Step-by-step box turnover machine

Abstract

The invention relates to a step-by-step type box turnover machine, which belongs to the technical field of lost foam casting, and comprises a base, a first turnover frame and a second turnover frame, the first turnover frame and the second turnover frame are arranged on the base, the first turnover frame is rotatably connected with the base, the second turnover frame is rotatably connected with the first turnover frame, a first telescopic rod is arranged between the first turnover frame and the base, and a second telescopic rod is arranged between the second turnover frame and the base. A first telescopic rod is arranged between the first overturning frame and the second overturning frame and used for overturning the first overturning frame and the second overturning frame from a first position to a second position, a second telescopic rod is arranged between the second overturning frame and the first overturning frame and used for overturning the second overturning frame from the second position to a third position, and a box hopper is arranged on the second overturning frame. According to the device, the box hopper is turned over twice at a small angle, so that the stability of the turning action is improved, a casting in the box hopper is prevented from moving at a large throwing angle, and the possibility that the casting is damaged is reduced. In addition, the stroke of the first telescopic rod and the stroke of the second telescopic rod are smaller, and optimization of the space layout of the box turnover machine is facilitated.

Description

Technical Field

[0001] The present application relates to the field of lost foam casting, and in particular to a step-by-step box turning machine. Background Art

[0002] Lost foam casting (LFC) is a novel casting method that combines paraffin wax or foam patterns of similar size and shape to the casting into a pattern cluster. After being coated with a refractory coating and dried, the cluster is embedded in dry quartz sand and vibrated to form the pattern. Poured under negative pressure, the pattern vaporizes, allowing liquid metal to occupy the pattern. After solidification and cooling, the casting forms. Lost foam casting offers ample freedom in casting structural design. With the rapid development of today's industry, the advantages of LFC technology are becoming increasingly apparent, and many small and medium-sized enterprises have begun production. The LFC process is not simple. It requires first creating a foamed pattern, then applying a special high-temperature resistant coating to the foamed pattern. After the coating is dried, the pattern is placed in a special sand box and filled with dry sand according to the process requirements. It is compacted using three-dimensional vibration, and then molten metal is poured. The pattern then vaporizes due to the high temperature, displacing the pattern with the molten metal, resulting in a casting that is identical to the foamed pattern. After the casting cools, it must be removed from the dry sand, and the dry sand must also be removed from the sand box.

[0003] In the prior art, castings are typically removed from a flask using a flipping machine. Chinese Patent Publication No. CN214349556U discloses a lost foam casting flask flipping machine comprising a frame fixed to the ground, a base rotatably mounted on the frame, a discharge hopper connected to the base via a telescopic mechanism for driving the discharge hopper up and down, a mounting base fixed to the ground, the base and mounting base connected via a first oil cylinder, and a positioning mechanism for securing the flask. During use, the first oil cylinder causes the base to flip, thereby flipping the entire flask after casting, allowing the casting and dry sand therein to be poured out together.

[0004] Regarding the above technical solution, the inventors believe that the angle of rotation during the one-time flipping of the discharge hopper by the first hydraulic cylinder is too large, resulting in instability. This causes the castings and dry sand in the discharge hopper to be thrown at a large angle during sand dumping, which can easily damage the castings. Furthermore, because the first hydraulic cylinder requires the hopper to flip into position all at once, it is typically long and occupies a large area, which is detrimental to the overall layout of the casting production line. Summary of the Invention

[0005] In order to reduce the possibility of damage to castings and reduce the floor space, the present application provides a step-by-step box turning machine.

[0006] The present application provides a step-by-step box turning machine, which adopts the following technical solutions:

[0007] A step-by-step box turning machine includes a base and a first turning frame and a second turning frame provided on the base, wherein the first turning frame is rotatably connected to the base, and the second turning frame is rotatably connected to the first turning frame. A first telescopic rod is provided between the first turning frame and the base, and the first telescopic rod is used to turn the first turning frame and the second turning frame from a first position to a second position. A second telescopic rod is provided between the second turning frame and the first turning frame, and the second telescopic rod is used to turn the second turning frame from the second position to a third position. A box bucket is provided on the second turning frame.

[0008] One end of the first telescopic rod is hinged to the base, and the other end is hinged to the first flip frame; one end of the second telescopic rod is hinged to the first flip frame, and the other end is hinged to the second flip frame;

[0009] The box bucket is rotatably connected to the second turning frame, and the second turning frame is provided with an angle fine-adjustment mechanism, and the angle fine-adjustment mechanism is connected to the box bucket;

[0010] The box bucket is set on the second flip frame through the rotation of the shaft rod. The angle fine-tuning mechanism includes a follower plate fixedly connected to the shaft rod. The follower plate is provided with a first point. The second flip frame is provided with a gas spring. One end of the gas spring is hinged to the second flip frame, and the other end is hinged to the first point.

[0011] Optionally, a second position and a third position are further provided on the follower plate, and the distances from the second position and the third position to the axis of the shaft are equal to the distance from the first position to the axis of the shaft, an arc-shaped limit groove is provided on the second flip frame, and the first position, the second position and the third position are all provided with limit wheels adapted to the arc-shaped limit groove.

[0012] Optionally, the angle fine-adjustment mechanism further includes a first auxiliary connecting rod and a second auxiliary connecting rod, and the box bucket is slidably connected to a first slider and a second slider;

[0013] One end of the first auxiliary connecting rod is hinged to the second position, and the other end is hinged to the first slider;

[0014] One end of the second auxiliary connecting rod is hinged to the third position, and the other end is hinged to the second sliding block.

[0015] Optionally, the gas spring is a bidirectional pressure-triggered self-locking gas spring, which is set with an upper pressure threshold and a lower pressure threshold. When the pressure applied to the gas spring reaches the upper pressure threshold, the gas spring is in an unlocked state; when the pressure applied to the gas spring drops to the lower pressure threshold after being unlocked, the gas spring resets and is in a locked state.

[0016] Optionally, a rotating rod is rotatably connected to the second flip frame, the rotating rod is located below the box bucket, a knocking piece is provided on the rotating rod, and the second flip frame is provided with a driving mechanism for driving the rotating rod to rotate.

[0017] Optionally, the driving mechanism includes a sector gear and a transmission assembly connected to the sector gear, the sector gear is coaxially fixed to the shaft, the sector gear is integrally formed on the follower plate, and the transmission assembly is transmission-connected to the rotating rod.

[0018] Optionally, the transmission assembly includes a transmission gear and a first synchronous wheel coaxially fixed and rotatably connected to the second flip frame, the transmission gear is meshed with the fan gear, a second synchronous wheel is coaxially fixed on the rotating rod, and a synchronous belt is provided on the first synchronous wheel and the second synchronous wheel.

[0019] Optionally, the knocking member includes a knocking rod and a knocking head, one end of the knocking rod is fixed to the rotating rod, and the other end is fixed to the knocking head, the knocking rod has a certain elasticity, and the rotation center line of the rotating rod and the rotation center line of the shaft rod are located on the same vertical plane. When the rotating rod rotates and the knocking rod is in a natural state, the radius of the circular arc trajectory formed by the outermost end of the knocking head is greater than the distance from the rotation center line of the rotating rod to the bottom wall of the box bucket.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. Through the arrangement of the first flip frame, the second flip frame, the first telescopic rod and the second telescopic rod, when in use, the first telescopic rod first drives the first flip frame and the second flip frame to flip from the initial first position to the second position, and then the second telescopic rod drives the second flip frame to flip from the second position to the third position. The box bucket is flipped through two consecutive flipping actions, which facilitates the pouring out of the castings and dry sand in the box bucket. Compared with the flipping action of flipping into place at one time, the angle of each flip in the present application is smaller, which is conducive to improving the stability of the flipping action. In addition to improving the overall balance performance of the box tipping machine, it is also conducive to avoiding large-angle motion of the castings in the box bucket, thereby reducing the possibility of damage to the castings. In addition, the required stroke of the first telescopic rod and the second telescopic rod is less, which is conducive to optimizing the spatial layout of the box tipping machine, reducing the floor space, and improving the overall layout of the casting line.

[0022] 2. Through the setting of the angle fine-adjustment mechanism, when in use, in order to avoid the dry sand in the bucket from spilling during the flipping process, when the flipping frame is in the third position, the top opening of the bucket is set to be obliquely upward, that is, the flipping angle of the bucket is slightly less than 90 degrees. The angle fine-adjustment mechanism can make the bucket and the second flipping frame achieve a small deflection, thereby further making the top opening of the bucket be set to be slightly obliquely downward, that is, the flipping angle of the bucket is slightly greater than 90 degrees, which facilitates the pouring out of the castings and dry sand in the bucket.

[0023] 3. Through the setting of the driving mechanism and the knocking piece, the driving mechanism can drive the rotating rod to rotate, and the rotation of the rotating rod drives the knocking piece to rotate, and when the knocking rod in the knocking piece rotates, it can drive the knocking head to rotate. During the rotation of the knocking head, it collides with the bottom wall of the box bucket, thereby causing the bottom wall of the box bucket to vibrate, which can prompt the casting and dry sand to quickly separate from the box bucket, making it convenient for the box bucket to completely dump the dry sand therein.

[0024] 4. Through the setting of the sector gear and the transmission assembly, there is no need to set up an additional driving source. The deflection of the box bucket itself drives the rotating rod to rotate, and then the knocking piece knocks on the bottom wall of the box bucket, which makes it easier for the box bucket to dump the dry sand therein completely. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of a step-by-step carton turning machine according to an embodiment of the present application.

[0026] Figure 2 It is a structural schematic diagram showing the carton tipping machine in the first position.

[0027] Figure 3 It is a structural schematic diagram showing that the carton tipper is in the second position.

[0028] Figure 4 It is a structural schematic diagram showing that the carton tipper is in the third position.

[0029] Figure 5 It is a structural diagram of the angle fine-tuning mechanism in the embodiment of the present application.

[0030] Figure 6 It is a structural diagram of the driving mechanism in the embodiment of the present application.

[0031] Explanation of the accompanying drawings: 1. Base; 11. First telescopic rod; 2. First flip frame; 21. Second telescopic rod; 3. Second flip frame; 31. Arc-shaped limit groove; 32. Limit wheel; 33. Rotating rod; 34. Knocking piece; 341. Knocking rod; 342. Knocking head; 4. Box; 41. Shaft; 42. First slide rail; 421. First slider; 43. Second slide rail; 431. Second slider; 5. Angle fine-tuning mechanism; 51. Follow-up plate; 511. First position; 512. Second position; 513. Third position; 52. Gas spring; 53. First auxiliary connecting rod; 54. Second auxiliary connecting rod; 6. Driving mechanism; 61. Fan gear; 62. Transmission assembly; 621. Transmission gear; 622. First synchronous wheel; 623. Second synchronous wheel; 624. Synchronous belt. DETAILED DESCRIPTION

[0032] The following combination Figures 1-6 , further details of this application are given.

[0033] Example:

[0034] The embodiment of the present application discloses a step-by-step box turning machine. Figure 1 A step-by-step box turning machine includes a base 1, a first turning frame 2 and a second turning frame 3. The first turning frame 2 is rotatably connected to the base 1, and the second turning frame 3 is rotatably connected to the first turning frame 2.

[0035] Reference Figure 2-Figure 4 A first telescopic rod 11 is provided between the first tilting frame 2 and the base 1. The first telescopic rod 11 is used to tilt the first tilting frame 2 and the second tilting frame 3 from a first position to a second position. A second telescopic rod 21 is provided between the second tilting frame 3 and the first tilting frame 2. The second telescopic rod 21 is used to tilt the second tilting frame 3 from the second position to a third position. The second tilting frame 3 is provided with a container 4. One end of the first telescopic rod 11 is hinged to the base 1, and the other end is hinged to the first tilting frame 2; one end of the second telescopic rod 21 is hinged to the first tilting frame 2, and the other end is hinged to the second tilting frame 3. In this embodiment, the first telescopic rod 11 and the second telescopic rod 21 are each one of a hydraulic telescopic rod, a pneumatic telescopic rod, or an electric telescopic rod.

[0036] During use, the first telescopic rod 11 first drives the first flip frame 2 and the second flip frame 3 to flip from the initial first position to the second position, and then the second telescopic rod 21 drives the second flip frame 3 to flip from the second position to the third position. Through two consecutive flipping actions, the box bucket 4 is flipped, which facilitates the pouring out of the castings and dry sand in the box bucket 4. Compared with the flipping action of flipping into place at one time, the angle of each flip in the present application is smaller, which is conducive to improving the stability of the flipping action. In addition to improving the overall balance performance of the box flipping machine, it is also beneficial to avoid large-angle motion of the castings in the box bucket 4, thereby reducing the possibility of damage to the castings. In addition, the required stroke of the first telescopic rod 11 and the second telescopic rod 21 is less, which is conducive to optimizing the spatial layout of the box flipping machine, reducing the floor space, and improving the overall layout of the casting line.

[0037] Reference Figure 5 The bucket 4 is rotatably connected to the second turning frame 3. The second turning frame 3 is provided with an angle fine-adjustment mechanism 5, which is connected to the bucket 4. During use, in order to prevent the dry sand in the bucket 4 from spilling during the turning process, when the turning frame is in the third position, the top opening of the bucket 4 faces the front or is set obliquely upward, that is, the turning angle of the bucket 4 is equal to or slightly less than 90 degrees. The angle fine-adjustment mechanism 5 can then cause the bucket 4 and the second turning frame 3 to achieve a small deflection, thereby further causing the top opening of the bucket 4 to be set slightly obliquely downward, that is, the turning angle of the bucket 4 is slightly greater than 90 degrees, thereby facilitating the pouring out of the castings and dry sand in the bucket 4.

[0038] Reference Figure 5 The box 4 is rotatably mounted on the second tilting frame 3 via a shaft 41. The angle fine-adjustment mechanism 5 includes a follower plate 51 fixedly connected to the shaft 41, with a first position 511 defined on the follower plate 51. A gas spring 52 is mounted on the second tilting frame 3, with one end of the gas spring 52 hinged to the second tilting frame 3 and the other end hinged to the first position 511. In this embodiment, the gas spring 52 is a bidirectional, pressure-triggered, self-locking gas spring with an upper pressure threshold and a lower pressure threshold. When the pressure applied to the gas spring 52 reaches the upper pressure threshold, the gas spring 52 is unlocked and can freely expand and contract. When the pressure applied to the gas spring 52 drops below the lower pressure threshold after being unlocked, the gas spring 52 returns to its locked position.

[0039] During the tipping process, the center of gravity of the bucket 4 continuously changes, increasing the pressure on the gas spring 52. When the bucket 4 tips over to the third position, the pressure on the gas spring 52 reaches the preset upper pressure threshold. At this point, the gas spring 52 is unlocked, compressed, and causes the follower plate 51 to deflect. The deflection of the follower plate 51 causes the shaft 41 to rotate, which in turn causes the bucket 4 to deflect, even if the bucket 4 rotates a certain angle relative to the second tipping frame 3. When the castings and dry sand in the bucket 4 are completely poured out, the pressure on the gas spring 52 drops to the lower pressure threshold, causing the gas spring 52 to return the follower plate 51 to its locked position, thereby returning the bucket 4 to its original position.

[0040] Reference Figure 5-Figure 6 To improve the load-bearing capacity of the box 4 and reduce the relative load on the shaft 41, the follower plate 51 is further provided with a second location 512 and a third location 513. Assuming the distance from the first location 511 to the axis of the shaft 41 is d1, the distance from the second location 512 to the axis of the shaft 41 is d2, and the distance from the third location 513 to the axis of the shaft 41 is d3, the following relationship is satisfied: d1 = d2 = d3. An arcuate limiting groove 31 is defined on the sidewall of the second tilting frame 3. The first, second, and third locations 511, 512, 513 are all rotatably connected to limiting wheels 32 that mate with the arcuate limiting groove 31. Thus, the first, second, and third locations 511, 512, 513, and their respective limiting wheels 32 work together to form a multi-directional constraint mechanism, which helps enhance the stability of the follower plate 51's rotational trajectory and prevent the shaft 41 from experiencing eccentric torque. The curved limiting groove 31 and limiting wheel 32 form a physical guide, providing sliding resistance and buffering when the gas spring 52 is in operation, preventing the follower plate 51 from shaking or deflecting. Furthermore, the three-point support arrangement formed by the first point 511, the second point 512, and the third point 513 evenly distributes the load of the container 4 to the second tilting frame 3, significantly reducing the single-point load on the shaft 41 and thus extending the service life of the tilting machine.

[0041] Reference Figure 5-Figure 6 The angle fine-tuning mechanism 5 also includes a first auxiliary link 53 and a second auxiliary link 54. A first slide rail 42 and a second slide rail 43 are fixed to the bottom end of the side wall of the container 4. The first and second slide rails 42 and 43 are located on either side of the shaft 41, respectively, and their lengths are parallel to the bottom wall of the container 4. A first slider 421 is slidably connected to the first slide rail 42, and a second slider 431 is slidably connected to the second slide rail 43. One end of the first auxiliary link 53 is hinged to the second position 512, and the other end of the first auxiliary link 53 is hinged to the first slider 421. One end of the second auxiliary link 54 is hinged to the third position 513, and the other end of the second auxiliary link 54 is hinged to the second slider 431.

[0042] During the deflection of the bucket 4, the first auxiliary link 53 and the second auxiliary link 54 form a mechanical transmission path on either side of the shaft 41. This dynamic triangle, formed by the second point 512, the center of the shaft 41, and the hinge point of the first slider 421, and another dynamic triangle formed by the third point 513, the center of the shaft 41, and the hinge point of the second slider 431, maintains geometric stability during fine-tuning, thereby ensuring the stability of the bucket 4 during deflection. Furthermore, through the linkage of these two dynamic triangles, the rotational motion of the follower plate 51 is converted into a bidirectional sliding motion at the bottom of the bucket 4. The form-locking properties of the triangular structure effectively suppress lateral sway of the bucket 4. When subjected to the load of the bucket 4, the first and second auxiliary links 53, 54 convert vertical pressure into lateral force components for the first and second sliders 421, 431 through force decomposition at the triangle vertices, effectively reducing radial shear stress on the shaft 41.

[0043] Reference Figure 5-Figure 6 The second tilting frame 3 is rotatably connected to a rotating rod 33 located below the container 4. A striking member 34 is provided on the outer side of the rotating rod 33. The second tilting frame 3 is provided with a driving mechanism 6 for driving the rotating rod 33 to rotate. The striking member 34 includes a striking rod 341 and a striking head 342. One end of the striking rod 341 is fixed to the rotating rod 33, and the other end is fixed to the striking head 342. The striking rod 341 has a certain degree of elasticity, and the rotation centerline of the rotating rod 33 and the rotation centerline of the shaft 41 are located in the same vertical plane. When the rotating rod 33 is rotating and the striking rod 341 is in a neutral state, the radius of the arc-shaped trajectory formed by the outermost end of the striking head 342 is greater than the distance from the rotation centerline of the rotating rod 33 to the bottom wall of the container 4.

[0044] During use, the driving mechanism 6 can drive the rotating rod 33 to rotate, and the rotation of the rotating rod 33 drives the striking member 34 to rotate. When the striking rod 341 in the striking member 34 rotates, it can drive the striking head 342 to rotate. During the rotation process, the striking head 342 collides with the bottom wall of the box bucket 4, thereby causing the bottom wall of the box bucket 4 to vibrate. The striking rod 341 has a certain degree of flexibility. Therefore, after the striking head 342 strikes the bottom wall of the box bucket 4, the striking rod 341 can be deformed so as to pass between the rotating rod 33 and the bottom wall of the box bucket 4. In this way, when the box bucket 4 is pouring castings and dry sand, the vibration generated by the bottom wall of the box bucket 4 can prompt the castings and dry sand to quickly separate from the box bucket 4, so that the box bucket 4 can completely pour out the dry sand.

[0045] Reference Figure 5-Figure 6The drive mechanism 6 includes a sector gear 61 and a transmission assembly 62 connected to the sector gear 61. The sector gear 61 is coaxially fixed to the shaft 41 and integrally formed on the follower plate 51. The transmission assembly 62 is in driving connection with the rotating rod 33. The transmission assembly 62 includes a transmission gear 621 and a first synchronous wheel 622, which are coaxially fixed and rotationally connected to the second tilting frame 3. The transmission gear 621 meshes with the sector gear 61. A second synchronous wheel 623 is coaxially fixed to the rotating rod 33. A timing belt 624 is provided around the first and second synchronous wheels 622 and 623. To increase the frequency of the striking member 34 striking the bottom wall of the container 4, the transmission ratio of the transmission assembly 62 is greater than 1. In this embodiment, specifically, the outer diameter of the first synchronous wheel 622 is greater than the outer diameter of the second synchronous wheel 623. Furthermore, the outer diameter of the first synchronous wheel 622 is greater than the outer diameter of the transmission gear 621.

[0046] When the gas spring 52 drives the follower plate 51 to rotate, which in turn drives the bucket 4 to flip so that the bucket 4 can pour out the castings and dry sand, at the same time, the rotation of the follower plate 51 drives the sector gear 61 to rotate synchronously, and the rotation of the sector gear 61 drives the transmission gear 621 to rotate, and the rotation of the transmission gear 621 drives the first synchronous wheel 622 to rotate, which in turn drives the second synchronous wheel 623 to rotate through the synchronous belt 624, and the rotation of the second synchronous wheel 623 drives the rotation of the rotating rod 33. In this way, without the need for an additional driving source, the deflection of the bucket 4 itself drives the rotation of the rotating rod 33, which in turn causes the knocking member 34 to knock on the bottom wall of the bucket 4, so that the bucket 4 can completely pour out the dry sand therein.

[0047] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A step-by-step carton turning machine, characterized in that: The utility model comprises a base (1) and a first flip frame (2) and a second flip frame (3) arranged on the base (1); the first flip frame (2) and the base (1) are rotatably connected; the second flip frame (3) is rotatably connected to the first flip frame (2); a first telescopic rod (11) is provided between the first flip frame (2) and the base (1); the first telescopic rod (11) is used to flip the first flip frame (2) and the second flip frame (3) from a first position to a second position; a second telescopic rod (21) is provided between the second flip frame (3) and the first flip frame (2); the second telescopic rod (21) is used to flip the second flip frame (3) from the second position to a third position; and a box (4) is provided on the second flip frame (3); One end of the first telescopic rod (11) is hinged to the base (1), and the other end is hinged to the first flip frame (2); one end of the second telescopic rod (21) is hinged to the first flip frame (2), and the other end is hinged to the second flip frame (3); The box bucket (4) is rotatably connected to the second turning frame (3); the second turning frame (3) is provided with an angle fine-adjustment mechanism (5); and the angle fine-adjustment mechanism (5) is connected to the box bucket (4); The box bucket (4) is rotatably arranged on the second turning frame (3) through a shaft (41); the angle fine-adjusting mechanism (5) comprises a follower plate (51) fixedly connected to the shaft (41); a first point (511) is provided on the follower plate (51); a gas spring (52) is provided on the second turning frame (3); one end of the gas spring (52) is hinged to the second turning frame (3), and the other end is hinged to the first point (511).

2. The step-by-step carton turning machine according to claim 1, characterized in that: The follower plate (51) is further provided with a second position (512) and a third position (513), and the distances from the second position (512) and the third position (513) to the axis of the shaft (41) are equal to the distance from the first position (511) to the axis of the shaft (41). The second flip frame (3) is provided with an arc-shaped limiting groove (31), and the first position (511), the second position (512) and the third position (513) are all provided with limiting wheels (32) adapted to the arc-shaped limiting groove (31).

3. The step-by-step carton turning machine according to claim 2, characterized in that: The angle fine-tuning mechanism (5) further comprises a first auxiliary connecting rod (53) and a second auxiliary connecting rod (54); a first sliding block (421) and a second sliding block (431) are slidably connected to the box (4); One end of the first auxiliary connecting rod (53) is hinged to the second position (512), and the other end is hinged to the first sliding block (421); One end of the second auxiliary connecting rod (54) is hinged to the third position (513), and the other end is hinged to the second sliding block (431).

4. The step-by-step carton turning machine according to claim 1, characterized in that: The gas spring (52) is a bidirectional pressure-triggered self-locking gas spring, which is set with an upper pressure threshold and a lower pressure threshold. When the pressure on the gas spring (52) reaches the upper pressure threshold, the gas spring (52) is in an unlocked state; when the pressure on the gas spring (52) drops to the lower pressure threshold after being unlocked, the gas spring (52) is reset and is in a locked state.

5. The step-by-step carton turning machine according to claim 3, characterized in that: A rotating rod (33) is rotatably connected to the second overturning frame (3), the rotating rod (33) is located below the box bucket (4), a knocking piece (34) is provided on the rotating rod (33), and a driving mechanism (6) for driving the rotating rod (33) to rotate is provided on the second overturning frame (3).

6. The step-by-step carton turning machine according to claim 5, characterized in that: The driving mechanism (6) comprises a sector gear (61) and a transmission assembly (62) connected to the sector gear (61); the sector gear (61) is coaxially fixed to the shaft (41); the sector gear (61) is integrally formed on the follower plate (51); and the transmission assembly (62) is transmission-connected to the rotating rod (33).

7. The step-by-step carton turning machine according to claim 6, characterized in that: The transmission assembly (62) comprises a transmission gear (621) and a first synchronous wheel (622) coaxially fixed and rotatably connected to the second flip frame (3); the transmission gear (621) is meshed with the sector gear (61); a second synchronous wheel (623) is coaxially fixed on the rotating rod (33); and a synchronous belt (624) is sleeved on the first synchronous wheel (622) and the second synchronous wheel (623).

8. The step-by-step carton turning machine according to claim 5, characterized in that: The knocking member (34) comprises a knocking rod (341) and a knocking head (342), one end of the knocking rod (341) is fixed to the rotating rod (33), and the other end is fixed to the knocking head (342), the knocking rod (341) has a certain elasticity, the rotation center line of the rotating rod (33) and the rotation center line of the shaft (41) are located on the same vertical plane, when the rotating rod (33) rotates and the knocking rod (341) is in a natural state, the radius of the arc-shaped track formed by the outermost end of the knocking head (342) is greater than the distance from the rotation center line of the rotating rod (33) to the bottom wall of the box (4).

Images