154 results about "Pneumatic tool" patented technology

The utility model relates to a disassembly and assembly clamp for disassembly and assembly of a bogie bolster spring wedge, which comprises an electromagnetic iron core, a coil winding, a pneumatic tool, a pen-shaped cylinder and a clamp supporting seat, the electromagnetic iron core is fixedly arranged on the clamp supporting seat, the pneumatic tool is fixedly arranged on the electromagnetic iron core, the pen-shaped air cylinder is fixedly arranged on the clamp supporting seat, and the pen-shaped air cylinder is connected with an air cylinder ejector pin in the pneumatic tool. The pneumatic ejector pin is controlled to reciprocate by adjusting the air pressure of the pen-shaped air cylinder, so that the pneumatic ejector pin penetrates through the electromagnetic iron core to abut against the inner pillow spring; a coil winding is arranged outside the electromagnetic iron core and can attract the outer pillow spring. The assembling and disassembling clamp adopts the combination form of the electromagnet and the pen-shaped air cylinder, the automatic assembling and disassembling operation of the pillow springs and the wedges of the k2 and K6 bogies is facilitated, the structure is simple, the installation and the maintenance are convenient, and the clamp form is also suitable for the automatic assembling and disassembling operation of the pillow springs and the wedges of the k4 and K5 bogies.

The utility model discloses a pneumatic tool changing type electric spindle with a spindle and a tool sharing a cooling water path. A coil fixing seat is fixedly installed in an external shaft shell, a plurality of water channels are arranged along the periphery of the external shaft shell, the plurality of communicated water channels are formed in a space defined by the external shaft shell and the coil fixing seat, and the water channel at the rearmost end is connected with an external cooling water tank with pressure through a water channel connector elbow installed at the rear end of the external shaft shell. At least one spray head fixing seat is arranged at the front end of the external shaft shell, and a cooling water spray head mounted in the spray head fixing seat is communicated with the forefront water channel in the water channels through a spray head water supply channel; the coil stator is fixed in the coil fixing seat and corresponds to the rotor in position, and the rotor is fixed outside the middle shaft head of the hollow rotating shaft through the rotor fixing sleeve. According to the utility model, only one cooling water tank is needed to cool the main shaft and the cutter at the same time, no additional cutter cooling device is needed, the maintenance is more convenient, and the cost is saved.

The utility model discloses a generator set damping installation structure which comprises a damping support and an installation plate installed on the lower side of a generator, the side, away from the generator, of the installation plate is bent upwards to form a first side plate, and a locking bolt used for locking the installation plate and the support transversely penetrates through the first side plate. The first side plate is arranged on the side, away from the generator, of the mounting plate, and the locking bolt transversely penetrates into the mounting plate to lock the mounting plate and the damping support, so that the screwing end of the locking bolt faces outwards, a pneumatic tool can be conveniently adopted for locking, the mounting efficiency can be improved, the fastening performance is better when the pneumatic tool is adopted for locking, and the service life of the mounting plate is prolonged. And the connection is firmer.

A specialized tool for replacing an anchor pin bushing on a large truck or trailer is provided. The tool is a solid, cylindrical shaft designed to be driven into the anchor pin bushing by an operator using a manual hammer. The tool features a cutout segment that allows it to be maneuvered around the wheel hub assembly while driving the bushing, thus eliminating the need for a burdensome removal of the wheel hub assembly. The tool can be used to remove an old bushing and to install a new bushing into an eye of a brake frame housing. The tool may also include a removable installation sleeve, which is used to prevent a new bushing from being driven in too far. An alternate embodiment describes the specialized tool in a format designed to be driven by standard pneumatic air tools.

A pneumatic tool for assembling all-welded ball valves comprises a rack, a first bearing seat is fixedly arranged on the rack, a first rotating clamping jaw is arranged in the first bearing seat, a positioning hole is formed in the end face of the first rotating clamping jaw, and a linear guide rail is arranged on the portion, on one side of the first bearing seat, of the rack. The linear guide rail is connected with a second bearing seat through a sliding block, a second rotating clamping jaw is arranged in the second bearing seat, an air cylinder is arranged on the machine frame, a piston rod of the air cylinder is connected with the second bearing seat, and the air cylinder is connected with an air source through an air pipe, a pneumatic valve and a precise pressure reducing valve. The first rotating clamping jaw and the second rotating clamping jaw are used for clamping the all-welded ball valve to be assembled, the air cylinder drives the second rotating clamping jaw to move, the second rotating clamping jaw and the first rotating clamping jaw press the all-welded ball valve to be assembled, the input pressure of compressed air of the air cylinder can be set through the precise pressure reducing valve according to the caliber and pressure of the valve, and the output force of the air cylinder is kept stable; and after the valve is welded and assembled, the yield is extremely high, and the production efficiency of the valve is improved.

A pneumatic tool for assembling or disassembling a ball body of a top-mounted ball valve comprises a base and a first guide rail on the base, two first sliding blocks are arranged on the first guide rail, clamping devices are arranged on the two first sliding blocks respectively, each clamping device comprises a main support, the main support is arranged on the first sliding blocks, a stretching air cylinder and a second guide rail are arranged on the main support, and the stretching air cylinder is arranged on the second guide rail. The second guide rail is connected with a dragging support through a second sliding block, a piston rod of the stretching air cylinder is connected with the dragging support, a clamping air cylinder is arranged on the dragging support, swing clamping jaws are hinged to the two sides of the dragging support respectively, a piston rod of the clamping air cylinder is connected with a driving head, and one ends of connecting rods are hinged to the two sides of the driving head respectively. The other end of the connecting rod is connected with the swing clamping jaw. After the clamping air cylinder clamps in place, the stretching air cylinder drives the inlet valve seat and the outlet valve seat to overcome spring force to move along the second guide rail and reach the outermost side position by dragging the support and swinging the clamping jaw, the assembled ball is placed into the valve body, and the installation efficiency of the valve is improved.

The utility model provides a raised head rivet disassembling auxiliary device which comprises a guide sleeve (1), a drill rod (2), a first bearing (3), a drill rod spring (4), a second bearing (5), a four-claw sliding block (6), a sliding block spring (7) and a drill bit (8), the guide sleeve (1) is in a barrel shape, a straight hole is formed in the upper end of the barrel shape, and a step hole is formed in the lower end of the barrel shape and used for installing the second bearing (5), the drill rod (2), the drill rod spring (4) and the first bearing (3); four sliding grooves are formed in the outer surface of the lower end of the barrel shape and used for installing a four-claw sliding block (6) and a sliding block spring (7), and the guide sleeve (1) provides an installation supporting structure for other parts. The drill rod (2) is in a round straight rod shape with a boss in the middle, the upper end of the drill rod is installed in the first bearing (3), the lower surface of the boss makes contact with the upper end of the drill rod spring (4), the lower end of the drill rod is installed in the second bearing (5), the drill rod (2) is used for transmitting power, and the upper end of the drill rod is connected with a pneumatic tool and a drill bit (8).

The utility model relates to the technical field of tool turrets, and discloses a power tool turret with a pneumatic tool changing gas circuit, which comprises a sliding block, a box body arranged at the upper end of the sliding block, a large gear arranged at the upper end of the box body, an outer gear ring arranged inside the large gear, a cutter head arranged at the upper end of the outer gear ring, and a first gas circuit arranged inside the large gear, the outer gear ring and the cutter head. According to the pneumatic tool changing device, a first air channel is formed in the outer gear ring, a second air channel is formed in the box body and the sliding block, an air channel control mechanism is arranged between the box body and the large gear, and the rapid and accurate pneumatic tool changing process is achieved through the first air channel formed in the large gear, the outer gear ring and the tool disc and the second air channel formed in the box body and the sliding block in combination with the air channel control mechanism. By means of the design, complex mechanisms and time needed by mechanical tool changing are reduced, machining efficiency and production flexibility are improved, loosening and locking of the tool on the power tool apron are controlled through an air path in the tool turret, automatic tool changing is achieved, machining efficiency is improved, and safety is also improved.

The invention relates to the technical field of drilling-dimpling combined pneumatic tool for supporting plate nuts, and particularly discloses a drilling-dimpling combined pneumatic tool for supporting plate nuts, which comprises a handle, a vent pipe hole is formed from the upper end face to the lower end face of the handle, and a working cavity is fixedly mounted at the upper end of the handle; a baffle is fixedly mounted in the working cavity, a movable baffle is slidably arranged on the left side of the interior of the working cavity, working rods are fixedly mounted on the two sides of the movable baffle, resistance cavities are fixedly mounted on the front side face and the rear side face of the working cavity, and the working rods are slidably mounted in the resistance cavities. The drilling and dimpling procedures are integrally completed, tools do not need to be frequently replaced, and the operation time is greatly shortened. Meanwhile, due to the integrated design of all the components, the consistency of tool positioning in the drilling and dimpling process is guaranteed, the coaxiality of the two working procedures is remarkably improved, the problem that the assembling precision is insufficient due to positioning deviation in traditional step-by-step operation is effectively solved, and the mounting quality and the connecting stability of the supporting plate nut are improved.

The utility model discloses an adjustable SMT template pneumatic tool clamp, and relates to the technical field of tool clamps. The device comprises a transverse frame and a longitudinal frame, a fixed adjusting mechanism is arranged on the longitudinal frame so as to fix the longitudinal frame on the top face of the transverse frame, a position adjusting mechanism is arranged on the fixed adjusting mechanism, an air cylinder is fixedly installed on the surface of the position adjusting mechanism, and a pressing assembly is fixedly installed at the free end of the air cylinder. According to the utility model, the air cylinder and the pressing assembly are enabled to move on the surface of the longitudinal frame through the position adjusting mechanism, so that the positions of the position adjusting mechanism and the pressing assembly are adjusted, the SMT template size entering adjustment can be adapted, and the position adjusting mechanism and the pressing assembly correspond to the edge of the screen frame; the air cylinder drives the pressing assembly to vertically move downwards, so that the bottom end of the pressing assembly makes contact with the top face of the screen frame, the elastic part of the pressing assembly can prevent the screen frame from being overpressed due to overlarge pressure, and the screen frame is prevented from being damaged.

The invention relates to the technical field of industrial robots, and particularly discloses an intelligent mechanical arm for a processing machine tool of an integrated pneumatic tool bit changing mechanism, which comprises a mechanical arm body and a tool apron arranged on the mechanical arm body, the mechanical arm body comprises a driving motor and a rotating shaft connected with an output shaft of the driving motor, the tool apron comprises a mounting base, a tool handle and a tool clamping assembly, the tool handle and the tool clamping assembly are arranged on the mounting base, the tool apron is detachably connected with the rotating shaft through the tool handle, and the tool clamping assembly is used for mounting an external standard tool. And a pneumatic grabbing mechanism is arranged on the rotating shaft and is used for clamping or releasing the cutter handle, so that the cutter holder can be quickly mounted on and dismounted from the mechanical arm body. The pneumatic grabbing mechanism is arranged, clamping and releasing of the cutter handle are achieved by controlling air pressure, so that rapid replacement of the cutter holder is completed, the cutter clamping assembly is used for installing standard cutters of different models, and rapid switching among different process tasks is achieved.

The utility model provides a pneumatic tool for a cutting experiment, which comprises an angle grinder which comprises an angle grinder body, a handle and a transmission mechanism extending out of the bottom of the angle grinder body; the fixing ring is arranged on the outer side of the transmission mechanism in a sleeving manner; the fixing plate is mounted below the fixing ring through the fixing ring; the cam is arranged below the fixed plate and is connected with the transmission mechanism; the cam follower, the blade mounting plate and the blade are sequentially connected with the cam; under the driving of the transmission mechanism, the cam rotates, and then the blade is driven to do reciprocating cutting motion. According to the utility model, the structure of a common pneumatic tool is modified, the interaction effect between a blade and a cut object during manual cutting of an operator is simulated, huge physical output caused by manual cutting is avoided, and even the glue separation work between the inner and outer plates of the vehicle door can be completed by only one operator; and the working efficiency is greatly improved, and the labor cost is reduced.

The invention discloses a pneumatic tool, and relates to the field of pneumatic tools. The positioning frames are mounted on the bottom plate, and the positioning frames are used for limiting the placement positions of the workpieces; the positioning assembly is mounted on the bottom plate, and the positioning assembly is used for extruding the inner wall of the workpiece to fix the position of the workpiece; and the clamping assemblies are mounted on the bottom plate. Through the parallel bidirectional symmetrical push-pull function of the first air cylinder, the first steel ball positioning screws are driven to symmetrically abut against the inner wall of the workpiece, centering positioning and preliminary pressing of the workpiece are achieved, and the positioning symmetry degree is improved. And then, the second air cylinder and the third air cylinder are used for conducting auxiliary clamping on the workpiece, so that workpiece deformation caused by the first air cylinder is counteracted, and vibration in the machining process is reduced. And finally, the workpiece is vertically pressed through four fourth air cylinders, the machining displacement is further reduced, and therefore the machining precision is improved.

A floor removal tool comprising a beveled, thin base connected to a long handle, which is used for the removal of materials adhered to a surface, commonly flooring or subflooring. The beveled base is wide to facilitate the efficient removal of large amounts of material when the ergonomic handle is pushed or pulled to leverage the adhered material up. The beveled base is also connected to a second vertical plate that has a fulcrum sill. When a suitably sized block is placed under the sill, the pivot point is raised such that there is a decreased chance of damaging the surface. The base can be easily struck by a man-powered tool or it can be connected to an air-powered tool to facilitate tool insertion under the material to be removed.

The derusting polisher comprises a barrel and a brush nail assembly, a hollow circular inner cavity is formed in the middle of the barrel, a positioning inner hole is formed in one end of the barrel in the inner hole direction, the inner hole of the positioning inner hole is smaller than the inner hole of the inner cavity, and the brush nail end of the brush nail assembly enters and penetrates through the positioning inner hole from the barrel. The plane end of the brush nail assembly is located in the inner cavity of the barrel, and a large spring is installed between the plane end of the brush nail assembly and the positioning inner hole. The device has the beneficial effects that the device size is small, rust removal, metal surface hardness strengthening, chiseling and wall skin shoveling can be carried out on any corner, an electric tool or a pneumatic tool can be used as a power source, the device cost is low, the danger of rust removal of an angle grinder in the market is avoided, and high environmental pollution caused by chemical rust removal is avoided.

The invention discloses grinding and polishing equipment for machining a new energy battery rack base. The grinding and polishing equipment comprises a bed base serving as an equipment bearing foundation and a U-shaped hanging table fixed to the top wall of the bed base. The number of the hollow rotation assemblies is two, the two hollow rotation assemblies are installed on the left side and the right side of the top end of the machine base in a mirror symmetry mode, the rotating ends, away from each other, of the two hollow rotation assemblies are each provided with a four-corner type pneumatic tool, and the four-corner type pneumatic tools are used for centering and clamping the square single-hole base from four corners. The horizontal polishing assembly moves upwards in the hollow rotating assembly in the radial direction and makes contact with the inner hole wall of the single-hole base, the rotary driving assembly enables the hollow rotating assembly, the four-corner type pneumatic tool and the single-hole base workpiece to rotate by one circle or more, and in the process, the contra-rotating synchronous driving assembly drives key shaft telescopic structures on the left side and the right side to rotate; and the key shaft telescopic structure transmits power to the horizontal polishing assembly, so that inner hole polishing treatment is completed on the single-hole base workpiece in the autorotation process.

The utility model provides a waste gas exhaust back pressure silencer which comprises a first-stage silencing assembly communicated with an exhaust port of a pneumatic tool and a second-stage silencing assembly connected to the other side of the first-stage silencing assembly. The first-stage silencing assembly comprises a connecting body and a first shell arranged on the outer side of the connecting body in a sleeving mode, a pressure return cavity is formed between the first shell and the connecting body, and a channel communicated with the exhaust port is formed in the connecting body. The second-stage silencing assembly comprises a second shell connected to the connecting body and a plurality of flow dividing bases arranged in the axial direction of the shell, and a first silencing piece is arranged in a hole between every two adjacent flow dividing bases. An inner cavity is formed in the second shell, the channel communicates with the inner cavity, and second silencing pieces are arranged on the two sides of the flow dividing base correspondingly. According to the utility model, layer-by-layer silencing is carried out through the first silencing piece, and meanwhile, the two second silencing pieces are respectively arranged at the two ends of the second shell, so that the silencing purpose is achieved, the influence of noise on the environment when the pneumatic tool exhausts is met, and the comfort level of operators and the environmental safety are improved.

1. Name of the Design Product: Pneumatic Dust Cover Replacer (240716-C). 2. Use of the Design Product: A pneumatic tool for disassembling, installing and replacing dust covers. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photo that Best Illustrates the Design Key Points: Perspective view.

The utility model discloses an automatic fixing and locking device for a hinge lining box, which relates to the technical field of screw locking and comprises a main body rack arranged on the ground side by side and a vibration feeding machine used for feeding screws in a vibration manner, and a rotary disc is mounted in the center of the upper end of the main body rack; a plurality of profiling tools matched with the hinge lining boxes are distributed on the rotary disc in an annular array mode, a locking support is arranged on the side, close to the vibration feeding machine, of the upper end of the main machine frame, and a locking mechanism used for automatically locking screws is fixedly installed on the locking support. A feeding disc for manual feeding is arranged at the side end of the main body rack; according to the automatic screw locking device, the locking depth is set according to the production requirement of a product structure, and the problems that the locking depth is not consistent when a pneumatic tool is manually used, and secondary reworking needs to be carried out are solved.

The utility model relates to the technical field of polishing tools, in particular to a curved surface polishing device with a quick release structure, which comprises a clamping rod, a polishing head, a locking piece and abrasive paper. Aiming at the technical problem that an existing grinding mode has defects, the clamping rod can be used for being matched with an existing electric tool and an existing pneumatic tool, so that the grinding efficiency is improved, the clamping rod can extend the grinding range, go deep into an inner curved surface and comprehensively grind the inner curved surface, and therefore the grinding effect on the inner curved surface is improved; and the overall assembly structure of the device achieves quick disassembly design, and grinding abrasive paper can be quickly replaced so as to facilitate continuous grinding.

The utility model provides a novel pneumatic straight-through quick-insertion structure, and belongs to the technical field of quick-insertion structures. The quick insertion structure comprises an outer pipe and a stop block. A first cavity and a second cavity are formed in the outer pipe, and the first cavity communicates with the second cavity; the stop block is arranged in the outer pipe and used for limiting the stroke of the external connecting pipe, so that the external connecting pipe connected with the first cavity is located in the first cavity, and the external connecting pipe connected with the second cavity is located in the second cavity; the first cavity is provided with a first locking assembly, and the first locking assembly is used for locking an external connecting pipe connected with the first cavity; the second cavity is provided with a second locking assembly, and the second locking assembly is used for locking an external connecting pipe connected with the second cavity. The quick insertion structure has the effects of specifically improving the connecting efficiency of the air source and the pneumatic tool and the use safety.

The cylinder body punching device for the pneumatic tool comprises a table body, a frame body is arranged at the top end of the table body, a first electric cylinder is arranged in the middle of the top end of the frame body in a penetrating mode, a punching mechanism is arranged on the portion, at the bottom end of the first electric cylinder, of the inner side of the frame body, and a positioning seat is arranged in the middle of the top end of the table body. Second electric cylinders are arranged in the middles of the two sides of the frame body. The isolation protection assemblies are arranged at the two ends of the frame body, during use, the isolation protection effect on the interior of the frame body is achieved through an isolation cover and a tempered glass protection piece arranged in the isolation cover, safety accidents caused by chippings splashing or knife breaking when the device conducts punching machining on the pneumatic tool cylinder body are avoided, and the safety performance of the device is further improved; and a second electric cylinder is started to drive the isolation cover to ascend and descend through a connecting frame, so that the pneumatic tool cylinder body can be conveniently taken and placed, technical workers can conveniently operate and use the device, and practicability is high.

1. Name of the product in this design: Radial Flexible Force Control Device. 2. Application of this design: for controlling the grinding force of power tools, pneumatic tools, instruments, and equipment. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

A specialized tool for replacing an anchor pin bushing on a large truck or trailer is provided. The tool is a solid, cylindrical shaft designed to be driven into the anchor pin bushing by an operator using a manual hammer. The tool features a cutout segment that allows it to be maneuvered around the wheel hub assembly while driving the bushing, thus eliminating the need for a burdensome removal of the wheel hub assembly. The tool can be used to remove an old bushing and to install a new bushing into an eye of a brake frame housing. The tool may also include a removable installation sleeve, which is used to prevent a new bushing from being driven in too far. An alternate embodiment describes the specialized tool in a format designed to be driven by standard pneumatic air tools.

The invention discloses a process optimization method for preventing abnormal fracture of a double-line bolt snap ring, which belongs to the technical field of machine manufacturing, and is characterized by comprising the following steps of: a, respectively optimally designing the thickness tolerance of the snap ring and the depth tolerance of a bush socket; b, the height of a base step of the lining tool is adjusted to be 1.00-1.10 mm; c, bolts are inserted into the structural holes, hole position symmetrical installation is carried out in the installation process, and low-rotating-speed and medium-torque installation is carried out through an electric tool or a pneumatic tool; and d, dry film lubrication treatment is conducted on the inner surfaces of the clamping ring body and the bush counter bore side. By reducing the friction coefficient of the contact surface, follow-up hardening caused by the material Bauschinger effect is effectively avoided, and abnormal breakage of the clamping ring in the reciprocating disassembly and assembly process of the double-line bolt can be effectively avoided.

The utility model discloses a pneumatic tool low noise air flow channel and noise reduction structure, relates to the pneumatic tool noise reduction technical field, and comprises a pneumatic wrench and a noise reduction pipe communicated with the pneumatic wrench air inlet, the noise reduction pipe comprises an air inlet end, a buffer section, a diversion section and an air outlet section, the air inlet end, the buffer section, the diversion section and the air outlet section are welded and fixed, a spiral air inlet groove is formed in the inner wall of the air inlet end, a plurality of conical protrusions which are symmetrically arranged in a surrounding mode are fixedly arranged on the inner wall of the buffering section, a plurality of flow guide blades which are arranged at intervals are fixedly arranged in the flow guide section, the flow guide blades are arranged in an arc shape, and the air outlet section is of a gradually-shrinking structure. According to the noise reduction pipe, the air inlet end, the buffering section, the flow guide section and the air outlet section are arranged, a special flow channel structure can be adopted to effectively reduce noise of airflow entering the pneumatic tool, and damage of noise to hearing and physical and psychological health of operators is reduced.

The invention discloses an intelligent electric meter dismounting device which is applied to the field of electric meter dismounting and comprises a fixing unit, an image recognition unit, a pneumatic tool unit and an electric tool unit, the fixing unit comprises a device frame, a meter position tray and a man-machine control platform, and the image recognition unit comprises a camera shooting assembly and an image processing assembly. The pneumatic tool unit comprises an air compressor, an X-direction moving shaft and a Z-direction moving shaft, and the electric tool unit comprises a drill motor and a bit motor. According to the invention, the electric meter and the screw type can be accurately identified, the accuracy of the dismounting operation is ensured, the electric meter damage caused by misoperation is effectively avoided, the maintenance cost is reduced, the device is compatible with a single-phase electric meter and a three-phase electric meter, the universality and flexibility of the device are improved, and the electric meter dismounting requirements in different scenes can be met.

The utility model discloses a manual self-locking type clamping mechanism, which relates to the technical field of pneumatic tool clamps, and comprises a vertically arranged transition plate, a clamping cylinder, a pressing arm, a connecting rod and a handle, a mechanical valve is arranged on the side surface of the transition plate; a fixed clamping plate is arranged at the upper end of the transition plate; the rear end of the pressing arm is hinged to the fixed clamping plate, and a pressing head is arranged at the front end of the pressing arm and connected with the mechanical valve through a connecting piece. A cylinder body of the clamping air cylinder is hinged to the transition plate. The connecting rod is located above the pressing arm, the front end of the connecting rod is bent downwards to be hinged to the fixed clamping plate, the rear end of the connecting rod is hinged to a piston rod of the clamping air cylinder through a rotating block, and the bent end of the connecting rod is hinged to the pressing arm through a rotating clamping plate. The lower end of the handle is fixedly connected with the connecting rod through a connecting block. Rapid manual self-locking can be achieved, errors are effectively compensated, and self-locking is achieved through a rapid adjusting mechanism.

The utility model discloses a pneumatic tool for assembling a switch trigger, which comprises a mounting seat, a pneumatic mechanism for assembling the switch trigger is arranged at one end of the mounting seat, a positioning component matched with the pneumatic mechanism is arranged at the other end of the mounting seat, and a positioning die is arranged between the pneumatic mechanism and the positioning component. And the positioning die is fixed on the mounting seat. According to the utility model, the original step of manually beating the trigger to mount the cylindrical pin is changed into pneumatic mounting through the matching of the pneumatic mechanism and the positioning assembly, so that the automation degree of trigger assembly is improved, the mounting precision is ensured, the cylindrical pin can be concentric after being inserted into the trigger, and the limiting lengths of the two ends are the same; through the installation of the pneumatic mechanism, the installation speed of the cylindrical pin is increased, the production period is greatly shortened, the labor intensity is reduced, the physical power consumption of operators and possible fatigue and industrial injury risks caused by manual installation of the cylindrical pin are reduced, and the pneumatic mechanism is safe and improves the efficiency.