Emulsifying device for environment-friendly paint

Abstract

The utility model relates to the technical field of environment-friendly paint emulsification, in particular to an environment-friendly paint emulsification device, which improves the emulsification quality and efficiency, is convenient to clean the inner wall of an emulsification tank and reduces the cost. Comprising an emulsifying tank; the device further comprises a stirring mechanism, a first transmission mechanism, a mixing mechanism, a driving mechanism, a cleaning mechanism and a second rotating mechanism, the first transmission mechanism is installed in the stirring mechanism, the mixing mechanism is installed on the first transmission mechanism, the driving mechanism is installed at the top end of the stirring mechanism, and the cleaning mechanism is installed in the stirring mechanism; the second rotating mechanism is mounted on the stirring mechanism, the stirring mechanism and the first transmission mechanism are driven by the driving mechanism to transversely stir and longitudinally mix raw materials under the transmission of the first transmission mechanism, and the cleaning mechanism is driven by the driving mechanism and the transmission of the second rotating mechanism to clean the inner wall of the emulsifying tank.

Description

Technical Field

[0001] The utility model relates to the technical field of environmentally friendly paint emulsification, in particular to an environmentally friendly paint emulsification device. Background Art

[0002] Environmentally friendly paint, also known as environmentally friendly coating or low-carbon coating, refers to paint products whose performance indicators and safety indicators meet the technical requirements of national environmental labeling products on the premise of meeting their respective product standards. Emulsification is required during the production of environmentally friendly paint.

[0003] The existing environmentally friendly paint emulsification technology, such as the prior art with application number CN201922145139.6, includes a kettle body, a ring tube, a diaphragm pump, a diaphragm pump, a stirring barrel, a filter hole and a stirring blade group, etc., and the material inside the kettle body is emulsified by an internal stirring mechanism and an external stirring mechanism arranged in opposite directions.

[0004] However, after the environmentally friendly paint is emulsified, there will be environmentally friendly paint residue on the inner wall of the reactor. If it cannot be cleaned in time, it will affect the emulsification quality of the environmentally friendly paint in the later stage. In addition, the existing technology uses multiple motors and pump bodies, which is costly. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an environmentally friendly paint emulsification device which improves the quality and efficiency of emulsification, facilitates the cleaning of the inner wall of the emulsification tank, and reduces the cost.

[0006] The utility model discloses an environmentally friendly paint emulsifying device, comprising an emulsifying tank; further comprising a stirring mechanism, a first transmission mechanism, a mixing mechanism, a driving mechanism, a cleaning mechanism and a second rotating mechanism, wherein the first transmission mechanism is installed in the stirring mechanism, the mixing mechanism is installed on the first transmission mechanism, the driving mechanism is installed on the top of the stirring mechanism, the cleaning mechanism is installed in the stirring mechanism, and the second rotating mechanism is installed on the stirring mechanism; the stirring mechanism and the first transmission mechanism are driven by the driving mechanism under the transmission of the first transmission mechanism to perform horizontal stirring and vertical mixing on the raw materials, and the cleaning mechanism is driven by the driving mechanism and the transmission of the second rotating mechanism to clean the inner wall of the emulsifying tank; the stirring mechanism and the first transmission mechanism are driven by the driving mechanism under the transmission of the first transmission mechanism to perform horizontal stirring and vertical mixing on the raw materials, thereby improving the efficiency and quality of emulsification, and the cleaning mechanism is driven by the driving mechanism and the transmission of the second rotating mechanism to clean the inner wall of the emulsifying tank, thereby improving the practicality.

[0007] Preferably, the stirring mechanism includes an emulsification tank, a first stirring shaft and stirring blades, the first stirring shaft is rotatably installed in the emulsification tank, and the stirring blades are installed on the first stirring shaft; the raw materials in the emulsification tank are stirred by turning on the driving mechanism to drive the first stirring shaft to rotate, and then drive the stirring blades to rotate.

[0008] Preferably, the first transmission mechanism includes a fixed tooth plate, a rotating tooth disk and a gear, the fixed tooth plate is installed on the inner wall of the emulsification tank, the rotating tooth disk is installed on the first stirring shaft, the gear is clamped between the fixed tooth plate and the rotating tooth disk, and the gear is engaged with the fixed tooth plate and the rotating tooth disk; the first stirring shaft is driven to rotate by turning on the driving mechanism, and then the stirring blade is driven to rotate to stir the raw materials in the emulsification tank, the rotating tooth disk is driven to rotate by the rotation of the first stirring shaft, and then the mixing mechanism is driven through the meshing relationship to vertically mix the raw materials in the emulsification tank.

[0009] Preferably, the mixing mechanism includes a mixing shaft and a mixing impeller, one end of the mixing shaft is rotatably mounted on the gear, a slide groove is provided on the bottom surface of the interior of the emulsification tank, a slider is provided in the slide groove, the other end of the mixing shaft is rotatably mounted on the slider, and the mixing impeller is installed on the mixing shaft; the driving mechanism is turned on to drive the first stirring shaft to rotate, and then the impeller is driven to rotate to stir the raw materials in the emulsification tank, the rotation of the first stirring shaft drives the rotating gear disk to rotate, and then the mixing shaft is driven to rotate through the meshing relationship, and then the mixing impeller is driven to rotate to vertically mix the raw materials in the emulsification tank.

[0010] Preferably, the driving mechanism includes a sliding frame, a sliding plate, a threaded rod, a motor and an output shaft. The sliding frame is installed at the top of the emulsification tank, the sliding plate is slidably installed on the sliding frame, the threaded rod is installed at the top of the sliding frame through a threaded relationship, the threaded rod is rotatably installed at the top of the sliding plate, the motor is installed at the bottom end of the sliding plate, and the output shaft is installed on the output end of the motor. The bottom end of the output shaft is provided with a driving shaft, and the top end of the first stirring shaft is provided with a driving groove; by rotating the threaded rod, the sliding plate is driven to slide on the sliding frame due to the threaded relationship, and then the driving shaft on the output shaft is inserted into the driving groove, and then the motor is turned on to drive the first stirring shaft to rotate, and then the stirring blades are driven to rotate to stir the raw materials in the emulsification tank, the rotating gear disk is driven to rotate by the rotation of the first stirring shaft, and then the mixing shaft is driven to rotate through the meshing relationship, and then the mixing stirring blades are driven to rotate to vertically mix the raw materials in the emulsification tank.

[0011] Preferably, the cleaning mechanism includes a lead screw, a guide rod and a cleaning scraper, one end of the lead screw is rotatably mounted on the bottom end inside the emulsification tank, the other end of the lead screw is rotatably mounted on the bottom end of the fixed tooth plate, one end of the guide rod is mounted on the bottom end inside the emulsification tank, the other end of the guide rod is mounted on the bottom end of the fixed tooth plate, the cleaning scraper is slidably mounted on the guide rod, and the cleaning scraper cooperates with the lead screw thread; by rotating the threaded rod, the sliding plate is driven to slide on the sliding frame due to the threaded relationship, and the lead screw is driven to rotate under the transmission of the second rotating mechanism, and then the cleaning scraper is driven to slide on the guide rod through the threaded relationship, and then the inner wall of the emulsification tank is cleaned through the guide rod.

[0012] Preferably, the second rotating mechanism includes a first bevel gear, a second bevel gear, a third bevel gear, a rotating shaft, a fourth bevel gear, a driving gear, a transmission gear and a transmission belt, the first bevel gear is mounted on the lead screw, a rotating shaft is provided on the side wall of the emulsification tank, the second bevel gear and the third bevel gear are mounted at both ends of the rotating shaft, the first bevel gear is meshed with the second bevel gear, the rotating shaft is rotatably mounted on the side wall of the emulsification tank through a mounting frame, the fourth bevel gear is mounted on the bottom end of the rotating shaft, the fourth bevel gear is meshed with the third bevel gear, the driving gear is mounted on the output shaft, and the transmission gear is rotatably mounted on the emulsification tank through the rotating shaft At the top of the transmission gear, the transmission gear can be meshed with the driving gear. Pulleys are provided on the rotating shaft and the rotating shaft of the transmission gear, and the transmission belt connects the two pulleys; by rotating the threaded rod, the sliding plate is driven to slide on the sliding frame due to the threaded relationship, so that the driving gear is meshed with the transmission gear, and the driving gear is driven to rotate by turning on the motor, and then the pulley is driven to rotate through the meshing relationship, and then the motor is driven to rotate through 48, and then the lead screw is driven to rotate through the meshing relationship, and then the cleaning scraper is driven to slide on the guide rod through the threaded relationship, and then the inner wall of the emulsification tank is cleaned through the guide rod.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the driving mechanism drives the stirring mechanism and the first transmission mechanism to stir the raw materials horizontally and mix them vertically under the transmission of the first transmission mechanism, thereby improving the efficiency and quality of emulsification; the driving mechanism drives the cleaning mechanism through the transmission of the second rotating mechanism to clean the inner wall of the emulsification tank, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a first axonometric structural schematic diagram of the utility model;

[0015] Figure 2 It is a second axonometric structural schematic diagram of the utility model;

[0016] Figure 3 It is a front-view cross-sectional axonometric structural schematic diagram of the utility model;

[0017] Figure 4 It is a front cross-sectional structural schematic diagram of the utility model;

[0018] Figure 5 It is a schematic diagram of the side-view cross-section axonometric structure of the utility model;

[0019] Figure 6 It is a schematic diagram of the top-view cross-section axonometric structure of the utility model;

[0020] Markings in the accompanying drawings: 01, stirring mechanism; 11, emulsifying tank; 12, first stirring shaft; 13, stirring blade; 02, first transmission mechanism; 21, fixed tooth plate; 22, rotating tooth plate; 23, gear; 03, mixing mechanism; 31, mixing shaft; 32, mixing stirring blade; 04, driving mechanism; 41, sliding frame; 42, sliding plate; 43, threaded rod; 44, motor; 45, output shaft; 05, cleaning mechanism; 51, screw; 52, guide rod; 53, cleaning scraper; 06, second rotating mechanism; 61, first bevel gear; 62, second bevel gear; 63, third bevel gear; 64, rotating shaft; 65, fourth bevel gear; 66, driving gear; 67, transmission gear; 68, transmission belt. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0022] Example 1

[0023] like Figures 2 to 4 and Figure 6 As shown, an environmentally friendly paint emulsification device includes an emulsification tank 11, a stirring mechanism 01, a first transmission mechanism 02, a mixing mechanism 03, a driving mechanism 04, a cleaning mechanism 05 and a second rotating mechanism 06, wherein the first transmission mechanism 02 is installed in the stirring mechanism 01, the mixing mechanism 03 is installed on the first transmission mechanism 02, the driving mechanism 04 is installed on the top of the stirring mechanism 01, the cleaning mechanism 05 is installed in the stirring mechanism 01, and the second rotating mechanism 06 is installed on the stirring mechanism 01;

[0024] The driving mechanism 04 drives the stirring mechanism 01 and the first transmission mechanism 02 to stir the raw materials horizontally and mix them vertically under the transmission of the first transmission mechanism 02, and the cleaning mechanism 05 is driven by the driving mechanism 04 and the transmission of the second rotating mechanism 06 to clean the inner wall of the emulsification tank 11;

[0025] The stirring mechanism 01 includes an emulsification tank 11, a first stirring shaft 12 and a stirring blade 13. The first stirring shaft 12 is rotatably mounted in the emulsification tank 11, and the stirring blade 13 is mounted on the first stirring shaft 12.

[0026] The first transmission mechanism 02 includes a fixed tooth plate 21, a rotating tooth disc 22 and a gear 23. The fixed tooth plate 21 is mounted on the inner wall of the emulsifying tank 11, the rotating tooth disc 22 is mounted on the first stirring shaft 12, and the gear 23 is clamped between the fixed tooth plate 21 and the rotating tooth disc 22. The gear 23 is meshed with the fixed tooth plate 21 and the rotating tooth disc 22.

[0027] The mixing mechanism 03 includes a mixing shaft 31 and a mixing impeller 32. One end of the mixing shaft 31 is rotatably mounted on the gear 23. A slide groove is provided on the bottom surface of the emulsifying tank 11. A slider is provided in the slide groove. The other end of the mixing shaft 31 is rotatably mounted on the slider. The mixing impeller 32 is mounted on the mixing shaft 31.

[0028] The driving mechanism 04 includes a sliding frame 41, a sliding plate 42, a threaded rod 43, a motor 44 and an output shaft 45. The sliding frame 41 is installed at the top of the emulsifying tank 11, the sliding plate 42 is slidably installed on the sliding frame 41, the threaded rod 43 is installed at the top of the sliding frame 41 through a threaded relationship, the threaded rod 43 is rotatably installed at the top of the sliding plate 42, the motor 44 is installed at the bottom end of the sliding plate 42, the output shaft 45 is installed on the output end of the motor 44, the bottom end of the output shaft 45 is provided with a driving shaft, and the top end of the first stirring shaft 12 is provided with a driving groove;

[0029] By rotating the threaded rod 43, the sliding plate 42 is driven to slide on the sliding frame 41 due to the threaded relationship, so that the driving shaft on the output shaft 45 is inserted into the driving groove, and then the motor 44 is turned on to drive the first stirring shaft 12 to rotate, and then the stirring blade 13 is driven to rotate to stir the raw materials in the emulsification tank 11. The rotation of the first stirring shaft 12 drives the rotating gear plate 22 to rotate, and then the meshing relationship drives the mixing shaft 31 to rotate, and then the mixing stirring blade 32 is driven to rotate to vertically mix the raw materials in the emulsification tank 11. The cleaning mechanism 05 is driven by the driving mechanism 04 and the transmission of the second rotating mechanism 06 to clean the inner wall of the emulsification tank 11, thereby improving practicality.

[0030] Example 2

[0031] like Figure 2 , Figure 4 and Figure 5 As shown, an environmentally friendly paint emulsification device includes an emulsification tank 11, a stirring mechanism 01, a first transmission mechanism 02, a mixing mechanism 03, a driving mechanism 04, a cleaning mechanism 05 and a second rotating mechanism 06, wherein the first transmission mechanism 02 is installed in the stirring mechanism 01, the mixing mechanism 03 is installed on the first transmission mechanism 02, the driving mechanism 04 is installed on the top of the stirring mechanism 01, the cleaning mechanism 05 is installed in the stirring mechanism 01, and the second rotating mechanism 06 is installed on the stirring mechanism 01;

[0032] The driving mechanism 04 drives the stirring mechanism 01 and the first transmission mechanism 02 to stir the raw materials horizontally and mix them vertically under the transmission of the first transmission mechanism 02, and the cleaning mechanism 05 is driven by the driving mechanism 04 and the transmission of the second rotating mechanism 06 to clean the inner wall of the emulsification tank 11;

[0033] The driving mechanism 04 includes a sliding frame 41, a sliding plate 42, a threaded rod 43, a motor 44 and an output shaft 45. The sliding frame 41 is installed at the top of the emulsifying tank 11, the sliding plate 42 is slidably installed on the sliding frame 41, the threaded rod 43 is installed at the top of the sliding frame 41 through a threaded relationship, the threaded rod 43 is rotatably installed at the top of the sliding plate 42, the motor 44 is installed at the bottom end of the sliding plate 42, the output shaft 45 is installed on the output end of the motor 44, the bottom end of the output shaft 45 is provided with a driving shaft, and the top end of the first stirring shaft 12 is provided with a driving groove;

[0034] The cleaning mechanism 05 includes a lead screw 51, a guide rod 52 and a cleaning scraper 53. One end of the lead screw 51 is rotatably mounted on the bottom end of the emulsification tank 11, and the other end of the lead screw 51 is rotatably mounted on the bottom end of the fixed tooth plate 21. One end of the guide rod 52 is mounted on the bottom end of the emulsification tank 11, and the other end of the guide rod 52 is mounted on the bottom end of the fixed tooth plate 21. The cleaning scraper 53 is slidably mounted on the guide rod 52, and the cleaning scraper 53 is threadedly matched with the lead screw 51.

[0035] The second rotating mechanism 06 includes a first bevel gear 61, a second bevel gear 62, a third bevel gear 63, a rotating shaft 64, a fourth bevel gear 65, a driving gear 66, a transmission gear 67 and a transmission belt 68. The first bevel gear 61 is mounted on the lead screw 51, a rotating shaft is provided on the side wall of the emulsification tank 11, the second bevel gear 62 and the third bevel gear 63 are mounted at both ends of the rotating shaft, the first bevel gear 61 is meshed with the second bevel gear 62, the rotating shaft 64 is rotatably mounted on the side wall of the emulsification tank 11 through a mounting frame, the fourth bevel gear 65 is mounted on the bottom end of the rotating shaft 64, the fourth bevel gear 65 is meshed with the third bevel gear 63, the driving gear 66 is mounted on the output shaft 45, the transmission gear 67 is rotatably mounted on the top end of the emulsification tank 11 through the rotating shaft, the transmission gear 67 can mesh with the driving gear 66, pulleys are provided on the rotating shaft of the transmission gear 67 and the rotating shaft 64, and the transmission belt 68 connects the two pulleys;

[0036] The driving mechanism 04 drives the stirring mechanism 01 and the first transmission mechanism 02 to stir the raw materials horizontally and mix them vertically under the transmission of the first transmission mechanism 02, so as to improve the efficiency and quality of emulsification. By rotating the threaded rod 43, the sliding plate 42 is driven to slide on the sliding frame 41 due to the threaded relationship, so that the driving gear 66 is meshed with the transmission gear 67. The driving gear 66 is driven to rotate by turning on the motor 44, and then the pulley is driven to rotate through the meshing relationship, and then the motor 44 is driven to rotate through 48, and then the lead screw 51 is driven to rotate through the meshing relationship, and then the cleaning scraper 53 is driven to slide on the guide rod 52 through the threaded relationship, and then the inner wall of the emulsification tank 11 is cleaned through the guide rod 52.

[0037] like Figures 1 to 6As shown, the utility model is an environmentally friendly paint emulsifying device. When it is working, the threaded rod 43 is rotated, and the sliding plate 42 is driven to slide on the sliding frame 41 due to the threaded relationship, so that the driving shaft on the output shaft 45 is inserted into the driving groove, and then the motor 44 is turned on to drive the first stirring shaft 12 to rotate, and then the stirring blade 13 is driven to rotate to stir the raw materials in the emulsification tank 11, and the rotation of the first stirring shaft 12 drives the rotating toothed disk 22 to rotate, and then the mixing shaft 31 is driven to rotate through the meshing relationship, and then the mixing stirring blade 32 is driven to rotate to stir the emulsification tank. The raw materials in 11 are mixed longitudinally, and the threaded rod 43 is rotated. Due to the threaded relationship, the sliding plate 42 is driven to slide on the sliding frame 41, so that the driving gear 66 is meshed with the transmission gear 67, and the driving gear 66 is driven to rotate by turning on the motor 44, and then the pulley is driven to rotate through the meshing relationship, and then the motor 44 is driven to rotate through 48, and then the lead screw 51 is driven to rotate through the meshing relationship, and then the cleaning scraper 53 is driven to slide on the guide rod 52 through the threaded relationship, and then the inner wall of the emulsification tank 11 is cleaned through the guide rod 52.

[0038] The motor 44 of the utility model is purchased on the market, and technicians in the industry only need to install and operate it according to the accompanying instruction manual, without the need for technicians in the field to make creative efforts.

[0039] The main functions achieved by the utility model are: in the process of emulsifying the environmentally friendly paint, the quality and efficiency of the emulsification are improved, and the inner wall of the emulsification tank 11 is easily cleaned to reduce the cost.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An environmentally friendly paint emulsification device, comprising an emulsification tank (11); characterized in that: It also comprises a stirring mechanism (01), a first transmission mechanism (02), a mixing mechanism (03), a driving mechanism (04), a cleaning mechanism (05) and a second rotating mechanism (06), wherein the first transmission mechanism (02) is mounted in the stirring mechanism (01), the mixing mechanism (03) is mounted on the first transmission mechanism (02), the driving mechanism (04) is mounted on the top of the stirring mechanism (01), the cleaning mechanism (05) is mounted in the stirring mechanism (01), and the second rotating mechanism (06) is mounted on the stirring mechanism (01); The driving mechanism (04) drives the stirring mechanism (01) and the first transmission mechanism (02) under the transmission of the first transmission mechanism (02) to stir the raw materials horizontally and mix them vertically, and drives the cleaning mechanism (05) through the driving mechanism (04) and the transmission of the second rotating mechanism (06) to clean the inner wall of the emulsification tank (11).

2. An environmentally friendly paint emulsification device as claimed in claim 1, characterized in that: The stirring mechanism (01) comprises an emulsification tank (11), a first stirring shaft (12) and a stirring blade (13); the first stirring shaft (12) is rotatably mounted in the emulsification tank (11), and the stirring blade (13) is mounted on the first stirring shaft (12).

3. An environmentally friendly paint emulsification device as claimed in claim 2, characterized in that: The first transmission mechanism (02) comprises a fixed tooth plate (21), a rotating tooth disc (22) and a gear (23); the fixed tooth plate (21) is mounted on the inner wall of the emulsification tank (11); the rotating tooth disc (22) is mounted on the first stirring shaft (12); the gear (23) is clamped between the fixed tooth plate (21) and the rotating tooth disc (22); and the gear (23) meshes with the fixed tooth plate (21) and the rotating tooth disc (22).

4. An environmentally friendly paint emulsification device as claimed in claim 2, characterized in that: The mixing mechanism (03) comprises a mixing shaft (31) and a mixing impeller (32), one end of the mixing shaft (31) being rotatably mounted on the gear (23), a slide groove being provided on the bottom surface of the interior of the emulsifying tank (11), a slider being provided in the slide groove, the other end of the mixing shaft (31) being rotatably mounted on the slider, and the mixing impeller (32) being mounted on the mixing shaft (31).

5. The environmentally friendly paint emulsification device according to claim 2, characterized in that: The driving mechanism (04) comprises a sliding frame (41), a sliding plate (42), a threaded rod (43), a motor (44) and an output shaft (45); the sliding frame (41) is mounted on the top of the emulsifying tank (11); the sliding plate (42) is slidably mounted on the sliding frame (41); the threaded rod (43) is mounted on the top of the sliding frame (41) through a threaded relationship; the threaded rod (43) is rotatably mounted on the top of the sliding plate (42); the motor (44) is mounted on the bottom of the sliding plate (42); the output shaft (45) is mounted on the output end of the motor (44); a driving shaft is arranged at the bottom end of the output shaft (45); and a driving groove is arranged at the top of the first stirring shaft (12).

6. The environmentally friendly paint emulsification device according to claim 2, characterized in that: The cleaning mechanism (05) comprises a lead screw (51), a guide rod (52) and a cleaning scraper (53), one end of the lead screw (51) is rotatably mounted on the bottom end of the emulsification tank (11), the other end of the lead screw (51) is rotatably mounted on the bottom end of the fixed tooth plate (21), one end of the guide rod (52) is mounted on the bottom end of the emulsification tank (11), the other end of the guide rod (52) is mounted on the bottom end of the fixed tooth plate (21), the cleaning scraper (53) is slidably mounted on the guide rod (52), and the cleaning scraper (53) is threadedly engaged with the lead screw (51).

7. An environmentally friendly paint emulsification device as claimed in claim 2, characterized in that: The second rotating mechanism (06) comprises a first bevel gear (61), a second bevel gear (62), a third bevel gear (63), a rotating shaft (64), a fourth bevel gear (65), a driving gear (66), a transmission gear (67) and a transmission belt (68), wherein the first bevel gear (61) is mounted on the lead screw (51), a rotating shaft is provided on the side wall of the emulsification tank (11), the second bevel gear (62) and the third bevel gear (63) are mounted on both ends of the rotating shaft, the first bevel gear (61) is meshed with the second bevel gear (62), and the rotating shaft (64) The fourth bevel gear (65) is mounted on the bottom end of the rotating shaft (64), and the fourth bevel gear (65) is meshed with the third bevel gear (63). The driving gear (66) is mounted on the output shaft (45). The transmission gear (67) is mounted on the top end of the emulsification tank (11) through the rotating shaft, and the transmission gear (67) can mesh with the driving gear (66). The rotating shaft of the transmission gear (67) and the rotating shaft (64) are both provided with pulleys, and the transmission belt (68) connects the two pulleys.

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