Furniture and hardware intelligent automatic sorting device with guiding and partitioning functions
The intelligent automatic sorting device for furniture hardware with guided partitions and a combination of guide plates and blocking frames solves the problem of hardware accessories deviating from their position during transportation, achieving efficient and accurate automatic sorting.
Patent Information
- Application Number
- CN202422842833.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In the prior art, during the conveying process of hardware accessories, the materials may easily deviate from the designated position due to the excessive spacing of the guide roller structure, resulting in sorting errors.
The intelligent automatic sorting device for furniture hardware adopts guided partitioning. Through the combined design of guide plates and blocking frames, the blocking frames are used to limit the movement range of hardware accessories. The reciprocating drive and interval conveying components of the guide plates ensure that the hardware accessories move along the predetermined path and are accurately sorted to the designated location.
It achieves efficient and accurate sorting of hardware accessories, improves sorting efficiency and accuracy, and adapts to hardware accessories of different sizes.
Smart Images
Figure CN223440480U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hardware fittings sorting technical field, concretely relates to a furniture hardware intelligent automatic sorting device of guiding partition. BACKGROUND
[0002] With the rapid development of intelligent technology, more and more industries begin to introduce intelligent equipment to improve production efficiency and product quality, in furniture manufacturing industry, intelligent technology is gradually applied to hardware sorting link, automation technology is the key factor to promote hardware fittings sorting efficiency improvement, with the continuous progress of sensor, actuator, control system and other automation technologies, hardware fittings sorting gradually realizes the change from manual operation to automation production.
[0003] The patent document with the publication number CN218251552U discloses an intelligent automatic sorting table, which comprises a single set of guide table, an identification code scanning door bridge and a directional sliding hopper; the single set of guide table can automatically transfer the direction of the object according to the partition, reducing the workload of the operator, and the cooperation of the identification code scanning door bridge and the single set of guide table realizes intelligent automatic sorting, and the single set of guide table has the same structural characteristics and high universality, and has good combination effect.
[0004] When the above-mentioned patent document is used, the material is placed on the single set of guide table and transported by the single set of guide table, when the material is too much or too small, there is a certain gap between the guide roller moving structures in the single set of guide table, when the material is transported, it is easy to stop between the guide roller moving structures, so that the material is easily driven by the material behind, so that the material is driven to the position not belonging to the material storage. UTILITY MODEL CONTENT
[0005] In view of the above problems, an intelligent automatic sorting device for furniture hardware of guiding partition is provided, which solves the technical problem of inconvenient partition placement of hardware fittings by setting a guide plate for pushing hardware fittings to a partition sliding plate.
[0006] To solve the problems in the prior art, the utility model provides an intelligent automatic sorting device for furniture hardware of guiding partition, which comprises a conveyor, an identification code scanning door bridge is arranged on the conveyor, a blocking frame is arranged on the side wall of the conveyor, a conveying channel is formed between the two blocking frames, a spacing conveying assembly for spacing conveying hardware fittings is arranged at the top of the blocking frame, partition sliding plates are arranged on both sides of the conveyor, a guide assembly is further arranged on the conveyor, the guide assembly comprises a guide plate for pushing hardware fittings to the partition sliding plate and a reciprocating driving part for driving the guide plate to reciprocate.
[0007] Preferably, the reciprocating driving component comprises a sliding sleeve, a first rack, a limiting plate, a mounting frame, a rotating shaft, a first gear, a second gear, an extension frame, an arc-shaped rack, a first connecting rod, a support frame, a second motor, and a second connecting rod; the sliding sleeve is arranged on one side of the conveyor; the first rack is movably arranged in the sliding sleeve, one end of the first rack is connected with the guide plate; the limiting plate is arranged at the end of the first rack away from the guide plate; the mounting frame is arranged on the sliding sleeve; the rotating shaft is arranged in the mounting frame; the first gear is arranged on the rotating shaft and meshes with the first rack; the second gear is arranged on the rotating shaft and located at one side of the first gear; the extension frame is arranged on the sliding sleeve and located at one side of the sliding sleeve; the arc-shaped rack is rotatably arranged on the extension frame; and the conveyor is further provided with a rotating driving component for driving the rotation of the arc-shaped rack.
[0008] Preferably, the rotating driving component comprises a first connecting rod, a support frame, a second motor, and a second connecting rod; the first connecting rod is hingedly arranged at one side of the arc-shaped rack; the support frame is arranged at the bottom end of the conveyor; the second motor is arranged on the support frame; and the second connecting rod is arranged at the output end of the second motor, one end of the second connecting rod is hingedly connected with the first connecting rod.
[0009] Preferably, limiting sliding blocks are arranged at both sides of the first rack, and limiting sliding grooves for the movement of the limiting sliding blocks are arranged on the inner side of the sliding sleeve.
[0010] Preferably, the interval conveying assembly comprises support columns, a driving box, a moving plate, and a blocking cylinder; two support columns are arranged on the blocking frame; the driving box is arranged at the top end of the support columns; the moving plate is movably arranged on the inner side of the two groups of support columns; the support columns are provided with an adjusting component for driving the movement of the moving plate; and the blocking cylinder is arranged at the bottom end of the moving plate.
[0011] Preferably, the adjusting component comprises a rectangular groove, threaded columns, a driving block, a first motor, a first synchronous wheel, a rotating rod, a second synchronous wheel, and a first synchronous belt; the rectangular groove is arranged in each support column; two threaded columns are arranged in the rectangular groove correspondingly; the driving block is arranged on the threaded columns; the first motor is arranged in the driving box; the first synchronous wheel is arranged at the output end of the first motor; the rotating rod is arranged in the driving box and located at one side of the first motor, the rotating rod is connected with one side of the threaded columns; the second synchronous wheel is arranged on the rotating rod; the first synchronous belt is sleeved on the first synchronous wheel and the second synchronous wheel; and the rotating rod is further provided with a synchronous component for driving the synchronous rotation of the other side of the threaded columns.
[0012] Preferably, the synchronous component comprises a driving rod, a third synchronous wheel, a fourth synchronous wheel and a second synchronous belt; the driving rod is arranged in the driving box on the side away from the rotating rod of the first motor; the third synchronous wheel is arranged on the driving rod; the fourth synchronous wheel is arranged on the rotating rod and below the second synchronous wheel; and the second synchronous belt is sleeved on the third synchronous wheel and the fourth synchronous wheel.
[0013] The utility model discloses compared with prior art has the beneficial effects of:
[0014] 1. When hardware fittings reach the designated position, first drive the arc gear rack to rotate through the rotation driving component, because the arc gear rack is engaged with the second gear, drive the second gear to rotate through the rotation of the arc gear rack, and drive the rotating shaft to rotate through the rotation of the second gear, drive the first gear to rotate through the rotation of the rotating shaft, and because the first gear is engaged with the first gear rack, drive the first gear rack to move through the first gear, and drive the limiting plate to move through the movement of the first gear rack in the sliding sleeve, so that the drive guide plate moves, and the hardware fittings are guided to the designated partition slide through the guide plate, so that automatic sorting is realized.
[0015] 2. When the hardware fittings move in the conveying channel, through the setting of the blocking cylinder, when it is needed to convey the hardware fittings, the blocking cylinder starts, and the hardware fittings can move along the conveyer, when the hardware fittings pass through the blocking cylinder, the blocking cylinder restores the initial state, and blocks the movement of the next hardware fittings, so that the purpose of interval conveying is realized, and the position of the moving plate can be adjusted through the adjusting component, the movement of the moving plate drives the movement of the blocking cylinder, so that the size of the hardware fittings can be adjusted, so that a plurality of different hardware fittings can be adapted. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a stereoscopic structure diagram of the furniture hardware intelligent automatic sorting device of the guide partition Figure 1 .
[0017] Figure 2 It is a stereoscopic structure diagram of the furniture hardware intelligent automatic sorting device of the guide partition Figure 2 .
[0018] Figure 3 It is a perspective view of the guide plate, sliding sleeve and gear rack in the furniture hardware intelligent automatic sorting device of the guide partition.
[0019] Figure 4 It is a perspective view of the first gear, second gear and arc gear rack in the furniture hardware intelligent automatic sorting device of the guide partition.
[0020] Figure 5 It is a sectional view of the furniture hardware intelligent automatic sorting device of the guide partition under the side view angle.
[0021] The figure marks are: 1, conveyor; 2, identification code scanning door bridge; 3, blocking frame; 4, interval conveying assembly; 41, support column; 42, drive box; 43, moving plate; 44, blocking cylinder; 45, rectangular groove; 46, threaded column; 47, drive block; 48, first motor; 49, first synchronous wheel; 410, rotating rod; 411, second synchronous wheel; 412, first synchronous belt; 413, drive rod; 414, third synchronous wheel; 415, fourth synchronous wheel; 416, second synchronous belt; 5, partition sliding plate; 6, guide assembly; 61, guide plate; 62, sliding sleeve; 63, first rack; 64, limiting plate; 65, mounting frame; 66, rotating shaft; 67, first gear; 68, second gear; 69, extension frame; 610, arc-shaped rack; 611, first connecting rod; 612, support frame; 613, second motor; 614, second connecting rod. DETAILED DESCRIPTION
[0022] In order to further understand the features, technical means and specific purposes and functions achieved by the utility model, the utility model will be described in further detail below in combination with the drawings and specific embodiments.
[0023] Referring to Figures 1 to 5 As shown in the figure, the utility model provides a guide partitioned furniture hardware intelligent automatic sorting device, including conveyor 1, identification code scanning door bridge 2 is provided on conveyor 1, blocking frame 3 is provided on the both sides wall of conveyor 1, and the blocking frame 3 between forms a conveying channel, and the top of blocking frame 3 is provided with interval conveying assembly 4 for the interval conveying of hardware fittings, and partition sliding plate 5 is respectively provided on the both sides of conveyor 1, and guide assembly 6 is also provided on conveyor 1, and guide assembly 6 includes guide plate 61 for pushing hardware fittings to partition sliding plate 5 and reciprocating drive component for driving guide plate 61 to reciprocate.
[0024] By starting conveyor 1, and placing hardware fittings on conveyor 1, the movement range of hardware fittings on conveyor 1 is limited by the setting of blocking frame 3, ensures that hardware fittings can move according to the predetermined path, when hardware fittings pass through identification code scanning door bridge 2, identification code scanning door bridge 2 will quickly scan the identification code on hardware fittings, to determine the sorting area of hardware fittings, and by interval conveying assembly 4, interval conveying assembly 4 interval conveying hardware fittings, to ensure that hardware fittings maintain proper spacing during conveying, avoid collision and interference, when hardware fittings reach the specified position, by the setting of guide assembly 6, guide plate 61 is driven to move by reciprocating drive component, and hardware fittings are guided to the specified partition sliding plate 5, to realize intelligent automatic sorting, greatly improve the sorting efficiency and accuracy of hardware fittings.
[0025] Referring toFigures 1 to 4 As shown, the reciprocating drive component includes a sleeve 62, a first rack 63, a limit plate 64, a mounting bracket 65, a rotating shaft 66, a first gear 67, a second gear 68, an extension bracket 69, an arc-shaped rack 610, a first connecting rod 611, a support bracket 612, a second motor 613 and a second connecting rod 614; the sleeve 62 is arranged on one side of the conveyor 1; the first rack 63 is movably arranged in the sleeve 62, and one end of the first rack 63 is connected to the guide plate 61; the limit plate 64 is arranged at a position where the first rack 63 is away from the guide plate 61. Toward one end of the plate 61; the mounting frame 65 is arranged on the sliding sleeve 62; the rotating shaft 66 is arranged in the mounting frame 65; the first gear 67 is arranged on the rotating shaft 66, and the first gear 67 is engaged with the first rack 63; the second gear 68 is arranged on the rotating shaft 66 and is located on one side of the first gear 67; the extension frame 69 is arranged on the sliding sleeve 62 and is located on one side of the sliding sleeve 62; the arc rack 610 is rotatably arranged on the extension frame 69, and the conveyor 1 is also provided with a rotating drive component for driving the arc rack 610 to rotate.
[0026] When the hardware accessories reach the designated position, the arc-shaped rack 610 is first driven to rotate by the rotating driving component. Since the arc-shaped rack 610 is engaged with the second gear 68, the rotation of the arc-shaped rack 610 drives the second gear 68 to rotate, and the rotation of the second gear 68 drives the rotating shaft 66 to rotate, and the rotation of the rotating shaft 66 drives the first gear 67 to rotate. Then, since the first gear 67 is engaged with the first rack 63, the first rack 63 is driven to move by the first gear 67, and the first rack 63 moves in the sliding sleeve 62, and the first rack 63 drives the limit plate 64 to move, thereby driving the guide plate 61 to move, and guiding the hardware accessories to the designated partition slide 5 through the guide plate 61, thereby realizing automatic sorting.
[0027] See also Figure 4 As shown, the rotating driving component includes a first connecting rod 611, a support frame 612, a second motor 613 and a second connecting rod 614; the first connecting rod 611 is hingedly arranged on one side of the arc-shaped rack 610; the support frame 612 is arranged at the bottom end of the conveyor 1; the second motor 613 is arranged on the support frame 612; the second connecting rod 614 is arranged at the output end of the second motor 613, and one end of the second connecting rod 614 is hinged to the first connecting rod 611.
[0028] When the arc-shaped rack 610 needs to rotate, the second motor 613 is started, and the second motor 613 drives the second connecting rod 614 to rotate. Since the second connecting rod 614 is hinged to the first connecting rod 611, and the first connecting rod 611 is hinged to the arc-shaped rack 610, the arc-shaped rack 610 is driven to rotate by the rotation of the second connecting rod 614.
[0029] See also Figure 3As shown, the first rack 63 is provided with limiting sliding blocks on both sides, and the inner side of the sliding sleeve 62 is provided with limiting sliding grooves for the movement of the limiting sliding blocks.
[0030] When the first rack 63 moves in the sliding sleeve 62, the limiting sliding blocks on both sides of the first rack 63 move in the limiting sliding grooves arranged on the inner side of the sliding sleeve 62, so that the first rack 63 is more stable during movement.
[0031] Referring to Figure 5 As shown, the interval conveying assembly 4 comprises support columns 41, a driving box 42, a moving plate 43, and a blocking cylinder 44; the support columns 41 are provided in two and arranged on the blocking frame 3; the driving box 42 is arranged at the top end of the support column 41; the moving plate 43 is movably arranged on the inner side of the two groups of support columns 41; the support column 41 is provided with an adjusting component for driving the moving plate 43 to move; and the blocking cylinder 44 is arranged at the bottom end of the moving plate 43.
[0032] When the hardware fittings move in the conveying channel, the blocking cylinder 44 is arranged, when the hardware fittings need to be conveyed, the blocking cylinder 44 is started, and the hardware fittings can move along the conveyor 1, when the hardware fittings pass through the blocking cylinder 44, the blocking cylinder 44 returns to the initial state, and the movement of the next hardware fitting is blocked, so as to achieve the purpose of interval conveying, and the position of the moving plate 43 can be adjusted through the adjusting component, the movement of the blocking cylinder 44 is driven by the movement of the moving plate 43, so that the size of the hardware fittings can be adjusted, so that a plurality of different hardware fittings can be adapted.
[0033] Referring to Figure 5 As shown, the adjusting component comprises a rectangular groove 45, a threaded column 46, a driving block 47, a first motor 48, a first synchronous wheel 49, a rotating rod 410, a second synchronous wheel 411, and a first synchronous belt 412; the rectangular groove 45 is arranged in each support column 41; the threaded column 46 is provided in two and arranged in the rectangular groove 45 correspondingly; the driving block 47 is arranged on the threaded column 46; the first motor 48 is arranged in the driving box 42; the first synchronous wheel 49 is arranged at the output end of the first motor 48; the rotating rod 410 is arranged in the driving box 42 on one side of the first motor 48, and the rotating rod 410 is connected with one side threaded column 46; the second synchronous wheel 411 is arranged on the rotating rod 410; the first synchronous belt 412 is sleeved on the first synchronous wheel 49 and the second synchronous wheel 411, and the rotating rod 410 is further provided with a synchronous component for driving the other side threaded column 46 to rotate synchronously.
[0034] By starting the first motor 48, the first motor 48 drives the first synchronous wheel 49 to rotate, and the first synchronous belt 412 sleeved on the first synchronous wheel 49 drives the second synchronous wheel 411 to rotate, the rotation of the second synchronous wheel 411 drives the rotating rod 410 to rotate, and the rotating rod 410 drives the threaded column 46 to rotate, and the other side threaded column 46 is driven to rotate through the synchronous component, the synchronous rotation of the two sides threaded column 46 drives the driving block 47 on the two sides threaded column 46 to move, and the driving block 47 drives the moving plate 43 to move, and the moving plate 43 moves to adjust the effect of the blocking air cylinder 44.
[0035] Referring to Figure 5 As shown, the synchronous component includes a driving rod 413, a third synchronous wheel 414, a fourth synchronous wheel 415 and a second synchronous belt 416; the driving rod 413 is arranged in the driving box 42 and located on the side away from the rotating rod 410 of the first motor 48; the third synchronous wheel 414 is arranged on the driving rod 413; the fourth synchronous wheel 415 is arranged on the rotating rod 410 and located below the second synchronous wheel 411; the second synchronous belt 416 is sleeved on the third synchronous wheel 414 and the fourth synchronous wheel 415.
[0036] When the rotating rod 410 drives the threaded column 46 to rotate, the rotation of the rotating rod 410 drives the fourth synchronous wheel 415 to rotate, and the second synchronous belt 416 sleeved on the fourth synchronous wheel 415 drives the third synchronous wheel 414 to rotate, and the third synchronous wheel 414 drives the driving rod 413 to rotate, and since the driving rod 413 is connected with the other side threaded column 46, the threaded column 46 is driven to rotate, thereby achieving the effect of synchronous rotation.
[0037] By starting the conveyor 1, and placing the hardware fittings on the conveyor 1, the movement range of the hardware fittings on the conveyor 1 is limited by the setting of the blocking frame 3, and it is ensured that the hardware fittings can move according to the predetermined path, when the hardware fittings pass through the identification code scanning gate bridge 2, the identification code scanning gate bridge 2 will quickly scan the identification code on the hardware fittings, so as to determine the sorting area to which the hardware fittings go, when the hardware fittings move in the conveying channel, the purpose of interval conveying is realized by the setting of the blocking air cylinder 44, and the position of the moving plate 43 can be adjusted through the adjusting part, the moving plate 43 drives the blocking air cylinder 44 to move, so that the size of the hardware fittings can be adjusted, so that a plurality of different hardware fittings can be adapted, when the hardware fittings reach the specified position, the arc-shaped rack 610 is driven to rotate by the rotating driving part, since the arc-shaped rack 610 is engaged with the second gear 68, the second gear 68 is driven to rotate by the rotation of the arc-shaped rack 610, and the rotating shaft 66 is driven to rotate by the rotation of the second gear 68, the first gear 67 is driven to rotate by the rotation of the rotating shaft 66, and since the first gear 67 is engaged with the first rack 63, the first rack 63 is driven to move by the first gear 67, the first rack 63 moves in the sliding sleeve 62, and the limiting plate 64 is driven to move by the first rack 63, so as to drive the guide plate 61 to move, the hardware fittings are guided to the specified partition slide plate 5 by the guide plate 61, so as to realize automatic sorting.
[0038] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.
Claims
1. A partition-oriented intelligent automatic sorting device for furniture hardware, characterized in that: The invention comprises a conveyor (1), wherein the conveyor (1) is provided with an identification code scanning gate bridge (2), and blocking frames (3) are provided on both side walls of the conveyor (1), a conveying channel is formed between the two blocking frames (3), and an interval conveying assembly (4) for interval conveying hardware accessories is provided at the top of the blocking frame (3), partition slides (5) are provided on both sides of the conveyor (1), and a guide assembly (6) is also provided on the conveyor (1), and the guide assembly (6) includes a guide plate (61) for pushing the hardware accessories to the partition slide (5) and a reciprocating drive component for driving the guide plate (61) to move back and forth.
2. The intelligent automatic sorting device for furniture hardware with guided partitioning according to claim 1 is characterized in that: The reciprocating drive component includes a sliding sleeve (62), a first rack (63), a limiting plate (64), a mounting frame (65), a rotating shaft (66), a first gear (67), a second gear (68), an extension frame (69), an arc-shaped rack (610), a first connecting rod (611), a supporting frame (612), a second motor (613), and a second connecting rod (614); The sliding sleeve (62) is arranged on one side of the conveyor (1); The first rack (63) is movably disposed in the sliding sleeve (62), and one end of the first rack (63) is connected to the guide plate (61); The limiting plate (64) is arranged at an end of the first rack (63) away from the guide plate (61); The mounting frame (65) is arranged on the sliding sleeve (62); The rotating shaft (66) is arranged in the mounting frame (65); The first gear (67) is arranged on the rotating shaft (66), and the first gear (67) is meshed with the first rack (63); The second gear (68) is arranged on the rotating shaft (66) and is located on one side of the first gear (67); The extension frame (69) is arranged on the sliding sleeve (62) and is located on one side of the sliding sleeve (62); The arc-shaped rack (610) is rotatably arranged on the extension frame (69), and the conveyor (1) is also provided with a rotation driving component for driving the arc-shaped rack (610) to rotate.
3. The intelligent automatic sorting device for furniture hardware with guided partitioning according to claim 2 is characterized in that: The rotation driving component includes a first connecting rod (611), a support frame (612), a second motor (613), and a second connecting rod (614); The first connecting rod (611) is hingedly arranged on one side of the arc-shaped rack (610); The support frame (612) is arranged at the bottom end of the conveyor (1); The second motor (613) is arranged on the support frame (612); The second connecting rod (614) is arranged at the output end of the second motor (613), and one end of the second connecting rod (614) is hinged to the first connecting rod (611).
4. The intelligent automatic sorting device for furniture hardware with guided partitioning according to claim 2 is characterized in that: Limiting slide blocks are provided on both sides of the first rack (63), and a limiting sliding groove for the limiting slide blocks to move is provided on the inner side of the sliding sleeve (62).
5. The intelligent automatic sorting device for furniture hardware with guided partitioning according to claim 1 is characterized in that: The interval conveying assembly (4) comprises a support column (41), a drive box (42), a moving plate (43) and a blocking cylinder (44); The support columns (41) are provided in two and are arranged on the blocking frame (3); The driving box (42) is arranged at the top end of the supporting column (41); The movable plate (43) is movably arranged on the inner side of the two groups of support columns (41); the support columns (41) are provided with adjustment components for driving the movable plate (43) to move; The blocking cylinder (44) is arranged at the bottom end of the moving plate (43).
6. The intelligent automatic sorting device for furniture hardware with guided partitioning according to claim 5 is characterized in that: The adjusting component includes a rectangular slot (45), a threaded column (46), a driving block (47), a first motor (48), a first synchronous wheel (49), a rotating rod (410), a second synchronous wheel (411) and a first synchronous belt (412); The rectangular groove (45) is opened in each supporting column (41); The threaded columns (46) are provided with two and are correspondingly arranged in the rectangular grooves (45); The driving block (47) is arranged on the threaded column (46); The first motor (48) is disposed in a drive box (42); The first synchronous wheel (49) is arranged at the output end of the first motor (48); The rotating rod (410) is arranged in the driving box (42) on one side of the first motor (48), and the rotating rod (410) is connected to a threaded column (46) on one side; The second synchronous wheel (411) is arranged on the rotating rod (410); The first synchronous belt (412) is sleeved on the first synchronous wheel (49) and the second synchronous wheel (411), and the rotating rod (410) is also provided with a synchronous component for driving the threaded column (46) on the other side to rotate synchronously.
7. The intelligent automatic sorting device for furniture hardware with guided partitioning according to claim 6 is characterized in that: The synchronization component includes a driving rod (413), a third synchronization wheel (414), a fourth synchronization wheel (415) and a second synchronization belt (416); The driving rod (413) is arranged in the driving box (42) and is located on a side of the first motor (48) away from the rotating rod (410); The third synchronous wheel (414) is arranged on the driving rod (413); The fourth synchronous wheel (415) is arranged on the rotating rod (410) and is located below the second synchronous wheel (411); The second synchronous belt (416) is sleeved on the third synchronous wheel (414) and the fourth synchronous wheel (415).