CN111231090A

CN111231090A - Full-automatic efficient evaporates presses aerated concrete block shedder

Info

Publication number: CN111231090A
Application number: CN202010061284.0A
Authority: CN
Inventors: 宿育铭; 李明
Original assignee: Huizhou Xinye Building Materials Co Ltd
Current assignee: Huizhou Xinye Building Materials Co Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-06-05
Anticipated expiration: 2040-01-19
Also published as: CN111231090B

Abstract

The invention relates to a full-automatic and efficient autoclaved aerated concrete block demoulding device, and belongs to the technical field of aerated brick production equipment. The method comprises the following steps: the automatic clamping device comprises a rack, a walking trolley arranged at the top of the rack and supporting frames which are arranged at the bottom of the rack and are parallel to each other, wherein a positioning mechanism used for automatically positioning the walking trolley is arranged at the top of the rack, a clamping mechanism used for clamping a mold is arranged between the supporting frames, and a driving mechanism used for driving the clamping mechanism to slide along the vertical direction is arranged at the top of the rack. The automatic positioning device can realize automatic and accurate positioning, so that the clamping mechanism can accurately find the position of the mold, and the time for the clamping mechanism to find the mold is greatly reduced.

Description

Full-automatic efficient evaporates presses aerated concrete block shedder

Technical Field

The invention relates to the technical field of aerated brick production equipment, in particular to a full-automatic and efficient autoclaved aerated concrete block demoulding device.

Background

The aerated brick is an aerated concrete block produced by a high-temperature autoclaved equipment process. "aerated brick" is to be understood as a simplified or generic term. The range of products covered by the brick is a little larger, namely, the brick products produced by other various processes including autoclaving. In the production process of the aerated brick, after the aerated concrete is poured and statically stopped for forming, the whole mould needs to be lifted and turned over to complete demoulding.

The existing positioning mode is generally characterized in that the positioning mode is gradually finely adjusted after the positioning mode is manually controlled to move to an approximate position, so that a die filled with a finished blank can be lifted, turned over and demoulded. However, the manual positioning of the staff can cause that the positioning is not accurate enough in the positioning process, the workload of the staff is greatly increased, time and labor are wasted, and the further improvement is needed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the full-automatic and efficient autoclaved aerated concrete block demoulding device which can automatically and accurately position and automatically grab a hook of a mould, has better balance, greatly reduces the workload of workers and saves time and labor.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a full-automatic efficient evaporates presses aerated concrete block shedder, includes: the automatic clamping device comprises a rack, a walking trolley arranged at the top of the rack and supporting frames which are arranged at the bottom of the rack and are parallel to each other, wherein a positioning mechanism used for automatically positioning the walking trolley is arranged at the top of the rack, a clamping mechanism used for clamping a mold is arranged between the supporting frames, and a driving mechanism used for driving the clamping mechanism to slide along the vertical direction is arranged at the top of the rack.

By adopting the technical scheme, automatic and accurate positioning can be realized, so that the clamping mechanism can accurately find the position of the mold, and the time for the clamping mechanism to find the mold is greatly reduced; moreover, the whole process can replace manual work to be carried out in an automatic mode, so that the workload of workers is greatly reduced, and the labor is saved; in addition, the whole process is simple in operation, convenient to use and high in automation degree, productivity is greatly improved, safety is high, and safety of workers can be guaranteed.

The present invention in a preferred example may be further configured to: the positioning mechanism includes: the positioning block connected to one side of the frame facing outwards in a sliding mode along the horizontal direction is arranged in the placing groove in the top of the positioning block, the frame is arranged on two sides of the frame facing outwards and used for driving the driving assembly of the positioning block, the first driving piece is vertically installed on one side of the walking trolley facing outwards, and the positioning assembly is installed on the output shaft of the first driving piece.

Through adopting above-mentioned technical scheme, set up positioning mechanism, can carry out accurate location to the mould with automatic mode to great reduction press from both sides the time of getting the mould of getting the mechanism, practiced thrift the time, improved productivity ratio.

The present invention in a preferred example may be further configured to: the drive assembly includes: the setting is in the frame is towards outside one side, and the pivot that is parallel to each other, fixes the sprocket of frame one end is kept away from in the pivot, sets up the frame is towards outside one side, and with sprocket engaged with chain, install one of them the second driving piece of frame one end is kept away from in the pivot.

Through adopting above-mentioned technical scheme, set up drive assembly, can adjust the position that the locating piece was preset with automatic mode to can fix a position the mould that sets up different positions in the mill, thereby improved shedder's commonality.

The present invention in a preferred example may be further configured to: the positioning assembly comprises: install the frame is towards the fixed block on outside one side, sets up on the fixed block, and supply the through-hole that first driving piece output shaft passed, install the support at fixed block top articulates on the support, and with first driving piece output shaft looks articulated connecting rod, install frame one end is kept away from to the connecting rod, and with standing groove matched with locking piece.

Through adopting above-mentioned technical scheme, set up locating component, can will violently walk the dolly with automatic mode and fix on the locating piece, also can be with firm the fixing on the locating piece of walking dolly simultaneously, avoided the walking dolly to take place the condition that the position removed in the frame, whole process goes on with automatic mode moreover, simple, high efficiency, convenient to use.

The present invention in a preferred example may be further configured to: the clamping mechanism comprises: slide along vertical direction and connect and be in removal frame between the support frame is installed remove frame both ends, and the fixed column that is parallel to each other articulates the fixed column is kept away from the clamp that removes frame one end and is got the subassembly, sets up remove frame one side, be used for the drive clamp to get the rotatory drive assembly of subassembly.

Through adopting above-mentioned technique, set up to press from both sides and get the mechanism, can replace the staff to press from both sides the mould of waiting to transport with automatic mode and get to great reduction staff's work load, practiced thrift the time, improved productivity ratio, labour saving and time saving.

The present invention in a preferred example may be further configured to: the clamping assembly comprises: the clamping and taking device comprises a rotating shaft, a clamping and taking plate, a hook groove, a lifting hook, a supporting rod and a third driving piece, wherein the rotating shaft is installed on the opposite side of the fixed column, the clamping and taking plate is rotatably connected to the rotating shaft, the hook groove is formed in the clamping and taking plate and used for hooking a mold, the groove is formed in the clamping and taking plate, the lifting hook is hinged to the clamping and taking plate, placed in the groove and matched with the hook groove, one end of the supporting rod is hinged to the top of the clamping and taking plate, one end of the supporting rod is hinged to the lifting hook, and one end.

Through adopting above-mentioned technical scheme, set up to press from both sides and get the subassembly, can get the mechanism with firm fixing of mould on pressing from both sides to the effectual in-process of avoiding carrying, the condition that the mould dropped appears has ensured staff's safety.

The present invention in a preferred example may be further configured to: the drive assembly includes: the clamping assembly comprises a connecting frame, a fixed column and a fourth driving piece, wherein the connecting frame is arranged on one side of the moving frame, the fixed column is arranged on the clamping assembly, and the fourth driving piece is hinged to the connecting frame and is provided with one end connected with one end of the fixed column.

Through adopting above-mentioned technical scheme, set up drive assembly, can overturn the mould with automatic mode to can pour out the finished product blank in the mould from the mould, and then great saving the manpower, improved productivity ratio.

The present invention in a preferred example may be further configured to: the drive mechanism includes: the clamping mechanism comprises a fifth driving part arranged at the top of the rack, a single-grooved wheel arranged on an output shaft of the fifth driving part, a pulley arranged on the clamping mechanism, a steel wire rope with one end fixed on the single-grooved wheel and surrounding the pulley, and a guide assembly arranged on one side of the clamping mechanism.

Through adopting above-mentioned technical scheme, set up actuating mechanism, can adjust the lift of getting the subassembly with automatic mode to the mechanism is got to the clamp of mould is got to convenient clamp, easy operation moreover, convenient to use.

The present invention in a preferred example may be further configured to: the guide assembly includes: the clamping mechanism comprises a clamping mechanism, a support block, rollers and a long block, wherein the clamping mechanism is arranged on the support block, the support block is arranged on one side of the clamping mechanism and is parallel to the clamping mechanism, the rollers are arranged on the support block, and the long block is arranged on two sides of the support frame and is used for the rollers to slide.

Through adopting above-mentioned technical scheme, set up the direction subassembly, have the effect of direction to the lift of pressing from both sides the mechanism of getting to ensure that the mechanism can go up and down according to the track that the preset is good, guarantee the smooth completion of whole process of drawing of patterns.

The present invention in a preferred example may be further configured to: one side of getting the mechanism is provided with first drive assembly: the first drive assembly includes: the clamping mechanism comprises a sixth driving piece horizontally arranged on the clamping mechanism, a locking rod arranged on an output shaft of the sixth driving piece, a moving frame arranged at one end, far away from the sixth driving piece, of the locking rod, a seventh driving piece arranged on the moving frame, and a threaded rod arranged on an output shaft of the seventh driving piece.

Through adopting above-mentioned technical scheme, set up first drive assembly, can be after drawing of patterns work is accomplished, can be in the same place shedder is fixed with the mould that has already been demolded in automated mode to make shedder can carry other stations with the mould.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the automatic positioning device can realize automatic and accurate positioning, so that the clamping mechanism can accurately find the position of the mold, and the time for the clamping mechanism to find the mold is greatly reduced;

2. the clamping mechanism is arranged, so that a mold to be transported can be clamped in an automatic mode instead of a worker, the workload of the worker is greatly reduced, the time is saved, the production efficiency is improved, and the time and the labor are saved;

3. the driving mechanism is arranged, so that the lifting of the clamping assembly can be controlled in an automatic mode, the clamping mechanism can clamp the mold conveniently, and the operation is simple and the use is convenient;

4. the first driving assembly is arranged, so that after the demolding work is completed, the demolding device and the mold which is demolded completely can be fixed together in an automatic mode, and therefore the mold can be conveyed to other stations.

Drawings

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

FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;

FIG. 3 is an enlarged partial schematic view of portion B of FIG. 1;

FIG. 4 is an enlarged partial schematic view of portion C of FIG. 1;

fig. 5 is a partially enlarged schematic view of a portion D in fig. 1.

Reference numerals: 1. a frame; 2. a walking trolley; 3. a support frame; 111. positioning blocks; 112. a placement groove; 211. a rotating shaft; 212. a sprocket; 213. a chain; 311. a fixed block; 313. a support; 314. a connecting rod; 315. a locking block; 411. a movable frame; 412. fixing a column; 511. a rotating rod; 512. clamping the plate; 513. hooking a groove; 514. a groove; 515. a hook; 516. a support bar; 611. a connecting frame; 612. a cylinder; 711. a single sheave; 712. a pulley; 714. a wire rope; 811. mounting blocks; 812. a support block; 813. a roller; 814. a long bar block; 911. a locking lever; 912. a moving block; 913. a threaded rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the invention discloses a full-automatic high-efficiency autoclaved aerated concrete block demoulding device, which comprises: the walking trolley comprises a rack 1 and a walking trolley 2 arranged at the top of the rack 1, wherein the walking trolley 2 can slide along the extending direction of the rack 1; and the bottom of the frame 1 is provided with two supporting frames 3, and the supporting frames 3 between two adjacent supporting frames are parallel to each other.

The top of the frame 1 is provided with a positioning mechanism which can realize automatic and accurate positioning of the walking trolley 2.

In this embodiment, the positioning assembly includes: the positioning blocks 111 are slidably connected to the frame 1 toward the outside, the positioning blocks 111 can slide along the extending direction of the frame 1, and the number of the positioning blocks 111 is two and is parallel to each other. Meanwhile, a driving assembly is arranged on one side of the frame 1 facing outwards, and the driving assembly can drive the positioning block 111 to slide.

In this embodiment, the driving assembly includes: and two rotating shafts 211 are arranged on one side of the frame 1 facing outwards, the rotating shafts 211 are parallel to each other, and the rotating shafts 211 rotate around the frame 1. And two chain wheels 212 are arranged at one end of the rotating shaft 211 far away from the frame 1. A chain 213 is engaged with the sprocket 212. Meanwhile, a second driving assembly is installed at one end, far away from the rack 1, of the rotating shaft 211, wherein the second driving assembly can be a motor, and the second driving assembly can be a motor and can drive the rotating shaft 211 fixed with the motor output shaft to rotate through the rotation of the motor output shaft, so that the second driving assembly can drive the chain wheel 212 to rotate, and further can drive the chain 213 meshed with the chain wheel 212 to move linearly, so that the position of the positioning block 111 can be adjusted, and the preset position of the positioning block 111 can be adjusted in an automatic mode. The positioning of the molds at different positions is realized by changing the position of the positioning block 111.

In addition, a placing groove 112 is formed in the top of the positioning block 111, and a first driving assembly is vertically installed on one outward side of the traveling trolley 2, wherein the first driving assembly can be an air cylinder, a positioning assembly is installed on a piston rod of the air cylinder, the positioning assembly is arranged, the traveling trolley 2 can be fixed on the positioning block 111 in an automatic mode, and it is ensured that the positioned position cannot be changed.

In this embodiment, referring to fig. 2, the positioning assembly includes: a fixing block 311 is installed on one side of the walking trolley 2 facing outwards, a through hole is formed in the fixing block 311, and a piston rod of the air cylinder can penetrate through the through hole. Meanwhile, a support 313 is mounted on a bearing surface of the fixing block 311, a connecting rod 314 is hinged to the support 313, one end, far away from the support 313, of the connecting rod 314 is hinged to a piston rod of the air cylinder, a locking block 315 is mounted at the other end of the connecting rod 314, the locking block 315 is matched with the placing groove 112, and reciprocating motion of the piston rod of the air cylinder is utilized to drive the connecting rod 314 to reciprocate, so that the locking block 315 can be driven to be placed in the placing groove 112, and automatic positioning of the walking trolley 2 can be achieved.

Simultaneously, be provided with between support frame 3 and press from both sides and get the mechanism, press from both sides and get the mechanism and can press from both sides the mould with automatic mode and get to great reduction staff's work load, labour saving and time saving.

In this embodiment, press from both sides and get mechanism and include: the removal frame 411 of sliding connection between support frame 3, the extension direction that removes frame 411 can follow support frame 3 slides, all installs fixed column 412 at the both ends that remove frame 411, and the quantity of fixed column 412 is two to be parallel to each other. Moreover, a clamping component is hinged to one end of the fixed column 412 far away from the moving frame 411.

The clamping assembly is arranged, so that the die can be firmly fixed on the clamping mechanism, the die is effectively prevented from dropping in the conveying process, and the safety of workers is ensured.

In this embodiment, referring to fig. 3, the gripping assembly includes: the rotating levers 511 are installed at opposite sides of the fixed column 412, and the number of the rotating levers 511 is two and parallel to each other. The clamping plate 512 is rotatably connected to one end of the rotating rod 511, which is far away from the fixed column 412, and hook grooves 513 are formed in the clamping plate 512, wherein the number of the hook grooves 513 is two, and the hook grooves are parallel to each other. The hooking groove 513 can hook up the mold.

Meanwhile, a groove 514 is formed in the clamping plate 512, a lifting hook 515 is hinged to the clamping plate 512, the lifting hook 515 can be matched with one of the hook grooves 513, and the lifting hook 515 is located inside the groove 514. A supporting rod 516 is hinged at the top of the clamping plate 512, and the other end of the supporting rod 516 is hinged with a lifting hook 515. Simultaneously, the top of the clamping plate 512 is provided with a third driving element, wherein the third driving element can be a cylinder, a piston rod of the cylinder is hinged to the lifting hook 515, and the piston rod of the cylinder moves back and forth to drive the lifting hook 515 to move back and forth, so that the lifting hook 515 and the hook groove 513 can be matched with each other in an automatic manner, and the mold can be lifted.

In addition, a driving unit is provided at one side of the moving frame 411, and the driving unit can turn over the mold that has been fixed to the knock-out frame 1.

In this embodiment, the driving assembly includes: a connecting frame 611 installed at one side of the moving frame 411, and a cylinder 612 installed at one side of the gripping plate 512 close to the supporting frame 3. Meanwhile, a fourth driving part is hinged to the connecting frame 611, wherein the fourth driving part can be an air cylinder, a piston rod of the air cylinder is hinged to the cylinder 612, and the cylinder 612 can be driven to reciprocate through the reciprocating motion of the piston rod of the air cylinder, so that the mold can be driven to turn over.

And, the top of frame 1 is provided with actuating mechanism, and actuating mechanism can drive the clamp and get the mechanism and slide along vertical direction.

In this embodiment, the drive mechanism includes: and a fifth driving assembly is arranged at the top of the machine frame 1, wherein the fifth driving assembly can be motors, and the number of the motors is eight. A single grooved pulley 711 is installed on an output shaft of the motor, pulleys 712 are arranged on two sides of the moving frame 411, a steel wire rope 714 is installed on the single grooved pulley 711, the steel wire rope 714 surrounds the pulleys 712, the motor drives the single grooved pulley 711 to rotate, and therefore the steel wire rope 714 can be wound on the single grooved pulley 711, and the clamping assembly can be driven to slide in the vertical direction.

Meanwhile, a guide component is arranged on one side of the movable frame 411, and the guide component has a guiding effect on the lifting of the clamping mechanism.

In this embodiment, referring to fig. 5, the guide assembly includes: the mounting blocks 811 are mounted at one end of the moving frame 411, and the number of the mounting blocks 811 is four, and the four mounting blocks are respectively located at both ends of the moving frame 411 and are parallel to each other. A supporting block 812 is mounted at one side of the mounting block 811, and a roller 813 is mounted at one side of the supporting block 812 distant from the mounting block 811. Meanwhile, the two sides of the support frame 3 are provided with two long blocks 814, and the long blocks 814 are parallel to each other. Roller 813 is capable of sliding in the vertical direction of bar piece 814.

In addition, a first driving assembly is provided at one side of the moving frame 411, and the first driving assembly can fix the demolding device and the mold, which has been demolded, together in an automated manner after the demolding operation is completed.

In this embodiment, the first driving assembly includes: and a sixth driving assembly vertically installed on the top of the moving frame 411, wherein the sixth driving assembly may be an air cylinder, a piston rod of the air cylinder is installed with a locking rod 911, and the locking rod 911 can be driven to reciprocate through the reciprocating motion of the piston rod of the air cylinder.

Meanwhile, a moving block 912 is slidably connected to one side of the moving frame 411, and the moving block 912 can slide in the vertical direction of the moving frame 411. One end of the locking rod 911, which is far away from the cylinder, is fixed with the moving block 912, and the moving block 912 can be driven to move linearly through the linear motion of the cylinder piston rod. Meanwhile, a seventh driving member is installed on one side of the moving block 912, wherein the seventh driving member may be a motor, a threaded rod 913 is installed on an output shaft of the motor, and the threaded rod 913 can be driven to rotate by the rotation of the output shaft of the motor.

The implementation principle of the embodiment is as follows: the walking trolley 2 slides on the rack 1, and when the walking trolley 2 moves to the position of the mold, the positioning mechanism can accurately position the walking trolley 2; when the demolding device is at the mold position, the clamping mechanism can clamp the mold in an automatic mode; after the clamping is finished, the driving mechanism lifts the mold, the mold is driven by the traveling trolley 2 to be conveyed to the position of demolding, the mold is turned over, a finished blank in the mold is poured down, and the first driving assembly can lift the mold and convey the mold out of the position of demolding.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a full-automatic efficient evaporates presses aerated concrete block shedder, includes frame (1), sets up walking dolly (2) at frame (1) top to and set up in frame (1) bottom, and support frame (3) that are parallel to each other, its characterized in that: the automatic clamping device is characterized in that a positioning mechanism used for automatically positioning the walking trolley (2) is arranged at the top of the rack (1), a clamping mechanism used for clamping a mold is arranged between the supporting frames (3), and a driving mechanism used for driving the clamping mechanism to slide along the vertical direction is arranged at the top of the rack (1).

2. The full-automatic high-efficiency autoclaved aerated concrete block demoulding device according to claim 1, is characterized in that: the positioning mechanism includes: slide along the horizontal direction and connect locating piece (111) towards outside one side in frame (1), set up standing groove (112) at locating piece (111) top set up frame (1) is towards the drive assembly who is used for driving locating piece (111) in outside both sides, and vertical the installation is in walking dolly (2) is towards the first driving piece of outside one side, installs locating component on the first driving piece output shaft.

3. The full-automatic high-efficiency autoclaved aerated concrete block demoulding device according to claim 2, is characterized in that: the drive assembly includes: the setting is in frame (1) is towards outside one side, and pivot (211) that are parallel to each other, fixes sprocket (212) of frame (1) one end are kept away from in pivot (211), set up and be in frame (1) is towards outside one side, and with sprocket (212) engaged with chain (213), install one of them frame (1) one end's second driving piece is kept away from in pivot (211).

4. The full-automatic high-efficiency autoclaved aerated concrete block demoulding device according to claim 2, is characterized in that: the positioning assembly comprises: install frame (1) is towards fixed block (311) on outside one side, sets up on fixed block (311), and supply the through-hole that first driving piece output shaft passed, install support (313) at fixed block (311) top articulate on support (313) and with first driving piece output shaft looks articulated connecting rod (314), install frame (1) one end is kept away from in connecting rod (314) and with standing groove (112) matched with locking piece (315).

5. The full-automatic high-efficiency autoclaved aerated concrete block demoulding device according to claim 1, is characterized in that: the clamping mechanism comprises: move frame (411) along vertical direction sliding connection between support frame (3), install move frame (411) both ends, and fixed column (412) that are parallel to each other articulate fixed column (412) keep away from the clamp subassembly of moving frame (411) one end, set up move frame (411) one side, be used for the drive to press from both sides the rotatory drive assembly of subassembly.

6. The full-automatic high-efficiency autoclaved aerated concrete block demoulding device according to claim 5, is characterized in that: the clamping assembly comprises: the mold clamping device comprises a rotating rod (511) installed on the opposite side of the fixed column (412), a clamping plate (512) rotatably connected to the rotating rod (511), a hook groove (513) formed in the clamping plate (512) and used for hooking a mold, a groove (514) formed in the clamping plate (512), a hook (515) hinged to the clamping plate (512), placed in the groove (514) and matched with the hook groove (513), a supporting rod (516) with one end hinged to the top of the clamping plate (512) and one end hinged to the hook (515), and a third driving piece installed at the top of the clamping plate (512) and with one end hinged to the hook (515).

7. The full-automatic high-efficiency autoclaved aerated concrete block demoulding device according to claim 5, is characterized in that: the drive assembly includes: a connecting frame (611) arranged at one side of the moving frame (411), a cylinder (612) arranged on the clamping assembly, and a fourth driving piece hinged on the connecting frame (611) and having one end connected with one end of the cylinder (612).

8. The full-automatic high-efficiency autoclaved aerated concrete block demoulding device according to claim 1, is characterized in that: the drive mechanism includes: the clamping mechanism comprises a fifth driving part arranged at the top of the frame (1), a single-grooved pulley (711) arranged on an output shaft of the fifth driving part, a pulley (712) arranged on the clamping mechanism, and a steel wire rope (714) with one end fixed on the single-grooved pulley (711) and surrounding the pulley (712), wherein a guide component is arranged on one side of the clamping mechanism.

9. The full-automatic high-efficiency autoclaved aerated concrete block demoulding device according to claim 8, is characterized in that: the guide assembly includes: the clamping device comprises mounting blocks (811) which are arranged on one side of the clamping mechanism and are parallel to each other, a supporting block (812) which is arranged on one side of the mounting blocks (811), rollers (813) which are arranged on the supporting block (812), and long strip blocks (814) which are arranged on two sides of the supporting frame (3) and are used for the rollers (813) to slide.

10. The full-automatic high-efficiency autoclaved aerated concrete block demoulding device according to claim 1, is characterized in that: one side of getting the mechanism is provided with first drive assembly: the first drive assembly includes: the clamping mechanism comprises a sixth driving piece horizontally arranged on the clamping mechanism, a locking rod (911) arranged on an output shaft of the sixth driving piece, a moving block (912) arranged at one end, far away from the sixth driving piece, of the locking rod (911), a seventh driving piece arranged on the moving block (912), and a threaded rod (913) arranged on an output shaft of the seventh driving piece.