Mechanism sand processing material lifting equipment

Abstract

This utility model discloses a material lifting device for manufactured sand processing, belonging to the field of manufactured sand processing technology. It includes a base plate and a guide cylinder rotatably mounted on the base plate. A conveying motor is fixedly installed at the lower end of the guide cylinder, and the output shaft of the conveying motor is fixedly connected to a conveying auger located inside the guide cylinder. A material dispersing and screening processing component is provided on the base plate. The processing component includes a guide hopper fixedly connected to the base plate and communicating with the guide cylinder. A guide plate is slidably connected to the inner side of the guide hopper, and the lower end of the guide plate is arc-shaped. A screen is fixedly connected to the arc-shaped end of the guide plate. A rotating shaft located inside the guide plate is rotatably connected to the inner side of the guide hopper. This utility model, through the first suction pipe on the guide cylinder and the second suction pipe on the connecting ring, in conjunction with a fan on the dust collection bin, can adsorb and treat the dust generated during the input and output of the manufactured sand, thereby reducing the pollution of the surrounding environment during the lifting process and improving the material lifting effect.

Description

Technical Field

[0001] This utility model relates to the field of manufactured sand processing technology, and in particular to a material lifting device for manufactured sand processing. Background Technology

[0002] Manufactured sand refers to sand produced by sand making machines and other auxiliary equipment. The finished product is more regular and can be processed into sand of different shapes and sizes according to different process requirements, which can better meet daily needs.

[0003] During the processing of manufactured sand, lifting equipment is usually required to raise the material from a low position to a high position for processing equipment to process the manufactured sand. For example, the utility model disclosed in CN218808379U discloses a dry sand lifting device for manufactured sand, which includes a fixed frame. A conveying device is detachably installed on the upper end of the fixed frame. A cooling component is movably connected inside the conveying device. The cooling component includes a shell, an electric fan, a water tank, a micro pump, and a nozzle. An adjusting component is movably connected to the lower end of the fixed frame. The fan blows air to cool the conveyor belt, and the micro pump sprays water from the water tank through the nozzle to further cool the conveyor belt. This reduces the temperature of the conveyor belt, making it less prone to damage and achieving the effect of protecting the conveyor belt.

[0004] However, in the process of conveying manufactured sand via a conveyor belt as described in the above application, dust is easily generated when the manufactured sand is dumped onto the conveyor belt and when the conveyor belt discharges the manufactured sand, which pollutes the surrounding environment. Therefore, a material lifting device for manufactured sand processing is proposed to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a material lifting device for manufactured sand processing. Through the processing component, it can adsorb and treat the dust generated during the feeding and discharging process of manufactured sand, and disperse, shake and screen the manufactured sand during the feeding process, which has the advantages of improving the material lifting effect.

[0007] (II) Technical Solution

[0008] This utility model provides a material lifting device for manufactured sand processing, including a base plate and a guide cylinder rotatably mounted on the base plate. A conveying motor is fixedly installed at the lower end of the guide cylinder, and the output shaft of the conveying motor is fixedly connected to a conveying auger located inside the guide cylinder.

[0009] The base plate is equipped with a material dispersing and screening device;

[0010] The processing component includes a material guide hopper fixedly connected to a base plate and communicating with a material guide cylinder. A material guide plate is slidably connected to the inner side of the material guide hopper, and the lower end of the material guide plate is arc-shaped. A screen is fixedly connected to the arc-shaped end of the material guide plate. A rotating shaft located inside the material guide plate is rotatably connected to the inner side of the material guide hopper. Several annularly distributed dispersing rods are fixedly connected to the outer surface of the rotating shaft. A dust collection hopper is fixedly connected to one side of the base plate. A first suction pipe with one end communicating with the dust collection hopper is fixedly connected to the back of the material guide cylinder. A connecting ring and a feeding hopper are fixedly connected to the upper surface of the material guide hopper in sequence, and the connecting ring is located between the feeding hopper and the material guide hopper. A dust collection box is slidably connected to the inner side of the dust collection hopper, and a filter screen is fixedly connected to the inner bottom wall of the dust collection box. A fan is fixedly installed on the front side of the dust collection hopper, and the air inlet of the fan is connected to the lower surface of the dust collection hopper through a pipe.

[0011] The connecting ring is hollow inside, and has several suction holes that communicate with the hollow part on its inner side. The outer surface of the connecting ring is connected to a second suction tube that is connected to the dust collection chamber at one end.

[0012] The guide bin is equipped with a drive assembly for driving the rotating shaft to rotate and the guide plate to vibrate, and the inner wall of the guide bin is equipped with an elastic support for elastically supporting the guide plate.

[0013] The base plate is equipped with an adjustment component for driving the rotation of the guide cylinder.

[0014] Preferably, the air inlet of the first suction tube is located at the discharge end of the guide tube, and the first suction tube is a flexible tube, while the discharge end of the guide tube is L-shaped.

[0015] Preferably, the lower end of the feed hopper is conical, and its conical end is connected to the lower end of the feed cylinder via a flexible hose.

[0016] Preferably, the rear end of the rotating shaft passes through the guide hopper, the driving assembly includes a drive motor fixedly connected to the rear side of the guide hopper, and the output shaft of the drive motor is fixed to the rear end of the rotating shaft, while a cam is fixedly connected at the connection between the drive motor and the rotating shaft, and a connecting rod with one end passing through the guide hopper is fixedly connected to the rear side of the guide plate, and a stop block is fixedly connected to the end of the connecting rod passing through the guide hopper.

[0017] Preferably, the connection between the connecting rod and the guide plate is L-shaped, and a through hole is provided on the back of the guide hopper for the L-end of the connecting rod to slide.

[0018] Preferably, the upper end of the guide plate is L-shaped, and two guide grooves are provided on both the left and right side walls of the inner cavity of the guide hopper. The elastic support includes a guide block that is slidably connected in the guide groove and fixedly connected to the L-end of the guide plate. A guide rod that passes through the guide block is fixedly connected in the guide groove, and a spring is fixedly connected between the guide block and the inner side of the guide groove.

[0019] Preferably, the guide plate is inclined with a higher front and a lower back, and the processing component also includes a collection bin fixedly connected to one side of the base plate, and a collection box is slidably connected inside the collection bin. The front side of the guide bin is connected to a discharge pipe with one end connected to the collection bin.

[0020] Preferably, the base plate has a U-shaped mounting hole, the adjusting component includes a drive plate slidably connected in the mounting hole, an electric push rod is fixedly installed in the mounting hole, and the output end of the electric push rod is fixed to the drive plate, and a hinge rod with one end hinged to the guide cylinder is hinged to the upper surface of the drive plate.

[0021] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0022] 1. This material lifting equipment for manufactured sand processing, through the first suction pipe on the guide cylinder and the second suction pipe on the connecting ring, in conjunction with the fan on the dust collection bin, can adsorb and treat the dust generated during the input and output of manufactured sand, thereby reducing the pollution of the surrounding environment caused by the manufactured sand during the lifting process and improving the material lifting effect.

[0023] 2. This material lifting equipment for processed manufactured sand uses a rotating dispersing rod in the feed hopper in conjunction with a vibrating screen to continuously rotate, disperse, and vibrate the manufactured sand fed into the feed hopper, thereby improving the quality of the manufactured sand introduced into the feed cylinder and further enhancing the material lifting effect.

[0024] 3. This material lifting equipment for manufactured sand processing can lift or lower the guide cylinder through the hinged rod during the process of pushing and pulling the drive plate by the electric push rod, so as to adjust the angle of the discharge end of the guide cylinder, so that the discharge end of the guide cylinder can be adapted to the height of the feed end of different equipment, thereby improving the adaptability of the entire equipment. Attached Figure Description

[0025] Figure 1 This is a perspective view of the overall structure of this utility model;

[0026] Figure 2 This is a three-dimensional sectional view of the processing component structure of this utility model;

[0027] Figure 3 This is a rear sectional view of the processing component structure of this utility model;

[0028] Figure 4 This utility model Figure 2 Enlarged view of point A in the middle.

[0029] Reference numerals: 1. Base plate; 2. Guide cylinder; 3. Adjusting component; 31. Electric push rod; 32. Drive plate; 33. Hinge rod; 4. Conveyor motor; 5. Processing component; 51. Guide bin; 52. Connecting ring; 53. Feed hopper; 54. Guide plate; 55. Screen; 56. Rotating shaft; 57. First suction pipe; 58. Second suction pipe; 59. Dust collection box; 510. Filter screen; 511. Dust collection bin; 512. Fan; 513. Collection bin; 514. Discharge pipe; 515. Collection box; 516. Dispersing rod; 517. Cam; 518. Connecting rod; 519. Abutment block; 520. Drive motor; 521. Guide block; 522. Guide rod; 523. Spring; 524. Guide block; 6. Conveying auger. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, such as welding, riveting, or bonding; it can also be a detachable connection, such as threaded connection, keyed connection, or pin connection; or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] like Figure 1-4As shown, the present invention proposes a material lifting device for processing manufactured sand, including a base plate 1 and a guide cylinder 2 rotatably mounted on the base plate 1. A conveying motor 4 is fixedly installed at the lower end of the guide cylinder 2, and the output shaft of the conveying motor 4 is fixedly connected to a conveying auger 6 located inside the guide cylinder 2. The spiral angle of the conveying auger 6 is 15~20°. The discharge end of the guide cylinder 2 is L-shaped, so that the conveying auger 6 inside the guide cylinder 2 conveys the material to the corner of the L end of the guide cylinder 2, and then discharges it through its L end.

[0034] The bottom plate 1 is equipped with a material dispersing and screening processing component 5; the bottom plate 1 is also equipped with an adjustment component 3 for driving the guide cylinder 2 to rotate and adjust.

[0035] In this invention, the processing component 5 can adsorb and treat the dust generated during the feeding and discharging of the manufactured sand, and can also disperse, shake and screen the manufactured sand during the feeding process.

[0036] It should be noted that the base plate 1 has a convex mounting hole. The adjusting component 3 includes a drive plate 32 that is slidably connected in the mounting hole. An electric push rod 31 is fixedly installed in the mounting hole, and the output end of the electric push rod 31 is fixed to the drive plate 32. A hinge rod 33 with one end hinged to the upper surface of the drive plate 32 is connected to the guide cylinder 2. When the electric push rod 31 is activated, it can push up or lower the guide cylinder 2 through the hinge rod 33 during the process of pushing and pulling the drive plate 32, so as to adjust the angle of the discharge end of the guide cylinder 2 to adapt to the height of the inlet end of different equipment.

[0037] The four corners of the lower surface of the base plate 1 are equipped with casters with brakes to increase the ease of moving the entire equipment.

[0038] In an optional embodiment, the processing component 5 includes a guide bin 51 fixedly connected to the base plate 1 and communicating with the guide cylinder 2; the lower end of the guide bin 51 is conical, and its conical end is connected to the lower end of the guide cylinder 2 through a hose, so that the hose at the lower end of the guide bin 51 can guide the manufactured sand material into the guide cylinder 2 without interfering with the rotation of the guide cylinder 2.

[0039] A guide plate 54 is slidably connected to the inner side of the guide hopper 51, and the lower end of the guide plate 54 is arc-shaped. A screen 55 is fixedly connected to the arc-shaped end of the guide plate 54. A rotating shaft 56 located inside the guide plate 54 is rotatably connected to the inner side of the guide hopper 51. Several annularly distributed dispersing rods 516 are fixedly connected to the outer surface of the rotating shaft 56. A dust collection bin 511 is fixedly connected to one side of the bottom plate 1. One end of the guide cylinder 2 is fixedly connected to the dust collection bin 51. A first suction pipe 57 is connected. A connecting ring 52 and a feeding hopper 53 are fixedly connected to the upper surface of the feeding hopper 53 and the feeding hopper 51 in sequence. The connecting ring 52 is located between the feeding hopper 53 and the feeding hopper 51. A dust collection box 59 is slidably connected to the inner side of the dust collection box 511. A filter screen 510 is fixedly connected to the inner bottom wall of the dust collection box 59. A fan 512 is fixedly installed on the front side of the dust collection box 511. The air inlet of the fan 512 is connected to the lower surface of the dust collection box 511 through a pipe.

[0040] The interior of the connecting ring 52 is hollow, and several suction holes communicating with the hollow part are opened on its inner side. A second suction tube 58 is connected to the outer surface of the connecting ring 52, one end of which is connected to the dust collection chamber 511.

[0041] The feed hopper 51 is equipped with a drive assembly for driving the rotating shaft 56 to rotate and the guide plate 54 to vibrate.

[0042] It should be noted that the inner wall of the guide hopper 51 is provided with an elastic support for the guide plate 54; the upper end of the guide plate 54 is L-shaped, and two guide grooves are provided on the left and right side walls of the inner cavity of the guide hopper 51. The elastic support includes a guide block 521 that is slidably connected in the guide groove and fixedly connected to the L end of the guide plate 54. A guide rod 522 that passes through the guide block 521 is fixedly connected in the guide groove, and a spring 523 is fixedly connected between the guide block 521 and the inner side of the guide groove. The guide plate 54 is elastically supported by the guide block 521 and the spring 523 in the guide groove.

[0043] The left and right side walls of the inner cavity of the guide hopper 51 are fixedly connected with guide blocks 524 located above the L end of the guide plate 54. The guide blocks 524 are used to guide the material, and at the same time, they can also block the guide blocks 521 and springs 523 in the guide groove to prevent the material from entering.

[0044] The air volume of the 512 fan is controlled at 4000~7000 m³ / h, which allows the dust to be better adsorbed.

[0045] In this embodiment, the first suction pipe 57 on the guide cylinder 2 and the second suction pipe 58 on the connecting ring 52, together with the fan 512 on the dust collection bin 511, can adsorb and treat the dust in the process of feeding and discharging the manufactured sand, so as to reduce the pollution of the surrounding environment by the manufactured sand during the lifting process and improve the material lifting effect.

[0046] The air inlet of the first suction pipe 57 is located at the discharge end of the guide cylinder 2, and the first suction pipe 57 is a flexible hose, so that the flexible first suction pipe 57 will not interfere with the rotation adjustment of the guide cylinder 2. The first suction pipe 57 and the second suction pipe 58 are both connected to the upper surface of the dust collection bin 511.

[0047] In an optional embodiment, the rear end of the rotating shaft 56 passes through the guide bin 51. The drive assembly includes a drive motor 520 fixedly connected to the rear side of the guide bin 51, and the output shaft of the drive motor 520 is fixed to the rear end of the rotating shaft 56. A cam 517 is fixedly connected at the connection between the drive motor 520 and the rotating shaft 56. A connecting rod 518 with one end passing through the guide bin 51 is fixedly connected to the rear side of the guide plate 54, and a stop block 519 is fixedly connected to one end of the connecting rod 518 that passes through the guide bin 51.

[0048] In this embodiment, when the driven motor 520 is started, it drives the rotating shaft 56 and the dispersing rod 516 on the rotating shaft 56 to rotate, which in turn drives the cam 517 to rotate synchronously. When the rotating cam 517 repeatedly presses against the abutment block 519, it can drive the guide plate 54 to reciprocate and vibrate along the vertical and horizontal plane in the guide bin 51 through the abutment block 519 and the connecting rod 518.

[0049] It should be noted that the connection between the connecting rod 518 and the guide plate 54 is L-shaped, and the back of the guide bin 51 has a through hole for the L end of the connecting rod 518 to slide, so that the connecting rod 518 passing through the guide bin 51 has space to move up and down.

[0050] In an optional embodiment, the guide plate 54 is inclined with a higher front and a lower back. The processing component 5 also includes a collection bin 513 fixedly connected to one side of the base plate 1, and a collection box 515 is slidably connected inside the collection bin 513. A discharge pipe 514 with one end connected to the collection bin 513 is connected to the front side of the guide bin 51.

[0051] In this embodiment, during the screening of manufactured sand, the material that is not screened out by the guide plate 54 (higher in the front and lower in the back) and the screen 55 will slide towards the lower part of the guide plate 54 and the screen 55, and then be guided along the discharge pipe 514 to the collection box 515 of the collection bin 513 for collection and subsequent centralized processing.

[0052] It should be noted that the connecting ring 52 and the feed hopper 53 are located above the high position of the guide plate 54.

[0053] The working principle in the above embodiments is as follows:

[0054] The entire equipment moves to the equipment where the material needs to be lifted via the casters on the base plate 1. Then, during the process of starting the electric push rod 31 to push and pull the drive plate 32, the guide cylinder 2 can be lifted or lowered via the hinge rod 33 to adjust the angle of the discharge end of the guide cylinder 2. When the discharge end of the guide cylinder 2 rotates to the inlet of the equipment where the material needs to be fed, the electric push rod 31 can be turned off.

[0055] Since the air inlet of the first suction pipe 57 is located at the discharge end of the guide cylinder 2, and the second suction pipe 58 is connected between the connecting ring 52 and the dust collection bin 511, when the manufactured sand is fed into the guide bin 51 through the feed hopper 53 and discharged through the discharge end of the guide cylinder 2, the fan 512 is started to adsorb the dust collection bin 511. After the dust collection bin 511 generates negative pressure, the dust can be adsorbed by the dust suction holes on the first suction pipe 57 and the second connecting ring 52 in conjunction with the second suction pipe 58. After the adsorbed dust or powder flows into the dust collection bin 511, it can be filtered and intercepted by the filter screen 510 on the bottom wall of the dust collection box 59, so that the subsequent operators can take out the dust collection box 59 for centralized treatment.

[0056] When the start-up drive motor 520 drives the rotating shaft 56 and the dispersing rod 516 on the rotating shaft 56 to rotate, it can drive the cam 517 to rotate synchronously. When the rotating cam 517 repeatedly squeezes and abuts the abutment block 519, it can drive the guide plate 54 to reciprocate along the vertical and horizontal direction in the guide bin 51 through the abutment block 519 and the connecting rod 518. This allows the rotating dispersing rod 516 in the guide bin 51, in conjunction with the shaking screen 55, to continuously rotate, disperse, and shake the manufactured sand material fed into the guide bin 51. The screened manufactured sand material can be guided through the hose at the lower end of the guide bin 51 to the guide cylinder 2, where it is lifted and conveyed by the rotating conveying auger 6.

[0057] The manufactured sand material that is not screened by screen 55 slides along the guide plate 54 and the lower part of screen 55, and then is guided along the discharge pipe 514 to the collection box 515 of the collection bin 513 for collection and subsequent centralized processing.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A material lifting device for manufactured sand processing, comprising a base plate (1) and a guide cylinder (2) rotatably mounted on the base plate (1), wherein a conveying motor (4) is fixedly installed at the lower end of the guide cylinder (2), and the output shaft of the conveying motor (4) is fixedly connected to a conveying auger (6) located inside the guide cylinder (2). Its features are: The bottom plate (1) is provided with a material dispersing and screening processing component (5); The processing component (5) includes a guide hopper (51) fixedly connected to the base plate (1) and communicating with the guide cylinder (2). A guide plate (54) is slidably connected to the inner side of the guide hopper (51), and the lower end of the guide plate (54) is arc-shaped. A screen (55) is fixedly connected to the arc-shaped end of the guide plate (54). A rotating shaft (56) located inside the guide plate (54) is rotatably connected to the inner side of the guide hopper (51). Several ring-shaped equidistant dispersing rods (516) are fixedly connected to the outer surface of the rotating shaft (56). A dust collection bin (511) is fixedly connected to one side of the base plate (1). A first suction pipe (57) is fixedly connected to the back of the cylinder (2), one end of which is connected to the dust collection bin (511). A connecting ring (52) and a feeding hopper (53) are fixedly connected to the upper surface of the guide bin (51) in sequence, and the connecting ring (52) is located between the feeding hopper (53) and the guide bin (51). A dust collection box (59) is slidably connected to the inner side of the dust collection bin (511), and a filter screen (510) is fixedly connected to the inner bottom wall of the dust collection box (59). A fan (512) is fixedly installed on the front side of the dust collection bin (511), and the air inlet of the fan (512) is connected to the lower surface of the dust collection bin (511) through a pipe. The interior of the connecting ring (52) is hollow, and several suction holes are provided on its inner side that communicate with the hollow part. The outer surface of the connecting ring (52) is connected to a second suction tube (58) that is connected to the dust collection chamber (511) at one end. The guide bin (51) is provided with a drive assembly for driving the rotating shaft (56) to rotate and the guide plate (54) to vibrate. The inner wall of the guide bin (51) is provided with an elastic support member for elastically supporting the guide plate (54). The base plate (1) is provided with an adjusting component (3) for driving the guide cylinder (2) to rotate and adjust.

2. The material lifting equipment for manufactured sand processing according to claim 1, characterized in that, The air inlet of the first suction tube (57) is located at the discharge end of the guide tube (2), and the first suction tube (57) is a flexible tube, and the discharge end of the guide tube (2) is L-shaped.

3. The material lifting equipment for manufactured sand processing according to claim 1, characterized in that, The lower end of the feed hopper (51) is conical, and its conical end is connected to the lower end of the feed cylinder (2) through a flexible hose.

4. The material lifting equipment for manufactured sand processing according to claim 1, characterized in that, The rear end of the rotating shaft (56) passes through the guide bin (51). The drive assembly includes a drive motor (520) fixedly connected to the rear side of the guide bin (51), and the output shaft of the drive motor (520) is fixed to the rear end of the rotating shaft (56). A cam (517) is fixedly connected at the connection between the drive motor (520) and the rotating shaft (56). A connecting rod (518) with one end passing through the guide bin (51) is fixedly connected to the rear side of the guide plate (54), and a stop block (519) is fixedly connected to one end of the connecting rod (518) passing through the guide bin (51).

5. The material lifting equipment for manufactured sand processing according to claim 4, characterized in that, The connection between the connecting rod (518) and the guide plate (54) is L-shaped, and the back of the guide hopper (51) is provided with a through hole for the L end of the connecting rod (518) to slide.

6. The material lifting equipment for manufactured sand processing according to claim 1, characterized in that, The upper end of the guide plate (54) is L-shaped. The left and right side walls of the inner cavity of the guide hopper (51) are provided with two guide grooves. The elastic support includes a guide block (521) that is slidably connected in the guide groove and fixedly connected to the L end of the guide plate (54). A guide rod (522) that passes through the guide block (521) is fixedly connected in the guide groove. A spring (523) is fixedly connected between the guide block (521) and the inner side of the guide groove.

7. The material lifting equipment for manufactured sand processing according to claim 1, characterized in that, The guide plate (54) is inclined with the front higher than the back. The processing component (5) also includes a collection bin (513) fixedly connected to one side of the base plate (1), and a collection box (515) is slidably connected inside the collection bin (513). The front side of the guide bin (51) is connected to a discharge pipe (514) that is connected to the collection bin (513) at one end.

8. The material lifting equipment for manufactured sand processing according to claim 1, characterized in that, The base plate (1) has a convex mounting hole. The adjusting component (3) includes a drive plate (32) that is slidably connected in the mounting hole. An electric push rod (31) is fixedly installed in the mounting hole, and the output end of the electric push rod (31) is fixed to the drive plate (32). A hinge rod (33) with one end hinged to the guide cylinder (2) is hinged to the upper surface of the drive plate (32).

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