CN112025457A

CN112025457A - Multi-environment portable trimming machine and workbench thereof

Info

Publication number: CN112025457A
Application number: CN202011090491.5A
Authority: CN
Inventors: 皮酷
Original assignee: Fuqing Hongyuan Technology Co ltd
Current assignee: Fuqing Hongyuan Technology Co ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2020-12-04

Abstract

The invention discloses a multi-environment portable trimmer and a workbench thereof, which comprise a machine body shell, wherein a motor cavity is arranged in the machine body shell, a motor is arranged in the motor cavity, a trimming cutter head is arranged below the machine body shell, a spraying device is arranged on the motor, and the workbench is arranged below the machine body shell.

Description

Multi-environment portable trimming machine and workbench thereof

Technical Field

The invention relates to the technical field of material processing, in particular to a multi-environment portable trimmer and a workbench thereof.

Background art traditional trimmer is got up and is inconvenient to use, needs the manual tool changing of operator when repairing some special areas (like the hole), wastes time and energy, very big influence work efficiency, moreover, the high-speed processing produces the high temperature environment very big cutter life-span that has reduced, has risen labour cost, when carrying out work such as deburring, burring to the material in addition, can produce a large amount of tiny sweeps, if not clear up in time, then can sneak into in the air harm staff's healthy. The present invention sets forth a device that solves the above problems.

Disclosure of Invention

In order to solve the problems, the embodiment designs a multi-environment portable trimmer and a workbench thereof, which comprises a workbench base, wherein the workbench base is provided with a workbench, the workbench is provided with a support frame, the trimmer is placed on the support frame, the trimmer comprises a machine body shell, a motor cavity is arranged in the machine body shell, the inner wall of the lower side of the machine body shell is fixedly provided with a motor, the motor is provided with a first transmission shaft, the first transmission shaft is provided with a trimming tool bit positioned at the lower side of the machine body shell, the trimming tool bit comprises a first telescopic rod fixedly connected with the first transmission shaft, a cavity is arranged in the first telescopic rod, a threaded shell is fixedly arranged on the inner wall of the lower side of the first telescopic rod, an inner cavity is arranged in the threaded shell, a first threaded groove positioned on the inner wall of the threaded shell is arranged in the inner cavity, a second telescopic rod is arranged on the first sliding groove in a sliding manner, a second sliding groove is formed in the second telescopic rod, the third telescopic rod is connected to the second sliding groove in a sliding manner, a disc is fixedly connected to the lower side of the third telescopic rod, a transition plate is arranged on the lower side of the disc, five friction plates which are distributed in an annular array manner are hinged to the lower side of the transition plate, a first bolt is hinged to each friction plate, the friction plates are rotatably connected with the transition plate through the first bolt, motor cavities are formed in the five friction plates, a motor positioned in each motor cavity is arranged on the lower side of the transition plate, a fourth transmission shaft rotatably connected with the disc is arranged on the motor, a rotating head positioned in the inner cavity is arranged on the upper side of the fourth transmission shaft, the rotating head is rotatably connected with the first thread groove, and a ring is fixedly connected to the lower side of the fourth transmission shaft, the ring is connected with a rotating shaft in a rotating manner, the fan-shaped plate is fixedly connected with the rotating shaft, a sliding groove is formed in the fan-shaped plate, the fan-shaped plate is fixedly connected with the friction plate, the friction plate is connected with a second bolt in the sliding groove in a sliding manner, the second bolt is connected with a fixed ring in a fixed manner, the fixed ring is fixedly connected with the upper side of the fixed ring and is connected with a connecting strip of the transition plate, when the motor is started, the ring can be driven to rotate, the fan-shaped plate can be slowly unfolded under the action of the second bolt, the friction plate can be driven to be opened, the fourth transmission shaft rotates to drive the rotating head to rotate in the threaded shell, the threaded shell can be driven to drive the first telescopic rod to move upwards, and the second telescopic rod can be driven to slide in the first sliding groove, can drive the third telescopic link is in slide in the second spout, can reach the effect of extension, motor chamber upside is equipped with the working chamber, be equipped with sprinkler in the working chamber, sprinkler include with first transmission shaft fixed connection's first bevel gear.

Preferably, the spraying device further comprises second transmission shafts which are positioned on the left side and the right side of the first transmission shaft and are symmetrical with each other, the second transmission shafts which are symmetrical with each other are rotatably connected with the machine body shell, a second bevel gear which is meshed with the first bevel gear is arranged on the second transmission shaft, a first belt pulley is arranged on the second transmission shaft, a third transmission shaft which is positioned in the working cavity and is rotatably connected with the inner wall of the machine body shell is arranged on the upper side of the second transmission shaft, a second belt pulley is arranged on the third transmission shaft, a conveying belt which is connected with the first belt pulley is arranged on the second belt pulley, namely, the second transmission shaft and the third transmission shaft are in transmission connection through the conveying belt, a straight gear is arranged on the right side of the third transmission shaft, the inner wall of the upper side of the machine body shell is provided with a water tank wall which, the water tank wall left and right sides is connected with a ball valve positioned on the upper side of the straight gear in a rotating manner, the ball valve is provided with a rack meshed with the straight gear, a reset spring is arranged between the ball valve and the water tank wall, one side of the ball valve, which is far away from the water tank wall, is provided with a water pipe communicated with the water tank cavity, the water pipe is provided with a water spray head positioned on the outer side of the machine body shell, when the motor is started, the motor can drive the first bevel gear to rotate, the ball valve is opened, the water pipe and the water tank cavity can be communicated, cutting fluid is sprayed on the friction plate through the water spray head, the service life of the friction plate can be prolonged, the upper side of the first bevel gear is provided with a connecting block, the end surface on the upper side of the first transmission shaft is provided with a second thread groove positioned on the upper side of the first bevel, connecting block upside fixedly connected with is located baffle in the water tank, the baffle upside be equipped with engine body shell fixed connection's return spring, the return spring outside is equipped with the rubber sleeve that can prevent the spring and soak, water tank chamber upside is equipped with and is located rubber stopper on the engine body shell, be equipped with the third thread groove on the rubber stopper, work as after the motor starts, can drive first transmission shaft rotates, because the effect of second thread groove can drive connecting block upward movement is right the baffle produces thrust, will be in water tank intracavity produces pressure, is located cutting fluid in the water tank intracavity can pass through the water pipe, follows the sprinkler bead sprays and goes out.

Preferably, the workbench further comprises a recycling cavity positioned in the workbench base, a supporting plate is fixedly connected to the upper side of the workbench base, a filter plate is fixedly connected to the supporting plate, a hydraulic machine fixedly connected with the workbench base is arranged at the rear end of the upper side of the filter plate, a push plate is arranged at the front side of the hydraulic machine, fifteen magnets which are arranged in a rectangular mode are arranged at the lower side of the filter plate, a cleaning box shell which is positioned in the recycling cavity and close to the inner wall of the front side of the workbench base is arranged at the lower side of the filter plate, a cleaning cavity is arranged in the cleaning box shell, fine iron scrap processed by the trimming cutter head falls on the surface of the upper side of the filter plate, and due to the effect of the magnets, the fine iron scrap is adsorbed on the upper side of the magnets, and due to the filtering effect of the filter plate, clean cutting fluid falls into the, after finishing trimming and cleaning, starting the hydraulic press, pushing the push plate forwards to push small iron chips on the surface of the upper side of the filter plate to the upper side of the cleaning box shell, and finally falling into the cleaning cavity to wait for cleaning.

The invention has the beneficial effects that: according to the gear transmission principle and the connecting rod principle, the edge trimmer can be correspondingly adjusted in different environments, and can be used for trimming and polishing special environments such as holes and the like, so that the time required by tool changing is greatly saved, the trimming and processing efficiency is improved, furthermore, the device for spraying the cutting fluid is designed by utilizing the gear transmission principle, the service life of the trimming cutter can be prolonged, the cost is reduced, and the tiny scrap iron generated by trimming can be collected to prevent the scrap iron from being mixed into air to cause harm to the health of workers.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall construction of a multi-environment portable edger and its table of the present invention;

FIG. 2 is a detailed schematic view of the edger of FIG. 1;

FIG. 3 is a detailed schematic view of the deburring tool tip of FIG. 2;

FIG. 4 is a schematic view of the structure in the direction "A-A" of FIG. 3;

FIG. 5 is a schematic view of the expanded shape of FIG. 4;

FIG. 6 is a schematic structural view of the workbench of FIG. 1;

fig. 7 is a schematic view of the structure in the direction "B-B" of fig. 6.

Detailed Description

The invention will now be described in detail with reference to fig. 1-7, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a multi-environment portable trimmer and a workbench thereof, which are mainly applied to the deburring process of workpieces, and the invention is further explained by combining the attached drawings of the invention: the multi-environment portable trimmer and the workbench thereof comprise a workbench base 44, wherein the workbench base 44 is provided with a workbench 903, the workbench 903 is provided with a support frame 74, the trimmer is placed on the support frame 74, the trimmer comprises a machine body shell 11, a motor cavity 12 is arranged in the machine body shell 11, a motor 13 is fixedly arranged on the inner wall of the lower side of the motor cavity 12, the motor 13 is provided with a first transmission shaft 14, the first transmission shaft 14 is provided with a trimmer head 901 positioned on the lower side of the machine body shell 11, the trimmer head 901 comprises a first telescopic rod 58 fixedly connected with the first transmission shaft 14, a cavity 60 is arranged in the first telescopic rod 58, a threaded shell 66 is fixedly arranged on the inner wall of the lower side of the first telescopic rod, an inner cavity 62 is arranged in the threaded shell 66, and a first threaded groove 65 positioned on the inner wall of the threaded shell 66 is arranged in the inner cavity 62, the inner wall of the first telescopic rod 58 is provided with a first sliding groove 59, the first sliding groove 59 is provided with a second telescopic rod 56 in a sliding manner, the second telescopic rod 56 is provided with a second sliding groove 57, the second sliding groove 57 is connected with a third telescopic rod 55 in a sliding manner, the lower side of the third telescopic rod 55 is fixedly connected with a disc 37, the lower side of the disc 37 is provided with a transition plate 38, the lower side of the transition plate 38 is hinged with five friction plates 36 distributed in an annular array manner and the 55-bit circle center of the third telescopic rod, the friction plates 36 are hinged with a first bolt 39, the friction plates 36 and the transition plate 38 are rotatably connected through the first bolt 39, five friction plates 36 are internally provided with a motor cavity 67, the lower side of the transition plate 38 is provided with a motor 40 positioned in the motor cavity 67, the motor 40 is provided with a fourth transmission shaft 41 rotatably connected with the disc 37, the 41 upside of fourth transmission shaft is equipped with and is located rotation head 61 in inner chamber 62, it 61 to rotate first thread groove 65 rotates and connects, 41 downside fixedly connected with ring 32 of fourth transmission shaft, the rotationally connected with axis of rotation 42 under the ring 32, fixedly connected with fan board 33 under the axis of rotation 42, be equipped with spout 34 on the fan board 33, fan board 33 with friction plate 36 fixed connection, sliding connection is located second bolt 35 in spout 34 under the friction plate 36, fixedly connected with fixed ring 68 under the second bolt 35, fixed ring 68 upside fixedly connected with cross cab apron 38 fixed connection's connecting strip 43, work as when motor 40 starts, can drive ring 32 rotates, can drive fan board 33 rotates, fan board 33 is in slowly expand under the effect of second bolt 35, the friction plate 36 can be driven to open, the fourth transmission shaft 41 rotates to drive the rotating head 61 to rotate in the threaded shell 66, so that the threaded shell 66 drives the first telescopic rod 58 to move upwards, the second telescopic rod 56 can be driven to slide in the first sliding groove 59, the third telescopic rod 55 can be driven to slide in the second sliding groove 57, and an extending effect can be achieved, the working cavity 15 is arranged on the upper side of the motor cavity 12, the spraying device 902 is arranged in the working cavity 15, and the spraying device 902 comprises a first bevel gear 16 fixedly connected with the first transmission shaft 14.

Beneficially, the spraying device 902 further includes second transmission shafts 18 symmetrically located at the left and right sides of the first transmission shaft 14, the second transmission shafts 18 symmetrically located at the left and right sides of the machine body housing 11 are rotatably connected to each other, the second transmission shafts 18 are provided with second bevel gears 17 engaged with the first bevel gears 16, the second transmission shafts 18 are provided with first pulleys 19, the upper side of the second transmission shafts 18 is provided with third transmission shafts 21 located in the working chamber 15 and rotatably connected to the inner wall of the machine body housing 11, the third transmission shafts 21 are provided with second pulleys 22, the second pulleys 22 are provided with transmission belts 20 connected to the first pulleys 19, that is, the second transmission shafts 18 and the third transmission shafts 21 are in belt transmission connection through the transmission belts 20, the right side of the third transmission shafts 21 is provided with straight gears 23, the inner wall of the upper side of the machine body housing 11 is provided with water tank walls 69 located in the working chamber 15, be equipped with water tank chamber 27 in the water tank wall 69, the water tank wall 69 left and right sides is rotated and is connected with and is located the ball valve 24 of straight-teeth gear 23 upside, be equipped with on the ball valve 24 with 23 meshed racks, ball valve 24 with be equipped with reset spring 25 between the water tank wall 69, ball valve 24 keeps away from one side of water tank wall 69 be equipped with the communicating water pipe 26 in water tank chamber 27, be equipped with on the water pipe 26 and be located the sprinkler bead 63 in the engine body shell 11 outside, work as when motor 13 starts, can drive first bevel gear 16 rotates, through gear drive and belt drive, ball valve 24 is opened, can switch on water pipe 26 with water tank chamber 27, the cutting fluid passes through sprinkler bead 63 sprays on the friction plate 36, can prolong the life-span of friction plate 36, first bevel gear 16 upside is equipped with connecting block 31, be equipped with on the first transmission shaft 14 upside terminal surface and be located the second thread groove of first bevel gear 16 upside 30, the connecting block 31 is rotatably connected with the second thread groove 30, a baffle 28 positioned in the water tank 27 is fixedly connected with the upper side of the connecting block 31, a return spring 29 fixedly connected with the machine body shell is arranged on the upper side of the baffle 28, a rubber sleeve 73 capable of preventing the spring from soaking is arranged on the outer side of the return spring, the upper side of the water tank cavity 27 is provided with a rubber plug 53 positioned on the machine body shell 11, the rubber plug 53 is provided with a third thread groove 70, and after the motor 13 is started, the first transmission shaft 14 is driven to rotate, and due to the action of the second thread groove 30, the connecting block 31 is driven to move upwards and generate thrust on the baffle 28, so that pressure is generated in the water tank cavity 27, and the cutting fluid in the water tank cavity 27 can pass through the water pipe 26 and be sprayed from the water spray head 63.

Beneficially, the workbench 903 further comprises a recycling cavity 50 located in the workbench base 44, a supporting plate 45 is fixedly connected to the upper side of the workbench base 44, a filter plate 46 is fixedly connected to the supporting plate 45, a hydraulic press 52 fixedly connected to the workbench base 44 is arranged at the rear end of the upper side of the filter plate 46, a push plate 47 is arranged at the front side of the hydraulic press 52, fifteen magnets 49 arranged in a rectangular shape are arranged at the lower side of the filter plate 46, a cleaning box shell 71 located in the recycling cavity 50 and close to the inner wall of the front side of the workbench base 44 is arranged at the lower side of the filter plate 46, a cleaning cavity 48 is arranged in the cleaning box shell 71, fine iron scraps processed by the trimming blade 901 fall on the upper surface of the filter plate 46, and due to the effect of the magnets 49, the fine iron scraps are adsorbed on the upper side of the magnets 49, due to the filtering effect of the filter plate 46, clean cutting fluid falls into the recovery cavity 50 to wait for recovery, after finishing trimming and cleaning, the hydraulic press 52 is started, the push plate 47 is pushed forwards, so that fine scrap iron on the upper side surface of the filter plate 46 can be pushed to the upper side of the cleaning box shell 71 and finally falls into the cleaning cavity 48 to wait for cleaning.

The steps of using a multi-environment portable edger and its table herein are described in detail with reference to FIGS. 1-7: initially, the opening of the water tank cavity 27 can be opened by rotating the rubber plug 53, after cutting fluid is injected into the water tank cavity 27, the rubber plug 53 is closed, and the machine body shell 11 can be started to work; during trimming, the motor 13 is started, the first transmission shaft 14 rotates to drive the first telescopic rod 58 to rotate, the second telescopic rod 56 can be driven to rotate, the third telescopic rod 55 rotates to drive the disc 37 to rotate, the friction plate 36 can be driven to rotate, the friction plate 36 is aligned to a position needing trimming and deburring, burrs can be cut off and ground off, the first transmission shaft 14 rotates to drive the first bevel gear 16 to rotate, the second bevel gear 17 meshed with the first bevel gear 16 also rotates to drive the second transmission shaft 18 to rotate, the third transmission shaft 21 can be driven to rotate by a belt transmission principle, the straight gear 23 positioned on the lower side of the ball valve 24 rotates, the ball valve 24 can be driven to rotate by the meshing of the straight gear 23 and a rack on the ball valve, the water tank cavity 27 is communicated with the water pipe 26, the first transmission shaft 14 rotates to drive the connecting block 31 to move upwards, and the baffle 28 can be driven to move, thrust is generated on the wall 69 of the water tank, pressure is generated in the water tank cavity 27, cutting fluid stored in the water tank cavity 27 passes through the ball valve 24, enters the water pipe 26 and is finally sprayed onto the friction plate 36 from the water spray head 63, the temperature on the friction plate 36 can be reduced, the service life of a cutter can be prolonged, after the cutting fluid is used, the motor 13 is turned off, the baffle 28 moves downwards under the action of the return spring 29, the first transmission shaft 14 stops rotating, the ball valve 24 reversely turns to close a connecting channel between the water tank cavity 27 and the water pipe 26 under the action of the return spring 25, and the water tank cavity 27 is closed, so that the spraying of the cutting fluid can be stopped; when the hole and other special environments are trimmed, the motor 40 is started, the fourth transmission shaft 41 rotates to drive the circular ring 32 to rotate, the fan-shaped plate 33 is driven to rotate, the second bolt 35 slides in the sliding groove 34, the five friction plates 36 with the fourth transmission shaft 41 as the center are opened, the fourth transmission shaft 41 rotates to drive the rotating head 61 to rotate, the third telescopic rod 55 is driven to move downwards due to the downward movement of the first thread groove 65, the third telescopic rod 55 is driven to slide in the second sliding groove 57, the second telescopic rod 55 is driven to slide in the first sliding groove 59, the second telescopic rod 56 and the first telescopic rod 58 which are positioned at the outer side of the third telescopic rod 55 move downwards, the extending effect can be achieved, the extended third telescopic rod 55 extends into the hole, the hole and other special environments can be trimmed, scrap iron is generated by trimming, and falls on the filter plate 46, sucked by a magnet 49 arranged on the lower side of the filter plate 46, and accumulated into deposits, and the cutting fluid falls into a recovery cavity 50 through the filtration of the filter plate 46 to wait for recovery; when the cleaning is finished, the motor 13 is turned off, the first transmission shaft 14 stops rotating, the trimming work stops, the hydraulic machine 52 is started, the push plate 47 is pushed forwards, the small iron scrap piles sucked and gathered on the upper side of the magnet 49 can be pushed to the upper side of the cleaning box shell 71, and finally fall into the cleaning cavity 48 to wait for cleaning by workers.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a portable trimmer of multiple environment and workstation thereof, includes the workstation base, be equipped with the workstation on the workstation base, be equipped with support frame, its characterized in that on the workstation: the trimming machine is placed on the supporting frame and comprises a machine body shell, a motor cavity is arranged in the machine body shell, a lower inner wall is fixedly arranged on the motor, a first transmission shaft is arranged on the motor, a trimming tool bit positioned on the lower side of the machine body shell is arranged on the first transmission shaft, the trimming tool bit comprises a first telescopic rod fixedly connected with the first transmission shaft, a cavity is arranged in the first telescopic rod, a threaded shell is fixedly arranged on the inner wall of the lower side of the first telescopic rod, an inner cavity is arranged in the threaded shell, a first threaded groove positioned on the inner wall of the threaded shell is arranged in the inner cavity, a first sliding groove is arranged on the inner wall of the first telescopic rod, a second telescopic rod is arranged on the first sliding groove in a sliding manner, a second sliding groove is arranged on the second telescopic rod, a third telescopic rod is connected on the second sliding groove in a sliding, the lower side of the disc is provided with a transition plate, the lower side of the transition plate is hinged with five friction plates distributed in an annular array mode by the aid of the circle center of the third telescopic rod, a first bolt is hinged on each friction plate, the friction plates are rotationally connected with the transition plate through the first bolt, a motor cavity is arranged in each five friction plates, the lower side of the transition plate is provided with a motor positioned in the motor cavity, the motor is provided with a fourth transmission shaft rotationally connected with the disc, the upper side of the fourth transmission shaft is provided with a rotating head positioned in the inner cavity, the rotating head is rotationally connected with the first thread groove, the lower side of the fourth transmission shaft is fixedly connected with a ring, the ring is rotationally connected with a rotating shaft, the rotating shaft is fixedly connected with a fan-shaped plate, the fan-shaped plate is provided with a sliding groove, and the fan-shaped plate is fixedly connected with the friction plates, the friction plate is slidably connected with a second bolt in the sliding groove, a fixed ring is fixedly connected with the lower portion of the second bolt, the upper side of the fixed ring is fixedly connected with a connecting strip fixedly connected with the transition plate, a working cavity is formed in the upper side of the motor cavity, a spraying device is arranged in the working cavity, and the spraying device comprises a first bevel gear fixedly connected with the first transmission shaft.

2. A multi-environment portable edger and its table as defined in claim 1, wherein: the spraying device also comprises second transmission shafts which are positioned on the left side and the right side of the first transmission shaft and are symmetrical mutually, the second transmission shafts which are symmetrical mutually are connected with the machine body shell in a rotating way, the second transmission shafts are provided with second bevel gears which are connected with the first bevel gears in a meshing way, the second transmission shafts are provided with first belt pulleys, the upper sides of the second transmission shafts are provided with third transmission shafts which are positioned in the working cavity and are connected with the inner wall of the machine body shell in a rotating way, the third transmission shafts are provided with second belt pulleys, the second belt pulleys are provided with conveyor belts which are connected with the first belt pulleys, namely, the second transmission shafts and the third transmission shafts are connected through the conveyor belts in a transmission way, the right sides of the third transmission shafts are provided with straight gears, the inner wall on the upper side of the machine body shell is provided with water tank, the water tank wall left and right sides are rotatably connected with ball valves positioned on the upper sides of the straight gears, the ball valves are provided with racks meshed with the straight gears, reset springs are arranged between the ball valves and the water tank wall, one side, away from the water tank wall, of each ball valve is provided with a water pipe communicated with the water tank cavity, the water pipe is provided with a water spray head positioned on the outer side of the machine body shell, the upper side of the first bevel gear is provided with a connecting block, the end face of the upper side of the first transmission shaft is provided with a second thread groove positioned on the upper side of the first bevel gear, the connecting block is rotatably connected with the second thread groove, the upper side of the connecting block is fixedly connected with a baffle positioned in the water tank, the upper side of the baffle is provided with a return spring fixedly connected with the machine body shell, the outer side of the return spring is provided with a rubber, and a third thread groove is formed in the rubber plug.

3. A multi-environment portable edger and its table as defined in claim 1, wherein: the workstation is still including being located the recovery chamber in the workstation base, workstation base upside fixedly connected with backup pad, fixedly connected with filter in the backup pad, filter upper side rear end be equipped with workstation base fixed connection's hydraulic press, the hydraulic press front side is equipped with the push pedal, the filter downside is equipped with fifteen magnets that the rectangle was arranged, the filter downside is equipped with and is located retrieve the intracavity and be close to the clearance case and shell of workstation base front side inner wall, be equipped with the clearance chamber in the clearance case and shell.