CN218982409U - Ash removal equipment for inner cavity of die - Google Patents

Abstract

The utility model relates to the technical field of ash removing equipment, in particular to ash removing equipment for an inner cavity of a die, which comprises a box body, wherein supporting legs are fixedly arranged at four corners of the bottom end of the box body, first electric push rods are transversely and fixedly arranged in the middle of the inner walls of the left side and the right side of the box body, clamping devices are fixedly arranged at the opposite ends of the two first electric push rods, and each clamping device comprises a clamping plate.

Description

Ash removal equipment for inner cavity of die

Technical Field

The utility model relates to the technical field of ash removing equipment, in particular to ash removing equipment for an inner cavity of a die.

Background

The stamping die is a special technological equipment for processing materials (metal or nonmetal) into parts (or semi-finished products) in cold stamping, and is called a cold stamping die (commonly called a cold stamping die, wherein the stamping is to apply pressure to the materials by using a die arranged on a press machine at room temperature so as to separate or plastically deform the materials);

the existing mould ash removal equipment needs to fix the mould when the mould removes dust, but the existing ash removal equipment cannot be used for stably fixing moulds with different sizes, so that the dust removal work is affected, the existing ash removal equipment is only used for removing dust by means of induced draft, the efficiency is low, the dust collection function is not achieved, certain limitations exist for some sizes, and therefore the ash removal equipment for the inner cavity of the mould is provided for solving the problems.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides ash removing equipment for an inner cavity of a die.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides an ash removal equipment for mould inner chamber, the power distribution box comprises a box body, the equal fixed mounting in bottom four corners of box has the supporting leg, the middle part of the left and right sides inner wall of box is all horizontal fixed mounting has first electric putter, two the equal fixed mounting of relative one end of first electric putter has clamping device, clamping device includes splint, the outside and the one end fixed connection of first electric putter keeping away from the case wall of splint, the spout has been seted up vertically to the inboard of splint, the inside vertical installation of spout has the slide bar, the upper portion and the lower part of slide bar all overlap and have the second spring, the upper portion and the lower part of slide bar just are located two second springs between equal movable sleeve have with spout assorted slider, two the one end that the slider kept away from respectively with the one end fixed connection of adjacent second spring, the other end and the cell wall fixed connection of spout of second spring, one side fixed mounting that the slider kept away from first electric putter has the fastening plate, the top mid-mounting of box has the motor, the motor is located the rear of clamping device, the output shaft vertical opening of spout has the spout, the inside vertical installation of spout has the slide bar, the upper portion and the lower part of slide bar and the inside of a connecting rod are located the top wall fixed mounting of the buffer housing, the buffer housing is kept away from to the side of the inner wall fixed mounting, the buffer housing is located down the top wall fixed mounting, the top wall is connected with the top wall fixed with the buffer housing, the buffer housing is kept away from the top fixedly, the limiting block is fixedly provided with a plug rod at one end close to the clamping device, the middle parts of the top wall and the bottom wall of the box body are fixedly provided with a carrier plate, the carrier plate is positioned at the rear of the buffer shell, the rear end of the plug rod penetrates through the buffer shell and the carrier plate to be fixedly provided with a roller frame, the inside of the roller frame is movably provided with a roller, the outer side of the roller is contacted with the surface of a cam, the middle part of one side of the plug rod close to the clamping device is vertically and fixedly provided with a second electric push rod, the opposite ends of the two second electric push rods are fixedly provided with cleaning devices, the utility model discloses a vacuum cleaner, including box, hinge movable mounting, handle, air pipe, ventilation pipe, box, hinge movable mounting, box, handle, the equal fixed mounting in left and right sides of diapire of box has the ventilation pipe, the ventilation pipe of equal fixed mounting in left and right sides of diapire of box, the ventilation pipe is located clamping device's below, the top fixed mounting of ventilation pipe has the box of collecting, the bottom of collecting the box is linked together with the ventilation pipe, the air pipe that is linked together is all installed to the bottom middle part fixed mounting of box, the one end that the dust collector was kept away from to the air pipe passes the bottom of box and is linked together with adjacent ventilation pipe, the front of box is through hinge movable mounting and is equipped with the chamber door with it, the front right side of chamber door is fixed to be equipped with the handle.

Preferably, the inner side of the fastening plate is provided with an anti-slip rubber pad.

Preferably, the cleaning device comprises a top plate, one side middle part that the top plate is close to the inserted bar and the relative one end fixed connection of second electric putter, the movable groove has all transversely been seted up to the left and right sides of the one end that the inserted bar was kept away from to the top plate, movable block is movably installed to the movable inslot, the one end that the inserted bar was kept away from to movable block and top plate all is equipped with the brush hair, the movable groove that is linked together with the movable groove has all transversely been seted up to the left and right sides that the top plate is close to one end of inserted bar, the movable block is close to one side vertical installation that the movable groove has the regulation pole, the one end that the movable block was kept away from to the regulation pole passes the movable groove and extends to top plate outside threaded connection has fixation nut.

Preferably, the middle part of the front surface of the box door is provided with a mounting opening, and an observation window matched with the mounting opening is arranged in the mounting opening.

Preferably, universal wheels are fixedly arranged at the bottom ends of the supporting legs.

The utility model provides ash removal equipment for a die cavity, which has the beneficial effects that: when in use, the die is held between the two clamping plates, the two first electric push rods are started, the first electric push rods stretch to drive the connected clamping plates to move along with the clamping plates, the two clamping plates are driven to move along with the clamping plates when moving to clamp and fix the left side and the right side of the die, the two clamping plates positioned at the same side are contacted with the die along with the movement of the clamping plates, the die extrudes the two clamping plates to enable the two clamping plates to move away from each other until the die is inserted between the two clamping plates to collide with the clamping plates, the die is fixed, the clamping plates extrude the clamping plates, the clamping plates drive the sliding blocks to move along with the sliding blocks to compress the second springs, the second springs generate acting forces opposite to the moving direction of the sliding blocks, so that the clamping of the clamping plates to the die is more stable, the dies with different widths can be fixed by adjusting the distance between the two clamping plates, the distance between the two fastening plates can be adjusted by the contraction of the second spring, so that the fixing of the dies with different thicknesses is more stable, after the fixing is finished, the two adjusting rods are pushed to move close to or far away from each other, the adjusting rods drive the movable blocks to move along with the movable blocks so as to drive the connected bristles to move, the reduction and expansion of the bristle range are realized, the bristle range can be adjusted according to the size of the dies needing cleaning, the fixing threads are rotated after the adjustment is finished to enable the fixing threads to abut against the surface of the top plate to fix the positions of the adjusting rods, the adjusted bristles are fixed, the two second electric push rods are started after the adjustment is finished, the second electric push rods stretch to drive the connected top plate to move along with the movable blocks until the bristles contact the surface of the dies, at this moment, the brush hair that lies in mould top and below all contacts with the surface of mould, close the chamber door, the starter motor, the motor output shaft rotates and drives the connecting rod and rotate along it with it and thereby drive two upper and lower cams and rotate, the cam rotates and simultaneously drive the gyro wheel along its outside, along with the continuous rotation of cam, the one end that the cam kept away from the connecting rod gradually is close with the gyro wheel, thereby drive the gyro wheel and move along with the direction of keeping away from the connecting rod, thereby drive the gyro wheel frame and then drive the inserted bar and move along with it, the inserted bar drives the brush hair on second electric putter and the cleaning device to clean the surface of mould from the back and forth, the inserted bar drives the stopper and moves along with it and compresses first spring, first spring receives the deformation and produces the effort opposite to the stopper motion direction, the compression that the spring received reaches the furthest when the one end that the connecting rod kept away from with the gyro wheel contacts with the rotation of cam, at this moment first spring release effort drives the stopper to be close to the direction motion of cam, thereby drive the inserted bar along with it moves along with the gyro wheel, thereby drive the inserted bar to drive the second electric putter and the surface of mould to clean along with the continuous rotation of cam, thereby realize the brush hair on the back and forth from the front to back and forth on the cleaning device, thereby the reciprocating motion of the mould is realized along with the continuous rotation of cam, thereby the dust collector is inhaled by the dust collector that the inside the dust collector is in the inside that the inside the air duct is located on the surface of the mould and the dust collector that can be cleaned, and the surface is cleaned and the inside the air duct has been cleaned.

The utility model has simple operation, can stably fix moulds with different sizes, can clean the inside, can clean ash in the inside, and simultaneously ensures that the double fixation of the moulds is realized through the matching of the clamping plates and the fastening plates, effectively avoids the situation that the moulds fall off in the cleaning process, can clean the upper surface and the lower surface of the moulds in a reciprocating cycle, increases the dust removal efficiency, can absorb and collect generated dust to avoid the pollution of the dust to the inside of the box body, is convenient for moving according to the needs, and is worthy of popularization and use.

Drawings

FIG. 1 is a schematic diagram of a dust removing apparatus for a cavity of a mold according to the present utility model;

FIG. 2 is a schematic diagram of a right-side cross-sectional structure of a dust removing device for a mold cavity according to the present utility model;

FIG. 3 is a schematic diagram of the front view of the ash removing device for the inner cavity of the mold according to the present utility model;

FIG. 4 is a schematic diagram of a clamping device according to the present utility model;

FIG. 5 is a schematic view of a cleaning apparatus according to the present utility model;

fig. 6 is a schematic view of the bottom structure of the cleaning device according to the present utility model.

In the figure: the cleaning device comprises a box body 1, supporting legs 2, a first electric push rod 3, a clamping device 4, a clamping plate 41, a sliding groove 42, a sliding rod 43, a sliding block 44, a second spring 45, a fastening plate 46, a motor 5, a connecting rod 6, a cam 7, a buffer shell 8, a limiting block 9, a first spring 10, an inserting rod 11, a carrier plate 12, a roller frame 13, a roller 14, a second electric push rod 15, a cleaning device 16, a top plate 161, a movable groove 162, a movable block 163, a movable groove 164, an adjusting rod 165, a fixing nut 166, a ventilation pipe 17, a collecting box 18, a dust collector 19, an air pipe 20, a box door 21, a handle 22, an observation window 23 and a universal wheel 24.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-6, an ash cleaning device for a die cavity comprises a box body 1, wherein supporting legs 2 are fixedly arranged at four corners of the bottom end of the box body 1, universal wheels 24 are fixedly arranged at the bottom ends of the supporting legs 2, and the ash cleaning device can be conveniently moved according to requirements through the universal wheels 24.

The middle parts of the inner walls of the left side and the right side of the box body 1 are transversely and fixedly provided with first electric push rods 3, the opposite ends of the two first electric push rods 3 are fixedly provided with clamping devices 4, each clamping device 4 comprises a clamping plate 41, the outer side of each clamping plate 41 is fixedly connected with one end, far away from the box wall, of each first electric push rod 3, the inner side of each clamping plate 41 is vertically provided with a sliding groove 42, the inner side of each sliding groove 42 is vertically provided with a sliding rod 43, the upper part and the lower part of each sliding rod 43 are respectively sleeved with a second spring 45, the upper part and the lower part of each sliding rod 43 are respectively movably sleeved with a sliding block 44 matched with each sliding groove 42, one end, far away from each sliding block 44, of each sliding block is fixedly connected with one end of each second spring 45, the other end of each second spring 45 is fixedly connected with the groove wall of each sliding groove 42, a fastening plate 46 is fixedly arranged on one side of the sliding block 44 away from the first electric push rod 3, an anti-slip rubber pad is arranged on the inner side of the fastening plate 46, a die is placed between the two clamping plates 41, the two first electric push rods 3 are started, the clamping plates 41 are driven by the first electric push rod 3 to move along with the two first electric push rods, the left side and the right side of the die are clamped and fixed by the two clamping plates 41 which move close to each other, the dies with different widths can be fixed by adjusting the interval between the two clamping plates 41, the fastening plate 46 is contacted with the die when the two clamping plates 41 move close to each other, the die is inserted between the fastening plates 46 on the same side, the two fastening plates 46 on the same side are extruded by the die to move away from each other, the sliding block 44 is driven to move along with the movement of the fastening plates 46 to compress the second spring 45, the second spring 45 is compressed to generate a force opposite to the movement direction of the sliding block 44, so that the two fastening plates 46 can stably clamp the upper side and the lower side of the die, the second spring 45 can be telescopic to enable clamping of dies with different thicknesses to be met, and friction force between the second spring and the dies can be increased through the anti-skid rubber pad to enable clamping of the dies to be stable.

The middle part of the top end of the box body 1 is fixedly provided with a motor 5, the motor 5 is positioned behind the clamping device 4, an output shaft of the motor 5 downwards passes through the top end of the box body 1 to be extended into the interior and fixedly provided with a connecting rod 6, the bottom end of the connecting rod 6 is movably connected with the bottom wall of the box body 1, the upper part and the lower part of the connecting rod 6 are fixedly provided with cams 7, the middle parts of the top wall and the bottom wall of the box body 1 are fixedly provided with buffer shells 8, the buffer shells 8 are positioned in front of the clamping device 4, the interior of the buffer shells 8 is movably provided with a limiting block 9 matched with the inner cavity of the buffer shells, one side of the limiting block 9, far away from the clamping device 4, of the first spring 10, one end, far away from the limiting block 9, is fixedly connected with the inner wall of the buffer shells 8, one end, close to the clamping device 4, of the limiting block 9 is fixedly provided with a inserted link 11, the middle parts of the top wall and the bottom wall of the box body 1 are fixedly provided with a carrier plate 12, the carrier plate 12 is positioned at the rear of the buffer shell 8, the rear end of the inserted link 11 passes through the buffer shell 8 and the carrier plate 12 to be fixedly provided with a roller frame 13, a roller 14 is movably arranged in the roller frame 13, the outer side of the roller 14 is contacted with the surface of the cam 7, the middle part of one side of the inserted link 11, which is close to the clamping device 4, is vertically and fixedly provided with a second electric push rod 15, the opposite ends of the two second electric push rods 15 are fixedly provided with a cleaning device 16, the cleaning device 16 comprises a top plate 161, the middle part of one side of the top plate 161, which is close to the inserted link 11, is fixedly connected with the opposite ends of the second electric push rod 15, the left side and the right side of one end of the top plate 161, which is far away from the inserted link 11, are transversely provided with a movable groove 162, movable blocks 163 are movably arranged in the movable groove 162, the movable blocks 163 and one ends of the top plate 161, which are far away from the inserted link 11, are respectively provided with bristles, the left and right sides of the top plate 161, which is close to one end of the inserting rod 11, are transversely provided with a moving groove 164 communicated with the moving groove 162, one side of the moving block 163, which is close to the moving groove 164, is vertically provided with an adjusting rod 165, one end of the adjusting rod 165, which is far away from the moving block 163, passes through the moving groove 164 and extends to the outside of the top plate 161, is connected with a fixing nut 166 in a threaded manner, the two adjusting rods 165 are pushed to move towards or away from each other, the adjusting rod 165 drives the moving block 163 to move along with the moving rod, so that the connected bristles are driven to move, the reduction and expansion of the bristle range are realized, the bristle range can be adjusted according to the size of a die to be cleaned, and after the adjustment is finished, the fixing screw 166 is rotated to enable the fixing screw 166 to abut against the surface of the top plate 161 to fix the positions of the adjusting rod 165, so that the adjusted bristles are fixed.

The left and right sides of the diapire of box 1 all fixed mounting has ventilation pipe 17, ventilation pipe 17 is located the below of clamping device 4, the top fixed mounting of ventilation pipe 17 has collection box 18, the bottom of collection box 18 is linked together with ventilation pipe 17, the bottom mid-section fixed mounting of box 1 has dust catcher 19, the trachea 20 that is linked together is all installed to the left and right sides of the output of dust catcher 19, the one end that dust catcher 19 was kept away from to trachea 20 is linked together with adjacent ventilation pipe 17 through the bottom of box 1, the front of box 1 has the chamber door 21 with its assorted through hinge movable mounting, the installing port has been seted up at the front middle part of chamber door 21, install with it assorted observation window 23 in the installing port, be convenient for observe the clearance condition of interior mould through observation window 23.

The handle 22 is fixedly arranged in the right side of the front surface of the box door 21.

Working principle: when in use, the die is held between the two clamping plates 41, the two first electric push rods 3 are started, the first electric push rods 3 extend to drive the connected clamping plates 41 to move along with the first electric push rods, the two clamping plates 41 move close to each other to clamp and fix the left side and the right side of the die, the clamping plates 41 move along with the movement of the clamping plates, the two clamping plates 46 positioned on the same side contact the die along with the movement of the clamping plates 41, the die extrudes the two clamping plates 46 to move away from each other until the die is inserted between the two clamping plates 46 to collide with the clamping plates 41, the die is fixed, the clamping plates 46 extrude the clamping plates 46, the clamping plates 46 drive the sliding blocks 44 to move along with the sliding blocks to compress the second springs 45, the second springs 45 generate acting forces opposite to the moving directions of the sliding blocks 44, so that the clamping of the clamping plates 46 to the die is more stable, the fixing of the dies with different widths can be realized by adjusting the distance between the two clamping plates 41, the fixing of the dies with different thicknesses can be adjusted by the contraction of the second spring 45, the fixing of the dies with different thicknesses can be more stable, after the fixing is finished, the two adjusting rods 165 are pushed to move close to or far away from each other, the adjusting rods 165 drive the movable blocks 163 to move along with the movable blocks so as to drive the connected bristles to move, the reduction and expansion of the bristle range are realized, the bristle range can be adjusted according to the size of the die to be cleaned, the fixing threads 166 are rotated to be abutted against the surface of the top plate 161 after the adjustment is finished to fix the positions of the adjusting rods 165, the fixing of the adjusted bristles is realized, the two second electric push rods 15 are started after the fixing is finished, the second electric push rod 15 stretches to drive the connected top plate 161 to move along with the second electric push rod to drive the movable block 163 to move along with the movable block until the bristles contact the surface of the mold, at the moment, the bristles above and below the mold contact the surface of the mold, the door 21 is closed, the motor 5 is started, the output shaft of the motor 5 rotates to drive the connecting rod 6 to rotate along with the upper cam 7 and the lower cam 7, the cam 7 rotates and simultaneously drives the roller 14 to rotate along the outer side of the connecting rod, along with the continuous rotation of the cam 7, one end of the cam 7, which is far away from the connecting rod 6, gradually approaches the roller 14, so as to drive the roller 14 to move along the direction away from the connecting rod 6, so as to drive the roller frame 13 to drive the insert rod 11 to move along with the insert rod 11, the insert rod 11 drives the second electric push rod 15 and the bristles on the cleaning device 16 to clean the surface of the mold from back to front, the insert rod 11 drives the limiting block 9 to move along with the insert rod 9 to compress the first spring 10, the first spring 10 is deformed to generate an acting force opposite to the movement direction of the limiting block 9, when one end of the cam 7 far away from the connecting rod 6 is contacted with the roller 14, the compression of the spring 10 reaches the maximum degree, and the end of the cam 7 far away from the connecting rod 6 is far away from the roller 14, at the moment, the first spring 10 releases the acting force to drive the limiting block 9 to move towards the direction close to the cam 7, so as to drive the inserting rod 11 to move along with the limiting block, the inserting rod 11 drives the second electric push rod 15 and the brush hair on the cleaning device 16 to clean the surface of the mould from front to back, the reciprocating movement of the inserting rod 11 is realized along with the continuous rotation of the cam 7, the brush hair is driven to move along with the reciprocating movement, and the circular cleaning of the surface of the mould is realized, therefore, the upper surface and the lower surface of the die can be cleaned in a reciprocating cycle at the same time, the cleaning efficiency is increased, the dust collector 19 is started, and the dust collector 19 sucks the dust caused by cleaning through the cooperation of the air pipe 20, the ventilation pipe 17 and the collecting box 18, so that the inside of the box body 1 is prevented from being polluted.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (5)

1. The ash cleaning equipment for the inner cavity of the die comprises a box body (1), and is characterized in that supporting legs (2) are fixedly installed at four corners of the bottom end of the box body (1), first electric push rods (3) are transversely and fixedly installed in the middle of the inner walls of the left side and the right side of the box body (1), clamping devices (4) are fixedly installed at opposite ends of the first electric push rods (3), the clamping devices (4) comprise clamping plates (41), one ends, far away from the box wall, of the outer sides of the clamping plates (41) and the first electric push rods (3) are fixedly connected, sliding grooves (42) are vertically formed in the inner sides of the clamping plates (41), sliding rods (43) are vertically installed in the inner sides of the sliding grooves (42), second springs (45) are sleeved on the upper portion and the lower portion of each sliding rod (43), sliding blocks (44) matched with the sliding grooves (42) are movably sleeved between the two second springs (45), one ends, far away from each other, of the sliding blocks (44) are fixedly connected with one end, far away from the adjacent second springs (45), of the sliding rods (45) are fixedly connected with one side of the first electric push rod (5), the top end (46) of the sliding rod (1) is fixedly connected with one end of the sliding rod (46), the motor (5) is positioned at the rear of the clamping device (4), the output shaft of the motor (5) downwards passes through the top end of the box body (1) to be extended to the inside, a connecting rod (6) is fixedly installed, the bottom end of the connecting rod (6) is movably connected with the bottom wall of the box body (1), cams (7) are fixedly installed at the upper part and the lower part of the connecting rod (6), buffer shells (8) are fixedly installed at the middle parts of the top wall and the bottom wall of the box body (1), the buffer shells (8) are positioned in front of the clamping device (4), a limiting block (9) matched with the inner cavity of the buffer shells (8) is movably installed in the buffer shells (8), a first spring (10) is fixedly installed at one side of the limiting block (9) far away from the clamping device (4), one end of the first spring (10) is fixedly connected with the inner wall of the buffer shells (8), a plug rod (11) is fixedly installed at one end of the limiting block (9) close to the clamping device (4), a buffer shell (12) is fixedly installed at the middle part of the top wall and the bottom wall of the box body (1), a buffer carrier plate (12) is fixedly installed at the rear end (12) and penetrates through the buffer carrier plate (12), the inside movable mounting of gyro wheel frame (13) has gyro wheel (14), the outside of gyro wheel (14) contacts with the surface of cam (7), the vertical fixed mounting in middle part that is close to one side of clamping device (4) of inserted bar (11) has second electric putter (15), two the equal fixed mounting of relative one end of second electric putter (15) has cleaning device (16), the equal fixed mounting in left and right sides of diapire of box (1) has ventilation pipe (17), ventilation pipe (17) are located the below of clamping device (4), the top fixed mounting of ventilation pipe (17) has collection box (18), the bottom of collection box (18) is linked together with ventilation pipe (17), the bottom middle part fixed mounting of box (1) has dust catcher (19), the trachea (20) that are linked together are all installed to the left and right sides of the output of dust catcher (19), the one end that the trachea (20) kept away from dust catcher (19) is passed the bottom of box (1) and is linked together with adjacent (17), the top of box (1) is equipped with through hinge (21) in front face-side and the front of the movable box door (21).

2. An ash removal apparatus for a mold cavity according to claim 1, characterized in that the inside of the fastening plate (46) is provided with an anti-slip rubber pad.

3. The ash removal equipment for a die cavity according to claim 1, wherein the cleaning device (16) comprises a top plate (161), one side middle part of the top plate (161) close to the inserted link (11) is fixedly connected with the opposite end of the second electric push rod (15), movable grooves (162) are transversely formed in the left side and the right side of one end of the top plate (161) away from the inserted link (11), movable blocks (163) are movably mounted in the movable grooves (162), bristles are respectively arranged in the movable blocks (163) and one end of the top plate (161) away from the inserted link (11), movable grooves (164) communicated with the movable grooves (162) are transversely formed in the left side and the right side of the top plate (161) close to one end of the inserted link (11), an adjusting rod (165) is vertically mounted on one side of the movable blocks (163) close to the movable grooves (164), and one end of the adjusting rod (165) away from the movable blocks (163) penetrates through the movable grooves (164) to extend to the outside of the top plate (161) to be connected with fixing nuts (166) in a threaded mode.

4. The ash removal device for the inner cavity of the die according to claim 1, wherein a mounting opening is formed in the middle of the front surface of the box door (21), and an observation window (23) matched with the mounting opening is mounted in the mounting opening.

5. The ash removal device for a mold cavity according to claim 1, wherein the bottom ends of the supporting legs (2) are fixedly provided with universal wheels (24).

Images