CN216093651U - Reaction unit is used in rubber production convenient to separation slagging-off - Google Patents

Abstract

The utility model discloses a reaction device for rubber production, which is convenient for separation and slag removal and comprises a reaction box, wherein heating boxes are respectively arranged on two sides of the reaction box, a blower is respectively arranged on one side inside the heating box, a heating plate is respectively arranged on one side, far away from the blower, inside the heating box, and material guide pipes are respectively arranged on two sides of the reaction box above the heating box. The utility model is provided with the sieving plate to filter the waste slag generated in the reaction so as to ensure the purity of rubber production, and simultaneously, the rotating motor drives the rotating shaft to rotate so that the disc and the fixed block synchronously rotate, and simultaneously, the connecting frame rotates around the fixed block so that the swinging block moves left and right, and simultaneously, the saw teeth are meshed with the toothed plates so as to facilitate the left and right movement of the saw teeth, and the sieving plate can be driven to move left and right when in use so as to accelerate the sieving of materials.

Description

Reaction unit is used in rubber production convenient to separation slagging-off

Technical Field

The utility model relates to the technical field of rubber production equipment, in particular to a reaction device for rubber production, which is convenient for separation and slag removal.

Background

The rubber is an organic high polymer material, is a high-elastic polymer with reversible deformation, has better elasticity and electrical insulation, can be divided into natural rubber and synthetic rubber, is one of important basic industries of national economy, is widely applied to the traffic and transportation industry, the agriculture, forestry and water conservancy industry, the civil engineering and building industry and the like, and is very widely applied.

Rubber can produce various waste residues when the production reaction, and current reaction unit is inconvenient when using to carry out filtration separation to the waste residue that produces, and the waste residue is piled up and can be influenced rubber's reaction production to can influence the purity of rubber production, thereby influence the production quality of rubber, on the basis of this, need propose further improvement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a reaction device for rubber production, which is convenient for separation and deslagging, so as to solve the problem that reaction waste residues are inconvenient to treat in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a reaction unit is used in rubber production convenient to separation slagging-off, includes the reaction box, the heating cabinet is all installed to the both sides of reaction box, and the hair-dryer is all installed to one side of heating cabinet inside, the hot plate is all installed to the inside one side of keeping away from the hair-dryer of heating cabinet, and the both sides of the reaction box of heating cabinet top all install the passage, the feeding case is all installed on the top of passage, the leading truck is installed on the top of reaction box, and the leading truck both sides all overlap and be equipped with the movable sleeve, be connected with the backup pad between the movable sleeve, the three-way pipe is installed on the top in the reaction box outside, the outside of reaction box of three-way pipe below is provided with screening mechanism.

Preferably, the telescopic link is all installed to the both sides of backup pad bottom, and the electric putter is all installed to the bottom of telescopic link, the central point department of putting of backup pad bottom is provided with rabbling mechanism.

Preferably, rabbling mechanism includes servo motor, and servo motor sets up in the central point of backup pad bottom and puts the department, the main shaft is installed to servo motor's bottom, the outside cover of main shaft is equipped with the installation cover, and the both sides of installation cover all install the stirring leaf, all be provided with the through-hole on the stirring leaf, the even cover in the outside of (mixing) shaft of installation cover below is equipped with the connection dress cover, and connects the both sides of dress cover and all install branch, the U-shaped frame is installed to the bottom of (mixing) shaft, and the both sides of U-shaped frame all install and scrape the wall brush, the one end of branch all is connected with the inner wall of U-shaped frame.

Preferably, the cross-section of stirring leaf is the pentagon design, the cross-section of through-hole is the quadrangle design, the through-hole is provided with three groups on the stirring leaf.

Preferably, the spliced pole is all installed to the both sides of rabbling mechanism bottom, and the bottom of spliced pole all is connected with the bottom of U-shaped frame, the brush dish is installed to the bottom of spliced pole, and the brush is evenly installed to the bottom of brush dish.

Preferably, the connecting pipe is installed to the bottom of three-way pipe, and the bottom of connecting pipe installs the exhaust-gas treatment case, the one end of connecting pipe extends to the inside of exhaust-gas treatment case, the shower nozzle of breathing in is all installed to the both sides on the inside top of reaction box, the internally mounted of exhaust-gas treatment case has the aspiration pump, and one side of aspiration pump installs the dust absorption pipe, dust absorption pipe top is connected with the bottom of connecting pipe, and the both ends of connecting pipe all extend to the inside of reaction box and be connected with the one end of the shower nozzle of breathing in, the hose is installed to one side that the aspiration pump kept away from the dust absorption pipe, the internally mounted of exhaust-gas treatment case of aspiration pump below has the filter screen.

Preferably, screening mechanism includes the rotating electrical machines, and the rotating electrical machines sets up in the bottom in the reaction box outside, the rotation axis is installed through the shaft coupling to the output of rotating electrical machines, and the one end of rotation axis extends to the inside of reaction box and installs the disc, the fixed block is installed in the outside of disc, and the outside cover of fixed block is equipped with the link, the swing piece is installed on the top of link, and the bottom of swing piece evenly installs the sawtooth, the meshing of the top of sawtooth has the pinion rack, and the outside slidable mounting of pinion rack has the deflector, the screening board is installed on the top of pinion rack.

Preferably, the outer side of the swinging block is provided with a plurality of sawteeth, the outer side of the toothed plate is provided with tooth grooves matched with the sawteeth, and the swinging block and the toothed plate form an engaging mechanism through the sawteeth.

Compared with the prior art, the utility model has the beneficial effects that: the reaction device for rubber production convenient for separating and removing slag not only has the function of separating and removing slag, but also is convenient for stirring and mixing production reaction raw materials so as to improve the reaction rate of rubber production, is convenient for absorbing and removing waste gas in reaction, and has the function of protecting the environment;

(1) the screening plate is arranged, so that waste residues generated in the reaction can be filtered, the purity of rubber production can be ensured, meanwhile, the rotating shaft is driven to rotate through the rotating motor, so that the disc and the fixed block can rotate synchronously, the connecting frame rotates around the fixed block, so that the swinging block can move left and right, and meanwhile, the saw teeth and the toothed plate are meshed with each other, so that the saw teeth can move left and right conveniently, the screening plate can be driven to move left and right when the screening plate is used, the screening of materials is accelerated, the screening is finer, the purity of rubber production is improved, meanwhile, the U-shaped frame is rotated through the stirring shaft, the hairbrush is driven to rotate synchronously, filter residues on the screening plate are cleaned, filter holes are prevented from being blocked, and the filtering efficiency is improved;

(2) the main shaft and the stirring shaft are sequentially driven to rotate through the servo motor, the mounting sleeve synchronously rotates, the stirring blade is driven to rotate to fully stir and mix raw materials in the reaction box, meanwhile, through the through holes formed in the stirring blade, the air flow rate is accelerated, the mixing efficiency is improved, meanwhile, the telescopic rod is pushed to move upwards through the electric push rod, so that the servo motor moves upwards, the movable sleeve is driven to slide upwards along the guide frame, the stability of the servo motor moving upwards is ensured, the stirring shaft is driven to move upwards through the upward movement of the servo motor, the stirring range of the stirring blade is synchronously adjusted, materials in the reaction box can be comprehensively stirred and mixed, and the mixing efficiency is improved;

(3) through having set up the aspiration pump to through breathing in the shower nozzle with the quick absorption of the waste gas that the inside reaction of reaction box produced, waste gas flows into the dust absorption pipe through the connecting pipe, pours into the hose into after that, through the filter screen, so that filters the impurity in the waste gas, in order to ensure that waste gas can normally discharge, has the effect of environmental protection.

Drawings

In order to more clearly illustrate the embodiments of the present 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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a rear view of the present invention;

FIG. 2 is a schematic cross-sectional front view of the present invention;

FIG. 3 is a schematic structural view of a screening mechanism of the present invention;

FIG. 4 is a schematic sectional view of the exhaust treatment box according to the present invention;

fig. 5 is a schematic perspective view of the stirring blade of the present invention.

The reference numerals in the figures illustrate: 1. a reaction box; 2. a heating box; 3. a feeding box; 4. a movable sleeve; 5. a guide frame; 6. a support plate; 7. a telescopic rod; 8. a stirring mechanism; 801. a servo motor; 802. a main shaft; 803. a stirring shaft; 804. installing a sleeve; 805. stirring blades; 806. a through hole; 807. connecting and sleeving; 808. a strut; 809. a U-shaped frame; 810. a wall scraping brush; 9. an electric push rod; 10. a three-way pipe; 11. a connecting pipe; 12. a waste gas treatment tank; 13. a screening mechanism; 1301. a rotating electric machine; 1302. a rotating shaft; 1303. A disc; 1304. a fixed block; 1305. a connecting frame; 1306. a swing block; 1307. saw teeth; 1308. A toothed plate; 1309. a screening plate; 1310. a guide plate; 14. connecting columns; 15. brushing a disc; 16. a blower; 17. heating plates; 18. a material guide pipe; 19. a brush; 20. an air pump; 21. a hose; 22. a filter screen; 23. a dust collection pipe; 24. the nozzle of breathing in.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1-5, an embodiment of the present invention is shown: a reaction device convenient for separation and slag removal for rubber production comprises a reaction box 1, wherein heating boxes 2 are respectively arranged on two sides of the reaction box 1, a blower 16 is respectively arranged on one side inside the heating box 2, a heating plate 17 is respectively arranged on one side, far away from the blower 16, inside the heating box 2, the type of the heating plate 17 is GSD-12E, material guide pipes 18 are respectively arranged on two sides of the reaction box 1 above the heating box 2, a feeding box 3 is respectively arranged at the top ends of the material guide pipes 18, a guide frame 5 is arranged at the top end of the reaction box 1, movable sleeves 4 are respectively sleeved on two sides of the guide frame 5, and a supporting plate 6 is connected between the movable sleeves 4;

the two sides of the bottom end of the supporting plate 6 are both provided with telescopic rods 7, the bottom ends of the telescopic rods 7 are both provided with electric push rods 9, the electric push rods 9 are FDR40 in type, and the central position of the bottom end of the supporting plate 6 is provided with a stirring mechanism 8;

the stirring mechanism 8 comprises a servo motor 801, the model of the servo motor 801 is Y90S-2, the servo motor 801 is connected with commercial power through a wire, the servo motor 801 is arranged at the center of the bottom end of the supporting plate 6, a main shaft 802 is arranged at the bottom end of the servo motor 801, an installation sleeve 804 is sleeved on the outer side of the main shaft 802, stirring blades 805 are arranged on two sides of the installation sleeve 804, through holes 806 are formed in the stirring blades 805, a connection sleeve 807 is uniformly sleeved on the outer side of a stirring shaft 803 below the installation sleeve 804, supporting rods 808 are arranged on two sides of the connection sleeve 807, a U-shaped frame 809 is arranged at the bottom end of the stirring shaft 803, wall scraping brushes 810 are arranged on two sides of the U-shaped frame 809, and one end of each supporting rod 808 is connected with the inner wall of the U-shaped frame 809;

connecting columns 14 are respectively arranged on two sides of the bottom end of the stirring mechanism 8, the bottom ends of the connecting columns 14 are respectively connected with the bottom end of the U-shaped frame 809, a brush disc 15 is arranged at the bottom end of each connecting column 14, and brushes 19 are uniformly arranged at the bottom ends of the brush discs 15;

specifically, as shown in fig. 1 and 2, when in use, the raw materials for production reaction are poured from the feeding box 3, flow into the reaction box 1 through the material guiding pipe 18, heat the reaction box 1 through the heating plate 17, and simultaneously, the blower 16 is turned on to rapidly blow the heat generated by the heating plate 17 into the reaction box 1;

specifically, as shown in fig. 1 and fig. 2, when in use, the main shaft 802 and the stirring shaft 803 are sequentially driven to rotate by the servo motor 801, the stirring blade 805 is driven to synchronously rotate, the raw materials in the reaction box 1 are fully stirred and mixed, meanwhile, the telescopic rod 7 is pushed to move upwards by the electric push rod 9, so that the servo motor 801 moves upwards, the stirring shaft 803 is driven to move upwards, the stirring range of the stirring blade 805 is synchronously adjusted, the materials in the reaction box 1 can be comprehensively stirred and mixed, the mixing efficiency is improved, meanwhile, the U-shaped frame 809 is rotated by the stirring shaft 803, the brush 19 is driven to synchronously rotate, filter residues on the sieving plate 1309 are cleaned, the filter holes are prevented from being blocked, and the filtering efficiency is improved;

the top end of the outer side of the reaction box 1 is provided with a three-way pipe 10;

the bottom end of the three-way pipe 10 is provided with a connecting pipe 11, the bottom end of the connecting pipe 11 is provided with an exhaust gas treatment box 12, one end of the connecting pipe 11 extends into the exhaust gas treatment box 12, two sides of the top end inside the reaction box 1 are provided with air suction nozzles 24, the exhaust gas treatment box 12 is internally provided with an air suction pump 20, the type of the air suction pump 20 is JV-0.6/12.5, one side of the air suction pump 20 is provided with a dust suction pipe 23, the top end of the dust suction pipe 23 is connected with the bottom end of the connecting pipe 11, two ends of the connecting pipe 11 extend into the reaction box 1 and are connected with one end of the air suction nozzles 24, one side of the air suction pump 20, which is far away from the dust suction pipe 23, is provided with a hose 21, and the interior of the exhaust gas treatment box 12 below the air suction pump 20 is provided with a filter screen 22;

specifically, as shown in fig. 1 and 4, when in use, the suction pump 20 is arranged so as to rapidly suck the waste gas generated by the reaction inside the reaction tank 1 through the suction nozzle 24, the waste gas flows into the dust suction pipe 23 through the connecting pipe 11, then is injected into the hose 21, and passes through the filter screen 22 so as to filter the impurities in the waste gas, so as to ensure that the waste gas can be normally discharged, and has the effect of protecting the environment;

a screening mechanism 13 is arranged on the outer side of the reaction box 1 below the three-way pipe 10;

the screening mechanism 13 comprises a rotating motor 1301, the model number of the rotating motor 1301 is Y315M-2, the rotating motor 1301 is connected with commercial power through a lead, the rotating motor 1301 is arranged at the bottom end of the outer side of the reaction box 1, the output end of the rotating motor 1301 is provided with a rotating shaft 1302 through a coupler, one end of the rotating shaft 1302 extends into the reaction box 1 and is provided with a disc 1303, the outer side of the disc 1303 is provided with a fixed block 1304, the outer side of the fixed block 1304 is sleeved with a connecting frame 1305, the top end of the connecting frame 1305 is provided with a swinging block 1306, the bottom end of the swinging block 1306 is uniformly provided with saw teeth 1307, the top end of each saw tooth 1307 is engaged with a toothed plate 1308, the outer part of the toothed plate 1308 is provided with a guide plate 1310 in a sliding manner, and the top end of the toothed plate 1308 is provided with a screening plate 1309;

a plurality of saw teeth 1307 are arranged on the outer side of the swinging block 1306, tooth grooves matched with the saw teeth 1307 are arranged on the outer side of the toothed plate 1308, and the swinging block 1306 and the toothed plate 1308 form a meshing mechanism through the saw teeth 1307;

specifically, as shown in fig. 2 and 3, when the device is used, the sieving plate 1309 is arranged so as to filter waste residues generated in the reaction to ensure the purity of rubber production, then the rotating motor 1301 is turned on to drive the rotating shaft 1302 to rotate so that the disc 1303 and the fixed block 1304 rotate synchronously, the connecting frame 1305 rotates around the fixed block 1304 so that the swinging block 1306 moves left and right, and the saw teeth 1307 and the toothed plate 1308 are meshed with each other so that the saw teeth 1307 move left and right, so that the sieving plate 1309 can move left and right when the device is used, and the sieving of materials is accelerated.

The working principle is as follows: when the utility model is used, firstly, production reaction raw materials are poured from a feeding box 3 and flow into a reaction box 1 along a material guide pipe 18, then a heating plate 17 is opened to heat the reaction box 1, a blower 16 is opened at the same time, heat generated by the heating plate 17 is rapidly blown into the reaction box 1 to heat and melt the materials, then a servo motor 801 is opened to drive a main shaft 802 to rotate, thereby driving a stirring shaft 803 to rotate, further driving a mounting sleeve 804 to rotate, driving stirring blades 805 to synchronously rotate to fully stir and mix the raw materials in the reaction box 1, so as to improve the reaction rate of the raw materials, simultaneously driving a connecting sleeve 807 to rotate through the rotation of the stirring shaft 803, further sequentially driving a support rod 808 and a U-shaped frame 809 to synchronously rotate, driving a scraping brush 810 to rub against the inner wall of the reaction box 1, cleaning the inner wall of the reaction box 1, then opening an electric push rod 9, the telescopic rod 7 is pushed to move upwards, so that the servo motor 801 is driven to move upwards, the movable sleeve 4 is driven to slide upwards along the guide frame 5, the stability of the servo motor 801 moving upwards is ensured, the servo motor 801 moves upwards to drive the stirring shaft 803 to move upwards, the stirring range of the stirring blade 805 is synchronously adjusted, and the stirring and mixing efficiency is improved;

secondly, after the mixing reaction, the material falls on a screening plate 1309, impurities in the material are filtered through the screening plate 1309, meanwhile, a rotating motor 1301 is started to drive a rotating shaft 1302 to rotate, so that a disc 1303 and a fixed block 1304 are driven to synchronously rotate, then a connecting frame 1305 is driven to rotate around the fixed block 1304, then a swinging block 1306 is driven to move left and right, meanwhile, the sawtooth 1307 and a toothed plate 1308 are meshed with each other, namely, the sawtooth 1307 is driven to move left and right, so that the screening plate 1309 is driven to move left and right, the material falling on the screening plate 1309 is screened, so that waste residues in the reaction are filtered, the purity of rubber production is improved, the connecting column 14 and a brush disc 15 are driven to rotate through the rotation of a stirring shaft 803, and meanwhile, a brush 19 is driven to synchronously rotate, filter residues on the screening plate 1309 are cleaned, and filter holes are prevented;

finally, the air pump 20 is turned on, the waste gas generated by the reaction in the reaction tank 1 is quickly sucked by the air suction nozzle 24, flows into the dust suction pipe 23 through the connecting pipe 11, is injected into the hose 21, and is filtered by the filter screen 22 to ensure that the waste gas can be normally discharged, so that the environment protection effect is achieved.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. The utility model provides a reaction unit is used in rubber production convenient to separation slagging-off, includes reaction box (1), its characterized in that: heating cabinet (2) are all installed to the both sides of reaction box (1), and hair-dryer (16) are all installed to the inside one side of heating cabinet (2), hot plate (17) are all installed to the inside one side of keeping away from hair-dryer (16) of heating cabinet (2), and the both sides of reaction box (1) of heating cabinet (2) top all install passage (18), feeding case (3) are all installed on the top of passage (18), leading truck (5) are installed on the top of reaction box (1), and leading truck (5) both sides all overlap and are equipped with movable sleeve (4), be connected with backup pad (6) between movable sleeve (4), three-way pipe (10) are installed on the top in reaction box (1) outside, the outside of reaction box (1) of three-way pipe (10) below is provided with screening mechanism (13).

2. The reaction device for rubber production convenient for separation and slag removal according to claim 1, characterized in that: the telescopic rod (7) is all installed to the both sides of backup pad (6) bottom, and electric putter (9) are all installed to the bottom of telescopic rod (7), the central point department of putting of backup pad (6) bottom is provided with rabbling mechanism (8).

3. The reaction device for rubber production convenient for separation and slag removal according to claim 2, characterized in that: rabbling mechanism (8) include servo motor (801), and servo motor (801) set up in the central point of backup pad (6) bottom and put the department, main shaft (802) are installed to the bottom of servo motor (801), the outside cover of main shaft (802) is equipped with installation cover (804), and the both sides of installing cover (804) all install stirring leaf (805), all be provided with through-hole (806) on stirring leaf (805), the even cover in the outside of (mixing) shaft (803) of installation cover (804) below is equipped with connects dress cover (807), and connects the both sides of dress cover (807) and all install branch (808), U-shaped frame (809) are installed to the bottom of (mixing) shaft (803), and the both sides of U-shaped frame (809) all install and scrape wall brush (810), the one end of branch (808) all is connected with the inner wall of U-shaped frame (809).

4. The reaction device for rubber production convenient for separation and slag removal of claim 3, wherein: the cross sections of the stirring blades (805) are all in pentagonal design, the cross sections of the through holes (806) are all in quadrilateral design, and three groups of the through holes (806) are arranged on the stirring blades (805).

5. The reaction device for rubber production convenient for separation and slag removal according to claim 2, characterized in that: spliced pole (14) are all installed to the both sides of rabbling mechanism (8) bottom, and the bottom of spliced pole (14) all is connected with the bottom of U-shaped frame (809), brush dish (15) are installed to the bottom of spliced pole (14), and brush (19) are evenly installed to the bottom of brush dish (15).

6. The reaction device for rubber production convenient for separation and slag removal according to claim 1, characterized in that: the bottom end of the three-way pipe (10) is provided with a connecting pipe (11), the bottom end of the connecting pipe (11) is provided with an exhaust gas treatment box (12), one end of the connecting pipe (11) extends into the waste gas treatment box (12), two sides of the top end in the reaction box (1) are respectively provided with an air suction nozzle (24), the waste gas treatment box (12) is internally provided with an air suction pump (20), and one side of the air pump (20) is provided with a dust suction pipe (23), the top end of the dust suction pipe (23) is connected with the bottom end of the connecting pipe (11), and both ends of the connecting pipe (11) extend to the interior of the reaction box (1) and are connected with one end of the air suction nozzle (24), a hose (21) is arranged on one side of the air pump (20) far away from the dust suction pipe (23), and a filter screen (22) is arranged in the waste gas treatment box (12) below the air pump (20).

7. The reaction device for rubber production convenient for separation and slag removal according to claim 1, characterized in that: screening mechanism (13) include rotating electrical machines (1301), and rotating electrical machines (1301) set up in the bottom in reaction box (1) outside, rotation axis (1302) are installed through the shaft coupling to the output of rotating electrical machines (1301), and the one end of rotation axis (1302) extends to the inside of reaction box (1) and installs disc (1303), fixed block (1304) are installed to the outside of disc (1303), and the outside cover of fixed block (1304) is equipped with link span (1305), swing piece (1306) is installed on the top of link span (1305), and the bottom of swing piece (1306) evenly installs sawtooth (1307), the top meshing of sawtooth (1307) has pinion plate (1308), and the outside slidable mounting of pinion plate (1308) has deflector (1310), screening board (1309) is installed to the top of pinion plate (1308).

8. The reaction device for rubber production convenient for separation and slag removal of claim 7, wherein: a plurality of sawteeth (1307) are arranged on the outer side of the swinging block (1306), tooth grooves matched with the sawteeth (1307) are arranged on the outer side of the toothed plate (1308), and the swinging block (1306) and the toothed plate (1308) form an engagement mechanism through the sawteeth (1307).

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