CN110628965B

CN110628965B - Leather drum

Info

Publication number: CN110628965B
Application number: CN201910895924.5A
Authority: CN
Inventors: 杨旗
Original assignee: Beijing Shulan International Clothing Co ltd
Current assignee: Beijing Shulan International Clothing Co ltd
Priority date: 2019-09-21
Filing date: 2019-09-21
Publication date: 2021-07-06
Anticipated expiration: 2039-09-21
Also published as: CN110628965A

Abstract

The invention discloses a leather drum, which comprises a drum body in a hollow structure and a motor for driving the drum body to rotate, wherein a pair of support frames for supporting the drum body are arranged on two sides of the drum body, and the drum body is rotationally connected with the support frames; the rotary drum body comprises a pair of side plates parallel to each other and a protective mesh cover connected with the two side plates, the protective mesh cover is distributed along the edges of the side plates, the protective mesh cover is a hollow-out cover body which is polygonal and formed by a plurality of metal strips in a crossed mode, and an opening and closing door used for taking and placing leather is arranged on the protective mesh cover. The invention has the advantage that the dust and the scraps falling off from the leather can be conveniently cleaned in the leather falling and softening treatment.

Description

Leather drum

Technical Field

The invention relates to the technical field of leather processing, in particular to a leather rotary drum.

Background

In the field of belt manufacturing, leather is subjected to wet treatment or high-pressure embossing and ironing processes, leather fibers are entangled and wound together, so that the leather becomes stiff in hand feeling, leather factories often place the leather into a rotary drum for softening, and the leather fibers are loosened through rolling, extruding and kneading of the leather in the rotary drum, so that the aim of softening is achieved.

The traditional Chinese invention with the publication number of CN201420822702.3 discloses a leather tumbling treatment drum mechanism with convenient unloading, which comprises an electric control cabinet, a driving motor, a first base, a second base, a first driving arm, a second driving arm and a tumbling drum, wherein the driving motor is assembled in the first base, the electric control cabinet is assembled outside the first base, the driving motor is electrically connected with the electric control cabinet, one end of the first driving arm is fixedly connected with the tumbling drum, the other end of the first driving arm is rotationally connected with the first base and is connected with the driving motor through a transmission belt, one end of the second driving arm is fixedly connected with the tumbling drum, the other end of the second driving arm is rotationally connected with the second base, and a leather inlet and a leather outlet with a cover plate are correspondingly arranged on two sides outside the tumbling drum. The driving motor drives the rotary drum to rotate, so that the leather in the rotary drum is continuously rolled, extruded and kneaded to enable the leather fibers to be loosened, and the purpose of softening is achieved.

The leather is at the in-process that constantly rolls, extrudees, kneads, and the dust sweeps that fall that drop from the leather drops in the rotary drum, and the staff of being inconvenient for clears up the dust sweeps that fall that drop.

Disclosure of Invention

The invention aims to provide a leather rotary drum which has the advantage that dust and scraps falling off from leather can be conveniently cleaned in the process of softening the leather.

The technical purpose of the invention is realized by the following technical scheme:

a leather drum comprises a drum body in a hollow structure and a motor for driving the drum body to rotate, wherein a pair of support frames for supporting the drum body are arranged on two sides of the drum body, and the drum body is rotatably connected with the support frames; the rotary drum body comprises a pair of side plates parallel to each other and a protective mesh cover connected with the two side plates, the protective mesh cover is distributed along the edges of the side plates, the protective mesh cover is a hollow-out cover body which is polygonal and formed by a plurality of metal strips in a crossed mode, and an opening and closing door used for taking and placing leather is arranged on the protective mesh cover.

Through above-mentioned technical scheme, rotate through motor drive rotary drum body to make the leather continuous rotation in the rotary drum, roll, and collide with rotary drum body inner wall, thereby reach the purpose that the leather is softened, the leather is at the in-process of breaking soft, and the dust sweeps that falls that produces is thrown away the rotary drum originally outside from the space of the protection screen panel of fretwork form, thereby is convenient for clear up the dust sweeps that falls.

The invention is further configured to: the outer side frame of the protective mesh enclosure is provided with a bearing cover for bearing dust and waste scraps, the outer side of the protective mesh enclosure is also provided with a pair of fixed frameworks for positioning the bearing cover, and the ground is provided with a fixed frame for fixedly supporting the pair of fixed frameworks.

Through above-mentioned technical scheme, the dirt sweeps that fall that are thrown away from the space of the protection screen panel of fretwork form drop and accept in the cover, avoid the dirt sweeps that fall to drop in the environment, influence environmental quality.

The invention is further configured to: accept the cover and include a pair of first flexible cover and the flexible cover of second that can splice each other and be annular semiannular, the rigid coupling has the fixed plate between a pair of fixed skeleton, first flexible cover one end and the flexible cover one end of second all with the fixed plate rigid coupling, another end of first flexible cover is provided with first magnetic stripe, is provided with the second magnetic stripe of inhaling each other with first magnetic stripe on another end of the flexible cover of second.

Through above-mentioned technical scheme, the staff can with the flexible cover of second pulling towards the direction of keeping away from first magnetic stripe, perhaps with the flexible cover of first pulling towards keeping away from second magnetic stripe direction for first flexible cover and the flexible shrink of the flexible cover of second towards the fixed plate direction, folding, first flexible cover and the flexible cover of second separate, make to open the door and expose, the staff of being convenient for gets and puts the leather.

The invention is further configured to: the first flexible cover and the second flexible cover are formed by connecting a plurality of flexible plates along a wave shape, a sliding groove is formed in the fixed framework, and the side edges of the first flexible cover and the second flexible cover are connected with the sliding groove in a sliding mode.

Through above-mentioned technical scheme, when staff stimulate first flexible cover or the flexible cover of second, adjacent flexbile plate is folding, reduces the length of first flexible cover and the flexible cover of second to be convenient for expose the opening and closing door, the staff of being convenient for gets puts the leather.

The invention is further configured to: the collecting device is arranged on the bearing cover and used for sucking the falling dust and the waste scraps out of the bearing cover, and comprises a collecting box communicated with the bearing cover, an air suction pipe communicated with the collecting box and a fan communicated with the air suction pipe.

Through above-mentioned technical scheme, the ventilation blower will accept the dirt sweeps that fall in the cover and aspirate to the collection box in, be convenient for carry out centralized processing to the dirt sweeps that fall.

The invention is further configured to: the dust filtering device is characterized in that a dust filtering assembly is arranged at the opening of the air suction pipe, the dust filtering assembly comprises a dust filtering cover arranged at the opening of the air suction pipe and a plurality of layers of filtering cloth bags with the pore diameters sequentially reduced, a placing groove is formed in the outer wall of the dust filtering cover, an elastic shell connected with the placing groove in a sliding mode is arranged on the outer side of each filtering cloth bag, and a driving assembly for driving the filtering cloth bags to vibrate is arranged on the inner wall of the collecting box.

Through the technical scheme, the dust falling waste chips sucked into the collection box through the fan are blocked in the collection box by the dust filtering cover, and part of the dust falling waste chips adhered to the filtering cloth bag are brushed into the collection box through the driving assembly.

The invention is further configured to: the driving assembly comprises a first hydraulic cylinder for impacting the elastic shell and a spring which is arranged on one side of the elastic shell, which deviates from the first hydraulic cylinder, and is fixedly connected with the inner wall of the collecting box, and the cylinder body of the first hydraulic cylinder is fixed on the inner wall of the collecting box.

Through the technical scheme, the elastic shell is collided through the extension and retraction of the piston rod of the first hydraulic cylinder, and under the action of the spring, the elastic shell slides up and down in the placing groove, so that the filter cloth bag moves up and down, and dust falling scraps stuck on the filter cloth bag are dusted and fall into the collecting box.

The invention is further configured to: it is a pair of be provided with on the curb plate inner wall and carry out the striking subassembly that strikes to the leather, the striking subassembly is including a plurality of striking post that is used for striking the leather and set up the second pneumatic cylinder that is used for the reciprocal striking leather of drive striking post in the curb plate outside, and the second pneumatic cylinder is fixed on the support frame.

Through above-mentioned technical scheme, the piston rod through the second pneumatic cylinder is flexible, drives striking post reciprocating and strikes the leather to the reinforcing is to the softening of leather.

The invention is further configured to: be equipped with the annular slab on the curb plate lateral wall, the annular slab is located the periphery of dwang, is provided with a plurality of connecting rod on the annular slab, connecting rod one end and annular slab fixed connection, and the other end passes curb plate and striking post fixed connection, and the piston rod and the annular slab of second pneumatic cylinder slide and are connected.

Through above-mentioned technical scheme, because motor drive rotary drum body rotates, through setting up the annular plate of being connected with the curb plate to slide the piston rod of second pneumatic cylinder with the annular and be connected, drive the annular plate when the rotary drum body and rotate the in-process, slide the second pneumatic cylinder of being connected with the annular plate and not rotate along with the annular plate, thereby avoid the second pneumatic cylinder to rotate the influence that causes.

The invention is further configured to: be provided with the T type holding tank that is used for holding the second pneumatic cylinder piston rod on the annular turntable, be provided with the stopper that slides with the holding tank on the second pneumatic cylinder piston rod, the holding tank is including the first holding tank that is used for holding the stopper and the second holding tank that is used for holding the second pneumatic cylinder piston rod, the stopper is contactless with the lateral wall of first holding tank.

Through the technical scheme, the first accommodating groove used for accommodating the limiting block and the second accommodating groove used for accommodating the piston rod of the second hydraulic cylinder are arranged, and the limiting block is not in contact with the side wall of the first accommodating groove, so that the possibility that the second hydraulic cylinder rotates is driven by the annular plate in the sliding process of the piston rod of the second hydraulic cylinder and the annular plate is avoided.

In conclusion, the invention has the following beneficial effects:

1. the protective net cover is hollowed out, so that dust and waste scraps generated by leather can be thrown out of the rotary drum body through the gap of the protective net cover, and the dust and waste scraps are convenient to clean;

2. a receiving cover for receiving dust and waste chips is arranged on the outer side of the protective net cover, and a collecting device is arranged to suck the dust and waste chips into a collecting box from the receiving cover for cleaning;

3. the dust filtering assembly is arranged in the cleaning box, so that dust falling scraps fall into the collecting drawer, and workers can clean the dust falling scraps conveniently;

4. through be provided with the striking subassembly that strikes the leather in the curb plate, strengthen the effect of breaking down soft to the leather.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view showing the structure of the protective guard;

FIG. 3 is a schematic view showing the structure of the connecting column;

FIG. 4 is a schematic view of the construction of the highlighted dust filter assembly;

FIG. 5 is a schematic view highlighting the construction of the filter bag;

FIG. 6 is a schematic view showing the structure of the accommodating groove;

FIG. 7 is a schematic view of the structure of the highlighting impact assembly;

FIG. 8 is an enlarged schematic view of portion A of FIG. 7;

fig. 9 is a schematic structural view for highlighting the stopper.

In the figure, 1, a drum body; 11. a side plate; 111. a reinforcing bar; 12. a protective mesh enclosure; 121. connecting columns; 2. a support frame; 21. a rotating drum; 22. rotating the rod; 23. a motor; 231. a driving gear; 232. a driven gear; 3. a receiving cover; 31. a first flexible cover; 311. a first magnetic stripe; 32. a second flexible cover; 321. a second magnetic stripe; 322. a handle; 4. fixing the framework; 41. a fixed mount; 42. a chute; 43. a fixing plate; 5. a collection device; 51. a collection box; 52. an air suction pipe; 53. a fan; 54. a communicating pipe; 55. a drawer; 6. a dust filtration assembly; 61. a dust filtration cover; 611. a placement groove; 62. a filter cloth bag; 621. an elastic housing; 63. a first hydraulic cylinder; 64. a spring; 7. an impact assembly; 71. an impact post; 711. a protective cylinder; 712. a limiting ring; 72. a second hydraulic cylinder; 721. a limiting block; 8. an annular plate; 81. a connecting rod; 82. accommodating grooves; 821. a first accommodating groove; 822. and a second accommodating groove.

Detailed Description

Example (b): a leather rotary drum, as shown in fig. 1 and 2, comprises a hollow rotary drum body 1 and a motor 23 for driving the rotary drum body 1 to rotate, wherein a pair of support frames 2 for supporting the rotary drum body 1 are arranged on two sides of the rotary drum body 1, and the rotary drum body 1 is rotatably connected with the support frames 2. Wherein, rotary drum body 1 includes a pair of curb plate 11 that are parallel to each other and the protection screen panel 12 of connecting both sides board 11, and protection screen panel 12 distributes along 11 borders of curb plate, is provided with the switching door (not drawn in the picture) of being convenient for get the put leather on the protection screen panel 12, a plurality of spliced pole 121 of fixedly connected with between a pair of curb plate 11, and the connection between a pair of curb plate 11 can be strengthened in the setting of spliced pole 121.

One side that curb plate 11 deviates from protection screen panel 12 is provided with dwang 22, dwang 22 one end and 11 fixed connection of curb plate, be provided with on the support frame 2 with dwang 22 cooperation pivoted rotary drum 21, rotary drum 21 rotates the junction with dwang 22 and is provided with the bearing that is used for reducing wearing and tearing, and fixedly connected with a plurality of and 11 fixed connection's of curb plate stiffener 111 on the dwang 22 outer peripheral face. The motor 23 is fixed on the support frame 2, a driving gear 231 is coaxially and fixedly connected to an output shaft of the motor 23, a driven gear 232 which is engaged with the driving gear 231 in a matching manner is arranged on the rotating rod 22, and the driven gear 232 is coaxially and fixedly connected with the rotating rod 22. The rotating rod 22 is driven to rotate by starting the motor 23, so that the rotary drum body 1 is driven to rotate, leather placed in the rotary drum body 1 continuously rotates, and the leather continuously collides with the inner wall of the rotary drum body 1 in the rotating process, so that the purpose of softening the leather is achieved.

As shown in fig. 2 and 3, the leather is in continuous rotation in the rotary drum body 1, the in-process of overturning, the dust sweeps that fall that produce drops in the rotary drum body 1, the staff's clearance of being not convenient for, in order to facilitate the staff's clearance dust sweeps that fall, set up protective screen 12 into the polygon and by the fretwork form cover body that a plurality of metal strip cross arrangement formed, the leather is in the internal pivoted in-process of rotary drum body 1, the dust sweeps that fall that produce is thrown away from in protective screen 12's the space in the rotary drum body 1.

As shown in fig. 1 and fig. 2, in order to facilitate the collection of the dust-falling scraps thrown out of the drum body 1 by the worker, the dust-falling scraps are prevented from directly falling into the environment, which affects the environmental quality, a receiving cover 3 for receiving the splashing of the dust-falling scraps is erected outside the protective mesh enclosure 12, a pair of fixed frameworks 4 for positioning the receiving cover 3 is further arranged outside the protective mesh enclosure 12, the pair of fixed frameworks 4 are arranged outside the side plate 11, and a fixing frame 41 for fixedly supporting the pair of fixed frameworks 4 is arranged on the ground, and the fixing frame 41 is located below the fixed frameworks 4 and is fixedly connected with the fixed frameworks 4.

Accept cover 3 and include a pair of first flexible cover 31 and the flexible cover 32 that can splice each other and be annular semi-ring shape, first flexible cover 31 tip passes through fixed plate 43 fixed connection with the flexible cover 32 tip of second, and the both sides and a pair of fixed skeleton 4 fixed connection of fixed plate 43, and the first flexible cover 31 other end is provided with first magnetic stripe 311, and the flexible cover 32 of second is provided with the second magnetic stripe 321 of inhaling with the mutual magnetism of first magnetic stripe 311. The first flexible cover 31 and the second flexible cover 32 are formed by connecting a plurality of flexible plates along a wave shape, and the first flexible cover 31 and the second flexible cover 32 are flexible and telescopic and can generate certain elastic deformation.

The pair of fixed frameworks 4 are provided with sliding chutes 42 with opposite openings, and one end parts of the first flexible cover 31 and the second flexible cover 32 are fixed on the fixed frameworks 4 through the fixed plates 43, so that one ends of the first flexible cover 31 and the second flexible cover 32 departing from the fixed plates 43 can slide in the arc-shaped sliding chutes 42. Staff accessible is towards the direction pulling second flexible cover 32 that deviates from first magnetic stripe 311, perhaps is towards the direction pulling first flexible cover 31 that deviates from second magnetic stripe 321, make first flexible cover 31 and the flexible cover 32 of second move in spout 42, make adjacent flexbile plate to fixed plate 43 orientation folding, reduce the length of first flexible cover 31 and the flexible cover 32 of second, thereby make first flexible cover 31 and the flexible cover 32 separation of second, be convenient for get the shutter exposure and put the leather, be provided with the handle 322 that is convenient for the staff pulling on the flexible cover of second.

As shown in fig. 1 and 4, in order to facilitate the workers to clean the dust and the waste in the receiving cover 3, a collecting device 5 for sucking the dust and the waste out of the receiving cover 3 is connected to the receiving cover 3, the collecting device 5 comprises a collecting box 51 connected to the receiving cover 3, an air suction pipe 52 connected to the collecting box 51, and a fan 53 connected to the air suction pipe 52, a communicating pipe 54 is arranged at the bottom of the collecting box 51, the communicating pipe 54 is connected to the receiving cover 3, and the dust and the waste in the receiving cover 3 are sucked out and sucked into the collecting box 51 by the fan 53.

As shown in fig. 4 and 5, the collecting box 51 is further provided with a dust filtering assembly 6, the dust filtering assembly 6 is disposed at the pipe orifice of the air suction pipe 52, the dust filtering assembly 6 includes a dust filtering cover 61 disposed at the pipe orifice of the air suction pipe 52, and a plurality of layers (3 layers in this embodiment) of filtering cloth bags 62 disposed on the dust filtering cover 61, the pore diameters of which are sequentially reduced, and an elastic casing 621 is disposed on the periphery of the filtering cloth bag 62. Referring to fig. 6, the dust filter cover 61 is provided with a placement groove 611, the elastic housing 621 slides up and down in the placement groove 611, the inner wall of the collecting box 51 is provided with a driving assembly for driving the filter cloth bag 62 to vibrate, and the driving assembly comprises a first hydraulic cylinder 63 and a spring 64 arranged on the elastic housing 621. The piston rod of first pneumatic cylinder 63 is used for striking elastic housing 621, the cylinder body of first pneumatic cylinder 63 is fixed on the collecting box 51 inner wall, elastic housing 621 both sides protrusion in dust filter 61, thereby be convenient for the piston rod of first pneumatic cylinder 63 to strike elastic housing 621, spring 64 sets up in elastic housing 621 and deviates from one side of first pneumatic cylinder 63 and with collecting box 51 inner wall fixed connection, collecting box 51 is provided with the collection drawer 55 that is used for accepting the dust waste bits that fall, collect drawer 55 and collecting box 51 sliding connection.

After the leather is softened, the staff closes fan 53, stretch out through the piston rod of first pneumatic cylinder 63, striking elastic housing 621, make elastic housing 621 remove towards spring 64 direction, first elastic housing 621 takes place to be deformed, spring 64 is extruded, when the piston rod of first pneumatic cylinder 63 withdraws, spring 64 resumes initial position, drive elastic housing 621 moves towards keeping away from spring 64 direction, through the flexible of first pneumatic cylinder 63 piston rod, drive elastic housing 621 reciprocating motion in standing groove 611, drive the reciprocating motion of filter cloth bag 62 that sets up in elastic housing 621, thereby to dusting the dust sweeps that falls on the filter cloth bag 62, make the dust sweeps drop fall drop at collection drawer 55, the staff is through drawing out collection drawer 55 from collecting box 51, the staff of being convenient for clears up the dust waste.

As shown in fig. 1 and 3, in order to enhance the effect of breaking down the leather, a striking assembly 7 for enhancing the striking of the leather is provided in the pair of side plates 11, and with reference to fig. 7 and 8, the striking assembly 7 includes a plurality of striking columns 71 for striking the leather and a pair of second hydraulic cylinders 72 disposed outside the side plates 11 for driving the striking columns 71 to strike the leather in a reciprocating manner, and the pair of second hydraulic cylinders 72 are fixed on the support frame 2. In order to avoid the influence that curb plate 11 rotation process caused second pneumatic cylinder 72, be equipped with annular plate 8 on the curb plate 11 lateral wall, annular plate 8 is located the periphery of dwang 22, be provided with a plurality of connecting rod 81 on the annular plate 8, connecting rod 81 one end and annular plate 8 fixed connection, the other end pass curb plate 11 and with striking post 71 fixed connection, leave between annular plate 8 and the curb plate 11 and supply connecting rod 81 gliding space on curb plate 11, the piston rod and the annular plate 8 of second pneumatic cylinder 72 slide to be connected. Referring to fig. 9, an annular accommodating groove 82 for accommodating a piston rod of the second hydraulic cylinder 72 is formed in the annular plate 8, the cross section of the accommodating groove 82 is T-shaped, a piston rod of the second hydraulic cylinder 72 is provided with a limit block 721 sliding in the accommodating groove 82, and the limit block 721 is located in the accommodating groove 82.

Through the flexible of second pneumatic cylinder 72 piston rod, drive stopper 721 towards the 8 directions of annular slab or deviate from 8 directions movements of annular slab, drive annular slab 8 to curb plate 11 or deviate from 11 directions movements of curb plate for striking post 71 is reciprocal in rotary drum body 1 and is strikeed the leather, and the reinforcing is to the effect of breaking soft of leather. And the side of the impact column 71 departing from the connecting rod 81 is set to be an arc surface, so that the damage to leather is reduced. In order to reduce the damage degree to the leather, a protective cylinder 711 for accommodating the connecting rod 81 is fixed on the side plate 11, the protective cylinder 711 is located on the periphery of the connecting rod 81, the impact column 71 slides in the protective cylinder 711, and a limiting ring 712 for limiting the impact column 71 to completely slide out of the protective cylinder 711 is arranged on the impact column 71.

In the rotating process of the drum body 1, the annular plate 8 rotates, and the limit block 721 on the second hydraulic cylinder 72 slides in the annular accommodating groove 82, so that the second hydraulic cylinder 72 does not rotate along with the annular plate 8. The side plate 11 is provided with a T-shaped receiving groove 82 on the rotating annular plate 8, the T-shaped receiving groove 82 includes a first receiving groove 821 for receiving the limiting block 721 and a second receiving groove 822 for receiving the piston rod of the second hydraulic cylinder 72, and the limiting block 721 is not in contact with the side wall of the first receiving groove 821. The side wall contactless of stopper 721 and first holding tank 821 can avoid annular plate 8 at the rotation in-process, and stopper 721 joint reduces the possibility of the motion of second pneumatic cylinder 72 on holding tank 82 inner wall.

The working process is as follows: in the process that the motor 23 drives the rotary drum body 1 to rotate, the generated dust falling scraps are thrown out of the rotary drum body 1 through gaps on the protective mesh enclosure 12 and enter the receiving cover 3, the dust falling scraps in the receiving cover 3 are sucked into the collecting box 51 through the fan 53, the dust falling scraps are accumulated on the filtering cloth bag 62 through the filtering of the dust filtering component 6, then the dust falling scraps of the filtering cloth bag 62 are dusted on the collecting drawer 55 through the extension and retraction of the second hydraulic cylinder 72, finally the collecting drawer 55 is drawn out of the collecting box 51 by a worker, and the dust falling scraps in the collecting drawer 55 are treated, so that the worker can clean the dust falling scraps generated in the leather softening process.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a leather rotary drum, is provided with a pair of support frame (2) that are used for supporting rotary drum body (1) including rotary drum body (1) and drive rotary drum body (1) pivoted motor (23) that are hollow structure rotary drum body (1) both sides, and rotary drum body (1) rotates with a pair of support frame (2) to be connected characterized by: the drum body (1) comprises a pair of side plates (11) which are parallel to each other and a protective mesh enclosure (12) which is connected with the two side plates (11), the protective mesh enclosure (12) is distributed along the edges of the side plates (11), the protective mesh enclosure (12) is polygonal and is a hollow-out cover body formed by a plurality of metal strips in a crossed mode, and an opening and closing door for taking and placing leather is arranged on the protective mesh enclosure (12); a bearing cover (3) for bearing splashing of dust falling scraps is erected on the outer side of the protective net cover (12), a pair of fixed frameworks (4) for positioning the bearing cover (3) are further arranged on the outer side of the protective net cover (12), and a fixing frame (41) for fixedly supporting the fixed frameworks (4) is arranged on the ground; the bearing cover (3) comprises a pair of first flexible covers (31) and a pair of second flexible covers (32) which can be spliced with each other to form a semi-annular shape, a fixing plate (43) is fixedly connected between a pair of fixing frameworks (4), one end parts of the first flexible covers (31) and one end parts of the second flexible covers (32) are fixedly connected with the fixing plate (43), the other end parts of the first flexible covers (31) are provided with first magnetic stripes (311), and the other end parts of the second flexible covers (32) are provided with second magnetic stripes (321) which are magnetically attracted with the first magnetic stripes (311) mutually; the first flexible cover (31) and the second flexible cover (32) are formed by connecting a plurality of flexible plates along a wave shape, a sliding groove (42) is formed in the fixed framework (4), and the side edges of the first flexible cover (31) and the second flexible cover (32) are connected with the sliding groove (42) in a sliding mode; the pair of side plates (11) are provided with impact components (7) for impacting leather on the inner walls, each impact component (7) comprises a plurality of impact columns (71) for impacting the leather and second hydraulic cylinders (72) which are arranged on the outer sides of the side plates (11) and used for driving the impact columns (71) to impact the leather in a reciprocating mode, and the second hydraulic cylinders (72) are fixed on the support frame (2); the side wall of the side plate (11) is provided with an annular plate (8), the annular plate (8) is positioned on the periphery of the rotating rod (22), the annular plate (8) is provided with a plurality of connecting rods (81), one end of each connecting rod (81) is fixedly connected with the annular plate (8), the other end of each connecting rod passes through the side plate (11) and is fixedly connected with the impact column (71), and a piston rod of the second hydraulic cylinder (72) is connected with the annular plate (8) in a sliding manner; annular holding tank (82) that is used for holding second pneumatic cylinder (72) piston rod is provided with on annular board (8), be provided with on second pneumatic cylinder (72) piston rod with holding tank (82) stopper (721) of sliding the connection, holding tank (82) are including first holding tank (821) that are used for holding stopper (721) and second holding tank (822) that are used for holding second pneumatic cylinder (72) piston rod, stopper (721) and the lateral wall contactless of first holding tank (821).

2. A leather drum as in claim 1 wherein: the collecting device (5) for sucking dust and waste scraps out of the bearing cover (3) is arranged on the bearing cover (3) in a communicated mode, and the collecting device (5) comprises a collecting box (51) communicated with the bearing cover (3), an air suction pipe (52) communicated with the collecting box (51) and a fan (53) communicated with the air suction pipe (52).

3. A leather drum as claimed in claim 2 wherein: the dust filtering device is characterized in that a dust filtering component (6) is arranged at the pipe opening of the air suction pipe (52), the dust filtering component (6) comprises a dust filtering cover (61) arranged at the pipe opening of the air suction pipe (52) and a plurality of layers of filtering cloth bags (62) arranged on the dust filtering cover (61) and sequentially reduced in pore size, a placing groove (611) is formed in the outer wall of the dust filtering cover (61), an elastic shell (621) connected with the placing groove (611) in a sliding mode is arranged on the outer side of each filtering cloth bag (62), and a driving component for driving the filtering cloth bags (62) to vibrate is arranged on the inner wall of the collecting box (.

4. A leather drum as claimed in claim 3 wherein: the driving assembly comprises a first hydraulic cylinder (63) for impacting the elastic shell (621) and a spring (64) which is arranged on one side, departing from the first hydraulic cylinder (63), of the elastic shell (621) and fixedly connected with the inner wall of the collecting box (51), and the cylinder body of the first hydraulic cylinder (63) is fixed on the inner wall of the collecting box (51).