the piston rod, and pneumatic intracavity can input external gas, and this application has applicable in high temperature or low temperature area, not influenced by the environment, and convenient operation swift advantage.

Description

Pneumatic type stone throwing machine

Technical Field

The application relates to the technical field of stone throwers, in particular to a pneumatic stone thrower.

Background

The common stone thrower adopts gravity as a power source, increases the acceleration distance of stones by increasing the rotation radius, thereby obtaining great acceleration, but has great human power consumption and inconvenient operation, some stone throwers use power sources such as elastic power sources of springs, rubber bands and the like, but the elastic power sources are easily influenced by the environmental temperature, the humidity, the air salinity and the like, the common springs exceed 60 ℃, the elastic modulus begins to change, and the common springs are fragile and easy to damage when meeting the low-temperature environment, so that the stone thrower can possibly meet severe cold of minus 30 ℃ and extremely high temperature for special scenes such as high-temperature tropical regions or low-temperature mountain regions and the like, and therefore, the stone thrower can not be suitable when being easily influenced by the extreme environment.

Disclosure of Invention

The utility model provides a main aim at provides a pneumatic type machine of throwing stone, aims at solving the easy extreme environment influence and the relatively poor technical problem of suitability of the machine of throwing stone of current elasticity power supply.

In order to achieve the purpose, the pneumatic stone thrower comprises a support frame, a projection mechanism and a pneumatic mechanism, wherein the projection mechanism comprises a projection rod hinged on the support frame, and a tray is detachably connected to the first surface of the projection rod; the first surface is a top surface of the launching rod along the length direction of the launching rod; the pneumatic mechanism comprises a cylinder barrel hinged on the support frame, a piston rod is arranged in the cylinder barrel, one end of the piston rod extends out of the cylinder barrel and is hinged at the bottom of the launching rod, and a pneumatic cavity is enclosed between the interior of the cylinder barrel and the piston rod.

Optionally, the device further comprises a resetting mechanism, the resetting mechanism comprises a first pulley block detachably connected to the bottom of the launching rod, a second pulley block is arranged at the bottom of the supporting frame, and a pull rope is wound between the first pulley block and the second pulley block.

Optionally, the first pulley block comprises a hook, the bottom of the launcher rod is provided with a hook matched with the hook, the hook is connected with a pulley yoke, the pulley yoke is provided with a guide pulley, and the second pulley block has the same structure as the first pulley block.

Optionally, the support frame includes two sets of scissor brackets, a first movable shaft is movably connected between the intersections of the two sets of scissor brackets, a second movable shaft is movably connected between the tops of the two sets of scissor brackets located on the same side, the launching rod is hinged on the second movable shaft, a third movable shaft is also movably connected between the two sets of scissor brackets, and the cylinder is hinged on the third movable shaft.

Optionally, the tops of the two groups of fork frames are hinged to form a frame, the projection mechanism is located in the frame, a first locking mechanism is arranged at one end, away from the second movable shaft, of the frame, a second locking mechanism is arranged at one end, away from the second movable shaft, of the launching rod, and the second locking mechanism is used for being matched with the first locking mechanism for locking.

Optionally, the first locking mechanism includes a suspension bracket arranged at the bottom of the frame, a locking sleeve is arranged at the bottom of the suspension bracket, the second locking mechanism includes a guide sleeve connected with the launching rod, a self-locking rod is movably arranged in the guide sleeve, the self-locking rod can extend into the locking sleeve, a limiting boss is arranged on the self-locking rod, a compression spring between the limiting boss and the launching rod is sleeved on the self-locking rod, and one end of the self-locking rod extending out of the guide sleeve is a spherical end.

Optionally, the suspension bracket is provided with an unlocking mechanism, the unlocking mechanism comprises a push rod movably extending into the locking sleeve and capable of contacting with the self-locking rod, one end of the push rod, which is located outside the locking sleeve, is hinged with a lever, the suspension bracket is provided with a support seat located above the push rod, and the lever is hinged on the support seat.

Optionally, the telescopic fork further comprises a base, four groups of supporting seats are detachably arranged on the base, the bottoms of the two groups of fork shearing frames are hinged to the corresponding supporting seats, two groups of guide rails are arranged on the base, and the supporting seats can slide along the corresponding guide rails.

Optionally, the base bottom is provided with the multiunit fixed establishment, and fixed establishment is provided with the ground nail including connecting the support in the base bottom, support bottom.

Optionally, the base is provided with a plurality of through holes.

The beneficial effect that this application can realize is as follows:

the pneumatic mechanism is used as a power source of the projection mechanism, external gas is input into a pneumatic cavity of the cylinder barrel to drive the piston rod to stretch out instantaneously, so that the emission rod is driven to rotate quickly to drive stones on the tray to be projected, the pneumatic mechanism is mainly driven by the gas power source, and therefore when the pneumatic mechanism is used in places such as mountainous areas where electricity cannot be used, the pneumatic mechanism is not easily affected by environment temperature, humidity, air salinity and the like and can be normally used in extreme environments, and tests prove that the pneumatic mechanism can normally work under the conditions of-40 ℃ to 80 ℃, temperature conditions of all areas from north to south in China are met, the pneumatic mechanism can also normally work under the conditions of high salt spray and high humidity, special operation environments such as seaside and deep mountains are met, and the application range is wide.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings that are needed in the detailed description of the present application or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of a pneumatic rock-throwing machine according to an embodiment of the present application;

FIG. 2 is a schematic view of a pneumatic rock-dropping machine according to another embodiment of the present disclosure;

FIG. 3 is a schematic view of a pneumatic rock thrower in a projecting state according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a pneumatic rock-throwing machine in a folded state according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a pneumatic mechanism in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a first pulley block in an embodiment of the present application;

FIG. 7 is a schematic view of a connection of a first locking mechanism, a second locking mechanism and an unlocking mechanism in an embodiment of the present application;

FIG. 8 is a schematic cross-sectional view of a first locking mechanism, a second locking mechanism and a push rod connection in an embodiment of the present application;

FIG. 9 is a schematic view of a stone throwing parabola;

fig. 10 is a schematic structural view of a conventional gravity source stone thrower.

Reference numerals:

110-support frame, 111-scissor frame, 112-first movable shaft, 113-second movable shaft, 114-third movable shaft, 115-frame, 120-projection mechanism, 121-launching rod, 122-tray, 130-pneumatic mechanism, 131-cylinder, 132-piston rod, 133-pneumatic chamber, 134-piston block, 135-guide seat, 136-oil seal, 137-limit sleeve, 138-sealing ring, 140-reset mechanism, 141-first pulley block, 1411-hanging buckle, 1412-pulley frame, 1413-guide pulley, 142-second pulley block, 143-pull rope, 150-hook, 160-first locking mechanism, 161-suspension frame, 162-locking sleeve, 170-second locking mechanism, 171-guide sleeve, 172-self-locking rod, 173-limit boss, 174-compression spring, 180-unlocking mechanism, 181-push rod, 182-lever, 183-support, 190-base, 191-through hole, 210-support, 220-guide rail, 230-fixing mechanism, 231-support and 232-ground nail.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that all the directional indications (such as up, down, left, right, front, and back … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

Examples

Referring to fig. 1 to 8, the present embodiment provides a pneumatic type stone projector, including a support frame 110, a projection mechanism 120 and a pneumatic mechanism 130, wherein the projection mechanism 120 includes a launching rod 121 hinged on the support frame 110, and a tray 122 is detachably connected to a first surface of the launching rod 121; wherein, the first surface is a top surface of the firing rod 121 along the length direction of the firing rod 121; the pneumatic mechanism 130 comprises a cylinder 131 hinged on the support frame 110, a piston rod 132 is arranged in the cylinder 131, one end of the piston rod 132 extends out of the cylinder 131 and is hinged at the bottom of the firing rod 121, a pneumatic cavity 133 is defined between the inside of the cylinder 131 and the piston rod 132, and outside air can be input into the pneumatic cavity 133.

In this embodiment, the pneumatic mechanism 130 is used as a power source of the projection mechanism 120, and external air is input into the pneumatic cavity 133 of the cylinder 131 to drive the piston rod 132 to instantly extend out, so as to drive the emission rod 121 to rapidly rotate to drive the stones on the tray 122 to be ejected out, wherein the pneumatic mechanism 130 is mainly driven by a gas power source, which is stable, so that when the device is used in mountainous areas where electricity cannot be used, the device is not easily affected by ambient temperature, humidity, air salinity and the like, and can be normally used in extreme environments.

It should be noted that, the bottom of the tray 122 is provided with a mounting hole, the tray 122 can be fixed at different positions of the launching rod 121 through the mounting hole corresponding to the matched screw, so as to realize detachable connection, thereby adjusting different launching distances, the cylinder 131 is connected with the inflating device (not shown in the figure) through the air pipe, an instantaneous explosive force can be provided to the piston rod 132 by manually pressing the inflating device, and the manpower consumption is low. On the basis, the pneumatic mechanism 130 further comprises a piston block 134 capable of sliding along the inner wall of the cylinder 131, the piston block 134 is connected with the piston rod 132, a guide seat 135 movably sleeved on the piston rod 132, an oil seal 136, a limiting sleeve 137 and a sealing ring 138 are sequentially arranged inside the cylinder 131, the sealing ring 138 is in contact with the piston block 134, and the guide seat 135 is located at the end of the cylinder 131.

As an optional embodiment, the device further comprises a reset mechanism 140, wherein the reset mechanism 140 comprises a first pulley block 141 detachably connected to the bottom of the firing rod 121, a second pulley block 142 is arranged at the bottom of the supporting frame 110, and a pull rope 143 is wound between the first pulley block 141 and the second pulley block 142.

Because in order to adapt to no electric service environment, the special gas power source that adopts, input gas in cylinder 131 through the manpower during the stone is thrown, after the use, can't make piston rod 132 shrink into cylinder 131 through electric control in order to make launching rod 121 reset, consequently still need use in addition the canceling release mechanical system 140 of manpower control in order to drive launching rod 121 rotation and reset, consequently in this embodiment, after the use, can install first assembly pulley 141 toward launching rod 121 corresponds the position, then adopt many stay cords 143 to bypass first assembly pulley 141 and second assembly pulley 142 simultaneously and pull out from one end, pull rope 143 in order to pull launching rod 121 down to the horizontality through the manpower, piston rod 132 also automatic retraction is into cylinder 131 at this moment, realize the manpower and reset.

It should be noted that, here, the pulling rope 143 is wound around the first pulley block 141 and the second pulley block 142 to form a labor-saving structure, which facilitates pulling down the shooting rod 121. When the projectile is needed, the first pulley block 141 needs to be detached from the launching rod 121.

As an alternative embodiment, the first pulley block 141 includes a hanging buckle 1411, the bottom of the launching rod 121 is provided with a hook 150 which is matched with the hanging buckle 1411, the hanging buckle 1411 is connected with a pulley frame 1412, the pulley frame 1412 is provided with a guiding pulley 1413, and the second pulley block 142 has the same structure as the first pulley block 141.

In this embodiment, when the first pulley block 141 is installed on the bottom of the launching rod 121, the hanging buckle 1411 can be directly hung on the hook 150, the hanging buckle 1411 can be similar to a key ring structure and can be firmly hung, the plurality of sets of guide pulleys 1413 can be adopted, and the guide pulleys 1413 can be fixed or movable.

As an alternative embodiment, the supporting frame 110 includes two sets of fork shearing frames 111, a first movable shaft 112 is movably connected between the intersections of the two sets of fork shearing frames 111, a second movable shaft 113 is movably connected between the tops of the two sets of fork shearing frames 111 located on the same side, the launching rod 121 is hinged on the second movable shaft 113, a third movable shaft 114 is also movably connected between the two sets of fork shearing frames 111, and the cylinder 131 is hinged on the third movable shaft 114.

In this embodiment, the two fork frames 111 are hinged and can rotate and fold around the first movable shaft 112, so as to fold and fold the whole support frame 110, and when not in use, the support frame can be conveniently folded together without occupying space, thereby facilitating transportation and storage. It should be noted that the piston rod 132 and the firing rod 121 can be connected by a bolt to form a detachable connection structure, and the piston rod 132 is detached from the firing rod 121 during folding, so as to further improve the folding degree.

As an alternative embodiment, the top of the two fork sets 111 is hinged with a frame 115, the projection mechanism 120 is located in the frame 115, one end of the frame 115 away from the second movable shaft 113 is provided with a first locking mechanism 160, one end of the firing rod 121 away from the second movable shaft 113 is provided with a second locking mechanism 170, and the second locking mechanism 170 is used for being matched and locked with the first locking mechanism 160.

In the present embodiment, when not in use, one end of the launching rod 121 can be locked on the first locking mechanism 160 of the frame 115 through the second locking mechanism 170 to support the launching rod 121, so as to avoid the large bearing pressure of the pneumatic mechanism 130 caused by supporting the launching rod 121 completely through the pneumatic mechanism 130, reduce the burden of the pneumatic mechanism 130, and prolong the service life of the pneumatic mechanism 130.

As an alternative embodiment, the first locking mechanism 160 includes a suspension frame 161 disposed at the bottom of the frame 115, a locking sleeve 162 is disposed at the bottom of the suspension frame 161, the second locking mechanism 170 includes a guide sleeve 171 connected to the firing rod 121, a self-locking rod 172 is movably disposed in the guide sleeve 171, the self-locking rod 172 may extend into the locking sleeve 162, a limiting boss 173 is disposed on the self-locking rod 172, a compression spring 174 located between the limiting boss 173 and the firing rod 121 is sleeved on the self-locking rod 172, and an end of the self-locking rod 172 extending out of the guide sleeve 171 is a spherical end.

In this embodiment, during the locking operation, the transmitting rod 121 is rotated downward, so that the end of the transmitting rod 121 contacts with the locking sleeve 162 from the spherical end of the locking rod 172, and the locking rod 172 is squeezed to retract into the guide sleeve 171, and the spherical end of the locking rod 172 automatically slides into the locking sleeve 162 due to the transition action of the spherical end, so that the compression spring 174 drives the locking rod 172 to automatically extend into the locking sleeve 162, thereby achieving the automatic locking function, and the operation is convenient and fast.

As an alternative embodiment, the hanging frame 161 is provided with an unlocking mechanism 180, the unlocking mechanism 180 includes a push rod 181 movably extending into the locking sleeve 162 and capable of contacting with the self-locking rod 172, one end of the push rod 181 located outside the locking sleeve 162 is hinged to a lever 182, the hanging frame 161 is provided with a support 183 located above the push rod 181, and the lever 182 is hinged to the support 183.

In this embodiment, when the locking device needs to be used, the unlocking mechanism 180 can be used to unlock the first locking mechanism 160 and the second locking mechanism 170, and during specific operation, the lever 182 is pulled outwards to drive the push rod 181 to slide towards the locking sleeve 162 until the self-locking rod 172 is pushed out of the locking sleeve 162, so that the connection between the second locking mechanism 170 and the locking sleeve 162 can be quickly disconnected, and the locking of the launching rod 121 can be unlocked.

As an optional implementation manner, the cutting tool further comprises a base 190, four groups of supporting seats 210 are detachably arranged on the base 190, the bottoms of two groups of fork shearing frames 111 are hinged to the corresponding supporting seats 210, two groups of guide rails 220 are arranged on the base 190, the supporting seats 210 can slide along the corresponding guide rails 220, and two groups of supporting seats 210 are correspondingly arranged on each guide rail 220.

In this embodiment, the base 190 is used to be fixed on the ground, the supporting seat 210 can be detachably connected to the base 190 by bolts, and the extending height of the fork frame 111 can be adjusted by adjusting different installation distances of the supporting seat 210 on the base 190, so as to adjust the projection height of the projection mechanism 120, so that the use is flexible, when the folding is required, the supporting seat 210 is detached to release the fixing function of the supporting seat 210 on the base 190, and then the supporting seat 210 slides along the corresponding guide rails 220 to both sides until the fork frame 111 is completely folded.

As an alternative embodiment, a plurality of sets of fixing mechanisms 230 are arranged at the bottom of the base 190, the fixing mechanisms 230 comprise brackets 231 connected to the bottom of the base 190, ground nails 232 are arranged at the bottoms of the brackets 231, and the ground nails 232 are used for nailing into the ground, so that the fixing effect of the whole stone thrower on the ground is improved through the fixing mechanisms 230.

As an optional implementation mode, a plurality of through holes 191 are formed in the base 190, when the base 190 is fixed on the ground, part of obstacles such as sand stones can pass through the through holes 191, and the flatness and the fitting degree of the base 190 fixed on the ground are guaranteed.

In application, the device can be used as a physical experiment simulation device for teaching, and can also be used as special scenes such as mountainous areas, frontier defense and the like.

In summary, the present application has the following advantages:

(1) using special power source instead of manpower

When the stone needs to be thrown, the stone takes a parabola as a motion track due to small air resistance, as shown in fig. 9, wherein the exit angle θ and the exit force magnitude F1 are main factors influencing the exit distance of the stone, and when the air resistance is not considered, the closer θ is to 45 °, the farther the exit distance is, the larger F1 is, the farther the exit distance is. If people throw the stones by hands, the emergent angle theta is generally between 80 degrees and 90 degrees, most of work done by people is used for improving the emergent horizontal speed, the vertical direction speed is very small, so the total flying time of the stones is reduced, the flying distance of the stones is not far, if the throwing manpower is not great, F1 is also small, the thrown stones can fly for only ten meters, and only one stone can be thrown by manpower at the same time, if a plurality of stones are thrown at the same time, the force is not uniform, the falling point is influenced, and after people throw the stones for a plurality of times, the force is also small, and the throwing distance is influenced.

And this application adopts special power supply (pneumatic source promptly), can adjust the exit angle wantonly, makes the exit angle infinitely close 45, reaches farther exit distance (50 ~100 meters), and F1 can not change because of what of stone when this application throws the stone, and the placement is stable, can throw several stone simultaneously (total weight about 1.25 kg) and accurate target of hitting to the power supply is stable, can launch many times.

(2) Adjustable special power source to meet different gear

As shown in fig. 10, the existing gravity source stone thrower adopts gravity as a power source, and increases the acceleration distance of stones by increasing the rotation radius, thereby obtaining a great acceleration, and the emergent speed is adjusted, but only the emergent angle of the limiting adjusting lever can be passed through, however, the emitting distance can not be accurately adjusted, and a plurality of tests are needed after each adjustment, if the soldier combat efficiency is greatly affected in frontier combat, and moreover, the limiting structure is arranged at the emergent position, so that the stone thrower is easily damaged due to the huge impact force.

And this application adopts controllable special power supply, consequently can set up corresponding scale on giving the gaseous inflating device of cylinder 131 input, and input power supply size only needs adjust according to the scale, the emergence distance of adjustment product that can be accurate, the emergence distance of adjustment product fast again accurate again.

(3) The oil-gas mixed power source meets the explosive power requirement

When the stone throwing motion is carried out, not only the initial power F1 is required to be large enough, but also the power source needs to explode fast, namely the emergence angular velocity of the power source can reach the angular velocity required by the product, therefore, the pneumatic mechanism 130 in the present application adopts the working principle of air cylinder, and can arrange lubricating oil on the inner wall of the cylinder tube 131 to reduce the friction force of the piston block 134, namely, an oil-gas mixed power source is adopted, compared with a common hydraulic power source, the gas power source has higher transmission speed and stronger explosive force, the emergent angular speed of the product is increased, the oil-gas mixed power source can increase the total pressure of the product to F1 while increasing the explosive force, the explosive force (angular velocity) of the product is increased, the total pressure F1 of the product is ensured, and the combination of the two items ensures that the initial emergent velocity of the product can reach 31m/s, so that the emergent distance reaches 100 m.

(4) The power source can be used in extreme environment

When the stone thrower is used in mountainous areas and other places for war, electricity and the like cannot be used, the power sources used by the ordinary stone thrower, such as springs, rubber bands and other elastic power sources, are very easily influenced by the environmental temperature, the humidity, the air salinity and the like, the elastic modulus of the ordinary springs is changed when the ordinary springs exceed 60 ℃, and the ordinary springs become fragile and easy to damage when the ordinary springs meet low-temperature environments. When the using environment is in a high-temperature tropical region or a low-temperature mountain region, severe cold of-30 ℃ and extremely high temperature can be met. The special gas power source used in the application can bear the high temperature of 80 ℃ and the low temperature of-40 ℃, and meanwhile, the gas power source can work under the conditions of high salt fog and high humidity, so that all use conditions are basically covered.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims (10)

1. A pneumatic rock-throwing machine, comprising:

a support frame;

the projection mechanism comprises a launching rod hinged on the supporting frame, and a tray is detachably connected to the first surface of the launching rod; the first surface is a top surface of the launching rod along the length direction of the launching rod;

the pneumatic mechanism comprises a cylinder barrel hinged to the support frame, a piston rod is arranged in the cylinder barrel, one end of the piston rod extends out of the cylinder barrel and is hinged to the bottom of the emission rod, and a pneumatic cavity is formed between the interior of the cylinder barrel and the piston rod.

2. The pneumatic type stone throwing machine of claim 1, further comprising a resetting mechanism, wherein the resetting mechanism comprises a first pulley block detachably connected to the bottom of the launching rod, a second pulley block is arranged at the bottom of the supporting frame, and a pull rope is wound between the first pulley block and the second pulley block.

3. The pneumatic stone thrower of claim 2, wherein the first pulley block comprises a hook, the bottom of the firing rod is provided with a hook matched with the hook, the hook is connected with a pulley frame, the pulley frame is provided with a guide pulley, and the second pulley block has the same structure as the first pulley block.

4. The pneumatic type stone thrower of claim 1, wherein the support frame comprises two sets of fork arms, a first movable shaft is movably connected between the intersections of the two sets of fork arms, a second movable shaft is movably connected between the tops of the two sets of fork arms on the same side, the firing rod is hinged to the second movable shaft, a third movable shaft is movably connected between the two sets of fork arms, and the cylinder is hinged to the third movable shaft.

5. The pneumatic stone thrower of claim 4, wherein the top of the two sets of fork arms are hinged to a frame, the throwing mechanism is located in the frame, a first locking mechanism is arranged at one end of the frame away from the second movable shaft, and a second locking mechanism is arranged at one end of the firing rod away from the second movable shaft, and the second locking mechanism is used for being matched and locked with the first locking mechanism.

6. The pneumatic stone throwing machine according to claim 5, wherein the first locking mechanism comprises a suspension bracket arranged at the bottom of the frame, a locking sleeve is arranged at the bottom of the suspension bracket, the second locking mechanism comprises a guide sleeve connected with the launching rod, a self-locking rod is movably arranged in the guide sleeve and can extend into the locking sleeve, a limiting boss is arranged on the self-locking rod, a compression spring positioned between the limiting boss and the launching rod is sleeved on the self-locking rod, and one end of the self-locking rod extending out of the guide sleeve is a spherical end.

7. The pneumatic stone throwing machine according to claim 6, wherein the suspension frame is provided with an unlocking mechanism, the unlocking mechanism comprises a push rod movably extending into the locking sleeve and capable of contacting with the self-locking rod, one end of the push rod, which is positioned outside the locking sleeve, is hinged with a lever, the suspension frame is provided with a support seat positioned above the push rod, and the lever is hinged on the support seat.

8. The pneumatic stone thrower of claim 5, further comprising a base, wherein four sets of supporting seats are detachably disposed on the base, two sets of fork carriages are hinged to the corresponding supporting seats, two sets of slide guides are disposed on the base, and the supporting seats can slide along the corresponding slide guides.

9. The pneumatic type stone throwing machine of claim 8, wherein a plurality of sets of fixing mechanisms are arranged at the bottom of the base, each fixing mechanism comprises a support connected to the bottom of the base, and ground nails are arranged at the bottom of the support.

10. The pneumatic stone thrower of claim 8 or 9, wherein the base is provided with a plurality of through holes.

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