Clutch spring assembly fixture
Technical Field
The invention belongs to the technical field of automobile clutches, and particularly relates to a clutch spring assembling tool.
Background
With the rapid development of the automobile clutch industry in China and even in the world, various new varieties of clutch disc assemblies continuously appear, and with the continuous appearance of new design schemes, new correspondingly matched assembly tools are continuously updated, so that the assembly is simpler, more efficient and safer.
In the assembly of clutch, need pack into the damping gasket with the spring, but the length of spring generally is greater than the length of damping gasket window, need can pack into the window of damping gasket with the spring after the certain length of spring compression, the current installation to the spring adopts manual assembly's mode mostly, assembly efficiency is underneath, because spring force is great, the spring pops out under the effect of elasticity easily when compression spring, cause certain potential safety hazard to operating personnel, make the assembly of spring change more difficult.
Disclosure of Invention
The invention provides a clutch spring assembling tool for overcoming the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a clutch spring assembling tool comprises an installation plate, a processing plate arranged on the installation plate, a fixed rod arranged on the processing plate and a cover plate sleeved on the fixed rod, wherein a processing groove is formed in the processing plate, a first connecting plate is arranged at the bottom of the installation plate, an air cylinder is arranged on the first connecting plate, a first push block matched with the air cylinder is arranged in the processing groove, and the first push block can move along the inner wall of the processing groove; installing gaskets at two ends of a spring, enabling the gaskets and the spring to be mutually matched, putting the gaskets and the spring into a processing groove together, sleeving a damping gasket on a fixed rod, enabling the damping gasket to move downwards along the fixed rod, enabling a window of the damping gasket to be aligned with the spring, fixing the damping gasket under the action of the fixed rod, avoiding the damping gasket from deviating in the processing process, starting a cylinder switch, pushing a first push block to move along the inner wall of the processing groove under the action of a cylinder, providing pressure for the gaskets by the first push block, pushing the gaskets to extrude the spring, automatically dropping the damping gasket into a gap of the gaskets under the action of gravity after the spring is compressed to be less than the length of the window, enabling the gaskets and the spring to be arranged in the window of the damping gasket, and completing the assembly of the damping gasket and the spring; the spring is placed in the processing groove, the spring is extruded under the action of the air cylinder, the spring is convenient to compress, the spring can be conveniently installed in a window of the damping gasket, the efficiency of installing the spring is improved, the spring is installed by mechanical semi-automation, the installation of the spring is more labor-saving, the labor is saved, and the spring installation step is simplified; under mutually supporting of first ejector pad and gasket, make the spring arrange the processing inslot in and compress, prevent that the spring from popping out at the non-uniform atress of course of working, avoid the spring to cause the damage to operating personnel, promote the security in the spring assembling process.
A first movable groove matched with the processing groove is formed in the processing plate, a second push block matched with the first push block is arranged in the first movable groove, the second push block is connected with a piston rod of the air cylinder, and one end of the second push block is of a conical structure; under the conical structure of the second push block, the second push block is convenient to be matched with the first push block, so that the first push block can be pushed to move along the inner wall of the processing groove when the cylinder pushes the second push block to move forwards, the spring is convenient to be extruded under the action of the first push block, and the spring is arranged on the damping gasket; the power to the cylinder through the second ejector pad plays the transmission effect, and the stable transmission of power for first ejector pad of cylinder that makes, the acceptance that makes first ejector pad can be stable comes from the power of cylinder, is convenient for extrude the spring under the effect of cylinder, uses manpower sparingly, prevents that the spring atress from all popping out and making operating personnel be injured.
A sliding groove is formed in the inner wall of the first movable groove, a sliding block matched with the sliding groove is arranged on the side wall of the second push block, and a return spring matched with the sliding block is arranged in the sliding groove; a through cavity is formed in the second push block, and a first limiting rod matched with the through cavity is arranged at the bottom of the first movable groove; under the mutual cooperation of the sliding groove and the sliding block, the movement of the second push block is positioned, and meanwhile, the maximum distance of the movement of the second push block is limited, so that the maximum stroke of the air cylinder is limited, and the second push block is prevented from being directly contacted with the inner wall of the machining groove to damage the machining groove and the second push block; the first limiting rod is matched with the first movable groove and plays a limiting role on the motion stroke of the second pushing block together with the sliding chute sliding block, the burden of the sliding chute sliding block is reduced, the service life of the sliding block is originally long, the second pushing block moves along the side wall of the first limiting block, and the second pushing block can conveniently push the first pushing block to move; when the cylinder moves back, under the action of the reset spring, the sliding block is pushed to move towards one end of the sliding groove, so that the automatic reset of the second pushing block is completed, the first pushing block is disengaged from the cushion block, and the processed workpiece is conveniently taken out.
The top of the cover plate is provided with a counterweight ring, the inner wall of the counterweight ring is provided with a first mounting groove, a fixed spring is arranged in the first mounting groove, one end of the fixed spring is provided with a convex block, and the side wall of the fixed spring is provided with a groove matched with the convex block; after the damping gasket is sleeved on the fixed rod, the cover plate is sleeved on the fixed plate, so that the cover plate is pressed on the top of the damping gasket, when the spring is compressed to a length smaller than the length of a damping gasket window, under the action of gravity of the counterweight ring, pressure is generated on the damping gasket, the damping gasket automatically drops downwards, the spring enters the window, the assembly of the damping gasket and the spring is completed, the assembly effect of the damping gasket and the spring is improved, the damping gasket is prevented from being clamped on the fixed rod to influence the assembly efficiency of a workpiece, and the assembly of the spring is completed quickly; under the cooperation of lug and recess, make the apron can't rotate easily after emboliaing on the dead lever, play the fixed action to the apron, avoid the apron lid to lead to the fact the influence in the installation of damping pad window position department, prevent that the apron from to the spring.
The bottom of the cover plate is provided with a second mounting groove, the bottom of the second mounting groove is provided with a connecting spring, the bottom of the connecting spring is provided with a second connecting plate, and the bottom of the second connecting plate is provided with a sucker; when the damping gasket is sleeved on the fixed rod, the damping gasket is placed on a plane, the cover plate and the damping gasket are mutually opposite, the cover plate is pressed downwards to enable the suction cup and the damping gasket to be mutually contacted, the cover plate is fixed under the action of the suction cup, then the cover plate and the damping gasket are sleeved on the fixed rod together, pressure is provided for the damping gasket through the counterweight ring, and the spring installation efficiency is improved; after spring mounting accomplished, up promote the apron along the dead lever, drive damping gasket up-ward movement under the effect of sucking disc, be convenient for take out damping gasket from the dead lever, further promotion is to the machining efficiency of work piece.
A first mounting pipe is arranged at the top of the fixing rod, a mounting cavity is arranged in the first mounting pipe, a first through hole is formed in the side wall of the mounting cavity, a second limiting rod penetrates through the first through hole, a first connecting rod is arranged in the mounting cavity, and the first connecting rod is connected with the second limiting rod through a limiting spring; when the assembly tool is not used, the cover plate is sleeved on the fixed rod, the cover plate covers the processing groove, the cover plate has a protection effect on the processing groove, and impurities are prevented from falling into the processing groove to affect the processing of the workpiece; under spacing spring's effect, make the second gag lever post stretch out from the installation intracavity to play limiting displacement to the apron, make the apron can't deviate from the dead lever, promote the cooperation effect of apron and processing board, avoid the apron to deviate from the processing board and lead to the fact the loss of apron.
A second mounting pipe is arranged at the top of the first mounting pipe, a movable cavity is arranged in the second mounting pipe, a push rod penetrates through the movable cavity, a first push plate matched with the second limiting rod is arranged at the bottom of the push rod, and a chute matched with the first push plate is arranged on one side of the second limiting rod; when the second limiting rod needs to extend out of the mounting cavity, the push rod is pushed downwards, the push rod pushes the push plate to move downwards, the push plate pushes the second limiting rod to extend out of the mounting cavity, the cover plate is limited under the action of the second limiting rod, the cover plate is prevented from being separated from the fixing rod, the processing groove is protected when the tool is not used, and the cover plate is prevented from being lost due to random placement; under the effect of chute, make first push pedal when down moving, be convenient for promote the second gag lever post under the effect of first push pedal and stretch out from the installation intracavity, can be convenient control the second gag lever post, promote the cooperation effect of apron and processing board.
A first limiting plate and a second limiting plate are arranged in the movable cavity, the first limiting plate is arranged above the second limiting plate, through grooves are formed in the first limiting plate and the second limiting plate respectively, a third limiting rod matched with the through grooves is arranged on the push rod, and a hand wheel is arranged at the top of the push rod; when the second limiting rod needs to extend out of the mounting cavity, the third limiting rod is aligned with the through groove, the push rod is pushed downwards, the third limiting rod is pushed into the position below the second limiting plate, the push rod is rotated under the action of the hand wheel, the second limiting plate is enabled to limit the third limiting rod, and the second limiting rod can limit the cover plate conveniently; when needs take out the apron from the dead lever, rotate the push rod, make third gag lever post and logical groove align, make third gag lever post move to first limiting plate top, play the supporting role to the third gag lever post under the effect of first limiting plate to make the second gag lever post enter into the installation cavity, be convenient for take out the apron from the dead lever, also conveniently pack into the dead lever with the damping gasket simultaneously in, be convenient for to the assembly of spring.
A second movable groove is formed in the bottom of the machining groove, a connecting block penetrates through the second movable groove, and a second push plate matched with the first push block is arranged on the connecting block; a supporting spring matched with the connecting block is arranged in the second movable groove; put into the processing inslot with gasket and spring back, the second push pedal contacts with the gasket lateral wall, under supporting spring's effect, make the second push pedal produce thrust to the gasket, be convenient for push the gasket and move toward the position department of first ejector pad under the effect of second push pedal, make gasket and first ejector pad form the cooperation each other, under the mutually supporting of second push pedal and first ejector pad, play certain fixed effect to the gasket, prevent to pop out from the processing inslot when the spring compresses, promote the security of frock.
A first connecting groove is formed in the first pushing block, and a fixing groove is formed in the inner wall of the first connecting groove; first connecting groove and fixed slot all mutually support with the gasket, under the effect of first connecting groove and fixed slot, the fixed effect of further enhancement gasket and first ejector pad, the effectual condition that pops out from the processing inslot of spring when the extrusion spring that prevents that the spring from causing the injury to operating personnel, security when promoting the spring assembly.
The invention has the following advantages: the spring is placed in the processing groove, the spring is extruded under the action of the air cylinder, the spring is convenient to compress, the spring can be conveniently installed in a window of the damping gasket, the efficiency of installing the spring is improved, the spring is installed by mechanical semi-automation, the installation of the spring is more labor-saving, the labor is saved, and the spring installation step is simplified; under mutually supporting of first ejector pad and gasket, make the spring arrange the processing inslot in and compress, prevent that the spring from popping out at the non-uniform atress of course of working, avoid the spring to cause the damage to operating personnel, promote the security in the spring assembling process.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the mounting plate of the present invention.
FIG. 3 is a first cross-sectional view of the mounting plate of the present invention.
Fig. 4 is an enlarged view of a portion a in fig. 3.
FIG. 5 is a second cross-sectional view of the mounting plate of the present invention.
Fig. 6 is an enlarged view of fig. 5 at B.
Fig. 7 is a third schematic sectional view of the mounting plate of the present invention.
Fig. 8 is an enlarged view of fig. 7 at C.
FIG. 9 is a cross-sectional view of a fourth embodiment of the mounting plate of the present invention.
Fig. 10 is an enlarged view of fig. 9 at D.
Fig. 11 is a schematic structural diagram of the cover plate of the present invention.
FIG. 12 is a first cross-sectional view of a cover plate according to the present invention.
FIG. 13 is a second cross-sectional view of the cover plate of the present invention.
Fig. 14 is a schematic view of a damping shim.
Fig. 15 is a schematic view of a spring structure.
FIG. 16 is a schematic view of the damper pad and spring assembly.
Detailed Description
As shown in fig. 1 to 16, a clutch spring assembly fixture includes a mounting plate 1, a processing plate 2 disposed on the mounting plate 1, a fixing rod 3 disposed on the processing plate 2, and a cover plate 44 sleeved on the fixing rod 3, wherein four processing grooves 21 are disposed on the processing plate 2, the four processing grooves are circumferentially distributed on the surface of the processing plate, the positions of the processing grooves correspond to the positions of windows 51 on a damping gasket 5, and the cover plate is of a cross-shaped structure, so that under the action of the cover plate, when the fixture is not in use, the fixture can protect the processing grooves to prevent sundries from falling into the processing grooves to block the processing grooves; a first connecting plate 11 is arranged at the bottom of the mounting plate 1, an air cylinder 12 is arranged on the first connecting plate 11, a first push block 23 matched with the air cylinder 12 is arranged in the machining groove 21, and the first push block 23 can move along the inner wall of the machining groove 21; the processing plate is of a square structure, the first connecting plates are arranged at four corners of the processing plate, two first push blocks are arranged in one processing tank, and two ends of the processing tank are respectively arranged on the two first push blocks.
Installing gaskets at two ends of a spring, enabling the gaskets and the spring to be mutually matched, putting the gaskets and the spring into a processing groove together, sleeving a damping gasket on a fixed rod, enabling the damping gasket to move downwards along the fixed rod, enabling a window of the damping gasket to be aligned with the spring, fixing the damping gasket under the action of the fixed rod, avoiding the damping gasket from deviating in the processing process, starting a cylinder switch, pushing a first push block to move along the inner wall of the processing groove under the action of a cylinder, providing pressure for the gaskets by the first push block, pushing the gaskets to extrude the spring, automatically dropping the damping gasket into a gap of the gaskets under the action of gravity after the spring is compressed to be less than the length of the window, enabling the gaskets and the spring to be arranged in the window of the damping gasket, and completing the assembly of the damping gasket and the spring; the spring is placed in the processing groove, the spring is extruded under the action of the air cylinder, the spring is convenient to compress, the spring can be conveniently installed in a window of the damping gasket, the efficiency of installing the spring is improved, the spring is installed by mechanical semi-automation, the installation of the spring is more labor-saving, the labor is saved, and the spring installation step is simplified; under mutually supporting of first ejector pad and gasket, make the spring arrange the processing inslot in and compress, prevent that the spring from popping out at the non-uniform atress of course of working, avoid the spring to cause the damage to operating personnel, promote the security in the spring assembling process.
The damping gasket 5 is provided with four windows 51 which are circumferentially distributed on the surface of the damping gasket, the inner wall of each window is provided with a second connecting groove 52, the side wall of the gasket 61 is provided with a second connecting rod 64, the side wall of the gasket is also provided with three limiting plates 63, the number of the three limiting plates is two, the interval between the three limiting plates is the same as the thickness of the damping gasket, and the gasket is convenient to be matched with the windows on the damping gasket under the action of the third limiting plates; the other side of the gasket is provided with a fixing frame 62 which is used for fixing the spring 6 so as to fix the spring on the gasket conveniently; when the spring is installed, two gaskets are respectively arranged at two ends of the spring, so that the spring is conveniently installed in a window of the damping gasket; the second connecting rod corresponds to the second connecting groove in position.
The processing plate 2 is provided with a first movable groove matched with the processing groove 21, the first movable groove is arranged at one end of the processing groove, and the first movable groove is communicated with the processing groove; a second push block 22 matched with the first push block 23 is arranged in the first movable groove, the second push block 22 is connected with a piston rod of the air cylinder 12, one end of the second push block 22 is of a conical structure, and one second push block is matched with two first push blocks; under the conical structure of the second push block, the second push block is convenient to be matched with the first push block, so that the first push block can be pushed to move along the inner wall of the processing groove when the cylinder pushes the second push block to move forwards, the spring is convenient to be extruded under the action of the first push block, and the spring is arranged on the damping gasket; the power to the cylinder through the second ejector pad plays the transmission effect, and the stable transmission of power for first ejector pad of cylinder that makes, the acceptance that makes first ejector pad can be stable comes from the power of cylinder, is convenient for extrude the spring under the effect of cylinder, uses manpower sparingly, prevents that the spring atress from all popping out and making operating personnel be injured.
A sliding groove 27 is arranged on the inner wall of the first movable groove, a sliding block 222 matched with the sliding groove 27 is arranged on the side wall of the second push block 22, and a return spring 271 matched with the sliding block 222 is arranged in the sliding groove 27; a through cavity is formed in the second push block 22, and a first limiting rod 26 matched with the through cavity is arranged at the bottom of the first movable groove; under the mutual cooperation of the sliding groove and the sliding block, the movement of the second push block is positioned, and meanwhile, the maximum distance of the movement of the second push block is limited, so that the maximum stroke of the air cylinder is limited, and the second push block is prevented from being directly contacted with the inner wall of the machining groove to damage the machining groove and the second push block; the first limiting rod is matched with the first movable groove and plays a limiting role on the motion stroke of the second pushing block together with the sliding chute sliding block, the burden of the sliding chute sliding block is reduced, the service life of the sliding block is originally long, the second pushing block moves along the side wall of the first limiting block, and the second pushing block can conveniently push the first pushing block to move; when the cylinder moves back, under the action of the reset spring, the sliding block is pushed to move towards one end of the sliding groove, so that the automatic reset of the second pushing block is completed, the first pushing block is disengaged from the cushion block, and the processed workpiece is conveniently taken out.
The top of the cover plate 44 is provided with a counterweight ring 4, the inner wall of the counterweight ring 4 is provided with a first mounting groove 41, a fixed spring 42 is arranged in the first mounting groove 41, one end of the fixed spring 42 is provided with a convex block 43, and the side wall of the fixed rod 3 is provided with a groove 31 matched with the convex block 43; after the damping gasket is sleeved on the fixed rod, the cover plate is sleeved on the fixed plate, so that the cover plate is pressed on the top of the damping gasket, when the spring is compressed to a length smaller than the length of a damping gasket window, under the action of gravity of the counterweight ring, pressure is generated on the damping gasket, the damping gasket automatically drops downwards, the spring enters the window, the assembly of the damping gasket and the spring is completed, the assembly effect of the damping gasket and the spring is improved, the damping gasket is prevented from being clamped on the fixed rod to influence the assembly efficiency of a workpiece, and the assembly of the spring is completed quickly; under the cooperation of lug and recess, make the apron can't rotate easily after emboliaing on the dead lever, play the fixed action to the apron, avoid the apron lid to lead to the fact the influence in the installation of damping pad window position department, prevent that the apron from to the spring.
The bottom of the cover plate 44 is provided with a second mounting groove, the bottom of the second mounting groove is provided with a connecting spring 45, the bottom of the connecting spring 45 is provided with a second connecting plate 46, the bottom of the second connecting plate 46 is provided with a sucker 47, and the sucker is made of rubber and can deform so as to be convenient for fixing the damping gasket under the action of the sucker; when the damping gasket is sleeved on the fixed rod, the damping gasket is placed on a plane, the cover plate and the damping gasket are mutually opposite, the cover plate is pressed downwards to enable the suction cup and the damping gasket to be mutually contacted, the cover plate is fixed under the action of the suction cup, then the cover plate and the damping gasket are sleeved on the fixed rod together, pressure is provided for the damping gasket through the counterweight ring, and the spring installation efficiency is improved; after spring mounting accomplished, up promote the apron along the dead lever, drive damping gasket up-ward movement under the effect of sucking disc, be convenient for take out damping gasket from the dead lever, further promotion is to the machining efficiency of work piece.
A first mounting pipe 32 is arranged at the top of the fixing rod 3, a mounting cavity 321 is arranged in the first mounting pipe 32, a first through hole is arranged on the side wall of the mounting cavity 321, a second limiting rod 33 penetrates through the first through hole, a first connecting rod 322 is arranged in the mounting cavity 321, and the first connecting rod 322 is connected with the second limiting rod 33 through a limiting spring 323; when the assembly tool is not used, the cover plate is sleeved on the fixed rod, the cover plate covers the processing groove, the cover plate has a protection effect on the processing groove, and impurities are prevented from falling into the processing groove to affect the processing of the workpiece; under spacing spring's effect, make the second gag lever post stretch out from the installation intracavity to play limiting displacement to the apron, make the apron can't deviate from the dead lever, promote the cooperation effect of apron and processing board, avoid the apron to deviate from the processing board and lead to the fact the loss of apron.
A second mounting pipe 34 is arranged at the top of the first mounting pipe 32, a movable cavity 341 is arranged in the second mounting pipe 34, a push rod 36 penetrates through the movable cavity 341, a first push plate 362 matched with the second limiting rod 33 is arranged at the bottom of the push rod 36, and a chute matched with the first push plate 362 is arranged at one side of the second limiting rod 33; when the second limiting rod needs to extend out of the mounting cavity, the push rod is pushed downwards, the push rod pushes the push plate to move downwards, the push plate pushes the second limiting rod to extend out of the mounting cavity, the cover plate is limited under the action of the second limiting rod, the cover plate is prevented from being separated from the fixing rod, the processing groove is protected when the tool is not used, and the cover plate is prevented from being lost due to random placement; under the effect of chute, make first push pedal when down moving, be convenient for promote the second gag lever post under the effect of first push pedal and stretch out from the installation intracavity, can be convenient control the second gag lever post, promote the cooperation effect of apron and processing board.
A first limit plate 342 and a second limit plate 343 are arranged in the movable cavity 341, the first limit plate 342 is arranged above the second limit plate 343, through grooves are respectively arranged on the first limit plate 342 and the second limit plate 343, a third limit rod 361 matched with the through grooves is arranged on the push rod 36, and a hand wheel 35 is arranged at the top of the push rod 36; when the second limiting rod needs to extend out of the mounting cavity, the third limiting rod is aligned with the through groove, the push rod is pushed downwards, the third limiting rod is pushed into the position below the second limiting plate, the push rod is rotated under the action of the hand wheel, the second limiting plate is enabled to limit the third limiting rod, and the second limiting rod can limit the cover plate conveniently; when needs take out the apron from the dead lever, rotate the push rod, make third gag lever post and logical groove align, make third gag lever post move to first limiting plate top, play the supporting role to the third gag lever post under the effect of first limiting plate to make the second gag lever post enter into the installation cavity, be convenient for take out the apron from the dead lever, also conveniently pack into the dead lever with the damping gasket simultaneously in, be convenient for to the assembly of spring.
A second movable groove 24 is arranged at the bottom of the processing groove 21, a connecting block 251 is arranged in the second movable groove 24 in a penetrating manner, and a second push plate 25 matched with the first push block 23 is arranged on the connecting block 251; a supporting spring 241 matched with the connecting block 251 is arranged in the second movable groove 24; put into the processing inslot with gasket and spring back, the second push pedal contacts with the gasket lateral wall, under supporting spring's effect, make the second push pedal produce thrust to the gasket, be convenient for push the gasket and move toward the position department of first ejector pad under the effect of second push pedal, make gasket and first ejector pad form the cooperation each other, under the mutually supporting of second push pedal and first ejector pad, play certain fixed effect to the gasket, prevent to pop out from the processing inslot when the spring compresses, promote the security of frock.
A first connecting groove 231 is formed in the first pushing block 23, and a fixing groove 232 is formed in the inner wall of the first connecting groove 231; the first connecting groove is matched with the second connecting rod, and the fixed groove is matched with the third limiting plate; under the effect of first connecting groove and fixed slot, the fixed effect of further reinforcing gasket and first ejector pad, the effectual condition that pops out from the processing inslot of spring when the extrusion spring that prevents that the spring from causing the injury to operating personnel, security when promoting the spring assembly.
When the spring is assembled, the hand wheel is rotated to align the third limiting rod with the through cavity, the hand wheel is pulled upwards to move the push rod upwards, so that the second limiting rod enters the installation cavity, and the cover plate is convenient to take out from the fixed rod; placing two gaskets at two ends of the spring, placing the spring and the gaskets into the processing groove together, clamping the gaskets between the second push plate and the first push block, and pushing the gaskets to be close to the first push block under the action of the second push plate so that the spring is stably placed in the processing groove; placing a damping gasket on the platform, then placing a cover plate on the damping gasket, pressing the cover plate downwards to enable the cover plate to be fixed with the damping gasket under the action of a sucker, sleeving the damping gasket and the cover plate on a fixed rod together, and enabling a window on the damping gasket to be opposite to the processing groove; starting the air cylinder to enable the air cylinder to push the second push block, enabling the second push block to transmit power of the air cylinder to the first push block, enabling the first push block to move along the inner wall of the machining groove, enabling the first push block to push the gasket to move relatively, enabling the spring to start to be compressed, enabling the damping gasket to fall down under the action of the balancing weight, enabling the spring to be installed in a window on the damping gasket, and completing installation of the spring; starting the air cylinder again to reset the air cylinder, taking out the assembled workpiece through the cover plate, and finishing the processing of the workpiece; the stability of product has both been guaranteed, has improved work efficiency again by a wide margin, and the security is also high, when not using the frock, embolias the dead lever with the apron on, makes the apron arrange the processing groove top in, rotates the push rod, makes first push pedal promote the second gag lever post and stretches out from the installation cavity, plays fixed action to the apron, promotes the connection effect of apron and frock.